JP2013136353A - Train position information calculation device and railway system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a train position information calculation device capable of reducing costs for on-rail position detection of a train.SOLUTION: The train position information calculation device is an on-train device 2 installed in the train constituting a railway system together with a ground device 1 for controlling a block signal by collecting information about the on-rail position of each train. The train position information calculation device includes: a position information calculation part 23 for calculating positional information indicating the on-rail position of own train by using a radio wave for positioning radiated from a satellite; an own train position determination part 24 for determining whether the on-rail position is included in a fixed range prescribed in advance; and a positional information notification part 22 for notifying the ground device 1 of the positional information.

Description

  The present invention relates to a train position information calculation device that detects the position of a train line in a railway system.

  In the railway system, for the purpose of preventing collision between trains, the position where each train is located on the track is constantly monitored, and the trains are managed so as not to approach too much. In general, the track is divided into a plurality of blocked sections and managed so that a plurality of trains do not exist in one blocked section so that the distance between the preceding train and the following train is maintained. Each train is normally notified of the positional relationship with the preceding train using a block signal installed on the side of the track. The on-line position of a train is specified using a track circuit (for example, refer patent document 1).

JP 2009-67093 A

  As described above, in the conventional railway system, the track position is detected using a track circuit. However, the position detection using the track circuit increases the installation cost due to the large equipment, and the maintenance cost also increases because the inspection train must be actually run and regularly inspected. . The track circuit is also required for local routes with one or two trains per hour, and such local routes require the same inspection as other routes, but they are small and large in number of users. It is not preferable to use facilities similar to urban routes where there are many passengers, even though profits are not expected, as this will increase the deficit. On the other hand, even in urban areas, cost reduction is very important.

  This invention is made in view of the above, Comprising: It aims at obtaining the train position information calculation apparatus and railway system which can reduce the cost concerning the on-line position detection of a train.

  In order to solve the above-described problems and achieve the object, the present invention provides a train installed in a train that constitutes a railway system together with a ground device that collects information on the position of each train and controls a blocking signal. A position information calculation device, a position information calculation unit for calculating position information indicating the position of the current line of the own train using a positioning radio wave radiated from a satellite, and a predetermined range in which the position of the current position is defined in advance A local train position determination unit that determines whether or not the position information is included, and a position information notification unit that notifies the ground device of the position information when the existing line position is included in the predetermined range, It is characterized by providing.

  According to the present invention, there is no need for a track circuit that is used by the conventional railway system for detecting the on-line position of the train, and it is possible to realize the on-line position detection of the train at a low cost. In addition, there is an effect that the operation cost of the on-line position detection facility can be reduced.

FIG. 1 is a schematic configuration diagram of a railway system according to the present invention. FIG. 2 is a diagram illustrating a configuration example of a main part of the railway system. FIG. 3 is a flowchart showing an example of the operation of the on-board device.

  Hereinafter, embodiments of a train position information calculation device and a railway 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.
<Explanation of system configuration and operation overview>
FIG. 1 is a schematic configuration diagram of a railway system according to the present invention. In the present embodiment, as in a general railway system, a track 100 on which a train travels, a traffic signal 200 that is a closed traffic signal installed at a position (such as the side of the rail) that is easily visible to the train driver, and a traffic signal A railway system including a ground device (illustration is omitted) for controlling various facilities including 200 (equipment necessary for operating a train, such as a rolling mill not shown) is assumed. However, track circuits shall be installed only in sections where there is a high possibility that the distance between trains on the track will be below a certain value, such as when the train stops or runs at low speed, such as in the vicinity of the station. . That is, in a section where the distance between trains is sufficiently long and the risk of collision is low, the position of the train is detected without using the track circuit, and the traffic light 200 and the like are controlled. The on-line position of each train in the ground device is determined by each train using a GPS (Global Positioning System) satellite 300 (only one is shown in FIG. 1 for simplification). Based on the positioning results.

  FIG. 2 is a diagram illustrating a configuration example of a main part of the railway system. The railway system of the present embodiment includes a ground device 1 installed on the ground and an on-vehicle device 2 installed on each train.

  The ground device 1 detects the position of the current train, and controls the traffic signal 200 shown in FIG. 1, for example, and detects the current position of the train without using the track circuit. As a configuration for controlling 200, an information transmission / reception unit 11, an information management unit 12, and a signal control unit 13 are provided.

  The on-board device 2 that is a train position information calculation device is installed in, for example, the head vehicle of a train, receives radio waves from the GPS satellite 300 shown in FIG. 1, and is the own device (the train on which the own device is installed). While positioning, the position information indicating the positioning result is notified to the ground device 1 as necessary. Although the structure which notifies the positional information which shows the result to the ground apparatus 1 every time positioning is also considered, in order to prevent the communication traffic from increasing more than necessary and reduce the processing load of the ground apparatus 1, The on-board device 2 of the present embodiment performs notification only when the ground device 1 needs position information. The on-board device 2 includes an information transmission / reception unit 21, a position information notification unit 22, a position information calculation unit 23, and a host train position determination unit 24.

  In the ground device 1, the information transmission / reception unit 11 performs wireless communication with the on-vehicle device 2 installed in each train, and transmits and receives various types of information. The information management unit 12 holds information acquired from each on-board device 2. In the present embodiment, it is assumed that position information indicating a positioning result by the on-board device 2 is managed. Other information may be managed together. The signal control unit 13 controls the display of the traffic signals that are controlled based on the position information managed by the information management unit 12.

  In the on-board device 2, the information transmission / reception unit 21 performs wireless communication with the ground device 1 to transmit / receive various types of information. The position information notification unit 22 notifies the ground device 1 of position information indicating the calculation result of the position information calculation unit 23 according to the determination result by the own train position determination unit 24. The position information calculation unit 23 measures the position of the own train (train on which the own apparatus is installed) using the GPS system. The own train position determination unit 24 determines whether or not the positioning result (the calculation result of the own train position) by the position information calculation unit 23 indicates a specific position on the track. The position information notification unit 22 is instructed to notify the ground device 1 of the positioning result by the calculation unit 23 as position information.

<Description of characteristic operation>
Hereinafter, in the railway system of the present embodiment, an example of the operation using the on-line position detection of the train and the on-line position detection result performed using the ground device 1 and the on-board device 2 illustrated in FIG. 2 will be described in detail. .

  In the railway system of the present embodiment, the on-board device 2 installed in each train repeatedly executes a process of calculating the position of the own train using a GPS system at a predetermined timing and indicates position information indicating the calculation result And whether or not the position information needs to be transmitted to the ground device 1 is determined. When it is necessary to notify, the ground device 1 is notified.

  FIG. 3 is a flowchart showing an example of the operation of the on-board device 2. As shown in FIG. 3, when the onboard device 2 starts to operate, the on-board device 2 monitors whether or not a predetermined time has elapsed (step S11), and if the predetermined time has elapsed (step S11: Yes), Position information (for example, latitude and longitude indicating the position of the own train) is calculated by receiving the emitted positioning radio wave (step S12). The position information calculation unit 23 monitors whether or not a predetermined time has elapsed and calculates position information (positioning using a GPS system). Any known method may be used for positioning using the GPS system.

  If the position information is calculated, it is next determined whether the calculated position information needs to be transmitted to the ground device 1 (step S13). If the position information needs to be transmitted (step S13: Yes), the position information is determined. Is transmitted to the ground device 1 (step S14). When it is not necessary to transmit (step S13: No), the process returns to step S11, and the monitoring as to whether or not a predetermined time has elapsed is executed again. Hereinafter, the processes of steps S11 to S14 described above are repeated. Whether the position information calculated in step S12 needs to be transmitted to the ground device 1 is determined by the own train position determination unit 24, and the position information notification unit 22 transmits the position information to the ground device 1. The position information notification unit 22 transmits the position information together with the train identification information (for example, the train number).

  The predetermined time in step S11 may be variable according to the speed of the own train. That is, during high speed traveling, the value of the predetermined time is reduced to increase the execution frequency of the position information calculation process, while during low speed traveling, the value is increased to decrease the execution frequency of the position information calculation process. While the vehicle is stopped, the position information calculation operation may be completely stopped. Thereby, while improving the position detection accuracy at the time of high-speed driving | running | working, it can prevent performing position information calculation more than necessary, and can suppress the amount of calculations.

  Here, the operation | movement of the own train position determination part 24, ie, the operation | movement which judges whether position information needs to be transmitted to the ground apparatus 1, is demonstrated.

  The own train position determination unit 24 stores, for example, the position (latitude and longitude) of each traffic signal installed on the track in a database, and receives the position information calculated by the position information calculation unit 23. The received position information (latitude and longitude) is compared with the stored position of each traffic signal. If the position information indicates the vicinity of the traffic signal (the train is traveling in the vicinity of the traffic signal), It is determined that the position information needs to be transmitted to the ground device 1. That is, when the latitude and longitude indicated by the position information are included in a certain range including the position of any one of the traffic lights, it is determined that the position information needs to be transmitted to the ground device 1. For example, the distance from the position of the own train indicated by the position information to the traffic signal is calculated, and when the distance to the traffic signal is a predetermined value or less, it is determined that the transmission of the position information is necessary. The predetermined value may be fixedly used as a predetermined value, but it depends on the speed and location of the train (city or suburb), timetable (number of trains per hour), etc. May be changed as appropriate. For example, a larger value is used in a section where the number of trains is high, such as during high-speed traveling or in the city center, and a small value is used in a section where the number of trains is small, such as during low-speed traveling or in the suburbs.

  The own train position determination unit 24 stores not only the position of the traffic signal but also the intermediate point of two adjacent traffic signals or the latitude and longitude of the predetermined position together as a database, and travels in the vicinity of the traffic signal. In addition to the above, it may be determined that it is necessary to transmit the position information to the ground device 1 even when the vehicle is traveling near an intermediate point or a predetermined position. When it is determined that the position information needs to be transmitted to the ground device 1 even when traveling in the vicinity of an intermediate point or a predetermined position, the existing line position detection accuracy in the ground device 1 can be improved.

  When the ground device 1 receives the notification of the position information from the on-vehicle device 2, the information management unit 12 manages the received position information. The information management unit 12 does not manage the received position information (latitude and longitude indicating the on-line position of the train) as it is, but converts it into information indicating a section where the train is running (for example, a blocked section) and manages the information. It may be.

  In addition, the signal control unit 13 of the ground device 1 controls the block signal based on the position information managed by the information management unit 12. In order to simplify the description, only the signal control unit 13 is illustrated as a component that uses the position information, but other devices and systems that require information on the position of the train on-line are required to obtain the position information. You may make it use. For example, it may be used in a train operation management system.

<Supplementary explanation of information transmitted from onboard device to ground device>
In the above description, the on-board device 2 transmits the latitude and longitude information as position information to the ground device 1 together with the train identification information. However, information transmission from the on-board device 2 to the ground device 1 is performed by wireless communication, and since it is assumed that a large number of on-board devices 2 exist in the system, the information is transmitted to the ground device 1 by radio. It is advisable not to add more information than necessary. In consideration of such circumstances, for the purpose of reducing the amount of information transmitted wirelessly, the information transmitted from the on-board device 2 to the ground device 1 may be as follows.

  That is, since the ground device 1 knows the position of each traffic signal installed on the track, the position information notification unit 22 of the on-board device 2 replaces the current position (latitude and longitude) of the own train, You may make it transmit the identification information of the traffic signal nearest to the own train as positional information. In addition, the position information notification unit 22 may transmit information indicating a blocked section in which the own train is traveling as position information.

  In the above description, the train identification information is transmitted together with the position information. However, when the position information is used only for the control of the traffic light, it is only necessary to know whether the train exists in the blocked section. The identification information of the train that exists in is not essential information. Therefore, the on-board device 2 may omit (not transmit) the train identification information when the position information is used only for controlling the traffic light. Also, if the ground device 1 holds the route information of the route, the train number of the train that is on the route can be derived from the diagram information as long as the on-line position is known. It may be omitted.

  In addition, if the ground device 1 holds the schedule information of the route and the schedule is not disturbed, the on-board device 2 transmits only the train number of the own train, and the ground device 1 It is also possible to configure so that the on-line position of each train is detected based on the position (position information) where the train number, timetable, and traffic signal notified from the train are installed.

  As described above, since there are a plurality of types and combinations of information wirelessly transmitted from the onboard device 2 to the ground device 1, the information to be wirelessly transmitted is considered to have the smallest amount of information depending on the system configuration and the like. And decide.

  In the present embodiment, positioning is performed using GPS, but a satellite positioning system other than GPS may be used.

  In addition, instead of performing location detection using GPS in all tracks and sections, location detection using GPS is performed only in some sections such as in the suburbs, and in the remaining sections using existing track circuits. Position detection may be performed.

  As described above, in the railway system of the present embodiment, the on-board device (train position information calculation device) of each train executes a process of calculating the position information of the own train using GPS or the like at a predetermined timing. When the vehicle is traveling in the vicinity of the obstruction signal set at the boundary of the obstruction section or in the vicinity of a predetermined position defined in advance, the calculated position information is transmitted to the ground device. In addition, the ground device controls the blocking signal based on the position information acquired from the on-board device installed in each train. As a result, the track circuit necessary for detecting the on-line position of the train can be omitted, so that the equipment can be simplified and the cost can be reduced. In addition, the maintenance and inspection of the track circuit that is performed by actually running the inspection vehicle is unnecessary, and the operation cost can be reduced.

  As described above, the train position information calculation apparatus according to the present invention is useful when detecting the on-line position of a train without using a track circuit.

DESCRIPTION OF SYMBOLS 1 Ground apparatus 2 On-board apparatus 11, 21 Information transmission / reception part 12 Information management part 13 Signal control part 22 Position information notification part 23 Position information calculation part 24 Own train position determination part 100 Track 200 Signal apparatus 300 GPS satellite

Claims (6)

A train position information calculation device installed in a train, which constitutes a railway system together with a ground device that collects information on the position of each train and controls a blocking signal,
A position information calculation unit that calculates position information indicating the position of the current train using a positioning radio wave radiated from a satellite;
A local train position determination unit that determines whether the existing line position is included in a predetermined range that is defined in advance;
A position information notification unit for notifying the position information to the ground device when the standing line position is included in the predetermined range;
A train position information calculation device comprising:   The train position information calculation apparatus according to claim 1, wherein the predetermined range is a predetermined range around a block signal set on a route on which the own train is traveling.   The train position information calculation device according to claim 1 or 2, wherein the position information calculation unit periodically calculates position information at a variable period according to the speed of the own train.   The train position information calculation apparatus according to claim 1, wherein the predetermined range is variable according to a speed of the own train. A railway system comprising an on-board device installed in a train, and a ground device that collects information on the position of each train and controls a blocking signal,
The on-board device is:
A position information calculation unit that calculates position information indicating the position of the current train using a positioning radio wave radiated from a satellite;
A local train position determination unit that determines whether the existing line position is included in a predetermined range that is defined in advance;
A position information notification unit for notifying the position information to the ground device when the standing line position is included in the predetermined range;
A railway system characterized by comprising:   The railway system according to claim 5, wherein the ground device performs operation management of a train using position information collected from the on-board device.

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