Magnetic domain distribution visual detection device for magnetic flux leakage signals

Abstract

The utility model provides a magnetic domain distribution visualization detection device of magnetic flux leakage signal, relates to the magnetic flux leakage detection field, including bottom plate and power supply, the upper surface of bottom plate is fixedly connected with four support pillar, the top end of every support pillar is fixedly connected with fixed frame, the inside of fixed frame is equipped with drive mechanism, and the drive mechanism is equipped with the power supply. A magnetizing mechanism is arranged below the driving mechanism, a positioning mechanism is installed on the upper surface of the bottom plate, a controller is installed on the front face of the fixing frame, a displayer is arranged on the front face of the controller, four supporting legs are fixedly connected to the bottom face of the bottom plate, and an anti-skid base is installed at the bottom end of each supporting leg. According to the utility model, through the cooperation of the annular electromagnet and the magnetic flux leakage signal acquisition module, a detected object can be subjected to saturation magnetization, a leakage magnetic field at a defect can be excited, the position of the annular electromagnet can be adjusted by using the hydraulic rod, objects with different shapes can be conveniently detected, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of magnetic flux leakage detection, specifically a device for visualizing the magnetic domain distribution of magnetic flux leakage signals. Background Technology

[0002] Magnetic flux leakage detection refers to the phenomenon where, after a ferromagnetic material is magnetized, a magnetic field is formed on its surface or near the surface due to defects. By detecting changes in the magnetic flux leakage field, defects can be discovered. The magnetic flux leakage field occurs when a material has defects that cut magnetic field lines. The defects on the material surface or changes in the material's microstructure cause changes in the permeability. Because the permeability of the defects is very small and the magnetic resistance is very large, the magnetic flux in the magnetic circuit is distorted, and the direction of the magnetic field lines changes. In addition to some magnetic flux passing directly through the defects or the interior of the material to bypass them, some magnetic flux leaks to the air above the material surface, bypasses the defects through the air, and then re-enters the material, thus forming a magnetic flux leakage field on the material surface.

[0003] Magnetic flux leakage (MF) detection technology is widely used for detecting surface and near-surface defects in ferromagnetic materials. Its principle involves magnetizing the object under test to generate a magnetic flux leakage field at the defect location. A sensor then captures the MF leakage signal and analyzes the defect characteristics. Current MF leakage signal detection devices only determine defects based on the amplitude of the MF leakage signal, failing to intuitively reflect the dynamic distribution of magnetic domains within the object. This limits the inference of defect type, shape, and depth, and also makes it inconvenient to locate the object under test, reducing detection efficiency. Therefore, we propose a visualization detection device for the magnetic domain distribution of MF leakage signals to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a visualization detection device for the magnetic domain distribution of leakage magnetic signals, so as to solve the problems mentioned in the background art and overcome its technical defects.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a magnetic domain distribution visualization detection device for leakage magnetic signals, including a base plate and a power supply. Four support columns are fixedly connected to the upper surface of the base plate, and a fixed frame is fixedly connected to the top of each support column. A driving mechanism is installed inside the fixed frame, and a magnetizing mechanism is provided below the driving mechanism. A positioning mechanism is installed on the upper surface of the base plate. A controller is installed on the front of the fixed frame, and a display is provided on the front of the controller. Four support legs are fixedly connected to the bottom surface of the base plate, and an anti-slip seat is installed at the bottom end of each support leg.

[0006] As a further improvement of this utility model: the positioning mechanism includes two support seats, each of which has a cylinder mounted on its upper surface, and each of the cylinders has a rubber clamp mounted on its output end.

[0007] As a further embodiment of this utility model: the driving mechanism includes a through hole, a bearing is fixedly embedded in the inner side wall of the fixed frame, a forward and reverse motor is installed on the right side of the fixed frame, a threaded rod is fixedly connected to the output end of the forward and reverse motor, and the left end of the threaded rod is connected to the inner ring of the bearing.

[0008] As a further embodiment of this utility model: the outer surface of the threaded rod is threaded with a positioning screw ring, and the inner sidewall of the fixed frame is provided with symmetrical sliding grooves. The interior of each of the two sliding grooves is slidably connected with a slider, and the side of each slider that is close to the other is connected to the outer surface of the positioning screw ring.

[0009] As a further embodiment of this utility model: the magnetization mechanism includes a fixing block, the upper surface of which is connected to the bottom surface of the positioning screw ring, and a positioning frame is fixedly connected to the bottom end of the fixing block. The outer surface of the positioning frame is provided with symmetrical limiting holes.

[0010] As a further improvement of this utility model: symmetrical hydraulic rods are installed on the outer surfaces of the two positioning frames, and positioning blocks are installed at the output ends of the two hydraulic rods. Annular electromagnets are installed on the side of the two positioning blocks that are close to each other, and two sets of leakage magnetic signal acquisition modules are installed on the side of the two positioning blocks that are close to each other.

[0011] As a further embodiment of this utility model: the power supply is connected to the controller via a wire, the controller is connected to the leakage magnetic signal acquisition module via a wire, and the controller is connected to the ring electromagnet via a wire.

[0012] As a further embodiment of this utility model: the power supply is connected to a protection line via a wire, the controller is connected to a data storage device via a wire, and the power supply is connected to a display via a wire.

[0013] Compared with the prior art, the beneficial effects of this utility model include:

[0014] The combination of a cylinder and rubber clamps allows for clamping and positioning of the material to be inspected. The combination of a forward and reverse motor and a threaded rod drives the positioning screw ring to move left and right, facilitating magnetization of the object. The use of a sliding groove and a slider ensures more stable movement of the positioning screw ring. The combination of a ring electromagnet and a leakage magnetic field acquisition module allows for saturation magnetization of the object under test, exciting the leakage magnetic field at the defect site. The position of the ring electromagnet can be adjusted using a hydraulic rod, facilitating the inspection of objects of different shapes. Furthermore, it provides a direct visual representation of the dynamic distribution of magnetic domains within the object, improving inspection efficiency. Attached Figure Description

[0015] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0016] Figure 1 The schematic diagram shows a three-dimensional structural schematic of a magnetic domain distribution visualization detection device for leakage magnetic signals according to one embodiment of the present invention;

[0017] Figure 2 The diagram schematically shows a cross-sectional view of the fixed frame in a magnetic domain distribution visualization detection device for leakage magnetic signals according to one embodiment of the present invention.

[0018] Figure 3 The schematic diagram shows a side sectional view of the fixed frame in a magnetic domain distribution visualization detection device for leakage magnetic signals according to one embodiment of the present invention.

[0019] Figure 4 The schematic diagram shows a system diagram of a magnetic domain distribution visualization detection device for leakage magnetic signals according to one embodiment of the present invention;

[0020] The diagram is labeled as follows: 1. Base plate; 2. Drive mechanism; 201. Through hole; 202. Bearing; 203. Forward and reverse motor; 204. Threaded rod; 205. Positioning screw ring; 206. Slide groove; 207. Slider; 3. Magnetization mechanism; 301. Fixing block; 302. Positioning frame; 303. Limiting hole; 304. Hydraulic rod; 305. Positioning block; 306. Ring electromagnet; 307. Leakage magnetic signal acquisition module; 4. Support column; 5. Positioning mechanism; 501. Support base; 502. Cylinder; 503. Rubber clamp; 6. Fixing frame; 7. Controller; 8. Display; 9. Support leg; 10. Anti-slip seat; 11. Power supply; 12. Data storage device; 13. Protective wire. Detailed Implementation

[0021] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0022] According to one embodiment of the present invention, in conjunction with the appended drawings Figure 1-4 As shown.

[0023] A magnetic domain distribution visualization detection device for leakage magnetic signals includes a base plate 1 and a power supply 11. Four support columns 4 are fixedly connected to the upper surface of the base plate 1. A fixing frame 6 is fixedly connected to the top of each support column 4. A drive mechanism 2 is installed inside the fixing frame 6, and a magnetization mechanism 3 is located below the drive mechanism 2. A positioning mechanism 5 is installed on the upper surface of the base plate 1. A controller 7 is installed on the front of the fixing frame 6, and a display 8 is located on the front of the controller 7. Four support legs 9 are fixedly connected to the bottom surface of the base plate 1, and an anti-slip seat 10 is installed at the bottom of each support leg 9. The power supply 11... The device is connected to the controller 7 via wires, and the controller 7 is connected to the leakage magnetic signal acquisition module 307 via wires. The controller 7 is also connected to the ring electromagnet 306 via wires. The power supply 11 is connected to the protection line 13 via wires. The controller 7 is connected to the data storage device 12 via wires. The power supply 11 is also connected to the display 8 via wires. The controller 7 allows for convenient control of the device, and the display 8 allows for easy viewing of the test data by the staff. The device can be stably placed by the cooperation of the support leg 9 and the anti-slip seat 10, preventing the device from sliding.

[0024] In this embodiment, the positioning mechanism 5 includes two support seats 501, each with a cylinder 502 mounted on its upper surface. A rubber clamp 503 is mounted on the output end of each cylinder 502. The driving mechanism 2 includes a through hole 201. A bearing 202 is fixedly embedded in the inner wall of the fixing frame 6. A forward / reverse motor 203 is mounted on the right side of the fixing frame 6. A threaded rod 204 is fixedly connected to the output end of the forward / reverse motor 203. The left end of the threaded rod 204 is connected to the inner ring of the bearing 202. A positioning ring 205 is threaded onto the outer surface of the threaded rod 204. The inner sidewall of frame 6 is provided with symmetrical sliding grooves 206. Sliding sliders 207 are slidably connected inside the two sliding grooves 206. The sides of the two sliders 207 that are close to each other are connected to the outer surface of the positioning screw ring 205. Through the cooperation of the forward and reverse motors 203 and the threaded rod 204, the positioning screw ring 205 can be driven to move left and right, which facilitates the magnetization of the detected object. The cooperation of the sliding grooves 206 and the sliders 207 can make the movement of the positioning screw ring 205 more stable. Through the cooperation of the cylinder 502 and the rubber clamp 503, the detected material can be clamped and positioned.

[0025] In this embodiment, the magnetization mechanism 3 includes a fixing block 301. The upper surface of the fixing block 301 is connected to the bottom surface of the positioning screw ring 205. A positioning frame 302 is fixedly connected to the bottom end of the fixing block 301. The outer surface of the positioning frame 302 is provided with symmetrical limiting holes 303. Symmetrical hydraulic rods 304 are installed on the outer surfaces of the two positioning frames 302. A positioning block 305 is installed at the output end of each of the two hydraulic rods 304. A ring electromagnet 306 is installed on the side of the two positioning blocks 305 that is close to each other. Two sets of leakage magnetic signal acquisition modules 307 are installed on the side of the two positioning blocks 305 that is close to each other. The leakage magnetic signal acquisition module 307 is composed of a high-density Hall sensor array. Through the cooperation of the ring electromagnet 306 and the leakage magnetic signal acquisition module 307, the object under test can be saturated magnetized to excite the leakage magnetic field of the defect. The position of the ring electromagnet 306 can be adjusted by the hydraulic rod 304, which is convenient for detecting objects of different shapes. Furthermore, it can intuitively reflect the dynamic distribution of magnetic domains inside the object and improve the detection efficiency.

[0026] The working principle of this utility model is as follows:

[0027] In use, first connect the device to the corresponding power supply 11. Then, with the cooperation of the support leg 9 and the anti-slip seat 10, the device is stably placed in a suitable position. Then, with the cooperation of the cylinder 502 and the rubber clamp 503, the material to be tested can be clamped and positioned. With the cooperation of the forward and reverse motor 203 and the threaded rod 204, the positioning screw ring 205 can be moved left and right to facilitate magnetization of the object to be tested. With the cooperation of the slide groove 206 and the slider 207, the movement of the positioning screw ring 205 can be made more stable. Then, with the cooperation of the annular electromagnet 306 and the leakage magnetic field acquisition module 307, the object under test can be saturated magnetized to excite the leakage magnetic field of the defect. The position of the annular electromagnet 306 can be adjusted by the hydraulic rod 304 to facilitate the detection of objects of different shapes and improve the detection efficiency.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for visualizing and detecting the domain distribution of leakage magnetic signals, characterized in that, Includes a base plate (1) and a power supply (11). The upper surface of the base plate (1) is fixedly connected to four support columns (4). The top of each support column (4) is fixedly connected to a fixed frame (6). The fixed frame (6) is equipped with a drive mechanism (2). A magnetization mechanism (3) is provided below the drive mechanism (2). The upper surface of the base plate (1) is equipped with a positioning mechanism (5). The front of the fixed frame (6) is equipped with a controller (7). The front of the controller (7) is equipped with a display (8). The bottom surface of the base plate (1) is fixedly connected to four support legs (9). The bottom end of each support leg (9) is equipped with an anti-slip seat (10).

2. The magnetic domain distribution visualization detection device for leakage magnetic signals according to claim 1, characterized in that, The positioning mechanism (5) includes two support seats (501), and a cylinder (502) is installed on the upper surface of each of the two support seats (501). A rubber clamp (503) is installed at the output end of each of the two cylinders (502).

3. The magnetic domain distribution visualization detection device for leakage magnetic signals according to claim 1, characterized in that, The drive mechanism (2) includes a through hole (201), a bearing (202) is fixedly embedded in the inner side wall of the fixed frame (6), a forward and reverse motor (203) is installed on the right side of the fixed frame (6), a threaded rod (204) is fixedly connected to the output end of the forward and reverse motor (203), and the left end of the threaded rod (204) is connected to the inner ring of the bearing (202).

4. The magnetic domain distribution visualization detection device for leakage magnetic signals according to claim 3, characterized in that, The outer surface of the threaded rod (204) is threaded with a positioning ring (205). The inner sidewall of the fixed frame (6) is provided with symmetrical sliding grooves (206). The two sliding grooves (206) are slidably connected with sliders (207). The sides of the two sliders (207) that are close to each other are connected to the outer surface of the positioning ring (205).

5. The domain distribution visualization detection device for leakage magnetic signals according to claim 4, characterized in that, The magnetization mechanism (3) includes a fixing block (301), the upper surface of which is connected to the bottom surface of the positioning screw ring (205), and a positioning frame (302) is fixedly connected to the bottom end of the fixing block (301). The outer surface of the positioning frame (302) is provided with symmetrical limiting holes (303).

6. The magnetic domain distribution visualization detection device for leakage magnetic signals according to claim 5, characterized in that, The outer surfaces of the two positioning frames (302) are equipped with symmetrical hydraulic rods (304), and the output ends of the two hydraulic rods (304) are equipped with positioning blocks (305). The two positioning blocks (305) are equipped with ring electromagnets (306) on their adjacent sides, and the two positioning blocks (305) are equipped with two sets of leakage magnetic signal acquisition modules (307) on their adjacent sides.

7. The magnetic domain distribution visualization detection device for leakage magnetic signals according to claim 6, characterized in that, The power supply (11) is connected to the controller (7) via a wire, the controller (7) is connected to the leakage magnetic signal acquisition module (307) via a wire, and the controller (7) is connected to the ring electromagnet (306) via a wire.

8. The domain distribution visualization detection device for leakage magnetic signals according to claim 7, characterized in that, The power supply (11) is connected to a protection line (13) via a wire, the controller (7) is connected to a data storage device (12) via a wire, and the power supply (11) is connected to a display (8) via a wire.

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