NO20003686L - Fremgangsmåte for fire-trinns diskret faseskiftdemodulasjon for fiberoptiske sensoroppstillinger - Google Patents

Fremgangsmåte for fire-trinns diskret faseskiftdemodulasjon for fiberoptiske sensoroppstillinger

Info

Publication number
NO20003686L
NO20003686L NO20003686A NO20003686A NO20003686L NO 20003686 L NO20003686 L NO 20003686L NO 20003686 A NO20003686 A NO 20003686A NO 20003686 A NO20003686 A NO 20003686A NO 20003686 L NO20003686 L NO 20003686L
Authority
NO
Norway
Prior art keywords
phase shift
fiber optic
sensor array
optic sensor
discrete phase
Prior art date
Application number
NO20003686A
Other languages
English (en)
Other versions
NO20003686D0 (no
Inventor
David B Hall
Original Assignee
Litton Systems Inc
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 Litton Systems Inc filed Critical Litton Systems Inc
Publication of NO20003686D0 publication Critical patent/NO20003686D0/no
Publication of NO20003686L publication Critical patent/NO20003686L/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
    • G01D5/35303—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 a reference fibre, e.g. interferometric devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
    • G01J9/02—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Transform (AREA)
  • Gyroscopes (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
NO20003686A 1999-07-30 2000-07-18 Fremgangsmåte for fire-trinns diskret faseskiftdemodulasjon for fiberoptiske sensoroppstillinger NO20003686L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/364,396 US6122057A (en) 1999-07-30 1999-07-30 Four step discrete phase shift demodulation method for fiber optic sensor arrays

Publications (2)

Publication Number Publication Date
NO20003686D0 NO20003686D0 (no) 2000-07-18
NO20003686L true NO20003686L (no) 2001-01-31

Family

ID=23434352

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20003686A NO20003686L (no) 1999-07-30 2000-07-18 Fremgangsmåte for fire-trinns diskret faseskiftdemodulasjon for fiberoptiske sensoroppstillinger

Country Status (5)

Country Link
US (1) US6122057A (no)
EP (1) EP1072866B1 (no)
CA (1) CA2315591C (no)
DE (1) DE60022955T2 (no)
NO (1) NO20003686L (no)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030173205A1 (en) 2002-03-12 2003-09-18 Arne Karlsson Process vessel with integral evaporator
US6989131B2 (en) 2002-03-12 2006-01-24 Uop Llc Catalytic reactor with integral evaporator
US7063982B1 (en) 2002-03-12 2006-06-20 Uop Llc Process of vaporizing and reacting a liquid feed
US6778720B1 (en) 2002-04-02 2004-08-17 Optiphase, Inc. Dual slope fiber optic array interrogator
US7038784B2 (en) * 2003-06-20 2006-05-02 Northrop Grumman Corporation Calculation of sensor array induced phase angle independent from demodulation phase offset of phase generated carrier
US7012245B2 (en) * 2003-07-09 2006-03-14 Northrop Grumman Corporation Calculation of sensor array induced phase angle
US7038785B2 (en) * 2003-07-09 2006-05-02 Northrop Grumman Corporation Filtered calculation of sensor array induced phase angle independent from demodulation phase offset of phase generated carrier
US6934034B2 (en) * 2003-08-05 2005-08-23 Northrop Grumman Corporation Sensor array induced phase angle calculation based on mixed signals
US7327462B2 (en) 2005-08-17 2008-02-05 Litton Systems, Inc. Method and apparatus for direct detection of signals from a differential delay heterodyne interferometric system
US7339678B2 (en) * 2005-11-09 2008-03-04 Northrop Grumman Corporation Method and system of using odd harmonics for phase generated carrier homodyne
CN102288387B (zh) * 2011-04-26 2013-11-20 中国科学院上海光学精密机械研究所 半导体激光正弦相位调制干涉仪调制深度的测量方法
GB2560522B (en) * 2017-03-13 2022-03-16 Aiq Dienstleistungen Ug Haftungsbeschraenkt Dynamic sensitivity distributed acoustic sensing
RU2696324C1 (ru) * 2018-12-15 2019-08-01 федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский политехнический университет Петра Великого" (ФГАОУ ВО "СПбПУ") Способ демодуляции сигнала фазового оптического датчика
CN112729572B (zh) * 2020-12-25 2021-11-30 南通大学 一种具有调制误差自消除功能的多步移相相位检测方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5212825A (en) * 1990-11-09 1993-05-18 Litton Systems, Inc. Synthetic heterodyne demodulator circuit
US5218418A (en) * 1991-10-30 1993-06-08 Layton Michael R Differential fiber optic sensor and method
US5748314A (en) * 1995-11-08 1998-05-05 Advantest Corporation Correlation function measurement method and apparatus, and wave source image visualization method and apparatus based on correlation function measurement
US5995207A (en) * 1997-11-26 1999-11-30 Litton Systems, Inc. Method for determining the phase difference of light waves propagated over two paths

Also Published As

Publication number Publication date
NO20003686D0 (no) 2000-07-18
EP1072866B1 (en) 2005-10-05
DE60022955T2 (de) 2006-07-27
DE60022955D1 (de) 2006-02-16
EP1072866A3 (en) 2004-06-23
CA2315591A1 (en) 2001-01-30
CA2315591C (en) 2003-06-24
EP1072866A2 (en) 2001-01-31
US6122057A (en) 2000-09-19

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Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application