Multi-sample reading in sleep mode for passive infrared detectors and other analog inputs
US8742901B2 · kind B2 · utility
7Cited by
13References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2011 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Dec 25, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/181
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
This disclosure provides systems and methods for detecting a change in environmental conditions utilizing sampling circuitry configured to sample an environmental sensor while a processor remains in a low-power state or a sleep state. According to some embodiments, a pre-filter performs a simplified analysis of the sensor samples to determine if the processor should wake and perform additional analysis on stored sensor samples. Specific examples are provided for detecting motion using passive infrared detectors. Accordingly, systems and methods for reducing the power consumption of a motion detection system are provided herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.