Actuatory and gravity gradiometer

Details Actuatory and gravity gradiometer Actuatory and gravity gradiometer

2006-08-31

2010-11-02

Williams, Hezron (Department: 2856)

Measuring and testing

Gravitational determination

C073S38200R

Reexamination Certificate

active

07823448

ABSTRACT:
A gravity gradiometer is disclosed which has a sensor in the form of bars (41and42) which are supported on a mounting (5) which has a first mount section (10) and a second mount section (20). A first flexure web (33) pivotally couples the first and second mount sections about a first axis. The second mount has a first part (25), a second part (26) and a third part (27). The parts (25and26) are connected by a second flexure web (37) and the parts (26and27) are connected by a third flexure web (35). The bars (41and42) are located in housings (45and47) and form a monolithic structure with the housings (45and47) respectively. The housings (45and47) are connected to opposite sides of the second mount section20.The bars (41and42) are connected to their respective housings by flexure webs (59). Transducers (71) are located in proximity to the bars for detecting movement of the bars to in turn enable the gravitational gradient tensor to be measured. An actuator is provided for moving the mount to stabilize the mount. The actuator comprises a hollow disc housing (310) which defines a chamber (312). A coil plate (313) is located in the chamber (312) and supports windings (W1and W2). A tube (330) supports a hollow rod (328) to minimize flux leakage from the windings (W1and W2). Lead wires for the windings pass through the rod (328) to the windings (W1and W2) mounted on the support plate (313).

REFERENCES:
patent: 2743415 (1956-04-01), Williams et al.
patent: 2809524 (1957-10-01), Masterson
patent: 3012191 (1961-12-01), Miller et al.
patent: 3273397 (1966-09-01), Forward
patent: 3564921 (1971-02-01), Bell
patent: 3758854 (1973-09-01), Zimmerman
patent: 3805398 (1974-04-01), Russell et al.
patent: 3926054 (1975-12-01), Buck
patent: 3956690 (1976-05-01), Rorden
patent: 4024468 (1977-05-01), Hirschi
patent: 4398167 (1983-08-01), Dickie et al.
patent: 4713890 (1987-12-01), Wells et al.
patent: 4803413 (1989-02-01), Kendig et al.
patent: 4809545 (1989-03-01), Lyle
patent: 4828376 (1989-05-01), Padera
patent: 4841772 (1989-06-01), Paik
patent: 5130654 (1992-07-01), Mermelstein
patent: 5224380 (1993-07-01), Paik
patent: 5293119 (1994-03-01), Podney
patent: 5326986 (1994-07-01), Miller et al.
patent: 5488295 (1996-01-01), Seppa
patent: 5505555 (1996-04-01), Van Kann et al.
patent: 5587526 (1996-12-01), Lumley et al.
patent: 5589772 (1996-12-01), Kugai
patent: 5668315 (1997-09-01), Van Kann et al.
patent: 5728935 (1998-03-01), Czompo
patent: 5804722 (1998-09-01), Van Kann et al.
patent: 5817939 (1998-10-01), Lumley et al.
patent: 5922951 (1999-07-01), O'Keefe et al.
patent: 5962781 (1999-10-01), Veryaskin
patent: 6082194 (2000-07-01), Gladwin
patent: 6450028 (2002-09-01), Vail, III
patent: 6494091 (2002-12-01), Couture
patent: 6526825 (2003-03-01), Manson
patent: 6612171 (2003-09-01), Stephenson et al.
patent: 6658935 (2003-12-01), Feinberg
patent: 6668646 (2003-12-01), Davies et al.
patent: 6724188 (2004-04-01), Butters et al.
patent: 6837106 (2005-01-01), Etkin et al.
patent: 6882937 (2005-04-01), McElhinney
patent: 6885192 (2005-04-01), Clarke et al.
patent: 6954698 (2005-10-01), Tryggvason
patent: 7053610 (2006-05-01), Clarke et al.
patent: 7081747 (2006-07-01), Butters et al.
patent: 7305879 (2007-12-01), Moody et al.
patent: 7360419 (2008-04-01), French et al.
patent: 7584544 (2009-09-01), Van Kann et al.
patent: 2002/0092350 (2002-07-01), Etkin et al.
patent: 2003/0033086 (2003-02-01), Lee et al.
patent: 2004/0211255 (2004-10-01), Leeuwen et al.
patent: 2005/0116717 (2005-06-01), Dransfield et al.
patent: 2005/0160815 (2005-07-01), Lee
patent: 2005/0236909 (2005-10-01), Baker, Jr.
patent: 2006/0117848 (2006-06-01), Raffalt
patent: 2006/0156810 (2006-07-01), Brett et al.
patent: 2006/0207326 (2006-09-01), Moody et al.
patent: 2006/0277993 (2006-12-01), Wang et al.
patent: 2007/0241747 (2007-10-01), Morley et al.
patent: 2008/0074113 (2008-03-01), Clarke et al.
patent: 2008/0115374 (2008-05-01), Van Kann et al.
patent: 2008/0115375 (2008-05-01), Van Kann
patent: 2008/0115376 (2008-05-01), Van Kann
patent: 2008/0115377 (2008-05-01), Van Kann
patent: 2008/0115578 (2008-05-01), Van Kann et al.
patent: 2008/0116905 (2008-05-01), Van Kann
patent: 2008/0120858 (2008-05-01), Van Kann et al.
patent: 2008/0121035 (2008-05-01), Van Kann et al.
patent: 2008/0121036 (2008-05-01), Van Kann et al.
patent: 2008/0122435 (2008-05-01), Van Kann et al.
patent: 2008/0163682 (2008-07-01), Van Kann et al.
patent: 2008/0173090 (2008-07-01), Van Kann et al.
patent: 2008/0236277 (2008-10-01), Van Kann et al.
patent: 2008/0257038 (2008-10-01), Van Kann et al.
patent: 2008/0282796 (2008-11-01), Van Kann et al.
patent: 2008/0302179 (2008-12-01), Van Kann et al.
patent: 2008/0302180 (2008-12-01), Van Kann et al.
patent: 2008/0307883 (2008-12-01), Van Kann et al.
patent: 1278067 (2000-12-01), None
patent: 197 51 724 (1999-07-01), None
patent: 2002-40155 (2002-06-01), None
patent: 2 046 380 (1995-10-01), None
patent: 2 056 642 (1996-03-01), None
patent: 2 127 439 (1999-03-01), None
patent: 2 156 481 (2000-09-01), None
patent: 2 167 437 (2001-05-01), None
patent: 2 171 481 (2001-07-01), None
patent: 2 171 482 (2001-07-01), None
patent: 2 171 483 (2001-07-01), None
patent: 2 172 967 (2001-08-01), None
patent: 2 175 773 (2001-11-01), None
patent: 2 221 263 (2004-01-01), None
patent: 2 242 032 (2004-12-01), None
patent: 2 253 138 (2005-05-01), None
patent: 2 253 882 (2005-06-01), None
patent: 2 290 674 (2005-10-01), None
patent: WO 90/07131 (1990-06-01), None
patent: 97/41459 (1997-11-01), None
patent: 00/31550 (2000-06-01), None
patent: 02/44757 (2002-06-01), None
patent: WO 2008/061282 (2008-05-01), None
Soundararajan et al., “Nonideal Negative Resistors and Capacitors Using an Operational Amplifier”, IEEE Transactions on Circuits and Systems, vol. 22, No. 9, 1975; pp. 760-763.
Paik, H., Superconducting tunable-diaphragm transducer for sensitive acceleration measurements, Journal of Applied Physics, vol. 47, No. 3, Mar. 1976, pp. 1168-1178.
Forward, R., “Electronic cooling of resonant gravity gradiometers”, Journal of Applied Physics, vol. 50, No. 1, Jan. 1979, pp. 1-6.
Paik, H., J., “Superconducting tensor gravity gradiometer”, Second International Symposium on Inertial Technology of Surveying and Geodesy, Banff, Canada, Jun. 1981.
Moody, M., et al., Superconducting gravity gradiometer for space and terrestrial applications:, Journal of Applied Physics, vol. 60, No. 12, Dec. 15, 1986, pp. 4308-4315.
Chan, H., et al, “Superconducting gravity gradiometer for sensitive gravity measurements”, Physical Review D., vol. 35, No. 12, Jun. 15, 1987, pp. 3551-3571.
Moody, M., et al., “Gauss's Law Test of Gravity at Short Range”, Physical Review Letters, vol. 70, No. 9, Mar. 1, 1993, pp. 1195-1198.
Paik, H., et al., 6 page reprint of “Airborne/shipborne SGG Survey System”, Proceedings of the International Symposium on Kinematic Systems in Geodesy, Geomatics and Navigation, Banff, Canada, Jun. 1997, pp. 565-570.
Moody, M., et al., “Three-axis superconducting gravity gradiometer for sensitive gravity measurements”, Review of Scientific Instruments, vol. 73, No. 11, Nov. 2002, pp. 3957-3974.
Moody, M., et al,., “Principle and performance of a superconducting angular accelerometer”, Review of Scientific Instruments, vol. 74, No. 3, Mar. 2003, pp. 1310-1318.
Nadal-Guardia et al., “Constant Charge Operation of Capacitor Sensors Based on Switched Current Circuits”, IEEE Sensors Journal, vol. 3, No. 6, Dec. 6, 2003, pp. 835-842.
International Preliminary Report on Patentability issued in connection with PCT/AU2006/001270 dated Oct. 16, 2007.
Robert Matthews, “The University of Western Australia Gravity Gradiometer Group, Mobile Gravity Gradiometry,”Department of Physics-University of Western Australia, 2002, 454 pages.
Mark Helm Dransfield, “Airborne Gravity Gradiometry,”The University of Western Australia Department of Physics, 1994, 254 pages.
Robert David Penny, Development of Two Prototy

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