| 摘要 |
PURPOSE:To measure the sizes of plate bodies which travel at high speeds automatically with high accuracy by providing laser beams which detect the preceding ends of the plate bodies under traveling and line sensor cameras which detect the succeeding ends thereof. CONSTITUTION:A laser light emitting device 4 and a photodetector 7 are mounted on the front side of a stand 3, and detecting cameras 10, 11 contg. line sensors 12, 13 are provided on the rear side. Strobe lights 15, 18 are provided so as to face the cameras. A rolled sheet 1 is conveyed at a high speed in an arrow direction, and the preceding end thereof is detected with a laser beam 6. In synchronization with said detection, the lights 15, 18 emit light instantaneously, and the position of the preceding end which shuts off the light emission thereof is detected with the cameras 10, 11. The outputs of the laser photodetector 7 and the cameras 10, 11 are inputted to a processor contg. a computer, by which the size of the sheet 1 is calculated. Therefore the sizes of the rolled sheets which travel at high speeds are measured automatically with high accuracy. |
