CN107084692A - Electromagnetic acoustic shear wave thickness measuring transducer - Google Patents
Electromagnetic acoustic shear wave thickness measuring transducer Download PDFInfo
- Publication number
- CN107084692A CN107084692A CN201710524113.5A CN201710524113A CN107084692A CN 107084692 A CN107084692 A CN 107084692A CN 201710524113 A CN201710524113 A CN 201710524113A CN 107084692 A CN107084692 A CN 107084692A
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- Prior art keywords
- circuit board
- thickness measuring
- shear wave
- electromagnetic acoustic
- measuring transducer
- 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.)
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- 230000002463 transducing effect Effects 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000004804 winding Methods 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000009659 non-destructive testing Methods 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
The invention belongs to ultrasonic detecting technology field in Non-Destructive Testing, it is related to a kind of electromagnetic acoustic shear wave thickness measuring transducer, it is characterised in that：Including square permanent magnet, transducing coil, hand-held device, framework and circuit board; framework includes the protecting frame on the inside of shell and shell; circuit board is provided with inside protecting frame; hand-held device side is fixed together through shell and circuit board and with shell and circuit board; the opposite side of the internal circuit board of protecting frame is connected with transducing coil, and transducing coil is wrapped in square permanent magnet border.This electromagnetic acoustic shear wave thickness measuring transducer selects winding displacement coiling, and enamel-covered wire is closely knit to be wound on permanent magnet, and the utilization rate of coil is high, and cost is low and is easy to assemble and replaces, the function with thickness measuring, flaw detection.
Description
Technical field
The invention belongs to ultrasonic detecting technology field in Non-Destructive Testing, it is related to a kind of core for being used to producing and receiving ultrasonic wave
A kind of center portion part, and in particular to electromagnetic acoustic shear wave thickness measuring transducer.
Background technology
Electromagnet ultrasonic changer is the application core of electromagnetic acoustic detection technique, and probe segment is to be used to producing and receiving super
The core component of sound wave.Coil is placed in workpiece near surface, and alternation electricity is led to coil, vortex is internally formed in workpiece near surface；
Under magnetic field bias effect, alternation is vortexed by alternation Lorentz force；Particle is vortexed in the presence of alternation Lorentz force, machine is formed
Tool vibrates, and produces ultrasonic wave.
Ultrasonic applications have been highly developed technologies in material thickness measuring, but it is pressure mostly to be actually used in the probe of thickness measuring now
Electric ultrasonic probe, abbreviation piezoelectric probe.Piezoelectric probe has the advantages that manufacturing process simple, small volume, lightweight, in ultrasound
Very important effect has been played in terms of thickness measuring, but piezoelectric probe also has its weak point：Piezoelectric probe must use couplant,
And probe must be combined closely between measured piece；Piezoelectric probe is difficult to excite shear wave, and measurement accuracy is not high；Piezoelectric probe
It is not suitable for the tubing thickness measuring of minor radius.Above deficiency is that piezoelectric supersonic thickness measuring is difficult to overcome.People exert always for a long time
Power explores new ultrasonic thickness-measuring method, and the electromagnetical ultrasonic thickness-measuring method that developed recently gets up can overcome piezoelectric supersonic well
Shortcoming, can be used for the real-time thickness measuring of high temperature, and can make electromagnetic acoustic shear wave Thicknesser probe, and the speed of shear wave is compressional wave
Half or so, under same frequency, the wavelength of shear wave is half of compressional wave or so, can greatly lift the accuracy of measurement,
And will be expected to solve sheet material, the thickness measuring and automatic measuring thickness of tubing the problems such as.Electromagnetic acoustic is fitting coils magnetic field and test specimen material
Material can inspire different ultrasonic waveforms, because the coiling required precision of coil is very high, and coil shape is irregular, so making
Difficulty is very big, and the coiling precision of coil can be improved using print circuit plates making excitation coil, but is due to using printing electricity
Coil made by the plate of road only has a floor, and electromagnet ultrasonic changer conversion efficiency is very low, can cause to receive signal noise
Than very low, it is difficult to receive.
The content of the invention
Goal of the invention：
The present invention provides a kind of portable electromagnetic ultrasonic thickness measuring transducer of high conversion efficiency.From winding displacement coiling, enamel-covered wire is close
Real is wound on permanent magnet, and the utilization rate of coil is high, and cost is low and is easy to assemble and replaces, the function with thickness measuring, flaw detection.
Technical scheme：
Electromagnetic acoustic shear wave thickness measuring transducer, it is characterised in that：Including square permanent magnet, transducing coil, hand-held device, framework and
Circuit board, framework includes being provided with circuit board inside the protecting frame on the inside of shell and shell, protecting frame, and hand-held device side is outside
Shell and circuit board are simultaneously fixed together with shell and circuit board, and the opposite side of the internal circuit board of protecting frame is connected with transducing line
Circle, transducing coil is wrapped in square permanent magnet border.
The hand-held device is made up of handle, hand holding handle and interior bar, and handle is connected to hand holding handle end side, interior bar screw thread
It is connected to one end of hand holding handle.
The handle is provided with attacker's groove, and attacker's groove is that four circles laterally overlap composition.
Locking member is also associated with the hand holding handle and interior bar.
The hand holding handle is tubular structure, and side is provided with gap, and inwall is provided with internal thread, and interior bar is cylinder, and outer wall is set
There is the external screw thread matched with hand holding handle inwall internal thread, interior bar interval is provided with annular groove, and locking member and annular groove width are with slitting
Mouthful width is identical, and locking member includes locking member A and locking member B, and locking member A sides are provided with half slot A, half slot A diameters with it is interior
The annular groove interior diameter of bar matches, and locking member B sides are provided with half slot B, the overall diameter phase of half slot B diameters and hand holding handle
Match somebody with somebody.
The each side of the protecting frame is all provided with 2 rectangular support structures.
2 ox horn seats are installed, the opposite side of ox horn seat is connected with transducing coil, and circuit board is provided with the circuit board
2 wire connecting ends.
Advantage and effect：
1. the energy conversion in electromagnetic acoustic shear wave thickness measuring transducer, detection process is carried out on the surface of measured workpiece, therefore nothing
Need couplant；
2. application shear wave detection so that detection efficiency is higher, under same frequency, and the wavelength of shear wave is half of compressional wave or so,
Measurement accuracy can be lifted；
3. this product is from the combination of square permanent magnet and certain coil, to produce ultrasonic wave, rather than with electromagnet of inducting, this
Sample causes probe to be not need power supply in itself, so greatly expands the use scope of this product, the selection of coil does not have yet
There is the coil made by the conventional printed circuit board (PCB) of selection, this conventional coil only has one layer, and manufacturing cost is big, and easily damages
It is bad, and the coil that this product is turned to using winding displacement, it is not only economical but also durable；
4. in order to protect the work that inner probe is stable, devise the protective case of a probe so that probe is difficult by external force institute
Destruction；
5. hand-held device is provided with locking member, the length of interior bar stretching can be adjusted according to needed for actual conditions, so this product is suitable
The detection environment different for high temperature etc.；
6. the surface quality requirements of pair measured workpiece are not high, the design feature of electromagnet ultrasonic changer is determined：No matter test specimen
Surface it is whether coarse, cleaning without implement pretreatment, just can measure；
7. this technology is radiationless, simple to operate, with certain economy, the feature of environmental protection, security and stronger environmental suitability；
8. product various pieces can all be dismantled, it is easy to carry and changes.
Brief description of the drawings
The present invention is described in detail below in conjunction with the accompanying drawings：
Fig. 1 is electromagnetic acoustic shear wave thickness measuring transducer overall schematic；
Fig. 2 is that electromagnetic acoustic shear wave thickness measuring transducer integrally splits schematic diagram；
Fig. 3 is hand holding handle structural representation；
Fig. 4 is interior bar structural representation；
Fig. 5 is locking member structural representation；
Fig. 6 is circuit board schematic diagram；
Fig. 7 is transducing the direction of the winding current schematic diagram.
It is described to be labeled as：1. it is permanent magnet, 2. transducing coils, 3. circuit boards, 4. shells, 5. protecting frames, 6. handles, 7. hand-held
Handle, 8. interior bars, 9. attacker's grooves, 10. locking members, 11. gap, 12. annular grooves, 13. locking member A, 14. locking member B, 15. semicircles
Groove A, 16. half slot B, 17. nuts, 18. ox horns seat, 19. wire connecting ends.
Embodiment
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6, electromagnetic acoustic shear wave thickness measuring transducer, including square permanent magnet
1st, transducing coil 2, hand-held device, framework and circuit board 3, framework include the protecting frame 5 of shell 4 and the inner side of shell 4, described hand-held
Device is made up of handle 6, hand holding handle 7, interior bar 8 and locking member 10, and handle 6 is connected to the end side of hand holding handle 7, the screw thread of interior bar 8
It is connected to one end of hand holding handle 7.The hand holding handle 7 is tubular structure, and side is provided with gap 11, and inwall is provided with internal thread, interior bar 8
For cylinder, outer wall is provided with the external screw thread matched with the inwall internal thread of hand holding handle 7, and the interval of interior bar 8 is provided with annular groove 12, locked
Part 10 and the width of annular groove 12 are identical with the width of gap 11, and locking member 10 includes locking member A 13 and locking member B 14, locking member A
13 sides are provided with half slot A 15, and the diameters of half slot A 15 and the interior diameter of annular groove 12 of interior bar 8 match, locking member B 14 1
Side is provided with half slot B 16, and the overall diameter of the diameters of half slot B 16 and hand holding handle 7 matches.Handle 6 is provided with attacker's groove 9, attacker
Groove 9 is that four circles laterally overlap composition.The each side of protecting frame 5, which is all provided with inside 2 rectangular support structures, protecting frame 5, to be set
There is circuit board 3, the side of interior bar 8 of hand-held device through shell 4 and circuit board 3 and passes through front and rear 3 with shell 4 and circuit board 3
Nut 17 is fixed together, and 2 ox horn seats 18 is provided with the internal circuit board 3 of protecting frame 5, the opposite side of ox horn seat 18 is with changing
Energy coil 2 is connected, and transducing coil 2 is wrapped in the square border of permanent magnet 1.The circuit board 3 is provided with 2 wire connecting ends 19,
It is connected with high-voltage pulse signal wire.
As shown in fig. 7, circuit board 3 is acted on partly in order to fixed transducing coil 2, such fixed form is simple；Separately
One side circuit board 3 changes the sense of current, it is ensured that the sense of current is consistent in transducing coil 2.
Square permanent magnet provides the bias magnetic field of high intensity.Shear wave produced by square permanent magnet is combined with winding displacement is more steady
It is fixed, and conversion efficiency is high.The transducing coil of cylindrical magnet iron can not use winding displacement coiling, can only use printed circuit board (PCB), printing
The coil of circuit board making, conversion efficiency is low.This electromagnet ultrasonic changer is to carry out Thickness sensitivity using electromagnetic acoustic shear wave, this
The measurement accuracy that the measurement accuracy for planting transducer carries out thickness measuring using compressional wave than ever is high.
On the one hand framework fixes sonde configuration system during thickness measuring, it is ensured that probe stationary works, and falling can also obtain
Buffering is unlikely to device damage；On the other hand it is also connected with hand-held device, so connects different length hand-held device, Ke Yishi
Thickness measuring should be carried out under various circumstances.
The effect of winding displacement is the outflow of pumping signal and the outflow of echo-signal, excitation coil and echo signal reception coil
All it is this coil.
Hand-held device can be adjusted as needed changes different length, can reduce environment in the presence of a harsh environment to detection
The injury of personnel, such as hot environment.
The pumping signal produced by exciting circuit, amplifies by amplifier, accesses the input of electromagnetic acoustic shear wave transducer
End, when pumping signal flows through transducing coil, is produced bias magnetic field by square permanent magnet and is acted on, inspired in test specimen
Ultrasonic shear waves, ultrasonic transverse slat is completed to reflect on base, and the electromagnetic acoustic shear wave of reflection is received by transducing coil, is sent to reception electricity
Road, finally shows on display circuit.The thickness of test specimen is calculated by two adjacent echo soundings.
Claims (7)
1. electromagnetic acoustic shear wave thickness measuring transducer, it is characterised in that：Including square permanent magnet, transducing coil, hand-held device, framework
And circuit board, framework includes being provided with circuit board inside the protecting frame on the inside of shell and shell, protecting frame, and hand-held device side is passed through
Shell and circuit board are simultaneously fixed together with shell and circuit board, and the opposite side of the internal circuit board of protecting frame is connected with transducing line
Circle, transducing coil is wrapped in square permanent magnet border.
2. electromagnetic acoustic shear wave thickness measuring transducer according to claim 1, it is characterised in that：The hand-held device is by handle
Hand, hand holding handle and interior bar composition, handle are connected to hand holding handle end side, and interior bar is threadedly connected to one end of hand holding handle.
3. electromagnetic acoustic shear wave thickness measuring transducer according to claim 2, it is characterised in that：The handle is provided with attacker
Groove, attacker's groove is that four circles laterally overlap composition.
4. electromagnetic acoustic shear wave thickness measuring transducer according to claim 2, it is characterised in that：On the hand holding handle and interior bar
It is also associated with locking member.
5. electromagnetic acoustic shear wave thickness measuring transducer according to claim 4, it is characterised in that：The hand holding handle is tubulose knot
Structure, side is provided with gap, and inwall is provided with internal thread, and interior bar is cylinder, and outer wall is provided with to match with hand holding handle inwall internal thread
External screw thread, interior bar interval is provided with annular groove, and locking member and annular groove width are identical with gap width, and locking member includes locking member
A and locking member B, locking member A side are provided with half slot A, and the annular groove interior diameter of half slot A diameters and interior bar matches, and locks
Part B sides are provided with half slot B, and the overall diameter of half slot B diameters and hand holding handle matches.
6. electromagnetic acoustic shear wave thickness measuring transducer according to claim 1, it is characterised in that：The each side of protecting frame
All provided with 2 rectangular support structures.
7. electromagnetic acoustic shear wave thickness measuring transducer according to claim 1, it is characterised in that：It is provided with the circuit board
2 ox horn seats, the opposite side of ox horn seat is connected with transducing coil, and circuit board is provided with 2 wire connecting ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710524113.5A CN107084692A (en) | 2017-06-30 | 2017-06-30 | Electromagnetic acoustic shear wave thickness measuring transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710524113.5A CN107084692A (en) | 2017-06-30 | 2017-06-30 | Electromagnetic acoustic shear wave thickness measuring transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107084692A true CN107084692A (en) | 2017-08-22 |
Family
ID=59607237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710524113.5A Pending CN107084692A (en) | 2017-06-30 | 2017-06-30 | Electromagnetic acoustic shear wave thickness measuring transducer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760895A (en) * | 2018-04-13 | 2018-11-06 | 沈阳工业大学 | Electromagnetic acoustic elasticity modulus measurement transducer structure |
| CN109765170A (en) * | 2019-01-15 | 2019-05-17 | 西南石油大学 | A kind of outer detection device of hand-held Buried Pipeline |
| CN110375687A (en) * | 2018-04-13 | 2019-10-25 | 沈阳工业大学 | Electromagnetic ultrasonic thickness measuring transducer architecture is detected in square pipe |
| CN117288360A (en) * | 2023-11-24 | 2023-12-26 | 零声科技(苏州)有限公司 | Electromagnetic ultrasonic sensor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760895A (en) * | 2018-04-13 | 2018-11-06 | 沈阳工业大学 | Electromagnetic acoustic elasticity modulus measurement transducer structure |
| CN110375687A (en) * | 2018-04-13 | 2019-10-25 | 沈阳工业大学 | Electromagnetic ultrasonic thickness measuring transducer architecture is detected in square pipe |
| CN108760895B (en) * | 2018-04-13 | 2020-11-06 | 沈阳工业大学 | Electromagnetic ultrasonic elastic modulus measuring transducer structure |
| CN109765170A (en) * | 2019-01-15 | 2019-05-17 | 西南石油大学 | A kind of outer detection device of hand-held Buried Pipeline |
| CN109765170B (en) * | 2019-01-15 | 2021-08-20 | 西南石油大学 | Hand-held type buried pipeline corrodes outer detection device |
| CN117288360A (en) * | 2023-11-24 | 2023-12-26 | 零声科技(苏州)有限公司 | Electromagnetic ultrasonic sensor |
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Application publication date: 20170822 |