JP2007253635A - Train detection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent generation of interference between signal waves of an adjacently installed communication shut-off type train detection system for a high vehicle height train and a communication shut-off type train detection system for a low vehicle height train. <P>SOLUTION: A synchronizing signal transmitter 15 normally transmits a synchronizing signal S. A transmitter/receiver 11 for a high vehicle height and a transmitter/receiver 12 for a low vehicle height transmit high vehicle height response wave SS1 and low vehicle height response wave SS2 modulated based on the synchronizing signal S, respectively. A high vehicle height on-vehicle transmitter/receiver 17 and a low vehicle height on-vehicle transmitter/receiver 18 transmit high vehicle height on-vehicle response wave SS3 and low vehicle height on-vehicle response wave SS4 modulated based on the synchronizing signal S, respectively. A receiver 13 for a high vehicle height receives the high vehicle height response wave SS1 or the high vehicle height response wave SS3, demodulates the wave based on the synchronizing signal S and generates an output signal. A receiver 14 for a low vehicle height receives the low vehicle height response wave SS2 or the low vehicle height on-vehicle response wave SS4, demodulates the wave based on the synchronizing signal S, and generates an output signal. A signal processor 16 decides on-rail existence, etc. of the train based on the output signal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a train detection system that detects the position and type of a train using radio.

A train position detection system that detects a train position by a track circuit has been widely adopted, but has a problem that a large cost is required for maintenance and inspection, and train position detection becomes unstable due to occurrence of a short circuit failure. Therefore, a train detection system that does not rely on track circuits has been developed and has been introduced to commuting lines in metropolitan areas, but this system requires enormous initial capital investment, so it is introduced to local traffic lines. That is economically impossible.

Japanese Patent Laid-Open No. 2001-63575 (Patent Document 1) includes a ground transmitter / receiver in which a transmitter and a receiver are arranged with a rail between borders of a block section, and train identification information of the train arranged on the train. There is disclosed a train detection system including an on-vehicle transmitter / receiver that transmits to the ground transmitter / receiver and a detection processing means that performs a detection process of a train approach / exit. Both the ground transceiver and the on-board transceiver are transceivers having a narrowly oriented wireless communication area. And the said detection processing means is based on the interruption | blocking and recovery | restoration of the communication between the said transmission part in the said ground transmitter / receiver, and the reception of the said organization identification information in the said ground transmitter / receiver. A detection process is performed.

Japanese Patent Laying-Open No. 2004-66946 (Patent Document 2) discloses a first communication unit installed in the vicinity of one line of a double track section in which two lines exist, and the first communication unit across the two lines. 2nd communication means which is arranged opposite to and outputs information on presence / absence of communication interruption, and is mounted on the train, and can communicate with the communication means closer to the train among the first communication means and the second communication means Train detection information is input from any one of the first communication means and the second communication means based on reception of a signal from the third communication means and the third communication means, and the second communication means A train detection system configured to include a train detection device that detects a train by specifying an on-track line when communication interruption information is input from is disclosed.

All of the train detection systems described above are wireless communication cut-off train detection systems, which are low-cost train detection systems that suppress initial capital investment and reduce maintenance and inspection costs, and have high detection accuracy. It is a train detection system with excellent stability. Moreover, the train detection system disclosed in Patent Document 2 has a feature that a train can be detected by identifying a track where a train exists even in a double track section where two tracks exist.

By the way, in recent years, a vehicle having a height as low as several tens of centimeters has been developed with respect to a standard height vehicle, and two types of trains having different vehicle heights have run on the same track. For this reason, the conventional communication cut-off type train detection system using wireless communication has a problem that a train of a vehicle with a low vehicle height cannot be detected. This is because the interrogator antenna and the ground responder antenna are installed at a height suitable for detecting a standard vehicle height train in a conventional communication cut-off type train detection system using radio.

Therefore, the applicant of the present invention is a communication interruption type train detection system provided with an interrogator and a responder corresponding to the vehicle height, that is, a communication interruption type train detection system provided with two antennas having a height corresponding to the vehicle height. Was built and field tested.

As shown in FIG. 5, this communication interruption type train detection system includes a high vehicle height interrogator 23 and a high vehicle height interrogator 23 for detecting a high vehicle train installed opposite to one side and the other side of the track 3. To detect a train with a low vehicle height installed adjacent to the vehicle height responder 21, the vehicle height interrogator 23, and the vehicle height responder 21, respectively, facing one side and the other side of the track 6. Low vehicle height interrogator 24 and low vehicle height responder 22, high vehicle height onboard responder 25 mounted on a high vehicle height train, low vehicle height onboard response mounted on a low vehicle height train A train detection system including a high-vehicle height interrogator 21 and a signal processing device 27 for determining a train line etc. based on an output signal from the high-vehicle height interrogator 21 and a low-vehicle interrogator 22. The interrogation wave S11 from the interrogator 21 and the interrogation wave S12 from the low vehicle height interrogator 22 have different phases. It is a system. In short, a communication cut-off type high train detection system with a high antenna for detecting a train with a high vehicle height and a communication cut-off type low train detection system with a low antenna for detecting a train with a low vehicle height. The two train detection systems are installed adjacent to each other, and the communication detection type train detection system is configured such that the phases of the interrogation waves of the two train detection systems are different.

When the train does not exist in the detection section, the high vehicle height responder 21 receives the interrogation wave S11 from the high vehicle height interrogator 23 as shown in FIG. Then, the high vehicle height responder 21 performs data modulation on the interrogation wave S11 with the high vehicle height unique information ID-1 and further uses the high vehicle high response wave SS11 obtained by spreading and modulating with the predetermined PN code. To the device 23. The high vehicle height interrogator 23 spreads and demodulates the high vehicle height response wave SS11, further demodulates the data, and outputs the high vehicle height specific information ID-1 to the signal processor 26. Similarly, the low vehicle height responder 22 receives the interrogation wave S12 from the low vehicle height interrogator 24. Then, the low vehicle height responder 22 performs data modulation on the interrogation wave S12 with the low vehicle height unique information ID-2, and further converts the low vehicle height response wave SS12 that has been spread-modulated with a predetermined PN code into the low vehicle height question wave To the device 24. The low vehicle height interrogator 24 receives the low vehicle height response wave SS12, performs spread demodulation, and further demodulates the data, and outputs the low vehicle height specific information ID-2 to the signal processor 26. Therefore, the signal processor 26 determines that there is no train in the detection zone based on the input high vehicle height specific information ID-1 and low vehicle height specific information ID-2.

Next, when a train with a high vehicle height enters the detection zone, as shown in FIG. 5 (B), the high vehicle height responder 21 is blocked by the high vehicle height train 1 and the high vehicle height interrogator. 23 cannot receive the interrogation wave S11. The low vehicle height responder 22 is also blocked by the high vehicle height train 1 and cannot receive the interrogation wave S12 from the low vehicle height interrogator 24. Instead, the high vehicle height onboard responder 27 receives the interrogation wave S11 from the high vehicle height interrogator 23. Then, the high vehicle height onboard responder 27 modulates the interrogation wave S11 with the high vehicle height specific information ID-3H, and further spreads the high vehicle height onboard response wave SS13 that has been spread-modulated with a predetermined PN code. It transmits to the interrogator 22 for high use. The high vehicle height interrogator 22 receives the high vehicle height on-vehicle response wave SS13, spreads and demodulates it, further demodulates the data, and outputs high vehicle height specific information ID-3H to the signal processor 26. Therefore, the signal processor 26 determines that the high vehicle height train 1 is present in the detection section based on the input high vehicle height specific information ID-3H.

When a train with a low vehicle height enters the detection zone, the high vehicle height responder 21 is not blocked by the low vehicle height train 2 as shown in FIG. The interrogation wave S11 is received. The high vehicle height interrogator 23 spreads and demodulates the high vehicle height response wave SS11, further demodulates the data, and outputs the high vehicle height specific information ID-1 to the signal processor 26. However, the low vehicle height responder 22 is blocked by the low vehicle height train 2 and cannot receive the interrogation wave S12 from the low vehicle height interrogator 24. Instead, the low vehicle height onboard responder 28 receives the interrogation wave S12 from the low vehicle height interrogator 22. The low vehicle height onboard responder 28 performs data modulation on the interrogation wave S14 with the low vehicle height specific information ID-3L, and further lowers the low vehicle height onboard response wave SS14 that has been spread-modulated with a predetermined PN code. Transmit to high interrogator 24. The low vehicle height interrogator 24 receives the low vehicle height vehicle response wave SS14, spreads and demodulates it, further demodulates the data, and outputs low vehicle height specific information ID-3L to the signal processor 26. Accordingly, the signal processor 26 determines that the low vehicle height train 2 is present in the detection section based on the input high vehicle height specific information ID-1 and low vehicle height specific information ID-3L. judge.

Theoretically, as described above, the communication interruption type train detection system provided with two types of antennas having different heights according to the vehicle height can reliably detect both the high vehicle height train 1 and the low vehicle height train 2. It is a spear. However, as a result of a field test, it has been found that a communication interruption type train detection system including two types of antennas having different heights according to the vehicle height is not practical. The cause is that the interrogation wave S11 from the interrogator for high vehicle height 22 interferes with the interrogation wave S12 from the interrogator for low vehicle height 24, and the interrogator for high vehicle height 21 receives from the responder 23 for high vehicle height. This is because the response wave received from the high vehicle height responder cannot be normally demodulated by the high vehicle height interrogator.
JP 2001-63575 A JP 2004-66946 A

  The problem to be solved by the present invention is that a wireless communication cut-off train detection system for detecting a train with a high vehicle height and a wireless communication cut-off train detection system for detecting a train with a low vehicle height are installed adjacent to each other. In the train detection system, interference is not caused between the signal waves of both train detection systems.

In order to solve the above-mentioned problem, a communication cut-off train detection system for low vehicle height using radio and a communication cut-off train detection system for high vehicle height using radio are installed adjacent to each other, and the two communication One signal for synchronization common to the block train detection system was adopted.

That is, a train detection system that solves the above problems includes a first transmitter / receiver installed on one side of a track, a second transmitter / receiver installed facing the other side of the track, and constantly transmitting a synchronization signal S, It is a train detection system comprised with the signal processor which determines a train presence line etc. based on the output signal from a transmission / reception part and a said 2nd transmitter / receiver.

The first transceiver includes a synchronization signal receiving unit that receives the synchronization signal S, a high vehicle that constantly modulates the high vehicle height response wave SS1 by modulating the received synchronization signal S with the high vehicle height specific information ID-1. The high response wave transmission unit and the low vehicle high response wave transmission unit that always modulates the received synchronization signal S with the low vehicle height specific information ID-2 and constantly transmits the low vehicle high response wave SS2.

The on-vehicle transmitting / receiving unit modulates the received synchronization signal S with the on-vehicle unique information ID-3 and transmits an on-vehicle response wave SS3. And a response wave transmission unit.

Further, the second transmitter / receiver is a synchronization signal transmitting unit that constantly transmits the synchronization signal S, and a high vehicle that receives the high vehicle high response wave, demodulates it with the synchronous signal S, and outputs unique information ID-1 for high vehicle height. A high response wave receiving unit, a low vehicle high response wave receiving unit that receives the low vehicle high response wave, demodulates with the synchronization signal S, and outputs low vehicle height specific information ID-2. And an on-vehicle response wave receiving unit that demodulates with the signal S and outputs on-vehicle unique information ID-3.

  According to the present invention, even if the communication detection type low vehicle height train detection system and the high vehicle height train detection system using radio are installed adjacent to each other, no interference occurs between the signal waves of both train detection systems. Both high-train vehicles and low-train trains running on the same track can be detected reliably.

The present invention includes a first transmitter / receiver installed on one side of a track, a second transmitter / receiver installed opposite to the other side of the track and constantly transmitting a synchronization signal S, an on-vehicle transmitter / receiver, and the second transmitter / receiver In the train detection system configured with a signal processor for determining the train line etc. based on the output signal from the device, the first transmitter / receiver, the second transmitter / receiver, and the on-vehicle transmitter / receiver are configured as follows: It is characterized by.

That is, the first transmitter / receiver is a synchronization signal receiving unit that receives the synchronization signal S, and a high vehicle that constantly modulates the high vehicle height response wave SS1 by modulating the received synchronization signal S with the high vehicle height specific information ID-1. The high response wave transmission unit and the low vehicle high response wave transmission unit that always modulates the received synchronization signal S with the low vehicle height specific information ID-2 and constantly transmits the low vehicle high response wave SS2.

The on-vehicle transmitting / receiving unit modulates the received synchronization signal S with the on-vehicle unique information ID-3 and transmits an on-vehicle response wave SS3. And a response wave transmission unit.

The second transmitter / receiver is a synchronization signal transmitter that constantly transmits a synchronization signal S, a high vehicle that receives the high vehicle height response wave, demodulates the synchronization signal S, and outputs high vehicle height specific information ID-1 A high response wave receiving unit, a low vehicle high response wave receiving unit that receives the low vehicle high response wave, demodulates with the synchronization signal S and outputs low vehicle height specific information ID-2, and receives the on-vehicle response wave SS3 And an on-vehicle response wave receiver that demodulates with the synchronization signal S and outputs on-vehicle unique information ID-3.

As shown in FIG. 1, the train detection system according to the first embodiment of the present invention includes a high vehicle height transceiver 11 and a vehicle height for detecting a high vehicle train installed adjacent to one side of the track 3. A first transmitter / receiver 4 configured with a low-vehicle- height transmitter / receiver 12 for detecting a train with a low vehicle height, a high vehicle height for detecting a train with a high vehicle height installed adjacent to the other side of the track 3 Receiver 13 and second transmitter / receiver 5 composed of a low vehicle height receiver 14 and a synchronization signal transmitter 15 for detecting a low vehicle height train, a high vehicle height mounted on a high vehicle height train Based on the output signals from the onboard responder 17, the onboard responder 18 mounted on the low train, the high height receiver 13 and the low height receiver 14, etc. It is a train detection system comprised with the signal processor 16 which determines this.

The high vehicle height receiver 13 and the low vehicle height receiver 14 are given a synchronization signal S from a synchronization signal transmitter 15. The synchronization signal S is constantly transmitted from the antenna 15a to the opposite side of the line 3, and the synchronization signal S received by the antenna 19 is input to the high vehicle height transceiver 11 and the low vehicle height transceiver 12. The

When the train does not exist in the detection section, as shown in FIG. 1A, the high vehicle height transmitter / receiver 11 data-modulates the synchronization signal S with the high vehicle height specific information ID-1 and further performs a predetermined PN. A high vehicle height response wave SS1 spread-modulated with a code is transmitted to the high vehicle height receiver 13. The high vehicle height receiver 13 receives the high vehicle height response wave SS <b> 1, spreads and demodulates it, and further demodulates data with the synchronization signal S and outputs the high vehicle height specific information ID- 1 to the signal processor 16.

Similarly, the low vehicle height transmitter / receiver 12 uses the low vehicle height response wave SS2 that has been subjected to data modulation of the synchronization signal S with the low vehicle height specific information ID-2 and further spread-modulated with a predetermined PN code. Transmit to receiver 14. The low vehicle height receiver 14 receives and spread-demodulates the low vehicle height response wave SS 2, further demodulates the data with the synchronization signal S, and outputs low vehicle height specific information ID- 2 to the signal processor 16.

Therefore, the signal processor 16 determines that no train is present in the detection section based on the input high vehicle height specific information ID-1 and low vehicle height specific information ID-2.

Next, when a train with a high vehicle height enters the detection zone, a high vehicle height response wave SS1 from the high vehicle height transceiver 11 is generated by the high vehicle height train 1 as shown in FIG. It is blocked and cannot be received by the high vehicle height receiver 13. Similarly, the low vehicle height response wave SS2 from the low vehicle height transceiver 12 is also blocked by the high vehicle height train 1 and cannot be received by the low vehicle height receiver 14. Instead, the high vehicle height receiver 13 receives the high vehicle height response wave SS3 from the high vehicle height vehicle transmitter / receiver 17. The high vehicle height on-board response wave SS3 is obtained by the high vehicle height on-vehicle transmitter / receiver 17 receiving the synchronization signal S from the antenna 15a, data modulating the synchronization signal S with the high vehicle height specific information ID-3H, It is generated by spreading modulation with a predetermined PN code. The high vehicle height receiver 13 receives the high vehicle height response wave SS3, spreads and demodulates it, further demodulates the data with the synchronization signal S, and outputs the high vehicle height specific information ID-3H to the signal processor 16. .

The signal processor 16 determines that the high vehicle height train 1 is present in the detection section based on the input high vehicle height specific information ID-3H.

When a train with a low vehicle height enters the detection zone, the high vehicle height response wave S11 from the high vehicle height transceiver 11 is blocked by the high vehicle height train 1 as shown in FIG. Therefore, it is received by the high vehicle height receiver 13. The high vehicle height receiver 13 receives the high vehicle height response wave S <b> 11, spreads and demodulates it, further demodulates the data with the synchronization signal S and outputs the high vehicle height specific information ID- 1 to the signal processor 16.

However, the low vehicle height response wave S12 from the low vehicle height transceiver 12 is blocked by the high vehicle height train 1 and cannot be received by the low vehicle height receiver 14. Instead, the low vehicle height receiver 14 receives the low vehicle height response wave SS4 from the low vehicle height vehicle transmitter / receiver 18. The low vehicle height on-vehicle response wave SS4 is received by the low vehicle height on-vehicle transmitter / receiver 18 that receives the synchronization signal S from the antenna 15a, and data-modulates the synchronization signal S with the low vehicle height specific information ID-3L. It is generated by spreading modulation with a predetermined PN code. The low vehicle height receiver 14 receives the low vehicle height on-board response wave SS4, spreads and demodulates it, further demodulates the data with the synchronization signal S, and outputs low vehicle height specific information ID-3L to the signal processor 16. .

The signal processor 16 determines that the low vehicle height train 2 is present in the detection section based on the input high vehicle height specific information ID-1 and low vehicle height specific information ID-3L. .

The configuration of the first transmitter / receiver, the on-vehicle transmitter / receiver, and the second transmitter / receiver described above is, for example, as follows.

That is, the first transmitter / receiver 4 for transmitting a high vehicle height response wave and a low vehicle height response wave from the high vehicle height transmission antenna 39A and the low vehicle height transmission antenna 39B installed on one side of the track is shown in FIG. 2, a synchronization signal receiving unit 32 that receives the synchronization signal S via the reception antenna 31, and a synchronization control unit 33 that controls the fundamental wave generation units 34 </ b> A and 34 </ b> B so as to generate a fundamental wave synchronized with the synchronization signal S. The data modulation unit 35A that modulates the fundamental wave synchronized with the synchronization signal S with the high vehicle height specific information ID-1 and the wideband code modulation of the data modulation wave of the data modulation unit 35A with the PN code of the PN code generation unit 36A The wideband code modulation unit 37A and the high vehicle high response wave transmission unit 38A that transmits the wideband code modulation wave of the wideband code modulation unit 37A, that is, the high vehicle high response wave SS1 from the transmission antenna 39A are provided. The transmission antenna 39A is installed at a column position corresponding to the vehicle height of the high vehicle height train to be detected.

The first transmitter / receiver 4 further includes a data modulation unit 35B that modulates the fundamental wave synchronized with the synchronization signal S with the low vehicle height specific information ID-2, and a data modulation wave of the data modulation unit 35B that is a PN code generation unit 36B. A wideband code modulation unit 37B that performs wideband code modulation with the PN code of the wideband code modulation wave of the wideband code modulation unit 37B, that is, a high vehicle high response wave transmission unit 38B that transmits the low vehicle height response wave SS2 from the transmission antenna 39B. Prepare. The transmission antenna 39B is installed at a column position corresponding to the vehicle height of the low vehicle height train to be detected.

Next, the second transceiver 5 that receives the high vehicle height response wave SS1 and the low vehicle height response wave SS2 from the high vehicle height reception antenna 41A and the low vehicle height reception antenna 41B installed on the other side of the track, respectively. 3 includes a synchronization signal generation unit 47 that generates the synchronization signal S and a synchronization signal transmission unit 48 that transmits the synchronization signal S from the transmission antenna 49.

The second transmitter / receiver 5 includes a high vehicle high response wave reception unit 42A and a PN code generation unit 44A that receive the high vehicle high response wave SS1 transmitted from the transmission antenna 39A of the first transmitter / receiver 4 using the reception antenna 41A. The broadband code demodulator 43A that performs broadband code demodulation using the PN code and the fundamental wave synchronized with the synchronization signal S from the fundamental wave generator 46A, and the data demodulated from the broadband code demodulated wave that is the output wave of the broadband code demodulator 43A And a data demodulator 45A for outputting the high vehicle height specific information ID-1. The receiving antenna 41A is installed at a column position corresponding to the vehicle height of the high vehicle height train to be detected.

The second transceiver 5 further includes a low vehicle high response wave receiving unit 42B and a PN code generating unit 44B that receive the low vehicle high response wave SS2 transmitted from the transmission antenna 39B of the first transmitter / receiver 4 using the reception antenna 41B. The wideband code demodulator 43B that performs wideband code demodulation using the PN code and the fundamental wave synchronized with the synchronization signal S from the fundamental wave generator 46B, and the data demodulated from the wideband code demodulated wave that is the output wave of the wideband code demodulator 43B And a data demodulator 45B for outputting the low vehicle height specific information ID-2. The reception antenna 41B is installed at a column position corresponding to the vehicle height of the low vehicle height train to be detected.

Next, the first onboard response wave SS31H and the second onboard response wave SS32H are transmitted from the first onboard response wave transmission antenna 59A and the second onboard response wave transmission antenna 59B installed in the high vehicle height train, respectively. As shown in FIG. 4, the on-vehicle transmitter / receiver 17 for the high-altitude vehicle receives a synchronization signal S via a reception antenna 51, and generates a fundamental wave synchronized with the synchronization signal S. A synchronization control unit 53 that controls the generation units 54A and 54B, a data modulation unit 55A that modulates data of a fundamental wave synchronized with the synchronization signal S with the first vehicle specific information ID-31H, and a data modulation wave of the data modulation unit 55A that is PN A wideband code modulation unit 57A that performs wideband code modulation with the PN code of the code generation unit 56A, and a wideband code modulation wave of the wideband code modulation unit 57A, that is, the first onboard response wave SS31H is transmitted to the transmission antenna 59. Comprising a first on-board response wave transmission unit 58A which transmits the.

The on-vehicle transmitter / receiver 17 further includes a data modulation unit 55B that modulates the fundamental wave synchronized with the synchronization signal S with the second on-vehicle unique information ID-32H, and a PN code for the data modulation wave of the data modulation unit 55B. The wideband code modulation unit 57B that performs wideband code modulation with the PN code of the generation unit 56B, and the wideband code modulation wave of the wideband code modulation unit 57B, that is, the second onboard response wave SS32H that is transmitted from the transmission antenna 59B A wave transmitter 58B is provided.

The first on-vehicle response wave SS31H is received by the high vehicle height response wave receiving unit 42A via the reception antenna 41A of the second transceiver 5. Then, similarly to the processing of the high vehicle high response wave SS1, the first vehicle specific information ID-31H is output through the data demodulation by the wideband code demodulation unit 43A and the data demodulation by the data modulation unit 45A in order.

The second on-vehicle response wave SS32H is received by the high vehicle height response wave receiving unit 42A via the reception antenna 41A of the second transceiver 5. Then, similarly to the processing of the high vehicle high response wave SS1, the second vehicle specific information ID-32H is output through the data demodulation by the wideband code demodulation unit 43A and the data demodulation by the data modulation unit 45A in order.

The first on-board response wave transmitting antenna 59A and the second on-board response wave transmitting antenna 59B of the high-vehicle on-vehicle transmitter / receiver 17 are respectively installed in the front vehicle and the rear vehicle of the train formation. According to such an antenna arrangement, it is possible to detect not only the train line but also the approach and advance of the train to the detection section.

The first on-board response wave transmitting antenna 59A and the second on-board response wave transmitting antenna 59B of the high-vehicle on-vehicle transceiver 17 may be installed adjacent to the vehicle in front of or behind the train, respectively. . According to such an antenna arrangement, not only the train line but also the traveling direction of the train to the detection section can be detected.

Finally, the first onboard response wave SS41L and the second onboard response wave SS42L are transmitted from the first onboard response wave transmission antenna and the second onboard response wave transmission antenna installed in the low vehicle height train, respectively. The on-vehicle transmitter / receiver 18 has the same configuration as the above-described on-vehicle transmitter / receiver 17. In addition, the arrangement of the first onboard response wave transmitting antenna and the second onboard response wave transmitting antenna of the low vehicle height train in the train formation is performed in the same manner as the above-described high vehicle height onboard transceiver 17. .

The first on-vehicle response wave SS41L is received by the low vehicle height response wave receiving unit 42B via the reception antenna 41B of the second transceiver 5. Then, similarly to the processing of the low vehicle high response wave SS2, the second vehicle specific information ID-41L is output through the data demodulation by the wideband code demodulation unit 43B and the data demodulation by the data modulation unit 45B in this order.

The second on-vehicle response wave SS42L is received by the low vehicle height response wave receiving unit 42B via the reception antenna 41B of the second transceiver 5. Then, similarly to the processing of the low vehicle high response wave SS2, the second vehicle specific information ID-42L is output through the data demodulation by the wideband code demodulation unit 43B and the data demodulation by the data modulation unit 45A in this order.

It is a schematic diagram of a train detection system of one example of the present invention. It is an example of the block block diagram of the 1st transmitter / receiver used for the train detection system of one Example of this invention. It is an example of the block block diagram of the 2nd transmitter / receiver used for the train detection system of one Example of this invention. It is an example of the block block diagram of the on-vehicle transceiver used for the train detection system of one Example of this invention. A conventional communication cut-off train detection system for high-height trains and a conventional communication cut-off train detection system for low-height trains were constructed, and these two systems were installed adjacent to each other. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 High vehicle height train 2 Low vehicle height train 3 Track 4 1st transmitter / receiver 5 2nd transmitter / receiver 6,7 Posts with cables 8,9 Post 11 High vehicle height transmitter / receiver 12 Low vehicle height transmitter / receiver 13 High vehicle height Receiver 14 for low vehicle height 15 Sync signal transmitter 15a Sync signal transmitting antenna 16 Signal processor 17 High vehicle height transmitter / receiver 18 Low vehicle height vehicle transmitter / receiver 21 High vehicle height train responder 22 Low Vehicle height train responder 23 Vehicle height train interrogator 24 Vehicle height train interrogator 26 Signal processor 31 Synchronization signal reception antenna 32 Synchronization signal reception unit 33 Synchronization control units 34A and 34B Fundamental wave generation units 35A and 35B Data modulation unit 36A, 35B PN code generation unit 37A, 37B Wideband code modulation unit 38A High vehicle high response wave transmission unit 38B Low vehicle high response wave transmission unit 39A High vehicle high response wave transmission antenna 39B Low vehicle high response wave transmission antenna 4 A High vehicle high response wave receiving antenna 41B Low vehicle high response wave receiving antenna 42A High vehicle high response wave receiving unit 42B Low vehicle high response wave receiving unit 43 Synchronization control unit 43A, 43B Wideband code demodulating unit 44A, 44B PN code generating unit 45A, 45B Data demodulation unit 46A, 46B Fundamental wave generation unit 47 Synchronization signal generation unit 48 Synchronization signal transmission unit 49 Synchronization signal transmission antenna 50 Signal processing unit 51 Synchronization signal reception antenna 52 Synchronization signal reception unit 53 Synchronization control unit 54A, 54B Basic Wave generators 55A, 55B Data modulators 56A, 55B PN code generators 57A, 57B Wideband code modulators 58A First onboard response wave transmitter 58B Second onboard response wave transmitter 59A First onboard response wave transmission antenna 59B Second vehicle response wave transmitting antenna

Claims (7)

A first transmitter / receiver installed on one side of the track, a second transmitter / receiver installed opposite to the other side of the track to constantly transmit the synchronization signal S, an on-vehicle transmitter / receiver, and an output from the second transmitter / receiver It is a train detection system composed of a signal processor that determines a train line etc. based on a signal,
The first transmitter / receiver receives a synchronization signal S, a synchronization signal receiving unit, and modulates the received synchronization signal S with high vehicle height specific information ID-1 to constantly transmit a high vehicle height response wave SS1. A wave transmission unit, and a low vehicle height response wave transmission unit that constantly modulates the low vehicle height response wave SS2 by modulating the received synchronization signal S with the low vehicle height specific information ID-2,
The on-vehicle transmission / reception unit includes a synchronization signal on-vehicle reception unit that receives the synchronization signal S, and an on-vehicle response wave that modulates the received synchronization signal S with the on-vehicle unique information ID-3 and transmits an on-vehicle response wave SS3. That it is composed of a transmitter, and
The second transmitter / receiver is a synchronization signal transmitter that constantly transmits a synchronization signal S, a high vehicle height response that receives the high vehicle height response wave, demodulates the synchronization signal S, and outputs high vehicle height specific information ID-1 A wave receiving unit, a low vehicle high response wave receiving unit that receives the low vehicle high response wave, demodulates with the synchronization signal S, and outputs low vehicle height specific information ID-2, receives the on-vehicle response wave, and receives the synchronization signal S A train detection system comprising: an on-vehicle response wave receiving unit that demodulates the vehicle and outputs the on-vehicle unique information ID-3. The train detection system according to claim 1, wherein the high vehicle high response wave receiving unit or the low vehicle high response wave receiving unit is also used as the on-vehicle response wave receiving unit. A first transmitter / receiver installed on one side of the track, a second transmitter / receiver installed opposite to the other side of the track to constantly transmit the synchronization signal S, an on-board transmitter / receiver, and an output from the second transmitter / receiver It is a train detection system composed of a signal processor that determines a train line etc. based on a signal,
The first transmitter / receiver receives a synchronization signal S, a synchronization signal receiving unit, and modulates the received synchronization signal S with high vehicle height specific information ID-1 to constantly transmit a high vehicle height response wave SS1. A wave transmission unit, and a low vehicle height response wave transmission unit that constantly modulates the low vehicle height response wave SS2 by modulating the received synchronization signal S with the low vehicle height specific information ID-2,
The on-vehicle transmitter / receiver includes a synchronization signal on-vehicle receiving unit that receives the synchronization signal S, an on-vehicle device that modulates the received synchronization signal S with the first on-vehicle unique information ID-31 and transmits a first on-vehicle response wave SS31. The first response wave transmission unit and the on-vehicle second response wave transmission unit that modulates the received synchronization signal S with the on-vehicle second unique information ID-32 and transmits the on-vehicle second response wave SS32. And
The second transmitter / receiver is a synchronization signal transmitter that constantly transmits a synchronization signal S, a high vehicle height response that receives the high vehicle height response wave, demodulates the synchronization signal S, and outputs high vehicle height specific information ID-1 Wave receiving unit, low vehicle height response wave SS2 received, demodulated by synchronization signal S, low vehicle height response wave receiving unit outputting low vehicle height specific information ID-2, on-vehicle first response wave SS31 received and synchronized On-vehicle first response wave receiving unit that demodulates with signal S and outputs first on-vehicle unique information ID-31, on-vehicle second response wave SS32 is received, demodulated with synchronization signal S, and on-vehicle second unique information ID- A train detection system comprising: an on-vehicle second response wave receiving unit that outputs 32. 4. The train detection system according to claim 3, wherein the on-vehicle first response wave transmission unit and the on-vehicle second response wave transmission unit are respectively installed in a front vehicle and a rear vehicle of train formation. . The said on-vehicle 1st response wave transmission part and the said on-vehicle 2nd response wave transmission part are each installed adjacent to the vehicle of the front of a train organization, or a back vehicle, respectively. Train detection system. The train detection system according to claim 3, wherein the on-vehicle first response wave receiver and the on-vehicle second response wave receiver are combined. The high vehicle high response wave receiving unit or the low vehicle high response wave receiving unit is combined with the on-vehicle first response wave receiving unit and the on-vehicle second response wave receiving unit. The train detection system according to 3 or 5.

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