DE3274391D1 - Metal detection apparatus - Google Patents

Metal detection apparatus

Info

Publication number
DE3274391D1
DE3274391D1 DE8282300613T DE3274391T DE3274391D1 DE 3274391 D1 DE3274391 D1 DE 3274391D1 DE 8282300613 T DE8282300613 T DE 8282300613T DE 3274391 T DE3274391 T DE 3274391T DE 3274391 D1 DE3274391 D1 DE 3274391D1
Authority
DE
Germany
Prior art keywords
metal
detected
circuits
output
nominally zero
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
DE8282300613T
Other languages
English (en)
Inventor
Bruce Goring Kerr
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.)
Thermo Electron Weighing and Inspection Ltd
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
Application filed by Goring Kerr Ltd filed Critical Goring Kerr Ltd
Application granted granted Critical
Publication of DE3274391D1 publication Critical patent/DE3274391D1/de
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01V3/107—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 using compensating coil or loop arrangements

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Electromagnetism (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
DE8282300613T 1981-02-09 1982-02-08 Metal detection apparatus Expired DE3274391D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8103943 1981-02-09

Publications (1)

Publication Number Publication Date
DE3274391D1 true DE3274391D1 (en) 1987-01-08

Family

ID=10519564

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8282300613T Expired DE3274391D1 (en) 1981-02-09 1982-02-08 Metal detection apparatus

Country Status (6)

Country Link
US (2) US4563645A (de)
EP (1) EP0058076B1 (de)
JP (1) JPS57189084A (de)
AT (1) ATE23756T1 (de)
CA (1) CA1194177A (de)
DE (1) DE3274391D1 (de)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPS6078378A (ja) * 1983-10-05 1985-05-04 Anritsu Corp 金属検出装置
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 (de) * 1991-11-21 1993-05-26 Kaisei Engineer Co., Ltd. Inspektionsvorrichtung und Methode unter Verwendung elektromagnetischer Induktion
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 (de) * 2001-05-10 2002-11-14 Bosch Gmbh Robert Detektor zur Ortung metallischer Gegenstände
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 (fr) * 2006-10-13 2009-04-03 Areva Np Sas Procede et dispositif de detection d'anomalies structurelles dans une particule spherique,notamment dans une particule de combustible nucleaire pour reacteurs a haute temperature ou tres haute 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 (de) * 2010-10-07 2013-05-29 Mettler-Toledo Safeline Limited Verfahren für den Betrieb eines Metalldetektionssystems und Metalldetektionssystem
DE102010042511A1 (de) * 2010-10-15 2012-04-19 Ifm Electronic Gmbh Induktiver Näherungsschalter
DE102010042512A1 (de) * 2010-10-15 2012-04-19 Ifm Electronic Gmbh Induktiver Näherungsschalter
CA2840545C (en) 2011-06-29 2017-06-13 Minesense Technologies Ltd. Extracting mined ore, minerals or other materials using sensor-based sorting
US11219927B2 (en) 2011-06-29 2022-01-11 Minesense Technologies Ltd. Sorting materials using pattern recognition, such as upgrading nickel laterite ores through electromagnetic sensor-based methods
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
US9314823B2 (en) 2011-06-29 2016-04-19 Minesense Technologies Ltd. High capacity cascade-type mineral sorting machine and method
EP2544027A1 (de) * 2011-07-08 2013-01-09 Mettler-Toledo Safeline Limited Metalldetektor für Produktions- und Verpackungslinien
DE102011088406A1 (de) * 2011-12-13 2013-06-13 Robert Bosch Gmbh Metallsensor
CA2859084C (en) 2012-02-10 2017-11-21 Illinois Tool Works Inc. Metal detector
GB2499239B (en) * 2012-02-10 2014-02-12 Illinois Tool Works Metal detector
US9547065B2 (en) * 2012-03-06 2017-01-17 Minelab Electronics Pty Limited Method for detecting fast time constant targets using a metal detector
US9176597B2 (en) * 2012-07-02 2015-11-03 Stmicroelectronics Asia Pacific Pte Ltd Directional capacitive proximity sensor with bootstrapping
US9236861B2 (en) 2012-07-02 2016-01-12 Stmicroelectronics Asia Pacific Pte Ltd Capacitive proximity sensor with enabled touch detection
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
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
EP3171989B1 (de) 2014-07-21 2023-10-11 Minesense Technologies Ltd. Hochkapazitätstrennung von groben erzmineralien aus abfallmineralien
AU2015292229A1 (en) 2014-07-21 2017-02-09 Minesense Technologies Ltd. Mining shovel with compositional sensors
EP3415902B1 (de) * 2017-06-14 2023-12-27 Rolls-Royce Corporation System zur zerstörungsfreien restspannungsprofilierung mittels induktiver messung

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 (de) * 1978-06-14 1986-02-20 Institut Dr. Friedrich Förster Prüfgerätebau GmbH & Co KG, 7410 Reutlingen Magnetisches oder magnetinduktives Werkstoffprüfgerät mit Nullpunktkompensationseinrichtung
FR2443682A1 (fr) * 1978-12-07 1980-07-04 Commissariat Energie Atomique Circuit de correction automatique d'un signal emis par un capteur differentiel desequilibre
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
EP0058076B1 (de) 1986-11-20
CA1194177A (en) 1985-09-24
US4659989A (en) 1987-04-21
EP0058076A2 (de) 1982-08-18
JPS57189084A (en) 1982-11-20
EP0058076A3 (en) 1982-08-25
US4563645A (en) 1986-01-07
ATE23756T1 (de) 1986-12-15

Similar Documents

Publication Publication Date Title
DE3274391D1 (en) Metal detection apparatus
EP0196912B1 (de) Kapazitive Brücke
ES8404535A1 (es) Detector de humos basado en el principado de la extincion de radiacion.
US3548296A (en) Method and apparatus for controlling the phase angle and amplitude of a periodic signal by using two phases of a reference signal
KR900016919A (ko) 경화 판별장치
GB1212356A (en) Improvements in or relating to zero compensation in modulated carrier measuring systems
US3522528A (en) Noncontacting capacitance distance gauge having a servosystem and a position sensor
JPS6465484A (en) Metal detector
US2624778A (en) Electronic fluxmeter and alternating current amplifier
GB1464656A (en) Apparatus and method for monitoring the square of the strength of a magnetic field
SU1195803A1 (ru) Металлоискатель
GB846018A (en) Detection system
SU824144A2 (ru) Система управлени вибростендом
SU1594477A1 (ru) Устройство дл аэрогеоэлектроразведки
JPS57118413A (en) Automatic gain controlling system
US3398354A (en) Voltage control apparatus
GB984526A (en) Improvements in or relating to apparatus operated by variations of capacitance
SU949333A1 (ru) Тензометрический усилитель
SU1441181A1 (ru) Устройство дл измерени радиуса цилиндрических неферромагнитных тел
SU1497470A1 (ru) Измерительное устройство к балансировочному станку
SU1469371A1 (ru) Устройство дл определени дисбаланса роторов
JPS6465485A (en) Metal detector
SU1117559A1 (ru) Вихретоковый металлоискатель
JPS5672355A (en) Automatic compensation system for conductivity meter
JPS5739345A (en) Eddy current flaw detector

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee