SE7904329L - Utrustning och metod for att identifiera foremal med elektriskt ledande egenskaper - Google Patents

Utrustning och metod for att identifiera foremal med elektriskt ledande egenskaper

Info

Publication number
SE7904329L
SE7904329L SE7904329A SE7904329A SE7904329L SE 7904329 L SE7904329 L SE 7904329L SE 7904329 A SE7904329 A SE 7904329A SE 7904329 A SE7904329 A SE 7904329A SE 7904329 L SE7904329 L SE 7904329L
Authority
SE
Sweden
Prior art keywords
frequency
coil
conductive
divided
type
Prior art date
Application number
SE7904329A
Other languages
English (en)
Swedish (sv)
Other versions
SE440832B (sv
Inventor
W D Gregory
L H Capots
J P George
R Janik
Original Assignee
Univ Georgetown
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 Univ Georgetown filed Critical Univ Georgetown
Publication of SE7904329L publication Critical patent/SE7904329L/
Publication of SE440832B publication Critical patent/SE440832B/sv

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Remote Sensing (AREA)
  • Engineering & Computer Science (AREA)
  • Immunology (AREA)
  • Electromagnetism (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Electrochemistry (AREA)
  • Analytical Chemistry (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)
SE7904329A 1978-08-25 1979-05-17 Utrustning och metod for att identifiera foremal med elektriskt ledande egenskaper SE440832B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782837265 DE2837265C2 (de) 1978-08-25 1978-08-25 Verfahren zur Identifizierung von Objekten mit leitenden Eigenschaften und Schaltungsanordnung zur Durchführung dieses Verfahrens

Publications (2)

Publication Number Publication Date
SE7904329L true SE7904329L (sv) 1980-11-18
SE440832B SE440832B (sv) 1985-08-19

Family

ID=6047949

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7904329A SE440832B (sv) 1978-08-25 1979-05-17 Utrustning och metod for att identifiera foremal med elektriskt ledande egenskaper

Country Status (7)

Country Link
CA (1) CA1157096A ( )
CH (1) CH660799A5 ( )
DE (1) DE2837265C2 ( )
FR (1) FR2456951A1 ( )
GB (1) GB1603578A ( )
NL (1) NL7903965A ( )
SE (1) SE440832B ( )

Families Citing this family (22)

* 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
GB2140564B (en) * 1983-05-23 1986-10-22 Central Electr Generat Board Cable corrosion monitor
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
US6359582B1 (en) * 1996-09-18 2002-03-19 The 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
DE19954716B4 (de) * 1999-11-13 2006-08-31 Mesutronic Gerätebau GmbH Funktionsprüfung für einen Metalldetektor
US6511474B1 (en) 2000-07-12 2003-01-28 Corpak, Inc. Bolus for non-occluding high flow enteral feeding tube
DE10309132A1 (de) * 2003-02-28 2004-11-18 Forschungszentrum Jülich GmbH Verfahren und Vorrichtung zum selektiven Nachweis magnetischer Partikel
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
RU2331113C2 (ru) * 2006-08-29 2008-08-10 Государственное образовательное учреждение высшего профессионального образования "Сибирский государственный университет телекоммуникаций и информатики" (ГОУ ВПО "СибГУТИ") Устройство обнаружения и классификации металлических предметов
EP2625551B1 (en) 2010-10-07 2016-11-09 Mettler-Toledo Safeline Limited Method for operating a metal detection system and metal detection system
EP2439560B1 (en) 2010-10-07 2013-05-29 Mettler-Toledo Safeline Limited Method for monitoring the operation of a metal detection system and metal detection system
EP2439559B1 (en) 2010-10-07 2013-05-29 Mettler-Toledo Safeline Limited Method for operating of a metal detection system and metal detection system
WO2013036772A1 (en) 2011-09-08 2013-03-14 Corpak Medsystems, Inc. Apparatus and method used with guidance system for feeding and suctioning
US9018935B2 (en) 2011-09-19 2015-04-28 Mettler-Toledo Safeline Limited Method for operating a metal detection apparatus and apparatus
CN117631060B (zh) * 2023-12-07 2025-02-11 中南大学 超低电阻率的无接触式测量计算方法及系统

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

Also Published As

Publication number Publication date
CA1157096A (en) 1983-11-15
DE2837265A1 (de) 1980-03-06
FR2456951B1 ( ) 1985-04-19
NL7903965A (nl) 1980-11-25
GB1603578A (en) 1981-11-25
FR2456951A1 (fr) 1980-12-12
SE440832B (sv) 1985-08-19
CH660799A5 (en) 1987-06-15
DE2837265C2 (de) 1987-02-05

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