CN105548343B - Detection method based on maglev part defect - Google Patents
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- 238000001514 detection method Methods 0.000 title claims abstract description 80
- 230000007547 defect Effects 0.000 title claims abstract description 63
- 230000005291 magnetic effect Effects 0.000 claims abstract description 56
- 230000006698 induction Effects 0.000 claims abstract description 15
- 230000005408 paramagnetism Effects 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 49
- 239000000463 material Substances 0.000 claims description 19
- 239000007864 aqueous solution Substances 0.000 claims description 13
- 229910021380 Manganese Chloride Inorganic materials 0.000 claims description 9
- 239000011565 manganese chloride Substances 0.000 claims description 9
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 claims description 7
- 230000002950 deficient Effects 0.000 claims description 7
- 229940099607 manganese chloride Drugs 0.000 claims description 7
- 235000002867 manganese chloride Nutrition 0.000 claims description 7
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- MEANOSLIBWSCIT-UHFFFAOYSA-K gadolinium trichloride Chemical compound Cl[Gd](Cl)Cl MEANOSLIBWSCIT-UHFFFAOYSA-K 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 3
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- 238000010586 diagram Methods 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/825—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by using magnetic attraction force
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Abstract
The invention discloses a kind of detection device and method based on maglev part defect, comprising: two magnet of vertical direction coaxial arrangement, two magnet homopolarities are oppositely arranged, and the magnetic induction intensity in the magnetic pole surfaces is identical；It is arranged between two magnet and has the detection container of setting-out mouth, is contained with paramagnetism medium solution in the detection container；The detection device is the sample of center symmetrical structure for cross section, and height of specimen is not more than the 3/4 of section maximum gauge, and the magnetic susceptibility of sample is less than 1 × 10‑5.Compared with prior art, the beneficial effects of the present invention are: test method of the present invention is easy to operate, operator is required not harsh, and detection device overall structure of the invention is simple, low in cost, test result is easy to observe, detection sensitivity is high, it is easy to accomplish automation.
Description
Technical field
The invention belongs to components defects detection fields, are specifically related to a kind of detection based on maglev part defect
Device and detection method.
Background technique
High molecular material is a kind of widely used material, is permeated in the every nook and cranny of our production and living.Manually closing
Before macromolecule product, people mainly make the application of high molecular material to the direct use of natural material or simple processing
With.Until the thirties in last century, the progress of polymer science is so that synthesis macromolecule may be implemented to industrialize, and high molecular material is
Fast development is entered to period.High molecular material is synthesized due to the diversification of its own raw material type and point that can be obtained
The diversification of minor structure allows synthesis high molecular material to obtain the characteristic of suitable engineer application.In general, macromolecule material
Expect that opposite traditional engineering materials all have density low, higher than strong, insulation, the characteristics such as absorbing obtain it in engineer application extensively
General application prospect, and can gradually replace some traditional materials.
Plastics and rubber are two class materials most widely used in high molecular material.The main manufacture of plastic products at present
For injection molding manufacture.Due to the characteristic of material itself and the influence of inappropriate technological parameter, it is easy to appear heat for plastic products
The defects of contracting, stomata, internal structure is uneven.Detection for plastic products, appearance detection rely primarily on people's naked eyes and detect, carefully
The appearance of small part is detected with greater need for equipment such as microscopes, and testing result does not only rely on instrument detection accuracy, to testing staff
Experience level also there are certain requirements.And the detection for internal flaw, then generally require complicated and expensive detection method.When
When needing non-destructive testing, need that (such as application No. is 201410802185.8 patent documents to disclose one using supersonic sounding
Kind laser melting coating remanufactures part defect type ultrasound analysis method, and this method is popped one's head in more using different size ultrasonic longitudinal wave
The secondary flaw echoes that arrive of acquisition scanning, then obtain most red defect situation by Signal Analysis System and observation), laser
Detection (such as application No. is the patent documents of CN201410241352.6 to disclose a kind of part quality defect detector and utilization
The method that the detector is detected is controlled the operation of each stepper motor by PLC control system, drives the laser on detector
Sensor scans part, transmits data to PLC control system, and the data being collected into are passed to computer, will by computer
The data of the data and Computer Database Plays part that scan carry out error comparative analysis, detect underproof zero
Part) or X-ray detection.When high testing cost makes the above detection technique be applied to plastic products detection, it can significantly improve
The cost of plastic products.
Miniature circular section plastic part is a kind of plastics very common in plastic part, most of revolving meber, sealing element
And function part all has this category feature.It is common such as plastic gear, plastic seal ring, plastic washer, plastic optical lens
Deng.Therefore applicable detection method is as described above, have that detection process is cumbersome, the high disadvantage of testing cost.
Summary of the invention
The present invention is theoretical based on magnetic suspension aiming at the problem that existing detection mode, proposes a kind of based on maglev zero
The detection device of part defect, the detection device overall structure is simple, uses simplicity.
Invention also provides a kind of detection methods based on maglev part defect, can be quick using this method
Detect that detection efficiency and precision are high, practical with the presence or absence of external or internal flaw in sample.
A kind of detection device based on maglev part defect, comprising:
Two magnet of vertical direction coaxial arrangement, two magnet homopolarities are oppositely arranged, and the magnetic in the magnetic pole surfaces
Induction is identical；
It is arranged between two magnet and has the detection container of setting-out mouth, is contained with paramagnetism medium in the detection container
Solution；
The detection device is the sample of center symmetrical structure for cross section, and height of specimen is not more than cross-sectional maximum dimension
3/4, and the magnetic susceptibility of sample is less than 1 × 10-5。
Height of specimen is not more than the 3/4 of cross-sectional maximum dimension, and for the sample of circular cross section, cross-sectional maximum dimension is
Diameter prevents sample to be flipped, the judgement of interference detection results.The detection container is not by having ferromagnetic material
It is made, avoids its adverse effect to testing result.
For detected sample, flawless sample should be symmetrical and even density sample, detects in a device
When, it should be at keeping the posture of certain height z and holding level in corresponding density gradient.
Preferably, the magnetic induction intensity that the magnet is oppositely arranged magnetic pole surfaces is 0.3T~0.6T.
Preferably, the vertical range between two magnet homopolarities is 40~45mm.
Preferably, the medium solution is ferric chloride in aqueous solution, manganese chloride aqueous solution or gadolinium chloride aqueous solution.
As further preferred, the medium solution is manganese chloride aqueous solution, the molar concentration of manganese chloride aqueous solution is 1~
5mol/L.At this point, its density is about 1.0~1.3g/cm3；Magnetic susceptibility is about 1.7~5.5, can meet most of plastic, rubber sample
The detection of product.
Preferably, it is circular high molecular material that sample, which is cross section,.Such as can be detected with rubber seal, it can
PMMA lenses are detected etc..
Preferably, the detection container is transparent vessel.The detection container is made by not having ferromagnetic material,
Avoid its adverse effect to testing result.Equally, detector lens can also be set in opaque detection container as needed
Deng can realize the detection to sample state by external display.It as a further improvement, can be by connecting with computer
It connects, realizes automatic identification.
The present invention also provides a kind of detection methods based on maglev part defect, using any of the above-described technical solution
The device, the specific steps are as follows:
(1) different according to sample to be tested material, suitable medium solution is configured, guarantees that sample to be tested is placed in medium solution
When middle, it can swim in medium solution, medium solution is then placed in detection container；
(2) sample to be tested is placed in the medium solution of detection container；
(3) detection container with sample to be tested is placed between described two magnet；
(4) after sample to be tested is stablized, the posture of observation sample to be tested in the solution determines defect type in sample
And defective locations.
To further increase detection accuracy, preferably, any coordinate system can be constructed before sample to be tested detection, it should
The Z-direction of coordinate system is parallel with two magnet axis directions or is overlapped, and X-axis and Y axis be on horizontal plane, according to step (2)~
(4) standard sample is detected, determines the coordinate value at standard sample center, the standard coordinate value to get standard samples, and
Horizontal plane where standard coordinate value, the horizontal plane are index plane.In the present invention, the standard sample being previously mentioned refers to internal, outer
The equal zero defect in portion is sample.
Preferably, the posture of observation sample to be tested in the solution in step (4), determines defect type in sample and lacks
Fall into position, specifically: first determine whether sample to be tested centre coordinate and across centre coordinate the plane of symmetry whether with standard coordinate
Value is corresponding with index plane: if it does correspond, then illustrating test sample zero defect；If do not corresponded to, illustrate that test sample is defective.
As further preferred, specifically the step of are as follows:
When sample to be tested centre coordinate is overlapped with standard coordinate value, but when itself run-off the straight, then the sample interior
Existing defects；Defect is typically in the side of run-off the straight；
When the plane of symmetry across centre coordinate of sample to be tested is overlapped with index plane, but centre coordinate deviates
When, then illustrate the sample exterior existing defects；Defect is typically in the side of translation direction；
When the centre coordinate of sample to be tested is identical as standard coordinate value x, y, i.e., on the axis in two magnet, and
The plane of symmetry across centre coordinate is parallel with index plane coincidence, and when not being overlapped, then illustrates that the sample interior has symmetrical lack
It falls into.
The above-mentioned part lossless detection method based on magnetic levitation system of the present invention, the principle is as follows: two pieces of homopolarities are opposite, table
The identical strong magnet of face magnetic induction intensity, Surface field intensity are all B0On the line (we are referred to as " axis ") of magnetic blow out centre
It can generate from-B0To B0Linear magnetic induction intensity gradient.Magnetic field on upper and lower two magnet centerlines lineIt is distributed as
Wherein, B0For magnet surface magnetic induction intensity, Bx、By、BzRespectively point of the magnetic induction intensity in x, y, z axis direction
Amount, d distance between two magnet.Paramagnetic compounds solution (medium solution) if it exists between two blocks of magnet, then magnetic field can be to solution
In the very low substance of diamagnetic substance or magnetic susceptibility generate the power along magnetic induction line direction, expression formula is as follows:
In formula:It is the power that magnetic field generates, χsIt is the magnetic susceptibility of tested sample, χmIt is the magnetic susceptibility of medium solution,
μ0For space permeability, V is sample volume,For gradient operator.According to magnetic suspension theory, in any position in magnetic field
Sample suffered by magnetic field force x, y-axis direction component resultant force be directed toward two magnet centerlines, for no defect quilt
Object is surveyed, final balance position will be in two magnet centerlines.Equilibrium equation are as follows:
ρ in formulasFor sample rate, ρmFor solution density,For acceleration of gravity.Normally, measured matter is diamagnetism
Substance or magnetic susceptibility are very low, and magnetic susceptibility can be ignored.
The imperfect defect of sample appearance destroys the symmetrical shape of sample, but unequal to the density of sample entirety
Even property and local density's uniformity have an impact.In most cases, defect mostly occurs in sample edge position, when defect sample
When being in normal specimens (standard sample) equilbrium position, defect part can not balance its symmetrical region in XOY because of material deficiency
Suffered magnetic field force, sample can be pushed to the imperfect direction of shape in plane, and when being finally reached new equilbrium position, show as
There is deviation in sample original center and magnetic field center line.
Sample internal flaw causes the density uniformity in region to change.The density uniformity of defect area becomes
Change, leads to region χsWith ρsVariation.When defect sample is in the equilbrium position of normal specimens, compared with normal specimens, defect
The variation that buoyancy suffered by part and gravity resultant force are generated due to density uniformity.This variation leads to magnetic field force and gravity in region
The torque not rebalancing that buoyancy resultant force generates, deflects so as to cause sample.Under normal conditions, defect generates position, ρsBecome
It is small, therefore the region will appear the phenomenon that upward deflecting.Under extreme case, the internal flaw of sample is about sample center pair
Claim, shows as water product posture in the solution, but due to internal existing defects, sample ensemble average density changes, defect
The balance height z ' of sample is higher than zero defect Sample equilibration height z.
The detection of detection device and detection method of the invention particularly suitable for circular cross-section plastic part defect, it is actually detected
In the process, the density of product should be estimated according to product material before detection, while configures corresponding medium solution.Such as need essence
Solution magnetization rate is really calculated, solution magnetization rate can be measured with Gu Aifa.By adjusting density size, realize close to medium solution
The adjustment of degree and magnetic susceptibility.
In the present invention, medium solution can generate corresponding power to the diamagnetic substance being placed in solution under magnetic fields,
The size of power is related to magnetic induction intensity and solution magnetization rate.The magnetic induction of linear change can be generated between the opposite magnet of magnetic pole
Intensity gradient, the power generated in the solution also show as linear gradient.Inside and outside this method detection circular cross-section plastic part
Portion's defect, advantage are the convenience and low cost of non-destructive testing and the detection to circular cross-section plastic part.
Compared with prior art, the beneficial effects of the present invention are: test method of the present invention is easy to operate, operator is required
Not harsh and of the invention detection device overall structure is simple, low in cost, and test result is easy to observe, and detection sensitivity is high,
It is easy to automate.
Detailed description of the invention
Fig. 1 is the schematic view of the front view of the detection device of the invention based on maglev part defect.
Fig. 2 is the present invention looks up structural representation of the detection device of the invention based on maglev part defect.
Fig. 3 is the schematic view of the front view that the present invention is used for the imperfect defects detection of small size plastic optical lens appearance.
Fig. 4 is the present invention looks up structural representation of attached drawing shown in Fig. 3.
Fig. 5 is the schematic view of the front view that the present invention is used for small size plastic optical lens Inner Defect Testing.
Fig. 6 is the present invention looks up structural representation of attached drawing shown in Fig. 5.
Specific embodiment
To be more clearly understood the present invention, below according to specific example and attached drawing of the invention, the present invention is carried out
Further instruction.
It as depicted in figs. 1 and 2, is magnetic levitation system schematic diagram of the invention, including magnet 1, magnet 4, medium solution 2,
Sample 3, detection container 5.It is coaxially disposed on magnet 1,4 vertical direction of magnet, and homopolarity is oppositely arranged, in Fig. 1, two magnet
The pole N is oppositely arranged, towards detection container.
Detection container 5 is the transparent vessel of upper opening, and glass, the materials such as plastics generally can be used.
Magnet 1, magnet 4 are identical in the magnetic induction intensity of N pole surface, generally 0.3T~0.6T, in the present embodiment, magnet
1, magnet 4 is 0.5T in the magnetic induction intensity of N pole surface.The distance between magnet 1, magnet 4N pole surface are d, and d is generally 40
~45mm, in the present embodiment, d value is 45mm, be magnetic induction intensity at two magnetic blow out centre line height d/2 is 0T.
Medium solution 2 selects molar concentration for the ferric chloride in aqueous solution, manganese chloride aqueous solution or gadolinium chloride of 1~5mol/L
Aqueous solution.In the present embodiment, the medium solution 2 that selects for 2.5M MnCl2Solution, the relationship of concentration and density and magnetic susceptibility
It is as shown in table 1:
Table 1 is various concentration MnCl2Density corresponding to solution and magnetic susceptibility.
| Concentration (mol/L) | Density (g/cm3) | Magnetic susceptibility |
| 1 | 1.099 | 1.774×10-4 |
| 1.5 | 1.148 | 2.771×10-4 |
| 2 | 1.196 | 3.724×10-4 |
| 2.5 | 1.244 | 4.650×10-4 |
| 3 | 1.292 | 5.438×10-4 |
It is found that it can be by adjusting MnCl by table 12The concentration of solution realizes the adjustment to its density and magnetic susceptibility.
Detection device is the sample of center symmetrical structure for cross section, and height of specimen is not more than the 3/ of section maximum gauge
4, sample run-off the straight is prevented, the magnetic susceptibility of sample is less than 1 × 10-5.PMMA lens are detected using method of the invention,
The sample 3 is 10 × 3.0 biconvex lens of Φ, is diamagnetic substance.
In the present embodiment, the magnetic suspension detection method of circular arc interface plastic part, comprising:
(1) sample density is estimated according to sample material.
The medium solution of suitable concentration is configured, molar concentration 2.5M guarantees that sample can float in the solution.It configures
After medium solution, it is poured into detection container.
Before testing can be right, it can configure the medium solution that concentration is every liter of integer mole, carry out density and magnetic susceptibility
Calibration, according to the sample rate of estimation, can immediately arrive at the concentration of the medium solution needed to configure.
Under normal circumstances, in suitable range, solution density is slightly less than sample density.
(2) sample to be tested is placed in medium solution.
(3) medium solution is placed among two in magnetic suspension detection device magnet.
(4) observation tested sample position in the solution and posture.
Any coordinate system can be constructed before sample to be tested detection, Z-direction is parallel with two magnet axis directions or again
It closes, standard sample is detected according to step (2)~(4), the coordinate value at standard sample center is determined, gets standard samples
Horizontal plane where standard coordinate value and standard coordinate value, the horizontal plane are index plane.In standard sample herein refers to
Portion, external zero defect are acceptable lens.Acceptable lens are placed in device, and center should be located on magnetic field center line,
Posture should keep horizontal with horizontal plane, and the central horizontal plane of symmetry is located on index plane.Levitation height is mark to sample in the solution
Quasi- height Z.
The posture of observation sample to be tested in the solution, determines defect type and defective locations in sample in step (4), has
Body are as follows: first determine whether sample to be tested centre coordinate and across centre coordinate the plane of symmetry whether with standard coordinate value and index plane
It is corresponding: if it does correspond, then illustrating test sample zero defect；If do not corresponded to, illustrate that test sample is defective.
Specifically the step of are as follows:
When sample to be tested centre coordinate is overlapped with standard coordinate value, but when itself run-off the straight, then the sample interior
Existing defects；Defect is typically in the side of run-off the straight；
When the plane of symmetry across centre coordinate of sample to be tested is overlapped with index plane, but centre coordinate deviates
When, then illustrate the sample exterior existing defects；Defect is typically in the side of translation direction；
When the centre coordinate of sample to be tested is identical as standard coordinate value x, y, i.e., on the axis in two magnet, and
The plane of symmetry across centre coordinate is parallel with index plane coincidence, and when not being overlapped, then illustrates that the sample interior has symmetrical lack
It falls into.
Fig. 3 and Fig. 4 is that lens specimen detects the imperfect defect schematic diagram of appearance, and wherein defective locations are A.Outside lens
It sees imperfect defect and shows as two magnetic blow out centre lines of lens centre deviation in a device, offset direction is that defect generates direction,
Deviation distance size depends on defect size.
Fig. 5 and Fig. 6 is that lens specimen detects internal flaw schematic diagram, and wherein defective locations are B.The internal flaw of lens is drawn
It is uneven to play lens interior Density Distribution, shows as lens and deflects in a device, upward deflecting direction is defect generation side
To deflection angle size depends on defect size.
The foregoing is merely an application example of the invention, the not restrictions to sample range is applicable in.It can apply
The part that the present invention measures, there is no need and unable to exhaustive one by one, it is all within spirit of that invention and principle, done any repair
Change, equivalent replacement, improve etc., it should be included within the scope of the present invention.
Claims (5)
1. a kind of detection method based on maglev part defect, which is characterized in that realize the detection dress of the detection method
It sets and includes:
Two magnet of vertical direction coaxial arrangement, two magnet homopolarities are oppositely arranged, and the magnetic induction in the magnetic pole surfaces
Intensity is identical；
It is arranged between two magnet and has the detection container of setting-out mouth, it is molten to be contained with paramagnetism medium in the detection container
Liquid；
The detection device is the sample of center symmetrical structure for cross section, and height of specimen is not more than the 3/ of cross-sectional maximum dimension
4, and the magnetic susceptibility of sample is less than 1 × 10-5；
The magnetic induction intensity of the magnetic pole surfaces is 0.3T~0.6T；
Vertical range between two magnet homopolarities is 40~45mm；
Specific step is as follows for the detection method:
(1) different according to sample to be tested material, suitable medium solution is configured, guarantees that sample to be tested is placed in medium solution
When, it can swim in medium solution, medium solution is then placed in detection container；
(2) sample to be tested is placed in the medium solution of detection container；
(3) detection container with sample to be tested is placed between described two magnet；
(4) after sample to be tested is stablized, the posture of observation sample to be tested in the solution determines defect type in sample and lacks
Fall into position；
Before sample to be tested detection, any coordinate system is constructed, the coordinate system Z-direction is parallel with two magnet axis directions or again
It closes, X-axis and Y-axis are on horizontal plane, detect according to step (2)~(4) to standard sample, determine standard sample center
Coordinate value, the horizontal plane where the standard coordinate value and standard coordinate value that get standard samples, the horizontal plane are index plane；
The posture of observation sample to be tested in the solution, determines defect type and defective locations in sample, specifically in step (4)
Are as follows: when sample to be tested centre coordinate is overlapped with standard coordinate value, but when itself run-off the straight, then the sample interior, which exists, lacks
It falls into；Defect is in the side of run-off the straight；
When the plane of symmetry across centre coordinate of sample to be tested is overlapped with index plane, but centre coordinate deviates, then
Illustrate the sample exterior existing defects；Defect is in the side of translation direction；
When the centre coordinate of sample to be tested is identical as standard coordinate value x, y, i.e., on the axis in two magnet, and pass through
The plane of symmetry of centre coordinate is parallel with index plane coincidence, and when not being overlapped, then illustrating the sample interior, there are symmetrical defects.
2. the detection method according to claim 1 based on maglev part defect, which is characterized in that the medium is molten
Liquid is ferric chloride in aqueous solution, manganese chloride aqueous solution or gadolinium chloride aqueous solution.
3. the detection method according to claim 1 based on maglev part defect, which is characterized in that the medium is molten
Liquid is manganese chloride aqueous solution, and the molar concentration of manganese chloride aqueous solution is 1~5mol/L.
4. the detection method according to claim 1 based on maglev part defect, which is characterized in that sample is transversal
Face is circular high molecular material.
5. the detection method according to claim 1 based on maglev part defect, which is characterized in that the detection is held
Device is transparent vessel.
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| CN201510909832.XA CN105548343B (en) | 2015-12-10 | 2015-12-10 | Detection method based on maglev part defect |
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| CN201510909832.XA CN105548343B (en) | 2015-12-10 | 2015-12-10 | Detection method based on maglev part defect |
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| CN106568680B (en) * | 2016-06-14 | 2019-01-29 | 浙江大学 | Magnetic suspension detection method for detection density |
| CN106568681B (en) * | 2016-06-14 | 2019-06-11 | 浙江大学 | A kind of accurate measurement method of diamagnetic substance density |
| CN106568677B (en) * | 2016-07-22 | 2019-06-11 | 浙江大学 | One kind being based on magnetic Archimedes principle density measuring method |
| CN106568683B (en) * | 2016-07-22 | 2019-06-11 | 浙江大学 | It is a kind of for detecting the magnetic suspension detection method of crystallinity |
| CN106569157B (en) * | 2016-08-22 | 2019-05-24 | 浙江大学 | It is a kind of for detecting the magnetic suspension detection device and detection method of magnetic susceptibility |
| CN107807142A (en) * | 2017-10-26 | 2018-03-16 | 北京航空航天大学 | A kind of measuring system and measuring method of solid impurities concentration |
| CN108956754B (en) * | 2018-06-06 | 2020-06-09 | 浙江大学 | Plastic part defect detection method based on magnetic suspension device |
| EP3857574A4 (en) | 2018-09-28 | 2022-06-29 | President and Fellows of Harvard College | Magnetic levitation |
| CN110376274B (en) * | 2019-06-26 | 2021-06-04 | 浙江大学 | Magnetic suspension detection method and device for shrinkage cavity defect of aluminum alloy part |
| CN112129829B (en) * | 2020-09-21 | 2022-11-18 | 上海交通大学 | Flow type defect detection method based on diamagnetic suspension principle |
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| US9322804B2 (en) * | 2010-11-29 | 2016-04-26 | President And Fellows Of Harvard College | Quality control of diamagnetic materials using magnetic levitation |
| CN102788839B (en) * | 2011-05-16 | 2016-02-24 | 南车戚墅堰机车车辆工艺研究所有限公司 | Magnetic or magnetic suspension display capability tester |
| CN102830156A (en) * | 2012-08-31 | 2012-12-19 | 爱德森（厦门）电子有限公司 | On-line dynamic real-time monitoring method and apparatus for magnetic suspension concentration |
| CN103335926B (en) * | 2013-06-27 | 2015-04-22 | 南车戚墅堰机车车辆工艺研究所有限公司 | Method for measuring concentration of magnetic suspension for magnetic powder inspection |
| CN103499636B (en) * | 2013-10-11 | 2016-04-13 | 中国科学院大学 | Based on the lossless detection method of microdefect in the thin plate class ferromagnetic material of the magnetostatic power of survey |
| CN103713041B (en) * | 2013-12-06 | 2016-11-02 | 中铁宝桥（南京）有限公司 | The depth measurement device of ferrimagnet surface opening microdefect and measuring method |
| CN104007405A (en) * | 2014-05-19 | 2014-08-27 | 东北大学 | Magnetic susceptibility measuring device and method based on magneto-Archimedes levitation |
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