Infrared obstacle detection in the presence of sunlight
US6812466B2 · kind B2 · utility
87Cited by
6References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2002 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Oct 31, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/55
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an infrared obstruction detection system, an apparatus is used to detect the presence of ambient light and initiate compensation to minimize the effects of the ambient light on the performance of the system. In one embodiment, the magnitude of the ambient light is measured and an offset proportional to that magnitude is fed to the obstruction detection system such that the data indicative of an obstacle are not obscured. In another embodiment, the apparatus continually monitors the effect of ambient light and adjusts the obstacle detection information during the changing states of the ambient light detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.