Study on Sensitivity-adjustable Fiber Bragg Grating Obliquity Sensor
SUN Wei,LIANG Da-kai,ZENG Jie,FENG Li-hang,YE Ting
Ministry of Education Key laboratory of Vehicle Structure and Control, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China
Abstract：A new sensitivity-adjustable fiber Bragg grating (FBG) obliquity sensor based on the deformation theory of the constant-section beam is described. The obliquity sensor can achieve the measurement of object’s angle by the way that the FBG experiences the deformation of the constant-section beam due to the change of object’s angle,and corresponding FBG obliquity measuring system was set up. Experimental results show that the measuring range is ±35°,the highest sensitivity is 56.93pm/(°),the measurement accuracy is 0.02°,and the sensor sensitivity can be adjusted by altering the size of the constant-section beam.
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2012, Vol. 33 
