Apparatus and method for monitoring a spatial area, in particular for safeguarding a hazardous area of an automatically operated installation
US8224032B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2008 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Sep 2, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/89
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for monitoring a spatial area, in particular for safeguarding a hazardous area of an automatically operated installation, comprises an illumination device which at least temporarily emits light signals into the spatial area. A first image recording unit records a first image of the spatial area. The first image recording unit comprises an image sensor having a plurality of pixels. An evaluation unit determines a distance value for at least one spatial area point, which is located in the spatial area and is imaged on at least one pixel, by means of a propagation type measurement. The propagation type measurement suffers from a limited unambiguity range. Therefore, a test device is designed to check the distance value by means of a reference distance value determined from a second image of said spatial area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.