JP2014144664A - Signal security system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a signal security system that achieves a safe train service by preventing between-stations running permission information, permitting only running of one train, from being accidentally duplicated due to a communication failure and the like.SOLUTION: When between-stations running permission information is electronically transmitted/received between a ground device of a station and an on-vehicle device of a train or between the ground devices of the stations, a plurality of communications are performed in a phased manner. Additionally, a different piece of identification information is added to the running permission information each time transmission is performed on the side of a transmission device. Furthermore, the running permission information is split into two or more pieces by the transmission-side device, and the split pieces of running permission information are combined together on the side of a receiving device to be turned into effective running permission information.

Description

  The present invention relates to a signal security system that can travel safely without causing a train to collide.

  In order to avoid the collision of trains and to ensure the safety of train traveling, it is necessary to detect the position of the train and control each train so that the trains do not collide with each other. Therefore, a device for detecting the position of the train and a device for controlling the train are required. However, in a line section where the number of trains to be operated is small, the initial cost and maintenance cost of the above-mentioned device become problems, and it is difficult to introduce a large-scale device.

  Also, on routes with little demand, there is no need to shorten the train operation interval, so safety is often ensured by the idea of one block between stations where only one train runs between one station.

  As a method for realizing one block between stations, there are methods that have been used for a long time, such as a staff block type and a tablet block type. These systems use a permit for traveling between stations, called slips. Both the staff closing type and tablet closing type are configured so that there is only one ticket between each station at the same time. By allowing only trains that have a ticket to travel between stations, one station can be closed. Realized.

  For example, Patent Document 1 discloses a system that digitizes a slip. In Patent Document 1, a unique slip between stations is created as electronic data. When a train departs, a vote is sent wirelessly to the train from the ground device installed at the departure station, and after transmission, the ground device at both the departure station and the station to which the train goes is locked. The vote will not be sent until it is canceled.

  When the train departs and arrives at the arrival station, it is sent to the ground device of the station where the ticket arrived, and the vote is confirmed by the ground device, and if it matches, the station where the train departed and the station where the train arrived Both ground devices can be unlocked and the vote can be sent to the train again. Thus, by locking and canceling the transmission of the ticket, the train that travels with the ticket between stations is limited to one train, and one blockade between stations is realized to ensure safety.

Japanese Patent Publication No.2-6268

  In the staff closing type and tablet closing type, voting is a physical thing, and station staff and drivers need to handle it at the station. In addition, there is a possibility that a human error occurs such that the driver starts a train that has not received a vote.

  By digitizing the slips, the work of the driver and station staff can be reduced and human errors of the driver and station staff can be prevented. However, if a communication failure or the like occurs when sending and receiving a ticket, the ticket may be duplicated, and if it is duplicated, a plurality of different trains hold the ticket and there is a risk of collision.

  An object of the present invention is to provide a signal security system that prevents an electronic ticket from being erroneously duplicated due to a communication failure or the like and realizes safe train operation.

  In the present invention, in order to solve the above-mentioned problem, in a signal security system between stations that prohibits traveling of two or more trains in order to prevent a collision of trains, information that gives permission to travel between the stations is provided. When transmitting and receiving electronically between a station ground device and an on-board device or between station ground devices, the divided travel permission information is transmitted stepwise by a plurality of communications. Also, different pieces of identification information are added to the travel permission information every time transmission is performed on the transmission device side. Further, the travel permission information may be divided into two or more by the transmission side device, and the travel permission information divided by the reception device side may be combined to be effective travel permission information.

  It is possible to prevent a plurality of pieces of information giving permission to travel between stations from being simultaneously present, and to realize safe train operation. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

FIG. 1 is a conceptual diagram of a mechanism of a basic signal security system using a slip in the first embodiment. FIG. 2 is a sequence diagram illustrating a flow of processing for sending and receiving slips in the first embodiment. FIG. 3 is a conceptual diagram illustrating a situation in which reissuance of a slip is necessary in the second embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

  The present invention allows a train to travel safely without having multiple pieces of information that give permission to travel between stations at the same time between stations that prohibit the traveling of two or more trains in order to prevent a collision of the trains. This is achieved with a simple system configuration.

  First, Fig. 1 shows the basic structure of a signal security system using slips.

  In FIG. 1, there are a plurality of electronic slips 101 indicating permission for traveling between the A station and the B station because the processing flow of the entire system is shown, but only one actually exists. Without being on the on-board device 106 of the train 102, the ground device 103a at the A station, or the ground device 103b at the B station, a plurality of them are not present at the same time. In the following description, the ground device 103a at the A station and the ground device 103b at the B station may be collectively referred to as the ground device 103.

  First, the flow of processing when the ground device 103a at the A station has the slip 101 and the train 102 leaves the A station and heads for the B station will be described.

  The on-board device 106 of the train 102 located at the station A transmits a departure permission request for departure to the station B via the station train transmission device 105 to the ground device 103a of the station A. The station train transmission device 105 is a device that enables transmission and reception of information between the ground device 103a and the on-board device 106, and only needs to be able to communicate only within a limited range of a short distance. Various devices such as a transponder, a varistor, and a general-purpose radio can be used. An apparatus can be used, and the station train transmission apparatus 105 is not specified in the present invention.

  When the ground device 103 a at the station A that has received the departure permission request from the on-board device 106 of the train 102 has the ticket 101, the on-board device of the train 102 is received via the station train transmission device 105. 106, and deletes the slip 101 in the ground device 103a at the station A.

  When the ground device 103a at the station A does not have the slip 101, the ground device 103b at the station B is requested for the slip 101 via the inter-station transmission line 104. If the ground device 103b of the B station having received the request has the slip 101, the slip 101 is transmitted to the ground device 103a of the A station via the inter-station transmission line 104, and is in the ground device 103b of the B station. The slip 101 is deleted.

  Since the inter-station transmission line 104 only needs to be able to transmit and receive the slip 101, it can operate with a small communication capacity. Various transmission lines such as a wireless line, a telephone line, an ISDN (registered trademark) dedicated line, an Ethernet (registered trademark), and the like are applicable, and the inter-station transmission line 104 is not specified in the present invention.

  Upon receiving the slip 101 from the ground device 103b at the B station, the ground device 103a at the A station transmits the slip 101 to the on-board device 106 via the station train transmission device 105 and was in the ground device 103a at the A station. The slip 101 is deleted.

  If both the ground device 103a at the A station and the ground device 103b at the B station do not have the slip 101, it means that there is a train running with the slip 101 between the A station and the B station. There are no trains from either station A or station B. When the ground device 103a receives the slip 101 from another train arriving at the A station from the B station or the ground device 103b, the ground device 103a transmits the slip 101 to the on-board device 106.

  The on-board device 106 of the train 102 receives the vote 101 from the ground device 103a. The on-board device 106 outputs a brake so that the station A cannot be departed until the slip 101 is received. The on-board device 106 releases the brake and releases it so that the station A can be started when the slip 101 is received.

  When the train 102 arrives at the station B, the on-board device 106 transmits the slip 101 that it has to the ground device 103b via the station train transmission device 105, and the on-board device 106 deletes the slip 101 that it had.

  The ground device 103b at station B that has received the slip 101 from the on-board device 106 holds the slip 101. At this time, the slip 101 is held only by the ground device 103b at station B, and is not held by other ground devices or trains.

  As for the control of the station switch, no control is required if a rolling switch is used. Alternatively, it is possible to safely control the turning machine by installing an interlocking device, performing conversion and locking of the turning machine, and transmitting the slip 101 to the on-board device 106 after securing the course.

  By configuring the signal security system as described above, only the train 102 having a single slip 101 can travel between the A station and the B station, and only one train exists between the stations. Therefore, it is possible to realize one blockage between stations and to allow the train 102 to travel safely.

  Next, Embodiment 1 of the present invention will be described with reference to FIGS.

  FIG. 2 is a sequence diagram for sending and receiving slips in this embodiment. FIG. 2 assumes a case where the slip 101 is transmitted from the ground device 103 a to the on-board device 106. First, the slip is divided so that the function as a slip is not established individually, and a serial number (hereinafter referred to as a serial number) is attached to form a slip 221a and a slip 221b. In this example, a case where the slip 101 is divided into two slips 221a and 221b will be described. The number of divisions of the slip 101 may be three or more instead of two.

  In addition, combinations with different serial numbers are prevented from functioning as a ticket. For example, if the content of the ticket 101 is “AAABBBB” and the serial number is “01”, for example, the divided ticket 221a is “AAA01”, the ticket 221b is “BBB01”, and the ticket 221a and the ticket 221b having the same serial number are combined. This is the first valid ticket. Conversely, if the divided slip 221a is “AAA01” and the slip 221b is “BBB02”, the combined slip 221a and the slip 221b are not effective.

(1) Communication 1: 201 (transmission and receipt confirmation of slip 221a)
(1-1) Time series 211:
In the first stage (first time) communication 201, at time point 211, the ground device 103a at the station A sends a ticket 221a having the content "AAA01" among the divided tickets to the train 102 via the station train transmission device 105. To the on-board device 106. Of the divided slips, “AAA01” may be further divided and re-divided into “AAA” and “01” for transmission.

(1-2) Time series 212:
When the on-board device 106 receives the ticket 221a at the time point 212 of the first stage communication 201, the on-board device 106 transmits a reception response of the ticket 221a to the ground device 103a via the station train transmission device 105. The ground device 103a continues to transmit the slip 221a until a reception response of the slip 221a is received from the on-board device 106.

  Even if a temporary communication failure or the like occurs and the slip 221a cannot be received, the on-board device 106 receives the slip 221a by continuing to transmit the slip 221a until the ground device 103a receives a response to the slip 221a. Can be performed reliably.

(1-3) Time series 213:
When the ground device 103a receives the reception response of the ticket 221a from the on-board device 106 via the station train transmission device 105 at the time point 213 of the first stage communication 201, the ground device 103a stops and holds the transmission of the ticket 221a. The current slip 221a is deleted and only the slip 221b is held. The on-board device 106 continues to transmit the reception response of the slip 221a until the slip 221b is received from the ground device 103a.

  Even if a temporary communication failure or the like occurs and the reception response of the slip 221a cannot be received, the on-board device 106 continues to transmit the reception response of the slip 221a until the next slip 221b is received, whereby the ground device 103a Can reliably receive the reception response of the slip 221a.

  In addition, for managing the transmission history of the slip, the retained slip 221a may be deleted and retained by adding information indicating “invalid” to the divided slips.

  Through the first-stage (first-time) communication 201 described above, the slip 221 a having the content “AAA01” can be reliably moved from the ground device 103 a at the station A to the on-board device 106 of the train 102. Therefore, only the on-board device 106 of the train 102 holds the ticket 221a, and the on-board device of another train or the ground device of the station can be prevented from holding the same ticket 221a.

(2) Communication 2: 202 (transmission and receipt confirmation of slip 221b)
(2-1) Time series 214:
In the second stage (second time) communication 202, at the time point 214, the ground device 103a at the station A transmits the ticket 221b having the content “BBB01” among the divided tickets to the train 102 via the station train transmission device 105. To the on-board device 106.

(2-2) Time series 215:
When the on-board device 106 receives the ticket 221b at the time series 215 of the second stage communication 202, the on-board device 106 transmits a reception response of the ticket 221b to the ground device 103a via the station train transmission device 105. The ground device 103a continues to transmit the slip 221b until a reception response for the slip 221b is received from the on-board device 106.

  By continuing to transmit the slip 221b until the ground device 103a receives a response to receive the slip 221b, the ground device 103a can reliably confirm the completion of the reception of the slip 221b in the on-board device 106.

(2-3) Time series 216:
When the ground device 103a receives the reception response of the slip 221b from the on-board device 106 at the time point 216 of the second stage communication 202, the ground device 103a stops sending the slip 221b and deletes the retained slip 221b. The on-board device 106 continues to transmit the reception response of the slip 221b until it departs.

  Through the second-stage (second-time) communication 202 described above, the slip 221b having the content “BBB01” can be reliably moved from the ground device 103a at the station A to the on-board device 106 of the train 102. Therefore, only the on-board device 106 of the train 102 holds the ticket 221b, and the on-board device of another train or the ground device of the station can be prevented from holding the same ticket 221b.

  In the on-board device 106 of the train 102, a divided slip 221a having the content “AAA01” and a slip 221b having the content “BBB01” are arranged. By synthesizing the slips having the same serial number “01”, the train 102 can obtain a slip 101 “AAABBBB01” that allows passage from the A station to the B station.

  By implementing the above functions and processing in the train on-board device and the station ground device, a combination of the slip 221a and the slip 221b having a function as a slip regardless of the time series communication failure or the like, It is not possible to exist at the same time on the train, and it is possible to send and receive the votes safely. The same applies to the transmission / reception of a ticket from the train to the ground device and the transmission / reception of a ticket between ground devices at different stations.

  It is also possible to ensure the safety of train travel by transmitting and receiving the encrypted slip information and key information for decrypting the encrypted slip information step by step. Alternatively, the divided slips may be transmitted by reducing the amount of data transmitted by compression or the like, and the compressed slips are transmitted and received, and the split slips are acquired. In addition, the above-mentioned communication status, the status of the divided slip movement, the transmission / reception status of the reception response, the history of issuing the slip, etc. are displayed on a display device (not shown) such as the ground device 103 or the on-board device 106 to secure the signal. The system status may be grasped, or may be stored and managed as maintenance data in a storage device (not shown).

  In addition, before the ground apparatus 103a deletes the ticket 221b, the train 102 can obtain the ticket 101 in which the ticket 221a and the ticket 221b are combined. Therefore, there is a possibility that the train 102 will leave while the ground device 103a holds the slip 221b.

  Therefore, in the present invention, the serial number is updated from “01” to “02”, for example, every time the station ground device 103 completes the transmission of the slip. Thus, when the on-board device 106 of the train 102 receives the next ticket, the ticket with the updated serial number (for example, “AAABBB02)” is received, so the ticket is not duplicated and there is no safety problem. .

  There may be a possibility that there are a plurality of tickets having different serial numbers. In that case, the serial numbers are compared, the ticket having a new serial number is validated, and the old regular serial number is deleted.

  Next, Embodiment 2 of the present invention will be described with reference to FIG.

  FIG. 3 is a conceptual diagram illustrating a situation in which reissuance of a slip is necessary in the second embodiment.

  As shown in FIG. 3, there is a situation in which the train A301 at the A station fails and cannot be departed, and there is a case where the train B302 at the B station is desired to depart to the A station. In this case, it is necessary to reissue the slip 101, but if the communication 201 is not completed, a slip in which the serial number assigned to the slip 101 is updated from “01” to “02” is issued. Use valid votes. Therefore, even if the train A301 at the station A receives one of the divided tickets having the serial number “01”, the ticket having the same serial number “01” is not duplicated and there is no safety problem.

  Further, as described above, the slip of the serial number “02” is transmitted step by step from the ground device 103a at the A station to the ground device 103b at the B station and from the ground device 103b at the B station to the train B302. Thereby, the train B302 in the B station can be departed to the A station.

  As described above, by implementing the communication processing for dividing the slips and transmitting the divided slips in stages, the train can be safely run even if the slips are digitized.

In addition, this invention is not limited to an above-described Example, Various modifications are included.
The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor.

  Information such as programs, tables, and files for realizing each function may be stored in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.

  Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

101 Ticket 102 Train 103 Ground device 104 Inter-station transmission line 105 Station train transmission device 106 On-board device 201, 202 Communication

Claims (14)

Between stations that prohibit the travel of two or more trains to prevent train collisions,
When electronically transmitting and receiving the travel permission information that gives the travel permission between the stations between the ground device of the station and the on-train device of the train or between the ground devices of the station,
A signal security system, wherein the travel permission information divided into a plurality of parts is transmitted stepwise by a plurality of communications. The signal security system according to claim 1, wherein the travel permission information transmitting side device is:
A signal security system, wherein different identification information is added to the travel permission information every time transmission is performed. The signal security system according to claim 1, wherein the travel permission information is:
It is divided into two or more by the transmission side device of the travel permission information,
The divided travel permission information is synthesized as valid travel permission information again by the receiving side device. The signal security system according to claim 2, wherein the travel permission information is:
It is divided into two or more by the transmission side device of the travel permission information,
The divided travel permission information is synthesized as valid travel permission information again by the receiving side device. The signal security system according to claim 3, wherein the reception-side device is
Each time the divided travel permission information is received, reception response information is transmitted to the transmission side device. 5. The signal security system according to claim 4, wherein the receiving side device is:
Each time the divided travel permission information is received, reception response information is transmitted to the transmission side device. 6. The signal security system according to claim 5, wherein the transmitting side device is:
When the reception response information is received, the signal security system that invalidates the divided travel permission information that has been transmitted. The signal security system according to claim 6, wherein the transmission side device includes:
When the reception response information is received, the signal security system that invalidates the divided travel permission information that has been transmitted. The signal security system according to claim 1, wherein the travel permission information transmitting side device is:
Encrypt the travel permission information,
A signal security system, wherein the encrypted travel permission information and key information for decrypting the encrypted travel permission information are transmitted step by step. The signal security system according to claim 9, wherein the encrypted travel permission information and the key information receiving side device are:
Each time the encrypted travel permission information or the key information is received, reception response information is transmitted to the transmission side device. The signal security system according to claim 10, wherein the transmission side device is:
When the reception response information is received, the signal security system that invalidates the travel permission information that has been transmitted. The signal security system according to claim 1, wherein the travel permission information transmitting side device is:
Compress the travel permission information,
A signal security system, wherein the compressed travel permission information is transmitted step by step. The signal security system according to claim 12, wherein the compressed travel permission information receiving device is:
Each time the compressed travel permission information is received, reception response information is transmitted to the transmission side device. 14. The signal security system according to claim 13, wherein the transmitting side device is:
When the reception response information is received, the signal security system that invalidates the travel permission information that has been transmitted.

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