GB1498847A - Metal detector method and device - Google Patents

Metal detector method and device

Info

Publication number
GB1498847A
GB1498847A GB14734/75A GB1473475A GB1498847A GB 1498847 A GB1498847 A GB 1498847A GB 14734/75 A GB14734/75 A GB 14734/75A GB 1473475 A GB1473475 A GB 1473475A GB 1498847 A GB1498847 A GB 1498847A
Authority
GB
United Kingdom
Prior art keywords
detector
period
metal
april
periods
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.)
Expired
Application number
GB14734/75A
Other languages
English (en)
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Publication of GB1498847A publication Critical patent/GB1498847A/en
Expired 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
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Electrochemistry (AREA)
  • Electromagnetism (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biochemistry (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Control Of Conveyors (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
GB14734/75A 1974-04-11 1975-04-10 Metal detector method and device Expired GB1498847A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7404978A SE381107B (sv) 1974-04-11 1974-04-11 Anordning for begrensning av inverkan fran icke onskverda storningar i utrustningar for detektering av nervaron av specialla foremal, som ror sig med kend hastighet utefter en bestemd bana

Publications (1)

Publication Number Publication Date
GB1498847A true GB1498847A (en) 1978-01-25

Family

ID=20320817

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14734/75A Expired GB1498847A (en) 1974-04-11 1975-04-10 Metal detector method and device

Country Status (4)

Country Link
DE (1) DE2514135A1 (sv)
GB (1) GB1498847A (sv)
NO (1) NO751202L (sv)
SE (1) SE381107B (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166865A (en) * 1984-10-05 1986-05-14 Truetzschler & Co Device and method for detecting foreign bodies in bales of textile fibre

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4193028A (en) * 1978-05-05 1980-03-11 Honeywell Inc. Eddy current instrumentation circuitry for distinguishing flaw signals from spurious noise signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166865A (en) * 1984-10-05 1986-05-14 Truetzschler & Co Device and method for detecting foreign bodies in bales of textile fibre

Also Published As

Publication number Publication date
SE7404978L (sv) 1975-10-13
DE2514135A1 (de) 1975-10-23
SE381107B (sv) 1975-11-24
NO751202L (sv) 1975-10-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee