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Proceedings Paper

Research on a wavelength demodulation algorithm in smart clothes based on FBG
Author(s): Huichao Song; Changyun Miao; Cheng Zhang; Hongquiang Li; Fanjie Xu
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Paper Abstract

A wavelength demodulation algorithm in smart clothes for detecting human body temperature is proposed based on the fiber Bragg grating (FBG) sensor interrogation technology. The driven voltage corresponding to peak wavelength of reference spectrum can be calculated by the method of windowing to FBG reflected wave and weighted averaging to the data. The characteristic conic of F-P filter is attained by the least square fitting. Experimental result shows that the algorithm can solve the problem of low detecting precision due to the low resolution of scanning voltage. The correlative linearity of temperature and driven voltage of F-P is 0.998, and a resolution of 0.2oC temperature can be obtained.

Paper Details

Date Published: 24 August 2009
PDF: 7 pages
Proc. SPIE 7381, International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, 73810J (24 August 2009); doi: 10.1117/12.834902
Show Author Affiliations
Huichao Song, Tianjin Polytechnic Univ. (China)
Changyun Miao, Tianjin Polytechnic Univ. (China)
Cheng Zhang, Tianjin Polytechnic Univ. (China)
Hongquiang Li, Tianjin Polytechnic Univ. (China)
Fanjie Xu, Tianjin Polytechnic Univ. (China)


Published in SPIE Proceedings Vol. 7381:
International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors
Xu-yuan Chen; Yue-lin Wang; Zhi-ping Zhou; Qing-kang Wang, Editor(s)

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