JP2008024146A - Calculation system of train door opening permission range - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a calculation system of a door opening permission range with a simple constitution utilizing the present system of a new ATC as much as possible and also provided with fail/safe at high accuracy. <P>SOLUTION: In the calculation system of the door opening permission range, specific information bit of a center of a platform is added to absolute position information transmitted by TP (transponder) and the maximum value of usual addition error is varied, thereby, the calculation of the present position is accomplished without unnecessarily increasing TP and safety of door control is ensured. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a train door opening permission range calculation system using ATC.

  The new ATC is a system that safely controls the train speed, and has a function to calculate the current speed and the current position with high accuracy and fail-safe. The new ATC system uses fixed point information (absolute position information) called a transponder (TP) in order to calculate the train position accurately and safely. The new ATC system inputs a frequency pulse proportional to the number of rotations of a wheel from a speed sensor (TG), and constantly calculates the current speed and travel distance. However, in actual driving, there are errors in wheel diameter, errors associated with the calculation cycle, and errors associated with idling, and a transponder (TP) is used to correct these. (Position) correction is applied. Although it differs depending on the system, correction is performed with TP every about 600 m, and in the station premises, as shown in FIG. 3, for example, a transponder TP is installed every 300 m for correction.

  However, in order to stop the train 1 on the platform 2 and open the door, the stop position needs to be strict. Therefore, when calculating the door opening permission range, as shown in FIG. 4, more transponders TP4 and TP5 are installed so as not to accumulate errors, and the position correction is performed at narrower intervals (for example, every several tens of meters). ) Can be easily conceived as a solution. However, this increases the number of TPs to be installed, which increases the cost and hardware, which is not preferable for maintenance management.

  On the other hand, a high-accuracy speed sensor and ground system will be installed to establish the train door opening allowance range calculation system that will allow the exact position of the train to be grasped and the door to be opened at the exact stop position of the platform. That is not difficult. However, introducing a new system far from the current system is not economically realistic.

  The present invention has been made in view of the problems of the prior art as described above, and does not require an additional system, and is a door opening permission range calculation system that uses the current ATC system as much as possible. An object of the present invention is to provide a door opening permission range calculation system characterized by a simple system configuration having safety.

  The present invention relates to a speed sensor that detects a train speed, an antenna that receives track circuit information necessary for door direction determination, and a platform that searches the database from the track circuit information received by the antenna to determine the platform direction. A direction determining means, a first transponder that is installed corresponding to each of both ends of the platform and transmits train absolute position information, and is installed corresponding to an intermediate part of the platform, and the train absolute position information And a second transponder that transmits information indicating the intermediate position of the platform, the train position is calculated based on the train speed from the speed sensor, and the train absolute position information is received from the first transponder Sometimes the calculated train position is replaced with the train absolute position information, and the train position The train position is corrected by adding a predetermined first error amount, and the train position calculated when the train absolute position information is received from the second transponder is replaced with the train absolute position information. A train position calculation means for correcting the train position by adding a predetermined second error amount smaller than the first error amount to the train position, and a database for registering the train length, door dimensions, and platform direction And when the speed detected by the speed sensor becomes 0, the corrected train position calculated by the train position calculation means is compared with a predetermined stop position, and the difference is A train door opening permission range calculation system comprising door opening permission determining means for determining door opening permission when in the opening control permission range and determining the opening / closing control door direction. And features.

  According to the door opening permission range calculation system of the present invention, the number of installed transponders can be reduced by adding special information such as the center of the platform to the absolute position information transmitted by the transponder and changing the maximum value of the normal integration error. Even if it is not increased more than necessary, it is possible to calculate the current position accurately and to ensure the safety of the door opening / closing control.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 3, when the train 1 travels in the forward direction and stops on the platform 2, the on-board system 10 uses the on-board receiver RV2 in the forward direction (on-board receiver RV1 in the reverse direction), It is assumed that communication is performed with the transponders TP1 to TP3 in order from the forward direction installed on the side.

  FIG. 1 shows the configuration of a train door opening permission range calculation system according to an embodiment of the present invention. The on-board system 10 receives a signal from the on-board receiver RV2, compares the calculated position calculated in the apparatus with the absolute position transmitted by the transponders TP1 to TP3, and corrects the train position. 11. Train speed calculation unit 14 for calculating the train speed from a speed sensor 13 for detecting the rotational speed of the vehicle wheel 12, a database 15 for holding various data related to the train and the route, and various signals from the ground equipment The ATC antenna 16, the platform search unit 17 for identifying the platform direction, that is, whether the platform is on the right or left of the traveling direction of the train from the information received by the ATC antenna 16, and the train stopped in the door opening permitted range A determination processing unit 18 for determining whether or not. The determination processing unit 18 transmits the door opening permission determination result to the door control device 19 and the driver assistance device 20.

  Next, the operation of the train door opening permission range calculation system configured as described above will be described. As shown in FIG. 2, the on-board system 10 performs absolute position correction at the train position correction unit 11 when the on-vehicle receiver RV2 receives the preceding transponder TP1 as the train 1 progresses, for example, , Set to 216.292 km from the starting point. Further, at the travel point immediately before the transponder TP2 at the platform middle point, the additional travel distance from the location 216.292 km of the previous transponder TP1 is obtained based on the signal from the speed sensor 13, and this is the worst error. Assuming 10m plus, the current train position is calculated in real time.

  Next, when the on-vehicle receiver RV2 receives the transponder TP2 at the platform middle point, the position of the train position correction unit 11 of the on-board system 10 is simultaneously corrected to 216.592 km from the starting point. At the same time, the transponder TP2 at the intermediate point transmits the “platform center bit” as a special bit, and the on-vehicle receiver RV2 also receives this, so the train position correction unit 11 of the on-board system 10 After the reception, up to the transponder TP3 at the final point position of the platform 2, the assumed worst error is changed to 3.5 m, and the additional traveling distance from the intermediate point 216.592 km is obtained based on the signal from the speed sensor 13. This is added assuming a worst error of 3.5 m, and the current train position is calculated in real time.

  Here, the worst error assumed here is about 1% of the installation interval from the installation interval of the transponder TP and the experience value by the current vehicle test. Therefore, the “platform center bit” not attached to the transponder TP1 and the transponder TP3 is attached to the transponder TP2, and the on-board system 10 determines the worst error used for the calculated value of the train position by judging the special bit. That is, at the normal train stop position, the speed becomes 0 km / h immediately before receiving the transponder TP3, and 3.5 m is added to the final train position calculated in real time, and the process proceeds to the door determination process.

  In the door opening permission determination process, the determination processing unit 18 refers to the train length and door dimensions registered in the database 15 and checks whether or not the vehicle has stopped in a range where door opening / closing control is possible, If it is within the range in which the door opening / closing control is possible, the platform searching unit 17 determines that the opening / closing control of one of the right / left doors is possible and instructs the door control device 19 and the driver assistance device 20.

  When the train 1 overruns the platform 2 and the on-vehicle receiver RV2 receives the transponder TP3 on the far side in the forward direction, it is determined that the position is out of the permitted range of the database by correcting the position, and the door control is protected. .

  The platform direction (right / left) determination by the platform search unit 17 is performed by registering the door direction attached to the track circuit information in the database 15 and searching from the track circuit information input from the ATC antenna 16. .

  In the above embodiment, the direction (right / left) of the platform 2 is retrieved by continuously receiving the track circuit information using the ATC antenna 16, but a door is connected to the transponder TP2 at the center of the platform. It is also possible to make a point control determination by adding a special bit for data indicating the direction.

The block diagram which shows the function structure of the on-board system of the calculation system of the train door opening permission range of one embodiment of this invention. Explanatory drawing of the calculation operation | movement of the train door opening permission range by the said embodiment. The block diagram of the example of arrangement | positioning of the transponder in the platform in a general train system. The block diagram of the example of arrangement | positioning of the transponder in the platform in the train system proposed in order to make calculation of a train door opening permission range more stringent.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Train 11 Train position correction | amendment part 12 Wheel 13 Speed sensor 14 Train speed calculation part 15 Database 16 ATC antenna 17 Platform direction search part 18 Judgment processing part 19 Door opening / closing controller 20 Driver assistance apparatus

Claims (2)

A speed sensor to detect the train speed;
An antenna that receives track circuit information necessary for door direction determination;
Platform direction determination means for searching the database from the track circuit information received by the antenna to determine the platform direction;
A first transponder installed corresponding to each end of the platform and transmitting train absolute position information;
A second transponder installed corresponding to the middle part of the platform and transmitting train absolute position information and information indicating the platform middle position;
The train position is calculated based on the train speed from the speed sensor, and when the train absolute position information is received from the first transponder, the calculated train position is replaced with the train absolute position information, and The train position is corrected by adding a predetermined first error amount to the train position, and the train position calculated when the train absolute position information is received from the second transponder is used as the train absolute position information. Train position calculating means for correcting the train position by adding a predetermined second error amount smaller than the first error amount to the train position and correcting the train position;
A database to register train length, door dimensions and platform direction;
With reference to the data in the database, when the speed detected by the speed sensor becomes 0, the corrected train position calculated by the train position calculation means is compared with a predetermined stop position, and the difference is the door opening control. A train door opening permission range calculation system comprising door opening permission determination means for determining door opening permission when in the allowable range and determining the opening / closing control door direction.   The train door opening permission range calculation system according to claim 1, wherein the first error amount is 10 m and the second error amount is 3.5 m.

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