俯仰角组合测量系统的设计  

Design of combination measurement system for pitching angles

作　　者：潘明华[1] 文香稳[1] 朱国力[1] 

机构地区：[1]华中科技大学数字制造装备与技术国家重点实验室,湖北武汉430074

出　　处：《光学精密工程》2011年第3期598-604,共7页Optics and Precision Engineering

基　　金：国家973重点基础研究发展规划资助项目(No.2007CB714005)

摘　　要：利用准直激光、单轴倾角仪和CCD摄像机建立了一种俯仰角组合测量系统以提高俯仰角测量的精度和稳定性。首先,给出了俯仰角组合测量模型,基于坐标旋转算法和迭代方法研究了俯仰角的组合测量原理。然后,采用蒙特卡罗法对影响组合测量系统精度的各个因素进行了全局灵敏度分析。结果表明,与目前工程测量中普遍采用的倾角仪直接测量俯仰角法相比,组合测量法能够获得更高的测量精度和稳定性。利用高精度三轴转台进行的俯仰角测量实验表明:±8°测量范围内,组合测量法误差绝对值最大为0.3 mrad,标准差为0.16 mrad。理论分析和实验结果证明,提出的组合测量法有效地提高了俯仰角测量精度和稳定性,适合工程上的测量需要。A combination measurement system for pitching angles was put forward based on a collimated laser, a single-axis inclinator and a CCD camera to improve the precision and stability of measuring pitching angles in engineering. The combination measurement model was introduced and its combination measurement principle was studied in detail on the basis of the coordinate rotation algorithm and the iteration method. The global sensitive analysis of each factor affecting the combination measurement was carried out by using Monte Carlo method. Obtained results show that compared with the direct measurement method with an inclinator widely used in pitching angle measuring at present, the proposed method can obtain much higher measurement precision and stability. A measurement experiment on a highly accurate three-axis turntable was performed, which indicates that the maximum absolute error is 0.3 mrad and the standard deviation is 0.16 mrad. These data are better than that from the direct measurement method with the inclinator,and meet the requirements of the engineering applications

关 键 词：俯仰角测量 CCD摄像机 组合测量 蒙特卡罗法 

分 类 号：TB92[一般工业技术—计量学] TP212.12[机械工程—测试计量技术及仪器]