Resonant torsion pendulum pressure sensor
US6532822B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Sep 26, 2000 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Feb 12, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure responsive mechanically resonant sensor device is provided that comprises a torsion pendulum driven at resonance. The pressure sensor includes a rigid frame to which is affixed a torsion pendulum comprising a hollow tube and a resonant mass as well as optimal means for applying energy to drive the torsion pendulum at resonance. The interior of the hollow tube portion of the torsion pendulum communicates through a pressure port in the rigid frame with the fluid whose pressure is to be sensed. The input pressure affects the torsion constant of the hollow tube and therefor changes the resonant frequency of the torsion pendulum, which frequency is converted into an indication of the sensed pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.