Device for determining the quality of a corrugated board web

A plant for producing a corrugated board web laminated on at least one side, the plant comprising:

• at least one device for producing the corrugated board web laminated on one side;
• and
• at least another device located after the at least one device for producing the corrugated board web laminated on one side, the at least another device comprising a quality determination sensor arrangement, the quality determination sensor arrangement comprising a first quality determination sensor unit and a second quality determination sensor unit, the first quality determination sensor unit facing a first side of the corrugated board web, for determining the quality of the corrugated board web on the first side, the second quality determination sensor unit facing a second side of the corrugated board web opposite the first side of the corrugated board web for determining the quality of the corrugated board web on the second side, the at least another device further comprising an evaluation unit in signal connection with the quality determination sensor arrangement, the evaluation unit evaluating signals of the quality determination sensor arrangement with regard to the quality of the corrugated board web, wherein a calibration arrangement comprises at least one calibration part, arranged at the second quality determination sensor unit, for reflecting a first measuring beam of the first quality determination sensor unit back to the first quality determination sensor unit in an absence of a corrugated board web, wherein the calibration arrangement calibrates the quality determination sensor arrangement, the first quality determination sensor unit and the second quality determination sensor unit being arranged offset from each other, transverse to a transport direction of the corrugated board web, during a calibration process.

A device for determining a quality of a moving corrugated board web with at least one cover web and at least one corrugated web, the device comprising:

• a quality determination sensor arrangement comprising a first quality determination sensor unit and a second quality determination sensor unit, the first quality determination sensor unit facing a first side of the corrugated board web, for determining the quality of the corrugated board web on the first side, the second quality determination sensor unit facing a second side of the corrugated board web opposite the first side of the corrugated board web, for determining the quality of the corrugated board web on the second side;
• and
• an evaluation unit in signal connection with the quality determination sensor arrangement, the evaluation unit evaluating signals of the quality determination sensor arrangement with regard to the quality of the corrugated board web, wherein a calibration arrangement comprises at least one calibration part, arranged at the second quality determination sensor unit, for reflecting a first measuring beam of the first quality determination sensor unit back to the first quality determination sensor unit in an absence of a corrugated board web, wherein the calibration arrangement calibrates the quality determination sensor arrangement, the first quality determination sensor unit being arranged upstream of the second quality determination sensor unit and the second quality determination sensor unit being arranged downstream of the first quality determination sensor unit during a calibration process with respect to a transport direction of the corrugated board web.