NL7903965A - Systeem en werkwijze voor identificatie van voorwerpen met geleidende eigenschappen. - Google Patents

Systeem en werkwijze voor identificatie van voorwerpen met geleidende eigenschappen. Download PDF

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Publication number
NL7903965A
NL7903965A NL7903965A NL7903965A NL7903965A NL 7903965 A NL7903965 A NL 7903965A NL 7903965 A NL7903965 A NL 7903965A NL 7903965 A NL7903965 A NL 7903965A NL 7903965 A NL7903965 A NL 7903965A
Authority
NL
Netherlands
Prior art keywords
bobbin
frequency
resistance component
identification system
set forth
Prior art date
Application number
NL7903965A
Other languages
English (en)
Dutch (nl)
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 NL7903965A publication Critical patent/NL7903965A/nl

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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)
NL7903965A 1978-08-25 1979-05-21 Systeem en werkwijze voor identificatie van voorwerpen met geleidende eigenschappen. NL7903965A (nl)

Applications Claiming Priority (2)

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
DE2837265 1978-08-25

Publications (1)

Publication Number Publication Date
NL7903965A true NL7903965A (nl) 1980-11-25

Family

ID=6047949

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7903965A NL7903965A (nl) 1978-08-25 1979-05-21 Systeem en werkwijze voor identificatie van voorwerpen met geleidende eigenschappen.

Country Status (7)

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

Families Citing this family (19)

* 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
DE3674675D1 (de) * 1985-02-15 1990-11-08 Broken Hill Pty Co Ltd Klassifizierung von stahl.
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
US7450052B2 (en) 1999-05-25 2008-11-11 The Macaleese Companies, Inc. Object detection method and apparatus
US7167123B2 (en) 1999-05-25 2007-01-23 Safe Zone Systems, Inc. Object detection method and apparatus
DE19954716B4 (de) * 1999-11-13 2006-08-31 Mesutronic Gerätebau GmbH Funktionsprüfung für einen Metalldetektor
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
CN103180760B (zh) 2010-10-07 2016-10-26 梅特勒-托利多安全线有限公司 用于操作金属探测系统的方法以及金属探测系统
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
US9028441B2 (en) 2011-09-08 2015-05-12 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

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
FR2456951B1 (xx) 1985-04-19
SE7904329L (sv) 1980-11-18
SE440832B (sv) 1985-08-19
FR2456951A1 (fr) 1980-12-12
DE2837265A1 (de) 1980-03-06
GB1603578A (en) 1981-11-25
CH660799A5 (en) 1987-06-15
DE2837265C2 (de) 1987-02-05

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Legal Events

Date Code Title Description
A85 Still pending on 85-01-01
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
BV The patent application has lapsed