FR2512965B1 - Dispositif d'equilibrage fin pour appareil de mesure de gradient a derivee seconde, possedant trois enroulements, pour la mesure de signaux magnetiques faibles - Google Patents

Dispositif d'equilibrage fin pour appareil de mesure de gradient a derivee seconde, possedant trois enroulements, pour la mesure de signaux magnetiques faibles

Info

Publication number
FR2512965B1
FR2512965B1 FR8213314A FR8213314A FR2512965B1 FR 2512965 B1 FR2512965 B1 FR 2512965B1 FR 8213314 A FR8213314 A FR 8213314A FR 8213314 A FR8213314 A FR 8213314A FR 2512965 B1 FR2512965 B1 FR 2512965B1
Authority
FR
France
Prior art keywords
windings
balancing device
low magnetic
magnetic signals
measuring apparatus
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
FR8213314A
Other languages
English (en)
Other versions
FR2512965A1 (fr
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.)
Consiglio Nazionale delle Richerche CNR
Original Assignee
Consiglio Nazionale delle Richerche CNR
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 Consiglio Nazionale delle Richerche CNR filed Critical Consiglio Nazionale delle Richerche CNR
Publication of FR2512965A1 publication Critical patent/FR2512965A1/fr
Application granted granted Critical
Publication of FR2512965B1 publication Critical patent/FR2512965B1/fr
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
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/022—Measuring gradient
    • 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
    • G01R33/035—Measuring direction or magnitude of magnetic fields or magnetic flux using superconductive devices
    • G01R33/0354—SQUIDS
    • G01R33/0358—SQUIDS coupling the flux to the SQUID
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/842—Measuring and testing
    • Y10S505/843—Electrical
    • Y10S505/845—Magnetometer
    • Y10S505/846—Magnetometer using superconductive quantum interference device, i.e. squid

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
FR8213314A 1981-07-31 1982-07-30 Dispositif d'equilibrage fin pour appareil de mesure de gradient a derivee seconde, possedant trois enroulements, pour la mesure de signaux magnetiques faibles Expired FR2512965B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT49023/81A IT1171429B (it) 1981-07-31 1981-07-31 Perfezionamento nei dispositivo per misure biomagnetiche utilizzanti gradiometri a seconda derivata

Publications (2)

Publication Number Publication Date
FR2512965A1 FR2512965A1 (fr) 1983-03-18
FR2512965B1 true FR2512965B1 (fr) 1985-06-28

Family

ID=11269417

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8213314A Expired FR2512965B1 (fr) 1981-07-31 1982-07-30 Dispositif d'equilibrage fin pour appareil de mesure de gradient a derivee seconde, possedant trois enroulements, pour la mesure de signaux magnetiques faibles

Country Status (4)

Country Link
US (1) US4523147A (fr)
DE (1) DE3228145A1 (fr)
FR (1) FR2512965B1 (fr)
IT (1) IT1171429B (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8326581D0 (en) * 1983-10-05 1983-11-09 Picker Int Ltd Detecting variations in magnetic fields
US4694567A (en) * 1984-11-19 1987-09-22 Siemens Aktiengesellschaft Method for making a superconducting gradiometer having a three-dimensional structure and associated connecting lines for a device for measuring weak magnetic fields
US4644273A (en) * 1985-07-02 1987-02-17 The United States Of America As Represented By The Secretary Of The Navy Five-axis optical fiber gradiometer
DE3775656D1 (de) * 1986-08-13 1992-02-13 Siemens Ag Squid-magnetometer fuer eine ein- oder mehrkanalige vorrichtung zur messung sehr schwacher magnetfelder.
US4827217A (en) * 1987-04-10 1989-05-02 Biomagnetic Technologies, Inc. Low noise cryogenic apparatus for making magnetic measurements
US4914381A (en) * 1987-05-28 1990-04-03 Barrigar & Oyen Direct-coupled fluxgate current sensor
DE3906981A1 (de) * 1989-03-04 1990-09-06 Philips Patentverwaltung Supraleitendes gradiometer zur messung schwacher magnetfelder und ein verfahren zu seiner herstellung
EP0625712B1 (fr) * 1989-07-10 1997-09-24 Fujitsu Limited Ensemble de bobines de captage pour une gradomètre magnétique multicanal à SQUID
US5132620A (en) * 1990-05-21 1992-07-21 The Boeing Company Surface/subsurface corrosion detector with optical paths alterable by magnetically sensitive transducers
US20030141868A1 (en) * 2001-08-23 2003-07-31 Bakharev Alexander A. High balance gradiometer
GB0424717D0 (en) * 2004-11-09 2004-12-08 Metis Instr & Equipment N V Sensor for measuring magnetic flux
UA102163C2 (ru) 2012-02-02 2013-06-10 Владимир Николаевич Сосницкий Устройство для компенсации электромагнитных помех при измерениях биомагнитных сигналов
US9091664B2 (en) 2012-06-07 2015-07-28 Thomas Krause Pulsed eddy current sensor for precision measurement at-large lift-offs on metallic surfaces

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2475829A (en) * 1943-01-28 1949-07-12 Hartford Nat Bank & Trust Co High-frequency inductive coupling
US2445979A (en) * 1943-12-31 1948-07-27 Zenith Radio Corp Coil mounting
US2574229A (en) * 1947-11-14 1951-11-06 Motorola Inc Flywheel synchronization system
US2961604A (en) * 1950-10-11 1960-11-22 Earl A Schuchard Apparatus and method for detecting and recording total magnetic field gradients
US2906944A (en) * 1955-05-16 1959-09-29 Schlumberger Well Surv Corp Methods for investigating wells
US3262309A (en) * 1964-04-21 1966-07-26 Marvin E Anderson Strain gage
US3425015A (en) * 1966-04-01 1969-01-28 Magnavox Co Magnetically coupled core and coil having relative movement
US3428929A (en) * 1967-05-12 1969-02-18 Amerline Corp Coil receiving structure
US3753096A (en) * 1971-02-04 1973-08-14 Automation Ind Inc Eddy current flaw detection system with left off compensation
US3848183A (en) * 1973-04-20 1974-11-12 Magnaflux Corp Eddy current testing system having concentric coils, one being movable for balancing
US3965411A (en) * 1974-01-21 1976-06-22 Develco, Inc. Gradient wound trim coil for trimming a primary pickup coil
US3956690A (en) * 1974-01-21 1976-05-11 Develco, Inc. Trimmed superconductive magnetic pickup coil circuits
US3980076A (en) * 1974-10-02 1976-09-14 The Board Of Trustees Of Leland Stanford Junior University Method for measuring externally of the human body magnetic susceptibility changes
US3961245A (en) * 1974-11-20 1976-06-01 Schonstedt Instrument Company Magnetic locator having improved sensors
US3976938A (en) * 1974-12-09 1976-08-24 Superconducting Technology, Inc. Superconducting magnetic sensor with improved balancing system
US3962628A (en) * 1975-04-14 1976-06-08 The United States Of America As Represented By The Secretary Of The Navy Adjustable magnetic gradiometer
DE2929404C2 (de) * 1979-07-20 1983-10-27 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Differenzfeldsonde

Also Published As

Publication number Publication date
US4523147A (en) 1985-06-11
DE3228145A1 (de) 1983-03-31
IT1171429B (it) 1987-06-10
FR2512965A1 (fr) 1983-03-18
IT8149023A0 (it) 1981-07-31

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Legal Events

Date Code Title Description
ST Notification of lapse