Measuring apparatus for measuring magnetic properties, and method for producing such a measuring apparatus
AssigneeMeas Deutschland GmbH
InventorsArmin Meisenberg, Axel Bartos
Life of this patent
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Abstract
Measuring apparatus for measuring magnetic properties of the area surrounding the measuring apparatus with a sensor row comprising at least two magnetoresistive sensor elements, which are arranged in a row that extends in a row direction, and a supporting field apparatus with generates a magnetic supporting field having a magnetic field component which points in the row direction and the field strength of which varies in the row direction, wherein this field strength profile in the row direction does not have a zero crossing and/or a maximum or minimum on at least two sensor edges of the sensor elements which for the sensor row, which sensor edges are arranged after one another in the row direction.
Claims23
Measuring apparatus for measuring magnetic properties of the area surrounding the measuring apparatus with a sensor row comprising:
- at least two magnetoresistive sensor elements arranged in a row extending in a row direction, and
- a supporting field apparatus, which generates a magnetic supporting field, which has a magnetic field component pointing in the row direction and a field strength which varies in the row direction,
- wherein the supporting field apparatus is arranged relative to the at least two sensor elements such that the field strength defines a profile having one or more zero crossings, one or more maxima and one or more minima and wherein all of said one or more zero crossings, all of said one or more maxima and all of said one or more minima are located at positions along the row direction that do not correspond to a location of any one of said at least two sensor elements.
Method of assembling a measuring apparatus, comprising the steps of:
- arranging at least two magnetoresistive sensor elements in a row defining a row direction;
- providing a supporting field apparatus, wherein the supporting field apparatus generates a magnetic supporting field having a magnetic field along the row direction and the magnetic field having a varying field strength along the row direction, the magnetic field having a profile including one or more zero-crossings, one or more maxima and one or more minima;
- and
- arranging the supporting field apparatus and the at least two magnetoresistive elements such that all of said one or more zero crossings, all of said one or more maxima and all of said one or more minima of the magnetic field profile are located at positions along the row direction that do not correspond to a location of any one of said at least two magnetoresistive sensor elements.
A measuring apparatus for measuring magnetic properties comprising:
- at least two magnetoresistive sensor elements arranged in a row extending in a row direction, and
- at least one row of magnets, arranged parallel to the row direction and arranged relative to the at least two magnetoresistive sensor elements to generate a magnetic supporting field, the magnetic supporting field having a magnetic field component in the row direction and a magnetic field strength varying in the row direction,
- wherein the magnetic field strength in the row direction defines a profile having one or more zero crossings, one or more maxima and one or more minima and wherein all of said one or more zero crossings, all of said one or more maxima and all of said one or more minima are located at positions along the row direction that do not correspond to a location of any one of the at least two sensor elements.
Dependencies are inferred from the claim text.