Angular rate sensor with improved aging properties
US9234907B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2011 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | May 15, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/5677
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An angular velocity sensor is described with improved ageing and hysteresis properties. The sensor may be of a ring type driven by a driver circuit, the sensor further comprising primary and secondary portions having corresponding signal pickoffs. The gain of the primary pickoff signal and the capacitance of the primary portions of the sensor are controlled relative to the gain of the secondary pickoff and the capacitance of the secondary portions of the sensor. Control electronics is provided that enables matching of the relative signals from the respective channels. In this way, temperature hysteresis and ageing effects of materials used in forming the sensor are overcome.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.