CN108089025A - A kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy - Google Patents
A kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy Download PDFInfo
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- CN108089025A CN108089025A CN201611045918.3A CN201611045918A CN108089025A CN 108089025 A CN108089025 A CN 108089025A CN 201611045918 A CN201611045918 A CN 201611045918A CN 108089025 A CN108089025 A CN 108089025A
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- magnetoresistive element
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
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Abstract
The present invention provides a kind of magnetoelectric tachometric transducers based on non-crystaline amorphous metal or nanometer crystal alloy.The sensor includes hollow shell, magnetoresistive element and induction coil and permanent magnet in hollow shell；Magnetoresistive element one end is located in hollow shell, attracted with permanent magnet, and the other end stretches out hollow shell, and induction coil is wrapped between the both ends of the magnetoresistive element；Magnetoresistive element stretches out the surface cladding insulating materials of the part of hollow shell；In the present invention magnetoresistive element be by amorphous alloy strips or nanometer crystal alloy band around axis wind or laminate cutting after through being heat-treated, therefore with high magnetic conductivity, extremely low loss and wide frequency range, the caloric value of sensor internal element is greatly reduced, while improves the response speed and measurement accuracy of sensor.
Description
Technical field
It is especially a kind of to be based on non-crystaline amorphous metal or nanocrystalline conjunction the present invention relates to the technical field of magnetoelectric tachometric transducer
The magnetoelectric tachometric transducer of gold.
Background technology
Magnetoelectric tachometric transducer is a kind of instrument that tachometric survey is realized using magnetoelectric induction as basic principle, belongs to non-and connects
Touch tachometer.Magnetoelectric tachometric transducer is made of components such as magnetoresistive element, permanent magnet and induction coils, measurement pair
During as rotating, the coil of magnetoelectric tachometric transducer can generate the magnetic line of force, and measurement object rotates cutting magnetic line, and magnetic circuit is due to magnetic
Resistive generates electromotive force in induction coil.The measurable various permeability magnetic materials of magnetoelectric tachometric transducer are such as：Gear, impeller,
The apertured object rotating speed in the surfaces such as (or slot) disk (or axis) with holes, can be in the adverse circumstances such as smog, oil gas and steam
Work, be widely used in electric power, metallurgy, petrochemical industry, ship and paper industry large rotating machinery (such as steam turbine, compression it is mechanical, electrical
Machine, wind turbine, pump etc.) rotating speed and overspeed measurement, while work pieces process monitor speed, steel pipe application monitor speed and
Also it is used widely in the fields such as gear rotational speed measurement.
At present, the magnetoresistive element of magnetoelectric tachometric transducer uses pure iron material more.And pure iron there are magnetic conductivity it is low, loss
High, the shortcomings of frequency respective range is narrow and temperature stability is poor.Therefore magnetoelectric tachometric transducer there are the problem of have：(1) it is low
Fast characteristic is poor, and (2) response frequency is low, and when rotating speed is excessively high, the frequency response of sensor can not be kept up with；(3) internal element generates heat,
For closed sensor, magnetoresistive element loss is excessive, internal element can be caused to overheat, result even in induction coil mistake
Heat is burnt, and seriously affects the reliability and accuracy of equipment.
Amorphous, nanometer crystal alloy material are prepared using flash set technology, and atom is in the random row of three dimensions
Row, without periodic lattice structure, there is no the defects of crystal grain, crystal boundary, dislocation, thus with excellent soft magnet performance, good
Mechanical property, it is energy saving, environmentally protective the features such as, can promote product to high-performance, high stability, high frequency direction develop, become new
The star of Material Field.
Compared with the traditional materials such as electrical pure iron, amorphous, nanometer crystal alloy material have the following advantages that：1) low energy consumption,
Since amorphous and nanometer crystal alloy material ratio conventional crystal metal soft magnetic material resistivity are high, and amorphous, nanometer crystal alloy band
Only 25 microns of thickness, eddy-current loss is very small；2) magnetic property is excellent, and amorphous and nanometer crystal alloy material have high magnetic conductance
Rate and low coercivity, for example, Fe-based amorphous alloy magnetic conductivity up to electrical pure iron tens even hundred times；3) work is prepared
Skill is simple and quick, environmentally protective；4) temperature stability is high, and the magnetic property of amorphous and nanometer crystal alloy material is in device operating temperature
In the range of (in the range of -50 DEG C to 180 DEG C) variation it is small；5) aging stability is high；6) magnetic impact stability is good；7) it is mechanically stable
Property it is high；8) frequency adaptation scope is wide, and the applicable frequency of amorphous and nanometer crystal alloy material is tens to hundreds of kHz, is pure iron
Hundred times.
Therefore, the comprehensive performance of the magnetoelectric tachometric transducer prepared by amorphous or nanometer crystal alloy is higher, can reduce biography
The Wen Sheng of sensor, while the high rotating speed response frequency and measurement accuracy of sensor can be improved.
The content of the invention
For the above-mentioned state of the art, the present invention is intended to provide a kind of passed based on the magnetoelectric tachometric of amorphous or nanometer crystal alloy
Sensor, the magnetoelectric tachometric transducer have low-temperature-rise, high response frequency and high measurement accuracy.
In order to realize above-mentioned technical purpose, the technical solution adopted in the present invention is：
A kind of magnetoelectric tachometric transducer based on amorphous or nanometer crystal alloy, including hollow shell, magnetoresistive element and
Induction coil and permanent magnet in hollow shell；Magnetoresistive element one end is located in hollow shell, attracted with permanent magnet, separately
Hollow shell is stretched out in one end, and induction coil is wrapped between the both ends of the magnetoresistive element；Magnetoresistive element stretches out the portion of hollow shell
The surface cladding insulating materials divided, for being isolated from the outside；
During working condition, object under test rotates and cutting magnetic line, the magnetic resistance of magnetoresistive element is caused to change, the line of induction
Circle generates induced electromotive force output；
It is characterized in that：The magnetoresistive element be by amorphous alloy strips or nanometer crystal alloy band after axis winding through heat
Handle or by amorphous alloy strips or nanometer crystal alloy band laminate cutting after through being heat-treated.
The non-crystaline amorphous metal or nanometer crystal alloy includes but not limited to Fe-based amorphous alloy, iron-nickel-based amorphous alloy, iron
One kind in cobalt base amorphous alloy, cobalt base amorphous alloy, iron-base nanometer crystal alloy, iron cobalt-based nanometer crystal alloy etc.；Preferably,
The non-crystaline amorphous metal or nanometer crystal alloy are one kind in Fe-based amorphous alloy or iron-base nanometer crystal alloy.
Preferably, in the magnetoresistive element, it is hollow to be more than stretching for the end face radius of attracted one end with permanent magnet
The end face radius of one end of shell.
The insulating materials is unlimited, including epoxy resin, acrylic, polyurethane, copolymer (acrylate urethane),
It is more than one or both of silica gel etc..
The method for coating of the insulating materials is unlimited, including in brushing method, dip coating, spraying process or electrophoretic deposition etc.
One kind, be preferably dip coating.
Preferably, the thickness of the insulating materials is 0.01~0.05mm.
In order to which the element for protecting enclosure is isolated with external environment, while prevent magnetoresistive element from departing from from front end, as
It is preferred that the gap filling encapsulant between the induction coil, magnetoresistive element, permanent magnet and hollow shell.The encapsulation
Agent is unlimited, more than one or both of epoxy resin, polyacetal resin, silica gel etc..
Consolidating for magnetoresistive element is reduced by the opening stretching hollow shell of hollow shell due to one end of magnetoresistive element
It is qualitative, preferably, the end face diameter in the magnetoresistive element close to hollow shell openend is more than opening for the hollow shell
Mouth diameter, so as to prevent magnetoresistive element from departing from from the opening.
For elements such as induction coil, the magnetoresistive elements inside fixing shell, preferably in induction coil, magnetoresistive element, forever
Gap between magnet and hollow shell sets fastener, such as through stent etc..
It in order to which internal element is protected to isolate with external environment, while prevents magnetoresistive element from departing from from front end, is preferably sensing
Gap filling encapsulant between coil, magnetoresistive element, permanent magnet and shell.
The permanent magnet material is unlimited, is preferably one kind in NbFeB, AlNiCo, SmCo.
The hollow shell material is unlimited, including steel, stainless steel, aluminium and its alloy, copper and its alloy, titanium and its conjunction
Gold, ceramics, engineering plastics etc..Preferably, the hollow shell is non-magnetic rustproof Steel material, it is effective against external dry
It disturbs.
The material of the axis is unlimited, including one kind in engineering plastics, steel, aluminium, soft-magnetic stainless steel or soft magnetic ferrite,
Preferably soft-magnetic stainless steel.
The diameter of the axis is preferably 0.5mm~1mm.
In conclusion magnetoresistive element is used in amorphous alloy material or receives in magnetoelectric tachometric transducer provided by the invention
Rice peritectic alloy material, it is then thermally treated to form by the way that non-crystaline amorphous metal or nanometer crystal alloy band are wound as structure around axis,
Or structure is cut into after laminating non-crystaline amorphous metal or nanometer crystal alloy band, it is then thermally treated to form.With the prior art
It compares, the present invention has the advantages that：
(1) compared with the traditional materials such as pure iron, amorphous nano-crystalline alloy material is with magnetic property is excellent, low energy consumption, temperature
The advantages of stability height and wide response frequency scope, the fever of sensor internal element is reduced, and improves revolution speed sensing
The stability and measurement accuracy of device；
(2) using non-crystaline amorphous metal or nanometer crystal alloy band are wound or laminated around axis be cut into structure after be heat-treated
Method, solve block amorphous alloy or nanometer crystal alloy by critical dimension, casting the factors such as efficiency and processability influenced nothing
Method is applied directly on sensor, and there are the limits that low magnetic permeability etc. is difficult to overcome for the non-crystaline amorphous metal or nanometer crystal alloy of powder compacting
The problem of system can not be also applied on solenoid valve.In addition, the magnetic resistance of different structure can be made according to actual needs by this method
Element；
(3) magnetoresistive element of the present invention stretches out the insulating layer that the part cladding of sensor is isolated from the outside, and avoids magnetic resistance member
The direct exposed surface of part and cause oxidation, the problems such as corrosion or friction are scaling-off, and the working environments such as damp and hot, greasy dirt can be subjected to.
Therefore, speed probe of the invention has many advantages, such as that temperature liter is low, response frequency is high and high certainty of measurement, has good
Good application prospect.
Description of the drawings
Fig. 1 is the structure diagram of the magnetoelectric tachometric transducer based on iron-nickel-based amorphous alloy in the embodiment of the present invention 1；
Fig. 2 is the enlarged structure schematic diagram of the magnetoresistive element in the embodiment of the present invention 1；
Fig. 3 is the structure diagram of the magnetoelectric tachometric transducer based on cobalt non-crystaline amorphous metal in the embodiment of the present invention 2；
Fig. 4 is the enlarged structure schematic diagram of the magnetoresistive element in the embodiment of the present invention 2；
Fig. 5 is the structural representation of the magnetoelectric tachometric transducer based on iron nickel base nanometer peritectic alloy in the embodiment of the present invention 3
Figure.
Specific embodiment
The present invention is described in further detail with embodiment below in conjunction with attached drawing, it should be pointed out that reality as described below
It applies example to be intended to convenient for the understanding of the present invention, and does not play any restriction effect to it.
Reference numeral in Fig. 1-5 is：1- shells are stretched in 101- shells and frame B, the 2- line of induction are stretched in frame A, 102- shell
Circle, 3- magnetoresistive elements, 301- axis, 302- magnetoresistive elements A, 303- magnetoresistive element B, 304- magnetoresistive element C, 4- encapsulant, 5- is forever
Magnet, 6- nuts, 7- conducting wires, 8- insulating layers, 9- gears.
Embodiment 1：
Present embodiments provide a kind of magnetoelectric tachometric transducer based on iron-nickel-based amorphous alloy.
As shown in Figs. 1-2, which is included with hollow shell 1, induction coil 2, magnetoresistive element 3, permanent magnet 5, envelope
Fill agent 4 and conducting wire 7.Induction coil 2 is located at permanent magnet 5 in hollow shell 1.
Magnetoresistive element 3 selects iron-nickel-based amorphous alloy material.As shown in Fig. 2, magnetoresistive element 3 mainly includes magnetoresistive element
A302 and magnetoresistive element B303.Magnetoresistive element A302 and magnetoresistive element B303 is by the iron-nickel-based amorphous alloy of two kinds of different in width
It is wound up on axis 301, then the cylindric component for having gradient that annealed and curing process forms.A diameter of 0.5mm of axis 301.
One end of magnetoresistive element B303 and one end of permanent magnet 5 are attracted, one end of magnetoresistive element A302 and magnetoresistive element
B303 is connected, and the other end stretches out hollow shell 1, for detecting the rotating speed of object under test.Induction coil 2 is wrapped in magnetoresistive element
On A302.
Magnetoresistive element A302 stretches out the surface cladding insulating layer 8 of 1 part of shell, for magnetoresistive element to be made to be isolated from the outside,
The thickness of insulating layer 8 is 0.01mm.
Encapsulant 5 is filled in the gap between induction coil 2, magnetoresistive element 3, permanent magnet 5 and shell 1.Nut 6 is used for
Fixed sensor.1.5 meters of conducting wire 7 is drawn in 1 one end of sensor outer housing, for back-end devices such as connecting test and displays.
Hollow shell 1 is non-magnetic rustproof Steel material.
Insulating layer 8 is polyurethane microthin coating.
Encapsulant 5 is silica gel.
Object under test is gear 9.During working condition, gear 9 rotates, and tooth top and tooth paddy are alternately across sensor magnetic
Meeting cutting magnetic line causes the magnetic resistance of magnetoresistive element 3 to change during resistance element 3, and induction coil generates induced electromotive force output,
Rotary speed information is known according to the induced electromotive force.
Embodiment 2：
Present embodiments provide a kind of magnetoelectric tachometric transducer based on cobalt base amorphous alloy.
As shown in Figure 3-4, the structure and the structure of the magnetoelectric tachometric transducer in embodiment 1 are basic for the sensor structure
It is identical, except that：(1) hollow shell 1 is stainless steel material；(2) magnetoresistive element A302 and magnetoresistive element B303 is cobalt-based
Amorphous alloy material；(3) as shown in figure 4, magnetoresistive element 3 mainly includes magnetoresistive element A302, magnetoresistive element B303 and magnetic resistance member
Part C304, the magnetoresistive element 3 be wound, handled and cured around axis 301 by the cobalt base amorphous alloy band of three kinds of different in width and
Into.Shell 1 is stretched out in one end of magnetoresistive element C304 in magnetoresistive element 3, since magnetoresistive element A302 is socketed in magnetoresistive element C304
Surface, end face diameter is more than the opening diameter of shell, therefore can prevent the disengaging of test process magnetoresistive element.
The magnetoelectric tachometric transducer of said structure adds the stability of internal element and the reliability of device, and has
There are good corrosion resistance, impact resistance and wearability.
Embodiment 3：
Present embodiments provide a kind of magnetoelectric tachometric transducer based on iron nickel base nanometer peritectic alloy.
The structure of the magnetoelectric tachometric transducer as figure 5 illustrates, the magnetoelectric tachometric transducer knot in the structure and embodiment 2
Structure is essentially identical, except that magnetoresistive element 3 is iron nickel base nanometer peritectic alloy material, with iron-based, the cobalt in Examples 1 and 2
Base noncrystal alloy material is compared, and iron loss is lower, frequency response range is wider.
In addition, as shown in figure 5, the present embodiment eliminates encapsulant, frame is stretched using being stretched in shell in frame A101 and shell
B102 is simpler for internal elements, preparation processes such as fixed inductor, magnetoresistive element and permanent magnets.
The magnetoelectric tachometric transducer of said structure eliminates encapsulant, reduces fill process and chemical contamination.Therefore
The magnetoelectric tachometric transducer has many advantages, such as that frequency response range is wider, low energy consumption and environmentally protective.
Above-described embodiment be used for illustrate the present invention rather than limit the invention, the present invention spirit and
In scope of the claims, to any modifications and changes that the present invention makes, protection scope of the present invention is both fallen within.
Claims (10)
1. a kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy, including hollow shell, magnetoresistive element, with
And induction coil and permanent magnet in hollow shell；Magnetoresistive element one end is located in hollow shell, attracted with permanent magnet,
The other end stretches out hollow shell, and induction coil is wrapped between the both ends of the magnetoresistive element；Magnetoresistive element stretches out hollow shell
Partial surface cladding insulating materials；
During working condition, object under test rotates and cutting magnetic line, and the magnetic resistance of magnetoresistive element is caused to change, induction coil production
Raw induced electromotive force output；
It is characterized in that：The magnetoresistive element be by amorphous alloy strips or nanometer crystal alloy band after axis winding through heat treatment
Form or by amorphous alloy strips or nanometer crystal alloy band laminate cutting after through being heat-treated.
2. the magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy as described in claim 1, it is characterized in that：Institute
It is non-that the non-crystaline amorphous metal or nanometer crystal alloy stated include Fe-based amorphous alloy, iron-nickel-based amorphous alloy, iron cobalt base amorphous alloy, cobalt-based
One kind in peritectic alloy, iron-base nanometer crystal alloy, iron cobalt-based nanometer crystal alloy.
3. the magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy as described in claim 1, it is characterized in that：Institute
The insulating materials stated is included more than one or both of epoxy resin, acrylic, polyurethane, acrylate urethane, silica gel；
Preferably, the method for coating of the insulating materials is one in brushing method, dip coating, spraying process, electrophoretic deposition
Kind；
Preferably, the thickness of the insulating materials is 0.01~0.05mm.
4. the magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy as described in claim 1, it is characterized in that：Institute
The permanent magnet material stated is one kind in NbFeB, AlNiCo, SmCo.
5. the magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy as described in claim 1, it is characterized in that：Institute
The hollow shell material stated includes steel, stainless steel, aluminium and its alloy, copper and its alloy, titanium and its alloy, ceramics, engineering plastic
Material；
Preferably, the hollow shell is non-magnetic rustproof Steel material.
6. the magnetoelectric tachometric based on non-crystaline amorphous metal or nanometer crystal alloy as described in any claim in claim 1 to 5
Sensor, it is characterized in that：Gap filling encapsulant between the induction coil, magnetoresistive element, permanent magnet and hollow shell；
Preferably, the encapsulant is included more than one or both of epoxy resin, polyacetal resin, silica gel.
7. the magnetoelectric tachometric based on non-crystaline amorphous metal or nanometer crystal alloy as described in any claim in claim 1 to 5
Sensor, it is characterized in that：In the magnetoresistive element, the end face radius of attracted one end, which is more than, with permanent magnet stretches out outside hollow
The end face radius of one end of shell.
8. the magnetoelectric tachometric based on non-crystaline amorphous metal or nanometer crystal alloy as described in any claim in claim 1 to 5
Sensor, it is characterized in that：End face diameter in the magnetoresistive element close to hollow shell openend is more than the hollow shell
Opening diameter.
9. the magnetoelectric tachometric based on non-crystaline amorphous metal or nanometer crystal alloy as described in any claim in claim 1 to 5
Sensor, it is characterized in that：Gap between induction coil, magnetoresistive element, permanent magnet and hollow shell sets fastener.
10. the magnetoelectric tachometric based on non-crystaline amorphous metal or nanometer crystal alloy as described in any claim in claim 1 to 5
Sensor, it is characterized in that：The material of the axis includes one in engineering plastics, steel, aluminium, soft-magnetic stainless steel or soft magnetic ferrite
Kind；The diameter of the axis is preferably 0.5mm~1mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611045918.3A CN108089025A (en) | 2016-11-21 | 2016-11-21 | A kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy |
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| CN201611045918.3A CN108089025A (en) | 2016-11-21 | 2016-11-21 | A kind of magnetoelectric tachometric transducer based on non-crystaline amorphous metal or nanometer crystal alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109782047A (en) * | 2019-02-26 | 2019-05-21 | 中国科学院宁波材料技术与工程研究所 | A kind of direct amplifier system current sensor based on amorphous nano-crystalline abnormal shape magnetic core |
| CN114487464A (en) * | 2021-12-24 | 2022-05-13 | 中国北方发动机研究所(天津) | Self-diagnosis self-cleaning magnetoelectric sensor |
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| CN109782047A (en) * | 2019-02-26 | 2019-05-21 | 中国科学院宁波材料技术与工程研究所 | A kind of direct amplifier system current sensor based on amorphous nano-crystalline abnormal shape magnetic core |
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| CN114487464B (en) * | 2021-12-24 | 2024-02-09 | 中国北方发动机研究所(天津) | Self-diagnosis self-cleaning magneto-electric sensor |
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