Patent ID: 7726214
Filing Date: 2010-06-01
Classification: B65H

Abstract:
1. Method for the contactless detection of flat objects, such as papers in sheet form with respect to a single sheet, a missing sheet and multiple sheets of said flat objects, said flat objects being placed in a beam path of at least one transmitter (T) and an associated receiver (R) of a sensor device, wherein a radiation transmitted between said at least one transmitter (T) and said receiver (R) is received by said receiver (R) in the form of a measuring signal (U said measuring signal (U wherein a characteristic of an input voltage (U wherein at least one correction characteristic (KK) is provided for evaluation, said correction characteristic (KK) transforms said characteristic of the input voltage (U wherein for said papers in sheet form an approximately linear characteristic approaching an ideal single sheet characteristic with a gradient of approximately “0” is obtained as said target characteristic between an output voltage (U and wherein said sensor device is operated in a switchable manner, in pulsed operation, or continuous operation.