System and method for measurement incorporating a crystal resonator
US9201156B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2012 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | Mar 24, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system, method and device for interrogating a downhole environment in a borehole beneath a surface includes a source of electromagnetic energy, operable to transmit an electromagnetic signal in the borehole, a sensor module, including a passive resonating circuit including a crystal oscillator having a resonant frequency that varies with changes in the condition in the downhole environment to reflect the electromagnetic signal and to modulate the electromagnetic signal in response to a condition in the downhole environment in the borehole and a detector positionable to receive the reflected modulated electromagnetic signal. Embodiments include a power monitor and circuitry configured and arranged to measure an input frequency at a time when an inflection in the applied power is observed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.