CN205808430U - A kind of magnetic coder and magnetic conduction code-disc thereof - Google Patents
A kind of magnetic coder and magnetic conduction code-disc thereof Download PDFInfo
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- CN205808430U CN205808430U CN201620520999.7U CN201620520999U CN205808430U CN 205808430 U CN205808430 U CN 205808430U CN 201620520999 U CN201620520999 U CN 201620520999U CN 205808430 U CN205808430 U CN 205808430U
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Abstract
This utility model discloses a kind of magnetic coder and magnetic conduction code-disc thereof and the preparation method of this magnetic conduction code-disc, this magnetic coder has the magnetic-conductance portion of perturbation action by arranging the magnetic field producing permanent magnet on magnetic conduction code-disc, magnetic conduction code-disc is easily worked, do not limited by magnetic pole logarithm, less to magnetic-conductance portion and the interval in non-magnetic district, number quantitative limitation, make magnetic coder structure the compactest in the case of having taken into account accuracy of detection.A kind of magnetic coder, including the permanent magnet for fixing connection with electric machine casing, for fixing the magnetic conduction code-disc of connection with the output shaft of motor, described magnetic conduction code-disc has at least one circle magnetic grid, described magnetic grid is made up of the magnetic-conductance portion forming disturbance for the magnetic field that produces described permanent magnet and the non-magnetic district that connects with described magnetic-conductance portion, and described magnetic-conductance portion is made up of permeability magnetic material；This magnetic coder also includes that signal processor, described signal processor include the sensor for detecting changes of magnetic field being arranged between described permanent magnet and described magnetic conduction code-disc.
Description
Technical field
This utility model relates to magnetic coder field, particularly to a kind of magnetic coder, the magnetic conduction code-disc of magnetic coder.
Background technology
According to Cleaning Principle, encoder is broadly divided into photoelectric encoder and magnetic coder.General photoelectric encoder is main
It is made up of photoelectric code disk and the Electro-Optical Sensor Set of axle a center, photoelectric code disk has logical, the dark groove of annular,
In servosystem, due to photoelectric code disk and motor coaxle, when motor rotates, grating disc and the synchronized rotation of motor, through light-emitting diodes
The detection device detection of the composition such as pipe exports some pulse signals, just can reflect the rotating speed of current motor by analyzing pulse signal
Or the angle that turns over and turning to.The material of traditional photoelectric encoder code-disc have glass, metal, plastics, glass code-disc be
The groove that deposition on glass is the thinnest, its heat stability and precision can reach common standard, general requirement, but fragile.Metal
Code-disc is directly with logical and obstructed groove, non-friable, but owing to metal has certain thickness, precision is the most restricted, its heat stability
Will an order of magnitude poorer than glass code-disc.Plastics code-disc is Eco-power, its low cost, and precision and the high temperature resistant height that do not reaches are wanted
Ask.
And magneto-electric encoder uses magneto-electric design, by magnetic induction device, the change in magnetic field is utilized to produce and carry
For the absolute position of rotor, utilize magnetic device to instead of traditional code-disc, compensate for photoelectric encoder same generation light pollution,
The defect that life-span is relatively short, more antidetonation, corrosion-resistant, anti-pollution, dependable performance are high, structure is simpler, are that encoder will be sent out future
The new direction of exhibition.In prior art, encoder uses the principle of IC cutting magnetic field to calculate angle, produces string ripple signal, lacks
Point be all angle-datas be to simulate relative angles and positions by software, precision is the highest, and error is big.
Seeing a kind of magnetic coder as disclosed in Chinese patent CN101846531A, its shell is fixed on motor, magnetic grid
Being enclosed within above the armature spindle of motor, signal processor is arranged on housings, and magnetic grid includes magnet steel and magnetic track, the axial end of magnet steel
Face is provided with cannelure, and cannelure assembling magnet forms magnetic track, and magnetic track produces annular magnetic field, and the locking of signal processor is opened
The magnetic track rotated with motor output shaft is detected by pass type Hall, obtains signal of telecommunication output waveform.Biography however as described above
System magnetic coder is limited due to magnetic pole logarithm, thus resolution is the highest；If increasing magnetic pole logarithm, Magnet design and the difficulty of processing
And the volume of Magnet all can greatly increase.
Utility model content
For solving the problems referred to above, the purpose of this utility model is to provide a kind of magnetic coder and magnetic conduction code-disc, this magnetic
Encoder has the magnetic-conductance portion of perturbation action by arranging the magnetic field producing permanent magnet on magnetic conduction code-disc, and magnetic conduction code-disc is easy
Processing, is not limited by magnetic pole logarithm, less to magnetic-conductance portion and the interval in non-magnetic district, number quantitative limitation, is taking into account detection
Make magnetic coder structure the compactest in the case of precision.
In order to reach object above, this utility model adopts the following technical scheme that
A kind of magnetic coder, including the permanent magnet for fixing connection with electric machine casing, for the output shaft with motor admittedly
The fixed magnetic conduction code-disc connected, described magnetic conduction code-disc has at least one circle magnetic grid, and described magnetic grid is by for producing described permanent magnet
Magnetic field form the magnetic-conductance portion of disturbance and the non-magnetic district composition connected with described magnetic-conductance portion, described magnetic-conductance portion is by permeability magnetic material system
Become；
This magnetic coder also includes that signal processor, described signal processor include being arranged at described permanent magnet and described lead
The sensor for detecting changes of magnetic field between magnetic code dish.
Preferably, described magnetic conduction code-disc is made up of permeability magnetic material, described magnetic conduction code-disc is offered porose, and described hole constitutes institute
State non-magnetic district；
Or, described magnetic conduction code-disc is made up of non-magnet material, described magnetic conduction code-disc is fixedly installed permeability magnetic material and constitutes
Described magnetic-conductance portion.
Preferably, described magnetic conduction code-disc has outer ring magnetic grid, and described outer ring magnetic grid is by multiple magnetic-conductance portion and multiple non-magnetic
District forms, and is provided with a described non-magnetic district between adjacent two described magnetic-conductance portion.
It is highly preferred that described magnetic conduction code-disc is disc-shaped, multiple described non-magnetic districts are spacedly distributed along the circumference of disk,
Described non-magnetic district is in fan annular.
It is highly preferred that described sensor includes multipair InSb magnetoresistive element, each described InSb magnetoresistive element is mutually electrically connected,
And one of them InSb magnetoresistive element just to another InSb magnetoresistive element during a certain non-magnetic district just to a certain magnetic-conductance portion or its
In InSb magnetoresistive element just to another InSb magnetoresistive element during a certain non-magnetic district just to another non-magnetic district.
Further, the width of the width≤magnetic-conductance portion in the width of InSb magnetoresistive element≤non-magnetic district.
It is highly preferred that described magnetic conduction code-disc also has the inner ring magnetic grid for detecting zero-bit, described inner ring magnetic grid is by one
Magnetic-conductance portion and a non-magnetic district composition, described sensor includes the Hall element for detecting zero-bit, described Hall element pair
Should arrange by described inner ring magnetic grid.
Preferably, described sensor is arranged between described permanent magnet and described magnetic conduction code-disc
A kind of magnetic conduction code-disc as above.
The permeability magnetic material addressed in this utility model is defined as follows: the magnetic field shape that permanent magnet can be produced by permeability magnetic material
Becoming disturbance, as strengthened the magnetic field in magnetic circuit, permeability magnetic material includes soft magnetic material and retentive material (also known as permanent magnet material).Soft
Magnetic material be mainly characterized by that permeability is high, remanent magnetism is little.This kind of material, under relatively low external magnetic field effect, just can produce higher
Magnetic induction, and quickly reach magnetic saturation state along with the increase of external magnetic field；After external magnetic field removes, it
Magnetic is the most basic to disappear.Conventional soft magnetic materials has pure iron and silicon steel plate two kinds.Hard magnetic material to be mainly characterized by remanent magnetism strong, it
After saturated magnetization, even if removing external magnetic field, additionally it is possible to keep stronger magnetic within the longer time.At present with
Generally alnico alloy, siderochrome cobalt alloy.(referring specifically to China dynamo-electric city net www.jdcheng.com)
The operation principle of magnetic coder of the present utility model is: permanent magnet is fixedly installed, and himself produces high-intensity magnetic field, magnetic conduction
Code-disc, with the output shaft rotation of motor, magnetic conduction code-disc has magnetic grid, and magnetic grid is made up of magnetic-conductance portion and non-magnetic district, magnetic-conductance portion by
The permeability magnetic material to magnetic field with perturbation action is made, magnetic field that when magnetic-conductance portion forwards at sensor, sensor detects and non-lead
The magnetic field that when magnetic region forwards at sensor, sensor detects is different, and signal processor is defeated according to the changes of magnetic field detected
Go out string ripple or/or pulse signal, thus can analyze and draw the number of turns of electric machine rotation, angle or direction.
Owing to have employed technique scheme, compare prior art and have the advantage that the magnetic grid machinery of magnetic conduction code-disc adds
Work is convenient, and the magnetic-conductance portion of magnetic grid, the interval in non-magnetic district and quantity are unrestricted, can arrange on magnetic conduction code-disc according to accuracy requirement
Magnetic-conductance portion as much as possible and non-magnetic district, accuracy of detection is higher, and the life-span is long, more compact structure.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of magnetic coder of the present utility model application scenarios schematic diagram on motor；
Accompanying drawing 2 is a kind of relative position view of magnetic grid of the present utility model and InSb magnetoresistive element；
Accompanying drawing 3 is the another kind of relative position view of magnetic grid of the present utility model and InSb magnetoresistive element；
Accompanying drawing 4 is the structural representation of a kind of magnetic conduction code-disc of the present utility model.
In the figures above,
1, electric machine casing；2, motor output shaft；3, permanent magnet；4、PCB；5, InSb magnetoresistive element；5a, InSb magnetic resistance unit
Part；5a ', InSb magnetoresistive element；5b, InSb magnetoresistive element；5b ', InSb magnetoresistive element；50a, wire；50b, wire；6, Hall
Element；7, magnetic conduction code-disc；71, magnetic-conductance portion；72, non-magnetic district.
Detailed description of the invention
Below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described in detail, so that advantage of the present utility model
Can be easier to be readily appreciated by one skilled in the art with feature.
Accompanying drawing 1 show a kind of magnetic coder application scenarios schematic diagram on motor of the present utility model, referring to the drawings 1 to
Shown in 4, magnetic coder includes the fixing magnetic conduction connected of output shaft 2 of the permanent magnet 3 that connect fixing with electric machine casing 1 and motor
Code-disc 7, PCB 4 between permanent magnet 3 and magnetic conduction code-disc 7.Permanent magnet 3 is made up of permanent magnet material, produces stable strong magnetic
?.Magnetic conduction code-disc 7 has magnetic grid, and magnetic grid is formed magnetic-conductance portion 71 and and the magnetic conduction of disturbance by the magnetic field for producing permanent magnet 3
The non-magnetic district composition that portion 71 connects, magnetic-conductance portion 71 is made up of the permeability magnetic material to magnetic field with perturbation action, such as ferrum or ferrum oxygen
Body magnet etc. is made, and non-magnetic district 72 is void region or without permeability magnetic material thus magnetic field is not produced disturbance.Set on PCB 4
Being equipped with signal processor, signal processor includes the sensor for detecting changes of magnetic field, and the sensor in the present embodiment is arranged
Between permanent magnet 3 and magnetic conduction code-disc 7, in addition, can also be provided at the side away from permanent magnet 3 of magnetic conduction code-disc 7.
Magnetic conduction code-disc 7 is prepared by the following two kinds preparation method:
1, step is included: opening through hole on permeability magnetic material and form non-magnetic district 72, non-aperture area is as magnetic-conductance portion 71, structure
Become magnetic grid, prepare magnetic conduction code-disc 7；
2, step is included: plating permeability magnetic material on non-magnet material and form magnetic-conductance portion 71, the part not plating permeability magnetic material is
Non-magnetic district 72, constitutes magnetic grid, prepares magnetic conduction code-disc 7.
At least there is on magnetic conduction code-disc 7 a circle magnetic grid.Referring to the drawings shown in 2,3, magnetic grid can be by multiple magnetic-conductance portion 71 and many
Individual non-magnetic district 72 forms, and has a described non-magnetic district 72 between adjacent two magnetic-conductance portion 71, i.e. magnetic-conductance portion 71 and non-lead
Magnetic region 72 is staggered.Non-magnetic district 72 can be disposed at equal intervals and also can arrange by unequal interval.The shape in non-magnetic district 72 can be
Rectangle, fan annular etc., depending on the shape with specific reference to magnetic conduction code-disc 7.Sensor in the present embodiment includes two pairs of InSb magnetic resistance
Element 5, when residing magnetic field changes, the resistance of InSb magnetoresistive element changes therewith.By two pairs of InSb magnetoresistive elements 5
Measure the angle and direction data of electric machine rotation.A pair InSb magnetoresistive element 5a and 5a ' is mutually electrically connected by wire 50a, another
To InSb magnetoresistive element 5b and, 5b ' be mutually electrically connected by another wire 50b, and the width of InSb magnetoresistive element≤non-magnetic district
The width of the width≤magnetic-conductance portion 71 of 72.Magnetic grid and InSb magnetoresistive element are arranged with reference to two kinds of relative position relations, and it is just like attached
Shown in Fig. 2, when InSb magnetoresistive element 5a or 5b of a centering is just to a certain non-magnetic district 72, another InSb magnetic resistance unit accordingly
Part 5a ' or 5b ' is just to another non-magnetic district 72；Or as shown in Figure 3, when InSb magnetoresistive element 5a or 5b of a centering is just to certain
During one non-magnetic district 72, another InSb magnetoresistive element 5a ' or 5b ' is just to a certain magnetic-conductance portion 71 accordingly.
Magnetic conduction code-disc 7 can be various shape, and magnetic grid may be disposed on each face of magnetic conduction code-disc 7.Below with disc-shaped
Magnetic conduction code-disc 7 as a example by this utility model is further elaborated, magnetic grid is arranged on the bottom surface of disk.4 institutes referring to the drawings
Showing, magnetic conduction code-disc 7 is provided with outer ring magnetic grid and inner ring magnetic grid along its circumferencial direction.Magnetic conduction code-disc 7 uses above-mentioned 1st kind of method system
, i.e. magnetic conduction code-disc 7 entirety is made up of permeability magnetic material, and the outer rim of magnetic conduction code-disc 7 bottom surface circumferentially, equally spaced offers multiple
Hole, this hole the most through magnetic conduction code-disc 7 radially extending along magnetic conduction code-disc 7, hole is the non-magnetic district 72 of outer ring magnetic grid,
Non-aperture area between hole constitutes magnetic-conductance portion 71, hole be shaped as fan annular or similar trapezoidal.Corresponding with outer ring magnetic grid
InSb magnetoresistive element is then fan-shaped or wedge like, and the width of the width in the spacing >=hole of adjacent holes >=InSb magnetoresistive element
Degree.The middle part on magnetic conduction code-disc 7 ground is further opened with hole and forms the non-magnetic district 72 of inner ring magnetic grid, and other parts are then inner ring magnetic grid
Magnetic-conductance portion 71.Sensor also includes the Hall element 6 for detection two, and inner ring magnetic grid is just arranged by Hall element 6.By upper
Understanding, outer ring magnetic grid is for detecting rotational angle and the rotation direction of motor output shaft 2, and inner ring magnetic grid is used for detecting motor output
The zero point of axle 2, thus record the rotation number of turns, constitute the magnetic coder of incremental.
In order to describe conveniently, accompanying drawing 2 to 4 show the magnetic conduction code-disc of simplification, in actual applications, according to actual precision
Demand carries out groove subregion perforate to code-disc, if deisgn product is 360 lines, just need to be divided into 360 regional openings；512 lines just need
Divide 512 fan section perforates, the like.The base area of magnetic conduction code-disc enough can accomplish thousand of line in theory, at mesh
Front actual can accomplish millionth precision, it is achieved more than 17.Magnetic conduction code-disc is preferably aluminum, aluminum dish thickness to be accomplished
Real, do not swing under height rotates.Permanent magnet 3 is preferably Ru-Fe-Mn sintered material, remanent magnetism 1.17T, and number of pole-pairs is 1, self
It is possible to prevent other interference magnetic field invasions outside with high-intensity magnetic field.InSb magnetoresistive element 5 is utilized to produce a pair string ripple of mutual 90 degree,
Hall element 6 is utilized to produce zero point pulse.
Embodiment of above only for technology of the present utility model design and feature are described, its object is to allow and is familiar with this skill
The people of art understands content of the present utility model and is carried out, and can not limit protection domain of the present utility model with this, all
The equivalence change done according to this utility model spirit or modification, all should contain in protection domain of the present utility model.
Claims (9)
1. a magnetic coder, it is characterised in that: include the permanent magnet for fixing connection with electric machine casing, for motor
Output shaft fixes the magnetic conduction code-disc of connection, described magnetic conduction code-disc have at least one circle magnetic grid, described magnetic grid by for described forever
The magnetic field that magnet produces forms the magnetic-conductance portion of disturbance and the non-magnetic district composition connected with described magnetic-conductance portion, and described magnetic-conductance portion is by leading
Magnetic material is made；
This magnetic coder also includes that signal processor, described signal processor include the sensor for detecting changes of magnetic field.
Magnetic coder the most according to claim 1, it is characterised in that: described magnetic conduction code-disc is made up of permeability magnetic material, described
Offering porose on magnetic conduction code-disc, described hole constitutes described non-magnetic district；
Or, described magnetic conduction code-disc is made up of non-magnet material, described magnetic conduction code-disc is fixedly installed permeability magnetic material and constitutes described
Magnetic-conductance portion.
Magnetic coder the most according to claim 1, it is characterised in that: described magnetic conduction code-disc has an outer ring magnetic grid, described outside
Circle magnetic grid is made up of multiple magnetic-conductance portion and multiple non-magnetic district, is provided with one and described non-leads between adjacent two described magnetic-conductance portion
Magnetic region.
Magnetic coder the most according to claim 3, it is characterised in that: described magnetic conduction code-disc is disc-shaped, multiple described non-
Magnetic conduction district is spacedly distributed along the circumference of disk, and described non-magnetic district is in fan annular.
Magnetic coder the most according to claim 4, it is characterised in that: described sensor includes multipair InSb magnetoresistive element,
Each described InSb magnetoresistive element is mutually electrically connected, and one of them InSb magnetoresistive element just to during a certain non-magnetic district another
InSb magnetoresistive element just to a certain magnetic-conductance portion or one of them InSb magnetoresistive element just to another InSb during a certain non-magnetic district
Magnetoresistive element is just to another non-magnetic district.
Magnetic coder the most according to claim 5, it is characterised in that: the width of InSb magnetoresistive element≤non-magnetic district
The width of width≤magnetic-conductance portion.
Magnetic coder the most according to claim 3, it is characterised in that: described magnetic conduction code-disc also has for detecting zero-bit
Inner ring magnetic grid, described inner ring magnetic grid is made up of a magnetic-conductance portion and a non-magnetic district, and described sensor includes for detection zero
The Hall element of position, the corresponding described inner ring magnetic grid of described Hall element is arranged.
8. according to the arbitrary described magnetic coder of claim 1 to 7, it is characterised in that: described sensor is arranged at described permanent magnetism
Between body and described magnetic conduction code-disc.
9. the magnetic conduction code-disc used by the magnetic coder as described in claim 1-7 is arbitrary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620520999.7U CN205808430U (en) | 2016-06-01 | 2016-06-01 | A kind of magnetic coder and magnetic conduction code-disc thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620520999.7U CN205808430U (en) | 2016-06-01 | 2016-06-01 | A kind of magnetic coder and magnetic conduction code-disc thereof |
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| CN205808430U true CN205808430U (en) | 2016-12-14 |
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| CN201620520999.7U Active CN205808430U (en) | 2016-06-01 | 2016-06-01 | A kind of magnetic coder and magnetic conduction code-disc thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052723A (en) * | 2016-06-01 | 2016-10-26 | 江苏森尼克电子科技有限公司 | Magnetic encoder, magnetic code disc thereof and magnetic code disc manufacturing method |
-
2016
- 2016-06-01 CN CN201620520999.7U patent/CN205808430U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052723A (en) * | 2016-06-01 | 2016-10-26 | 江苏森尼克电子科技有限公司 | Magnetic encoder, magnetic code disc thereof and magnetic code disc manufacturing method |
| WO2017206496A1 (en) * | 2016-06-01 | 2017-12-07 | 江苏森尼克电子科技有限公司 | Magnetic encoder and magnetic conductive code disc thereof, and manufacturing method for magnetic conductive code disc |
| CN106052723B (en) * | 2016-06-01 | 2019-12-27 | 江苏森尼克电子科技有限公司 | Magnetic encoder |
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