Non-Contact Butt-Weld Inspection Device
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
A device and method for measuring the degree of planar misalignment between flat plates joined by butt welding are described. The device employs two slit projectors, an imaging device and a computer for processing the image data using a region analysis algorithm. Introduction Reference 1 describes the problem of checking the alignment in butt-welded objects, and a device employing contact sensors to perform such checking. This publication describes a non-contact device which employs machine vision techniques. Apparatus Fig. 1 illustrates the structure of the butt-weld inspection device. It consists of the following principal components: 1) A WORK SURFACE to support the plate being inspected. 2) Two SLIT PROJECTORS producing collimated planes of light which falling on the plate, produce two stripes. 3) An IMAGE SENSOR, e.g.