FR2698968B1 - Metal detector with offset electromagnetic transducers and non-uniformity correction circuit. - Google Patents

Metal detector with offset electromagnetic transducers and non-uniformity correction circuit.

Info

Publication number
FR2698968B1
FR2698968B1 FR9214650A FR9214650A FR2698968B1 FR 2698968 B1 FR2698968 B1 FR 2698968B1 FR 9214650 A FR9214650 A FR 9214650A FR 9214650 A FR9214650 A FR 9214650A FR 2698968 B1 FR2698968 B1 FR 2698968B1
Authority
FR
France
Prior art keywords
correction circuit
metal detector
uniformity correction
electromagnetic transducers
offset electromagnetic
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 - Lifetime
Application number
FR9214650A
Other languages
French (fr)
Other versions
FR2698968A1 (en
Inventor
Alessandro Manneschi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR9214650A priority Critical patent/FR2698968B1/en
Priority to DE4240921A priority patent/DE4240921C1/en
Publication of FR2698968A1 publication Critical patent/FR2698968A1/en
Application granted granted Critical
Publication of FR2698968B1 publication Critical patent/FR2698968B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
FR9214650A 1992-12-04 1992-12-04 Metal detector with offset electromagnetic transducers and non-uniformity correction circuit. Expired - Lifetime FR2698968B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9214650A FR2698968B1 (en) 1992-12-04 1992-12-04 Metal detector with offset electromagnetic transducers and non-uniformity correction circuit.
DE4240921A DE4240921C1 (en) 1992-12-04 1992-12-04 Metal detector for locating hidden weapons - compares signals using reception windings at different heights, to correct non-linearity

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9214650A FR2698968B1 (en) 1992-12-04 1992-12-04 Metal detector with offset electromagnetic transducers and non-uniformity correction circuit.
DE4240921A DE4240921C1 (en) 1992-12-04 1992-12-04 Metal detector for locating hidden weapons - compares signals using reception windings at different heights, to correct non-linearity

Publications (2)

Publication Number Publication Date
FR2698968A1 FR2698968A1 (en) 1994-06-10
FR2698968B1 true FR2698968B1 (en) 1995-01-20

Family

ID=25921016

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9214650A Expired - Lifetime FR2698968B1 (en) 1992-12-04 1992-12-04 Metal detector with offset electromagnetic transducers and non-uniformity correction circuit.

Country Status (2)

Country Link
DE (1) DE4240921C1 (en)
FR (1) FR2698968B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1265721B1 (en) * 1992-11-11 1996-12-02 Alessandro Manneschi METAL DETECTOR WITH MULTIPOLAR WINDINGS WITH THE ELIMINATION OF NEUTRALIZING EFFECTS
IT1271382B (en) * 1994-05-31 1997-05-27 Alessandro Manneschi METAL DETECTOR FOR COMBINED ACCESS CONTROL IN INTEGRATED FORM WITH TRANSPONDER DETECTOR
DE19606675A1 (en) * 1996-02-22 1997-08-28 Siemens Ag Method and device for detecting an object in an area to be monitored
US5726628A (en) * 1996-05-06 1998-03-10 Gd Electronics, Inc. Metal detector system
US7352180B2 (en) 2003-10-02 2008-04-01 Alessandro Manneschi Magnetic resonance detector for detecting non-authorized materials in footwear
EP1750148A1 (en) 2005-08-04 2007-02-07 Giovanni Manneschi Metal detector presenting high performance
ES2476025T3 (en) 2005-08-04 2014-07-11 Alessandro Manneschi Metal detector

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758849A (en) * 1972-03-31 1973-09-11 Sperry Rand Corp Metal detector system having identical balanced field coil system on opposite sides of a detection zone
GB2110825B (en) * 1981-11-06 1986-04-30 Outokumpu Oy Apparatus for detecting metal objects
US4634975A (en) * 1984-09-17 1987-01-06 Progressive Dynamics, Inc. Method and apparatus for producing electromagnetic surveillance fields
IT1214993B (en) * 1986-12-10 1990-01-31 Manneschi Alessandro METAL DETECTOR WITH MAGNETIC SCAN OF THE TRANSIT VOLUME.
IT1216946B (en) * 1987-02-03 1990-03-14 Manneschi Giovanni METAL DETECTOR WITH CORRECTION OF DISUNIFORMITIES
FI84209C (en) * 1988-11-01 1991-10-25 Outokumpu Oy METALLDETEKTOR.

Also Published As

Publication number Publication date
DE4240921C1 (en) 1994-05-11
FR2698968A1 (en) 1994-06-10

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