JP2000177588A - Train approach information transmission device and train approach warning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a train approach information transmission device requiring no large amount of equipment investment and an inexpensive train approach warning device easy in arrangement and removal. SOLUTION: A train approach information transmission device is constituted by adding a function of sending out control data to respective track circuits T through a transmission cable L by converting this control data into an electric signal by generating the control data by adding train approach information to ATC control information to a digital ATC central control device 10 constituted of a transmission part A, a reception part B and a control part C. A train approach warning device 20 is formed as a portable type arrangeable in close vicinity to a track 30, and is constituted of a detecting part for detecting the electric signal, a train approach information decoding part, a warning setting part, a train approach discriminating part and a warning part for outputting a signal when these information coincide with each other by comparing the train approach information with information set in the warning setting part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train approach information transmitting apparatus for transmitting train approach information to a track circuit for notifying a maintenance worker at a site, in particular, of a train approach, and receiving the train approach information, and The present invention relates to a train approach warning device that detects when a train enters a set section and issues an alarm.

[0002]

2. Description of the Related Art In order to ensure the safety of maintenance work, one method of notifying a maintenance worker of the approach of a train is to use a flag or a transceiver. In other words, a method is used in which an observer is placed at a location on the train approach side that is separated from the work site by a predetermined distance, and the approach of the train visually observed by the observer is reported to the work site using a flag or a transceiver. However, since at least two reliable guards must be assigned, there is a problem that it is difficult to secure the guards and the labor cost increases. Therefore, various train approach warning devices capable of notifying a train approaching without requiring a supervisor have been developed or proposed so far.

The approach warning device for a vehicle or the like disclosed in Japanese Patent Application Laid-Open No. 53-23408 comprises a pair of vehicle detection circuits including a transmitter and a receiver arranged opposite to each other with a track interposed therebetween. A required number of the circuits are arranged above and below the work site, and an alarm transmitter, an upper and lower discriminator, and a unit configured with a signal receiving circuit and the like and the vehicle detection circuit are connected with a coaxial cable, It is configured to detect the passage of a vehicle and transmit an alarm.
However, this conventional train approach warning device requires two or more dedicated train position detectors for detecting the position of a train, and installation and removal of these train position detectors requires a lot of manpower and time. There is a problem.

[0004] As a conventional train approach warning device that does not use a dedicated train detector, there is a device that utilizes on-track detection of a track circuit. That is, a train approach alarm is placed at the work site,
The train approach alarm is connected from a work site to, for example, a track relay that is a track detector of the track circuit immediately before by a cable, and a train approach signal is notified by a track signal of the track relay. However, this conventional train approach warning device also requires a cable of several hundred meters, so that there is a problem that it takes time and labor to install and remove it.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a train approach information transmitting apparatus which does not require a large capital investment. A second problem to be solved is to provide an inexpensive train approach warning device that is easy to install and remove. A third problem to be solved is to prevent a danger to the on-site worker due to a failure of the train approach warning device or the like.

[0006]

In order to solve the above-mentioned first problem, a train approach information transmitting apparatus according to the present invention comprises a receiving section for collecting on-rail information for each closed section, and an automatic train control based on on-rail information. Control information generating unit for generating control information for
A train approach information generating unit for generating train approach information based on on-rail information, a control data generating unit for generating control data including the control information and the train approach information, and a transmission cable by converting the control data into a current signal. And a transmission unit for transmitting the signal to the track circuit.

[0007] In order to solve the third problem, a train approach warning device according to the present invention comprises a detector for detecting a current signal flowing on a track, and decoding train approach information from an output signal of the detector. A train approach information decoding unit, an alarm setting unit that sets a track circuit to issue an alert, a train approach that outputs a train approach signal when the decoded train approach information is compared with the information set in the alert setting unit and they match. A discriminating unit and an alarm unit for issuing an alarm based on an output signal of the train approach discriminating unit are provided.

[0008] In order to solve the third problem, an alarm is issued even when the train approach information decoding unit cannot decode the train approach information.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows closed sections T1, T2, T
Orbit 30 including 3, T4, T5, T6, T7 and T8
FIG. 1 is an overall configuration diagram when a train approach information transmitting device and a train approach warning device according to the present invention are applied. The closed section is a track circuit, and in the following description, the closed section is indicated as a track circuit as necessary. Further, these track circuits are given identification numbers ID. In FIG. 1, reference numeral 10 denotes a central management device, and reference numeral 20 denotes a train approach warning device.

The train approach information transmitting device according to the present invention is basically the central management device 10 for the automatic train control device installed in the equipment room of the main station. The central management device 10 includes a transmission unit A, a reception unit B, a control unit C, and an input / output interface D. One transmission unit and one reception unit are provided for each track circuit, and are connected by a transmission cable L between them. That is, the track circuit T1
Is connected to a transmission unit A1 via a transmission cable L11, and the other end is connected to a reception unit B1 via a transmission cable L12. One end of the track circuit T2 is connected to a transmission unit A2 via a transmission cable L21, and the other end is connected to a reception unit B2 via a transmission cable L22. Similarly, the third track circuits T3 to n
The corresponding transmission unit and reception unit of the central management device 10 are also connected to the third track circuit Tn via corresponding transmission cables. n is the number of closed sections covered by one central management device. For example, the average interval of the closed sections is about 2
In the commuting line section of 00 m, it is about 30 to 40 for each direction. The control data is sent to the track circuit as a current signal.

In FIG. 1, the preceding train R1 is a closed section T8.
, And the following train R2 is on the closed section T3. The train approach warning device 20 is installed near the track circuit in the closed section T7. In the closed section T3, since the track circuit is short-circuited by the axle of the train R2, the control data from the transmitting unit A3 cannot be received by the corresponding receiving unit B3. Thereby, the control unit C detects that a train exists in the closed section T3, that is, detects the presence of a train. Similarly, also in the closed section T8, since the track circuit is short-circuited by the axle of the train R1, the control data from the transmitting unit A8 cannot be received by the corresponding receiving unit B8. Thereby, the control unit C detects that a train exists in the closed section T8. The other closed section in FIG.
Since there are no trains at T2, T4, T5, T6 and T7, there is no short circuit in the track circuit, and the respective receiving units receive the respective track circuit control data. In this way, the control unit C of the central management device 10 has all the closed sections,
Therefore, the on-rail information of the drive circuit is collected and stored in the storage unit.

As shown in FIG. 2, the control unit C includes a central processing unit (C) for performing various arithmetic processing and control according to a program.
PU) 11, a read only memory (ROM) 12 in which programs and the like are stored, and a random access memory (RAM) 13 for storing calculation result information and the like. RAM1
3 includes at least a track circuit ID storage unit 13a, an on-rail information storage unit 13b, an opening section number storage unit 13c, a departure / arrival line storage unit 13d, a temporary speed limit storage unit 13e, and a train approach information storage unit 13f. It is. Further, the control unit C
As shown in FIG. 4, this is composed of a control information generation unit C1, a train approach information generation unit C2, and a control data generation unit C3.

The train approach warning device 20 includes a detection unit 21 for detecting a current signal flowing in a track, and a train approach information decoding unit 2 for decoding train approach information from an output signal of the detection unit 21.
2. Alarm setting unit 2 for setting the orbital circuit to issue an alarm
3. The train approach discriminating unit 24 that compares the decoded train approach information with the setting information set in the alert setting unit 23 and outputs a train approach signal when they match, and issues an alert based on the output signal of the train approach determining unit. And an alarm unit 25 that issues an alarm.

The operation of the present invention will be described below. The control data in the present invention is, for example, a digital signal having a frame configuration as shown in FIG. That is, the control data includes the flag, the track circuit ID, the departure / arrival track line, the number of open sections, the temporary speed limit, the train approach information, and the check code CRC. The track circuit ID is a track circuit identification number for knowing which closed section is currently running, and the number of open sections is the number of closed sections that can travel forward and is a distance signal from the preceding train. . As is apparent from a comparison of the frame configuration shown in FIG. 5 with the frame configuration of control data used in the conventional digital automatic train control system of FIG. 6, the train approach information is newly added to the control data of the present invention. It is added.

The train approach information uses 10 bits if, for example, a track circuit of 10 sections is a section to be notified of train approach. That is, the on-rail is 1 and the on-rail is 0, the first bit is the track, the second bit is the track circuit one section before in the direction opposite to the traveling direction of the train, and the third bit is 2
Similarly, the tenth bit is assigned to the track circuit before the section and the track circuit before the section 9 to generate the train approach information. In FIG. 1, when there is no train on the track circuits in eight sections before the track circuit T1, the control unit C
The train approach information generated by the train approach information generation unit C2 is as follows. That is, the train approach information transmitted to the track circuit T7 is a 10-bit digital signal 000000
10000, the train approach information transmitted to the track circuit T6 is 0000001000, the train approach information transmitted to the track circuit T5 is 00000000100, the train approach information transmitted to the track circuit T4 is 000000000010, and the train transmitted to the track circuit T3. Approach information is 000000
001. The train approach information is generated by the CPU 11 reading the on-rail information from the on-rail information storage unit 13b of the RAM 13 and performing a predetermined process according to a program stored in the ROM 12.

The above is the description of the train approach information generated when the train is on the track circuit T3 and the train is not on the track circuits in eight sections before the track circuit T1. Even when a plurality of trains are present in the notification target section, it is of course possible to generate train approach information. For example, when a train is present in the closed section T1 together with the closed section T3, the train circuit information T1010001000 is stored in the track circuit T7.
0 is transmitted. When it is desired to reduce the number of bits allocated to the train approach information, there is a method of expressing the distance to the closest train following the vehicle by a binary number. In this case,
With 4 bits, it is possible to generate train approach information for up to 15 sections. That is, in the case of FIG. 1, train approach information of 0001 is transmitted to the track circuit T3, 0010 is transmitted to the track circuit T4, 0011 is transmitted to the track circuit T5, 0100 is transmitted to the track circuit T6, and 0101 is transmitted to the track circuit T7. .

In FIG. 1, the number of open sections as control information generated by the control information generating section C1 of the control section C is 0 in the closed section T7, 1 in the closed section T6, 2 in the closed section T5, and 2 in the closed section T5. It is 3 in T4 and 4 in the closed section T3. The control information is generated by the CPU 11 reading the on-line information from the on-line information storage unit 13b of the RAM 13 and performing a predetermined process according to a program stored in the ROM 12.

The control data generation section C3 of the control section C generates control data including the control information and the train approach information as shown in the frame configuration in FIG. The control data is R
CPU according to the program stored in OM12
11 is required from the track circuit ID storage unit 13a, on-rail information storage unit 13b, opening section number storage unit 13c, departure / arrival track storage unit 13d, temporary speed limit storage unit 13e, and train approach information storage unit 13f of the RAM 13. Information is read out and subjected to a predetermined process.

The control data thus generated and transmitted to the closed section T3 includes a track circuit ID for identifying the closed section T3, control information indicating three open sections, and train approach information 0000000000001. Have been. The on-board device of the train R2 receives this control data and calculates the distance to the preceding train based on the number of open sections. The on-board device stores, in an internal memory, vehicle performance information such as curve data, slope correction, and turnout data, and braking performance and maximum allowable speed. The on-board device obtains the upper limit speed at which the vehicle can travel in the closed section on the line, that is, the speed limit from the information and the calculated distance information to the preceding train. Then, the on-board device compares the speed limit with the actual running speed, and operates the brake to automatically control the speed of the train. In digital ATC system,
Transmission of control data to each track circuit is 500-3000
Hz, at a speed of 60 to 300 bps,
It is repeated as 40 to 100 bits of data.
Note that the train approach information is not used for automatic train control, but is used when it is necessary to know on a vehicle which closed section in the notification section a subsequent train is on.

The control data sent to the closed section T7 is
Track circuit ID for identifying the closed section T7, control information indicating the number of open sections 0, and train approach information 000001
0000 is included. In FIG. 1, the closed section T7
The train approach warning device 20 installed in the
Detects this control data. Train approach information decoding unit 22
Is the train approach information 000001 from the detected control data.
0000 is extracted, and it is decoded from this digital information that a train is present in the closed section four sections before. The train approach determination unit 24 is provided with the decoded train approach information and the alarm setting unit 23.
Is compared with the alarm section set value, and when they match, a train approach signal is output, and the alarm unit 25 is activated. The alarm unit 25 emits a buzzer sound, voice or light,
Notify on-site workers of approaching trains. The alarm section set value is
The number of sections before the blockage section where the train approach warning device 20 is installed is set. For example, in FIG. 1, if the warning section is set to 4, when the train R2 enters the closed section T3, the train approach warning device 20 detects the approach of the train and issues a warning.

[0021] The train approach warning device 20 is also used when the train approach information decoding unit 22 cannot decode the train approach information.
Activate the alarm unit 25 to generate an alarm. Thereby, even if the train approach warning device 20 breaks down or malfunctions, the on-site worker is not exposed to danger. Although the train approach warning device 20 is basically configured by applying a conventional on-board device for ATC, particularly a receiver thereof, it does not require the use of control information. Becomes simple.

The detecting section 21 of the train approach warning device 20 can be realized by a normal current detecting coil. Therefore, the rail 31
It can be easily installed on the sleeper 32 in close proximity to and removed by the field worker himself. Since the main body of the train approach warning device 20 except the detection unit 21 can be reduced in size and weight, it is convenient to carry and can be installed on any track.

[0023]

As described above, according to the present invention, a low-cost train approach information transmitting device capable of reliably reporting the approach of a train anywhere in a line section where automatic train control is adopted can be realized. In other words, the train approach information transmitting device has a function of generating train approach information and adding it to the conventional digital ATC control data in addition to the function of the central control device for ATC. As a result, the equipment investment could be greatly reduced.

Since the train approach warning device is portable and does not require a long cable or a special mounting base, installation and removal at the site is much easier than the conventional one, and labor and cost are greatly reduced. Could be reduced. Also,
Since the train approach warning device can be basically configured by applying a conventional on-board receiver for ATC, the cost required for the design and manufacture thereof can be reduced. Furthermore, the train approach warning device according to the present invention has an advantage that the track circuit to which a warning is to be issued by the warning setting unit can be arbitrarily changed according to the situation of the on-site work.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic configuration of the present invention.

FIG. 2 is a block diagram illustrating a configuration of an embodiment of a central management device.

FIG. 3 is a block diagram illustrating a configuration of an embodiment of a train approach warning device.

FIG. 4 is a basic functional block diagram of a control unit of the central management device.

FIG. 5 is a diagram illustrating an example of a frame configuration of control data according to the present invention.

FIG. 6 is a diagram showing an example of a frame configuration of control data in a conventional digital ATC.

[Explanation of symbols]

 A, A1 to A8 Transmission unit B, B1 to B8 reception unit C Control unit D Input / output interface L, L11, L12 to L81, L82 Transmission cable R1, R2 Train 10 Central management unit 11 Central processing unit (CPU) 12 ROM 13 RAM 13a Track circuit ID storage unit 13b Track information storage unit 13c Number of open sections storage unit 13d Departure / arrival track storage unit 13e Temporary speed limit etc. storage unit 13f Train approach information storage unit 20 Train approach warning device 21 Detecting unit 22 Train Approach information decoding unit 23 Alarm setting unit 24 Train approach determination unit 25 Alarm unit 30 Track 31 Rail 32 Sleepers

Claims (3)

[Claims] A receiving unit that collects on-rail information for each closed section;
A control information generating unit for generating control information for automatic train control based on the on-rail information, a train approach information generating unit for generating train approach information based on the on-rail information, and generating control data including the control information and the train approach information A train approach information transmitting device, comprising: a control data generating unit; and a transmitting unit that converts the control data into a current signal and transmits the current signal to a track circuit via a transmission cable. 2. A detecting section for detecting a current signal flowing through a track circuit, a train approach information decoding section for decoding train approach information from an output signal of the detecting section, and an alarm setting section for setting a track circuit to issue an alarm. Comparing the decoded train approach information with the information set in the alert setting unit, and outputting a train approach signal when they match, and issuing an alert based on the output signal of the train approach determiner. A train approach warning device consisting of a warning unit. 3. The train approach warning device according to claim 2, wherein the train approach information decoding unit is configured to activate the alarm unit and issue an alarm when the train approach information decoding unit fails to decode the train approach information.