Magnetic position sensor and position detecting method
US9995597B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2014 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | May 11, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/145
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention enables to obtain an approximate position of a zero crossing point in a shorter time period. A magnetic position sensor detects, with an array in which multiple magnetic detection elements are arranged in a straight line, the zero crossing point at which the magnetic flux density from a pair of magnetic poles is zero in a plane perpendicular to the longitudinal direction of the array. The magnetic detection elements are elements whose output changes in polarity when the direction of the magnetic flux density is inverted, and detect an approximate position of the zero crossing point by reading an output of every k-th magnetic detection element of the array (where k is an integer of 2 or greater). Then, the position of the zero crossing point is detected according to outputs of at least two magnetic detection elements on both sides of the zero crossing point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.