Teaching Equipment Design For 3D Visual Measurement

3D Visual Measurement is a very important part of the teaching of undergraduateand master whose majors are measurement related. But in most domestic universities,there are no supporting experiments. In this paper, four related and successiveexperiments are designed in one experimental platform in order to help studentscomprehend and master 3D vision inspection technique exactly. The four experimentsare monocular camera calibration with Tsai's method, binocular camera unificationcalibration, binocular camera calibration with Zhang's method and binocular visualhole diameter measurement.According to the main content of 3D visual measurement, four experimentsincluding knowledge mentioned above are designed. The geometric location andstructure of the system are presented, whose main components are CCD camera,line-structured laser, precise translation stage, drones and laser power supplygenerator. Laser power supply generator is developed to control the brightness of theline-structured laser by software. A directional drone is designed for Zhang'scalibration method and related image processing methods are studied. The calibrationand measurement software are coded.The equipment had already been used in experiment teaching. Students showedgreat interests and finally mastered fundamental content in vision inspectiontechnique through series experiments. Teaching results prove that the experimentalplatform is portable, easy to operate and expansible. It's suited to promote inuniversities.