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Sensors 2016, 16(9), 1508;

A Differential Reflective Intensity Optical Fiber Angular Displacement Sensor

School of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167, China
Key Laboratory of Road Construction Technology and Equipment, Chang’an University, Xi’an 710064, China
Author to whom correspondence should be addressed.
Academic Editors: Manuel Lopez-Amo, Jose Miguel Lopez-Higuera and Jose Luis Santos
Received: 14 July 2016 / Revised: 6 September 2016 / Accepted: 8 September 2016 / Published: 16 September 2016
(This article belongs to the Special Issue Optical Fiber Sensors 2016)
Full-Text   |   PDF [5824 KB, uploaded 16 September 2016]   |  


In this paper, a novel differential reflective intensity optical fiber angular displacement sensor was proposed. This sensor can directly measure the angular and axial linear displacement of a flat surface. The structure of the sensor probe is simple and its basic principle was first analyzed according to the intensity modulation mechanisms. Secondly, in order to trim the dark output voltage to zero, the photoelectric conversion circuit was developed to adjust the signals. Then, the sensor model including the photoelectric conversion circuit has been established, and the influence of design parameters on the sensor output characteristic has been simulated. Finally, the design parameters of the sensor structure were obtained based on the simulation results; and an experimental test system was built for the sensor calibration. Experimental results show that the linear angular range and the sensitivity of the sensor were 74.4 and 0.051 V/°, respectively. Its change rules confirm the operating principle of the sensor well. View Full-Text
Keywords: angular displacement sensor; differential; calibration testing angular displacement sensor; differential; calibration testing

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Jia, B.; He, L.; Yan, G.; Feng, Y. A Differential Reflective Intensity Optical Fiber Angular Displacement Sensor. Sensors 2016, 16, 1508.

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