In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position Sensor

Railway wheel tread flat is one of the main faults of railway wheels, which brings great harm to the safety of vehicle operation. In order to detect wheel flats dynamically and quantitatively when trains are running at high speed, a new wheel flat detection system based on the self-developed reflect...

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Main Authors:	Run Gao, Qixin He, Qibo Feng, Jianying Cui
Format:	Article
Language:	English
Published:	MDPI AG 2020-09-01
Series:	Sensors
Subjects:	railway wheel condition monitoring laser collimation wayside measurement
Online Access:	https://www.mdpi.com/1424-8220/20/17/4969

id	doaj-6b9f9a8c4ad14141a4bc69b521445dec
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spelling	doaj-6b9f9a8c4ad14141a4bc69b521445dec2020-11-25T02:45:45ZengMDPI AGSensors1424-82202020-09-01204969496910.3390/s20174969In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position SensorRun Gao0Qixin He1Qibo Feng2Jianying Cui3Key Lab of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaKey Lab of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaKey Lab of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaKey Lab of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, ChinaRailway wheel tread flat is one of the main faults of railway wheels, which brings great harm to the safety of vehicle operation. In order to detect wheel flats dynamically and quantitatively when trains are running at high speed, a new wheel flat detection system based on the self-developed reflective optical position sensor is demonstrated in this paper. In this system, two sensors were mounted along each rail to measure the wheel-rail impact force of the entire circumference by detecting the displacement of the collimated laser spot. In order to establish a quantitative relationship between the sensor signal and the wheel flat length, a vehicle-track coupling dynamics analysis model was developed using the finite element method and multi-body dynamics method. The effects of train speed, load, wheel flat lengths, as well as the impact positions on impact forces were simulated and evaluated, and the measured data can be normalized according to the simulation results. The system was assessed through simulation and laboratory investigation, and real field tests were conducted to certify its validity and correctness. The system can determine the position of the flat wheel and can realize the quantification of the detected wheel flat, which has extensive application prospects.https://www.mdpi.com/1424-8220/20/17/4969railway wheelcondition monitoringlaser collimationwayside measurement
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Run Gao Qixin He Qibo Feng Jianying Cui
spellingShingle	Run Gao Qixin He Qibo Feng Jianying Cui In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position Sensor Sensors railway wheel condition monitoring laser collimation wayside measurement
author_facet	Run Gao Qixin He Qibo Feng Jianying Cui
author_sort	Run Gao
title	In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position Sensor
title_short	In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position Sensor
title_full	In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position Sensor
title_fullStr	In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position Sensor
title_full_unstemmed	In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position Sensor
title_sort	in-service detection and quantification of railway wheel flat by the reflective optical position sensor
publisher	MDPI AG
series	Sensors
issn	1424-8220
publishDate	2020-09-01
description	Railway wheel tread flat is one of the main faults of railway wheels, which brings great harm to the safety of vehicle operation. In order to detect wheel flats dynamically and quantitatively when trains are running at high speed, a new wheel flat detection system based on the self-developed reflective optical position sensor is demonstrated in this paper. In this system, two sensors were mounted along each rail to measure the wheel-rail impact force of the entire circumference by detecting the displacement of the collimated laser spot. In order to establish a quantitative relationship between the sensor signal and the wheel flat length, a vehicle-track coupling dynamics analysis model was developed using the finite element method and multi-body dynamics method. The effects of train speed, load, wheel flat lengths, as well as the impact positions on impact forces were simulated and evaluated, and the measured data can be normalized according to the simulation results. The system was assessed through simulation and laboratory investigation, and real field tests were conducted to certify its validity and correctness. The system can determine the position of the flat wheel and can realize the quantification of the detected wheel flat, which has extensive application prospects.
topic	railway wheel condition monitoring laser collimation wayside measurement
url	https://www.mdpi.com/1424-8220/20/17/4969
work_keys_str_mv	AT rungao inservicedetectionandquantificationofrailwaywheelflatbythereflectiveopticalpositionsensor AT qixinhe inservicedetectionandquantificationofrailwaywheelflatbythereflectiveopticalpositionsensor AT qibofeng inservicedetectionandquantificationofrailwaywheelflatbythereflectiveopticalpositionsensor AT jianyingcui inservicedetectionandquantificationofrailwaywheelflatbythereflectiveopticalpositionsensor
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In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position Sensor

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