Optoelectronic sensor
US6943338B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2002 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Jun 4, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.