旋转激光平面测角精度测试方法研究

空间测量定位系统是一种基于旋转激光平面进行角度交汇定位的网络测量系统,为了对系统测角性能进行评估,提出了一种测角精度测试方法。测试装置以多齿分度台作为角度基准对水平角精度进行检定,垂直角精度则采用解析方法进行估计。首先利用多面棱体、平行光管以及调整机构调整分度台旋转轴和发射站旋转轴平行,再利用千分表调整两旋转轴径向距离,保证两轴的同心度在0.05 mm以内,轴线夹角在10″以内。实验结果表明,系统水平测角精度高于3″,最佳垂直角精度可达1″。该测试方法有效可行。

Verification of angle measuring accuracy for rotating planar laser beams

Workspace Measurement and Positioning System is a type of network measurement system using rotating planar laser beams to realize positioning based on the principle of angle intersection.In order to estimate the system angle measuring performance,a testing method is proposed.In the testing device,a multi-tooth division table is used to establish the reference angle to verify the horizontal angle precision,while the vertical angle precision is evaluated through analytic method.Polygon,collimator and other adjusting mechanisms are used to make the rotation axes of division table and transmitter parallel.Dial indicator is utilized to adjust the radial distance of the two axes.Concentricity of the two axes is within 0.05 mm and inclination angle is less than 10″.The experiment results show that the system horizontal angle accuracy is better than 3″,and the optimal vertical angle accuracy can be 1″.The testing method is effective and feasible.