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Position detecting device and signal processing device and method thereof

A signal processing device and detection device technology, which is applied in the direction of measuring devices, using electric/magnetic devices to transmit sensing components, converting sensor outputs, etc., can solve the problem of difficult to obtain accurate position signal θ, and reduce circuit reliability and stability , anti-vibration and shock ability are not strong, etc., to improve the original signal quality, reduce the effective area, and facilitate the installation process

Inactive Publication Date: 2013-03-06
HANGZHOU SES MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are some insurmountable shortcomings in the photoelectric encoder: the photoelectric encoder is made of glass material through the engraved line, its anti-vibration and impact ability is not strong, it is not suitable for harsh environments such as dust and condensation, and its structure and positioning Complicated assembly; there is a limit to the distance between the engraved lines, and the code wheel must be enlarged to improve the resolution, making it difficult to miniaturize; high assembly accuracy must be ensured in production, which directly affects production efficiency and ultimately affects product cost
[0015] A-phase analog signal v obtained from the magnetic induction element a and B-phase analog signal v b , generally contain high-order harmonics and noise. Using the above-mentioned method of finding the arctangent value will be affected by high-order harmonics. If the influence of high-order harmonics cannot be reduced or eliminated, it is difficult to obtain an accurate position signal. θ;
[0016] Analog devices cause temperature drift and zero point drift, which reduces the reliability and stability of the circuit; the product cost of analog circuits is higher

Method used

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  • Position detecting device and signal processing device and method thereof
  • Position detecting device and signal processing device and method thereof
  • Position detecting device and signal processing device and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0081] Embodiment 1 of the present invention provides a position detection device in which the first column of magnetic induction elements is provided with two magnetic induction elements 308 and the second column of magnetic induction elements is provided with three magnetic induction elements 309 .

[0082] Figure 7 It is a structural diagram of the first magnetic steel ring, the magnetic permeable ring and the magnetic induction element in Embodiment 1 of the present invention; Figure 8 It is a diagram showing the magnetization sequence of the first magnetic steel ring and the positional relationship with the magnetic induction element in Embodiment 1 of the present invention. There are 2 magnetic induction elements 308 in the first column corresponding to the first magnetic steel ring 302, i.e. m=2, with H 1 and H 2 Indicates that the two magnetic sensing elements H 1 and H 2 They are respectively placed in the two gaps corresponding to the magnetic permeable ring 30...

Embodiment 2

[0102] Embodiment 2 of the present invention provides a schematic diagram of four magnetic induction elements corresponding to the first magnetic steel ring 302 .

[0103] Figure 12It is a structural schematic diagram of the first magnetic steel ring Hall element, the magnetic permeable ring, and the magnetic induction element in the position detection device of Embodiment 2 of the present invention; Figure 13 It is a diagram of the magnetization sequence of the first magnetic steel ring and the position relationship with the magnetic induction element in the second embodiment of the present invention.

[0104] Such as Figure 12 As shown, there are 4 magnetic induction elements 308 corresponding to the first column of the first magnetic steel ring 302, that is, m=4, and H 1 、H 2 、H 3 and H 4 Indicates that the two magnetic sensing elements H 1 、H 2 、H 3 and H 4 They are respectively placed in the four gaps corresponding to the first magnetic permeable ring 304 . T...

Embodiment 3

[0108] Embodiment 3 of the present invention provides a structural diagram in which three magnetic induction elements are provided corresponding to the first magnetic steel ring.

[0109] Figure 15 It is a structural schematic diagram of the first magnetic steel ring Hall element, the magnetic permeable ring, and the magnetic induction element of Embodiment 3 of the present invention; Figure 16 It is the magnetization magnetic sequence of the first magnetic steel ring and the position relationship diagram with the magnetic induction element in the embodiment 3 of the present invention;

[0110] Such as Figure 15 As shown, there are three magnetic induction elements 308 corresponding to the first magnetic steel ring 302 in the first column, that is, m=3, and H 1 、H 2 and H 3 Indicates that the two magnetic sensing elements H 1 、H 2 and H 3 They are respectively placed in the three gaps corresponding to the first magnetic permeable ring 304 . The second row of magneti...

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Abstract

A position detection device comprises a rotor and a stator (306) which wraps the rotor inside. The rotor includes a first magnetic steel ring (302) and a second magnetic steel ring (303) which are fixed on a rotary shaft (301). The first magnetic steel ring (302) is magnetized uniformly into N pairs of magnetic poles, with polarities of adjacent two poles opposite. The total number of magnetic poles of the second magnetic steel ring (303) is N. The stator (306) is provided with m angular-distributed magnetic induction elements corresponding to the first magnetic steel ring (302) and n angular-distributed magnetic induction elements corresponding to the second magnetic steel ring (303). A signal processing device and a signal processing method are also provided.

Description

technical field [0001] The invention relates to a position detection device and its signal processing device and method, in particular to a position detection device for precise position control of a motor and its signal processing device and method. Background technique [0002] The position detection device used in the field of motor control is mainly an encoder. The encoder is a position sensor that converts physical quantities such as the rotational angular position and angular velocity of the motor into electrical signals. The manufacture and signal processing level of the encoder directly affect level of automation. [0003] At present, photoelectric encoders are mainly used in the field of engineering technology, and there are two types: incremental and absolute. When the shaft of the incremental encoder rotates, it drives the grating disk to rotate. The light emitted by the light-emitting element is cut into intermittent light by the slit of the grating disk and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/12G01D5/245
CPCG01D5/2451G01D5/145
Inventor 郝双晖郝明晖
Owner HANGZHOU SES MACHINERY
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