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Online health monitoring and safety evaluation of the relocation of a research reactor using fiber Bragg grating sensors

机译：使用布拉格光纤光栅传感器对研究堆进行搬迁的在线健康监测和安全评估

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摘要

This paper demonstrates the reliability and accessibility functions of fiber Bragg grating (FBG) sensors in a radiation structural health monitoring and safety evaluation application. FBG sensors, dial gages and conventional resistance strain gages (RSGs) were attached to the temporary H-beam frame, and distributed below the path of the rail tracks for online safety measurements during the process of moving the structure of the research reactor. The results showed the high level of performance of the FBG sensors for an online structural health monitoring system. The measurement data from the FBG monitoring system were comparable to the theoretical calculation results and the FEM simulations as the movement progressed. The result of this investigation also clearly demonstrates that FBG sensors can overcome the harsh environments of electric and magnetic interference, while conventional RSG sensors are subject to serious fluctuations providing useless feedback.
机译：本文演示了光纤布拉格光栅（FBG）传感器在辐射结构健康监测和安全评估应用中的可靠性和可访问性功能。 FBG传感器，千分表和常规电阻应变计（RSG）固定在临时H型钢框架上，并分布在铁轨路径下方，以便在移动研究堆结构的过程中进行在线安全测量。结果表明，用于在线结构健康监测系统的FBG传感器具有很高的性能。随着运动的进行，FBG监控系统的测量数据可与理论计算结果和FEM仿真相媲美。这项调查的结果也清楚地表明，FBG传感器可以克服恶劣的电磁干扰环境，而传统的RSG传感器会受到严重的波动，从而提供了无用的反馈。

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