Patent ID: 6429944
Filing Date: 2002-08-06
Classification: G01B

Abstract:
A process for the determination of a thickness transverse profile and a thickness longitudinal profile of a running strip of material (2) comprising:a) determining with a measuring unit (6) a strip thickness D in at least two measurement areas (22), wherein the measurement areas (22) are arranged at a distance from one another transverse to a direction of travel of the strip, b) determining a longitudinal position (24) of the thickness longitudinal profile longitudinally to the direction of travel of the strip, c) measuring directly the strip thickness D0 in the longitudinal position (24) by the measuring unit (6) and setting the value of a correction value &Dgr;K equal to zero, d) moving the measuring unit (6) transverse to the direction of travel of the strip and determining a size of the movement &Dgr;P in relation to the longitudinal position, e) calculating a gradient k of the strip thicknesses D transverse for the strip travel direction from the strip thicknesses D determined in the measurement areas (22), f) recalculating the correction value &Dgr;K as the sum of the previous correction values &Dgr;K and the product of the gradient k and the size of the movement &Dgr;P, g) calculating a mean strip thickness Dm from the strip thicknesses D determined in the measurement areas (22), h) calculating a corrected strip thickness D0k in the longitudinal position (24) as the sum of the strip thickness Dm and the new correction value &Dgr;K, i) repeating steps d) to h) with an adjustment movement cycle, until the measuring unit (6) has been moved to a maximum movement transverse to the longitudinal position and back again to a position in which the strip thickness D0 in the longitudinal position (24) is measured directly by the measuring unit (6), and j) determining the thickness transverse profile from the repeatedly determined strip thickness Dm and the thickness longitudinal profile from the repeatedly corrected strip thickness D0k.