DE2837265A1 - Verfahren und systemanordnung zur identifizierung von leitfaehigen gegenstaenden - Google Patents

Verfahren und systemanordnung zur identifizierung von leitfaehigen gegenstaenden

Info

Publication number
DE2837265A1
DE2837265A1 DE19782837265 DE2837265A DE2837265A1 DE 2837265 A1 DE2837265 A1 DE 2837265A1 DE 19782837265 DE19782837265 DE 19782837265 DE 2837265 A DE2837265 A DE 2837265A DE 2837265 A1 DE2837265 A1 DE 2837265A1
Authority
DE
Germany
Prior art keywords
coil
frequency
resistance component
phase
values
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.)
Granted
Application number
DE19782837265
Other languages
German (de)
English (en)
Other versions
DE2837265C2 (US08197722-20120612-C00042.png
Inventor
Larry Howard Capots
James Paul George
William David Gregory
Richard Janik
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
Priority to GB1906478A priority Critical patent/GB1603578A/en
Application filed by Georgetown University filed Critical Georgetown University
Priority to DE19782837265 priority patent/DE2837265A1/de
Priority to CA000326644A priority patent/CA1157096A/en
Priority to FR7912313A priority patent/FR2456951A1/fr
Priority to SE7904329A priority patent/SE440832B/sv
Priority to NL7903965A priority patent/NL7903965A/nl
Priority to CH471579A priority patent/CH660799A5/de
Publication of DE2837265A1 publication Critical patent/DE2837265A1/de
Application granted granted Critical
Publication of DE2837265C2 publication Critical patent/DE2837265C2/de
Granted 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)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Remote Sensing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Geology (AREA)
  • Geophysics (AREA)
  • Electromagnetism (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
DE19782837265 1978-08-25 1978-08-25 Verfahren und systemanordnung zur identifizierung von leitfaehigen gegenstaenden Granted DE2837265A1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB1906478A GB1603578A (en) 1978-08-25 1978-05-11 System and method for identifying samples having conductive properties
DE19782837265 DE2837265A1 (de) 1978-08-25 1978-08-25 Verfahren und systemanordnung zur identifizierung von leitfaehigen gegenstaenden
CA000326644A CA1157096A (en) 1978-08-25 1979-04-30 Systems and method for identifying objects having conductive properties
FR7912313A FR2456951A1 (fr) 1978-08-25 1979-05-15 Procede et appareil pour l'identification d'objets dissimules conducteurs de l'electricite
SE7904329A SE440832B (sv) 1978-08-25 1979-05-17 Utrustning och metod for att identifiera foremal med elektriskt ledande egenskaper
NL7903965A NL7903965A (nl) 1978-08-25 1979-05-21 Systeem en werkwijze voor identificatie van voorwerpen met geleidende eigenschappen.
CH471579A CH660799A5 (en) 1978-08-25 1979-05-21 Device for identifying conductive objects

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 (2)

Publication Number Publication Date
DE2837265A1 true DE2837265A1 (de) 1980-03-06
DE2837265C2 DE2837265C2 (US08197722-20120612-C00042.png) 1987-02-05

Family

ID=6047949

Family Applications (1)

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

Country Status (7)

Country Link
CA (1) CA1157096A (US08197722-20120612-C00042.png)
CH (1) CH660799A5 (US08197722-20120612-C00042.png)
DE (1) DE2837265A1 (US08197722-20120612-C00042.png)
FR (1) FR2456951A1 (US08197722-20120612-C00042.png)
GB (1) GB1603578A (US08197722-20120612-C00042.png)
NL (1) NL7903965A (US08197722-20120612-C00042.png)
SE (1) SE440832B (US08197722-20120612-C00042.png)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3228447A1 (de) * 1982-07-30 1984-02-02 Vallon GmbH, 7412 Eningen Messverfahren zur erkennung von metallischen gegenstaenden und metalldetektor zur durchfuehrung des verfahrens
EP0399536A1 (en) * 1989-05-24 1990-11-28 Micronix Pty Ltd Medical instrument location means
WO1991003746A1 (en) * 1989-09-08 1991-03-21 Atomic Energy Of Canada Limited Metal detecting system
US5929634A (en) * 1995-06-10 1999-07-27 Firma Mesutronic Geratebau Gmbh Device for sensing metallically conductive parts in an at least substantially non-conductive conveyor stream
DE19954716A1 (de) * 1999-11-13 2001-06-07 Mesutronic Geraetebau Gmbh Funktionsprüfung für einen Metalldetektor
US9889277B2 (en) 2005-01-13 2018-02-13 Avent, Inc. Tubing assembly and signal generator placement control device and method for use with catheter guidance systems
US9918907B2 (en) 2011-09-08 2018-03-20 Avent, Inc. Method for electromagnetic guidance of feeding and suctioning tube assembly

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4818936A (en) * 1985-02-15 1989-04-04 The Broken Hill Proprietary Company Limited Method and apparatus for identifying and classifying steels
DE3713363A1 (de) * 1987-04-21 1988-11-10 Friedrich Prof Dr Foerster Suchgeraet zum suchen von metallteilen
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
DE10309132A1 (de) 2003-02-28 2004-11-18 Forschungszentrum Jülich GmbH Verfahren und Vorrichtung zum selektiven Nachweis magnetischer Partikel
CA2813496C (en) 2010-10-07 2018-12-04 Mettler-Toledo Safeline Limited Method for operating 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
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
US9018935B2 (en) 2011-09-19 2015-04-28 Mettler-Toledo Safeline Limited Method for operating a metal detection apparatus and apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686564A (en) * 1970-10-08 1972-08-22 Westinghouse Electric Corp Multiple frequency magnetic field technique for differentiating between classes of metal objects
DE2605277A1 (de) * 1975-06-09 1976-12-30 Arado Electronics Metallsuchvorrichtung

Family Cites Families (1)

* 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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686564A (en) * 1970-10-08 1972-08-22 Westinghouse Electric Corp Multiple frequency magnetic field technique for differentiating between classes of metal objects
DE2605277A1 (de) * 1975-06-09 1976-12-30 Arado Electronics Metallsuchvorrichtung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3228447A1 (de) * 1982-07-30 1984-02-02 Vallon GmbH, 7412 Eningen Messverfahren zur erkennung von metallischen gegenstaenden und metalldetektor zur durchfuehrung des verfahrens
EP0399536A1 (en) * 1989-05-24 1990-11-28 Micronix Pty Ltd Medical instrument location means
WO1991003746A1 (en) * 1989-09-08 1991-03-21 Atomic Energy Of Canada Limited Metal detecting system
AU640685B2 (en) * 1989-09-08 1993-09-02 Atomic Energy Of Canada Limited Metal detecting system
US5929634A (en) * 1995-06-10 1999-07-27 Firma Mesutronic Geratebau Gmbh Device for sensing metallically conductive parts in an at least substantially non-conductive conveyor stream
DE19954716A1 (de) * 1999-11-13 2001-06-07 Mesutronic Geraetebau Gmbh Funktionsprüfung für einen Metalldetektor
DE19954716B4 (de) * 1999-11-13 2006-08-31 Mesutronic Gerätebau GmbH Funktionsprüfung für einen Metalldetektor
US9889277B2 (en) 2005-01-13 2018-02-13 Avent, Inc. Tubing assembly and signal generator placement control device and method for use with catheter guidance systems
US10549074B2 (en) 2005-01-13 2020-02-04 Avent, Inc. Tubing assembly and signal generation placement device and method for use with catheter guidance systems
US9918907B2 (en) 2011-09-08 2018-03-20 Avent, Inc. Method for electromagnetic guidance of feeding and suctioning tube assembly

Also Published As

Publication number Publication date
DE2837265C2 (US08197722-20120612-C00042.png) 1987-02-05
CA1157096A (en) 1983-11-15
FR2456951B1 (US08197722-20120612-C00042.png) 1985-04-19
NL7903965A (nl) 1980-11-25
CH660799A5 (en) 1987-06-15
FR2456951A1 (fr) 1980-12-12
GB1603578A (en) 1981-11-25
SE7904329L (sv) 1980-11-18
SE440832B (sv) 1985-08-19

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Legal Events

Date Code Title Description
OAM Search report available
OC Search report available
8110 Request for examination paragraph 44
8126 Change of the secondary classification

Ipc: G01V 3/12

8128 New person/name/address of the agent

Representative=s name: KUCHER, H., DIPL.-ING., PAT.-ANW., 7410 REUTLINGEN

D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee