Accurate measurement of the stain variation and effective distinguishment of the temperature-induced stress from the load-induced stress have been major objectives for strain sensors in crane monitoring. In this paper, a fiber Bragg grating (FBG) strain sensor with low temperature-sensitivity, packaged by two gripper tubes and stainless-steel tubes, is presented and applied in a bridge crane health monitoring project. Calibration experiments and reliability tests are conducted to evaluate the stain transferring characteristics of the sensors in a laboratory environment. On the other hand, the on-site tests show that these FBG strain sensors have the advantage of precision, reliability, and applicability. Meanwhile, the low temperature-sensitivity nature of the sensors is verified by the test results, which shows its promising potential in the health monitoring for a bridge crane.

中文翻译：

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基于低温敏感FBG传感器的桥式起重机结构健康监测

应变传感器在起重机监测中的主要目标是准确测量应变变化以及有效区分温度引起的应力和载荷引起的应力。在本文中，提出了一种具有低温度敏感性的光纤布拉格光栅（FBG）应变传感器，由两个夹具管和不锈钢管封装，并应用于桥式起重机健康监测项目。进行校准实验和可靠性测试以评估传感器在实验室环境中的污点转移特性。另一方面，现场测试表明，这些FBG应变传感器具有精度、可靠性和适用性等优点。同时，通过测试结果验证了传感器的低温敏感性，