JPS57206855A - Magnetism detector - Google Patents

Magnetism detector

Info

Publication number
JPS57206855A
JPS57206855A JP56090913A JP9091381A JPS57206855A JP S57206855 A JPS57206855 A JP S57206855A JP 56090913 A JP56090913 A JP 56090913A JP 9091381 A JP9091381 A JP 9091381A JP S57206855 A JPS57206855 A JP S57206855A
Authority
JP
Japan
Prior art keywords
outputs
sheet
elements
biased
magnetic field
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
JP56090913A
Other languages
Japanese (ja)
Inventor
Kunihiko Matsui
Sukeyoshi Tanaka
Tetsuji Kobayashi
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 JP56090913A priority Critical patent/JPS57206855A/en
Publication of JPS57206855A publication Critical patent/JPS57206855A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE:To detect ferromagnetic component in sheets or the like without making contact with the sheet, through determining the mean value of outputs from a plurality of magneto-electric conversion elements. CONSTITUTION:Pairs of magnetic reluctance elements (31,32), (33,34)...(3m,3n) are arranged in the direction of scanning of a sheet or the like. These magnetic reluctance elements are biased by a uniform magnetic field produced by a permanents are biased by a uniform magnetic field produced by a permanent magnet or an electromagnet. The outputs from these elements are delivered to a mean value computation circuit 37 which produces a signal corresponding to the mean level of these outputs. According to this arrangement, it is possible to inspect at a high speed the sheet or the like member containing ferromagnetic component to be inspected without requiring direct contact with the latter.
JP56090913A 1981-06-15 1981-06-15 Magnetism detector Pending JPS57206855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56090913A JPS57206855A (en) 1981-06-15 1981-06-15 Magnetism detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56090913A JPS57206855A (en) 1981-06-15 1981-06-15 Magnetism detector

Publications (1)

Publication Number Publication Date
JPS57206855A true JPS57206855A (en) 1982-12-18

Family

ID=14011645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56090913A Pending JPS57206855A (en) 1981-06-15 1981-06-15 Magnetism detector

Country Status (1)

Country Link
JP (1) JPS57206855A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01265186A (en) * 1988-04-16 1989-10-23 Ookurashiyou Insatsu Kyokucho Inspecting and selecting device for magnetic foreign matter contained in sheet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01265186A (en) * 1988-04-16 1989-10-23 Ookurashiyou Insatsu Kyokucho Inspecting and selecting device for magnetic foreign matter contained in sheet

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