METHOD OF PHOTOGRAPHING OVERALL WIDTH OF HOT-ROLLED METAL BAND USING NEAR INFRARED CAMERA IN HOT ROLLING AND METHOD OF RECORDING PHOTOGRAPHED RESULT OF OVERALL WIDTH

摘要

PROBLEM TO BE SOLVED: To provide a method of photographing overall width of a hot-rolled metal band and a method of recording the photographed result of the overall width photographed result by which quality assurance in view of delivery to customers is properly performed.;SOLUTION: When performing temperature measurement by photographing a material 8 to be rolled by installing near infrared cameras with which the overall width of the hot-rolled metal band can be photographed in at least one or more places of the inlet side of a coiler 24 in a hot rolling line 100, the middle of a run out table 23 and the outlet side of a finishing mill 18, it is stored that what is beforehand determined how the relationship between the brightness measured with the near infrared camera and temperature measuring with a spot thermometer about the same places of the same heat source is changed when changing the temperature of the heat source to change when changing the temperature of the heat source as a brightness-temperature transformation curve. The brightness when photographing the material to be rolled by installing the near infrared camera on the hot rolling line is transformed into temperature according to the brightness-temperature transformation curve.;COPYRIGHT: (C)2009,JPO&INPIT