A device for testing performance of electromagnetic wave absorbing materials

Abstract

The invention discloses an electromagnetic wave absorption material performance testing device, comprising a streamlined frame, wherein universal wheels are connected to the bottom of the streamlined frame on all sides, and a product loading box is fixedly connected to the upper side of one side of the streamlined frame. The direct effect of the invention is that the performance of the absorbing material can be detected in real time, product quality can be guaranteed, and the risk of customer complaints can be reduced. At the same time, the scrap loss of the product tested by the impedance analyzer can be avoided, and the cost can be saved. If only the inductance value is detected and a lower inductance value standard is set, the pass rate is very high, but defective magnetic permeability products will leak into good products. If a higher inductance value standard is set, although the magnetic permeability can be guaranteed to be above the standard, many good products will be mistakenly killed. Therefore, by adding a thickness test, the third judgment type can be realized, that is, the inductance value only changes with the magnetic permeability, so as to achieve the expected effect. The mechanism structure adopted by the design is simple and efficient, and the practical efficiency of the current electromagnetic wave absorption material performance testing device can be greatly improved.

Description

Technical field:

[0001] The invention belongs to the field of electromagnetic wave absorption material testing equipment, and in particular relates to an electromagnetic wave absorption material performance testing device. Background technology:

[0002] Absorbing material is a commonly used magnetic material that can be used for absorbing, conducting and shielding electromagnetic waves. It can play a very good role in solving electromagnetic wave EMI / ESD problems. It is an excellent material for electronic products to quickly achieve EMC electromagnetic compatibility. It can also be used in wireless fields such as wireless charging of consumer electronic products, NFC / RFID near-field communication, etc.

[0003] A functional product needs to be tested to accurately evaluate its performance. The same is true for electromagnetic wave absorbing materials. The current more accurate conventional solution is to prepare samples of the product and then use an impedance analyzer with a specific fixture to measure the magnetic permeability of the product. Its advantage is accuracy, but its disadvantages are high testing costs, expensive instruments, product damage, and time-consuming. For mass production, only random inspections can be performed, and it is impossible to test each product.

[0004] At present, the industry has a conventional method of monitoring the performance of magnetic materials such as ferrite and nanocrystalline thin sheet materials, which is to reflect the difference in material performance through inductance detection. This method is also theoretically applicable to the performance detection of absorbing materials. Its advantages are fast speed, non-destructiveness, relatively cheap instruments, and 100% product detection with simple tooling. However, the disadvantage of the inductance value detection method is that the inductance value results of absorbing material sheets with the same magnetic permeability are quite different, and it is impossible to accurately determine whether the product performance (magnetic permeability) meets the requirements. Therefore, the present invention designs an electromagnetic wave absorbing material performance testing device to fill the current gap in this field. Summary of the invention:

[0005] The purpose of the present invention is to provide an electromagnetic wave absorbing material performance testing device in order to solve the above problems, thereby solving the existing problems.

[0006] In order to solve the above problems, the present invention provides a technical solution:

[0007] A device for testing the performance of electromagnetic wave absorbing materials, comprising a streamlined frame, wherein universal wheels are connected to the bottom of the streamlined frame on all sides, a product loading box is fixedly connected to the top of one side of the streamlined frame, a good product box is connected to the top of the other side of the streamlined frame away from the universal wheel, a driving wheel is arranged on one side of the upper end of the streamlined frame, a No. 2 servo motor is connected below the driving wheel and on one side of the streamlined frame, a power belt is connected between the output end of the No. 2 servo motor and the rotating shaft of the driving wheel, a driven wheel is arranged on the upper end surface of the streamlined frame and on the side close to the product loading box, a conveyor belt is connected between the driven wheel and the driving wheel, and a conveyor belt is arranged on one side of the conveyor belt and on the A control box is connected to the streamline frame, a defective product box is provided on the upper end surface of the streamline frame and on a side away from the control box, and the conveyor belt passes through the bottom end of the defective product box, the conveyor belt is away from the side of the control box and fixedly connected with a No. 1 automatic loading and unloading structure above the streamline frame, a No. 2 automatic loading and unloading structure is fixedly connected to one side of the No. 1 automatic loading and unloading structure and above the streamline frame, the No. 1 automatic loading and unloading structure and the No. 2 automatic loading and unloading structure have the same structure and both include a No. 1 guide rod, a No. 2 guide rod, a coupling, a threaded rod, an adjusting nut, a No. 1 slider, a No. 2 slider, a No. 1 cylinder, a No. 1 piston rod, a vacuum pump and a sorting suction cup.

[0008] Preferably, a fixed frame is provided between the No. 1 automatic loading and unloading structure and the No. 2 automatic loading and unloading structure, and the conveyor belt is inserted through the fixed frame, one side of the No. 1 automatic loading and unloading structure and the No. 2 automatic loading and unloading structure are connected to a No. 1 servo motor protection box, the bottom of the No. 1 servo motor protection box is provided with a motor base, the upper end of the motor base is connected to a No. 1 servo motor, a No. 1 guide rod is connected between the upper part of the inner side walls of the No. 1 automatic loading and unloading structure and the No. 2 automatic loading and unloading structure, and the No. 1 guide rod is located between the inner side walls of the No. 1 automatic loading and unloading structure and the No. 2 automatic loading and unloading structure and at the No. 1 guide rod. A No. 2 guide rod is connected below the rod, a threaded rod is provided below the No. 1 guide rod and above the No. 2 guide rod, one end of the threaded rod is connected to the upper end bearing of the inner wall of the No. 1 automatic loading and unloading structure and the No. 2 automatic loading and unloading structure, the other end of the threaded rod passes through the No. 1 automatic loading and unloading structure and the No. 2 automatic loading and unloading structure and is connected to the No. 1 servo motor through a coupling, an adjusting nut is provided on the threaded rod, a No. 1 slider is slidably connected to the No. 1 guide rod, and a No. 2 slider is slidably connected to the No. 2 guide rod, and the upper and lower ends of the adjusting nut are respectively connected to the No. 1 slider and the No. 2 slider.

[0009] Preferably, the lower end of the No. 2 slider is connected to the No. 1 cylinder, the lower end of the No. 1 cylinder is connected to the No. 1 piston rod, the end of the No. 1 piston rod away from the No. 1 cylinder is connected to a vacuum pump, the end of the vacuum pump away from the No. 1 piston rod is connected to a sorting suction cup, a No. 2 cylinder is provided on the outer top of the fixed frame, the lower end of the No. 2 cylinder is connected to the No. 2 piston rod, and the No. 2 piston rod passes through the top of the fixed frame, the lower end of the No. 2 piston rod is connected to a connecting plate, the lower end of the connecting plate is connected to an inductance coil, the connecting plate is away from one end surface of the No. 2 piston rod and is connected to a thickness testing head in the inductance coil, one end of the thickness testing head is connected to a No. 1 connecting wire, a number of absorbing material sheets are evenly arranged on the conveyor belt, a No. 2 connecting wire is connected to a side wall in the fixed frame away from the No. 1 connecting wire, and the other end of the No. 2 connecting wire is connected to the inductance coil.

[0010] Preferably, the thickness test head is externally connected to a control computer via a No. 1 connection line, the inductor coil is externally connected to an LCR test machine via a No. 2 connection line, and the LCR test machine is electrically connected to the control computer.

[0011] Preferably, the inductor coil is a hollow structure.

[0012] Preferably, the No. 1 automatic loading and unloading structure is symmetrically arranged with the No. 2 automatic loading and unloading structure through a fixed frame, and the product loading box is symmetrically arranged with the good product box through a fixed frame.

[0013] Preferably, the second servo motor is connected to the driving wheel through a power belt.

[0014] Preferably, the No. 1 guide rod, the No. 2 guide rod and the threaded rod are all arranged parallel to each other.

[0015] The beneficial effects of the present invention are as follows: the present invention provides an electromagnetic wave absorption material performance testing device. The present invention has the direct effect of being able to detect the performance of the absorbing material in real time, ensuring product quality, reducing the risk of customer complaints, and avoiding the scrapping and loss of products tested by an impedance analyzer, thereby saving costs. If only the inductance value is detected and a lower inductance value standard is set, the pass rate is very high, but defective magnetic permeability products will leak into good products. If a higher inductance value standard is set, although it can ensure that the magnetic permeability is above the standard, many good products will be mistakenly killed. Therefore, by adding a thickness test, a third type of judgment can be achieved, that is, the inductance value only changes with the magnetic permeability, thereby achieving the expected effect. The mechanism structure adopted in this design is simple and efficient, and can greatly improve the practical efficiency of the current electromagnetic wave absorption material performance testing device. Description of the drawings:

[0016] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0017] Figure 1It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of the fixing frame of the present invention;

[0019] Figure 3 It is a schematic diagram of the enlarged structure of point A of the present invention.

[0020] In the figure; 1. Streamline frame; 2. Universal wheel; 3. Product loading box; 4. Good product box; 5. No. 1 automatic loading and unloading structure; 6. No. 2 automatic loading and unloading structure; 7. No. 1 servo motor protection box; 8. Motor base; 9. No. 1 servo motor; 10. No. 1 guide rod; 11. No. 2 guide rod; 12. Coupling; 13. Threaded rod; 14. Adjusting nut; 15. No. 1 slider; 16. No. 2 slider; 17. No. 1 cylinder; 18. No. 1 piston rod; 19. Vacuum pump; 20. Sorting suction cup; 21. Driven wheel; 22. Driving wheel; 23. Conveyor belt; 24. No. 2 servo motor; 25. Power belt; 26. Defective product box; 27. Control box; 28. Fixed frame; 29. ​​No. 2 cylinder; 30. No. 2 piston rod; 31. Connecting plate; 32. Thickness test head; 33. Connecting wire; 34. No. 2 connecting wire; 35. Absorbing material sheet; 36. Inductor coil. Specific implementation method:

[0021] like Figure 1-3As shown, this specific embodiment adopts the following technical scheme: an electromagnetic wave absorption material performance testing device, comprising a streamlined frame 1, the bottom of the streamlined frame 1 is connected with universal wheels 2 all around, a product loading box 3 is fixedly connected to the top of one side of the streamlined frame 1, and a good product box 4 is connected to the top of the other side of the streamlined frame 1 away from the universal wheel 2, a driving wheel 22 is provided on one side of the upper end of the streamlined frame 1, a second servo motor 24 is connected below the driving wheel 22 and on one side of the streamlined frame 1, a power belt 25 is connected between the output end of the second servo motor 24 and the rotating shaft of the driving wheel 22, a driven wheel 21 is provided on the upper end surface of the streamlined frame 1 and on the side close to the product loading box 3, a conveyor belt 23 is connected between the driven wheel 21 and the driving wheel 22, and the conveyor belt 23 A control box 27 is connected to the streamline frame 1 on one side, a defective product box 26 is provided on the upper end surface of the streamline frame 1 and away from the control box 27, and the conveyor belt 23 passes through the bottom end of the defective product box 26, the conveyor belt 23 is away from the control box 27 and is fixedly connected to the one side of the streamline frame 1 with a No. 1 automatic loading and unloading structure 5, and a No. 2 automatic loading and unloading structure 6 is fixedly connected to one side of the No. 1 automatic loading and unloading structure 5 and above the streamline frame 1, the No. 1 automatic loading and unloading structure 5 and the No. 2 automatic loading and unloading structure 6 have the same structure and both include a No. 1 guide rod 10, a No. 2 guide rod 11, a coupling 12, a threaded rod 13, an adjusting nut 14, a No. 1 slider 15, a No. 2 slider 16, a No. 1 cylinder 17, a No. 1 piston rod 18, a vacuum pump 19 and a sorting suction cup 20.

[0022] Among them, a fixed frame 28 is provided between the No. 1 automatic loading and unloading structure 5 and the No. 2 automatic loading and unloading structure 6, and the conveyor belt 23 is inserted through the fixed frame 28, and one side of the No. 1 automatic loading and unloading structure 5 and the No. 2 automatic loading and unloading structure 6 is connected to a No. 1 servo motor protection box 7, and a motor base 8 is provided at the bottom of the No. 1 servo motor protection box 7. A No. 1 servo motor 9 is connected to the upper end of the motor base 8, and a No. 1 guide rod 10 is connected between the upper part of the inner side walls of the No. 1 automatic loading and unloading structure 5 and the No. 2 automatic loading and unloading structure 6, and a No. 2 guide rod 10 is connected between the inner side walls of the No. 1 automatic loading and unloading structure 5 and the No. 2 automatic loading and unloading structure 6 and below the No. 1 guide rod 10. A guide rod 11, a threaded rod 13 is provided below the guide rod 10 and above the guide rod 11, one end of the threaded rod 13 is connected to the upper end bearing of the inner wall of the automatic loading and unloading structure 5 No. 1 and the automatic loading and unloading structure 6 No. 2, the other end of the threaded rod 13 passes through the automatic loading and unloading structure 5 No. 1 and the automatic loading and unloading structure 6 No. 2 and is connected to the servo motor 9 through the coupling 12, an adjusting nut 14 is threadedly sleeved on the threaded rod 13, a slider 15 No. 1 is slidably connected to the guide rod 10 No. 1, a slider 16 No. 2 is slidably connected to the guide rod 11 No. 2, the upper and lower ends of the adjusting nut 14 are respectively connected to the slider 15 No. 1 and the slider 16 No. 2.

[0023] The lower end of the No. 2 slider 16 is connected to the No. 1 cylinder 17, the lower end of the No. 1 cylinder 17 is connected to the No. 1 piston rod 18, the end of the No. 1 piston rod 18 away from the No. 1 cylinder 17 is connected to a vacuum pump 19, the end of the vacuum pump 19 away from the No. 1 piston rod 18 is connected to a sorting suction cup 20, the top of the fixed frame 28 is provided with a No. 2 cylinder 29, the lower end of the No. 2 cylinder 29 is connected to a No. 2 piston rod 30, and the No. 2 piston rod 30 is inserted through the top of the fixed frame 28, and the No. 2 piston rod 30 is connected to the No. 1 piston rod 30. 0 is connected to a connecting plate 31 at the lower end, and an inductance coil 36 is connected to the lower end of the connecting plate 31. The connecting plate 31 is far away from one end surface of the No. 2 piston rod 30 and a thickness test head 32 is connected in the inductance coil 36. One end of the thickness test head 32 is connected to a No. 1 connecting wire 33. A plurality of absorbing material sheets 35 are evenly arranged on the conveyor belt 23. A No. 2 connecting wire 34 is connected to a side wall in the fixing frame 28 far away from the No. 1 connecting wire 33, and the other end of the No. 2 connecting wire 34 is connected to the inductance coil 36.

[0024] The thickness test head 32 is connected to an external control computer via a No. 1 connection line 33 , the inductor 36 is connected to an external LCR tester via a No. 2 connection line 34 , and the LCR tester is electrically connected to the control computer.

[0025] The inductor coil 36 is a hollow structure.

[0026] Among them, the No. 1 automatic loading and unloading structure 5 is symmetrically arranged with the No. 2 automatic loading and unloading structure 6 through the fixing frame 28, and the product loading box 3 is symmetrically arranged with the good product box 4 through the fixing frame 28.

[0027] The second servo motor 24 is connected to the driving wheel 22 via a power belt 25 .

[0028] The first guide rod 10 , the second guide rod 11 and the threaded rod 13 are all arranged parallel to each other.

[0029] Specifically: When the present invention is in use, the inductor 36 is lifted by the No. 2 cylinder 29, and the material to be tested is sent forward through the conveyor belt 23. The sorting suction cup 20 in the No. 1 automatic loading and unloading structure 5 grabs the material and puts it on the conveyor belt 23. After passing through the fixed frame 28, the No. 2 cylinder 29 drives the thickness test head 32 and the inductor 36 to descend, and the inductance value change and thickness value of the inductor 36 are obtained, thereby determining the change in the magnetic permeability of the magnetic material. The data is transmitted to the external LCR tester and the control computer through the No. 1 connecting line 33 and the No. 2 connecting line 34. The control computer then determines whether the material is qualified according to the set standard limit value by the test system software, and finally the defective material is sorted out by the sorting suction cup 20 in the No. 2 automatic loading and unloading structure 6. The defective products and good products are respectively captured into the corresponding defective product box 26 or good product box 4. The direct effect of the present invention is that it can detect the performance of the absorbing material in real time, ensure product quality, reduce the risk of customer complaints, and avoid the scrap loss of the impedance analyzer test product, saving costs. If only the inductance value is detected and a lower inductance value standard is set, the pass rate is very high, but the magnetic permeability defective products will leak into the good products. If a higher inductance value standard is set, although it can ensure that the magnetic permeability is above the standard, many good products will be mistakenly killed. Therefore, by adding thickness test, the third type of judgment can be realized, that is, the inductance value only changes with the magnetic permeability, and the expected effect is achieved. The mechanism structure adopted in this design is simple and efficient, which can greatly improve the practical efficiency of the current electromagnetic wave absorption material performance testing device.

[0030] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An electromagnetic wave absorbing material performance testing device, comprising a streamlined frame (1), characterized in that: The bottom of the streamlined frame (1) is connected with universal wheels (2) all around, a product loading box (3) is fixedly connected to the top of one side of the streamlined frame (1), a good product box (4) is connected to the top of the other side of the streamlined frame (1) away from the universal wheel (2), a driving wheel (22) is provided on one side of the upper end of the streamlined frame (1), a second servo motor (24) is connected below the driving wheel (22) and on one side of the streamlined frame (1), a power belt (25) is connected between the output end of the second servo motor (24) and the rotating shaft of the driving wheel (22), a driven wheel (21) is provided on the upper end surface of the streamlined frame (1) and on the side close to the product loading box (3), a conveyor belt (23) is connected between the driven wheel (21) and the driving wheel (22), a control box (27) is connected on one side of the conveyor belt (23) and on the streamlined frame (1), and the streamlined frame (1) is provided with a control box (27). A defective product box (26) is provided on the upper end surface of the line frame (1) and on a side away from the control box (27), and the conveyor belt (23) passes through the bottom end of the defective product box (26). A first automatic loading and unloading structure (5) is fixedly connected to the conveyor belt (23) on a side away from the control box (27) and above the streamline frame (1). A second automatic loading and unloading structure (6) is fixedly connected to one side of the first automatic loading and unloading structure (5) and above the streamline frame (1). The first automatic loading and unloading structure (5) and the second automatic loading and unloading structure (6) have the same structure and both include a first guide rod (10), a second guide rod (11), a coupling (12), a threaded rod (13), an adjusting nut (14), a first slider (15), a second slider (16), a first cylinder (17), a first piston rod (18), a vacuum pump (19) and a sorting suction cup (20);A fixed frame (28) is provided between the No. 1 automatic loading and unloading structure (5) and the No. 2 automatic loading and unloading structure (6), and the conveyor belt (23) passes through the fixed frame (28). One side of the No. 1 automatic loading and unloading structure (5) and the No. 2 automatic loading and unloading structure (6) are both connected to a No. 1 servo motor protection box (7). A motor base (8) is provided at the bottom of the No. 1 servo motor protection box (7). The upper end of the motor base (8) is connected to a No. 1 servo motor (9). A No. 1 guide rod (10) is connected between the upper sides of the inner side walls of the No. 1 automatic loading and unloading structure (5) and the No. 2 automatic loading and unloading structure (6). A No. 2 guide rod (10) is connected between the inner side walls of the No. 1 automatic loading and unloading structure (5) and the No. 2 automatic loading and unloading structure (6) and below the No. 1 guide rod (10). 1), a threaded rod (13) is provided below the first guide rod (10) and above the second guide rod (11), one end of the threaded rod (13) is connected to the upper end bearing of the inner wall of the first automatic loading and unloading structure (5) and the second automatic loading and unloading structure (6), the other end of the threaded rod (13) passes through the first automatic loading and unloading structure (5) and the second automatic loading and unloading structure (6) and is connected to the first servo motor (9) through a coupling (12), an adjusting nut (14) is threadedly sleeved on the threaded rod (13), a first slider (15) is slidably connected to the first guide rod (10), a second slider (16) is slidably connected to the second guide rod (11), and the upper and lower ends of the adjusting nut (14) are respectively connected to the first slider (15) and the second slider (16); The lower end of the No. 2 slider (16) is connected to the No. 1 cylinder (17), the lower end of the No. 1 cylinder (17) is connected to the No. 1 piston rod (18), the end of the No. 1 piston rod (18) away from the No. 1 cylinder (17) is connected to a vacuum pump (19), the end of the vacuum pump (19) away from the No. 1 piston rod (18) is connected to a sorting suction cup (20), the top of the fixed frame (28) is provided with a No. 2 cylinder (29), the lower end of the No. 2 cylinder (29) is connected to the No. 2 piston rod (30), and the No. 2 piston rod (30) is inserted through the top of the fixed frame (28), and the No. 2 piston rod (30) ) is connected to a connection plate (31) at the lower end, an inductance coil (36) is connected to the connection plate (31), the connection plate (31) is far away from one end surface of the No. 2 piston rod (30) and a thickness test head (32) is connected inside the inductance coil (36), one end of the thickness test head (32) is connected to a No. 1 connection line (33), a plurality of absorbing material sheets (35) are evenly arranged on the conveyor belt (23), a No. 2 connection line (34) is connected to a side wall of the fixed frame (28) far away from the No. 1 connection line (33), and the other end of the No. 2 connection line (34) is connected to the inductance coil (36); During the test, the thickness test head and the inductance coil are driven downward by the No. 2 air cylinder to obtain the change in inductance value and thickness value of the inductance coil, thereby determining the change in magnetic permeability of the magnetic material.

2. The electromagnetic wave absorption material performance testing device according to claim 1, characterized in that: The thickness test head (32) is externally connected to a control computer via a No. 1 connection line (33), the inductor coil (36) is externally connected to an LCR test machine via a No. 2 connection line (34), and the LCR test machine is electrically connected to the control computer.

3. The electromagnetic wave absorption material performance testing device according to claim 1, characterized in that: The inductor coil (36) is a hollow structure.

4. The electromagnetic wave absorption material performance testing device according to claim 1, characterized in that: The first automatic loading and unloading structure (5) is symmetrically arranged with the second automatic loading and unloading structure (6) via a fixed frame (28), and the product loading box (3) is symmetrically arranged with the good product box (4) via a fixed frame (28).

5. The electromagnetic wave absorption material performance testing device according to claim 1, characterized in that: The second servo motor (24) is connected to the driving wheel (22) through a power belt (25).

6. The electromagnetic wave absorption material performance testing device according to claim 1, characterized in that: The first guide rod (10), the second guide rod (11) and the threaded rod (13) are all arranged parallel to each other.

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