IT1236874B - Rivelatore di metalli che utilizza un campo magnetico indotto da corrente parassita - Google Patents

Rivelatore di metalli che utilizza un campo magnetico indotto da corrente parassita

Info

Publication number
IT1236874B
IT1236874B IT02217789A IT2217789A IT1236874B IT 1236874 B IT1236874 B IT 1236874B IT 02217789 A IT02217789 A IT 02217789A IT 2217789 A IT2217789 A IT 2217789A IT 1236874 B IT1236874 B IT 1236874B
Authority
IT
Italy
Prior art keywords
parasit
current
magnetic field
metal detector
field induced
Prior art date
Application number
IT02217789A
Other languages
English (en)
Other versions
IT8922177A0 (it
IT8922177A1 (it
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 filed Critical
Publication of IT8922177A0 publication Critical patent/IT8922177A0/it
Publication of IT8922177A1 publication Critical patent/IT8922177A1/it
Application granted granted Critical
Publication of IT1236874B publication Critical patent/IT1236874B/it

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

  • 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)
  • Measuring Magnetic Variables (AREA)
IT02217789A 1988-11-01 1989-10-27 Rivelatore di metalli che utilizza un campo magnetico indotto da corrente parassita IT1236874B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI885027A FI84209C (fi) 1988-11-01 1988-11-01 Metalldetektor.

Publications (3)

Publication Number Publication Date
IT8922177A0 IT8922177A0 (it) 1989-10-27
IT8922177A1 IT8922177A1 (it) 1991-04-27
IT1236874B true IT1236874B (it) 1993-04-26

Family

ID=8527293

Family Applications (1)

Application Number Title Priority Date Filing Date
IT02217789A IT1236874B (it) 1988-11-01 1989-10-27 Rivelatore di metalli che utilizza un campo magnetico indotto da corrente parassita

Country Status (5)

Country Link
US (1) US5121105A (it)
DE (1) DE3936278C2 (it)
FI (1) FI84209C (it)
GB (1) GB2224849B (it)
IT (1) IT1236874B (it)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130697A (en) * 1990-10-30 1992-07-14 Sensormatic Electronics Corporation Method and apparatus for shaping a magnetic field
US5493517A (en) * 1991-06-03 1996-02-20 Hughes Missile Systems Company Cargo container mapping system
US5341126A (en) * 1991-12-26 1994-08-23 Boykin Roger O Selective exit control system
FR2688597A1 (fr) * 1992-03-11 1993-09-17 Bargues Didier Dispositif d'antennes d'emission et de reception h.f. capable de detecter un circuit bouchon (l.c.) suivant un parcours horizontal.
IT1265721B1 (it) * 1992-11-11 1996-12-02 Alessandro Manneschi Metal detector ad avvolgimenti multipolari con l'eliminazione di effetti neutralizzanti
IT1260208B (it) * 1992-11-19 1996-04-02 Giovanni Manneschi Metal detector perfezionato
DE4240921C1 (de) * 1992-12-04 1994-05-11 Alessandro Manneschi Metalldetektor
SE9500175L (sv) * 1995-01-19 1996-07-20 Siemens Elema Ab Förfarande och anordning för att identifiera minst ett narkosmedel i en narkosutrustning
CN1185865A (zh) * 1995-05-30 1998-06-24 传感电子公司 用于改进询问场分布的eas系统天线结构
US5602556A (en) * 1995-06-07 1997-02-11 Check Point Systems, Inc. Transmit and receive loop antenna
US5790685A (en) * 1995-06-29 1998-08-04 Tracor, Inc. Apparatus and method for detecting and imaging metal
US5726628A (en) * 1996-05-06 1998-03-10 Gd Electronics, Inc. Metal detector system
US5914692A (en) * 1997-01-14 1999-06-22 Checkpoint Systems, Inc. Multiple loop antenna with crossover element having a pair of spaced, parallel conductors for electrically connecting the multiple loops
KR100228251B1 (ko) * 1997-12-20 1999-11-01 박병용 권총류 탐지시스템
DE29813997U1 (de) 1998-08-05 1998-10-08 Maier, Hans-Jürgen, 72072 Tübingen Vorrichtung zur Erkennung von metallischen Gegenständen
ATE329279T1 (de) * 1998-12-18 2006-06-15 Ebinger Klaus Ing Fa Anordnung zum erzeugen und/oder empfangen eines magnetfeldes
US6362739B1 (en) 1999-09-22 2002-03-26 Garry L. Burton Passive security device for detecting ferromagnetic objects
US6469624B1 (en) * 2000-01-03 2002-10-22 3-J Tech., Ltd. Non-obtrusive weapon detection system
AU2002365033A1 (en) * 2001-10-25 2003-06-17 The Johns Hopkins University Wide area metal detection (wamd) system and method for security screening crowds
US6900727B2 (en) * 2002-07-16 2005-05-31 Bert Taeho Lee Weapon detector system
US7352180B2 (en) * 2003-10-02 2008-04-01 Alessandro Manneschi Magnetic resonance detector for detecting non-authorized materials in footwear
FR2889338B1 (fr) * 2005-07-26 2007-10-05 Alessandro Manneschi Detecteur d'objets non autorises dans une zone a acces protege
ES2476025T3 (es) 2005-08-04 2014-07-11 Alessandro Manneschi Detector de metales
FR2901888B1 (fr) * 2006-05-30 2008-08-22 Alessandro Manneschi Portique detecteur de metaux comportant des moyens indicateurs perfectionnes
GB2441346B (en) 2006-09-01 2011-04-13 Qinetiq Ltd Metal object detecting apparatus
WO2008087385A2 (en) 2007-01-15 2008-07-24 Rapiscan Systems, Inc. Detector systems
US8995619B2 (en) 2010-03-14 2015-03-31 Rapiscan Systems, Inc. Personnel screening system
US7796733B2 (en) * 2007-02-01 2010-09-14 Rapiscan Systems, Inc. Personnel security screening system with enhanced privacy
US8576982B2 (en) 2008-02-01 2013-11-05 Rapiscan Systems, Inc. Personnel screening system
US8638904B2 (en) 2010-03-14 2014-01-28 Rapiscan Systems, Inc. Personnel screening system
JP5503535B2 (ja) 2007-06-21 2014-05-28 ラピスカン システムズ、インコーポレイテッド 管理された身体検査を改良するシステム及び方法
JP2013522622A (ja) 2010-03-14 2013-06-13 ラピスカン システムズ、インコーポレイテッド ビーム形成装置
US20110234214A1 (en) * 2010-03-24 2011-09-29 Minelab Electronics Pty Limited Metal detector sensor head
US11280898B2 (en) 2014-03-07 2022-03-22 Rapiscan Systems, Inc. Radar-based baggage and parcel inspection systems
AU2015227069B2 (en) 2014-03-07 2020-05-14 Rapiscan Systems, Inc. Ultra wide band detectors
KR20170109533A (ko) 2014-11-25 2017-09-29 라피스캔 시스템스, 인코포레이티드 지능형 보안관리시스템
US9715030B1 (en) 2016-03-07 2017-07-25 Matias SaavedraSilvia Object detection and removal apparatus
US10720300B2 (en) 2016-09-30 2020-07-21 American Science And Engineering, Inc. X-ray source for 2D scanning beam imaging
EP3385758A1 (de) * 2017-04-05 2018-10-10 HILTI Aktiengesellschaft Vorrichtung und verfahren zum detektieren von elektrisch leitenden messobjekten in einem untergrund

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB729706A (en) * 1952-08-20 1955-05-11 Telefunken Gmbh Improvements in or relating to electro-magnetic metal detecting instruments
GB858548A (en) * 1958-02-14 1961-01-11 Square D Co Metal detectors
US3665298A (en) * 1970-01-05 1972-05-23 Erico Prod Inc Metal impurity detector for tubular conveyor system
GB1436900A (en) * 1972-05-26 1976-05-26 Heytow S Metal detector
US4012690A (en) * 1974-01-22 1977-03-15 Solomon Heytow Device for selectively detecting different kinds and sizes of metals
GB2110825B (en) * 1981-11-06 1986-04-30 Outokumpu Oy Apparatus for detecting metal objects
US4489313A (en) * 1982-09-01 1984-12-18 Sensormatic Electronics Corporation Signal direction determining system and directional loop antenna array therefor
US4866424A (en) * 1988-01-11 1989-09-12 Eg&G Astrophysics Research Corporation Metal detector coil

Also Published As

Publication number Publication date
DE3936278A1 (de) 1990-05-03
FI84209C (fi) 1991-10-25
IT8922177A0 (it) 1989-10-27
GB8924276D0 (en) 1989-12-13
GB2224849B (en) 1993-03-17
DE3936278C2 (de) 1998-12-03
FI885027A (fi) 1990-05-02
FI885027A0 (fi) 1988-11-01
US5121105A (en) 1992-06-09
IT8922177A1 (it) 1991-04-27
FI84209B (fi) 1991-07-15
GB2224849A (en) 1990-05-16

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19950929