20 April 2010 Monitoring the gaps between the platform screen doors and the doors of subway train based on optical time domain reflectrometer
Author Affiliations +
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.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hongtao Zhang, Hongtao Zhang, Zhanxiong Wei, Zhanxiong Wei, Pengfei Wang, Pengfei Wang, LingLing Fan, LingLing Fan, Liang Guan, Liang Guan, Qiming Zhao, Qiming Zhao, Hong-Liang Cui, Hong-Liang Cui, "Monitoring the gaps between the platform screen doors and the doors of subway train based on optical time domain reflectrometer", Proc. SPIE 7677, Fiber Optic Sensors and Applications VII, 767714 (20 April 2010); doi: 10.1117/12.851823; https://doi.org/10.1117/12.851823
PROCEEDINGS
4 PAGES


SHARE
RELATED CONTENT


Back to Top