反射式光纤角度传感器及其非线性补偿技术

Reflective fiber-optic angle sensor and its nonlinear compensation technology

为了克服传统电子式角度传感器对电磁干扰的敏感性以及在高压环境下取电困难的问题,设计了一种基于反射式光纤技术的新型角度传感器。该传感器采用“以直代曲”的思想,将旋转角度转换为光纤测距问题,通过测量反射光的光照强度并将其转换为电压信号,进而将电压信号转换为角度输出,实现旋转角度的测量。通过最小二乘法对传感器数据进行线性拟合,建立了旋转角度与输出电压之间的映射关系。此外,对传感器的非线性误差进行了有效补偿。实验结果表明:经过非线性误差补偿后,该光纤角度传感器的非线性误差显著降低,从28.55%降低至8.58%,且测量误差仅为2.51°,证明了其高精度和可靠性。

To overcome the problem of sensitivity of traditional electronic angular sensors to electromagnetic interference and the difficulty in power extraction in high-voltage environments,a novel angular sensor based on reflective fiber-optic technology is designed.This sensor employs the concept of"substituting straight for curved"to convert the rotational angle into a fiber-optic ranging problem.By measuring the intensity of the reflected light and converting it into voltage signal,and further converting into an angular output,achieve the measurement of the rotational angle.The data from the sensor is linearly fitted using the least squares method,a mapping relationship between the rotational angle and the output voltage is established.Furthermore,effectively compensate for the nonlinear errors of the sensor is carried out.Experimental results show that after nonlinear error compensation,the nonlinear error of the fiber-optic angular sensor is significantly reduced from 28.55% to 8.58%,with a measurement error of only 2.51°,demonstrating its characteristics of high precision and reliability.