Magnetoresistive sensor for high precision measurements of lengths and angles
First Claim
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1. A sensor intended to be moved with respect to a magnetized scale with a period λ
- for measuring linear or angular dimensions, said sensor comprising;
magnetoresistive electrodes connected to form n measuring bridges, each said measuring bridge being formed by four branches of magnetoresistive electrodes, the magnetoresistive electrodes making up each branch of said bridge being connected in series, the magnetoresistive electrodes being distributed longitudinally so as to constitute x groups, each said group being made up of y consecutive magnetoresistive electrodes coming from maximally two of said branches of a same said measuring bridge, wherein the number of magnetoresistive electrodes per group is greater than eight.
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Abstract
A sensor for measuring linear or angular dimension. The sensor can be moved with respect to a magnetized scale with a period λ. It is equipped with magnetoresistive electrodes provided with barber-pole structures and connected so as to form n measuring bridges, each measuring bridge formed by four sets of magnetoresistive electrodes.
The magnetoresistive electrodes making up each set are connected in series, the magnetoresistive electrodes being distributed spatially so as to constitute x groups. Each group being formed by more than eight consecutive magnetoresistive electrodes coming from two sets of a same measuring bridge.
16 Citations
20 Claims
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1. A sensor intended to be moved with respect to a magnetized scale with a period λ
- for measuring linear or angular dimensions, said sensor comprising;
magnetoresistive electrodes connected to form n measuring bridges, each said measuring bridge being formed by four branches of magnetoresistive electrodes, the magnetoresistive electrodes making up each branch of said bridge being connected in series, the magnetoresistive electrodes being distributed longitudinally so as to constitute x groups, each said group being made up of y consecutive magnetoresistive electrodes coming from maximally two of said branches of a same said measuring bridge, wherein the number of magnetoresistive electrodes per group is greater than eight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- for measuring linear or angular dimensions, said sensor comprising;
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16. A device for measuring dimension comprising a magnetized scale with a period of magnetization λ
- and a sensor moving with respect to said scale, said sensor having magnetoresistive electrodes connected to form n measuring bridges, each said measuring bridge being formed by four branches of magnetoresistive electrodes, the magnetoresistive electrodes making up each branch of said bridge being connected in series, the magnetoresistive electrodes being distributed longitudinally so as to constitute x groups each made up of y consecutive magnetoresistive electrodes coming from maximally two branches of a same measuring bridge, wherein the number of magnetoresistive electrodes per group is greater than eight.
- View Dependent Claims (17, 18)
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19. A sensor for measuring linear or angular dimensions, said sensor comprising:
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a plurality of measuring bridges for making high precision measurements;
a plurality of magnetoresistive electrodes for forming said plurality of measuring bridges and providing resistance;
at least four branches of said plurality of measuring bridges, each said branch arranging said plurality of magnetoresistive electrodes in series connection for increasing resistance; and
a plurality of groups, each said plurality of groups having some of said plurality of magnetoresistive electrodes from two of said at least four branches of said plurality of measuring bridges. - View Dependent Claims (20)
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Specification