Li Xiaolu, Li Yunye, Xie Xinhao, Xu Lijun
Opt Express. 2018 May 28;26(11):14444-14460. doi: 10.1364/OE.26.014444.
Systematic errors generated from internal misalignments of a lab-built terrestrial laser scanner (TLS) need to be calibrated to improve the positional accuracy of point-cloud. Hence, an angle measurement error model was established by the ray-tracing method involving five types of mounting angle errors, which were estimated by two-face method and network method. Experimental results show that the two errors including mirror tilt error and vertical index offset error are regarded as main systematic errors for lab-built TLS, and consequently the positional accuracy of the point-cloud can be improved in horizontal and vertical directions. The proposed self-calibration method can be used for other TLS by adjusting the angle measurement error model.
实验室构建的地面激光扫描仪（TLS）内部未对准产生的系统误差需要进行校准，以提高点云的位置精度。因此，通过光线追踪方法建立了一个角度测量误差模型，该模型涉及五种安装角度误差，这些误差通过双面法和网络法进行估计。实验结果表明，包括镜面倾斜误差和垂直指标偏移误差在内的两种误差被视为实验室构建的TLS的主要系统误差，因此可以在水平和垂直方向上提高点云的位置精度。通过调整角度测量误差模型，所提出的自校准方法可用于其他TLS。
