Performance evaluation of temperature-compensated FBG pressure sensor

Ting Fu; Yuan Gong; Yu Wu; Yun-Jiang Rao; Yao-Yuan Ma; Wen-Qian Niu

doi:10.1117/12.2033673

29 August 2013 Performance evaluation of temperature-compensated FBG pressure sensor

Ting Fu, Yuan Gong, Yu Wu, Yun-Jiang Rao, Yao-Yuan Ma, Wen-Qian Niu

Proceedings Volume 8914, International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography; 89140M (2013) https://doi.org/10.1117/12.2033673
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

A fiber Bragg grating (FBG) sensor packaged with a thin-wall alloy tube for simultaneous measurement of temperature and pressure is proposed. The influence of the structural parameters on the pressure sensitivity is investigated both numerically and experimentally. Experimental results agree well with the simulations. The pressure sensitivities of 7.8 pm/MPa and temperature sensitivity of 20.1 pm/°C are obtained in the measurement range of 0-60 MPa and 0-150°C, respectively. High repeatability and high linearity of the pressure measurement are confirmed by the experiment. By changing the materials with different elastic modulus, the inner diameter and thickness of the alloy tube, the measuring range and sensitivity of the sensor can be further optimized. The sensing performance of the sensor is also compared with a FBG sensor with another packaging structure. Preliminary results indicates that the sensor has good sensing performance and is promising to be used for long-term pressure sensing in harsh environments.

Citation Download Citation

Ting Fu, Yuan Gong, Yu Wu, Yun-Jiang Rao, Yao-Yuan Ma, and Wen-Qian Niu "Performance evaluation of temperature-compensated FBG pressure sensor", Proc. SPIE 8914, International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography, 89140M (29 August 2013); https://doi.org/10.1117/12.2033673

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