The Piezometer Based on Fiber Gratings

• Main Authors: Shao-kang Hu, 胡少康
• Other Authors: Shiao-song Bor
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/04956048865355755516

碩士 === 逢甲大學 === 電機工程所 === 94 === Abstract This paper investigates a different configuratings of the piezometer is based on fiber Bragg grating (FBG) encapsulated in a polymer-half-filled metal cylinder. The polymer can be pressurized along one radial direction only, and responds to an axial force on the round plate, creating an axial stretched-strain on the FBG. The measured pressure sensitivity of our proposed the piezometer based on fiber grating is significantly improved compared to that of a bare FBG. The experiment results are in good agreement with theoretical calculations and the linear relationship between the center-wavelength shift of the fiber grating and the applied pressure is confirmed .In the case of keeping the constant size of sensor head, the pezometer based on fiber grating sensitivity can be enhanced by the fiber etching technology. The piezometer based on fiber grating can be extendly applied in the water pressure measurement for obtaining the variation of water level. The piezometer based on fiber grating has the potential to be applied to the measurement of medium pressure, liquid level and depth of water.