GB2015844B - Device for detecting the presence of an object - Google Patents

Device for detecting the presence of an object

Info

Publication number
GB2015844B
GB2015844B GB7903921A GB7903921A GB2015844B GB 2015844 B GB2015844 B GB 2015844B GB 7903921 A GB7903921 A GB 7903921A GB 7903921 A GB7903921 A GB 7903921A GB 2015844 B GB2015844 B GB 2015844B
Authority
GB
United Kingdom
Prior art keywords
detecting
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.)
Expired
Application number
GB7903921A
Other versions
GB2015844A (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 train
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
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 GB2015844A (en) 1979-09-12
GB2015844B true 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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7974182B2 (en) 2004-03-31 2011-07-05 British Telecommunications Public Limited Company Evaluating the position of a disturbance

Families Citing this family (35)

* 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
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
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
IL99773A (en) * 1991-10-17 1995-11-27 Israel State Pressure sensor
NL9201667A (en) * 1992-09-25 1994-04-18 Nl Spoorwegen Nv System for detecting trains.
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
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.
GB0322859D0 (en) 2003-09-30 2003-10-29 British Telecomm Communication
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
NL1024456C2 (en) * 2003-10-06 2005-04-07 Lightspeed Inv S B V Signal line, fence and method for manufacturing a fence.
GB0421747D0 (en) 2004-09-30 2004-11-03 British Telecomm Distributed backscattering
US7848645B2 (en) 2004-09-30 2010-12-07 British Telecommunications Public Limited Company Identifying or locating waveguides
GB0427733D0 (en) 2004-12-17 2005-01-19 British Telecomm Optical system
WO2006064243A1 (en) 2004-12-17 2006-06-22 British Telecommunications Public Limited Company Assessing a network
GB0504579D0 (en) 2005-03-04 2005-04-13 British Telecomm Communications system
EP1853964B1 (en) 2005-03-04 2009-06-24 British Telecommunications Public Limited Company Acousto-optical modulator arrangement
EP1708388A1 (en) 2005-03-31 2006-10-04 British Telecommunications Public Limited Company Communicating information
EP1713301A1 (en) 2005-04-14 2006-10-18 BRITISH TELECOMMUNICATIONS public limited company Method and apparatus for communicating sound over an optical link
EP1729096A1 (en) 2005-06-02 2006-12-06 BRITISH TELECOMMUNICATIONS public limited company Method and apparatus for determining the position of a disturbance in an optical fibre
WO2007096579A1 (en) 2006-02-24 2007-08-30 British Telecommunications Public Limited Company Sensing a disturbance
EP1826924A1 (en) 2006-02-24 2007-08-29 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

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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7974182B2 (en) 2004-03-31 2011-07-05 British Telecommunications Public Limited Company Evaluating the position of a disturbance

Also Published As

Publication number Publication date
NL7901615A (en) 1979-08-30
DE2906841C2 (en) 1989-08-24
IT1118351B (en) 1986-02-24
DE2906841A1 (en) 1979-09-20
FR2418506B1 (en) 1982-10-29
IT7967319A0 (en) 1979-02-14
BE873985A (en) 1979-08-07
GB2015844A (en) 1979-09-12
FR2418506A1 (en) 1979-09-21
CH627573A5 (en) 1982-01-15

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Legal Events

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