JPH0292775A - Train position detecting system - Google Patents

Abstract

PURPOSE:To enable a train position to be clearly detected by providing a leakage coaxial cable to be laid in a predetermined section along a track of a train and receiving a signal, transmitted from an on-vehicle unit, to a ground unit through the leakage coaxial cable so as to detect the train position. CONSTITUTION:A leakage axial cable (hereinafter briefly called LCX) is laid respectively with the cables 10a, 10b in a point approaching a station on a track 1, while with LCX11a, 11b, along a platform track circuit, further LCX12a, 12b along an inner track circuit of a departure signal, and with LCX13a, 13b approaching a boundary 14 in a control range of stations A and B. A train 2 approaches the station A, when the train reaches the station approaching point, information is given and received between the train 2 and a station control unit 8a through the cable LCX10a and a to-train information transmitting unit 9a. Since a transceiving radio wave, using the cable LCX, is suddenly attenuated, when a distance exceeds the fixed value, enabling the reachable range to be limited, a position of the train 2 is traced from a output signal of each LCX10a to 13a, 10b to 13b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system for detecting the running position of a train running on a track on the ground.

[Conventional technology]

FIG. 2 is a circuit diagram showing a conventionally well-known train position detection system as a track circuit. In the figure, (1) is the rail that serves as the train track, and (2) is the train running on the rail (1), which is represented by wheels and axles in the figure. (3)
) is the rail insulation that insulates the rail (1) for each so-called block section, and (4) is the rail insulation that insulates the rail (13) on the exit side of the block section.
The power source (5) that applies voltage between the two rails is a track relay connected between the two rails (1) on the entrance side of the block section.

Next, the operation will be explained. Figure 2 shows the case where train (2) is not on the block section.

Here, a closed circuit is formed between the power supply (4) and the track relay (5) via the rail (1), and the current from wt@C4) flows into the track relay (5) as shown by the arrow. , the orbital relay (5) becomes operational. Next, as shown in Figure (b), when the train (2) enters the block section, its wheels and axles short-circuit between the rails (13), and the current flows to the track relay (5). The track relay (5) becomes inactive.

Therefore, it is possible to determine whether a train (2) is present in the block section from the operating state of the track relay (5). If the block section is set appropriately, the train position can be detected.

[Problem to be solved by the invention]

As described above, the conventional train position detection method uses the rail (1) laid on the dead ground as a medium for detection, so for example, if a metal structure falls onto the track and the rail (1)
If you bridge between 1 and 2, it will be mistakenly determined that a train is on the line even though it is not. Also rail (
If the surface of train (1) is rusty and the short circuit by train (2) is incomplete, it will be incorrectly determined that the train is not on the line even though it is. As described above, the conventional train position detection method uses the rail (1) as an intermediary, so there is a problem in that the reliability of detection is not necessarily sufficient.

This invention has been made to solve the above-mentioned problems, and aims to provide a system that enables highly reliable detection of train positions without using rails as an intermediary.

[Means and effects for solving the problem] The train position detection method according to the present invention is such that a leaky coaxial cable is laid in a predetermined section along the train track, and a signal transmitted from onboard the train is transmitted through the leaky coaxial cable. The train position is detected by receiving the signals on the ground. Transmitted and received radio waves using a leaky coaxial cable rapidly attenuate after a certain distance, and their reach can be localized, so the train position can be clearly detected using the above method.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a configuration diagram of a driving information transmission system that employs this new train position detection method. In the figure, (υ is the orbit,
(2) is a train, (6) is a central command center, (7m) (7b)
is the central control center for other adjacent line sections, (8a) and (8b) are the station control devices for A and B stations, respectively, (9a and 9b) are also the train information transmission devices, and (10m) and (10b) are the track. (1) Leaky coaxial cable C laid at the station approach point (hereinafter abbreviated as LCX), (lla) (llb) is the LCX laid along the platform track circuit, (12a)
(12b) is an LCX installed along the departure signal inner track circuit.

(13m) (13b) is an LCX installed close to the boundary 04 of the management range between A station and B station. The central command center (61) and the other line central command center (7bM7b) are connected by a dedicated transmission line.
) and the station control equipment (8m) (8b) are connected by a CTC display line or a traffic management system transmission line.

Note that the installation position of each LCX is shown for one direction in which the train (2) goes from left to right in the figure.

Next, the operation will be explained. The central command center (6) obtains and understands information such as train positions and signals from the station control devices (8a) and (8b) via the CTC display line or the traffic management system transmission line. In addition, the station control device 31 (8a) (8
h) holds timetable data such as arrival time, departure time, train number, etc. of train (21).When train (2) approaches station A and reaches the station approach point, LCX (10a) and the train Information is exchanged between the train (2) and the station control bag (i\(8&) via the information transmission device (9a).

■・Transmitted and received radio waves using CX rapidly attenuate after a certain distance, and the reach range can be localized, so train (2)
By receiving the signal from the LCX (10a) at the ground station control device (8a),
It is possible to clearly detect the presence of train (2) on the line. And LCX is LCX (10,), (11a),
(12a), (13a), (13b), (10b), (
Since the LCX is installed at a predetermined position along the track (1) and the track (1), it is possible to track the position of the train (2) using the above detection method.In this example, the LCX is set at the row number shift point, , which is installed only at train position tracking points and compared with the output of train position detection using conventional track circuits.
The train position may be detected using only the X method.

In addition, as for the specific contents of the above-mentioned information, first, the train (from 21 to the station control device (8a) (8b) is the operation number,
Train data such as destination, type, train number, etc. is transmitted from the station control device (81) (8b) to the train (2). Data is transmitted.

Train position information, etc. received by the station control devices (8a) (8b) is appropriately transmitted to the central control center (6) via the CTC display line, and is used as a backup of CTC track location information, etc. Further, the timetable data received by the train (2) is displayed on board for the crew and passengers as necessary.

The reason why LCXs (13m) (13b) are installed on both sides of the boundary 04 of the management range between stations A and B in Figure 1 is as follows. In other words, especially in transmission between a station and a train, so-called overreach to adjacent station transmission may be a problem, but this LCX (13i)
By adopting a transmission method via 13b), the above disadvantages can be avoided.

In addition to the above-mentioned information for train (2), if service information such as reserved seat release status and travel product reservation status is added, more appropriate guidance can be displayed for passengers on board.

In addition, information indicating the train status at the time of failure is added as information from the train (2) to the station control equipment (8m) (8b), and is sent in real time to the vehicle factory, vehicle inspection area, etc. via the central command center (6). If transmitted, abnormality data can be collected and diagnostic processing can be performed at a vehicle factory, etc., and this becomes an effective means for shortening the time required to recover from a vehicle failure.

〔Effect of the invention〕

As described above, in this invention, a leaky coaxial cable is installed in a predetermined section along the train track, and the train position is detected by receiving signals transmitted from onboard the train on the ground via the leaky coaxial cable. This prevents false positive detections caused by using the rail as a medium,
This makes it possible to detect train positions with high reliability.

[Brief explanation of the drawing]

Figure 71 is a configuration diagram showing a driving information transmission system employing a train position detection system according to an embodiment of the present invention, and Figure 2 is a circuit diagram showing a conventional train position detection system based on a track circuit. be. In the figure, (1) is the track, (2) is the train, and (8a) (
8b) is a station control device, (9m) (9b) is a train information transmission device, (10iM11m), etc. are leaky coaxial cables. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] Train position detection characterized by laying a leaky coaxial cable in a predetermined section along the train track, and detecting the train position by receiving signals transmitted from onboard the train on the ground via the leaky coaxial cable. method.