ES372595A1 - Procedure to compensate the parasite magnetic fields. (Machine-translation by Google Translate, not legally binding) - Google Patents

Procedure to compensate the parasite magnetic fields. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES372595A1
ES372595A1 ES372595A ES372595A ES372595A1 ES 372595 A1 ES372595 A1 ES 372595A1 ES 372595 A ES372595 A ES 372595A ES 372595 A ES372595 A ES 372595A ES 372595 A1 ES372595 A1 ES 372595A1
Authority
ES
Spain
Prior art keywords
voltage
proportional
output
point
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.)
Expired
Application number
ES372595A
Other languages
Spanish (es)
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of ES372595A1 publication Critical patent/ES372595A1/en
Expired legal-status Critical Current

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
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/025—Compensating stray fields

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Feeding Of Articles To Conveyors (AREA)
  • Registering Or Overturning Sheets (AREA)

Abstract

A magnetometer for use on board an aircraft having means for compensating for parasitic magnetic fields comprises means delivering a voltage e 1 proportional to the total magnetic field at a point 1 distance x+ #x from the barycentre 4 of the perturbing fields, means delivering a voltage e 2 proportional to the difference between the total magnetic field at point 1 and the total magnetic field at a point 2, distance x from the barycentre, an adjustable-gain amplifier 16 for multiplying e 2 by a factor depending on x to generate a third voltage e 3 proportional to the intensity of the perturbing fields at point 1 with the same proportionalitv factor as e 1 , and means 18 for subtracting e 3 from e 1 to generate a voltage e 4 proportional to the magnetic field being measured. In Fig. 5, the output of a magnetometer 3 of the nuclear magnetic resonance spin oscillator type is amplified at 7 and fed to a frequency meter 5 which produces the voltage e 1 . The output of amplifier 7 is also fed to a nuclear magnetic resonance filter 8 which produces a phase shift proportional to the difference in field strength at points 1 and 2. The output of filter 8 is amplified at 14 and compared in phase meter 11 with the output from amplifier 7 to produce the voltage e 2 . Alternatively, a second spin oscillator (3a), Fig. 8 (not shown), may be used instead of nuclear filter 8, a differential frequency meter (31) being used instead of phase meter 11. Coils (28), Fig. 6 (not shown), may be energized to make the barycentre of perturbing fields due to eddy currents coincide with that due to ferromagnetic masses. Preferably, points 1 and 2 lie on the fore-and-aft axis of the aircraft. Theoretical details are given.
ES372595A 1968-10-17 1969-10-16 Procedure to compensate the parasite magnetic fields. (Machine-translation by Google Translate, not legally binding) Expired ES372595A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR170279 1968-10-17

Publications (1)

Publication Number Publication Date
ES372595A1 true ES372595A1 (en) 1975-12-16

Family

ID=8655769

Family Applications (1)

Application Number Title Priority Date Filing Date
ES372595A Expired ES372595A1 (en) 1968-10-17 1969-10-16 Procedure to compensate the parasite magnetic fields. (Machine-translation by Google Translate, not legally binding)

Country Status (15)

Country Link
AT (1) AT292842B (en)
BE (1) BE740369A (en)
CH (1) CH522225A (en)
CS (1) CS163745B2 (en)
DE (1) DE1952150C3 (en)
DK (1) DK132723C (en)
ES (1) ES372595A1 (en)
FR (1) FR1591129A (en)
GB (1) GB1264348A (en)
IL (1) IL33201A (en)
LU (1) LU59652A1 (en)
NL (1) NL168338C (en)
NO (1) NO132883C (en)
PL (1) PL81185B1 (en)
SE (1) SE359380B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2132588B1 (en) * 1971-04-09 1974-03-08 Commissariat Energie Atomique
FR2507770A1 (en) * 1981-06-11 1982-12-17 Crouzet Sa Magnetic field perturbation compensating system for aircraft - analyses development of modulus of earth field perturbed in space to transform ellipsoidal theoretical sphere
DE3132933C2 (en) * 1981-08-20 1984-09-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Procedure for determining the winding currents in magnetic intrinsic protection (MES) systems
DE102009043358A1 (en) * 2008-04-11 2011-04-07 Cestronics Gmbh Lock cylinder with magnetically coupled closing element
FR3026193B1 (en) 2014-09-19 2016-12-23 Commissariat Energie Atomique MAGNETOMETER WITHOUT ASSEMBLY AND COMPENSATION OF LOW FIELD RESONANCE SLOPE FLUCTUATIONS, MAGNETOMETER NETWORK AND MEASURING METHOD

Also Published As

Publication number Publication date
NL168338B (en) 1981-10-16
NO132883C (en) 1976-01-21
BE740369A (en) 1970-04-01
CH522225A (en) 1972-06-15
GB1264348A (en) 1972-02-23
AT292842B (en) 1971-09-10
IL33201A0 (en) 1970-01-29
NL6915638A (en) 1970-04-21
CS163745B2 (en) 1975-11-07
SE359380B (en) 1973-08-27
DE1952150C3 (en) 1974-05-22
DK132723C (en) 1976-06-28
IL33201A (en) 1973-05-31
NO132883B (en) 1975-10-13
NL168338C (en) 1982-03-16
DK132723B (en) 1976-01-26
LU59652A1 (en) 1970-01-12
PL81185B1 (en) 1975-08-30
DE1952150B2 (en) 1973-10-25
FR1591129A (en) 1970-04-27
DE1952150A1 (en) 1970-04-23

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