METHOD AND DEVICE FOR THE CONTACTLESS DETECTION OF

专利名称：METHOD AND DEVICE FOR THE

CONTACTLESS DETECTION OF PLANAROBJECTS

发明人：SCHOEN, DIERK申请号：EP04804234.5申请日：20041222公开号：EP1701902B1公开日：20140709

摘要：The invention relates to a method and a device for the contactless detection ofplanar objects, particularly in the form of sheets, such as paper, films, metal sheets, andsimilar planar materials or packagings. The aim of the invention is to make it possible toreliably and accurately detect single sheets, missing sheets, or multiple sheets, especiallydouble sheets, of the planar objects, in methods and devices used in the printing industry,for example. Said aim is achieved by a method and device that are very flexible and can beused across a great grammage range or surface density range, at least one characteristiccurve being preset for the evaluation unit that is mounted downstream of the sensordevice, particularly the receiver. Said characteristic curve is used for recreating thecharacteristic curve of the input voltage of the test signal in the receiver as a targetcharacteristic curve according to the grammage or the surface density of the planarobjects such that a linear or nearly linear dependence or a characteristic curve

approaching the ideal characteristic curve for recognizing the single sheet is obtained asa target characteristic curve. In order to improve the reliability of detection and furtherincrease the spectrum of materials to be used compared with a sensor utilized according

to the corrective characteristic curve method, a combination of sensors and sensordevices are additionally provided.

申请人：PEPPERL + FUCHS GMBH,PEPPERL & FUCHS,PEPPERL + FUCHS GMBH

地址：DE

国籍：DE

代理机构：Heim, Hans-Karl

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