Measuring and testing – Vibration – Sensing apparatus
Patent
1989-11-13
1991-04-16
Chapman, John E.
Measuring and testing
Vibration
Sensing apparatus
73516R, 310 905, G01P 1508
Patent
active
050072927
ABSTRACT:
The multicomponent transducer of the present invention comprises a housing interior surfaces forming an enclosed cavity and a single inertial mass immersed in a magnetic fluid contained therein. The inertial mass is levitated in the magnetic fluid by means of ferrohydrodynamic forces. The housing cavity and the inertial mass are generally spherical in shape such that the inertial mass is substantially unconstrained with respect to the directions of motion to which it is responsive. The multicomponent transducer also includes a motion sensing system for sensing selected components of motion of the inertial mass and for generating signals representative of the magnitude and periodicity of the relative motion of the inertial mass with respect to the housing along one or more separate axes. The multicomponent transducer of the present invention has amplitude and phase responses similar to those of conventional transducers.
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Cordell Ralph L.
Crowe Christopher
Kahng Seun K.
Amoco Corporation
Chapman John E.
Finley Rose M.
Stanley Timothy D.
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