Flux control groove

Details Flux control groove Flux control groove

1994-01-24

1996-06-11

Williams, Hezron E.

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

7351431, G01P 1513

Patent

active

055244882

ABSTRACT:
A 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 are used to form upper and lower 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 which are 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, rigidly secured to an excitation ring which forms a magnetic return path. A flux control groove is formed in the excitation ring to reduce leakage flux and flux concentration which would otherwise result in the magnetic return path at the magnet interface. By relieving the stress and leakage flux at the magnet interface, the accelerometer in accordance with the present invention will provide relatively stable output signals and not be particularly sensitive to temperature or environmental variations while providing relatively stable thermal hysteresis and drift performance.

REFERENCES:
patent: 2832932 (1958-04-01), Baermann
patent: 4182187 (1980-01-01), Hanson
patent: 4186609 (1980-02-01), Baermann
patent: 4250757 (1981-02-01), Hanson
patent: 4394405 (1983-07-01), Atherton
patent: 4399700 (1983-08-01), Hanson
patent: 4400979 (1983-08-01), Hanson et al.
patent: 4441366 (1984-04-01), Hanson
patent: 4555944 (1985-12-01), Hanson et al.
patent: 4555945 (1985-12-01), Hanson
patent: 4592234 (1986-06-01), Norling
patent: 4620442 (1986-11-01), MacGugan et al.
patent: 4697455 (1987-10-01), Norling
patent: 4726228 (1988-02-01), Norling
patent: 4932258 (1990-06-01), Norling
patent: 4944184 (1990-07-01), Blake et al.
patent: 5024089 (1991-06-01), Norling
patent: 5085079 (1992-02-01), Holdren et al.
patent: 5090243 (1992-02-01), Holdren et al.
patent: 5097172 (1992-03-01), Becka
patent: 5111694 (1992-05-01), Foote
patent: 5182949 (1993-02-01), Rupnick et al.
patent: 5194771 (1993-03-01), Otsuki
patent: 5203210 (1993-04-01), Terry et al.
patent: 5212984 (1993-05-01), Norling et al.
patent: 5220831 (1993-06-01), Lee

Affiliated with

Also associated with

Rating

Flux control groove does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flux control groove, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flux control groove will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-346429