Rotational speed detection unit
US5663641A · kind A · utility
20Cited by
8References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1995 |
| Grant date | Sep 2, 1997 |
| Priority date | — |
| Expiry date | Nov 13, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/487
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rotational speed detection unit has a rotating tone wheel, a pole piece and a stationary sensor comprising a magnetic wire of the Wiegand wire or amorphous magnetostriction wire and a coil such that the tone wheel has an outer periphery with the alternative N and S poles with a uniform pitch, that one end of the sensor is connected to one end of the pole piece, and that as the tone wheel rotates, the other end of the sensor and the other end of the pole piece are magnetically connected to the N and S poles of the tone wheel, respectively, and vice versa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.