Saw-based tachometer or RPM detector
US9817014B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2014 |
| Grant date | Nov 14, 2017 |
| Priority date | — |
| Expiry date | Jun 3, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/481
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided for determining a number of revolutions per minute (RPM) of a rotating object. The method includes transmitting interrogation signals at a regular period from a fixed antenna positioned adjacent to the rotating object. The method also includes transmitting echo signals from a sensor antenna positioned on the rotating object, in response to the interrogation signals. The method also includes counting a number of echo signals detected by the fixed antenna, during one revolution of the object. The method also includes determining the RPM of the rotating object based on the number of response signals and the regular period of the signals. A system is also provided for determining the number of revolutions per minute (RPM) of the rotating object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.