Intruder detection system
US8354928B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2007 |
| Grant date | Jan 15, 2013 |
| Priority date | — |
| Expiry date | Sep 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2491
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An intruder detection system comprises an illumination means for illuminating a field of view with a modulated optical signal, modulated by a modulation signal; an optical receiver for receiving a delayed reflected signal; a cross correlator for calculating a cross correlation function between the modulation signal and the received delayed reflected signal; and means for detecting changes in the cross correlation function, a change being used to provide intruder detection. This system uses optical sensing and cross correlation calculation to enable an intruder detection signal to be obtained. This can enable a solid state, low cost, and reliable sensor to be provided for detecting intruders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.