Method and apparatus for roll gap measurement and control

Details Method and apparatus for roll gap measurement and control Method and apparatus for roll gap measurement and control

1987-06-05

1989-04-18

Larson, Lowell A.

Metal deforming

With use of control means energized in response to activator...

Including plural sensors or sensor responsive to comparison...

72 21, 72 35, 72 37, B21B 3134, B21B 3708, G01B 1114

Patent

active

048215449

ABSTRACT:
In the method and the apparatus for measuring and controlling the roll gap in a roll stand the roll gap is illuminated by a light source transversely of the roll axis or also parallel to the roll axis. A camera, in particular a CCD line camera, is aligned with its optical system with the roll gap and the illuminated part of the gap is broken down in this camera in the direction of the height or thickness of the gap into image points which generate on illumination an electrical charge, the image points being consecutively periodically interrogated for bright-dark information by drive electronics and the sum of the bright or dark light points serving as information on the magnitude of the roll gap and for controlling the roll gap setting.

REFERENCES:
patent: 4139890 (1979-02-01), Yerkes et al.
patent: 4287402 (1981-09-01), Hentschel et al.
patent: 4527243 (1985-07-01), Loose
patent: 4535614 (1985-08-01), Oka
patent: 4548503 (1985-10-01), Liesch et al.

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