CA1157096A - Systems and method for identifying objects having conductive properties - Google Patents
Systems and method for identifying objects having conductive propertiesInfo
- Publication number
- CA1157096A CA1157096A CA000326644A CA326644A CA1157096A CA 1157096 A CA1157096 A CA 1157096A CA 000326644 A CA000326644 A CA 000326644A CA 326644 A CA326644 A CA 326644A CA 1157096 A CA1157096 A CA 1157096A
- Authority
- CA
- Canada
- Prior art keywords
- coil
- frequency
- phase
- resistive component
- output
- 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
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)
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 (1)
Publication Number | Publication Date |
---|---|
CA1157096A true CA1157096A (en) | 1983-11-15 |
Family
ID=6047949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000326644A Expired CA1157096A (en) | 1978-08-25 | 1979-04-30 | Systems and method for identifying objects having conductive properties |
Country Status (7)
Country | Link |
---|---|
CA (1) | CA1157096A (de) |
CH (1) | CH660799A5 (de) |
DE (1) | DE2837265C2 (de) |
FR (1) | FR2456951A1 (de) |
GB (1) | GB1603578A (de) |
NL (1) | NL7903965A (de) |
SE (1) | SE440832B (de) |
Families Citing this family (19)
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 (de) * | 1985-02-15 | 1990-10-03 | The Broken Hill Proprietary Company Limited | 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 |
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 |
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 |
EP2439560B1 (de) | 2010-10-07 | 2013-05-29 | Mettler-Toledo Safeline Limited | Verfahren für den Betrieb eines Metalldetektionssystems und Metalldetektionssystem |
EP2439559B1 (de) | 2010-10-07 | 2013-05-29 | Mettler-Toledo Safeline Limited | Verfahren für den Betrieb eines Metalldetektionssystems und Metalldetektionssystem |
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 |
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)
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 |
-
1978
- 1978-05-11 GB GB1906478A patent/GB1603578A/en not_active Expired
- 1978-08-25 DE DE19782837265 patent/DE2837265C2/de not_active Expired
-
1979
- 1979-04-30 CA CA000326644A patent/CA1157096A/en not_active Expired
- 1979-05-15 FR FR7912313A patent/FR2456951A1/fr active Granted
- 1979-05-17 SE SE7904329A patent/SE440832B/sv not_active IP Right Cessation
- 1979-05-21 CH CH471579A patent/CH660799A5/de not_active IP Right Cessation
- 1979-05-21 NL NL7903965A patent/NL7903965A/nl not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CH660799A5 (en) | 1987-06-15 |
GB1603578A (en) | 1981-11-25 |
FR2456951A1 (fr) | 1980-12-12 |
SE440832B (sv) | 1985-08-19 |
DE2837265C2 (de) | 1987-02-05 |
NL7903965A (nl) | 1980-11-25 |
FR2456951B1 (de) | 1985-04-19 |
DE2837265A1 (de) | 1980-03-06 |
SE7904329L (sv) | 1980-11-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |