JP5225430B2 - Automatic train control device - Google Patents

Description

  The present invention erroneously employs an automatic train control apparatus using a coded ATC signal or an ATS signal with several different carrier frequencies, particularly a control signal transmitted to an adjacent track circuit due to leakage or guidance in the track circuit. It is about preventing this.

  For example, Patent Document 1 discloses an automatic train control device that transfers information between the ground and a train using a track circuit to automatically control the speed of a train below a speed limit. As shown in FIG. 5, the automatic train control device disclosed in Patent Document 1 connects transmitters 3a to 3e to the boundaries of track circuits 1T, 2T, 3T, 4T, and 5T, and the transmitters 3a to 3e. To the track circuits 1T to 5T, the control signals of the signal waves having different carrier frequencies f1 and f2 are transmitted, and the onboard device mounted on the train 1 controls the speed of the train based on the received control signals of the signal waves. Yes. Each of the track circuits 1T to 5T controls the signal current so that the guidance from the adjacent track circuit, the vertical line guidance, the wraparound or the like is within the allowable range, and is transmitted to the adjacent track circuit in the system. Is prevented from being mistakenly adopted.

  On the other hand, for example, in a single rail track circuit that uses rail insulation only on one rail, there is a lot of stray flow due to guidance or wraparound from adjacent track circuits, and only the control signal transmitted to the single rail track circuit is transmitted by the on-board device. It is difficult to receive. This single rail track circuit has an unbalanced electrical circuit. Therefore, in order to keep the guidance from the adjacent track circuit, vertical line guidance, wraparound, etc. below the allowable range, the balance and level setting of the track circuit, prevention of wraparound part Such a track circuit adjustment requires a great deal of cost. In addition, a large amount of cost is required to convert a single rail track circuit into a double rail using rail insulation on both rails.

  The present invention solves such a problem, and the control signal transmitted to the single rail track circuit can be correctly selected by the on-board device without transmitting the single rail track circuit to the double track, and is transmitted to the adjacent track circuit. It is an object of the present invention to provide an automatic train control device that can prevent erroneous use of a control signal.

  The automatic train control device of the present invention includes a transmitter connected to each track circuit including a single rail track circuit, and an on-board device mounted on the train, and the transmitter stores track circuit identification information. Including a control signal including a different carrier frequency for each track circuit and transmitting it from the boundary of the train advancing side of each track circuit, the on-board device includes a receiver and a control device, and the receiver includes a receiver and A demodulation unit and a reception threshold value switching unit, wherein the reception unit receives a control signal of a different carrier frequency transmitted for each track circuit, outputs the received control signal to the demodulation unit, and the demodulation unit inputs A control signal equal to or higher than a threshold value indicating the minimum reception sensitivity of the reception level of the control signal set in the reception threshold value switching unit of the control signal is demodulated and output to the control device. It has a circuit type determination unit and the front The data storage unit stores in advance track circuit type information associated with each track circuit identification information, and the track circuit type determination unit recognizes track circuit identification information included in all control signals output from the demodulation unit. The track circuit type information stored in the data storage unit is confirmed by the recognized track circuit identification information, and it is determined whether or not the track circuit of the track circuit identification information includes a single rail track circuit. When a single rail track circuit is included in the track circuit of the circuit identification information, the track circuit information indicating the single rail track circuit is output to the reception threshold value switching unit of the receiver, and the reception threshold value switching unit of the receiver is When track circuit information indicating a single rail track circuit is input from the track circuit type determination unit, the threshold value indicating the minimum reception sensitivity of the reception level of the control signal is increased.

  The transmitter that transmits the control signal to the single rail track circuit has a higher signal level than the other transmitters, and the reception threshold value switching unit of the receiver has a reception level of the control signal output from the receiver. The first threshold value indicating the minimum reception sensitivity of the first rail, and the signal level of the control signal of the carrier frequency that is higher than the first threshold value indicating the minimum reception sensitivity and that wraps around the single rail track circuit. When the second threshold value indicating the minimum reception sensitivity corresponding to the signal level of the control signal to be transmitted is set and the track circuit information indicating the single rail track circuit is input from the track circuit type determination unit, the control signal reception level The minimum reception sensitivity is switched from the first threshold value to the second threshold value.

  The track circuit type determination unit of the control device outputs track circuit information indicating a single rail track circuit to the reception threshold value switching unit of the receiver and subsequently identifies track circuit of a control signal input from the demodulation unit. The track circuit type information stored in the data storage unit is confirmed by information, and if it is confirmed that the control signal input from the demodulator is only the control signal transmitted to the single rail track circuit, it is input from the demodulator. The control signal is output as track circuit information necessary for train control. When the track circuit of the recognized track circuit identification information does not include a single rail track circuit, the control signal input from the demodulator is train controlled. Is output as track circuit information necessary for the operation.

  In the present invention, a control signal including track circuit identification information is generated at a different carrier frequency for each track circuit, and the control signal transmitted to each track circuit is received and demodulated by the on-board device, and all received controls When recognizing the track circuit identification information included in the signal, confirming the track circuit type information stored in the data storage unit by the recognized track circuit identification information, and when the single track circuit is included in the track circuit identification information, By increasing the threshold value indicating the minimum reception sensitivity of the reception level of the control signal to be demodulated, the line is stopped in the single rail track circuit, the train power is turned off, and the power is turned on when the track circuit information is unknown In this case, it is possible to reliably select the control signal transmitted to the single rail track circuit.

It is a block diagram which shows the structure of the automatic train control apparatus of this invention. It is a block diagram which shows the structure of a vehicle-mounted apparatus. It is a schematic diagram which shows the threshold value of the reception level of the received signal received with an on-vehicle apparatus, and the minimum receiving sensitivity. It is a flowchart which shows a process when track circuit information is received by the train which exists in a single track circuit and is in the state where track circuit information is unknown. It is a block diagram which shows the structure of the conventional automatic train control apparatus.

  FIG. 1 is a block diagram showing the configuration of the automatic train control device of the present invention in a station premises. As shown in the figure, the automatic train control device includes an on-board device 2 mounted on a train 1 and trains of each track circuit 1T, 2T, 3T, 4T, and 5T in a station premises having a main line A and a shunt line B, for example. It has the transmitters 3a-3e provided in the advance side. The transmitters 3a to 3e transmit control signals of signal waves having different carrier frequencies f1, f2, f3, f4, and f5 to the track circuits 1T to 5T.

  The boundary between the track circuit 1T having a branching device on the advancing side of the train 1 and the track circuit 2T of the evacuation line B and the boundary between the track circuit 1T and the track circuit 3T of the main line A are single rail tracks using rail insulation only on one rail. It consists of a circuit. For this reason, the control signal of the carrier frequency f3 is transmitted from the transmitter 3c to the track circuit 3T of the main line A, and the control signal of the carrier frequency f1 transmitted from the transmitter 3a to the track circuit 1T and the save line B from the transmitter 3b. The control signal of the carrier frequency f2 transmitted to the track circuit 2T wraps around. Further, the control signal of the carrier frequency f2 is transmitted from the transmitter 3b to the track circuit 2T of the save line B, and the control signal of the carrier frequency f1 transmitted from the transmitter 3a to the track circuit 1T and the main line A from the transmitter 3c. A control signal of the carrier frequency f3 transmitted to the track circuit 3T wraps around. The transmitter 3c connected to the track circuit 3T configured by this single rail track circuit and the transmitter 3b connected to the track circuit 2T set the signal level to be transmitted from the wraparound level from the other transmitters 3a, 3d, 3e. The signal level of the control signal of the carrier frequency f3 that is set high and transmitted from the transmitter 3c to the track circuit 3T of the single rail track circuit is the signal level of the control signal of the carrier frequency f1 and the control signal of the carrier frequency f2 that goes around the track circuit 3T. The signal level of the control signal of the carrier frequency f2 transmitted from the transmitter 3b to the track circuit 2T of the single rail track circuit is higher than that of the control signal of the carrier frequency f1 and the control signal of the carrier frequency f3. Get higher.

  The on-vehicle device 2 includes a receiver 4 and a control device 5 as shown in the block diagram of FIG. The receiver 4 includes a reception unit 6, a demodulation unit 7, and a reception threshold value switching unit 8. The receiving unit 6 includes f1 receiving units 6a to f5 receiving unit 6e that receive the control signals of the carrier frequency f1 to the carrier frequency f5 transmitted to the track circuits 0T to 5T through the power receiver 9. The demodulator 7 demodulates the control signal received by the f1 receivers 6a to 6e. As shown in FIG. 3, the reception threshold value switching unit 8 includes a first threshold value RL1 indicating the minimum reception sensitivity of the reception level of the control signal output in advance from the f1 reception units 6a to 6e, and the minimum reception sensitivity. Is higher than the first threshold value RL1 indicating the signal level of the control signal of the carrier frequencies f1 and f2 that wrap around the track circuit 3T of the single rail track circuit and the carrier frequencies f1 and f3 wrap around the track circuit 2T of the single rail track circuit The second threshold value RL2 is set which is higher than the signal level of the control signal and indicates the minimum reception sensitivity corresponding to the signal level of the control signal transmitted to the track circuits 3T and 2T of the single rail track circuit. The reception threshold value switching unit 8 is set with the first threshold value RL1 indicating the minimum reception sensitivity as a reference threshold value for a control signal demodulated by the demodulation unit 7, and includes a single rail track circuit as rail type information output from the control device 5. Is indicated, the minimum reception sensitivity of the control signal demodulated by the demodulator 7 is switched to the second threshold RL2.

  The control device 5 includes a data storage unit 10, a track circuit type determination unit 11, and a control unit 12. The data storage unit 10 stores track circuit type information in association with each track circuit ID in advance and stores various control data. For example, a single rail track circuit is specified as track circuit type information for each track circuit ID specifying the track circuit 2T and track circuit 3T, and track circuit type information is specified for each track circuit ID specifying the track circuit 4T or track circuit 5T. A multi-rail circuit is designated as The track circuit type determination unit 11 recognizes track circuit IDs included in all control signals output from the demodulation unit 7 of the receiver 4, and stores track circuit type information stored in the data storage unit 10 based on the recognized track circuit IDs. Check and determine whether the track circuit of the recognized track circuit ID includes a single track circuit, and if the track circuit of the recognized track circuit ID includes a single track circuit, the single track circuit As a result of confirming the track circuit type information stored in the data storage unit 10 by the track circuit ID of the control signal input from the demodulator 7, When it is confirmed that the control signal input from the demodulator 7 is only the control signal transmitted to the single rail track circuit, the control signal input from the demodulator 7 is output to the controller 12. When the track circuit of the recognized track circuit ID does not include a single rail track circuit, the control signal input from the demodulator 7 is output to the controller 12. The control unit 12 holds the input control signal as track circuit information necessary for train control.

  With this train control device, for example, the station 1 is on the track circuit 3T, which is a single rail track circuit of the main line A in the station, and is stopped. The power of the train 1 that is turned off is turned on and transmitted to the track circuit 3T. The operation when the control signal is specified and received will be described with reference to the flowchart of FIG.

  Since the receiver 4 of the on-board device 2 of the train 1 that is on the track circuit 3T, which is a single rail track circuit, stops and is turned off, the power is turned off, so that it is transmitted to the track circuit 3T. The control unit 12 of the control device 5 is in a state in which the track circuit information is unknown.

  When the power is turned on in the train 1 in a state where the track circuit information is unknown (step S1), the receiver 4 of the on-board device 2 is connected to all the track circuits 3T. Receive a signal. A control signal of the carrier frequency f3 is transmitted from the transmitter 3c to the single-track track circuit 3T where the train 1 is located, and a control signal and a transmitter of the carrier frequency f1 transmitted from the transmitter 3a to the track circuit 1T. A control signal or the like of the carrier frequency f2 to be transmitted from 3b to the track circuit 2T on the save line B flows or a guided signal flows. Therefore, the control signal of the carrier frequency f3 transmitted from the transmitter 3c connected to the track circuit 3T to the track circuit 3T is received by the f3 receiver 6c of the receiver 6, and transmitted from the transmitter 3a to the track circuit 1T. The control signal of the carrier frequency f1 that wraps around the track circuit 3T is received by the f1 receiver 6a, and the control signal of the carrier frequency f2 that is sent from the transmitter 3b to the track circuit 2T and wraps around the track circuit 3T is f2. The signal is received by the receiving unit 6 b and output to the demodulating unit 7. The demodulating unit 7 uses the first threshold value RL1 indicating the minimum receiving sensitivity set in the receiving threshold value switching unit 8, and the carrier frequency f1 to the carrier frequency f3 input from the f1 transmitting unit 6a, the f2 transmitting unit 6b, and the f3 transmitting unit 6c. The control signal is demodulated and output to the track circuit type determination unit 11 (step S2). The sneak signal of the carrier frequencies f1 and f2 other than the control signal of the carrier frequency f3 transmitted from the transmitter 3c to the track circuit 3T may be equal to or more than the first threshold value RL1 indicating the minimum reception sensitivity depending on the case. In such a case, the demodulator 7 demodulates and outputs all signals equal to or higher than the first threshold value RL1 indicating the minimum reception sensitivity such as a control signal flowing through the track circuit 3T.

  The track circuit type determination unit 11 recognizes the track circuit ID from all the control signals input from the demodulator 7 (step S3), and confirms the track circuit type information stored in the data storage unit 10 by all the recognized track circuit IDs. (Step S4), it is determined whether or not the information indicating the single rail track circuit is included in the track circuit type information of all recognized track circuit IDs. As a result of the determination, all the track circuit IDs recognized are determined. When the track circuit type information includes information indicating at least one single rail track circuit, the track circuit type information indicating the single track circuit is output to the reception threshold value switching unit 8 (step S5). That is, when the train 1 is present on the track circuit 3T that is a single rail track circuit, the control signal input from the demodulator 7 to the track circuit type determination unit 11 is transmitted to the track circuit 3T from the transmitter 3c. Since the control signal f3 is included, the track circuit type information indicating the single rail track circuit is output from the track circuit type determination unit 11 to the reception threshold value switching unit 8.

  When the reception threshold switching unit 8 receives the track circuit type information indicating the single rail track circuit, the minimum reception sensitivity of the control signal demodulated by the demodulation unit 7 is switched from the first threshold RL1 to the second threshold RL2 (step S6). Then, a control signal equal to or higher than the second threshold value RL2 indicating the minimum reception sensitivity switched among the control signals output from the receiving unit 6 is input, demodulated and output (step S7). At this time, the signal level of the carrier frequency f3 transmitted from the transmitter 3c to the track circuit 3T is higher than the signal level of the control signal of the carrier frequency f1 and the control signal of the carrier frequency f2 that wraps around the track circuit 3T, and the minimum reception sensitivity is obtained. The demodulating unit 7 demodulates only the control signal of the carrier frequency f3 input from the f3 transmitting unit 6c and outputs it to the track circuit type determining unit 11 because it is equal to or greater than the second threshold RL2 shown.

  When the track circuit type determination unit 11 receives the control signal of the carrier frequency f3, it recognizes the track circuit ID included in the input control signal, and the control signal input by the recognized track circuit ID is transmitted to the single rail track circuit. When it is confirmed that only the control signal is present, the input control signal is output to the control unit 12. The control unit 12 holds the input control signal as track circuit information necessary for train control (step S8).

  On the other hand, the reception threshold value switching unit 8 switches the minimum reception sensitivity of the control signal demodulated by the demodulation unit 7 from the first threshold value RL1 to the second threshold value RL2, and after a predetermined time T has elapsed, the demodulation unit The minimum reception sensitivity of the control signal demodulated in step 7 is returned to the first threshold value RL1, and the control signal transmitted to the track circuit 1T can be received when the train 1 advances from the track circuit 3T and enters the track circuit 1T. (Steps S9 and S10).

  In this way, when the track 1T is turned on in a state where the track circuit information is unknown by stopping the power supply to the track circuit 3T, which is a single track circuit, A control signal transmitted to a certain track circuit 3T can be reliably selected.

  In the above description, the case where the track circuit type information is stored in advance in association with each track circuit ID in the data storage unit 10 has been described. However, the control signal transmitted from the transmitters 3a to 3e to the track circuits 1T to 5T together with the track circuit ID. Track circuit type information may be added.

1; train, 2; on-board device, 3; transmitter, 4; receiver, 5; control device, 6;
7; demodulator, 8; reception threshold switching unit, 9; power receiver, 10; data storage unit,
11: Track circuit type determination unit, 12: control unit.

Japanese Patent Laid-Open No. 2005-22558

Claims (3)

A transmitter connected to each track circuit including a single rail track circuit, and an on-board device mounted on the train,
The transmitter generates a control signal including track circuit identification information with different carrier frequencies f1 to fn for each track circuit, and transmits it from the boundary on the train advance side of each track circuit,
The on-board device has a receiver and a control device, the receiver has a receiving unit, a demodulating unit, and a receiving threshold value switching unit, and the receiving unit transmits different carrier frequencies f1 to f1 transmitted for each track circuit. The control signal of fn is received, the received control signal is output to the demodulator, and the demodulator is a threshold value indicating the minimum reception sensitivity of the reception level of the control signal set in the reception threshold switching unit of the input control signal The above control signal is demodulated and output to the control device,
The control device includes a data storage unit and a track circuit type determination unit. The data storage unit stores track circuit type information in association with each track circuit identification information in advance, and the track circuit type determination unit stores the demodulation circuit. The track circuit identification information included in all control signals output from the unit is recognized, the track circuit type information stored in the data storage unit is confirmed by the recognized track circuit identification information, and the track of the recognized track circuit identification information is confirmed. It is determined whether or not a single rail track circuit is included in the circuit, and when the track circuit of the recognized track circuit identification information includes a single rail track circuit, the track circuit information indicating the single rail track circuit is received by the receiver. Output to the reception threshold value switching unit of
The reception threshold value switching unit of the receiver increases the threshold value indicating the minimum reception sensitivity of the reception level of the control signal when the track circuit information indicating the single rail track circuit is input from the track circuit type determination unit. Train control device. A transmitter that transmits a control signal to the single rail track circuit has a higher signal level than other transmitters,
The reception threshold switching unit of the receiver has a first threshold value indicating the minimum reception sensitivity of the reception level of the control signal output from the reception unit, and a level higher than the first threshold value indicating the minimum reception sensitivity, And a second threshold value that is higher than the signal level of the control signal of the carrier frequency that goes around the single rail track circuit and indicates the minimum reception sensitivity corresponding to the signal level of the control signal transmitted to the single rail track circuit is set. The train control according to claim 1, wherein when the track circuit information indicating the single rail track circuit is input from the determination unit, the minimum reception sensitivity of the reception level of the control signal is switched from the first threshold value to the second threshold value. apparatus.   The track circuit type determination unit of the control device outputs track circuit information indicating a single rail track circuit to the reception threshold value switching unit of the receiver and subsequently uses track circuit identification information of a control signal input from the demodulation unit. Confirming the track circuit type information stored in the data storage unit, and confirming that the control signal input from the demodulator is only the control signal transmitted to the single rail track circuit, the control signal input from the demodulator Is output as track circuit information necessary for train control, and when the track circuit of the recognized track circuit identification information does not include a single rail track circuit, the control signal input from the demodulator is required for train control. The train control device according to claim 1 or 2, wherein the train control device outputs the information as correct track circuit information.

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