High temperature resonant transmission line sensor and methods
US7092840B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 2004 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Aug 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/48
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A position sensing system uses a resonant transmission line having a moveable dielectric as a position sensor. The system includes circuitry that supplies a drive signal to the resonant transmission line, which reflects the drive signal. Based on a standing wave signal, which is generated from the drive signal and the reflected drive signal, the circuitry determines the frequency of the sensor drive signal relative to a resonant frequency of the resonant transmission line, and adjusts the sensor drive signal frequency to match a resonant frequency of the transmission line. The circuitry determines the relative position of the moveable dielectric based on the adjusted sensor drive signal frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.