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JP2010086112

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2010086112
An object of the present invention is to obtain various types of information used for navigation
even in a place where radio waves from a wireless base station such as underground do not
reach, and to obtain various types of information from the own device without accessing the
server device. Provide a navigation system that can A navigation system includes a transmitter 1
and a guide terminal 2. The transmitter 1 voices the guide voice data and the guide data (position
information indicating the current position of the transmitter 1, map data including the current
position of the transmitter 1, azimuth information indicating an emission azimuth from an
absolute azimuth) The sound is emitted from the speaker SP1 superimposed on the inaudible
area of the signal. The guide terminal 2 picks up the guide voice data and the guide data. Then,
the guide terminal 2 emits a sound based on the guide sound data from the speaker SP2. The
guide terminal 2 calculates the absolute direction using the direction information, and displays
the direction of the own device on the map indicating the current position of the transmitter 1
and displays it on the display unit 27. [Selected figure] Figure 2
Transmitter, guide terminal, and navigation system
[0001]
The present invention relates to a transmitter for providing various guide information to a user, a
guide terminal, and a navigation system.
[0002]
Conventionally, various types of transmitters, guide terminals, and navigation systems for
providing guide information such as guide voices and maps to the user have been proposed (see,
for example, Patent Document 1).
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[0003]
The mobile telephone terminal apparatus of Patent Document 1 detects the current position
based on the received electric field strength from the wireless base station.
The mobile telephone terminal apparatus detects the azimuth information indicating the
direction of the own apparatus by the geomagnetic sensor provided in the own apparatus.
At this time, in the mobile telephone terminal apparatus, vibration, rotation and the like caused
by hand movement affect the geomagnetic sensor, so the error of the azimuth information
generated due to the influence is corrected by the gyro sensor. The mobile telephone terminal
apparatus transmits the detected current position and direction information to the radio base
station, and receives from the radio base station map data in consideration of the current
position and orientation of the mobile telephone terminal apparatus. Then, the mobile phone
terminal device displays the received map data on the display unit. JP 2002-0031541 A
[0004]
However, the mobile phone terminal apparatus of Patent Document 1 can not detect the current
position in a place where radio waves from a wireless base station, such as underground, do not
reach. In addition, since the mobile telephone terminal device needs to include the geomagnetic
sensor and the gyro sensor only to detect the azimuth information, the manufacturing cost of the
device is increased. Furthermore, the mobile telephone terminal apparatus must access the radio
base station again using the current position and direction information to acquire map data used
for navigation.
[0005]
Therefore, according to the present invention, various information used for navigation can be
acquired even in a place where radio waves from a wireless base station, such as underground,
can not reach, and various information can be acquired without accessing the server apparatus
from the own apparatus. To provide a navigation system that can
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[0006]
The transmitter according to the present invention superimposes guide data including position
information indicating the current position of the device itself on a carrier wave signal (for
example, an audio signal in an audible area, an audio signal in an inaudible area, etc.).
Also, the transmitter 1 modulates the guide audio data into an audio signal in the inaudible area.
Then, the transmitter synthesizes the carrier wave signal and the voice signal to generate a
synthesized signal, and emits the sound from sound emitting means such as a speaker.
[0007]
As a result, even if the transmitter is in a place where radio waves from a wireless base station,
such as underground, do not reach, various information used for navigation (such as guide voice
data and position information indicating the current position of its own device) Data) can be
superimposed on the carrier signal and emitted.
[0008]
Further, the transmitter of the present invention further stores map information as guide data.
Further, the position information of the guide data is information indicating the position of the
own device in the map information.
[0009]
Furthermore, the transmitter of the present invention further stores azimuth information
indicating a sound emission azimuth from the absolute azimuth as the guide data. Then, the
transmitter emits the synthesized signal in a single directivity toward the emission direction
indicated by the stored direction information.
[0010]
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In addition, the guide terminal of the present invention combines the guide voice data modulated
into the inaudible area voice signal and the carrier signal on which the guide data including the
position information indicating the current position of the own device is superimposed. Pick up
the combined signal. The guide terminal demodulates the synthesized signal to obtain guide
voice data and guide data. The guide terminal emits a voice based on the guide voice data, and
uses the position information of the guide data to display information on the current position (for
example, an address, a building name, etc.) on a monitor, Notify by doing. In the latter case, the
guide terminal switches the information on the current position and the sound based on the
guide sound data, and emits sound from sound emitting means such as a speaker.
[0011]
As a result, even if the guide terminal is a place where radio waves from a wireless base station,
such as underground, do not reach, various information used for navigation without accessing
the server apparatus from its own device (voice data for guiding, data for guiding) You can get
Then, the guide terminal can notify the user of the current position of the transmitter (that is, the
current position of the user who owns the guide terminal) while emitting a voice based on the
guide voice data.
[0012]
Moreover, the guide terminal of this invention is equipped with display means, such as a monitor.
The guide terminal displays a map indicating the current position on the display means when the
guide data includes map information.
[0013]
Thereby, the guide terminal can notify the user's current position in an easy-to-understand
manner by displaying a map indicating the current position.
[0014]
Furthermore, the guide terminal of the present invention is provided with absolute direction
calculation means for calculating an absolute direction.
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The guide terminal calculates relative orientation indicating the orientation from the transmitter
when the orientation data indicating the emission orientation of the transmitter is included in the
guiding data from the absolute orientation, and the relative orientation and the orientation
information Calculate the absolute orientation based on. And a transmitter shows the direction of
an own apparatus on the map displayed on a display means based on absolute direction.
[0015]
Thus, the guide terminal can inform the user's current position more easily by displaying the
orientation of the device on the map indicating the current position.
[0016]
In the present invention, even in a place where radio waves from a wireless base station, such as
underground, can not reach, various information used for navigation can be acquired, and
various information can be acquired without accessing the server apparatus from the own
apparatus. Can.
[0017]
A navigation system according to the present invention will be described with reference to FIG.
FIG. 1 is an explanatory view for explaining an installation environment of the navigation system.
The navigation system comprises a transmitter 1 and a guide terminal 2. The transmitter 1 is
installed at an entrance of a station, a building or the like, a pedestrian crossing, a crossing or the
like. The transmitter 1 includes the speaker SP1 and emits sound toward the periphery of the
own device. On this voice, various information used for navigation is superimposed in the
inaudible area. The voice on which the various information is superimposed is collected by the
guide terminal 2 provided with MIC1 and MIC2. The guide terminal 2 is a terminal carried by
each user, and is, for example, a mobile phone terminal device or a hearing aid. The guide
terminal 2 performs navigation for the user based on the collected various information. In FIG. 1,
although the absolute azimuth is set to the true north azimuth (the azimuth angle from the
Earth's rotation north axis), it is not limited to the true north azimuth.
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[0018]
Next, the functions and configurations of the transmitter 1 and the guide terminal 2 will be
described with reference to FIGS. FIG. 2 is a block diagram showing the functional configuration
of the transmitter and the guide terminal. 2 (A) shows a transmitter, and FIG. 2 (B) shows a guide
terminal. FIG. 3 is a diagram showing a superimposed band of various information. FIG. 4 is a
diagram showing a specific example of a method of detecting an absolute orientation. FIG. 5
shows an example of a map displayed on the display unit. FIG. 5A shows a map in which the
upper direction of the display unit indicates the north direction, and FIG. 5B shows a map in
which the upper direction of the display unit indicates the traveling direction of the user.
[0019]
As shown in FIG. 2A, the transmitter 1 includes a storage unit 11, a sound emission direction
instructing unit 12, an azimuth data generation unit 13, a superposition unit 14, a modulation
unit 15, a synthesis unit 16, a control unit 17, and a speaker. It consists of SP1.
[0020]
The storage unit 11 stores voice data, guide voice data, position information, map data, and
absolute direction information.
[0021]
The voice data is voice data emitted by a so-called induction bell and is emitted from the
transmitter 1.
The voice data is voice data that indicates that the transmitter 1 such as “you can hear guide
voice here”, “ping pong”, etc. is installed.
In addition to indicating that the transmitter 1 is installed, it may be voice data indicating the
name of a station, the name of a building, and the like. The audio data is not limited to audio in
the audible area, and may be audio in the inaudible area.
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[0022]
The voice data for the guide is emitted from the guide terminal 2 and is "the entrance of the ○ ○
hospital, × × pharmacy is the entrance of the ビ ル building," "the ○ ○ store, the nearest
entrance to the △ park. ", Etc., audio data providing more detailed information than audio data.
[0023]
The position information is information indicating the latitude and longitude and the address of
the place where the transmitter 1 is installed.
[0024]
Map data is image data including a map near the installation place of the transmitter 1.
The range of the stored map is various, such as a map of Japan, a map of the Kanto region, a map
of Tokyo, a map of Minato Ward, a map near the installation place of the transmitter 1, and the
like.
[0025]
Absolute orientation information is information indicating an absolute orientation. The absolute
orientation information is registered by the installer of the transmitter 1 when the transmitter 1
is installed. The installer measures the absolute orientation using a geomagnetic sensor or the
like, and registers the absolute orientation information based on the measurement result.
[0026]
The sound emission direction instructing unit 12 acquires the absolute direction information
from the storage unit 11, and determines a sound emission azimuth angle Θ S indicating the
sound emission direction from the absolute direction of the sound emitted from the speaker SP1.
Then, the sound emission direction instructing unit 12 instructs the control unit 17 on the sound
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emission direction of the voice, and outputs the sound emission azimuth angle Θ S to the
direction data generation unit 13.
[0027]
The azimuth data generation unit 13 generates azimuth data indicating the sound emission
azimuth angle Θ S input from the sound emission azimuth designation unit 12 and outputs the
generated azimuth data to the superposition unit 14.
[0028]
The superimposing unit 14 converts the audio data acquired from the storage unit 11 into an
audio signal, and converts the converted audio signal into a guide data (position information and
map data acquired from the storage unit 11 and from the direction data generation unit 13
Orientation data) is superimposed.
This superposition method is, for example, an ODFM (Orthogonal Frequency Division
Multiplexing) method or a spread spectrum method. At this time, as shown in FIG. 3, the
superimposing unit 14 superimposes each of the guiding data on different frequency bands in
the inaudible area. Then, the superimposing unit 14 outputs the voice data after the
superposition to the synthesizing unit 16.
[0029]
The modulation unit 15 acquires guide voice data from the storage unit 11, modulates it into a
voice signal in the inaudible area, and outputs the modulated voice signal to the synthesis unit
16. This modulation scheme is AM modulation or the like. Further, at this time, as shown in FIG.
3, the modulation unit 15 modulates to a voice signal of a frequency band different from the
frequency band in which the guide data is superimposed.
[0030]
The synthesis unit 16 synthesizes the audio signal input from the modulation unit 15 with the
audio signal input from the superposition unit 14 to generate a synthesized signal, and outputs
the synthesized signal to the control unit 17.
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[0031]
The control unit 17 controls the emission direction of the speaker SP1 so that the synthesized
signal is emitted toward the emission direction instructed by the emission direction instruction
unit 12.
The control unit 17 outputs the combined signal input from the combining unit 16 to the speaker
SP1. Then, the speaker SP1 emits the synthesized signal input from the control unit 17 with a
single directivity.
[0032]
Further, as shown in FIG. 2B, the guide terminal 2 includes the microphones MIC1 and MIC2 and
BPF21, the first demodulator 22, the speakers SP2 and BPFs 23A and 23B, the second
demodulators 24A and 24B, and the absolute direction calculator 25. , An image generation unit
26, and a display unit 27.
[0033]
The microphones MIC1 and MIC2 are silicon microphones capable of collecting sound in the
inaudible area.
The microphones MIC1 and MIC2 output the collected audio signals to the BPF 21 and BPF 23A
and 23B, respectively. The microphones MIC1 and MIC2 are not limited to silicon microphones,
and may be microphones capable of collecting audio in the inaudible area.
[0034]
The BPF 21 acquires, from the audio signals input from the microphones MIC1 and MIC2, an
audio signal of a frequency band on which the guide audio data is superimposed, and outputs the
audio signal to the first demodulation unit 22.
[0035]
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The first demodulation unit 22 demodulates the audio signal input from the BPF 21 and outputs
the demodulated signal to the speaker SP2.
The speaker SP2 emits sound.
[0036]
The BPFs 23A and 23B obtain, from the audio signals input from the microphones MIC1 and
MIC2, respectively, an audio signal of a frequency band on which the guide data is superimposed,
and outputs the audio signal to the demodulators 24A and 24B.
[0037]
The second demodulation units 24A and 24B demodulate the audio signals respectively input
from the BPFs 23A and 23B, acquire guide data, and output the data to the absolute direction
calculation unit 25.
[0038]
The absolute azimuth calculation unit 25 calculates the relative azimuth angle ΘL indicating the
azimuth from the transmitter 1 to the own device, and based on the calculated relative azimuth
angle ΘL and the emission azimuth angle ΘS included in the guide data , To calculate the
absolute azimuth Θ.
[0039]
Specifically, the absolute orientation calculation unit 25 calculates the reach distance difference
ΔL based on the time difference (that is, the arrival time difference of voices) in which the guide
data is input.
The absolute direction calculation unit 25 is based on the distance L between the microphones
MIC1 and MIC2 and the reach distance difference ΔL from the transmitter 1 (strictly speaking,
the sound collection surface of the microphones MIC1 and MIC2 of the guide terminal 2) The
relative azimuth angle ΘL indicating the azimuth of the vehicle is calculated.
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The relative azimuth angle Θ L can be calculated by Equation 1.
[0040]
[0041]
The absolute azimuth calculation unit 25 calculates an absolute azimuth angle 基 づ い based on
the sound emission azimuth angle ΘS included in the guide data and the calculated relative
azimuth angle ΘL.
This absolute azimuth angle Θ can be calculated by Equation 2.
[0042]
[0043]
For example, as shown in FIG. 4, the transmitter 1 emits a voice from the absolute direction to
the south-east direction (emission azimuth angle Θ S = 135 degrees), and the direction from the
transmitter 1 to the guide terminal 2 is 45 degrees When calculated as (relative azimuth angle =
L = 45 degrees), the absolute azimuth angle Θ is Θ = 135−45 = 90 degrees.
In this case, it can be understood that the direction of 90 degrees is the absolute direction from
the direction of the sound collection surface of the microphones MIC1 and MIC2 of the guide
terminal 2.
That is, the guide terminal 2 can determine that the sound collection surfaces of the microphones
MIC1 and MIC2 are oriented in the west direction (the own device is oriented in the west
direction).
[0044]
Then, the absolute orientation calculation unit 25 outputs the absolute azimuth angle Θ, the
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position information included in the guide data, and the map data to the image generation unit
26.
[0045]
The image generation unit 26 generates an image of a map indicating the current position based
on position information indicating the position of the transmitter 1 and map data including a
map around the transmitter 1.
Then, the image generation unit 26 indicates the orientation of the own device in the generated
map image based on the absolute orientation. The image generation unit 26 outputs the image of
the map to the display unit 27.
[0046]
The display unit 27 displays the map image input from the image generation unit 26, as shown
in FIG. For example, in FIG. 5A, the display unit 27 displays an image in which the upper side
indicates the orientation of the own device (that is, the traveling direction of the user), or in FIG.
Or display
[0047]
As described above, the transmitter 1 emits a sound on which various information (guidance data
for guidance, data for guidance) used for navigation is superimposed. For this reason, even if the
guide terminal 2 is in the underground where radio waves do not reach, various types of these
can be obtained without merely accessing the transmitter 1 from the own device only by
collecting the sound emitted from the transmitter 1. Information can be obtained. In addition,
since the guide terminal 2 can know the direction of its own device by calculating the absolute
direction, it does not merely display the map of the current position on the display unit 27 but a
map of the current position showing the direction of the own device. By displaying, navigation
can be performed more easily. Furthermore, the transmitter 1 can perform navigation in a wider
range by changing the sound emission direction of the voice.
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[0048]
In the above embodiment, the guide terminal 2 displays the map indicating the direction of the
own device on the display unit 27. However, the guide terminal 2 may display only the map
indicating the current position without indicating the direction of the own device. . In this case,
since it is not necessary to calculate the absolute orientation in the guide terminal 2, the absolute
orientation calculation unit 25 is not an essential component. Further, in the transmitter 1, the
storage unit 11 does not need to store absolute direction information, and the sound emission
direction instructing unit 12 and the direction data generation unit 13 are not essential
components.
[0049]
Further, the guide terminal 2 may display the address at which the transmitter 1 is installed on
the display unit 27. In this case, in the transmitter 1, the storage unit 11 does not have to store
map data and absolute orientation information, and the sound emission direction instructing unit
12 and the orientation data generation unit 13 are not essential components. Moreover, in the
guide terminal 2, the absolute direction calculation unit 25 is not an essential component.
Furthermore, the guide terminal 2 may emit sound without displaying the address on the display
unit 27. In this case, in the guide terminal 2, the absolute orientation calculation unit 25, the
image generation unit 26, and the display unit 27 are not essential components. Further, the
guide terminal 2 may switch the address and the guide voice by the operation of the operation
unit (not shown) and emit the sound from the speaker SP2.
[0050]
It is an explanatory view for explaining an installation environment of a navigation system. It is a
block diagram which shows the function structure of a transmitter and a guide terminal. It is a
figure showing the superposition zone of various information. It is a figure which shows the
specific example of the detection method of an absolute azimuth | direction. An example of the
map displayed on a display part is shown.
Explanation of sign
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[0051]
DESCRIPTION OF SYMBOLS 1 ... Transmitter, 11 ... Storage part, 12 ... Sound emission direction
instruction | indication part, 13 ... Direction data generation part, 14 ... Superimposition part, 15
... Modulation part, 16 ... Synthesis part, 17 ... Control part, 2 ... Guide terminal, 21, 23A, 23B:
BPF, 22: first demodulation unit, 24A, 24B: second demodulation unit, 25: absolute orientation
calculation unit, 26: image generation unit, 27: display unit, MIC1, MIC2: microphone, SP1, SP 2
Speaker, L: Distance, ΔL: Arrival distance difference, Θ S: Discharge azimuth, Θ L: Relative
azimuth, Θ: Absolute azimuth
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