期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII Part B3b
页码：55-60
出版社：Copernicus Publications
摘要：Within this paper an approach of calibration for a terrestrial laser scanner with two mirrors driven by two galvanometers is presented. This includes a mathematical model for the interior of the laser scanner as well as the determination for the parameters to be calibrated. The mathematical model is derived from the functionality of the laser scanner, whereby the principle of "Ray Tracing" was used. According to the inner structure of the scanner device and the functionality of the scanning system the laser ray would be divided into three parts. Every part could be represented by a metric length and a unit vector which could be deduced by using the algorithm in triangular angers and the matrix of reflection respectively. The mathematical model is then the result of combination of these three vectors of laser parts. It was suspected that the lengths of the laser ray and the angles of the mirror rotations were obtained inexactly during measurement. However they could be corrected by adding offsets and factors for the scale caused by not exact orthogonal configuration of the mirror axes. In order to estimate these parameters the adjustment model was established using the Gauss-Markov-Model. Results from the test with simulated data showed that the mathematical model and the adjustment model were adequate to the presented approach
关键词：calibration; terrestrial laser scanner; ray tracing; Accuracy; coordinate system; adjustment
