Three-Dimensional Vision Sensor for Inspection of Painted Automotive Body Dimensions

Abstract

A three-dimensional vision sensor for inspection of painted automotive body dimensions has been developed. This sensor measures the flushness and gap between adjacent automotive body parts, such as the door and the fender, using the slit light method. In order to restrain the influence of body vibration, a pulsed slit light is projected onto the automotive body. Furthermore, both of the projection strength and width of the pulsed slit light are controlled to obtain constant bright images independently of body colors. Moreover, the optimum thickness of the slit light is selected to improve the quality of the slit light image of the black body with dusts and stains.
The sensor measure the flushness and gap with accuracy of within ±0.1mm in measurement experiments using white and black automotive bodies and therefore proved effective for the inspection of painted automotive body dimensions.