Electromagnetic shielding test device and method

Abstract

The invention discloses an electromagnetic shielding testing device and method, and relates to the technical field of electromagnetic shielding, the electromagnetic shielding testing device comprises a bottom plate, the bottom plate is provided with a magnetic induction device, the magnetic induction device is provided with a drawing device, the bottom plate is further provided with a reel device, the bottom end of the reel device is sleeved with a transmission belt, and the transmission belt is provided with a transmission shaft. The other end of the transmission belt is arranged on a transmission device in a sleeving mode, the upper end of the transmission device is arranged at one position of a driving device in a sleeving mode, a reciprocating device is arranged at the driving end of the driving device, and a magnetic generating device is arranged at the lower end of the reciprocating device. According to the electromagnetic shielding testing device and method, the reciprocating device is arranged, the magnetic generation device moves above the electromagnetic shielding plate in a circulating and reciprocating mode all the time, meanwhile, the magnet is arranged at the bottom of the electromagnetic shielding plate, the electromagnetic shielding plate can sense the force of a magnetic field, and a drawing pen is driven to move up and down on drawing paper in a reciprocating mode; and magnetic induction at different positions is observed.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic shielding technology, and in particular to an electromagnetic shielding testing device and method. Background Technology

[0002] Electromagnetic interference (EMI) emerged with the development of electronic and electrical technologies. EMI exists in all fields of electronic and electrical technology. EMI generated by a large number of electronic and electrical systems or equipment in use can affect human health and also impact and harm the safety and reliability of these systems or equipment. Electromagnetic shielding materials are antistatic materials with a certain degree of electromagnetic shielding effect. They are mainly used as fillers in conductive polymer materials. Silver was the earliest developed conductive filler. During the production and processing of electromagnetic shielding materials, it is necessary to test the shielding capability of the finished materials to understand their specific performance.

[0003] However, existing electromagnetic shielding testing devices still have some drawbacks in use, such as:

[0004] Existing electromagnetic shielding testing devices mostly use testing equipment to test electromagnetic shielding materials. During the testing process, the electromagnetic shielding material to be tested is placed in a fixing mechanism in a test container, and then the testing element is activated to perform the test operation. However, the fixing mechanism in the traditional test container is a fixed design, which means that the electromagnetic shielding material can only maintain one test state, namely vertical or horizontal. This not only makes the function relatively simple and the test state relatively limited, but also cannot achieve multi-angle comprehensive fixing test of the electromagnetic shielding material, which may lead to inaccurate test results. To address the existing problems, we propose an electromagnetic shielding testing device and method. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide an electromagnetic shielding testing device and method to solve the problem that the fixing mechanism set in the traditional test container is a fixed design, which means that the electromagnetic shielding material can only be kept in one test state, that is, vertical or horizontal. Not only is the function relatively simple when used, making the test state relatively limited, but it also cannot realize multi-angle comprehensive fixing test of electromagnetic shielding material, which may lead to inaccurate test results.

[0006] To achieve the above objectives, the present invention provides an electromagnetic shielding testing device, comprising a base plate, a magnetic induction device on the base plate, a drawing device on the magnetic induction device, a scrolling device on the base plate, a transmission belt sleeved at the bottom end of the scrolling device, the other end of the transmission belt sleeved on the transmission device, a clamping device on the base plate, an electromagnetic shielding plate on the clamping device, an upper end of the transmission device sleeved on a drive device, a bottom end of the drive device fixedly connected to the upper surface of the base plate, a reciprocating device on the drive end of the drive device, a magnetic generating device on the lower end of the reciprocating device, and the magnetic generating device being disposed on the upper side of the electromagnetic shielding plate;

[0007] The magnetic induction device includes a spring, a support platform, and a magnet. The lower end of the spring is connected to the upper surface of the base plate, the upper end of the spring is connected to the lower surface of the support platform, and the lower end of the magnet is connected to the upper surface of the support platform.

[0008] The drawing device includes a threaded seat and a drawing pen. One end of the drawing pen has a threaded outer ring, and the threaded end of the drawing pen is adapted to the threaded seat. The lower surface of the threaded seat is connected to the upper surface of the support platform.

[0009] Furthermore, the roll assembly includes a rotating base, a paper roll shaft, a pressure roller shaft, and drawing paper. Two rotating bases are mounted on a base plate, and two paper roll shafts are respectively positioned at the center of the upper surface of the two rotating bases. The pressure roller shaft is mounted on the base plate and rotatably engages with one rotating base. The drawing paper has a roll-type structure and is fitted onto one rotating base. One end of the drawing paper is connected to a surface of the other rotating base. Both ends of the transmission belt are respectively fitted onto the two rotating bases, and the drawing pen is movably engaged with the drawing paper.

[0010] Furthermore, the transmission device includes a horizontal gear, a transmission gear, a gear seat, and a drive belt. A cylindrical rotating protrusion is provided under the horizontal gear. One end of the transmission belt is sleeved on the protrusion under the horizontal gear. The horizontal gear meshes with the transmission gear. A rotating shaft is provided on one side of the transmission gear. The transmission gear rotates on one side of the gear seat through the rotating shaft. The lower end of the gear seat is connected to the upper surface of the base plate. The lower end of the drive belt is sleeved on the rotating shaft on one side of the transmission gear.

[0011] Furthermore, the driving device includes a support frame, a drive motor, and a drive shaft. The lower ends of the two support frames are connected to the upper surface of the base plate, and the upper ends of the two support frames are respectively connected to the two side surfaces of the drive motor. One end of the drive shaft is connected to the output end of the drive motor, and the upper end of the drive belt is sleeved on the drive shaft.

[0012] Furthermore, the reciprocating device includes a rotating disk, an eccentric shaft, a reciprocating rod, an upper fixed frame, and a lower fixed frame. The center of one surface of the rotating disk is connected to one end of the drive shaft, and the edge of the other surface of the rotating disk is provided with an eccentric shaft. The reciprocating rod has a strip-shaped through hole in the middle, and the eccentric shaft is movably engaged in the strip-shaped through hole in the middle of the reciprocating rod. One surface of the lower fixed frame is connected to one surface of the drive motor. One end of the upper fixed frame is disposed on one surface of the lower fixed frame, and one end of the upper fixed frame has a through hole. The upper part of the reciprocating rod slides back and forth in the through hole of the upper fixed frame, and one end of the lower fixed frame has a through hole. The lower part of the reciprocating rod slides back and forth in the through hole of the lower fixed frame.

[0013] Furthermore, the lower end of the reciprocating rod is connected to the upper surface of the magnetic generator.

[0014] Furthermore, the clamping device includes clamping rods, C-shaped slots, and fixing bolts. The lower surfaces of the four C-shaped slots are respectively connected to the upper ends of the four clamping rods. The upper surfaces of the four C-shaped slots are provided with threaded through holes. The four fixing bolts are respectively adapted to the threaded through holes on the four C-shaped slots.

[0015] Furthermore, the base plate is also provided with casters and omnidirectional wheels. The upper end of the omnidirectional wheel is fixedly connected to the tip of the lower surface of the base plate, and the two casters are symmetrically arranged on the lower side of the base plate.

[0016] A method of using an electromagnetic shielding testing device includes the following steps:

[0017] S1: Install equipment:

[0018] S101: Place the two sides of the electromagnetic shielding plate into the four C-shaped slots;

[0019] S102: Rotate the four fixing bolts set on the four C-shaped slots so that the bottom ends of the four fixing bolts press against the two sides of the electromagnetic shielding plate to fix it.

[0020] S103: Align the threaded end of the drawing pen with the threaded hole of the threaded seat, rotate the drawing pen to push it inward, and fix the drawing pen in the threaded seat;

[0021] S2: Equipment used:

[0022] S201: Activate the magnetic generator. The magnet descends after being subjected to the magnetic force of the magnetic generator, and at the same time, it drives the drawing pen 302 to draw the falling trajectory on the drawing paper.

[0023] S202: Start the drive motor, the drive motor drives the drive shaft to rotate, the drive shaft drives the rotating disk to rotate, and the eccentric shaft set on the rotating disk rotates at the same time, driving the reciprocating rod to move up and down reciprocally on the fixed track of the upper fixed frame and the lower fixed frame.

[0024] S203: When the drive shaft drives the rotating disk to rotate, it will simultaneously drive the drive belt to drive the transmission. The drive belt drives the transmission gear to rotate, the transmission gear drives the horizontal gear to rotate, and the horizontal gear drives the rotating seat to rotate through the transmission belt, so that the paper roll shaft drives the drawing paper to roll. When the drawing pen moves up and down reciprocally under the force of the magnetic generator, it can draw a magnetic force curve change diagram on the drawing paper.

[0025] S3: Data Analysis

[0026] S301: When the magnetic generator moves up and down, the magnetic field applies force to the magnet through the electromagnetic shielding plate. The magnet drives the drawing pen to move up and down to draw on the drawing paper. At the same time, the drawing paper rolls in one direction, causing the drawing pen to draw a wave curve on the drawing paper. The change in the magnitude of the magnetic force transmitted by the magnetic generator at different distances above the electromagnetic shielding plate can be observed.

[0027] S302: Remove the electromagnetic shielding plate and repeat the above steps. The drawing pen can draw a wave curve on the drawing paper. When the magnetic force curve with the electromagnetic shielding plate installed is compared with the magnetic force curve without the electromagnetic shielding plate installed, the electromagnetic shielding capability of the electromagnetic shielding plate can be determined.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] In this invention, a reciprocating device is set up so that the magnetic generator moves continuously and cyclically above the electromagnetic shielding plate. At the same time, a magnet is set at the bottom of the electromagnetic shielding plate so that it can sense the force of the magnetic field and drive the drawing pen to move back and forth on the drawing paper to observe the magnetic induction at different positions. At the same time, a transmission device is set up so that the drawing paper is rolled up synchronously, so that the drawing pen can draw a magnetic force change curve on the drawing paper, which can more intuitively observe the magnetic force change. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an electromagnetic shielding testing device according to the present invention;

[0031] Figure 2 This is an isometric structural diagram of an electromagnetic shielding testing device according to the present invention;

[0032] Figure 3 This is a schematic diagram of the left side of an electromagnetic shielding testing device according to the present invention;

[0033] Figure 4 This is a front view schematic diagram of an electromagnetic shielding testing device according to the present invention;

[0034] Figure 5 For the present invention Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0035] Figure 6 For the present invention Figure 2 A magnified view of the structure at point B in the middle;

[0036] Figure 7 For the present invention Figure 3 A magnified schematic diagram of the structure at point C.

[0037] In the diagram: 1. Base plate; 101. Caster wheel; 102. Transfer wheel; 200. Magnetic induction device; 201. Spring; 202. Support platform; 203. Magnet; 300. Drawing device; 301. Threaded seat; 302. Drawing pen; 400. Roller assembly; 401. Rotating seat; 402. Paper roll; 403. Pressure roller; 404. Drawing paper; 5. Drive belt; 600. Transmission device; 601. Horizontal gear; 602. Transmission gear; 6. 03. Gear seat; 604. Drive belt; 700. Clamping device; 701. Clamping rod; 702. C-shaped slot; 703. Fixing bolt; 8. Electromagnetic shielding plate; 900. Drive device; 901. Support frame; 902. Drive motor; 903. Drive shaft; 1000. Reciprocating device; 1001. Rotating disk; 1002. Eccentric shaft; 1003. Reciprocating rod; 1004. Upper fixed frame; 1005. Lower fixed frame; 11. Magnetic generating device. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0039] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] Please refer to the following: Figures 1-7 ,in, Figure 1 This is a schematic diagram of the overall structure of an electromagnetic shielding testing device according to the present invention; Figure 2 This is an isometric structural diagram of an electromagnetic shielding testing device according to the present invention;

[0041] Figure 3 This is a schematic diagram of the left side of an electromagnetic shielding testing device according to the present invention; Figure 4 This is a front view schematic diagram of an electromagnetic shielding testing device according to the present invention; Figure 5 For the present invention Figure 1 A magnified schematic diagram of the partial structure at point A in the middle; Figure 6 For the present invention Figure 2 A magnified view of the structure at point B in the middle; Figure 7 For the present invention Figure 3 A magnified schematic diagram of the structure at point C.

[0042] An electromagnetic shielding testing device includes a base plate 1, on which a magnetic induction device 200 is provided, and a drawing device 300 is provided on the magnetic induction device 200. A scroll device 400 is also provided on the base plate 1, with a transmission belt 5 sleeved at the bottom end of the scroll device 400. The other end of the transmission belt 5 is sleeved on a transmission device 600. A clamping device 700 is also provided on the base plate 1, and an electromagnetic shielding plate 8 is provided on the clamping device 700. The upper end of the transmission device 600 is sleeved on a drive device 900, and the bottom end of the drive device 900 is fixedly connected to the upper surface of the base plate 1. A reciprocating device 1000 is provided at the drive end of the drive device 900, and a magnetic generator 11 is provided at the lower end of the reciprocating device 1000. The magnetic generator 11 is located on the upper side of the electromagnetic shielding plate 8.

[0043] The base plate 1 serves as a base for fixing and mounting the main components of the device. A magnetic induction device 200 is mounted on the base plate 1. When the magnetic induction device 200 is subjected to magnetic force, it drives the drawing device 300 mounted on it to draw on the scroll device 400. When the drive device 900 is activated, it drives the reciprocating device 1000, which in turn drives the magnetic generator 11 to move up and down. Simultaneously, the lower magnetic induction device 200 is also driven to draw due to the up-and-down movement of the magnetic generator 11. The drawing device 300 moves up and down on the scroll device 400 to draw, while the drive device 900 drives the transmission device 600 to operate. The transmission device 600 rotates the scroll device 400 through the transmission belt 5, so that the drawing device 300 can draw magnetic induction wavy lines on the scroll device 400. Then, the electromagnetic shielding plate 8 is installed on the clamping device 700. By comparing the magnetic induction wavy lines drawn before and after the installation of the electromagnetic shielding plate 8, the effect of the electromagnetic shielding plate 8 can be observed, and the different shielding effects produced by the distance of the magnetic force can be observed.

[0044] The magnetic induction device 200 includes a spring 201, a support platform 202, and a magnet 203. The lower end of the spring 201 is connected to the upper surface of the base plate 1, the upper end of the spring 201 is connected to the lower surface of the support platform 202, and the lower end of the magnet 203 is connected to the upper surface of the support platform 202.

[0045] Among them, the magnetic generating device 11 is an electromagnet, which generates a constant intensity of magnetism, and this magnetism is the same as that of the magnet 203. Therefore, when the magnetic generating device 11 approaches the magnetic induction device 200, the magnetic induction device 200 will be pushed downward by it.

[0046] The function of spring 201 is to support support platform 202. The function of support platform 202 is to install magnet 203 and threaded seat 301. The function of magnet 203 is to sense the magnetic force of magnetic generator 11. By sensing the reciprocating movement of magnetic generator 11, different forces are generated to apply pressure to spring 201 and support platform 202.

[0047] The drawing device 300 includes a threaded seat 301 and a drawing pen 302. One end of the drawing pen 302 has a threaded outer ring. The threaded end of the drawing pen 302 is adapted to the threaded seat 301. The lower surface of the threaded seat 301 is connected to the upper surface of the support platform 202.

[0048] The threaded seat 301 is used to install the drawing pen 302, so that the drawing pen 302 can be installed and removed on the threaded seat 301 for easy replacement. The drawing pen 302 is used to sense the displacement of the magnetic generator 11 and drive the magnetic induction device 200 and the drawing device 300 to draw the magnetic force change curve on the drawing paper 404.

[0049] Further, the roll device 400 includes a rotating seat 401, a paper roll 402, a pressure roller 403, and drawing paper 404. The two rotating seats 401 are mounted on the base plate 1, and the two paper rolls 402 are respectively mounted at the center of the upper surface of the two rotating seats 401. The pressure roller 403 is mounted on the base plate 1 and is rotatably engaged with one of the rotating seats 401. The drawing paper 404 has a roll-type structure and is sleeved on one of the rotating seats 401. One end of the drawing paper 404 is connected to one surface of the other rotating seat 401. The two ends of the transmission belt 5 are respectively sleeved on the two rotating seats 401. The drawing pen 302 is movably engaged with the drawing paper 404.

[0050] The rotating base 401 serves as a rotating base to support and fix the paper roll 402. A transmission belt 5 is also installed around the rotating base 401, which drives the rotating base 401 to rotate. The main function of the paper roll 402 is to fix the drawing paper 404. When the magnetic generator 11 moves up and down, the rotating base 401 drives the drawing paper 404 to roll in one direction, allowing the drawing pen 302 to draw long lines on the drawing paper 404. The pressure roller 403 assists the paper roll 402 in keeping the drawing paper 404 taut while it is rolling.

[0051] Furthermore, the transmission device 600 includes a horizontal gear 601, a transmission gear 602, a gear seat 603, and a drive belt 604. The horizontal gear 601 has a cylindrical rotating protrusion under it. One end of the transmission belt 5 is sleeved on the protrusion under the horizontal gear 601. The horizontal gear 601 meshes with the transmission gear 602. A rotating shaft is provided on one side of the transmission gear 602. The transmission gear 602 rotates on one side of the gear seat 603 through the rotating shaft. The lower end of the gear seat 603 is connected to the upper surface of the base plate 1. The lower end of the drive belt 604 is sleeved on the rotating shaft on one side of the transmission gear 602.

[0052] The horizontal gear 601 transmits the rotational force of the transmission gear 602 to the transmission belt 5, enabling the transmission belt 5 to drive the rotating seat 401 to rotate. The transmission gear 602 transmits the rotational force of the drive belt 604 to drive the horizontal gear 601 to rotate. The drive belt 604 transmits the rotational force of the drive shaft 903 to the transmission gear 602.

[0053] Furthermore, the drive device 900 includes a support frame 901, a drive motor 902, and a drive shaft 903. The lower ends of the two support frames 901 are connected to the upper surface of the base plate 1, and the upper ends of the two support frames 901 are respectively connected to the two side surfaces of the drive motor 902. One end of the drive shaft 903 is connected to the output end of the drive motor 902, and the upper end of the drive belt 604 is sleeved on the drive shaft 903.

[0054] The support frame 901 is used to support the drive motor 902. The drive motor 902 is used to provide power to the device. While the drive motor 902 drives the drive shaft 903 to rotate, the drive shaft 903 drives the drive belt 604 to rotate.

[0055] Further, the reciprocating device 1000 includes a rotating disk 1001, an eccentric shaft 1002, a reciprocating rod 1003, an upper fixed frame 1004, and a lower fixed frame 1005. The center of one surface of the rotating disk 1001 is connected to one end of the drive shaft 903, and the eccentric shaft 1002 is provided on the edge of the other surface of the rotating disk 1001. The reciprocating rod 1003 has a strip-shaped through hole in the middle, and the eccentric shaft 1002 is located within the strip-shaped through hole in the middle of the reciprocating rod 1003. In the coordinated operation, one surface of the lower fixed frame 1005 is connected to one surface of the drive motor 902, one end of the upper fixed frame 1004 is disposed on one surface of the lower fixed frame 1005, and one end of the upper fixed frame 1004 is provided with a through hole. The upper part of the reciprocating rod 1003 slides back and forth in the through hole of the upper fixed frame 1004, and one end of the lower fixed frame 1005 is provided with a through hole. The lower part of the reciprocating rod 1003 slides back and forth in the through hole of the lower fixed frame 1005.

[0056] The rotating disk 1001 is used to connect the drive shaft 903 for rotation. The eccentric shaft 1002 is used to drive the reciprocating rod 1003 to move up and down through the rotation of the rotating disk 1001. The upper fixed frame 1004 is used to fix the track for the upper part of the reciprocating rod 1003. The lower fixed frame 1005 is used to fix the track for the lower part of the reciprocating rod 1003.

[0057] Furthermore, the lower end of the reciprocating rod 1003 is connected to the upper surface of the magnetic generator 11;

[0058] The magnetic generator 11 is located at the bottom end of the reciprocating rod 1003, so that the reciprocating rod 1003 can drive the magnetic generator 11 to continuously move up and down.

[0059] Furthermore, the clamping device 700 includes clamping rods 701, C-shaped slots 702, and fixing bolts 703. The lower surfaces of the four C-shaped slots 702 are respectively connected to the upper ends of the four clamping rods 701. The upper surfaces of the four C-shaped slots 702 are provided with threaded through holes. The four fixing bolts 703 are respectively adapted to the threaded through holes on the four C-shaped slots 702.

[0060] The clamping rod 701 is used to support the C-shaped slot 702. The C-shaped slot 702 is used to initially support the electromagnetic shielding plate 8 at both sides and corners. Then, by rotating the fixing bolt 703 from top to bottom, the two sides of the electromagnetic shielding plate 8 are firmly fixed in the C-shaped slot 702.

[0061] Furthermore, the base plate 1 is also provided with a movable wheel 102 and a universal wheel 101. The upper end of the universal wheel 101 is fixedly connected to the tip of the lower surface of the base plate 1, and the two movable wheels 102 are symmetrically arranged on the lower side of the base plate 1.

[0062] The function of the movable wheel 102 is to enable the device to move to a certain extent, and the function of the omnidirectional wheel 101 is to enable the device to turn during movement, thereby improving the flexibility of the device.

[0063] A method of using an electromagnetic shielding testing device includes the following steps:

[0064] S1: Install equipment:

[0065] S101: Place the two side edges of the electromagnetic shielding plate 8 into the four C-shaped slots 702;

[0066] S102: Rotate the four fixing bolts 703 set on the four C-shaped slots 702 so that the bottom ends of the four fixing bolts 703 press against the two sides of the electromagnetic shielding plate 8 to fix it.

[0067] S103: Align the threaded end of the drawing pen 302 with the threaded hole of the threaded seat 301, rotate the drawing pen 302 to push it inward, so that the drawing pen 302 is fixedly installed in the threaded seat 301;

[0068] S2: Equipment used:

[0069] S201: Activate the magnetic generator 11. The magnet 203 descends after being subjected to the magnetic force of the magnetic generator 11, and at the same time drives the drawing pen 302 to draw the falling trajectory on the drawing paper 404.

[0070] S202: Start the drive motor 902. The drive motor 902 drives the drive shaft 903 to rotate. The drive shaft 903 drives the rotating disk 1001 to rotate. While the eccentric shaft 1002 set on the rotating disk 1001 rotates, it drives the reciprocating rod 1003 to move up and down reciprocally on the fixed track of the upper fixed frame 1004 and the lower fixed frame 1005.

[0071] S203: When the drive shaft 903 drives the rotating disk 1001 to rotate, it will simultaneously drive the drive belt 604 to perform transmission. The drive belt 604 drives the transmission gear 602 to rotate. The transmission gear 602 drives the horizontal gear 601 to rotate. The horizontal gear 601 drives the rotating seat 401 to rotate through the transmission belt 5, so that the paper roll 402 drives the drawing paper 404 to roll. When the drawing pen 302 moves up and down reciprocally under the force of the magnetic generator 11, it can draw a magnetic force curve change diagram on the drawing paper 404.

[0072] S3: Data Analysis

[0073] S301: When the magnetic generator 11 moves up and down, the magnetic field applies force to the magnet 203 through the electromagnetic shielding plate 8. The magnet 203 drives the drawing pen 302 to move up and down to draw on the drawing paper 404. At the same time, the drawing paper 404 rolls in one direction, so that the drawing pen 302 draws a wave curve on the drawing paper 404. The change in the magnitude of the magnetic force transmitted by the magnetic generator 11 at different distances above the electromagnetic shielding plate 8 can be observed.

[0074] S302: Remove the electromagnetic shielding plate 8 and repeat the above steps. The drawing pen 302 can draw a wave curve on the drawing paper 404. When the magnetic force curve with the electromagnetic shielding plate 8 installed is compared with the magnetic force curve without the electromagnetic shielding plate 8 installed, the electromagnetic shielding capability of the electromagnetic shielding plate 8 can be determined.

[0075] In summary, in actual use, the electromagnetic shielding plate 8 is placed in the four C-shaped slots 702 on both sides, and the electromagnetic shielding plate 8 is fixed by rotating the fixing bolts 703. The drive motor 902 is started, which drives the drive shaft 903 to rotate. The drive shaft 903 drives the rotating disk 1001 to rotate. Simultaneously, the eccentric shaft 1002 on the rotating disk 1001 rotates, causing the reciprocating rod 1003 to move up and down reciprocally. The upper fixing frame 1004 fixes the track for the upper part of the reciprocating rod 1003, and the lower fixing frame 1005 fixes the track for the lower part of the reciprocating rod 1003. The drive shaft 903 drives the reciprocating device 1... When the device is in operation, the drive shaft 903 simultaneously drives the drive belt 604 for transmission. The drive belt 604 drives the transmission gear 602 to rotate. The transmission gear 602 drives the horizontal gear 601 to rotate. The horizontal gear 601 drives the rotating seat 401 to rotate through the transmission belt 5, causing the paper roll 402 to roll the drawing paper 404. When the drawing pen 302 moves up and down reciprocally under the force of the magnetic generating device 11, it draws a magnetic force curve change diagram on the drawing paper 404. When the electromagnetic shielding plate 8 is removed, the magnetic force curve change diagram changes. It is possible to observe the comparison of the magnetic force change before and after the electromagnetic shielding plate 8 is placed and removed, as well as the degree of magnetic force change at different positions.

[0076] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0077] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An electromagnetic shielding testing device, characterized in that: Includes a base plate (1), on which a magnetic induction device (200) is provided, and on which a drawing device (300) is provided, and on which the base plate (1) is also a scroll device (400), with a transmission belt (5) sleeved at the bottom end of the scroll device (400), and the other end of the transmission belt (5) sleeved on the transmission device (600), and on which the base plate (1) is also a clamping device (700), the clamping device (700) An electromagnetic shielding plate (8) is provided on the plate. The upper end of the transmission device (600) is sleeved on a part of the drive device (900). The bottom end of the drive device (900) is fixedly connected to the upper surface of the base plate (1). A reciprocating device (1000) is provided at the drive end of the drive device (900). A magnetic generator (11) is provided at the lower end of the reciprocating device (1000). The magnetic generator (11) is located on the upper side of the electromagnetic shielding plate (8). The magnetic induction device (200) includes a spring (201), a support platform (202), and a magnet (203). The lower end of the spring (201) is connected to the upper surface of the base plate (1), the upper end of the spring (201) is connected to the lower surface of the support platform (202), and the lower end of the magnet (203) is connected to the upper surface of the support platform (202). The drawing device (300) includes a threaded seat (301) and a drawing pen (302). One end of the drawing pen (302) is provided with a threaded outer ring. The threaded end of the drawing pen (302) is adapted to the threaded seat (301). The lower surface of the threaded seat (301) is connected to the upper surface of the support platform (202).

2. The electromagnetic shielding testing device according to claim 1, characterized in that: The roll assembly (400) includes a rotating seat (401), a paper roll (402), a pressure roller (403), and drawing paper (404). Two rotating seats (401) are mounted on a base plate (1). Two paper rolls (402) are respectively mounted at the center of the upper surface of the two rotating seats (401). The pressure roller (403) is mounted on the base plate (1) and rotates with one rotating seat (401). The drawing paper (404) has a roll-type structure and is mounted on one rotating seat (401). One end of the drawing paper (404) is connected to one surface of the other rotating seat (401). The two ends of the transmission belt (5) are respectively mounted on the two rotating seats (401). The drawing pen (302) is movablely engaged with the drawing paper (404).

3. The electromagnetic shielding testing device according to claim 2, characterized in that: The transmission device (600) includes a horizontal gear (601), a transmission gear (602), a gear seat (603), and a drive belt (604). The horizontal gear (601) has a cylindrical rotating protrusion under it. One end of the transmission belt (5) is sleeved on the protrusion under the horizontal gear (601). The horizontal gear (601) meshes with the transmission gear (602). A rotating shaft is provided on one side of the transmission gear (602). The transmission gear (602) rotates on one side of the gear seat (603) through the rotating shaft. The lower end of the gear seat (603) is connected to the upper surface of the base plate (1). The lower end of the drive belt (604) is sleeved on the rotating shaft on one side of the transmission gear (602).

4. The electromagnetic shielding testing device according to claim 3, characterized in that: The drive device (900) includes a support frame (901), a drive motor (902), and a drive shaft (903). The lower ends of the two support frames (901) are connected to the upper surface of the base plate (1), and the upper ends of the two support frames (901) are respectively connected to the two side surfaces of the drive motor (902). One end of the drive shaft (903) is connected to the output end of the drive motor (902), and the upper end of the drive belt (604) is sleeved on the drive shaft (903).

5. The electromagnetic shielding testing device according to claim 4, characterized in that: The reciprocating device (1000) includes a rotating disk (1001), an eccentric shaft (1002), a reciprocating rod (1003), an upper fixed frame (1004), and a lower fixed frame (1005). The center of one surface of the rotating disk (1001) is connected to one end of the drive shaft (903). The eccentric shaft (1002) is provided on the edge of the other surface of the rotating disk (1001). A strip-shaped through hole is provided in the middle of the reciprocating rod (1003), and the eccentric shaft (1002) is located in the strip-shaped through hole in the middle of the reciprocating rod (1003). In the coordinated operation, one surface of the lower fixed frame (1005) is connected to one surface of the drive motor (902), one end of the upper fixed frame (1004) is disposed on one surface of the lower fixed frame (1005), one end of the upper fixed frame (1004) is provided with a through hole, the upper part of the reciprocating rod (1003) slides back and forth in the through hole of the upper fixed frame (1004), one end of the lower fixed frame (1005) is provided with a through hole, and the lower part of the reciprocating rod (1003) slides back and forth in the through hole of the lower fixed frame (1005).

6. The electromagnetic shielding testing device according to claim 5, characterized in that: The lower end of the reciprocating rod (1003) is connected to the upper surface of the magnetic generator (11).

7. The electromagnetic shielding testing device according to claim 1, characterized in that: The clamping device (700) includes clamping rods (701), C-shaped slots (702), and fixing bolts (703). The lower surfaces of the four C-shaped slots (702) are respectively connected to the upper ends of the four clamping rods (701). The upper surfaces of the four C-shaped slots (702) are provided with threaded through holes. The four fixing bolts (703) are respectively adapted to the threaded through holes on the four C-shaped slots (702).

8. The electromagnetic shielding testing device according to claim 1, characterized in that: The base plate (1) is also provided with a movable wheel (102) and a universal wheel (101). The upper end of the universal wheel (101) is fixedly connected to the tip of the lower surface of the base plate (1). The two movable wheels (102) are symmetrically arranged on the lower side of the base plate (1).

9. A method of using an electromagnetic shielding testing device, characterized in that: Includes the following steps: S1: Install equipment: S101: Place the two sides of the electromagnetic shielding plate (8) into the four C-shaped slots (702); S102: Rotate the four fixing bolts (703) set on the four C-shaped slots (702) so that the bottom ends of the four fixing bolts (703) press against the two sides of the electromagnetic shielding plate (8) to fix it. S103: Align the threaded end of the drawing pen (302) with the threaded hole of the threaded seat (301), rotate the drawing pen (302) to push it inward, so that the drawing pen (302) is fixedly installed in the threaded seat (301); S2: Equipment used: S201: Start the magnetic generator (11). The magnet (203) descends after being subjected to the magnetic force of the magnetic generator (11), and at the same time drives the drawing pen (302) to draw the falling trajectory on the drawing paper (404). S202: Start the drive motor (902), the drive motor (902) drives the drive shaft (903) to rotate, the drive shaft (903) drives the rotating disk (1001) to rotate, and the eccentric shaft (1002) set on the rotating disk (1001) rotates at the same time, driving the reciprocating rod (1003) to move up and down reciprocally on the fixed track of the upper fixed frame (1004) and the lower fixed frame (1005); S203: When the drive shaft (903) drives the rotating disk (1001) to rotate, it will simultaneously drive the drive belt (604) to perform transmission. The drive belt (604) drives the transmission gear (602) to rotate. The transmission gear (602) drives the horizontal gear (601) to rotate. The horizontal gear (601) drives the rotating seat (401) to rotate through the transmission belt (5), so that the paper roll (402) drives the drawing paper (404) to roll. When the drawing pen (302) moves up and down reciprocally under the force of the magnetic generator (11), it can draw a magnetic force curve change diagram on the drawing paper (404). S3: Data Analysis S301: When the magnetic generator (11) moves up and down, the magnetic field applies force to the magnet (203) through the electromagnetic shielding plate (8). The magnet (203) drives the drawing pen (302) to move up and down to draw on the drawing paper (404). At the same time, the drawing paper (404) rolls in one direction, so that the drawing pen (302) draws a wave curve on the drawing paper (404). The change in the magnitude of the magnetic force transmitted by the magnetic generator (11) at different distances above the electromagnetic shielding plate (8) can be observed. S302: Remove the electromagnetic shielding plate (8) and repeat the above steps again. The drawing pen (302) can draw a wave curve on the drawing paper (404). When the magnetic force curve with the electromagnetic shielding plate (8) installed is compared with the magnetic force curve without the electromagnetic shielding plate (8) installed, the electromagnetic shielding capability of the electromagnetic shielding plate (8) can be known.

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