CN202305485U - Electromagnetic ultrasonic detection probe - Google Patents
Electromagnetic ultrasonic detection probe Download PDFInfo
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- CN202305485U CN202305485U CN2011204071826U CN201120407182U CN202305485U CN 202305485 U CN202305485 U CN 202305485U CN 2011204071826 U CN2011204071826 U CN 2011204071826U CN 201120407182 U CN201120407182 U CN 201120407182U CN 202305485 U CN202305485 U CN 202305485U
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Abstract
The utility model discloses an electromagnetic ultrasonic detection probe. The electromagnetic ultrasonic detection probe consists of one or more pairs of permanent magnets, a non-magnetic material diaphragm, two or more raceway-shaped planar coils, a carbon-steel sheet, a probe protecting layer, a shell, a capacitor and a switching switch, and is characterized in that: the raceway-shaped planar coils are the raceway-shaped coils which are formed by winding enameled wires or are made of flexible printed circuit boards (PCB). Switching between transmitting and receiving of the same electromagnetic ultrasonic probe is realized by exciting signals on the coils; when the ultrasonic probe serves as a transmitting probe, all the raceway-shaped coils are connected in parallel and the excitation energy is strong; and when the ultrasonic probe serves as a receiving probe, all the raceway-shaped coils are connected in series and the receiving sensitivity is high. The electromagnetic ultrasonic detection probe can excite and receive SH waves in a metal pipe or a flat plate, so defect detection on the pipe and the flat plate can be performed by only 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
Ultra 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.
People expect to obtain the good electromagnetic acoustic detection probe of a kind of technique effect.
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 electromagnetic acoustic detection probe, and 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; 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 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 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 etc.
Make things convenient for practical application for reducing probe size, design the SH guided wave EMAT that transmits and receives one, can realize the fast detecting of pipeline or tank plate 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 vertical view of Fig. 3 electromagnetic ultrasonic probe (magnet top carbon steel coupon does not draw);
The longitudinal cross-section view of Fig. 4 electromagnetic ultrasonic probe.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified:
Embodiment 1
Like Fig. 1, shown in 2; 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.
Claims (2)
1. electromagnetic acoustic detection probe, 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 at least 3 row; At least 3 of every row, the magnetic pole of adjacent permanent magnets are pull-in on the carbon steel coupon at top on the contrary, are 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; 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.
2. according to the said electromagnetic acoustic detection 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 |
|---|---|---|---|
| CN2011204071826U CN202305485U (en) | 2011-10-24 | 2011-10-24 | Electromagnetic ultrasonic detection probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204071826U CN202305485U (en) | 2011-10-24 | 2011-10-24 | Electromagnetic ultrasonic detection probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202305485U true CN202305485U (en) | 2012-07-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204071826U Expired - Fee Related CN202305485U (en) | 2011-10-24 | 2011-10-24 | Electromagnetic ultrasonic detection probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202305485U (en) |
Cited By (8)
| 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 |
| 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 |
| CN105004797A (en) * | 2015-07-24 | 2015-10-28 | 广州彩磁信息技术有限公司 | Object detection method and device based on constant electromagnetic source motor variable frequency induction field |
| CN110043810A (en) * | 2019-05-23 | 2019-07-23 | 山东省科学院激光研究所 | Detection method, the packaging method of sensor and sensor of defect of pipeline |
| CN114441641A (en) * | 2022-01-29 | 2022-05-06 | 西安交通大学 | Longitudinal wave type electromagnetic ultrasonic probe and detection method |
| CN114858106A (en) * | 2022-03-31 | 2022-08-05 | 西安交通大学 | Longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe |
| CN117233263A (en) * | 2023-11-15 | 2023-12-15 | 中北大学 | Narrow-sound-beam electromagnetic ultrasonic sensor and device for detecting defects in axial direction of pipeline |
-
2011
- 2011-10-24 CN CN2011204071826U patent/CN202305485U/en not_active Expired - Fee Related
Cited By (11)
| 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 |
| 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 |
| CN105004797A (en) * | 2015-07-24 | 2015-10-28 | 广州彩磁信息技术有限公司 | Object detection method and device based on constant electromagnetic source motor variable frequency induction field |
| CN105004797B (en) * | 2015-07-24 | 2019-02-12 | 广州丰谱信息技术有限公司 | Object detecting method and device based on constant electromagnetic source alternation induction field |
| CN110043810A (en) * | 2019-05-23 | 2019-07-23 | 山东省科学院激光研究所 | Detection method, the packaging method of sensor and sensor of defect of pipeline |
| CN114441641A (en) * | 2022-01-29 | 2022-05-06 | 西安交通大学 | Longitudinal wave type electromagnetic ultrasonic probe and detection method |
| CN114441641B (en) * | 2022-01-29 | 2023-09-26 | 西安交通大学 | Longitudinal wave type electromagnetic ultrasonic probe and detection method |
| CN114858106A (en) * | 2022-03-31 | 2022-08-05 | 西安交通大学 | Longitudinal wave-transverse wave integrated electromagnetic ultrasonic probe |
| CN117233263A (en) * | 2023-11-15 | 2023-12-15 | 中北大学 | Narrow-sound-beam electromagnetic ultrasonic sensor and device for detecting defects in axial direction of pipeline |
| CN117233263B (en) * | 2023-11-15 | 2024-02-06 | 中北大学 | Narrow-sound-beam electromagnetic ultrasonic sensor and device for detecting defects in axial direction of pipeline |
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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: 20120704 Termination date: 20121024 |