旋转体表面轮廓测量的激光多普勒信号研究  

Study on Doppler Signal of Outline Measurement of Revolving Object Surface

作　　者：贺顺忠[1] 刘金凤[1] 蒋诚志[1] 陈林才[1] 姚欣[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院测试计量技术及仪器国家重点实验室,天津300072

出　　处：《中国激光》2004年第2期215-218,共4页Chinese Journal of Lasers

基　　金：博士点基金资助课题

摘　　要：在利用激光多普勒效应对旋转体表面轮廓损伤进行测量时 ,其散射光的多普勒信号强度及质量是影响测量精度的极其重要的参数。研究了激光多普勒参考光技术、旋转体表面散射光位相无规则变化的平均效应和最小二乘法曲线拟合技术 ,设计出高信噪比的参考光路 ,并对物体表面细微结构所引起的信号丢失进行了重构 ,实现了旋转体表面轮廓损伤的测量 ,其相对误差约 0 3%。When the outline injury measurement of revolving object surface is carried out utilizing laser Doppler effect, intensity and quality of Doppler signals of the diffused light are essential parameters affecting measurement and its accuracy. In this paper, the laser Doppler reference optical system, average effect of diffused light phase random change of revolving object surface and least square fit method are studied, and a reference optical system with high signal noise ratio is designed, besides the loss signals arising from subtle structure of object surface are restructured, outline injury measurement of revolving object surface is attained with the relative error of 0.3%.

关 键 词：精密工程测量 表面轮廓测量 激光多普勒效应 最小二乘法曲线拟合 

分 类 号：TN247[电子电信—物理电子学]