JP6041771B2 - Train radio system - Google Patents

Description

  The present invention relates to a train radio system.

  In a conventional train radio system, on-board radio devices and on-board control devices are mounted on both leading vehicles of a train, and radio base stations (hereinafter referred to as “base stations”) and radio devices on the train are wireless. By communicating, information is transmitted between the on-board control device and the ground control device. However, if two on-board wireless devices in the same train transmit a wireless signal to the base station at the same time, the wireless signals will collide, so in the conventional train wireless system, each on-board controller communicates with each other. The on-board wireless device mounted on one of the leading vehicles and the on-board control device connected thereto are used as representative station devices, and the representative station device is configured to perform data communication with the base station. ing.

  For example, in the prior art disclosed in Patent Document 1 below, a representative station device is newly provided for wireless communication using an on-board wireless device that is not in use, and exchanges information between two on-board control devices. The on-vehicle wireless device and the on-vehicle control device assigned to are switched to the other on-vehicle wireless device and the on-vehicle control device.

JP 2012-156929 A

  Here, the conventional technique represented by the above-mentioned Patent Document 1 is, for example, when a so-called “end exchange” is performed in which the cab is exchanged with the cab on the opposite side when the train turns back at the end point or the like. Information is transmitted from the onboard wireless device of one leading vehicle to the ground control device at a constant cycle, and after end replacement, the information is transmitted from the onboard wireless device of the other leading vehicle to the ground control device at a certain cycle. It is configured to be. In the following description, information transmitted from the ground control device to the on-vehicle wireless device is “A → B information”, and information transmitted from the on-vehicle wireless device to the ground control device is “B → A information”. Called. At the time of end exchange, it is necessary to stop transmission of B → A information from one on-board wireless device and simultaneously start transmission of B → A information from the other on-board wireless device. This is because when the transmission timing of B → A information transmitted before the end exchange is not synchronized with the transmission timing of B → A information transmitted after the end exchange, the ground control device does not transmit B → A information. This is because it is determined that (temporary communication interruption) has occurred, and a wireless communication abnormality may be detected.

  In the prior art of Patent Document 1, synchronization of transmission timings of B → A information from one on-board wireless device and B → A information from the other on-board wireless device at the time of end exchange is not considered. Therefore, there is a problem that the continuity of the B → A information is not ensured, and there is a possibility that a communication abnormality may be detected in the ground control apparatus even though no abnormality has occurred in the on-board apparatus.

  This invention is made in view of the above, Comprising: It aims at obtaining the train radio system which can avoid the misdetection of the communication abnormality at the time of end exchange.

In order to solve the above-described problems and achieve the object, the present invention provides a ground control device that generates train control information for controlling train travel, and the train control information that is connected to the ground control device and receives the train control information. A radio base station that performs radio transmission, a plurality of on-board radio devices that are mounted on a train and perform radio communication with the radio base station, and connected to each on-board radio device and based on the train control information A plurality of on-board control devices that control traveling, and the ground control device gives the train control information a first serial number that is counted up every time the train control information is generated, and transmits the train control information to the train The first onboard control device connected to the first onboard wireless device that is transmitting information to the ground control device has completed the cab replacement based on the position information selected by the cab selection switch. at the timing it is detected that the A second serial number obtained by adding a predetermined value to the received first serial number is generated, and the second serial number is connected to a second on-vehicle wireless device that is not transmitting information to the ground control device. When the first serial number value reaches the second serial number value, the first on-board control device transmits information to the ground control device. A command to stop is output to the first on-board radio device, and the second on-board control device outputs an instruction to start transmission of information to the ground control device to the second on-board radio device. It is characterized by that.

  According to the present invention, there is an effect that it is possible to avoid erroneous detection of abnormality in wireless communication at the time of end exchange.

FIG. 1 is a diagram showing a configuration of a train radio system according to an embodiment of the present invention. FIG. 2 is a configuration diagram of the on-board control device. FIG. 3A is a first diagram for explaining the operation of the train radio system. FIG. 3-2 is a second diagram for explaining the operation of the train radio system. FIG. 3C is a third diagram for explaining the operation of the train radio system. FIG. 3-4 is a fourth diagram for explaining the operation of the train radio system. FIG. 3-5 is a fifth diagram for explaining the operation of the train radio system. FIG. 3-6 is a sixth diagram for explaining the operation of the train radio system.

  Hereinafter, embodiments of a train radio system according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a diagram showing a configuration of a train radio system according to an embodiment of the present invention. FIG. 2 is a configuration diagram of the on-board control device. FIG. 3A is a first diagram for explaining the operation of the train radio system. FIG. 3-2 is a second diagram for explaining the operation of the train radio system. FIG. 3C is a third diagram for explaining the operation of the train radio system. FIG. 3-4 is a fourth diagram for explaining the operation of the train radio system. FIG. 3-5 is a fifth diagram for explaining the operation of the train radio system. FIG. 3-6 is a sixth diagram for explaining the operation of the train radio system.

  The train radio system includes on-board radio devices (hereinafter “wireless devices”) 5 and 8 mounted on the train 100, on-board control devices (hereinafter “control devices”) 6 and 7 mounted on the train 100, It has a control device 16 and a radio base station 1 connected to the ground control device 16. The wireless base station 1 in the illustrated example performs wireless communication with a train 100 that stops at a terminal station or a turn-back station among a plurality of wireless base stations arranged along the track 4 on which the train 100 travels. A radio base station is shown.

  As an example, the train 100 includes two leading vehicles A and B and two intermediate vehicles C. One leading vehicle A is equipped with a wireless device 5, a control device 6, and a cab selection switch 9, and the other vehicle The leading vehicle B is equipped with a wireless device 8, a control device 7, and a cab selection switch 10. In FIG. 1, only three types of devices are shown as an example of a vehicle-mounted device. However, in addition to these devices, the actual train 100 includes a large number of devices such as a speed generator, a brake control device, and a car upper. Needless to say, it is installed.

  The control device 6 is connected to the wireless device 5 through the transmission line 3 in the leading vehicle A, and the control device 7 is connected to the wireless device 8 through the transmission line 3 in the leading vehicle B. Between these devices, the wireless base station 1 A → B information 12 transmitted to the train 100 and B → A information 11 transmitted from the train 100 to the ground are transmitted and received. The A → B information 12 is, for example, train control information for controlling the travel of the train 100, and the B → A information 11 includes, for example, train operation information, the type of the train 100, the ID of the train 100, the track position information of the train 100, This includes status information on train-equipped equipment.

  The driver's cab selection switches 9 and 10 are mounted on the driver's cab and are configured to be able to select three positions of “front”, “middle”, and “rear”. For example, when the traveling direction of the train 100 is the left side of the drawing (assuming “upward direction”), “front” is selected in the cab selection switch 9 of the leading vehicle A, and “ “After” is selected. When there is a driver's cab in the middle of the train 100 due to merging or the like, “medium” is selected with a driver's cab selection switch (not shown) of the vehicle. The position information 13 selected by the cab selection switches 9 and 10 is input to the control devices 6 and 7, respectively.

  In the train 100, the lead-in line 2 is disposed over the leading vehicles A and B and the intermediate vehicle C, and the control devices 6 and 7 are connected via the lead-in line 2 so as to communicate with each other. In addition to information related to safety control in the train 100 such as a power running command and a brake command, the lead-in line 2 includes position information 13 selected by the cab selection switches 9 and 10 and end exchange. A switching timing sequence number TN (see FIG. 3-3) transmitted from one control device to the other control device at the completion timing (end exchange completion time) is also transmitted. Details of the switching timing sequence number TN will be described later.

  When the end exchange is completed, for example, when the traveling direction of the train 100 is the left side (upward direction) in the drawing, the cab selection switch 9 is changed from “front” to “back” and the cab selection switch 10 is set to “ The timing is changed from “after” to “before”. In the control devices 6 and 7, these selected positions in the cab selection switches 9 and 10 are determined based on the position information 13 from the cab selection switches 9 and 10, and the end exchange completion time can be determined.

  As illustrated in FIG. 2, the control devices 6 and 7 include a speed control unit 20, a switching timing sequence number generation unit 21, and a radio control unit 22.

  The speed control unit 20 generates on-line position information of the train 100 based on the ground element information from the ground element arranged on the track 4 and the speed information detected by the speed detector, and the on-line position information is changed from B → A. Information 11 is transmitted to the ground control device 16 via the wireless devices 5 and 8 and the wireless base station 1.

  In the ground control device 16, stop limit position information is generated based on the on-line position information from each train on the track 4, and the generated stop limit position information is A → B information 12 and the radio base station 1 and the radio It is transmitted to the control devices 6 and 7 via the devices 5 and 8. When the speed control unit 20 of the control devices 6 and 7 that has received the stop limit position information generates a speed check pattern and the train speed exceeds the speed check pattern, the speed control unit 20 sends a brake control device (not shown). In response, a brake command is output. For example, when the train 100 approaches a preceding train (not shown) while traveling, the brake is automatically applied by the brake control device. According to the train radio system configured as described above, it is possible not only to control the speed of the train without using a conventional track circuit, but also to reduce costs and improve safety, as well as appropriate train intervals. By performing the control, the transportation efficiency can be improved.

  Next, the function of the switching timing sequence number generation unit 21 will be described. When the two wireless devices 5 and 8 transmit the B → A information 11 to the wireless base station 1 at the same time, the wireless signals collide (contention on the wireless channel occurs). Therefore, at the time of end exchange, transmission of B → A information 11 by one wireless device (for example, wireless device 5) that has transmitted B → A information 11 is stopped, and then B → A information by the other wireless device 8 is stopped. 11 transmissions need to be started.

  However, if the transmission timing of the B → A information 11 before and after the end exchange completion is not synchronized, the ground control device 16 determines that the B → A information 11 has been lost, and a wireless communication abnormality can be detected. There is sex. In order to avoid such a situation, at the time when the end exchange is completed, the transmission of the B → A information 11 from the wireless device 5 is stopped and the transmission of the B → A information 11 by the wireless device 8 is started at the same time. It is necessary to synchronize the transmission timing of B → A information 11 after the end exchange completion time with the transmission timing of B → A information 11 before the exchange completion time point.

  Therefore, in the train radio system according to the present embodiment, the switching timing sequence number generation unit 21 of the control device 6 connected to the radio device (for example, the radio device 5) that is transmitting the B → A information 11 includes the cab selection switch 9. , 10 is used to monitor the state of the cab selection switches 9 and 10, the cab selection switch 9 is changed from “front” to “rear”, and the cab selection switch 10 is changed from “rear”. When changed to “Previous”, switching is performed by adding a value corresponding to a predetermined time (for example, transmission delay time α of the lead-in line 2) to the control sequence number N included in the A → B information 12 received at this timing. The timing sequence number TN is generated and transmitted to the control device 7 connected to the wireless device (for example, the wireless device 6) whose transmission of the B → A information 11 is stopped.

  The control sequence number N (see FIG. 3-1) is a number that is counted up every time the A → B information 12 is generated at a predetermined cycle in the ground control device 16, and is a cyclic number from 1 to 255, for example. It is.

  The switching timing sequence number TN indicates that after the end exchange is completed, the transmission of the B → A information 11 from the wireless device 5 is stopped simultaneously with the start of the transmission of the B → A information 11 by the wireless device 8, and the end exchange is completed. The timing of the B → A information 11 transmitted after the end exchange completion time can be synchronized with the timing of the B → A information 11 transmitted before.

  Next, functions of the wireless control unit 22 will be described. The wireless control unit 22 of the control device 6 connected to the wireless device (for example, the wireless device 5) that is transmitting the B → A information 11 has the control sequence number N included in the A → B information 12 received by the wireless device 5. The transmission stop command 14 is generated when the value of the control sequence number N reaches the value of the switching timing sequence number TN. The transmission stop command 14 is a command for stopping the information transmission operation of the wireless devices 5 and 8 that were transmitting the B → A information 11.

  On the other hand, the wireless control unit 22 of the control device 7 connected to the wireless device (for example, the wireless device 8) whose transmission of the B → A information 11 is stopped controls the control included in the A → B information 12 received by the wireless device 8. The value of the serial number N is compared with the switching timing serial number TN transmitted from the control device 6, and the transmission start command 15 is generated when the value of the control serial number N reaches the value of the switching timing serial number TN. The transmission start command 15 is a command for starting the information transmission operation of the wireless devices 5 and 8 that have stopped transmitting the B → A information 11.

  The operation will be described below. FIG. 3A shows the train 100 before the transmission of the B → A information 11 is performed from the wireless device 5 of the leading vehicle A, and the control number N “10” is transmitted from the wireless base station 1 to each of the wireless devices 5 and 8. A → B information 12 to which “” is assigned is transmitted, but B → A information 11 from the wireless devices 5 and 8 to the wireless base station 1 is in a stopped state. When the train 100 travels in the upward direction in such a state, a transmission start command 15 is transmitted from the control device 6 to the wireless device 5, and a transmission stop command 14 is transmitted from the control device 7 to the wireless device 8. 3-2 shows the train 100 in which transmission of the B → A information 11 is started, and the control devices 6 and 7 that have received the A → B information 12 control serial numbers in response to the A → B information 12. B → A information 11 including N “10” is generated, and the wireless apparatus 5 that has received the transmission start command 15 starts wireless transmission of the B → A information 11. In the example of FIGS. 3A and 3B, the cab selection switch 9 is selected as “front” and the cab selection switch 10 is selected as “back”. Based on the position information 13 from the selection switches 9 and 10, it is determined that it is before end exchange. Accordingly, the control device 6 connected to the wireless device 5 that is transmitting the B → A information 11 does not generate the switching timing sequence number TN, and the wireless transmission of the B → A information 11 by the wireless device 5 is continued.

  FIG. 3-3 shows the train 100 after the end exchange. In the train 100 of FIG. 3-3, the cab selection switch 9 is selected as “rear” and the cab selection switch 10 is selected as “front”. Yes. It should be noted that the period from the time when the cab selection switch 9 is switched from “front” to “back” to the time when the cab selection switch 10 is switched from “back” to “front”, that is, the cab selection switches 9 and 10. The switching timing sequence number TN is not generated during the period in which the state is “after” and “after”. Therefore, transmission of the B → A information 11 from the wireless device 5 is continued during this end exchange period, and communication between the ground control device 16 and the train 100 is continued.

  Thereafter, when the cab selection switches 9 and 10 are “back” and “front”, it is determined that the end exchange has been completed in the control device 6 connected to the wireless device 5 that is transmitting the B → A information 11. Thus, the switching timing sequence number TN is generated, and the generated switching timing sequence number TN is transmitted to the control device 7. The value (= 15) of the switching timing sequence number TN in the illustrated example is a value when α is assumed to be “3”.

  FIG. 3-4 shows the train 100 after the end exchange as in FIG. 3-3, except that the control sequence number N included in the A → B information 12 is counted up to “14”. To do. In the illustrated example, since the value of the control sequence number N has not reached the value of the switching timing sequence number TN, the control device 6 does not generate the transmission stop command 14 for the wireless device 5, and the control device 7 transmits the transmission start command 15 for the wireless device 8. Is not generated. Accordingly, the transmission of the B → A information 11 from the wireless device 5 is continued, and the transmission of the B → A information 11 from the wireless device 8 is not performed.

  When the control sequence number N included in the A → B information 12 is counted up to “15” as shown in FIG. 3-5, the value of the control sequence number N has reached the value of the switching timing sequence number TN. The control unit 22 generates a transmission stop command 14 for the wireless device 5, and the wireless control unit 22 of the control device 7 generates a transmission start command 15 for the wireless device 8.

  In FIG. 3-6, the wireless device 5 that has received the transmission stop command 14 stops the transmission of the B → A information 11 to the wireless base station 1, and the wireless device 8 that has received the transmission start command 15 A state in which transmission of B → A information 11 is started is shown.

  In this way, the wireless device 5 that has received the transmission stop command 14 stops the transmission of the B → A information 11 to the ground control device 16. That is, transmission of the B → A information 11 is continued until the value of the control sequence number N reaches the value of the switching timing sequence number TN, and when the value of the control sequence number N reaches the value of the switching timing sequence number TN, the B → A information 11 is transmitted. Transmission is stopped. Thus, the ground control device 16 can normally receive the B → A information 11 even during the period from when the end exchange is started to when the end exchange is completed.

  Further, since the transmission of the B → A information 11 from the wireless device 8 is started when the value of the control sequence number N reaches the value of the switching timing sequence number TN, B transmitted before the end exchange completion time is started. → The timing of B → A information 11 transmitted after the end exchange completion time can be synchronized with the timing of A information 11.

  In the present embodiment, the configuration example in which the A → B information 12 is normally received by the two wireless devices 5 and 8 has been described. However, in one wireless device (for example, the wireless device 5), A → Even when the B information 12 is normally received, it may be assumed that the other wireless device 8 does not temporarily receive the A → B information 12. For example, when the wireless device 8 receives the A → B information 12 with the control sequence number N of “12”, but does not receive the A → B information 12 with the control sequence numbers N of “13”, “14”, and “15”, The wireless device 8 cannot notify the control device 7 of the control sequence number N after “12”. In this case, the wireless device 8 transmits an error message “cannot be received” to the control device 7 at a constant cycle (for example, the same timing as the generation cycle of the A → B information 12 in the ground control device 16). This error message is regarded as the control sequence number N, and the value of the control sequence number N “12” immediately before receiving the error message is incremented by 1 every time an error message is received. And you may comprise so that the transmission start instruction | command 15 may be produced | generated at the timing when the value reaches the value of the switching timing serial number TN.

  The same applies to the case where the control device 6 does not receive the A → B information 12 temporarily. For example, the wireless device 5 receives the A → B information 12 with the control sequence number N being “12”, but the control sequence number N If the A → B information 12 of “13”, “14”, “15” is not received, the wireless device 5 cannot notify the control device 7 of the control sequence number N after “12”. In this case, the wireless device 5 transmits an error message “cannot be received” to the control device 6 at a fixed period. The control device 6 regards this error message as the control sequence number N, and performs control immediately before receiving the error message. The value of the serial number N “12” is incremented by 1 every time an error message is received. And you may comprise so that the transmission stop command 14 may be produced | generated at the timing when the value reaches the value of the switching timing serial number TN.

  Further, in the train radio system according to the present embodiment, the configuration example in which the switching timing sequence number TN is transmitted to one lead-in line 2 has been described. When no information is received in the first-system lead-in line 2 for a certain period of time, an abnormality in the lead-in line 2 is detected, and the control device 7 is switched to the other control device 7 through the second-line lead-in line 2 where no abnormality has occurred. You may comprise so that timing sequence number TN may be transmitted. With this configuration, since the switching timing sequence number TN can be transmitted reliably, the reliability can be improved.

  As described above, the train radio system according to the present embodiment is connected to the ground control device 16 that generates the train control information (A → B information 12) for controlling the traveling of the train, and the A → A plurality of wireless devices 5 and 8 that perform wireless communication between the wireless base station 1 that receives and wirelessly transmits the B information 12 and the wireless base station 1 mounted on the train 100, and the wireless devices 5 and 8. And the control devices 6 and 7 that control the travel of the train 100 based on the A → B information 12. The ground control device 16 is counted up every time the A → B information 12 is generated. The first serial number (control serial number N) is assigned to the A → B information 12 and transmitted to the train 100, and the first on-vehicle wireless device (B → A information 11) that is transmitting information to the ground control device 1 ( First on-board control device (control device 6) connected to radio device 5) When the timing at which the cab replacement is completed is detected based on the position information 13 selected by the cab selection switches 9 and 10, a predetermined value (for example, the control sequence number N received after the cab replacement is completed) A second on-vehicle wireless device that generates a second sequence number (switching timing sequence number TN) to which the transmission delay time α) is added, and has not transmitted the B → A information 11 to the ground control device 1 based on this switching timing sequence number TN. When the value of the control sequence number N reaches the value of the switching timing sequence number TN, the control device 6 transmits to the second on-vehicle control device (control device 7) connected to the (wireless device 8). A command (transmission stop command 14) for stopping transmission of information to the wireless device 5 is output to the wireless device 5, and the control device 7 sends a command (transmission start command 15) for starting transmission of information to the ground control device 1 to the wireless device 8. Configured to output to Has been. With this configuration, when the end exchange is completed, the transmission of the B → A information 11 from the wireless device 5 is stopped simultaneously with the start of the transmission of the B → A information 11 by the wireless device 8, and the B → A information before the end exchange. The transmission timing of the B → A information 11 after end exchange can be synchronized with the transmission timing of 11. As a result, it is possible to realize smooth train operation that can avoid erroneous detection of abnormal radio communication during end exchange.

  The wireless device 5 that is transmitting the B → A information 11 to the ground control device 16 stops the transmission of the B → A information 11 to the ground control device 16 when receiving the transmission stop command 14 from the control device 6. As described above, the ground control device 16 can receive the B → A information 11 until the end exchange is completed.

  The wireless device 8 that has not transmitted the B → A information 11 to the ground control device 16 starts transmitting the B → A information 11 to the ground control device 16 when receiving the transmission start command 15 from the control device 7. Thus, the transmission timing of B → A information 11 transmitted from the wireless device 8 can be synchronized with the transmission timing of B → A information 11 transmitted from the wireless device 5.

  In addition, the train radio system according to the embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and in a range not departing from the gist of the present invention, Of course, it is possible to change the configuration such as omitting a part.

  As described above, the present invention is applicable to train radio systems, and is particularly useful as an invention capable of avoiding erroneous detection of radio communication abnormality during end replacement.

  1 radio base station, 2 lead-through lines, 3 transmission lines, 4 tracks, 5 on-board radio equipment, 6,7 on-board control equipment, 8 on-board radio equipment, 9,10 cab selection switch, 11 B → A information , 12 A → B information, 13 position information, 14 transmission stop command, 15 transmission start command, 16 ground control device, 20 speed control unit, 21 switching timing sequence number generation unit, 100 train, A, B leading vehicle, C intermediate vehicle , N Control sequence number, TN switching timing sequence number.

Claims (6)

A ground control device that generates train control information for controlling train travel, a radio base station that is connected to the ground control device and receives and transmits the train control information, and a radio base station mounted on a train Train radio system comprising: a plurality of on-board radio devices that perform wireless communication between each other; and a plurality of on-board control devices that are connected to each on-board radio device and control the travel of the train based on the train control information Because
The ground control device gives the train control information a first serial number that is counted up every time the train control information is generated, and transmits the train control information to the train.
The first onboard control device connected to the first onboard wireless device that is transmitting information to the ground control device has completed cab replacement based on the position information selected by the cab selection switch A second on-vehicle radio that generates a second serial number obtained by adding a predetermined value to the first serial number received at the timing of detecting the second serial number, and has not transmitted information to the ground control device. To the second on-vehicle controller connected to the device,
When the value of the first serial number reaches the value of the second serial number, the first on-board control device issues a command to stop transmission of information to the ground control device. The train radio system, wherein the second on-board controller outputs to the second on-board radio device a command for starting transmission of information to the ground control device.   2. The train radio system according to claim 1, wherein the first on-board radio device stops transmission of information to the ground control device when receiving a command to stop transmission of the information.   3. The train radio according to claim 1, wherein the second on-board radio device starts transmission of information to the ground control device when receiving a command to start transmission of the information. 4. system. The first on-board control device and the second on-board control device include a first lead line disposed between a plurality of vehicles constituting the train, and the first lead line. Connected to the second lead-through line forming the redundant system,
When the first on-board controller detects an abnormality of the first lead-through line, the first on-board controller transmits the second serial number to the second on-board controller via the second lead-through line. The train radio system according to any one of claims 1 to 3, wherein When the second on-board radio device cannot receive the train control information, the second on-board radio device transmits an error message to the second on-board control device at a constant cycle,
The second on-board controller increments the value of the first serial number immediately before receiving the error message by 1 every time an error message is received, and the value reaches the value of the second serial number. The train radio system according to any one of claims 1 to 4, wherein a command to start transmission of information to the ground control device is output. When the first on-board radio device cannot receive the train control information, the first on-board radio device transmits an error message to the first on-board control device at a constant cycle,
The first on-board controller increments the value of the first serial number immediately before receiving the error message by 1 every time an error message is received, and the value reaches the value of the second serial number. The train radio system according to any one of claims 1 to 5, wherein a command for stopping transmission of information to the ground control device is output.

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