基于视觉和最大长度序列的旋转角度测量系统
CHINA MEASUREMENT & TESTING TECHNOLOGY（2022）
Abstract
针对现有基于视觉的旋转角度测量方法需要在物体旋转轴线方向放置摄像头来获取图像的问题,提出一种基于单目视觉和最大长度序列的旋转角度测量系统.该系统利用摄像头从侧面拍摄柱状旋转体周向的靶标图像实现角位移的测量.首先,该文在介绍最大长度序列的基础上详细描述基于视觉和最大长度序列的平面位移测量方法,包括图像处理、相位检测、序列检测、位移计算等部分.其次,采用双靶标构建0°～360°旋转角度测量系统,提出基于图像拉伸变换的角位移计算方法实现物体旋转角度的测量.最后,为验证系统的有效性进行标定实验及静态特性测试实验.结果表明:在0°～360°测量范围内,设计的角度测量系统非线性误差为0.027％FS,迟滞误差为0.048％FS,重复性误差为0.016％FS,总误差为0.057％FS,分辨率优于0.1°.
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