Gravity gradiometer

Details Gravity gradiometer Gravity gradiometer

1996-05-12

1998-09-08

Williams, Hezron

Measuring and testing

Gravitational determination

G01M 112

Patent

active

058047220

ABSTRACT:
A gravity gradiometer for measuring off-diagonal components of the gravitational gradient tensor includes a housing comprising a pair of electromagnetic shield enclosures (22, 23) arranged one inside the other, and a body (25) including superconducting material mounted within the inner enclosure (23) for fine pivotal flexure about an axis passing substantially through the center of mass of the aforesaid body. An array of superconducting coils (30) is supported by the outer enclosure (22) and positioned in close proximity to the aforesaid body (25) for diamagnetically applying a rotational force to the body with respect to the axis of flexure and/or for responding by modulation of inductance to pivotal flexure of the body arising from a gravitational gradient across the body. The array is arranged to apply the rotational force in both rotational directions and to respond to flexure in either rotational direction. Also disclosed is a flexural pivot bearing which comprises a pair of members (28, 31) with opposed close-spaced faces. These faces are joined by a web (29), of microscopic thickness, in a plane intersecting the faces. The members and the web are consisted of an integral body of substantially uniform, material, and the members are adapted for pivoted mutual flexure about a pivot axis aligned along said web.

REFERENCES:
patent: 3052127 (1962-09-01), De Mott
patent: 3564921 (1971-02-01), Bell
patent: 5012216 (1991-04-01), Jin
Parke, J.W. et al. "Sensitivity Enhancement of Inertial Instruments by Means of Superconducing Spring" Aug. 31, 1984.
Chan, H.A. et al. "Superconducting Techniques for Gravity Survay and Inertal Navigation", Sep. 1984.
De Bra, D.B. "A Proposed Lunar Orbiting Gravity Gradiomater Experiment" Apr. 1942.
Chan, H.A. et al. "Superconducting gravity gradiometer for sensitive gravity measurements", The American Physical Society, vol. 35, No. 12, Jun. 15, 1987, pp. 3572-3597.
William C. Wells, "Spaceborne Gravity Gradiometers", NASA Conference Publication 2305, 1984, pp. 1-76.
Bra et al, "A Proposed Lunar Orbiting Gravity Gradiometer Experiment", pp. 103-112, Apr. 1972.
Forward, "Electronic cooling of resonant gravity gradiometers", Jul. 1978, pp. 1-6.
Suzuki et al., "Calibration of Gravitational Radiation Antenna by Dynamic Newton Field", Jul. 1981, pp. 498-500.

Affiliated with

Also associated with

Rating

Gravity gradiometer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Gravity gradiometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gravity gradiometer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1283376