Rotational angle detecting apparatus and torque detecting apparatus
US6957590B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2004 |
| Grant date | Oct 25, 2005 |
| Priority date | — |
| Expiry date | Feb 26, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L3/104
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A calculation processing circuit 10 executes a predetermined operation on the detection signals of a plurality of magnetic sensors A and B, disposed to face a target 3a made of a magnetic material and provided on a rotating member 6, for outputting detection signals with mutually different phases according to a rotation of the rotating member 6, calculates the electrical angle of the detection signals based on a table 2a representing the correlation of the result of the operation executed in advance with a corresponding electrical angle of detection signals, and detects the rotational angle of the rotating member 6 based on the calculated electrical angle. The calculation processing circuit 10 stores a plurality of tables 2a through 2c for different gaps between the target 3a and the magnetic sensors A and B, determines the gap based on the detection signals of the magnetic sensors A and B, and calculates the electrical angle of the detection signals based on the table corresponding to the determined gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.