Du Boshi, Lv Yong, Liu Lishuang, Liu Yang
Instrumental Science and Optoelectronic Engineering Faculty, Beijing Information Science & Technology University, Beijing 100192, China.
Sensors (Basel). 2023 Nov 15;23(22):9192. doi: 10.3390/s23229192.
In order to solve the problem of the insufficient range of the traditional fast mirror (FSM) angle measurement system in practical applications, a 2D large-angle FSM photoelectric angle measurement system based on the principle of diffuse reflection is proposed. A mathematical model of the angle measurement system is established by combining the physical properties of the diffuse reflecting plate, such as the rotation angle, rotation center, rotation radius, reflection coefficient and the radius of the diffuse reflecting surface. This paper proposes a method that optimizes the degree of nonlinearity based on this mathematical model. The system is designed and tested. The experimental results show that changing the diffuse reflection surface area can improve the nonlinearity of the angle measurement system effectively. When the radius of the diffuse reflection surface is 3.3 mm, the range is ±20°, the non-linearity is 0.74%, and the resolution can reach up to 2.3″. The system's body is simple and compact. It is also capable of measuring a wider range of angles while linearity is guaranteed.
为了解决传统快速反射镜（FSM）角度测量系统在实际应用中角度测量范围不足的问题，提出了一种基于漫反射原理的二维大角度FSM光电角度测量系统。结合漫反射板的物理特性，如旋转角度、旋转中心、旋转半径、反射系数和漫反射表面半径，建立了角度测量系统的数学模型。本文基于该数学模型提出了一种优化非线性度的方法。对该系统进行了设计与测试。实验结果表明，改变漫反射表面积可以有效改善角度测量系统的非线性度。当漫反射表面半径为3.3毫米时，测量范围为±20°，非线性度为0.74%，分辨率可达2.3″。该系统结构简单紧凑，在保证线性度的同时能够测量更宽的角度范围。
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