CAJ | 학술논문

线结构光扫描测头在逆向工程中应用广泛，其测量精度对3D 重建可靠性有重要影响。本文建立了基于光学三角法的线结构光扫描测头数学模型，由坐标转换和透视成像原理实现二维像素坐标与三维世界坐标间转换。分析了线结构光扫描测头结构参数对测量精度的影响，推导出测量误差模型。分析了漫反射光强度变化对结构参数的影响，结合实际设计需要给出边界约束条件，并仿真实现结构参数优化设计，误差低于0．02mm。
선결구광소묘측두재역향공정중응용엄범，기측량정도대3D 중건가고성유중요영향。본문건립료기우광학삼각법적선결구광소묘측두수학모형，유좌표전환화투시성상원리실현이유상소좌표여삼유세계좌표간전환。분석료선결구광소묘측두결구삼수대측량정도적영향，추도출측량오차모형。분석료만반사광강도변화대결구삼수적영향，결합실제설계수요급출변계약속조건，병방진실현결구삼수우화설계，오차저우0．02mm。
Line structured light scanning probe is widely used in reverse engineering,its measurement precision and reliability have an important influence on 3D reconstruction.This paper establishes mathematical model of line structured light scanning probe based on optical triangulation method.The transformation between imaging pixel coordinates and three-dimensional world coordinate is achieved by coordinate transformation and perspective imaging principle.The influence on measurement accuracy of structured light scanning probe structure parameters is analyzed and the measurement error model is derived.The effect of diffuse light intensity on structural parameters is analyzed and boundary conditions are de-termined by actual design needs.Simulation on optimization design of structural parameters displays an error less than 0. 02mm.