JP4201495B2 - Digital transmission automatic train controller - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a digital transmission type automatic train control (hereinafter referred to as ATC) device that automatically controls a train speed by transmitting a digital ATC signal that repeats a telegram from the ground side to the vehicle upper side. The present invention relates to a digital transmission type ATC device that enables a device to receive an accurate electronic message quickly after passing a track circuit boundary.
[0002]
[Prior art]
In general, the ATC device transmits an ATC signal indicating allowable driving speed information from the ground device to the on-board device according to the distance from the preceding train and the route opening condition, and the train speed is set at the upper limit on the upper side of the vehicle. It is a device that automatically performs speed control based on the received ATC signal so as to be as follows.
[0003]
In recent years, there has been an increasing need for fine train operation control corresponding to high-speed and high-density operation, and an ATC device capable of optimal control even when trains with various vehicle performances coexist is desired. From such a point of view, a digital transmission type ATC device that realizes multi-information transmission between the ground and the vehicle using digital signals has been proposed.
[0004]
Information transmission in such an ATC device of the digital transmission method is performed in units of telegrams including speed control information related to train speed control such as distance information to the preceding train and train route information. The digital ATC signal consisting of is transmitted to the vehicle upper side via the rail. On the other hand, on the vehicle upper side, based on the content of the message of the received ATC signal, for example, the distance to the stop point or the speed limit section is calculated, a brake pattern indicating an allowable speed is created, and speed control is performed according to the created brake pattern. Execute.
[0005]
[Problems to be solved by the invention]
By the way, when adopting the ATC device of the digital transmission system as described above, the ground device provided for each of a plurality of continuous track circuits can detect the ATC signal telegram so that it can always detect the entry of the train into the track circuit. Is sent to the track circuit that has jurisdiction over and over at regular intervals. For this reason, when the train passes the track circuit boundary, the message of the ATC signal received by the on-board device mounted on the train is merged with a part of the transmission message of the adjacent track circuits and formed as one message There was a rare chance of doing so. If such a message (hereinafter referred to as a merged message) is incorrect speed control information, incorrect train speed control may be performed.
[0006]
Therefore, in order to solve such a problem, the on-board device adopts the contents of the message as regular reception information when it is determined that the contents of the two continuously received messages match, and when they do not match There has been proposed a digital transmission ATC device that does not employ the received message.
However, in such a system, in order to adopt a message, at least two messages must be received, and an extra reception time for one message is required. Therefore, a control delay for one telegram time occurs in the on-board device, and there is a possibility that the operation efficiency of the train is lowered.
[0007]
If the track circuit length is short, the on-board device may not be able to continuously receive two or more messages while the train passes the track circuit. In such a case, the on-board device may not be able to receive the latest information in the track circuit in the existing line, and there is a possibility that the delay in speed control will further increase.
Furthermore, as the amount of information increases, the length of the message also increases, so there is a high possibility that the on-board device will not be able to receive the latest information in the track circuit in the line, and fine train operation that supports high-speed and high-density operation. There is a possibility that the merit of adopting the digital transmission method for the purpose of control may be lost.
[0008]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a digital transmission type ATC device capable of receiving an accurate electronic message immediately after the on-board device has passed the track circuit boundary.
[0009]
[Means for Solving the Problems]
Therefore, the invention according to claim 1 is included in the message of the ATC signal that the ground device transmits a digital ATC signal that repeats a message including the speed control information of the train to the track circuit and is received via the track circuit. In the digital transmission type automatic train control device in which the on-board device automatically controls the speed of the train based on the speed control information, the on-board device has a track circuit when reception of the ATC signal from the ground stops for a certain time. A configuration in which it is determined that the boundary has passed, and a message immediately before the reception is stopped is deleted, and the ground device resets the message when transmission of the ATC signal is stopped, and transmits from the beginning of the message after the predetermined time has elapsed. It is characterized by that .
[0010]
In such a configuration, when the on-board device determines that the train has passed the track circuit boundary because reception of the ATC signal sent from the ground side has stopped for a certain period of time, the on-board device deletes the message received immediately before the ATC signal stops. To do. Also, the ground on the device resets the message when stopping the transmission of the ATC signal, that sends the after a certain time from the first message.
[0012]
In the invention according to claim 2 , the ground device transmits the ATC signal from the front end side of the track circuit, receives the ATC signal from the rear end of the track circuit, and the reception level of the ATC signal is a threshold. A train detection means for detecting the train circuit approach when the train detection means detects a train, and when the train detection means detects a train, the transmission of the ATC signal is stopped for the predetermined time, and the message being transmitted And a transmission control means for transmitting from the beginning of the message when transmission of the ATC signal is resumed, and the on-board device stores the message of the ATC signal received from the ground device. Timing when the electronic message is stored and when the predetermined time equal to or longer than the predetermined time elapses, and the trajectory before the time measuring means counts the predetermined time. When it is determined that the road boundary passing was configured with a message erasure control means for erasing the stored message, the.
[0013]
In such a configuration, the ground device, upon detecting entry into the train of a track circuit by the reception level of the ATC signal is lower than the threshold value, the over-track circuit boundary passing by predetermined time stops the transmission of the ATC signal In addition to notifying the upper side of the vehicle, the telegram being transmitted is reset and transmitted from the beginning of the telegram when transmission is resumed. On the other hand, when the onboard device determines that the track circuit boundary has been passed due to the reception of the ATC signal from the ground side being stopped for a certain period of time , the currently stored message is erased.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing an embodiment of a digital transmission ATC device according to the present invention. In the present embodiment, the case where there are three track circuits is illustrated, but it goes without saying that the number of track circuits is not limited to three.
[0015]
In FIG. 1, a digital transmission ATC device according to the present embodiment is mounted on a ground device 1 that transmits digital ATC signals to track circuits 1T to 3T and a train 2 and is provided at the lower end of the train 2. And an on-vehicle receiving device 4 as an on-vehicle device that receives a digital ATC signal flowing in a track circuit in the line through the coil 3.
[0016]
The ground device 1 is provided for each continuous track circuit 1T to 3T on the train track, transmits a digital ATC signal from the front end 1Ta to 3Ta of each track circuit 1T to 3T, and transmits the ATC signal from the rear end 1Tb to 3Tb. Track circuit transmission / reception devices 5 to 7, transmission / reception devices 5 to 7 of each of the track circuits 1T to 3T, and a transmission line 9 that electrically connects the interlocking device 8 that controls the route of the train 2 in a communicable manner, It is configured with.
[0017]
FIG. 2 is a block diagram of the track circuit transmitting / receiving devices 5 to 7 according to the present embodiment. In addition, since the structure of each track circuit transmission / reception apparatus 5-7 is the same, the track circuit transmission / reception apparatus 6 provided in the track circuit 2T is demonstrated here, and the description about the other track circuit transmission / reception apparatuses 5 and 7 is abbreviate | omitted. To do.
In FIG. 2, the track circuit transmission / reception device 6 creates a message based on information received from the track circuit transmission / reception device 7 in front, the interlocking device 8 and the like, and sends a digital ATC signal for repeating the message to the tip 2Ta of the track circuit 2T. The transmitter 10 that transmits to the track circuit 2T and the ATC signal flowing through the track circuit 2T are received from the rear end 2Tb of the track circuit 2T, and the transmitter 10 is notified that the train 2 that has entered the track circuit 2T has been detected. Train position information for notifying the rear track circuit transmitting / receiving device 5 whether or not the train 2 is present in the track circuit 2T based on the reception level and contents of the ATC signal. And the train position information created by the receiver 20 is transmitted to the rear track circuit transmitting / receiving device 5 via the transmission path 9, and the track of the front track circuit 3T is transmitted. Configured to include a transmitter 30 which is received through the transmission path 9 the information needed to create a message from the circuit transceiver 7 and interlock device 8, etc., and transmits the received information to the transmitter 10.
[0018]
The transmitter 10 creates speed control information based on the information transmitted from the transmitter 30, and outputs the created speed control information to the memory unit 12A according to the output permission signal from the counter 12B or the transmission control unit 13, An information creation unit 11 that outputs an output completion signal indicating that the output of the speed control information has been completed to the counter 12B, a message creation unit 12 that creates a message based on the speed control information from the information creation unit 11, and a level A transmission control unit 13 that performs transmission control of a message when receiving the train detection signal from the determination unit 22, a modulator 14 that performs FSK (Frequency shift Keying) modulation of the generated message, and a modulator 14 And an amplifier 15 that amplifies the modulated wave and outputs a digital ATC signal to the tip 2Ta of the track circuit 2T. .
[0019]
The message creation unit 12 takes in the speed control information created by the information creation unit 11 and assigns the speed control information as information data to form a message, and the output completion signal from the information creation unit 11 Counting is started based on this, and a signal for outputting a message in conjunction with the count is output to the memory unit 12A, and the output permission signal is output when the signal is counted up in a time corresponding to a preset message length. A counter 12B that outputs to the creation unit 11 and a signal conversion unit 12C that performs signal conversion of a telegram output from the memory unit 12A are configured.
[0020]
The transmission control unit 13 generates a reset signal for forcibly resetting the counter 12B by receiving the train detection signal output from the level determination unit 22, and resets the counter 12B. At the same time, an output stop signal for stopping the output of the digital ATC signal for a certain period of time is output to the information generator 11 and the modulator 14 so that the on-vehicle receiver 4 can determine the passage of the track 2T boundary of the train 2 To do. Then, the output permission signal is output to the information creation unit 11 when the predetermined time has elapsed.
[0021]
Here, the information creation unit 11, the transmission control unit 13, and the message creation unit 12 constitute a message transmission control unit.
For example, as shown in FIG. 3, the telegram formed in the memory unit 12 </ b> A is information in which a flag indicating the start of the telegram and speed control information necessary for the on-board receiving device 4 to control the speed of the train 2 are assigned. It is composed of data and CRC (Cyclic Redundancy Check) codes for testing data errors that occur when noise is mixed in the transmission process.
[0022]
The speed control information includes information on the number of track circuits up to the preceding train created based on the train position information from each track circuit transmission / reception device in front, the allowable speed information of the train 2 in the track circuit 2T, and the linkage device 8 Information related to speed control of the train 2 such as route route information created based on the operation status is included.
The receiver 20 determines the level of the band filter (BPF) 21 for removing noise included in the received signal such as the motor current of the train 2 flowing in the track circuit 2T, and the level of the ATC signal output from the band filter 21. When the reception level falls below the threshold value, the train detection signal is output to the transmission control unit 13 and the train presence determination unit 25. The level determination unit 22 as a train detection unit and the ATC output from the band filter 21 are also used. From the demodulator 23 that demodulates the signal, the message decryption verification unit 24 that determines whether the demodulated message is legitimate reception information from the track circuit 2T that the track circuit transmitting / receiving device 6 has jurisdiction, and the level determination unit 22 And a train presence line determination unit 25 that creates the train position information from the output train detection signal and the determination result of the message decryption verification unit 24.
[0023]
FIG. 4 is a block diagram of the on-vehicle receiving device 4 according to the present embodiment.
In FIG. 4, the on-vehicle receiving device 4 includes a band filter (BPF) 41 for removing noise included in a received signal from the track circuit 2T, such as a motor current of the train 2 flowing in the track circuit 2T, and a ground side. In order to determine whether or not a digital ATC signal is received, a level determination unit 42 that determines whether or not the reception level from the band filter 41 has dropped below a threshold value, and an ATC signal that is also received from the band filter 41 It is determined whether the demodulator 43 to demodulate and the demodulated message is received information from the track circuit 2T under the control of the track circuit transmitting / receiving device 6, and the message is determined to be received information from the track circuit 2T. Sometimes, a message as the received information is output to a memory unit 45A as a storage means described later, and a timer start signal is output to the timer unit 45C to start the timer. Telegram adoption processing that adopts the telegram received from the telegram decryption collation unit 44 based on the determination result of the decryption collation unit 44 and the level determination unit 42 and outputs the telegram to the speed control unit 50 that controls the speed of the train 2 And a unit 45.
[0024]
The message adoption processing unit 45 receives the track circuit boundary passage information when the decrease in the reception level in the memory unit 45A for storing the message output from the message decryption verification unit 44 and the level determination unit 42 continues for the predetermined time. The lowering detection unit 45B that generates a signal for erasing the stored contents of the memory unit 45A and the timer start signal output from the message decryption collation unit 44 is started by a preset predetermined time or more. When the time elapses and the time is up, a timer unit 45C serving as a timing unit that outputs a signal for outputting a message to the memory unit 45A, a message output from the memory unit 45A, and the received message is properly received. And an adopted telegram unit 45D that outputs the information to a speed control unit 50 that controls the speed of the train 2 as information.
[0025]
Here, the memory unit 45A, the drop detection unit 45B, and the timer unit 45C constitute a message erasure control means.
Next, the operation of the digital transmission ATC device according to the present embodiment when the train 2 enters the track circuit 2T will be described with reference to FIGS.
FIG. 5 shows the digital ATC signal reception level (FIG. (A)) received by the receiver 20 of the track circuit transmitting / receiving device 6 when the train 2 enters the track circuit 2T, and the digital ATC signal reception level. In response, the train detection signal (FIG. (B)) generated by the level determination unit 22, the reset signal (FIG. (C)) generated by the transmission control unit 13 to reset the counter 12B, and the track circuit transmitting / receiving device 6 It is a time chart of a digital ATC signal (figure (d)) transmitted to track circuit 2T from transmitter 10, and a digital ATC signal (figure (e)) which onboard receiving device 4 receives.
[0026]
Before the train 2 passes the boundary of the track circuit 2T, the level determination unit 22 of the track circuit transmission / reception device 6 receives the digital ATC signal transmitted from the transmitter 10 via the rail and the bandpass filter 21, so that the digital ATC It is determined that the signal reception level is equal to or higher than a threshold value (trigger level in the figure), and a train detection signal in a signal form (high level in the figure) indicating that the train 2 has not entered the track circuit 2T It outputs to the standing line determination part 25 (FIG. 5 (a), (b)). At the same time, the message decryption collation unit 24 determines whether or not the message demodulated by the demodulator 23 is legitimate reception information from the track circuit 2T managed by the track circuit transmitting / receiving device 6, and determines the determination result as the train presence line determination. To the unit 25.
[0027]
If the train presence determination unit 25 determines that the message decoding / verification unit 24 has received regular reception information, the train presence determination unit 25 determines that the train 2 is not on the track circuit 2T, and transmits train position information indicating no train. The signal is transmitted to the rear track circuit transmitting / receiving device 5 via the path 9.
When the train 2 passes the track circuit 2T boundary, the rails of the track circuit 2T are short-circuited by the wheels of the train 2, so that the reception level of the ATC signal received by the receiver 20 at the rear end 2Tb of the track circuit 2T is determined as a level. It falls below the threshold value set in the section 22 (FIG. 5A). Therefore, the level determination unit 22 detects that the train 2 has entered the track circuit 2T, and transmits a train detection signal in a signal form (low level in the figure) indicating that the train 2 has entered the track circuit 2T. 13 and the train presence determination unit 25 (FIG. 5B).
[0028]
The train presence determination unit 25 determines that the level determination unit 22 determines that the reception level of the digital ATC signal is equal to or higher than the threshold value, and the message decryption verification unit 24 determines that the reception information is legitimate reception information. It is determined that there is no train, otherwise it is determined that there is a train. Therefore, if the train presence line determination unit 25 inputs from the level determination unit 22 a train detection signal indicating that the reception level of the digital ATC signal has decreased below the threshold value, whether the reception information is regular information or not. Regardless, it is determined that the train 2 is in the track circuit 2T. Then, the train presence determination unit 25 transmits train position information indicating that there is a train to the rear track circuit transmitting / receiving device 5.
[0029]
When the transmission control unit 13 receives a train detection signal indicating that the train 2 has entered the track circuit 2T from the level determination unit 22, the transmission control unit 13 generates the reset signal and stops the output to the information creation unit 11 and the modulator 14. The signal is output for the predetermined time t, and the transmission of the digital ATC signal from the transmitter 10 to the track circuit 2T is stopped for the predetermined time t (FIGS. 5C and 5D). The counter 12B performs a reset operation based on the reset signal and resets the output of the memory unit 12A.
[0030]
When the predetermined time t has elapsed, the transmission control unit 13 outputs the output permission signal to the information creation unit 11. The information creation unit 11 that has received the output permission signal outputs the currently held speed control information to the memory unit 12A, and outputs the output completion signal to the counter 12B when the output is completed.
When the counter 12B restarts counting by receiving the output completion signal, the memory unit 12A allocates the speed control information from the information creating unit 11 as information data to form a message, and in conjunction with the count of the counter 12B, the formed message Is output from the beginning. When the counter 12B measures the time corresponding to the preset message length and counts up, the output of one message is completed. Thereafter, every time the counter 12B counts up, the output of the message is repeated (FIG. 5 (d)). The speed control information created by the information creation unit 11 is updated as needed by changing the information sent from the transmitter 30.
[0031]
The signal conversion unit 12C sequentially performs P / S (parallel / serial) conversion on the information output from the memory unit 12A, and sequentially outputs the converted information according to the counting operation of the counter 12B.
The telegram created by the telegram creator 12 is FSK modulated by the modulator 14, amplified by the amplifier 15, and transmission of the digital ATC signal from the transmitter 10 to the track circuit 2T is resumed.
[0032]
On the other hand, the on-board receiving device 4 is a digital signal transmitted from the track transmitting / receiving device 6 after the track circuit transmitting / receiving device 6 detects the approach of the train 2 to the track circuit 2T until the transmission of the ATC signal is stopped. When the ATC signal message and the digital ATC signal message transmitted from the track circuit transmitting / receiving device 5 of the track circuit 1T immediately before the train 2 enters the track circuit 2T, are combined to form a merged message. There is. (FIG.5 (e) shaded part). In this case, the message decryption collation unit 44 outputs the merged message to the memory unit 45A and also outputs the timer start signal to the timer unit 45C to start the timer (FIG. 5 (e)).
[0033]
When the reception level of the ATC signal from the track circuit transmitting / receiving device 6 falls below the threshold value set by the level determination unit 42 and the level drop continues for a certain time t, the drop detection unit 45B displays track circuit boundary passage information. A signal for erasing the stored contents of the memory 45A is generated assuming that it has been received, and the signal is output to the memory unit 45A. If the timer of the timer unit 45C has not expired when the signal from the lowering detection unit 45B is received, the memory unit 45A outputs a signal for resetting the timer to the timer unit 45C and resets the timer. And the message | telegram memorize | stored in the memory part 45A is erase | eliminated (FIG.5 (e)).
[0034]
When transmission of the digital ATC signal from the track circuit transmitting / receiving device 6 to the track circuit 2T is resumed, the digital ATC signal is output to the level determination unit 42 and the demodulator 43 via the reception coil 3 and the band filter 41.
At this time, the level determination unit 42 receives the digital ATC signal, and thus determines that the reception level is equal to or higher than the threshold value. On the other hand, the message decryption collation unit 44 determines whether or not the message of the digital ATC signal demodulated by the demodulator 43 is received information from the track circuit 2T managed by the track circuit transmitting / receiving device 6, and receives the message from the track circuit 2T. If it is received information, the message is output to the memory unit 45A. At the same time, the message decryption collation unit 44 outputs the timer start signal to the timer unit 45C to start the timer (FIG. 5 (e)).
[0035]
When the timer of the timer unit 45C counts up the predetermined time and the time is up, the timer unit 45C outputs a signal for outputting a message to the memory unit 45A and adopts the message stored in the memory unit 45A. Output to sentence section 45D.
When the adopted telegram unit 45D receives a message from the memory unit 45A, the adopted message unit 45D erases the previously held message and newly holds the received message as regular reception information, and controls the speed of the train 2 with the held message. Is output to the speed control unit 50.
[0036]
The speed control unit 50 creates a brake pattern indicating the allowable speed of the train 2 based on the contents of the message output from the adopted message unit 45D. Then, for example, brake control is performed to perform automatic speed control of the train 2 so that the actual speed of the train 2 does not exceed the created brake pattern.
As described above, the on-vehicle receiving device 4 considers that the train track boundary passage information has been received by stopping the reception of the ATC signal from the track circuit transmission / reception device for a certain period of time, and is received immediately before receiving the train track boundary passage information. The on-board receiving device 4 can discard the merged message generated at the track circuit boundary, and can quickly receive the correct ATC signal message after passing the track circuit boundary. As a result, a digital transmission ATC device that can smoothly control the speed of the train can be realized.
[0037]
As in this embodiment, if the track circuit transmitter / receiver stops transmission of the digital ATC signal for a certain period of time and then transmits the ATC signal from the beginning of the telegram when transmission is resumed, the track circuit approach detection of the train is detected. Later, an accurate ATC signal can be transmitted to the on-vehicle receiving device 4 more quickly, but it is not always necessary to retransmit from the beginning of the message.
[0039]
【The invention's effect】
As described above, according to the first aspect of the present invention, the on-board device can discard the erroneous information received at the track circuit boundary without performing the conventional two-message continuous match determination, and can track the track circuit boundary. After passing, you can promptly receive an accurate telegram from the ground side. As a result, the on-board device can control the speed based on the latest information, and can improve the operation efficiency of the train as compared with the conventional system. Further, the on-board device does not receive the track circuit boundary passage information having the wrong contents, and can reliably know that the train has entered the track circuit.
[0040]
Further, the ground on the device after the track circuit boundary passing of the train, can send more quickly correct message to the car top, it is possible to further improve the operation efficiency of the train.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an embodiment of a digital transmission ATC device according to the present invention. FIG. 2 is a block diagram of a track circuit transmitting / receiving device according to the embodiment. FIG. 3 is a digital transmission according to the embodiment. The figure which showed the structure of the message | telegram used for information transmission of a type | formula ATC apparatus. [FIG. 4] The block diagram of the receiving apparatus on board which concerns on this embodiment same as the above. [FIG. 5] Operation | movement of the digital transmission type ATC apparatus which concerns on this embodiment. Time chart [Explanation of symbols]
1 to 3 Track circuit transmission / reception devices 1T to 3T Track circuit 2 Train 4 On-vehicle receiver 10 Transmitter 11 Information creation unit 12 Message creation unit 12A Memory unit 12B Counter 13 Transmission control unit 20 Receiver 22 Level determination unit 45 Message adoption processing 45A Memory unit 45B Lowering detection unit 45C Timer unit 45D Adopted message unit

Claims (2)

The ground device transmits a digital ATC signal that repeats a telegram including train speed control information to the track circuit, and the on-board device is based on the speed control information included in the telegram of the ATC signal received via the track circuit. In the digital transmission type automatic train control device that automatically controls the train speed,
The on-board device is configured to determine that the track circuit boundary has passed when reception of the ATC signal from the ground is stopped for a certain period of time, and to delete the message immediately before the reception is stopped .
The digital transmission type automatic train control device , wherein the ground device is configured to reset a telegram when transmission of an ATC signal is stopped and transmit the telegram from the beginning of the telegram after the predetermined time has elapsed . The ground device transmits the ATC signal from the front end side of the track circuit, receives the ATC signal from the rear end of the track circuit, and determines that the reception level of the ATC signal is smaller than a threshold value. Train detection means for detecting the track circuit approach of
When the train detection means detects a train, the transmission of the ATC signal is stopped for the predetermined time, the transmission message is reset to stop transmission, and the transmission of the ATC signal is resumed from the beginning when transmission is resumed. Transmission control means,
The on-board device has storage means for storing a telegram of an ATC signal received from the ground device;
Timing means for starting timing when the electronic message is stored, and time-up when a predetermined time of the predetermined time or more has elapsed;
A message erasure control means for erasing the stored message when the timing means determines that the track circuit boundary has passed before the predetermined time is measured;
The digital transmission type automatic speed control device according to claim 1 , comprising:

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