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Proceedings Paper

New method for automatically measuring geometric parameters of wheel sets by laser
Author(s): Qibo Feng; Shinqian Chen
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Paper Abstract

How to automatically and effectively measure geometric parameters and defects of train wheel-sets is a key problem in the maintenance of wheelsets. Currently, there are several methods for this kind of measurements. However, all these methods cannot meet the requirements of high accuracy, low cost, and short measurement periods at the same time. A quite simple and novel method for measuring geometric parameters and defects of wheelsets was proposed in this paper. Most key geometric parameters, such as diameters at any given point of the tread, flange thickness, flange height, rim thickness, rim width, wheel flats, and distance between internal faces etc., can be easily obtained by use of five sets of parallelogram mechanisms together with laser transducers. Wheel-sets are dragged simply by a chain to pass through the measurement system when the measurement results are done, which has totally changed the situation that a measurement platform was required to support a wheelset and makes it rotate in order to take measurements. Methods to calibrate the measurement errors of the system are also discussed, and some in-situ measurement results are given. Experimental results show that the measurement uncertainty within 0.1 mm can be reached by the developed system.

Paper Details

Date Published: 2 September 2003
PDF: 4 pages
Proc. SPIE 5253, Fifth International Symposium on Instrumentation and Control Technology, (2 September 2003); doi: 10.1117/12.521460
Show Author Affiliations
Qibo Feng, Northern Jiaotong Univ. (China)
Shinqian Chen, Northern Jiaotong Univ. (China)

Published in SPIE Proceedings Vol. 5253:
Fifth International Symposium on Instrumentation and Control Technology
Guangjun Zhang; Huijie Zhao; Zhongyu Wang, Editor(s)

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