High Precise Position Method Based on 2 CCD Cameras in Alternate-Angle Image Acquisition Mode

This paper presents a visual position method for locating both the phone-body and the diaphragm in the automatic diaphragm-assemble device. The visual system is made up of two CCD cameras which are fixed under two corners of the phone-body. Assembling robot takes the diaphragm to the position about 2mm higher than the phone-body with a small angle to ensure that both the corner of the diaphragm and the corner of the phone-body are in the view of the CCD camera. Then the positions and orientations of the phone-body and the diaphragm are calculated by the two corners simultaneously. Both cameras are calibrated twice related to the 2 locating planes for a higher precision. Automatic diaphragm-assemble experiments show that the method is effective.