Magnetic rotational position sensor
US6509734B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 2000 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Nov 14, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic rotational position sensor senses each rotational position of a control shaft about a first rotational axis over a definable range of rotation of the control shaft. The magnetic rotational position sensor includes a magnetic circuit, a magnetic flux sensor, a drive circuit, and an output signal amplifier. The magnetic circuit encloses an equally balanced magnetic field, and is adjoined to the control shaft to synchronously rotate the magnetic field about a second rotational axis. The magnetic flux sensor is disposed within the magnetic field to sense each rotational position of the control shaft as the control shaft is rotated about the first rotational axis over the definable range of rotation. The drive circuit is operable to generate a constant current drive signal and a constant voltage drive signal. In response to a generated constant current drive signal and a generated constant voltage drive signal, the magnetic flux sensor generates two voltage sensing signals representative of a sensing of each rotational position of the control shaft about the first rotational axis over the definable range of rotation. In response to a generation of the voltage sensing signals,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.