FR2505508B1 - METAL OBJECT DETECTION DEVICE - Google Patents

METAL OBJECT DETECTION DEVICE

Info

Publication number
FR2505508B1
FR2505508B1 FR8207818A FR8207818A FR2505508B1 FR 2505508 B1 FR2505508 B1 FR 2505508B1 FR 8207818 A FR8207818 A FR 8207818A FR 8207818 A FR8207818 A FR 8207818A FR 2505508 B1 FR2505508 B1 FR 2505508B1
Authority
FR
France
Prior art keywords
detection device
object detection
metal object
metal
detection
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
FR8207818A
Other languages
French (fr)
Other versions
FR2505508A1 (en
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.)
Saab Bofors AB
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 FR2505508A1 publication Critical patent/FR2505508A1/en
Application granted granted Critical
Publication of FR2505508B1 publication Critical patent/FR2505508B1/en
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

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)
FR8207818A 1981-05-06 1982-05-05 METAL OBJECT DETECTION DEVICE Expired FR2505508B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8102827A SE426269B (en) 1981-05-06 1981-05-06 DEVICE FOR THE DETECTION OF METAL FORMS

Publications (2)

Publication Number Publication Date
FR2505508A1 FR2505508A1 (en) 1982-11-12
FR2505508B1 true FR2505508B1 (en) 1985-11-29

Family

ID=20343740

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8207818A Expired FR2505508B1 (en) 1981-05-06 1982-05-05 METAL OBJECT DETECTION DEVICE

Country Status (11)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59141001A (en) * 1983-02-01 1984-08-13 Mitsubishi Electric Corp Detecting method for effective end position of metallic pipe
SE9203256L (en) * 1992-11-04 1994-01-10 Bofors Ab Magnetic zone tube
US5426363A (en) * 1993-04-26 1995-06-20 Kabushiki Kaisha Honda Denshi Giken Object detecting device
CN102077119A (en) * 2008-06-27 2011-05-25 觅宝电子有限公司 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 (en) * 1970-10-30 1973-11-08 Guenther Dipl.-Ing. 2209 Sushoern Weber Switching device triggered by one or more moving objects
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 (en) * 1976-08-19 1978-04-13
DE2722511A1 (en) * 1977-05-18 1978-11-30 Voll Walter METAL DETECTOR
DE2722498C3 (en) * 1977-05-18 1982-02-04 Walter Ing.(Grad.) 8728 Hassfurt Voll Device on a motor vehicle for displaying a minimum distance

Also Published As

Publication number Publication date
FR2505508A1 (en) 1982-11-12
GB2097933B (en) 1985-05-15
IT8248333A0 (en) 1982-05-05
CA1198165A (en) 1985-12-17
NO821485L (en) 1982-11-08
IT1147941B (en) 1986-11-26
DE3217033A1 (en) 1982-11-25
JPS57192887A (en) 1982-11-27
CH656231A5 (en) 1986-06-13
GB2097933A (en) 1982-11-10
SE426269B (en) 1982-12-20
SE8102827L (en) 1982-11-07
DE3217033C2 (en) 1991-01-03
BE893088A (en) 1982-08-30
NL8201811A (en) 1982-12-01

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Legal Events

Date Code Title Description
ST Notification of lapse