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DESCRIPTION JP2000261895

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DESCRIPTION JP2000261895
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
in-vehicle broadcast apparatus such as a railway, and more particularly to an in-vehicle broadcast
system (system) for self-diagnosis of in-vehicle broadcasts.
[0002]
2. Description of the Related Art In a conventional broadcasting apparatus such as a railway
vehicle, it is common to confirm the volume level of in-vehicle broadcasting of each vehicle and
to check the volume level when a failure occurs in the broadcasting apparatus of each vehicle.
Also, at the time of inspection of the broadcasting device, one person was broadcasting and
another person was checking each vehicle while checking the volume and failure.
[0003]
As a conventional specific in-vehicle broadcasting apparatus, a so-called distributed system is
adopted as in the in-car broadcasting apparatus of JP-A-55-141842, for example, and a
conventional general in-vehicle broadcasting apparatus is shown in FIG. is there. First, in order to
perform in-vehicle broadcasting, a crew member of the leading vehicle turns on a control switch
and sends a control signal for starting broadcasting to each vehicle from the control unit of the
control amplifier. Then, the control signal is received via the broadcast amplifier of each vehicle
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and set to a state where broadcasting can be performed. When set in this way, if broadcast is
performed from the broadcast microphone of the leading vehicle, the audio is amplified by the
amplifier of the microphone and further input to each broadcast amplifier through the signal
lines L1 and L2 and broadcast into the vehicle through the in-vehicle speaker Sound will be
output. On the other hand, if the control switch is turned off when the broadcast is finished, the
control signal is turned off, so that the broadcast amplifiers of each vehicle are turned off and the
in-vehicle broadcast is finished. As described above, at the time of inspection or breakdown of the
in-vehicle broadcast apparatus, while one crew member is broadcasting, another crew member
patrols each vehicle and listens to the broadcast sound while checking the inspection or
equipment abnormality. Specifically, it is performed by the following operation.
[0004]
In the case of microphone broadcast in-car broadcast, switch the speaker switch on the operation
unit to "in-car" and press (speak) while pressing the microphone push button. Switch to "outside
the car" and broadcast (transmit) while pressing the microphone button. Then, after the end of
the broadcast, it is set to "in-vehicle localization". The volume adjustment of the microphone
broadcast is performed in the same manner as vehicle handling when the driver broadcasts
through the volume adjuster of the control amplifier.
[0005]
In the case of tape broadcast manual handling, insert the tape into the tape player, switch the
control amplifier selector switch (manual or automatic) to "manual", press the tape start switch
on the operation unit, and then tape after the end of tape broadcast A stop signal is received and
it is made to stop automatically. Also, in the case of automatic broadcasting, the tape is inserted
into the tape player, the control amplifier switch (manual or automatic) is switched to
"automatic", the start signal is received by the ATO apparatus, and the tape is started. In the case
of a monitor, it can be confirmed by the monitor speaker of the player, and the monitor volume
of the tape broadcast can be adjusted by the monitor volume of the tape player. Also, the tape
broadcast and the volume can be adjusted with the output volume of the tape player.
[0006]
Crew call communication First, when contacting from the conductor, if the call control switch of
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the palm controller is switched to contact and the microphone push button is pressed before
calling, the other party's crew room speaker is driven. Then, after the communication call ends,
the communication broadcast changeover switch is set to "broadcast localization". Next, when
making a call from the driver, pressing the "on" of the touch switch on the driver's operator to
talk from the microphone drives the passenger room speaker on the passenger side. At the end of
the communication call, the communication switch is set to "off".
[0007]
Next, in the case of an emergency notification device which has been generally used
conventionally, a device which allows a passenger to notify a crew member at the time of an
emergency and which can simultaneously talk with the crew member is often used. When the
passenger depresses the notification push button of the notification device, the car-side light of
the vehicle is turned on and the reception notification is notified by the reception device buzzer
and the notification display light of the crew room. Next, when the crew member presses the
"confirm" pushbutton switch, the receiver buzzer stops ringing and the confirmation indicator
light of the informing device lights up, and the power supply of the transmission amplification
unit is pressurized to make a mutual call. It becomes possible. In addition, when the crew pushes
the reset push button switch of the receiver, it is restored normally.
[0008]
[Problems to be Solved by the Invention] The present invention has a problem to be solved by
improving the broadcasting apparatus such as a conventional railway vehicle to make it an invehicle broadcasting system (system) which has hitherto been considered impossible. . That is,
the problem to be solved by the present invention is that the location of the broadcasting device
of each vehicle for checking the performance of the broadcasting device at the time of inspection
or failure of the broadcasting device or confirming the presence or absence of the failure In the
in-vehicle broadcasting system (system), it is possible to easily and easily confirm these situations
with the leading vehicle and the crew room by improving the large number of man-hours and
complexity.
[0009]
SUMMARY OF THE INVENTION The present invention was developed to solve the problems as
described above, and is an in-vehicle broadcast comprised of an in-vehicle broadcast amplifier
and an in-vehicle broadcast speaker in each vehicle such as a railway. In an in-vehicle
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broadcasting mechanism comprising an apparatus and an in-vehicle broadcast control device
provided in a crew room of a leading vehicle and an intermediate vehicle, a reference signal for
in-vehicle broadcast system test is transmitted from the in-vehicle broadcast control device and
in-vehicle broadcast control The present invention provides an in-vehicle broadcast self-diagnosis
mechanism for a vehicle such as a railway, which is characterized by detecting a normal or
abnormal state of an in-vehicle broadcast apparatus by detecting an output of the apparatus and
an output level of each in-vehicle broadcast amplifier. An in-car broadcast speaker and another
impedance element form a balanced bridge at the output end of the in-car broadcast amplifier
provided in the in-car broadcast apparatus, and the in-car broadcast speaker It is an in-vehicle
broadcast self-diagnosis mechanism for vehicles such as railways that detects the output
generated by the balance of the balance bridge breaking due to the change of impedance caused
by the line and failure etc. Furthermore, the in-vehicle broadcast speaker and the balance bridge
are configured. The in-vehicle broadcast self-diagnosis mechanism for railway vehicles such as
railways, in which an impedance element loaded in series with the in-car broadcast speaker with
respect to the in-car broadcast amplifier is smaller than the impedance of the in-car broadcast
speaker. To provide.
[0010]
That is, according to the present invention, by providing the self-diagnosis function to the invehicle broadcast apparatus of the prior art, it is necessary to check the performance of the invehicle broadcast apparatus at the time of inspection or failure. It is an object of the present
invention to provide an in-vehicle broadcast system in which the large number of man-hours and
complexity are improved and easily checked.
[0011]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present embodiment of the
present invention is provided in an in-vehicle broadcast apparatus comprising an in-vehicle
broadcast amplifier and an in-vehicle broadcast speaker in each vehicle such as a railway, and in
a crew room of a leading vehicle and an intermediate vehicle. In the in-vehicle broadcasting
system including the in-vehicle broadcast control device, the in-vehicle broadcast control device
transmits a reference signal for in-vehicle broadcast system test, and detects the output of the invehicle broadcast control device and the output level of each in-vehicle broadcast amplifier An invehicle broadcast self-diagnosis mechanism characterized by detecting a normal or abnormal
state of the in-vehicle broadcast apparatus, and an in-vehicle broadcast speaker at an output end
of the in-vehicle broadcast amplifier provided in each of the in-vehicle broadcast apparatuses.
And other impedance elements form a balanced bridge, and the balance of the balanced bridge is
lost due to the change in impedance caused by disconnection or failure of the in-car broadcast
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speaker The in-vehicle broadcast self-diagnosis mechanism detects an output generated by the
above, and the impedance element constituting the in-vehicle broadcast speaker and the balance
bridge is loaded in series with the in-vehicle broadcast speaker with respect to the in-vehicle
broadcast amplifier. The in-vehicle broadcast self-diagnosis mechanism that forms a balanced
bridge by making the impedance element smaller than the impedance of the in-car broadcast
speaker, and is characterized by a broadcast amplifier and a broadcast speaker provided in a
vehicle such as a railway. And an in-vehicle broadcast system including a broadcast control
device provided in the crew room of the leading vehicle and the intermediate vehicle, and a
reference signal for testing the in-vehicle broadcast device from the broadcast control device. The
signal is output to a balanced bridge whose side is a broadcast speaker built into the broadcast
amplifier of each vehicle, If there is an error in the Announcement speaker can detect an
abnormal state the output to the voltmeter for detection collapsed balance balanced bridge
arises.
The output amplifier can also determine the normal or abnormal state by comparing the output
signal level with the input signal level for test.
Thus, while one employee broadcasts from the broadcast control device in the crew room as an
inspection of the broadcast system according to the conventional method, another crew member
hears the sound of each vehicle while checking the broadcast volume of each vehicle, and it is
troublesome. It is possible to determine whether the result is acceptable or not.
[0012]
Further, according to the embodiment of the present invention, the in-vehicle broadcast speaker
and the other impedance element form a balanced bridge at the output end of the in-vehicle
broadcast amplifier provided in each of the in-vehicle broadcast devices, and disconnection of the
in-vehicle broadcast speaker It is an in-vehicle broadcast self-diagnosis mechanism that detects
an output generated when the balance in the balance bridge breaks down due to a change in
impedance caused by a failure or the like, and an impedance element constituting the in-vehicle
broadcast speaker and the balance bridge is an amplifier for in-vehicle broadcast. On the other
hand, the in-vehicle broadcast self-diagnosis mechanism constitutes an equilibrium bridge by
making the impedance element loaded in series with the in-vehicle broadcast speaker smaller
than the impedance of the in-vehicle broadcast speaker. That is, the present invention comprises
an in-vehicle broadcast amplifier and an in-vehicle broadcast speaker provided in each vehicle
such as a railway, and an in-vehicle broadcast control device for controlling in-vehicle broadcast
provided in the crew room of the leading and intermediate vehicles. In the broadcasting system,
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the in-vehicle broadcast control device broadcasts a reference signal for testing the broadcasting
device and outputs it to the in-vehicle broadcast amplifier provided in each vehicle, and the invehicle broadcast amplifier is for in-vehicle broadcast The loudspeaker and other impedance
elements constitute a balanced bridge. Then, if there is a break or failure in the in-car broadcast
speaker, the impedance of the speaker changes and the balance of the balanced bridge is broken,
and an output occurs at both ends of the detection voltmeter, and the normal / abnormal state is
determined by the output level. be able to. As described above, according to the mechanism of
the present invention, when a broadcast apparatus provided in each vehicle is inspected, the
broadcast control apparatus in the crew room of the leading vehicle and the middle vehicle
broadcasts while another person is To provide an in-vehicle broadcast system capable of
detecting a normal / abnormal state by signals of each in-vehicle broadcast device if the invehicle broadcast control device broadcasts a reference signal for in-vehicle broadcast device
testing without the complexity of checking broadcast volume Can. The reference signal may be a
signal of a single frequency, or may be a signal having a plurality of frequency components.
[0013]
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing an in-vehicle broadcast self-diagnosis mechanism for a vehicle
such as a railway according to the present invention. First, when a crew member performs a test
inspection of a broadcast apparatus, a control signal for selecting a broadcast test is sent to a
control line by a control switch of a broadcast control apparatus, and a broadcast device other
than a broadcast microphone is activated. Specifically, a signal for test inspection is output from
the reference signal generator and amplified by the microphone amplifier. Then, the signal is
input from the transformer to the broadcast amplifier via the broadcast lines L1 and L2 and the
input transformer of the broadcast amplifier. On the other hand, since the balance bridge is
configured by the transformer Z1 connected to the in-car broadcast speaker and the other
impedance elements Z2, Z3 and Z4 at the output of the broadcast amplifier, detection of the
balanced voltage due to the loss of balance is made by a voltmeter It is detected. Since the
condition for this balanced bridge to be balanced is that Z1 * Z3 = Z2 * Z4, the reference signal
for test inspection is outputted at both ends of the voltmeter when this equilibrium is broken.
become. Also, this balancing bridge is necessary only at the time of test inspection of in-vehicle
broadcasting equipment. The impedance utilization of the impedance element Z2 is required to
be lower than that of the speaker transformer Z1 because the voltage utilization rate of the
broadcast amplifier is deteriorated in normal in-vehicle broadcasting. Also, as shown in FIG. 2,
the test test SW is put in parallel to Z2 and is opened only at the test test of the in-vehicle
broadcast apparatus, but it is improved at the time of normal broadcast by improving the voltage
utilization of the broadcast amplifier. It can also be done. By monitoring the input and output of
the broadcast amplifier and monitoring the output of the broadcast amplifier and the voltmeter
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as described above, it is possible to detect the normal / abnormal state of the in-vehicle broadcast
speaker. The crew can always detect the normal / abnormal state of the in-vehicle broadcast
apparatus of each vehicle while staying in the crew room via the monitor system or the like
installed in the vehicle.
[0014]
According to the present invention, an in-vehicle broadcast apparatus comprising an in-vehicle
broadcast amplifier and an in-vehicle broadcast speaker in each vehicle such as a railway, and an
in-vehicle broadcast control provided in the crew room of the leading vehicle and the
intermediate vehicle In the in-vehicle broadcasting mechanism comprising the device, the invehicle broadcasting control device transmits a reference signal for in-vehicle broadcasting
system test, and the output of the in-vehicle broadcasting control device and the output level of
each in-vehicle broadcasting amplifier are detected to detect the in-vehicle broadcasting device.
The in-vehicle broadcast self-diagnosis mechanism detects a normal or abnormal state of the
vehicle, and an in-vehicle broadcast amplifier provided at each of the in-vehicle broadcast devices
outputs a balanced bridge with an in-vehicle broadcast speaker and another impedance element.
Configure and detect the output generated when the balance of the balance bridge breaks down
due to a change in impedance caused by disconnection or failure of the in-car broadcast speaker
An in-vehicle broadcast self-diagnosis mechanism, and further, in the impedance element
constituting the in-car broadcast speaker and the balance bridge, the impedance element loaded
in series with the in-car broadcast speaker with respect to the in-car broadcast broadcast
amplifier This is an in-vehicle broadcast self-diagnosis mechanism that makes the balanced
bridge smaller than the impedance of S. Therefore, it has the following effects. A. According to
the conventional broadcasting apparatus, it is necessary to move to a place where the
broadcasting apparatus of each vehicle is located to check the performance of the broadcasting
apparatus at the time of inspection or failure or to confirm the presence or absence of the failure.
If this is done, such a large number of man-hours and complexity can be improved, and these
situations can be easily and easily confirmed by the lead vehicle and the crew room. The
confirmation of the sound by the human voice is difficult to determine because the sound
pressure level fluctuates, but the determination is easy because the sound pressure level is stably
obtained by using the reference signal.
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