CN218382534U - Composite defect detection probe based on electromagnetic ultrasonic and alternating-current electromagnetic field - Google Patents
Composite defect detection probe based on electromagnetic ultrasonic and alternating-current electromagnetic field Download PDFInfo
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- CN218382534U CN218382534U CN202222804004.8U CN202222804004U CN218382534U CN 218382534 U CN218382534 U CN 218382534U CN 202222804004 U CN202222804004 U CN 202222804004U CN 218382534 U CN218382534 U CN 218382534U
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Abstract
A composite defect detection probe based on electromagnetic ultrasound and alternating-current electromagnetic fields comprises a probe shell, a shell cover, a rectangular magnetic core, a magnetic sensor, a signal amplification circuit, a bnc connector, a Ramat connector, a permanent magnet, a detection coil and a screw. There are bnc joint mounting hole, detection coil mounting groove, magnetic sensor mounting groove, permanent magnet mounting groove, ramol joint mounting hole in the probe shell design, bnc connect by bnc connects the mounting hole to be in on the probe shell, detection coil by detection coil mounting groove is in the probe shell, magnetic sensor by the magnetic sensor mounting groove is in the probe shell, the permanent magnet is installed in the permanent magnet mounting groove, ramol connects by ramol joint mounting hole is in on the probe shell, the rectangle magnetic core is put on the permanent magnet, signal amplification circuit is put in the probe shell, the shell lid by the screw is in on the probe shell.
Description
Technical Field
The invention relates to the field of nondestructive defect detection, in particular to a composite defect detection probe design based on electromagnetic ultrasound and an alternating current electromagnetic field.
Background
The Alternating current magnetic field detection (ACFM) technology is characterized in that an exciting coil induces uniform Alternating current in a workpiece, the induced current generates disturbance at defect positions such as cracks and corrosion, and a detection sensor is used for measuring a space magnetic field distortion signal based on the principle that the electric field disturbance causes space magnetic field distortion, so that the defect detection and evaluation are realized. Electromagnetic Acoustic Transducer (EMAT) is a novel nondestructive testing technique. The detection principle is that high-frequency alternating current is introduced into a coil, and the coil is close to a piece to be detected to generate high-frequency induced eddy current on the surface of the piece to be detected. Under the action of an external magnetic field, the to-be-detected piece is subjected to Lorentz force, so that ultrasonic waves are generated inside the to-be-detected piece. If the interior of the piece to be detected has defects, the ultrasonic waves are reflected to the surface and are received and amplified by the electromagnetic ultrasonic transducer, and information such as the positions, sizes and the like of the defects can be obtained through comparison. The alternating current electromagnetic field detection has two advantages of non-contact and calibration-free measurement, and can accurately measure the surface crack defects of the aluminum plate. But only surface and subsurface defects, and not internal defects. The electromagnetic ultrasonic detection has the advantages of no need of a coupling agent, no contact and the like. The internal defects of the aluminum plate can be detected by using the body waves generated by the transducer. Since the transduction process is mainly performed on the surface of the aluminum plate, surface or subsurface defects cannot be detected. With the continuous development of the times, the use scenes and the use conditions of workpieces are more and more complex, the defect types tend to be compounded, and the single nondestructive detection cannot meet the detection requirements of the current times. The composite nondestructive testing method integrated by various nondestructive testing methods is beginning to be valued by researchers at home and abroad. Therefore, the detection method for various defects of the aluminum plate obviously needs a plurality of nondestructive detection methods to be combined so as to meet the requirements of comprehensive detection, quantitative detection and the like of the defects of the aluminum plate. The invention designs a composite defect detection probe based on electromagnetic ultrasound and an alternating current electromagnetic field based on the composite detection technology of electromagnetic ultrasound and the alternating current electromagnetic field, and can realize comprehensive and qualitative detection of surface defects and internal defects of an aluminum plate by combining the advantages of ACFM surface and subsurface defect detection, EMAT internal defect detection and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses mainly be not enough to current electromagnetic ultrasound and alternating current electromagnetic field's compound defect detecting probe field, research and development one kind realizes electromagnetic ultrasound and alternating current electromagnetic field's compound defect detecting probe simultaneously in the testing process. The probe is simultaneously provided with an alternating current electromagnetic field detection module and an electromagnetic ultrasonic detection module, can simultaneously receive alternating current and transmission flow electromagnetic field detection defect information and electromagnetic ultrasonic detection defect information, and combines the advantages of ACFM surface and sub-surface defect detection and EMAT internal defect detection to realize comprehensive and qualitative detection of aluminum plate surface defects and internal defects. In order to realize the detection effect, the experiment provides the following technical scheme: a composite defect detection probe based on electromagnetic ultrasound and alternating-current electromagnetic fields comprises a probe shell, a shell cover, a rectangular magnetic core, a magnetic sensor, a signal amplification circuit, a bnc connector, a Ramat connector, a permanent magnet, a detection coil and a screw. There are bnc joint mounting hole, detection coil mounting groove, magnetic sensor mounting groove, permanent magnet mounting groove, ramol joint mounting hole in the probe shell design, the bnc connects through inserting bnc connects the mounting hole to be installed on the probe shell, the detection coil passes through the detection coil mounting groove is installed inside the probe shell, the magnetic sensor passes through the magnetic sensor mounting groove is installed inside the probe shell, the permanent magnet passes through the permanent magnet mounting groove is fixed inside the probe shell, the ramol joint passes through the ramol joint mounting hole is fixed on the probe shell, the rectangle magnetic core is placed the permanent magnet top, signal amplification circuit can the inside residual space of probe shell freely arranges, including establishing the back of finishing the installation, can with the shell lid passes through screw installation and fixing on the probe shell.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the beneficial technical effects that:
(1) And the composite detection of the ACFM and EMAT double technologies is realized, and the defects are detected by using two detection methods, so that the defect of a single detection technology is overcome.
(2) The detection probes of two detection types are integrated in one probe shell, so that the occupied space is smaller, the cost is reduced, the probes of different detection types are prevented from being replaced in the detection process, and the efficiency is improved.
(3) The detection of surface, subsurface and internal defects can be realized, and the detection precision and the detection range can be effectively improved.
Description of the drawings:
FIG. 1 is an overall exploded view of the present invention;
FIG. 2 is a view showing the internal structure of the probe case according to the present invention;
FIG. 3 is a schematic view of the installation of the internal structure of the present invention;
FIG. 4 is a schematic view of the overall assembly of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the application provides a composite defect detection probe based on electromagnetic ultrasound and an alternating-current electromagnetic field. As shown in fig. 1, 2 and 4, the composite defect detecting probe based on electromagnetic ultrasound and alternating electromagnetic fields comprises a probe shell (1), a shell cover (2), a rectangular magnetic core (3), a magnetic sensor (4), a signal amplifying circuit (5), a bnc connector (6), a rema connector (7), a permanent magnet (8), a detecting coil (9) and a screw (10). Probe shell (1) includes bnc joint mounting hole (1.1), detection coil mounting groove (1.2), magnetic sensor mounting groove (1.3), permanent magnet mounting groove (1.4), ramol joint mounting hole (1.5). Install bnc connects (6) in bnc connects mounting hole (1.1), install detection coil (9) in detection coil mounting groove (1.2), install magnetic sensor (4) in magnetic sensor mounting groove (1.3), install permanent magnet (8) in permanent magnet mounting groove (1.4), install ramol connects (7) in ramol connects mounting hole (1.5). The signal amplification circuit (5) can be freely arranged in the remaining space inside the probe shell (1). After the probe is installed inside, the shell cover (2) can be installed and fixed on the probe shell (1) through the screws (10).
The working principle is as follows: when the defect detection of the aluminum plate is carried out, one surface of the detection probe, which is provided with the detection coil (9), is placed on the surface of the aluminum plate, and the defect scanning is carried out on the surface of the aluminum plate. In the detection process, the bnc connector (6) and the Remo connector (7) are connected with a signal acquisition device and a signal excitation device, an excitation electric signal is led into the rectangular magnetic core (3) and then induces a uniform magnetic field signal on the surface of an object to be detected, when a detection probe passes through a defect area, the uniform magnetic field distorts at the defect, the generated magnetic field distortion signal is picked up by the magnetic sensor (4) and is transmitted to the signal amplification circuit (5), and further, the amplified distorted magnetic field signal is transmitted to the signal acquisition device through the Remo connector (7). Let in high frequency excitation signal simultaneously rectangle magnetic core (3) and produce the high frequency induction vortex on aluminum plate surface, the external magnetic field effect that permanent magnet (8) produced produces the lorentz force on the induction vortex, and aluminum plate receives the ultrasonic wave that the lorentz force produced and propagate along the thickness direction, and the ultrasonic wave can produce the echo in inside defect position, and further, defect echo signal directly by bnc connects (6) and transmits to signal acquisition equipment, and last host computer will handle two kinds of defect signals that the analysis was passed through and show on human-computer interface, realize aluminum plate surface, sub-surface and internal defect's detection.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The composite defect detection probe based on the electromagnetic ultrasonic and alternating-current electromagnetic fields is characterized by comprising a probe shell (1), a shell cover (2), a rectangular magnetic core (3), a magnetic sensor (4), a signal amplification circuit (5), a bnc connector (6), a rema connector (7), a permanent magnet (8), a detection coil (9) and a screw (10).
2. A composite type defect detecting probe based on electromagnetic ultrasonic and alternating electromagnetic fields as claimed in claim 1, characterized in that said probe housing (1) further comprises a bnc joint mounting hole (1.1), a detection coil mounting groove (1.2), a magnetic sensor mounting groove (1.3), a permanent magnet mounting groove (1.4), a remo joint mounting hole (1.5);
the bnc connector (6) is installed in the bnc connector installation hole (1.1);
the detection coil (9) is arranged in the detection coil mounting groove (1.2);
the magnetic sensor (4) is mounted in the magnetic sensor mounting groove (1.3);
the permanent magnet (8) is arranged in the permanent magnet mounting groove (1.4);
the Ramo joint (7) is mounted in the Ramo joint mounting hole (1.5);
the signal amplification circuit (5) can be freely arranged in the remaining space inside the probe shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222804004.8U CN218382534U (en) | 2022-10-25 | 2022-10-25 | Composite defect detection probe based on electromagnetic ultrasonic and alternating-current electromagnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222804004.8U CN218382534U (en) | 2022-10-25 | 2022-10-25 | Composite defect detection probe based on electromagnetic ultrasonic and alternating-current electromagnetic field |
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| CN218382534U true CN218382534U (en) | 2023-01-24 |
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| CN202222804004.8U Active CN218382534U (en) | 2022-10-25 | 2022-10-25 | Composite defect detection probe based on electromagnetic ultrasonic and alternating-current electromagnetic field |
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| CN (1) | CN218382534U (en) |
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- 2022-10-25 CN CN202222804004.8U patent/CN218382534U/en active Active
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