CN207318413U - A kind of sensor of metal weldment carrying out flaw detection - Google Patents
A kind of sensor of metal weldment carrying out flaw detection Download PDFInfo
- Publication number
- CN207318413U CN207318413U CN201721189050.4U CN201721189050U CN207318413U CN 207318413 U CN207318413 U CN 207318413U CN 201721189050 U CN201721189050 U CN 201721189050U CN 207318413 U CN207318413 U CN 207318413U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- magnetic field
- externally
- magneto
- imaging device
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of sensor of metal weldment carrying out flaw detection, field generator for magnetic including producing externally-applied magnetic field, the magnetic direction of externally-applied magnetic field changes over time in the section to be measured of metal weldment, it whether there is crack so as to detect metal section to be measured on each different direction, after receiving the polarization light processing for passing through the magnetic rotation dieletric reflection in externally-applied magnetic field by imaging device again, the magneto optic images are generated, by information sharpening, visualization the defects of metal weldment.The utility model can more accurate the defects of clearly detecting metal weldment information, improve the availability of testing result.
Description
Technical field
Metal defect detection detection field is the utility model is related to, more particularly to a kind of sensor of metal weldment flaw detection.
Background technology
Welding technique is the important processing technology of manufacture field, has severe operating condition, heavy workload and quality
It is required that the features such as high, due to the influence of the various random factors in welding process, workpiece can crack, stomata, slag inclusion
Deng weld defect.Crackle is most common in metal material, and to part destructiveness it is most strong the defects of, in order to ensure metal
Weldment product quality, it is necessary to timely and effective to detect weld defect.
In recent years, the method for common detection metal weldment defect, such as magnetic powder detection method can be the measured workpiece the defects of
Place produces the irregular magnetic line of force, so that defect is shown, but this detection mode is only used near detection workpiece surface
Defect, another is that the change that workpiece is placed in magnetic field by detecting magnetic field is judged be work by way of magnetic field detection workpiece
Part whether there is defect, but this detection mode, only when magnetic field is vertical with crackle, changes of magnetic field is the most obvious, so as to cause
The problem of detection is inaccurate.
Utility model content
The purpose of this utility model is to provide a kind of sensor of metal weldment carrying out flaw detection, solves the flaw detection of metal weldment
The problem of testing result is inaccurate, makes testing result relatively sharp, improves the accuracy of testing result.
In order to solve the above technical problems, the utility model provides a kind of sensor of metal weldment carrying out flaw detection, including：
Field generator for magnetic, polarized light source, magnetic rotation medium and imaging device, the magnetic rotation medium is positioned at outer
Add in magnetic field；
The field generator for magnetic is used to produce externally-applied magnetic field, and metal weldment to be detected is located in the externally-applied magnetic field,
The magnetic direction of the externally-applied magnetic field changes over time in the section to be measured of metal weldment；The polarized light source, for sending
Polarised light, and the polarised light is incided to the magnetic rotation medium in the externally-applied magnetic field；The magnetic rotation
Medium, for the incident polarised light to be reflexed to the imaging device；The imaging device, for the polarization after reflection
Light processing, obtains at each different magnetic field direction of the externally-applied magnetic field, the magneto optic images of the polarised light, so as to according to magneto-optic
Image judges that the metal weldment whether there is defect.
Wherein, the imaging device is specifically used for：
When the magnetic direction of the externally-applied magnetic field presets magnetic direction for first, the imaging device obtains the first magneto-optic
Image；When the magnetic direction of the externally-applied magnetic field presets magnetic direction for second, the imaging device obtains the second magneto-optic figure
Picture；Wherein, the described first default magnetic direction and the second default magnetic direction are not parallel to each other.
Wherein, the field generator for magnetic is two groups of magnetic poles for being full of magnet exciting coil；When the magnet exciting coil of first group of magnetic pole
When connecting direct current, the externally-applied magnetic field direction is the first default magnetic direction；When the magnet exciting coil of second group of magnetic pole is connected directly
During galvanic electricity, the externally-applied magnetic field direction is the second default magnetic direction.
Wherein, the imaging device is additionally operable to：
When the magnet exciting coil of first group of magnetic pole and second group of magnetic pole is turned on electric current, the 3rd magneto-optic figure is obtained
Picture.
Wherein, the field generator for magnetic is specifically used for producing magnetic direction in predetermined period with time rotation 180 degree
Magnetic field；The imaging device is specifically used in the predetermined period, and the imaging device obtains the polarised light in real time
The magneto optic images..
Wherein, the externally-applied magnetic field presses the magnetic field of varies with sinusoidal function for multiple sizes in the predetermined period with the time
The magnetic field of superposition.
Wherein, the field generator for magnetic is multigroup magnetic pole for being full of magnet exciting coil, and the magnet exciting coil, which is connected, sine
Alternating current.
Wherein, the field generator for magnetic is two groups of magnetic poles for being mutually perpendicular to be full of magnet exciting coil, and the magnet exciting coil connects
Logical sinusoidal ac, the phase difference of the sinusoidal ac of the magnet exciting coil connection of two groups of magnetic poles is 90 degree.
Wherein, the magnetic rotation medium is magneto-optic thin film, and the magneto-optic thin film is vertical with metal weldment section to be measured.
Wherein, the imaging device specifically includes analyzer and COMS cameras, the analyzer, for receiving the magneto-optic
The polarised light of film reflector, and polarised light is sent to COMS cameras；The COMS cameras, for being obtained to the polarization light processing
To the magneto optic images, to judge that the metal weldment whether there is defect according to the magneto optic images.
A kind of sensor of metal weldment carrying out flaw detection provided by the utility model, by by metal weldment as magnetic field
In the externally-applied magnetic field that generation device produces, because when the crack and vertical externally-applied magnetic field direction of metal weldment, to externally-applied magnetic field
Influence it is maximum, so information the defects of in order to obtain more accurate metal weldment, the additional magnetic in the utility model
Field direction varies over, to be detected in each different direction to the crack of metal weldment, by inclined
The light source that shakes sends the incident magnetic rotation medium being located in magnetic field of polarised light and reflexes to imaging device, and additional magnetic is obtained after processing
The magneto optic images of field change, so that by result images, sharpening, the crack for being conducive to more accurately understand metal weldment is believed
Breath, improves the accuracy of metal weldment carrying out flaw detection and the sharpening of result of detection, subsequently to be produced according to Analysis of test results
The work of raw Causes of Fracture provides relatively sharp accurate Information base, improves the availability of testing result.
Brief description of the drawings
For clearer explanation the utility model embodiment or the technical solution of the prior art, below will to embodiment or
Attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
Some embodiments of the utility model, for those of ordinary skill in the art, without creative efforts,
Other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is that a kind of structure of embodiment of sensor of metal weldment carrying out flaw detection provided by the utility model is shown
It is intended to；
Fig. 2 (a) is magnetic field line schematic diagram of the fractuer direction with magnetic direction externally-applied magnetic field when parallel；
The magnetic field line schematic diagram of externally-applied magnetic field when Fig. 2 (b) is fractuer direction and vertical magnetic direction；
Fig. 3 is a kind of principle schematic of embodiment of field generator for magnetic provided by the utility model；
Fig. 4 is a kind of embodiment schematic diagram that two groups of magnetic poles provided by the utility model produce process；
Fig. 5 is that the magnetic field that two groups of magnetic poles provided by the utility model produce is embodied in the one kind of Overlay at different moments
The schematic diagram of mode；
In attached drawing 1,1 be field generator for magnetic, 2 be externally-applied magnetic field, 3 be polarized light source, 4 be magnetic rotation medium, 5 be gold
Belong to weldment, 6 be analyzer, 7 be COMS cameras.
Embodiment
In order to make those skilled in the art more fully understand the utility model, below in conjunction with the accompanying drawings and it is embodied
The utility model is described in further detail for mode.Obviously, described embodiment is only the utility model part
Embodiment, instead of all the embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not doing
Go out all other embodiments obtained under the premise of creative work, shall fall within the protection scope of the present invention.
A kind of structure diagram of embodiment of sensor of metal weldment carrying out flaw detection provided by the utility model,
As shown in Figure 1, it can include：
Field generator for magnetic 1, polarized light source 3, magnetic rotation medium 4 and imaging device, 4, the magnetic rotation medium
In in externally-applied magnetic field 2；
The field generator for magnetic 1 is used to produce externally-applied magnetic field 2, and metal weldment 5 to be detected is located at the externally-applied magnetic field 2
In, the magnetic direction of the externally-applied magnetic field 2 changes over time in the section to be measured of metal weldment 5；
In the utility model the section to be measured of metal weldment can be metal weldment take up an official post meaning one needss detect section
Face, in other words, can use the crack situation of the technical solution of the utility model detection metal arbitrary section, as long as metal welding
The section that part needs to detect is located exactly in the plane of externally-applied magnetic field direction change.
Specifically, can be the magnetic direction of magnetic-field component of the externally-applied magnetic field 2 on parallel to 5 section to be measured of metal weldment
Change with the time, the magnetic direction of externally-applied magnetic field 2 can also be positioned only in the plane parallel with section to be measured, and magnetic
Field direction changes over time.
The polarized light source 3, is incided in the externally-applied magnetic field 2 for sending polarised light, and by the polarised light
The magnetic rotation medium 4；
The magnetic rotation medium 4, for the incident polarised light to be reflexed to the imaging device；
Specifically, magnetic rotation phenomenon, refer to plane polarized light along magnetic field line direction by medium in magnetic field when, plane of polarization
The phenomenon rotated.Magnetic rotation medium 4 is placed in externally-applied magnetic field 2, polarised light incides magnetic rotation medium 4, is subject to
The magnetic line of force of externally-applied magnetic field 2 influences, and deflects.If crack, polarised light are not present in the metal weldment 5 in externally-applied magnetic field 2
Angle by 4 post deflection of magnetic rotation medium is certain, if there are crack in the metal weldment 5 in externally-applied magnetic field 2,
Can have an impact the magnetic line of force of externally-applied magnetic field 2, and then the yawing moment of polarisation-affecting light.
The imaging device, for the polarization light processing after reflection, obtaining in 2 each different magnetic field of externally-applied magnetic field
During direction, the magneto optic images of the polarised light, to judge that the metal weldment 5 whether there is defect according to the magneto optic images.
Imaging device judges the change of 2 magnetic line of force of externally-applied magnetic field by detecting the yawing moment of polarised light, and generates magneto-optic
Image, so that information the defects of showing metal weldment 5 of clear image.
Specifically, the magneto optic images that imaging device processing polarised light obtains, can reflect metal weldment to a certain extent
Crack direction and size, be conducive to follow-up fracture Producing reason and analyzed and studied, improve detection structure
Availability.
It should be noted that since the direction in crack in metal weldment 5 is uncertain, (a) and Fig. 2 are please referred to Fig.2
(b), Fig. 2 (a) is the schematic diagram of the magnetic field line of externally-applied magnetic field 2 when fractuer direction is parallel with magnetic field line direction, and Fig. 2 (b) is crack
The schematic diagram of the magnetic field line of externally-applied magnetic field 2 when direction and vertical magnetic direction.
Only fractuer direction and during just vertical magnetic direction, as shown in Fig. 2 (b), influences the magnetic line of force of externally-applied magnetic field 2
The most obvious, when fractuer direction is parallel with magnetic direction, the influence to the magnetic line of force of externally-applied magnetic field 2 can be ignored, such as Fig. 2
(a) shown in.For this reason, in the utility model the magnetic direction of externally-applied magnetic field 2 on the direction parallel to gold solder part section to be measured with
Time change, the magneto optic images that imaging device obtains are that the magnetic direction of the externally-applied magnetic field 2 is inclined at each different direction
Shake the magneto optic images of light, to reach the situation from 5 defect of multiple magnetic directions detection metal weldment, improve the accurate of detection
Property.
In order to be detected in multiple and different directions to the crack of metal weldment 5, the not necessarily magnetic field side of externally-applied magnetic field 2
To can changed magnetic field, if for example, field generator for magnetic 1 is one block of magnet, the magnetic field of generation centered on magnet to
Surrounding radiates, and just needs to set multiple polarized light sources 3, magnetic rotation medium 4 and imaging device at this time, will necessarily cause to sense
The cost increase of device.
In addition, to obtain the testing result on 5 section to be measured of metal weldment in all directions or an only magnetic
Field direction, makes metal weldment 5 be rotated in magnetic field centered on the axis perpendicular to section to be measured, but metal weldment 5 is revolving
Once occurring laterally or longitudinally to deviate during turning, testing result can all be had an impact, therefore this mode is in practical operation
The difficulty of middle realization also can be larger.
In conclusion the technical solution of the utility model can not only obtain more accurately testing result, and simply
Easy, cost is low.
Based on above-described embodiment, in the another specific embodiment of the utility model, the imaging device specifically can be used for：
When the magnetic direction of the externally-applied magnetic field 2 presets magnetic direction for first, the imaging device obtains the first magnetic
Light image；
When the magnetic direction of the externally-applied magnetic field 2 presets magnetic direction for second, the imaging device obtains the second magnetic
Light image；
Wherein, not being parallel to each other between the described first default magnetic direction and the second default magnetic direction.
It should be noted that this is only a kind of specific embodiment of the utility model, externally-applied magnetic field 2 in the utility model
Direction be not limited only to the first default magnetic direction and the second default magnetic direction, can also have the three, the 4th even more
Default magnetic direction, magnetic direction is more, and the magneto optic images of the polarised light of corresponding record will be more, and the result of detection can also be got over
Accurately, it is mutually not flat that the most basic principle that each default magnetic direction needs to follow is that any two presets magnetic direction
OK.
In addition, do not limited the size of the externally-applied magnetic field 2 on each magnetic direction in the utility model, in general magnetic
The defects of field intensity is larger, metal weldment 5 information also can be relatively more obvious in the magneto optic images, but can equally give metal weldment 5
Certain damage is brought, therefore is typically chosen appropriate magnetic field intensity, and the size of the externally-applied magnetic field 2 on each magnetic direction is most
It is good identical, avoid magnetic field of different sizes and the magneto optic images are brought with influence, but this is the utility model ratio more preferably embodiment party
Formula, is not the necessary technical solution of the utility model.
Based on above-described embodiment, in the another specific embodiment of the utility model, can include：
The field generator for magnetic 1 is two groups of magnetic poles for being full of magnet exciting coil；
When the magnet exciting coil of first group of magnetic pole connects direct current, 2 direction of externally-applied magnetic field is the first default magnetic field side
To；
When the magnet exciting coil of second group of magnetic pole connects direct current, 2 direction of externally-applied magnetic field is the second default magnetic field side
To.
It should be noted that because magnetic field has synergistic effect, in the present embodiment, set the effect of two groups of magnetic poles main
It is in order to produce the magnetic field of two different directions, so the magnet exciting coil turn-on current of two groups of magnetic poles is nonsynchronous, when first
During the magnet exciting coil turn-on current of group magnetic pole, externally-applied magnetic field 2 is produced by first group of magnetic pole, and second group of magnetic pole does not produce magnetic field,
Conversely, during second group of magnetic pole turn-on current, magnetic field has second group of magnetic pole to produce；In view of the synergistic effect in magnetic field, can also make
The magnet exciting coil of first group of magnetic pole turn-on current all the time, and two obtained respectively when switching on and off second group of magnet exciting coil are not
The magnetic field in logical direction.
Based on above-described embodiment, in the utility model another specific embodiment, the imaging device is additionally operable to：
When the magnet exciting coil of first group of magnetic pole and second group of magnetic pole is turned on electric current, the 3rd magneto-optic figure is obtained
Picture.
It should be noted that it is a kind of embodiment in the utility model using two groups of magnetic poles, this practicality is new
Do not have inevitable limitation to the group number of magnetic pole in type, and to a certain extent, the externally-applied magnetic field 2 of the group more generations of number of magnetic pole
Magnetic direction it is also more, detect metal weldment 5 the defects of information it is also more accurate, for example, using three groups of magnetic poles, connect respectively
Lead to the externally-applied magnetic field 2 that the magnet exciting coil of three groups of magnetic poles can obtain three different directions, choose the excitation wire of any two groups of magnetic poles
Circle can also obtain the externally-applied magnetic field 2 of three different directions, and can also be obtained by being also turned on the magnet exciting coil of three groups of magnetic poles by one
The externally-applied magnetic field 2 in direction.In conclusion it can also realize the technical solution of the utility model using four groups, five groups of magnetic poles.
Also, the magnet exciting coil of two groups of magnetic poles, which can be to turn on direct current, can also connect alternating current, when connecting direct current
What is produced is stationary magnetic field, and it is changing magnetic field to connect caused by alternating current, and the size that two magnetic poles produce magnetic field becomes
During change, the direction that magnetic field is produced after superposition also can be different.
Based on above-described embodiment, in the utility model another specific embodiment, can include：
The field generator for magnetic 1 is specifically used for producing magnetic direction in predetermined period with the magnetic of time rotation 180 degree
；
The imaging device is specifically used in the predetermined period, and the imaging device obtains the polarised light in real time
The magneto optic images.
In order to avoid metal weldment 5 section a direction to be measured crack just not by the additional magnetic of each magnetic direction
2 detect, a more preferred embodiment be each direction on 5 section to be measured of metal weldment be detected from
And obtain more comprehensively testing result.
Based on above-described embodiment, in the utility model another specific embodiment, can include：
The externally-applied magnetic field 2 presses the magnetic field superposition of varies with sinusoidal function for multiple sizes in the predetermined period with the time
Magnetic field.
It should be noted that in order to obtain the 180 degree that the magnetic direction in predetermined period changes over time, not necessarily
Multiple magnetic field sizes by the magnetic field obtained after the magnetic field superposition of varies with sinusoidal function or other changing magnetic fields superposition and
Obtained magnetic field, but the change of each magnetic field size must be consecutive variations, and the situation of mutation may be not present, so, this
As long as the magnetic field of multiple magnetic field superpositions of size consecutive variations in utility model, can realize the technical side of the utility model
Case.
Based on above-described embodiment, it is another by the magnetic field after the magnetic field superposition of sinusoidal variations, the utility model to produce multiple sizes
In one specific embodiment, it can include：
The field generator for magnetic 1 is multigroup magnetic pole for being full of magnet exciting coil, and the magnet exciting coil, which is connected, simple alternating current
Electricity.
It should be noted that in above-described embodiment, the magnetic field of multiple size variations if necessary to produce is not by sine
Function changing magnetic field, then corresponding electric current in the present embodiment is nor sinusoidal ac, and there are multigroup magnetic pole in addition, working as
When, the angle between adjacent pole is traditionally arranged to be identical angle, but should avoid in multigroup magnetic pole that there are two groups of magnetic poles to produce
The situation that the magnetic field that magnetic field and the 3rd group of magnetic pole after raw magnetic field superposition produce is cancelled out each other just.
Based on above-described embodiment, in order to avoid magnetic pole group number is excessive so that the whole design of field generator for magnetic 1 becomes multiple
It is miscellaneous, in the another specific embodiment of the utility model, it can include：
The field generator for magnetic 1 can be two groups of magnetic poles for being mutually perpendicular to be full of magnet exciting coil, and the magnet exciting coil connects
Logical sinusoidal ac, the phase difference of the sinusoidal ac of the magnet exciting coil connection of two groups of magnetic poles is 90 degree.
Please refer to Fig.3, Fig. 4, Fig. 5, Fig. 3 is 1 a kind of embodiment of field generator for magnetic provided by the utility model
Principle schematic, Fig. 4 be two groups of magnetic poles provided by the utility model produce process a kind of embodiment schematic diagram, figure
5 for two groups of magnetic poles provided by the utility model produce magnetic field in a kind of signal of embodiment of Overlay at different moments
Figure.
As shown in Figure 3 and Figure 4, two groups of magnetic poles are mutually perpendicular to, after sinusoidal ac is connected, with the change of size of current
Change, the N poles of two magnetic poles and S poles alternately change, and the size that two groups of magnetic poles produce magnetic field also changes, so as to obtain such as Fig. 5
Shown variation magnetic field, as shown in figure 5, the magnetic field that two groups of magnetic poles produce is respectively x1 and x2, the magnetic direction after superposition is x,
The size of wherein x1 and x2 and changing with the change of time for direction, the magnetic direction after superposition gradually rotate.
It should be noted that what is connected in the present embodiment in the magnet exciting coil of two groups of magnetic poles is sinusoidal ac, and two groups
Magnetic pole is mutually perpendicular to, so the phase difference for the electric current connected in two groups of magnet exciting coils is 90 degree, this can ensure in two groups of coils
Connect same frequency, with peak value sinusoidal ac when, after the magnetic field superposition that two groups of magnetic poles produce, magnetic direction is revolved with the time
Turn, but magnetic field size can remain a steady state value, for the magnetic pole of different groups of numbers, and the angle between adjacent pole
Different magnetic poles, phase difference may be set according to actual conditions, such as the angle between two groups of magnetic poles is 60 degree, then phase difference
For 60 degree etc..But the essential features that 2 constant magnitude of externally-applied magnetic field is not the utility model are to maintain, but this practicality is new
A kind of relatively preferred embodiment of type.
Based on above-mentioned any embodiment, in the another specific embodiment of the utility model, the magnetic rotation medium 4 is magnetic
Optical thin film, and the magneto-optic thin film is vertical with 5 section to be measured of metal weldment.
Specifically, since the magnetic direction of externally-applied magnetic field 2 is parallel to section to be measured, magnetic field line is to perpendicular to magnetic direction
The effect of polarised light in plane is the most obvious, therefore, can be very sensitive by the deflection of polarised light once magnetic field changes
Detect.It should be noted that this is only a kind of embodiment of the utility model, magneto-optic thin film substantially with gold
The embodiment of the utility model can also be realized by belonging to 5 orthogonal position of weldment.
Based on above-described embodiment, in the utility model another specific embodiment, can include：
The imaging device specifically includes analyzer 6 and COMS cameras 7；
Wherein, the analyzer 6, for receiving the polarised light of magneto-optic thin film reflection, and by polarised light send to
COMS cameras 7；
The COMS cameras 7, for obtaining the magneto optic images to the polarization light processing, to judge institute according to the magneto optic images
State metal weldment 5 and whether there is defect.
Specifically, analyzer 6 is capable of detecting when the deflection angle of polarised light, COMS cameras 7 are according to polarization photogenerated magneto-optic
Image, the defects of can clearly reflecting metal weldment 5 information.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be with it is other
The difference of embodiment, between each embodiment same or similar part mutually referring to.For dress disclosed in embodiment
For putting, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related part is referring to method part
Explanation.
Professional further appreciates that, with reference to each exemplary unit of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, generally describes each exemplary composition and step according to function in the above description.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical solution.Specialty
Technical staff can realize described function to each specific application using distinct methods, but this realization should not
Think to exceed the scope of the utility model.
The sensor of 5 carrying out flaw detection of metal weldment provided by the utility model is described in detail above.Herein
In apply specific case the principle and embodiment of the utility model be set forth, the explanation of above example is simply used
Understand the method and its core concept of the utility model in help.It should be pointed out that for those skilled in the art
For, on the premise of the utility model principle is not departed from, some improvement and modification can also be carried out to the utility model, these
Improve and modification is also fallen into the protection domain of the utility model claims.
Claims (10)
- A kind of 1. sensor of metal weldment carrying out flaw detection, it is characterised in that including：Field generator for magnetic, polarized light source, mangneto Optically-active medium and imaging device, the magnetic rotation medium are located in externally-applied magnetic field；The field generator for magnetic is used to produce externally-applied magnetic field, and metal weldment to be detected is located in the externally-applied magnetic field, described The magnetic direction of externally-applied magnetic field changes over time in the section to be measured of metal weldment；The polarized light source, for sending polarised light, and described in the polarised light incided in the externally-applied magnetic field Magnetic rotation medium；The magnetic rotation medium, for the incident polarised light to be reflexed to the imaging device；The imaging device, for the polarization light processing after reflection, obtaining in each different magnetic field direction of the externally-applied magnetic field When, the magneto optic images of the polarised light, to judge that the metal weldment whether there is defect according to the magneto optic images.
- 2. sensor according to claim 1, it is characterised in that the imaging device is specifically used for：When the magnetic direction of the externally-applied magnetic field presets magnetic direction for first, the imaging device obtains the first magneto-optic figure Picture；When the magnetic direction of the externally-applied magnetic field presets magnetic direction for second, the imaging device obtains the second magneto-optic figure Picture；Wherein, the described first default magnetic direction and the second default magnetic direction are not parallel to each other.
- 3. sensor according to claim 2, it is characterised in that the field generator for magnetic is full of magnet exciting coil for two groups Magnetic pole；When the magnet exciting coil of first group of magnetic pole connects direct current, the externally-applied magnetic field direction is the first default magnetic direction；When the magnet exciting coil of second group of magnetic pole connects direct current, the externally-applied magnetic field direction is the second default magnetic direction.
- 4. sensor according to claim 3, it is characterised in that the imaging device is additionally operable to：When the magnet exciting coil of first group of magnetic pole and second group of magnetic pole is turned on electric current, the 3rd the magneto optic images are obtained.
- 5. sensor according to claim 1, it is characterised in that the field generator for magnetic is specifically used for producing magnetic field side To the magnetic field for rotating 180 degree with the time in predetermined period；The imaging device is specifically used in the predetermined period, and the imaging device obtains the magneto-optic of the polarised light in real time Image.
- 6. sensor according to claim 5, it is characterised in that the externally-applied magnetic field is multiple sizes in the default week Magnetic field in phase with the time by the magnetic field superposition of varies with sinusoidal function.
- 7. sensor according to claim 6, it is characterised in that the field generator for magnetic is full of magnet exciting coil to be multigroup Magnetic pole, the magnet exciting coil, which is connected, sinusoidal ac.
- 8. sensor according to claim 7, it is characterised in that the field generator for magnetic is mutually perpendicular to be full of for two groups The magnetic pole of magnet exciting coil, the magnet exciting coil connect sinusoidal ac, the sinusoidal ac of the magnet exciting coil connection of two groups of magnetic poles Phase difference be 90 degree.
- 9. according to claim 1 to 8 any one of them sensor, it is characterised in that the magnetic rotation medium is thin for magneto-optic Film, and the magneto-optic thin film is vertical with metal weldment section to be measured.
- 10. sensor according to claim 9, it is characterised in that the imaging device specifically includes analyzer and COMS Camera；Wherein, the analyzer, for receiving the polarised light of the magneto-optic thin film reflection, and polarised light is sent to COMS phases Machine；The COMS cameras, for obtaining the magneto optic images to the polarization light processing, to judge the gold according to the magneto optic images Belong to weldment and whether there is defect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721189050.4U CN207318413U (en) | 2017-09-14 | 2017-09-14 | A kind of sensor of metal weldment carrying out flaw detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721189050.4U CN207318413U (en) | 2017-09-14 | 2017-09-14 | A kind of sensor of metal weldment carrying out flaw detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207318413U true CN207318413U (en) | 2018-05-04 |
Family
ID=62382794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721189050.4U Active CN207318413U (en) | 2017-09-14 | 2017-09-14 | A kind of sensor of metal weldment carrying out flaw detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207318413U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340329A (en) * | 2017-09-14 | 2017-11-10 | 广东工业大学 | A kind of method and sensor of metal weldment carrying out flaw detection |
-
2017
- 2017-09-14 CN CN201721189050.4U patent/CN207318413U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340329A (en) * | 2017-09-14 | 2017-11-10 | 广东工业大学 | A kind of method and sensor of metal weldment carrying out flaw detection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107378200B (en) | Micro-gap weld joint tracking method and device under excitation of rotating magnetic field | |
| JP4807185B2 (en) | Method and apparatus for correcting balance of rotating body | |
| CN108919117B (en) | Equipment for testing permanent magnet rotor magnetic steel and method for testing rotor magnetic steel | |
| CN107340329A (en) | A kind of method and sensor of metal weldment carrying out flaw detection | |
| CN207318413U (en) | A kind of sensor of metal weldment carrying out flaw detection | |
| JP2016105046A (en) | Magnetic nondestructive inspection device | |
| CN106133515B (en) | Inspection system and inspection method | |
| CN105044627B (en) | A kind of rotor magnetic flux test system and its test method | |
| JP2018124154A (en) | C-scope imaging system of eddy current flaw detection result for fatigue crack of steel bridge welded edge | |
| JP2008272900A (en) | Oscillation state measuring method at machining stage of work and/or tool | |
| CN107831211A (en) | A kind of method and device of metal weldment defects detection | |
| CN102101111A (en) | Optical detection-based E type magnet sorting method | |
| CN210071741U (en) | Quick detection device of metal pipeline work piece crackle | |
| CN101975933B (en) | Steady weak magnetic-field measurement apparatus based on Wigan effect | |
| CN110455313A (en) | A kind of detection device of optical fibre gyro | |
| CN106526510B (en) | Device and method for measuring magnetic declination of magnet part | |
| CN113109756B (en) | Electric energy meter external power frequency magnetic field test method | |
| Liu et al. | Magneto-optical imaging nondestructive testing of welding defects based on image fusion | |
| CN212845842U (en) | Generator rotor winding interturn fault on-line monitoring device | |
| CN207586176U (en) | A kind of device of metal weldment defects detection | |
| CN105277815A (en) | Equipment for detecting diamagnetism | |
| JP5401110B2 (en) | Position measurement method | |
| JPH0820421B2 (en) | Flaw detection method and flaw detection device | |
| CN206488742U (en) | The synchronously driven structure steel wire vision measurer of bi-motor | |
| JPH05196702A (en) | Method and apparatus for inspecting rotary electric apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |