Mobile plate accelerometer with electrostatic feedback motor
US6497149B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2000 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Apr 10, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/131
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A slave mobile plate accelerometer using variations of capacitance to detect the movement of a mass. The apparatus comprises at least one pair of fixed electrodes rigidly attached to an armature, and at least one mobile electrode suspended by springs from the armature, between the two fixed electrodes of each pair of fixed electrodes, to form two capacitors, each mobile electrode being adapted to move between the fixed electrodes of each pair of fixed electrodes, due to the effect of acceleration, so causing a variation of the capacitance of each capacitor. The accelerometer further includes an electronic circuit for adjusting the electrostatic stiffness of at least one combination of a fixed electrode and a mobile electrode and a control system for detecting the variation of the capacitance of each capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.