Magnetic liquid supported linear accelerometer
OwnerMichael King Russell, Anthony William Russellinventors
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Abstract
A linear accelerometer comprises a proof mass in the form of a permanent bar magnet located in a tube containing a magnetic fluid such as a liquid with particles of magnetic material suspended therein. A servo circuit responsive to A.C. energized sensing coils is used to energize a D.C. electromagnet to maintain the proof mass in a central position in the tube.
Claims3
A linear accelerometer having a proof mass comprising a permanent bar magnet located in an elongate chamber of length in the direction of its longitudinal axis substantially greater than its width in directions perpendicular to said longitudinal axis and substantially filled with a magnetic fluid, the bar magnet being supported by the magnetic fluid with the magnetic axis of the bar magnet parallel to the longitudinal axis of the chamber, servo means responsive to movement of the bar magnet in the direction of the axis thereof for maintaining the bar magnet in a desired position and means for providing an electrical signal indicative of the force exerted on the bar magnet by the servo means.
Dependencies are inferred from the claim text.