Measuring and testing – Gravitational determination
Reexamination Certificate
2005-05-31
2005-05-31
Williams, Hezron (Department: 2856)
Measuring and testing
Gravitational determination
C073S514170, C073S514190, C073S514310, C310S090500, C033S345000
Reexamination Certificate
active
06898970
ABSTRACT:
An extremely sensitive accelerometer suitable for use in extreme temperatures such as those encountered during space travel is formed by levitating a magnet in a box or sphere composed of diamagnetic material such as pyrolytic carbon, and a means for measuring the position of the magnet within the enclosure is provided so that over time, the position of the magnet can be monitored. Knowing the mass of the suspended magnet, the displacement over time of the magnetic can be used to calculate acceleration, which can then be used to determine position of a space vehicle.
REFERENCES:
patent: 3626364 (1971-12-01), Simon et al.
patent: 3664196 (1972-05-01), Codina
patent: 3680393 (1972-08-01), Rogall
patent: 3706217 (1972-12-01), Slater et al.
patent: 3815963 (1974-06-01), Wilk
patent: 4344235 (1982-08-01), Flanders
patent: 4430803 (1984-02-01), Flanders
patent: 4573356 (1986-03-01), Barmatz et al.
patent: 4711125 (1987-12-01), Morrison
patent: 4737774 (1988-04-01), Chapman et al.
patent: 4901571 (1990-02-01), Reinhardt et al.
patent: 4984463 (1991-01-01), Idogaki et al.
patent: 5149925 (1992-09-01), Behr et al.
patent: 5159406 (1992-10-01), Adler et al.
patent: 5203209 (1993-04-01), Watkins et al.
patent: 5224380 (1993-07-01), Paik
patent: 5396136 (1995-03-01), Pelrine
patent: 5922955 (1999-07-01), Brun et al.
patent: 6465739 (2002-10-01), Shepherd et al.
patent: 6679118 (2004-01-01), Esashi et al.
patent: 2211497 (1989-07-01), None
“Diamagnetic Levitation” by Martin Simon, downloaded on May 28, 2003 from http://www.physics.ucla.edu/marty/diamag/index.html, 3 pages.
“Technical Note: A High Performance Surface Micromachined Accelerometer for Machine Health and Tactical Inertial Applications” downloaded on Mar. 23, 2004 from http://www.analog.com/Analog_Root/sitePage/mainSect, 2 pages.
“ONI-23505 OEM Digital IMU Module”, published by O-Navi, LLC, 2 pages.
“Electric Propulsion System—The Ion Drive”, downloaded on Mar. 23, 2004 from http://www.thespacesite.com.
“Xsens Motion Technologies”, downloaded on Mar. 23, 2004 from http://www.xsens.com/technology.htm.
“MT9 Inertial 3D Motion Tracker”, XSens Motion Technologies, published by Xsens Technologies B.V., 2 pages.
“The Accelerometer Proof Mass Offset Calibration of Grace,” Furun Wang, Byron D. Tapley, Srinivas V. Bettadpur, Yanqing Liu, downloaded on Feb. 05, 2004 from ltircw08@STFVM1.vnet.ibm.com.
“Theoretical and Experimental Results of the Mechanical Behavior For a New Optical Accelerometer,” F. Viadero, P. Mottier, R. Sancibrian, E. Ollier, A. Fernandez, and F. Encinas, downloaded on Feb. 05, 2004 from ltircw08@STFVM1.vnet.ibm.com.
Frantz Robert H.
Miller Rose M.
Walker Mark S.
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