System for detecting pressure signals of bolts for urban subway tracks and method

A technology of pressure signal and detection system, applied in railway vehicle shape measuring instrument, force/torque/work measuring instrument, measuring device, etc., can solve the problems of lack of systematic management and monitoring, high time cost, long track distance, etc. , to achieve the effect of facilitating track maintenance, reducing labor costs, and low maintenance costs
CN112109767AInactive Publication Date: 2020-12-22SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTHWEST JIAOTONG UNIV
Publication Date
2020-12-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a system for detecting pressure signals of bolts for urban subway tracks. The system comprises a pressure sensor, a wireless transmission module, an upper computer and a voltage-stabilizing circuit, wherein the pressure sensor is used for acquiring pressure generated by the pressure sensor when bolt gaskets are extruded by the bolts; the wireless transmission module is usedfor sending the pressure signals to the upper computer of a train; the upper computer is used for performing fault diagnosis of the track bolts and feeding a diagnosis result back to a trainman; andthe voltage-stabilizing circuit is used for taking electricity from a contact net arranged on the track. The method for detecting states of the bolts provided by the invention comprises the followingsteps: acquiring the pressure against the bolt gaskets through the bolts by adopting the pressure sensor; acquiring pressure and position labels of the bolts by adopting the upper computer; building abolt database; inputting the pressure of the bolts into a trained support vector classifier; and marking the bolt states. According to the system and the method disclosed by the invention, the laborcost is greatly reduced, the efficiency is high, the overall size is small, the maintenance cost is low, and later repairing of the tracks is convenient.
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Description

technical field

[0001] The invention relates to the technical field of track safety detection, in particular to a detection system and method for urban subway track bolt pressure signals. Background technique

[0002] In our country, the urban rail transit system is used to solve the problem of traffic congestion. It has four advantages: saving land, reducing noise, reducing interference, and saving energy. The fixing of subway rails on the subgrade is realized by rail fixing devices. Most of the existing rail fixing devices usually have bolts. After these rail fixing devices fix the rails, the bolts contained are one of the main force-bearing components. Its looseness can lead to rail deformation, causing the tragedy of car crash. Therefore, the stress and looseness inspection of bolts has always been an important item in the daily inspection of vehicles.

[0003] At present, although there are a variety of innovative solutions proposed in terms of patented technology, th...

Claims

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