JP5683203B2 - Automatic train control device - Google Patents

Description

  The present invention relates to an automatic train control apparatus that stably detects a boundary of a track circuit using a rail as an information transmission path on a vehicle and accurately detects a traveling position of a train.

  The automatic train control device that exchanges information between the ground and the train to automatically control the train speed below the speed limit is a stop target determined in advance by the distance from the preceding train and the conditions of the route such as curves and branches. A method of transmitting an ATC signal indicating a position and a current track position to a track circuit, and the on-board device continuously decelerates the train based on a verification speed pattern to a stop target position calculated from the ATC signal received from the track circuit It is.

  In order to appropriately control the speed of this train, it is necessary to accurately recognize the traveling position of the own train with an on-board device mounted on the train. In order to recognize the position of this train by the on-board device, for example, the digital automatic train control device shown in Patent Document 1 performs a mileage calculation by a signal from the speed generator on the on-board device mounted on the train, Absolute position information is acquired from a position correcting transponder ground element provided at a predetermined position on the ground, position correction is performed, and the position of the train is detected by the on-board device.

  In order to acquire the absolute position information from the transponder ground element and perform the position correction, it is necessary to provide many transponder ground elements on the ground, which requires a lot of cost for installation and maintenance. In order to improve this problem, the train position detection method disclosed in Patent Document 2 holds the absolute position information of each track circuit in the on-board device and receives the train detection signal transmitted from the track circuit boundary to the track circuit. When the train's axle passes through the track circuit boundary, it detects that the reception level of the train detection signal received immediately after it has dropped sharply and determines that the train has passed the track circuit boundary. The travel distance calculated based on the signal from the speed generator is corrected by the absolute position information of each track circuit.

  However, the reception level of the train detection signal transmitted to the track circuit and received by the on-board device is not limited to passing through the track circuit boundary. For example, the ground device is switched from system 1 to system 2 due to a failure. In this case, the reception level of the signal received at the switching moment becomes “0”. In addition, even when there is an object that interferes with electromagnetic induction, such as an iron plate, in the vicinity of the track, the reception level of the train detection signal received is drastically lowered when the train passes through the vicinity. For this reason, the track circuit boundary may not be detected accurately.

  An object of the present invention is to provide an automatic train control device that improves such disadvantages, stably detects a track circuit boundary on a vehicle, and can accurately detect a traveling position of a train. It is.

Automatic train control device according to the present invention has an on-board device mounted on the ground equipment and the train, the ground device is connected near the boundary of the train advancing side of each track circuit, identifying the connected track circuit It has a track circuit number that has a transmitter for transmitting ATC signals of different carrier frequencies for each track circuit, the on-board device, receiving content detection unit and the receiving unit and the reception level detecting unit and a track circuit boundary determination has a section, the receiving section receives the ATC signal via the power receiving device is transmitted to each track circuit, the reception level detection unit monitors a change in the received ATC signal, the reception level is previously to determine as to whether or not becomes lower than the set threshold output to the track circuit boundary determination unit, the received content detection unit detects the carrier frequency included in the ATC signal received, the carrier frequency of the ATC signal The gauge Output circuit boundary determination unit, the track circuit boundary determination unit, when the receiver is in the carrier frequency of the ATC signal from the received content detecting section, lower than the reception level threshold of the ATC signal from the reception level detecting unit If a signal indicating that the reception level of the ATC signal is higher than a threshold is input from the reception level detection unit, the point at that time is determined as a temporary track circuit boundary. The carrier frequency of the ATC signal input from the reception content detection unit is confirmed, and when the carrier frequency of the ATC signal whose reception level is higher than the threshold is the same as the carrier frequency of the ATC signal at the temporary track circuit boundary , it is determined. discard track circuit boundary provisional carrier frequency higher than the reception level threshold ATC signal of the ATC signal in the track circuit boundary provisional carrier If different from the wave number, and judging the track circuit boundary provisional it is determined that the true track circuit boundaries.

  The on-board device includes a track circuit boundary storage unit and a standing line position detection unit, and the track circuit boundary storage unit stores track circuit boundaries of each track circuit in advance, and the track position detection unit includes a speed generator. When the travel position of the train is detected by calculating the travel distance of the train by integrating the speed pulse output from the vehicle, and the signal indicating the track circuit boundary is input from the track circuit boundary determination unit, the travel position of the detected train is The track circuit boundary is stored in the track circuit boundary storage unit and corrected to the position of the track circuit boundary of each track circuit.

  In the present invention, when the reception level of the ATC signal received by the on-board device falls below the threshold value, the point at that time is determined as a temporary track circuit boundary, and then the reception level of the ATC signal becomes higher than the threshold value. The carrier frequency that is the content of the ATC signal and the track circuit number included in the ATC signal are confirmed, and if the content of the ATC signal before and after the reception level is lowered is the same, the determined temporary track circuit boundary is When the contents of the ATC signals before and after the discarding and the reception level lowering are different, the determined temporary track circuit boundary is determined as a true track circuit boundary, for example, an iron plate existing near the track Even if the reception level of the received ATC signal decreases due to the influence of an object that interferes with the electromagnetic induction action, etc., the position where the reception level has decreased is prevented from being mistaken as a track circuit boundary. Bets can be, a train running position of accurately detecting a track circuit boundary onboard system can be detected stably.

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 change characteristic figure of the reception level and carrier wave frequency of an ATC signal when using an insulated track circuit. It is a block diagram which shows the structure of another on-vehicle apparatus. It is a change characteristic figure of the reception level of ATC signal when using an non-insulated track circuit, and a carrier wave frequency.

  FIG. 1 is a block diagram showing the configuration of the automatic train control device of the present invention. As shown in the figure, the automatic train control device has an on-board device 3 mounted on a ground device 1 and a train 2.

  The ground device 1 includes transmitters 4a to 4c connected to boundaries on the train advance side of the track circuits 1T to 3T, and receivers 5a to 5d connected to boundaries on the train approach side of the track circuits 1T to 4T. And a condition communication circuit 6 that sends change information that changes depending on the position of the preceding train, opening of the route, and the like to the transmitters 4a to 4c. The transmitters 4a to 4c transmit train detection signals to the connected track circuits 1T to 3T, and the receivers 5a to 5d are track circuits depending on whether or not the train detection signals transmitted to the connected track circuits 1T to 4T are received. It is determined whether the train 2 is present at 1T to 4T. Further, the transmitters 4a to 4c are based on the track circuit numbers that identify the track circuits 1T to 4T connected to the change information that is changed by the position of the preceding train and the route opening that are sent from the condition communication circuit 6 or the like. Train control signals (ATC signals) having different carrier frequencies f1 to f3 are generated every 3T and transmitted to the track circuits 1T to 3T.

  As illustrated in the block diagram of FIG. 2, the on-board device 3 includes a track circuit boundary storage unit 30, a reception unit 31, a reception level detection unit 32, a reception content detection unit 33, a track circuit boundary determination unit 34, and a standing line position detection unit. 35, a demodulator 36, an arithmetic processor 37, a speed check unit 38, and a speed controller 39.

  The track circuit boundary storage unit 30 stores track circuit boundaries of the track circuits 1T to 4T in advance. The receiver 31 receives the ATC signal transmitted to the track circuits 1T to 4T via the power receiver 10. The reception level detection unit 32 monitors changes in the ATC signal received by the reception unit 31, determines whether the reception level is lower than a preset threshold value STh, and outputs it to the track circuit boundary determination unit 34. The reception content detection unit 33 detects the content of the ATC signal received by the reception unit 31. For example, the reception content detection unit 33 detects the carrier frequency f1 to f3 of the ATC signal and outputs a signal indicating the carrier frequency to the track circuit boundary determination unit 34. To do.

  The track circuit boundary determination unit 34 receives a signal indicating the carrier frequency of the ATC signal from the reception content detection unit 33, and indicates that the reception level of the ATC signal has decreased from the threshold value STh from the reception level detection unit 32. Is input, the point at that time is determined as a temporary track circuit boundary. Thereafter, when a signal indicating that the reception level of the ATC signal has become higher than the threshold value STh is input from the reception level detection unit 32, a signal indicating the carrier frequency input from the reception content detection unit 33 is confirmed, and the reception level of the ATC signal is confirmed. If a signal having the same carrier frequency as that before the signal falls is input, the determined temporary track circuit boundary is discarded. When a signal indicating that the reception level of the ATC signal is higher than the threshold value STh is input from the reception level detection unit 32 and a signal indicating the carrier frequency input from the reception content detection unit 33 is confirmed, the reception of the ATC signal is performed. If a signal having a carrier frequency different from the carrier frequency before the level is lowered is input, the determined temporary track circuit boundary is determined as a true track circuit boundary and is output to the standing line position detection unit 35.

  The track position detection unit 35 integrates the speed pulse output from the speed generator 11 to calculate the travel distance of the train 2, detects the travel position, and outputs it to the arithmetic processing unit 37. When the signal indicating the track circuit boundary is input from the unit 34, the detected travel position of the train 2 is corrected to the track circuit boundary position of each track circuit 1T to 4T stored in the track circuit boundary storage unit 30. The result is output to the arithmetic processing unit 37.

  The demodulator 36 demodulates the ATC signal received by the receiver 31 and outputs it to the arithmetic processor 37. The arithmetic processing unit 37 creates a speed pattern of the train 2 with reference to the change information included in the demodulated ATC signal and the traveling position of the train 2, and outputs it to the speed checking unit 38. The speed checking unit 38 compares the speed indicated by the input speed pattern with the speed of the train 2, checks the speed, and outputs it to the speed control unit 39. The speed control unit 39 controls the brake device and the like according to the check result of the speed check unit 38 so that the speed of the train 2 is less than the speed limit.

  The processing when the ATC signal is transmitted from the transmitter 4b of the ground device 1 to the track circuit 2T where the train 2 is located and the traveling position of the train is detected by the on-board device 3 will be described with reference to the waveform diagram of FIG. To do.

  When the train 2 is traveling on the track circuit 2T, the receiving unit 31 receives the ATC signal of the carrier frequency f2 transmitted from the transmitter 4b to the track circuit 2T. The reception level detector 32 monitors changes in the reception level of the ATC signal of the carrier frequency f2 received by the receiver 31. Further, the reception content detection unit 33 detects the carrier frequency f2 of the received ATC signal and outputs a signal indicating the carrier frequency f2 to the track circuit boundary determination unit 34. In this state, when the reception level of the ATC signal at the position A shown in FIG. 2 becomes lower than the threshold value STh due to the influence of an object that interferes with electromagnetic induction such as an iron plate near the line, the reception level detector 32 receives the reception level. A signal indicating the decrease is output to the track circuit boundary determination unit 34. The track circuit boundary determination unit 34 receives a signal indicating that the reception level of the ATC signal is lower than the threshold value STh from the reception level detection unit 32 when the signal indicating the carrier frequency f2 is input from the reception content detection unit 33. Then, the point A at that time is determined as a temporary track circuit boundary.

  Thereafter, the ATC signal received by the receiving unit 31 becomes higher than the threshold value STh without being affected by the object that interferes with electromagnetic induction existing in the vicinity of the track, and the track circuit boundary determining unit 34 receives the ATC from the reception level detecting unit 32. When a signal indicating that the reception level of the signal is higher than the threshold value STh is input, the signal indicating the carrier frequency input from the reception content detection unit 33 is confirmed, and the same carrier frequency f2 as that before the reception level of the ATC signal is decreased. When the signal indicating is input, the determination with the point A as the temporary track circuit boundary is discarded.

  When the train 1 travels and reaches the vicinity of the boundary of the track circuit 2T on the train advance side, the reception level of the ATC signal of the carrier frequency f2 received by the receiving unit 31 is sharply decreased and becomes lower than the threshold value STh. The level detection unit 32 outputs a signal indicating a decrease in reception level to the track circuit boundary determination unit 34. The track circuit boundary determination unit 34 receives a signal indicating that the reception level of the ATC signal is lower than the threshold value STh from the reception level detection unit 32 when the signal indicating the carrier frequency f2 is input from the reception content detection unit 33. Then, the point at that time is determined as a temporary track circuit boundary. In this state, when the train 2 passes the track boundary between the track circuit 2T and the track circuit 3T and receives the ATC signal of the carrier frequency f3 transmitted from the transmitter 4c to the track circuit 3T, the reception unit 31 detects the received content. The unit 33 outputs a signal indicating the carrier frequency f3 to the track circuit boundary determination unit 34. In this state, the reception level detection unit 32 detects that the reception level of the ATC signal is higher than the threshold value STh, and the track circuit boundary determination unit 34 indicates that the reception level of the ATC signal is higher than the threshold value STh. Is output, the track circuit boundary determination unit 34 checks the signal indicating the carrier frequency f3 input from the reception content detection unit 33, and indicates a signal indicating the carrier frequency f3 different from the carrier frequency f2 before the reception level of the ATC signal decreases. Is confirmed, the determined temporary track circuit boundary is determined as the track circuit boundary between the track circuit 2T and the track circuit 3T, and is output to the on-line position detection unit 35.

  The track position detection unit 35 integrates the speed pulse output from the speed generator 11 to calculate the travel distance of the train 2 and detects the travel position, and then the track circuit boundary determination unit 34 and the track circuit 2T. When a signal indicating the track circuit boundary of the circuit 3T is input, the detected traveling position of the train 2 is corrected to the position of the track circuit boundary between the track circuit 2T and the track circuit 3T stored in the track circuit boundary storage unit 30. To the arithmetic processing unit 37. The arithmetic processing unit 37 creates a speed pattern of the train 2 by referring to the change information included in the ATC signal demodulated by the demodulating unit 36 and the traveling position of the train 2 and outputs the speed pattern to the speed checking unit 38. The speed checking unit 38 The speed indicated by the input speed pattern and the speed of the train 2 are collated, verified, and output to the speed control unit 39. The speed control unit 39 controls the brake device and the like according to the check result of the speed check unit 38 so that the speed of the train 2 is less than the speed limit.

  Thus, for example, even if the reception level of the ATC signal received by the receiving unit 31 is lowered due to the influence of an object that interferes with electromagnetic induction such as an iron plate existing near the track, the position where the reception level is reduced It is possible to prevent misidentification as the track circuit boundary between the circuit 2T and the track circuit 3T, and the track circuit boundary between the track circuit 2T and the track circuit 3T is accurately detected by the on-board device 3 to stabilize the traveling position of the train 2. And the train 2 can be controlled.

  In the above description, the carrier frequency f1 to f3 of the ATC signal received by the reception content detection unit 33 is detected and output to the track circuit boundary determination unit 34. However, as shown in the block diagram of the on-board device in FIG. In addition, the reception content detection unit 33 may detect the track circuit number included in the ATC signal demodulated by the demodulation unit 36 and output it to the track circuit boundary determination unit 34.

  In the above description, the case where the insulated track circuits 1T to 4T having track insulation are used as the transmission path of the ATC signal is shown. However, as shown in FIG. 5, the carrier frequency transmitted from the transmitter 4b to the track circuit 2T. Even when the non-insulated track circuits 1T to 4T to which the ATC signal of the carrier frequency f3 transmitted from the transmitter 4c to the track circuit 3T together with the ATC signal of f2 is used as the transmission path of the ATC signal, the threshold of the reception level of the ATC signal By appropriately setting STh, the track circuit boundary between the track circuit 2T and the track circuit 3T can be detected with high accuracy by the on-board device 3 and the traveling position of the train 2 can be detected stably.

1; ground device, 2; train, 3; on-board device, 4; transmitter, 5; receiver,
6; Condition communication circuit, 10; Power receiver, 11; Speed generator, 30; Track circuit boundary storage unit,
31; Reception unit, 32; Reception level detection unit, 33; Received content detection unit,
34; track circuit boundary determination unit, 35; standing line position detection unit, 36; demodulation unit,
37; arithmetic processing unit, 38; speed checking unit, 39; speed control unit.

Japanese Patent No. 3443792 Japanese Patent No. 4087786

Claims (2)

It has a ground device and an on-board device mounted on the train,
The ground device is connected to the vicinity of the boundary of each track circuit on the train advance side, has a track circuit number for specifying the connected track circuit, and transmits a transmitter that transmits an ATC signal having a different carrier frequency for each track circuit. Have
The on-board device has a reception unit, a reception level detection unit, a reception content detection unit, and a track circuit boundary determination unit,
The receiving unit receives an ATC signal transmitted to each track circuit via a power receiver,
The reception level detection unit monitors a change in the received ATC signal, determines whether the reception level is lower than a preset threshold value, and outputs to the track circuit boundary determination unit,
The reception content detection unit detects a carrier frequency included in the received ATC signal, and outputs a carrier frequency of the ATC signal to the track circuit boundary determination unit,
The track circuit boundary determination unit receives a signal indicating that the reception level of the ATC signal is lower than a threshold value from the reception level detection unit when the carrier frequency of the ATC signal is input from the reception content detection unit. Then, the point at that time is determined to be a temporary track circuit boundary, and then a signal indicating that the reception level of the ATC signal is higher than a threshold value is input from the reception level detection unit, and then input from the reception content detection unit. Check the carrier frequency of the ATC signal, and if the carrier frequency of the ATC signal whose reception level is higher than the threshold is the same as the carrier frequency of the ATC signal at the temporary track circuit boundary, discard the determined temporary track circuit boundary. If the carrier frequency of the ATC signal whose reception level is higher than the threshold is different from the carrier frequency of the ATC signal at the temporary track circuit boundary, Automatic train control, which comprises determining the track circuit boundary provisional true track circuit boundaries. The on-board device has a track circuit boundary storage unit and a standing line position detection unit,
In the track circuit boundary storage unit, track circuit boundaries of each track circuit are stored in advance, and the track position detection unit calculates the travel distance of the train by integrating the speed pulse output from the speed generator to calculate the travel position When the signal indicating the track circuit boundary is input from the track circuit boundary determination unit, the position of the track circuit boundary of each track circuit stored in the track circuit boundary storage unit is detected. The automatic train control apparatus according to claim 1, wherein the automatic train control apparatus corrects to

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