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
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WO
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Patent type
Prior art keywords
waveguide
light
system
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.)
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Publication date

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    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00Burglar, theft or intruder alarms
    • G08B13/18Actuation by interference with heat, light or radiation of shorter wavelength; Actuation by intruding sources of heat, light or radiation of shorter wavelength
    • G08B13/181Actuation 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
    • G08B13/183Actuation 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
    • G08B13/186Actuation 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

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 WO2008155769A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US92927207 true 2007-06-20 2007-06-20
US60/929,272 2007-06-20

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

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PCT/IL2008/000835 WO2008155769A3 (en) 2007-06-20 2008-06-19 System and method based on waveguides for the protection of sites

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WO (1) WO2008155769A3 (en)

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