Reflective fiber-optic angle sensor and its nonlinear compensation technology
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.
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维普
