NL8201811A - Stelsel voor het detecteren van metalen voorwerpen. - Google Patents

Stelsel voor het detecteren van metalen voorwerpen. Download PDF

Info

Publication number
NL8201811A
NL8201811A NL8201811A NL8201811A NL8201811A NL 8201811 A NL8201811 A NL 8201811A NL 8201811 A NL8201811 A NL 8201811A NL 8201811 A NL8201811 A NL 8201811A NL 8201811 A NL8201811 A NL 8201811A
Authority
NL
Netherlands
Prior art keywords
signal
coil
headpiece
amplitude
field generated
Prior art date
Application number
NL8201811A
Other languages
English (en)
Dutch (nl)
Original Assignee
Bofors Ab
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 Bofors Ab filed Critical Bofors Ab
Publication of NL8201811A publication Critical patent/NL8201811A/nl

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

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)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
NL8201811A 1981-05-06 1982-05-03 Stelsel voor het detecteren van metalen voorwerpen. NL8201811A (nl)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8102827A SE426269B (sv) 1981-05-06 1981-05-06 Anordning vid detektering av metallforemal
SE8102827 1981-05-06

Publications (1)

Publication Number Publication Date
NL8201811A true NL8201811A (nl) 1982-12-01

Family

ID=20343740

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8201811A NL8201811A (nl) 1981-05-06 1982-05-03 Stelsel voor het detecteren van metalen voorwerpen.

Country Status (11)

Country Link
JP (1) JPS57192887A (de)
BE (1) BE893088A (de)
CA (1) CA1198165A (de)
CH (1) CH656231A5 (de)
DE (1) DE3217033A1 (de)
FR (1) FR2505508B1 (de)
GB (1) GB2097933B (de)
IT (1) IT1147941B (de)
NL (1) NL8201811A (de)
NO (1) NO821485L (de)
SE (1) SE426269B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141001A (ja) * 1983-02-01 1984-08-13 Mitsubishi Electric Corp 金属管の有効端末位置検出方法
SE470289B (sv) * 1992-11-04 1994-01-10 Bofors Ab Magnetiskt zonrör
US5426363A (en) * 1993-04-26 1995-06-20 Kabushiki Kaisha Honda Denshi Giken Object detecting device
AU2009262370B2 (en) * 2008-06-27 2014-11-27 Minelab Electronics Pty Limited Constant current metal detector with driven transmit coil

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB835128A (en) * 1955-09-17 1960-05-18 Asea Ab Apparatus for examining a substance utilising the effect of the substance on the q factor of a resonant circuit
DE2052989C3 (de) * 1970-10-30 1973-11-08 Guenther Dipl.-Ing. 2209 Sushoern Weber Durch einen oder mehrere sich be wegende Gegenstande auslosbares Schalt gerat
GB1448877A (en) * 1973-09-04 1976-09-08 Weber G Electronic switching device for sensing a body and for converting such sensing into an electrical signal
GB1561641A (en) * 1976-08-05 1980-02-27 Redland Automation Ltd Presence detector apparatus
LU75628A1 (de) * 1976-08-19 1978-04-13
DE2722511A1 (de) * 1977-05-18 1978-11-30 Voll Walter Metallsuchgeraet
DE2722498C3 (de) * 1977-05-18 1982-02-04 Walter Ing.(Grad.) 8728 Hassfurt Voll Einrichtung an einem Kraftfahrzeug zur Anzeige eines Mindestabstandes

Also Published As

Publication number Publication date
GB2097933A (en) 1982-11-10
IT8248333A0 (it) 1982-05-05
SE8102827L (sv) 1982-11-07
IT1147941B (it) 1986-11-26
CA1198165A (en) 1985-12-17
FR2505508A1 (fr) 1982-11-12
DE3217033A1 (de) 1982-11-25
JPS57192887A (en) 1982-11-27
CH656231A5 (de) 1986-06-13
NO821485L (no) 1982-11-08
FR2505508B1 (fr) 1985-11-29
BE893088A (fr) 1982-08-30
DE3217033C2 (de) 1991-01-03
GB2097933B (en) 1985-05-15
SE426269B (sv) 1982-12-20

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Legal Events

Date Code Title Description
A85 Still pending on 85-01-01
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
BV The patent application has lapsed