Patent · US Active

Arrangement and method for magnetic determination of a linear length or a rotary angle

US8415946B2 · kind B2 · utility

4Cited by

2References

29Claims

0Family size

Assignee

MEAS Deutschland GmbH · DE

Inventors

Axel Bartos · Waltrop, DE
Fritz Dettmann · Solms, DE
Armin Meisenberg · Dortmund, DE

Key dates

Filing date	Feb 21, 2008
Grant date	Apr 9, 2013
Priority date	—
Expiry date	Feb 21, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG01D5/12
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Disclosed are absolute measuring systems comprising measuring rods that are composed of groups of at least two magnetic segments. The magnetic segments of at least one group have the same length in the direction of measurement while the magnetic segments of the different groups have different lengths. For arrangements encompassing more than two sensors on the single-track measuring rods, multistage phase difference processes are disclosed which result in high resolutions and accurate measurements while allowing for great measured lengths and, when anisotropic magnetoresistive sensors are used, for example, an unambiguous angle measurement range of 360°. FIG. 6a best represents the essence of the invention.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.