Sensing apparatus
US8904868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2012 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Jan 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P2015/0814
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensing apparatus includes an acceleration sensing unit, for measuring an acceleration applied to a proof mass, further including: a proof mass; a carrier signal source, for providing a carrier signal; a capacitive half-bridge, including a first and a second capacitor, wherein each capacitor is coupled to the proof mass and the carrier signal source, one with a positive electrode and the other one with a negative electrode, and the acceleration applied to the proof mass makes the carrier signal flow through the first and the second capacitor so that the first capacitor and the second capacitor respectively generates a first voltage and a second voltage variation which have opposite phases with each other; and an instrumentation amplifier, for receiving and amplifying the first voltage and the second voltage variation, whereby the magnitude and the direction of the acceleration applied to the proof mass is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.