Mensi激光扫描仪精度测试方法研究

Study on Precision Testing Method for Mensi Laser Scanner

本文报道了一种新颖的激光扫描仪精度测试方法。采用室内双频激光干涉仪为计量标准,建立了一条高精度室内基线。以扫描仪的定向球作为测量目标,通过对球面拟合获得其球心,以此作为间接测量点,并统计建模前的点位精度。将多个间接测量点与室内基线进行比对,得到了建模后的点位精度,并检验出了扫描仪的尺度因子。合成建模前的点位精度和建模后的点位精度,即为扫描仪的综合点位精度。将本文的研究成果进行拓展,即可应用于其它类型扫描仪的精度测试。

A new precision test method of laser scanner was presented in the paper. A high-precision base line indoor was build using double frequency laser interferometer as the measurement standards. The orientation balls of the laser scanner were adopted as the measurement targets and the spherical centers were calculated by spherical surface fitting. Using the spherical cen- ters as indirect measurement points, the statistics of the pre-modeling positional accuracy was obtained. The post-modeling positional accuracy and the scale factor of the laser scanner were obtained by comparing indirect measurement points with the base line indoor. The pre-modeling and post-modeling positional accuracies were synthesized as the compositive positional accuracy of the laser scanner. This study result can be extended to the precision test of other laser scanners.