CA2233598A1 - Apparatus for the measurement of gravitational fields - Google Patents

Apparatus for the measurement of gravitational fields

Info

Publication number
CA2233598A1
CA2233598A1 CA002233598A CA2233598A CA2233598A1 CA 2233598 A1 CA2233598 A1 CA 2233598A1 CA 002233598 A CA002233598 A CA 002233598A CA 2233598 A CA2233598 A CA 2233598A CA 2233598 A1 CA2233598 A1 CA 2233598A1
Authority
CA
Canada
Prior art keywords
string
pick
feed
output voltage
coils
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.)
Granted
Application number
CA002233598A
Other languages
French (fr)
Other versions
CA2233598C (en
Inventor
Alexey Vladimirovich Veryaskin
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.)
Gravitec Instruments Ltd
Original Assignee
Gravitec Instruments Limited
Alexey Vladimirovich Veryaskin
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, Alexey Vladimirovich Veryaskin filed Critical Gravitec Instruments Limited
Priority claimed from PCT/GB1995/002349 external-priority patent/WO1996010759A1/en
Publication of CA2233598A1 publication Critical patent/CA2233598A1/en
Application granted granted Critical
Publication of CA2233598C publication Critical patent/CA2233598C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

Apparatus for measuring gravitational fields comprising a superconducting string (1) fixed at both ends and forming part of a closed superconducting loop inductively coupled to two driving solenoids (L d1, L d2). Displacement of the string in response to a gravitational field is sensed by two magnetic flux transformers each comprising a signal coil and two pick-up coils (L p1, L p2). Pairs of pick-up coils lie in two perpendicular planes providing two independent channels of measurements. The two arms of each flux transformer are balanced to convert only the amplitudes of the string's antisymmetric natural modes into an output voltage. The output voltage of each channel is used to produce a feed-back current distribution (I y1, I y2) proximate and parallel to the string. By adjusting the feed-back current, the effective relaxation time and resonant frequency of the first antisymmetric mode of the string can be adjusted, while leaving the symmetric modes unchanged, thus increasing the apparatus' sensitivity to gravity gradients.
CA002233598A 1994-10-04 1995-10-04 Apparatus for the measurement of gravitational fields Expired - Fee Related CA2233598C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NZ26461094 1994-10-04
NZ264610 1994-10-04
PCT/GB1995/002349 WO1996010759A1 (en) 1994-10-04 1995-10-04 Apparatus for the measurement of gravitational fields

Publications (2)

Publication Number Publication Date
CA2233598A1 true CA2233598A1 (en) 1996-04-11
CA2233598C CA2233598C (en) 2006-04-04

Family

ID=36143345

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002233598A Expired - Fee Related CA2233598C (en) 1994-10-04 1995-10-04 Apparatus for the measurement of gravitational fields

Country Status (1)

Country Link
CA (1) CA2233598C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2465634A (en) * 2008-11-28 2010-06-02 Gravitec Instr Ltd Gravitational gradiometer
GB2471662A (en) * 2009-07-03 2011-01-12 Gravitec Instr Ltd A Gravitational Gradiometer comprising a flexible ribbon whose stiffness is modulated.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2508547B (en) * 2009-07-03 2014-07-23 Gravitec Instr Ltd Gravitational gradiometer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2465634A (en) * 2008-11-28 2010-06-02 Gravitec Instr Ltd Gravitational gradiometer
GB2465634B (en) * 2008-11-28 2012-10-03 Gravitec Instr Ltd Gravitational gradiometer
GB2471662A (en) * 2009-07-03 2011-01-12 Gravitec Instr Ltd A Gravitational Gradiometer comprising a flexible ribbon whose stiffness is modulated.
GB2471662B (en) * 2009-07-03 2014-06-11 Gravitec Instr Ltd Gravitational gradiometer

Also Published As

Publication number Publication date
CA2233598C (en) 2006-04-04

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MKLA Lapsed

Effective date: 20131004