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Proceedings Paper

Temperature-insensitive load sensor with a single fiber Bragg grating
Author(s): Limin Hu; Xinyong Dong; Chunliu Zhao; Shuqin Zhang; Shangzhong Jin
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Paper Abstract

A simple novel load sensor has been demonstrated by embedding a uniform fiber Bragg grating (FBG) along the axis of a tapered cylindrical polymer rod. Due to the load-induced nonuniform strain field applied along the length of the FBG, the bandwidth of its reflection spectrum varies linearly with the applied load. By measuring the reflected optical power of the chirped FBG illuminated by a flattened broadband light source, temperature-insensitive measurement of load is realized. It is intensity-modulated so that complex wavelength interrogation system is avoided in the sensor system. In the experiment, the achieved sensitivity is 0.99 nW/N over a range from 0 to 43.12 N. Since the FBG is well protected by embedding in the tapered elastic polymer rod, excellent reliability is expected.

Paper Details

Date Published: 9 November 2010
PDF: 6 pages
Proc. SPIE 7853, Advanced Sensor Systems and Applications IV, 78532W (9 November 2010); doi: 10.1117/12.870247
Show Author Affiliations
Limin Hu, China Jiliang Univ. (China)
Xinyong Dong, China Jiliang Univ. (China)
Chunliu Zhao, China Jiliang Univ. (China)
Shuqin Zhang, China Jiliang Univ. (China)
Shangzhong Jin, China Jiliang Univ. (China)

Published in SPIE Proceedings Vol. 7853:
Advanced Sensor Systems and Applications IV
Brian Culshaw; Yanbiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan; Lin Zhang, Editor(s)

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