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Open AccessArticle

A Wide-Range Displacement Sensor Based on Plastic Fiber Macro-Bend Coupling

Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China
Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Sensors 2017, 17(1), 196;
Received: 14 November 2016 / Revised: 17 January 2017 / Accepted: 17 January 2017 / Published: 20 January 2017
(This article belongs to the Section Physical Sensors)
This paper proposes the strategy of fabricating an all fiber wide-range displacement sensor based on the macro-bend coupling effect which causes power transmission between two twisted bending plastic optical fibers (POF), where the coupling power changes with the bending radius of the fibers. For the sensor, a structure of two twisted plastic fibers is designed with the experimental platform that we constructed. The influence of external temperature and displacement speed shifts are reported. The displacement sensor performance is the sensor test at different temperatures and speeds. The sensor was found to be satisfactory at both room temperature and 70 °C when the displacement is up to 140 mm. The output power is approximately linear to a displacement of 110 mm–140 mm under room temperature and 2 mm/s speed at 19.805 nW/mm sensitivity and 0.12 mm resolution. The simple structure of the sensor makes it reliable for other applications and further utilizations, promising a bright future. View Full-Text
Keywords: POF; macro-bend; coupling; displacement sensor POF; macro-bend; coupling; displacement sensor
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Liu, J.; Hou, Y.; Zhang, H.; Jia, P.; Su, S.; Fang, G.; Liu, W.; Xiong, J. A Wide-Range Displacement Sensor Based on Plastic Fiber Macro-Bend Coupling. Sensors 2017, 17, 196.

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