LED screen detection device and method

Abstract

The invention discloses an LED screen detection device and method, and belongs to the field of LED screen detection. An LED screen detection device comprises a detection table, a mounting bin is formed in the detection table, a containing table is fixedly connected in the mounting bin, four sets of positioning suction cups are symmetrically arranged at the top of the containing table, the LED screen detection device further comprises a vibration assembly and an impact assembly, the vibration assembly is arranged in the mounting bin and used for generating a vibration effect on the containing table, and the impact assembly is used for impacting the containing table. The impact assembly is arranged on the detection table and is used for generating an airflow impact effect on the LED screen; the vibration environment of the LED screen in the transportation process is simulated through the vibration effect generated when the knocking plate continuously knocks the containing table, the LED screen in the vibration process is comprehensively detected through the detection probe in cooperation with reciprocating sliding of the air guide plate, the display quality condition of the LED screen in the vibration environment after being powered on is obtained, comprehensive detection of the anti-seismic performance of the LED screen is achieved, and the detection efficiency of the LED screen is improved. And the detection efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of LED screen detection technology, and in particular to an LED screen detection device and method. Background Art

[0002] LED screens are a new type of electronic imaging device made from sequentially arranged light-emitting diodes. Due to their high brightness, wide viewing angles, and long lifespan, they are widely used in products such as outdoor advertising screens. After LED screen production is complete, quality inspection is necessary to ensure final quality.

[0003] At present, when inspecting LED screens, the display effects of the LED screens are mainly inspected by staff using detection probes, which has low inspection efficiency. In addition, during the transportation and use of the LED screens, they are subject to vibration and impact. The existing inspection devices are difficult to simulate a relatively real inspection environment, resulting in reduced inspection effect and difficulty in obtaining the true quality of the LED screens. Therefore, an LED screen inspection device and method are proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of low detection efficiency in the existing technology and the difficulty of existing detection devices in simulating a relatively real detection environment, resulting in reduced detection effect, and to propose an LED screen detection device and method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An LED screen detection device includes a detection table, an installation compartment is provided in the detection table, a placing table is fixedly connected to the installation compartment, four groups of positioning suction cups are symmetrically arranged on the top of the placing table, and the device also includes: a vibration component, the vibration component is arranged in the installation compartment, the vibration component is used to generate a vibration effect on the placing table to achieve anti-vibration detection of the LED screen; and an impact component, the impact component is arranged on the detection table, the impact component is used to generate an airflow impact effect on the LED screen to achieve anti-impact detection of the LED screen.

[0007] In order to improve the detection effect, preferably, the vibration assembly includes a positioning rod, the top of the positioning rod is rotatably connected to a linkage disk, the outer wall of the linkage disk is fixedly connected to a rotating disk, and the central axes of the positioning rod, the rotating disk and the installation bin coincide, the bottom of the inner cavity of the installation bin is fixedly connected to a driving motor, the top of the output shaft of the driving motor is fixedly connected to a driving gear, the inner wall of the rotating disk is fixedly connected to a driven gear disk, the driven gear disk is meshed with the driving gear, and knocking parts are arranged at equal intervals on the outer wall of the rotating disk.

[0008] Furthermore, the knocking part includes a knocking plate, which is rotatably connected to the outer wall of the rotating disk. A first spring is fixedly connected between the knocking plate and the rotating disk. When the knocking plate is naturally unfolded, the distance from the outermost end to the outer wall of the rotating disk is greater than the distance from the placing table connecting column to the outer wall of the rotating disk.

[0009] In order to improve the detection effect, preferably, the impact assembly includes an air guide plate, a reciprocating slide groove is provided on the detection table, a reciprocating screw rod is rotatably connected in the reciprocating slide groove, the air guide plate is threadedly sleeved on the reciprocating screw rod, and the outer wall of the air guide plate fits the inner wall of the reciprocating slide groove, impact holes are provided at equal intervals on the bottom of the air guide plate, and detection probes are fixedly connected on both sides of the bottom of the air guide plate, and a pressure storage part for introducing high-pressure gas into the inner cavity of the air guide plate is provided in the installation chamber.

[0010] Furthermore, a linkage shaft is rotatably connected to the side wall of the detection table, the top of the linkage shaft is connected to the end of the reciprocating screw through a bevel gear set, and the bottom of the linkage shaft is connected to the output shaft of the drive motor through a pulley set.

[0011] Furthermore, the pressure storage part includes a pressure storage bin, which is opened in the testing platform, and a movable plate is slidably connected in the pressure storage bin, and a second spring is fixedly connected between the bottom of the movable plate and the bottom of the inner cavity of the pressure storage bin, and the bottom of the reciprocating slide groove close to the air guide plate is fixed and connected to the air guide pipe, and the other end of the air guide pipe is connected to the upper part of the inner cavity of the pressure storage bin, and a sealing groove is opened in the testing platform, and the sealing groove is connected to the air guide pipe, and the bottom of the inner cavity of the sealing groove is fixedly connected to an electric push rod, and the top of the telescopic end of the electric push rod is fixedly connected to a sealing plate, and the inner wall of the pressure storage bin is located at the upper and lower parts of the movable plate, and the two groups of contact plates are electrically connected to the electric push rod, and an inflation part for storing air in the pressure storage bin is provided in the installation bin.

[0012] Furthermore, the inflation part includes a piston box, which is fixed on the inner wall of the installation bin, and a piston plate is slidably connected to the piston box. The side wall of the piston plate is rotatably connected to a push-pull rod, and the other end of the push-pull rod is rotatably connected to the top of the linkage disk. Both sides of the piston box are fixed and connected with an inflation tube, the other end of the inflation tube is connected to the inner cavity of the pressure storage bin, and a one-way valve is provided in the inflation tube.

[0013] In order to improve the stability of the LED screen during detection, preferably, the bottom of the inner cavity of the four groups of positioning suction cups are connected through a negative pressure tube, and an exhaust pipe is fixedly connected to the top of the piston box. The other end of the exhaust pipe is connected to the negative pressure pipe, and an electromagnetic valve and a one-way valve are provided in the exhaust pipe.

[0014] In order to facilitate the heat dissipation of the inner cavity of the installation chamber, preferably, the bottom of the piston box is fixed and connected to an air supply pipe, the air supply pipe is connected to the inner cavity of the installation chamber, and a solenoid valve and a one-way valve are provided in the air supply pipe, and heat dissipation grooves are opened on both sides of the detection table, and the heat dissipation grooves are connected to the inner cavity of the installation chamber.

[0015] Compared with the prior art, the present invention provides an LED screen detection device and method, which has the following beneficial effects:

[0016] 1. The LED screen detection device simulates the vibration environment that the LED screen is subjected to during transportation by continuously hitting the placing table with a knocking plate. In conjunction with the reciprocating sliding of the air guide plate, the detection probe is used to conduct a comprehensive detection of the vibrating LED screen, and the display quality of the LED screen after power-on in the vibration environment is obtained, thereby achieving a comprehensive detection of the seismic performance of the LED screen and effectively improving the detection efficiency.

[0017] 2. The LED screen detection device accumulates high-pressure gas in the pressure storage chamber through the reciprocating sliding of the piston plate in the piston box. When the movable plate is subjected to the air pressure and fits with the contact plate below, it impacts the surface of the LED screen through the impact hole, thereby simulating a more realistic transportation environment and realizing the impact resistance test of the LED screen. In addition, with the reciprocating sliding of the air guide plate, air pressure impacts are continuously applied to different areas of the LED screen, which effectively improves the detection effect and makes the detection results more representative.

[0018] 3. The LED screen detection device uses the suction effect generated by the piston plate sliding in the piston box to allow the gas in the positioning suction cup to enter the piston box along the negative pressure tube and the exhaust tube, so that suction is generated in the positioning suction cup, thereby achieving adsorption and fixation of the LED screen, ensuring stability during the LED screen detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an LED screen detection device proposed by the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the overall structure of an LED screen detection device proposed by the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the internal structure of the installation chamber of the LED screen detection device proposed by the present invention;

[0022] Figure 4 This is a side view half-section structural diagram of an LED screen detection device proposed by the present invention;

[0023] Figure 5A LED screen detection device proposed by the present invention Figure 4 Schematic diagram of the enlarged structure of area A in the middle;

[0024] Figure 6 A LED screen detection device proposed by the present invention Figure 4 Schematic diagram of the enlarged structure of the middle B area;

[0025] Figure 7 This is a schematic diagram of the transverse cross-sectional structure of an LED screen detection device proposed by the present invention;

[0026] Figure 8 This is a schematic diagram of the bottom structure of a holding platform of an LED screen detection device proposed in the present invention.

[0027] In the figure: 1. Testing table; 2. Mounting bin; 21. Holding table; 22. Positioning suction cup; 221. Negative pressure pipe; 23. Heat dissipation groove; 3. Positioning rod; 31. Linkage disk; 32. Rotating disk; 33. Driving motor; 34. Driving gear; 35. Driven gear disk; 36. Knocking plate; 37. First spring; 4. Air guide plate; 41. Reciprocating slide; 42. Reciprocating screw rod; 43. Impact hole; 44. Testing probe; 45. Pressure storage bin; 451. Moving plate; 452. Second spring; 453. Air guide pipe; 46. Sealing groove; 461. Electric push rod; 462. Sealing plate; 463. Contact plate; 5. Linkage shaft; 51. Bevel gear set; 52. Pulley set; 6. Piston box; 61. Piston plate; 62. Push-pull rod; 63. Inflating pipe; 64. Exhaust pipe; 65. Air supply pipe. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0030] Example 1:

[0031] Reference Figures 1-8, a LED screen detection device, a detection table 1, an installation compartment 2 is opened in the detection table 1, a placing table 21 is fixedly connected to the installation compartment 2, four groups of positioning suction cups 22 are symmetrically arranged on the top of the placing table 21, and also includes: a vibration component, the vibration component is arranged in the installation compartment 2, the vibration component is used to generate a vibration effect on the placing table 21, so as to realize the vibration resistance detection of the LED screen; the impact component is arranged on the detection table 1, and the impact component is used to generate an airflow impact effect on the LED screen, so as to realize the impact resistance detection of the LED screen.

[0032] Reference Figure 3 、 Figure 4 and Figure 7 The cam 32 is fixedly connected to the outer wall of the cam 32, and the central axis of the cam 32, the cam 32 and the mounting chamber 2 coincide with each other. The bottom of the inner cavity of the mounting chamber 2 is fixedly connected to a driving motor 33, and the top of the output shaft of the driving motor 33 is fixedly connected to a driving gear 34. The inner wall of the rotating disk 32 is fixedly connected to a driven gear plate 35, and the driven gear plate 35 is meshed with the driving gear 34. A knocking part is provided at equal intervals on the outer wall of the rotating disk 32; the knocking part includes a knocking plate 36, which is rotatably connected to the outer wall of the rotating disk 32, and a first spring 37 is fixedly connected between the knocking plate 36 and the rotating disk 32. When the knocking plate 36 is naturally expanded, the distance from the outermost end to the outer wall of the rotating disk 32 is greater than the connecting column of the holding platform 21 The distance to the outer wall of the rotating disk 32; the impact assembly includes an air guide plate 4, a reciprocating slide groove 41 is provided on the detection platform 1, and a reciprocating screw rod 42 is rotatably connected in the reciprocating slide groove 41, the air guide plate 4 is threadedly sleeved on the reciprocating screw rod 42, and the outer wall of the air guide plate 4 is fitted with the inner wall of the reciprocating slide groove 41, and the bottom of the air guide plate 4 is provided with impact holes 43 at equal intervals. Both sides of the bottom of the air guide plate 4 are fixedly connected with detection probes 44, and the detection probes 44 adopt existing mature technology. The specific principle is not repeated here. A pressure storage part for introducing high-pressure gas into the inner cavity of the air guide plate 4 is provided in the installation chamber 2; a linkage shaft 5 is rotatably connected to the side wall of the detection platform 1, and the top of the linkage shaft 5 and the end of the reciprocating screw rod 42 are connected by a bevel gear set 51, and the bottom of the linkage shaft 5 and the output shaft of the drive motor 33 are connected by a pulley set 52;

[0033] Through the setting of the above structure, the driving motor 33 is turned on, and the meshing relationship between the driven gear plate 35 and the driving gear 34 is utilized to make the linkage disk 31 and the rotating disk 32 rotate around the positioning rod 3. During this process, the knocking plate 36 will continuously hit the connecting column of the placing table 21. Cooperating with the setting of the first spring 37, the placing table 21 as a whole will vibrate, thereby simulating the vibration environment that the LED screen is subjected to during transportation. While the output end of the driving motor 33 rotates, the transmission action of the pulley group 52 and the bevel gear group 51 will drive the reciprocating screw 42 to rotate, so that the air guide plate 4 slides back and forth along the reciprocating screw 42. At this time, the detection probe 44 will detect the vibrating LED screen to obtain the display quality of the LED screen after power-on in the vibration environment, thereby realizing a comprehensive detection of the seismic resistance of the LED screen and improving the detection efficiency.

[0034] Reference Figure 4-Figure 8 , wherein the pressure storage part includes a pressure storage bin 45, the pressure storage bin 45 is opened in the test bench 1, and a movable plate 451 is slidably connected in the pressure storage bin 45, and a second spring 452 is fixedly connected between the bottom of the movable plate 451 and the bottom of the inner cavity of the pressure storage bin 45, and the bottom of the reciprocating slide 41 close to the air guide plate 4 is fixed and connected to the air guide pipe 453, and the other end of the air guide pipe 453 is connected to the upper part of the inner cavity of the pressure storage bin 45, and a blocking groove 46 is opened in the test bench 1, and the blocking groove 46 is connected to the air guide pipe 453, and the bottom of the inner cavity of the blocking groove 46 is fixedly connected to an electric push rod 461, and the top of the telescopic end of the electric push rod 461 is fixedly connected to a blocking plate 462, and the pressure storage bin 4 Contact plates 463 are fixedly connected to the upper and lower parts of the inner wall of the movable plate 451. Both sets of contact plates 463 are electrically connected to the electric push rod 461. An inflation unit for storing air in the pressure storage chamber 45 is provided in the installation chamber 2. The inflation unit includes a piston box 6, which is fixed to the inner wall of the installation chamber 2. A piston plate 61 is slidably connected to the piston box 6. A push-pull rod 62 is rotatably connected to the side wall of the piston plate 61. The other end of the push-pull rod 62 is rotatably connected to the top of the linkage disk 31. An inflation tube 63 is fixed and connected to both sides of the piston box 6. The other end of the inflation tube 63 is connected to the inner cavity of the pressure storage chamber 45, and a one-way valve is provided in the inflation tube 63.

[0035] It should be noted that the one-way valve in the inflation tube 63 can only allow the gas in the piston box 6 to enter the pressure storage chamber 45; in addition, the upper contact plate 463 is used to control the extension of the electric push rod 461 to achieve the blocking of the blocking groove 46; and the lower contact plate 463 is used to control the retraction of the electric push rod 461 to release the blockage of the blocking groove 46.

[0036] By setting the above structure, when the linkage disk 31 rotates, the push-pull rod 62 will push and pull the piston plate 61 back and forth in the piston box 6. When the piston plate 61 slides into the piston box 6, the gas in the piston box 6 will be compressed and the one-way valve in the inflation tube 63 will be opened, so that the gas will be filled into the pressure storage bin 45 along the inflation tube 63. Under the action of the air pressure, the movable plate 451 will be pushed to slide toward the side of the compressed second spring 452. When the movable plate 451 slides to the position in contact with the lower contact plate 463, a retraction command will be transmitted to the electric push rod 461, so that the electric push rod 461 moves downward with the blocking plate 462, thereby releasing the blocking groove. 46 is blocked. At this time, the high-pressure gas in the pressure storage bin 45 will quickly enter the air guide plate 4 along the air guide pipe 453, and finally impact the surface of the LED screen through the impact hole 43. When the movable plate 451 slides to the position in contact with the upper contact plate 463 under the rebound action of the second spring 452, it will transmit an extension instruction to the electric push rod 461, thereby blocking the blocking groove 46 again. This reciprocating process can continuously perform air pressure shocks on different areas of the LED screen under a vibration environment, thereby simulating a more realistic transportation environment, realizing impact resistance detection of the LED screen, effectively improving the detection effect, and making the detection results more representative.

[0037] Reference Figure 3 、 Figure 4 and Figure 8 Among them, the bottom of the inner cavity of the four groups of positioning suction cups 22 are connected through a negative pressure pipe 221, and an exhaust pipe 64 is fixedly connected to the top of the piston box 6. The other end of the exhaust pipe 64 is connected to the negative pressure pipe 221. A solenoid valve and a one-way valve are provided in the exhaust pipe 64. A pressure relief pipe is fixed on the exhaust pipe 64 and connected, and a solenoid valve is provided in the pressure relief pipe.

[0038] It should be noted that the one-way valve in the exhaust pipe 64 can only allow the gas in the positioning suction cup 22 to enter the piston box 6; and the solenoid valve in the pressure relief pipe is used to release the negative pressure in the positioning suction cup 22 after the detection is completed to achieve material removal.

[0039] Through the setting of the above structure, at the initial stage of detection, the solenoid valve in the air supply pipe 65 is closed, and the solenoid valve in the air extraction pipe 64 is opened. While the linkage disk 31 rotates, the push-pull rod 62 will push and pull the piston plate 61 back and forth in the piston box 6. At this time, when the piston plate 61 slides into the piston box 6, the gas in the piston box 6 will be compressed, and the one-way valve in the inflation pipe 63 will be opened, so that the gas is filled into the pressure storage bin 45 along the inflation pipe 63. When the piston plate 61 moves in the opposite direction, suction will be generated in the piston box 6, and the one-way valve in the air extraction pipe 64 will be opened, so that the gas in the positioning suction cup 22 will enter the piston box 6 along the negative pressure pipe 221 and the air extraction pipe 64, and so on and so forth, thereby realizing the adsorption and fixation of the LED screen, and ensuring the stability of the LED screen during the detection process.

[0040] Reference Figure 4 、 Figure 5 Among them, the bottom of the piston box 6 is fixed and connected to the air supply pipe 65, the air supply pipe 65 is connected to the inner cavity of the installation chamber 2, and a solenoid valve and a one-way valve are provided in the air supply pipe 65. Heat dissipation grooves 23 are opened on both sides of the detection platform 1, and the heat dissipation grooves 23 are connected to the inner cavity of the installation chamber 2.

[0041] It should be noted that the one-way valve in the air supply pipe 65 can only allow the gas in the testing platform 1 to enter the piston box 6 .

[0042] Through the setting of the above structure, the solenoid valve in the air supply pipe 65 is opened and the solenoid valve in the air exhaust pipe 64 is closed. The suction force in the piston box 6 will continuously fill the piston box 6 along the air supply pipe 65, and make the gas in the installation chamber 2 flow quickly, thereby realizing rapid heat dissipation inside the installation chamber 2 and improving the service life of the equipment inside the installation chamber 2.

[0043] Example 2:

[0044] Reference Figures 1-8 , which is basically the same as the first embodiment. On the basis of the first embodiment, a LED screen detection method is proposed, and the steps are as follows:

[0045] Step 1: Place the LED screen on the holding platform 21 and turn on the power;

[0046] Step 2: Apply vibration to the LED screen to test its anti-vibration performance;

[0047] Step 3: Apply airflow impact to the LED screen to test the impact resistance of the LED screen;

[0048] Step 4: While carrying out steps 2 and 3, the LED screen is adsorbed and fixed.

[0049] Reference Figures 1-8In the present invention, when in use, first place the LED screen to be tested on the placing table 21, and turn on the power, then turn on the drive motor 33, and use the meshing relationship between the driven gear plate 35 and the driving gear 34 to make the linkage disk 31 and the rotating disk 32 rotate around the positioning rod 3. In this process, the knocking plate 36 will continuously hit the connecting column of the placing table 21, and cooperate with the setting of the first spring 37 to make the placing table 21 as a whole vibrate, thereby simulating the vibration environment that the LED screen is subjected to during transportation. While the output end of the drive motor 33 rotates, the transmission action of the pulley group 52 and the bevel gear group 51 will drive the reciprocating screw 42 to rotate, so that the air guide plate 4 slides back and forth along the reciprocating screw 42. At this time, the detection probe 44 will detect the vibrating LED screen to obtain the display quality of the LED screen after power is turned on in the vibration environment, thereby realizing the detection of the seismic performance of the LED screen.

[0050] When the linkage disk 31 rotates, the push-pull rod 62 pushes and pulls the piston plate 61 back and forth in the piston box 6. At the initial stage of the test, the solenoid valve in the air supply pipe 65 is closed and the solenoid valve in the air extraction pipe 64 is opened. At this time, when the piston plate 61 slides into the piston box 6, the gas in the piston box 6 is compressed and the one-way valve in the air charging pipe 63 is opened, so that the gas is filled into the pressure storage bin 45 along the air charging pipe 63. When the piston plate 61 moves in the opposite direction, suction is generated in the piston box 6 and the one-way valve in the air extraction pipe 64 is opened. The one-way valve allows the gas in the positioning suction cup 22 to enter the piston box 6 along the negative pressure pipe 221 and the exhaust pipe 64, and so on, to achieve the adsorption and fixation of the LED screen, ensuring the stability of the LED screen during the detection process; then the solenoid valve in the air supply pipe 65 is opened, and the solenoid valve in the exhaust pipe 64 is closed. At this time, the suction force will continuously fill the piston box 6 along the air supply pipe 65, and make the gas in the installation chamber 2 flow quickly, so as to achieve rapid heat dissipation inside the installation chamber 2 and improve the use of the equipment inside the installation chamber 2. In addition, when the gas is continuously charged into the pressure storage bin 45 from the piston box 6, the gas pressure will push the movable plate 451 to slide toward the side of the compressed second spring 452. When the movable plate 451 slides to the position where it contacts the lower contact plate 463, it will transmit a retraction command to the electric push rod 461, so that the electric push rod 461 moves downward with the blocking plate 462, thereby releasing the blockage of the blocking groove 46. At this time, the high-pressure gas in the pressure storage bin 45 will quickly enter the gas guide plate 4 along the gas guide pipe 453, and finally be The punching hole 43 impacts the surface of the LED screen, and when the movable plate 451 slides to the position in contact with the upper contact plate 463 under the rebound action of the second spring 452, it transmits an extension instruction to the electric push rod 461, thereby blocking the blocking groove 46 again, and so on. In a vibration environment, air pressure shocks can be continuously applied to different areas of the LED screen, thereby simulating a more realistic transportation environment, realizing impact resistance testing of the LED screen, effectively improving the detection effect, and making the detection results more representative.

[0051] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An LED screen detection device, comprising a detection table (1), characterized in that: The testing platform (1) is provided with an installation chamber (2), a holding platform (21) is fixedly connected to the installation chamber (2), four groups of positioning suction cups (22) are symmetrically arranged on the top of the holding platform (21), and further comprises: A vibration component, the vibration component being arranged in the installation compartment (2), and being used to generate a vibration effect on the holding table (21) to achieve anti-vibration detection of the LED screen; An impact component is provided on a testing platform (1), and is used to generate an airflow impact on the LED screen, thereby realizing an anti-impact test of the LED screen.

2. The LED screen detection device according to claim 1, characterized in that: The vibration assembly comprises a positioning rod (3), the top of the positioning rod (3) is rotatably connected to a linkage disk (31), the outer wall of the linkage disk (31) is fixedly connected to a rotating disk (32), and the central axes of the positioning rod (3), the rotating disk (32) and the installation chamber (2) coincide with each other. The bottom of the inner cavity of the installation chamber (2) is fixedly connected to a driving motor (33), the top end of the output shaft of the driving motor (33) is fixedly connected to a driving gear (34), the inner wall of the rotating disk (32) is fixedly connected to a driven toothed disk (35), the driven toothed disk (35) and the driving gear (34) are meshed and connected, and knocking parts are arranged at equal intervals on the outer wall of the rotating disk (32).

3. The LED screen detection device according to claim 1, characterized in that: The knocking portion comprises a knocking plate (36), the knocking plate (36) being rotatably connected to the outer wall of the rotating disk (32), a first spring (37) being fixedly connected between the knocking plate (36) and the rotating disk (32), and a distance from the outermost end of the knocking plate (36) to the outer wall of the rotating disk (32) when the knocking plate (36) is naturally unfolded being greater than a distance from a connecting column of the placing platform (21) to the outer wall of the rotating disk (32).

4. The LED screen detection device according to claim 2, characterized in that: The impact assembly includes an air guide plate (4), a reciprocating slide groove (41) is provided on the detection table (1), a reciprocating screw rod (42) is rotatably connected in the reciprocating slide groove (41), the air guide plate (4) is threadedly sleeved on the reciprocating screw rod (42), and the outer wall of the air guide plate (4) is in contact with the inner wall of the reciprocating slide groove (41), the bottom of the air guide plate (4) is provided with impact holes (43) at equal intervals, and both sides of the bottom of the air guide plate (4) are fixedly connected with detection probes (44), and a pressure storage part for introducing high-pressure gas into the inner cavity of the air guide plate (4) is provided in the installation chamber (2).

5. The LED screen detection device according to claim 4, characterized in that: A linkage shaft (5) is rotatably connected to the side wall of the detection platform (1); the top end of the linkage shaft (5) is connected to the end of the reciprocating screw (42) via a bevel gear set (51); and the bottom end of the linkage shaft (5) is connected to the output shaft of the drive motor (33) via a pulley set (52).

6. The LED screen detection device according to claim 4, characterized in that: The pressure storage part includes a pressure storage bin (45), the pressure storage bin (45) is opened in the detection table (1), a movable plate (451) is slidably connected in the pressure storage bin (45), a second spring (452) is fixedly connected between the bottom of the movable plate (451) and the bottom of the inner cavity of the pressure storage bin (45), the bottom of the reciprocating slide groove (41) close to the air guide plate (4) is fixed and connected to the air guide pipe (453), the other end of the air guide pipe (453) is connected to the upper part of the inner cavity of the pressure storage bin (45), and a blocking groove (46) is opened in the detection table (1). ), the blocking groove (46) is connected to the air guide tube (453), the bottom of the inner cavity of the blocking groove (46) is fixedly connected to an electric push rod (461), the top of the telescopic end of the electric push rod (461) is fixedly connected to a blocking plate (462), the inner wall of the pressure storage bin (45) is located at the upper and lower parts of the movable plate (451) and is fixedly connected to contact plates (463), the two groups of contact plates (463) are electrically connected to the electric push rod (461), and the installation bin (2) is provided with an inflation portion for storing air in the pressure storage bin (45).

7. The LED screen detection device according to claim 6, characterized in that: The inflation part includes a piston box (6), which is fixed on the inner wall of the installation chamber (2). A piston plate (61) is slidably connected in the piston box (6), and a push-pull rod (62) is rotatably connected to the side wall of the piston plate (61). The other end of the push-pull rod (62) is rotatably connected to the top of the linkage disk (31). Both sides of the piston box (6) are fixed and connected with an inflation pipe (63). The other end of the inflation pipe (63) is connected to the inner cavity of the pressure storage chamber (45), and a one-way valve is provided in the inflation pipe (63).

8. The LED screen detection device according to claim 7, characterized in that: The bottom of the inner cavity of the four groups of positioning suction cups (22) are connected through a negative pressure tube (221), and the top of the piston box (6) is fixedly connected with an exhaust pipe (64), the other end of the exhaust pipe (64) is connected to the negative pressure tube (221), and a solenoid valve and a one-way valve are provided in the exhaust pipe (64).

9. The LED screen detection device according to claim 8, characterized in that: The bottom of the piston box (6) is fixed and connected to an air supply pipe (65), the air supply pipe (65) is connected to the inner cavity of the installation chamber (2), and a solenoid valve and a one-way valve are provided in the air supply pipe (65). Heat dissipation grooves (23) are provided on both sides of the detection platform (1), and the heat dissipation grooves (23) are connected to the inner cavity of the installation chamber (2).

10. A method for detecting an LED screen, using an LED screen detection device according to any one of claims 1 to 9, characterized in that: Here are the steps: Step 1: Place the LED screen on the placing table (21) and connect it to the power supply; Step 2: Apply vibration to the LED screen to test its anti-vibration performance; Step 3: Apply airflow impact to the LED screen to test the impact resistance of the LED screen; Step 4: While carrying out steps 2 and 3, the LED screen is adsorbed and fixed.

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