Magnetoresistive sensor for detecting position or speed of a ferromagnetic body
US4712064A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1986 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Feb 26, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N50/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetoresistive sensor used for emitting of electric signals in dependency on the position or the speed of a ferromagnetic body includes magnetoresistive measuring strips (10) on a substrate (12) which are exposed to a stationary magnetic field (H) such that a large field component (H.sub.y) extends perpendicular to the measuring strips and a substantially smaller field component (H.sub.x) in the plane of the measuring strips and at an angle of about 45.degree. to the direction of a measuring current flowing through the measuring strips. By approaching a ferromagnetic body (14) to the stationary field (H) additional field components (H.sub.z and H.sub.t) start acting on the measuring strips. The magnetic field component H.sub.t generated in the plane of the measuring strips changes in dependency on the position or speed of the ferromagnetic body and affects measuring current accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.