A diaphragm-type fiber Bragg grating pressure sensor with temperature compensation |
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| Authors: | Jun Huang Zude Zhou Xiaoyan Wen Dongsheng Zhang |
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| Affiliation: | 1. School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan, Hubei, China;2. National Engineering Laboratory for Optical Fiber Sensors, Wuhan University of Technology, Wuhan, Hubei, China |
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| Abstract: | A diaphragm-type fiber Bragg grating (FBG) pressure sensor with two bare FBGs directly bonded on a circular diaphragm along the radial direction has been proposed and studied. Measurement principle and simulation analysis of the pressure sensor are introduced. Using the wavelength shift difference of the two FBGs which respectively measure the positive and negative strain as sensing signal, the pressure sensitivity is increased and the temperature cross-sensitivity is compensated. Experimental results indicate that the measurement sensitivity is 1.57 pm/kPa in a range from 0 to 1 MPa, the correlative coefficient reaches 99.996%, and the temperature compensation performance is distinct. This kind of pressure sensor could be used to measure and monitor the static/dynamic pressure of gas or liquid. |
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| Keywords: | Fiber Bragg grating (FBG) Pressure sensor Temperature compensation |
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