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Journal of Sensors
Volume 2012 (2012), Article ID 750261, 5 pages
http://dx.doi.org/10.1155/2012/750261
Research Article

Health Monitoring for Coated Steel Belts in an Elevator System

1Department of Instrument Science & Engineering, Shanghai Jiaotong University, Shanghai 200204, China
2School of Electrical, Electronic & Computer Engineering, University of Newcastle, Newcastle NE1 7RU, UK

Received 30 November 2011; Accepted 13 February 2012

Academic Editor: B. P. C. Rao

Copyright © 2012 Huaming Lei et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a method of health monitoring for coated steel belts in an elevator system by measuring the electrical resistance of the ropes embedded in the belt. A model on resistance change caused by fretting wear and stress fatigue has been established. Temperature and reciprocating cycles are also taken into consideration when determining the potential strength degradation of the belts. It is proved by experiments that the method could effectively estimate the health degradation of the most dangerous section as well as other ones along the whole belts.