Title:
加速度計
Document Type and Number:
Japanese Patent JP3559604
Kind Code:
B2
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 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. In particular, a bead of relatively noncompliant epoxy is used for bonding the excitation ring and pole piece to the magnet. In order to further reduce thermal stresses, a ring of relatively compliant epoxy is disposed concentric to the noncompliant epoxy.
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Inventors:
Stephen A. Foot
Demon Earl Studdard
Demon Earl Studdard
Application Number:
JP2582095A
Publication Date:
September 02, 2004
Filing Date:
January 23, 1995
Export Citation:
Assignee:
Allied Signal, Inc.
International Classes:
G01P1/00; G01P15/125; G01P15/13; (IPC1-7): G01P15/125
Domestic Patent References:
| JP64012273A | ||||
| JP6289048A | ||||
| JP5302937A | ||||
| JP4301575A | ||||
| JP3231157A |
Attorney, Agent or Firm:
Masaki Yamakawa