3D Scan Method for Measurement of Profile and Its Application
回转体三维扫描形貌测量及其应用

Scan method for measurement of profile with simple setup is proposed. This scan system can be used easily to measure cylindrical object's 3D profile. A laser light-knife is projected onto the surface of object. And this laser light-knife will be twisted or changed according to the profile of object's surface. Then, the CCD and camera will capture and store the scene (frame) into computer. When we rotate the object even speed a lap(360°), while the light-knife is fixed corresponding to the object, a serial of picture including the information of distortion will be recorded into computer. Finally, we get the whole 3D profile of object via assembling the information above mentioned. This is an effective system for measurement of profile. The sensitivity of this system will be arrived at \{0.01mm\} when the yardstick of object is about one hundred millimeters. On the other hand, the image-forming system will be changed accordingly including CCD & lens when we measure other dimension extension. In this paper the experimental result for measuring the profile of complex model is put forward. In the same way, we can obtain other complex surface profile rapidly and successfully. So, this method and system will be widely used in engineering metrical field.