Dual Z-axis magnetoresistive angle sensor
US10690515B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2015 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Aug 17, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/098
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dual Z-axis magnetoresistive angle sensor comprising a circular permanent magnet encoding disc, two Z-axis magnetoresistive sensor chips, and a PCB, two Z-axis magnetoresistive sensors are placed on the PCB. The magnetic sensing directions of the Z-axis magnetoresistive sensors are orthogonal to the substrate. Each Z-axis magnetoresistive sensor chip comprises a substrate and at least one magnetoresistive sensor located on the substrate. The magnetic field sensitive direction of the magnetoresistive sensor is perpendicular to the substrate. The magnetoresistive sensor comprises a flux concentrator and a magnetoresistive sensor unit. The magnetoresistive sensor unit is connected electrically into a push-pull structure. The push arm and pull arm of the magnetoresistive sensor are respectively located at two side positions equidistant from Y-axis central line and above or below the flux concentrator. The circular permanent magnet encoding disc has a magnetization direction parallel to the diameter direction. When the circular permanent encoding disc rotates, a magnetic field measurement angle is calculated via orthogonal magnetic fields measured by the two z-axis magnetoresistive se…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.