Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1987-08-20
1988-09-27
Tokar, Michael J.
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
G01K 1500
Patent
active
047732660
ABSTRACT:
Methods are described for rapidly damping oscillation of an acoustically levitated object or for causing and maintaining such oscillations, and a method is provided for determining the restoring force constant K on the levitated object by measuring its frequency of oscillation. Oscillations of a levitated object are damped by applying levitating acoustic energy at a frequency slightly less than the center resonant frequency. Oscillations are maintained by applying acoustic energy slightly greater than the center resonant frequency. The restoring force constant of the levitation force is proportional to square of the frequency of oscillation of the object.
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E. H. Trinh, "Compact Acoustic Levitation Device for Studies in Fluid Dynamics and Material Science in the Laboratory and Microgravity," Rev. Sci. Instrum. 56 (11), Nov., 1985, pp. 2059-2065.
Barmatz Martin B.
Garrett Steven L.
Bell Robert
Jones Thomas H.
Manning John R.
McCaul Paul F.
The United States of America as represented by the Administrator
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