Angular transducer and angular transducer system

An angle sensor and angle technology, which is applied in the direction of transmitting sensing components using electric/magnetic devices, can solve problems such as large constraints in structure or setting, and achieve the effect of reducing angle errors

Active Publication Date: 2018-06-29
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in this rotating magnetic field sensor, there is a technical p

Method used

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  • Angular transducer and angular transducer system
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  • Angular transducer and angular transducer system

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no. 1 Embodiment approach

[0044] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, refer to figure 1 , the schematic configuration of the angle sensor system according to the first embodiment of the present invention will be described. The angle sensor system 100 according to the present embodiment includes the angle sensor 1 and the magnetic field generating unit 5 according to the present embodiment. Angle sensor 1 is in particular a magnetic angle sensor. The magnetic field generator 5 generates a magnetic field to be detected by the angle sensor 1 . Hereinafter, the magnetic field to be detected by the angle sensor 1 is referred to as the target magnetic field.

[0045] The magnetic field generator 5 in this embodiment is a columnar magnet 6 . The magnet 6 has N poles and S poles arranged symmetrically about an imaginary plane including the central axis of the cylinder as a center. The magnet 6 rotates around the center axis of...

no. 2 Embodiment approach

[0156] Next, a second embodiment of the present invention will be described. First, refer to Figure 9 , the configuration of the angle sensor system 100 according to this embodiment will be described. The angle sensor system 100 according to this embodiment differs from the first embodiment in the following points. Such as Figure 9 As shown, in the present embodiment, the first to fourth detection positions P1 to P4 are located on the same plane parallel to one end face of the magnet 6 . Hereinafter, a virtual plane including the first to fourth detection positions P1 to P4 is referred to as a reference plane P. As shown in FIG. In this embodiment, in particular, the first to fourth detection positions P1 to P4 are defined so that the distances from the magnetic field generating unit 5 are equal to each other. 1st to 4th detection positions P1 to P4 such as Figure 9 The illustration is on the reference plane P, but it may be on the circumference of a circle with the ro...

no. 3 Embodiment approach

[0171] Next, a third embodiment of the present invention will be described. First, refer to Figure 11 , the configuration of the angle sensor 1 according to the present embodiment will be described. The configuration of the angle sensor 1 according to this embodiment differs from the first and second embodiments in the following points. In this embodiment, the first to fourth vector generation units 15, 25, 35, and 45 in the first and second embodiments are not provided. The angle sensor 1 according to the present embodiment includes an angle calculation unit 250 instead of the angle calculation unit 50 in the first and second embodiments. The angle computing unit 250 can be realized by, for example, an ASIC or a microcomputer.

[0172] In this embodiment, as in the first and second embodiments, the vector Y1 represents the first composite magnetic field information, the vector Y2 represents the second composite magnetic field information, and the vector Y3 represents the ...

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Abstract

The invention relates to an angular transducer and angular transducer system. The angular sensor has a plurality of synthetic magnetic field information generation unit and an angle operation unit. The plurality of synthetic magnetic field information generation units detect a synthetic magnetic field of a detection object magnetic field and a noise magnetic field apart from the detection object magnetic field in a plurality of mutually different detection positions and generate a plurality of pieces of synthetic magnetic field information containing information of at least direction in direction and intensity of the synthetic field. In each of the plurality of detection positions, the direction of the detection object magnetic field changes corresponding to the angle of the detection object. The angle operation unit generates an angle detection value according to the plurality of pieces of synthetic magnetic field information by using a least square method.

Description

technical field [0001] The present invention relates to an angle sensor and an angle sensor system that generate an angle detection value corresponding to an angle of a detection object. Background technique [0002] In recent years, angle sensors that generate angle detection values ​​corresponding to angles to be detected have been widely used in various applications such as detection of the rotational position of a steering wheel or a power steering motor in an automobile. Examples of angle sensors include magnetic angle sensors. In an angle sensor system in which a magnetic angle sensor is used, a magnetic field generator for detecting a magnetic field of an object whose direction is rotated in conjunction with rotation or linear motion of an object is generally provided. The magnetic field generator is, for example, a magnet. The angle of the detection object in the magnetic angle sensor has a corresponding relationship with the angle formed by the direction of the ma...

Claims

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Application Information

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IPC IPC(8): G01D5/12
CPCG01D5/12
Inventor 穴川贤吉望月慎一郎平林启渡部司也
Owner TDK CORPARATION
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