JPS57199972A - Detector for metallic piece present in paper or the like - Google Patents

Detector for metallic piece present in paper or the like

Info

Publication number
JPS57199972A
JPS57199972A JP56084314A JP8431481A JPS57199972A JP S57199972 A JPS57199972 A JP S57199972A JP 56084314 A JP56084314 A JP 56084314A JP 8431481 A JP8431481 A JP 8431481A JP S57199972 A JPS57199972 A JP S57199972A
Authority
JP
Japan
Prior art keywords
metallic piece
paper
magnetic
detector
present
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.)
Pending
Application number
JP56084314A
Other languages
Japanese (ja)
Inventor
Takeshi Ishida
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56084314A priority Critical patent/JPS57199972A/en
Priority to US06/336,684 priority patent/US4518919A/en
Priority to AT82300197T priority patent/ATE26353T1/en
Priority to EP82300197A priority patent/EP0057520B1/en
Priority to DE8282300197T priority patent/DE3275957D1/en
Publication of JPS57199972A publication Critical patent/JPS57199972A/en
Pending 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
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/04—Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Electromagnetism (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

PURPOSE:To detect a metallic piece effectively used to discriminate between the truth and fasehood of paper, etc., by detecting variation in resistance value of a magnetic resistance element with a magnetic field which varies when the metallic piece present in the paper, etc., passes in magnetic flux. CONSTITUTION:When paper currency P wherein a metallic piece 2 is present is carried and passed between detection heads 41 and 42, the distribution of a magnetic field 7 by permanent magnets 51 and 52 varies and the resistance values of magnetic resistance elements 61 and 62 also vary. Consequently, even when the metallic piece 2 is a magnetic material, its presence is detected securely.
JP56084314A 1981-01-16 1981-06-03 Detector for metallic piece present in paper or the like Pending JPS57199972A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP56084314A JPS57199972A (en) 1981-06-03 1981-06-03 Detector for metallic piece present in paper or the like
US06/336,684 US4518919A (en) 1981-01-16 1982-01-04 Detecting device for detecting a magnetic strip embedded in a sheet
AT82300197T ATE26353T1 (en) 1981-01-16 1982-01-14 DEVICE FOR DETECTING A MAGNETIC STRIP INSERTED IN PAPER.
EP82300197A EP0057520B1 (en) 1981-01-16 1982-01-14 A device for detecting a magnetic strip embedded in paper
DE8282300197T DE3275957D1 (en) 1981-01-16 1982-01-14 A device for detecting a magnetic strip embedded in paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56084314A JPS57199972A (en) 1981-06-03 1981-06-03 Detector for metallic piece present in paper or the like

Publications (1)

Publication Number Publication Date
JPS57199972A true JPS57199972A (en) 1982-12-08

Family

ID=13827039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56084314A Pending JPS57199972A (en) 1981-01-16 1981-06-03 Detector for metallic piece present in paper or the like

Country Status (1)

Country Link
JP (1) JPS57199972A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017036984A (en) * 2015-08-10 2017-02-16 セイコーＮｐｃ株式会社 Magnetic sensor device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017036984A (en) * 2015-08-10 2017-02-16 セイコーＮｐｃ株式会社 Magnetic sensor device

Similar Documents

Publication Publication Date Title
EP0057520B1 (en) A device for detecting a magnetic strip embedded in paper
US4617458A (en) Counterfeit detection circuit
GB1249274A (en) Magnetically determining mechanical properties of moving ferro-magnetic materials
JPS57199972A (en) Detector for metallic piece present in paper or the like
JPS5729966A (en) Magnetic field measuring device
JPS5327425A (en) Detection of copy paper size
JPS57119277A (en) Detecting device for metal piece placed in paper
JPS5633541A (en) Detecting device for flaw of magnetic material
JPS5224593A (en) Material detecting device
GB1270821A (en) Ferromagnetic metal detector
JPS5769368A (en) Tire discriminator
JPS646763A (en) Rotational speed detector
JPS56137411A (en) Malfunction detecting method in position control system
JPS52128189A (en) Eddy current flaw detector
JPS54161394A (en) Bank note discriminator
JPS641970A (en) Current detector
JPS5594156A (en) Magnetic flaw detector for rope
JPS524135A (en) Booklet detection equipment
JPS5472096A (en) Detecting apparatus of steel wire welded parts
FR2344346A1 (en) Detection system for mailbags - uses thin magnetic strip or wire markings for triggering operation or selective processing and uses AC coil sensors (NL 20.9.77)
JPS5637945A (en) Method of detecting abnormality of paper feed
JPS5224592A (en) Material detecting device
JPS5452567A (en) Position detector
JPS552139A (en) Detection of opening and closing of manhole cover
JPS5471693A (en) Vessel identifying method