Moisture detecting system using semiconductor light sensor with integral charge collection
US6469291B2 · kind B2 · utility
4Cited by
70References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2001 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Sep 18, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J1/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Moisture detection permits moisture removal equipment, such as automotive windshield wipers and defogger systems, to be operated automatically. A system for detecting moisture on a surface includes a light emitter directed at the surface. The presence of moisture is based on the intensity of light from the emitter reflected by the surface and received by a light sensor. The light sensor accumulates charge in response to incident light over a variable integration period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.