基于双线投影与线面约束的3D扫描测量系统研究

发布时间：2018-04-26 06:30

  本文选题：D测量 + 双线投影　； 参考：《红外与激光工程》2017年04期

【摘要】：将双目传感器和线结构光有机地结合到一起,设计了一套能够对大尺寸被测物进行无导轨三维扫描的测量系统。通过标定实现双目传感器与结构光传感器坐标系的统一。提出了一种双线投影模型,实现了双目标记点的立体匹配和标记点传感器坐标的测量。设计了基于线面约束的结构光测量模型,实现了物体表面光条三维信息的获取。采用空间几何相对不变性原则实现标记点传感器坐标和世界坐标的全局匹配,进而确定在测量位置处传感器坐标系与世界坐标系的转换关系。最终将传感器实时扫描测量的物体表面的三维点云数据转换到世界坐标系下,实现对被测物三维的扫描测量,工作距离下扫描测量精度优于0.08 mm。
[Abstract]:The binocular sensor and the linear structured light are combined organically to design a measuring system which can scan the large size object without guide rail. The coordinate system of binocular sensor and structured light sensor is unified by calibration. A bimline projection model is proposed to realize the stereo matching of binocular marker points and the measurement of sensor coordinates. The structure light measurement model based on line and surface constraints is designed, and the 3D information of the light strip on the surface of the object is obtained. The principle of relative invariance of space geometry is used to realize the global matching between the sensor coordinates and the world coordinates, and the transformation relationship between the sensor coordinate system and the world coordinate system at the measuring position is determined. Finally, the 3D point cloud data of the object surface measured by the sensor are converted to the world coordinate system, and the 3D scanning measurement of the object is realized. The precision of scanning measurement is better than 0.08 mm. at the working distance.
【作者单位】： 天津大学精密测试技术及仪器国家重点实验室;
【基金】：国家自然科学基金(51375339)
【分类号】：TH741;TP212
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本文编号：1804906