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:
Dec. 10, 2002
Filed:
Dec. 20, 2000
Daniel Müller, Stein am Rhein, CH;
Hera Rotterdam B.V., Rotterdam, NL;
Abstract
The opto-electronic sensor ( ) for the measurement of the distance (d) to an object ( ), resp., for the identification of an object ( ) within a monitoring zone ( ) is based on triangulation measurement. A light source ( ) emits light onto the object ( ) or into the monitoring zone ( ). The light ( ) scattered by the object ( ) impinges on a receiving element ( ) at an angle (&agr;), which is dependent on distance (d) to the object ( ). The latter has tappings ( ) distributed over its length, in order to by means of a corresponding selection of these bring the measuring range of the sensor ( ) to the value required by a control circuit ( ) and as a result of this to increase the measuring resolution correspondingly. In variable amplifiers ( ), two or more detector signals (I ′, I ′) are multiplied with a variable factor respectively determined by the control circuit ( ) and subsequently added, resp., subtracted in an adding—or subtracting stage ( ). In an evaluation unit ( ), the common signal for the generation of an object identification signal is processed further. The sensor ( ) manifests a low measuring inaccuracy caused by noise and enables a continuous adjustability of the measuring distance (d).