WO2013064829A3 - Passive fluid detector - Google Patents

Passive fluid detector Download PDF

Info

Publication number
WO2013064829A3
WO2013064829A3 PCT/GB2012/052721 GB2012052721W WO2013064829A3 WO 2013064829 A3 WO2013064829 A3 WO 2013064829A3 GB 2012052721 W GB2012052721 W GB 2012052721W WO 2013064829 A3 WO2013064829 A3 WO 2013064829A3
Authority
WO
WIPO (PCT)
Prior art keywords
capacitive element
sensor
fluid detector
passive fluid
granular material
Prior art date
Application number
PCT/GB2012/052721
Other languages
French (fr)
Other versions
WO2013064829A2 (en
Inventor
Harvey BURD
David Edwards
Original Assignee
Isis Innovation 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 Isis Innovation Ltd filed Critical Isis Innovation Ltd
Publication of WO2013064829A2 publication Critical patent/WO2013064829A2/en
Publication of WO2013064829A3 publication Critical patent/WO2013064829A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
    • G01M3/243—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations for pipes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/228—Circuits therefor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

Embodiments of the present invention provide a sensor comprising a sensor resonator member configured to resonate at a resonant frequency when exposed to a radio frequency electromagnetic field of a corresponding frequency, and a capacitive element coupled to the sensor resonator member, the capacitive element comprising first and second capacitor plates configured to be deposited in a granular material such that a portion of the granular material interposed between the first and second capacitor plates forms a dielectric layer of the capacitive element, wherein the sensor is configured such that the resonant frequency is dependent on a capacitance of the capacitive element.
PCT/GB2012/052721 2011-11-01 2012-11-01 Passive fluid detector WO2013064829A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1118839.8A GB2496136A (en) 2011-11-01 2011-11-01 Passive capacitive moisture detector
GB1118839.8 2011-11-01

Publications (2)

Publication Number Publication Date
WO2013064829A2 WO2013064829A2 (en) 2013-05-10
WO2013064829A3 true WO2013064829A3 (en) 2013-10-03

Family

ID=45375632

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2012/052721 WO2013064829A2 (en) 2011-11-01 2012-11-01 Passive fluid detector

Country Status (2)

Country Link
GB (1) GB2496136A (en)
WO (1) WO2013064829A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019205085A1 (en) 2018-04-27 2019-10-31 Texas Instruments Incorporated Target material sensing using resonant circuit with sensing capacitor and electrical isolation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0435585A2 (en) * 1989-12-28 1991-07-03 AT&T Corp. Locatable object suitable for underground use and methods of locating same
GB2457384A (en) * 2008-02-14 2009-08-19 Isis Innovation Polarised resonant reflector assembly used in a method of article identification
US20100253369A1 (en) * 2007-01-10 2010-10-07 Alain Izadnegahdar Soil humidity evaluation with contact free coupling
EP2275805A1 (en) * 2009-07-16 2011-01-19 Acreo AB Moister sensor
WO2011073657A2 (en) * 2009-12-15 2011-06-23 Isis Innovation Ltd Asset detection apparatus and method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491784A (en) * 1982-08-31 1985-01-01 The Babcock & Wilcox Company Piezoelectric moisture measuring device
DE19934881A1 (en) * 1999-07-24 2001-01-25 Deere & Co Device for measuring the moisture of crops
US6975245B1 (en) * 2000-09-18 2005-12-13 Battelle Energy Alliance, Llc Real-time data acquisition and telemetry based irrigation control system
JP3717068B2 (en) * 2002-08-23 2005-11-16 松下電器産業株式会社 Liquid detection sensor and liquid detection device
US8542025B2 (en) * 2008-10-14 2013-09-24 Donald J. Geisel Embeddable moisture sensor, measurement device and method of use thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0435585A2 (en) * 1989-12-28 1991-07-03 AT&T Corp. Locatable object suitable for underground use and methods of locating same
US20100253369A1 (en) * 2007-01-10 2010-10-07 Alain Izadnegahdar Soil humidity evaluation with contact free coupling
GB2457384A (en) * 2008-02-14 2009-08-19 Isis Innovation Polarised resonant reflector assembly used in a method of article identification
EP2275805A1 (en) * 2009-07-16 2011-01-19 Acreo AB Moister sensor
WO2011073657A2 (en) * 2009-12-15 2011-06-23 Isis Innovation Ltd Asset detection apparatus and method

Also Published As

Publication number Publication date
GB201118839D0 (en) 2011-12-14
WO2013064829A2 (en) 2013-05-10
GB2496136A (en) 2013-05-08

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