JP2012076588A - Atc monitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ATC monitor that determines a failure of a track circuit in conformity with both an insulated track circuit and a non-insulated track circuit by relay control while minimizing a configuration of a monitor reception part.SOLUTION: The ATC monitor includes: a monitor unit for collecting an ATC signal and a TD signal (current/voltage) from an on-site device of an ATC system; a monitor reception part 12 for inputting and processing (demodulation/level calculation) an output signal of each monitor unit; and a monitor logical part 13 for aggregating processing results of the monitor reception part 12. The ATC monitor employs a scanning method using the relay control for specifying a failure of the track circuit and a fault device. The failure of the track circuit is detected in conformity with both the insulated track circuit and the non-insulated track circuit while minimizing the configuration of the monitor reception part 12.

Description

  The present invention relates to an ATC monitor that detects a failure of a railroad security system.

  An ATC (automatic train control device) system is a kind of railway security device system. The ATC system transmits a signal to the track circuit using a device that transmits and receives a signal of a specific frequency component installed for each track circuit. Then, the presence of the train is detected using the level of the train detection signal (TD signal) that changes depending on the presence or absence of the train vehicle on the track circuit, and the train control signal (ATC signal) is transmitted to the track circuit where the train has entered. This ensures the safety of railway operation.

  The ATC system is configured with a redundant system for ensuring the safety of train operation, and is designed to work on the safe side (in many cases, stopping the train) even if a device failure occurs. In addition, it is required to detect a failure of a device and identify a failure location so that it can be quickly recovered. Furthermore, preventive maintenance of equipment failure due to aging is required.

  A conventional ATC system failure detection apparatus includes an ATC monitor. The ATC monitor realizes the failure detection of the ATC system by the combinational logic of the signal level collected from the field device of the ATC system and the temporal state change of the track circuit.

  This will be specifically described. FIG. 4 shows a configuration diagram of the ATC system and the ATC monitor. 1 is a train, 2 is a track circuit (rail), 3 is a transmitter, 4 is a transmitting side equipment room protector, 5 is a transmitting side field protector, 6 is a receiving side field protector, and 7 is a receiving side equipment room protector. , 8 is a receiver, 9 is a train detection device, 10 is a logic unit, 11 is a LAN, 12 is a monitor reception unit, 13 is a monitor logic unit, and 14 is a terminal.

  First, in the ATC system for an insulated track circuit, as shown in FIG. 4, the logic unit 10 outputs a TD signal output instruction to the transmitter 3 through the LAN 11 and the train detection device 9. The transmitter 3 creates a TD signal based on the TD signal output instruction, modulates the signal, and outputs the TD signal to the transmission-side device room protector 4. Next, the TD signal is input to the receiver 8 through the transmitting side field protector 5, the corresponding section of the track circuit 2, the receiving side field protector 6, and the receiving side equipment room protector 7. Here, when the train 1 enters the track circuit 2 in the blockage section, the TD signal is short-circuited by the axle of the train 1, and as a result, the TD signal is transmitted via the receiving-side field protector 6 and the receiving-side equipment room protector 7. The input receiver 8 is disconnected. The receiver 8 calculates and demodulates the reception level of the signal output from the receiving-side device room protector 7 at regular time intervals, and outputs the calculation result to the train detection device 9. The train detection device 9 determines the train standing state of the blockage section by comparing the reception level calculated by the receiver 8 with the threshold value of the train detection device 9 itself.

  The ATC monitor collects signals in the transmission side equipment room protector 4, the transmission side field protector 5, the reception side field protector 6, and the reception side equipment room protector 7 among the devices constituting the ATC system, The monitor receiving unit 12 is configured to input this. The monitor receiver 12 receives the current · 1 and voltage V1 from the transmission side device room protector 4, the current I2 from the transmission side field protector 5, the current I3 from the reception side field protector 6, and the current from the reception side device room protector 7. Collect I4 and voltage V4. The ATC monitor demodulates signals from the field devices of these ATC systems and outputs the calculation results to the monitor logic unit 13. From the processing result of the monitor receiving unit 12, the monitor logic unit 13 determines whether the track circuit 2 is in the existing line state where the train is present or the non-existing line state where the train is not present. Next, the monitor logic unit 13 performs track circuit tracking for monitoring a time-series change in the track line 2 status. If the track status changes continuously, the track circuit 2 is tracked by the train 1, If the state changes discontinuously, it is determined that the track circuit has failed due to the failure of the field device.

  The ATC monitor collects currents I1, I2, I3, and I4 and voltages V1 and V4 as monitor signals from the field device. The monitor logic unit 13 identifies the failure section by comparing the level of the monitor signal measured at the normal time as the standard value with the level of the collected monitor signal. When both I1 and V1 are attenuated by a threshold value or more with respect to the standard value, the section 1 is determined as a failure. Next, when section 1 is normal and I2 is attenuated by a threshold value or more with respect to the standard value, section 2 is determined to be a failure. Next, when sections 1 and 2 are normal and I3 is attenuated by a threshold value or more with respect to the standard value, section 3 is determined to be a failure. Next, when sections 1 to 3 are normal and both I4 and V4 are attenuated by a threshold value or more with respect to the standard value, section 4 is determined to be a failure. Finally, when sections 1 to 4 are normal and one of I4 and V4 is attenuated by a threshold value or more with respect to the standard value, section 5 is determined to be a failure.

  With this system, it is possible to identify the failure of the field device and to quickly recover it, and to detect the failure of the device and identify the location of the failure.

  FIG. 5 is a configuration diagram of an ATC monitor in which FIG. Reference numeral 17 denotes a transceiver. 4 shows a configuration in which the four field devices of the ATC system and the monitor receiving unit 12 are connected. In FIG. 5, the transmitting side device room protector 4, the monitor receiving unit 12, and the transmitting side field protector are shown. 5 and the signal line of the monitor receiver 12 are shown as one signal line as a transmission side monitor signal. In addition, the signal lines of the receiving-side equipment room protector 6 and the monitor receiving unit 12, and the receiving-side field protector 7 and the monitor receiving unit 12 are also represented as one receiving-side monitor signal on one signal line. The monitor reception unit [1] receives the reception side monitor signal and the transmission side monitor signal of the track circuit 1T, and the monitor reception unit [2] receives the reception side monitor signal and the transmission side monitor signal of the track circuit 2T. is doing.

  In FIG. 5, one monitor receiving unit 12 is required for one track circuit in order to identify a faulty device. However, when a large number of closed sections of the track circuit 2 are targeted, a considerable number of monitor receivers 12 are required to determine a track circuit failure and identify a faulty device. When the failure determination is performed on the track circuit 2 having the blockage section of 100 to 200, the monitor receiving unit 12 of 100 to 200 is necessary, and there is a problem that the apparatus becomes large-scale.

  With regard to track circuit transceivers used in railway safety equipment (ATC equipment), when the output voltage / current of the power amplifier circuit is monitored by two CPUs and the output level of the power amplifier circuit falls outside the specified range By determining that the transmitter / receiver is faulty and stopping the output of the ATC signal and the TD signal, it is possible to detect an increased fault in the output of the transmitter without error and to obtain a highly safe fail-safe. It has been proposed (see Patent Document 1). Further, in the ATC monitor device, when a failure occurs in the track circuit, the transmission end current level change estimation unit measures the level change of the transmission end current, and the track circuit in which the failure has occurred is determined based on the train track information of the preceding and following track circuits. Estimate the train position of the train that has traveled, and match it with the measured level change of the transmission end current, and the display control unit shows the level change of the transmission end current when a failure occurs and the level change of the transmission end current when normal. It has been proposed that a display corresponding to the same train position is displayed, and an operator confirms this display and estimates a point where a failure has occurred (see Patent Document 2).

JP 2004-237903 A JP 09-249126 A

  Therefore, the problem to be solved is to provide an ATC monitor that minimizes the configuration of the monitor receiving unit in the ATC monitor that monitors the closed sections of a large number of track circuits.

  The ATC monitor according to the present invention adds a relay and a relay control unit to the configuration of the conventional ATC monitor, and the monitor logic unit controls the relay via the relay control unit, whereby the monitor receiving track targeted by the monitor receiving unit. Using a scanning method that enables switching between circuits, it is possible to determine whether or not a track circuit is faulty for both insulated and non-insulated track circuits while minimizing the configuration of the monitor receiver. The main feature is to do.

  However, unlike a conventional ATC monitor, an ATC monitor using a scanning method cannot always monitor all track circuits. In the worst case, there is a problem that a failure of the field device cannot be detected. In particular, since there is a signal that can be measured only when the train is present or only when the train is not present, it is necessary to switch the track circuit to be monitored in accordance with the train presence state.

  Therefore, as one of the means, relay control is performed to switch the track circuit to be monitored in accordance with the on-line state of the train. Thereby, the unbalanced current (50 Hz component of 3) is monitored in the track circuit of the train existing line, and the currents I1, I2, I3, I4 of the field device and the voltage V1 in the track circuit 2 of the train absent line. , V4 can be monitored.

  With the above relay control method, it is possible to control the relay to collect the voltage and current of the field device for the track circuit where the train is present or the track circuit where the train is not present. However, there may be a track circuit in which the train is not frequently used. With respect to such a track circuit, there is a problem that a failure of the field device cannot be detected by the above relay control method. Therefore, relay control is performed in which all track circuits are set as monitoring target track circuits regardless of the on-line status of the train, and are sequentially switched. Thereby, it becomes possible to monitor the track circuit 2 with a low frequency that the train is present.

  The combination of these two types of relay control makes it possible to implement ATC monitoring with high completeness even when scanning.

  The ATC monitor of the present invention has an advantage that the configuration of the monitor receiving unit can be minimized while the monitor logic unit controls the relay by the above-described means, while having the same function as the conventional ATC monitor.

It is a block diagram which shows one Example applied with respect to the insulated track circuit of the ATC monitor by this invention. It is a block diagram of another Example applied with respect to the insulated track circuit of the ATC monitor by this invention. It is a block diagram which shows the Example applied with respect to the non-insulated track circuit of the ATC monitor by this invention. It is a functional block diagram of a conventional ATC monitor. It is a block diagram of the conventional ATC monitor.

  Hereinafter, an embodiment of the ATC monitor according to the present invention will be described with reference to FIGS.

  The embodiment shown in FIG. 1 shows a configuration of an ATC monitor in which a relay 15 and a relay control unit 16 are added to the configuration of the conventional ATC monitor shown in FIG. The monitor logic unit 13 outputs a relay control instruction to the relay control unit 16. Since the number of relays 15 that operate according to the relay control instruction is limited, only one monitor receiving unit 12 is required, and the configuration thereof can be minimized. As for relay control, there are two methods of matching the on-line state of the train 1 or sequentially switching all track circuits regardless of the on-line state of the train 1. In addition, determination of a train presence line is performed based on the information of the train detection apparatus 9 to connect.

  First, the relay control for switching the track circuit to be monitored according to the on-line state of the train 1 will be described. The monitor logic unit 13 detects the train line detection based on the train line information received from the logic unit 10 or the train detection device 9 via the LAN 11. As a result, the monitor logic unit 13 can recognize the track circuit 2 where the train 1 is located, and closes the relay 15 connected to the track circuit 2 in order to make the track circuit 2 a monitored track circuit. The relay controller 16 is instructed to open the other relays 15. For example, when the train 1 is present in the track circuit 1T, the monitor logic unit 13 collects the transmission-side monitor signal and the reception-side monitor signal of the track circuit 1T, so that the relay [1] ] And relay [2] are closed, and instructions are given to open other relays. The relay control unit 16 controls the relays [1] and [2] according to this instruction, and the monitor signal of the track circuit 1T on which the train 1 is located is sent to the monitor receiving unit 12 via the relay [1] and the relay [2]. Entered.

  Next, relay control for sequentially switching all track circuits 2 regardless of the on-line state of the train 1 will be described. The monitor logic unit 13 adds an identification number to all track circuits 2 that are to be monitored by the monitor logic unit 13. As a result, the monitor logic unit 13 can switch the track circuits 1T, 2T,... In the order of the identification numbers, and is connected to the track circuit in order to make the track circuit a monitor target track circuit. An instruction is output to the relay control unit 16 so that the relay 15 is closed and the other relays are opened. As described above, the ATC monitor that has the function of the conventional ATC monitor and minimizes the configuration of the monitor receiving unit 12 has been described.

  1 has a relay 15 connected to each track circuit 1T, 2T,..., And for each transmission-side monitor signal and reception-side monitor signal, and signals between the relay 15 and the relay controller 16 to the relay. It has a configuration with a large amount of wire.

  As shown in FIG. 1, the transmission direction of the TD signal of the insulated track circuit compatible ATC system is the same in any track circuit 2, and is opposite to the traveling direction of the train 1. When monitoring the track circuit 1T, the monitor logic unit 13 controls the relay control unit 16 so that the relay [1] and the relay [2] are connected to the track circuit 2 with respect to the monitor receiving unit 12. The relay [1] collects the reception side monitor signals I3, I4, and V4 of the track circuit 1T, and the relay [2] collects the transmission side monitor signals I1, V1, and I2 of the track circuit 1T. Similarly, when monitoring the track circuit 2T, the relay [3] and the relay [4] are controlled, and when monitoring the track circuit 3T, the relay [5] and the relay [6] are controlled. Thus, in the ATC monitor in the insulated track circuit, the combination of the target track circuit and the relay is one-to-one, and the number of relays to be controlled when monitoring one track circuit 2 is one.

  In order to reduce the amount of signal lines between the relay 15 and the relay control unit 16 to the relay 15, as shown in FIG. 2, the relays connecting the monitor signals of the same track circuit 1 T, 2 T,. Reduce the number and quantity of signal wires between the relay controller and the relay. For example, the track circuit 1T is connected to one relay [1] on the transmission side and the reception side.

  As shown in FIG. 3, the direction of the TD signal of the non-insulated track circuit compatible ATC system varies depending on the track circuit 2, and there is a track circuit 2 in the reverse direction of the traveling direction of the train 1 and the forward track circuit 2. For example, for track circuits 1T and 2T, the boundaries are not insulated from each other, and one transmitter [1] is connected to receivers [1] and [2] arranged on the adjacent boundary, The directions of the TD signals are opposite to each other. When monitoring the track circuit 1T, the monitor logic unit 13 controls the relay control unit 16 so that the relay [1] and the relay [2] are connected to the track circuit. The relay [1] takes in the transmission side monitor signals I1,..., I2 of the track circuit 1T, and the relay [2] takes in the reception side monitor signals I3, I4, V4 of the track circuit 1T. When the track circuit 2T is monitored, the relay [2] and the relay [3] are controlled, and the relay [2] at this time is configured to take in the transmission side monitor signals · 1, V1, and I2 of the track circuit 2T. As described above, the ATC monitor in the non-insulated track circuit may capture monitor signals of different track circuits even with the same relay 15.

  From the above, the ATC monitor of the non-insulated track circuit differs in the relay control method because the directions of the ATC signal and TD signal or TD signal flowing on the track circuit are different. In this problem, the monitor receiving unit 12 is configured to be able to individually control the relay that takes in the transmission side monitor signal and the relay that takes in the reception side monitor signal. As a result, the ATC monitor has a device configuration that can handle both the insulated track circuit and the non-insulated track circuit.

1 train 2 track circuit (rail)
DESCRIPTION OF SYMBOLS 3 Transmitter 4 Transmission side equipment room protector 5 Transmission side field protector 6 Reception side field protector 7 Reception side equipment room protector 8 Receiver 9 Train detection apparatus 10 Logic part 11 LAN 12 Monitor receiving part 13 Monitor logic part 14 Terminal 15 Relay 16 Relay control unit 17 Transceiver

Claims (7)

Using the transmission / reception equipment installed for each track circuit, the level of the train detection signal transmitted to the track circuit changes depending on the presence or absence of a train on the track circuit, and detects the status of the train on the track, A monitor receiving unit that is used in an ATC system that transmits a train control signal to the track circuit in which the train has entered, and that inputs and processes the train control signal and the train detection signal collected from a field device, and the monitor receiving unit In the ATC monitor that detects the failure of the ATC system, the monitor logic unit collects the processing results of
An ATC monitor characterized in that a relay is added to a preceding stage on the connection side of the monitor receiving unit with the transmitting / receiving device, and the track circuit to be monitored can be switched by a scanning method by switching the relay. The ATC monitor according to claim 1,
An ATC monitor comprising a relay control unit that receives the relay control from the monitor logic unit and switches the track circuit to be monitored in accordance with the on-line state of the train. The ATC monitor according to claim 1,
The ATC is provided with a relay control unit that receives the relay control from the monitor logic unit and sets all the track circuits as the track circuit to be monitored and sequentially switches without depending on the on-line state of the train. monitor. In the ATC monitor according to any one of claims 1 to 3,
An ATC monitor characterized by being capable of supporting both an insulated track circuit and a non-insulated track circuit by adopting a relay configuration capable of individually scanning the transmitting side and the receiving side of any track circuit. The ATC monitor according to claim 4,
In correspondence with the insulated track circuit, the relay is provided corresponding to each of a transmitting device and a receiving device installed for each track circuit. The ATC monitor according to claim 4,
In correspondence with the insulated track circuit, the relay is provided corresponding to the transmission / reception device installed for each track circuit. The ATC monitor according to claim 4,
In correspondence with the non-insulated track circuit, the relay is provided corresponding to a transmitting device or a receiving device installed for each adjacent track circuit.

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