CN208569012U - Two-dimentional monolithic magnetic characteristic test macro under biaxial stress loading environment - Google Patents
Two-dimentional monolithic magnetic characteristic test macro under biaxial stress loading environment Download PDFInfo
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- CN208569012U CN208569012U CN201820996140.2U CN201820996140U CN208569012U CN 208569012 U CN208569012 U CN 208569012U CN 201820996140 U CN201820996140 U CN 201820996140U CN 208569012 U CN208569012 U CN 208569012U
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Abstract
The utility model is the two-dimentional monolithic magnetic characteristic test macro under biaxial stress loading environment, the system includes computer, capture card, tested print, B-H composite sensing coil, level-one amplifying circuit, two stress loading devices, the tested print is in the cross being made of long-armed and galianconism, air groove, long-armed and galianconism equal in width are respectively provided in long-armed and galianconism intersection position；B-H composite sensing coil is fixed at the center of detected sample piece upper surface；Three foil gauges are sticked at the center of tested print lower surface, three foil gauges are arranged respectively along x-axis, y-axis and with three, x-axis direction at 45 ° direction；It is separately connected a stress loading device on the long-armed and galianconism of tested print, the lead-out wire of three foil gauges in tested sample surface is connected in the input terminal of capture card through lock-in amplifier.The value that silicon steel sheet magnetic induction density B and magnetic field strength H can accurately be measured, can measure and rolling direction is at stress at any angle, be suitable for actual condition.
Description
Technical field
The utility model relates to two-dimensional magnetic property fields of measurement, the two dimension under specifically a kind of biaxial stress loading environment is single
Piece magnetic characteristic test macro and method.
Background technique
Silicon steel sheet magnetic characteristic test method more general at present is epstein frame method and two-dimentional monolithic method of testing, is divided
Not Yong Yu material one-dimensional magnetic characteristic and two-dimensional magnetic property measurement.
But in actual condition, it includes work in the environment of many factors such as external force, temperature, bias that silicon steel sheet, which is at one,
Make.The many factors such as the residual stress and fixed form that generate in the temperature gradient distribution of material, process are ok
Generate mechanical force.The magnetic characteristic of silicon steel sheet is affected by these factors very greatly, and epstein frame method and two-dimentional monolithic test
Method can no longer meet the requirement of measurement due to not accounting for influence of these factors to silicon steel sheet magnetic characteristic.So for essence
The really magnetic characteristic of measurement silicon steel sheet, it is necessary to the test of material magnetic characteristic is carried out under the actual condition of silicon steel sheet, such as: measuring
During to the artificial application external force of silicon steel sheet or increase temperature, and magnetic characteristic measurement is carried out to silicon steel sheet.
Ding Xiaofeng et al. (silicon steel sheet two-dimensional magnetic under a kind of controllable stress condition of Ding Xiaofeng, Xiong Yanwen, Xiao Lihao, Guo Hong
Characteristic measuring system and its test method, CN104569875A.) although it is contemplated that the two-dimensional magnetic property of material, but apply and answer
The direction of power can only be fixed-direction.The tested print of the device is cube, applies external force in the upper surface of cube, cube
The front, rear, left and right surface of body is connected with magnetic yoke, though this structure can test material two-dimensional magnetic property, be unable to measure with
Influence of the rolling direction at stress at any angle to tested print two-dimensional magnetic property.
Utility model content
For in actual condition, silicon steel material works under stress operating condition, and the utility model provides biaxial stress and adds
Two-dimentional monolithic magnetic characteristic test macro and method under the conditions of load, can accurately measure silicon steel sheet magnetic induction density B and magnetic field is strong
The value for spending H, can measure and rolling direction is at stress at any angle, be suitable for actual condition.
To achieve the goals above, the technical solution adopted in the utility model is:
A kind of two-dimentional monolithic magnetic characteristic test macro under biaxial stress loading environment, the system include computer, capture card,
Tested print, B-H composite sensing coil, level-one amplifying circuit, two stress loading devices, which is characterized in that the detected sample
Piece is in the cross being made of long-armed and galianconism, is respectively provided with air groove in long-armed and galianconism intersection position, long-armed and galianconism is wide
Degree, the width of air groove are the 1/25 of long-armed width, and the depth of air groove is 1~4 times of air groove width；Define tested print
Long-armed direction is the direction x, and galianconism direction is the direction y；
The B-H composite sensing coil includes H coil and four B probes, and H coil is divided into Hx coil and Hy coil, Hx line
Circle and the perpendicular arranged crosswise of Hy coil are on H coil substrate, and the H coil substrate is mounted on the center of B probe substrate, in H
Four B probes, and four perpendicular arranged crosswises of B probe, four B probes to B are arranged on the B probe substrate of coil substrate periphery
The distance at probe substrate center is equal, and the line of two opposite B probes is parallel with Hx coil or Hy coil；H coil and B are visited
The welding hole of needle progress multiple twin outlet, H coil multiple twin outlet and B probe multiple twin outlet is arranged on B probe substrate；
B-H composite sensing coil is fixed at the center of detected sample piece upper surface；At the center of tested print lower surface
The first foil gauge, the second foil gauge, third foil gauge are sticked, three foil gauges are at 45 ° respectively along x-axis, y-axis and with x-axis
Three, direction direction arrangement；
" c-type " magnetic yoke " c-type " magnetic yoke under, and two " c-type " magnetic yokes are respectively arranged in the upper and lower surface of tested print
It is disposed vertically, the opening of c-type is opposite；Two leg portions of two " c-type " magnetic yokes wind field winding；
The multiple twin outlet of B-H composite sensing coil is both connected on the corresponding interface of level-one amplifying circuit, level-one amplification
The output end of circuit is connected to the respective input of capture card, and capture card connects computer simultaneously, and it is empty that magnetic measurement is loaded in computer
Quasi- instrument workbench, capture card and computer carry out two-way communication, and the output end of the capture card is by power amplifier and corresponding water cooling
Resistance series connection, then be connected on a pair of of field winding through corresponding isolating transformer；
It is separately connected a stress loading device on the long-armed and galianconism of tested print, each stress loading device connects
Computer is connect, two stress loading devices are controlled by the magnetic measurement virtual instrument workbench in computer, are tested in sample surface
The lead-out wire of three foil gauges is connected in the input terminal of capture card through lock-in amplifier.
A kind of two-dimentional monolithic magnetic characteristic test method under biaxial stress loading environment, method includes the following steps:
Step 1: tested print is designed:
Tested print is in the cross being made of long-armed and galianconism, is respectively provided with air groove in long-armed and galianconism intersection position,
The definition long-armed direction of detected sample piece is the direction x, and galianconism direction is the direction y；
Step 2: design B-H composite sensing coil:
H coil uses square crossing structure, and for measuring tested print Surface field intensity, the magnetic induction for being tested print is strong
Degree B measured using sonde method, measurement be magnetic induction density B inductive voltage value；Four B probes are centered on H coil
Perpendicular arranged crosswise carries out multiple twin to the outlet of H coil and B probe, obtains B-H composite sensing coil；
Step 3: assembling B-H composite sensing coil and tested print:
B-H composite sensing coil is fixed at the center of detected sample piece upper surface, tested print and B probe contact portion
The insulated paint divided removes；Stick the first foil gauge, the second foil gauge, third foil gauge at the center of tested print lower surface, three
A foil gauge is arranged respectively along x-axis, y-axis and with three, x-axis direction at 45 ° direction, to measure the strain of different angle；
Tested print is fixed with grips pincers again；
" c-type " magnetic yoke " c-type " magnetic yoke under, and two " c-type " magnetic yokes are respectively arranged in the upper and lower surface of tested print
It is disposed vertically, the opening of c-type is opposite；Two leg portions of two " c-type " magnetic yokes wind field winding；
Step 4: connection experimental circuit:
The multiple twin outlet of B-H composite sensing coil is both connected on the corresponding interface of level-one amplifying circuit, level-one amplification
The output end of circuit is connected to the respective input of capture card, and capture card connects computer simultaneously, and it is empty that magnetic measurement is loaded in computer
Quasi- instrument workbench, capture card and computer carry out two-way communication, and the output end of the capture card is by power amplifier and corresponding water cooling
Resistance series connection, then be connected on a pair of of field winding through corresponding isolating transformer；
It is separately connected a stress loading device on the long-armed and galianconism of tested print, each stress loading device connects
Computer is connect, two stress loading devices are controlled by the magnetic measurement virtual instrument workbench in computer, are tested in sample surface
The lead-out wire of three foil gauges is connected in the input terminal of capture card through lock-in amplifier,
Step 5: device is corrected:
Before the experiments with lock-in amplifier acquisition foil gauge signal, and according to adopted strain signal to tested print into
Row initialization correction guarantees that print is tested before experiment starts not to be distorted, deform brought external force；If detecting distortion
Or deformation, tested print is leveled using computer proof stress loading device；
Step 6: start to be tested:
The excited signal of capture card output different frequency is controlled, while controlling two stress loading devices and exporting different size
Power, the power of two stress loading devices is orthogonal, acquires the output signal and foil gauge of B-H composite sensing coil at this time
Output signal controls collected Bx, By signal of capture card using magnetic measurement virtual instrument workbench, synthesizes a standard circular
Or ellipse；It is post-processed again, obtains BH curve, the damage curve under different power, under different magnet excitation frequencies, it is final complete
Two-dimentional monolithic magnetic characteristic measurement under pairs of material biaxial stress loading environment.
Compared with prior art, the utility model has the beneficial effects that
(1) the utility model is tested print and uses cross-like shape, is for the ease of applying external force to tested print, in quilt
The corner of test sample piece cuts out air groove, avoids tested print x, the magnetic flux in two direction y interacts, and can increase tested
The magnetic flux size of print central area, air groove end use circular shape, are conducive to reduce harmonic wave；
(2) the utility model using the epoxy resin of thickness very little (with a thickness of 0.3~0.4mm) as H coil substrate,
So that the tested sample surface of internal layer H coil distance is closer；The H coil for measuring different directions magnetic field strength uses square crossing knot
Structure can guarantee that the region of measurement is identical, improve the accuracy of two-dimentional monolithic magnetic characteristic measurement；
(3) for the utility model when measuring magnetic induction intensity, using sonde method rather than coil method is strong to measure magnetic induction
Degree, avoids deforming during the hole of detected sample on piece is in applied force, damages induction coil；It, should compared with induction coil method
Method reduces influence of the edge effect to measuring accuracy, keeps test zone magnetic field more uniform, and can be to avoid because of punching
Caused by material magnetic characteristic destruction；
(4) the utility model is while measuring material magnetic characteristic, it is contemplated that influence of the stress condition to material magnetic characteristic,
More close to the actual condition of silicon steel sheet, for the magnetic measurement for not considering stress condition, it is more suitable for engineering reality.
(5) the utility model has used two stress loading devices, and there are two motors, and two motors are as application external force
External force source, can synthesize and rolling direction is at resultant force at any angle, apply external force and rolling direction angle not to discuss
Meanwhile the influence to material magnetic characteristic；In a practical situation, external force may be with rolling direction at any angle, if only
The stress that a direction can be applied is still very big with the gap of actual conditions；
(6) lock-in amplifier is used when acquiring foil gauge strain signal, is conducive to detect faint strain signal, and
Precision is improved, lock-in amplifier has very strong noise resisting ability, can be used in various high-precision measuring systems.
Detailed description of the invention:
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 (a) is the schematic view of the front view of the B-H composite sensing coil in the utility model；
Fig. 1 (b) is the overlooking structure diagram of the B-H composite sensing coil in the utility model；
Fig. 2 is the structure chart of the tested print in the utility model；
Fig. 3 is the schematic view of the mounting position of the foil gauge in the utility model；
Fig. 4 is the fixed form that print and B-H composite sensing coil are tested in the utility model；
Fig. 5 is the schematic diagram of magnetic yoke loading method in the utility model；
Fig. 6 is the two-dimentional monolithic magnetic measurement test macro in the utility model under the conditions of stress loading；
Description of symbols:
1.Hx coil, 2.Hy coil, 3. the oneth B probes, 4. the 2nd B probes, 5. the 3rd B probes, 6. the 4th B probes, 7.H
Coil substrate, 8.B probe substrate, 9. connecting screws, 10. twisted pairs, 11.B probe fixed plate, 12.B-H composite sensing coil,
13 tested prints, 14. clamping screws, 15 fixed devices, 16. support frames, " c-type " magnetic yoke on 17., " c-type " magnetic yoke under 18.,
19.x axis field winding, 20.y axis field winding, 21. level-one amplifying circuits, 22. capture cards, the work of 23. magnetic measurement virtual instruments
Platform, 24. power amplifiers, 25. power amplifiers, 26. water-cooled resistances, 27. water-cooled resistances, 28. isolating transformers, 29. isolating transformers, 30.
One foil gauge, 31. second foil gauges, 32. third foil gauges, 33. stress loading devices, 34. stress loading devices, 35. locking phases
Amplifier.
Specific embodiment
Below in conjunction with the attached drawing of the utility model, the technical solution of the utility model is clearly and completely described,
Obviously, described embodiment is only the utility model a part of the embodiment, instead of all the embodiments.It is practical new based on this
Embodiment in type, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, fall within the protection scope of the utility model.
Two-dimentional monolithic magnetic characteristic test macro under the utility model biaxial stress loading environment include computer, capture card,
Tested print 13, B-H composite sensing coil 12, level-one amplifying circuit, two stress loading devices, which is characterized in that the quilt
Test sample piece is in the cross being made of long-armed and galianconism, is respectively provided with air groove 133 in long-armed 131 and 132 intersection position of galianconism, long
Arm and galianconism equal in width, the width of air groove are the 1/25 of long-armed width, and the depth of air groove is 1~4 times of air groove width；
The definition long-armed direction of detected sample piece is the direction x, and galianconism direction is the direction y；
The B-H composite sensing coil includes H coil and four B probes, and H coil is divided into Hx coil 1 and Hy coil 2, Hx
On H coil substrate 7, the H coil substrate 7 is mounted in B probe substrate 8 for coil 1 and the perpendicular arranged crosswise of Hy coil 2
Centre, four B probes of arrangement on the B probe substrate 8 of 7 periphery of H coil substrate, and four perpendicular arranged crosswises of B probe, four
The distance at B probe to 8 center of B probe substrate is equal, and the line of two opposite B probes is parallel with Hx coil or Hy coil；H
The welding hole of coil and the progress multiple twin outlet of B probe, H coil multiple twin outlet and B probe multiple twin outlet is arranged in B probe substrate
On 8；
B-H composite sensing coil is fixed at the center of detected sample piece upper surface；At the center of tested print lower surface
The first foil gauge 30, the second foil gauge 31, third foil gauge 32 are sticked, three foil gauges are respectively along x-axis, y-axis and and x-axis
Three direction arrangements in direction at 45 °；
" c-type " magnetic yoke 18 under of " c-type " magnetic yoke 17, and two " c-type " are respectively arranged in the upper and lower surface of tested print
Magnetic yoke is disposed vertically, and the opening of c-type is opposite；Two leg portions of two " c-type " magnetic yokes 18 wind field winding；
The multiple twin outlet of B-H composite sensing coil is both connected on the corresponding interface of level-one amplifying circuit 21, level-one is put
The output end of big circuit is connected to the respective input of capture card, and capture card 22 connects computer simultaneously, magnetic survey is loaded in computer
Amount virtual instrument workbench 23, capture card and computer carry out two-way communication, and the output end of the capture card is by power amplifier and accordingly
Water-cooled resistance series connection, then be connected on a pair of of field winding through corresponding isolating transformer；
It is separately connected a stress loading device on the long-armed and galianconism of tested print, each stress loading device connects
Computer is connect, two stress loading devices are controlled by the magnetic measurement virtual instrument workbench 23 in computer, are tested in sample surface
The lead-out wires of three foil gauges be connected in the input terminal of capture card through lock-in amplifier 35.
The utility model also protects the two-dimentional monolithic magnetic characteristic test method (abbreviation method) under biaxial stress loading environment,
The following steps are included:
Step 1: tested print 13 is designed:
Tested print is in the cross being made of long-armed and galianconism, is all provided with and empties in long-armed 131 and 132 intersection position of galianconism
Air drain 133, long-armed and galianconism equal in width, the width of air groove are the 1/25 of long-armed width, and the depth of air groove is air groove width
1~4 times of degree, air groove end are arc-shaped；The definition long-armed direction of detected sample piece is the direction x, and galianconism direction is y
Direction；
Step 2: design B-H composite sensing coil 12:
H coil uses square crossing structure, and for measuring tested print Surface field intensity, the magnetic induction for being tested print is strong
Degree B is measured using sonde method (sonde method is the method having had), measurement be magnetic induction density B inductive voltage value；
H coil is divided into Hx coil 1 and Hy coil 2, and Hx coil 1 and the perpendicular arranged crosswise of Hy coil 2 are in H coil substrate 7
On, the H coil substrate 7 is mounted on the center of B probe substrate 8, arranges four on the B probe substrate 8 of 7 periphery of H coil substrate
A B probe, and four perpendicular arranged crosswises of B probe, the distance to 8 center of B probe substrate are equal, two opposite B are visited
The line of needle is parallel with Hx coil or Hy coil；H coil and B probe carry out multiple twin outlet, and H coil multiple twin outlet and B probe are double
The welding hole for twisting out line is arranged on B probe substrate 8；
Specific manufacturing process is: a Hx coil being wrapped on the H coil substrate 7 of 0.3~0.4mm thickness, then by one
Hy coil is covered in Hx coil outer, and the diameter of Hx coil is smaller compared with the diameter of Hy coil, is respectively used for measuring the H sense of both direction
Answer voltage value；7 four corners band of H coil substrate is jagged, can reduce the extrusion abrasion of Hx coil 1 and Hy coil 2；
It is mounted on 4 pieces of B probes are orthogonal on B probe substrate 8, each probe location distance B probe substrate center
12.5mm；H coil substrate can carry out split with B probe substrate, and H coil substrate 7 can be stuck in the center of B probe substrate 8 just, then
With adhesive bonds such as glue.Multiple twin, H coil multiple twin outlet and B probe multiple twin outlet are carried out to the outlet of H coil and B probe
Welding hole be located on B probe substrate 8, in line with outlet is facilitated, easily distinguishable different welding hole reduces mutual welding hole
The principle of influence be configured, reduce the interference from magnetic field on another direction to the full extent.So far it completes
The production of B-H composite sensing coil.
Step 3: assembling B-H composite sensing coil and tested print:
B-H composite sensing coil is fixed at the center of detected sample piece upper surface, tested print and B probe contact portion
The insulated paint divided removes；The first foil gauge 30, the second foil gauge 31, third foil gauge are sticked at the center of tested print lower surface
32, three foil gauges are arranged respectively along x-axis, y-axis and with three, x-axis direction at 45 ° direction, to measure different angle
Strain；Tested print is fixed with grips pincers, prevents tested print vibration from influencing experiment measurement；
" c-type " magnetic yoke 18 under of " c-type " magnetic yoke 17, and two " c-type " are respectively arranged in the upper and lower surface of tested print
Magnetic yoke 17,18 is disposed vertically, and the opening of c-type is opposite；Two leg portions of two " c-type " magnetic yokes 18 wind field winding；
Field winding is divided into x-axis field winding 19 and y-axis field winding 20；
Step 4: connection experimental circuit:
The multiple twin outlet of B-H composite sensing coil is both connected on the corresponding interface of level-one amplifying circuit 21, level-one is put
The output end of big circuit is connected to the respective input of capture card, and capture card 22 connects computer simultaneously, magnetic survey is loaded in computer
Virtual instrument workbench 23 is measured, capture card and computer carry out two-way communication, and the output end of the capture card passes through power amplifier (24,25)
It connects with corresponding water-cooled resistance (26,27), then be connected to (x on a pair of of field winding through corresponding isolating transformer (28,29)
Axis field winding 19 or y-axis field winding 20)；
A stress loading device (33,34), each stress loading are separately connected on the long-armed and galianconism of tested print
Device is all connected with computer, controls two stress loading devices, detected sample by the magnetic measurement virtual instrument workbench 23 in computer
The lead-out wire of three foil gauges on piece surface is connected in the input terminal of capture card through lock-in amplifier 35,
The collected card acquisition of B induced voltage signal, H induced voltage signal, and then by magnetic measurement virtual instrument workbench 23
It is reduced into B signal and H signal；Check that circuit connection has no problem；By the defeated of the force snesor of stress loading device and foil gauge
Signal is acquired out；
Step 5: device is corrected:
It is tested whether print has a degree of deformation before the experiments due to not can guarantee, so using before the experiments
Lock-in amplifier acquires the signal of foil gauge, and carries out initialization correction to tested print according to adopted strain signal, protects as far as possible
For card before experiment starts, tested print is the brings external force such as not distorted, deformed；If detecting distortion or deformation, make
Tested print is leveled with computer proof stress loading device；
Step 6: start to be tested:
The excited signal of capture card output different frequency is controlled, while controlling two stress loading devices and exporting different size
Power, the power of two stress loading devices is orthogonal, force action with rolling direction on direction at any angle, energy
Measurement and rolling direction at stress at any angle, acquire at this time B-H composite sensing coil output signal and foil gauge it is defeated
Signal out, using magnetic measurement virtual instrument workbench control the collected Bx of capture card, By signal, synthesize a standard circular or
Person's ellipse；It is post-processed again, so that it may obtain the spies such as BH curve, the damage curve under different power, under different magnet excitation frequencies
Linearity curve is finally completed to the two-dimentional monolithic magnetic characteristic measurement under material biaxial stress loading environment.
The length of air groove is in length within the scope of 5-15mm in the utility model.
Stress loading device described in the utility model is collectively formed by single-chip microcontroller, driver, force snesor and motor, will
Single-chip microcontroller is connected to computer serial port, and single-chip microcontroller is connected to the motor by driver, and driving motor applies external force to tested print；Electricity
The motor that brain-capacity controls in two stress loading devices works independently, and two motors can also be made to work at the same time, two electricity
When machine works at the same time, the size for the power that two motors are applied can control, two power is allow to synthesize the power of any direction.Quilt
The foil gauge lead-out wire for surveying sample surface is connected to lock-in amplifier, and the output signal of force snesor and foil gauge is adopted
Collection.
Embodiment 1
Two-dimentional monolithic magnetic characteristic test method under the present embodiment biaxial stress loading environment, comprising the following steps:
Step 1: designing tested print, and the shape for being tested print is cross, in order to adapt to peripheral unit, such as grips pincers,
Select detected sample chip size for width 100mm, long arm lengths 440mm, galianconism length 230mm；The turning of print is tested in cross
Place cuts out air groove, and the width of air groove is 4mm, length 10mm；To reduce harmonic wave as far as possible, air groove end is circular arc
Shape；The definition long-armed direction of detected sample piece is the direction x, and galianconism direction is the direction y.
Step 2: design B-H composite sensing coil.H coil uses square crossing structure, for measuring tested sample surface
The magnetic induction density B of magnetic field strength, tested print is measured using sonde method, measurement be magnetic induction density B induced electricity
Pressure value.
One small H coil is wrapped on the H coil substrate 7 of 0.4mm thickness, then a slightly larger H coil is covered in small H
Coil outer is respectively used for measuring the H induced voltage numerical value of both direction；H coil substrate four corners band is jagged, can reduce
The extrusion abrasion of induction coil；It is mounted on 4 pieces of B probes are orthogonal on B probe substrate, each probe location distance B probe base
Plate center 12.5mm；H coil substrate can carry out split with B probe substrate.Multiple twin, H line are carried out to the outlet of H coil and B probe
Circle multiple twin outlet and the welding hole of B probe multiple twin outlet are located on B probe substrate 8, and welding hole is easily distinguishable in line with facilitating outlet
Different welding holes reduces the principle of mutual influence to be configured, reduces come from another side to the full extent
The interference in upward magnetic field.So far the production of B-H composite sensing coil is completed.
Step 3: B-H composite sensing coil is fixed at the center of detected sample piece upper surface, and tested print and B are visited
The insulated paint of needle contact portion removes；The first foil gauge 30, the second foil gauge 31, are sticked at the center of tested print lower surface
Three foil gauges 32, three foil gauges arrange (referring to Fig. 3) respectively along x-axis, y-axis and with three, x-axis direction at 45 ° direction,
To measure the strain of different angle；Tested print is fixed with grips pincers, prevents tested print vibration from influencing experiment measurement.
" c-type " magnetic yoke 18 under of " c-type " magnetic yoke 17, and two " c-type " are respectively arranged in the upper and lower surface of tested print
Magnetic yoke is disposed vertically, and the opening of c-type is opposite；Two leg portions of two " c-type " magnetic yokes 17,18 wind field winding (ginseng
See Fig. 5)；
Step 4: connection experimental circuit:
The multiple twin outlet of B-H composite sensing coil is both connected on the corresponding interface of level-one amplifying circuit 21, level-one is put
The output end of big circuit is connected to the respective input of capture card, and capture card 22 connects computer simultaneously, magnetic survey is loaded in computer
Amount virtual instrument workbench 23, capture card and computer carry out two-way communication, and the output end of the capture card is by power amplifier and accordingly
Water-cooled resistance series connection, then be connected on a pair of of field winding through corresponding isolating transformer；
It is separately connected a stress loading device on the long-armed and galianconism of tested print, each stress loading device connects
Computer is connect, two stress loading devices are controlled by the magnetic measurement virtual instrument workbench 23 in computer, are tested in sample surface
The lead-out wires of three foil gauges be connected in the input terminal of capture card through lock-in amplifier 35,
Make the collected card acquisition of B induced voltage signal, H induced voltage signal, and then by magnetic measurement virtual instrument workbench
It is reduced into B signal and H signal；Check that circuit connection has no problem.
Step 5: device is corrected.Due to not can guarantee before the experiments be tested print whether have it is a degree of
Deformation, so acquiring the signal of foil gauge with lock-in amplifier before the experiments, and according to adopted strain signal to detected sample
Piece carries out initialization correction, guarantees before experiment starts as far as possible, and tested print is the brings external force such as not distorted, deformed
's；If detecting distortion or deformation, tested print is leveled using computer control driver driving motor.
Step 6: start to be tested.The excited signal of capture card output different frequency is controlled, while controlling motor output
Different size of power acquires the output signal of B-H composite sensing coil and the output signal of foil gauge at this time, uses magnetic measurement void
Quasi- instrument workbench controls the collected Bx of capture card, and By signal synthesizes a standard circular or ellipse；After carrying out again
Reason, so that it may obtain the BH curve under different power, under different magnet excitation frequencies, the characteristic curves such as damage curve are finally completed to material
Expect the two-dimentional monolithic magnetic characteristic measurement under biaxial stress loading environment.
It is 12 structure chart of B-H composite sensing coil as shown in Fig. 1 (a), Fig. 1 (b)；By Hx coil 1, Hy coil 2 is wrapped in
It is fixed on B probe substrate 8 on H coil substrate 7 with the first, second, third, fourth B probe 3,4,5,6.4 pieces of B probes and 2
The outlet of a H coil uses twisted pair 10；In order to preferably fix B probe, B probe top is fixed with B probe fixed plate 11,
It is connected between B probe fixed plate 11 and B probe substrate 8 by connecting screw 9.
As shown in Fig. 2, for tested 13 shape of print；For ease of description, it is specified that detected sample piece is long-armed for x-axis, galianconism y
Axis.400 points are taken to carry out in the tested print center region 40*40mm using parametric method using Ansys Mexwell software
Emulation；It seeks each point magnetic induction intensity and calculates the variance of magnetic induction intensity under each length, simulation result is as shown in the table.
| Flute length (mm) | 0 | 2 | 4 | 6 | 8 |
| Variance | 0.00023590 | 9.11472e-0 | 8.6497e-05 | 6.40915e-0 | 1.01157e-0 |
| Flute length (mm) | 10 | 12 | 14 | 16 | 18 |
| Variance | 7.1825e-06 | 0.00058889 | 0.00106376 | 0.00182557 | 0.00313817 |
Using Ansys Workbench Static Structure software using parametric method to tested print center
The region 40*40mm takes 400 points to be emulated；It seeks each point stress and calculates the variance of stress under each length, simulation result
As shown in the table.Referring to simulation result, in conjunction with actual processing difficulty, and considers tested print center magnetic flux uniformity, applies and draw
The problems such as uniformity at print center is tested when power, selects to output length to 45 ° of directions as 10mm, and width is the air groove of 4mm,
Air groove end is that arc-shaped effect is optimal.
| Flute length (mm) | 1 | 2 | 3 | 4 | 5 |
| Variance | 0.002402 | 0.002405 | 0.00216 | 0.002032 | 0.001903 |
| Flute length (mm) | 6 | 7 | 8 | 9 | 10 |
| Variance | 0.001902 | 0.001856 | 0.001849 | 0.001865 | 0.001821 |
| Flute length (mm) | 11 | 12 | 13 | 14 | 15 |
| Variance | 0.001804 | 0.001865 | 0.002012 | 0.002009 | 0.002214 |
As shown in figure 4, for the fixed form of tested print 13 and B-H composite sensing coil 12, B-H composite sensing coil
12 are placed at tested 13 upper surface center of print, and the insulated paint of detected sample on piece and B probe contact position is removed；Pass through
Clamping screw 14 further reduces the distance between B-H composite sensing coil 12 and tested print 13.By tested print 13
It is placed on support frame 16, and is fixed by clamping screw 14 and fixed device 15.Since tested print 13 is thin and big, in order to
Guarantee that tested print is horizontal, it is necessary to be fixed to the long-armed and galianconism of tested print, come it to avoid tested print Zona transformans
His power influences the accuracy of measurement.Four arms of tested print, which are fixed to clamp, to be fastened.
As shown in fig. 6, for the two-dimentional monolithic magnetic characteristic measuring system under the conditions of the stress loading of the present embodiment.Stress loading
Device 33 and 34 respectively includes single-chip microcontroller, driver, motor, force snesor, force snesor display instrument.
The stress loading mode of stress bringing device is as follows: two motors be connected in grips pincers pull grips pincers into
And pulling force is applied to tested print 13.Single-chip microcontroller controls driver, and then driving motor applies pulling force to tested print 13.It pastes
Strain signal is generated in the foil gauge 30,31,32 of tested sample surface, due to strain signal value very little, and is highly prone to outside
Strain signal is input in lock-in amplifier 35 by effect of signals, and is further passed to magnetic measurement virtual instrument workbench.Together
When the power that applies of motor sensed by force snesor, and be transmitted to force snesor display instrument and shown.
Magnetic measurement virtual instrument workbench 23 in computer controls capture card 22 and issues excited signal, and excited signal passes through function
After putting 24,25 amplifications, enter the x of two-dimentional monolithic magnetic characteristic measuring device by water-cooled resistance 26,27, y-axis field winding 19,
20, be tightly attached to tested sample surface B-H composite sensing coil generate induced voltage signal, respectively by Hx coil 1, Hy coil 2,
The Hx induced voltage signal that second probe 4 and the 4th probe 6, the first probe 3 and third probe 5 generate, Hy induced voltage signal,
Bx induced voltage signal, By induced voltage signal are connected to level-one amplifying circuit 21.Unify to enter capture card again after amplification
22, it is acquired and is shown by magnetic measurement virtual instrument workbench 23.
Magnetic measurement virtual instrument workbench 23 in the present embodiment is a virtual software of the load in computer, this sheet
Field popular software.
The utility model does not address place and is suitable for the prior art.
Claims (4)
1. the two-dimentional monolithic magnetic characteristic test macro under a kind of biaxial stress loading environment, the system include computer, capture card, quilt
Test sample piece, B-H composite sensing coil, level-one amplifying circuit, two stress loading devices, which is characterized in that the tested print
In the cross being made of long-armed and galianconism, air groove is respectively provided in long-armed and galianconism intersection position, long-armed and galianconism equal in width,
The width of air groove is the 1/25 of long-armed width；The definition long-armed direction of detected sample piece is the direction x, and galianconism direction is y
Direction；
The B-H composite sensing coil includes H coil and four B probes, and H coil is divided into Hx coil and Hy coil, Hx coil and
For the perpendicular arranged crosswise of Hy coil on H coil substrate, the H coil substrate is mounted on the center of B probe substrate, in H coil
Four B probes, and four perpendicular arranged crosswises of B probe, four B probes to B probe are arranged on the B probe substrate of substrate peripheral
The distance of substrate center is equal, and the line of two opposite B probes is parallel with Hx coil or Hy coil；H coil and B probe into
The welding hole of row multiple twin outlet, H coil multiple twin outlet and B probe multiple twin outlet is arranged on B probe substrate；
B-H composite sensing coil is fixed at the center of detected sample piece upper surface；It is sticked at the center of tested print lower surface
First foil gauge, the second foil gauge, third foil gauge, three foil gauges respectively along x-axis, y-axis and with x-axis direction at 45 °
Three direction arrangements；
It is respectively arranged " c-type " magnetic yoke " c-type " magnetic yoke under in the upper and lower surface of tested print, and two " c-type " magnetic yokes are vertical
It places, the opening of c-type is opposite；Two leg portions of two " c-type " magnetic yokes wind field winding；
The multiple twin outlet of B-H composite sensing coil is both connected on the corresponding interface of level-one amplifying circuit, level-one amplifying circuit
Output end be connected to the respective input of capture card, capture card connects computer simultaneously, and magnetic measurement Virtual instrument is loaded in computer
Device workbench, capture card and computer carry out two-way communication, and the output end of the capture card is by power amplifier and corresponding water-cooled resistance
Series connection, then be connected on a pair of of field winding through corresponding isolating transformer；
It is separately connected a stress loading device on the long-armed and galianconism of tested print, each stress loading device is all connected with electricity
Brain controls two stress loading devices by the magnetic measurement virtual instrument workbench in computer, three be tested in sample surface
The lead-out wire of foil gauge is connected in the input terminal of capture card through lock-in amplifier.
2. the two-dimentional monolithic magnetic characteristic test macro under biaxial stress loading environment according to claim 1, feature exist
In four B probes to B probe substrate center distance be 12.5mm.
3. the two-dimentional monolithic magnetic characteristic test macro under biaxial stress loading environment according to claim 1, feature exist
In the width of air groove is 4mm, length 10mm.
4. the two-dimentional monolithic magnetic characteristic test macro under biaxial stress loading environment according to claim 1, feature exist
In air groove end is arc-shaped.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594144A (en) * | 2018-06-27 | 2018-09-28 | 河北工业大学 | Two-dimentional monolithic magnetic characteristic under biaxial stress loading environment tests system and method |
| CN110441720A (en) * | 2019-09-12 | 2019-11-12 | 河北工业大学 | It is a kind of fold direction apply stress improvement epstein frame |
| CN111208454A (en) * | 2020-01-09 | 2020-05-29 | 河北工业大学 | Hall-coil combined type three-dimensional magnetic characteristic measurement sensing box |
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2018
- 2018-06-27 CN CN201820996140.2U patent/CN208569012U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594144A (en) * | 2018-06-27 | 2018-09-28 | 河北工业大学 | Two-dimentional monolithic magnetic characteristic under biaxial stress loading environment tests system and method |
| CN108594144B (en) * | 2018-06-27 | 2024-01-19 | 河北工业大学 | Two-dimensional monolithic magnetic characteristic test system and method under bidirectional stress loading condition |
| CN110441720A (en) * | 2019-09-12 | 2019-11-12 | 河北工业大学 | It is a kind of fold direction apply stress improvement epstein frame |
| CN110441720B (en) * | 2019-09-12 | 2024-05-24 | 河北工业大学 | Improved epstein square ring for applying stress in stacking direction |
| CN111208454A (en) * | 2020-01-09 | 2020-05-29 | 河北工业大学 | Hall-coil combined type three-dimensional magnetic characteristic measurement sensing box |
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