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
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.
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)
| 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 |
-
1968
- 1968-10-17 FR FR170279A patent/FR1591129A/fr not_active Expired
-
1969
- 1969-10-08 NO NO4011/69A patent/NO132883C/no unknown
- 1969-10-14 CS CS6847A patent/CS163745B2/cs unknown
- 1969-10-14 GB GB1264348D patent/GB1264348A/en not_active Expired
- 1969-10-15 NL NLAANVRAGE6915638,A patent/NL168338C/en not_active IP Right Cessation
- 1969-10-16 AT AT978169A patent/AT292842B/en not_active IP Right Cessation
- 1969-10-16 DE DE1952150A patent/DE1952150C3/en not_active Expired
- 1969-10-16 LU LU59652D patent/LU59652A1/xx unknown
- 1969-10-16 SE SE14196/69A patent/SE359380B/xx unknown
- 1969-10-16 DK DK551469A patent/DK132723C/en active
- 1969-10-16 CH CH1552569A patent/CH522225A/en not_active IP Right Cessation
- 1969-10-16 PL PL1969136351A patent/PL81185B1/pl unknown
- 1969-10-16 IL IL33201A patent/IL33201A/en unknown
- 1969-10-16 ES ES372595A patent/ES372595A1/en not_active Expired
- 1969-10-16 BE BE740369D patent/BE740369A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IL33201A (en) | 1973-05-31 |
| DK132723C (en) | 1976-06-28 |
| PL81185B1 (en) | 1975-08-30 |
| BE740369A (en) | 1970-04-01 |
| SE359380B (en) | 1973-08-27 |
| LU59652A1 (en) | 1970-01-12 |
| NL6915638A (en) | 1970-04-21 |
| DE1952150B2 (en) | 1973-10-25 |
| DE1952150A1 (en) | 1970-04-23 |
| FR1591129A (en) | 1970-04-27 |
| NO132883C (en) | 1976-01-21 |
| DK132723B (en) | 1976-01-26 |
| CS163745B2 (en) | 1975-11-07 |
| NO132883B (en) | 1975-10-13 |
| DE1952150C3 (en) | 1974-05-22 |
| AT292842B (en) | 1971-09-10 |
| NL168338C (en) | 1982-03-16 |
| IL33201A0 (en) | 1970-01-29 |
| NL168338B (en) | 1981-10-16 |
| GB1264348A (en) | 1972-02-23 |
| CH522225A (en) | 1972-06-15 |
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