CN1304848C - Horizontal magnetic coupler mechanical loading and measuring systems - Google Patents
Horizontal magnetic coupler mechanical loading and measuring systems Download PDFInfo
- Publication number
- CN1304848C CN1304848C CNB2004100427874A CN200410042787A CN1304848C CN 1304848 C CN1304848 C CN 1304848C CN B2004100427874 A CNB2004100427874 A CN B2004100427874A CN 200410042787 A CN200410042787 A CN 200410042787A CN 1304848 C CN1304848 C CN 1304848C
- Authority
- CN
- China
- Prior art keywords
- test specimen
- mentioned
- converter
- input end
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 118
- 238000011068 loading method Methods 0.000 title claims abstract description 56
- 238000002474 experimental method Methods 0.000 claims abstract description 27
- 230000008878 coupling Effects 0.000 claims abstract description 18
- 238000010168 coupling process Methods 0.000 claims abstract description 18
- 238000005859 coupling reaction Methods 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 89
- 239000000523 sample Substances 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 13
- 239000011888 foil Substances 0.000 claims description 12
- 230000001939 inductive effect Effects 0.000 claims description 9
- 230000003750 conditioning effect Effects 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000005728 strengthening Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 24
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000013001 point bending Methods 0.000 abstract description 2
- 230000005415 magnetization Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 13
- 230000006698 induction Effects 0.000 description 13
- 239000000696 magnetic material Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 230000035699 permeability Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000003302 ferromagnetic material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000005355 Hall effect Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000005690 magnetoelectric effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005352 galvanomagnetic phenomena Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The present invention relates to a horizontal force magnetic coupling mechanical loading and measuring system which belongs to the technical field of magnetic characteristic measurement. The present invention is characterized in that the present invention provides two types of systems of transverse loading and measurement in magnetic fields and the loading and the measurement of three-point bending and fracture experiments in magnetic fields. The present invention comprises a control part and a loading part, wherein the control part uses a digital control and measurement subsystem, and the loading part uses a motor or a manual transverse loading mechanism and a manual spiral type three point pressurizing fracture loading mechanism respectively. The present invention can realize the continuous loading of force magnetic coupling in magnetic fields and has the advantages of large force magnetic loads and high measuring precision.
Description
Technical field
The invention belongs to material magnetic parameter and feature measurement technical field thereof.
Background technology
At present, the magnetic characteristic measuring technique of magnetic material is ripe, and the commercialization of various magnetic determining device.But though the research of the power magnetic coupling behavior of magnetic material is made progress to some extent, there be not the experimental facilities and the instrument of corresponding research power magnetic coupling behavior.At R.Tickle, R.D.James (Journal of Magnetism and Magnetic Materials 195 (1999) 627-638) studies Ni
2In the article of MnGa magnetic and mechanical property, mentioned the equipment of research power magnetic coupling experiment, but the magnetic field intensity that this complete equipment can load is smaller, and its load charger precision is low, can not realize continuous loading, owing to use soft spring to load, the load that can load is also very little.The function that equipment set can be realized is also fewer, and Fig. 9 is the synoptic diagram of its loading.
Summary of the invention
The object of the present invention is to provide a kind of power magnetic rate of loading big, precision height, the horizontal power magnetic coupling mechanical load and the measuring system that can load continuously.
People just study the power magnetic coupling behavior of magnetic material from way back, and experiment finds that stress is one of key factor that influences the ferromagnetic material magnetic property.Along with the change of stress state, the coercive field of magnetic material, saturation magnetization, magnetic permeability, saturation magnetostriction, piezomagnetic coefficient all can change.Along with science and technology development, the application of magnetic material more and more widely, new magnetic material also continues to bring out, working environment also becomes increasingly complex.This just need carry out systematic research to the power magnetic coupling behavior of magnetic material, so we have developed horizontal power magnetic coupling mechanical load and measuring system.
Principle
The constitutive relation of ferromagnetic material can be expressed as under the quasistatic
ε
ij＝ε
ij(σ
ij，H
i) (1)
B
i＝B
i(σ
ij，H
i) (2)
σ wherein
IjBe stress, ε
IjBe strain, B
iBe magnetic induction density, H
iBe magnetic field intensity.By constitutive equation as can be seen, when independent variable was stress and magnetic field intensity, output quantity was strain and magnetic induction density, and then these four amounts are the fundamental quantities that must measure in experiment.By these four amounts, we can obtain reflecting the characteristic curve of ferromagnetic material character, as magnetic hysteresis loop, and the magnetostriction curve, stress-strain diagrams etc. further, by these basic characteristic curvees, can record important material parameter.
The measurement of magnetic field intensity
The measurement in magnetic field can be divided into according to different physical principles: power and moment method, inductive electromagnetic method, magnetoelectric effect method and resonant method.Adopt the magnetoelectric effect method during we measure, it is to utilize Hall effect, and is easy to use, and the precision height.The current-carrying semiconductor is positioned in the magnetic field,, then on the vertical direction of electric current, produces potential difference (PD) U if sense of current is vertical with magnetic direction
H, this phenomenon is called Hall effect.Hall electromotive force can be determined by following formula
R wherein
HBe Hall coefficient, I is the strength of current in the sample, and d is a thickness of sample, and B is a magnetic induction density.Be far smaller than 1 owing to have the magnetic susceptibility of Hall effect material, then B ≈ μ
0H, the substitution following formula can get magnetic field intensity
The measurement of magnetic induction density
According to the law of electromagnetic induction, when magnetic flux phi is passed the cross section with N circle coil and changed, can produce electromotive force U in the Δ t time
e, then can obtain flux change amount ΔΦ in the Δ t time to its integration
Original state when from t=0 is a reference point, and then magnetic induction density is expressed as
Stress measurement
Adopt force transducer
Strain measurement
The measurement of strain can be by flash ranging and electrical measuring method.Because having, electrical measurement uses simply, the characteristics that precision is high, and we adopt traditional strain gage testing strain.
The measurement of magnetic hysteresis loop
Magnetic hysteresis loop has three kinds of forms respectively: BH curve, M-H curve and J-H curve.Wherein there is following relation in magnetization M between magnetic polarization J and the magnetic induction density B
B=H+J=H+4 π M (Gauss's system) (7)
B=μ
0(H+M)=μ
0H+J (International System of Units) (8)
As long as know magnetization M, any one value in magnetic polarization J and the magnetic induction density B all can be obtained two other amount according to formula (7).In our experiment, adopt the J coil, promptly directly obtain the J value.
With the BH curve is example explanation hysteresis measurement principle.At first load by motor, make test specimen bear certain load, load can be passed through force sensor measuring.By D/A card control field power supply, add loaded magnetic field then, and utilize Hall plate to measure magnetic field intensity, and import the voltage signal that collects into the A/D card, simultaneously, obtain magnetic induction B value by coil, and import it into A/D card, write down this two groups of data automatically by computing machine, thereby obtain BH curve.
The measurement of magnetostriction curve
Magnetostriction during measurement is actually relative magnetostriction, is defined as follows:
λ＝ε
H-ε
H＝0 (9)
I.e. distortion when not applying magnetic field.When the magnetostriction under a certain stress σ of measurement, consider
ε
H＝0＝ε(σ) (10)
This moment ε
H=0The deformation that causes for simple stress σ.λ=ε under 0 stress state
H, magnetostriction promptly is the strain that records.
The measurement and the hysteresis measurement of magnetostriction curve are similar.At first load by motor, make test specimen bear certain load, load can be passed through force sensor measuring.By D/A card control field power supply, add loaded magnetic field then, and utilize foil gauge measurement magnetostriction and signal is introduced the A/D card, simultaneously, measure magnetic field intensity by Hall plate, and be introduced into the A/D card, automatically write down this two sets of curves by computing machine, obtain the magnetostriction curve.
Stress-strain diagram is measured
At first by D/A card control field power supply, add loaded magnetic field, load by motor then, make test specimen bear certain load, utilize strain gauge to obtain stress signal, obtain strain signal, simultaneously these two groups of signals are introduced the A/D card by resistance strain gage, by the automatic record of computing machine, thereby obtain stress-strain diagram.
The three-point bending line is measured
At first by D/A card control field power supply, be loaded into certain magnetic field, then by vertical loading device manual loading, make test specimen on 3 angle coupling tools, bear certain load until fracture, utilize strain gauge to obtain maximum breaking load, simultaneously signal is introduced the A/D card,, thereby obtained stress-strain diagram by the automatic record of computing machine.
The stress magnetization curve back
At first, be loaded into certain magnetic field, load by motor then by D/A card control field power supply, utilize strain gauge to obtain stress signal,, simultaneously signal is introduced the A/D card by the signal of J coil measurement magnetic induction, by the automatic record of computing machine, thereby obtain the stress magnetization curve back.
The measurement of stock parameter
The basic parameter of material can be from magnetization curve, and the magnetostriction curve obtains in the stress-strain diagram.Elastic modulus just can directly record from stress-strain diagram.
Magnetic permeability and magnetic susceptibility are defined as respectively
Because depending on, magnetic permeability and magnetic susceptibility loads history, thus can define different magnetic permeabilities according to the different application scope, as initial magnetic permeability, differential permeability etc.There is following relation between magnetic permeability and the magnetic susceptibility
μ＝1+x (12)
Coercive field H
c, remanent magnetization M
r, saturation magnetization is the important stock constant of ferromagnetic material, can record from the M-H curve.Provided instrumentation plan with Fig. 1.Then can measure coercive field H by BH curve
CbWith residual magnetic flux density B
r, note H
cAnd H
CbHave some difference.
Among Fig. 1, the x axle is a magnetic field intensity, and the y axle is the magnetization.Data acquisition is the point that disperses, and when calculating coercive field, gets two point (H of the most close zero magnetization
1, M
1) and (H
2, M
2), M wherein
1＜0 and M
2＞0.Because the field strength values that coercive field is the magnetization when being zero is so pass through (H
1, M
1) and (H
2, M
2) interpolation can get coercive field H
cFor hard magnetic material, certain slope when passing coercive field, magnetization curve is arranged, so coercive field H
cBe (H
1, M
1) and (H
2, M
2) value of M=0 correspondence on the line, can be expressed as
For soft magnetic material, when magnetization curve passes coercive field almost perpendicular to x axle, then M
1And M
2Almost equal, will cause overflowing according to the following formula numerical evaluation.So H
cCan be approximately 2 mid point
The measurement of remanent magnetization and coercive field are measured similar, get the two point (H in the most close zero magnetic field
1', M
1') and (H
2', M
2'), H wherein
1'＜0 and H '＞0
2, remanent magnetization can get
Measuring process
● parameter setting (sample area, length, the maximum field that need reach, the setting of magnetic field and magnetic strength range)
● preliminary work before the test (checks whether test specimen installs, whether gaussmeter, sensor return to zero, and whether strainmeter balance, and whether strain bridge is correct, whether foil gauge is normal, whether the fluxmeter drift is regulated, and whether Apc button (robotization gauge tap button) is pressed, and whether the button of integrator upsprings (after measuring beginning, these buttons are invalid), whether hall probe and J coil are installed correctly, and whether the cartridge position is adjusted, and whether displacement motor restriction is correct etc.)
Selecting to need to measure curve (magnetic hysteresis loop, magnetostriction curve etc.) begins to measure.
Horizontal power magnetic coupling mechanical load of the present invention and measuring system is characterized in that: it is laterally to load and measuring system under a kind of magnetic field, by control subsystem, and fluxmeter, gaussmeter, field power supply laterally loads subsystem and forms:
1) control subsystem is by industrial computer, A/D converter, and D/A converter, strain gauge, dynamic strain indicator is formed, wherein:
A/D converter, its input/go out end to interconnect with the control signal output ends of industrial computer, the input end of data-signal;
D/A converter, its input/go out end to interconnect with industrial computer control signal output ends, data-signal input end;
Strain gauge, its output terminal link to each other with the input end of above-mentioned A/D converter behind integrating circuit;
Dynamic strain indicator, its output terminal link to each other with the input end of above-mentioned A/D converter behind integrating circuit;
2) fluxmeter, its output terminal links to each other with the input end of above-mentioned A/D converter, and its range conditioning signal input end links to each other with the range control signal output ends of above-mentioned D/A converter;
3) gaussmeter, its output terminal links to each other with the data input pin of above-mentioned A/D converter, and its range conditioning signal input end links to each other with the range control signal output ends of above-mentioned D/A converter;
4) field power supply, its input end links to each other with the control signal output ends of above-mentioned D/A converter;
5) laterally load subsystem, by base, test specimen, inductive coil, foil gauge, hall probe, the D.C. magnetic field coil of charged magnet cartridge, guide rail, the horizontal load maintainer of test specimen is formed, wherein:
(a) inductive coil fixes on test specimen and with coil former vertically, and two output terminals link to each other with the input end of above-mentioned fluxmeter;
(b) foil gauge is attached on the test specimen vertically, and its output terminal links to each other with the input end of above-mentioned dynamic strain indicator;
(c) hall probe is fixed on the base with fixed mount, and the downside of the close test specimen in the position of probe, its two output terminal links to each other with above-mentioned gaussmeter input end;
(d) the D.C. magnetic field coil of charged magnet cartridge, totally two, by above-mentioned field power supply power supply, coil centerline is all coaxial with test specimen, and coil lays respectively at the base of the axial left and right sides of test specimen, produces the D.C. magnetic field of work alternate with each other;
(e) guide rail, is distributed in radially both sides of test specimen along the base length direction respectively, and is fixed on the base limit in the coil outside by totally two;
(f) the horizontal load maintainer of test specimen, be positioned at test specimen left side vertically, by the horizontal loading frame of test specimen, loading motor and manual loading wheel, transmission shaft, test specimen is the load plate in left side axially, and left chuck, test specimen laterally load adjusting mechanism, the strain type force transducer, the load plate on the axial right side of test specimen, right chuck and location-plate are formed, wherein:
The horizontal loading frame of √ test specimen is " Contraband " font, is positioned on two guide rails of radial side, is fixed with a loading frame between its two arms, in the strengthening frame left side displacement limiter that is fixed on an arm inboard of the horizontal loading frame of this test specimen is arranged;
The √ transmission shaft, an end and loading motor and manual loading wheel are coaxial, and are connected with the horizontal loading frame coaxial threaded of this test specimen and the other end is fixed on the strengthening frame through bearing slidably;
The √ test specimen is the load plate in left side axially, and it is fixed on the openend of horizontal loading frame two arms of this test specimen;
√ left side chuck, a side is fixed on the load plate in the axial left side of test specimen, and opposite side is axially clamped test specimen from left margin;
The √ test specimen laterally loads adjusting mechanism, is positioned at the axial right side of test specimen, comprising: adjust plate, totally two, lay respectively on the test specimen radial side guide rail;
√ strain type force transducer is fixed on and adjusts the side of plate in the face of test specimen;
The load plate on the axial right side of √ test specimen is fixed on the opposite side of strain type force transducer;
The right chuck of √, a side is fixed on the load plate on the axial right side of test specimen, and opposite side is axially clamped test specimen from left margin;
The √ location-plate, totally two, lay respectively on two guide rails of test specimen radial side, it and adjust between the plate opposite side adjusting play arranged.
Horizontal power magnetic coupling mechanical load of the present invention and measuring system is characterized in that, it is that following 3 the curved fracture experiments in a kind of magnetic field load and measuring system, by control subsystem, fluxmeter, gaussmeter, field power supply, 3 curved fracture experiments load subsystem to be formed, wherein:
1) control subsystem is by industrial computer, A/D converter, and D/A converter, strain gauge, dynamic strain indicator is formed, wherein
A/D converter, its input/go out end to interconnect with the control signal output ends of industrial computer, the input end of data-signal;
D/A converter, its input/go out end to interconnect with industrial computer control signal output ends, data-signal input end;
Strain gauge, its output terminal links to each other with the input end of above-mentioned A/D converter;
Dynamic strain indicator, its output terminal link to each other with the input end of above-mentioned A/D converter behind integrating circuit;
2) fluxmeter, its output terminal link to each other with the input end of above-mentioned A/D converter behind integrating circuit, and its range conditioning signal input end links to each other with the range control signal output ends of above-mentioned D/A converter;
3) gaussmeter, its output terminal links to each other with the data input pin of above-mentioned A/D converter, and its range conditioning signal input end links to each other with the range control signal output ends of above-mentioned D/A converter;
4) field power supply, its input end links to each other with the control signal output ends of above-mentioned D/A converter;
5) 3 curved fracture experiments load subsystem, by base, and test specimen, inductive coil, foil gauge, hall probe, the D.C. magnetic field coil of charged magnet cartridge, 3 curved fracture experiment load maintainers are formed, wherein:
(a) inductive coil fixes on test specimen and with coil former vertically, and two output terminals link to each other with the input end of above-mentioned fluxmeter;
(b) foil gauge is attached on the test specimen vertically, and its output terminal links to each other with the input end of above-mentioned dynamic strain indicator;
(c) hall probe is fixed on the base with fixed mount, and the downside of the close test specimen in the position of probe, its two output terminal links to each other with above-mentioned gaussmeter input end;
(d) the D.C. magnetic field coil of charged magnet cartridge, totally two, by above-mentioned field power supply power supply, coil centerline is all coaxial with test specimen, and coil lays respectively at the base of the axial left and right sides of test specimen, produces the D.C. magnetic field of work alternate with each other;
(e) 3 curved fracture experiment load maintainers, by fixed mount, transmission shaft, the strain type pressure transducer, 3 curved pressure heads, 3 curved loaded seat, 3 curved bearings that load, test specimen is formed, wherein:
The √ fixed mount is fixed on the above-mentioned base along the centerline direction of above-mentioned coil, and equidistant being clipped between the above-mentioned coil;
The √ transmission shaft, an end and coaxial a connection of manual pulley, and pass the said fixing frame coaxially;
√ strain type pressure transducer, its coaxial cable ground, upper surface and the interlocking of above-mentioned transmission shaft lower end;
3 curved pressure heads of √, the interlocking of the lower surface of its coaxial cable ground, upper surface and above-mentioned strain type pressure transducer simultaneously again by being threaded with being fixed on guide frame coaxial cable between said fixing frame two arms;
3 curved loaded seat of √ are fixed on the underframe of said fixing frame coaxial cable;
3 curved bearings that load of √ are fixed on the upper surface of above-mentioned 3 curved loaded seat coaxial cable;
The √ test specimen is clipped in above-mentioned 3 curved loadings in the bearing, and the center of upper surface heads on the top of above-mentioned 3 curved pressure heads, and respectively there is a bearing at test specimen face two ends, and these two bearings are fixed on the above-mentioned base.
Fig. 2 has provided each ingredient of experimental facilities in detail.Because this complete equipment not only carries out this structure experiment and also will carry out fracture experiment, for the requirement of satisfying us and make the measuring process robotization, developed the monitoring and the data acquisition software of measuring process voluntarily.Under the control of monitoring software, the ess-strain signal is introduced the A/D card by force transducer and dynamic strain indicator respectively, and magnetic field intensity and magnetic induction density are then introduced the A/D card by integrator conversion back.Computing machine is by the D/A card, and controlling magnetic field loads, and when magnetic field loaded, computing machine passed through the magnetic induction of A/D synchronous acquisition, the strain and stress signal, and handle automatically and record data.
By this complete equipment, can carry out comprehensively this structure experiment, can measure the magnetic hysteresis loop under the different stress, magnetostriction curve under the different stress, the stress-strain diagram under the different magnetic field intensity, the stress magnetization curve back under the different magnetic field intensity etc.
Description of drawings
Fig. 1. the magnetic parameter instrumentation plan.
Fig. 2. horizontal loading experiment equipment synoptic diagram:
1-loading motor 4-electromagnet 6-pressure head 7-cylindrical shape test specimen 8-hall probe 9-J coil 13-strain type force transducer 17-displacement limiter 20-foil gauge
Fig. 3. following 3 the curved fracture experiment equipment synoptic diagram in magnetic field:
3 laminar test specimens of curved bearing 28-of 4-electromagnet 8-hall probe 24-strain type force transducer 27-
Fig. 4. the acquisition principle synoptic diagram of signal.
Fig. 5. horizontal transverse force magnetic coupling mechanical mechanism cut-open view:
5a: longitudinal section; 5b: left side view; 5c: vertical view; 5d: enlarged drawing;
1. loading motor 2. manual loading wheel 3. horizontal loading frame 4. electromagnet 5. load plate 6. pressure heads 7. cylindrical shape test specimens 8. hall probe 9.J coils 10. strain type force transducers 11. are adjusted plate 12. hall probe fixed mounts 13. strain type force transducer output terminals 14. plant bottom cases 15. transmission shaft parts 16. strengthening frames 17. displacement limiter 18. guide rails 19. set bolts 20. foil gauges.
Fig. 6. the schematic block circuit diagram of control subsystem.
Fig. 7. 3 curved fracture experiment load maintainer cut-open views:
7a: longitudinal section; 7b: left side view; 7c: vertical view; 7d: enlarged drawing;
21. vertically load 27. 3 curved 29. 3 curved loaded seat of bearing 28. laminar test specimens that load of 26. 3 curved pressure heads of manual pulley 22. vertical fixed mount 23. transmission shafts 24. strain type force transducers, 25. guide frames
Fig. 8. empirical curve.
Fig. 9 .R.Tickle, the R.D.James load maintainer
30. support 31. test specimens 32. springs 33. specimen stages 34. nuts
Embodiment
(1) magnetic field generating apparatus
Magnetic field is produced by electromagnet by direct current.In order to have highfield and high precision simultaneously, designed two cover power supplys: the 1. small power supply by the transistor rectification, maximum output current 20A, peak power 2KW, when die opening is 80mm, maximum field can reach 0.4T, and the internal magnetic field fluctuation was less than 1% in 10 minutes; 2. the large power supply by silicon controlled rectifier, maximum output current 50A, peak power 15KW, when die opening is 80mm, maximum field can reach 1.2T, and the internal magnetic field fluctuation was less than 3% in 3 minutes.Use small power supply for general soft magnetic material, magnetic field is stable, the precision height.Greater than the magnetic material of 1T, can use large power supply for hard magnetic material or saturation field.
(2) magnetic-field-measuring device
Magnetic field intensity is measured by hall probe, and magnetic induction density is measured by coil, and this two-way original analog is introduced integrator, is converted to the simulating signal that the A/D card can directly be gathered.The A/D card is 14.
(3) mechanical load equipment
Designed horizontal loading and vertical loading equipemtn respectively, the loading of this both direction is displacement and loads, and vertically is by the turbine and worm transmission, and laterally loading is that the stepless speed regulation electrode loads.Laterally loading range is 1000 kgfs, and vertically loading range is 200 kgfs.
By vertical loading frame, pressure head and pedestal are installed, can realize 3 curved experiments.As shown in Figure 3.
(4) monitoring and collecting device
Whole experiment is loaded by D/A control power supply by computer control, gathers magnetic field intensity, magnetic induction density, signals such as stress and strain by A/D.As shown in Figure 4.
(1) D/A control module
| Figure place | Output voltage | Minimum resolution | The switching |
| 12 | 0-± | 1/2
12* | 12 |
(2) A/D collecting unit
| Figure place | Input voltage | Minimum resolution | The |
| 14 | 0-± | 1/2
14* | 8 |
(3) field power supply: MTP-500HB (small power supply)
| Output current | Output voltage | Power requirement |
| ±20A DC(Max) | ±100V DC(Max) | 220V，50/60Hz |
(4) field power supply: MTP-5000H (large power supply)
| Output current | Output voltage | Power requirement |
| ±50A DC(Max) | ±300V DC(Max) | The 380V electrical source of power |
The power supply characteristics: the realization current overload is protected the output of manual adjustments electric current automatically
(5) gaussmeter: TA101A (being used for H measures)
| Range (be provided with automatically and manually be provided with) | Gauge outfit shows | Repeatability | Accuracy |
| 0.4T，1.0T， 2.0T，4.0 | 31/2 numeral shows | 1% full scale | ± 1% full scale |
(6) fluxmeter: TA101A (being used for B measures)
| Range (be provided with automatically and manually be provided with) | Gauge outfit shows | Repeatability | Accuracy |
| 200,000,500,000,1,000,000,2,000,000 | 31/2 numeral shows | 1% full scale | ± 1% full scale |
(7) electromagnet
| Shape | Weight | The cartridge gap | Coil impedance | Serviceability temperature |
| Horizontal | About 1000kg | 0-110mm | 9Ω | Maximum 50 ℃ |
| Cartridge | Maximum field (small power supply) | Maximum field (large power supply) | ||
| φ 100 pure iron | (0.4T gap 80mm) | (1.2T gap 80mm) | ||
(8) JH-compensating coil (4)
| Coil dimension | Be fit to sample size | Coil thickness | Serviceability temperature | |
| φ6mm φ10mm φ10mm φ14mm | φ4-φ6 φ8-φ10 φ8-φ10 φ12-φ14 | 4mm 4mm | Maximum | 40 ℃ |
(9) dynamic strain indicator
Self-balancing bridge circuit, output voltage signal ± 10V
(10) force transducer (2)
A: 1 ton of range, precision 1N
B: range 100 kgfs, precision 0.1N
(11) adjustable speed motor and motor control box
Load range: 11000N
Loading transfer is steady: worm screw rotates a circle, and the loading head step-wise displacement is no more than 0.05mm.
Overload protection
(12) charger technical requirement:
To neutrality: less than 0.4mm
Maximum defluxion: less than 0.5mm
(13) charger material: adopt nonmagnetic substances such as stainless steel
The advantage of equipment and function: the magnetic field intensity height that horizontal power magnetic coupling mechanical load and measuring system can reach, the range of mechanical load is big and precision is high, and the loading of mechanical load use stepper motor, has realized continuous loading.All measuring-signal collections are finished whole measuring process robotization with processing by computer software.Experiments such as machinery loading device has two covers, can realize loading and experiments of measuring vertical with magnetic field and parallel both direction, and the anchor clamps of test specimen can change, and can finish stretching, and compression and 3 are curved.Can realize the magnetic hysteresis loop under the Different Loading Method different stress, the magnetostriction curve; Different Loading Method is without the stress magnetization curve back under the magnetic field intensity, stress-strain diagram; Can also carry out 3 curved experiments and the impression experiment under the different magnetic field intensity.And this complete equipment can also continue to develop many functions, such as closing the electric displacement meter, can measure the galvanomagnetic effect under the different stress, can also measure mangneto transformation curve under the different power magnetic coupling load or the like.And when measuring strain signal, the strain signal line adopts the magnetic shielding line, has eliminated the noise signal that magnetic field causes.Adopt the full bridge measurement strain, reduced the influence of moment of flexure.
Claims (2)
1. horizontal power magnetic coupling mechanical load and measuring system is characterized in that: it is laterally to load and measuring system under a kind of magnetic field, by control subsystem, and fluxmeter, gaussmeter, field power supply laterally loads subsystem and forms:
1) control subsystem is by industrial computer, A/D converter, and D/A converter, strain gauge, dynamic strain indicator is formed, wherein:
A/D converter, its input/go out end to interconnect with the control signal output ends of industrial computer, the input end of data-signal;
D/A converter, its input/go out end to interconnect with industrial computer control signal output ends, data-signal input end;
Strain gauge, its output terminal link to each other with the input end of above-mentioned A/D converter behind integrating circuit;
Dynamic strain indicator, its output terminal link to each other with the input end of above-mentioned A/D converter behind integrating circuit;
2) fluxmeter, its output terminal links to each other with the input end of above-mentioned A/D converter, and its range conditioning signal input end links to each other with the range control signal output ends of above-mentioned D/A converter;
3) gaussmeter, its output terminal links to each other with the data input pin of above-mentioned A/D converter, and its range conditioning signal input end links to each other with the range control signal output ends of above-mentioned D/A converter;
4) field power supply, its input end links to each other with the control signal output ends of above-mentioned D/A converter;
5) laterally load subsystem, by base, test specimen, inductive coil, foil gauge, hall probe, the D.C. magnetic field coil of charged magnet cartridge, guide rail, the horizontal load maintainer of test specimen is formed, wherein:
(a) inductive coil fixes on test specimen and with coil former vertically, and two output terminals link to each other with the input end of above-mentioned fluxmeter;
(b) foil gauge is attached on the test specimen vertically, and its output terminal links to each other with the input end of above-mentioned dynamic strain indicator;
(c) hall probe is fixed on the base with fixed mount, and the downside of the close test specimen in the position of probe, its two output terminal links to each other with above-mentioned gaussmeter input end;
(d) the D.C. magnetic field coil of charged magnet cartridge, totally two, by above-mentioned field power supply power supply, coil centerline is all coaxial with test specimen, and coil lays respectively at the base of the axial left and right sides of test specimen, produces the D.C. magnetic field of work alternate with each other;
(e) guide rail, is distributed in radially both sides of test specimen along the base length direction respectively, and is fixed on the base limit in the coil outside by totally two;
(f) the horizontal load maintainer of test specimen, be positioned at test specimen left side vertically, by the horizontal loading frame of test specimen, loading motor and manual loading wheel, transmission shaft, test specimen is the load plate in left side axially, and left chuck, test specimen laterally load adjusting mechanism, the strain type force transducer, the load plate on the axial right side of test specimen, right chuck and location-plate are formed, wherein:
The horizontal loading frame of √ test specimen is " Contraband " font, is positioned on two guide rails of radial side, is fixed with a loading frame between its two arms, in the strengthening frame left side displacement limiter that is fixed on an arm inboard of the horizontal loading frame of this test specimen is arranged;
The √ transmission shaft, an end and loading motor and manual loading wheel are coaxial, and are connected with the horizontal loading frame coaxial threaded of this test specimen and the other end is fixed on the strengthening frame through bearing slidably;
The √ test specimen is the load plate in left side axially, and it is fixed on the openend of horizontal loading frame two arms of this test specimen;
√ left side chuck, a side is fixed on the load plate in the axial left side of test specimen, and opposite side is axially clamped test specimen from left margin;
The √ test specimen laterally loads adjusting mechanism, is positioned at the axial right side of test specimen, comprising: adjust plate, totally two, lay respectively on the test specimen radial side guide rail;
√ strain type force transducer is fixed on and adjusts the side of plate in the face of test specimen;
The load plate on the axial right side of √ test specimen is fixed on the opposite side of strain type force transducer;
The right chuck of √, a side is fixed on the load plate on the axial right side of test specimen, and opposite side is axially clamped test specimen from left margin;
The √ location-plate, totally two, lay respectively on two guide rails of test specimen radial side, it and adjust between the plate opposite side adjusting play arranged.
2. horizontal power magnetic coupling mechanical load and measuring system is characterized in that, it is that following 3 the curved fracture experiments in a kind of magnetic field load and measuring system, by control subsystem, and fluxmeter, gaussmeter, field power supply, 3 curved fracture experiments load subsystem to be formed, wherein:
1) control subsystem is by industrial computer, A/D converter, and D/A converter, strain gauge, dynamic strain indicator is formed, wherein
A/D converter, its input/go out end to interconnect with the control signal output ends of industrial computer, the input end of data-signal;
D/A converter, its input/go out end to interconnect with industrial computer control signal output ends, data-signal input end;
Strain gauge, its output terminal links to each other with the input end of above-mentioned A/D converter;
Dynamic strain indicator, its output terminal link to each other with the input end of above-mentioned A/D converter behind integrating circuit;
2) fluxmeter, its output terminal link to each other with the input end of above-mentioned A/D converter behind integrating circuit, and its range conditioning signal input end links to each other with the range control signal output ends of above-mentioned D/A converter;
3) gaussmeter, its output terminal links to each other with the data input pin of above-mentioned A/D converter, and its range conditioning signal input end links to each other with the range control signal output ends of above-mentioned D/A converter;
4) field power supply, its input end links to each other with the control signal output ends of above-mentioned D/A converter;
5) 3 curved fracture experiments load subsystem, by base, and test specimen, inductive coil, foil gauge, hall probe, the D.C. magnetic field coil of charged magnet cartridge, 3 curved fracture experiment load maintainers are formed, wherein:
(a) inductive coil fixes on test specimen and with coil former vertically, and two output terminals link to each other with the input end of above-mentioned fluxmeter;
(b) foil gauge is attached on the test specimen vertically, and its output terminal links to each other with the input end of above-mentioned dynamic strain indicator;
(c) hall probe is fixed on the base with fixed mount, and the downside of the close test specimen in the position of probe, its two output terminal links to each other with above-mentioned gaussmeter input end;
(d) the D.C. magnetic field coil of charged magnet cartridge, totally two, by above-mentioned field power supply power supply, coil centerline is all coaxial with test specimen, and coil lays respectively at the base of the axial left and right sides of test specimen, produces the D.C. magnetic field of work alternate with each other;
(e) 3 curved fracture experiment load maintainers, by fixed mount, transmission shaft, the strain type pressure transducer, 3 curved pressure heads, 3 curved loaded seat, 3 curved bearings that load, test specimen is formed, wherein:
The √ fixed mount is fixed on the above-mentioned base along the centerline direction of above-mentioned coil, and equidistant being clipped between the above-mentioned coil;
The √ transmission shaft, an end and coaxial a connection of manual pulley, and pass the said fixing frame coaxially;
√ strain type pressure transducer, its coaxial cable ground, upper surface and the interlocking of above-mentioned transmission shaft lower end;
3 curved pressure heads of √, the interlocking of the lower surface of its coaxial cable ground, upper surface and above-mentioned strain type pressure transducer simultaneously again by being threaded with being fixed on guide frame coaxial cable between said fixing frame two arms;
3 curved loaded seat of √ are fixed on the underframe of said fixing frame coaxial cable;
3 curved bearings that load of √ are fixed on the upper surface of above-mentioned 3 curved loaded seat coaxial cable;
The √ test specimen is clipped in above-mentioned 3 curved loadings in the bearing, and the center of upper surface heads on the top of above-mentioned 3 curved pressure heads, and respectively there is a bearing at test specimen face two ends, and these two bearings are fixed on the above-mentioned base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100427874A CN1304848C (en) | 2004-05-28 | 2004-05-28 | Horizontal magnetic coupler mechanical loading and measuring systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100427874A CN1304848C (en) | 2004-05-28 | 2004-05-28 | Horizontal magnetic coupler mechanical loading and measuring systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1584621A CN1584621A (en) | 2005-02-23 |
| CN1304848C true CN1304848C (en) | 2007-03-14 |
Family
ID=34601672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100427874A Expired - Lifetime CN1304848C (en) | 2004-05-28 | 2004-05-28 | Horizontal magnetic coupler mechanical loading and measuring systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1304848C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101178385B (en) * | 2007-12-05 | 2010-09-29 | 南京航空航天大学 | Electric eddy nondestructive detection system based on foil gage |
| CN102621508A (en) * | 2012-04-24 | 2012-08-01 | 郭敏强 | Novel method for measuring magnetostriction coefficient |
| CN104198282A (en) * | 2014-08-14 | 2014-12-10 | 清华大学 | Force-magnetism-electricity multi-field coupling measuring system |
| CN105842635B (en) * | 2016-03-21 | 2018-10-12 | 北京工业大学 | Micro- magnetic probe excitation feedback based on linear extrapolation |
| CN106932741B (en) * | 2017-04-17 | 2023-10-24 | 沈阳工业大学 | Temperature and stress effect measuring device for vector magnetic characteristics of electrical steel sheet |
| CN107102279B (en) * | 2017-05-26 | 2019-06-11 | 东北石油大学 | A kind of magnetic strain measurement method |
| CN108020464B (en) * | 2017-10-24 | 2020-04-21 | 河北工程大学 | Method for calibrating uniformity degree of similar materials by using strain bricks |
| CN108760788B (en) * | 2018-05-30 | 2020-10-23 | 中国工程物理研究院核物理与化学研究所 | In-situ force-magnetic coupling experimental device and experimental method |
| CN110045305B (en) * | 2019-04-23 | 2021-10-08 | 同济大学 | Quasi-closed-circuit soft magnetic measuring instrument |
| CN111289606B (en) * | 2020-03-31 | 2023-06-02 | 西安工程大学 | Magnetic force effect stress detection system and method based on existing magnetism of structural steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2409518Y (en) * | 2000-03-03 | 2000-12-06 | 冶金工业部钢铁研究总院 | Measurer for quickly measuring magnetisability of soft magnetic material |
| JP2003194903A (en) * | 2001-12-28 | 2003-07-09 | Jfe Engineering Kk | Tensile force adding apparatus for measuring magnetism |
| US6597176B2 (en) * | 1997-11-21 | 2003-07-22 | Quantum Design, Inc. | Method and apparatus for making measurements of patterns of magnetic particles in lateral flow membranes and microfluidic systems |
| CN1456901A (en) * | 2003-06-09 | 2003-11-19 | 南京大学 | Soft magnetic material characteristic measuring devices |
-
2004
- 2004-05-28 CN CNB2004100427874A patent/CN1304848C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6597176B2 (en) * | 1997-11-21 | 2003-07-22 | Quantum Design, Inc. | Method and apparatus for making measurements of patterns of magnetic particles in lateral flow membranes and microfluidic systems |
| CN2409518Y (en) * | 2000-03-03 | 2000-12-06 | 冶金工业部钢铁研究总院 | Measurer for quickly measuring magnetisability of soft magnetic material |
| JP2003194903A (en) * | 2001-12-28 | 2003-07-09 | Jfe Engineering Kk | Tensile force adding apparatus for measuring magnetism |
| CN1456901A (en) * | 2003-06-09 | 2003-11-19 | 南京大学 | Soft magnetic material characteristic measuring devices |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1584621A (en) | 2005-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1175257C (en) | Load sensor | |
| CN1304848C (en) | Horizontal magnetic coupler mechanical loading and measuring systems | |
| CN1530072A (en) | Nuclear magnetic resonance imager and nuclear magnetic resonance imaging method | |
| CN1155998C (en) | Thin slice resistance measurer and electronic part mfg. method | |
| CN1039483A (en) | Magnetostrictive torque sensor | |
| Calkins et al. | Effect of prestress on the dynamic performace of a Terfenol-D transducer | |
| EP1361455A3 (en) | Supersensitive nuclear magnetic resonance imaging apparatus | |
| CN106597329B (en) | automatic change magnetic-electric coefficient test system | |
| CN1636508A (en) | Magnetic resonance imaging apparatus and magnetic resonance imaging method | |
| CN111947872B (en) | Platform and method for testing vibration characteristics of reactor iron core material | |
| CN101053516A (en) | Electric field control device and detection device | |
| CN1584624A (en) | Magnetic resonance imaging apparatus and method | |
| CN1233485C (en) | Bending machinery and its running method | |
| Xie et al. | A bridge-type inductance sensor with a two-stage filter circuit for high-precision detection of metal debris in the oil | |
| Wang et al. | Review of modern instrumentation for magnetic measurements at high pressure and low temperature | |
| Ding et al. | 2-D magnetic properties measurement system for electrical steel sheets considering laminated direction mechanical stress | |
| CN1333874A (en) | Apparatus and method for remote current sensing | |
| Wang et al. | Quantitative characterization of tensile stress in electroplated nickel coatings with a magnetic incremental permeability sensor | |
| Toutsop et al. | Characterization of tensile stress-dependent directional magnetic incremental permeability in iron-cobalt magnetic sheet: Towards internal stress estimation through non-destructive testing | |
| CN116047382A (en) | Cold atom chip magnetic field signal detection device and detection method | |
| CN1031770C (en) | Measuring apparatus and method for austenite content in steel parts | |
| US3470732A (en) | Dynamic viscoelastometer | |
| EA016899B1 (en) | Device for determining hardness | |
| CN1278648C (en) | Radio-frequency pulse tuning method and device | |
| CN206399724U (en) | Possesses the portable press-in test system of in-situ observation and follow-on test function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070314 |
|
| CX01 | Expiry of patent term |