Study on a new gas pressure sensor based on Fiber Bragg Grating
ZHANG Dengpan
ZHENG Yan
YAO Xinjing
Abstract：A design scheme of Fiber Bragg Grating (FBG)gas pressure sensor based on elastic diaphragm is proposed for multi-point simultaneous measurement on coal seam gas pressure.The sensor adopted the diaphragm and cavity as a whole and the fiber adopted the open-end mode,and the encapsulated sensor was used to do experimental research.Aiming at the temperature-stress cross-sensitivity problem of FBG pressure sensors,the solution of the temperature compensation was studied,and the sensor was calibrated by pressure experiment and temperature experiment.The experimental results show that the temperature sensitivity coefficient of FBG pressure sensor is 27.01 pm/℃ at the pressure range of 0 ～ 10 MPa,the pressure sensitivity coefficient after warming is 251.88 pm/MPa,which is close to the theoretical value.The structure of the sensor can effectively avoid the influence of installation error and hysteresis error and is convenient for achieving multi-point distributed measurement of group chains.
Keywords：gasgas pressureFBGpressure sensordiaphragm
Publication Date：2018-03-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 8-13 )