Electromagnetic transducer for exciting and sensing vibrations of resonant structures
US9995715B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 2015 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Apr 5, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fluid properties measurement device, including a magnetically excited and sensed resonator and a resonator electromagnetic excitation assembly, including an excitation coil driven by an electrical network, electrically connected to the excitation coil. The excitation coil is positioned so that a varying magnetic field produced by the excitation coil will drive the resonator in a pattern of resonating movement that has predetermined characteristics. Also, an electromagnetic sensing assembly, including a gradiometric sense coil is positioned so that an electromagnetic field originating due to movement of the resonator in a pattern having the predetermined characteristics, will create a time-varying gradient across the sense coil. Finally, a signal sensing electrical network is electrically connected to the sense coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.