光纤光栅称重传感器在大型海上浮吊中的应用

Application of Fiber Bragg Grating Weighing Sensor for Large-Scale Floating Crane

为了实现大型海上浮吊臂架结构健康状态监测,开发了大型海上浮吊光纤光栅称重传感器系统,提出了光纤光栅称重传感器设计理论,建立了传感器设计框架。通过悬臂梁理论,借助于有限元分析软件,提出了悬臂梁和受压弹性体复合结构;通过温度补偿理论与对比,提出了滤波温度补偿方案;通过迟滞效应原理,提出了双光栅式迟滞效应消除方案。进行光纤光栅称重传感器性能实验、反复性实验和稳定实验,讨论了系统的性能和可行性。并将大型海上浮吊光纤光栅实时称重系统应用于实际工程项目,成功实现了大型海上浮吊负重状况监测。

In order to achieve health monitoring of large-scale offshore floating crane structure,we developed a fiber bragg grating weigthing sensor system for large-scale offshore floating crane,proposed a design theory and frame of sensor.Then we proposed a composite structure of cantilever beam and compressive film through analysis of cantilever beam theory and finite element software,a filtering temperature compensation scheme through theory and contrast of temperature compensation,and a hysteresis effect of eradication scheme using double grating through hysteresis effect principle.At last,performance and repeated experiment and stability experiment on fiber bragg grating weighing sensor were conducted to discuss the system performance and feasibility.Finally,fiber bragg grating weighing system for large-scale offshore floating crane was used in actual projects.The result shows that the system achieves health monitoring of loading condition for large-scale offshore floating crane.