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US 11,693,022 B2Granted
High-G and high-precision piezoelectric-based linear accelerometers
AssigneeOmnitek Partners LLC
InventorJahangir S Rastegar
Life of this patent
Estimating the term…
Abstract
An accelerometer including: a housing having an internal cavity; a piezoelectric material disposed in the internal cavity; a mass movable disposed in the internal cavity; and a spring disposed between the piezoelectric material and a portion of the housing, the spring being compressively preloaded against the piezoelectric material; wherein the mass is movable when the housing experiences an acceleration such that the mass acts upon the spring and the spring acts against the piezoelectric material, the piezoelectric material outputting a signal corresponding to a magnitude of the acceleration.
Claims20
An accelerometer comprising:
- a housing having an internal cavity;
- a piezoelectric material disposed in the internal cavity;
- a mass disposed in the internal cavity to be movable towards the piezoelectric material, the mass directly abutting on a surface of the housing, the surface opposing the mass in a direction of an acceleration of the housing;
- and
- a spring disposed between the piezoelectric material and the mass to bias the mass away from the piezoelectric material in abutment against the surface of the housing such that the spring is compressively preloaded against the piezoelectric material;
- wherein the mass is movable when the housing experiences the acceleration such that the mass acts upon the spring and the spring acts against the piezoelectric material, the piezoelectric material outputting a signal corresponding to a magnitude of the acceleration.
3 more elements
An accelerometer comprising:
- a housing having first and second internal cavities;
- a first piezoelectric material disposed in the first internal cavity;
- a second piezoelectric material disposed in the second internal cavity;
- a first mass disposed in the first internal cavity to be movable towards the first piezoelectric material, the first mass directly abutting on a first surface of the housing, the first surface opposing the mass in a first direction of a first acceleration of the housing;
- a second mass disposed in the second internal cavity to be movable towards the second piezoelectric material, the second mass directly abutting on a second surface of the housing, the second surface opposing the second mass in a second direction of a second acceleration of the housing;
- a first spring disposed between the first piezoelectric material and the first mass to bias the first mass away from the piezoelectric material in abutment against the first surface of the housing such that the first spring is compressively preloaded against the first piezoelectric material;
- and
- a second spring disposed between the second piezoelectric material and the second mass to bias the second mass away from the piezoelectric material in abutment against the second surface of the housing such that the second spring is compressively preloaded against the second piezoelectric material;
- wherein the first mass is movable when the housing experiences the first acceleration in the first direction such that the first mass acts upon the first spring and the first spring acts against the first piezoelectric material, the first piezoelectric material outputting a first signal corresponding to a magnitude of the first acceleration;
- and
- the second mass is movable when the housing experiences the second acceleration in the second direction such that the second mass acts upon the second spring and the second spring acts against the second piezoelectric material, the second piezoelectric material outputting a second signal corresponding to a magnitude of the second acceleration, the first acceleration being in a direction different from a direction of the second acceleration.
8 more elements
Dependencies are inferred from the claim text.