Adaptive circuits and methods for reducing vibration or shock induced errors in inertial sensors
US7401515B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2006 |
| Grant date | Jul 22, 2008 |
| Priority date | — |
| Expiry date | Jul 20, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/5726
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Adaptive circuits and methods for reducing vibration-induced bias errors in inertial sensors. An adaptive circuit for reducing vibration or shock induced errors in an inertial sensor having a proof mass and sense electrode may include a sense bias voltage source, a charge amplifier, a device for detecting and/or anticipating an external vibration or shock on the inertial sensor, and a device for selectively dampening the proof masses and/or adjusting the gain sensitivity of the charge amplifier in response to an external vibration or shock on the inertial sensor. A dampening resistive element may be provided to dampen the proof mass motion in response to an external vibration or shock on the inertial sensor. Alternatively, or in addition, the gain sensitivity of the rate signal outputted by the charge amplifier can be adjusted in response to an external vibration or shock on the inertial sensor. During operation, the dampening and/or gain sensitivity can be adjusted to prevent signal saturation or clipping from occurring in the sense electronics, allowing the inertial sensor to continue functioning during periods of vibration or shock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.