CA952195A - Harmonic flux gate magnetometers and gradiometers - Google Patents

Harmonic flux gate magnetometers and gradiometers

Info

Publication number
CA952195A
CA952195A CA093,952A CA93952A CA952195A CA 952195 A CA952195 A CA 952195A CA 93952 A CA93952 A CA 93952A CA 952195 A CA952195 A CA 952195A
Authority
CA
Canada
Prior art keywords
gradiometers
flux gate
harmonic flux
gate magnetometers
magnetometers
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
CA093,952A
Inventor
James R. Jaquet
Malcolm M. Schwartz
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.)
INFINETICS
Original Assignee
INFINETICS
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 INFINETICS filed Critical INFINETICS
Priority to CA201,803A priority Critical patent/CA975426A/en
Application granted granted Critical
Publication of CA952195A publication Critical patent/CA952195A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/022—Measuring gradient
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/04—Measuring direction or magnitude of magnetic fields or magnetic flux using the flux-gate principle
    • G01R33/045—Measuring direction or magnitude of magnetic fields or magnetic flux using the flux-gate principle in single-, or multi-aperture elements
    • 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
    • G01V3/15—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat
CA093,952A 1970-01-26 1970-09-24 Harmonic flux gate magnetometers and gradiometers Expired CA952195A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA201,803A CA975426A (en) 1970-01-26 1974-06-06 Harmonic flux gate magnetometers and gradiometers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/005,751 US4068164A (en) 1970-01-26 1970-01-26 Harmoic flux gate magnetometers and gradimeters and windings

Publications (1)

Publication Number Publication Date
CA952195A true CA952195A (en) 1974-07-30

Family

ID=21717544

Family Applications (1)

Application Number Title Priority Date Filing Date
CA093,952A Expired CA952195A (en) 1970-01-26 1970-09-24 Harmonic flux gate magnetometers and gradiometers

Country Status (2)

Country Link
US (1) US4068164A (en)
CA (1) CA952195A (en)

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US4527123A (en) * 1980-07-08 1985-07-02 Sentronic Of California Incorporated Improved method and apparatus for detecting and locating residually magnetized items
US4825166A (en) * 1987-01-27 1989-04-25 Sundstrand Data Control, Inc. Bobbin for a magnetic sensor
FR2624620A1 (en) * 1987-12-10 1989-06-16 Imtec Sa Device for detecting at least partially metal foreign objects, in particular in an operating environment
FR2665543B1 (en) * 1990-08-02 1993-02-19 Lethiec Philippe HIGH SENSITIVITY MAGNETIC FIELD SENSOR.
US5790685A (en) * 1995-06-29 1998-08-04 Tracor, Inc. Apparatus and method for detecting and imaging metal
US5670882A (en) * 1995-09-21 1997-09-23 Magnawand Inc. Ferrous target identification system with magnetic field polarity and gradient indication
US5986446A (en) * 1997-02-05 1999-11-16 C. Blake Williamson Multi-meter and probe assembly and method of use
US6150810A (en) * 1997-03-24 2000-11-21 Bechtel Bwxt Idaho, Llc Method for detecting the presence of a ferromagnetic object using maximum and minimum magnetic field data
EP1014101A3 (en) * 1998-12-21 2004-11-03 Sura Magnets AB Magnetic testing apparatus
US6456069B1 (en) 1999-03-05 2002-09-24 The United States Of America As Represented By The Secretary Of The Navy Fluxgate magnetic field sensor incorporating ferromagnetic test material into its magnetic circuitry
US6417665B1 (en) 1999-03-05 2002-07-09 The United States Of America As Represented By The Secretary Of The Navy Spatially integrating fluxgate manetometer having a flexible magnetic core
US6278272B1 (en) 1999-03-05 2001-08-21 The United States Of America As Represented By The Secretary Of The Navy Integrating fluxgate magnetometer
US6133829A (en) * 1999-03-05 2000-10-17 Frl, Inc. Walk-through metal detector system and method
FR2798475B1 (en) * 1999-09-14 2001-10-19 Christophe Cayrol DEVICE FOR ADVISING A PERSON MOVING ON A GIVEN PATH, OF THE PRESENCE, ON THIS PATH, OF OBJECTS POSSIBLY POSING A DANGER FOR THEM
US7154266B2 (en) * 2003-01-17 2006-12-26 Quantum Magnetics, Inc. Screening method and apparatus
US7315166B2 (en) 2003-01-17 2008-01-01 Mednovus, Inc. Magnetic resonance imaging screening method and apparatus
US7239134B2 (en) 2003-01-17 2007-07-03 Mednovus, Inc. Screening method and apparatus
US6956369B2 (en) * 2003-01-17 2005-10-18 Mednovus, Inc. Screening method and apparatus
US20060022670A1 (en) * 2004-07-31 2006-02-02 Mednovus, Inc. Magnetic resonance screening portal with combination sensing
US7239223B2 (en) * 2004-10-18 2007-07-03 Mednovus, Inc. Enhancement magnetizer for magnetic resonance imaging screening
US20060139025A1 (en) * 2004-12-24 2006-06-29 Mednovus, Inc. Saturation-resistant magnetoresistive sensor for ferromagnetic screening
US20060145691A1 (en) * 2004-12-30 2006-07-06 Mednovus, Inc. Ferromagnetic detection pillar and variable aperture portal
US7295107B2 (en) * 2004-12-30 2007-11-13 Mednovus, Inc. Ferromagnetic detection pillar
US7408461B2 (en) * 2005-01-11 2008-08-05 Controlled Capture Systems, Llc Metal detection system and method
US20070057786A1 (en) * 2005-09-13 2007-03-15 Mednovus, Inc. Ferromagnetic threat warning system
US20080281187A1 (en) * 2006-10-18 2008-11-13 Mednovus, Inc. Ferromagnetic threat detection method apparatus
US9618624B2 (en) 2010-10-07 2017-04-11 Okm Gmbh Sports- and general pole element including arrangement for operating a handheld geophysical locating device
DE202010014054U1 (en) * 2010-10-07 2011-02-17 Okm Gmbh Arrangement for operating a hand-held geophysical locating device
US20130307533A1 (en) 2012-05-18 2013-11-21 Metrasens Limited Security system and method of detecting contraband items
GB201219097D0 (en) 2012-10-24 2012-12-05 Metrasens Ltd Apparatus for detecting ferromagnetic objects at a protected doorway assembly
WO2016097724A1 (en) 2014-12-18 2016-06-23 Metrasens Limited Security system and method of detecting contraband items
GB201602652D0 (en) 2016-02-15 2016-03-30 Metrasens Ltd Improvements to magnetic detectors
AU2020271483A1 (en) * 2019-01-27 2021-09-16 Tesseract Sensors, LLC Systems and methods for weapon and destructive device detection based on electromagnetic field profile

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1842471A (en) * 1930-06-13 1932-01-26 Abraham L Eliasoff Electrically illuminated tool device
US2129058A (en) * 1936-07-11 1938-09-06 Charles A Hedden Transformer for a metal locator
US2966853A (en) * 1941-10-27 1961-01-03 Jr Edward S Gilfillan Buoyant mine with gradiometer
US2794166A (en) * 1954-05-04 1957-05-28 William S Ferdon Walking sticks for the blind
US3050679A (en) * 1960-02-18 1962-08-21 Erick O Schonstedt Device for detecting or measuring magnetic fields
US3281660A (en) * 1964-05-28 1966-10-25 David K Studenick Locator for magnetic and conducting materials including means for adjusting the relative positions of a pair of sensing coils
US3292080A (en) * 1964-11-23 1966-12-13 Emmanuel M Trikilis System and method for preventing pilferage by detection of magnetic fields
US3249915A (en) * 1965-04-20 1966-05-03 Trw Inc Method and apparatus for vehicle detection
US3319161A (en) * 1966-01-19 1967-05-09 Bunker Ramo Flux gate magnetometer utilizing a thin helical strip of magnetic material as its core
US3528402A (en) * 1966-02-02 1970-09-15 William L Abramowitz Means and method for internally detecting the presence of an intrauterine contraceptive device
US3434047A (en) * 1966-07-25 1969-03-18 Precision Winding Co Inc Magnetic field sensing and measuring apparatus
US3487459A (en) * 1968-03-28 1969-12-30 Erick O Schonstedt Induced magnetic compensation for misalignment of magnetic gradiometer sensors

Also Published As

Publication number Publication date
US4068164A (en) 1978-01-10

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