WO1997031273A3 - Magnetic field measuring arrangement - Google Patents

Magnetic field measuring arrangement Download PDF

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Publication number
WO1997031273A3
WO1997031273A3 PCT/DE1997/000315 DE9700315W WO9731273A3 WO 1997031273 A3 WO1997031273 A3 WO 1997031273A3 DE 9700315 W DE9700315 W DE 9700315W WO 9731273 A3 WO9731273 A3 WO 9731273A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
analog
digital
compensation
compensation signal
Prior art date
Application number
PCT/DE1997/000315
Other languages
German (de)
French (fr)
Other versions
WO1997031273A2 (en
Inventor
Egon Zimmermann
Guenter Brandenburg
Uwe Clemens
Horst Halling
Original Assignee
Forschungszentrum Juelich Gmbh
Egon Zimmermann
Guenter Brandenburg
Uwe Clemens
Horst Halling
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 Forschungszentrum Juelich Gmbh, Egon Zimmermann, Guenter Brandenburg, Uwe Clemens, Horst Halling filed Critical Forschungszentrum Juelich Gmbh
Priority to EP97917233A priority Critical patent/EP0882241A2/en
Publication of WO1997031273A2 publication Critical patent/WO1997031273A2/en
Publication of WO1997031273A3 publication Critical patent/WO1997031273A3/en

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
    • G01R33/035—Measuring direction or magnitude of magnetic fields or magnetic flux using superconductive devices
    • G01R33/0354—SQUIDS
    • G01R33/0356—SQUIDS with flux feedback

Abstract

The invention concerns an arrangement for measuring magnetic fields using a SQUID. To that end, a hybrid regulation system is provided which comprises means for converting a measuring signal (1) from a SQUID (3) into a voltage signal (4) for an analog proportional controller (5), the compensation signal (6) calculated by the proportional controller (5) forming the input signal of a digital integral controller (9, 11, 13). This signal (6) is digitized by an analog-to-digital converter (9) and fed to an arithmetic-logic unit (11) which calculates the compensation signal (12) of the integral controller, and the digital signal (12) is converted by a digital-to-analog converter (13) into an analog signal (14). Finally, an analog summer (15) forms the total compensation signal (16) from the compensation signal (6) of the analog proportional controller (5) and the compensation signal (12) of the digital integral controller (14). The total compensation signal (16) is then converted into a compensation flow (8) via a linear voltage-flow converter (7). The arithmetic-logic unit (11) also controls a resetting unit and a fluxion counter and calculates the output signal (17).
PCT/DE1997/000315 1996-02-23 1997-02-21 Magnetic field measuring arrangement WO1997031273A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97917233A EP0882241A2 (en) 1996-02-23 1997-02-21 Magnetic field measuring arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19606655.7 1996-02-23
DE1996106655 DE19606655C2 (en) 1996-02-23 1996-02-23 Measuring device for measuring magnetic fields

Publications (2)

Publication Number Publication Date
WO1997031273A2 WO1997031273A2 (en) 1997-08-28
WO1997031273A3 true WO1997031273A3 (en) 1997-10-02

Family

ID=7786136

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/000315 WO1997031273A2 (en) 1996-02-23 1997-02-21 Magnetic field measuring arrangement

Country Status (3)

Country Link
EP (1) EP0882241A2 (en)
DE (1) DE19606655C2 (en)
WO (1) WO1997031273A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10139883C1 (en) * 2001-08-20 2003-06-05 Stl Systemtechnik Ludwig Gmbh Device for setting an operating point of a magnetic field sensor and a method therefor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672359A (en) * 1985-11-12 1987-06-09 Trw Inc. Superconducting analog-to-digital converter and digital magnetometer and related method for its use
US5469057A (en) * 1994-03-08 1995-11-21 University Of New Mexico Method and apparatus for extending the dynamic range of DC-squid measurements using a flux tracking loop

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0816692B2 (en) * 1990-09-30 1996-02-21 ダイキン工業株式会社 Magnetic flux lock method and device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672359A (en) * 1985-11-12 1987-06-09 Trw Inc. Superconducting analog-to-digital converter and digital magnetometer and related method for its use
US5469057A (en) * 1994-03-08 1995-11-21 University Of New Mexico Method and apparatus for extending the dynamic range of DC-squid measurements using a flux tracking loop

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DRUNG D: "DIGITAL FEEDBACK LOOPS FOR D.C. SQUIDS", CRYOGENICS, vol. 26, no. 11, 1 November 1986 (1986-11-01), pages 623 - 627, XP002001907 *
DRUNG D: "RECENT LOW TEMPERATURE SQUID DEVELOPMENTS", IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, vol. 4, no. 3, 1 September 1994 (1994-09-01), pages 121 - 127, XP000444733 *
KUNG P J ET AL: "A direct current superconducting quantum interference device gradiometer with a digital signal processor controlled flux-locked loop and comparison with a conventional analog feedback scheme", REVIEW OF SCIENTIFIC INSTRUMENTS, JAN. 1996, AIP, USA, vol. 67, no. 1, ISSN 0034-6748, pages 222 - 229, XP002037208 *

Also Published As

Publication number Publication date
DE19606655A1 (en) 1997-08-28
EP0882241A2 (en) 1998-12-09
WO1997031273A2 (en) 1997-08-28
DE19606655C2 (en) 2002-04-11

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