NO20080846L - Demodulering av fasemodulerte signaler i et fiberoptisk folersystem - Google Patents

Demodulering av fasemodulerte signaler i et fiberoptisk folersystem

Info

Publication number
NO20080846L
NO20080846L NO20080846A NO20080846A NO20080846L NO 20080846 L NO20080846 L NO 20080846L NO 20080846 A NO20080846 A NO 20080846A NO 20080846 A NO20080846 A NO 20080846A NO 20080846 L NO20080846 L NO 20080846L
Authority
NO
Norway
Prior art keywords
demodulation
modulated signals
phase modulated
fiber optic
sensing system
Prior art date
Application number
NO20080846A
Other languages
English (en)
Other versions
NO342438B1 (no
Inventor
Philip John Nash
David John Tyler
Nicholas Middleton
Original Assignee
Qinetiq 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 Qinetiq Ltd filed Critical Qinetiq Ltd
Publication of NO20080846L publication Critical patent/NO20080846L/no
Publication of NO342438B1 publication Critical patent/NO342438B1/no

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING 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
    • G01D5/00—Mechanical 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
    • G01D5/26—Mechanical 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
    • G01D5/32—Mechanical 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
    • G01D5/34—Mechanical 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
    • G01D5/353—Mechanical 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING 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
    • G01D5/00—Mechanical 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
    • G01D5/26—Mechanical 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
    • G01D5/32—Mechanical 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
    • G01D5/34—Mechanical 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
    • G01D5/353—Mechanical 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
    • G01D5/35383—Mechanical 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2096—Arrangements for directly or externally modulating an optical carrier

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Transform (AREA)
  • Gyroscopes (AREA)
  • Optical Communication System (AREA)

Abstract

En demodulasjonsanordning (150) for demodulering av fasemodulerte signaler omfatter en kvadratursignalgenerator (QSG) (157) for generering av signaler i fase (I) og kvadratur (Q) som en reaksjon på et umodulert inngangssignal. QSG'en sørger for rask frekvenssporing av inngangssignalet og utelukker mulig høyfrekvent innhold i inngangssignalet.
NO20080846A 2005-08-23 2008-02-18 Demodulering av fasemodulerte signaler i et fiberoptisk følersystem NO342438B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0517210.1A GB0517210D0 (en) 2005-08-23 2005-08-23 Demodulation apparatus
PCT/GB2006/003065 WO2007023260A1 (en) 2005-08-23 2006-08-17 Demodulation of phase modulated fibre-optic sensor system signals

Publications (2)

Publication Number Publication Date
NO20080846L true NO20080846L (no) 2008-05-23
NO342438B1 NO342438B1 (no) 2018-05-22

Family

ID=35098115

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20080846A NO342438B1 (no) 2005-08-23 2008-02-18 Demodulering av fasemodulerte signaler i et fiberoptisk følersystem

Country Status (8)

Country Link
US (1) US8023829B2 (no)
EP (1) EP1917500B1 (no)
JP (1) JP2009506311A (no)
CN (1) CN101287965B (no)
AU (1) AU2006283424B9 (no)
GB (1) GB0517210D0 (no)
NO (1) NO342438B1 (no)
WO (1) WO2007023260A1 (no)

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KR101125466B1 (ko) 2009-05-20 2012-03-28 (주) 유식스 광섬유센서 위치측정 장치
JP2013174563A (ja) * 2012-02-27 2013-09-05 Oki Electric Ind Co Ltd 光ファイバセンサシステム
JP6205680B2 (ja) * 2012-02-29 2017-10-04 沖電気工業株式会社 干渉型光ファイバセンサ
CN102865914B (zh) * 2012-09-19 2013-12-18 朱涛 分布式光纤振动传感器
EP2860498B1 (en) 2013-10-09 2017-12-06 Optoplan AS Processing data from a distributed fibre-optic interferometric sensor system
JP6651697B2 (ja) 2015-01-26 2020-02-19 株式会社ソシオネクスト 電子回路、電源回路、回路の特性測定方法、及び振幅及び位相特性の演算プログラム
US11530606B2 (en) 2016-04-07 2022-12-20 Bp Exploration Operating Company Limited Detecting downhole sand ingress locations
EP3670830B1 (en) 2016-04-07 2021-08-11 BP Exploration Operating Company Limited Detecting downhole events using acoustic frequency domain features
CA3058256C (en) 2017-03-31 2023-09-12 Bp Exploration Operating Company Limited Well and overburden monitoring using distributed acoustic sensors
WO2019038401A1 (en) 2017-08-23 2019-02-28 Bp Exploration Operating Company Limited DETECTION OF SAND INPUT LOCATIONS AT THE BOTTOM OF A HOLE
CN111771042A (zh) 2017-10-11 2020-10-13 英国石油勘探运作有限公司 使用声学频域特征来检测事件
US20210389486A1 (en) 2018-11-29 2021-12-16 Bp Exploration Operating Company Limited DAS Data Processing to Identify Fluid Inflow Locations and Fluid Type
GB201820331D0 (en) 2018-12-13 2019-01-30 Bp Exploration Operating Co Ltd Distributed acoustic sensing autocalibration
US11899146B2 (en) 2019-01-25 2024-02-13 Halliburton Energy Services, Inc. Phase sensing with redundant sensor difference error detection and smart correction
EP4045766A1 (en) 2019-10-17 2022-08-24 Lytt Limited Fluid inflow characterization using hybrid das/dts measurements
WO2021073740A1 (en) 2019-10-17 2021-04-22 Lytt Limited Inflow detection using dts features
WO2021093974A1 (en) 2019-11-15 2021-05-20 Lytt Limited Systems and methods for draw down improvements across wellbores
WO2021249643A1 (en) 2020-06-11 2021-12-16 Lytt Limited Systems and methods for subterranean fluid flow characterization
CA3182376A1 (en) 2020-06-18 2021-12-23 Cagri CERRAHOGLU Event model training using in situ data

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56154859A (en) 1980-04-30 1981-11-30 Fujitsu Ltd Carrier wave regenerating circuit
GB2126820B (en) * 1982-07-17 1986-03-26 Plessey Co Plc An optical sensing system
WO1987002453A1 (en) 1985-10-21 1987-04-23 Plessey Overseas Limited Sensing system using fibre optic sensors
GB2197953B (en) * 1986-11-27 1990-06-06 Plessey Co Plc Acoustic sensor
US6985192B1 (en) * 1999-07-16 2006-01-10 Thomson Licensing Selective gain adjustment to aid carrier acquisition in a high definition television receiver
US7346279B1 (en) * 2002-03-25 2008-03-18 Forster Energy Llc Optical transceiver using heterodyne detection and a transmitted reference clock
DE102004054893A1 (de) * 2004-11-12 2006-05-24 Micronas Gmbh Verfahren und Schaltungsanordnung zur Kanalfilterung analog oder digital modulierter TV-Signale

Also Published As

Publication number Publication date
NO342438B1 (no) 2018-05-22
US20090220244A1 (en) 2009-09-03
CN101287965A (zh) 2008-10-15
EP1917500B1 (en) 2015-10-07
JP2009506311A (ja) 2009-02-12
GB0517210D0 (en) 2005-09-28
US8023829B2 (en) 2011-09-20
AU2006283424B2 (en) 2011-11-17
AU2006283424A1 (en) 2007-03-01
EP1917500A1 (en) 2008-05-07
WO2007023260A1 (en) 2007-03-01
AU2006283424B9 (en) 2012-02-02
CN101287965B (zh) 2012-08-08

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Legal Events

Date Code Title Description
CHAD Change of the owner's name or address (par. 44 patent law, par. patentforskriften)

Owner name: OPTASENSE HOLDINGS LTD, GB

MM1K Lapsed by not paying the annual fees