摘要
A kind of fiber Bragg grating pressure sensor based on corrugated diaphragm is proposed. The relationship between the central wavelength of reflective wave of FBG and pressure is given, and the expression of the pressure sensitivity coefficient is also given. Within the range from 0 MPa to 0.3 MPa, the experimental pressure sensitivity is 7.83 nm/MPa, which is 2 610 times than that of the bare fiber grating. The experimental results agree with the theoretical analysis. It is indicated that the expected pressure sensitivity of the sensor can be obtained by optimizing the size and mechanical parameters of the corrugated diaphragm.
A kind of fiber Bragg grating pressure sensor based on corrugated diaphragm is proposed. The relationship between the central wavelength of reflective wave of FBG and pressure is given, and the expression of the pressure sensitivity coefficient is also given. Within the range from 0 MPa to 0.3 MPa, the experimental pressure sensitivity is 7.83 nm/MPa, which is 2 610 times than that of the bare fiber grating. The experimental results agree with the theoretical analysis. It is indicated that the expected pressure sensitivity of the sensor can be obtained by optimizing the size and mechanical parameters of the corrugated diaphragm.
基金
NationalNaturalScienceFoundationofChina(6 98770 2 5 )
NationalHigh -technologyDevelopmentProject(2 0 0 2AA31315 0 )
MajorScienceandTechnologyProjectofMinistryofNationalEducation(0 2 190 )
NationalNaturalScienceFoundationofShaanxiProvince(2 0 0 0C3
关键词
光纤布拉格光栅
压力传感器
FBG
灵敏度
皱纹膜片
Guided wave and fiber optics
FBG
FBG sensing
FBG pressure sensing
Pressure sensitivity
