Relaxor-based piezoelectric single crystal accelerometer
US8915139B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2011 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | Nov 15, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/0922
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A cantilever beam accelerometer design is disclosed that obviates the need of attaching electrical leads directly to the piezoelectric plates. According to one aspect of the invention, two identical proof-masses are positioned on top of each piezoelectric plate in a symmetrical fashion. In advance of attaching the masses to the plates, electrical leads are attached to the masses by some suitable technique such as soldering. Each proof-mass is positioned on its respective piezoelectric plate as close to the free-end of the beam as practical, to keep the size of the mass reasonably small. The disclosed concept is useful for both series and parallel configurations of the piezoelectric plates, wherein the polarization vectors are in opposite directions for two plates connected in series and the polarization vectors are in the same direction for two plates connected in parallel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.