Low stress magnet interface for a force rebalance accelerometer
April 12, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2029282 Force balancing assembly for transducers Movable element with position sensing means for transducers Method of making force transducer flexure Force transducer flexure with conductors on surfaces in the neutral bending plane Force transducer flexure with conductors on surfaces in the neutral bending plane Flexure with electrical conductor Method and apparatus for producing a controlled preload on a transducer assembly Method and apparatus for producing a controlled preload on a transducer assembly by means of a composite material sleeve Suspension system for a transducer InventorsAssigneeApplicationNo. 420916 filed on 04/12/1995US Classes:73/514.23, Including a flexure support73/497, Temperature compensator73/514.17, Rebalance73/514.21Pendulum or beamExaminersPrimary: Williams, HezronAssistant: Kwok, Helen Foreign Patent References
International ClassesG01P 015/13G01P 015/08 AbstractA force rebalance accelerometer includes a proof mass suspended by one or more flexures between stationary mounted upper and lower excitation rings. Pick-off capacitance plates formed on opposing sides of the proof mass form capacitance elements whose capacitance varies in response to displacement of the proof mass to provide a displacement signal. The displacement signal is applied to one or more electromagnets, used to force the proof mass back to a null or at-rest position. The drive current applied to the electromagnets thus represents the force or acceleration applied to the accelerometer. The electromagnets include a magnet and a pole piece which forms a magnetic return path. In order to relieve stresses due to thermal expansion, the magnet is spaced apart from the pole piece to enable the bonding area to be constrained to a minimum which, in turn, reduces the overall stress on the accelerometer. | |
