Magnetic position detecting apparatus

A detection device and relative configuration technology, applied in the direction of measuring device, using electrical device, using electromagnetic/magnetic device to transmit sensing components, etc., can solve the problems of reduced output waveform resolution, low output waveform resolution, and reduced magnetic field strength. , to achieve the effect of reducing the spacing error, reducing the area, and reducing the difference between the magnetic field strengths
CN1821710AActive Publication Date: 2006-08-23NEW SHICOH MOTOR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NEW SHICOH MOTOR CO LTD
Publication Date
2006-08-23

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Abstract

In a position detecting apparatus 1 of the present invention, magnetic resistance circuits A and B of a first main circuit 10 include a reference magnetic resistance element +A, an even harmonic correction magnetic resistance element +A 3, being placed at a position shifted by (1 / 4)lambda or (3 / 4)lambda from the reference magnetic resistance element +A, with respect to a reference wave, and a third harmonic correction magnetic resistance element +A 2, being placed at a position shifted by (1 / 6)lambda from the reference magnetic resistance element, with respect to a reference wave, and magnetic resistance circuits A' and B' of a second main circuit 20 include the magnetic resistance circuit of the second main circuit 20 includes a reference magnetic resistance element +A' 1, a fifth harmonic correction magnetic resistance element +A' 2, being placed at a position shifted by (1 / 10)lambda from the adjacent magnetic resistance element, with respect to a reference wave and a fifth harmonic correction magnetic resistance element +A' 2, being placed at a position shifted by (4 / 15)lambda from the reference magnetic resistance element +A' 1, with respect to a third harmonic wave.
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Description

technical field

[0001] The present invention relates to a position detection device that detects the position of a driven body that moves linearly or rotates, and particularly relates to a position detection device that utilizes magnetism. Background technique

[0002] As such a position detection device, Patent Document 1 discloses a structure in which one and the other magnetoresistive circuits formed by connecting a plurality of magnetoresistive elements in series are formed into comb teeth, and one and the other magnetoresistive circuits are formed The resistance circuits are arranged laterally side by side along the magnetic pole arrangement direction.

[0003] Patent Document 2 also discloses a technique of forming a groove on the magnetized surface to adjust the output waveform of the reluctance circuit from the reference position.

[0004] [Patent Document 1] Japanese Patent Publication No. 54-41335

[0005] [Patent Document 2] JP-A-7-4987

[0006] However, in the...

Claims

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