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提出了一种基于双CCD的滚转角测量方法。测量系统包括两部分:移动部分由通过连接杆连接的两个CCD组成,连接杆固接在被测物上;固定部分包括光源、光开关和两个光学准直器,可以得到两路分别以一定角度相交入射到两个CCD上的准直光束。被测物发生滚转变化时,两CCD也同步变化,通过投射在其上的两个光斑位置变化,可求解出滚转角变化。MATLAB仿真证明被测物的各平动变化对滚转角测量无影响,在200″范围内的俯仰和偏摆变化,引起的滚转角测量误差不超过1″。搭建了滚转角测量实验系统,并与HP5529A双频激光干涉仪测量结果进行比对。测量结果表明,在1000″的测量范围内,系统滚转角测量偏差最大不超过1.5″。
A method of measuring roll angle based on double CCD is proposed. The measurement system consists of two parts: the moving part consists of two CCDs connected by connecting rods, the connecting rod is fixed on the measured object; the fixed part comprises a light source, an optical switch and two optical collimators, Intersects the collimated beam incident on both CCDs at an angle. When the measured object roll changes, the two CCDs also change synchronously, and the change of the roll angle can be solved by changing the positions of the two light spots projected on the CCD. The MATLAB simulation proves that the translational changes of the measured object have no influence on the roll angle measurement, and the error of the roll angle measurement caused by the change of pitch and yaw in the range of 200 “does not exceed 1”. Set up a roll angle measurement experiment system, and compared with HP5529A dual-frequency laser interferometer measurement results. Measurement results show that in the 1000 “measurement range, the maximum measurement error of the system roll angle does not exceed 1.5”.