Arrangements for magnetic field sensors that act as movement detectors
US10041810B2 · kind B2 · utility
15Cited by
237References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2016 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Jun 8, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/147
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Magnetic field sensors can sense speed of movement and direction of movement of a ferromagnetic object. The magnetic field sensors employ both planar Hall effect elements and vertical Hall effect elements to generate two-state signals in two different signal paths with relative phases that are ninety degrees apart, the ninety degrees having sufficient margin to aid in detection of the direction of motion. Other magnetic field sensors use at least four vertical Hall effect elements to identify a speed of rotation and a direction of rotation of a moving ferromagnetic object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.