Magnetic position measuring device using a plurality of sensors and a scale
US5955882A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1996 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | May 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/142
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic position measuring device includes a sensor and a scale. At least one of the sensor and scale is movable in relation to the other. The sensor includes four sensor elements positioned along a longitudinal axis parallel to the direction of the movement. The scale is made of alternating and repeating first and second sections. The first sections have a first reluctance and the second sections have a second reluctance. The first sections each have a length "l" and the second sections each have a length "s". The Sensor includes a field plate and four sensor elements positioned on the field plate along the longitudinal axis. The four sensor elements include first and second outer sensor elements and first and second inner sensor elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.