基于组合式测量的手持式三维激光扫描系统数学模型

Mathematical model of handheld 3D laser scanning system based on combinatorial measurement

为了解决大尺度空间内复杂物体的形貌尺寸测量问题,提出了一种快速三维数字化精确测量的方法,该方法采用全局测量和终端测量相结合的方式,消除了大型工件整体尺寸大与局部空间复杂的矛盾。首先在分析线结构光测量原理的基础上,提出一种基于局域空间定位的手持式激光扫描测量方法,并构建测量数学模型;其次对手持测量头的空间姿态给出相应的数学建模过程;最后给出完备的组合式三维测量数学模型。该方法可用于各种大范围场景三维精确测量和重构,为三维实体资源快速重构数字化模型提供准确的理论依据。

In order to solve the problem of dimensions measurement of large-scale complex objects,this paper proposes a method of large three-dimensional digital precision measurement.This method solves the complex conflict about large work pieces with local space,according to the global measurement and measuring a combination of terminal.Firstly,this paper presents a handheld laser scanning method based on local spatial orientation and structured light measurement principle,building mathematical measurement model;Secondly,this paper obtains the appropriate mathematical modeling process for the handheld space probe gesture;Finally,we give a complete modular three-dimensional mathematical measurement model.The method can be used for the 3Dprecise measurement and reconstruction of various large-scale scene,provides an accurate theoretical basis for the 3Dentity resource fast reconstructing digital model.