WO2008155769A3 - System and method based on waveguides for the protection of sites - Google Patents

System and method based on waveguides for the protection of sites Download PDF

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Publication number
WO2008155769A3
WO2008155769A3 PCT/IL2008/000835 IL2008000835W WO2008155769A3 WO 2008155769 A3 WO2008155769 A3 WO 2008155769A3 IL 2008000835 W IL2008000835 W IL 2008000835W WO 2008155769 A3 WO2008155769 A3 WO 2008155769A3
Authority
WO
WIPO (PCT)
Prior art keywords
waveguide
light
detectors
waveguides
sites
Prior art date
Application number
PCT/IL2008/000835
Other languages
French (fr)
Other versions
WO2008155769A2 (en
Inventor
Gil Pogozelits
Moti Margalit
Original Assignee
Rafael Advanced Defence Systems Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rafael Advanced Defence Systems Ltd. filed Critical Rafael Advanced Defence Systems Ltd.
Publication of WO2008155769A2 publication Critical patent/WO2008155769A2/en
Publication of WO2008155769A3 publication Critical patent/WO2008155769A3/en

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
    • G08B13/186—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using light guides, e.g. optical fibres

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

A system for monitoring an area comprising at least one waveguide such as an optical fiber having at least one Bragg grating sensor integrated in the waveguide; a plurality of light sources adapted to emit light into both ends of said waveguide; and at least one detector adjusted to detect light at each end of the waveguide,. The Bragg grating sensors may enable sensing at least one type of physical stimuli such as strain or temperature changes by changing at least one feature of the light they reflect, wherein the light sources and detectors may be adapted to be set selectively into operation according to the light detected by the detectors.
PCT/IL2008/000835 2007-06-20 2008-06-19 System and method based on waveguides for the protection of sites WO2008155769A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US92927207P 2007-06-20 2007-06-20
US60/929,272 2007-06-20

Publications (2)

Publication Number Publication Date
WO2008155769A2 WO2008155769A2 (en) 2008-12-24
WO2008155769A3 true WO2008155769A3 (en) 2009-10-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2008/000835 WO2008155769A2 (en) 2007-06-20 2008-06-19 System and method based on waveguides for the protection of sites

Country Status (1)

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WO (1) WO2008155769A2 (en)

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Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
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US5623565A (en) * 1992-06-01 1997-04-22 British Telecommunications Public Limited Company Optical sensor/actuator communication system with common control site independently responding to inputs from sensors and controlling associated actuators
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