Application of Fiber Bragg Grating Sensor in A National Scientific Device

Abstract

Using fiber bragg grating(FBG) sensor to monitor the strain of connecting bar, which connects the Acrylic sphere and steel structure in central detector of a national scientific device. The stability and static parameters of FBG sensor had been tested before calibration. Experimental results show that Linearity Coefficient is above 0.9999, Linear Error is less than 0.75%, Repeatability and Hysteresis Errors are less than 0.50%, the maximum Synthetic Error is 0.90%. And the stability and durability can meet the engineering demand of strain monitoring for the central detector. The monitoring system can meet the long-term health monitoring requirements. The experiment testing accumulates construction experience for connecting bar stress detection.