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Design and Implementation of Axle-counter Inspection Equipment for Track Circuit Bad Shunting in Railway Station

Author: ShiLiangRen
Tutor: FanQiFu；WangYao
School: Shanghai Jiaotong University
Course: Control Engineering
Keywords: Axle Counter Track circuit Defective Shunting Security Reliability
CLC: U284.2
Type: Master's thesis
Year: 2011
Downloads: 48
Quote: 0
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Abstract


The track circuit shunts adverse troubled by the problem of traffic and electrical works departments for many years. Railway technology sector never stopped poor track circuit shunt the to send voltage, such as adjusting the existing track circuit or electronic high-voltage pulse track circuit. But the direction has not been a safe, reliable and practical economic solutions. Only out of the existing track circuits, axle counter, can completely solve the problem of the poor track circuit shunt. The station track circuit shunt bad special circumstances, and combined orbit the section checks principle, we have designed a shunt bad track sections within the station as a control object to a single track section axle counter inspection equipment. This decentralized control makes the axle counting equipment miniaturization each track section checks are independent of each other, when the failure of a the axle counter point or section does not affect the other sections of the control. We use the current loop outdoor axle counter point to the indoor host communication to pass axle information. This way makes outdoor meter axis points out of the microcontroller, which greatly simplifies the axle counter point device, and to improve the signal of the axle counter anti-jamming performance, reliable communication distance increased to 10km or more. In the design of the system, based on the railway signal equipment high security, high reliability requirements, we have taken a number of measures to ensure the safe and reliable equipment. Hardware design: the main control unit and counting unit uses two takes two structures; choice of dynamic driving safety input and output circuits. Software design: fully consider the section of non-normal clearing and processing; redundant way to check important information; identify critical software security side. Fault detection and oriented security design: the use of the software is very comprehensive hardware detection, found failure after guiding safety. Fault detection, including micro controller self-test, detection of peripheral chips, CAN communication detection axis signal transmission channel detection and relay detection, all detected faults are given corresponding failure prompted code. Overcome these technical problems, we optimize the software and hardware design, improve system reliability, stability, greatly cut down the cost, and laid the foundation for the promotion and application of the axle counter equipment.

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CLC: > Transportation > Rail transport > Railway communication,signal > Railway signal > Track circuit
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