论文部分内容阅读
为实现大型回转体空间异面直线角度的自动精确测量,以激光模组为光源,以精密位置测试传感器象限探测器为敏感探测器件,以精密电控转台、多维调节结构为辅助装置,构建了测量系统。通过调节,保证激光出射光路与回转体轴线平行及电控转台轴心与回转体轴线重合。采用公共基准将异面角度映射到同一平面,两象限探测器分别安装于空间异面待测点,其坐标原点与待测点重合。电动转台控制激光光束先后扫描象限探测器坐标原点,光电转换并调理后获得起、止位置信号。最后,通过数据采集和处理,获得空间异面直线角度。在自然照明条件下,对空间角为5°的标准大型回转体进行了自动和手动两种模式的重复实验。实验结果表明,系统在自动模式下的绝对误差均值Δ′为0.005 5°,满足了实际工程对大型回转体空间异面角度的精度需求。
In order to realize the automatic and accurate measurement of the linear angle of the large rotating body, the laser module is used as the light source, the precision quadrant detector is used as the sensitive detection device, the precision electronically controlled turntable and the multi-dimensional adjustment structure are used as auxiliary devices measuring system. By adjusting, it is ensured that the laser exit light path is parallel to the axis of the revolving body and the axis of the electronically controlled turntable coincides with the axis of the revolving body. The public reference is used to map the heterogeneous angles to the same plane. The two-quadrant detectors are respectively installed on the test points with different areas and the origin of the coordinates coincides with the points to be measured. Electric turntable control laser beam scanning quadrant detector coordinates the origin, photoelectric conversion and conditioning obtained after the stop position signal. Finally, through the data acquisition and processing, to obtain the spatial heterogeneous linear angle. Under natural lighting conditions, the experiments were repeated in both automatic and manual modes on a standard large-scale revolving body with a space angle of 5 °. The experimental results show that the mean absolute error Δ ’of the system in automatic mode is 0.005 5 °, which meets the accuracy requirements of the actual project on the large-scale rotating body’s space dissimilarity angle.