Turbine blade proximity sensor and control system
US7554324B2 · kind B2 · utility
25Cited by
28References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 28, 2003 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | Dec 13, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D17/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A proximity sensor system uses a sensor coil as the frequency determining element of an oscillator circuit. The frequency of the oscillator circuit is thus modulated based on the proximity of the sensor coil to a conductive element, thereby supplying a frequency modulated sensor signal. A frequency modulation (FM) detector circuit demodulates the sensor signal, and supplies a signal having an amplitude that varies with, and is representative of, the proximity of the sensor coil to the conductive element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.