CN219842376U - SH 0 Modal electromagnetic ultrasonic sensor - Google Patents
SH 0 Modal electromagnetic ultrasonic sensor Download PDFInfo
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- CN219842376U CN219842376U CN202321097515.9U CN202321097515U CN219842376U CN 219842376 U CN219842376 U CN 219842376U CN 202321097515 U CN202321097515 U CN 202321097515U CN 219842376 U CN219842376 U CN 219842376U
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- 230000000737 periodic effect Effects 0.000 claims abstract description 34
- 230000005284 excitation Effects 0.000 claims abstract description 21
- 230000002441 reversible effect Effects 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 abstract description 24
- 238000003466 welding Methods 0.000 abstract description 14
- 238000013461 design Methods 0.000 abstract description 8
- 230000006978 adaptation Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 18
- 239000010959 steel Substances 0.000 description 18
- 230000007547 defect Effects 0.000 description 12
- 238000009826 distribution Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model discloses SH 0 The modal electromagnetic ultrasonic sensor comprises a periodic permanent magnet array combination, a sensor excitation coil and a through hole, wherein the sensor excitation coil is designed by adopting a double-cluster reverse coil, the periodic permanent magnet array combination is arranged at the position of a long straight wire of the double-cluster reverse coil, and each group of periodic permanent magnets corresponds to each cluster of reverse excitation coil. Magnet array design of periodic permanent magnet type electromagnetic acoustic sensor, and adaptation of target excitation frequencySH at Rate 0 The mode ultrasonic wave wavelength, meanwhile, a conventional runway type exciting coil is developed into a double-layer double-cluster reverse coil, the size of two ends of the exciting coil of the sensor is reduced, and compact SH is optimized 0 And the geometric structure of the modal electromagnetic ultrasonic sensor reduces the welding line detection blind area at the arcing and arc falling positions.
Description
Technical Field
The utility model relates to the field of ultrasonic nondestructive testing, in particular to SH 0 A modal electromagnetic ultrasonic sensor.
Background
In the form of steel structure assembled building, steel components and accessories manufactured by factory processing are transported to a building construction site, and assembled and installed on the site in a welding mode. According to the current national standard of steel structural design Specification and the manual ultrasonic flaw detection method and quality classification method of steel welding seams, the primary welding seams should be subjected to 100% ultrasonic detection. The arc starting and falling positions of the welding seam are often influenced by welding process parameters, welding materials, temperature and the like, and concave welding junctions (namely arc pits) and the like are often generated due to incapability of penetration, so that the defects have great influence on bearing capacity, and stress concentration is easy to generate cracks after stress. Therefore, the detection of the weld at the arcing and the drop arc needs to be focused.
Ultrasonic inspection is a nondestructive inspection method for inspecting defects by propagating ultrasonic waves inside a metal member. Ultrasonic detection techniques are classified into piezoelectric ultrasonic detection and electromagnetic ultrasonic detection according to the principle of ultrasonic generation. The piezoelectric material in the piezoelectric ultrasonic sensor generates mechanical vibration under the action of piezoelectric effect, vibration energy is transmitted to the steel structure through the couplant and propagates in the steel structure in an ultrasonic mode, so that the piezoelectric ultrasonic detection technology has higher requirements on the surface of a test piece, and the surface of the steel structure needs to be polished and coated with the couplant. When the piezoelectric ultrasonic detection technology is adopted to detect the weld defects of the steel structure, the polishing process of the surface of the component consumes a great deal of labor and time cost.
The electromagnetic ultrasonic detection technology is based on the electromagnetic induction principle, a power-on coil provides a moving magnetic field, and a magnet provides a static magnetic field. The dynamic and static magnetic fields act in the test piece to generate a stress wave source to excite ultrasonic waves, so that the electromagnetic ultrasonic detection technology has the advantages of non-contact and no need of coupling. The electromagnetic ultrasonic sensor can realize the excitation and the reception of the ultrasonic wave of the target mode through the structural design of the magnet and the coil. Wherein SH 0 The mode horizontal shear wave has the characteristics of no dispersion, constant wave speed, no mode conversion at the boundary and difficult mode conversion after the action of the mode horizontal shear wave and the defect, has the advantage of easy analysis and identification of detection signals, and is suitable for the detection of the welding seam of the steel structure.
In order to avoid ultrasonic detection blind areas of welding seams at the arc starting and arc falling positions, the influence of end face reflection echoes is reduced, the analysis difficulty of received direct wave signals is reduced, and SH with concentrated sound field is developed 0 The modal horizontal shearing modal electromagnetic ultrasonic sensor is necessary for improving the recognition capability of weld defects at the arc starting and arc falling positions.
Disclosure of Invention
The object of the present utility model is to provide SH 0 The modal electromagnetic ultrasonic sensor aims to solve the technical problem of steel structure weld defect detection, and from the structural optimization design of the sensor, the magnet configuration (width and number) and the size of the reverse part of the exciting coil are adjusted, so that SH with concentrated exciting sound field is obtained 0 And the mode horizontal shear wave reduces the influence of end surface reflection echo and reduces weld defect detection blind areas at the arc starting and falling positions.
To achieve the above purpose, the utility modelThe following technical scheme is adopted: SH 0 A modal electromagnetic ultrasonic sensor, wherein the sensor comprises a periodic permanent magnet array combination, a sensor excitation coil and a via hole 3,
the sensor excitation coil is designed by adopting a double-cluster reverse-folded coil 2, the periodic permanent magnet array combination is arranged at the position of a long straight wire of the double-cluster reverse-folded coil 2, and each group of periodic permanent magnets corresponds to each cluster of reverse-folded excitation coil.
Further, the magnetizing direction of the periodic permanent magnet is the thickness direction of the magnet, and the magnetic pole directions between adjacent single permanent magnets are opposite when the periodic permanent magnet is placed.
Further, the width of the individual permanent magnets in the periodic permanent magnet array combination is equal to the designed excitation SH 0 Half of the modal guided wave wavelength.
Further, the height of the single permanent magnet is 5mm, the length is 18mm, and the width is 10mm.
Further, the single cluster is composed of 8 long straight wires, the wire spacing is 1mm, the length of each long straight wire is 32mm, and the effective working length is 30mm.
Further, the single cluster of return coils has an effective working length of 60mm.
Further, the periodic magnet array combination is positioned right above the long straight wire part of the double-cluster reverse turn coil 2.
The beneficial effects of the utility model are as follows:
1 SH provided by the utility model 0 The design of a magnet array of a modal electromagnetic ultrasonic sensor and a periodic permanent magnet electromagnetic acoustic sensor is adapted to SH under target excitation frequency 0 The mode ultrasonic wave wavelength, meanwhile, a conventional runway type exciting coil is developed into a double-layer double-cluster reverse coil, the size of two ends of the exciting coil of the sensor is reduced, and compact SH is optimized 0 And the geometric structure of the modal electromagnetic ultrasonic sensor reduces the welding line detection blind area at the arcing and arc falling positions.
2 SH provided by the utility model 0 The mode electromagnetic ultrasonic sensor belongs to the field of ultrasonic nondestructive detection, and can excite horizontal shearing mode ultrasonic waves in a metal plate of a steel column or a steel beam, and has good sound field directivity and can reduce the ultrasonic wavesInterference influence, improve steel column and girder steel welding seam defect detection ability.
3 SH provided by the utility model 0 The mode electromagnetic ultrasonic sensor adopts a double-layer double-cluster reverse coil design for an excitation coil, so that the size of the end part of the sensor is reduced, and the strength of induced eddy current is improved.
4 SH provided by the utility model 0 The mode electromagnetic ultrasonic sensor is compact in structure, the effective working length of the exciting coil is concentrated under the permanent magnet array, the sound field distribution excited by the sensor is effectively concentrated, the end face echo is restrained, and the detection capability of the sensor is improved.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The primary object and other advantages of the utility model may be realized and attained by means of the instrumentalities and particularly pointed out in the specification.
Drawings
The utility model is described in further detail below with reference to the accompanying drawings.
Fig. 1 is an improved double-cluster turn-around coil compact SH 0 Schematic structural diagram of modal electromagnetic ultrasonic sensor;
FIG. 2 is a schematic illustration of a monolithic permanent magnet;
FIGS. 3a, 3b are schematic diagrams of a double-cluster turn-back coil;
fig. 4 is a modified double-cluster turn-around coil compact SH 0 A finite element simulation model of the modal electromagnetic ultrasonic sensor;
FIG. 5 is a simulation model of a conventional periodic permanent magnet type electromagnetic acoustic sensor;
FIG. 6 is a graph showing a comparison of two sensor sound field distributions;
fig. 7 is a modified double-cluster turn-around coil compact SH 0 Schematic diagram of welding line detection of modal electromagnetic ultrasonic sensor.
Reference numerals: 1-periodic permanent magnet array combination, 2-double-cluster reverse-folded coil and 3-via hole.
Detailed Description
The following examples are given by way of illustration only and are not to be construed as limiting the scope of the utility model.
Specifically, improved double-cluster reverse-turn coil compact SH 0 The device comprises a modal electromagnetic ultrasonic sensor, a periodic permanent magnet array combination 1, a sensor excitation coil and a through hole 3, wherein the sensor excitation coil is designed by adopting a double-cluster reverse-folded coil 2, the periodic permanent magnet array combination 1 is arranged at the position of a long straight wire of the double-cluster reverse-folded coil 2, and each group of periodic permanent magnets corresponds to each cluster of reverse-folded excitation coil.
The magnetizing direction of the periodic permanent magnet is the thickness direction of the magnet, and the magnetic pole directions of adjacent single permanent magnets are opposite when the permanent magnet is placed. The width of the single permanent magnet in the periodic permanent magnet array combination 1 is equal to the designed excitation SH 0 Half of the modal guided wave wavelength.
Fig. 1 shows a compact SH of an improved double-cluster turn-around coil 2 0 The modal electromagnetic acoustic sensor is schematically illustrated in fig. 2, which is a single magnet, and fig. 3a and 3b are schematic illustrations of a double-cluster return coil 2.
Fig. 4 is a diagram of a compact SH for creating an improved double-cluster turn-around coil 2 0 A three-dimensional finite element simulation model of a modal electromagnetic acoustic sensor. Monolithic magnet width dimensions equal to the target frequency excitation SH 0 Half of the modal guided wave wavelength. A hanning window modulated sinusoidal signal with excitation frequency f=80 kHz and amplitude 1A was selected and the current on the double cluster turn-around coil 2 was opposite.
The height h of the single permanent magnet is 5mm, the length l is 18mm, and the width w is 10mm. Two rows of periodic permanent magnets are arranged in the periodic permanent magnet array combination 1, each row of periodic permanent magnet array combination 1 is composed of three permanent magnets, and magnetic poles of adjacent permanent magnets are opposite.
The double-cluster reverse-folded coil 2 adopts a double-layer structure, a single cluster consists of 8 long straight wires, the wire spacing is 1mm, and the length of a single long straight wire is 32mm. The effective working length of the single-cluster reverse-folded coil is 30mm. The length of the double-cluster long straight wire is 62mm. The effective working length is 60mm.
The periodic magnet array is positioned right above the long straight wire part of the double-cluster reverse turn coil 2.
Through finite element simulation research, the improved double-cluster reverse turn coil 2 compact SH is obtained 0 Modal electromagnetic acoustic sensor sound field distribution.
A simulation model of a conventional periodic permanent magnet type electromagnetic acoustic sensor is established as shown in fig. 5. Comparison analysis improved double-cluster reverse-folded coil 2 compact SH 0 Modal electromagnetic ultrasonic sensor and traditional conventional SH 0 The sound field distribution characteristics of the modal electromagnetic ultrasonic sensor.
And collecting the maximum value of the amplitude of the direct wave at the half circumference of 100mm from the center of the sensor, and comparing the sound field distribution of the two sensors, wherein a result diagram is shown in fig. 6. From the sound field distribution, the improved double-cluster reverse coil 2 compact SH 0 The sound field radiation angle of the modal electromagnetic ultrasonic sensor is +/-20 degrees, the sound field radiation angle of the conventional periodic permanent magnet type electromagnetic acoustic sensor is +/-30 degrees, and the improved double-cluster inflection coil 2 is compact SH 0 The sound field of the modal electromagnetic ultrasonic sensor is more concentrated.
The utility model designs an improved double-cluster reverse-folded coil 2 compact SH 0 The mode electromagnetic acoustic sensor adopts a combination of a periodic permanent magnet array and a double-cluster reverse coil 2, shortens the size of a non-working area of an excitation coil, reduces weld defect detection blind areas at arcing and arc falling positions through a double-cluster reverse coil structure design, and improves the compact SH of the double-cluster reverse coil 2 0 Schematic diagram of the detection of the welding line of the modal electromagnetic ultrasonic sensor is shown in fig. 7. Compact SH through improved double-cluster reverse turn coil 2 0 The comparison of sound field distribution of the modal electromagnetic acoustic sensor and the conventional periodic permanent magnet type electromagnetic acoustic sensor shows that the designed improved double-cluster inflection coil 2 compact SH 0 The modal electromagnetic acoustic sensor sound field is more concentrated. SH 0 The sound field of the modal electromagnetic ultrasonic sensor is concentrated, and defect misjudgment caused by echo interference of the end face of the component is reduced.
The improved double-cluster reverse-folded coil 2 compact SH provided by the utility model 0 The modal electromagnetic ultrasonic sensor, the double-cluster reverse-folded coil 2 and the periodic permanent magnet array combination 1 can enhance the generation of the sensorThe ultrasonic energy improves the signal-to-noise ratio of the received signal and improves the defect identification capability on the ultrasonic propagation path.
When the ultrasonic sensor is used, horizontal shearing mode ultrasonic waves can be excited in the metal plate of the steel column or the steel beam, the sensor has good sound field directivity, the influence of ultrasonic interference is reduced, and the weld defect detection capability of the steel column and the steel beam is improved.
The foregoing is merely illustrative of preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any changes or substitutions that would occur to those skilled in the art within the scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (7)
1.SH 0 The modal electromagnetic ultrasonic sensor is characterized in that: the sensor comprises a periodic permanent magnet array combination (1), a sensor exciting coil and a via hole (3),
the sensor excitation coil is designed by adopting a double-cluster reverse coil (2), the periodic permanent magnet array combination (1) is arranged at the position of a long straight wire of the double-cluster reverse coil (2), and each group of periodic permanent magnets corresponds to each cluster of reverse excitation coil.
2. SH as claimed in claim 1 0 The modal electromagnetic ultrasonic sensor is characterized in that the magnetizing direction of the periodic permanent magnet is the thickness direction of the magnet, and the magnetic pole directions of adjacent single permanent magnets are opposite when the periodic permanent magnet is placed.
3. SH as claimed in claim 1 0 A modal electromagnetic ultrasonic sensor is characterized in that the width of a single permanent magnet in a periodic permanent magnet array combination (1) is equal to the designed excitation SH 0 Half of the modal guided wave wavelength.
4. SH as claimed in claim 1 0 The modal electromagnetic ultrasonic sensor is characterized in that the height of a single permanent magnet is 5mm, the length is 18mm, and the width is 10mm.
5. SH as claimed in claim 1 0 The modal electromagnetic ultrasonic sensor is characterized in that a single cluster consists of 8 long straight wires, the wire spacing is 1mm, the length of each long straight wire is 32mm, and the effective working length is 30mm.
6. SH as claimed in claim 5 0 The modal electromagnetic ultrasonic sensor is characterized in that the effective working length of a single-cluster reverse-turn coil is 60mm.
7. SH as claimed in claim 1 0 The modal electromagnetic ultrasonic sensor is characterized in that the periodic permanent magnet array combination (1) is positioned right above the long straight wire part of the double-cluster inflection coil (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321097515.9U CN219842376U (en) | 2023-05-09 | 2023-05-09 | SH 0 Modal electromagnetic ultrasonic sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321097515.9U CN219842376U (en) | 2023-05-09 | 2023-05-09 | SH 0 Modal electromagnetic ultrasonic sensor |
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| Publication Number | Publication Date |
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| CN219842376U true CN219842376U (en) | 2023-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321097515.9U Active CN219842376U (en) | 2023-05-09 | 2023-05-09 | SH 0 Modal electromagnetic ultrasonic sensor |
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| CN (1) | CN219842376U (en) |
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- 2023-05-09 CN CN202321097515.9U patent/CN219842376U/en active Active
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