面结构光在三维测量中的应用技术研究

Research on Application of Surface Structured Light in 3D Measurement

结构光测量技术具有非接触、精度高、速度快、应用广等优点,是三维测量领域中重点发展的方向之一。对比3种不同形式的结构光,采用基于三角法原理的面结构光对待测物体进行三维测量,数据采集得到待测物体单幅点云,通过标志点自动拼接技术及基于ICP原理的拼接技术完成单幅点云数据的粗拼接和精拼接,将拼接后点云数据与理论模型对齐并创建彩图,得到待测物体误差彩图,直观反映待测零件实际状态。利用不同设备对同一零件进行测量,验证了结果的正确性以及测量的高效性,测量因素分析可以有效提高测量效率,减少噪点对测量结果的影响。

The non-contact, high accuracy, fast speed and wide application are advantages of the structured light measurement technology. It is one of the most important directions in the field of 3D measurement. The paper compares three different forms of structured light. Three-dimensional measurement of the object is carried out based on the principle of triangulation. The single point cloud of the measured object is obtained by data acquisition. The rough and fine stitching of single point cloud data is accomplished by automatic stitching of marker points and stitching technology based on ICP principle. By aligning the stitched point cloud data with the theoretical model and creating the color map, we can get the error color map of the measured object. The actual state of the measured object is intuitively reflected. By using different equipment to measure the same part, the correctness of the results and the efficiency of measurement are verified. The measurement factor analysis can effectively improve measurement efficiency and reduce the influence of noise on measurement results.