Angle determinating method using encoder signal with noise suppression, adjusting method for output signal of encoder and absolute encoder
US10393499B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2017 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Nov 30, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0042
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining an angle by an encoder includes generating a first angle data based on a rotation of a bipolar magnet and a second angle data based on a rotation of the multipolar magnet; determining a first waveform signal based on the first angle data and a second waveform signal based on the second angle data; converting the first waveform signal into a third waveform signal having a cycle similar to the second waveform signal; calculating an angle result value as a function of the second angle data and a determined value about a location of a rotation cycle of the multipolar magnet based on a difference between the second waveform signal and the third waveform signal; and determining an absolute angle corresponding to the calculated angle result value based on stored angle data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.