CN2090061U - Electromagnetic sound flaw deivce - Google Patents
Electromagnetic sound flaw deivce Download PDFInfo
- Publication number
- CN2090061U CN2090061U CN 91203560 CN91203560U CN2090061U CN 2090061 U CN2090061 U CN 2090061U CN 91203560 CN91203560 CN 91203560 CN 91203560 U CN91203560 U CN 91203560U CN 2090061 U CN2090061 U CN 2090061U
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- coil
- receiving coil
- magnetic field
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- metal works
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model belongs to the field of non-destructive flaw detection. The utility model is an energy converter device which is suitable for the electromagnetic ultrasonic non-destructive detection. The device adopts the electromagnetic converting method. An emitting coil is exerted the high-frequency current, and the emitting coil is adjacent to the detected workpiece. Thus, the workpiece can generate a vortex field which can generate the particle vibration under the action of a magnetic field, and as a consequence, the ultrasonic wave is formed. When the ultrasonic wave meets a defect or a scar, the returning wave can be received by a receiving coil, and then, the returning wave is amplified, identified, and alarmed. Thus, the returning wave can be displayed by a display device. The measuring device is suitable for cylindrical ferromagnetic workpieces and tubular ferromagnetic workpieces. The utility model has the advantages of high speed, no pollution.
Description
The utility model belongs to the nondestructive examination field.Be applicable to the transducer apparatus of electromagnetic ultrasonic wave Non-Destructive Testing.
As the pick-up unit of nondestructive examination, all adopt piezoelectric transducer to survey in the prior art.This transducer generally is to be made by piezoelectric monocrystal or ferroelectric polycrystalline ceramics, when it produces electrostrictive effect during at electric field action, make crystal produce elastic strain, plane of crystal forms elastic oscillation, and this fluctuation is imported measured workpiece into by acoustic coupling medium and formed elastic wave (being ultrasound wave).This effect has reversibility.Above-mentioned detection method major defect has, and detection speed is slow, wayward ultrasonic propagation pattern, and signal to noise ratio (S/N ratio) is low, need add weak points such as couplant when adjusting difficulty and detection.
It is fast that the purpose of this utility model provides a kind of detection speed, accuracy of detection height, the electromagnetic ultrasonic wave Non-Destructive Testing transducer apparatus that need not add couplant easy and simple to handle.
The principle of work of the utility model device is to adopt electromagnetism transducing method, be characterized in transmitting coil is applied with high-frequency current, and with the close tested metal works of hair line coil, make and produce the vortex field in the metal works, the vortex field produces particle vibration and forms ultrasound wave under the effect in magnetic field.Therefore constituted transmitting transducer having between the coil that applies high-frequency current, constant magnetic field and the metal works, promptly finished electrical signal conversion and become hyperacoustic process.The ultrasound wave of propagating in metal works will reflection echo when running into defective or scar, the inverse process that is accepted as emission of echo.But at least one receiving coil need be arranged in addition.The signal that receives is amplified by amplifier, is shown device through differentiating, reporting to the police and shows.This measurement mechanism is highly suitable for surface and the inner defective that detection sectional plane is cylindrical and tubular ferromagnetic metal work.But also be applicable to hyperacoustic detection of non-ferromagnetic metal material,, and choose magnetic direction, just can in the non-ferromagnetic metal material, produce ultrasound wave and carry out carrying out flaw detection as long as suitably increase magnetic field intensity.
Structure of the present utility model is described below with reference to the accompanying drawings.Accompanying drawing 1 is total work synoptic diagram of this device.In Fig. 1,1. high frequency electrical signal generator; 2. transmitting coil; 3. metal works; 4. stationary magnetic field; 5. receiving coil; 6. amplifier; 7. flaw detection signal discriminator; 8., display.By high frequency electrical signal generator 1 high-frequency current is delivered to transmitting coil 2, make coil 2 in metal works 3, produce eddy current, then the vortex field produces particle vibration and forms ultrasound wave under the effect of stationary magnetic field 4, when propagating, ultrasound wave just produces reflection echo as running into defective or termination in metal works 3, the inverse process that is received as emission of echo, by receiving coil 5, metal works 3, finish stationary magnetic field 4.And with signal amplifier 6 amplifications that receive, flaw detection signal discriminator 7 differentiates that warning and display 8 show the ultrasound wave waveform.
Accompanying drawing 2 is structural representations that the utility model pick-up unit detects circular metal workpiece.In accompanying drawing 2,9. metal works; 10. failure detector skeleton; 11., 13. receiving coils; 12. transmitting coil.Accompanying drawing 3 is another kind of patterns of accompanying drawing 2.Stationary magnetic field in accompanying drawing 2,3 apply direction, can be along radially the applying of metal works, also can axially apply along it, direction that magnetic field applies will depend on the defect situation and the flaw detection requirement that will detect.Transmitting coil 12 and receiving coil 11,13 are housed in skeleton 10 bottoms.The spacing of the detected workpiece 9 of coil 11,12,13 average departures is not more than 2mm.Angle is 8 °～15 ° between transmitting coil 12 and the receiving coil.Spacing is adjusted arbitrarily in 1～30mm between transmitting coil 12 and the receiving coil 11,13.Can see intuitively that in accompanying drawing 3 by transmitting coil 12 be to two ends emission ultrasonic signal, output is amplified again, signal is differentiated and demonstration after being accepted by receiving coil 11,13.The terminals of coil 11,12,13 are installed in the upper end of failure detector skeleton 10, and they and radio-frequency generator, amplifier etc. link.Therefore in a detection transducer apparatus, a transmitting coil is housed at least and is furnished with one to two receiving coil with each transmitting coil.
Accompanying drawing 4 can illustrate according to embodiment, in accompanying drawing 4 16, metal tube, and 14. transmitting coil skeletons; 15. receiving coil skeleton; 17. transmitting coil; 18. receiving coil; 19. be that the coil-winding spacing is half wavelength λ/2, magnetic direction is for radially, the θ angle is 13 °, and coil plane is 0.8mm apart from spacing between the metal tube 16, and metal tube 16 is done to move relative to straight line with coil rack 14,15 vertically, and detection speed is per minute 60m.
The utility model transducer apparatus sees Table 1 compared with the prior art.
Table 1, the utility model device are compared with the prior art
Claims (3)
1, a kind of electromagnetic ultrasonic wave nondestructive examination pick-up unit, this device is by high frequency signal generator 1, transmitting coil 2, tested working metal 3, stationary magnetic field 4, receiving coil 5, amplifier 6, part signal discriminator 7 and display 8 are formed, it is characterized in that the high-frequency current that high frequency signal generator 1 is produced is applied to emission circle circle 2 and makes coil 2, metal works 3 produces ultrasound wave under the effect in vortex field and magnetic field, when ultrasound examination can reflection echo during defective in metal works 3, again by receiving coil 5, metal works 3, reception is finished in stationary magnetic field 4, and received signal is delivered to amplifier 6, wounding signal Discr. 7 and display 8 show ultrasound wave.
2, according to the described device of claim 1, it is characterized in that the emission of transducer apparatus and the spacing of the tested metal works of receiving coil distance are not more than 2mm, angle is 8 °～15 ° between emission and the receiving coil, distance is 1～30mm between emission and the receiving coil.
3,, it is characterized in that being equipped with at least in the transducer apparatus transmitting coil and each transmitting coil and be furnished with 1 to 2 receiving coil according to claim 1,2 described devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91203560 CN2090061U (en) | 1991-03-13 | 1991-03-13 | Electromagnetic sound flaw deivce |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91203560 CN2090061U (en) | 1991-03-13 | 1991-03-13 | Electromagnetic sound flaw deivce |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2090061U true CN2090061U (en) | 1991-12-04 |
Family
ID=4913852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91203560 Withdrawn CN2090061U (en) | 1991-03-13 | 1991-03-13 | Electromagnetic sound flaw deivce |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2090061U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101424663B (en) * | 2008-12-05 | 2011-05-11 | 清华大学 | Gas pipeline crack electromagnetical ultrasonic oblique wave guide detecting method |
| CN101021463B (en) * | 2006-02-15 | 2012-05-30 | 通用电气公司 | Method and apparatus for porosity measurement |
| CN104597138A (en) * | 2014-12-31 | 2015-05-06 | 钢研纳克检测技术有限公司 | Spiral guided wave electromagnetic ultrasonic transducer for detecting longitudinal and transverse defects of thin-wall steel pipe |
| CN105372335A (en) * | 2015-12-14 | 2016-03-02 | 河北工业大学 | Electromagnetic ultrasonic probe |
| CN105403626B (en) * | 2015-12-14 | 2018-04-17 | 河北工业大学 | A kind of electromagnet ultrasonic changer with novel permanent magnetic device |
-
1991
- 1991-03-13 CN CN 91203560 patent/CN2090061U/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101021463B (en) * | 2006-02-15 | 2012-05-30 | 通用电气公司 | Method and apparatus for porosity measurement |
| CN101424663B (en) * | 2008-12-05 | 2011-05-11 | 清华大学 | Gas pipeline crack electromagnetical ultrasonic oblique wave guide detecting method |
| CN104597138A (en) * | 2014-12-31 | 2015-05-06 | 钢研纳克检测技术有限公司 | Spiral guided wave electromagnetic ultrasonic transducer for detecting longitudinal and transverse defects of thin-wall steel pipe |
| CN105372335A (en) * | 2015-12-14 | 2016-03-02 | 河北工业大学 | Electromagnetic ultrasonic probe |
| CN105372335B (en) * | 2015-12-14 | 2017-12-01 | 河北工业大学 | A kind of electromagnetic ultrasonic probe |
| CN105403626B (en) * | 2015-12-14 | 2018-04-17 | 河北工业大学 | A kind of electromagnet ultrasonic changer with novel permanent magnetic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |