摘要
提出一种新的基于光纤光栅(FBG)技术的扭矩测量方法.分析了光纤光栅的传感机理,推导了扭矩与中心波长之间的数学关系,建立了双光纤光栅扭矩测量的理论模型.搭建实验平台,采用曲线拟合算法,对实测数据进行分析和处理,该扭矩测量系统的灵敏度达到22.89 pm/(N·m),最大非线性误差为0.23% FS,符合测量系统的误差要求,验证了此种扭矩测量方法的可行性.对温度补偿实验数据的分析表明:半桥式光纤光栅测量方案具有良好的温度补偿特性,能够补偿温度变化引入的测量误差,从而提高测量精度.
The torque measurement method based on fiber Bragg grating （FBG） is proposed. The sensing mechanism of FBG is analyzed, the mathematical relationship between the torque and the center wave- length is developed, and a theoretical model of torque measurement based on double FBG is described. An experimental platform was set up to verify the feasibility of the measurement method. A curve fitting algorithm is used to analyze and process the measured data. The sensitivity of the torque measurement system reaches 22. 89 pro/（N＇m） , and the maximum nonlinear error is 0.23% FS which satisfies the er- ror request of the measurement system. Experimental results illustrate that this method enjoys good tem- perature-compensation characteristics and is able to compensate the torque measurement errors generated out of temperature variation and therefore improves the measurement precision.
出处
《纳米技术与精密工程》
CAS
CSCD
北大核心
2017年第2期135-139,共5页
Nanotechnology and Precision Engineering
基金
国家自然科学基金资助项目(61304246)
关键词
光纤光栅
扭矩测量
误差分析
温度补偿
fiber Bragg grating
torque measurement
error analysis
temperature compensation
