Tachometer for measuring speed and direction of shaft rotation with a single sensing element
US4142153A · kind A · utility
26Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1977 |
| Grant date | Feb 27, 1979 |
| Priority date | — |
| Expiry date | Feb 17, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A single proximity probe coil driven by a high frequency source excites eddy currents at the periphery of a conducting disc having one or more stair - stepped perturbations and detects the changing radial levels or distances of the perturbations as the disc rotates. The detected signal is processed to yield output signals representing shaft speed and direction of rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.