METHOD FOR DETECTING WIDTHWISE SHAPE OF STEEL STRIP AND DEVICE THEREFOR

• Main Authors: KIYOFUJI TETSUO, OZEKI KAZUMASA, MATSUKUMA EIJI
• Format: Patent
• Language: English
• Published: 07.02.1995
• Edition: 6
• Subjects: AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; BASIC ELECTRIC ELEMENTS; DEVICES USING STIMULATED EMISSION; ELECTRICITY; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PHYSICS; PUNCHING METAL; TESTING; TRANSPORTING

PURPOSE:To detect a widthwise shape of a steel strip by irradiating the surface of the steel strip having a gloss and running at a high speed with the leaser beam, and by picking up a reflected image of the laser beam. CONSTITUTION:A plurality laser reflecting mirrors 6 are spirally arranged at predetermined intervals on a rotary shaft 5 laid widthwise of a steel strip 1, so as to constitute a laser distributing device 4. A laser beam 3 is emitted from a laser source in parallel with the rotary shaft 5, and accordingly, it is reflected by the mirrors 6 so as to form, on the steel strip 1, spots which are picked up. As a result, a warp widthwise of the steel strip is detected. Accordingly, the laser spots can be distributed crosswise to the steel strip at a high rate without lowering the power density thereof, and accordingly, the diffused reflected light from the spots can be picked up even though the steel strip is glossy, thereby it is possible to precisely detect the widthwise shape of the steel strip.