SE9901480D0 - Metal Detector - Google Patents

Metal Detector

Info

Publication number
SE9901480D0
SE9901480D0 SE9901480A SE9901480A SE9901480D0 SE 9901480 D0 SE9901480 D0 SE 9901480D0 SE 9901480 A SE9901480 A SE 9901480A SE 9901480 A SE9901480 A SE 9901480A SE 9901480 D0 SE9901480 D0 SE 9901480D0
Authority
SE
Sweden
Prior art keywords
loop
current
detector
detecting
generated
Prior art date
Application number
SE9901480A
Other languages
Swedish (sv)
Other versions
SE9901480L (en
Inventor
Lennarth Eliasson
Original Assignee
Lennarth Eliasson
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 Lennarth Eliasson filed Critical Lennarth Eliasson
Priority to SE9901480A priority Critical patent/SE9901480L/en
Publication of SE9901480D0 publication Critical patent/SE9901480D0/en
Priority to PCT/SE2000/000770 priority patent/WO2000065379A1/en
Priority to AU46345/00A priority patent/AU4634500A/en
Publication of SE9901480L publication Critical patent/SE9901480L/en

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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (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)

Abstract

The invention concerns a detecting device for detection of introduction and/or removal of metal objects into/from a sensing area surrounding the detector, said detector comprising a first loop and a drive circuit to pass a current through said first loop. The device in accordance with the invention is characterised in that it further comprises a second loop arranged in such a manner relative to the first loop that, in a normal state without the presence of metal objects, substantially no current is generated in the second loop from the magnetic field of the first loop but that in a state of interference, in which a metal object is entered into the sensing area, a current is generated in the second loop, and in that the device further comprises a detecting unit for detecting modifications arising in the current in the second loop.
SE9901480A 1999-04-23 1999-04-23 Metal Detector SE9901480L (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9901480A SE9901480L (en) 1999-04-23 1999-04-23 Metal Detector
PCT/SE2000/000770 WO2000065379A1 (en) 1999-04-23 2000-04-20 Metal detector
AU46345/00A AU4634500A (en) 1999-04-23 2000-04-20 Metal detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9901480A SE9901480L (en) 1999-04-23 1999-04-23 Metal Detector

Publications (2)

Publication Number Publication Date
SE9901480D0 true SE9901480D0 (en) 1999-04-23
SE9901480L SE9901480L (en) 2000-10-24

Family

ID=20415341

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9901480A SE9901480L (en) 1999-04-23 1999-04-23 Metal Detector

Country Status (3)

Country Link
AU (1) AU4634500A (en)
SE (1) SE9901480L (en)
WO (1) WO2000065379A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10191177B2 (en) 2011-11-11 2019-01-29 Nokia Technologies Oy Apparatus and a method for metal detection involving a mobile terminal with a display

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5576621A (en) * 1994-03-10 1996-11-19 Denver Dynamics, Inc. Hinged metal detection cover for a receptacle
JPH08101279A (en) * 1994-09-30 1996-04-16 Anritsu Corp Metal detector

Also Published As

Publication number Publication date
WO2000065379A1 (en) 2000-11-02
SE9901480L (en) 2000-10-24
AU4634500A (en) 2000-11-10

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