JP2009124404A - Mobile station communication system for railway vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize a high frequency receiving level on a base station side, in comparison with conventional cases. <P>SOLUTION: An inductive radio communication system performs communication between a train and a base station, by using an indirect coupling system which performs inductive coupling of an inductive radio frequency signal to an overhead wire, the inductive radio frequency signalk being electromagnetically radiated from a train running on a railway track by supplied power from the overhead wire, and further performs the inductive coupling of the inductive radio frequency signal to an inductive wire connected to the base station, wherein this mobile station communication system is loaded on the train including the head car, the tail car, and at least one intermediate car, and has transmitters which are installed in the head car and the tail car, respectively, and each of which includes an information input means, a generation means for generating the inductive radio frequency signal of a predetermined transmission frequency containing the input information, and a transmission antenna which electromagnetically irradiates the inductive radio frequency signal; a connection wire for connecting between the transmitters; and a short-circuiting means which is provided in the intermediate car, having a pantograph for receiving power from the overhead wire and short-circuit high-frequency current, flowing in the overhead wire from the pantograph to the railway track by performing the inductive coupling of the inductive radio frequency signal to the overhead wire. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a guided radio communication system used in railways, and more particularly to a mobile station communication system mounted on a railway vehicle.

  Inductive wireless communication is a communication means that uses electromagnetic induction between the induction line of the ground equipment and the on-board antenna of the mobile station on-board equipment, mainly electromagnetic coupling directly between the mobile station on-board antenna and the ground guide line. Direct coupling method, and indirect coupling method that performs communication by secondary coupling (indirect coupling) of high-frequency current by interposing another conducting wire (for example, overhead wire) between the on-board antenna and the ground guide wire, Widely used for ground railways and subways.

  FIG. 5 is a schematic configuration diagram of an induction radio communication system in the prior art, and shows a communication system using an indirect coupling system with a train line (trolley line) 2 interposed. As shown in FIG. 5, the guided radio communication system includes, for example, a command center device 10 of an operation command center and a base station device (also referred to as a fixed station device) 7 connected to the command center device 10 via a communication line 9. A satellite receiving station 55, a guide line 4 laid along the train line 2, a mobile station onboard apparatus 11 and a mobile station onboard apparatus mounted on a railway train (train) 1 running on the railroad track. 11 includes an on-board antenna (transmitting antenna 23 and receiving antenna 24).

  Now, when voice (call voice) is transmitted from the train 1 to the command station apparatus 10, the voice of the crew member uttered by the transmitter 12 of the mobile station onboard apparatus 11 is guided radio frequency f1 by the call transmitter 19. The signal is modulated into a high-frequency signal (for example, one wave of 80 to 250 kHz) (mobile station call transmission wave: hereinafter referred to as “signal S1”), and is radiated from the transmission antenna 23 (electromagnetic radiation). As a result, the signal S1 is inductively coupled to the train line 2 (primary coupling) and subsequently inductively coupled to the induction line 4 (secondary coupling). When the signal S1 is inductively coupled to the guide line 4, the signal S1 is called a “base station received wave” in the sense of a guided radio wave received on the base station side.

  The signal S1 (shown as S1 ′ because it is a secondary coupled wave) is received from the line coupler 5 through the connection cable 8 via the HYB (hybrid) 36 and 36 ′ from the matching unit 35 included in the base station apparatus 7. The signal is input to the device 37 and demodulated into a voice signal for a call. The demodulated voice signal of the call is sent from the voice signal comparison / selection circuit 58 via the control device 59 to the command station device 10 via the connection cable (communication line) 9 that connects the base station device 7 and the command station device 10. Communicated. However, an audio signal obtained by demodulating the signal S1 ′ received by the receiver 56 in the satellite receiving station 55 connected to the termination coupler 6 of the induction wire 4 is supplied to the audio signal comparison / selection circuit 58 by the cable 57. The voice signals received and demodulated by the receiver 37 of the base station 7 and the receiver 56 of the satellite receiver station 55 are compared and selected by the voice signal comparison / selection circuit 58. It is configured to be connected to the command center apparatus 10.

  The voice signal transmitted to the command station apparatus 10 by the cable 9 is amplified by the call amplifier 45 through the matching unit 60, HYB 61 and 62, and then reaches the speaker 48 through the command controller 47. A crew member's voice call is output.

On the other hand, when the call voice of the driving commander is transmitted from the command station apparatus 10 to the train 1, the call voice input to the handset 49 of the command station apparatus 10 is input from the command controller 47 to the voice amplifier 50, The signal is output to the connection cable 9 through the HYB 61 and the matching unit 60 and transmitted to the base station apparatus 7 through the connection cable 9. The voice signal from the command center apparatus 10 input to the base station apparatus 7 is input from the control circuit 59 to the call transmitter 42, and the call transmitter 42 receives a predetermined induced radio frequency f3 (for example, 80) different from the induced radio frequency f1. After being modulated into a high frequency signal (base station speech transmission wave: hereinafter referred to as “signal S3”) from the HYB 36 through the matching unit 35 to the induction line 4 from the connection cable 8 through the line coupler 5. Sent out.

  The signal S3 sent to the guide wire 4 is once electromagnetically induced (inductively coupled) to the train line 2 (primary coupling). The signal S3 guided to the train line 2 is inductively coupled to the receiving antenna 24 (secondary coupling), demodulated into a voice signal by the call receiver 26, operates the speaker 30, and the voice of the driving commander is output. With the above configuration, a voice communication (two-way call) can be performed between the train crew and the operation commander.

  In addition, the train 1 is usually used for emergency alerts (emergency warnings), including protective alerts to the command station device 10 and an oncoming train (opposite train) (not shown) when any emergency occurs on the train. A high-frequency signal (mobile station emergency transmission wave: hereinafter referred to as “signal S2”) having a single induction radio frequency f2 (for example, one wave of 80 to 250 kHz) different from the induction radio call transmission frequency f1 (signal S1). Equipment for delivery is provided.

  Now, when an emergency occurs in the train 1 and the crew member presses the alert push button 31 of the train 1 and an emergency alert signal (for example, one wave of 200 to 1000 Hz) is generated, the emergency alert transmitter 20 modulates it. As a result, it is converted into a high-frequency signal of the induction radio frequency f2, and is electromagnetically radiated to the train line 2 from the transmission antenna 23 tuned to the emergency notification frequency (frequency f2) through a changeover switch (not shown). 4 is inductively coupled.

  The signal S2 electromagnetically induced on the guide wire 4 is demodulated into an emergency signal sound (emergency alert signal) in the voice band by the emergency receiver 38 of the base station apparatus 7, and then transmitted from the cable 9 to the command station apparatus 10. The

  The emergency alert signal input to the command center apparatus 10 is amplified by the emergency alarm amplifier 63, and then the speaker 48 is operated to output an emergency signal sound. In addition to displaying various types of information, emergency warning information is transmitted to related equipment via the bidirectional cables 52 and 53.

  When reception of the emergency warning sound from the train 1 is confirmed by the command center device 10, an emergency alert response confirmation signal sound (different from the emergency alert signal, for example, from a transmitter (not shown) via the transmitter 50) (One wave of 200 to 1000 Hz) is modulated by the call transmitter 42 of the base station apparatus 7 to be a signal S3 of the base station call transmission frequency f3 and output to the guide line 4.

  The signal S3 output to the guide wire 4 is electromagnetically induced to the receiving antenna 24 of the train 1 through the train wire 2 once. The signal S3 of the induction radio communication reception wave including the emergency alert response confirmation signal sound received by the receiving antenna 24 is demodulated by the speech receiver 26 and output from the speaker 30 as the emergency alert response confirmation signal sound. The crew member can confirm that the emergency alert has been normally established by listening to the emergency alert response confirmation signal sound.

As prior arts related to the present invention, for example, there are techniques described in Patent Literature 1 and Patent Literature 2.
JP 2005-318448 A JP 2004-266719 A

In order to satisfy each of the functions described above, the high-frequency reception level that reaches the base station 7 is electromagnetically radiated from the transmission antenna 23 of the train 1 to the train line 2 and is further electromagnetically induced from the train line 2 to the guide line 4. Is required to be stable at all times. However, in the inductive coupling method of inductive radio, when an inductive radio frequency signal is transmitted by the transmission antenna 23 of the first vehicle 1A of the train 1, the inductive radio high frequency current it is generated by inductive coupling to the train line 2 as shown in FIG. Tends to flow in the traveling direction of the train 1 (forward, leftward in FIG. 5) as indicated by an arrow a.

On the other hand, toward the rear side of the train 1, the pantograph 34 from the train line 2 to the rear side of the train 1 via the connection line 64 near the train line 2 has an extremely low impedance with respect to the induction radio frequency. A device such as 65 is loaded with a connecting line between the rails (earth). For this reason, the induction wireless high-frequency current it does not easily flow toward the rear of the train 1, and almost no electromagnetic induction from the arrow b indicated by the dotted line can be expected. Therefore, as the train 1 approaches the substation 67, the antenna area (the length of the train line 2 through which the high frequency flows) becomes smaller, which is a cause of fluctuations in the high frequency reception level.

  Furthermore, the train line 2 is connected between the substations 67 and 68 having a low impedance with respect to the induction radio frequency (for example, 10 kHz to 250 kHz) in the traveling direction and the rear of the train 1. In some specific sections (locations), the secondary radiation from the train line 2 to the guide line 4 is further complicated, and the reception level of the base station device 7 is extremely lowered, which may hinder communication.

  The present invention has been made in view of the above problems, and provides a technique capable of stabilizing the high-frequency reception level on the base station side as compared with the conventional art.

  The present invention employs the following means in order to solve the above problems.

That is, according to the present invention, an induction radio frequency signal electromagnetically radiated from a train traveling on a track using electric power supplied from an overhead line is inductively coupled to the overhead line, and further guided to the induction line connected to the base station. In an inductive radio communication system for a railway vehicle that performs communication between the train and the base station by an indirect coupling method of coupling, including a leading vehicle, a trailing vehicle, and at least one intermediate vehicle that connects these vehicles A mobile station communication system mounted on a train composed of three or more vehicles,
A transmission device installed in each of the leading vehicle and the last vehicle, the information input means, the generation means for generating an induction radio frequency signal of a predetermined transmission frequency including the input information, and the induction radio Transmitting devices each including a transmitting antenna for electromagnetically radiating frequency signals;
A connecting line for connecting the transmitting devices;
A short circuit that is provided in at least one intermediate vehicle having a pantograph for receiving power from the overhead line and that short-circuits a high-frequency current flowing through the overhead line from the pantograph to the line by inductively coupling an induction radio frequency signal to the overhead line. Means and
When information is input to one of the transmission devices, one of the transmission devices generates an induced radio frequency signal of the predetermined transmission frequency including the information, and the guided radio is transmitted from a transmission antenna corresponding to the own device. Electromagnetic radiation of a frequency signal and transmission of the input information to the other of the transmission device via the connection line, the other of the transmission device including the information received from one of the transmission device Generates an induction radio frequency signal having the same transmission frequency as a predetermined transmission frequency, and synchronizes with one of the transmission devices, and electromagnetically radiates the induction radio frequency signal in parallel with the same phase from the transmission antenna corresponding to the own device. A mobile station communication system for a railway vehicle.

According to the present invention, induced radio frequency signals having the same transmission frequency are electromagnetically radiated in parallel from the transmission antennas of the respective transmission devices installed in the leading vehicle and the last vehicle. As a result, the high frequency reception level on the base station side can be stabilized by stabilizing the electromagnetic induction range with respect to the overhead line regardless of the traveling position of the train. On the other hand, since the high-frequency current flowing through the overhead line is short-circuited to the line (earth) by the short-circuit means, the induced radio frequency signal from the transmission antenna of the leading vehicle and the induced radio frequency signal from the transmission antenna of the last vehicle are The occurrence of beats due to interference on the overhead line can be suppressed.

According to the present invention, one of the transmission devices further includes emergency signal generation means for generating an induced radio frequency signal having an emergency signal transmission frequency different from the predetermined transmission frequency including the emergency signal in response to an emergency signal transmission instruction. ,
When transmitting information and an emergency signal in parallel to the base station, one of the transmission devices generates an induced radio frequency signal of the emergency signal transmission frequency in response to an emergency signal transmission instruction to the own device. Electromagnetic radiation from a corresponding transmitting antenna and transmission of input information to the other of the transmitting device via the connection line, the other of the transmitting device including the information received from one of the transmitting devices An induction radio frequency signal having the same transmission frequency as the predetermined transmission frequency may be generated, and the induction radio frequency signal may be electromagnetically radiated from a transmission antenna corresponding to the device itself.

Further, according to the present invention, the generation means in each of the transmission devices includes a modulator that modulates the input information signal with a predetermined carrier wave, and multiplies the signal modulated by the modulator to the predetermined transmission frequency. And a multiplier for inductive radio frequency signal of
When information is input to one of the transmitters, one of the transmitters modulates the information signal with the modulator and multiplies the signal with the multiplier, thereby inducing a radio frequency signal having a predetermined transmission frequency. And electromagnetically radiates the induction radio frequency signal from the transmission antenna corresponding to its own device, and transmits the modulation signal modulated by the modulator to the other of the transmission device via the connection line,
The other of the transmission devices generates an induction radio frequency signal having the same transmission frequency as the predetermined transmission frequency by multiplying the modulated signal received from one of the transmission devices by the multiplier. In synchronization with one of the devices, the induction radio frequency signal can be configured to be electromagnetically radiated in parallel with the same phase from the transmission antenna corresponding to the device itself.

  According to the present invention, the emergency signal generating means is modulated by an emergency signal generator, an emergency signal modulator that modulates an emergency signal output from the generator with a carrier wave, and the emergency modulator. And an emergency multiplier that multiplies the emergency signal to generate an induction radio frequency signal having a transmission frequency for the emergency signal that is different from the transmission frequency of the information.

  Further, according to the present invention, the connection line is used as a lead-through line or a crew-to-crew communication voice line that is independently passed between the first vehicle and the last vehicle of the train. A configuration that is a line can be applied.

  Further, in the present invention, the connection line is a service line used as an emergency call line between a passenger room and a passenger room, which is passed from the first vehicle to the last vehicle of the train. Can be applied.

  In the present invention, the connection line is a power line for supplying power to each vehicle, which is passed between the first vehicle and the last vehicle of the train, and the signal including the information includes It can be configured to be transmitted from one of the transmission devices to the other of the transmission devices through the power line.

  Further, the present invention can be configured such that the power of the generating means in the other of the transmission devices is turned on when the information is received from one of the transmission devices.

  According to the present invention, it is possible to stabilize the high-frequency reception level on the base station side as compared with the prior art.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Configurations in the following embodiments are examples, and the present invention is not limited to the configurations of the embodiments.

  FIG. 1 is a diagram showing an overall configuration of a guided radio communication system according to an embodiment of the present invention. In FIG. 1, a guided radio communication system includes, as ground equipment, a command station apparatus 10 installed at an operation command station of a railway vehicle, and a plurality of bases connected to the command station apparatus 10 via a communication line (cable 9). A station device 7 (in FIG. 1, base station devices 7A and 7B are illustrated).

  The guided radio communication system includes a mobile station on-vehicle device 11 that communicates with the base station device 7 using guided radio. In this embodiment, a railway vehicle (train 1 in this example) that receives power from a train line (overhead line) 2 and travels on a track 3 is provided with a plurality of mobile station on-vehicle devices 11A and 11B. . The train 1 has a transmission antenna 23 and a reception antenna 24 prepared for each mobile station on-vehicle device 11. The mobile station onboard apparatus 11A including the transmission antenna 23A and the mobile station onboard apparatus 11B including the transmission antenna 23B correspond to each transmission apparatus in the present invention.

The train 1 includes three or more vehicles including at least one intermediate vehicle (in FIG. 1, vehicles 1-1 and 1).
1-2,... 1-7 are exemplified). A set of a mobile station on-vehicle device, a transmission antenna, and a reception antenna is installed on each of the first vehicle and the last vehicle of the train 1.

  In this embodiment, the mobile station on-board device 11A (corresponding to the first mobile station on-board device) is installed in the vehicle 1-1 leading in the traveling direction of the train 1, and the last vehicle 1- 7, a mobile station on-vehicle device 11B (corresponding to a second mobile station on-vehicle device) is installed. These mobile station on-vehicle devices 11A and 11B are connected by a connection line A for transmitting an audio signal to be transmitted to the command station.

  A transmission antenna 23A and a reception antenna 24A corresponding to the mobile station on-vehicle device 11A are installed on the vehicle 1-1, and a transmission corresponding to the mobile station on-vehicle device 11B is installed on the vehicle 1-7. An antenna 23B and a receiving antenna 24B are installed.

In addition, at least one intermediate vehicle constituting the train 1 (in FIG. 1, the vehicle 1-3 and the vehicle 1
On the vehicle of −6), pantographs 34A and 34B that receive power from the train line 2 are respectively installed.

Each of the vehicle 1-3 and the vehicle 1-6 has motors 65A and 65B that receive power by the pantographs 34A and 34B and drive the driving wheels of the train 1 using electric power supplied via the power lines 64A and 64B, respectively. Power circuits including them are mounted, and these power circuits function as connection lines 66A and 66B connected to the line 3 (earth) via wheels. As described above, the intermediate vehicle having the pantograph includes a short-circuit path (short-circuit means) having a low impedance with respect to the high-frequency signal, which connects the induction radio-frequency high-frequency signal flowing through the train line 2 from the pantograph to the line 3 (earth). It becomes the composition.

In the case where voice is transmitted from the train 1 to the command station apparatus 10, for example, a case will be described in which a call communication is performed to the command station using the mobile station onboard apparatus 11A mounted on the leading vehicle 1-1. The voice (for example, a crew member's voice) input to the microphone 221 (FIG. 2) of the handset 122 of the mobile station onboard apparatus 11A is transmitted to a predetermined induced radio frequency f1 (for example, 8) by the mobile station onboard apparatus 11A.
It is converted into a high-frequency signal (mobile station call transmission wave) of 0 to 250 kHz and electromagnetically radiated from the transmission antenna 23A. As a result, the high-frequency signal is once inductively coupled to the train line 2 (primary coupling), and then inductively coupled to, for example, the guiding line 4 (secondary coupling). When the high-frequency signal is inductively coupled to the guide wire 4, it is called a “base station received wave” in the sense of a guided radio wave received on the base station side.

  The high-frequency signal that is secondarily coupled to the induction wire 4 is input from the line coupler 5 through the connection cable 8 to the call receiver 37 via the HYB (hybrid) 36 and 36 'from the matching unit 35 provided in the base station apparatus 7A. The audio signal is demodulated. The demodulated voice signal of the call is transmitted from the voice signal comparison / selection circuit 58 to the command station apparatus 10 via the control apparatus 59 via the connection cable 9 between the base station apparatus 7A and the command station apparatus 10.

  However, the audio signal obtained by demodulating the signal received by the receiver 56 in the satellite receiving station 55 connected to the termination coupler 6 of the induction wire 4 is input to the audio signal comparison / selection circuit 58 through the cable 57. The voice signals received and demodulated by the receiver 37 of the base station 7A and the receiver 56 of the satellite receiver station 55 are compared and selected by the voice signal comparison / selection circuit 58. It is configured to be connected to the device 10.

  When the high frequency signal is secondarily coupled from the power line 2 to the guide line 4A, the base station apparatus 7B performs almost the same operation as the base station apparatus 7A, and the audio signal is connected to the command center apparatus 10 through the cable 9. The

  The voice signal transmitted to the command station apparatus 10 by the cable 9 is amplified by the call amplifier 45 through the matching unit 60, HYB 61 and 62, and then reaches the speaker 48 through the command controller 47, and from the speaker 48 to the crew member. Is output.

  On the other hand, when the call voice of the driving commander at the driving command center is transmitted from the command station device 10 to the train 1, the call voice of the driving commander is input to the handset 49 of the command station device 10. The input call voice is input from the command controller 47 to the voice amplifier 50, and is transmitted to the base station apparatuses 7A and 7B via the HYB 61, the matching unit 60, and the connection cable 9.

  For example, a voice signal from the command center apparatus 10 input to the base station apparatus 7A is input from the control circuit 59 to the call transmitter 42 and modulated by the call transmitter 42, whereby the induced radio frequency f3 (for example, induction) After being converted to a high-frequency signal (base station call transmission wave: hereinafter referred to as “signal S3”) of 80 to 250 kHz different from the radio frequency f1, it is output to the connection cable 8 via the HYB 36 and the matching unit 35, It is sent to the guide wire 4 through the line coupler 5.

  The signal S3 sent to the guide wire 4 is once electromagnetically induced (inductively coupled) to the train line 2 (primary coupling). The signal S3 inductively coupled to the train line 2 is inductively coupled to, for example, the receiving antenna 24A of the mobile station onboard apparatus 11A (signal S3 ′, secondary coupling). In the mobile station on-vehicle apparatus 11A, the signal S3 ′ is demodulated, and finally, the voice of the driving commander is supplied to the speaker 25 provided on the mobile station on-vehicle apparatus 11A and the speaker 223 of the handset 122 (see FIG. 2). With the above configuration, a voice communication (two-way call) can be performed between the train crew and the operation commander.

In addition, each mobile station onboard device 11 mounted on the train 1 includes a guide radio that includes a protection notification to the command center device 10 and an oncoming train (not shown) when any emergency occurs in the train 1. High frequency signal (mobile station emergency transmission wave: different from frequency f1) of induction radio frequency f2 (for example, one wave of 80 to 250 kHz different from induction radio frequencies f1 and f3) for emergency alert (emergency alarm) and protection alert. Hereinafter, it is referred to as “signal S2.” However, in FIG.
The transmission path of 'is the same as the signals S1 and S1' and has a function of transmitting (not shown).

In order for an emergency to occur in the train 1 and for the crew to input an emergency signal transmission instruction, an emergency alert switch (notification) provided in the mobile station on-vehicle device 11 (for example, the mobile station on-vehicle device 11A) of the train 1 is provided. When the push button is pressed, an emergency signal (for example, one wave of 200 to 1000 Hz) is generated in the mobile station onboard apparatus 11A, and the emergency signal transmitter uses the induction radio frequency of the emergency signal transmission frequency (f2). Are generated. This high frequency signal is electromagnetically radiated from the transmitting antenna 23A tuned to the induction radio frequency f2 to the train line 2 as the signal S2, inductively coupled to the train line 2, and then inductively coupled to the induction line 4 as the signal S2 '. .

The signal S2 ′ (high frequency signal) coupled to the guide wire 4 is emergency signal sound in the voice band (after being demodulated into an emergency alert signal by the emergency receiver 38 of the base station apparatus 7A, and then sent from the cable 9 to the command station apparatus 10. Is transmitted to.

  The emergency alert signal input to the command center apparatus 10 is amplified by the emergency alarm amplifier 63 and then reaches the speaker 48, and an emergency signal sound is output from the speaker 48. At this time, various types of emergency alarm information are displayed on an external device, for example, the operation display board 54, and information on the occurrence of an emergency alarm is transmitted to related facilities via the bidirectional cables 52 and 53.

When reception of the emergency warning sound from the train 1 is confirmed by the command center apparatus 10, an emergency alert response confirmation signal sound (for example, 200 to 10 different from the emergency alert signal) is automatically sent from a transmitter (not shown).
00Hz) is transmitted from the command center apparatus 10 to the base station apparatus 7 (for example, the base station apparatus 7A), modulated by the call transmitter 42 of the base station apparatus 7A into the signal S3 of the base station call transmission frequency f3, and guided. Output to line 4.

The signal S3 output to the guide line 4 is linearly coupled to the train line 2, and further secondarily coupled to the reception antenna 24 (for example, the reception antenna 24A) of the train 1 as a signal S3 ′. The signal S3 ′ received by the receiving antenna 24A is demodulated into an emergency alert response confirmation signal sound by the emergency receiver in the mobile station onboard apparatus 11A, for example, by sounding the buzzer 26 (FIG. 2), Turn on the light. By listening to the buzzer sound, the crew can confirm that the emergency alert has been successfully established (transmitted to the command center).

  FIG. 2 is a diagram showing a configuration example of the mobile station on-vehicle devices 11A and 11B shown in FIG. The mobile station on-vehicle devices 11A and 11B have the same configuration. In FIG. 2, when the handset switch (relay) TS of the handset 122 including the microphone and the speaker is turned on, the mobile station on-vehicle device 11 on the side where the handset switch TS is turned on becomes the parent device. The mobile station on-vehicle device 11 that is not turned on functions as a slave device. For example, when the transmission / reception switch TS of the mobile station on-vehicle device 11A is turned on in a state where the transmission / reception switches TS and TS ′ of both the mobile station on-vehicle devices 11A and 11B are off, the mobile station on-vehicle device 11A. Becomes a parent device, and the mobile station on-vehicle device 11B becomes a child device. FIG. 2 shows a state where the mobile station on-vehicle device 11 is a parent device.

  The handset switch TS is configured to be switched between ON and OFF. In the ON state, the modulator (MOD) 131 is in an operating state, and the gate circuit 341 in the contactless switch circuit 134 is switched on. Turns on (open).

In this state, when voice is input from the transmission microphone 221 (input means) of the handset 122, the input voice signal is transmitted to the MOD 131 at a predetermined carrier frequency (for example, 20 to 1).
A signal modulated by a single wave of 00 kHz (call transmission output signal: equivalent to a modulated signal)
Divided into two and output. One of the divided signals is input to a frequency multiplier circuit (multiplier: TRIP) 132.

Here, the mobile station onboard apparatus 11 (11A) is provided with an emergency alert switch (relay) ES for transmitting an emergency alert. The emergency alert switch ES has contacts a, b and c,
In the off state, the contact point a and the contact point b are in a closed state, and the TRIP 132 is put into an operating state.

  The TRIP 132 multiplies the call transmission output signal input from the MOD 131 by several times (3 to 10 times), and outputs the signal as an induction radio frequency f1 of a predetermined transmission frequency. The output signal is amplified by a power amplifier (P-AMP) 133, and then electromagnetically radiated from the transmitting antenna 23A as an induction radio frequency signal S1 having an induction radio frequency f1, and a train line (overhead line) 2 (FIG. 1). Inductively coupled to Note that MOD 131, TRIP 132, and P-AMP 133 correspond to a call transmitter. Further, the MOD 131 and the TRIP 132 correspond to the generation unit of the present invention.

  On the other hand, the other signal (call transmission output signal) output from the MOD 131 and divided into two passes through the gate circuit 341 of the non-contact switch circuit 134, is amplified by the amplifier 342, and then is connected to the slave device via the connection line A. Is input to the non-contact switch circuit 134 ′ in the mobile station on-vehicle apparatus 11 </ b> B.

  In the contactless switch circuit 134 ′, since the handset switch TS ′ of the mobile station on-board device 11B (child device) is turned off (opened), the gate circuit 344 ′ is operated by the inverter 343 ′ of the contactless switch circuit 134 ′. (Open state). Therefore, the signal from the connection line A passes through the gate circuit 344 ′, is amplified by the amplifier 345 ′, and then is multiplied by the TRIP 132 ′ to the same induction radio frequency f1 as that of the parent device. The output signal from the TRIP 132 ′ is amplified by the P-AMP 133 ′ and then electromagnetically radiated from the transmitting antenna 23B as an induced radio frequency signal S1 having the same predetermined transmission frequency f1 as the mobile station on-vehicle device 11A (parent device) , Inductively coupled to train line 2.

Note that the mobile station on-vehicle device 11A and the mobile station on-vehicle device 11B are synchronized by their TRIPs 132 and 132 ', and the signal S1 is transmitted almost simultaneously (in parallel) from these transmission antennas 23A and 23B. Configured as follows. In addition, the transmission antennas 23A and 23B are adjusted so that the induction radio frequency signal S1 is electromagnetically radiated in the same phase (in phase) from each of the transmission antennas 23A and 23B. However, the position where the phase is matched is not limited to the transmission antenna, and a phase adjustment circuit can be provided at an appropriate position on the signal transmission path.

  Here, when the signal S 1 is inductively coupled (electromagnetic induction) from the transmission antenna 23 A to the train line 2, a high-frequency current it based on the signal S 1 flows toward the traveling direction (forward) of the train 1, and at the substation 67. Grounded (arrow a), thus forming a first loop (closed circuit: arrow a) in which high-frequency current flows between the substation 67 and the vehicle 1-1. On the other hand, the high-frequency current flowing through the train line 2 toward the rear of the train 1 by the inductive coupling of the signal S1 is short-circuited from the pantograph 34A to the line 3 (earth), and therefore hardly flows behind the pantograph 34A.

On the other hand, when the signal S1 is inductively coupled (electromagnetic induction) from the transmission antenna 23B to the train line 2, a high-frequency current flows toward the head of the train 1. However, this high-frequency current is short-circuited from the pantograph 34B to the line 3 (earth), and goes from the substation 68 behind the train 1 to the train line 2 (
As shown by arrow b), the second loop (closed circuit: arrow b) flowing between the vehicle 1-7 and the substation 68 is brought into a state of flowing. Thus, the high-frequency signal based on the inductive coupling of the signal S1 from the transmission antenna 23B is short-circuited by the pantograph 34B, and therefore hardly flows forward.

  Therefore, the high-frequency signal based on the signal S1 transmitted from the transmission antenna 23A of the parent device and the high-frequency signal based on the signal S1 transmitted from the transmission antenna 23B of the child device do not interfere with each other, and generation of beat sounds is suppressed. It is done.

  Conventionally, when a call voice is transmitted to a command center apparatus using one induction radio frequency as a transmission frequency, the call voice signal is transmitted using only the head station mobile station vehicle apparatus. For this reason, as the train 1 approaches the substation 67 from the substation 68, the distance that the high-frequency current it flows through the train line 2 becomes shorter (the first loop becomes smaller), and the secondary from the train line 2 to the guide line 4 becomes secondary. The range to be coupled (the reception range of the signal S1 ′ secondarily coupled from the train line 2 to the guide line 4) was narrowed. For example, in the example shown in FIG. 1, when the traveling position of the leading vehicle 1-1 of the train 1 exceeds the terminal coupler 6 of the guide line 4, the signal S1 'from the mobile station onboard apparatus 11A is coupled to the guide line 4A. There is a possibility that the high frequency reception level may be changed.

  On the other hand, according to the above-described configuration, at least one intermediate vehicle that short-circuits the high-frequency current flowing through the primary coupling conductor (train line 2) from the pantograph to the ground (line 3) is provided. A signal S1 having the same induction radio frequency f1 as the call transmission frequency (induction radio frequency) f1 from the mobile station onboard apparatus 11A is also transmitted from the mobile station onboard apparatus 11B mounted on the last vehicle 1-7. be able to.

  As the train 1 progresses, the antenna area of the first loop decreases. However, the antenna area of the second loop increases as the train 1 progresses. A large loop means that the effective height of the antenna increases. That is, the signal S1 from the transmission antenna 23B is inductively coupled to the power line 2, and a high-frequency current based on the signal S1 flows through the second loop, so that the signal S1 'from the train line 2 is transmitted to each of the induction lines 4 and 4A. Will result in a secondary bond. As a result, the command station apparatus 10 can obtain received waves (high-frequency signals based on the signal S1) from the base station 7A (satellite receiving station 55) and the base station 7B.

  In this way, the signal S1 can be received on the base station side more appropriately than before, and the call communication from the train 1 to the command station can be performed with a stable high frequency reception level on the base station side.

  Note that the call voice from the command center apparatus 10 is electromagnetically radiated as a signal S3 of the induction radio frequency f3, for example, at the base station apparatus 7A, and is first coupled to the induction line 4 and then secondarily coupled to the train line 2. Further, the signal is received by the receiving antenna 24A. A reception band pass filter (R-BP) 137 is connected to the reception antenna 24A, and only a signal in a predetermined frequency band is output from the R-BP 137. A call receiver (R1-T) 138 and an emergency receiver (R1-E) 141 are connected to the subsequent stage of the R-BP 137.

The call receiver 138 extracts the signal of the induced radio frequency f3 output from the reception bandpass filter 137, performs demodulation processing, and outputs the call voice signal obtained by the demodulation processing to the channel selector (CHSEL) 139. . The channel selector 139 includes a switch (switching device) and the like, and as an output destination of the call voice signal input from the call receiver 138,
It is possible to select and output at least one of the amplifier (AMP) 140 side and the connection line B side connected to the channel selector 139 ′ of the mobile station on-vehicle apparatus 11B. The channel selector 139 can also connect the call voice signal input from the connection line B to the amplifier 140.

The amplifier 140 amplifies the call voice signal input from the channel selector 139 and connects it to the speaker 25 or the speaker 223 of the handset 122. Thus, each speaker 25
And 223 can output voice from the command center apparatus 10 and voice from the mobile station on-vehicle apparatus 11B. The connection line B is one of the through lines provided from the vehicle 1-1 to the vehicle 1-7 of the train 1, and the voice from the operation command center is transmitted to the mobile station on-board devices 11A and 11B. Used to receive and communicate to the other.

  The output of the reception bandpass filter 137 is also connected to the emergency receiver 141, and the emergency receiver 141 extracts a signal of the induced radio frequency f 2 from the output of the reception bandpass filter 137 and receives a receiver (REC) 142. Connect to. The receiver 142 demodulates the emergency alert signal (protective alert signal) from the output signal of the emergency receiver 141. The emergency alert signal is connected to the emergency alert lamp and buzzer 26 to turn on and sound the emergency alert light and buzzer 26.

  In addition, when the handset switch of the mobile station on-vehicle device 11B of the vehicle 1-7 is turned on before the mobile station on-vehicle device 11A, the mobile station on-vehicle device 11B becomes the parent device. The mobile station on-board device 11A is a child device, and the above-described operation is performed by the mobile station on-board devices 11A and 11B, and the signals S1 and S2 are transmitted. Transmitted from antennas 23A and 23B.

  FIG. 3 shows that an emergency report is transmitted by the mobile station onboard apparatus 11A of the leading vehicle (vehicle 1-1) of the train 1, and the command station 22 receives a command from the handset 22 of the mobile station onboard apparatus 11A of the vehicle 1-1. FIG. 10 is an operation explanatory diagram when making a call communication with the apparatus 10.

When the emergency alert push button (emergency alert switch (relay)) ES) is turned on in the mobile station on-vehicle apparatus 11A, the connection state between the contact a and the contact b of the emergency alert switch ES is changed to the contact a. The connection state with the contact c is switched.

  Then, while the TRIP 132 is in a stopped state, the tone signal oscillator (OSC: oscillator) 135 and the emergency signal modulator (E-MOD) 136 as an emergency signal generator are in an operating state. The OSC 135 oscillates an emergency alert signal (emergency signal tone) having a predetermined frequency (for example, one wave of 200 to 1000 Hz) and inputs it to the E-MOD 136. The E-MOD 136 modulates the emergency alert signal. The modulated signal is frequency-multiplied by a frequency multiplier (not shown) and converted into an induction radio frequency signal having an emergency signal transmission frequency f2. Thereafter, after power amplification by the P-AMP 133, electromagnetic radiation is radiated from the transmission antenna 23A to the train line 2 as the signal S2 of the induced radio emergency transmission wave f2, and is further re-induced from the train line 2 to at least one of the guide lines 4 and 4A. Then, the emergency alert signal is transmitted to the command center apparatus 10 via at least one of the base stations 7A and 7B.

  The signal S2 electromagnetically radiated from the transmitting antenna 23A is transmitted to an opposite vehicle of the train 1, that is, another train (opposite to the train 1) traveling on another track provided along the track on which the train 1 travels. It functions as a protective alarm (transmitting emergency on the train 1) against a train (not shown). That is, the signal S2 is received by the receiving antenna of the oncoming train, demodulated into an emergency alert signal (emergency signal), and turns on and rings the emergency alert lamp and buzzer in the oncoming train.

  On the other hand, when a telephone call is made between the train 1 and the command center apparatus 10 during an emergency report by the mobile station onboard apparatus 11A of the train 1, the handset switch TS of the handset 122 of the mobile station onboard apparatus 11A is set. When the MOD 131 is turned on, the MOD 131 is activated and the gate circuit 341 of the contactless switch circuit 134 is opened. However, at this time, since the emergency alert switch ES is turned on, the TPIP 132 is in a stopped state.

In this state, the voice emitted from the transmission microphone 221 of the handset 122 is modulated to a predetermined frequency by the MOD 131 and output as a call voice signal. The output of the MOD 131 is divided into two parts, and one of the two parts is outputted from the gate circuit 341 of the non-contact switch circuit 134 through the amplifier 342 to the connection line (vehicle lead-in line) A. The call voice signal output to the connection line A is input from the leading vehicle 1-1 through the intermediate vehicles 1-2 to 1-6 to the contactless switch circuit 134 'in the last vehicle 1-7. .

  At this time, the handset switch (relay) TS ′ of the handset 122 ′ of the mobile station onboard apparatus 11B in the vehicle 1-7 is in an OFF state. For this reason, the MOD 131 ′ is in a stopped state. Further, the inverter 343 ′ of the non-contact gate circuit 134 ′ is turned off and the gate circuit 344 ′ is in an operating state.

  The call transmission wave (call voice signal) input to the contactless gate circuit 134 ′ from the mobile station onboard apparatus 11A is multiplied by 3 by the TRIP 132 ′ from the gate circuit 344 ′ through the amplifier 345 ′, and then the P− The power is amplified by the AMP 133 ′, and is electromagnetically radiated from the transmission antenna 23B to the train line 2 as a signal S1 having the same frequency as the call transmission wave of the vehicle 1-1, for example, the induction radio frequency f1 of 80 to 250 kHz.

  In this way, when a call voice is transmitted from the train 1 to the command center apparatus 10 during emergency notification of the mobile station onboard apparatus 11A as the parent apparatus, the call voice signal is transmitted to the child apparatus via the connection line A. The induction radio signal (signal S1) of the induction radio frequency f1 for transmitting call voice applied to the parent device is electromagnetically radiated from the mobile station onboard device 11B as the child device. In this way, even when an emergency is issued, the guidance radio signal of the call voice to be transmitted from the parent device can be transmitted to the command center device 10 using the child device.

  In the example shown in FIGS. 2 and 3, the connection line A is newly installed in the train 1. On the other hand, a configuration will be described in which a call voice signal is transmitted from a parent device to a child device using an existing lead-in line previously drawn in the train.

FIG. 4 is a diagram showing such a modification. In FIG. 4, a frequency conversion circuit 151 is connected to the contactless switch circuit 134 of the mobile station on-vehicle apparatus 11A. The frequency conversion circuit 151 is connected to the connection line B (one of the existing lead-through lines) through a high pass filter (HPF) 152.

  Also in the mobile station on-vehicle apparatus 11B, a frequency conversion circuit 151 ′ is connected to the non-contact switch circuit 134 ′, and this frequency conversion circuit 151 is connected to the connection line B via a high-pass filter (HPF) 152. Has been.

  The channel selectors 139 and 139 ′ of the mobile station on-vehicle devices 11A and 11B are connected to the connection line B via low-pass filters 153 and 153 ′. In this way, the connection line A is omitted.

According to such a configuration, a speech voice signal (a modulated speech voice signal modulated by the MOD 131) output through the amplifier 342 of the contactless switch circuit 134 is a frequency that is a fraction of the frequency conversion circuit 151. Is converted to, and then flows through the connection line B through the HPF 152. At this time, the call voice signal flowing through the connection line is blocked by the LPFs 153 and 153 ′, and the HPF.
It passes through 152 ′ and reaches the frequency conversion circuit 151 ′. The frequency conversion circuit 151 ′ converts the frequency of the call voice signal into the original frequency and inputs it to the contactless switch circuit 134 ′.

Further, each LPF 153 and 153 ′ passes an emergency signal tone (emergency alert signal: having a frequency lower than that of the call voice signal) transmitted and received between the channel selectors 139 and 139 ′. On the other hand, each of the HPFs 152 and 152 ′ blocks an emergency alert signal flowing through the connection line B. When the mobile station on-vehicle device 11B is the parent device, the reverse operation is performed.

  According to the above configuration, since it is not necessary to newly provide the connection line A from the leading vehicle 1-1 to the last vehicle 1-7, introduction of the mobile station onboard apparatuses 11A and 11B is facilitated. .

  The existing lead-through line is a connection used as an inter-crew communication voice line that connects between crew member communication devices provided on a plurality of vehicles (for example, the first and last vehicles) and connects between crew rooms. A through wire can be applied. Alternatively, a lead-through line used as an emergency call line (emergency contact line) between each cabin and the crew room can be applied.

  Note that the frequency conversion circuits 151 and 151 ′ reduce the frequency flowing on the connection line B in consideration of attenuation on the connection line B. Therefore, when it is not necessary to consider the attenuation of the voice signal, the frequency conversion circuits 151 and 151 ′ can be omitted.

  Further, PLC (power line communication) technology may be used for transmission of a call voice signal between the parent device and the child device. For example, after the call voice signal output from the non-contact switch circuit 134 is modulated by the PLC modem, it is sent to a power line (not shown) passed from the vehicle 1-1 to the vehicle 1-7 and transmitted through the power line. Then, the call voice signal reaching the vehicle 1-7 may be demodulated to the original signal by the PLC modem and input to the contactless switch circuit 134 ′.

Further, the power source of the transmission circuit of the induction radio frequency f1 such as TRIP 132 ′ or P-AMP 133 ′ in the slave device receives the call voice signal (modulation signal) by the non-contact switch circuit 134 ′ (
It can be configured to be input (power supply is started) when triggered by (detection or detection). In this way, the power consumption of the child device can be reduced.

  Further, although voice is exemplified as the information transmitted from the mobile station onboard apparatus to the base station apparatus (command station apparatus), data (text, image) can also be transmitted as information. By providing predetermined data input means (keyboard, buttons, etc.) to the mobile station onboard apparatus and converting the input data into, for example, a signal in the voice band, the data can be handled in the same way as voice. The modulation method by the MOD 131 can be appropriately selected and applied from an analog modulation method and a digital modulation method.

<Others>
The above-described embodiments disclose the following aspects.

(Aspect 1) A base station device equipped with a function for transmitting and receiving calls and emergency alerts is connected to a ground driving command station device through a communication line.
In addition, the base station device and the line coupler are connected by a guide wire laid along the railway line,
One or several pantographs and a train vehicle in which a power circuit is connected between rails are connected between the train front head vehicle and the rear head vehicle.
The front head vehicle and the rear head vehicle have a function of transmitting two frequencies having different frequencies of a call transmission wave and an emergency transmission wave, and a function of receiving a ground base station call transmission wave and a train emergency report wave. Equipped with a transmitter / receiver equipped,
If necessary, use one wave of the on-train transmission / reception device between the ground driving command station device and the on-train transmission / reception device from the train transmission / reception antenna via the train line (tree line). The induction wire laid along the railroad track by electromagnetic induction coupling,
For example, in the case of a call transmission / reception wave, a communication call between an on-board crew member and a ground driving commander, an emergency alert response confirmation, an emergency call communication call between a train passenger and a driving commander, a train commander via a train in-car broadcast device, Deliver emergency driving information to passengers,
In the emergency transmission wave, inductive radio train radio equipment of indirect inductive coupling that transmits signal information such as emergency alerts, protective alerts, deadman information, train equipment status information and failure information,
Either the front or rear leading vehicle transmission device is set as the parent device, and the front or rear leading vehicle transmission device on the opposite side of the parent device is the child device,
From the parent device to the child device at a carrier frequency set to a frequency of 1/3 to 1/10 of the call transmission frequency or emergency transmission frequency in the inter-vehicle service line between the parent device and the child device Transmit the transmitted wave to
By multiplying from 3 to 10 on the slave device side, the same transmission frequency as the transmission frequency on the parent device side,
Electromagnetic induction coupling from the transmission antenna of each of the front leading vehicle and the rear leading vehicle to the train line,
Furthermore, due to the secondary electromagnetic induction coupling between the train line and the ground induction line,
A railway characterized in that communication is performed by simultaneously transmitting the same transmission frequency from two on-board transceivers of the parent device and the child device between the ground driving command station and the mobile station on-board device. Train guided radio communication system.

(Aspect 2) There is no pantograph equipment in front of the transmitting antenna and the receiving antenna installed in the train front head vehicle and rear head vehicle,
Further, at least one or several pantographs and a vehicle in which a power circuit is connected between the rails are connected between the train front leading vehicle and the rear leading vehicle. Train-guided wireless communication system for railways.

(Aspect 3) A voice voice LPF (low pass filter) and a carrier frequency HPF (high pass filter) are respectively connected to a so-called crew communication voice line between a driver and a conductor installed in a vehicle.
The transmission of the frequency carrier wave between the front leading vehicle and the rear leading vehicle, and the communication voice line between the crew between the driver and the conductor is also used,
A train-guided radio communication system for railways according to aspect 1 or 2.

(Aspect 4) A call voice LPF (low pass filter) and a carrier frequency HPF (high pass filter) are respectively connected to a so-called emergency call voice line between a crew member and a passenger installed in a vehicle,
The transmission of the frequency carrier wave between the front head vehicle and the rear head vehicle, and the emergency call voice line between the crew and passengers,
A train-guided radio communication system for railways according to aspect 1 or 2.

(Aspect 5) The frequency synchronization between the parent device and the child device is characterized in that the carrier frequency of the parent device is multiplied to be a transmission frequency.
The train induction radio | wireless communications system for railroads as described in any one of aspect 1-4.

(Aspect 6) For the inter-car service line between the front head vehicle and the rear head vehicle, a power line laid on each railroad vehicle is used,
The above-mentioned both vehicle transmission / reception apparatus and the above-mentioned power line laid in each vehicle are connected by PLC (power line carrier communication),
The train guidance radio | wireless communications system for railroads as described in any one of aspect 1-5.

(Aspect 7) The power-on of the rear head vehicle or the child device side transmission device of the front head vehicle is sent from the side where either the front head vehicle or the rear head vehicle first becomes the parent device. The carrier frequency is detected by a signal receiver that receives the carrier frequency,
The train-guided wireless communication system for railway according to any one of aspects 1 to 6, wherein the power source of the transmission device of the slave device is controlled.

It is a figure which shows the example of whole structure of the induction | guidance | derivation radio | wireless communications system in embodiment of this invention. It is a figure which shows the structural example of the mobile station on-board apparatus shown in FIG. 1, and two mobile station on-board apparatuses used as a parent apparatus and a child apparatus transmit the induction | guidance | derivation radio frequency signal of a call transmission wave from each transmission antenna. The operation is shown. It is a figure which shows the structural example of the apparatus on a mobile station vehicle shown in FIG. 1, and transmits the induced radio frequency signal of the emergency alert from the parent apparatus, and transmits the induced radio frequency signal of the call transmission wave from the child apparatus Shows the operation. It is a figure which shows the modification of the mobile station vehicle top apparatus shown in FIG. It is explanatory drawing of a prior art.

Explanation of symbols

A, B ... Connection line 1 ... Train 1-1 ... Leading vehicle 1-7 ... Trailing vehicle 1-3, 1-6 ... Intermediate vehicle 2 ... Train line (overhead wire )
3 ... Track (Rail) (Earth)
4, 4 A, induction wire 5, line coupler 6, termination coupler 7 A, 7 B, base station apparatus (fixed station)
8 ... Connection cable between base station and line coupler 9 ... Connection cable 10 ... Command station equipment 11A, 11B ... Mobile station on-board equipment 122, 122 '... Handset 23A, 23B ..Transmission antennas 24A, 24B ... Reception antenna 25 ... Reception speaker (monitor) 26 ... Emergency alarm lamps and buzzers 34A, 34B ... Pantographs 131,131 '... Modulators 132,132 ´ ・ ・ ・ Frequency multiplier (multiplier)
133, 133 '... power amplifiers 134, 134' ... contactless switch circuits 135, 135 '... tone signal transmitters 136, 136' ... emergency modulators

Claims (8)

By an indirect coupling method in which an induction radio frequency signal electromagnetically radiated from a train traveling on the track using the power supplied from the overhead line is inductively coupled to the overhead line, and further inductively coupled to the induction line connected to the base station. In a guided radio communication system for railway vehicles that performs communication between the train and the base station, the train is composed of three or more vehicles including a leading vehicle, a trailing vehicle, and at least one intermediate vehicle that connects these vehicles. A mobile station system mounted on a train,
A transmission device installed in each of the leading vehicle and the last vehicle, the information input means, the generation means for generating an induction radio frequency signal of a predetermined transmission frequency including the input information, and the induction radio Transmitting devices each including a transmitting antenna for electromagnetically radiating frequency signals;
A connecting line for connecting the transmitting devices;
A short circuit that is provided in at least one intermediate vehicle having a pantograph for receiving power from the overhead line and that short-circuits a high-frequency current flowing through the overhead line from the pantograph to the line by inductively coupling an induction radio frequency signal to the overhead line. Means and
When information is input to one of the transmission devices, one of the transmission devices generates an induced radio frequency signal of the predetermined transmission frequency including the information, and the guided radio is transmitted from a transmission antenna corresponding to the own device. Electromagnetic radiation of a frequency signal and transmission of the input information to the other of the transmission device via the connection line, the other of the transmission device including the information received from one of the transmission device Generates an induction radio frequency signal having the same transmission frequency as a predetermined transmission frequency, and synchronizes with one of the transmission devices, and electromagnetically radiates the induction radio frequency signal in parallel with the same phase from the transmission antenna corresponding to the own device. A mobile station communication system for railway vehicles. One of the transmission devices further comprises emergency signal generation means for generating an induced radio frequency signal of an emergency signal transmission frequency different from the predetermined transmission frequency including the emergency signal in response to an emergency signal transmission instruction,
When transmitting information and an emergency signal in parallel to the base station, one of the transmission devices generates an induced radio frequency signal of the emergency signal transmission frequency in response to an emergency signal transmission instruction to the own device. Electromagnetic radiation from a corresponding transmitting antenna and transmission of input information to the other of the transmitting device via the connection line, the other of the transmitting device including the information received from one of the transmitting devices The mobile station communication system for a railway vehicle according to claim 1, wherein an induction radio frequency signal having the same transmission frequency as the predetermined transmission frequency is generated, and the induction radio frequency signal is electromagnetically radiated from a transmission antenna corresponding to the own apparatus. . The generating means in each of the transmission devices includes a modulator that modulates the input information signal with a predetermined carrier wave, and multiplies the signal modulated by the modulator to generate an induced radio frequency signal of the predetermined transmission frequency. And a multiplier that
When information is input to one of the transmitters, one of the transmitters modulates the information signal with the modulator and multiplies the signal with the multiplier, thereby inducing a radio frequency signal having a predetermined transmission frequency. And electromagnetically radiates the induction radio frequency signal from the transmission antenna corresponding to its own device, and transmits the modulation signal modulated by the modulator to the other of the transmission device via the connection line,
The other of the transmission devices generates an induction radio frequency signal having the same transmission frequency as the predetermined transmission frequency by multiplying the modulated signal received from one of the transmission devices by the multiplier. The mobile station communication system for a railway vehicle according to claim 1 or 2, wherein the induction radio frequency signal is electromagnetically radiated in parallel with the same phase from a transmitting antenna corresponding to the own device in synchronization with one side. The emergency signal generating means includes an emergency signal generator, an emergency signal modulator that modulates the emergency signal output from the generator with a carrier wave, and a multiplier for the emergency signal modulated by the emergency modulator. The mobile station communication system for railway vehicles according to claim 2 or 3, including an emergency multiplier that generates an induction radio frequency signal having a transmission frequency for an emergency signal different from the transmission frequency of the information. 5. The connection line according to claim 1, wherein the connection line is a through line used as an inter-crew communication voice line that is passed between the first vehicle and the last vehicle of the train. Mobile station communication system for railway vehicles. The connection line is a lead-through line used as an emergency call line between a passenger cabin and a passenger cabin, which is passed between the first vehicle and the last vehicle of the train. A mobile station communication system for railway vehicles according to claim 1. The connection line is a power line for supplying power to each vehicle that is passed from the first vehicle to the last vehicle of the train, and a signal including the information is transmitted through the power line to the transmission device. The mobile station communication system for railway vehicles according to any one of claims 1 to 4, wherein the mobile station communication system is transmitted from one side to the other side of the transmission device. The mobile station communication for a railway vehicle according to any one of claims 1 to 7, wherein a power source of the generation unit in the other of the transmission devices is turned on when the information is received from one of the transmission devices. system.

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