CN109000554A - Absolute type magnetoelectricity angular displacement sensor implementation method based on asymmetric field structure - Google Patents
Absolute type magnetoelectricity angular displacement sensor implementation method based on asymmetric field structure Download PDFInfo
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- CN109000554A CN109000554A CN201810614010.2A CN201810614010A CN109000554A CN 109000554 A CN109000554 A CN 109000554A CN 201810614010 A CN201810614010 A CN 201810614010A CN 109000554 A CN109000554 A CN 109000554A
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- angular displacement
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- displacement sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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Abstract
The absolute type magnetoelectricity angular displacement sensor implementation method based on asymmetric field structure that the present invention relates to a kind of, it is mounted with that quantity is not less than 2 magneto-dependent sensors in stator side, to guarantee uniqueness of the magneto-dependent sensor combination output at one week, in rotor radial or the axially mounted single magnet ring formed by the n of several pole spans not etc. to pole magnetic pole, magnetic pole in magnet ring alternately magnetizes according to N-S-N-S, and the combination output signal by calculating magneto-dependent sensor obtains angular displacement.The present invention real-time measurement and can obtain the angular displacements of the rotations such as machine shaft.
Description
Technical field
The present invention relates to rotor rotational angle displacement the field of test technology, are based on asymmetric field structure more particularly to one kind
Absolute type magnetoelectricity angular displacement sensor implementation method.
Background technique
It is divided into three categories currently, the sensor technology for being used for the measurement of the rotational angle displacements such as motor in the market is most mature:
Opto-electronic transformers, rotary transformer and magnetism encoder.
Photoelectric encoder is most widely used in current industrial production, accounts for about the 90% of the entire encoder market share
Left and right, technology maturation, resolving power and measurement accuracy is higher, measurement range is wide.Although advantage is more, photoelectricity using extensively
The shortcomings that encoder also has its own.It is primarily due to the material property of grating, determines that photoelectric encoder can not be in certain conditions
It is worked (such as in space flight military project) under harsh environment, when the impact very big by the external world, code-disc is frangible, therefore photoelectric encoder exists
Requirement is proposed to system acceleration and environmental vibration when use.Secondly higher cost, grating processing technology is complicated, to dress
Match, positioning accuracy request is high, and the service life of sensor devices is limited, in order to manufacture the photoelectric coding of higher resolution and precision
Device, cost are even more to be significantly increased.
Rotary transformer is also due to use the Design of Mechanical Structure of similar motor, especially magnetoresistance transformer, knot
Structure is more complicated, increases the cost and difficulty of processing and assembly, and volume is larger while improving precision passes through induced voltage
The solution process operand that signal carries out angle is big (control of similar motor resolves), can elongate the time of execution cycle, cause
Response speed is lower.Therefore required strictly to size, response speed and the higher occasion of control accuracy requirement, rotary transformer is simultaneously
It is not applicable.
The working principle of magnetism encoder is based on magnetoelectric transducer, and magnetoelectric transducer is mainly based upon magnetoresistance and magnetic
Quick effect designs, therefore magnetism encoder is divided into reluctance type and two kinds of magneto sensor.By reluctance type magnetism encoder itself
Feature it is found that improve encoder resolution ratio, then must increase the number of magnetic poles of magnetic drum, this will increase the body of encoder
Product increases the difficulty of processing of magnetic drum, improves cost, it is more difficult to realize the miniaturization and high-resolution of encoder.
Summary of the invention
The absolute type magnetoelectricity angle that technical problem to be solved by the invention is to provide a kind of based on asymmetric field structure
Displacement sensor implementation method real-time measurement and can obtain the angular displacements of the rotations such as machine shaft.
The technical solution adopted by the present invention to solve the technical problems is: providing a kind of based on the exhausted of asymmetric field structure
To formula magnetoelectricity angular displacement sensor implementation method, rotor radial or it is axially mounted by several pole spans n not etc. to pole magnetic pole
The single magnet ring formed, the magnetic pole in magnet ring alternately magnetize according to N-S-N-S, are equipped with quantity not less than 2 in stator side
Magneto-dependent sensor, by calculate magneto-dependent sensor output signal obtain angular displacement.
Rotor radial or axial direction are provided with two pairs of magnetic poles of several not equal pole spans.
It in rotor radial or is axially provided with several two pairs of magnetic poles for not waiting pole spans and constitutes a magnet rings.
Beneficial effect
Due to the adoption of the above technical solution, compared with prior art, the present invention having the following advantages that and actively imitating
Fruit: the angular displacement sensor for the increment type form that can only be used when the present invention changes multipair pole formula single track also breaches multipair
Pole formula installs the structure type of two-orbit, both meet to obtain the absolute position of rotor, without the small change that is switched on, it is excellent without cumulative errors etc.
Point, but using monorail magnet ring save material, eliminate between track high-precision assembly and chuck problem.
Detailed description of the invention
Magnet ring magnetizes plan view when Fig. 1 is two pairs of magnetic poles；
Fig. 2 is that two pairs of magnetic pole pole spans do not magnetize plan view simultaneously.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
It is real that embodiments of the present invention are related to a kind of absolute type magnetoelectricity angular displacement sensor based on asymmetric field structure
Existing method, is equipped with m (m >=2) a magneto-dependent sensor in stator side, for guarantee m magneto-dependent sensor combination export (y1,
Y2 ..., ym) in one week uniqueness, in rotor radial or axially mounted by the n of several pole spans not etc. pole magnetic pole is formed
Single magnet ring, the magnetic pole in magnet ring alternately magnetize according to N-S-N-S, and the combination output signal by calculating magneto-dependent sensor obtains
Angular displacement.
Due to rotor radial or it is axially mounted by several pole spans n not etc. to pole magnetic pole, when rotor rotates, m magnetic
Dependent sensor combination output (y1, y2 ..., ym) has uniqueness, and which achieves the angular displacement sensors of absolute type, thus may be used
See, present embodiment can realize the angle acquisition of absolute type only with one code-disc of single track.And collected electrical angle
Signal can correspond actual mechanical angle again.Divide using multipair magnetic pole type designing and can improve its angular displacement survey
The resolution ratio of amount.Several pole spans are arranged in the present invention, and equal n can not obtain the uniqueness of its angle to pole magnetic pole.
Absolute type angular displacement sensor finds reference point and booting small change relative to increment type angular displacement sensor, without having
Process, be widely applied in accurate angle measurement and transmission control；Magneto-electric angular displacement sensor is relative to photo-electric angle
Displacement sensor, without complicated grating manufacturing process and high reliablity, strong antijamming capability；Relative to single pair pole magnetoelectric angle
Displacement sensor is based on contact transformation algorithm of subdivision anyway to be influenced by higher hamonic wave, its resolution ratio of multipair magnetic pole type and precision are significantly
It is promoted；Monorail angular displacement sensor obtains machine relative to two-orbit angular displacement sensor, without considering in high precision between two tracks
Tool assembly and chuck problem.
As shown in Figure 1, forming magnet ring using two pairs of magnetic poles realizes present embodiment.Circumference is divided into 4 pole spans to differ
Region, and to this 4 magnetic poles in magnet ring uniformly alternately magnetize, the magnet ring of such two pairs of pole can use.Magneto-dependent sensor
Use different number can be used, can be specifically designed according to different situations.Such as it is sensed using two pairs of magnetic poles, 2 magnetosensitives
Magneto-dependent sensor, is mounted on the stator apparatus side for being separated by certain air gap, the outer circumference of magnet ring is corresponded on stator by device acquisition
Position.Specifically position in each area can be determined according to the quantity and different magnet steel area sizes of magneto-dependent sensor.For
Ensure that the accuracy of signal acquisition, horizontal distance of the magneto-dependent sensor apart from magnet ring need identical.Overall structure is just realized in this way
Installation.
As shown in Fig. 2, not realizing present embodiment simultaneously using two teams' magnetic pole pole span.Select 4 materials, sizes identical
Adjacent magnet steel different distance is installed and is uniformly alternately magnetized by patch type magnet steel, forms the structure that two pairs of pole pole spans do not wait.Magnetic
Different number can be used in the use of dependent sensor, can be specifically designed according to different situations.Such as using two pairs of magnetic poles with 2
Magneto-dependent sensor, is mounted on the stator apparatus side for being separated by certain air gap, corresponds to magnet ring on stator by magneto-dependent sensor acquisition
Outer circumference position.Specifically position in each area can be according to the quantity and different magnet steel area sizes of magneto-dependent sensor
It determines.For the accuracy for ensuring signal acquisition, horizontal distance of the magneto-dependent sensor apart from magnet ring needs identical.It just realizes so total
The installation of body structure.
When the motor rotates, rotor drives magnet ring to rotate with it, and the magneto-dependent sensor on stator can pass through surrounding
Changes of magnetic field acquires signal.At this moment it needs to table look-up to the signal of acquisition.The table produces the electrical angle for being applied to acquire out
Signal is corresponded in the mechanical angle of actual rotation.It can determine that motor turns by the uniqueness of angle between each magnetic pole at this time
Its angle accordingly rotated is calculated in dynamic absolute position.
It is not difficult to find that the method that the present invention determines unique angle by designing adjacent pole difference, can be not necessarily to double track
In the case where road, the angle of real-time measurement its absolute position and rotation is realized.Meanwhile this method is applied equally to multipair magnetic pole
Magnet ring state under measurement to its absolute position and angle can be designed multipair magnetic pole high score in conjunction with the requirement to resolution ratio
The absolute type magnetoelectricity angular displacement sensor of resolution.
Claims (3)
1. a kind of absolute type magnetoelectricity angular displacement sensor implementation method based on asymmetric field structure, which is characterized in that turning
Son is axially or radially mounted with the single magnet ring that the n not waited by several pole spans forms pole magnetic pole, and the magnetic pole in magnet ring is according to N-
S-N-S alternately magnetizes, and the magneto-dependent sensor that quantity is not less than 2 is equipped in stator side, by calculating magneto-dependent sensor
Output signal obtains angular displacement.
2. the absolute type magnetoelectricity angular displacement sensor implementation method according to claim 1 based on asymmetric field structure,
It is characterized in that, being provided with two pairs of magnetic poles of several not equal pole spans in rotor radial or axial direction.
3. the absolute type magnetoelectricity angular displacement sensor implementation method according to claim 1 based on asymmetric field structure,
It is characterized in that, constituting a magnet rings in two pairs of magnetic poles that rotor radial or axial direction are provided with several not equal pole spans.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614010.2A CN109000554A (en) | 2018-06-14 | 2018-06-14 | Absolute type magnetoelectricity angular displacement sensor implementation method based on asymmetric field structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614010.2A CN109000554A (en) | 2018-06-14 | 2018-06-14 | Absolute type magnetoelectricity angular displacement sensor implementation method based on asymmetric field structure |
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| CN109000554A true CN109000554A (en) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810614010.2A Pending CN109000554A (en) | 2018-06-14 | 2018-06-14 | Absolute type magnetoelectricity angular displacement sensor implementation method based on asymmetric field structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362089A (en) * | 2020-10-30 | 2021-02-12 | 哈尔滨理工大学 | Multi-pair-pole magnetoelectric encoder and high-resolution and high-reliability angle resolving method thereof |
| CN112361945A (en) * | 2020-10-30 | 2021-02-12 | 哈尔滨理工大学 | Magnetoelectric encoder for detecting axial movement of motor spindle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63101707A (en) * | 1986-10-20 | 1988-05-06 | Honda Motor Co Ltd | Crank angle sensor |
| DE19757116C2 (en) * | 1997-12-20 | 2001-02-22 | Daimler Chrysler Ag | Magnetic scale arrangement |
| US6404185B1 (en) * | 1999-06-01 | 2002-06-11 | Cts Corporation | Apparatus and method for sensing an angular position of a flux linkage member |
| CN101743456A (en) * | 2007-02-21 | 2010-06-16 | 米斯德国有限公司 | Arrangement and method for the absolute determination of the linear position or the rotational position expressed as an angle |
| CN102744724A (en) * | 2011-04-18 | 2012-10-24 | 库卡罗伯特有限公司 | Machine with relative rotatable members |
| CN203163676U (en) * | 2012-12-26 | 2013-08-28 | 万向钱潮（上海）汽车系统有限公司 | Coding magnetic resistance combination type electronic stability program (ESP) absolute type multi-loop angle sensor |
| CN104169685A (en) * | 2011-12-28 | 2014-11-26 | 伺服圣斯有限公司 | High resolution absolute encoder |
-
2018
- 2018-06-14 CN CN201810614010.2A patent/CN109000554A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63101707A (en) * | 1986-10-20 | 1988-05-06 | Honda Motor Co Ltd | Crank angle sensor |
| DE19757116C2 (en) * | 1997-12-20 | 2001-02-22 | Daimler Chrysler Ag | Magnetic scale arrangement |
| US6404185B1 (en) * | 1999-06-01 | 2002-06-11 | Cts Corporation | Apparatus and method for sensing an angular position of a flux linkage member |
| CN101743456A (en) * | 2007-02-21 | 2010-06-16 | 米斯德国有限公司 | Arrangement and method for the absolute determination of the linear position or the rotational position expressed as an angle |
| CN102744724A (en) * | 2011-04-18 | 2012-10-24 | 库卡罗伯特有限公司 | Machine with relative rotatable members |
| CN104169685A (en) * | 2011-12-28 | 2014-11-26 | 伺服圣斯有限公司 | High resolution absolute encoder |
| CN203163676U (en) * | 2012-12-26 | 2013-08-28 | 万向钱潮（上海）汽车系统有限公司 | Coding magnetic resistance combination type electronic stability program (ESP) absolute type multi-loop angle sensor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362089A (en) * | 2020-10-30 | 2021-02-12 | 哈尔滨理工大学 | Multi-pair-pole magnetoelectric encoder and high-resolution and high-reliability angle resolving method thereof |
| CN112361945A (en) * | 2020-10-30 | 2021-02-12 | 哈尔滨理工大学 | Magnetoelectric encoder for detecting axial movement of motor spindle |
| CN112362089B (en) * | 2020-10-30 | 2022-05-27 | 哈尔滨理工大学 | Multi-pair-pole magnetoelectric encoder and high-resolution and high-reliability angle resolving method thereof |
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