JPH10175548A - Train detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the occurrence of a trouble to the signal input end of a receiving device to receive a train detecting signal through simple equipment. SOLUTION: A train detecting signal transmitted to a track circuit 2T is transmitted to the other end of the track circuit 2T through a rail and inputted to a superposed apparatus 6. The superposed apparatus 6 always inputs a signal for check, having a frequency zone different from that of the train detecting signal, from a check signal generator 7, and the train detecting signal and the signal for check are transmitted in a superposed state to the input part 9 of a receiving device 8. A signal deciding part 15 for a signal for check of a receiving device 8 decides that an input part 9 and an A/D converter 10 are normally operated and the train detecting signal is normally inputted as long as the signal for check is outputted from a check signal filter 14 regardless of the presence of the train detecting signal. When the signal for check is not outputted from a check signal filter, it is decided that the input part 9 and the A/D converter 10 fail in operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train detection apparatus for detecting a train using a rail, and more particularly to a failure detection of a signal input terminal of a reception apparatus for receiving a train detection signal.

[0002]

2. Description of the Related Art A track circuit for detecting a train is a track circuit.
A train detection signal output from the transmission device is input to the reception device via the rail by using an electric circuit. When a train detection signal is input to the receiving device, it is determined that there is no train in that section, and the two rails are electrically short-circuited on the axle of the train, so that no train detecting signal is input to the receiving device. Sometimes it is determined that there is a train in that section. The receiving device used for this train detection is also microelectronics, and by adding a self-diagnosis function by program processing using a microcomputer, it is possible to self-detect the failure of the device, and to control it safely on failure. I have.

[0003]

In the receiving apparatus having the self-diagnosis function as described above, even if a train detection signal is sent from the rail to the receiving apparatus, if the input terminal of the receiving apparatus has a failure, the train The detection signal is not input to the receiving device, and the state is the same as when the train is on the track circuit, and it becomes impossible to distinguish whether there is a failure at the input end or whether the train is on the track circuit. For this reason, when a failure has occurred at the input end of the receiving device, the failure cannot be detected despite the self-diagnosis function.

[0004] The failure of the input terminal of the receiver is detected by providing two receivers, comparing the operation of both receivers, and taking into account the passage of time in the train detection state of the front and rear track circuits. However, in this case, the equipment for failure detection is large and complicated.

The present invention has been made in order to solve the above-mentioned disadvantages, and an object of the present invention is to provide a train detection device capable of detecting a failure of a signal input terminal of a receiving device for receiving a train detection signal with simple equipment. It is the purpose.

[0006]

A train detecting apparatus according to the present invention has a transmitting device, a check signal generator, a superimposing device, and a receiving device. The transmitting device detects the presence or absence of a train in each track circuit. A signal is sent to one end of the track circuit, the check signal generator generates a check signal in a frequency band different from the train detect signal, and the superimposer is a train detect signal sent from the other end of the track circuit. And the control signal generated by the control signal generator are superimposed, and the superimposed signal is sent to the input terminal of the receiving device, and the receiving device inputs the signal superimposed by the superposition device, and the superimposed train detection signal and the control signal And the presence or absence of the separated inspection signal is determined to detect the presence or absence of a failure at the input end.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The train detecting device of the present invention
Transmitter connected to one end of the track circuit using a matching transformer via a matching transformer, a superposition device connected to the other end of the track circuit via a matching transformer, and the other of the superposition device And a receiving device connected to the output side of the superimposer. The receiving device detects the presence or absence of the train detection signal sent from the transmitting device to the track circuit, and determines whether or not the train is on the track circuit. The input unit, the A / D converter, and the train detection signal filter A signal discriminating section, a train detecting section, a check signal filter, a signal discriminating section, and a failure judging section.

The train detection signal transmitted from the transmitting device to one end of the track circuit is sent to the other end of the track circuit via the rail and input to the superimposer. This superimposer always receives a train detection signal generated by the reference signal generator and a check signal having a different frequency band, superimposes the train detection signal and the check signal, and outputs the superimposed signal to the input unit of the receiving device. Send to The input unit of the receiving device sends the input signal to the A / D converter. The A / D converter converts the transmitted signal into a digital signal and sends it to a train detection signal filter and a check signal filter. The train detection signal filter selects a train detection signal from the transmitted signals and sends it to the signal determination unit for the train detection signal. The signal determination unit determines whether there is a train detection signal sent from the train detection signal filter, and when detecting the train detection signal, sends a signal indicating the presence of the train detection signal to the train detection unit. When a signal indicating the presence of the train detection signal is sent, the train detection unit determines that the train is not on the track circuit and outputs a train absent line signal.

The reference signal filter selects a reference signal from the signals sent from the A / D converter and sends the selected signal to the signal determination unit for the reference signal. The signal determination unit for the control signal determines the presence or absence of the transmitted control signal, and sends a signal indicating the presence of the control signal to the failure determination unit when the control signal is detected. When the signal indicating the presence of the check signal is sent, the failure determination unit determines that the receiving device has normally input the train detection signal.

In this state, when the train enters the track circuit,
The train detection signal sent to the track circuit is not input to the superimposer due to the short circuit of the rail due to the axle of the train, and the train detection filter of the receiving device does not output the train detection signal. It is determined that the train is on the line. At this time, the reference signal generated by the reference signal generator is sent to the superimposer irrespective of the short circuit of the rail due to the train axle. The unit has determined that the receiving device is operating normally.

In this manner, as long as the control signal is output from the control signal filter irrespective of the presence or absence of the control signal, the input section of the receiving device and the A / D converter operate normally to generate the control signal. When it is determined that the input is normal, and the reference signal is not output from the reference signal filter, it is determined that the input unit of the receiving device or the A / D converter has failed.

[0012]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. As shown in the figure, the train detection device
A transmission device 4 connected to one end of a track circuit 2T using a network 1 via a matching transformer 3 and a superposition device connected to the other end of the track circuit 2T via a matching transformer 5 6
And an inspection signal generator 7 connected to the other input side of the superimposer 6 and a receiving device 8 connected to the output side of the superimposer 6.

The transmitting device 4 transmits a train detection signal for detecting whether or not the train 2 is on the track circuit 2T to the track circuit 2T via the matching transformer 3. The reference signal generator 7 generates a reference signal in a frequency band different from that of the train detection signal, and
Send to The superimposer 6 inputs the train detection signal transmitted to the track circuit 2T via the matching transformer 5, superimposes the input train detection signal and the control signal generated by the control signal generator 7, and outputs the superimposed signal. Send to receiving device 8.

The receiving device 8 detects the presence or absence of a train detection signal sent to the track circuit 2T and determines the presence or absence of the train 2 in the track circuit 2T. The input unit 9, the A / D converter 10, and the train It has a detection signal filter 11, a signal determination unit 12, a train detection unit 13, a check signal filter 14, a signal determination unit 15, and a failure determination unit 16. The input unit 9 inputs a signal in which the train detection signal and the check signal sent from the superimposer 6 are superimposed. The A / D converter 10 converts a signal in which the input train detection signal and the check signal are superimposed into a digital signal. The train detection signal filter 11 selects a train detection signal from the superimposed signals. The signal determination unit 12 is a train detection signal filter 11
The presence or absence of a train detection signal sent from the The train detection unit 13 determines the track circuit 2T based on the determination result of the signal determination unit 12.
The presence or absence of the train 2 is determined. The inspection signal filter 14 selects an inspection signal from the superimposed signals. Signal determination unit 15
Determines whether there is a reference signal sent from the reference signal filter 14. The failure determination unit 16 determines whether a failure has occurred in the input unit 9, the A / D converter 10, the train detection signal filter 11, and the check signal filter 14 based on the determination result of the signal determination unit 15. The input unit 9 of the receiving device 8 and A /
Other than the D converter 10, the processing is performed by the program processing of one microcomputer.

In the train detecting device constructed as described above, the train detecting signal transmitted from the transmitting device 4 to one end of the track circuit 2T is transmitted via the rail 1 to the other end of the track circuit 2T. And input to the superimposing device 6. On the other hand, the checking signal generated by the checking signal generator 7 is always input to the superimposing device 6. Then, the superimposer 6 superimposes the train detection signal transmitted from the track circuit 2T and the inspection signal transmitted from the inspection signal generator 7, and sends the superimposed signal to the input unit 9 of the receiving device 8. The input unit 9 of the receiving device 8 converts the input signal to A /
Send to D converter 10. The A / D converter 10 converts the transmitted signal into a digital signal and sends the digital signal to the train detection signal filter 11 composed of a digital filter and the inspection signal filter 14. The train detection signal filter 11 selects a train detection signal from the transmitted signals and sends it to the signal determination unit 12. The signal determination unit 12 determines the presence or absence of a train detection signal sent from the train detection signal filter 11, and when detecting the train detection signal, sends a signal of, for example, “1” level indicating the presence of the train detection signal to the train detection unit 13. When the signal of the “1” level is sent, the train detection unit 13 determines that the train 2 is not on the track circuit 2T and outputs a train absent line signal. On the other hand, the inspection signal filter 14 selects an inspection signal from the signals sent from the A / D converter 10 and sends the selected signal to the signal determination unit 15. Signal determination unit 1
Reference numeral 5 indicates the presence / absence of the transmitted reference signal. When the reference signal is detected, for example, "1" indicating the presence of the reference signal.
The level signal is sent to the failure determination unit 16. Failure determination unit 16
When the “1” level signal is transmitted, the receiving device 8 determines that the train detection signal has been input normally, and outputs the result.

In this state, when the train 2 enters the track circuit 2T, the train detection signal sent from the transmitting device 4 to the track circuit 2T is input to the superposition unit 6 due to the short-circuit of the rail 1 due to the axle of the train 2. The train detection signal is no longer output from the train detection filter 11 of the receiving device 8. Therefore, the signal determination unit 12 sets “0” indicating no train detection signal
The signal of the level is sent to the train detector 13. Train detector 13
When a signal of level "0" is sent, determines that the train 2 is on the track circuit 2T and outputs a train on-line signal. On the other hand, since the reference signal generated by the reference signal generator 7 is sent to the superimposer 6 irrespective of the short circuit of the rail 1 due to the axle of the train 2, the reference signal is output from the reference signal filter 14. As long as the signal is output, the failure determination unit 16
It is determined that the input unit 9 and the A / D converter 10 are operating normally.

In this manner, as long as the control signal is output from the control signal filter 14 regardless of the presence or absence of the train detection signal, the input unit 9 of the receiver 8 and the A / D converter 10 operate normally. It can be determined that the train detection signal has been input normally.

When a failure occurs in the input unit 9 or the A / D converter 10 of the receiving device 8 and the reference signal is not output from the reference signal filter 14, the signal determination unit 15 indicates that there is no reference signal, for example, The “0” level signal is output to
Send to When the signal of the “0” level is sent, the failure determination unit 16 determines that the receiving device 8 has not input the train detection signal properly, and outputs the result.

As described above, the input unit 9 and the A / D
When a failure occurs in the converter 10, even if the train 2 is not on the track circuit 2 </ b> T and a train detection signal is input to the superimposing device 6, the train detection filter 11 of the receiving device 8 detects the train. The train detection filter 11 does not output a train detection signal because the signal superimposed on the signal and the check signal is not sent, and the train detection unit 13 determines that the train 2 is on the track circuit 2T and outputs the train on-line signal. Output to ensure safety at all times.

Even if the input unit 9 of the receiving device 8 and the A / D converter 10 are normal, if the reference signal filter 14 fails, the reference signal is not output to the signal determination unit 15,
The failure determination unit 16 determines that the receiving device 8 has not input the train detection signal properly. At this time, the reference signal filter 1
Since the train detection signal filter 4 and the train detection signal filter 11 are processed by the program processing of one microcomputer, the train detection signal is not output from the train detection signal filter 11 either. It determines that the train 2 is on the train at 2T, outputs a train on-rail signal, and operates on the safe side.

Although the above embodiment has been described with reference to the case where the inspection signal generator 7 is provided for each track circuit, one inspection signal generator 7 may be used in a plurality of track circuits.

[0022]

As described above, according to the present invention, a signal for train detection and a signal for train detection, which are unrelated to the short circuit of the rail due to the axle of the train, are superimposed and input to the receiver, and the presence or absence of the signal for check is provided. Is used to determine whether or not the input terminal of the receiving device is operating normally, so that the presence or absence of a failure in the signal input terminal of the receiving device can be reliably detected with simple equipment. Furthermore, since the equipment has a simple configuration, the equipment can be reduced in size and cost.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 4 transmitting device 6 superimposing device 7 reference signal generator 8 receiving device 9 input unit 10 A / D converter 11 train detection signal filter 12 signal determination unit 13 train detection unit 14 reference signal filter 15 signal determination unit 16 failure determination unit

Claims (1)

[Claims] 1. A transmission device, a check signal generator, a superimposer, and a reception device, wherein the transmission device transmits a train detection signal for detecting the presence or absence of a train in each track circuit to one end of the track circuit,
The control signal generator generates a control signal in a frequency band different from the train detection signal, and the superimposer superimposes the control signal generated by the control signal generator on the train detection signal sent from the other end of the track circuit. Then, the superimposed signal is sent to the input terminal of the receiving device, and the receiving device inputs the superimposed signal by the superimposing device, separates the superimposed train detection signal and the inspection signal, and determines the presence or absence of the separated inspection signal. And detecting whether there is a failure in the input terminal.