SE8703705D0 - magnetometer - Google Patents

magnetometer

Info

Publication number
SE8703705D0
SE8703705D0 SE19878703705A SE8703705A SE8703705D0 SE 8703705 D0 SE8703705 D0 SE 8703705D0 SE 19878703705 A SE19878703705 A SE 19878703705A SE 8703705 A SE8703705 A SE 8703705A SE 8703705 D0 SE8703705 D0 SE 8703705D0
Authority
SE
Sweden
Prior art keywords
frequency
magnetic field
indicator
output signal
unknown
Prior art date
Application number
SE19878703705A
Other languages
Swedish (sv)
Other versions
SE458397B (en
SE8703705L (en
Inventor
* Ingfors T
Original Assignee
Instrument Ab Scanditronix
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 Instrument Ab Scanditronix filed Critical Instrument Ab Scanditronix
Priority to SE8703705A priority Critical patent/SE458397B/en
Publication of SE8703705D0 publication Critical patent/SE8703705D0/en
Publication of SE458397B publication Critical patent/SE458397B/en
Publication of SE8703705L publication Critical patent/SE8703705L/xx

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/24—Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

A magnetic field-sensitive indicator (4) is fitted in the plane of measurement coils (2, 3) within the unknown magnetic field, and provides an electrical output signal corresp. to the unknown induction of the field for conversion (16) to a resonance frequency. A logic circuit (10), connected to the integrator (8), effects rough adjustment of the frequency generator (7) to a basic frequency which is close to but differs from the detected resonance frequency,and which is selected having regard for the measured induction value of the indicator. The logic circuit, after the frequency generator has been locked on to the resonance frequency, periodically monitors the output signal of the magnetic field-sensitive indicator (4). It releases the staged alteration by the integrator of the frequency generator RF frequency only if the indicator output signal shows that the unknown magnetic field has altered from that of the previous period.
SE8703705A 1987-09-24 1987-09-24 Magnetometer based on NMR effect SE458397B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8703705A SE458397B (en) 1987-09-24 1987-09-24 Magnetometer based on NMR effect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8703705A SE458397B (en) 1987-09-24 1987-09-24 Magnetometer based on NMR effect

Publications (3)

Publication Number Publication Date
SE8703705D0 true SE8703705D0 (en) 1987-09-24
SE458397B SE458397B (en) 1989-03-20
SE8703705L SE8703705L (en) 1989-03-20

Family

ID=20369669

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8703705A SE458397B (en) 1987-09-24 1987-09-24 Magnetometer based on NMR effect

Country Status (1)

Country Link
SE (1) SE458397B (en)

Also Published As

Publication number Publication date
SE458397B (en) 1989-03-20
SE8703705L (en) 1989-03-20

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