Acta Optica Sinica, Volume. 30, Issue 7, 1965(2010)
Simplified Time-Dependant Optical-Mechanical Transformation Equation for FBG Strain Sensors
Based on the basic principle of fiber optical Bragg grating (FBG) strain sensing and the basic theory of viscoelastic mechanics,a simplified time-dependant optical-mechanical transformation equation for FBG sensors is established. With the viscoelastic mechanic behavior of encapsulation matrix and optical fiber core being neglected and the elastic-viscoelastic mechanic coupling mechanism among environment-encapsulation matrix-adhesion layer-optical fiber core being taken into account,the equation hereby established contains all the characteristic geometric and mechanical parameters of a sensor,and can greatly simplify the process of optical-mechanical transformation analysis,thereby more reliable and less complicated for long-term performance analysis of FBG sensors when applied to health monitoring of large project.
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Wu Yonghong, Shao Changjiang, Qu Wenjun, Zhou Wei, Cai Haiweng. Simplified Time-Dependant Optical-Mechanical Transformation Equation for FBG Strain Sensors[J]. Acta Optica Sinica, 2010, 30(7): 1965
Category: Fiber Optics and Optical Communications
Received: Aug. 24, 2009
Accepted: --
Published Online: Jul. 13, 2010
The Author Email: Yonghong Wu (wuyonghonghao@yahoo.com.cn)