JP3872382B2 - Train position detection system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a train position detection system that detects the position of a train on a track, and particularly relates to a system that takes into account reductions in equipment costs and communication costs.
[0002]
[Prior art]
In the single track section where the track between stations is shared by the upper and lower lines, a special automatic closing device that does not have a track circuit between stations is used. This device transmits a signal indicating that the train has entered from one end of the single track section to the other end side so that the train does not enter from both sides of the single track section, and prohibits entry, thereby waiting for the turn across the single track section. It is something to be made.
[0003]
By the way, even in such a configuration, if the position of a train in a single track section can be detected in detail, it is beneficial to improve 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 stations, or if a station circuit is divided into a number of track sections and a track circuit is provided for each of them, the equipment cost becomes high. Also, in order to detect the position on the vehicle side and transmit it to the ground, it is expensive to install a dedicated radio equipment for that purpose. In addition, since it is necessary to transmit data frequently in order to transmit the current position information of a vehicle that is traveling at high speed, the communication cost becomes excessive when using a public wireless service.
[0005]
Accordingly, an object of the present invention is to realize detailed position detection of a train at a low cost.
[0006]
[Means for Solving the Problems]
According to a first aspect of the present invention, as described in claim 1, position acquisition means for acquiring a current position of a train on a track on a vehicle, and vehicle transmission means for transmitting a current position signal from the position acquisition means; A train position detection system comprising: a transmission control unit that controls the on-board transmission unit; and a ground reception unit that receives a signal from the on-board transmission unit via a public wireless communication line. Further comprising on-vehicle storage means for holding scheduled travel pattern information in which the elapsed time after departure from the point and the position of the train on the track correspond to each other, and by the control of the transmission control means, the on-vehicle transmission means, A train position detection system that transmits a current position signal when a current position of a train is outside a predetermined region based on the scheduled traveling pattern information.
[0007]
In the first aspect of the present invention, the position acquisition means detects the current position of the train on the track on the vehicle, the on-vehicle transmission means transmits the current position signal under the control of the transmission control means, and the signal is received 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 retains 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 associated with each other, and the current position of the train is determined. Since the on-board transmission 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]
The second aspect of the present invention is the train position detection system according to the first aspect, wherein the on-board transmission means outputs a predetermined verification signal when the current position signal is not transmitted. A train position detection system characterized by transmitting.
[0009]
In the second aspect of the present invention, since the on-board transmission means transmits a predetermined verification signal when the current position signal is not transmitted, the communication state can be confirmed even when traveling along the planned traveling pattern is performed.
[0010]
According to a third aspect of the present invention, there is provided the train position detection system according to claim 1 or 2, wherein the ground transmission means for transmitting predetermined position calibration information from the ground, and the position calibration information. On-vehicle reception means, and calibration processing means provided on the vehicle for calibrating the position acquisition means based on the position calibration information, wherein the ground transmission means is the on-vehicle transmission. The train position detection system transmits the position calibration information in response to a departure request from the means.
[0011]
In the third aspect of the present invention, the ground transmission means transmits the position calibration information from the ground, the on-vehicle reception means receives it on the vehicle, and the calibration processing means calibrates the position acquisition means based on the position calibration information. The position detection error can be reduced. In normal operation, the stop point of the train at the station is determined, and when a departure request is made, it can be estimated that the train is at the specified stop point. Therefore, the position calibration is performed as in the third aspect of the present invention. By transmitting the information in response to the departure request from the on-vehicle transmission means, the position acquisition means can be calibrated without using ground equipment such as a ground element.
[0012]
The fourth aspect of the present invention is the train position detection system according to any one of claims 1 to 3, as described in the fourth aspect, wherein the planned transmission pattern information is transmitted from the ground; An on-vehicle receiving means for receiving the scheduled traveling pattern information on the vehicle.
[0013]
In the fourth aspect of the present invention, the ground transmission means transmits the scheduled traveling pattern information from the ground, and the on-vehicle receiving means receives the information on the vehicle, so that the scheduled traveling pattern information can be managed on the ground side, and the scheduled traveling pattern Information can be updated.
[0014]
The fifth aspect of the present invention is the train position detection system according to any one of claims 1 to 3, wherein the distance information to the next stop point is transmitted from the ground. And an on-vehicle receiving means for receiving the distance information on the vehicle.
[0015]
In the fifth aspect of the present invention, the ground transmission means transmits distance information to the next stop point from the ground, and the on-vehicle reception means receives it on the vehicle, so the distance information to the next stop point is managed on the ground side. And distance information can be updated.
[0016]
A sixth aspect of the present invention is the train position detection system according to any one of claims 3 to 5, wherein the departure prohibition is canceled on condition that reception from the ground transmission means is performed. It is a train position detection system further provided with on-vehicle determination means.
[0017]
In the sixth aspect of the present invention, the on-board determination means cancels the departure prohibition on the condition that reception from the ground transmission means is performed, so that it can be ensured that the train side acquires information from the ground transmission means at the time of departure. .
[0018]
A seventh aspect of the present invention is the train position detection system according to any one of claims 1 to 6, wherein the track is a single track section as described in the seventh aspect. System.
[0019]
In many cases, the track circuit is not provided in the single-track section, and the position of the train in the section is often unknown at all, so that the present invention is particularly effective when applied to the track of the single-track section. it can.
[0020]
DETAILED DESCRIPTION OF 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 the first embodiment of the present invention. The train 10 travels on the track 14. A GPS receiver 11 and an on-vehicle transmitter / receiver 12 are installed on the roof of the train 10, and both are connected to an on-vehicle device 13.
[0021]
The GPS receiver 11 is a position acquisition means in the present invention, and is configured to receive radio waves from at least three GPS satellites 40 and to calculate the latitude and longitude of the current position of the train 10 according to this. . The on-vehicle transmitter / receiver 12 is configured to perform wireless communication with the ground device 20 through the public wireless network 30. As the public wireless network 30, it is preferable to use a commercial packet communication network.
[0022]
The on-board 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-board transmitter / receiver 12, an elapsed time after leaving a predetermined point for the train 10, and on the track It has a storage function for holding scheduled travel pattern information that is associated with the position of the train.
[0023]
The ground device 20 is installed at a train station, receives a signal from the on-board transmitter / receiver 12 via the public wireless network 30, and analyzes the received signal to extract current position information of the train 10. And an output processing function.
[0024]
The on-board device 13 and the ground device 20 are both configured to include a fail-safe microprocessor centered on a CPU in terms of hardware, and although not shown in detail, a ROM storing a processing program and a ROM A RAM for temporarily storing data, a communication port, an input / output port, and a hard disk device as an external storage device are provided.
[0025]
In the storage area of the on-board device 13, a scheduled traveling pattern (see FIG. 2) in which the elapsed time after leaving a predetermined point and the position of the train 10 on the track 14 are associated with each other, for example, as a data file in a table format Is retained.
[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 data file in a table format.
[0027]
The operation of the first embodiment configured as described above will be described. In the present embodiment, the current position signal is transmitted when the current position deviates greatly from the planned traveling pattern, and the verification signal is transmitted in other cases. The data size of the verification signal is set small enough to check the communication state.
[0028]
In FIG. 3, first, current position information calculated at predetermined sampling times in the GPS receiver 11 is read into the on-board device 13 (S1). Next, the current position information is converted into a distance from the departure point (for example, station A) by referring to the position / route distance table described above (S2).
[0029]
On the other hand, the on-board device 13 refers to the planned travel pattern based on the elapsed time after leaving A station, and reads the standard distance (route distance from A station) 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 outside the allowable range, distance information (current position information) from the current departure point is determined in advance for the train 10 under the control of the on-board transceiver 12. It is transmitted together with the train ID and current time information (S5). On the other hand, if the current distance is within the allowable range as a result of this determination, 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 the elapsed time from the previous transmission of the verification signal exceeds a predetermined setting 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, for one minute.
[0033]
In this way, in the present embodiment, the current position signal is transmitted when the current position greatly deviates from the planned traveling pattern, and the verification signal is transmitted in other cases. That is, as shown in FIG. 4, if the difference between the actual train position and the train position according to the planned traveling pattern is within an allowable range, the train position is transmitted at a constant period (t), and as shown in FIG. In addition, when the difference exceeds the allowable range, the train position is transmitted more densely (high frequency) than the fixed period (t), and the train position is transmitted to the ground device 20 in real time.
[0034]
The current position information / train ID / current time information or verification signal transmitted from the on-board transmitter / receiver 12 is received and analyzed by the ground device 20, and transferred to an operation management device and a passenger guide device (not shown); Storage into a predetermined log database is performed.
[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-board transceiver 12, and the ground device 20 transmits the signal to the public wireless network 30. Receive via. Here, in the present embodiment, when the planned traveling pattern is held in the storage area of the on-board device 13 and the current position of the train is outside the predetermined area including the planned traveling pattern, the on-vehicle transceiver 12 Since the position signal is transmitted, the communication cost can be reduced by reducing the frequency of data transmission.
[0036]
Moreover, in this embodiment, since the on-vehicle transmitter / receiver 12 transmits a predetermined verification signal when not transmitting the current position signal, the communication state can be confirmed even when traveling along the planned traveling pattern is performed.
[0037]
In the first embodiment, the acquisition or detection of the position information on the vehicle is performed by the GPS receiver 11. However, as long as the acquisition of the position information in the present invention is performed on the vehicle, other various kinds of information are obtained. Can be used. For example, as in the modification shown in FIG. 6, a ground unit 25, which is a known electromagnetic induction type non-powered transponder, is installed in the vicinity of the track 24, and below the floor of the train 60, A vehicle upper element 26 configured to be able to receive a signal and transmit a power wave to the ground element 25 is provided, and a tachometer generator 27 is provided on the wheel of the train 60. A signal from the ground element 25 is provided in the on-vehicle device 23. The speed information from the tachometer generator 27 may be integrated based on the reception point of time to obtain the current position, and the same effect as in the above embodiment can be obtained by such a structure.
[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 tacho generator 27 as in the above-described modification, and in particular, predetermined position calibration information and a schedule from a ground device. The traveling pattern information and the distance information to the next stop point are transmitted to the train 60 and used.
[0039]
In the figure, an A station apparatus 70 is installed at the A station, and a B station apparatus 71 is installed at the B station, both of which are connected by an inter-station communication cable 72. There is a single-line section 74 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 thereto 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 known personal computers.
[0040]
In the present embodiment, in response to a departure request from the on-vehicle transmitter / receiver 12, it is determined in the operation management console 76 whether a predetermined departure permission condition is satisfied. The on-board device 23 cancels the departure prohibition on condition that the departure permission signal is received.
[0041]
Specifically, first, when the train 60 departs from the station A, the driver sends a departure request from the on-board transceiver 12 by operating the on-board equipment. A train ID unique to the train 60 is automatically attached to this departure request.
[0042]
When the station A station device 70 as the ground device receives this departure request via the public wireless network 30, in response to this, the station A station device 70 uses the train ID as a key from the 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 (ie, regular stop position at station A)
Information B: Scheduled travel pattern information between A and B stations C: Distance to the stop position of B station 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, the accumulated distance is calibrated by the tacho generator 27 using the information A. That is, the accumulated distance by the tacho generator 27 is reset with the current train position as the distance 0 point.
[0045]
Second, during traveling in the single track section 74, using the information B, the same processing as the processing in FIG. 3 in the first embodiment, that is, whether the current position of the train 60 is within a predetermined region including the planned traveling pattern. And transmission processing of the current position signal from the on-vehicle transmitter / receiver 12 when it is outside the predetermined distance.
[0046]
Third, using the information C, it is determined whether the train 60 has entered the premises or close range of the station B, and a signal to that effect is transmitted on the condition that the train 60 has entered the premises or close range. Transmission from 12 is performed. This signal is received by the station B station device 71 and is reflected in real time on the operation management console 76 of the center facility 75 and the operation management information of the monitor device 77.
[0047]
As described above, in the second embodiment, the station A station device 70 as the ground transmission means transmits the position calibration information from the ground, and the on-board transmitter / receiver 12 receives the information on the vehicle, and the on-board device 23 is positioned. Since the accumulated distance by the tacho generator 27 is calibrated based on the calibration information, the position detection error can be reduced. Also, in normal operation, the stop point of the train at the station is defined, and when a departure request is made, it can be estimated that the train is at the specified stop point. By performing the transmission in response to the departure request from the on-vehicle transmission means, the position information on the vehicle can be calibrated without using ground facilities such as a ground unit.
[0048]
Further, in the second embodiment, the station A station device 70 transmits the scheduled traveling pattern information from the ground, and the on-vehicle transmitter / receiver 12 receives this on the vehicle, so that the scheduled traveling pattern information can be managed on the ground side, Planned driving pattern information can be updated.
[0049]
Moreover, in 2nd Embodiment, the A station station apparatus 70 transmits the distance information (information C) to the next stop point (stop position in B station) from the ground, and the on-vehicle transceiver 12 receives this on the vehicle. Therefore, distance information to the next stop point can be managed on the ground side, and distance information can be updated.
[0050]
In the second embodiment, the on-board device 23 cancels the departure prohibition on the condition that it is received from the station A station device 70, so that the train 60 side acquires information from the ground transmission means at the time of departure. Can ensure.
[0051]
In the present embodiment, the example in which the present invention is applied to the track including the single-line section 74 has been described. However, the present invention is not limited to such a configuration, and can be applied to a double-line section. However, there are many cases where the track circuit is not provided in the single-track section, and there are many cases where the position of the train in the section is completely unknown. be able to.
[Brief description of the drawings]
FIG. 1 is a block diagram showing 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 planned traveling pattern.
FIG. 3 is a flowchart showing a current position or verification signal transmission process in the on-board device.
FIG. 4 is an explanatory diagram showing a transmission state when a difference is within an allowable range.
FIG. 5 is an explanatory diagram showing a transmission state when the difference is outside the 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 train, 11 GPS receiver, 12 on-board transceiver, 13, 23 on-board device, 14, 24 track, 20 ground device, 23 on-board device, 25 on-ground device, 26 on-vehicle Child, 27 tacho generator, 30 public wireless network, 40 GPS satellites, 74 single track section.

Claims (7)

Position acquisition means for acquiring the current position of the train on the track on the vehicle;
On-vehicle transmission means for transmitting a current position signal from the position acquisition means, transmission control means for controlling the on-vehicle transmission means, and signals from the on-vehicle transmission means are received via a public wireless communication line. A train position detection system comprising ground receiving means,
Further comprising on-vehicle storage means for holding 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 associated with each other;
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 outside a predetermined area based on the scheduled traveling pattern information. system. The train position detection system according to claim 1,
The train position detection system, wherein the on-vehicle transmission means transmits a predetermined verification signal when not transmitting the current position signal. The train position detection system according to claim 1 or 2,
Ground transmission means for transmitting predetermined position calibration information from the ground;
On-vehicle receiving means for receiving the position calibration information on the vehicle;
Calibration processing means that is provided on a vehicle and that calibrates the position acquisition means based on the position calibration information;
The train position detection system, wherein the ground transmission means transmits the position calibration information in response to a departure request from the on-vehicle transmission means. The train position detection system according to any one of claims 1 to 3,
A ground transmission means for transmitting the planned traveling pattern information from the ground;
On-vehicle receiving means for receiving the scheduled traveling pattern information on the 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 from the ground to the next stop point;
On-vehicle receiving means for receiving the distance information on the vehicle;
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-vehicle determination means for canceling departure prohibition on condition that reception from the ground transmission means is performed. 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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