CN104122516B - A kind of electrical sheet magnetostriction measurement system and method - Google Patents
A kind of electrical sheet magnetostriction measurement system and method Download PDFInfo
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Abstract
The present invention relates to a kind of electrical sheet magnetostriction measurement system and method, computer controls AWG (Arbitrary Waveform Generator) produces waveform, waveform is changed according to the Data Control AWG (Arbitrary Waveform Generator) that Multichannel data acquisition device uploads, obtain the expectation waveform of magnetic polarization intensity induced voltage using iterative algorithm, and then calculate sample magnetostriction loop line；Power amplifier is amplified processing to the signal receiving, and under the conditions of the fixing sample of excitation unit makes sample be operated in closed magnetic circuit, and applies stress in the direction of magnetization；Laser vibration measurer is used for measuring vibration velocity；Multichannel data acquisition device is used for collection voltages, electric current and vibration velocity；Present invention achieves the measurement to electrical sheet magnetostriction loop line under closed magnetic circuit and stress condition, meet electrical sheet generally uses environment；Making magnetic polarization intensity induction voltage waveform using iterative method is sine wave, instead of traditional analog feedback loop, has and be difficult the features such as concussion and wide frequency range.
Description
Technical field
The present invention relates to magnetic material magnetic energy fields of measurement, more particularly, to a kind of electrical sheet magnetostriction measurement system
And method.
Background technology
Electrical sheet is the magnetically soft alloy of function admirable, comprises stalloy, permalloy, amorphous and the material such as nanocrystalline,
It is indispensable important magnetic material in various motors and transformator.The magnetostriction of electrical sheet refers to make in alternating magnetic field
With under, its volume with alternating magnetic field change and change phenomenon.It not only brings pollution from environmental noise, also can cause unshakable in one's determination sending out
Heat, or even produce resonance, cause electrical equipment fault.The magnetostriction coefficient of electrical sheet has become the weight of transformator, motor
Want performance indications, China is electrical sheet first big producing country, people more and more pay close attention to the magnetostriction of electrical sheet
Energy.Therefore, it is particularly important using the magnetostriction loop line that effectively reliable system and method accurately measures electrical sheet.
At present, existing electrical sheet magnetostrictive measuring instrument commercialization instrument in the world, the MST- that the reason of such as Japan is ground
400C magnetostriction testing meter, it adopts solenoid excitation, and sample free vibration under not having stress, using laser displacement
Measurement amount magnetostriction.But solenoid excitation is open-flux path working method, and the iron core that electrical sheet is constituted mostly is operated in and closes
Under the conditions of magnetic circuit, solenoid excitation mode has certain limitation.In addition, the production of electrical sheet and using producer more concerned with
Magnetostriction under stress condition, above-mentioned measuring apparatus do not have this function.
Another commonly used IEC60404-3 standard specifies in the world SST single sheet measurement method constitutes closed-loop path and surveys
Amount electrical sheet magnetic property.Its excitation unit is monolithic permeameter, employs two vertical yoke and a measurement wire frame.Although
The monolithic permeameter measuring principle that IEC60404-3 standard specifies can be applicable in the magnetostrictive measuring instrument of electrical sheet, but its
Magnetic yoke structure and measurement wire frame structure are unsuitable for magnetostriction measurement under stress condition.
Content of the invention
The technical problem to be solved is for the deficiencies in the prior art, provides a kind of electrical sheet magnetostriction
Measuring system and method, solve the problems, such as magnetostriction measurement, improve China's electrical sheet amount and pass and quality inspection ability, meet high-performance
The advanced manufacturing industry of the new material technology field such as electrical sheet, national great power engineering high-rating generator and transformator is badly in need of
The demand of analysis measurement means.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of electrical sheet magnetostriction measurement system, bag
Include computer, AWG (Arbitrary Waveform Generator), power amplifier, excitation unit, laser vibration measurer and Multichannel data acquisition device；
Described computer, it is used for controlling AWG (Arbitrary Waveform Generator) to produce expectation waveform, is additionally operable to multi-channel data is adopted
The data that storage uploads is analyzed, and controls AWG (Arbitrary Waveform Generator) to change waveform, obtains expectation waveform using iterative algorithm, enters
And calculate sample magnetostriction loop line；
Described AWG (Arbitrary Waveform Generator), it is used for producing random waveform under the control of the computer and being sent to power amplification
Device, also provides synchronous sampling signal for Multichannel data acquisition device；
Described power amplifier, the waveform that it is used for that AWG (Arbitrary Waveform Generator) is sent is amplified processing, and then sends
To excitation unit；
Described excitation unit, it is used for fixing sample, under the conditions of making sample be operated in closed magnetic circuit, is detected sample
Product excitation, applies stress in the direction of magnetization simultaneously；
Described laser vibration measurer, it is used for measuring the magnetostriction vibration speed of excitation unit, and the vibration speed by measurement
Degree is sent to Multichannel data acquisition device；
Described Multichannel data acquisition device, it is used for receiving the vibration velocity of laser vibration measurer transmission, is additionally operable to collection and encourages
The voltage x current data of magnetic device is simultaneously processed, by the data is activation after processing to computer.
The invention has the beneficial effects as follows：In the present invention, excitation unit fixes sample, so that sample is operated in and closes magnetic
Under the conditions of road, the direction of magnetization applies stress, under magnetic polarization intensity induced voltage sine condition, sample can be encouraged
Magnetic, measures magnetostriction loop line, and excitation unit provides suitable measuring environment for the measurement of sample, meets electrical sheet
Generally use environment；Using laser vibration measurer measurement magnetostriction vibration, the vibration velocity recording is adopted through multi-channel data
Storage sampling and computer digital animation are converted into the displacement of sample, and it is high, heavy that laser vibration measurer has accuracy of measurement
Renaturation is good and the features such as magnitude tracing facilitates；Described computer carries out digital frequency analyses to the data of collection, controls any ripple
Shape generator changes waveform, and making magnetic polarization intensity induction voltage waveform using iterative method is sine wave, instead of traditional mould
Intend feedback circuit, have that wave distortion is little, be difficult the features such as concussion and wide frequency range.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described excitation unit include level " return " shape yoke, measurement wire frame, pressue device and pressure guiding dress
Put；Described level " returns " horizontal fixation measuring wire frame in the middle part of shape yoke, and described pressure guider is hollow, rectangular structure, tested
Sample is fixed in pressure guider, and horizontal through measurement wire frame, two ends ride over level and " return " shape described pressure guider
In yoke.
Beneficial effect using above-mentioned further scheme is：Level of the present invention " is returned " shape yoke and is provided for sample
The magnetic circuit of closure, compared with conventional vertical yoke, it is excellent to have that handling ease, not easy to crack, insulation resistance be high and end face is smooth etc.
Point, is especially suitable for the magnetostriction measurement of electrical sheet；Described pressure guider plays pressure guide effect so that sample
Under compressive stress, free vibration in the longitudinal direction, is not deformed in vertical direction.
Further, described level " is returned " shape yoke and is adopted silicon steel laminations composition " returning " word shape, its outer ring square length of side
For 500mm, the inner ring square length of side is 300mm, and lamination thickness is 25mm.
Further, described measurement wire frame includes described measurement wire frame and includes skeleton, armature winding, secondary windings, a H line
Circle and the 2nd H coil；Described skeleton is rectangular hollow platy structure, and it is internally formed rectangular enclosure, divides in the upper and lower both sides of skeleton
Not An Zhuan a H coil and the 2nd H coil, with skeleton, a H coil and the 2nd H coil for axle coiling secondary windings, Jin Er
The outside coiling armature winding of secondary windings.
Beneficial effect using above-mentioned further scheme is：Measurement wire frame adopts upper and lower two H coils, by H coil voltage
With secondary induction control source in Multichannel data acquisition device, made by the analog subtracter in Multichannel data acquisition device
Secondary induction voltage deducts the coil-induced voltage of H, thus obtaining magnetic polarization intensity induced voltage；Above-mentioned measurement wire frame has making
The advantages of process is simple and debugging facilitate.
Further, described skeletal internal cavity height is 5mm, and width is 106mm.
Beneficial effect using above-mentioned further scheme is：Measurement wire frame adopts above-mentioned width, is conducive to and sample
Cooperation；Measurement wire frame open height is big, is easy to the installation of pressue device.
Further, described pressure guider includes upper mounted plate and bottom plate, and sample is placed on bottom plate
On, upper mounted plate keeps certain interval with sample, and fixed plate is provided with illuminator installing hole and fixture installing hole,
Described illuminator installing hole is used for installing the illuminator of laser vibration measurer use, and described fixture installing hole installs fixture, for pressing from both sides
One end of tight sample, the other end of sample connects pressue device.
Beneficial effect using above-mentioned further scheme：Pressure guide effect is played in upper mounted plate and bottom plate cooperation,
Make sample free vibration in the longitudinal direction under compressive stress, be not deformed in vertical direction.
Further, described bottom plate is smooth plates, and the gap between fixed plate and sample is 0.1mm,
Fixed thickness of slab is 3mm, and bottom plate is thick to be 0.1 to 1mm.
Beneficial effect using above-mentioned further scheme：Bottom plate adopts smooth plates, with reduce sample with
The friction of fixed plate, upper mounted plate tilts in vertical direction after preventing sample pressurization, and bottom plate prevents the detected sample being magnetized
Product are held with yoke.
Further, the voltage x current data of described Multichannel data acquisition device collection includes primary exciting current, H coil sense
Answer voltage and secondary induction voltage, comprise analog subtracter inside described Multichannel data acquisition device, made using analog subtracter
Obtain secondary induction voltage and deduct the coil-induced voltage of H, thus obtaining magnetic polarization intensity induced voltage.
Beneficial effect using above-mentioned further scheme：Made by the analog subtracter within Multichannel data acquisition device
Secondary induction voltage deducts the coil-induced voltage of H, thus obtaining the induced signal of magnetic polarization intensity, realizing air-gap flux and compensating.
Another technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of electrical sheet magnetostriction measurement side
Method, comprises the steps：
Step 1, computer controls AWG (Arbitrary Waveform Generator) produces expectation waveform；
Step 2 is it is desirable to waveform is after power amplifier amplification, to the sample excitation in excitation unit；
Step 3, laser vibration measurer measures the magnetostriction vibration speed of excitation unit, and the vibration velocity transmission by measurement
To Multichannel data acquisition device；
Step 4, Multichannel data acquisition device receives the magnetostriction vibration speed that laser vibration measurer sends, and collection simultaneously is encouraged
The coil-induced voltage of primary exciting current in magnetic device, H and secondary induction voltage, are made using its internal analog subtracter
Secondary induction voltage deducts the coil-induced voltage of H, obtains magnetic polarization intensity induced voltage, and then is sent to computer；
Step 5, computer carries out digital frequency analyses to magnetic polarization intensity induced voltage, controls AWG (Arbitrary Waveform Generator) to change
Become waveform, making magnetic polarization intensity induction voltage waveform using iterative method is expectation waveform；
Step 6, is under expectation waveform strip part in magnetic polarization intensity induction voltage waveform, using the magnetostriction now obtaining
The magnetostriction loop line of vibration velocity, primary exciting current and magnetic polarization intensity calculation of lightning induced voltage sample.
On the basis of technique scheme, the present invention can also do following improvement.
Further, calculate being implemented as of magnetostriction loop line of sample in step 6：By mangneto in a cycle
Stretching vibration speed and magnetic polarization intensity induced voltage numerical integration, thus obtain magnetostrictive displacement waveform and magnetic polarization intensity
Waveform；The loop line that magnetostriction changes is obtained with magnetic polarization intensity from waveform；Calculate the sensing of a cycle internal magnetic pole intensity
Voltage and the product of primary exciting current, thus calculate sample loss.
Brief description
Fig. 1 is a kind of electrical sheet magnetostriction measurement system block diagram of the present invention；
Fig. 2 a is excitation unit structural representation of the present invention；
Fig. 2 b " returns " perspective view of shape yoke and measuring coil for level of the present invention；
Fig. 3 a is the front sectional view of measurement wire frame of the present invention；
Fig. 3 b is the sectional view in the AA ' direction along Fig. 3 a；
Fig. 4 a is pressure apparatus of the present invention and the top view of pressure guider；
Fig. 4 b is the sectional view in the BB ' direction along Fig. 4 a；
Fig. 5 is a kind of electrical sheet magnetostriction measurement method flow diagram of the present invention.
In accompanying drawing, the list of parts representated by each label is as follows：
101st, computer, 102, AWG (Arbitrary Waveform Generator), 103, power amplifier, 104, excitation unit, 105, Laser Measuring
Vibration Meter, 106, Multichannel data acquisition device, 201, level " return " shape yoke, 202, measurement wire frame, 203, pressue device, 204, pressure
Power guider, 205, illuminator, 206, fixture, 301, skeleton, 302, armature winding, 303, secondary windings, the 304, the first H line
Circle, 305 the 2nd H coils, 401, upper mounted plate, 402, bottom plate, 403, illuminator installing hole, 404, fixture installing hole,
405th, sample.
Specific embodiment
Below in conjunction with accompanying drawing, the principle of the present invention and feature are described, example is served only for explaining the present invention, and
Non- for limiting the scope of the present invention.
As shown in figure 1, a kind of electrical sheet magnetostriction measurement system, including computer 101, AWG (Arbitrary Waveform Generator)
102nd, power amplifier 103, excitation unit 104, laser vibration measurer 105 and Multichannel data acquisition device 106；Described computer
101, it is used for controlling AWG (Arbitrary Waveform Generator) to produce expectation waveform, and the data being additionally operable to Multichannel data acquisition device is uploaded is entered
Row analysis, controls AWG (Arbitrary Waveform Generator) to change waveform, obtains expectation waveform using iterative algorithm, and then calculates sample magnetic
Cause flexible loop line；Described AWG (Arbitrary Waveform Generator) 102, it is used for producing random waveform under the control of the computer and being sent to power
Amplifier, also provides synchronous sampling signal for Multichannel data acquisition device；Described power method device 103, it is used for any ripple
The waveform that shape generator sends is amplified processing, and then is sent to excitation unit；Described excitation unit 104, it is used for fixing
Sample, under the conditions of making sample be operated in closed magnetic circuit, is sample excitation, and apply in the direction of magnetization should simultaneously
Power；Described laser vibration measurer 105, it is used for measuring the magnetostriction vibration speed of excitation unit, and the vibration velocity by measurement
It is sent to Multichannel data acquisition device；Described Multichannel data acquisition device 106, it is used for receiving the vibration of laser vibration measurer transmission
Speed, is additionally operable to gather primary exciting current, the coil-induced voltage of H and the secondary induction voltage of excitation unit, by the number of collection
According to being sent to computer.
As shown in Fig. 2 a, 2b, described excitation unit includes level and " returns " shape yoke 201, measurement wire frame 202, pressue device
203 and pressure guider 204；Described level " returns " shape yoke 201 middle part laterally fixation measuring wire frame 202, and described pressure is led
It is hollow, rectangular structure to device 204, sample is fixed in pressure guider 204, described pressure guider 204 water
Flat through measurement wire frame 202, two ends ride over level and " return " in shape yoke 201, its one end connection pressue device 203.Institute of the present invention
Level of stating " returns " shape yoke 201, compared with conventional vertical yoke, has that handling ease, not easy to crack, insulation resistance be high and end face
Smooth the advantages of, it is especially suitable for the magnetostriction measurement of electrical sheet；Described pressure guider 204 is so that sample exists
Under compressive stress, free vibration in the longitudinal direction, is not deformed in vertical direction.
Traditional monolithic permeameter all adopts vertical yoke, horizontal yoke tool compared with traditional vertical yoke in the present invention
There is handling ease, not easy to crack, insulation resistance is high and end face is smooth, the magnetostriction being especially suitable for electrical sheet is surveyed
Amount.Horizontal yoke uses high-quality orientation silicon steel lamination to form " returning " word shape, and the outer ring square length of side is 500mm, and inner ring is square
The shape length of side is 300mm, and lamination thickness is 25mm.Horizontal yoke provides the magnetic circuit of closure for sample.
Wherein, described level " is returned " shape yoke and is adopted silicon steel laminations composition " returning " word shape, and its outer ring square length of side is
500mm, the inner ring square length of side is 300mm, and lamination thickness is 25mm.
As shown in Fig. 3 a, 3b, described measurement wire frame includes skeleton 301, armature winding 302, secondary windings 303, a H line
Circle 304 and the 2nd H coil 305；Described skeleton is rectangular hollow platy structure, and it is internally formed rectangular enclosure, on skeleton 301
Lower both sides are respectively mounted a H coil 304 and the 2nd H coil 305, with skeleton 301, a H coil 304 and the 2nd H coil 305
For axle coiling secondary windings 304, and then the outside coiling armature winding 302 in secondary windings.Described measurement wire frame 202 adopts upper
Lower two H coils, by the primary exciting current of collection, the coil-induced voltage of H and secondary induction control source to multi-channel data
In harvester 106, secondary winding voltage is made to deduct the coil-induced voltage of H by analog subtracter, thus it is strong to obtain magnetic polarization
The induced signal of degree；Above-mentioned measurement wire frame has the advantages that strong interference immunity, processing technology are simple and debugging is convenient.
Described skeleton 301 internal cavities height is 5mm, and width is 106mm, and the change of width is to be suitable for sample, because
It is 100mm for tested sample width；Traditional permeameter usually the smaller the better, generally less than 2mm of height, is easy to air-gap flux and mends
Repay, the measurement wire frame open height of the present invention is big, is the use for the ease of pressue device.Due to measuring wire frame open height
Greatly, traditional air-gap flux compensatory approach is no longer applicable, and the present invention adopts upper and lower two H coils, is input to multi-channel data and adopts
In storage, secondary induction voltage is made to deduct the coil-induced voltage of H by the analog subtracter within Multichannel data acquisition device,
Thus obtaining the induced signal of magnetic polarization intensity, realizing air-gap flux and compensating.The method and the mutual sense compensation of conventional one-piece permeameter
Method is compared, and has the advantages that processing technology is simple and debugging is convenient.
As shown in Fig. 4 a, 4b, described pressure guider 204 includes upper mounted plate 401 and bottom plate 402, detected sample
Product are placed on bottom plate 402, and upper mounted plate 401 keeps certain interval with sample, and fixed plate 401 is provided with
Illuminator installing hole 403 and fixture installing hole 404, described illuminator installing hole 403 is used for installing the anti-of laser vibration measurer use
Light microscopic, described fixture installing hole 404 installs fixture, for clamping one end of sample, the other end of sample connects and adds
Pressure device.
For pressue device of the present invention, source pressure controls in classical Pneumatic pressure, and here of the present invention does not exist
Repeat.The thickness of electrical sheet is typically less than 0.5mm, and a length of 500mm of sample, a width of 100mm, the present invention is in length
Tension and the compressive stress of 0-10MPa are applied on direction.Tension implements easily, but the realization of compressive stress is technology closes
Key.Present invention design achieves pressure guide housing 204, and the upper mounted plate 401 of wherein pressure guider is thick to be 3mm, lower fixation
Thickness of slab is 0.1-1mm, and sample is placed on bottom plate 402, and upper mounted plate 401 and sample interval control in 0.1mm.Under
Fixed plate 402 must be smooth flat board, and it is integrally placed on the horizontal plane that two ends yoke, measurement wire frame inside casing and fixture are formed
On.Two perforates are had on upper mounted plate, one is illuminator installing hole 403, for installing the illuminator of laser vibration measurer use；
Another perforate is fixture installing hole 404, for installs fixture, using clamp electrical sheet.Using pressure guider
Purpose be so that sample free vibration in the longitudinal direction under compressive stress, be not deformed in vertical direction.
As shown in figure 5, a kind of electrical sheet magnetostriction measurement method, comprise the steps：
Step 1, computer controls AWG (Arbitrary Waveform Generator) produces expectation waveform；
Step 2 is it is desirable to waveform is after power amplifier amplification, to the sample excitation in excitation unit；
Step 3, laser vibration measurer measures the magnetostriction vibration speed of excitation unit, and the vibration velocity transmission by measurement
To Multichannel data acquisition device；
Step 4, Multichannel data acquisition device receives the magnetostriction vibration speed that laser vibration measurer sends, and collection simultaneously is encouraged
The coil-induced voltage of primary exciting current in magnetic device, H and secondary induction voltage, are made using its internal analog subtracter
Secondary induction voltage deducts the coil-induced voltage of H, obtains magnetic polarization intensity induced voltage, and then is sent to computer；
Step 5, computer carries out digital frequency analyses to magnetic polarization intensity induced voltage, controls AWG (Arbitrary Waveform Generator) to change
Become waveform, making magnetic polarization intensity induction voltage waveform using iterative method is expectation waveform；
Step 6, is under expectation waveform strip part in magnetic polarization intensity induction voltage waveform, using the magnetostriction now obtaining
The magnetostriction loop line of vibration velocity, primary exciting current and magnetic polarization intensity calculation of lightning induced voltage sample.
Same frequency and same magnetic polarization intensity peak under the conditions of, magnetostriction loop line is not unique, its shape with magnetized
Journey is directly related, in order to emphasize comparability must be requested that flux waveformses are sinusoidal (i.e. magnetic polarization intensity induction voltage waveform coefficient
Within ± the 1% of 1.1107) so that magnetostriction loop line is unique.By entering to magnetic polarization intensity induced signal in the present invention
Line number word frequency analyses, then change AWG (Arbitrary Waveform Generator) waveform, make magnetic polarization intensity induced signal ripple using iterative method
Shape is sinusoidal, instead of traditional analog feedback loop, has that wave distortion is little, be difficult the features such as concussion and wide frequency range.
In step 6, the magnetostriction loop line of calculating sample is implemented as：By magnetostrictive vibration in a cycle
Dynamic speed and magnetic polarization intensity induced voltage numerical integration, thus obtain magnetostrictive displacement waveform and magnetic polarization intensity waveform；
The loop line that magnetostriction changes is obtained with magnetic polarization intensity from waveform；Calculate a cycle internal magnetic pole intensity induced voltage and
The product of primary exciting current, thus calculate sample loss.
Under the conditions of sample is operated in closed magnetic circuit in the present invention, and can apply 0-10MPa's in the direction of magnetization
Tension and compressive stress, measurement frequency is 20Hz-400Hz, can measure magnetic to sample excitation under the conditions of sinusoidal waveform of magnetic flux
Cause flexible loop line.Using laser vibration measurer measurement, laser vibration measurer measures the vibration velocity of gained through excessive for magnetostriction vibration
The sampling of channel data harvester and computer digital animation are converted into the displacement of sample.It is accurate that laser vibration measurer has measurement
Exactness is high, reproducible and the features such as magnitude tracing facilitates.When stalloy tested using 500*100mm, present invention measurement frequency
Rate is 20Hz-400Hz, and displacement measurement resolution reaches 3nm, and magnetostriction coefficient resolution is 1 × 10-8, and repdocutbility is better than
5%.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of electrical sheet magnetostriction measurement system is it is characterised in that include computer, AWG (Arbitrary Waveform Generator), power
Amplifier, excitation unit, laser vibration measurer and Multichannel data acquisition device；
Described computer, it is used for controlling AWG (Arbitrary Waveform Generator) to produce waveform, is additionally operable to Multichannel data acquisition device is uploaded
Data be analyzed, control AWG (Arbitrary Waveform Generator) change waveform, using iterative algorithm obtain magnetic polarization intensity induced voltage
Expectation waveform, and then calculate sample magnetostriction loop line；
Described AWG (Arbitrary Waveform Generator), it is used for producing random waveform under the control of the computer and being sent to power amplifier, also
There is provided synchronous sampling signal for Multichannel data acquisition device；
Described power amplifier, the waveform that it is used for that AWG (Arbitrary Waveform Generator) is sent is amplified processing, and then is sent to and encourages
Magnetic device；
Described excitation unit, it is used for fixing sample, under the conditions of making sample be operated in closed magnetic circuit, is that sample is encouraged
Magnetic, applies stress in the direction of magnetization simultaneously；
Described laser vibration measurer, it is used for measuring the magnetostriction vibration speed of excitation unit, and the vibration velocity of measurement is passed
Deliver to Multichannel data acquisition device；
Described Multichannel data acquisition device, it is used for receiving the vibration velocity of laser vibration measurer transmission, is additionally operable to gather excitation dress
The voltage x current data put simultaneously is processed, and the voltage x current data of described Multichannel data acquisition device collection includes primary excitation
The coil-induced voltage of electric current, H and secondary induction voltage, comprise analog subtracter inside described Multichannel data acquisition device, utilize
Analog subtracter makes secondary induction voltage deduct the coil-induced voltage of H, thus obtaining magnetic polarization intensity induced voltage, will process
Data is activation afterwards is to computer.
2. according to claim 1 a kind of electrical sheet magnetostriction measurement system it is characterised in that described excitation unit bag
The level that includes " returns " shape yoke, measurement wire frame, pressue device and pressure guider；
Described level " returns " horizontal fixation measuring wire frame in the middle part of shape yoke, and described pressure guider is hollow, rectangular structure, quilt
Test sample product are fixed in pressure guider, and horizontal through measurement wire frame, two ends ride over level " returning " to described pressure guider
In shape yoke.
3. according to claim 2 a kind of electrical sheet magnetostriction measurement system it is characterised in that described level " returns " shape
Yoke adopts silicon steel laminations to form " returning " word shape, and its outer ring square length of side is 500mm, and the inner ring square length of side is 300mm,
Lamination thickness is 25mm.
4. according to claim 2 a kind of electrical sheet magnetostriction measurement system it is characterised in that described measurement wire frame bag
Include skeleton, armature winding, secondary windings, a H coil and the 2nd H coil；Described skeleton is rectangular hollow platy structure, in it
Portion formed rectangular enclosure, be respectively mounted a H coil and the 2nd H coil in the upper and lower both sides of skeleton, with skeleton, a H coil and
2nd H coil is axle coiling secondary windings, and then the outside coiling armature winding in secondary windings.
5. according to claim 4 a kind of electrical sheet magnetostriction measurement system it is characterised in that described skeletal internal is empty
Chamber height is 5mm, and width is 106mm.
6. according to claim 2 a kind of electrical sheet magnetostriction measurement system it is characterised in that described pressure guiding dress
Put including upper mounted plate and bottom plate, sample is placed on bottom plate, upper mounted plate and sample keep certain
Gap, fixed plate is provided with illuminator installing hole and fixture installing hole, and described illuminator installing hole is used for installing laser
The illuminator that vialog uses, described fixture installing hole installs fixture, for clamping one end of sample, sample another
One end connects pressue device.
7. according to claim 6 a kind of electrical sheet magnetostriction measurement system it is characterised in that described bottom plate is
Smooth plates, the gap between fixed plate and sample is 0.1mm, and fixed thickness of slab is 3mm, and bottom plate is thick
For 0.1 to 1mm.
8. a kind of electrical sheet magnetostriction measurement method is it is characterised in that comprise the steps：
Step 1, computer controls AWG (Arbitrary Waveform Generator) produces expectation waveform；
Step 2 is it is desirable to waveform is after power amplifier amplification, to the sample excitation in excitation unit；
Step 3, laser vibration measurer measures the magnetostriction vibration speed of excitation unit, and the vibration velocity of measurement is sent to many
Channel data harvester；
Step 4, Multichannel data acquisition device receives the magnetostriction vibration speed that laser vibration measurer sends, collection excitation dress simultaneously
The coil-induced voltage of primary exciting current in putting, H and secondary induction voltage, make secondary using its internal analog subtracter
Induced voltage deducts the coil-induced voltage of H, obtains magnetic polarization intensity induced voltage, and then is sent to computer；
Step 5, computer carries out digital frequency analyses to magnetic polarization intensity induced voltage, controls AWG (Arbitrary Waveform Generator) to change ripple
Shape, making magnetic polarization intensity induction voltage waveform using iterative method is expectation waveform；
Step 6, is under expectation waveform strip part in magnetic polarization intensity induction voltage waveform, using the magnetostriction vibration now obtaining
The magnetostriction loop line of speed, primary exciting current and magnetic polarization intensity calculation of lightning induced voltage sample.
9. according to claim 8 a kind of electrical sheet magnetostriction measurement method it is characterised in that in step 6 calculate quilt
Being implemented as of the magnetostriction loop line of test sample product：By magnetostriction vibration speed in a cycle and magnetic polarization intensity sensing
Voltage value integrates, thus obtaining magnetostrictive displacement waveform and magnetic polarization intensity waveform；Obtain from waveform magnetostriction with
The loop line of magnetic polarization intensity change；Calculate a cycle internal magnetic pole intensity induced voltage and the product of primary exciting current, thus
Calculate sample loss.
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| CN104569875B (en) * | 2015-01-06 | 2018-01-05 | 北京航空航天大学 | Silicon steel sheet two-dimensional magnetic property measuring system and its measuring method under a kind of controllable stress condition |
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