Motion detector with improved signal discrimination
US5309147A · kind A · utility
17Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | May 21, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/19
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An infrared motion detection device for detecting the presence of a target object including special circuitry for reducing false alarms. In particular, coupling circuitry is interposed between signal processing circuitry and comparator circuitry, which serves to match the baseline level of the signal from the signal processing circuitry with the baseline level of a threshold or thresholds defined by the comparator circuitry. The coupling circuitry may be implemented in a particularly simple manner, which reduces the manufacturing cost of the circuitry and the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.