摘要
为分析几何位置误差对三维激光扫描系统精度的影响,用多体系统运动学建立扫描物镜和被扫描工件关系的误差模型.采用齐次坐标变换描述多体系统两相邻体之间的误差,建立计及误差条件下的位置方程.通过拓扑结构分析,建立三维激光扫描系统的通用误差模型.以某型号四轴激光扫描仪为例进行误差建模及仿真,验证了通用模型的有效性.任意拓扑结构的激光扫描系统均可采用此模型进行几何位置误差的快速建模和分析.
To analyze the effect of geometric position error on the accuracy of three-dimensional laser scanning system, multi-body system kinematics was used to establish the error model between scanning lens and the scanned work piece. The homogeneous coordinate transformation was employed to describe the error relation between two adjacent bodies. The position equation under error conditions was derived, and a versatile error model was further established for general laser scanning systems by topology analysis. The modeling and simulation of a four-axis laser scanner was completed, which verified the effectiveness of the versatile model. Laser scanning systems with any topology can be quickly modeled and analyzed with the proposed model.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2009年第6期108-112,共5页
Journal of Harbin Institute of Technology
基金
黑龙江省自然科学基金资助项目(E200605)
中国博士后基金资助项目(20070420160)
