Development of Plate Flatness Meter Based on Light Section Method on Hot Rolling

Abstract

The hot plate flatness meter has been developed in order to improve yield ratio and quality of products in the plate mill. It consists of an Ar laser, a rotating mirror with eight facets, a TV camera and an image processor, and the principle of measurement is based on the light section method. The plate flatness meter can measure the elongation rate of hot plates even if the temperature is around 1000°C within an average error of 0.04% by using an image processing technique.