GB2248498B - Variable gain optical sensing system - Google Patents

Variable gain optical sensing system

Info

Publication number
GB2248498B
GB2248498B GB9021549A GB9021549A GB2248498B GB 2248498 B GB2248498 B GB 2248498B GB 9021549 A GB9021549 A GB 9021549A GB 9021549 A GB9021549 A GB 9021549A GB 2248498 B GB2248498 B GB 2248498B
Authority
GB
United Kingdom
Prior art keywords
sensing system
variable gain
optical sensing
gain optical
variable
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 - Fee Related
Application number
GB9021549A
Other versions
GB2248498A (en
GB9021549D0 (en
Inventor
Christopher Lamb
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.)
BAE Systems Electronics Ltd
Original Assignee
GEC Marconi Ltd
Marconi Co 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 GEC Marconi Ltd, Marconi Co Ltd filed Critical GEC Marconi Ltd
Priority to GB9021549A priority Critical patent/GB2248498B/en
Publication of GB9021549D0 publication Critical patent/GB9021549D0/en
Priority to AU86381/91A priority patent/AU8638191A/en
Priority to PCT/GB1991/001667 priority patent/WO1992006358A1/en
Publication of GB2248498A publication Critical patent/GB2248498A/en
Application granted granted Critical
Publication of GB2248498B publication Critical patent/GB2248498B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/35383Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using multiple sensor devices using multiplexing techniques
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01HMEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H9/00Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
    • G01H9/004Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
GB9021549A 1990-10-04 1990-10-04 Variable gain optical sensing system Expired - Fee Related GB2248498B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9021549A GB2248498B (en) 1990-10-04 1990-10-04 Variable gain optical sensing system
AU86381/91A AU8638191A (en) 1990-10-04 1991-09-26 Variable gain optical sensing system
PCT/GB1991/001667 WO1992006358A1 (en) 1990-10-04 1991-09-26 Variable gain optical sensing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9021549A GB2248498B (en) 1990-10-04 1990-10-04 Variable gain optical sensing system

Publications (3)

Publication Number Publication Date
GB9021549D0 GB9021549D0 (en) 1991-06-12
GB2248498A GB2248498A (en) 1992-04-08
GB2248498B true GB2248498B (en) 1994-04-13

Family

ID=10683205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9021549A Expired - Fee Related GB2248498B (en) 1990-10-04 1990-10-04 Variable gain optical sensing system

Country Status (3)

Country Link
AU (1) AU8638191A (en)
GB (1) GB2248498B (en)
WO (1) WO1992006358A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5557400A (en) * 1995-02-15 1996-09-17 Hewlett-Packard Company Multiplexed sensing using optical coherence reflectrometry
US5698848A (en) * 1995-06-07 1997-12-16 Mcdonnell Douglas Corporation Fiber optic sensing systems and methods including contiguous optical cavities
GB9710057D0 (en) * 1997-05-19 1997-07-09 King S College London Distributed sensing system
US6274863B1 (en) * 1999-07-23 2001-08-14 Cidra Corporation Selective aperture arrays for seismic monitoring

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2190262B (en) * 1986-05-09 1990-09-05 Stc Plc Sensor
GB2202046A (en) * 1987-03-11 1988-09-14 Plessey Co Plc Optical fibre sensor arrangement
GB2222247A (en) * 1988-08-23 1990-02-28 Plessey Co Plc Distributed fibre optic sensor system

Also Published As

Publication number Publication date
AU8638191A (en) 1992-04-28
WO1992006358A1 (en) 1992-04-16
GB2248498A (en) 1992-04-08
GB9021549D0 (en) 1991-06-12

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Legal Events

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

Effective date: 19941004