Patent ID: 6521906
Filing Date: 2003-02-18
Classification: D06H

Abstract:
Method of measuring a distortion angle between a longitudinal extent of weft threads or rows of stitches in a textile strip that is being continuously transported in a transporting apparatus and perpendicular to the transport direction, comprising the steps of:individually interrogating, by means of a lighting arrangement, a photoelectric sensor arrangement with a plurality of sensor elements, so as to obtain discrete light-dark sampling values, processing the sampling values with an evaluation device to obtain the distortion angle, wherein the sensor arrangement comprises an arrangement of sensor elements comprising a plurality of rows and columns, in which individual elements thereof can be accessed as desired, and interrogating different predetermined groups of sensor elements in a sequence of scanning steps, each group being situated substantially on a sensor-field line, wherein the groups involved in each scanning step are determined such that scanned sensor-field lines are positioned at progressively altered angles with respect to the transport direction.