GB1603578A - System and method for identifying samples having conductive properties - Google Patents

System and method for identifying samples having conductive properties Download PDF

Info

Publication number
GB1603578A
GB1603578A GB1906478A GB1906478A GB1603578A GB 1603578 A GB1603578 A GB 1603578A GB 1906478 A GB1906478 A GB 1906478A GB 1906478 A GB1906478 A GB 1906478A GB 1603578 A GB1603578 A GB 1603578A
Authority
GB
United Kingdom
Prior art keywords
coil
frequency
resistive component
phase
signal
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
GB1906478A
Other languages
English (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.)
Georgetown University
Original Assignee
Georgetown University
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 Georgetown University filed Critical Georgetown University
Publication of GB1603578A publication Critical patent/GB1603578A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit
    • 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
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
    • G01V3/105—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Remote Sensing (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Electrochemistry (AREA)
  • Biochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
GB1906478A 1978-08-25 1978-05-11 System and method for identifying samples having conductive properties Expired GB1603578A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782837265 DE2837265A1 (de) 1978-08-25 1978-08-25 Verfahren und systemanordnung zur identifizierung von leitfaehigen gegenstaenden

Publications (1)

Publication Number Publication Date
GB1603578A true GB1603578A (en) 1981-11-25

Family

ID=6047949

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1906478A Expired GB1603578A (en) 1978-08-25 1978-05-11 System and method for identifying samples having conductive properties

Country Status (7)

Country Link
CA (1) CA1157096A (xx)
CH (1) CH660799A5 (xx)
DE (1) DE2837265A1 (xx)
FR (1) FR2456951A1 (xx)
GB (1) GB1603578A (xx)
NL (1) NL7903965A (xx)
SE (1) SE440832B (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140564A (en) * 1983-05-23 1984-11-28 Central Electr Generat Board Cable corrosion monitor
EP0927364A1 (en) * 1996-09-18 1999-07-07 MacAleese Companies, Inc. Concealed weapons detection system
WO2004077044A1 (de) * 2003-02-28 2004-09-10 Forschungszentrum Jülich GmbH Verfahren und vorrichtung zum selektiven nachweis ferromagnetischer oder superparamagnetischer partikel
US7167123B2 (en) 1999-05-25 2007-01-23 Safe Zone Systems, Inc. Object detection method and apparatus
US7450052B2 (en) 1999-05-25 2008-11-11 The Macaleese Companies, Inc. Object detection method and apparatus
US8278918B2 (en) 2010-10-07 2012-10-02 Mettler-Toledo Safeline Limited Method for operating of a metal detection system and metal detection system
US8314713B2 (en) 2010-10-07 2012-11-20 Mettler-Toledo Safeline Limited Method for monitoring the operation of a metal detection system and metal detection system
US8587301B2 (en) 2010-10-07 2013-11-19 Mettler-Toledo Safeline Limited Method for operating a metal detection system and metal detection system
US9018935B2 (en) 2011-09-19 2015-04-28 Mettler-Toledo Safeline Limited Method for operating a metal detection apparatus and apparatus

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3228447C2 (de) * 1982-07-30 1986-04-10 Vallon GmbH, 7412 Eningen Meßverfahren zur Erkennung von metallischen Gegenständen und Metalldetektor zur Durchführung des Verfahrens
FR2545221B1 (fr) * 1983-04-29 1985-12-13 Thomson Jeumont Cables Capteur de donnees, par courant de foucault, et ensemble de controle de resistivite muni d'un tel capteur
EP0211905B1 (en) * 1985-02-15 1990-10-03 The Broken Hill Proprietary Company Limited Classification of steel
DE3713363A1 (de) * 1987-04-21 1988-11-10 Friedrich Prof Dr Foerster Suchgeraet zum suchen von metallteilen
CN1049287A (zh) * 1989-05-24 1991-02-20 住友电气工业株式会社 治疗导管
GB8920412D0 (en) * 1989-09-08 1989-10-25 Ca Atomic Energy Ltd Metal detecting system
DE19521266C1 (de) * 1995-06-10 1997-02-13 Mesutronic Geraetebau Gmbh Einrichtung zur Feststellung metallisch leitender Teile
DE19954716B4 (de) * 1999-11-13 2006-08-31 Mesutronic Gerätebau GmbH Funktionsprüfung für einen Metalldetektor
US7976518B2 (en) 2005-01-13 2011-07-12 Corpak Medsystems, Inc. Tubing assembly and signal generator placement control device and method for use with catheter guidance systems
US9028441B2 (en) 2011-09-08 2015-05-12 Corpak Medsystems, Inc. Apparatus and method used with guidance system for feeding and suctioning

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676772A (en) * 1970-08-18 1972-07-11 Nasa Metallic intrusion detector system
US3686564A (en) * 1970-10-08 1972-08-22 Westinghouse Electric Corp Multiple frequency magnetic field technique for differentiating between classes of metal objects
GB1482976A (en) * 1975-06-09 1977-08-17 Spencer P Metal detectors

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140564A (en) * 1983-05-23 1984-11-28 Central Electr Generat Board Cable corrosion monitor
US4652823A (en) * 1983-05-23 1987-03-24 Central Electricity Generating Board Apparatus for and method of monitoring the corrosion in electrical power cables by measuring the variation in induced eddy currents
EP0927364A1 (en) * 1996-09-18 1999-07-07 MacAleese Companies, Inc. Concealed weapons detection system
US7167123B2 (en) 1999-05-25 2007-01-23 Safe Zone Systems, Inc. Object detection method and apparatus
US7450052B2 (en) 1999-05-25 2008-11-11 The Macaleese Companies, Inc. Object detection method and apparatus
WO2004077044A1 (de) * 2003-02-28 2004-09-10 Forschungszentrum Jülich GmbH Verfahren und vorrichtung zum selektiven nachweis ferromagnetischer oder superparamagnetischer partikel
US8071027B2 (en) 2003-02-28 2011-12-06 Forschungszentrum Juelich Gmbh Method and device for selectively detecting ferromagnetic or superparamagnetic particles
US8278918B2 (en) 2010-10-07 2012-10-02 Mettler-Toledo Safeline Limited Method for operating of a metal detection system and metal detection system
US8314713B2 (en) 2010-10-07 2012-11-20 Mettler-Toledo Safeline Limited Method for monitoring the operation of a metal detection system and metal detection system
US8587301B2 (en) 2010-10-07 2013-11-19 Mettler-Toledo Safeline Limited Method for operating a metal detection system and metal detection system
US9018935B2 (en) 2011-09-19 2015-04-28 Mettler-Toledo Safeline Limited Method for operating a metal detection apparatus and apparatus

Also Published As

Publication number Publication date
SE7904329L (sv) 1980-11-18
FR2456951B1 (xx) 1985-04-19
SE440832B (sv) 1985-08-19
CH660799A5 (en) 1987-06-15
NL7903965A (nl) 1980-11-25
DE2837265C2 (xx) 1987-02-05
FR2456951A1 (fr) 1980-12-12
CA1157096A (en) 1983-11-15
DE2837265A1 (de) 1980-03-06

Similar Documents

Publication Publication Date Title
US4263551A (en) Method and apparatus for identifying conductive objects by monitoring the true resistive component of impedance change in a coil system caused by the object
GB1603578A (en) System and method for identifying samples having conductive properties
US5541510A (en) Multi-Parameter eddy current measuring system with parameter compensation technical field
CA1056915A (en) Method and apparatus for testing conductivity using eddy currents
US4322678A (en) Identification of materials using their complex dielectric response
JP3299273B2 (ja) プロセス・プラズマのａｃ特性を特徴付ける装置
CN105866176A (zh) 金属分类探测的标定方法、测试方法及其系统
US5754049A (en) Method and apparatus for locating buried conductors in the presence of plural conductors
Rehim et al. Measurement system for determining the magnetic polarizability tensor of small metal targets
JPS60152950A (ja) 渦電流非破壊試験方法およびその装置
US2939073A (en) Conductivity measuring instrument
US2595675A (en) Impedance measuring apparatus
WO1979000257A1 (en) Identification of materials using their complex dielectric response
Özdeğer et al. Measuring the magnetic polarizability tensor using an axial multi-coil geometry
US4078201A (en) Oscillator circuit for generating a signal whose frequency is representative of the phase shift of a four terminal network
US2764734A (en) Phase angle method of metal thickness indication
US3619771A (en) Method of an apparatus for selecting the optimum test frequency in eddy current testing
US3255405A (en) Apparatus for measuring the electrical conductivity of a sample
US2751552A (en) Thickness gage for metallic coatings
US3611119A (en) Method for measuring the ferrite content of a material
US20150255660A1 (en) Magnetic effects sensor, a resistor and method of implementing same
US20170097439A1 (en) High frequency electromagnetic induction
Paulter Jr et al. Handheld metal detector characterization using spherical test objects
RU2090882C1 (ru) Вихретоковый дефектоскоп для контроля цилиндрических изделий
Uehara et al. The “Meteorite meter”: A handheld instrument for the combined measurement of magnetic susceptibility and electrical conductivity, with application to meteorite identification and classification

Legal Events

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