AT23756T - Metal detector. - Google Patents

Metal detector.

Info

Publication number
AT23756T
AT23756T AT82300613T AT82300613T AT23756T AT 23756 T AT23756 T AT 23756T AT 82300613 T AT82300613 T AT 82300613T AT 82300613 T AT82300613 T AT 82300613T AT 23756 T AT23756 T AT 23756T
Authority
AT
Austria
Prior art keywords
metal detector
detector
metal
Prior art date
Application number
AT82300613T
Other languages
German (de)
Inventor
Bruce Goring Kerr
Original Assignee
Goring Kerr Ltd
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 GB8103943 priority Critical
Application filed by Goring Kerr Ltd filed Critical Goring Kerr Ltd
Priority to EP82300613A priority patent/EP0058076B1/en
Publication of AT23756T publication Critical patent/AT23756T/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
    • G01V3/00Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08Electric 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
    • G01V3/10Electric 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
    • G01V3/104Electric 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
    • G01V3/105Electric 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
    • G01V3/107Electric 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 using compensating coil or loop arrangements
AT82300613T 1981-02-09 1982-02-08 Metal detector. AT23756T (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8103943 1981-02-09
EP82300613A EP0058076B1 (en) 1981-02-09 1982-02-08 Metal detection apparatus

Publications (1)

Publication Number Publication Date
AT23756T true AT23756T (en) 1986-12-15

Family

ID=10519564

Family Applications (1)

Application Number Title Priority Date Filing Date
AT82300613T AT23756T (en) 1981-02-09 1982-02-08 Metal detector.

Country Status (6)

Country Link
US (2) US4563645A (en)
EP (1) EP0058076B1 (en)
JP (1) JPS57189084A (en)
AT (1) AT23756T (en)
CA (1) CA1194177A (en)
DE (1) DE3274391D1 (en)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
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US4709213A (en) * 1982-07-23 1987-11-24 Garrett Electronics, Inc. Metal detector having digital signal processing
GB2147706B (en) * 1983-04-21 1987-02-04 John Hugh Davey Walton Apparatus for balancing an electrical network
US4613815A (en) * 1983-04-27 1986-09-23 Pall Corporation Electromagnetic detector for metallic materials having an improved phase detection circuit
JPH0229997B2 (en) * 1983-10-05 1990-07-03 Anritsu Corp
GB8407009D0 (en) * 1984-03-17 1984-04-18 Parkway Instr Co Operative Ltd Locating and detecting metal objects
GB2165650B (en) * 1984-04-09 1988-04-27 Dennis Amerena Parker Method and apparatus for the quantative and qualitative measurement of small metal particles
GB8517257D0 (en) * 1985-07-08 1985-08-14 Goring Kerr Plc Metal detector
US4959636A (en) * 1987-12-17 1990-09-25 Detection Systems Pty. Ltd. Search head for metal detectors
WO1991004502A1 (en) * 1989-09-12 1991-04-04 Bayliss Electronic Industries Pty. Ltd. Induced field mineral value detector
US5432444A (en) * 1990-10-23 1995-07-11 Kaisei Engineer Co., Ltd. Inspection device having coaxial induction and exciting coils forming a unitary coil unit
EP0543648A1 (en) * 1991-11-21 1993-05-26 Kaisei Engineer Co., Ltd. Inspection device using electromagnetic induction and method therefor
US5721489A (en) * 1995-10-06 1998-02-24 Garrett Electronics, Inc. Metal detector method for identifying target size
US5691640A (en) * 1995-11-17 1997-11-25 Ramsey Technology, Inc. Forced balance metal detector
US6130539A (en) * 1998-08-19 2000-10-10 Metrotech Corporation Automatic gain control for a line locator
US6407550B1 (en) 1998-08-19 2002-06-18 Metrotech Corporation Line locator with accurate horizontal displacement detection
US6268724B1 (en) 1999-06-21 2001-07-31 Quantum Magnetics Device for selectively detecting metal objects
GB2361544B (en) * 2000-04-20 2004-07-07 Goring Kerr Ltd Metal detector
GB0023303D0 (en) * 2000-09-22 2000-11-08 Safeline Ltd Metal detector
DE10122741A1 (en) * 2001-05-10 2002-11-14 Bosch Gmbh Robert Detector for locating metallic objects
US6803757B2 (en) 2001-10-02 2004-10-12 Bentley Nevada, Llc Multi-coil eddy current proximity probe system
GB0201465D0 (en) * 2002-01-23 2002-03-13 Roke Manor Research Pre-mri metal detector
FR2907223B1 (en) * 2006-10-13 2009-04-03 Areva Np Sas Method and device for detecting structural anomalies in a spherical particle, in particular in a nuclear fuel particle for reactors at high temperature or very high temperature.
US20080297158A1 (en) * 2007-05-31 2008-12-04 Zircon Corporation Gradiometric Directional Metal Detector
US7893690B2 (en) * 2007-07-19 2011-02-22 Carnes Company, Inc. Balancing circuit for a metal detector
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
DE102010042512A1 (en) * 2010-10-15 2012-04-19 Ifm Electronic Gmbh Inductive proximity switch for use as non-contact electronic switch in automation control technology, has Schmitt trigger that converts analog control signal into pulse-width modulated signal, so that received signal is regulated
DE102010042511A1 (en) * 2010-10-15 2012-04-19 Ifm Electronic Gmbh Inductive proximity switch for use as contactlessly working electronic switching device in automation application, has control loop controlling reception signal to zero, and balancing coil electric circuit including current measurement unit
EP3698889A1 (en) 2011-06-29 2020-08-26 Minesense Technologies Ltd. Extracting mined ore, minerals or other materials using sensor-based sorting
US9316537B2 (en) 2011-06-29 2016-04-19 Minesense Technologies Ltd. Sorting materials using a pattern recognition, such as upgrading nickel laterite ores through electromagnetic sensor-based methods
EP2544027A1 (en) 2011-07-08 2013-01-09 Mettler-Toledo Safeline Limited Metal detector for production and packaging lines
DE102011088406A1 (en) * 2011-12-13 2013-06-13 Robert Bosch Gmbh Metal sensor
GB2499239B (en) * 2012-02-10 2014-02-12 Illinois Tool Works Metal detector
AU2013201330B2 (en) * 2012-03-06 2015-03-05 Minelab Electronics Pty Limited A method for detecting fast time constant targets using a metal detector
DK2844403T3 (en) 2012-05-01 2018-09-17 Minesense Tech Ltd High capacity cascade mineral sorting machine
US9236861B2 (en) 2012-07-02 2016-01-12 Stmicroelectronics Asia Pacific Pte Ltd Capacitive proximity sensor with enabled touch detection
US9176597B2 (en) * 2012-07-02 2015-11-03 Stmicroelectronics Asia Pacific Pte Ltd Directional capacitive proximity sensor with bootstrapping
US9164629B2 (en) 2012-08-06 2015-10-20 Stmicroelectronics Asia Pacific Pte Ltd Touch screen panel with slide feature
US9557390B2 (en) * 2012-08-29 2017-01-31 Minelab Electronics Pty Limited Noise reduction circuitry for a metal detector
GB2506931B (en) 2012-10-15 2014-08-27 Illinois Tool Works Metal detector
GB201302809D0 (en) * 2013-02-18 2013-04-03 Roke Manor Research An object detector
US9454272B2 (en) 2014-05-22 2016-09-27 Stmicroelectronics Asia Pacific Pte Ltd Touch screen for stylus emitting wireless signals
WO2016011551A1 (en) 2014-07-21 2016-01-28 Minesense Technologies Ltd. High capacity separation of coarse ore minerals from waste minerals
EP3172384A4 (en) 2014-07-21 2018-02-28 Minesense Technologies Ltd. Mining shovel with compositional sensors

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2744232A (en) * 1952-03-06 1956-05-01 Elbert N Shawhan Magnetic and conducting materials detector
US2858505A (en) * 1953-09-18 1958-10-28 Sun Oil Co Apparatus for the detection of foreign bodies
US2888026A (en) * 1957-09-16 1959-05-26 Reserve Mining Co Automatic material proportioning system
US3573784A (en) * 1968-10-02 1971-04-06 Henry L Bachofer Metal detecting apparatus for conveyor belt
US3614600A (en) * 1969-07-31 1971-10-19 Geonics Ltd Electromagnetic prospecting apparatus for detecting electrically or magnetically responsive ore bodies
US3676772A (en) * 1970-08-18 1972-07-11 Nasa Metallic intrusion detector system
GB1370233A (en) * 1972-01-06 1974-10-16 Goring Kerr Ltd Electrical sorting apparatus
US3826973A (en) * 1973-01-10 1974-07-30 Benson R Electromagnetic gradiometer
GB1490191A (en) * 1975-01-16 1977-10-26 Plessey Co Ltd Metal detectors
US4006407A (en) * 1975-03-10 1977-02-01 Magnaflux Corporation Non-destructive testing systems having automatic balance and sample and hold operational modes
US4099116A (en) * 1977-01-17 1978-07-04 Tyndall Jerry C Metal detector with phase related circuit selective discrimination
JPS53114497A (en) * 1977-02-17 1978-10-05 Densoku Kougiyou Kk Balanceeregulated circuit for metal detector
GB2025630B (en) * 1977-11-10 1982-06-30 Goring Kerr Ltd Electrical bridge circuit with compensation for long-term drift
DE2825958C2 (en) * 1978-06-14 1986-02-20 Institut Dr. Friedrich Foerster Pruefgeraetebau Gmbh & Co Kg, 7410 Reutlingen, De
FR2443682B1 (en) * 1978-12-07 1982-03-26 Commissariat Energie Atomique
US4300097A (en) * 1979-07-27 1981-11-10 Techna, Inc. Induction balance metal detector with ferrous and non-ferrous metal identification

Also Published As

Publication number Publication date
EP0058076A2 (en) 1982-08-18
US4563645A (en) 1986-01-07
JPS57189084A (en) 1982-11-20
US4659989A (en) 1987-04-21
DE3274391D1 (en) 1987-01-08
EP0058076A3 (en) 1982-08-25
CA1194177A (en) 1985-09-24
EP0058076B1 (en) 1986-11-20
CA1194177A1 (en)

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee