Fault-tolerant detection method used for positioning of urban rail traffic service detection vehicle

A technology of urban rail transit and detection methods, which is applied in the field of fault-tolerant detection of urban rail transit public works inspection vehicle positioning, and can solve the problems of missed detection in beacon detection

Inactive Publication Date: 2014-02-12
SHANGHAI UNIV OF ENG SCI
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  • Abstract
  • Description
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Problems solved by technology

Although this increases the reliability of the detection process, it also makes it possible to miss the detection of the beacon in some specific occasions.

Method used

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  • Fault-tolerant detection method used for positioning of urban rail traffic service detection vehicle
  • Fault-tolerant detection method used for positioning of urban rail traffic service detection vehicle
  • Fault-tolerant detection method used for positioning of urban rail traffic service detection vehicle

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Embodiment

[0038] A fault-tolerant detection method for the positioning of urban rail transit public works inspection vehicles. The principle of the method is as follows: firstly, the inner shaft of the photoelectric encoder outputs 1024 pulse signals every time it rotates, and the walking distance is estimated by counting the number of pulses. Then use the phase output of the photoelectric encoder to judge the walking direction, and comprehensively calculate the actual walking distance. Then, identify the output pulse (including width and upper and lower edges) after the photoelectric proximity sensor detects the beacon, and then estimate the center position of the beacon after identifying the photoelectric proximity sensor pulse. Finally, after the center position of the beacon is determined, data correction is performed on the forward walking distance from the current moment.

[0039] The method consists of the following two steps:

[0040] Step 1: When the maintenance trolley moves,...

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Abstract

The invention relates to a fault-tolerant detection method used for positioning of an urban rail traffic service detection vehicle. The fault-tolerant detection method includes the following steps that 1), when the service detection vehicle moves, a processor calculates traveling distance and direction of the service detection vehicle according to received the number of pulses and phase output sent by a photoelectric encoder; 2), when the service detection vehicle passes through each beacon, the processor corrects the traveling distance of the service detection vehicle according to pulse signals output by at least one of a forward photoelectric proximity sensor and a backward proximity sensor. Compared with the prior art, the fault-tolerant detection method has the advantages of high detection reliability, less proneness to leak detection of the beacons and the like.

Description

technical field [0001] The invention relates to a rail transit detection method, in particular to a fault-tolerant detection method for the positioning of an urban rail transit public work inspection vehicle. Background technique [0002] Urban rail transit arranges equipment maintenance and overhaul work along the line during the late-night outage of trains. At present, it usually uses manual walking and human-carrying tools to reach the destination. Designing and making a portable track maintenance trolley can solve this requirement, but in specific application environments, special considerations need to be taken into account: the trolley may walk forward and backward at will, and the wheels of the trolley may slip and idling, etc. The calculation error brought by the time, which needs to be solved by appropriate digital information processing. [0003] The existing invention patent application "A Positioning System for Maintenance Vehicles in Urban Rail Transit" propose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61L25/00
Inventor 周民立
Owner SHANGHAI UNIV OF ENG SCI
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