CN107271572A - Electromagnetic acoustic sheet metal flaw detection transducer - Google Patents
Electromagnetic acoustic sheet metal flaw detection transducer Download PDFInfo
- Publication number
- CN107271572A CN107271572A CN201710641604.8A CN201710641604A CN107271572A CN 107271572 A CN107271572 A CN 107271572A CN 201710641604 A CN201710641604 A CN 201710641604A CN 107271572 A CN107271572 A CN 107271572A
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- magnetic conductive
- sheet metal
- conductive shell
- brass
- flaw detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention belongs to field of non destructive testing, it is related to a kind of electromagnetic acoustic sheet metal flaw detection transducer, including magnetic conductive shell, handle, brass, square permanent magnet, rotation handle apparatus, PCB and transducing coil, it is characterised in that：The middle side part of magnetic conductive shell one is provided with accommodating chamber and shell wire outlet, the top and bottom of accommodating chamber are all provided with brass mounting groove, upper and lower two brass mounting grooves are located on vertical direction straight line, brass is fixed in brass mounting groove, square permanent magnet is in accommodating chamber, and the side of square permanent magnet is connected with rotation handle apparatus, and the upper surface of magnetic conductive shell is provided with handle, the lower surface of magnetic conductive shell is provided with PCB, and PCB is fixed with transducing coil.It is convenient for carrying, and the movable transducer architecture integration of permanent magnet is adapted to detect for.
Description
Technical field
The invention belongs to field of non destructive testing, it is related to a kind of utilization Electromagnetic coupling method excitation and receives the integration of ultrasonic wave
Mancarried device, more particularly to a kind of electromagnetic acoustic sheet metal flaw detection transducer.
Background technology
Sheet metal is essential raw material in industrial production, the industry such as aerospace industry, automobile making, precision instrument
It is higher to sheet metal quality requirement, the crackle during surface scratches, hole and layering, or use in manufacturing process, corruption
The defects such as erosion need just to be detected before sheet metal use.Non-destructive testing technology is one kind of defects detection mode,
Which is detected to whether there is defect in checked object or there is inhomogeneities and asked using characteristics such as sound, light, magnetic and the electricity of material
Topic, can provide the information such as defect size, position, property and quantity, product quality is improved in the industrial production, life is ensure that
Production safety.
Electromagnetic acoustic is the new technology that field of non destructive testing occurs, and the detection technique is non-contact detecting, it is not necessary to coupled
Agent；The wave form of generation is various, it is possible to achieve the selection of waveform pattern, is adapted to do surface defects detection, is adapted to high temperature detection,
Detection speed is fast, and Acoustic Wave Propagation distance is remote.Therefore, in commercial Application, the application of ultrasonic inspection has spread over high temperature, high speed
It is one of frontier development technology of Non-Destructive Testing with the field such as on-line checking.As the core component of electromagnetic acoustic detecting system,
Electromagnet ultrasonic changer is made up of tested metallic plate, coil, the part of magnet three.High frequency electric is placed in tested metal sheet surface to swash
Coil under encouraging, the coil excitation goes out magnetic field and vortex is induced in test specimen, is vortexed in static magnetic field and dynamic magnetic field
Lorentz force is born under effect, the power, which is then acted on, makes crystal produce periodic vibration on the crystallization dot matrix of metal, inspire
Ultrasonic wave is so as in metal specimen surface generation ultrasonic sound field.Electromagnet and permanent magnet may be selected in magnet, but electromagnet needs
Working power, is not easy to changing for outdoor application, permanent magnet of the design selection without additional working power, but Conventional permanent magnet iron construction
Its polarity of the magnetic field of energy device is outside, is easily adsorbed in when using on ferrimagnet, therefore is inconvenient to operate during detection application.Influence inspection
Survey precision, the problem of also having inconvenient to carry.
The content of the invention
Goal of the invention：
The problem of in order to solve traditional electromagnetic supersonic flaw detecting probe operation and be inconvenient to carry, the invention provides a kind of integral magnetic
The movable electromagnetic acoustic sheet metal flaw detection transducer for electromagnetic supersonic flaw detecting of iron construction, it is convenient for carrying, permanent magnet
It is movable structure-integrated to be adapted to detect for.
Technical scheme：
Electromagnetic acoustic sheet metal flaw detection transducer, including magnetic conductive shell, handle, brass, square permanent magnet, rotation handle dress
Put, PCB and transducing coil, it is characterised in that：The middle side part of magnetic conductive shell one is provided with accommodating chamber and shell wire outlet,
The top and bottom of accommodating chamber are all provided with brass mounting groove, and upper and lower two brass mounting grooves are located at vertical direction straight line
On, brass is fixed in brass mounting groove, and square permanent magnet is in accommodating chamber, and the side of square permanent magnet is connected with rotation handle
Device, the upper surface of magnetic conductive shell is provided with handle, and the lower surface of magnetic conductive shell is provided with PCB, and PCB is fixed
There is transducing coil.
The magnetic conductive shell is made up of the first magnetic conductive shell and the second magnetic conductive shell, outside the first magnetic conductive shell and the second magnetic conduction
Shell is split at upper and lower two brass mounting grooves, and two brass mounting grooves are on vertical direction straight line.
Protection inner casing is installed, protection inner casing includes the first protection inner casing and the second protection inner casing in the accommodating chamber, the
One protection inner casing and the second protection inner casing are respectively arranged in the both sides of brass.
One end accommodating chamber of the protection inner casing is provided with end cap, and end cap end face is provided with draw ring.
The rotation handle apparatus includes fixture, rotating bar and handle, fixture clamping square permanent magnet, one end of rotating bar
It is connected with fixture, the side of the other end of rotating bar is connected with handle.
The PCB both sides are vertically connected with the first side plate and the second side plate, and the first side plate and the second side plate are respectively opened
There is the mounting groove of 2 vertical strips, the first side plate or the second side plate are also provided with 2 side plate wire outlets.
The PCB is provided with 2 wiring board wire outlets.
The PCB lower surface is provided with transducing coil, or upper surface is provided with transducing coil, or two ends up and down
Face is all provided with transducing coil.
It is excessive for circular arc that the square permanent magnet rotates four sides of axial direction.
First magnetic conductive shell and the second magnetic conductive shell are fixed by the connecting bolt through brass mounting groove.
Advantage and effect：
The use relatively convenient of this electromagnetic acoustic sheet metal flaw detection transducer, ultrasonic excitation is inside metal specimen, transducing
Device need not contact surface of test piece；By changing the Nomenclature Composition and Structure of Complexes of transducer, that is, change dismountable PCB and its fixation
Structure, just can inspire various types of ultrasonic wave, so as to detect different types of sheet metal.
Use occasion is more extensive, and sound source is located at the inside of metal board under test, Detection results by metal sheet surface planarization and
The external conditions such as slickness influence very little, and detection efficiency is higher；Meanwhile, by temperature conditions very little, environmental condition is fitted
Ying Xingqiang, can be applied to the extreme detection environment such as high/low temperature.
The pole orientation of cylinder-shaped magnet depends on the magnetizing direction that it is magnetized when magnetizing, in general, filled circles
Two end faces of post magnet are respectively N poles and S poles, and its magnetic line of force distribution of such case is by peripheral space from N poles one side
S poles one side is pointed to, and the edge magnetic field of end face is most strong, center of circle position magnetic field is weaker；The space magnetic field nearer from magnet is more
By force, the space magnetic field more remote from magnet is weaker.And there is magnetic pole in six faces of square magnet, magnetic field line forms closure from N poles to S poles
Magnetic circuit, magnetic field is stronger, and generation suction is larger, so square magnet has more preferable effect, magnet axial direction side chamfer design, magnetic field
Transition is smoother.
There is fixed handle structure, so as to more easily lift transducer；There is rotary handle structure, facilitate the rotation of magnet
Turn.Meet the design sense of portable transducer.
Brief description of the drawings
Fig. 1 is electromagnetic acoustic sheet metal flaw detection transducer overall schematic；
Fig. 2 is that electromagnetic acoustic sheet metal flaw detection transducer integrally splits schematic diagram；
Fig. 3 is electromagnetic acoustic sheet metal flaw detection transducer magnetic conductive shell internal structure profile；
Fig. 4 is ultrasonic excitation process schematic；
Fig. 5 is process chart.
It is described to be labeled as：1. the first magnetic conductive shell, 2. second magnetic conductive shells, 3. handles, 4. brass, 5. square permanent magnets,
6.PCB wiring boards, 7. transducing coils, 8. accommodating chambers, 9. brass mounting grooves, 10. first protection inner casings, 11. second protection inner casings,
12. end cap, 13. draw rings, 14. fixtures, 15. rotating bars, 16. handles, 17. first side plates, 18. second side plates, 19. mounting grooves,
20. side plate wire outlet, 21. shell wire outlets, 22. wiring board wire outlets, 23. connecting bolts, 24. are tested
Part.
Embodiment
A kind of electromagnetic acoustic sheet metal flaw detection transducer as shown in Figure 1, Figure 2 and Figure 3, including magnetic conductive shell, handle
3rd, brass 4, square permanent magnet 5, rotation handle apparatus, PCB 6 and transducing coil 7, it is characterised in that：Magnetic conductive shell one
Middle side part is provided with accommodating chamber 8 and shell wire outlet 21, and the top and bottom of accommodating chamber 8 are all provided with brass mounting groove 9, it is upper and
Lower two brass mounting grooves 9 are located on vertical direction straight line, and magnetic conductive shell is by the first magnetic conductive shell 1 and the second magnetic conductive shell
2 compositions, the first magnetic conductive shell 1 and the second magnetic conductive shell 2 are split, two brass peaces at upper and lower two brass mounting grooves 9
Tankage 9 is on vertical direction straight line.First magnetic conductive shell 1 and the second magnetic conductive shell 2 pass through the company through brass mounting groove 9
Connecting bolt 23 is fixed together.The shell of split is easily installed internals, and the fixation to brass 4 is more firm.Pacify in accommodating chamber 8
Equipped with protection inner casing, protection inner casing includes the first protection protection inner casing 11 of inner casing 10 and second, and magnet can be protected to be damaged from external force
It is bad.Brass 4 is fixed in brass mounting groove 9, and square permanent magnet 5 is in the protection inner casing in accommodating chamber 8, square 5 turns of permanent magnet
Moving axis to four sides for circular arc excessively, first protection inner casing 10 and second protection inner casing 11 be respectively arranged in the two of brass 4
Side.End cap 12 is installed, the end face of end cap 12 is provided with draw ring 13 in one end accommodating chamber 8 for protecting inner casing.The side of square permanent magnet 5
Rotation handle apparatus is connected with, rotating handle apparatus includes fixture 14, rotating bar 15 and handle 16, the clamping square permanent magnetism of fixture 14
Iron 5, one end of rotating bar 15 is connected with fixture 14, and the side of the other end of rotating bar 15 is connected with handle 16.Magnetic conductive shell
Upper surface handle 3 is installed, the lower surface of magnetic conductive shell is provided with PCB 6, and PCB 6 is fixed with transducing coil
7.The both sides of PCB 6 are vertically connected with the first side plate 17 and the second side plate 18, and the first side plate 17 and the second side plate 18 are respectively provided with
The mounting groove 19 of 2 vertical strips, can adjust the height of PCB 6 by mounting groove 19.First side plate 17 or the second side plate
18 are also provided with 2 side plate wire outlets 20, and PCB 6 is provided with 2 wiring board wire outlets 22.Under PCB 6
End face is provided with transducing coil 7, and the wire that coil 7 is drawn passes through wiring board wire outlet 22, the and of shell wire outlet 21
Side plate wire outlet 20 is connected with power supply.
Operation principle of the present invention：
Electromagnetic acoustic sheet metal flaw detection transducer is integrated, and is not joined directly together with tested metallic plate, by rotating hand
Handle on-off magnetic force detects metal sheet surface defect.
Ultrasonic excitation process by the excitation coil for being connected with high frequency alternating current as shown in figure 4, be placed on test specimen table
Face, can generate an alternating electromagnetic field, and then generate and exciting current frequency on test specimen surface in test specimen
Identical but in opposite direction current vortex, according to Faraday's electromagnetic induction law, the charged particle in test specimen is applied in permanent magnet
Plus bias magnetic field in by Lorentz force, its direction is judged by left hand rule, the particle on test specimen surface is made by power
Vibrated with occurring high frequency periodic, and be delivered to the particle of surrounding, and then occur small elastic deformation, with speed and displacement
Elastic vibration in the form of ripple in test specimen internal communication, inspire the frequency identical ultrasonic wave with alternating current.
As shown in figure 5, this transducer course of work is：Signal generating circuit produces high-frequency pulse signal, believes as excitation
Number, power amplification circuit is driven across, by impedance matching circuit after amplification, is applied on the coil of transmitting transducer, is connected with
The coil of high frequency alternating current produces current vortex in sheet metal surface, and the bias magnetic field that current vortex is provided with permanent magnet is made jointly
With producing ultrasonic wave inside sheet metal, propagate and received by receive transducer in sheet material, receiving coil must be to faint
Ultrasonic signal is sensitive, and coupling produces minimum voltage, and this voltage signal carries out one-level amplification by pre-amplification circuit, then passes through
Filter circuit filtering is crossed, finally goes out to detect signal in oscilloscope display, result export is subjected to data processing and analysis.
Major function：
The electrical power of input can be converted into mechanical output and blazed abroad again by electromagnet ultrasonic changer, autophage energy compared with
Few, this transducer can be used for the defects detection of sheet metal, including nonferromugnetic material and ferrimagnet, and different is tested
Part is also different to transducer parameter request, and the magnet and coil combination form of this portable transducer can be modified at any time,
For the detection to the different defects of different materials.
It whether there is defect or inhomogeneities in detection sheet metal for convenience, and provide defect size, position rapidly
Put, the information such as property and quantity, the subject matter for actually detected middle appearance solved, and one is to make transducer designs convenient
Carry；Two be to be adapted to detect for transducer architecture integration, so as to be efficiently modified transducer fabrication process, realizes that sheet metal lacks
Sunken rapid and convenient detection.
Split design facilitates dismounting and change inner magnet, and magnet of different shapes is used for different types of visit with coil combination
Wound.It is more convenient that fixed handle lifts strong magnet base；Protect acting as anti-vibration protected magnet, slowing down magnet strain speed for inner casing
The degree increase life-span；Brass is non-magnet_conductible material, when not in use, due to the not magnetic conductivity of brass, shape between magnet and cast iron housing
Into the closed magnetic circuit of left and right two, suction is not produced, in use, rotary magnet, magnet and cast iron housing one closed magnetic circuit of formation,
Object under test can be adsorbed by producing suction.
Cast iron housing makes transducer architecture more firm with studs, and its raw material is more environmentally-friendly, the carrying of transducer
It is more convenient with using.Rounding square magnet possesses outstanding anti-scraping structure, when rotating square permanent magnet, may be such that magnetic field
Smooth excessiveness.
Above content is to combine the detailed description that optimal technical scheme is done to the present invention, it is impossible to assert the specific reality of invention
Apply and be only limitted to these, for the simple deduction and replacement made under the premise of inventive concept is not departed from, should all be considered as this hair
Bright protection domain.
Claims (10)
1. electromagnetic acoustic sheet metal flaw detection transducer, including magnetic conductive shell, handle, brass, square permanent magnet, rotation handle dress
Put, PCB and transducing coil, it is characterised in that：The middle side part of magnetic conductive shell one is provided with accommodating chamber and shell wire outlet,
The top and bottom of accommodating chamber are all provided with brass mounting groove, and upper and lower two brass mounting grooves are located at vertical direction straight line
On, brass is fixed in brass mounting groove, and square permanent magnet is in accommodating chamber, and the side of square permanent magnet is connected with rotation handle
Device, the upper surface of magnetic conductive shell is provided with handle, and the lower surface of magnetic conductive shell is provided with PCB, and PCB is fixed
There is transducing coil.
2. electromagnetic acoustic sheet metal flaw detection transducer according to claim 1, it is characterised in that：The magnetic conductive shell is by
One magnetic conductive shell and the second magnetic conductive shell composition, the first magnetic conductive shell and the second magnetic conductive shell are in upper and lower two brass mounting grooves
Locate as split, two brass mounting grooves are on vertical direction straight line.
3. electromagnetic acoustic sheet metal flaw detection transducer according to claim 1, it is characterised in that：Installed in the accommodating chamber
There is protection inner casing, protection inner casing includes the first protection inner casing and the second protection inner casing, the first protection inner casing and the second protection inner casing
It is respectively arranged in the both sides of brass.
4. electromagnetic acoustic sheet metal flaw detection transducer according to claim 1, it is characterised in that：The one of the protection inner casing
End cap is installed, end cap end face is provided with draw ring in the accommodating chamber of end.
5. electromagnetic acoustic sheet metal flaw detection transducer according to claim 1, it is characterised in that：The rotation handle apparatus
Including fixture, rotating bar and handle, fixture clamping square permanent magnet, one end of rotating bar is connected with fixture, rotating bar it is another
The side of one end is connected with handle.
6. electromagnetic acoustic sheet metal flaw detection transducer according to claim 1, it is characterised in that：The PCB two
Side is vertically connected with the first side plate and the second side plate, and the first side plate and the second side plate are respectively provided with the mounting groove of 2 vertical strips,
First side plate or the second side plate are also provided with 2 side plate wire outlets.
7. electromagnetic acoustic sheet metal flaw detection transducer according to claim 6, it is characterised in that：The PCB is opened
There are 2 wiring board wire outlets.
8. electromagnetic acoustic sheet metal flaw detection transducer according to claim 1, it is characterised in that：Under the PCB
End face is provided with transducing coil, or upper surface is provided with transducing coil, or two end faces are all provided with transducing coil up and down.
9. electromagnetic acoustic sheet metal flaw detection transducer according to claim 1, it is characterised in that：The square permanent magnet turns
Moving axis to four sides for circular arc it is excessive.
10. electromagnetic acoustic sheet metal flaw detection transducer according to claim 2, it is characterised in that：Outside first magnetic conduction
Shell and the second magnetic conductive shell are fixed by the connecting bolt through brass mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710641604.8A CN107271572B (en) | 2017-07-31 | 2017-07-31 | Electromagnetic ultrasonic metal sheet flaw detection transducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710641604.8A CN107271572B (en) | 2017-07-31 | 2017-07-31 | Electromagnetic ultrasonic metal sheet flaw detection transducer |
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| CN107271572A true CN107271572A (en) | 2017-10-20 |
| CN107271572B CN107271572B (en) | 2023-09-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741460A (en) * | 2017-11-29 | 2018-02-27 | 沈阳工业大学 | The transducer of electromagnetic acoustic in-pipeline detector is servo-actuated mechanical device structure |
| CN108802185A (en) * | 2018-06-26 | 2018-11-13 | 哈尔滨工业大学 | Metal material defects detection sensor based on impulse eddy current and electromagnetic acoustic |
| CN111380963A (en) * | 2020-05-13 | 2020-07-07 | 桂林电子科技大学 | Omnidirectional SH wave electromagnetic ultrasonic transducer without permanent magnet and design method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5154081A (en) * | 1989-07-21 | 1992-10-13 | Iowa State University Research Foundation, Inc. | Means and method for ultrasonic measurement of material properties |
| CN2351283Y (en) * | 1998-11-10 | 1999-12-01 | 欧阳利民 | Check stamping machine |
| US20090139335A1 (en) * | 2004-11-05 | 2009-06-04 | Michael Kroning | Device and Method for the Material Testing and/or Thickness Measurements of a Test Object That Contains at Least Fractions of Electrically Conductive and Ferromagnetic Material |
| CN202330358U (en) * | 2011-11-23 | 2012-07-11 | 北京工业大学 | SH0 electromagnetic acoustic transducer for detecting defects of plate structure |
| CN102928503A (en) * | 2012-10-24 | 2013-02-13 | 天津工业大学 | Electromagnetic acoustic emission nondestructive inspection device for metal plate |
| CN104198581A (en) * | 2014-09-01 | 2014-12-10 | 北京工业大学 | Lorentz force-based electromagnetic acoustic surface wave sensor with high signal to noise ratio |
| CN205027323U (en) * | 2015-10-21 | 2016-02-10 | 湖北工业大学 | Electromagnetic acoustic thickness measuring probe that magnetic force can break |
| CN105548352A (en) * | 2015-11-17 | 2016-05-04 | 苏州博昇科技有限公司 | Electromagnetic ultrasonic transducer of end portion-free detection blind area |
| CN105758938A (en) * | 2016-03-03 | 2016-07-13 | 中南大学 | 550-DEG C high-temperature metal material electromagnetic ultrasonic flaw detection method and device |
-
2017
- 2017-07-31 CN CN201710641604.8A patent/CN107271572B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5154081A (en) * | 1989-07-21 | 1992-10-13 | Iowa State University Research Foundation, Inc. | Means and method for ultrasonic measurement of material properties |
| CN2351283Y (en) * | 1998-11-10 | 1999-12-01 | 欧阳利民 | Check stamping machine |
| US20090139335A1 (en) * | 2004-11-05 | 2009-06-04 | Michael Kroning | Device and Method for the Material Testing and/or Thickness Measurements of a Test Object That Contains at Least Fractions of Electrically Conductive and Ferromagnetic Material |
| CN202330358U (en) * | 2011-11-23 | 2012-07-11 | 北京工业大学 | SH0 electromagnetic acoustic transducer for detecting defects of plate structure |
| CN102928503A (en) * | 2012-10-24 | 2013-02-13 | 天津工业大学 | Electromagnetic acoustic emission nondestructive inspection device for metal plate |
| CN104198581A (en) * | 2014-09-01 | 2014-12-10 | 北京工业大学 | Lorentz force-based electromagnetic acoustic surface wave sensor with high signal to noise ratio |
| CN205027323U (en) * | 2015-10-21 | 2016-02-10 | 湖北工业大学 | Electromagnetic acoustic thickness measuring probe that magnetic force can break |
| CN105548352A (en) * | 2015-11-17 | 2016-05-04 | 苏州博昇科技有限公司 | Electromagnetic ultrasonic transducer of end portion-free detection blind area |
| CN105758938A (en) * | 2016-03-03 | 2016-07-13 | 中南大学 | 550-DEG C high-temperature metal material electromagnetic ultrasonic flaw detection method and device |
Non-Patent Citations (2)
| Title |
|---|
| 高松巍 等: "基于电磁超声的金属板测厚技术仿真研究" * |
| 高松巍;李桂颖;杨理践;: "基于电磁超声的金属板测厚技术仿真研究", 无损探伤, vol. 35, no. 06, pages 13 - 16 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741460A (en) * | 2017-11-29 | 2018-02-27 | 沈阳工业大学 | The transducer of electromagnetic acoustic in-pipeline detector is servo-actuated mechanical device structure |
| CN107741460B (en) * | 2017-11-29 | 2024-06-04 | 沈阳工业大学 | Transducer follow-up mechanical device structure of detector in electromagnetic ultrasonic pipeline |
| CN108802185A (en) * | 2018-06-26 | 2018-11-13 | 哈尔滨工业大学 | Metal material defects detection sensor based on impulse eddy current and electromagnetic acoustic |
| CN108802185B (en) * | 2018-06-26 | 2020-12-29 | 哈尔滨工业大学 | Metal material defect detection sensor based on pulse eddy current and electromagnetic ultrasound |
| CN111380963A (en) * | 2020-05-13 | 2020-07-07 | 桂林电子科技大学 | Omnidirectional SH wave electromagnetic ultrasonic transducer without permanent magnet and design method thereof |
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| Publication number | Publication date |
|---|---|
| CN107271572B (en) | 2023-09-26 |
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