Measuring and testing – Speed – velocity – or acceleration – Temperature compensator
Patent
1990-12-19
1993-02-16
Chapman, John E.
Measuring and testing
Speed, velocity, or acceleration
Temperature compensator
73517AV, G01P 1508
Patent
active
051860538
ABSTRACT:
Proofmass assembly for an accelerometer having transducers fabricated of crystalline quartz and other components fabricated of fused quartz. The assembly includes a main support, a frame pivotally connected to the support for pendulous movement about a hinge axis such that the frame moves with a component of motion along the sensing axis of the accelerometer, a proofmass connected to the frame for movement about a compensation axis spaced from and generally parallel to the hinge axis, and a pair of transducers connected between the proofmass and the support for sensing forces produced by acceleration of the proofmass along the sensing axis. Differences in thermal expansion between the transducers and the fused quartz components are taken up by rotation of the proofmass about the compensation axis, and the two parallel axes permit translational motion of the proofmass in response to acceleration along the sensing axis without rotation of the proofmass relative to the support.
REFERENCES:
patent: 4221131 (1980-09-01), Albert
patent: 4483194 (1984-11-01), Rudolf
patent: 4926689 (1990-05-01), Hanson
Egley Bert D.
Hanson Richard A.
Newell G. Richard
Chapman John E.
New SD Inc.
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