DEVICE FOR DETECTING POSITION AND WIDTH

摘要

PURPOSE:To accurately detect a weld line with a simple constitution by comparing and deciding the change in the quantity of reflected light resulted from the scanning of a spot light. CONSTITUTION:Spot light irradiated from a projecting means I strikes a work 1. The reflected light from the work 1 is received by a light receiving means IVand inputted into a comparing means VI through a signal processing means V. Moreover, a scanning means II is composed of a slider 22 and a motor 20 and the projecting means I and light receiving means IV are simultaneously scanned by the scanning means II. The comparing means VI compares AD conversion data from the signal processing means V with a reference value and detects a weld line.