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:
Aug. 09, 2011
Filed:
Dec. 29, 2008
Martin Wüstefeld, Sexau, DE;
Martin Wüstefeld, Sexau, DE;
Sick AG, Waldkirch, DE;
Abstract
An optoelectronic safety sensor () is set forth for the contactless measurement of paths and/or speeds of the safety sensor () or of a first object connected in a fixed position to the safety sensor () with respect to a second object () moved relatively to the first object, which form a potential source of danger, wherein the safety sensor () has a light source (), a light receiver () with a plurality of light reception elements and has an evaluation unit (), with the evaluation unit () being configured to determine by means of an optical correlation process and/or by evaluation of the optical flow the path and/or the speed from at least two images of a surface structure () of the second object () taken sequentially by the light receiver (). In this respect, the evaluation unit () is further configured to evaluate the quality of the determined path and/or of the determined speed, and a safety output () is provided via which the evaluation signal () can output a shutdown signal or brake signal to secure the danger source when a required quality is not reached.