Apparatus for determining frequency versus acceleration characteristics for crystals
US4578634A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1985 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Aug 29, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The disclosed apparatus for determining the acceleration induced changes in the electrical characteristics of a quartz crystal includes all the apparatus necessary for subjecting the crystal to random acceleration forces and simultaneously determining the electrical characteristics of the crystal. More specifically a vibration generator is provided to subject the crystal under test to random vibrations of a predetermined acceleration. A low noise signal generator provides a signal at the resonant frequency of the crystal. The crystal couples the output of the low noise signal generator to a phase detector to determine the phase shift of the crystal. The output signal of the phase shift detector is analyzed to determine the acceleration versus electrical characteristics of the crystal under test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.