Electromagnetic ultrasonic detection device

Abstract

The utility model discloses an electromagnetic ultrasonic detection device, which comprises a data acquisition terminal and is characterized by further comprising a detection probe, the detection probe comprises a shell, a permanent magnet and an excitation coil, the permanent magnet and the excitation coil are arranged in the shell, and the excitation coil is arranged on a first insulating plate at the bottom of an inner cavity of the shell. A magnetostriction piece is arranged in the center of the bottom of the outer surface of the shell, extends into the shell and is in contact with the first insulating plate, an ultrasonic sensor is arranged at the contact position, the bottom of the permanent magnet is connected with the first insulating plate, a signal interface is formed in the shell, and the signal interface is connected with the magnetostriction piece. The signal interface is respectively connected with the ultrasonic sensor and the exciting coil, is used for acquiring ultrasonic signals and eddy current signals, and is connected with the data acquisition terminal through a data line.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic detection, in particular to an electromagnetic ultrasonic detection device. Background Art

[0002] Ultrasonic detection technology has been widely used in the field of industrial non-destructive testing. Especially in industries such as metal processing, aerospace, and petrochemical, it is used to detect defects such as the thickness, cracks, and pores of materials. Traditional ultrasonic detection devices usually rely on the pulse echo principle of ultrasonic waves, that is, by emitting ultrasonic waves to the material and then receiving the signals reflected from the back of the material to achieve detection. However, the existing ultrasonic thickness measurement technology has certain limitations.

[0003] As a new non-destructive testing technology, electromagnetic ultrasound has a series of advantages. Compared with traditional piezoelectric ultrasound, no couplant is required during the electromagnetic ultrasonic detection process, which is a non-contact measurement method. Therefore, the surface requirements of the test piece to be measured are not high during use, and it can also be used for non-destructive testing in some high-temperature environments. However, the current electromagnetic ultrasonic detection usually has only one detection method and cannot achieve simultaneous eddy current detection and ultrasonic detection. Summary of the Utility Model

[0004] In view of the above-mentioned prior art, the utility model aims to provide an electromagnetic ultrasonic detection device, mainly to solve the technical problems existing in the above background art.

[0005] To achieve the above object, the technical solution of the embodiment of the utility model is realized as follows:

[0006] An electromagnetic ultrasonic detection device includes a data acquisition terminal and a detection probe. The detection probe includes a housing, a permanent magnet disposed inside the housing, and an excitation coil. The excitation coil is disposed on a first insulating plate at the bottom of the inner cavity of the housing. A magnetostrictive sheet is provided at the center of the bottom of the outer surface of the housing, and the magnetostrictive sheet extends into the housing and contacts the first insulating plate, and a ultrasonic sensor is provided at the contact portion. The bottom of the permanent magnet is connected to the first insulating plate. A signal interface is provided on the housing, and the signal interface is respectively connected to the ultrasonic sensor and the excitation coil, which is used to collect ultrasonic signals and eddy current signals and is connected to the data acquisition terminal through a data line.

[0007] Optionally, the excitation coil includes a first coil and a second coil. The first coil and the second coil are arranged horizontally side by side and are not connected to each other. The second coil is connected to the signal interface.

[0008] Optionally, a second insulating plate is provided between the first coil and the second coil.

[0009] Optionally, the permanent magnet is U-shaped, the bottom of the U-shape is connected to the first insulating plate, the first coil and the second coil are arranged between the U-shape, and the second insulating plate is vertically abutted against the U-shaped permanent magnet.

[0010] Optionally, a power access port is provided on the housing, and the power access port is electrically connected to the first coil.

[0011] Optionally, a handle is provided on the housing.

[0012] The beneficial effects of the present utility model are as follows: The eddy current detection and ultrasonic detection can be simultaneously realized through the detection probe. When the excitation coil is powered on, an alternating magnetic field will be generated around it. When the metal specimen to be measured is placed in this magnetic field, eddy currents will be generated on the surface and near the surface of the material due to the electromagnetic induction effect. The eddy currents will generate their own magnetic field, which will interfere with the original magnetic field, and then cause the excitation coil to receive the eddy current signal. At the same time, the static magnetic field generated by the permanent magnet pre-magnetizes the magnetostrictive sheet to improve its magnetostrictive efficiency. The alternating magnetic field generated by the excitation coil will excite the vibration of the magnetostrictive sheet to generate the required ultrasonic waves. Through the ultrasonic waves and eddy currents, this solution can measure the thickness, and can also detect the uniformity and potential internal defects of the material, providing richer information for quality control. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the probe in the embodiment of the present application;

[0014] Figure 2 It is a schematic structural diagram of the electromagnetic ultrasonic detection device in the embodiment of the present application.

[0015] Explanation of the reference numerals in the drawings:

[0016] 1. Housing; 2. Permanent magnet; 3. First insulating plate; 4. Magnetostrictive sheet; 5. Ultrasonic sensor, 6. Signal interface; 7. First coil; 8. Second coil; 9. Second insulating plate; 10. Power access port; 11. Handle. Detailed Embodiments

[0017] The technical solution of the present utility model will be further described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. In the following description, the expression "some embodiments" is involved, which describes a subset of all possible embodiments. However, it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0018] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some well-known technical features in the art are not described.

[0019] It should be understood that the present utility model can be implemented in different forms and should not be construed as limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and will fully convey the scope of the present utility model to those skilled in the art. And the purpose of the terms used herein is only to describe specific embodiments and not to limit the present utility model. When used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, determine the presence of the stated features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups. When used herein, the term "and / or" includes any and all combinations of the related listed items.

[0020] It should be further noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "inner", "outer", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0021] To thoroughly understand the present utility model, detailed structures will be presented in the following description to illustrate the technical solutions proposed by the present utility model. The optional embodiments of the present utility model are described in detail as follows. However, in addition to these detailed descriptions, the present utility model may also have other implementation manners.

[0022] Please refer to the attached Figures 1 to 2 The present application provides an electromagnetic ultrasonic detection device, including a data acquisition terminal, and further including a detection probe. The detection probe includes a housing 1, a permanent magnet 2 disposed inside the housing 1, and an excitation coil. The excitation coil is disposed on a first insulating plate 3 at the bottom of the inner cavity of the housing 1. A magnetostrictive sheet 4 is provided at the center of the bottom of the outer surface of the housing 1, and the magnetostrictive sheet 4 extends into the housing 1 and is in contact with the first insulating plate 3. An ultrasonic sensor 5 is provided at the contact position. The bottom of the permanent magnet 2 is connected to the first insulating plate 3. A signal interface 6 is provided on the housing 1. The signal interface 6 is respectively connected to the ultrasonic sensor 5 and the excitation coil, and is used to collect ultrasonic signals and eddy current signals, and is connected to the data acquisition terminal through a data line.

[0023] The electromagnetic ultrasonic detection device provided by the present application can simultaneously implement two detection methods, namely eddy current detection and ultrasonic detection, through the detection probe, and obtain corresponding detection signals through the data acquisition terminal. When in use, first place the detection probe on the metal specimen to be measured. When the excitation coil is energized, an alternating magnetic field will be generated around it. When the metal specimen to be measured is placed in this magnetic field, due to the electromagnetic induction effect, eddy currents will be generated on the surface and near the surface of the material. The eddy currents will generate their own magnetic fields, which will interfere with the original magnetic field, and then cause the excitation coil to receive eddy current signals. At the same time, the static magnetic field generated by the permanent magnet 2 pre-magnetizes the magnetostrictive sheet 4 to improve its magnetostrictive efficiency. The alternating magnetic field generated by the excitation coil will excite the vibration of the magnetostrictive sheet 4 to generate the required ultrasonic waves. After the ultrasonic wave signal is transmitted to the metal specimen, the corresponding echo signal will cause the magnetostrictive sheet 4 to vibrate again. At this time, the ultrasonic sensor 5 can convert the vibration signal into an electrical signal. The electrical signal and the eddy current signal are both transmitted to the signal interface 6 and transmitted to the data acquisition terminal through the data line for analysis and processing.

[0024] Further, the magnetostrictive sheet 4 is made of a ferromagnetic material, such as iron or nickel alloy, and has a good magnetostrictive effect. Its thickness is about 0.5 mm.

[0025] In a possible implementation, the excitation coil includes a first coil 7 and a second coil 8. The first coil 7 and the second coil 8 are arranged horizontally side by side and are not connected to each other. The second coil 8 is connected to the signal interface 6. The first coil 7 is used to generate an alternating magnetic field when powered on, and the second coil 8 is used to receive the eddy current signal and transmit the eddy current signal to the signal interface 6.

[0026] Furthermore, a second insulating plate 9 is provided between the first coil 7 and the second coil 8. The use of the second insulating plate 9 avoids short circuits between the first coil 7 and the second coil 8 and ensures the safety of the circuit.

[0027] Furthermore, the permanent magnet 2 is a neodymium iron boron (NdFeB) magnet, which has a high magnetic energy product and good temperature stability. Its shape is U-shaped, and the specific dimensions are determined according to the required magnetic field strength and spatial layout. The bottom of its U-shape is connected to the first insulating plate 3. The first coil 7 and the second coil 8 are arranged between the U-shapes, and the second insulating plate 9 is vertically abutted against the U-shaped permanent magnet 2.

[0028] Furthermore, the housing 1 is made of a high-strength lightweight alloy, such as aluminum alloy, to ensure sufficient mechanical strength and good electromagnetic shielding performance while maintaining the portability of the device.

[0029] Furthermore, a power access port 10 is provided on the housing 1. The power access port 10 is electrically connected to the first coil 7. During use, it is connected to an AC power supply through a power cord, and the first coil 7 is powered by the AC power supply.

[0030] Furthermore, a handle 11 is provided on the housing 1 for easy gripping and moving.

[0031] The above are only the specific implementation manners of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. An electromagnetic ultrasonic detection device, comprising a data acquisition terminal, characterized in that: It also includes a detection probe, which includes a shell, a permanent magnet arranged inside the shell, and an excitation coil, the excitation coil is arranged on a first insulating plate at the bottom of the shell inner cavity, a magnetostrictive sheet is arranged at the center of the bottom of the outer surface of the shell, and the magnetostrictive sheet extends to the inside of the shell and contacts the first insulating plate, an ultrasonic sensor is arranged at the contact point, the bottom of the permanent magnet is connected to the first insulating plate, a signal interface is arranged on the shell, the signal interface is respectively connected to the ultrasonic sensor and the excitation coil, and is used to collect ultrasonic signals and eddy current signals, and is connected to the data acquisition terminal through a data line.

2. An electromagnetic ultrasonic detection device according to claim 1, characterized in that: The excitation coil includes a first coil and a second coil, the first coil and the second coil are arranged side by side horizontally and are not connected to each other, and the second coil is connected to the signal interface.

3. An electromagnetic ultrasonic detection device according to claim 2, characterized in that: A second insulating plate is provided between the first coil and the second coil.

4. The electromagnetic ultrasonic detection device according to claim 3, characterized in that: The permanent magnet is U-shaped, and the bottom of the U-shape is connected to the first insulating plate. The first coil and the second coil are arranged between the U-shapes, and the second insulating plate is vertically in contact with the U-shaped permanent magnet.

5. The electromagnetic ultrasonic detection device according to claim 4, characterized in that: The shell is provided with a power access port, and the power access port is electrically connected to the first coil.

6. The electromagnetic ultrasonic detection device according to claim 1, characterized in that: A handle is provided on the shell.

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