close

Вход

Забыли?

вход по аккаунту

?

JP2015095763

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2015095763
[PROBLEMS] To provide a sound generator detection device capable of specifying the position of
a moving sound generator in real time. A sounding body detection device (1) specifies a specific
sound electrical signal (A31 to A33) from sounds (A11 to A13) output from a microphone (111
to 113), and a specific sound electrical signal (A31 to A33). The sound generator coordinates
(A50) can be specified by calculating the arrival time difference (A41 to A42) of A33).
Furthermore, the sounding body coordinates (A50) are specified as the position of the sounding
body at the previous time with respect to the specific sound electric signal (A31 to A33) output
earlier, and the specific sound electric signal (A31 to A33) output subsequently is specified.
Unlike the techniques disclosed in Non-Patent Document 1 and Patent Document 1, by specifying
the sounding body coordinates (A50) as the position of the sounding body this time, the position
of the moving sounding body is specified in real time. Can. [Selected figure] Figure 5
Sound detector
[0001]
The present invention relates to a sound generator detection device that detects the position of a
sound generator in space.
[0002]
There is known a technique for detecting the position of a sound source using a plurality of
microphones (for example, Non-Patent Document 1).
03-05-2019
1
In the technique described in Non-Patent Document 1, the sound is collected by a plurality of (for
example, three) microphones, and the difference between the arrival times of one sound and the
other sounds among the plurality of sounds is used. A plurality of (for example, two) arrival time
differences are calculated, and the position of the sound source is detected by calculation using
the installation positions of the three microphones and the two arrival time differences.
[0003]
Further, there is known a technique of collecting sound by a plurality of microphones and
detecting an abnormal sound according to the magnitude of the specific sound (for example,
Patent Document 1). In the technique described in Patent Document 1, sounds (mixed signals)
are collected by a plurality of microphones, and a plurality of frequency components (individual
signals) of specific sounds that are sounds emitted by the sounding body are extracted from the
plurality of mixed signals. Do. Then, the position of the sound source is detected by matrix
operation using the installation positions of the plurality of microphones and the plurality of
individual signals.
[0004]
JP, 2011-203048, A
[0005]
"Three point microphone sound source position detection device", [online], December 15, 2004,
The 7th Dentsu University Electronics Contest Free Division, [Sept. 26, 2013 search], Internet
<URL: http: http: / / www.gp.uec.ac.jp/elecon/2004electronics-contest/work ... / work_16.htm>
[0006]
However, the techniques disclosed in Non-Patent Document 1 and Patent Document 1 detect a
sound source installed somewhere, and do not detect a moving sound source (hereinafter
referred to as a sound generator).
[0007]
The present invention has been made in view of the above-described conventional problems, and
it is an object of the present invention to provide a sounding body detection device capable of
specifying in real time the position of a moving sounding body.
03-05-2019
2
[0008]
In a first aspect of the present invention, a sound generator detection device converts M (M is an
integer of 3 or more) microphones for collecting sound and sounds output from the M
microphones into electric signals. Specific sound electrical signal extraction that outputs a
specific sound electrical signal obtained by extracting a frequency component of a specific sound
that is a sound emitted by a moving sound generator from the signal conversion circuit and the
M electrical signals output from the signal conversion circuit N which is a difference between
arrival times of a specific sound electrical signal of the filter and one of the M specific sound
electrical signals output from the specific sound electrical signal extraction filter and the other
specific sound electrical signals A signal time difference detection unit sequentially calculating
the arrival time differences of N pieces (N is an integer), coordinates representing installation
positions of the M microphones, and the N arrival time differences previously output from the
signal time difference detection unit Based on the previous sounding body The coordinates of the
sounding body this time are detected based on the coordinates of the M microphones and the N
arrival time differences subsequently output from the signal time difference detection unit, which
detect the previous sounding body coordinates as a target. The present invention is characterized
by comprising a coordinate detection unit for detecting the sound generator coordinates.
[0009]
According to a second aspect of the present invention, a sound generator detection device
converts M (M is an integer of 3 or more) microphones for collecting sound and sounds output
from the M microphones into electric signals. Specific sound electrical signal extraction that
outputs a specific sound electrical signal obtained by extracting a frequency component of a
specific sound that is a sound emitted by a moving sound generator from the signal conversion
circuit and the M electrical signals output from the signal conversion circuit A filter, and a
specific sound electrical signal determination unit that outputs a determination result signal
when voltage values of the M specific sound electrical signals output from the specific sound
electrical signal extraction filter are equal to or higher than a determination specific sound
voltage value; N, which is the difference between the arrival times of one of the M determination
result signals output from the specific sound electrical signal determination unit and one of the
other determination result signals (N is an integer Signal to sequentially calculate the arrival time
difference of The previous time which is the coordinates of the previous sounding body based on
the difference detection unit, the coordinates representing the installation positions of the M
microphones, and the N arrival time differences previously output from the signal time difference
detection unit Sounding body coordinates are detected, and based on the coordinates of the M
microphones and the N arrival time differences subsequently output from the signal time
difference detecting unit, the current sounding body coordinates which are the coordinates of the
sounding body this time And a coordinate detection unit for detecting
03-05-2019
3
[0010]
In the second aspect of the present invention, the specific sound electrical signal determination
unit determines that the voltage value of the M specific sound electrical signals previously output
from the specific sound electrical signal extraction filter is equal to or higher than the
determination specific sound voltage value. If so, the preceding M determination result signals
are output to the time difference detection unit, and the voltage values of the M specific sound
electrical signals subsequently output from the specific sound electrical signal extraction filter
are the determination specification When the voltage value is higher than the sound voltage
value and the voltage value changes with respect to the voltage value of the preceding specific
sound electrical signal, the subsequent M judgment result signals are output.
[0011]
In the first and second aspects of the present invention, the coordinate detection unit associates a
plurality of patterns of N time differences with the coordinates of the sounding body, and a
plurality of patterns stored in the time difference coordinate storage unit. And a coordinate
selection unit for selecting, as the coordinates of the sound generator, coordinates corresponding
to the N arrival time differences among the coordinates of the symbol.
[0012]
In a third aspect of the present invention, the sound generator detection device converts M (M is
an integer of 2 or more) microphones for collecting sound and sounds output from the M
microphones into electric signals. Specific sound electrical signal extraction that outputs a
specific sound electrical signal obtained by extracting a frequency component of a specific sound
that is a sound emitted by a moving sound generator from the signal conversion circuit and the
M electrical signals output from the signal conversion circuit A filter, a specific sound electrical
signal coordinate storage unit, M specific sound voltage values representing the magnitude of the
specific sound, and coordinates of the sounding body are associated with a plurality of patterns,
and are stored in advance in the specific sound electrical signal coordinate storage unit. Among
the coordinates of the plurality of patterns stored in the coordinate construction unit to be stored
and the specific sound electrical signal coordinate storage unit, the voltage of the M specific
sound electrical signals previously output from the specific sound electrical signal extraction
filter The coordinates corresponding to the value, The specific sound electrical signal extraction
filter is subsequently output from among the coordinates of the plurality of patterns selected as
the previous sounding body coordinates that are the coordinates of the sounding body of the
current time and stored in the specific sound electric signal coordinate storage unit The
coordinate detection unit may select coordinates corresponding to voltage values of the M
specific sound electrical signals as coordinates of the current sounding body which are
03-05-2019
4
coordinates of the current sounding body.
[0013]
In the first to third aspects of the present invention, the sound generator detection device further
includes a display unit for displaying image data including the previous sound generator
coordinates and the current sound generator coordinates.
[0014]
In the first to third aspects of the present invention, the sounding body detection device further
includes a movement history storage unit that stores the previous sounding body coordinates,
and the image data includes the current sounding body coordinates and the movement history. A
sound-production-body movement path connecting the sound-production-body movement
history including the previous sounding-body coordinates stored in the storage unit is further
included.
[0015]
In the first to third aspects of the present invention, the sounding body detection device is
characterized in that the at least one of the at least one of the M microphones is represented on
the basis of coordinates representing an installation position of at least one of the m
microphones The distance calculation unit may further include: a distance calculation unit that
calculates a distance between a microphone and the sound producing body as a calculation
distance.
[0016]
In the first to third aspects of the present invention, the sounding body detection device
generates a distance determination result indicating whether the calculated distance is included
in the set distance range, and the distance determination result. And an alarm notification unit
that outputs an alarm based on the above.
[0017]
In the first to third aspects of the present invention, a plurality of the set distance ranges are set,
and a type of the alarm is different for each set distance range.
[0018]
In a fourth aspect of the present invention, in a computer program, signal conversion processing
03-05-2019
5
for converting sounds collected by M (M is an integer of 3 or more) microphones into electrical
signals, and the M electrical signals, Specific sound electrical signal extraction processing for
extracting a specific sound electrical signal as a frequency component of a specific sound that is
a sound emitted by a moving sounding body, and one specific sound electrical signal of the M
specific sound electrical signals Signal time difference detection processing for sequentially
calculating N (N is an integer) arrival time differences which are differences in arrival times with
other specific sound electrical signals, coordinates representing the installation positions of the
M microphones, and the signals Last coordinate detection processing for detecting previous
sounding body coordinates which are coordinates of the last sounding body based on the N
arrival time differences previously output from time difference detection processing; coordinates
of the M microphones; Said signal time difference The was followed outputted from the output
processing on the basis of the N pieces of arrival time difference, and the current coordinate
detection process for detecting the current sounding body coordinates are the coordinates of the
current of the sounding body, to execute the processing of the computer.
[0019]
In a fifth aspect of the present invention, in a computer program, a signal conversion process of
converting sounds collected by M (M is an integer of 3 or more) microphones into electric
signals, and the M electric signals, Specific sound electrical signal extraction processing for
extracting a specific sound electrical signal as a frequency component of a specific sound which
is a sound emitted by a moving sounding body, and voltage values of the M specific sound
electrical signals are equal to or higher than the determination specific sound voltage value And
in the case of specific sound electrical signal determination processing that outputs a
determination result signal, and one of the M determination result signals output from the
specific sound electrical signal determination processing, and the other determination result
signal. From the signal time difference detection process which sequentially calculates N (N is an
integer) arrival time differences which are differences between arrival times with the
determination result signal, coordinates representing the installation positions of the M
microphones, and the signal time difference detection process Precedent From the previous
coordinate detection processing for detecting the previous sounding body coordinates which are
the coordinates of the previous sounding body based on the N arrival time differences, the
coordinates of the M microphones, and the signal time difference detection processing The
computer is made to execute each processing of the present coordinate detection processing of
detecting the present sounding body coordinates which are the coordinates of the present
sounding body on the basis of the N arrival time differences which are subsequently output.
[0020]
In a sixth aspect of the present invention, in a computer program, signal conversion processing
for converting sounds collected by M (M is an integer of 2 or more) microphones into electrical
03-05-2019
6
signals, and the M electrical signals, Specific sound electrical signal extraction processing for
extracting a specific sound electrical signal as a frequency component of a specific sound that is
a sound emitted by a moving sound generator, M specific sound voltage values representing the
magnitude of the specific sound, and the sound generator Coordinate construction processing for
associating a plurality of patterns with coordinates and storing them in a specific sound electrical
signal coordinate storage unit in advance, and the specific sound electrical signal from among the
coordinates of the plurality of patterns stored in the specific sound electrical signal coordinate
storage unit A previous coordinate detection process of selecting coordinates corresponding to
voltage values of the M specific sound electrical signals previously output from the extraction
process as coordinates of a previous sounding body which is coordinates of a previous sounding
body; Among the coordinates of the plurality of patterns stored in the signal coordinate storage
unit, the coordinates corresponding to the voltage values of the M specific sound electrical
signals subsequently output from the specific sound electrical signal extraction processing The
computer is made to execute each processing of the present coordinate detection processing
which is selected as the present sounding object coordinates which are the coordinates of the
body.
[0021]
According to the first and fourth aspects of the present invention, the specific sound (M specific
sound electrical signals) is specified from the sounds output from the M microphones by the
signal conversion circuit and the specific sound electrical signal extraction filter, By calculating
the arrival time difference of the specific sound by the time difference detection unit, the position
of the sounding body (sounding body coordinates) can be specified by the coordinate detection
unit.
Furthermore, according to the first and fourth aspects of the present invention, with respect to
the specific sound (M specific sound electrical signals) previously output from the specific sound
electrical signal extraction filter, the position of the previous sounding body (previous sounding
body) By specifying body coordinates) and specifying the position of the present sounding body
(current sounding body coordinates) for the specific sound (M specific sound electric signals)
subsequently output from the specific sound electric signal extraction filter Unlike the techniques
disclosed in Non-Patent Document 1 and Patent Document 1, the position of a moving sound
generator can be specified in real time.
[0022]
03-05-2019
7
According to the second and fifth aspects of the present invention, the specific sound (M specific
sound electrical signals) is specified and specified from the sounds output from the M
microphones by the signal conversion circuit and the specific sound electric signal extraction
filter. The sound / electric signal determination unit specifies the specific sound (M
determination result signals) whose volume (voltage value) is equal to or higher than the feature
amount (specific sound voltage value for determination), and the signal time difference detection
unit calculates the arrival time difference of the specific sound By doing this, the position of the
sound generator (sound generator coordinates) can be specified by the coordinate detection unit.
Furthermore, according to the second and fifth aspects of the present invention, the specific
sound which is previously output from the specific sound electrical signal extraction filter and
whose volume (voltage value) is equal to or higher than the feature amount (specific sound
voltage value for determination) The position of the previous sounding body (previous sounding
body coordinates) is specified with respect to (M specific sound electric signals), and the specific
sound electric signal extraction filter subsequently outputs, and the volume (voltage value) is
characteristic. By specifying the position of the current sounding body (current sounding body
coordinates) for a specific sound (M specific sound electrical signals) having an amount (specific
sound voltage value for determination) or more, Non Patent Literature 1 or Unlike the technique
disclosed in Patent Document 1, the position of a moving sound generator can be specified in
real time.
[0023]
According to the third and sixth aspects of the present invention, the coordinate construction
unit causes the specific sound electrical signal coordinate storage unit to construct the volume of
the specific sound (specific sound voltage value) and the coordinates of the sounding body, and A
specific sound (M specific sound electrical signals) is specified from the sound output from the
microphone by the signal conversion circuit and the specific sound electrical signal extraction
filter, and the coordinate detection unit refers to the specific sound electrical signal coordinate
storage unit. The position of the sounding body (sounding body coordinates) can be specified.
Furthermore, according to the third and sixth aspects of the present invention, with respect to
the specific sound (M specific sound electrical signals) previously output from the specific sound
electrical signal extraction filter, the position of the previous sounding body (previous sounding
body) By specifying body coordinates) and specifying the position of the present sounding body
03-05-2019
8
(current sounding body coordinates) for the specific sound (M specific sound electric signals)
subsequently output from the specific sound electric signal extraction filter Unlike the techniques
disclosed in Non-Patent Document 1 and Patent Document 1, the position of a moving sound
generator can be specified in real time.
Further, according to the third and sixth aspects of the present invention, since the specific sound
electrical signal coordinate storage unit is referred to, the complicated operation as in Non-Patent
Document 1 and Patent Document 1 is not required.
[0024]
FIG. 1 is a block diagram showing a sounding body detection system to which a sounding body
detection device 1 of the present invention is applied.
It is a block diagram which shows the structure of the sounding body detection apparatus 1 of
this invention.
It is a figure which shows the example to which the sounding body detection system of FIG. 1 is
applied.
It is a figure which shows the other example to which the sounding body detection system of FIG.
1 is applied.
FIG. 1 is a block diagram showing a configuration of a sounding body detection device 1
according to a first embodiment of the present invention.
It is a figure which shows the electric signals A21-A23 output from the signal conversion circuits
121-123.
It is a figure which shows the specific sound electric signal A31-A33 output from the specific
sound electric signal extraction filter 131-133.
03-05-2019
9
It is a figure which shows arrival time difference A41-A42 output from the signal time difference
detection part 140. FIG.
It is a figure which shows the coordinate showing the installation position of the microphones
111-113.
FIG. 2 is a block diagram showing a configuration of a coordinate detection unit 150.
It is a figure which shows the information memorize | stored in the time difference coordinate
memory | storage part 151. FIG.
It is a figure which shows the image data A70 displayed on the display part 12, when the
sounding body detection apparatus 1 which concerns on 1st Embodiment of this invention is an
image forming apparatus, and the sounding body 2 is a robot cleaner.
It is a figure which shows the image data A70 displayed on the display part 12, when the
sounding body detection apparatus 1 which concerns on 1st Embodiment of this invention is a
portable terminal, and the sounding body 2 is a mosquito.
It is a figure showing the alarm setting table applied when the sounding body detection
apparatus 1 which concerns on 1st Embodiment of this invention is an image forming apparatus,
and the sounding body 2 is a robot cleaner. It is a figure showing the alarm setting table applied
when the sounding body detection apparatus 1 which concerns on 1st Embodiment of this
invention is a portable terminal, and the sounding body 2 is a mosquito. It is a block diagram
which shows the structure of the sounding body detection apparatus 1 which concerns on 2nd
Embodiment of this invention. It is a figure which shows the relationship between the specific
sound voltage value for determination memorize | stored in the specific sound electrical signal
storage part 210 for determination, and the determination result signal (voltage value) output
from the specific sound electrical signal determination part 221-223. It is a figure which shows
the specific sound electric signal A31-A33 output from the specific sound electric signal
extraction filter 131-133 regarding the presence or absence of a specific sound. It is a figure
which shows the determination result signal B21-B23 output from the specific sound electrical
signal determination part 221-223 regarding the presence or absence of a specific sound. It is a
figure which shows arrival time difference A41-A42 output from the signal time difference
03-05-2019
10
detection part 240 regarding the presence or absence of a specific sound. It is a figure which
shows the image data A70 displayed on the display part 12, when the sounding body detection
apparatus 1 which concerns on 2nd Embodiment of this invention is an image forming
apparatus, and the sounding body 2 is a robot cleaner. It is a figure which shows the image data
A70 displayed on the display part 12, when the sounding body detection apparatus 1 which
concerns on 2nd Embodiment of this invention is a portable terminal, and the sounding body 2 is
a mosquito. It is a figure which shows the specific sound electric signal A31-A33 output from the
specific sound electric signal extraction filter 131-133 regarding the change of the sound volume
of the sounding body 2. FIG. It is a figure which shows the determination result signal B21-B23
output from the specific sound electric signal determination part 221-223 regarding the change
of the sound volume of the sounding body 2. FIG. It is a figure which shows arrival time
difference A41-A42 output from the signal time difference detection part 240 regarding the
change of the sound volume of the sounding body 2. FIG. It is a block diagram which shows the
structure of the sounding body detection apparatus 1 which concerns on 3rd Embodiment of this
invention. It is a figure which shows the information memorize | stored in the specific sound
electrical signal coordinate memory | storage part 310. FIG. It is a figure which shows a
coordinate construction process as operation | movement of the sounding body detection
apparatus 1 which concerns on 3rd Embodiment of this invention. It is a figure for demonstrating
coordinate construction processing. It is a figure which shows a coordinate detection process as
operation | movement of the sounding body detection apparatus 1 which concerns on 3rd
Embodiment of this invention.
[0025]
Hereinafter, an embodiment of a sound generator detection device according to the present
invention will be described with reference to the drawings.
[0026]
FIG. 1 is a block diagram showing a sounding body detection system to which the sounding body
detection device 1 of the present invention is applied.
The sounding body detection device 1 of the present invention detects a sounding body 2.
[0027]
03-05-2019
11
FIG. 2 is a block diagram showing the configuration of the sounding body detection device 1
according to the present invention. The sounding body detection device 1 according to the
present invention includes M microphones, a control device 10, a storage device 11, a display
unit 12, and a speaker 13. The storage device 11 stores a computer program that can be
executed by a computer. The control device 10 includes a CPU (Central Processing Unit) 14 that
reads and executes the computer program.
[0028]
FIG. 3 is a view showing an example to which the sound generator detection system of FIG. 1 is
applied. For example, the sounding body detection device 1 of the present invention is an image
forming device, and the sounding body 2 is a robot cleaner. The image forming apparatus and
the robot cleaner are provided in the office. The image forming apparatus includes an image
forming unit. The image forming unit forms an image based on input image data, and prints the
image on a sheet. The image forming apparatus has a function of detecting a robot cleaner, and
displays the position of the robot cleaner on the display unit 12.
[0029]
FIG. 4 is a view showing another example to which the sound generator detection system of FIG.
1 is applied. For example, the sound generator detection device 1 of the present invention is a
portable terminal, and the sound generator 2 is a mosquito. As a portable terminal, a mobile
telephone, a smart phone, etc. are illustrated. The portable terminal has a function of detecting a
mosquito, and displays the position of the mosquito on the display unit 12.
[0030]
[First Embodiment] FIG. 5 is a block diagram showing the configuration of a sounding body
detection apparatus 1 according to a first embodiment of the present invention.
[0031]
The control device 10 of the sounding body detection device 1 according to the first embodiment
of the present invention includes M signal conversion circuits, M specific sound electrical signal
extraction filters, a signal time difference detection unit 140, and a coordinate detection unit
03-05-2019
12
150. A distance calculation unit 160, a display control unit 170, a distance determination result
generation unit 180, an alarm notification unit 190, and a movement history storage unit 200
are provided.
These components are controlled by the CPU 14.
[0032]
In the sound generator detection device 1 according to the first embodiment of the present
invention, the above-described M is an integer of 3 or more. ここで、Mは3とする。 In this case,
the three microphones are microphones 111 to 113, the three signal conversion circuits are
signal conversion circuits 121 to 123, and the three specific sound electrical signal extraction
filters are specific sound electrical signal extraction filters 131 to 133. .
[0033]
The microphones 111 to 113 collect sounds A11 to A13 including specific sounds emitted by the
sound generator 2.
[0034]
The signal conversion circuits 121 to 123 synchronize with the clock signal CLK output from the
CPU 14 (for example, in synchronization with the rise of the clock signal CLK), and output the
sounds A11 to A13 output from the microphones 111 to 113 as electric signals A21. Convert to
~ A23.
FIG. 6 is a diagram showing the electrical signals A21 to A23 output from the signal conversion
circuits 121 to 123.
[0035]
The specific sound electrical signal extraction filters 131 to 133 receive the electrical signals
A21 to A23 output from the signal conversion circuits 121 to 123 in synchronization with the
03-05-2019
13
clock signal CLK output from the CPU 14. The specific sound electrical signal extraction filters
131 to 133 output the specific sound electrical signal obtained by extracting the frequency
component of the specific sound from the electrical signals A21 to A23 as the specific sound
electrical signal A31 to A33. FIG. 7 is a diagram showing specific sound electrical signals A31 to
A33 outputted from the specific sound electrical signal extraction filters 131 to 133. As shown in
FIG. The specific sound electrical signal A32 is delayed by a time T12 [s] relative to the specific
sound electrical signal A31. The specific sound electrical signal A33 is delayed by a time T13 [s]
relative to the specific sound electrical signal A31.
[0036]
Here, the specific sound electrical signals A31 to A33 previously output from the specific sound
electrical signal extraction filters 131 to 133 will be referred to as specific sound electrical
signals A31-1 to A33-1. The specific sound electrical signal A32-1 is delayed by a time T12-1 [s]
with respect to the specific sound electrical signal A31-1, and the specific sound electrical signal
A33-1 is a time T13-1 with respect to the specific sound electrical signal A31-1. It is delayed by
[s].
[0037]
Further, specific sound electrical signals A31 to A33 subsequently output from the specific sound
electrical signal extraction filters 131 to 133 will be referred to as specific sound electrical
signals A31-2 to A33-2. The specific sound electrical signal A32-2 is delayed by a time T12-2 [s]
relative to the specific sound electrical signal A31-2, and the specific sound electrical signal A332 is a time T13-2 relative to the specific sound electrical signal A31-2. It is delayed by [s].
[0038]
The signal time difference detection unit 140 receives the specific sound electrical signals A31 to
A33 output from the specific sound electrical signal extraction filters 131 to 133 in
synchronization with the clock signal CLK output from the CPU 14. The signal time difference
detection unit 140 calculates N arrival time differences which are differences between arrival
times of one specific sound electric signal and the other specific sound electric signals among the
specific sound electric signals A31 to A33.
03-05-2019
14
[0039]
N is an integer, in which case N is 2. Specifically, the signal time difference detection unit 140 is
a difference between arrival times of one specific sound electric signal A31 of the specific sound
electric signals A31 to A33 and the other specific sound electric signals A32 and A33. Two
arrival time differences A41 to A42 are calculated. FIG. 8 is a diagram showing arrival time
differences A41 to A42 output from the signal time difference detection unit 140. As shown in
FIG. The arrival time differences A41 to A42 are represented by T12 and T13 [s], respectively.
[0040]
Here, in accordance with the specific sound electrical signals A31 to A33 previously output from
the specific sound electrical signal extraction filters 131 to 133, the arrival time differences A41
to A42 previously output from the signal time difference detection unit 140 are designated as
arrival time differences A41-1, It is referred to as A42-1. The arrival time difference A41-1
represents time T12-1 [s], and the arrival time difference A42-1 represents time T13-1 [s].
[0041]
Further, the arrival time differences A41 to A42 subsequently output from the signal time
difference detection unit 140 in accordance with the specific sound electric signals A31-2 to
A33-2 subsequently output from the specific sound electric signal extraction filters 131 to 133
are arrival time differences A41. -2, referred to as A42-2. The arrival time difference A41-2
represents time T12-2 [s], and the arrival time difference A42-2 represents time T13-2 [s].
[0042]
The coordinate detection unit 150 receives arrival time differences A 41-1 and A 42-1 previously
output from the signal time difference detection unit 140 in synchronization with the clock signal
CLK output from the CPU 14. The coordinate detection unit 150 detects a sounding body
coordinate A50, which is a coordinate of the sounding body 2 at the previous time, based on the
coordinates representing the installation positions of the microphones 111 to 113 and the arrival
time differences A41-1 and A42-1. Here, the sounding body coordinates A50 which are the
03-05-2019
15
coordinates of the sounding body 2 of the previous time are referred to as the previous sounding
body coordinates A50-1.
[0043]
The coordinate detection unit 150 also receives arrival time differences A41-2 and A42-2
subsequently output from the signal time difference detection unit 140 in synchronization with
the clock signal CLK output from the CPU 14. The coordinate detection unit 150 detects a
sounding body coordinate A50 which is a coordinate of the sounding body 2 based on the
coordinates indicating the installation position of the microphones 111 to 113 and the arrival
time differences A41-2 and A42-2. Here, the sounding body coordinates A50 which are the
coordinates of the sounding body 2 of this time are referred to as sounding body coordinates
A50-2 of this time.
[0044]
Here, a method of detecting the sounding body coordinates A50 (previous sounding body
coordinates A50-1, current sounding body coordinates A50-2) will be described.
[0045]
FIG. 9 is a diagram showing coordinates representing installation positions of the microphones
111 to 113. As shown in FIG.
Here, the coordinates of the microphones 111 to 113 are (0, 0), (X112, 0), (0, Y113), the arrival
time differences A41 to A42 are T12, T13 [s], and the speed of sound is 340 [m / s ], (X50, Y50)
representing the sounding body coordinates A50 can be obtained by hyperbola L12, L13.
[0046]
The hyperbola L12 is determined based on (0, 0), (X112, 0) which are the coordinates of the
microphones 111 and 112, and T12 which is the arrival time difference A41, and ± SQR
{(X−X112) ^ 2 + Y ^ 2 } = ± SQR {X ^ 2 + Y ^ 2} + 340 × T12. The hyperbola L13 is determined
based on (0, 0), (0, Y113) which are the coordinates of the microphones 111 and 113, and T13
03-05-2019
16
which is the arrival time difference A42, and ± SQR {X ^ 2 + (Y-Y113) ^ 2} = ± SQR {X ^ 2 + Y ^
2} + 340 × T13. The intersection of hyperbola L12 and hyperbola L13 represents the position of
the sound source. That is, it represents the sound generator coordinates A50.
[0047]
Since the coordinates of the microphones 111 to 113 and the sound velocity are invariable,
coordinates (X50, Y50) for two time differences may be calculated in advance based on the
equations of hyperbola L12 and L13. FIG. 10 is a block diagram showing the configuration of the
coordinate detection unit 150. As shown in FIG. The coordinate detection unit 150 includes a
time difference coordinate storage unit 151 and a coordinate selection unit 152.
[0048]
FIG. 11 is a diagram showing the information stored in the time difference coordinate storage
unit 151. As shown in FIG. The time difference coordinate storage unit 151 stores N time
differences and the coordinates of the sounding body 2 in association with a plurality of patterns.
Since N is 2, in the time difference coordinate storage unit 151, a plurality of two time
differences are stored. The two time differences are preset. First, the coordinate selection unit
152 refers to the time difference coordinate storage unit 151. The coordinate selection unit 152
selects, from among the time differences of the plurality of patterns stored in the time difference
coordinate storage unit 151, a time difference that matches the arrival time differences A41 to
A42 as a selection time difference. Next, the coordinate selection unit 152 selects coordinates
corresponding to the selected time difference from among the coordinates of the plurality of
patterns stored in the time difference coordinate storage unit 151 as the sounding body
coordinates A50.
[0049]
The distance calculation unit 160 inputs the sounding body coordinates A 50 output from the
coordinate detection unit 150 in synchronization with the clock signal CLK output from the CPU
14. The distance calculation unit 160 is, for example, coordinates representing the installation
position of at least one of the microphones 111 to 113 and the present sounding object
coordinates A50-2 output from the coordinate detection unit 150 (X50, Y50). The distance
between the at least one microphone and the sounding body 2 is calculated based on and output
03-05-2019
17
as the calculated distance A60. Here, assuming that the coordinates of the microphones 111 to
113 are (0, 0), (X112, 0), (0, Y113) and the sounding body coordinates A50 are (X50, Y50), the
microphones 111 to 113 and the sounding body The distances S1 to S3 [m] to 2 are respectively
X ^ 2 + Y ^ 2 = S1 ^ 2, (X-X112) ^ 2 + Y ^ 2 = S2 ^ 2, X ^ 2 + (Y-Y113) ^ 2 = S3. It is obtained by
^ 2.
[0050]
For example, when the distance calculation unit 160 calculates the distance between the
microphone 111 and the sounding body 2, the coordinates (0, 0) of the microphone 111 and the
current sounding body coordinates (X ^ 2 + Y ^ 2 = S1 ^ 2) A calculated distance A60 based on
(X50, Y50) is output.
[0051]
The display control unit 170 inputs the sound generator coordinates A 50 output from the
coordinate detection unit 150 in synchronization with the clock signal CLK output from the CPU
14.
The display control unit 170 sets the sounding body coordinates A50 (previous sounding body
coordinates A50-1, current sounding body coordinates A50-2) output from the coordinate
detection unit 150, and the calculated distance A60 output from the distance calculation unit
160. The image data A70 including the sound generator moving path A100 is generated, and the
image data A70 is displayed on the display unit 12. The present sounding body coordinates A502 included in the image data A70 represent the position of the present sounding body 2.
[0052]
For example, when the sounding body detection device 1 according to the first embodiment of
the present invention is an image forming device and the sounding body 2 is a robot cleaner and
both are provided in an office, the storage device 11 is an office. Contains information about the
layout of the. In this case, the display control unit 170 displays the image data A70 as shown in
FIG. 12 on the display unit 12 in association with the layout of the office.
[0053]
03-05-2019
18
For example, when the sound generator detection device 1 according to the first embodiment of
the present invention is a portable terminal and the sound generator 2 is a mosquito, the display
control unit 170 displays image data A70 as shown in FIG. Display on 12
[0054]
The movement history storage unit 200 stores the sounding object coordinates A50-1 as the
sounding object movement history, which is a history when the sounding object 2 moved.
The sounding object movement route A100 included in the image data A70 is a line connecting
the present sounding object coordinates A50-2 and the sounding object movement history
including the previous sounding object coordinates A50-1 stored in the movement history
storage unit 200. expressed. The sound generator moving path A100 included in the image data
A70 is displayed in a display form different from the sound generator coordinates A50-2.
Examples of the display form of the sound generator moving path A100 include color
classification, highlight, and a line representing a trace. For example, when it is a line
representing a trace, it is written as shown in FIG. 12 and FIG.
[0055]
The distance determination result generation unit 180 receives the calculated distance A60
output from the distance calculation unit 160 in synchronization with the clock signal CLK
output from the CPU 14. The distance determination result generation unit 180 generates a
distance determination result A80 indicating whether the calculated distance A60 is included in
the set distance range.
[0056]
The alarm notification unit 190 receives the distance determination result A80 in
synchronization with the clock signal CLK output from the CPU 14. The alarm notification unit
190 outputs an alarm A90 from the speaker 13 based on the distance determination result A80.
The type of the alarm A 90 differs depending on the set distance range, and is managed, for
example, by an alarm setting table stored in the storage device 11. The distance determination
result generation unit 180 and the alarm notification unit 190 refer to the alarm setting table.
03-05-2019
19
The alarm setting table stores the set distance range and the type of the alarm A 90 in
association with a plurality of patterns.
[0057]
FIG. 14 is a diagram showing an alarm setting table applied when the sounding body detection
device 1 according to the first embodiment of the present invention is an image forming device
and the sounding body 2 is a robot cleaner.
[0058]
For example, when the calculated distance A60 is within 10 m (when the robot vacuum cleaner is
within 10 m), the distance determination result generation unit 180 does not include the
calculated distance A60 in the set distance range. To generate a distance determination result
A80 representing that.
The alarm notification unit 190 does not output the alarm A90 from the speaker 13 because
there is no type of alarm corresponding to the distance determination result A80.
[0059]
For example, when the calculated distance A60 is 10 [m] or more and 11 [m] or less (when the
robot vacuum cleaner is 10 [m] or more and 11 [m] or less), the distance determination result
generation unit 180 A distance determination result A80 representing that the calculated
distance A60 is included in the first set distance range is generated. Since the alarm type
corresponding to the distance determination result A80 is the first alarm sound, the alarm
notification unit 190 outputs an alarm A90 representing the first alarm sound from the speaker
13.
[0060]
For example, when the calculated distance A60 is 11 [m] or more and 12 [m] or less (when the
robot vacuum cleaner is 11 [m] or more and 12 [m] or less), the distance determination result
generation unit 180 A distance determination result A80 representing that the calculated
03-05-2019
20
distance A60 is included in the second set distance range is generated. Since the type of the
alarm corresponding to the distance determination result A80 is the second alarm sound, the
alarm notification unit 190 outputs an alarm A90 representing the second alarm sound from the
speaker 13. The second alarm sound is a sound larger than the first alarm sound.
[0061]
FIG. 15 is a diagram showing an alarm setting table applied when the sound generator detection
device 1 according to the first embodiment of the present invention is a portable terminal and
the sound generator 2 is a mosquito.
[0062]
For example, when the calculated distance A60 is 2 [m] or more (when a mosquito is present in 2
[m] or more), the distance determination result generation unit 180 determines that the
calculated distance A60 is not included in the set distance range. A distance determination result
A80 is generated.
The alarm notification unit 190 does not output the alarm A90 from the speaker 13 because
there is no type of alarm corresponding to the distance determination result A80.
[0063]
For example, when the calculated distance A60 is 1 m or more and 2 m or less (when the
mosquito is 1 m or more and 2 m or less), the distance determination result generation unit 180
calculates the distance A distance determination result A80 indicating that A60 is included in the
second set distance range is generated. Since the type of the alarm corresponding to the distance
determination result A80 is the second alarm sound, the alarm notification unit 190 outputs an
alarm A90 representing the second alarm sound from the speaker 13.
[0064]
For example, when the calculated distance A60 is within 1 m (when the mosquito is within 1 m),
the distance determination result generation unit 180 includes the calculated distance A60 in the
03-05-2019
21
first set distance range. To generate a distance determination result A80 representing that. Since
the alarm type corresponding to the distance determination result A80 is the first alarm sound,
the alarm notification unit 190 outputs an alarm A90 representing the first alarm sound from the
speaker 13. The first alarm sound is a sound larger than the second alarm sound.
[0065]
As described above, in the sound generator detection device 1 according to the first embodiment
of the present invention, M (M is an integer of 3 or more) microphones 111 to 113 collect the
sounds A11 to A13, and the signal conversion circuit 121 To 123 convert the sounds A11 to
A13 output from the M microphones 111 to 113 into electric signals A21 to A23. The specific
sound electrical signal extraction filters 131 to 133 are specified by extracting the frequency
component of the specific sound which is the sound emitted by the moving sounding body 2
from the M electric signals A21 to A23 output from the signal conversion circuits 121 to 123.
Sound electric signals A31 to A33 (A31-1 to A33-1) (A31-2 to A33-2) are output. Among the M
specific sound electrical signals A31 to A33 (A31-1 to A33-1) (A31-2 to A33-2) output from the
specific sound electrical signal extraction filters 131 to 133, the signal time difference detection
unit 140 And one specific sound electrical signal A31 (A31-1) (A31-2) and the other specific
sound electrical signals A32 to A33 (A32-1 to A33-1) (A32-2 to A33-2) N (N is an integer) arrival
time differences A 41 to A 42 (A 41-1 to A 42-1) (A 41-2 to A 42-2), which are differences
between the arrival times of A. The coordinate detection unit 150 outputs the coordinates {(0, 0),
(X112, 0), (0, Y113)} representing the installation positions of the M microphones 111 to 113
and the signal time difference detection unit 140 as a preceding output. Based on the N arrival
time differences A41-1 to A42-1, the previous sounding body coordinates A50 (A50-1), which
are the coordinates of the previous sounding body 2, are detected. The coordinate detection unit
150 determines the coordinates {(0, 0), (X112, 0), (0, Y113)} of the M microphones 111 to 113
and N arrivals subsequently output from the signal time difference detection unit 140 Based on
the time differences A41-2 to A42-2, the present sounding body coordinates A50 (A50-2), which
are the coordinates of the present sounding body 2, are detected.
[0066]
Further, in the sounding body detection device 1 according to the first embodiment of the
present invention, the coordinate detection unit 150 refers to the time difference coordinate
storage unit 151 that associates the N time differences and the coordinates of the sounding body
2 with a plurality of patterns. Among the coordinates of the plurality of patterns stored in the
coordinate storage unit 151, the coordinates corresponding to the N arrival time differences A41
to A42 are selected as the coordinates of the sounding body 2.
03-05-2019
22
[0067]
As described above, according to the sound generator detection device 1 according to the first
embodiment of the present invention, the sounds A11 to A13 output from the microphones 111
to 113 to the signal conversion circuits 121 to 123 and the specific sound electrical signal
extraction filter 131 to The specific sound (specific sound electrical signal A31 to A33) is
specified by 133, and the arrival time difference A41 to A42 of the specific sound is calculated
by the signal time difference detection unit 140, whereby the position of the sounding body 2 by
the coordinate detection unit 150 (sound generator Coordinates A50) can be identified.
Furthermore, according to the sound generator detection device 1 according to the first
embodiment of the present invention, the specific sound (specific sound electric signals A31-1 to
A33-1) previously output from the specific sound electric signal extraction filters 131 to 133 is
output. On the other hand, the specific sound (specific sound electrical signal A31-2 to A33-)
specified after the previous position of the sounding body 2 (previous sounding body coordinate
A50-1) is specified and subsequently output from the specific sound electrical signal extraction
filters 131 to 133. In contrast to the technique disclosed in Non-Patent Document 1 and Patent
Document 1, moving sound-generating body 2 is different from 2) by specifying the position of
current sound-producing body 2 (current sound-generating body coordinates A50-2). The
position of can be identified in real time.
[0068]
Further, in the sound generation body detection device 1 according to the first embodiment of
the present invention, the display unit 12 displays the image data A70 including the previous
sound generation body coordinates A50-1 and the current sound generation body coordinates
A50-2.
[0069]
Moreover, in the sounding body detection device 1 according to the first embodiment of the
present invention, the movement history storage unit 200 stores the previous sounding body
coordinates A50-1.
The image data A70 further includes a sound producing body movement path A100 connecting
03-05-2019
23
the present sounding body coordinates A50-2 and the sounding body movement history
including the previous sounding body coordinates A50-1 stored in the movement history storage
unit 200.
[0070]
As described above, according to the sounding body detection device 1 according to the first
embodiment of the present invention, the position of the sounding body 2 moving is real-timed to
the user by displaying the image data A 70 on the display unit 12. Can be notified. Furthermore,
the user can grasp the sound generator moving path A100 by the image data A70 displayed on
the display unit 12.
[0071]
Further, in the sound generator detection device 1 according to the first embodiment of the
present invention, the distance calculation unit 160 indicates coordinates {(0, 0) representing the
installation position of at least one of the M microphones 111 to 113. The distance between at
least one microphone and the sounding body 2 is calculated as the calculated distance A60 based
on the coordinates of the sounding body 2 and the coordinates A50 of the sounding body 2.
[0072]
Further, in the sound producing body detection device 1 according to the first embodiment of the
present invention, the distance determination result generation unit 180 generates a distance
determination result A80 indicating whether the calculated distance A60 is included in the set
distance range.
The alarm notification unit 190 outputs an alarm A90 based on the distance determination result
A80.
[0073]
Moreover, in the sounding body detection device 1 according to the first embodiment of the
present invention, a plurality of set distance ranges are set, and the type of the alarm A 90 is
different for each set distance range.
03-05-2019
24
[0074]
As described above, according to the sounding body detection device 1 according to the first
embodiment of the present invention, it is possible to understand how far the sounding body 2 is
separated from the sounding body detection device 1 by calculating the calculated distance A60.
Can.
By displaying the calculated distance A60 on the display unit 12, it is possible to notify the user
in real time. Further, by outputting the alarm A90 based on the calculated distance A60, it is
possible to notify the user in real time that the moving sounding body 2 is moving or
approaching.
[0075]
Second Embodiment FIG. 16 is a block diagram showing the configuration of a sounding body
detection apparatus 1 according to a second embodiment of the present invention. In the second
embodiment, only the changes from the first embodiment will be described.
[0076]
The control device 10 of the sound generator detection device 1 according to the second
embodiment of the present invention includes M signal conversion circuits, M specific sound
electrical signal extraction filters, and M specific sound electrical signal determination units.
Specific sound electrical signal storage unit for determination 210, signal time difference
detection unit 240, coordinate detection unit 150, distance calculation unit 160, display control
unit 170, distance determination result generation unit 180, alarm notification unit 190, The
movement history storage unit 200 is provided. These components are controlled by the CPU 14.
[0077]
In the sound generator detection device 1 according to the second embodiment of the present
03-05-2019
25
invention, the above-described M is an integer of 3 or more. ここで、Mは3とする。 In this case,
the three microphones are microphones 111 to 113, the three signal conversion circuits are
signal conversion circuits 121 to 123, and the three specific sound electrical signal extraction
filters are specific sound electrical signal extraction filters 131 to 133. .
[0078]
The microphones 111 to 113, the signal conversion circuits 121 to 123, and the specific sound
electrical signal extraction filters 131 to 133 are the same as those in the first embodiment, and
thus the description thereof will be omitted.
[0079]
As mentioned above, M is three.
In this case, the three specific sound electrical signal determination units are specified sound
electrical signal determination units 221 to 223.
[0080]
The determination specific sound electrical signal storage unit 210 stores a determination
specific sound voltage value (feature amount).
[0081]
The specific sound electrical signal determination units 221 to 223 are output from the specific
sound electrical signal extraction filters 131 to 133 in synchronization with the clock signal CLK
output from the CPU 14 (for example, in synchronization with the rising of the clock signal CLK).
Specific sound electrical signals A31 to A33 are input.
The specific sound electrical signal determination units 221 to 223 determine the determination
result signal B21 when the voltage value of the specific sound electrical signals A31 to A33 is
equal to or higher than the determination specific sound voltage value stored in the
determination specific sound electrical signal storage unit 210. Output ~ B23.
03-05-2019
26
[0082]
The signal time difference detection unit 240 receives the determination result signals B21 to
B23 output from the specific sound electrical signal determination units 221 to 223 in
synchronization with the clock signal CLK output from the CPU 14. The signal time difference
detection unit 240 calculates N arrival time differences that are differences between arrival times
of one of the determination result signals B21 to B23 and the other determination result signals.
[0083]
N is an integer, in which case N is 2. Specifically, the signal time difference detection unit 240
determines two of the determination result signals B21 to B23 as the difference between the
arrival times of one determination result signal B21 and the other determination result signals
B21 and B23. The arrival time differences A41 to A42 are calculated.
[0084]
The specific sound electrical signal storage unit for determination 210, the specific sound
electrical signal determination units 221 to 223, and the signal time difference detection unit
240 will be specifically described.
[0085]
FIG. 17 shows the relationship between the determination specific sound voltage value stored in
the determination specific sound electrical signal storage unit 210 and the determination result
signal (voltage value) output from the specific sound electrical signal determination units 221 to
223. FIG.
For example, the determination result signals B21 to B23 are set to the maximum value of the
voltage value of the determination specific sound electrical signal. For example, when the voltage
value of the specific sound electrical signals A31-1 to A33-1 is 9 [mV] or less, it is assumed that
the sounding body 2 does not exist nearby, and the determination result signals B21 to B23 are
not output.
03-05-2019
27
[0086]
First, the case where the sound generator detection device 1 according to the second
embodiment of the present invention detects the presence or absence of a specific sound (the
case where the sound generator 2 repeats movement and stop) will be described.
[0087]
FIG. 18 is a diagram showing specific sound electrical signals A31 to A33 output from the
specific sound electrical signal extraction filters 131 to 133 regarding the presence or absence of
the specific sound.
FIG. 19 is a diagram showing determination result signals B21 to B23 output from the specific
sound electrical signal determination units 221 to 223 regarding the presence or absence of the
specific sound. FIG. 20 is a diagram showing arrival time differences A41 to A42 output from the
signal time difference detection unit 240 regarding the presence or absence of a specific sound.
[0088]
Specific sound electrical signals A31-1 to A33-1 are preceded and output from the specific sound
electrical signal extraction filters 131 to 133. At this time, the specific sound electrical signal
determination units 221 to 223 refer to the determination specific sound electrical signal storage
unit 210 in synchronization with the clock signal CLK output from the CPU 14. Here, the voltage
values of the specific sound electrical signals A31-1 to A33-1 are equal to or higher than the
specific sound voltage value for determination stored in the specific sound electrical signal
storage unit 210 for determination (for example, 10 [mV]). That is, the sounding body 2 is
moving and approaching. In this case, the specific sound electrical signal determination units
221 to 223 output the preceding determination result signals B21 to B23 as the determination
result signals B21-1 to B23-1. The signal time difference detection unit 240 synchronizes with
the clock signal CLK output from the CPU 14 and determines one of the determination result
signals B21-1 and other determination result signals among the determination result signals
B21-1 to B23-1. Attainment time differences A41-1 and A42-1, which are differences between
arrival times with B21-1 and B23-1, are calculated. The coordinate detection unit 150 detects the
positions of the microphones 111 to 113 in synchronization with the clock signal CLK output
from the CPU 14 and the coordinates of the sounding body 2 based on the arrival time
differences A41-1 and A42-1. A certain sounding body coordinate A50-1 is detected.
03-05-2019
28
[0089]
Next, after the specific sound electrical signals A 31-1 to A 33-1 are previously output from the
specific sound electrical signal extraction filters 131 to 133, a little time passes. That is, the
sounding body 2 has not moved.
[0090]
Thereafter, the specific sound electrical signals A31-2 to A33-2 are subsequently output from the
specific sound electrical signal extraction filters 131 to 133. At this time, the specific sound
electrical signal determination units 221 to 223 refer to the determination specific sound
electrical signal storage unit 210 in synchronization with the clock signal CLK output from the
CPU 14. Here, the voltage value of the specific sound electrical signal A31-2 to A33-2 is equal to
or higher than the specific sound voltage value for determination stored in the specific sound
electrical signal storage unit 210 for determination (for example, 10 [mV]). That is, the sounding
body 2 is moving and approaching. In this case, the specific sound electrical signal determination
units 221 to 223 output the current determination result signals B21 to B23 as the
determination result signals B21-2 to B23-2. The signal time difference detection unit 240
synchronizes with the clock signal CLK output from the CPU 14 and determines one of the
determination result signals B21-2 and other determination result signals among the
determination result signals B21-2 to B23-2. Arrival time differences A41-2 and A42-2 which are
differences between arrival times with B21-2 and B23-2 are calculated. The coordinate detection
unit 150 detects the positions of the microphones 111 to 113 in synchronization with the clock
signal CLK output from the CPU 14 and the coordinates of the sounding body 2 based on the
arrival time differences A41-2 and A42-2. A certain sounding body coordinate A50-2 is detected.
[0091]
The display control unit 170 synchronizes with the sound signal coordinates A50 (previous
sounding object coordinates A50-1, current sounding object coordinates A50-2) output from the
coordinate detection unit 150 in synchronization with the clock signal CLK output from the CPU
14; The image data A70 including the calculated distance A60 output from the distance
calculation unit 160 and the sound generator moving path A100 is generated, and the image
data A70 as shown in FIG. 21 or 22 is displayed on the display unit 12. The distance calculation
03-05-2019
29
unit 160, the display control unit 170, the distance determination result generation unit 180, the
alarm notification unit 190, and the movement history storage unit 200 are the same as in the
first embodiment, and thus the description thereof is omitted.
[0092]
Next, a case where the sound generator detection device 1 according to the second embodiment
of the present invention detects a change in volume of a specific sound (when the sound
generator 2 approaches by movement) will be described.
[0093]
FIG. 23 is a diagram showing the specific sound electrical signals A31 to A33 output from the
specific sound electrical signal extraction filters 131 to 133 with respect to the change of the
volume of the sounding body 2.
FIG. 24 is a diagram showing the determination result signals B21 to B23 output from the
specific sound electrical signal determination units 221 to 223 regarding the change of the
volume of the sounding body 2. FIG. 25 is a diagram showing arrival time differences A41 to A42
output from the signal time difference detection unit 240 with respect to changes in the volume
of the sounding body 2.
[0094]
Specific sound electrical signals A31-1 to A33-1 are preceded and output from the specific sound
electrical signal extraction filters 131 to 133. At this time, the specific sound electrical signal
determination units 221 to 223 refer to the determination specific sound electrical signal storage
unit 210 in synchronization with the clock signal CLK output from the CPU 14. Here, the voltage
values of the specific sound electrical signals A31-1 to A33-1 are equal to or higher than the
specific sound voltage value for determination stored in the specific sound electrical signal
storage unit 210 for determination (for example, 10 [mV]). That is, the sounding body 2 is
moving and approaching. In this case, the specific sound electrical signal determination units
221 to 223 output the preceding determination result signals B21 to B23 as the determination
result signals B21-1 to B23-1. The signal time difference detection unit 240 synchronizes with
the clock signal CLK output from the CPU 14 and determines one of the determination result
signals B21-1 and other determination result signals among the determination result signals
03-05-2019
30
B21-1 to B23-1. Attainment time differences A41-1 and A42-1, which are differences between
arrival times with B21-1 and B23-1, are calculated. The coordinate detection unit 150 detects the
positions of the microphones 111 to 113 in synchronization with the clock signal CLK output
from the CPU 14 and the coordinates of the sounding body 2 based on the arrival time
differences A41-1 and A42-1. A certain sounding body coordinate A50-1 is detected.
[0095]
Next, the specific sound electrical signals A31-2 to A33-2 are subsequently output from the
specific sound electrical signal extraction filters 131 to 133. At this time, the specific sound
electrical signal determination units 221 to 223 refer to the determination specific sound
electrical signal storage unit 210 in synchronization with the clock signal CLK output from the
CPU 14. Here, the voltage value of the specific sound electrical signal A31-2 to A33-2 is equal to
or higher than the specific sound voltage value for determination stored in the specific sound
electrical signal storage unit 210 for determination (for example, 12 [mV]). That is, the sounding
body 2 is moving and approaching further. Further, the voltage values of the specific sound
electrical signals A31-2 to A33-2 are larger than the voltage values of the specific sound
electrical signals A31-1 to A33-1. That is, it is changing with respect to the voltage value of the
specific sound electrical signals A31-1 to A33-1. In this case, the specific sound electrical signal
determination units 221 to 223 output the current determination result signals B21 to B23 as
the determination result signals B21-2 to B23-2. The signal time difference detection unit 240
synchronizes with the clock signal CLK output from the CPU 14 and determines one of the
determination result signals B21-2 and other determination result signals among the
determination result signals B21-2 to B23-2. Arrival time differences A41-2 and A42-2 which are
differences between arrival times with B21-2 and B23-2 are calculated. The coordinate detection
unit 150 detects the positions of the microphones 111 to 113 in synchronization with the clock
signal CLK output from the CPU 14 and the coordinates of the sounding body 2 based on the
arrival time differences A41-2 and A42-2. A certain sounding body coordinate A50-2 is detected.
[0096]
The display control unit 170 synchronizes with the sound signal coordinates A50 (previous
sounding object coordinates A50-1, current sounding object coordinates A50-2) output from the
coordinate detection unit 150 in synchronization with the clock signal CLK output from the CPU
14; The image data A70 including the calculated distance A60 output from the distance
calculation unit 160 and the sound generator moving path A100 is generated, and the image
data A70 is displayed on the display unit 12 (see FIGS. 12 and 13). The distance calculation unit
03-05-2019
31
160, the display control unit 170, the distance determination result generation unit 180, the
alarm notification unit 190, and the movement history storage unit 200 are the same as in the
first embodiment, and thus the description thereof is omitted.
[0097]
As described above, in the sound generator detection device 1 according to the second
embodiment of the present invention, M (M is an integer of 3 or more) microphones 111 to 113
collect the sounds A11 to A13, and the signal conversion circuit 121 To 123 convert the sounds
A11 to A13 output from the M microphones 111 to 113 into electric signals A21 to A23. The
specific sound electrical signal extraction filters 131 to 133 are specified by extracting the
frequency component of the specific sound which is the sound emitted by the moving sounding
body 2 from the M electric signals A21 to A23 output from the signal conversion circuits 121 to
123. Sound electric signals A31 to A33 (A31-1 to A33-1) (A31-2 to A33-2) are output. The
specific sound electrical signal determination units 221 to 223 are configured to output M
specific sound electrical signals A31 to A33 (A31-1 to A33-1) (A31-2 to A33-) output from the
specific sound electrical signal extraction filters 131 to 133. When the voltage value of 2) is
more than the specific sound voltage value for determination, determination result signals B21 to
B23 (B21-1 to B23-1) (B21-2 to B23-2) are output. The signal time difference detection unit 240
is one of the M determination result signals B21 to B23 (B21-1 to B23-1) (B21-2 to B23-2)
output from the specific sound electrical signal determination units 221 to 223. And the arrival
time of one determination result signal B21 (B21-1) (B21-2) and the other determination result
signals B22 to B23 (B22-1 to B23-1) (B22-2 to B23-2) The arrival time differences A41 to A42
(A41-1 to A42-1) (A41-2 to A42-2) of N (N is an integer) which are the differences between the
above are sequentially calculated. The coordinate detection unit 150 outputs the coordinates {(0,
0), (X112, 0), (0, Y113)} representing the installation positions of the M microphones 111 to 113
and the signal time difference detection unit 240 in advance. Based on the N arrival time
differences A41-1 to A42-1, the previous sounding body coordinates A50 (A50-1), which are the
coordinates of the previous sounding body 2, are detected. The coordinate detection unit 150
detects the coordinates {(0, 0), (X112, 0), (0, Y113)} of the M microphones 111 to 113 and N
arrivals subsequently output from the signal time difference detection unit 240. Based on the
time differences A41-2 to A42-2, the present sounding body coordinates A50 (A50-2), which are
the coordinates of the present sounding body 2, are detected.
[0098]
Further, in the sound generator detection device 1 according to the second embodiment of the
03-05-2019
32
present invention, the specific sound electrical signal determination units 221 to 223 are the M
specific sound electrical signals previously output from the specific sound electrical signal
extraction filters 131 to 133. When the voltage value of A31 to A33 is equal to or higher than
the specific sound voltage value for determination, the preceding M determination result signals
B21-1 to B23-1 are output to the time difference detection unit 240. In the specific sound
electrical signal determination units 221 to 223, voltage values of M specific sound electrical
signals A31 to A33 subsequently output from the specific sound electrical signal extraction
filters 131 to 133 are equal to or higher than the determination specific sound voltage value, and
When the voltage value is changing with respect to the voltage value of the preceding specific
sound electrical signal, the subsequent M judgment result signals (B21-2 to B23-2) are output.
[0099]
As described above, according to the sound generator detection device 1 according to the second
embodiment of the present invention, the sounds A11 to A13 output from the microphones 111
to 113 to the signal conversion circuits 121 to 123 and the specific sound electrical signal
extraction filter 131 to A specific sound (specific sound electrical signal A31 to A33) is specified
by 133, and a specific sound (voltage value) is higher than the feature amount (specific sound
voltage value for determination) by the specific sound electrical signal determination units 221
to 223 (determination result Specifying the signals B21 to B23) and calculating the arrival time
differences A41 to A42 of the specific sound by the signal time difference detection unit 240, so
that the position of the sounding body 2 (sounding object coordinates A50) is specified by the
coordinate detection unit 150 it can. Furthermore, according to the sound generator detection
device 1 according to the second embodiment of the present invention, the specific sound
electrical signal extraction filters 131 to 133 are preceded and the volume (voltage value) is the
feature amount (specific sound for determination For the specific sound (specific sound electrical
signal A31-1 to A33-1) that is higher than the voltage value, specify the previous position of the
sounding body 2 (previous sounding body coordinate A50-1), and extract the specific sound
electric signal For a specific sound (specific sound electrical signal A31-2 to A33-2) that is
subsequently output from the filters 131 to 133 and whose volume (voltage value) is equal to or
higher than the feature amount (specific sound voltage value for determination), Unlike the
technique disclosed in Non-Patent Document 1 and Patent Document 1, by specifying the
position of the present sounding body 2 (current sounding body coordinates A50-2), the position
of the moving sounding body 2 is specified in real time can do.
[0100]
03-05-2019
33
Third Embodiment FIG. 26 is a block diagram showing a configuration of a sounding body
detection device 1 according to a third embodiment of the present invention. In the third
embodiment, only the changes from the first embodiment will be described.
[0101]
The control device 10 of the sound generator detection device 1 according to the third
embodiment of the present invention includes M signal conversion circuits, M specific sound
electrical signal extraction filters, a specific sound electrical signal coordinate storage unit 310,
coordinates A detection unit 320, a coordinate construction unit 330, a distance calculation unit
160, a display control unit 170, a distance determination result generation unit 180, an alarm
notification unit 190, and a movement history storage unit 200 are provided. These components
are controlled by the CPU 14.
[0102]
In the sound generator detection device 1 according to the third embodiment of the present
invention, the above-described M is an integer of 2 or more. ここで、Mは3とする。 In this case,
the three microphones are microphones 111 to 113, the three signal conversion circuits are
signal conversion circuits 121 to 123, and the three specific sound electrical signal extraction
filters are specific sound electrical signal extraction filters 131 to 133. .
[0103]
The microphones 111 to 113, the signal conversion circuits 121 to 123, and the specific sound
electrical signal extraction filters 131 to 133 are the same as those in the first embodiment, and
thus the description thereof will be omitted.
[0104]
The construction control signal C31 is supplied to the coordinate construction unit 330.
If the signal level of the construction control signal C31 is high, the coordinate construction unit
330 constructs the specific sound electrical signal coordinate storage unit 310.
03-05-2019
34
[0105]
FIG. 27 is a diagram showing the information stored in the specific sound electrical signal
coordinate storage unit 310. As shown in FIG. The specific sound electrical signal coordinate
storage unit 310 stores M specific sound voltage values and the coordinates of the sound
generator 2 in association with a plurality of patterns. Since M is 3, the specific sound electrical
signal coordinate storage unit 310 stores a plurality of patterns of three specific sound voltage
values. The three specific sound voltage values represent the magnitude of the specific sound and
are preset.
[0106]
The coordinate detection unit 320 is supplied with a detection control signal C32. The signal
level of the detection control signal C32 is set reverse to the signal level of the construction
control signal C31. When the signal level of the detection control signal C32 is high, the
coordinate detection unit 320 detects the coordinates of the sounding body 2 with reference to
the specific sound electrical signal coordinate storage unit 310.
[0107]
In this case, the coordinate detection unit 320 outputs the specific sound electrical signal A31
output from the specific sound electrical signal extraction filters 131 to 133 among the specific
sound voltage values of the plurality of patterns stored in the specific sound electrical signal
coordinate storage unit 310. A voltage value matching the voltage value of ~ A33 is selected as
the selected specific sound voltage value. Next, among the coordinates of the plurality of patterns
stored in the specific sound electrical signal coordinate storage unit 310, the coordinate
detection unit 320 sets the coordinates corresponding to the selected specific sound voltage
value to the sounding body coordinates which are the coordinates of the sounding body 2. Select
as A50.
[0108]
The specific sound electrical signal coordinate storage unit 310 and the coordinate detection unit
320 will be specifically described.
03-05-2019
35
[0109]
FIG. 28 is a diagram showing coordinate construction processing as an operation of the sound
generation body detection device 1 according to the third embodiment of the present invention.
The construction of the specific sound electrical signal coordinate storage unit 310 is performed,
for example, by workers of a manufacturer or a sales maker before shipment. Alternatively, it
may be performed by the user after shipment.
[0110]
The worker sets the signal level of the detection control signal C32 to low level "L" and sets the
signal level of the construction control signal C31 to high level "H". When the construction
control signal C31 is at a high level, the worker stores the sounding object coordinates A50 (X50,
Y50) to be measured in the specific sound electrical signal coordinate storage unit 310 via the
coordinate construction unit 330.
[0111]
Next, the worker measures the specific sound in advance for each distance. In this case, as shown
in FIG. 29, the coordinates {(0, 0), (X112, 0), (0, Y113)} of the microphones 111 to 113 remain
unchanged, and the sound generator coordinates A50 (X50, Y50) Sounds A11 to A13 including
specific sounds emitted by the sounding body 2 are collected by the microphones 111 to 113
while changing them arbitrarily.
[0112]
At this time, the signal conversion circuits 121 to 123 synchronize with the clock signal CLK
output from the CPU 14 (for example, in synchronization with the rising of the clock signal CLK),
and output the sounds A11 to A13 output from the microphones 111 to 113. It converts into
electrical signals A21 to A23. The specific sound electrical signal extraction filters 131 to 133
03-05-2019
36
receive the electrical signals A21 to A23 output from the signal conversion circuits 121 to 123 in
synchronization with the clock signal CLK output from the CPU 14. The specific sound electrical
signal extraction filters 131 to 133 output the specific sound electrical signal obtained by
extracting the frequency component of the specific sound from the electrical signals A21 to A23
as the specific sound electrical signal A31 to A33.
[0113]
Sounding body coordinates A50 (X50, Y50) are coordinates (0, 0), (X112, 0), (0, Y113) of
microphones 111 to 113, and a distance S1 between microphones 111 to 113 and sounding
body 2 Using ~ S3 [m], X ^ 2 + Y ^ 2 = S1 ^ 2, (X-X112) ^ 2 + Y ^ 2 = S2 ^ 2, X ^ 2 + (Y-Y113) ^ 2
= S3 ^ 2. That is, when the distances S1 to S3 are the radius of the circle, the intersection of the
circles formed by the distances S1 to S3 represents the position of the sound source. That is, it
represents the sound generator coordinates A50.
[0114]
When the signal level of the construction control signal C31 is high level "H", the coordinate
construction unit 330 measures the specific sound electrical signals A31 to A33 output from the
specific sound electrical signal extraction filters 131 It stores in association with the coordinates
A50 (X50, Y50).
[0115]
The worker performs the above-described coordinate construction process on the sounding
object coordinates A50 (X50, Y50) of all the measurement targets.
[0116]
FIG. 30 is a diagram showing coordinate detection processing as an operation of the sound
generation body detection device 1 according to the third embodiment of the present invention.
The worker sets the signal level of the construction control signal C31 to low level "L" and sets
the signal level of the detection control signal C32 to high level "H".
03-05-2019
37
[0117]
When the signal level of the detection control signal C32 is high level "H", the coordinate
detection unit 320 is preceded and output from the specific sound electrical signal extraction
filters 131 to 133 in synchronization with the clock signal CLK output from the CPU 14. Specific
sound electrical signals A31-1 to A33-1 are input.
Among the coordinates of the plurality of patterns stored in the specific sound electrical signal
coordinate storage unit 310, the coordinate detection unit 320 sets the coordinates
corresponding to the voltage values of the specific sound electrical signals A31-1 to A33-1 to the
previous sounding body. It is detected as a sounding body coordinate A50 which is the
coordinate of 2. Here, the sounding body coordinates A50 which are the coordinates of the
sounding body 2 of the previous time are referred to as the previous sounding body coordinates
A50-1.
[0118]
In addition, when the signal level of the detection control signal C32 is high level "H", the
coordinate detection unit 320 outputs subsequent outputs from the specific sound electrical
signal extraction filters 131 to 133 in synchronization with the clock signal CLK output from the
CPU 14. The specified sound electrical signals A31-2 to A33-2 are input. Among the coordinates
of the plurality of patterns stored in the specific sound electrical signal coordinate storage unit
310, the coordinate detection unit 320 sets the coordinates corresponding to the voltage values
of the specific sound electrical signals A31-2 to A33-2 to the current sounding body. It is
detected as a sounding body coordinate A50 which is the coordinate of 2. Here, the sounding
body coordinates A50 which are the coordinates of the sounding body 2 of this time are referred
to as sounding body coordinates A50-2 of this time.
[0119]
The display control unit 170 synchronizes with the sound signal coordinates A50 (previous
sounding object coordinates A50-1, current sounding object coordinates A50-2) output from the
coordinate detection unit 150 in synchronization with the clock signal CLK output from the CPU
14; The image data A70 including the calculated distance A60 output from the distance
calculation unit 160 and the sound generator moving path A100 is generated, and the image
03-05-2019
38
data A70 is displayed on the display unit 12 (see FIGS. 12 and 13). The distance calculation unit
160, the display control unit 170, the distance determination result generation unit 180, the
alarm notification unit 190, and the movement history storage unit 200 are the same as in the
first embodiment, and thus the description thereof is omitted.
[0120]
As described above, in the sound generator detection device 1 according to the third embodiment
of the present invention, M (M is an integer of 2 or more) microphones 111 to 113 collect the
sounds A11 to A13, and the signal conversion circuit 121 To 123 convert the sounds A11 to
A13 output from the M microphones 111 to 113 into electric signals A21 to A23. The specific
sound electrical signal extraction filters 131 to 133 are specified by extracting the frequency
component of the specific sound which is the sound emitted by the moving sounding body 2
from the M electric signals A21 to A23 output from the signal conversion circuits 121 to 123.
Sound electric signals A31 to A33 (A31-1 to A33-1) (A31-2 to A33-2) are output. The coordinate
construction unit 330 causes the specific sound electrical signal coordinate storage unit 310 to
store in advance a plurality of patterns of M specific sound voltage values representing the
magnitude of the specific sound and the coordinates of the sound generator 2 in association with
one another. Among the coordinates of the plurality of patterns stored in the specific sound
electrical signal coordinate storage unit 310, the coordinate detection unit 320 outputs M pieces
of specific sound electrical signals A31 to A33 previously output from the specific sound
electrical signal extraction filters 131 to 133. The coordinates corresponding to the voltage value
of (A31-1 to A33-1) are selected as the previous sounding body coordinates A50 (A50-1) which
are the coordinates of the previous sounding body 2. Among the coordinates of the plurality of
patterns stored in the specific sound electrical signal coordinate storage unit 310, the coordinate
detection unit 320 outputs M specific sound electrical signals A31 to A33 subsequently output
from the specific sound electrical signal extraction filters 131 to 133. The coordinates
corresponding to the voltage value of (A31-2 to A33-2) are selected as the present sounding
body coordinates A50 (A50-2), which are the coordinates of the present sounding body 2.
[0121]
Thus, according to the sound generator detection device 1 according to the third embodiment of
the present invention, the coordinate construction unit 330 sets the volume of the specific sound
(specific sound voltage value) and the coordinates of the sound generator 2 to the specific sound
electrical signal coordinates. The specific sound (specific sound electric signals A31 to A33) is
generated by the signal conversion circuits 121 to 123 and the specific sound electric signal
03-05-2019
39
extraction filters 131 to 133 from the sounds A11 to A13 output from the microphones 111 to
113. The position of the sound generator 2 (sound generator coordinates A50) can be specified
by specifying the specific sound electrical signal coordinate storage unit 310 by the coordinate
detection unit 320. Furthermore, according to the sound generator detection device 1 according
to the third embodiment of the present invention, the specific sound (specific sound electric
signals A31-1 to A33-1) previously output from the specific sound electric signal extraction
filters 131 to 133 is generated. On the other hand, the specific sound (specific sound electrical
signal A31-2 to A33-) specified after the previous position of the sounding body 2 (previous
sounding body coordinate A50-1) is specified and subsequently output from the specific sound
electrical signal extraction filters 131 to 133. In contrast to the technique disclosed in NonPatent Document 1 and Patent Document 1, moving sound-generating body 2 is different from 2)
by specifying the position of current sound-producing body 2 (current sound-generating body
coordinates A50-2). The position of can be identified in real time. Further, according to the sound
generator detection device 1 according to the third embodiment of the present invention, in
order to refer to the specific sound electrical signal coordinate storage unit 310, a complicated
operation as in Non-Patent Document 1 and Patent Document 1 is required. do not do.
[0122]
As described above, the present invention is not limited to the embodiment described above, and
various modifications can be made within the scope of the claims. That is, an embodiment
obtained by combining technical means appropriately modified within the scope of the claims is
also included in the technical scope of the present invention.
[0123]
DESCRIPTION OF SYMBOLS 1 ... Sounding body detection apparatus, 2 ... Sounding body, 10 ...
Control apparatus, 11 ... Storage apparatus, 12 ... Display part, 13 ... Speaker, 14 ... CPU, 111-113
... Microphone, 121-123 ... Signal conversion circuit, 131 -133 ... specific sound electrical signal
extraction filter, 140 ... signal time difference detection unit, 150 ... coordinate detection unit,
151 ... time difference coordinate storage unit, 152 ... coordinate selection unit, 160 ... distance
calculation unit, 170 ... display control unit, 180 ... Distance determination result generation unit,
190 ... alarm notification unit, 200 ... movement history storage unit, 210 ... specific sound
electrical signal storage unit for determination, 221 to 223 ... specific sound electrical signal
determination unit, 240 ... signal time difference detection unit, 310 ... 310 Specific sound
electrical signal coordinate storage unit, 320 ... coordinate detection unit, 330 ... coordinate
construction unit, A11 to A13 ... sound, A21 to A23 ... electric signal , A31-A33 ... specific sound
electrical signal, A41-A42 ... arrival time difference, A50 ... sounding body coordinates, A60 ...
calculated distance, A70 ... image data, A80 ... distance judgment result, A90 ... alarm, A100 ...
03-05-2019
40
sounding body movement history coordinates , B21 to B23 ... determination result signal, C31 ...
construction control signal, C32 ... detection control signal, CLK ... clock signal
03-05-2019
41
Документ
Категория
Без категории
Просмотров
0
Размер файла
59 Кб
Теги
jp2015095763
1/--страниц
Пожаловаться на содержимое документа