Download 68th Conference on Glass Problems by Charles H. Drummond III PDF

By Charles H. Drummond III

This booklet is a cutting-edge number of fresh papers on glass difficulties as provided on the 68th convention on Glass difficulties on the Ohio nation college. issues contain production, glass melters, combustion, refractories, and new advancements.

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To counteract this situation, when there is no reading from the point sensor the software is designed to use 44 ■ 68th Conference on Glass Problems Applications and Challenges for Infrared Temperature Measurement in Glass Manufacturing the last valid emissivity value. Therefore, as long as this glass sheet is of the same type as the sheets before it, a valid emissivity setting is used and a corrected image is displayed. Another challenge is in the area of system cooling. Since the glass sheets have to be heated in the region of 650°C the ambient temperature in the area where the glass leaves the over is obviously quite high.

This is in principal an iterative process and there fore it requires that several glass sheets be processed before an accurate value is returned. Within the system configuration, the operator has an opportunity to enter the expected emissivity of the target. If the value entered is close to the actual value then the correct emissivity can be reached after just one pass. If there is a significant deviance or if no value is entered, it will take several passes before the image is properly corrected.

Typical scanning speeds would be in the 50 to 100 Hz range. Since the glass is moving, each line scanned is incrementally separated from the last line. By combining these images on a PC, a two dimensional false color thermal image is created. Application specific PC software has been developed to allow the user to define zones across the sheet, alarm conditions and to conduct comprehensive data analysis trough a range of databasing and archival tools. Systems of this type have become a key tool in the challenge to provide higher throughput and quality in the glass tempering process.

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