Abstract: Improved infrared camera system better enables furnace burden surface temperature measurements and temperature profile measurements and displays of such measurements to be made at various stocklines. An infrared data processing system is incorporated with the camera system which provides automatic acquisition, validation and preprocessing of thermal images from an infrared camera, defines and extracts key features of the thermal images, provides automatic classification and storage of thermal images, periodically reports on displays and printer burden temperature information, and provides convenient data retrieval and data archiving capability. The invention may be incorporated in new or existing methods and apparatus.

Abstract: Repetitive defect signals are produced, for example, by bar or rod inspection equipment whenever any one of plural roll sets in a rolling mill develops a roll crack. Defect signal repetitive rate differs for each roll's relative speed. Selective correlator electronics process the defect signals with plural repetitive rates and produce an output signal indicative of which roll set in the mill has a cracked roll.