A magnetic testing device for nanocrystalline strips

Abstract

The present invention relates to the field of magnetic detection technology, and discloses a nanocrystalline strip magnetic testing device, including a nanocrystalline strip detection box, wherein both sides of the inner wall of the nanocrystalline strip detection box are fixedly connected with brackets, the outer walls of the two brackets are rotatably connected with rotating bodies through a second rotating shaft, and the outer walls of the two rotating bodies are rotatably installed with limit members, wherein the limit members are composed of two clamping rollers that can be adjusted to be close or far away, and further include a bending assembly, wherein the bending assembly can bend the nanocrystalline strip located between the two groups of rotating bodies, and the bending has two states, one of which is static bending and the other is dynamic bending. The present invention cooperates with the friction wheel, the friction plate and the clamping roller, so that the clamping roller actively rotates to send the nanocrystalline strip to the middle, thereby reducing the pulling force on the nanocrystalline strip as much as possible, thereby reducing the influence of the pulling force on the magnetic performance result, and making the final test result more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic detection devices, in particular to a nanocrystalline strip magnetic testing device. Background Art

[0002] Nowadays, nanocrystalline ribbons are widely used. The magnetic testing device for nanocrystalline ribbons is a device specially used to measure and analyze the magnetic properties of nanocrystalline ribbons. This device can help us understand the magnetic properties of nanocrystalline ribbons, such as magnetic permeability, coercive force, magnetostriction, Curie temperature and saturation flux density. The magnetic testing device for nanocrystalline ribbons is an important scientific research tool.

[0003] For example, Chinese patent publication No. CN219162348U discloses a nanocrystalline magnetic core magnetic detection device, which relates to the technical field of magnetic detection devices, including a mounting plate, an anti-interference protective shell is fixedly provided at the bottom end of the mounting plate, a magnetic detector body is fixedly provided in the middle of one side of the inner wall of the anti-interference protective shell, an outer fixed sleeve of the anti-interference protective shell is provided with an insulating protective layer, and an outer fixed sleeve of the insulating protective layer is provided with an anti-radiation protective layer. The beneficial effects of the utility model are: controlling the telescopic adjustment of the output end of the first electric hydraulic cylinder to drive the probe of the magnetic detector body to perform lateral displacement through the slider, the second electric hydraulic cylinder, the connecting block and the connecting ring to perform magnetic detection on different positions of the nanocrystalline magnetic core; the anti-interference protective shell, the insulating protective layer, the anti-radiation protective layer and the anti-interference box door arranged during the detection process cooperate to provide a closed detection environment for the nanocrystalline magnetic core to be detected, so as to provide a better closed anti-interference function during the detection process.

[0004] However, the detection device mentioned above detects the magnetic properties of the nanocrystalline magnetic core, and when the nanocrystalline ribbon is used directly in the form of a ribbon, for example, for manufacturing a magnetic shielding layer, then the magnetic stability of the nanocrystalline ribbon needs to have certain requirements. However, when the nanocrystalline ribbon is bent during use, mechanical stress will be introduced into the material, which may cause changes in the magnetic domain structure and further affect the stability of the magnetic properties. Therefore, under the premise that the nanocrystalline ribbon can maintain magnetic stability, it is necessary to detect the maximum bending angle that the nanocrystalline ribbon can withstand. Summary of the invention

[0005] The object of the present invention is to provide a nanocrystalline strip magnetic testing device to solve at least one technical problem existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a nanocrystalline strip magnetic testing device, comprising a nanocrystalline strip detection box, wherein both sides of the inner wall of the nanocrystalline strip detection box are fixedly connected with brackets, the outer walls of the two brackets are rotatably connected with a rotating body through a second rotating shaft, and the outer walls of the two rotating bodies are rotatably installed with a limit member, and the limit member is composed of two clamping rollers that can be adjusted to be close or far away;

[0007] It also includes a bending assembly, which can bend the nanocrystalline ribbon between the two sets of rotating bodies, and the bending has two states, one is static bending and the other is dynamic bending;

[0008] It also includes a detection component, which contains a magnetic detection probe, and the magnetic detection probe can detect the magnetic properties of the nanocrystalline strips in two bending states.

[0009] Preferably, the bending assembly comprises a cylinder installed on the top of the nanocrystalline strip detection box, the telescopic rod of the cylinder passes through the nanocrystalline strip detection box and is fixedly connected to an adjusting body, a lifting portion is installed on the outer wall of the adjusting body, and the lifting portion can contact the nanocrystalline strip.

[0010] Preferably, the lifting portion is an adjusting wheel, the adjusting wheel is fixedly connected to the outer wall of the adjusting body, and the adjusting wheel is located on one side of the nanocrystalline strip to be detected;

[0011] The magnetic detection probe is connected to an external moving device, and the moving device can move the magnetic detection probe along the surface of the bent nanocrystalline strip.

[0012] Preferably, the adjusting body is provided with a slide groove on both the upper and lower sides, and a first slider is slidably installed in the two slide grooves, a first screw is rotatably installed inside the adjusting body, and the two first sliders are provided with a through hole, and the through hole is provided with an internal thread, and the first screw passes through the through hole and meshes with the internal thread of the through hole;

[0013] The lifting part is two adjusting wheels, and the two adjusting wheels are respectively installed on the outer walls of the two first sliding blocks, one of the adjusting wheels is provided with a through hole, and the magnetic detection probe is installed in the through hole and always corresponds to the bent part of the nanocrystalline strip.

[0014] Preferably, the outer wall of the regulating body is rotatably connected to two connecting rods via a first rotating shaft, the outer walls of the two connecting rods are provided with long grooves, and the outer walls of the two second rotating shafts are fixed with third sliders slidably installed in the long grooves.

[0015] Preferably, each of the clamping rollers is coaxially fixedly connected to a friction wheel via a third rotating shaft, a friction plate is fixedly connected to the connecting rod, and the friction plate passes between two friction wheels on the same side and is in friction contact with both of them.

[0016] Preferably, the rotating body is provided with slide grooves on both the upper and lower sides, and second sliders are slidably installed in the two slide grooves. A second screw is rotatably installed inside the rotating body, and the second screw passes through the two second sliders and is threadedly connected to the penetration points of the two second sliders.

[0017] Preferably, the outer wall of each clamping roller is wrapped with an elastic friction layer.

[0018] Preferably, the contact surfaces of the friction wheel and the friction plate are both rough surfaces.

[0019] Preferably, the nanocrystalline strip inspection box is provided with a door that can be opened or closed, and the nanocrystalline strip inspection box can form an isolated space.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention drives the connecting rod to rotate through the cooperation between the long groove on the connecting rod and the third slider, and drives the limiter to rotate through the connecting rod, so that each connecting rod is always kept parallel to the corresponding nanocrystalline strip, so that the line connecting the centers of the two clamping rollers in each limiter is always perpendicular to the nanocrystalline strip, avoiding the bending of the nanocrystalline strip due to the clamping roller, and thus achieving only one bending place for the entire nanocrystalline strip, making the detection result more accurate and increasing the accuracy of the test.

[0022] 2. The present invention cooperates with the friction wheel, the friction plate and the clamping roller to make the clamping roller actively rotate to send the nanocrystalline ribbon to the middle, thereby reducing the pulling force on the nanocrystalline ribbon as much as possible, thereby reducing the influence of the pulling force on the magnetic performance results, making the final test results more accurate, so as to achieve the purpose of detecting the magnetic properties of the nanocrystalline ribbon at different bending degrees. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view of the present invention;

[0024] Figure 2 A perspective view of the present invention;

[0025] Figure 3 This is a rear view of the present invention after removing the housing and the cylinder;

[0026] Figure 4 It is a rear cross-sectional view of the present invention after removing the housing and the cylinder;

[0027] Figure 5This is a three-dimensional diagram of the present invention after removing the housing and the cylinder;

[0028] Figure 6 This is a right side view of the present invention after removing the housing and the cylinder;

[0029] Figure 7 A schematic diagram of the state of the static bending test of the present invention;

[0030] Figure 8 It is a schematic diagram of the state of the dynamic bending test of the present invention.

[0031] In the figure: 1. Nanocrystalline strip detection box; 2. Bracket; 3. Clamping roller; 4. Rotating body; 5. Second slider; 6. First screw; 7. First rotating axis; 8. Adjusting wheel; 9. Long groove; 10. Third slider; 11. Second rotating axis; 12. Third rotating axis; 13. Friction wheel; 14. Friction plate; 15. Elastic friction layer; 16. Adjusting body; 17. Magnetic detection probe; 18. Connecting rod; 19. First slider. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 8 The present invention provides a technical solution: a nanocrystalline strip magnetic testing device, comprising a nanocrystalline strip testing box 1, brackets 2 are fixedly connected to both sides of the inner wall of the nanocrystalline strip testing box 1, the outer walls of the two brackets 2 are rotatably connected to a rotating body 4 through a second rotating shaft 11, and the outer walls of the two rotating bodies 4 are rotatably installed with limit members, and the limit members are composed of two clamping rollers 3 that can be adjusted to be close or far away;

[0034] It also includes a bending assembly, which can bend the nanocrystalline strip between the two sets of rotating bodies 4, and the bending has two states, one is static bending, and the other is dynamic bending;

[0035] It also includes a detection component, which includes a magnetic detection probe 17, and the magnetic detection probe 17 can detect the magnetic properties of the nanocrystalline strip in two bending states.

[0036] When nanocrystalline ribbons are used directly in the form of ribbons, such as for manufacturing magnetic shielding layers, the magnetic stability of the nanocrystalline ribbons needs to meet certain requirements. However, when the nanocrystalline ribbons are bent during use, mechanical stress will be introduced into the material, which may cause changes in the magnetic domain structure and thus affect the stability of the magnetic properties. Therefore, under the premise that the nanocrystalline ribbons can maintain magnetic stability, it is necessary to detect the maximum bending angle that the nanocrystalline ribbons can withstand. Therefore, in this case, the main problem to be solved is how to detect the magnetic properties of nanocrystalline ribbons at different bending degrees. The specific methods are as follows:

[0037] When the test device is used, the nanocrystalline strip to be tested is first placed on the limiter, and the nanocrystalline strip to be tested is clamped by adjusting the two clamping rollers 3 in each limiter. The magnetic property of the nanocrystalline strip before bending can be tested by the magnetic detection probe 17 in the detection assembly, and then the nanocrystalline strip is driven to be bent by the bending assembly, and the magnetic property of the nanocrystalline strip after bending can be tested again by the magnetic detection probe 17 in the detection assembly.

[0038] First, when the bending assembly causes the nanocrystalline ribbon to bend statically, that is, the nanocrystalline ribbon stops bending after bending to a specified angle and maintains the bent state, the magnetic detection probe 17 detects the magnetic properties of the nanocrystalline ribbon bent at this angle. Similarly, by detecting the magnetic properties of the nanocrystalline ribbon at different bending angles, it can be determined that the maximum bending angle that the nanocrystalline ribbon can withstand while maintaining magnetic stability can be obtained, and then its limit value during use can be obtained to facilitate subsequent other forms of use. When the nanocrystalline ribbon is used in a scenario where static bending may occur, the test result can be used as a reference.

[0039] Second, when the bending assembly dynamically bends the nanocrystalline ribbon, see Figure 8 , the nanocrystalline ribbon continuously swings back and forth and bends within the range indicated by a in the figure. At this time, the magnetic detection probe 17 detects the magnetic properties of the nanocrystalline ribbon during the dynamic bending process to detect the magnetic properties of the nanocrystalline ribbon during the repeated bending of the bending component, thereby evaluating its magnetic stability under cyclic stress. Similarly, by adjusting the angle range of a, it can be obtained that the maximum bending angle range that the nanocrystalline ribbon can withstand during dynamic bending under the premise that the nanocrystalline ribbon can maintain magnetic stability. When the nanocrystalline ribbon is used in a scenario where dynamic bending occurs, the test result can be used as a reference.

[0040] Furthermore, the bending assembly includes a cylinder installed on the top of the nanocrystalline strip detection box 1, the telescopic rod of the cylinder passes through the nanocrystalline strip detection box 1 and is fixedly connected to the adjustment body 16, the outer wall of the adjustment body 16 is installed with a lifting part, and the lifting part can contact the nanocrystalline strip.

[0041] When the nanocrystalline ribbon to be tested needs to be bent, the adjusting body 16 is controlled to move up and down by the cylinder, so that the lifting part on the outer wall of the adjusting body 16 drives the nanocrystalline ribbon, thereby achieving the purpose of bending the nanocrystalline ribbon.

[0042] Example 1 provides an implementation method for static bending of nanocrystalline ribbons. Figure 7 ;

[0043] The lifting part is an adjusting wheel 8, which is fixedly connected to the outer wall of the adjusting body 16, and the adjusting wheel 8 is located on one side of the nanocrystalline strip to be detected;

[0044] The magnetic detection probe 17 is connected to an external moving device, and the moving device can move the magnetic detection probe 17 along the surface of the bent nanocrystalline ribbon.

[0045] When a static bending test is required, the cylinder drives the adjusting body 16 to move, so that the adjusting wheel 8 contacts and drives the nanocrystalline strip to bend. When the nanocrystalline strip is bent to the expected angle, the mobile device controls the magnetic detection probe 17. For details, see Figure 7 The magnetic detection probe 17 will move along with the arrow to detect the surface of the nanocrystalline strip, thereby achieving the purpose of measuring the performance at different bending angles to determine the critical angle at which the magnetic properties begin to change significantly.

[0046] Among them, the moving device can adopt an XYZ high-precision moving platform, which can drive the magnetic detection probe 17 to be arbitrarily adjusted in the X-axis, Y-axis and Z-axis directions, so that the magnetic detection probe 17 can move along the surface of the nanocrystalline strip for detection at different bending angles.

[0047] It is worth mentioning that the wheel-shaped structure of the lifting part can make the stress more evenly distributed on the contact surface, reducing the risk of breakage or excessive deformation of the nanocrystalline ribbon. In addition, the sharp shape may cause scratches or other forms of damage to the surface of the nanocrystalline ribbon during the bending process, while the rotating structure causes less damage to the surface of the nanocrystalline ribbon.

[0048] Embodiment 2 provides an implementation method for dynamically bending a nanocrystalline ribbon;

[0049] The adjusting body 16 has slide grooves on both sides, and first sliders 19 are slidably installed in the two slide grooves. The first screw 6 is rotatably installed inside the adjusting body 16. The two first sliders 19 have through holes, and the through holes have internal threads. The first screw 6 passes through the through holes and meshes with the internal threads of the through holes.

[0050] The lifting part is two adjusting wheels 8, and the two adjusting wheels 8 are respectively mounted on the outer walls of the two first sliders 19. A through hole is provided in one of the adjusting wheels 8, and the magnetic detection probe 17 is installed in the through hole and always corresponds to the bent part of the nanocrystalline strip.

[0051] See also Figure 8 When a dynamic bending test is required, the first screw 6 is rotated, and the thread on the first screw 6 cooperates with the internal thread of the through hole of the first slider 19, so that the two adjusting wheels 8 clamp the nanocrystalline strip to be tested, and then the adjusting body 16 is controlled to move back and forth by the control cylinder, thereby driving the two adjusting wheels 8 to move up and down, and then driving the nanocrystalline strip to be dynamically bent. During the repeated bending of the nanocrystalline strip, the magnetic detection probe 17 can always correspond to the bent part of the nanocrystalline strip, thereby measuring the magnetic properties of the nanocrystalline strip during the repeated bending process to evaluate its magnetic stability under cyclic stress.

[0052] Furthermore, the outer wall of the adjusting body 16 is rotatably connected to two connecting rods 18 via the first rotating shaft 7 , the outer walls of the two connecting rods 18 are both provided with long grooves 9 , and the outer walls of the two second rotating shafts 11 are both fixed with third sliders 10 slidably installed in the long grooves 9 .

[0053] When testing the magnetic properties of nanocrystalline strips with different bending degrees, when the lifting part drives the nanocrystalline strip to bend, if the limiter is fixed, the nanocrystalline strip will move up and down in the middle part between the two limiters, and the part close to the limiter will also bend, which will affect the final test results.

[0054] Therefore, in the process of the lifting part driving the nanocrystalline strip to bend, the long groove 9 on the connecting rod 18 cooperates with the third slider 10 to drive the connecting rod 18 to rotate, and the connecting rod 18 drives the limiter to rotate. Since the connecting rod 18 and the nanocrystalline strip are driven by the adjusting body 16, each connecting rod 18 always maintains a parallel state with the corresponding nanocrystalline strip, so that the line connecting the centers of the two clamping rollers 3 in each limiter is always perpendicular to the nanocrystalline strip, avoiding the nanocrystalline strip from bending at the clamping roller 3, and thus achieving the goal of having only one bending place in the entire section of nanocrystalline strip, making the detection result more accurate and increasing the accuracy of the test.

[0055] Furthermore, each clamping roller 3 is coaxially fixedly connected to a friction wheel 13 via a third rotating shaft 12, a friction plate 14 is fixedly connected to the connecting rod 18, and the friction plate 14 passes between the two friction wheels 13 on the same side and is in friction contact with both of them.

[0056] When testing the magnetism of nanocrystalline strips with different bending degrees, the lifting part drives the nanocrystalline strip to bend, and the two ends of the nanocrystalline strip of the limiter will be continuously subjected to pulling force, thereby driving the clamping roller 3 in the limiter to roll. However, when driving the clamping roller 3 to passively roll, the clamping roller 3 will also give the nanocrystalline strip a pulling force in the opposite direction, and stretching will also introduce stress in the material. This stress can change the orientation and distribution of the grains and affect the magnetic properties. During the stretching process, the grains of the nanocrystalline strip may be rearranged, resulting in changes in the magnetic properties, thereby affecting the final test results.

[0057] Therefore, the friction wheel 13 is coaxially fixed by each clamping roller 3, and the friction plate 14 is fixedly connected to the connecting rod 18, and the friction plate 14 passes between the two friction wheels 13 on the same side. In the process of the jacking part driving the nanocrystalline strip to bend, the adjusting body 16 will drive the connecting rod 18 to rotate and move. During the movement, the friction plate 14 fixed on the connecting rod 18 will keep rubbing the friction wheel 13, thereby driving the friction wheel 13 to rotate. Since the friction wheel 13 and the clamping roller 3 are fixedly connected by the third rotating shaft 12, the friction wheel 13 will drive the clamping roller 3 to rotate coaxially, thereby actively rotating to send the nanocrystalline strip between the clamping rollers 3 on the same side to the middle, reducing the pulling force of the clamping roller 3 on the nanocrystalline strip, so as to reduce the pulling stress caused by the bending, so that the final test result is more accurate, so as to achieve the purpose of detecting the magnetic properties of the nanocrystalline strip at different bending degrees.

[0058] The smaller the diameter difference between the friction wheel 13 and the clamping roller 3 is, the smaller the pulling force of the clamping roller 3 on the nanocrystalline strip is.

[0059] Furthermore, slide grooves are provided on both upper and lower sides of the rotating body 4, and second sliders 5 are slidably installed in the two slide grooves. A second screw is rotatably installed inside the rotating body 4, and the second screw passes through the two second sliders 5 and is threadedly connected to the penetration points of the two second sliders 5.

[0060] When it is necessary to test the magnetic properties of the nanocrystalline strip, the nanocrystalline strip to be tested is placed between the clamping rollers 3, and the second screw is rotated. The thread on the second screw cooperates with the thread at the point where the second slider 5 is penetrated, so that the clamping rollers 3 on the same side gradually move closer to achieve the purpose of clamping the nanocrystalline strip. Then, through the cooperation of the friction wheel 13, friction plate 14 and clamping roller 3 mentioned above, the pulling force of the clamping roller 3 on the nanocrystalline strip is reduced as much as possible when it is bent, and the bent nanocrystalline strip can be restored to its original state more conveniently when a dynamic bending test is required and at the end of the test.

[0061] Furthermore, the outer wall of each clamping roller 3 is wrapped with an elastic friction layer 15 .

[0062] The elastic friction layer 15 is wrapped around the outer wall of the clamping roller 3, which can not only ensure the dynamic recovery of the nanocrystalline strip, but also more effectively reduce the pulling force of the clamping roller 3 on the nanocrystalline strip during the bending process of the nanocrystalline strip, and prevent damage to the nanocrystalline strip during clamping, thereby improving the accuracy of detection.

[0063] Furthermore, the contact surfaces of the friction wheel 13 and the friction plate 14 are both set to be rough surfaces.

[0064] Since nanocrystalline nanocrystalline ribbons are generally thin, using gears will cause large errors. The surfaces of the friction wheel 13 and the friction plate 14 are set to be rough surfaces. When the friction plate 14 moves with the connecting rod 18, the friction wheel 13 can be better rotated, thereby reducing the error, and the clamping roller 3 rotates during the movement of the friction plate 14, thereby minimizing the tensile force on the nanocrystalline ribbon and further affecting the test results, further improving the accuracy of the test, and achieving the purpose of detecting the magnetic properties of the nanocrystalline ribbon at different bending degrees.

[0065] Furthermore, the nanocrystalline strip inspection box 1 is provided with a door that can be opened or closed, and the nanocrystalline strip inspection box 1 can form an isolated space.

[0066] Studies have shown that the magnetic field strength has a great influence on the magnetic properties of nanocrystalline alloy strips. The external magnetic field may affect the magnetic properties test of nanocrystalline strips. Therefore, in order to obtain accurate test results, the test environment is placed in an independent space to avoid interference from external magnetic fields.

[0067] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0068] 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 variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nanocrystalline strip magnetic testing device, comprising a nanocrystalline strip testing box (1), characterized in that: The inner walls of the nanocrystalline strip inspection box (1) are fixedly connected to brackets (2), the outer walls of the two brackets (2) are rotatably connected to rotating bodies (4) via second rotating shafts (11), and the outer walls of the two rotating bodies (4) are rotatably mounted with limit members, the limit members comprising two clamping rollers (3) that can be adjusted to move closer or farther away; It also includes a bending assembly, which can bend the nanocrystalline strip located between the two sets of rotating bodies (4), and the bending has two states, one is static bending, and the other is dynamic bending; It also includes a detection component, wherein the detection component contains a magnetic detection probe (17), and the magnetic detection probe (17) can detect the magnetic properties of the nanocrystalline strip in two bending states; The bending assembly comprises a cylinder mounted on the top of a nanocrystalline strip inspection box (1), a telescopic rod of the cylinder passing through the nanocrystalline strip inspection box (1) and fixedly connected to an adjusting body (16), an outer wall of the adjusting body (16) being provided with a jacking portion, and the jacking portion being able to contact the nanocrystalline strip; When the bending assembly causes the nanocrystalline strip to be statically bent, the lifting portion is an adjusting wheel (8), the adjusting wheel (8) is fixedly connected to the outer wall of the adjusting body (16), and the adjusting wheel (8) is located on one side of the nanocrystalline strip to be tested; The magnetic detection probe (17) is connected to an external moving device, and the moving device can move the magnetic detection probe (17) along the surface of the bent nanocrystalline strip; When the bending assembly dynamically bends the nanocrystalline strip, the adjusting body (16) is provided with slide grooves on both upper and lower sides, and first sliders (19) are slidably mounted in the two slide grooves. A first screw (6) is rotatably mounted inside the adjusting body (16), and the two first sliders (19) are provided with through holes, and the through holes are provided with internal threads, and the first screw (6) passes through the through holes and meshes with the internal threads of the through holes. The lifting portion is two adjusting wheels (8), and the two adjusting wheels (8) are respectively mounted on the outer walls of two first sliders (19), one of the adjusting wheels (8) is provided with a through hole, and the magnetic detection probe (17) is mounted in the through hole and always corresponds to the bent portion of the nanocrystalline strip; The outer wall of the regulating body (16) is rotatably connected to two connecting rods (18) via a first rotating shaft (7); the outer walls of the two connecting rods (18) are each provided with a long groove (9); and the outer walls of the two second rotating shafts (11) are each fixed with a third sliding block (10) slidably mounted in the long groove (9).

2. The nanocrystalline ribbon magnetic testing device according to claim 1, characterized in that: Each of the clamping rollers (3) is coaxially fixedly connected to a friction wheel (13) via a third rotating shaft (12); a friction plate (14) is fixedly connected to the connecting rod (18); and the friction plate (14) passes between two friction wheels (13) on the same side and is in frictional contact with both of them.

3. The nanocrystalline ribbon magnetic testing device according to claim 2, characterized in that: The rotating body (4) is provided with a slide groove on both the upper and lower sides, and a second slider (5) is slidably mounted in the two slide grooves. A second screw is rotatably mounted inside the rotating body (4), and the second screw passes through the two second sliders (5) and is threadedly connected to the penetration points of the two second sliders (5).

4. The nanocrystalline ribbon magnetic testing device according to claim 3, characterized in that: The outer wall of each clamping roller (3) is wrapped with an elastic friction layer (15).

5. The nanocrystalline ribbon magnetic testing device according to claim 4, characterized in that: The contact surfaces of the friction wheel (13) and the friction plate (14) are both set to be rough surfaces.

6. The nanocrystalline strip magnetic testing device according to any one of claims 1 to 5, characterized in that: The nanocrystalline strip inspection box (1) is provided with a door that can be opened or closed, and the nanocrystalline strip inspection box (1) can form an isolated space.

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