PIR motion sensor
US7755052B2 · kind B2 · utility
14Cited by
16References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 20, 2005 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Jun 6, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/191
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A passive infrared sensor has two detection members established by respective detectors and optical elements, with alternating spatial volumes being monitored by each detection member. No dead space need exist between volumes. The detection members are configured such that a moving object causes the members to output different frequencies, whereas a non-moving stimulus produces the same frequency from both detection members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.