基于FBG的自升式平台爬升齿轮扭矩监测系统设计

为实现对自升式平台爬升齿轮扭矩准确的测量，结合光纤布拉格光栅(Fiber Bragg Grating, FBG)技术的独特优势，研发一种扭矩测量方法。对爬升齿轮扭矩/负载监测研究现状进行分析，根据扭矩测量原理及FBG传感技术，建立双FBG扭矩传感器数学模型。对爬升齿轮扭矩监测系统进行总体设计，对弹性元件进行设计和优化，并构建弹性元件的标定试验平台，对传感器进行标定试验。结果表明，在线性区间内，FBG扭矩传感器的线性度误差为0.780%FS、迟滞误差为2.650%FS、重复性误差为1.202%FS。利用自升式平台齿轮箱原型试验机对爬升齿轮扭矩传感器和弯曲强度进行测试试验，得到传感器静态灵敏度为0.92 pm/t、动态灵敏度为1.02 pm/t。试验结果基本满足对扭矩测量的稳定可靠、精度高、抗电磁干扰等要求。

Design of Torque Monitoring System for Climbing Gear of Jack-up Platform Based on FBG

In order to achieve the accurate measurement of the torque of the climbing gear of the jack-up platform, combining the unique advantages of the Fiber Bragg Grating (FBG) technology, a method of torque measurement is developed. The current research status of the climbing gear torque/load monitoring is analyzed, and the mathematical model of the dual FBG torque sensor is established according to the principle of the torque measurement and FBG sensing technology. The overall design of the climbing gear torque monitoring system is carried out, the elastic element is designed and optimized, the calibration experiment platform of the elastic element is constructed, and the sensor is calibrated. The results show that in the linear interval, the linearity error of the FBG torque sensor is 0.780%FS, the hysteresis error is 2.650%FS and the repeatability error is 1.202%FS. A jack-up platform gearbox prototype testing machine is used to test the climbing gear torque sensor and bending strength. The static sensitivity of the sensor is 0.92pm/t and the dynamic sensitivity is 1.02pm/t. The test results basically meets the requirements of stability, reliability, high precision and anti-electromagnetic interference for torque measurement.