WO2010040997A8 - Gradiometer for measuring gravitational and magnetic field gradients with improved sensor - Google Patents

Gradiometer for measuring gravitational and magnetic field gradients with improved sensor Download PDF

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Publication number
WO2010040997A8
WO2010040997A8 PCT/GB2009/002381 GB2009002381W WO2010040997A8 WO 2010040997 A8 WO2010040997 A8 WO 2010040997A8 GB 2009002381 W GB2009002381 W GB 2009002381W WO 2010040997 A8 WO2010040997 A8 WO 2010040997A8
Authority
WO
WIPO (PCT)
Prior art keywords
sensing
ribbon
magnetic field
displacement
generate
Prior art date
Application number
PCT/GB2009/002381
Other languages
French (fr)
Other versions
WO2010040997A1 (en
Inventor
Alexey Veryaskin
Howard Golden
Wayne Mcrae
Original Assignee
Gravitec Instruments Limited
Tomlinson, Kerry, John
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 Gravitec Instruments Limited, Tomlinson, Kerry, John filed Critical Gravitec Instruments Limited
Publication of WO2010040997A1 publication Critical patent/WO2010040997A1/en
Publication of WO2010040997A8 publication Critical patent/WO2010040997A8/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
    • G01R33/022—Measuring gradient
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V7/00—Measuring gravitational fields or waves; Gravimetric prospecting or detecting
    • G01V7/005—Measuring gravitational fields or waves; Gravimetric prospecting or detecting using a resonating body or device, e.g. string

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

Apparatus (1,101) for the measurement of quasi-static gravity gradients and/or magnetic field gradients comprising: a flexible elongate ribbon (3,103) held under tension at both ends (5,7); sensing means (10,110) arranged to detect the transverse displacement of the ribbon (3,103) from an undisturbed position S due to the gravitational gradient or magnetic field gradient acting on said ribbon (3,103) and to generate a signal representing the displacement; and output means (35, 135) coupled to said sensing means (10,110) and responsive to said displacement signal to generate an output signal which is a function of the tensor of the gravitational gradient or magnetic field gradient; wherein the sensing means (10, 110) comprises: a coherent light source (11, 111) arranged to produce a coherent light beam (13, 113); beam directing means (15, 115) arranged to produce from the coherent light beam (13, 113) a sensing beam (19, 119) and to direct the sensing beam (19,119) onto the ribbon (3,103) at a first sensing position (23,123) from a transverse direction; and detecting means (33,133) arranged to detect the interferometric superposition of the sensing beam (19, 119) reflected from the surface of the ribbon (3,103) and another beam (21,121) and to generate said displacement signal.
PCT/GB2009/002381 2008-10-07 2009-10-07 Gradiometer for measuring gravitational and magnetic field gradients with improved sensor WO2010040997A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0818363.4 2008-10-07
GB0818363.4A GB2464151B (en) 2008-10-07 2008-10-07 Gradiometer for measuring gravitational and magnetic field gradients with improved sensor

Publications (2)

Publication Number Publication Date
WO2010040997A1 WO2010040997A1 (en) 2010-04-15
WO2010040997A8 true WO2010040997A8 (en) 2010-11-18

Family

ID=40042425

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2009/002381 WO2010040997A1 (en) 2008-10-07 2009-10-07 Gradiometer for measuring gravitational and magnetic field gradients with improved sensor

Country Status (2)

Country Link
GB (1) GB2464151B (en)
WO (1) WO2010040997A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2465634B (en) * 2008-11-28 2012-10-03 Gravitec Instr Ltd Gravitational gradiometer
US20130287508A1 (en) 2012-04-25 2013-10-31 Milwaukee Electric Tool Corporation Magnetic drill press
US9395465B2 (en) 2014-07-31 2016-07-19 Baker Hughes Incorporated Gravity and/or acceleration measurements using dual interferometer configurations
CN208929274U (en) 2016-02-01 2019-06-04 米沃奇电动工具公司 The retentivity of magnet drilling machine detects
CN105910758B (en) * 2016-04-25 2017-02-22 中国地震局地球物理研究所 Measuring mechanism for contact ratio of center of mass and optical center of falling body and measuring method and adjusting method thereof
CN113777671B (en) * 2021-08-10 2022-07-12 华中科技大学 Magnetic field effect evaluation method, device and system of rotary gravity gradiometer
CN114089234B (en) * 2021-11-08 2024-06-04 中国科学院电工研究所 Magnetic gradient measurement method and measurement device for superconducting magnetic levitation field
CN114488326B (en) * 2022-02-15 2023-07-28 中国自然资源航空物探遥感中心 Method and system for improving boundary capability of aeromagnetic data geologic body

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5017010A (en) * 1989-05-16 1991-05-21 International Business Machines Corporation High sensitivity position sensor and method
DK0784802T3 (en) * 1994-10-04 1999-12-06 Gravitec Instr Ltd Apparatus for measuring gravitational fields
GB9910932D0 (en) * 1999-05-11 1999-07-07 Gravitec Instr Ltd Measurement of magnetic fields
WO2001067122A2 (en) * 2000-03-09 2001-09-13 The Johns Hopkins University Force detected magnetic field gradiometer

Also Published As

Publication number Publication date
WO2010040997A1 (en) 2010-04-15
GB0818363D0 (en) 2008-11-12
GB2464151B (en) 2012-09-26
GB2464151A (en) 2010-04-14

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