Laser Self-Compensated Measurement for Glass Thickness Process Control in High Temperature Environment

Abstract

This article analysis the characteristic of the actual production of the float glass in the tin bath under the environment. The author use the method of dynamic optical measurement to measure the thickness of the glass. The process use semiconductor as the light source and linear array CCD as the censor to get the data at 600°C. By analyzing large amount of dynamic experiment data and the analysis of the measuring equipment, using edge measuring and pixel subdivision technique on the software, the author have several discussions and come up with some compensate steps towards the effect of the accuracy of the system. Within the effective range of the thickness of glass from 2~20mm, the accuracy of dynamic online measurement can reach 5µm; the accuracy of the statics online measurement is less than 1µm.