Measuring and testing – Gravitational determination
Patent
1987-12-03
1989-06-27
Levy, Stewart J.
Measuring and testing
Gravitational determination
73382R, 73517R, G01V 700, G01V 706, G01V 708
Patent
active
048417726
ABSTRACT:
Each accelerometer includes a cylindrical proof mass made of a superconducting material. Each proof mass includes annular upper and lower hollowed out portions longitudinally surrounded by a cylindrical exterior wall. Common mode and differential mode sensing coils are arranged adjacent a bottom-side surface of the proof mass in one hollowed out annular portion and a levitation coil is arranged adjacent a bottom-side surface of the proof mass in the other hollowed out annular portion. The common mode, differential mode and levitation coils are connected in respective first, second and third superconducting circuits. The first circuit produces common mode signals indicative of forces acting on both accel
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Bell Robert P.
Levy Stewart J.
University of Maryland College Park
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