Pyroelectric motion detection circuit
US8552376B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2010 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Oct 21, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/40
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A pyroelectric infrared body sensing switch circuit comprises an amplification circuit, a delay unit, an execution unit, and an infrared detection circuit comprising one or more pyroelectric infrared detection elements. A power unit comprises first and second power circuits. Each of the first and second power circuits receives AC power and supplies DC power through RC voltage reduction, full-wave rectification, filtration, and voltage stabilization. The first power circuit supplies power to the execution unit and the second power circuit supplies power to the infrared detection circuit, the amplification circuit, and the delay unit. A signal outputted from the infrared detection circuit is inputted to the amplification circuit. A signal outputted from the amplification circuit controls the activation of the delay unit. A signal output from the delay unit controls the execution unit. The signal outputted from the infrared detection circuit comprises superposed output signals from the pyroelectric infrared detection elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.