G - Physics – 01 – N
Patent
G - Physics
01
N
340/123.4
G01N 21/27 (2006.01)
Patent
CA 1111925
ABSTRACT OF THE DISCLOSURE A method and apparatus for examining the surface condition of a travelling metal strip in the process of being continuously cast for detection of scarfs. A light emitter projects light beams of short waves or those con- taining said short waves and other waves on a travelling metal strip in the process of being continuously cast. Among the reflections of the projected light beams, only those consisting of short waves are received by the light detector through a filter. A flat hood surrounding a light path extending between the light emitter and light detector is set in a cooling chamber. Compressed air runs through the flat hood to purge the environments of the light path. A signal issued from the light detector is processed by an image memory The shade image of the travelling metal strip is continuously displayed on the screen of a monitor tele- vision set. The surface condition of the travelling metal strip is examined to detect any scarfs. Unlike the prior art the invention is not affected by the presence of steam nor does it rely on visual inspection of the metal strip.
324078
Hanafusa Hideyuki
Ishida Isoshiro
Mihara Toshiro
Seno Kouji
Yamamoto Tomio
Fetherstonhaugh & Co.
Futec Inc.
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