关键词: 结构光, 标定, 视觉测量, 摄像机模型

Abstract: According to the principle of 3D vision measurement based on structured light, a non-contact cross structured light sensor was established. In order to derive the 3D coordinates of the sample points on the projection strips, the mathematical model of the sensor was set up and the calibration method of its structural parameters was studied. Using a checkerboard and the camera calibration method proposed by Zhang Zhengyou, the structural parameters of the sensor were calibrated and then verified by measuring experiments, in which the mapping relationship between the 2D image coordinates and the 3D world coordinates of the measured target was determined. As the experimental results showed, the calibration results derived by the method proposed could ensure the realization of the intended 3D measurement function of the sensor and the repeatability accuracy of the normal vector at the drilling position of aircraft surface could meet the inspecting requirements.

Key words: Structured light, Calibration, Vision measurement, Camera model