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Proceedings Paper

Monitoring the gaps between the platform screen doors and the doors of subway train based on optical time domain reflectrometer
Author(s): Hongtao Zhang; Zhanxiong Wei; Pengfei Wang; LingLing Fan; Liang Guan; Qiming Zhao; Hong-Liang Cui
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Paper Abstract

Recently, many accidents were reported that some passengers were unfortunately restrained and killed at the gaps between the Platform Screen Doors (PSDs) and the doors of the subway trains. In this paper, one proposal of real time monitoring system based on optical time domain reflectrometer (OTDR) to detect the intrusions at these gaps is presented. In this method the locations and weight of intrusions can be obtained by detecting the abrupt power loss of backscattering light caused by the weight of intrusions upon the microbending sensor heads. This method can be easily multiplexed and extended into a multi-function sensing system, such as monitoring the temperature, smoking and the strains in the tracks, or applied in other fields, such as escalators, board gates for ferries or planes.

Paper Details

Date Published: 20 April 2010
PDF: 4 pages
Proc. SPIE 7677, Fiber Optic Sensors and Applications VII, 767714 (20 April 2010); doi: 10.1117/12.851823
Show Author Affiliations
Hongtao Zhang, L.C. Pegasus (United States)
Zhanxiong Wei, Stevens Institute of Technology (United States)
Pengfei Wang, New York Univ. Polytechnic Institute (United States)
LingLing Fan, Stevens Institute of Technology (United States)
Liang Guan, Stevens Institute of Technology (United States)
Qiming Zhao, Stevens Institute of Technology (United States)
Hong-Liang Cui, New York Univ. Polytechnic Institute (United States)


Published in SPIE Proceedings Vol. 7677:
Fiber Optic Sensors and Applications VII
Alexis Mendez; Henry H. Du; Anbo Wang; Eric Udd; Stephen J. Mihailov, Editor(s)

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