SHAPE MEASURING METHOD FOR PLANE TO BE MEASURED UNDER ENVIRONMENT WITH SCATTERED SUBSTANCE

摘要

PURPOSE:To measure the shape of a plane to be measured even under bad environmental conditions in an excellent way, by obtaining a signal difference of picture signals from the scanning of two lines to be measured on a plane to be measured with optical beam and processing the signal. CONSTITUTION:Scanning is performed with a laser beam from a laser light source 22 along a line 10 to be measured on a furnace charge plane 30 via a beam scanner 26 and the line 10 is picked up with a TV camera 28. The picture is processed with a signal processor 16 and stored to a scanning converter 32. Similarly, a scanning picture signal of a line 12 to be measured apart from a specific position from the line 12 is given to the scanning converter 32 via a signal processing circuit 20. An output of the circuit 20 is subtracted from the stored signal at a position detection circuit 34 and two-dimensional coordinates (H,V) of a picture where a background image of the line 10 is eliminated are obtained and converted into three-dimensional coordinates of the charge 30 with a microcomputer 36, allowing to obtain the shape in excellent way.