The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2005
Filed:
Jun. 04, 2002
Kai Waslowski, Emmendingen, DE;
Gerhard Merettig, Sexau, DE;
Siegfried Ringwald, Elzach, DE;
Sick AG, Waldkirch/Breisgau, DE;
Abstract
The invention relates to an optoelectronic sensor, in particular a reflection light scanner, at least comprising a transmitter for transmitting transmitted light, a receiver for outputting at least two received signals in dependence on reflected and received transmitted light, and an evaluation device by which, for determining whether an object or no object is disposed in a detection zone of the sensor, a difference of the received signals is comparable with a threshold and a positive or negative article detection signal can be produced in dependence on the result of this comparison, with a plurality of different thresholds being provided to produce a switching hysteresis. The evaluation device is made such that the result of a comparison of a sum of the received signals with a threshold value is provided as an additional criterion for the production of the article detection signal. The invention further relates to a corresponding method.