JP2012201121A - Device and method for detecting train - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a train detecting device that can properly detect a train by properly transmitting and receiving train detecting signals even in a route such that a distance between stations and a track circuit are long.SOLUTION: A starting point and an end point of each track circuit T serve as a starting point transmitting end and an end point transmitting end, respectively, to which a train detecting signal from a transmission circuit 3 is supplied, and a mid point of each track circuit T serves as a receiving end from which the train detecting signal is received. The train detecting signal is transmitted to the starting point transmitting end and the end point transmitting end of each track circuit T by the transmission circuit 3, and the train detecting signal is received from the receiving end by a parallel reception circuit 8, in this manner, presence or absence of the train in the track circuit T is detected depending upon whether the train detecting signal is received.

Description

  The present invention relates to a train detection device and a train detection method, and in particular, uses a track circuit, and properly transmits and receives train detection signals and performs proper train detection even on a route with a long station middle and a long track circuit length. The present invention relates to a train detection device and a train detection method.

  Conventionally, a train detection device using a track circuit detects a train having a predetermined frequency on the starting end side of a track circuit formed by dividing a rail on which a train travels into a predetermined length along a direction in which the train travels. While being able to transmit a signal, the signal can be received from the end side of the track circuit.

  And when the train detection signal supplied from the end side of the track circuit to the start end side of the track circuit is received, it is detected that there is no train in the track circuit, and when the train detection signal is not received It is designed to detect the presence of a train.

  As a train detection device using such a conventional track circuit, for example, a train exists by adding digital information to a train detection signal and applying it to a plurality of track circuits and receiving levels received from the plurality of track circuits. And a technique for detecting a track circuit failure based on digital information extracted from a received signal is disclosed (see Patent Document 1).

JP 2007-196858 A

  However, since the middle of the station is long in a railroad in a quiet section, the track circuit length becomes extremely long. Therefore, as in the prior art, when transmitting to the beginning of each track circuit and receiving at the end, there is a problem that the loss of train detection signals increases and proper train detection cannot be performed. .

  Therefore, in such a track circuit with a long station middle, conventionally, a distributed track circuit (such as a long track circuit) that can control a long track is separately used, or each track circuit length is increased by dividing the track more. I was trying to shorten it. However, distributed track circuit devices are old in design and tend to be difficult to supply parts, and if the track circuit is divided more, it is necessary to provide rail insulation, which costs construction costs have.

  In addition, a method has been developed in which train detection signals are transmitted from the center of each track circuit and received at both ends of each track circuit, but it is necessary to transmit the train detection signals to both ends of each track circuit. Has the problem of causing

  The present invention has been made in view of the above points, and a train detection device capable of appropriately transmitting and receiving a train detection signal and performing proper train detection even on a route having a long station middle and a long track circuit length. And it aims at providing a train detection method.

In order to achieve the above object, a train detection apparatus according to the invention of claim 1 transmits a predetermined train detection signal to a plurality of track circuits while scanning each track circuit, and the train from each track circuit. A transmission / reception circuit for receiving a detection signal;
A detection circuit for detecting the presence or absence of a train in the track circuit according to the presence or absence of reception of the transmitted predetermined train detection signal;
The starting and terminating ends of each track circuit are a transmitting end and a terminating side transmitting end for supplying a train detection signal by the transmission / reception circuit, and a midway portion of each track circuit is a receiving end that receives the train detection signal. ,
The transmission / reception circuit transmits the train detection signal to a start side transmission end and a termination side transmission end of each track circuit, and receives the train detection signal from the reception end.

  According to a second aspect of the present invention, in the first aspect, transmission / reception of a train detection signal to the track circuit is performed every odd cycle and even cycle, and the train detection signal has a different frequency in the odd cycle and even cycle. It is transmitted by.

  According to a third aspect of the present invention, in the first or second aspect, the train detection signals transmitted to the start-end transmission end and the end-end transmission end are train detection signals having different frequencies, respectively, and the start-end transmission is performed. A train detection signal is simultaneously transmitted to the end and the terminal-side transmission end.

According to a fourth aspect of the present invention, there is provided a train detection method in which a start end and a termination end of a plurality of track circuits are used as a start end transmission end and a termination end transmission end for supplying a train detection signal by a transmission / reception circuit. A midway part is a receiving end that receives the train detection signal,
The transmission / reception circuit transmits the train detection signal to the start side transmission end and the termination side transmission end of each track circuit while scanning each track circuit, and receives the train detection signal from the reception end,
The presence or absence of a train in the track circuit is detected by the presence or absence of reception of the predetermined train detection signal transmitted by the detection circuit.

  According to a fifth aspect of the present invention, in the fourth aspect, the train detection signal is transmitted to and received from the track circuit every odd cycle and even cycle, and the train detection signal has a different frequency in the odd cycle and even cycle. It is transmitted by.

  According to a sixth aspect of the present invention, in the fourth or fifth aspect, the train detection signals transmitted to the start-end transmission end and the end-end transmission end are train detection signals having different frequencies, respectively, and the start-end transmission is performed. A train detection signal is simultaneously transmitted to the end and the terminal-side transmission end.

  According to the first aspect of the present invention, the train detection signal is transmitted to the starting end side transmitting end and the terminal end side transmitting end of each track circuit, and the train signal is received from the receiving end of the track circuit, thereby determining the presence or absence of the train. Because it detects, the same effect as when one track circuit is divided into two can be obtained, and even when the track circuit length is long, loss of the train detection signal is prevented, and the proper train Detection can be performed. Moreover, since the train detection signal is transmitted from both ends of each track circuit, loss of the train detection signal in the track circuit can be reliably prevented.

  According to the invention according to claim 2, because transmission and reception of the train detection signal to the track circuit is performed every odd cycle and even cycle, and train detection signals of different frequencies are transmitted to the odd cycle and even cycle, In each cycle, the train detection signal can be reliably identified.

  According to the invention of claim 3, the train detection signals transmitted to the start side transmission end and the termination side transmission end are train detection signals of different frequencies, and the train detection signal is simultaneously detected at the start side transmission end and the termination side transmission end. Since a signal is transmitted, even if a train detection signal is transmitted simultaneously to the start-end transmission end and the end-end transmission end in one track circuit, each train detection signal is reliably identified and the start-end transmission is performed. It is possible to simultaneously detect the presence or absence of a train in the track circuit between the end and the receiving end and in the track circuit between the end-side transmitting end and the receiving end.

  According to the invention which concerns on Claim 4, while transmitting a train detection signal to the starting end transmission end of each track circuit, and a termination | terminus transmission end, and receiving a train signal from the receiving end of a track circuit, the presence or absence of a train is determined. Because it detects, the same effect as when one track circuit is divided into two can be obtained, and even when the track circuit length is long, loss of the train detection signal is prevented, and the proper train Detection can be performed. Moreover, since the train detection signal is transmitted from both ends of each track circuit, loss of the train detection signal in the track circuit can be reliably prevented.

  According to the invention according to claim 5, because transmission and reception of the train detection signal to the track circuit is performed every odd cycle and even cycle, and train detection signals of different frequencies are transmitted to the odd cycle and even cycle, In each cycle, the train detection signal can be reliably identified.

According to the invention which concerns on Claim 6, the train detection signal transmitted to the start side transmission end and the termination side transmission end is a train detection signal of a different frequency, respectively, and the train detection signal is simultaneously detected at the start side transmission end and the termination side transmission end. I ’m trying to send a signal,
In one track circuit, even when a train detection signal is simultaneously transmitted to the start side transmission end and the end side transmission end, each train detection signal is reliably identified, and the track circuit between the start side transmission end and the reception end In addition, it is possible to simultaneously detect the presence or absence of a train in the track circuit between the terminal side transmitting end and the receiving end.

It is a schematic structure figure showing an embodiment of a train detection device concerning the present invention. It is explanatory drawing which shows the flow of the train detection signal in embodiment of the train detection apparatus which concerns on this invention. It is a transmission-and-reception conceptual diagram of the train detection apparatus in embodiment of the train detection apparatus which concerns on this invention. It is explanatory drawing which shows judgment of the presence or absence of a train based on the train detection signal in embodiment of the train detection apparatus which concerns on this invention. It is explanatory drawing which shows judgment of the presence or absence of a train based on the train detection signal in the modification of the train detection apparatus which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic configuration diagram illustrating an embodiment of a train detection device according to the present invention. The train detection device 1 of the present embodiment has a predetermined rail along a travel direction of the train 2 on a rail that the train 2 travels. The length is divided into a plurality (6 in the present embodiment), and the divided rails are applied to the track circuits 1T to 6T functioning as a part of the electric circuit. Both ends of each track circuit T are a transmission end on the start side and a transmission end on the end side, and the center of each track circuit T is a reception end. The receiving end is not limited to the center of the track circuit T, and may be set at any position.

  The train detection device 1 is provided with a transmission circuit 3 that generates two types of train detection signals f1, f2 having different frequencies, and the transmission circuit 3 transmits transmission / reception timing signals of the train detection signals f1, f2. A transmission / reception timing control circuit 4 for outputting to the circuit 3 is connected.

  Further, the train detection device 1 is provided with a transmission switching circuit 5 for sequentially switching and transmitting the train detection signals f1 and f2 input from the transmission circuit 3 to the other end side transmission end or the end side transmission end of each track circuit T. The transmission switching circuit 5 is configured so that the track circuits 1T to 6T can be scanned by the slot-like train detection signals f1 and f2 formed in a predetermined time slot.

  In this embodiment, as shown in FIGS. 2 and 3, the track circuits 1T, 2T, 3T, 4T, 5T, and 6T are each formed in one block, and an odd cycle and an even cycle are provided for each block. Is configured to scan repeatedly. In the present embodiment, in the odd cycle, first, the start detection transmission switch 6 of the track circuit 1T is turned ON, whereby the train detection signal f1 is supplied to the start end side transmission end, and then the end transmission of the track circuit 1T is performed. By turning on the trust switch 7, the train detection signal f1 is supplied to the terminal side transmission end. Next, the train detection signal f1 is detected at the start-end side transmission end by turning on the start-end transmission switch 6 of the track circuit 2T, and the train detection signal is detected at the end-side transmission end by turning on the end transmission switch 7 of the track circuit 2T. The signal f1 is sequentially supplied, and then sequentially supplied to the track circuits 3T, 4T, 5T, and 6T. In the next even cycle, the train detection signal f2 is supplied to the start side transmission end of the track circuit 1T, and the train detection signal f2 is supplied to the end side transmission end of the track circuit 1T.

  Further, the train detection device 1 is provided with a parallel receiving circuit 8 that receives signals from the receiving ends of the track circuits 1T to 6T in parallel, and the parallel receiving circuit 8 shows the received signals. A reception signal verification circuit 9 is connected to verify whether the reception signal is a train detection signal using a filter circuit that is not present.

  Further, a detection circuit 10 is connected to the reception signal matching circuit 9. The detection circuit 10 receives the verification signal from the reception signal verification circuit 9 and the timing signal from the transmission / reception timing control circuit 4, and the detection circuit 10 detects the transmission timing of the train detection signal. Synchronously, it is configured to detect the presence or absence of a train, the presence or absence of an interfering signal, and a decrease in the level of a received signal.

  In this embodiment, the train detection signal f1 is detected by the detection circuit 10 via the parallel reception circuit 8 and the reception signal collation circuit 9 after the train detection signal is supplied to the start side transmission end, and the termination When the train detection signal f1 is detected by the detection circuit 10 via the parallel reception circuit 8 and the reception signal verification circuit 9 after supplying the train detection signal to the side transmission end, there is a train in the track circuit T. It is determined not to. On the other hand, if the train detection signal f1 is not detected by the detection circuit 10 via the parallel reception circuit 8 and the reception signal collation circuit 9 after supplying the train detection signal to the start side transmission end or the termination side transmission end, the track It is determined that a train exists in the circuit T. Furthermore, when the train detection signal is detected even though the train detection signal is not supplied to the start side transmission end or the termination side transmission end, leakage from the adjacent track circuit T or from the adjacent track It is determined that the interference wave is due to leakage or the like.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 2, in the odd cycle, first, the train detection signal f1 is supplied to the transmission end of the track circuit 1T by operating the transmission circuit 3, the transmission switching circuit 5, and the transmission / reception end switching circuit 6. . Subsequently, the train detection signal f1 is supplied to the terminal side transmission end of the track circuit 1T. Then, the train detection signal f1 is sequentially supplied to the track circuits 2T, 3T, 4T, 5T, and 6T.

  Then, as indicated by item number 1 and item number 2 in FIG. 4, while the train detection signal f <b> 1 is being supplied to the starting end side transmission end of the track circuit 11, the parallel reception circuit 8 at the reception end of the track circuit 11. While the train detection signal f1 is detected by the detection circuit 10 via the reception signal matching circuit 9, and the train detection signal f1 is supplied to the terminal side transmission end of the track circuit 1T, the reception of the track circuit T1 is received. On the other hand, when the train detection signal f1 is detected by the detection circuit 10 via the parallel reception circuit 8 and the reception signal verification circuit 9, it is determined that the train 2 does not exist on the track circuit 1T.

  On the other hand, as shown in Item No. 3 or Item No. 4 in FIG. 4, while the train detection signal f1 is supplied to the start side transmission end or the end side transmission end of the track circuit 1T, on the reception side of the track circuit 1T. When the train detection signal f1 is not detected, it is determined that the train 2 exists on the track circuit 1T.

  In addition, as shown to the item number 5 of FIG. 4, it is a jamming wave when a train detection signal is detected although the train detection signal is not supplied to the start side transmission end or the termination side transmission end. Judge.

  By performing these operations for each track circuit 2T, 3T, to 6T, the presence or absence of the train 2 in each track circuit 2T, 3T to 6T can be detected.

  Next, when the odd cycle ends, in the even cycle, the train detection signal f2 is supplied to the start side transmission end of the track circuit 1T, and then the train detection signal f2 is supplied to the end side transmission end of the track circuit 1T. . Then, the train detection signal f2 is sequentially supplied to the track circuits 2T, 3T, 4T, 5T, and 6T, and the presence / absence of the train 2 in each track circuit 1T, 2T, and 6T is determined as in the case of the odd cycle. Is.

  As described above, in this embodiment, the train detection signal is transmitted to the start side transmission end and the end side transmission end of each track circuit, and the train signal is received from the reception end of the track circuit T. Because the same effect as when one track circuit T is divided into two can be obtained, even if the track circuit length is long, the loss of the train detection signal can be prevented. Appropriate train detection can be performed. Moreover, since a train detection signal is transmitted from both ends of each track circuit T, loss of the train detection signal in the track circuit T can be reliably prevented.

  In the above-described embodiment, the train detection signal is transmitted to the starting end transmitting end and the terminating end transmitting end of each track circuit T while shifting the timing, but transmitted to the starting end transmitting end and the terminating end transmitting end. The train detection signals may be set to have different frequencies, and the train detection signals having different frequencies may be simultaneously transmitted to the start side transmission end and the end side transmission end. By doing in this way, even when a train detection signal is transmitted simultaneously to the start side transmission end and the termination side transmission end in one track circuit T, each train detection signal is reliably identified, and the start end side transmission end It is possible to simultaneously detect the presence or absence of a train in the track circuit T between the receiving end and the track circuit T between the terminal side transmitting end and the receiving end.

  Further, in the present invention, when the train detection signal f1 at the receiving end when the train detection signal f1 is supplied to the transmission end of the track circuit and the train detection signal f1 is supplied to the transmission end of the track circuit. By obtaining the difference from the train detection signal f1 at the receiving end of the vehicle, it is possible to determine a finer train position based on the magnitude of the difference between the vehicle detection signals.

  That is, as shown in Item No. 1 and Item No. 2 in FIG. 5, when the train detection signal is supplied to the starting end side transmission end of the track circuit, the train detection signal is received at the receiving end, and the end side transmission of the track circuit is performed. When the train detection signal is supplied to the end, the reception end receives the train detection signal. When the difference between these train detection signals is 0, it is determined that there is no train on the track.

  Further, as shown in Item No. 3 and Item No. 4 in FIG. 5, when the train detection signal is supplied to the starting end side transmission end of the track circuit, the receiving end does not receive the train detection signal, and the end of the track circuit is transmitted. When the train detection signal is supplied to the end and the reception end does not receive the train detection signal, and the difference between these train detection signals is smaller than the preset threshold value, the start side transmission end and the end side It is determined that there is a train near the center of the transmission end.

  Further, as shown in Item No. 5 and Item No. 6 in FIG. 5, when the train detection signal is supplied to the starting end side transmission end of the track circuit, the receiving end does not receive the train detection signal, and the end side transmission of the track circuit is performed. When the train detection signal is supplied to the end and the train detection signal is not received at the reception end, and the difference between these train detection signals is larger than a preset threshold value, the difference is (−). If there is, it is determined that the train exists near the transmission end from the reception end, and if the difference is (+), it can be determined that the train exists near the transmission end from the reception end. .

  The present invention is not limited to the above-described embodiment, and various modifications can be made based on the gist of the present invention.

1T to 6T Track circuit 1 Train detection device 2 Train 3 Transmission circuit 4 Transmission / reception timing control circuit 5 Transmission switching circuit 6 Start-end transmission switch 7 Termination-side transmission switch 8 Parallel reception circuit 9 Reception signal verification circuit 10 Detection circuit

Claims (6)

Transmitting and transmitting a predetermined train detection signal to a plurality of track circuits while scanning each track circuit, and receiving the train detection signal from each track circuit;
A detection circuit for detecting the presence or absence of a train in the track circuit according to the presence or absence of reception of the transmitted predetermined train detection signal;
The starting and terminating ends of each track circuit are a transmitting end and a terminating side transmitting end for supplying a train detection signal by the transmission / reception circuit, and a midway portion of each track circuit is a receiving end that receives the train detection signal. ,
The train detection device, wherein the transmission / reception circuit transmits the train detection signal to a start side transmission end and a termination side transmission end of each track circuit and receives the train detection signal from the reception end.   The train detection signal is transmitted to and received from the track circuit every odd cycle and even cycle, and the train detection signal is transmitted at different frequencies in the odd cycle and even cycle. The train detection device described.   The train detection signals transmitted to the start side transmission end and the termination side transmission end are train detection signals having different frequencies, respectively, and the train detection signal is simultaneously transmitted to the start side transmission end and the termination side transmission end. The train detection device according to claim 1, wherein the train detection device is a train detection device. With the start and end of the plurality of track circuits as a transmission end for the start end and a terminal side transmission end for supplying a train detection signal by a transmission / reception circuit, and a midway portion of each track circuit as a reception end for receiving the train detection signal,
The transmission / reception circuit transmits the train detection signal to the start side transmission end and the termination side transmission end of each track circuit while scanning each track circuit, and receives the train detection signal from the reception end,
A train detection device, wherein the presence or absence of a train in the track circuit is detected by a detection circuit based on whether or not the transmitted predetermined train detection signal is received.   5. The train detection signal is transmitted to and received from the track circuit every odd cycle and even cycle, and the train detection signal is transmitted at a different frequency in the odd cycle and even cycle. The described train detection method.   The train detection signals transmitted to the start side transmission end and the termination side transmission end are train detection signals having different frequencies, respectively, and the train detection signal is simultaneously transmitted to the start side transmission end and the termination side transmission end. The train detection method according to claim 4 or 5, wherein

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