Abstract
This paper demonstrates the reliability and accessibility functions of fiber Bragg grating(FBG) sensors in a radiation structural health monitoring and safety evaluationapplication. FBG sensors, dial gages and conventional resistance strain gages(RSGs) were attached to the temporary H-beam frame, and distributed belowthe path of the rail tracks for online safety measurements during the process ofmoving the structure of the research reactor. The results showed the high level ofperformance of the FBG sensors for an online structural health monitoring system. Themeasurement data from the FBG monitoring system were comparable to thetheoretical calculation results and the FEM simulations as the movement progressed.The result of this investigation also clearly demonstrates that FBG sensors canovercome the harsh environments of electric and magnetic interference, whileconventional RSG sensors are subject to serious fluctuations providing useless feedback.
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