Abstract
Real time 3-dimensional shape measurement is indispensable for online shape control system in steel industries.
No quick and accurate methods, however, have been proposed for time varying objects such as a running hot steel strip.
Moiré Topography is well known as a practical 3-dimensional shape measurement method, but its use has been limited to rest objects at room temperature.
Laser Moiré method, consisting of a Laser light source, a high-sensitive TV-camera and a heat-resisting grating, has been developed to apply Moiré Topography to online measurement in steel industries, and it is reported in this paper.
Using this method, high contrast and stable Moiré fringes were observed even for running hot steel strip at high temperature over 1000°C.
This method has made it possible to realize non-contact observation of the contour map of running hot steel over its total length.
