JPS57127868A - Metal detector - Google Patents

Metal detector

Info

Publication number
JPS57127868A
JPS57127868A JP56013658A JP1365881A JPS57127868A JP S57127868 A JPS57127868 A JP S57127868A JP 56013658 A JP56013658 A JP 56013658A JP 1365881 A JP1365881 A JP 1365881A JP S57127868 A JPS57127868 A JP S57127868A
Authority
JP
Japan
Prior art keywords
coils
metal
magnetic field
square
bottom surfaces
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
JP56013658A
Other languages
Japanese (ja)
Inventor
Noboru Kaseda
Fumio Kotani
Yoshimasa Takahashi
Yasuharu Yamada
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.)
KAKU BUTSUSHITSU KANRI CENTER
Shimadzu Corp
Shimazu Seisakusho KK
Original Assignee
KAKU BUTSUSHITSU KANRI CENTER
Shimadzu Corp
Shimazu Seisakusho KK
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 KAKU BUTSUSHITSU KANRI CENTER, Shimadzu Corp, Shimazu Seisakusho KK filed Critical KAKU BUTSUSHITSU KANRI CENTER
Priority to JP56013658A priority Critical patent/JPS57127868A/en
Publication of JPS57127868A publication Critical patent/JPS57127868A/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
    • 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)

Abstract

PURPOSE:To detect the metal passing through accurately by arranging one square coil on each of top and bottom surfaces surrounding a path and two square coils on each of right and left surface so that current flows in the opposite direction on the boundary of the top and bottom surfaces and right and left surfaces and in the same direction on the boundary of the top and bottom coils in the right and left surfaces. CONSTITUTION:A total of six coils 1-6 are arranged on top and bottom surfaces and right and left surfaces (in total 4 surfaces) surrounding a path 10. Each one of coils 1 and 4 is disposed on the top and bottom surfaces and each two of coils 2, 3 and 5, 6 on the right and left surfaces. The coils 1-6 are all square coils wound on a square coil frame. Exciting current flows through the coils 1- 6 in the direction as illustrated so that the distribution of the magnetic field turns in various directions within the horizontal surface other than the central part, changing in a three-dimensional direction. Therefore, as metal passes, it is sequentially given a magnetic field from various directions thereby enabling the detection of the metal regardless of the attitude of a sheet-shaped metal. As the strength of the magnetic field enhances at the central part, the metal can be detected even if it is somewhat unfavorable in the shape and the attitude thereof.
JP56013658A 1981-01-31 1981-01-31 Metal detector Pending JPS57127868A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56013658A JPS57127868A (en) 1981-01-31 1981-01-31 Metal detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56013658A JPS57127868A (en) 1981-01-31 1981-01-31 Metal detector

Publications (1)

Publication Number Publication Date
JPS57127868A true JPS57127868A (en) 1982-08-09

Family

ID=11839297

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56013658A Pending JPS57127868A (en) 1981-01-31 1981-01-31 Metal detector

Country Status (1)

Country Link
JP (1) JPS57127868A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552888A1 (en) * 1983-09-30 1985-04-05 Electroniques Meca Et Electronic device for detecting objects, which are at least partly metallic, within a predetermined volume
CN106842336A (en) * 2017-02-09 2017-06-13 王积东 By formula detector and by formula detection method
EP3260889A1 (en) * 2016-06-22 2017-12-27 Mettler-Toledo Safeline Limited Metal detection apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49104662A (en) * 1973-01-11 1974-10-03

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49104662A (en) * 1973-01-11 1974-10-03

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552888A1 (en) * 1983-09-30 1985-04-05 Electroniques Meca Et Electronic device for detecting objects, which are at least partly metallic, within a predetermined volume
EP3260889A1 (en) * 2016-06-22 2017-12-27 Mettler-Toledo Safeline Limited Metal detection apparatus
US10605946B2 (en) 2016-06-22 2020-03-31 Mettler-Toledo Safeline Ltd. Metal detection apparatus
CN106842336A (en) * 2017-02-09 2017-06-13 王积东 By formula detector and by formula detection method

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