GB2015844A - A device for detecting the presence of an object - Google Patents

A device for detecting the presence of an object

Info

Publication number
GB2015844A
GB2015844A GB7903921A GB7903921A GB2015844A GB 2015844 A GB2015844 A GB 2015844A GB 7903921 A GB7903921 A GB 7903921A GB 7903921 A GB7903921 A GB 7903921A GB 2015844 A GB2015844 A GB 2015844A
Authority
GB
United Kingdom
Prior art keywords
fibre
pulse
detecting
distortion
intensifies
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB7903921A
Other versions
GB2015844B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent SAS
Original Assignee
Compagnie Generale dElectricite SA
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 Compagnie Generale dElectricite SA filed Critical Compagnie Generale dElectricite SA
Publication of GB2015844A publication Critical patent/GB2015844A/en
Application granted granted Critical
Publication of GB2015844B publication Critical patent/GB2015844B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
    • B61L1/02—Electric devices associated with track, e.g. rail contacts
    • 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled

Abstract

A device for detecting the presence of an object. The device includes an optical fibre (7) which may be buried under a railway line 4 to be monitored, a coherent light pulse generator which injects a pulse into an end of the fibre, and a receiver which receives the pulse backscattered by the fibre. The fibre 17 has a corrugated sheath 16 (16) which intensifies the effect of local distortion on the fibre, thereby allowing measurement and detection of the position of the distortion of the fibre. <IMAGE>
GB7903921A 1978-02-28 1979-02-05 Device for detecting the presence of an object Expired GB2015844B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7805663A FR2418506A1 (en) 1978-02-28 1978-02-28 DEVICE FOR DETECTING THE PRESENCE OF AN OBJECT ALONG A LINE

Publications (2)

Publication Number Publication Date
GB2015844A true GB2015844A (en) 1979-09-12
GB2015844B GB2015844B (en) 1982-06-03

Family

ID=9205152

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7903921A Expired GB2015844B (en) 1978-02-28 1979-02-05 Device for detecting the presence of an object

Country Status (7)

Country Link
BE (1) BE873985A (en)
CH (1) CH627573A5 (en)
DE (1) DE2906841A1 (en)
FR (1) FR2418506A1 (en)
GB (1) GB2015844B (en)
IT (1) IT1118351B (en)
NL (1) NL7901615A (en)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4482890A (en) * 1981-01-22 1984-11-13 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Weight responsive intrusion detector using dual optical fibers
US5357813A (en) * 1991-10-17 1994-10-25 The State Of Israel, Ministry Of Defence Pressure sensor
US5462244A (en) * 1992-09-25 1995-10-31 N.V. Nederlandse Spoorwegen System for detecting trains
WO2003025524A1 (en) * 2001-09-19 2003-03-27 Gebert Ruediger Heinz Weight sensor
NL1020997C2 (en) * 2002-07-04 2004-01-13 Lightspeed Inv S B V Engaging means for a signal line, signal line and construction element.
NL1024456C2 (en) * 2003-10-06 2005-04-07 Lightspeed Inv S B V Signal line, fence and method for manufacturing a fence.
US7656535B2 (en) 2004-12-17 2010-02-02 British Telecommunications Public Limited Company Optical system and method for inferring a disturbance
US7667849B2 (en) 2003-09-30 2010-02-23 British Telecommunications Public Limited Company Optical sensor with interferometer for sensing external physical disturbance of optical communications link
US7697795B2 (en) 2005-03-04 2010-04-13 British Telecommunications Public Limited Company Acoustic modulation
US7755971B2 (en) 2005-03-04 2010-07-13 British Telecommunications Public Limited Company Sensing system
US7796896B2 (en) 2003-09-30 2010-09-14 British Telecommunications Plc Secure optical communication
US7817279B2 (en) 2006-02-24 2010-10-19 British Telecommunications Public Limited Company Sensing a disturbance
US7848645B2 (en) 2004-09-30 2010-12-07 British Telecommunications Public Limited Company Identifying or locating waveguides
US7961331B2 (en) 2006-02-24 2011-06-14 British Telecommunications Public Limited Company Sensing a disturbance along an optical path
US7995197B2 (en) 2004-09-30 2011-08-09 British Telecommunications Public Limited Company Distributed backscattering
US8000609B2 (en) 2005-04-14 2011-08-16 British Telecommunications Public Limited Company Communicating or reproducing an audible sound
US8003932B2 (en) 2005-06-02 2011-08-23 British Telecommunications Public Limited Company Evaluating the position of a disturbance
US8027584B2 (en) 2006-02-24 2011-09-27 British Telecommunications Public Limited Company Sensing a disturbance
US8045174B2 (en) 2004-12-17 2011-10-25 British Telecommunications Public Limited Company Assessing a network
US8396360B2 (en) 2005-03-31 2013-03-12 British Telecommunications Public Limited Company Communicating information
US8670662B2 (en) 2006-04-03 2014-03-11 British Telecommunications Public Limited Company Evaluating the position of an optical fiber disturbance
EP2804166A1 (en) 2013-05-13 2014-11-19 PSS Consultancy & Equipment B.V. Sensor cable and system

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4297684A (en) * 1979-03-26 1981-10-27 Honeywell Inc. Fiber optic intruder alarm system
DE3278451D1 (en) * 1981-09-11 1988-06-09 Feller Ag Switching arrangement with an optical fibre
DE3322046C2 (en) * 1983-06-18 1986-01-23 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Fiber optic pressure and penetration sensor
DE3443949A1 (en) * 1984-12-01 1986-06-05 AEG KABEL AG, 4050 Mönchengladbach Light guide as force sensor
IL78728A (en) * 1986-05-08 1990-07-12 Magal Security Systems Ltd Security fence
DE3628083A1 (en) * 1986-08-19 1988-03-03 Felten & Guilleaume Energie Floor monitoring plate for antitheft protection - has optical conductors in bars linked together and coupled to central station
DE3731428A1 (en) * 1987-09-18 1989-04-06 Bayerische Motoren Werke Ag Device for avoiding parts of the body being pinched when electrically activated windows or sliding roofs close
DE3815152A1 (en) * 1988-05-04 1989-11-23 Strabag Bau Ag Device for monitoring and/or controlling rail-bound traffic
JPH0676172A (en) * 1991-04-16 1994-03-18 Sumitomo Electric Ind Ltd Detector for burglary
AU6140494A (en) * 1993-02-13 1994-08-29 Socoa International Holding S.A. Optic fiber security system
JP3528435B2 (en) * 1996-06-27 2004-05-17 トヨタ自動車株式会社 Road object detection device
DE19940549C1 (en) * 1999-08-26 2001-01-18 Siemens Ag Method of monitoring a route for a vehicle on a track, esp. a railway or magnetic levitation vehicle, enables simple, high sensitivity monitoring
DE10003333A1 (en) * 2000-01-27 2001-08-09 Jakob Reuter Monitoring device for determining and reporting the contact point of an object with a glass fiber light transmitter type sensor, due to the momentary loss of light at a sensor, especially intended for use with tennis games
GB0407386D0 (en) 2004-03-31 2004-05-05 British Telecomm Monitoring a communications link

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1497995A (en) * 1976-04-13 1978-01-12 Standard Telephones Cables Ltd Fibre optic acoustic monitoring arrangement
DE2810971C1 (en) * 1978-03-14 1985-12-05 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Light guide for monitoring a room or area

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4482890A (en) * 1981-01-22 1984-11-13 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Weight responsive intrusion detector using dual optical fibers
US5357813A (en) * 1991-10-17 1994-10-25 The State Of Israel, Ministry Of Defence Pressure sensor
US5462244A (en) * 1992-09-25 1995-10-31 N.V. Nederlandse Spoorwegen System for detecting trains
WO2003025524A1 (en) * 2001-09-19 2003-03-27 Gebert Ruediger Heinz Weight sensor
WO2004006200A3 (en) * 2002-07-04 2005-03-10 Lightspeed Inv S B V Gripping means for a signal line and signal line
WO2004006200A2 (en) * 2002-07-04 2004-01-15 Lightspeed Inventions B.V. Gripping means for a signal line and signal line
NL1020997C2 (en) * 2002-07-04 2004-01-13 Lightspeed Inv S B V Engaging means for a signal line, signal line and construction element.
US7667849B2 (en) 2003-09-30 2010-02-23 British Telecommunications Public Limited Company Optical sensor with interferometer for sensing external physical disturbance of optical communications link
US7796896B2 (en) 2003-09-30 2010-09-14 British Telecommunications Plc Secure optical communication
NL1024456C2 (en) * 2003-10-06 2005-04-07 Lightspeed Inv S B V Signal line, fence and method for manufacturing a fence.
WO2005034058A1 (en) * 2003-10-06 2005-04-14 Lightspeed Inventions B.V. Signal line, fence and method for manufacturing a fence
US7848645B2 (en) 2004-09-30 2010-12-07 British Telecommunications Public Limited Company Identifying or locating waveguides
US7995197B2 (en) 2004-09-30 2011-08-09 British Telecommunications Public Limited Company Distributed backscattering
US7656535B2 (en) 2004-12-17 2010-02-02 British Telecommunications Public Limited Company Optical system and method for inferring a disturbance
US8045174B2 (en) 2004-12-17 2011-10-25 British Telecommunications Public Limited Company Assessing a network
US7755971B2 (en) 2005-03-04 2010-07-13 British Telecommunications Public Limited Company Sensing system
US7697795B2 (en) 2005-03-04 2010-04-13 British Telecommunications Public Limited Company Acoustic modulation
US8396360B2 (en) 2005-03-31 2013-03-12 British Telecommunications Public Limited Company Communicating information
US8000609B2 (en) 2005-04-14 2011-08-16 British Telecommunications Public Limited Company Communicating or reproducing an audible sound
US8003932B2 (en) 2005-06-02 2011-08-23 British Telecommunications Public Limited Company Evaluating the position of a disturbance
US7961331B2 (en) 2006-02-24 2011-06-14 British Telecommunications Public Limited Company Sensing a disturbance along an optical path
US7817279B2 (en) 2006-02-24 2010-10-19 British Telecommunications Public Limited Company Sensing a disturbance
US8027584B2 (en) 2006-02-24 2011-09-27 British Telecommunications Public Limited Company Sensing a disturbance
US8670662B2 (en) 2006-04-03 2014-03-11 British Telecommunications Public Limited Company Evaluating the position of an optical fiber disturbance
EP2804166A1 (en) 2013-05-13 2014-11-19 PSS Consultancy & Equipment B.V. Sensor cable and system

Also Published As

Publication number Publication date
FR2418506A1 (en) 1979-09-21
NL7901615A (en) 1979-08-30
IT7967319A0 (en) 1979-02-14
DE2906841A1 (en) 1979-09-20
CH627573A5 (en) 1982-01-15
FR2418506B1 (en) 1982-10-29
BE873985A (en) 1979-08-07
IT1118351B (en) 1986-02-24
GB2015844B (en) 1982-06-03
DE2906841C2 (en) 1989-08-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee