WO1999026257A1 - Marqueur magnetique - Google Patents

Marqueur magnetique Download PDF

Info

Publication number
WO1999026257A1
WO1999026257A1 PCT/JP1998/005069 JP9805069W WO9926257A1 WO 1999026257 A1 WO1999026257 A1 WO 1999026257A1 JP 9805069 W JP9805069 W JP 9805069W WO 9926257 A1 WO9926257 A1 WO 9926257A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
magnetic material
marker
soft magnetic
soft
Prior art date
Application number
PCT/JP1998/005069
Other languages
English (en)
Japanese (ja)
Inventor
Shinji Furukawa
Shuji Ueno
Kenji Amiya
Toshiyuki Hirano
Original Assignee
Unitika Ltd.
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 Unitika Ltd. filed Critical Unitika Ltd.
Priority to EP98953009A priority Critical patent/EP0961301B1/fr
Priority to DE69837528T priority patent/DE69837528T2/de
Publication of WO1999026257A1 publication Critical patent/WO1999026257A1/fr

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2434—Tag housing and attachment details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0304—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions adapted for large Barkhausen jumps or domain wall rotations, e.g. WIEGAND or MATTEUCCI effect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/153—Amorphous metallic alloys, e.g. glassy metals
    • H01F1/15391—Elongated structures, e.g. wires

Definitions

  • the present inventors have found that the above object can be achieved by using a soft magnetic material having a magnetic property that is carefully restricted as a soft magnetic material constituting a magnetic marker, and have reached the present invention.
  • FIG. 3 is a perspective view showing three types of spatial positions of the magnetic sensor. BEST MODE FOR CARRYING OUT THE INVENTION
  • the sensitivity does not change much even if the value becomes smaller.
  • a soft magnetic material having a magnetization reversal magnetic field exceeding 0.20e is not preferable for the present invention because the sensitivity is lowered particularly in a system of a high magnetic permeability type.
  • the physical meaning of this magnetic field strength corresponds to the coercive force of a soft magnetic material when the magnetic marker is excited with a sufficiently large magnetic field.
  • the coercive force generally tends to depend on the amplitude strength of the excitation magnetic field, but the above value roughly corresponds to the coercive force when excited at 73 Hz and an amplitude strength of 1 Oe.
  • the dependence of coercive force on the excitation magnetic field amplitude is small, and it is preferable to obtain a high level of detection sensitivity and a magnetic marker in each system.
  • the difference in coercive force when excited is within 50% of the coercive force when excited at 50e.
  • the coercive force is excited It is generally known that the effect is affected by the frequency.For example, the difference between the coercive force when excited at 73 Hz and that at 1 kHz is the difference in the coercive force when excited at 1 kHz. It is preferable if it is within 50%.
  • the change in the reversal magnetic field means that the magnetic field strength at which the soft magnetic material of the magnetic marker reverses its magnetization changes every cycle when an alternating magnetic field of the same amplitude is repeatedly applied to the same magnetic marker.
  • Means The value is evaluated as follows in the present invention. Measure the strength of the switching field for 20 consecutive cycles and calculate the average of the switching field strength in positive or negative cycles. Next, the absolute value of the difference between the average magnetization reversal magnetic field strength and the actual magnetization reversal magnetic field strength in each of the positive and negative cycles is calculated, the calculated results are added, and the result is divided by 40. Is defined as the change in the switching field. If the change in the switching field exceeds 0.10e, it is not preferable because the detection sensitivity is extremely reduced in a so-called large Barkhausen type system represented by Japanese Patent Publication No. 3-27958.
  • the magnetic marker of the present invention is generally used in the form of a label, tag, or other form having an adhesive layer.
  • the present invention is not particularly limited to these forms.
  • a label-shaped magnetic marker will be described.
  • the soft magnetic material that emits a signal in the monitored area is sandwiched between two sheets of paper or plastic film.
  • An adhesive layer is applied to the inner surface of these papers or films to hold the soft magnetic material.
  • the hard magnetic material is arranged so as to be in close contact with the soft magnetic material, and is sandwiched between these two sheets of paper or plastic film.
  • Examples 4 to 5 and Comparative Example 3 Using a single roll device, a metal ribbon having the composition shown in Table 1 was produced.
  • the production conditions for the single roll method at this time were as follows. Approximately 20 Og of the mother alloy was inserted into the quartz nozzle, and high-frequency melting was performed in an argon atmosphere. The argon gas pressure was increased to about 2 kg / cm 2 , and molten metal was ejected from a nozzle hole having a diameter of about 300 / m. The molten metal was ejected to the outer peripheral surface of a copper roll having a diameter of 20 O mm rotating at about 120 O rpm, rapidly cooled and solidified, and wound around a reel by a winding mechanism.
  • the metal ribbon thus obtained was subjected to a heat treatment at 320 ° C for 10 minutes while applying a twist of 5 to 10 times per lm, and was subjected to magnetic treatment in the same manner as in Example 1.
  • the samples of Examples 4 to 5 were processed into markers.
  • the ribbon obtained by the single-roll apparatus was used as a magnetic marker without heat treatment and used as a sample.
  • a pickup coil with a compensation coil with a diameter of 3 O mm, a length of 20 mm and a length of 100 turns is placed in a solenoid coil for excitation with a diameter of 60 mm and a length of 198 turns, and a length of 189 turns. Examples 1 to 5 and Comparative Example 1 so that the backup coil is located at the center of the sample.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Burglar Alarm Systems (AREA)
  • Thin Magnetic Films (AREA)

Abstract

Ce petit marqueur magnétique, très sensible, est utilisable à la fois dans les systèmes dénommés généralement, système de Barkhausen et système à grande perméabilité. La longueur de ce marqueur magnétique comprenant une matériau magnétique mou n'excède pas 70 mm. Quand un champ magnétique alternatif d'une intensité inférieure à 0,20 e est appliqué à ce matériau magnétique mou, celui-ci provoque une inversion raide du champ magnétique avec un changement de flux magnétique supérieur à 8,0 x 10-9 Wb. La variation de l'intensité du champ magnétique, lorsque le matériau magnétique mou provoque une inversion de magnétisation, est, de préférence, inférieure ou égale à 0,10 e.
PCT/JP1998/005069 1997-11-17 1998-11-11 Marqueur magnetique WO1999026257A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP98953009A EP0961301B1 (fr) 1997-11-17 1998-11-11 Marqueur magnetique
DE69837528T DE69837528T2 (de) 1997-11-17 1998-11-11 Magnetisches etikett

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9/314983 1997-11-17
JP31498397 1997-11-17

Publications (1)

Publication Number Publication Date
WO1999026257A1 true WO1999026257A1 (fr) 1999-05-27

Family

ID=18060017

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1998/005069 WO1999026257A1 (fr) 1997-11-17 1998-11-11 Marqueur magnetique

Country Status (4)

Country Link
EP (1) EP0961301B1 (fr)
DE (1) DE69837528T2 (fr)
ES (1) ES2284215T3 (fr)
WO (1) WO1999026257A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014171044A (ja) * 2013-03-01 2014-09-18 Yokohama National Univ 電気パルス発生装置、及び電気パルス発生装方法
WO2017187879A1 (fr) * 2016-04-28 2017-11-02 愛知製鋼株式会社 Marqueur magnétique et système d'aide à la conduite

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2847065B1 (fr) * 2002-11-13 2005-04-15 C P C Packaging Etiquette pour la protection d'un article contre le vol
FR2847064B1 (fr) * 2002-11-13 2005-02-11 C P C Packaging Etiquette pour la protection d'un article contre le vol
AT511332B1 (de) * 2011-08-11 2012-11-15 Suess Dieter Dr Methode und vorrichtung zur diskriminierenden detektion von behältern für die zubereitung von nahrungsmitteln in extraktionsmaschinen mittels magnetisierbarer materialien
GB2585034A (en) * 2019-06-25 2020-12-30 Endomagnetics Ltd Hyperthermia implants and a method and system for heating the implant
US11166782B1 (en) 2020-07-19 2021-11-09 Sirius Medical Systems B.V. Implantable marker and a method of implanting markers

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05256953A (ja) * 1991-12-04 1993-10-08 Knogo Corp マルチパルス応答器及び検知システムならびにそれらを製造及び使用する方法
JPH09134817A (ja) * 1995-11-08 1997-05-20 Unitika Ltd 磁気マーカ

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660025A (en) * 1984-11-26 1987-04-21 Sensormatic Electronics Corporation Article surveillance magnetic marker having an hysteresis loop with large Barkhausen discontinuities
DE3545647A1 (de) * 1985-12-21 1987-06-25 Vacuumschmelze Gmbh Deaktivierbares sicherungsetikett fuer diebstahlsicherungssysteme
US5015993A (en) * 1989-06-29 1991-05-14 Pitney Bowes Inc. Ferromagnetic alloys with high nickel content and high permeability

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05256953A (ja) * 1991-12-04 1993-10-08 Knogo Corp マルチパルス応答器及び検知システムならびにそれらを製造及び使用する方法
JPH09134817A (ja) * 1995-11-08 1997-05-20 Unitika Ltd 磁気マーカ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0961301A4 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014171044A (ja) * 2013-03-01 2014-09-18 Yokohama National Univ 電気パルス発生装置、及び電気パルス発生装方法
WO2017187879A1 (fr) * 2016-04-28 2017-11-02 愛知製鋼株式会社 Marqueur magnétique et système d'aide à la conduite
JPWO2017187879A1 (ja) * 2016-04-28 2019-02-28 愛知製鋼株式会社 磁気マーカ及び運転支援システム
US11921516B2 (en) 2016-04-28 2024-03-05 Aichi Steel Corporation Magnetic marker and driving assistance system

Also Published As

Publication number Publication date
EP0961301A1 (fr) 1999-12-01
DE69837528T2 (de) 2007-08-09
DE69837528D1 (de) 2007-05-24
ES2284215T3 (es) 2007-11-01
EP0961301B1 (fr) 2007-04-11
EP0961301A4 (fr) 2001-07-18

Similar Documents

Publication Publication Date Title
JP3152862B2 (ja) 電子物品監視装置用磁気標識及び製造方法
JP2666813B2 (ja) 非晶質盗難防止用マーカー
JP4030586B2 (ja) 低法磁力偏倚素子を有する磁気機械的電子的物品監視マーカー
JP5231209B2 (ja) コード化電子商品監視システム用マーカ
KR100204747B1 (ko) 원격 감지용 자기 태그 및 객체 인식 시스템
US5650023A (en) Metallic glass alloys for mechanically resonant marker surveillance systems
JP2008545175A5 (fr)
JP4778551B2 (ja) コード化電子商品識別システム用マーカ
JP3372117B2 (ja) 磁気マーカー及びその製造方法
CA2281797C (fr) Etiquette de surveillance magnetomecanique d'articles a polarisation abrupte
JP3955623B2 (ja) 機械的に共振するマーカーによる監視装置用の金属ガラス合金
US20100259391A1 (en) Electronic Article Surveillance Marker
US6093261A (en) Metallic glass alloys for mechanically resonant marker surveillance systems
WO1999026257A1 (fr) Marqueur magnetique
TW201324370A (zh) 磁力感測器元件及其在電子物件監控與偵測系統中的應用
US6489891B1 (en) Apparatus for electronic article surveillance tag pollution reduction
US5495231A (en) Metallic glass alloys for mechanically resonant marker surveillance systems
KR20010030740A (ko) 기계적 공진마커 감시시스템을 위한 금속유리합금
JP2008510225A (ja) 電子式物品監視に使用される磁気機械式マーカーの非活性化
US6023226A (en) EAS marker with flux concentrators having magnetic anisotropy oriented transversely to length of active element
KR20000022311A (ko) 기계적 공진마커 감시시스템을 위한 금속유리합금

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

WWE Wipo information: entry into national phase

Ref document number: 1998953009

Country of ref document: EP

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWP Wipo information: published in national office

Ref document number: 1998953009

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: CA

WWG Wipo information: grant in national office

Ref document number: 1998953009

Country of ref document: EP