基于线结构光的零件三维尺寸测量系统

Three-dimensional Measurement System for Parts Based on Line Structured Light

针对原有接触式三维测量技术测量时间长、效率低、对零件有损伤等问题,提出一种基于线结构光的零件三维尺寸测量系统。建立光平面数学模型,采用基于平面靶标的自由移动标定法标定光平面,利用基于Hessian矩阵的Steger方法对线结构光中心提取,通过坐标变换得到零件的三维尺寸。在Visual Studio软件中的Winform窗体应用设计三维测量系统的软件交互界面,搭建实验测量平台进行多个零件的测量实验。实验结果表明,对不同零件三维尺寸测量相误差均小于4%,提出的测量系统及方法具有较高的精度和稳定性,能够满足工程应用。

In order to solve the problems of the original contact three-dimensional measurement technology,such as long measuring time,low efficiency and damage to parts,a three-dimensional measurement system of parts based on line structured light is proposed.The mathematical model of the light plane is established,and the free movement calibration method based on the plane target is used to calibrate the light plane.The Steger method based on Hessian matrix is used to extract the center of the line structured light,and the three-dimensional dimension of the part is obtained by coordinate transformation.The software interface of the three-dimensional measurement system is designed by the Winform form application in the Visual Studio software,and the experimental measurement platform is built to carry out the measurement experiments of many parts.The experimental results show that the phase errors of three-dimensional measurement of different parts are less than 4%.The proposed measurement system and method have high accuracy and stability and can meet engineering applications.