CN202393743U - Integral transceiving switch type SH (shear horizontal) guide wave electromagnetic ultrasonic probe - Google Patents
Integral transceiving switch type SH (shear horizontal) guide wave electromagnetic ultrasonic probe Download PDFInfo
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- CN202393743U CN202393743U CN201120319917XU CN201120319917U CN202393743U CN 202393743 U CN202393743 U CN 202393743U CN 201120319917X U CN201120319917X U CN 201120319917XU CN 201120319917 U CN201120319917 U CN 201120319917U CN 202393743 U CN202393743 U CN 202393743U
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- 239000000523 sample Substances 0.000 title claims abstract description 63
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 14
- 239000010962 carbon steel Substances 0.000 claims abstract description 14
- 230000005291 magnetic effect Effects 0.000 claims abstract description 5
- 238000005086 pumping Methods 0.000 claims description 21
- 239000000126 substance Substances 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 12
- 239000003990 capacitor Substances 0.000 abstract description 9
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 230000005284 excitation Effects 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 2
- 239000000696 magnetic material Substances 0.000 abstract 2
- 125000006850 spacer group Chemical group 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000011241 protective layer Substances 0.000 abstract 1
- BLRBOMBBUUGKFU-SREVYHEPSA-N (z)-4-[[4-(4-chlorophenyl)-5-(2-methoxy-2-oxoethyl)-1,3-thiazol-2-yl]amino]-4-oxobut-2-enoic acid Chemical compound S1C(NC(=O)\C=C/C(O)=O)=NC(C=2C=CC(Cl)=CC=2)=C1CC(=O)OC BLRBOMBBUUGKFU-SREVYHEPSA-N 0.000 description 13
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
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- 239000011810 insulating material Substances 0.000 description 1
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- 239000007769 metal material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model provides an electromagnetic ultrasonic probe. The probe consists of permanent magnets, a non-magnetic material spacer, a runway-shaped plane coil, a carbon steel sheet, a probe protective layer, a shell, a capacitor and a selector switch, wherein the permanent magnets are arranged in a plurality of columns; each column comprises a plurality of permanent magnets; magnetic electrodes of adjacent permanent magnets are reversely attracted on the carbon steel sheet; the permanent magnets are separated by the non-magnetic material spacer; the runway-shaped plane coil is adhered to the lower ends of the permanent magnets; and the coils and the surface of a work-piece can keep a certain distance during detection. Through the electromagnetic ultrasonic probe disclosed by the utility model, the switch of transmission and reception of the same electromagnetic ultrasonic probe is realized by utilizing excitation signals on the coils, and all the runway-shaped coils are connected in parallel when the electromagnetic ultrasonic probe is taken as a transmission probe, thus excitation energy is strong; and all the runway-shaped coils are connected in series when the electromagnetic ultrasonic probe is taken as a receiving probe, thus the receiving sensitivity is high. The electronic ultrasonic probe disclosed by the utility model can excite and receive SH waves in a metal pipe or a flat plate, and the pipe and the flat plate can be subjected to defect detection only by one probe.
Description
Technical field
The utility model relates to the electromagnetic acoustic detection technique, specifically is a kind ofly to be the master, can to encourage in the flat board in the SH guided wave and pipe wall the circumferentially electromagnetic ultrasonic probe of SH ripple with the Lorentz force type.
Background technology
Ultrasound detection is being widely used aspect the material Nondestructive Evaluation; Electromagnetic ultrasonic probe (Electromagnetic Acoustic Transducer; Be called for short EMAT) compare with conventional piezoelectric formula ultrasonic probe; Have and need not couplant, surface of the work and need not pre-service, advantage that detection efficiency is high, be fit to sheet metal, bar and pipe detection.EMAT mainly is divided into two types according to exiting principle, Lorentz force type and magnetostriction type.The conversion efficiency of magnetostriction type EMAT is higher, detects but only be fit to ferrimagnet such as carbon steel.Lorentz force type EMAT is fit to the detection of conductive material, and range of application is wider.The emission EMAT of guided wave detection usefulness is different with the number of turn with the loop construction that receives EMAT generally speaking, and in order to reach best fillip and receiving sensitivity, the EMAT that therefore transmits and receives usefulness separates.Be integrated with reception EMAT if will launch EMAT, guarantee that simultaneously the fillip and the receiving sensitivity of probe is not less than separate type EMAT, then will be practical more in industrial detection.
Ultrasonic guided wave detection technology is a kind of emerging Dynamic Non-Destruction Measurement, need not the pointwise scanning, once can detect an one flat plate or a segment pipe, has the high advantage of detection efficiency.If electromagnetic acoustic and guided wave technology are integrated one, bring into play its advantage separately, so just can realize non-contacting fast detecting, this has broad application prospects in industrial circle.In recent years; The domestic electromagnetic ultrasonic probe that the SH guided wave also occurs; Designed like Chinese patent CN102023186A and can encourage the electromagnetic ultrasonic probe of SH ripple to carry out pipe detection; Transmitting and receiving probe and be separate and also adopt magnet more, probe size is bigger, and echo analysis is complicated.Make things convenient for practical application in order to reduce probe size, design the SH guided wave EMAT that transmits and receives one, can realize the fast detecting of pipeline or tank plate etc.
Summary of the invention
The purpose of the utility model is to provide a kind of pumping signal that adopts to realize launching/receiving the incorporate SH guided wave electromagnetic ultrasonic probe of receiving and dispatching switching; Have the advantages that structural design is simple, fillip is strong, receiving sensitivity is high, can carry out slab and large diameter pipeline and detect.
The utility model specifically provides a kind of integrated transmitting-receiving suitching type SH guided wave electromagnetic ultrasonic probe, and it is characterized in that: said electromagnetic ultrasonic probe is made up of a pair of or a pair of above permanent magnet, nonmagnetic substance partition, two or more track shape planar coils, carbon steel coupon, probe protective seam, housing, electric capacity and change-over switch; Wherein permanent magnet is lined up some row; Every row several, the magnetic pole of adjacent permanent magnets is pull-in on the carbon steel coupon at top on the contrary, is separated by the nonmagnetic substance sheet between the magnet; The track shape planar coil that two or more physical dimensions are identical sticks on the permanent magnet lower end; Connect into circuit with n planar coil and 2n-1 change-over switch and n-1 electric capacity, control the consistent break-makes of all change-over switches with the probe pumping signal through rectifying and wave-filtering, the pumping signal that is about to pop one's head in is added to all change-over switches control utmost points behind rectifying and wave-filtering; Make all change-over switch conductings, realize that all track shape planar coils and all electric capacity are parallelly connected on circuit; When no pumping signal or driving voltage were lower than change-over switch conducting minimum voltage, all change-over switches were off state, and for connecting, wherein n is the integer more than or equal to 2 on circuit for all track shape planar coils and all electric capacity.
The said integrated transmitting-receiving suitching type SH guided wave electromagnetic ultrasonic probe of the utility model, it is characterized in that: said nonmagnetic substance partition is non-magnet_conductible materials such as the plastic sheet or the scraps of paper.
The said integrated transmitting-receiving suitching type SH guided wave electromagnetic ultrasonic probe of the utility model is characterized in that: the racetrack-type rotor coil that racetrack-type rotor coil that said track shape planar coil is the enameled wire coiling or flexible print circuit board PCB process.
The said integrated transmitting-receiving suitching type SH guided wave electromagnetic ultrasonic probe of the utility model is characterized in that: the length of said nonmagnetic substance sheet, width are identical with length, the width of permanent magnet, and the thickness of nonmagnetic substance sheet can change as required.
The transmitting-receiving suitching type SH guided wave electromagnetic ultrasonic probe that the utility model provides, its probe protective seam is processed by insulating material such as plastics or corundum sheets, and length, width are slightly larger than length, the width of group of magnets, and its thickness is decided according to the actual requirements.Probing shell is assembled by some carbon steel sheet.
The utility model also has following technical characterictic:
(1) pumping signal is the tone-burst of frequency 20kHz to 5MHz, can add the Hanning window and modulate or do not add.
(2) capacitance that changes each electric capacity realizes that the pumping signal phase place is consistent on three coils.
(3) utilize the identical track shape planar coil of physical dimension to stack and come together, come the break-make of control its switch, realize the switching of electromagnetic ultrasonic probe emission/reception through pumping signal.
During (4) as the emission electromagnetic ultrasonic probe, all track shape planar coils are parallel connection on circuit, and excitation energy is big; During as the reception electromagnetic ultrasonic probe, all track shape planar coils are series connection on circuit, and receiving sensitivity is high.
The electromagnetic ultrasonic probe of the utility model leans on Lorentz force excitation SH ripple on nonmagnetic material, on ferromagnetic metal material, rely on Lorentz force and magnetostrictive force to encourage the SH ripple, can motivate SH according to the size of plate or pipeline
0Mould, SH
1Mould, SH
2Mould etc.
Description of drawings
The vertical view of Fig. 1 electromagnetic ultrasonic probe (magnet top carbon steel coupon does not draw);
The longitudinal cross-section view of Fig. 2 electromagnetic ultrasonic probe;
The viewgraph of cross-section of Fig. 3 electromagnetic ultrasonic probe;
Fig. 4 electromagnetic ultrasonic probe emission/reception commutation circuit schematic diagram;
Fig. 5 is applied to the pumping signal synoptic diagram on the runway coil;
The vertical view of Fig. 6 electromagnetic ultrasonic probe (magnet top carbon steel coupon does not draw);
The longitudinal cross-section view of Fig. 7 electromagnetic ultrasonic probe;
The viewgraph of cross-section of Fig. 8 electromagnetic ultrasonic probe;
Fig. 9 electromagnetic ultrasonic probe emission/reception commutation circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified:
Shown in Fig. 1～4; Transmitting-receiving suitching type SH guided wave electromagnetic ultrasonic probe is made up of carbon steel coupon 5, probe protective seam, housing, capacitor C 1, C2 and change-over switch S1, S2, S3, S4, the S5 at eight permanent magnets 1, three track shape planar coils 3 that physical dimension is identical, nonmagnetic substance sheet 2, permanent magnet 1 top, and 6 represent workpiece to be detected.
Wherein permanent magnet 1 is a Nd-Fe-B permanent magnet; Eight permanent magnet 1 magnetic poles are alternately arranged and are pull-in on the carbon steel coupon 5 at top; Separate with nonmagnetic substance sheet 2 (plastic sheet or the scraps of paper) between the magnet; Three track shape planar coils 3 stick on permanent magnet 1 lower end, and three track shape planar coils 3 are pressed Fig. 4 form CC with change-over switch S1, S2, S3, S4, S5 and capacitor C 1, C2.Apply pumping signal shown in Figure 5, just can in workpiece, motivate the alternation Lorentz force, thereby in workpiece, form the SH guided wave; When no pumping signal, probe automatically switches to and receives EMAT, receives dull and stereotyped or ducted ultrasound wave.
Wherein:
(1) pumping signal is the tone-burst of frequency 20kHz to 5MHz, can add the Hanning window and modulate or do not add.
(2) utilizing three identical track shape planar coils 3 of physical dimension to stack comes together; Planar coil 3 connects by the mode of Fig. 4 with change-over switch S1, S2, S3, S4, S5 and capacitor C 1, C2; The probe pumping signal is controlled the consistent break-make of all change-over switches behind rectifying and wave-filtering, realize the switching of emission/reception SH ripple.
(3) change capacitor C 1, C2 size can realize that the pumping signal phase place is consistent on three coils.
During (4) as the emission electromagnetic ultrasonic probe, three track shape planar coils 3 are parallel connection on circuit, and excitation energy is big; During as the reception electromagnetic ultrasonic probe, three track shape planar coils 3 are series connection on circuit, and receiving sensitivity is high.
Shown in Fig. 6～9; Transmitting-receiving suitching type SH guided wave electromagnetic ultrasonic probe is made up of carbon steel coupon 5, probe protective seam, housing, capacitor C 1, C2, C3 and change-over switch S1, S2, S3, S4, S5, S6, the S7 at 12 permanent magnets 1, four track shape planar coils 3 that physical dimension is identical, nonmagnetic substance sheet 2, permanent magnet 1 top, and 6 represent workpiece to be detected.
Wherein permanent magnet 1 is a Nd-Fe-B permanent magnet; 12 permanent magnet 1 magnetic poles are alternately arranged and are pull-in on the carbon steel coupon 5 at top; Separate with nonmagnetic substance sheet 2 (plastic sheet or the scraps of paper) between the magnet; Four track shape planar coils 3 stick on permanent magnet 1 lower end, and three track shape planar coils 3 are pressed Fig. 9 form CC with change-over switch S1, S2, S3, S4, S5, S6, S7 and capacitor C 1, C2, C3.Apply pumping signal shown in Figure 5, just can in workpiece, motivate the alternation Lorentz force, thereby in workpiece, form the SH guided wave; When no pumping signal, probe automatically switches to and receives EMAT, receives dull and stereotyped or ducted ultrasound wave.
Wherein:
(1) pumping signal is the tone-burst of frequency 20kHz to 5MHz, can add the Hanning window and modulate or do not add.
(2) utilizing four identical track shape planar coils 3 of physical dimension to stack comes together; Planar coil 3 connects by the mode of Fig. 9 with change-over switch S1, S2, S3, S4, S5, S6, S7 and capacitor C 1, C2, C3; The probe pumping signal is controlled the consistent break-make of all change-over switches behind rectifying and wave-filtering, realize the switching of emission/reception SH ripple.
(3) change capacitor C 1, C2, C3 size can realize that the pumping signal phase place is consistent on four coils.
During (4) as the emission electromagnetic ultrasonic probe, four track shape planar coils 3 are parallel connection on circuit, and excitation energy is big; During as the reception electromagnetic ultrasonic probe, four track shape planar coils 3 are series connection on circuit, and receiving sensitivity is high.
Claims (4)
1. integrated transmitting-receiving suitching type SH guided wave electromagnetic ultrasonic probe, it is characterized in that: said electromagnetic ultrasonic probe is made up of a pair of or a pair of above permanent magnet, nonmagnetic substance partition, two or more track shape planar coils, carbon steel coupon, probe protective seam, housing, electric capacity and change-over switch;
Wherein permanent magnet is lined up some row; Every row several, the magnetic pole of adjacent permanent magnets is pull-in on the carbon steel coupon at top on the contrary, is separated by the nonmagnetic substance sheet between the magnet; The track shape planar coil that two or more physical dimensions are identical sticks on the permanent magnet lower end; Connect into circuit with n planar coil and 2n-1 change-over switch and n-1 electric capacity, control the consistent break-makes of all change-over switches with the probe pumping signal through rectifying and wave-filtering, the pumping signal that is about to pop one's head in is added to all change-over switches control utmost points behind rectifying and wave-filtering; Make all change-over switch conductings, realize that all track shape planar coils and all electric capacity are parallelly connected on circuit; When no pumping signal or driving voltage were lower than change-over switch conducting minimum voltage, all change-over switches were off state, and for connecting, wherein n is the integer more than or equal to 2 on circuit for all track shape planar coils and all electric capacity.
2. according to the said integrated transmitting-receiving suitching type SH guided wave electromagnetic ultrasonic probe of claim 1, it is characterized in that: said nonmagnetic substance partition is a non-magnet_conductible material.
3. according to the said integrated transmitting-receiving suitching type SH guided wave electromagnetic ultrasonic probe of claim 1, it is characterized in that: the racetrack-type rotor coil that racetrack-type rotor coil that said track shape planar coil is the enameled wire coiling or flexible print circuit board PCB process.
4. according to the said integrated transmitting-receiving suitching type SH guided wave electromagnetic ultrasonic probe of claim 1, it is characterized in that: the length of said nonmagnetic substance sheet, width are identical with length, the width of permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120319917XU CN202393743U (en) | 2011-08-30 | 2011-08-30 | Integral transceiving switch type SH (shear horizontal) guide wave electromagnetic ultrasonic probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120319917XU CN202393743U (en) | 2011-08-30 | 2011-08-30 | Integral transceiving switch type SH (shear horizontal) guide wave electromagnetic ultrasonic probe |
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| Publication Number | Publication Date |
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| CN202393743U true CN202393743U (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120319917XU Expired - Fee Related CN202393743U (en) | 2011-08-30 | 2011-08-30 | Integral transceiving switch type SH (shear horizontal) guide wave electromagnetic ultrasonic probe |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879478A (en) * | 2011-10-24 | 2013-01-16 | 南通天华和睿科技创业有限公司 | Electromagnetic ultrasonic detection probe |
| CN102967658A (en) * | 2012-12-07 | 2013-03-13 | 钢铁研究总院 | Electromagnetic ultrasonic energy converter for automatic detection of surface of steel rod |
| CN103743823A (en) * | 2014-01-20 | 2014-04-23 | 厦门大学 | Electromagnetic ultrasonic probe with variable structure |
| CN104297347A (en) * | 2014-10-24 | 2015-01-21 | 广西电网公司电力科学研究院 | Grounding flat steel ultrasonic guided wave testing electro-magnetic acoustic transducer |
| CN106645400A (en) * | 2016-10-14 | 2017-05-10 | 清华大学 | Ultrasonic guided wave online detection device of high-temperature pipeline based on T-shaped waveguide structure |
| CN107085042A (en) * | 2016-12-16 | 2017-08-22 | 湖北工业大学 | A kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating |
| CN108593784A (en) * | 2018-03-28 | 2018-09-28 | 江苏大学 | A kind of contactless electromagnet ultrasonic changer and detection method that can generate torsion guided wave |
| CN110174466A (en) * | 2019-05-29 | 2019-08-27 | 湖北工业大学 | A kind of electromagnetic acoustic incentive probe and its construction method |
| CN111380961A (en) * | 2020-03-31 | 2020-07-07 | 南昌航空大学 | Electromagnetic ultrasonic probe for detecting ultrahigh-temperature casting and forging pieces and online rapid detection method |
| CN111426756A (en) * | 2020-05-13 | 2020-07-17 | 南昌航空大学 | High-order SH guided wave imaging detection method and system for rail bottom crack of steel rail |
-
2011
- 2011-08-30 CN CN201120319917XU patent/CN202393743U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879478A (en) * | 2011-10-24 | 2013-01-16 | 南通天华和睿科技创业有限公司 | Electromagnetic ultrasonic detection probe |
| CN102967658A (en) * | 2012-12-07 | 2013-03-13 | 钢铁研究总院 | Electromagnetic ultrasonic energy converter for automatic detection of surface of steel rod |
| CN103743823A (en) * | 2014-01-20 | 2014-04-23 | 厦门大学 | Electromagnetic ultrasonic probe with variable structure |
| CN103743823B (en) * | 2014-01-20 | 2015-12-09 | 厦门大学 | A kind of varistructured electromagnetic ultrasonic probe |
| CN104297347A (en) * | 2014-10-24 | 2015-01-21 | 广西电网公司电力科学研究院 | Grounding flat steel ultrasonic guided wave testing electro-magnetic acoustic transducer |
| CN106645400A (en) * | 2016-10-14 | 2017-05-10 | 清华大学 | Ultrasonic guided wave online detection device of high-temperature pipeline based on T-shaped waveguide structure |
| CN107085042A (en) * | 2016-12-16 | 2017-08-22 | 湖北工业大学 | A kind of SH ripple electromagnet ultrasonic changers for focusing on and commutating |
| CN107085042B (en) * | 2016-12-16 | 2018-07-24 | 湖北工业大学 | A kind of SH wave electromagnet ultrasonic changers for focusing and commutating |
| CN108593784A (en) * | 2018-03-28 | 2018-09-28 | 江苏大学 | A kind of contactless electromagnet ultrasonic changer and detection method that can generate torsion guided wave |
| CN110174466A (en) * | 2019-05-29 | 2019-08-27 | 湖北工业大学 | A kind of electromagnetic acoustic incentive probe and its construction method |
| CN111380961A (en) * | 2020-03-31 | 2020-07-07 | 南昌航空大学 | Electromagnetic ultrasonic probe for detecting ultrahigh-temperature casting and forging pieces and online rapid detection method |
| CN111426756A (en) * | 2020-05-13 | 2020-07-17 | 南昌航空大学 | High-order SH guided wave imaging detection method and system for rail bottom crack of steel rail |
| CN111426756B (en) * | 2020-05-13 | 2023-06-16 | 南昌航空大学 | High-order SH guided wave imaging detection method and system for rail bottom crack of steel rail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20130830 |