JP2004009775A - Train position detection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect a detailed position of a train on rails at low cost. <P>SOLUTION: A current position of the train on the rails is detected on the train. An on-train transceiver transmits a signal of the current position, and a ground apparatus receives the signal through a public radio network. A scheduled traveling pattern is stored in a storage area of the on-train apparatus. When the current position of the train is out of a prescribed area including the scheduled traveling pattern, the on-train transceiver transmits the current position signal. If a deviation is in excess of an allowable range, the train position is transmitted more closely than a fixed cycle (t), so that the train position is transmitted to the ground apparatus in real time. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a train position detection system that detects a position of a train on a track, and more particularly to a system in which reduction in facility cost and communication cost is considered.
[0002]
[Prior art]
In a single track section in which tracks between stations are shared by upper and lower lines, a special automatic blockade device having no track circuit between stations is used. This device transmits a signal indicating that a train has entered from one end of a single-track section to the other end so that the train does not enter from both sides of the single-track section, and prohibits entry. It is to let.
[0003]
By the way, even in such a configuration, if the position of the train in the single track section can be detected in detail, it is useful to improve the serviceability and security by using this for passenger guidance and operation management.
[0004]
[Problems to be solved by the invention]
However, if a track circuit is newly provided between the stations, or if the space between the stations is divided into a large number of track sections and the track circuits are provided in each of the sections, the equipment cost increases. In addition, even if the vehicle side detects the position and transmits it to the ground, providing dedicated radio equipment for that purpose would increase the equipment cost. Further, since high-frequency data transmission is required to transmit the current position information of a vehicle traveling at a high speed, communication costs are excessive when using a public wireless service.
[0005]
Therefore, an object of the present invention is to realize detailed position detection of a train at low cost.
[0006]
[Means for Solving the Problems]
According to a first aspect of the present invention, as set forth in claim 1, a position acquisition unit for acquiring a current position of a train on a track on a vehicle, and an on-board transmission unit for transmitting a current position signal from the position acquisition unit. A train control system comprising: a transmission control means for controlling the on-vehicle transmission means; and a terrestrial reception means for receiving a signal from the on-vehicle transmission means via a public wireless communication line. The vehicle further includes on-board storage means for holding scheduled traveling pattern information corresponding to the elapsed time after departure from the point and the position of the train on the track, under the control of the transmission control means, the on-board transmission means, A train position detection system characterized by transmitting a current position signal when a current position of a train is outside a predetermined area based on the planned traveling pattern information.
[0007]
According to the first aspect of the present invention, the position acquisition means detects the current position of the train on the track on the vehicle, and the on-vehicle transmission means transmits the current position signal under the control of the transmission control means, and receives the signal on the ground. The means receives via a public wireless communication line. Here, in the first aspect of the present invention, the on-board storage means holds scheduled traveling pattern information in which the elapsed time after departure from the predetermined point and the position of the train on the track are held, and the current position of the train is stored. Since the on-vehicle transmitting means transmits the current position signal when the vehicle is outside the predetermined area including the planned traveling pattern, the communication cost can be reduced by reducing the frequency of data transmission.
[0008]
According to a second aspect of the present invention, as described in the second aspect, the train position detecting system according to the first aspect, wherein the on-vehicle transmitting means transmits a predetermined check signal when the current position signal is not transmitted. This is a train position detection system characterized by transmitting.
[0009]
According to the second aspect of the present invention, the on-vehicle transmitting unit transmits the predetermined check signal when the current position signal is not transmitted, so that the communication state can be confirmed even when the vehicle is traveling along the scheduled traveling pattern.
[0010]
According to a third aspect of the present invention, as set forth in claim 3, the train position detecting system according to claim 1 or 2, wherein ground transmission means for transmitting predetermined position calibration information from the ground; On-vehicle receiving means for receiving the on-vehicle information, and calibration processing means provided on the vehicle for calibrating the position acquisition means based on the position calibration information, wherein the ground transmitting means includes the on-vehicle transmission means. And transmitting the position calibration information in response to a departure request from the means.
[0011]
According to the third aspect of the present invention, since the ground transmitting means transmits the position calibration information from the ground, the on-vehicle receiving means receives it on the vehicle, and the calibration processing means calibrate the position acquisition means based on the position calibration information. In addition, the position detection error can be reduced. Also, in a normal operation, a stop point of a train at a station is determined, and when a departure request is made, it can be estimated that the train is at a specified stop point. By transmitting the information in response to the departure request from the on-board transmitting unit, the position acquiring unit can be calibrated without using ground equipment such as a ground terminal.
[0012]
According to a fourth aspect of the present invention, as set forth in claim 4, the train position detection system according to any one of claims 1 to 3, wherein the ground transmission means for transmitting the scheduled traveling pattern information from the ground, On-vehicle receiving means for receiving the scheduled traveling pattern information on a vehicle.
[0013]
According to the fourth aspect of the present invention, since the ground transmission means transmits the scheduled traveling pattern information from the ground and the on-board receiving means receives the information on the vehicle, the scheduled traveling pattern information can be managed on the ground side. Information can be updated.
[0014]
According to a fifth aspect of the present invention, there is provided the train position detecting system according to any one of the first to third aspects, wherein the ground transmission means transmits distance information to a next stop point from the ground. And a on-vehicle receiving means for receiving the distance information on a vehicle.
[0015]
According to the fifth aspect of the present invention, since the ground transmitting means transmits the distance information to the next stop point from the ground and the on-vehicle receiving means receives the information on the vehicle, the distance information to the next stop point is managed on the ground side. And distance information can be updated.
[0016]
According to a sixth aspect of the present invention, as set forth in the sixth aspect, the train position detecting system according to any one of the third to fifth aspects, wherein the departure prohibition is canceled on condition that reception from the ground transmission means is performed. This is a train position detection system further including on-vehicle determination means.
[0017]
According to the sixth aspect of the present invention, the onboard determination unit cancels the departure prohibition on condition of reception from the ground transmission unit, so that it is possible to guarantee that the train side has acquired information from the ground transmission unit at the time of departure. .
[0018]
According to a seventh aspect of the present invention, as described in claim 7, the train position detection system according to any one of claims 1 to 6, wherein the track is a single-track section. System.
[0019]
The track circuit is not provided in the single track section in many cases, and the position of the train in the section is often unknown at all.Therefore, the present invention is particularly effective when this is applied to the track in the single track section. it can.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a train position detection system 1 according to a first embodiment of the present invention. The train 10 runs on a track 14. A GPS receiver 11 and an on-vehicle transceiver 12 are installed on the roof of the train 10, and both are connected to an on-board device 13.
[0021]
The GPS receiver 11 is a position acquisition unit according to the present invention, and is configured to receive radio waves from at least three GPS satellites 40 and calculate the latitude and longitude of the current position of the train 10 in accordance with the received radio waves. . The on-vehicle transceiver 12 is configured to perform wireless communication with the ground device 20 through the public wireless network 30. As the public wireless network 30, a commercial packet communication network is preferably used.
[0022]
The on-vehicle device 13 includes a transmission / reception control function and an arithmetic processing function for transmitting the current position signal from the GPS receiver 11 from the on-vehicle transmitter / receiver 12, an elapsed time after departure from a predetermined point of the train 10, and A storage function of storing scheduled traveling pattern information corresponding to the position of the train.
[0023]
The ground device 20 is installed at a train station, receives a signal from the on-board transceiver 12 via the public wireless network 30, and analyzes the received signal to extract current position information of the train 10. And an arithmetic processing function for outputting.
[0024]
Each of the on-board device 13 and the ground device 20 includes a fail-safe microprocessor centered on a CPU in terms of hardware, and details thereof are not shown. , A RAM for temporarily storing data, a communication port, an input / output port, and a hard disk device as an external storage device.
[0025]
In the storage area of the on-board device 13, a scheduled traveling pattern (see FIG. 2) in which the elapsed time after departure from the predetermined point and the position of the train 10 on the track 14 correspond to each other is stored as a data file in a table format, for example. Is held.
[0026]
The storage area of the on-board device 13 stores the current latitude / longitude information obtained by the GPS receiver 11 and the corresponding route distance from the starting point (for example, Station A) in association with each other. -The route distance table is stored as a table format data file.
[0027]
The operation of the first embodiment configured as described above will be described. In the present embodiment, a current position signal is transmitted when the current position deviates significantly from the planned traveling pattern, and a check signal is transmitted in other cases. The data size of this check signal is set small enough to check the communication state.
[0028]
In FIG. 3, first, current position information calculated by the GPS receiver 11 at every predetermined sampling time is read into the on-board device 13 (S1). Next, the current position information is converted into a distance from a starting point (for example, station A) by referring to the above-described position / route distance table (S2).
[0029]
On the other hand, the on-board device 13 refers to the scheduled traveling pattern based on the elapsed time after departure from the station A, and reads a standard distance (route distance from the station A) corresponding to the elapsed time (S3).
[0030]
Next, the read standard distance is compared with the current distance previously obtained by referring to the position / path distance table, and the latter is within a predetermined allowable range set around the former. Is determined (S4).
[0031]
As a result of this determination, when the current distance is out of the allowable range, the distance information (current position information) from the current departure point is predetermined for the train 10 under the control of the on-board transceiver 12. It is transmitted together with the train ID and the current time information (S5). On the other hand, if the result of this determination is that the current distance is within the allowable range, the transmission of the current position information / train ID / current time information is skipped.
[0032]
Further, by referring to a predetermined software timer, it is determined whether or not the elapsed time from the previous transmission of the check signal exceeds a predetermined set interval (S6). It is transmitted under the control of the upper transceiver 12 (S7). This set time is set long enough to check the communication state, for example, one minute.
[0033]
As described above, in the present embodiment, the current position signal is transmitted when the current position deviates significantly from the planned traveling pattern, and in other cases, the check signal is transmitted. That is, as shown in FIG. 4, if the difference between the actual train position and the train position according to the scheduled traveling pattern is within the allowable range, the train position is transmitted at a constant period (t), and as shown in FIG. On the other hand, if the difference exceeds the allowable range, the train position is transmitted more densely (frequently) than the fixed period (t), and the position of the train is transmitted to the ground device 20 in real time.
[0034]
In addition, the current position information, train ID, current time information, or the check signal transmitted from the on-board transceiver 12 is received and analyzed by the ground device 20, and is transferred to an operation management device and a passenger guide device (not shown). The data is stored in a predetermined log database.
[0035]
As described above, in the present embodiment, the current position of the train on the track is detected on the vehicle, the current position signal is transmitted by the on-vehicle transceiver 12, and the ground device 20 transmits the signal to the public wireless network 30. Receive via Here, in the present embodiment, the scheduled traveling pattern is held in the storage area of the on-board device 13, and when the current position of the train is outside the predetermined area including the scheduled traveling pattern, the on-vehicle transmitter / receiver 12 Since the position signal is transmitted, the communication cost can be reduced by reducing the frequency of data transmission.
[0036]
Further, in the present embodiment, the on-vehicle transceiver 12 transmits a predetermined check signal when the current position signal is not transmitted, so that the communication state can be confirmed even when the vehicle is traveling along the scheduled traveling pattern.
[0037]
In the first embodiment, the acquisition or detection of the position information on the vehicle is performed by the GPS receiver 11. However, the acquisition of the position information in the present invention is not limited to the above. Means can be used. For example, as shown in a modified example shown in FIG. 6, a ground member 25 which is a well-known electromagnetic induction type non-power transponder is installed near a track 24, and below the floor of a train 60, An on-board arm 26 configured to receive signals and transmit power waves to the ground arm 25 is provided. Further, a tachogenerator 27 is provided on the wheels of the train 60. The speed information from the tacho generator 27 may be integrated on the basis of the reception time point, and the current position may be acquired by this. The same effect as in the above embodiment can be obtained by such a configuration.
[0038]
Next, a second embodiment will be described. The second embodiment shown in FIG. 5 is a system that uses a train 60 that performs position detection using the tachogenerator 27 as in the above-described modified example. The travel pattern information and the distance information to the next stop point are transmitted to the train 60 for use.
[0039]
In the figure, an A station station device 70 is installed at an A station, and a B station station device 71 is installed at a B station, and both are connected by an inter-station communication cable 72. A single track section 74 is provided between the A station and the B station. On the other hand, the operation management center is provided with an operation management console 76 and a monitor device 77 as center equipment 75, and a router 78 connected to these via a LAN is connected to a router 79 of the public wireless network 30. The A station station device 70, the B station station device 71, the operation management console 76, and the monitor device 77 are all configured by well-known personal computers.
[0040]
In the present embodiment, in response to a departure request from the on-board transceiver 12, the operation management console 76 determines whether a predetermined departure permission condition is satisfied, and outputs a departure permission signal if affirmative. The onboard device 23 releases the departure prohibition on condition that the departure permission signal is received.
[0041]
Specifically, first, when the train 60 departs from the A station, a driver sends a departure request from the on-board transceiver 12 by operating on-board equipment. A train ID unique to the train 60 is automatically attached to this departure request.
[0042]
When the departure request is received by the station A station device 70 as a ground device via the public wireless network 30, the station station device 70 responds by using the train ID as a key based on data stored in advance. A search is performed, and the following information is transmitted to the on-vehicle transceiver 12 using the search result.
Information A: current train position (that is, regular stop position at station A)
Information B: Scheduled traveling pattern information between stations AB. C: Distance to the stop position of station B, which is the next station.
[0043]
When these pieces of information are received by the on-board transceiver 12 and transferred to the on-board device 23, the on-board device 23 performs the following processing.
[0044]
First, using the information A, the tachometer 27 calibrates the integrated distance. That is, the accumulated distance by the tachogenerator 27 is reset assuming that the current train position is the distance 0 point.
[0045]
Secondly, while traveling in the single track section 74, using the information B, the same processing as the processing of FIG. 3 in the first embodiment, that is, whether the current position of the train 60 is within a predetermined area including the scheduled driving pattern. Is determined, and a process of transmitting the current position signal from the on-vehicle transceiver 12 when the vehicle is out of the predetermined distance is executed.
[0046]
Thirdly, the information C is used to determine whether the train 60 has entered the premises of the station B or a short distance, and on the condition that the train 60 has entered the premises or the short distance, a signal to that effect is sent to the on-board transceiver. 12 is transmitted. Note that this signal is received by the B station station device 71 and is reflected in real time on the operation management information of the operation management console 76 of the center equipment 75 and the operation of the monitor device 77.
[0047]
As described above, in the second embodiment, the station A station device 70 as the ground transmitting means transmits the position calibration information from the ground, the on-vehicle transceiver 12 receives the information on the vehicle, and the on-board device 23 Since the integrated distance by the tacho generator 27 is calibrated based on the calibration information, the position detection error can be reduced. Also, in a normal operation, a stop point of a train at a station is determined, and when a departure request is made, it can be estimated that the train is at a specified stop point. By performing the transmission in response to the departure request from the on-vehicle transmission means, it is possible to calibrate the on-vehicle position information without using ground equipment such as a ground terminal.
[0048]
In the second embodiment, the station A station device 70 transmits the scheduled traveling pattern information from the ground, and the on-board transceiver 12 receives the information on the vehicle. Therefore, the scheduled traveling pattern information can be managed on the ground side. Scheduled travel pattern information can be updated.
[0049]
In the second embodiment, the station A station device 70 transmits distance information (information C) to the next stop point (stop position at the station B) from the ground, and the on-vehicle transceiver 12 receives the information on the vehicle. Therefore, the distance information to the next stop point can be managed on the ground side, and the distance information can be updated.
[0050]
In the second embodiment, the on-board device 23 releases the departure prohibition on the condition of reception from the A station device 70, so that the train 60 acquires information from the ground transmitting means at the time of departure. Can be guaranteed.
[0051]
In the present embodiment, an example in which the present invention is applied to a track having a single-track section 74 has been described. However, the present invention is not limited to such a configuration, and can be applied to a double-track section. However, the track circuit is not provided in the single track section in many cases, and the position of the train in the section is often unknown at all. Therefore, the present invention is particularly effective when applied to the track in the single track section. be able to.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a schematic configuration of a train position detection system according to a first embodiment.
FIG. 2 is an explanatory diagram showing a setting example of a scheduled traveling pattern.
FIG. 3 is a flowchart showing a transmission process of a current position or a check signal in the on-board device.
FIG. 4 is an explanatory diagram showing a transmission state when the difference is within an allowable range.
FIG. 5 is an explanatory diagram showing a transmission state when a difference is out of an allowable range.
FIG. 6 is a block diagram showing a modification of the first embodiment.
FIG. 7 is a block diagram showing a second embodiment and its operation.
[Explanation of symbols]
1 Train position detection system, 10,60 trains, 11 GPS receivers, 12 on-board transceivers, 13,23 on-board equipment, 14,24 tracks, 20 on-board equipment, 23 on-board equipment, 25 on-board equipment, 26 on-board Child, 27 tachogenerators, 30 public wireless network, 40 GPS satellites, 74 single track sections.

Claims (7)

Position acquisition means for acquiring the current position of the train on the track on the car;
On-vehicle transmitting means for transmitting a current position signal from the position acquiring means, transmission control means for controlling the on-vehicle transmitting means, and receiving a signal from the on-vehicle transmitting means via a public wireless communication line. And a ground position detection system, comprising:
The vehicle further comprises on-board storage means for holding scheduled traveling pattern information corresponding to the elapsed time after departure from the predetermined point and the position of the train on the track,
Under the control of the transmission control means, the on-vehicle transmission means transmits a current position signal when the current position of the train is out of a predetermined area based on the scheduled traveling pattern information. system. The train position detection system according to claim 1,
The train position detecting system, wherein the on-board transmitting means transmits a predetermined check signal when the current position signal is not transmitted. The train position detection system according to claim 1 or 2,
Ground transmitting means for transmitting predetermined position calibration information from the ground,
On-board receiving means for receiving the position calibration information on the car,
Calibration processing means provided on the vehicle to calibrate the position acquisition means based on the position calibration information,
The train position detecting system, wherein the ground transmitting means transmits the position calibration information in response to a departure request from the on-board transmitting means. The train position detection system according to any one of claims 1 to 3,
Ground transmission means for transmitting the scheduled traveling pattern information from the ground,
On-board receiving means for receiving the scheduled traveling pattern information on a vehicle,
A train position detection system further comprising: The train position detection system according to any one of claims 1 to 3,
Ground transmission means for transmitting distance information to the next stop point from the ground,
On-board receiving means for receiving the distance information on a car,
A train position detection system further comprising: The train position detection system according to any one of claims 3 to 5,
A train position detection system further comprising on-board determination means for canceling departure prohibition on condition of reception from the ground transmission means. The train position detection system according to any one of claims 1 to 6,
A train position detection system, wherein the track is a single track section.

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