Simultaneous measurement of temperature and pressure by a single fiber Bragg grating with a broadened ref lection spectrum

被引：43
作者：
Guo, T
Qiao, XG
Jia, ZN
Zhao, Q
Dong, XY
机构：
[1] Nankai Univ, Inst Modern Opt, Tianjin 300071, Peoples R China
[2] Xian Shiyou Univ, Sch Sci, Xian 710065, Peoples R China
来源：
APPLIED OPTICS | 2006年 / 45卷 / 13期
关键词：
D O I：
10.1364/AO.45.002935
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Simultaneous measurement of temperature and pressure with a single fiber Bragg grating (FBG) based on a broadened reflection spectrum is proposed and experimentally demonstrated. A novel double-hole structure of a cantilever beam is designed, and a FBG is affixed on the nonuniform strain area of the cantilever beam. The Bragg reflection bandwidth is sensitive to the spatially gradient strain but is free from the spatially uniform temperature. The wavelength peak shift and the bandwidth broadening of the FBG with a change of temperature and pressure allow for simultaneous discrimination between the temperature and the pressure effects. Standard deviation errors of 1.4 degrees C and 1.8 kPa were obtained with temperature and pressure ranges of 20 degrees C-100 degrees C and 0-80 kPa, respectively. This novel and low-cost sensor approach has considerable potential applications for temperature-insensitive strain measurement. (c) 2006 Optical Society of America.
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收藏
页码：2935 / 2939
页数：5
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