Cable guided intrusion detection sensor, system and method
US7576648B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 2004 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | Apr 14, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/2886
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides an intrusion detecting system and method for precisely locating an intruder along the length of a sensor cable and for determining the intruder distance from the cable to precisely locate multiple, simultaneously occurring intrusions. The method includes the steps of: generating a TX signal and transmitting same over a first transmission line of the sensor cable, for creating an electromagnetic field; detecting an RX signal induced in a second transmission line of the cable by the electromagnetic field and identifying in the RX signal a contra-directional reflection received from a target and a co-directional reflection received from the far-end of the first transmission line, processing the contra-directional reflection for providing a first coordinate of the target, and processing the co-directional reflection for providing a second coordinate of the target. The method and system may also be implemented with a “true one cable” using a single coaxial cable sensor with a directional coupler for separating coupled signals along a single transmission line in the cable. Ultra high speed data correlation of the RX signal is achieved through use of a field…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.