LED display screen fault detection device

Abstract

The invention discloses an LED display screen fault detection device, and relates to the technical field of LED display screen detection, and the device comprises a simulation box which is used for simulating an environment, a feeding assembly which is arranged in the middle of the simulation box and is used for facilitating the feeding and discharging of an LED display screen, a temperature simulation assembly which is arranged on the two sides of the simulation box, and a rainwater simulation assembly which is arranged in the middle of the simulation box and is used for facilitating the feeding and discharging of the LED display screen, a high-temperature environment or a low-temperature environment or a high-low temperature circulation environment is created in the simulation box through the temperature simulation assembly, a rainwater environment is created in the simulation box through the rainwater simulation assembly, and the high-temperature environment, the low-temperature environment, the high-low temperature circulation environment and the rainwater environment can be freely combined for use; the use state of the LED display screen in different combination environments is detected by detecting the use state of the LED display screen in different combination environments, the defects of the LED display screen in which environment are judged according to the detection result, and the LED display screen is improved and optimized towards the direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LED display screen detection, in particular to an LED display screen fault detection device. BACKGROUND

[0002] An LED display screen is a flat panel display composed of lamp points with certain spacing and specifications, each of which is composed of a single LED light-emitting tube. It uses light-emitting diodes as display elements to display various information such as text, graphics, images, etc. It has the advantages of excellent display effect, adaptability to multiple scenarios, strong durability, adaptability to complex environments, low energy consumption, controllable operating cost, flexible function, and adaptation to various application requirements. It is widely used in many fields such as business, public services, cultural entertainment, and industry, such as mobile phones, game consoles, watches, smart door lock screens, outdoor display screens, etc.

[0003] Due to the extremely wide application scenarios of LED display screens (from small indoor screens to large outdoor screens, from normal temperature and dry environments to extreme environments with high temperature and humidity, severe cold, and scorching sun), they will be tested in various environmental factors such as temperature and humidity in actual use. Therefore, during the production and development of LED display screens, these complex environments need to be simulated by manual simulation to expose defects in product design, materials, or processes in advance, so as to facilitate workers to optimize and improve the LED display screen in that direction. For example, the LED display screen fault detection device and its use method disclosed in the patent document with publication number CN118155525B, but the device has a single function and can only simulate the status of the LED display screen in a high-temperature environment. It cannot simulate a combination of multiple different environments. Therefore, an LED display screen fault detection device is proposed. SUMMARY

[0004] The purpose of the present application is to provide an LED display screen fault detection device to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] An LED display screen fault detection device, comprising:

[0007] A simulation box for simulating an environment;

[0008] A feeding assembly arranged in the middle of the simulation box for facilitating the feeding and discharging of the LED display screen, the feeding assembly being provided with a clamping assembly, the clamping assembly being arranged to be automatically clamped when the LED display screen enters the simulation box and automatically released when the LED display screen leaves the simulation box;

[0009] Temperature simulation assembly, arranged on both sides of the simulation box, used to create high-temperature environment or low-temperature environment or high-low temperature cycle environment in the simulation box;

[0010] Rainwater simulation assembly, arranged around the feeding assembly, used to create rainwater environment in the simulation box, the rainwater simulation assembly is provided with an adjusting assembly, which is arranged to control the reciprocating change of the water spraying direction when the rainwater simulation assembly works.

[0011] As a further preferred embodiment of the present application, the bottom of the simulation box is provided with a base, and the top end of the simulation box is provided with a sealing cover, the edge of which is fixedly connected with the simulation box by screws, and a high-definition camera is fixedly installed on the upper end of the sealing cover, the lens of which is located inside the simulation box, and a discharging port is formed in the front end side wall of the simulation box, which is used for the feeding and discharging of the LED display screen.

[0012] As a further preferred embodiment of the present application, the feeding assembly comprises:

[0013] A discharging plate, which is located inside the simulation box, the front end of which slides through the discharging port, and the discharging plate is arranged in matching with the discharging port, a through slot is formed in the middle part of the discharging plate, and a placing groove is formed in the upper end edge of the through slot, which is used for accommodating the LED display screen, and the through slot can ensure that the bottom of the LED display screen is not blocked.

[0014] Two first air cylinders, which are symmetrically distributed on both sides of the simulation box, and the two first air cylinders are fixedly connected with the outer wall of the simulation box.

[0015] A connecting plate, which is T-shaped, is located on the front side of the discharging plate, the extension rods of the two first air cylinders are fixedly connected at both ends of the connecting plate, and the other end of the connecting plate is fixedly connected with the front end of the discharging plate through a connecting rod.

[0016] As a further preferred embodiment of the present application, the clamping assembly comprises:

[0017] A pressing plate, a positioning groove is formed in the edge position of the upper surface of the discharging plate, the pressing plate is arranged in the positioning groove, the length, width and height of the pressing plate are the same as those of the positioning groove, an inclined surface is formed on the upper surface of the rear end of the pressing plate, and an adaptive groove is formed in the middle part of the pressing plate, the length and width of the adaptive groove are equal to the length and width of the through slot.

[0018] Four guide plates, the guide plate is L-shaped structure, four the guide plate is rectangular distribution and forms a guide area, the guide area is aligned with the discharge port, can guide the discharge plate, both ends of the guide plate are fixedly connected on the front and rear inner walls of the simulation box, the horizontal plate of the guide plate on the upside needs to meet the size requirement that it can cover the upper surface of the pressing plate.

[0019] As a further preferred, the front end of the discharge plate is provided with a wire outlet, the wire outlet is provided with a pressing block, the pressing block is in sliding fit with the wire outlet, the pressing block is fixedly connected with the front end of the pressing plate, the upper surface of the pressing block is aligned with the upper surface of the pressing plate, the bottom of the pressing block and the bottom of the wire outlet are fixedly connected with flexible sealing material, the flexible sealing material can adopt polyurethane sealant and other materials with high elasticity.

[0020] As a further preferred of the technical scheme, the temperature simulation assembly comprises:

[0021] Two temperature control boxes symmetrically distributed on both sides of the simulation box, the upper end of each temperature control box is fixedly provided with a refrigerating device and a heating device which are in communication with the inside of the temperature control box, the bottom of each temperature control box is in communication with the inside of the simulation box through a communication pipe, and an electric valve is arranged at the connection between the communication pipe and the simulation box.

[0022] A temperature sensor is fixedly arranged on the outer wall of the simulation box, and the probe of the temperature sensor is located in the inside of the simulation box.

[0023] As a further preferred of the technical scheme, the rainwater simulation assembly comprises:

[0024] Four water outlet pipes, four the water outlet pipes are located in the inside of the simulation box and are rectangularly distributed around the discharge plate, a plurality of spray heads in linear array are arranged on the outer wall of the water outlet pipe, and the spray heads are inclinedly arranged towards the direction of the placing groove.

[0025] A water pump is fixedly installed on the base, the water pumping end of the water pump is in communication with the bottom of the inner cavity of the simulation box through a water pumping pipe, the water discharging end of the water pump is provided with a water discharging pipe, four shunt pipes are communicated on the pipe wall of the water discharging pipe, and the other ends of the four shunt pipes are rotatably connected with one end of the four water outlet pipes.

[0026] As a further preferred of the technical scheme, the adjusting assembly comprises:

[0027] Four drive rods are fixedly connected to the outer walls of four water outlet pipes. The drive rods are located on the outer walls of the water outlet pipes on a side symmetrical to the nozzles. Rotating columns are fixedly fitted at both ends of each drive rod. The two ends of each drive rod are rotatably connected to the two inner walls of the simulation box through the rotating columns. Rotating grooves adapted to the rotation of the rotating columns are opened on the inner walls of the simulation box. The same end of each of the four drive rods extends to the rear outside of the simulation box.

[0028] Four gears, each of which is fixedly sleeved on the extension end of one of the four drive rods;

[0029] Two racks are arranged vertically and opposite to each other. Four gears are distributed in pairs on the opposite side of the two racks. Each rack meshes with two adjacent gears. The two racks are fixedly connected by a connecting cross plate.

[0030] Two slide rails are located between two racks and the simulation box, and the slide rails are fixedly connected to the outer wall of the simulation box. A slider is fixedly connected to the side of the rack near the simulation box, and the two sliders are respectively disposed inside the two slide rails and slidably installed with their inner walls.

[0031] The second cylinder is located below the connecting horizontal plate and is fixedly connected to the outer wall of the simulation box. The end of the telescopic rod of the second cylinder is fixedly connected to the bottom of the connecting horizontal plate.

[0032] As a further preferred embodiment of this technical solution, a pipe fitting connector is provided between the drain pipe and the diversion pipe. The pipe fitting connector is fixedly embedded in the front side wall of the simulation box. The two ends of the pipe fitting connector are located on the inner and outer sides of the simulation box, respectively. A central hole is opened at the axis of the pipe fitting connector. The end of the diversion pipe is fixedly connected to the end of the pipe fitting connector. The end of the drain pipe is located in the central hole. An annular plate is fixedly sleeved on the outer wall of the drain pipe. An annular groove is opened on the inner wall of the central hole. The annular plate and the annular groove are rotatably adapted to each other.

[0033] As a further preferred embodiment of this technical solution, a protective cover is provided at the rear end of the simulation box, and the two sides of the protective cover are fixedly connected to the simulation box through fixing plates. The gear, rack and pinion and the second cylinder are all located inside the protective cover.

[0034] This invention provides an LED display screen fault detection device, which has the following beneficial effects:

[0035] This invention facilitates the feeding and unloading of LED displays through a feeding component, automatically clamps the LED display when it enters the simulation chamber through a clamping component, and automatically releases the clamp when the LED display leaves the simulation chamber through an automatic clamping component. A temperature simulation component creates a high-temperature environment, a low-temperature environment, or a high-low temperature cycling environment within the simulation chamber, and a rainwater simulation component creates a rainwater environment within the simulation chamber. These high-temperature, low-temperature, high-low temperature cycling, and rainwater environments can be freely combined to test the operating status of the LED display under different combined environments. Based on the test results, the invention identifies the defects of the LED display under which environment and makes improvements and optimizations in that direction. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the main body in the LED display screen fault detection device of the present invention;

[0037] Figure 2 This is a cross-sectional structural diagram of the main body of an LED display screen fault detection device according to the present invention;

[0038] Figure 3 This is a schematic diagram of the back-side split structure of the main body in an LED display screen fault detection device of the present invention;

[0039] Figure 4 This is a schematic diagram of the feeding assembly in an LED display screen fault detection device of the present invention;

[0040] Figure 5 In an LED display screen fault detection device of the present invention Figure 4 A partially enlarged structural diagram;

[0041] Figure 6 This is a schematic diagram of the rainwater simulation component in an LED display screen fault detection device of the present invention;

[0042] Figure 7 This is a schematic diagram of the adjustment component in an LED display screen fault detection device of the present invention;

[0043] Figure 8 This is a schematic diagram of the drive rod in an LED display screen fault detection device according to the present invention;

[0044] Figure 9 This is a schematic diagram of the pipe connector in an LED display screen fault detection device of the present invention;

[0045] In the diagram: 100, Simulation box; 101, Base; 102, Sealing cover; 103, Discharge port; 104, High-definition camera; 200, Feeding assembly; 201, Discharge plate; 202, Guide plate; 203, First cylinder; 204, Connecting plate; 205, Connecting rod; 206, Through groove; 207, Placement groove; 208, Positioning groove; 209, Pressure plate; 210, Adaptor groove; 211, Outlet; 212, Pressure block; 213, Inclined surface; 300, Temperature simulation assembly; 301, Temperature control box; 302, Connecting pipe; 303 304 Electric valve; 405 Temperature sensor; 406 Rain simulation component; 407 Water pump; 408 Pumping pipe; 409 Drainage pipe; 4000 Diverter pipe; 4000 Outlet pipe; 401 Sprinkler head; 502 Adjustment component; 503 Drive rod; 504 Gear; 505 Rack; 506 Slider; 507 Slide rail; 508 Connecting cross plate; 509 Second cylinder; 500 Rotating column; 600 Pipe fitting connector; 601 Annular plate; 602 Annular groove; 700 Protective cover; 701 Fixing plate. Detailed Implementation

[0046] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0047] This invention provides a technical solution: such as Figures 1 to 9 As shown in this embodiment, an LED display screen fault detection device includes a simulation box 100 for simulating an environment, a feeding component 200 for facilitating the feeding and discharging of LED display screens, a temperature simulation component 300 for creating a high-temperature environment, a low-temperature environment, or a high-low temperature cycle environment within the simulation box 100, and a rainwater simulation component 400 for creating a rainwater environment within the simulation box 100.

[0048] The simulation box 100 has a base 101 at the bottom and a sealing cover 102 at the top. The edge of the sealing cover 102 is fixedly connected to the simulation box 100 with screws. A high-definition camera 104 is fixedly installed on the upper end of the sealing cover 102 (which allows the PLC controller or host computer to connect to the high-definition camera 104 to collect images of the display screen before and after the test, and automatically identify faults such as bright and dark spots, color abnormalities, flickering, and partial failures through comparison algorithms). The lens of the high-definition camera 104 is located inside the simulation box 100, which is convenient for the staff to observe the working status of the LED display screen. A material discharge port 103 is opened on the front side wall of the simulation box 100 for the LED display screen to enter and exit.

[0049] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the feeding assembly 200 is located in the middle of the simulation box 100. The feeding assembly 200 includes: a feeding plate 201, two first cylinders 203 and a connecting plate 204. The feeding plate 201 is located inside the simulation box 100. The front end of the feeding plate 201 slides through the feeding port 103. The feeding plate 201 is matched with the feeding port 103. A through groove 206 is provided in the middle of the feeding plate 201. A placement groove 207 is provided at the upper edge of the through groove 206. The placement groove 207 is used to accommodate the LED display screen. The through groove 206 can ensure that there are no obstructions at the bottom of the LED display screen.

[0050] Two first cylinders 203 are symmetrically distributed on both sides of the simulation box 100, and both first cylinders 203 are fixedly connected to the outer wall of the simulation box 100.

[0051] like Figure 3 As shown, the connecting plate 204 has a T-shaped structure and is located in front of the feeding plate 201. The telescopic rods of the two first cylinders 203 are fixedly connected to both ends of the connecting plate 204. The other end of the connecting plate 204 is fixedly connected to the front end of the feeding plate 201 through the connecting rod 205. The extension of the telescopic rod of the first cylinder 203 is controlled by the PLC control system, which can drive the feeding plate 201 to detach from the simulation box 100. The retraction of the telescopic rod of the first cylinder 203 is controlled to shorten, which can drive the feeding plate 201 into the simulation box 100.

[0052] To ensure the stability of the LED display screen during simulation within the simulation chamber 100, a clamping component is provided on the feeding assembly 200. The clamping component is configured to automatically clamp the LED display screen when it enters the simulation chamber 100 and automatically release the clamp when the LED display screen leaves the simulation chamber 100.

[0053] like Figure 4 and Figure 5 As shown, the clamping assembly includes: a pressure plate 209 and four guide plates 202. The upper surface of the feeding plate 201 is provided with a positioning groove 208 at the edge of the placement groove 207. The pressure plate 209 is disposed in the positioning groove 208. The length, width and height of the pressure plate 209 are the same as the length, width and height of the positioning groove 208. An adapter groove 210 is provided in the middle of the pressure plate 209. The length and width of the adapter groove 210 are equal to the length and width of the through groove 206.

[0054] like Figure 4 As shown, the guide plate 202 has an L-shaped structure. The four guide plates 202 are arranged in a rectangle to form a guide area. The guide area is aligned with the discharge port 103 and can guide the discharge plate 201. The two ends of the guide plate 202 are fixedly connected to the front and rear inner walls of the simulation box 100 respectively. The horizontal plate of the guide plate 202 located on the upper side needs to meet the size requirement that it can cover the upper surface of the pressure plate 209.

[0055] After the LED display screen is placed into the placement slot 207, the pressure plate 209 is placed into the positioning slot 208. Since the length and width dimensions of the adapter slot 210 on the pressure plate 209 are equal to the length and width dimensions of the through slot 206, the inner edge of the pressure plate 209 will press against the edge of the LED display screen. Also, since the length, width, and height dimensions of the pressure plate 209 are the same as those of the positioning slot 208, after the pressure plate 209 is placed into the positioning slot 208, the upper surface of the pressure plate 209 will align with the upper surface of the feeding plate 201. When the feeding plate 201 enters the simulation box 100, the four guide plates 202 will wrap around the four corners of the feeding plate 201, while the upper guide plate 202... The horizontal plate of guide plate 202 needs to meet the size requirement of covering the upper surface of pressure plate 209. The horizontal plate of guide plate 202 will press on the upper surface of pressure plate 209, and pressure plate 209 will press on the edge of LED display screen, thus automatically clamping and stabilizing LED display screen. When the feeding plate 201 leaves the simulation box 100 (it does not need to leave the simulation box 100 completely; the rear end of feeding plate 201 can be inside the simulation box 100 to ensure the stability of feeding plate 201. It is only necessary for the positioning groove 208 of feeding plate 201 to leave the simulation box 100), the upper end of pressure plate 209 loses the limit of guide plate 202, that is, it automatically releases the clamping effect on LED display screen.

[0056] To prevent the rear end of the pressure plate 209 from warping (e.g., warping caused by slight deformation of the material), which would cause the upper surface of the rear end of the pressure plate 209 to slightly protrude from the upper surface of the discharge plate 201 and prevent the discharge plate 201 from entering the simulation box 100 normally (the warped position of the rear end of the pressure plate 209 would get stuck at the discharge port 103), a slope 213 is provided on the upper surface of the rear end of the pressure plate 209. By setting the slope 213, the height of the upper surface of the rear end of the pressure plate 209 can be reduced. At this time, even if the rear end of the pressure plate 209 is slightly warped, when the discharge plate 201 enters the simulation box 100, the inner wall of the discharge port 103 will also press the rear end of the pressure plate 209 flat along the slope 213.

[0057] To facilitate the connection of the LED display screen with external power supply or signal input devices, a cable outlet 211 is provided on the upper front side of the feeding plate 201. A pressure block 212 is provided inside the cable outlet 211. The pressure block 212 slides and fits with the cable outlet 211. The pressure block 212 is fixedly connected to the front end of the pressure plate 209. The upper surface of the pressure block 212 is aligned with the upper surface of the pressure plate 209. Flexible sealing material is fixedly connected to the bottom of the pressure block 212 and the bottom of the cable outlet 211. The flexible sealing material can be a highly elastic material such as polyurethane sealant. When the feeding plate 201 enters the simulation box 100, the pressure block 212 will press down the cable in the cable outlet 211. The flexible sealing material between the pressure block 212 and the cable outlet 211 will deform and fill the gaps in the cable, preventing water inside the simulation box 100 from flowing out of the cable outlet 211.

[0058] like Figure 3 As shown, the temperature simulation component 300 is disposed on both sides of the simulation chamber 100 to create a high temperature environment, a low temperature environment, or a high and low temperature cycle environment inside the simulation chamber 100 to detect the state of the LED display screen in different temperature environments. The temperature simulation component 300 includes: two temperature control boxes 301 symmetrically distributed on both sides of the simulation chamber 100 and a temperature sensor 304. The upper ends of the two temperature control boxes 301 are respectively fixedly installed with a cooler and a heater connected to their interiors. The bottoms of the two temperature control boxes 301 are respectively connected to the interior of the simulation chamber 100 through a connecting pipe 302.

[0059] Temperature sensor 304 is fixedly mounted on the outer wall of simulation chamber 100, and the probe of temperature sensor 304 is located inside simulation chamber 100.

[0060] Temperature sensor 304 can detect the temperature inside the simulation chamber 100 in real time and, in conjunction with the PLC control system, control the power of the cooler and heater. (It should be noted that the PLC control system does not directly change the rated power of the cooler or heater, but rather adjusts the on-time percentage (duty cycle) of the actuator (usually an SSR) within a fixed cycle (e.g., 1 second) to change the average power of the cooler or heater.) This achieves temperature regulation inside the simulation chamber 100, thereby simulating high-temperature, low-temperature, or high-low temperature cycling environments. The temperature control box 301 can mitigate the heat, preventing the simulation chamber 100 from directly facing a heat or cold source, which could lead to uneven internal heat distribution. This is because heat distribution follows a pattern where the temperature is highest near the heat source, gradually stabilizes with distance, but drops sharply beyond the heating range. The temperature control box 301 and the connecting pipe 302 ensure that the simulation chamber 100 is located in an area with a more uniform heat distribution.

[0061] During temperature environment simulation, to prevent both temperature control boxes 301 from being connected to the simulation box 100 simultaneously, which would increase the internal space of the device and expand the heat diffusion range, an electric valve 303 is installed at the connection between the connecting pipe 302 and the simulation box 100. The electric valve 303 is configured such that when one temperature control box 301 is working, the channel between that temperature control box 301 and the connecting pipe 302 is opened, and the channel between the other temperature control box 301 and the connecting pipe 302 is closed. The electric valve 303 is controlled by a PLC control system.

[0062] Rain simulation component 400 is disposed around the feeding component 200 to create a rain environment inside the simulation box 100 to detect the state of the LED display screen in the rain environment. Rain simulation component 400 includes: water pump 401 and four water outlet pipes 405. The four water outlet pipes 405 are all located inside the simulation box 100 and are distributed in a rectangular shape around the feeding plate 201. Several nozzles 406 arranged in a straight line are provided on the outer wall of the water outlet pipes 405. The nozzles 406 are inclined towards the placement groove 207.

[0063] The water pump 401 is fixedly installed on the base 101. The water pump 401's pumping end is connected to the bottom of the inner cavity of the simulation box 100 through the pumping pipe 402. The water pump 401's draining end is provided with a drain pipe 403. Four branch pipes 404 are connected to the wall of the drain pipe 403. The other end of the four branch pipes 404 is rotatably connected to one end of the four outlet pipes 405 respectively.

[0064] The PLC control system controls the water pump 401. After the water pump 401 starts, it can draw out the water prepared in advance from the bottom of the inner cavity of the simulation box 100, discharge it from the drain pipe 403, and spray it out from the nozzle 406 along the diversion pipe 404 and the outlet pipe 405. The nozzles 406 on the four drain pipes 403 can spray water onto the LED display screen from four directions, ensuring that the LED display screen is fully in contact with the water. The water that falls will return to the bottom of the simulation box 100, thus ensuring the recycling of water. In order to prevent dust from clogging the nozzles 406, a screen can be installed at the end of the water pumping pipe 402, which is not shown in the figure.

[0065] To prevent the nozzle 406 from spraying water in a single direction, causing the water to always spray onto the same spot on the LED display screen, the rain simulation component 400 is equipped with an adjustment component 500. The adjustment component 500 is configured to control the water spraying direction to change repeatedly when the rain simulation component 400 is working.

[0066] like Figure 7 and Figure 8As shown, the adjustment assembly 500 includes: four drive rods 501, four gears 502, two racks 503, two slide rails 505, and a second cylinder 507. The four drive rods 501 are respectively fixedly connected to the outer walls of the four water outlet pipes 405. The drive rods 501 are located on the side of the outer wall of the water outlet pipes 405 that is symmetrical to the nozzles 406. Rotating columns 508 are fixedly sleeved at both ends of the drive rods 501. The two ends of the drive rods 501 are rotatably connected to the two inner walls of the simulation box 100 through the rotating columns 508. The inner wall of the simulation box 100 is provided with a rotating groove (not shown in the figure) that is adapted to the rotation of the rotating columns 508. The same end of the four drive rods 501 extends to the rear outside of the simulation box 100.

[0067] Four gears 502 are respectively fixedly sleeved on the extension ends of four drive rods 501.

[0068] Both racks 503 are vertically arranged and back to back. Four gears 502 are distributed in pairs on the side of the two racks 503 that are far apart from each other. The racks 503 mesh with the two adjacent gears 502. The two racks 503 are fixedly connected by a connecting plate 506.

[0069] Two slide rails 505 are located between the two racks 503 and the simulation box 100, respectively. The slide rails 505 are fixedly connected to the outer wall of the simulation box 100. A slider 504 is fixedly connected to the side of the rack 503 near the simulation box 100. The two sliders 504 are respectively set inside the two slide rails 505 and slidably installed on their inner walls.

[0070] The second cylinder 507 is located below the connecting horizontal plate 506. The second cylinder 507 is fixedly connected to the outer wall of the simulation box 100, and the end of the telescopic rod of the second cylinder 507 is fixedly connected to the bottom of the connecting horizontal plate 506.

[0071] The PLC control system controls the telescopic rod of the second cylinder 507 to extend and retract cyclically, driving the connecting horizontal plate 506 to move up and down cyclically. The two racks 503 connected to the connecting horizontal plate 506 will move synchronously. The racks 503 will drive the gears 502 meshing with them to rotate back and forth. Driven by the drive rod 501, the nozzle 406 on the water outlet pipe 405 will rotate back and forth. It should be noted that the angle of reciprocating rotation should not exceed 20°. Controlling the nozzle 406 to rotate back and forth within a small range allows the water sprayed by the nozzle 406 to more comprehensively cover the LED display screen and avoids the nozzle 406 spraying water in a single direction.

[0072] like Figure 9As shown, a pipe fitting connector 600 is provided between the drain pipe 403 and the diversion pipe 404. The pipe fitting connector 600 is fixedly embedded in the front side wall of the simulation box 100. The two ends of the pipe fitting connector 600 are located on the inner and outer sides of the simulation box 100, respectively. A central hole is opened at the axis of the pipe fitting connector 600. The end of the diversion pipe 404 is fixedly connected to the end of the pipe fitting connector 600. The end of the drain pipe 403 is located in the central hole. An annular plate 601 is fixedly sleeved on the outer wall of the drain pipe 403. An annular groove 602 is opened on the inner wall of the central hole. The annular plate 601 and the annular groove 602 are rotatably adapted. Through the setting of the pipe fitting connector 600, the annular plate 601 and the annular groove 602, the drain pipe 403 and the diversion pipe 404 can be rotatably connected.

[0073] To prevent the adjusting component 500 from being exposed to air for extended periods, which could lead to dust or foreign matter contaminating the meshing clearance between the gear 502 and rack 503 and accelerating tooth surface wear (resulting in pitting and scuffing defects), causing a decrease in the precision of the gear 502 and an increase in transmission clearance, thereby generating abnormal noise and vibration, a protective cover 700 is provided at the rear end of the simulation box 100. The two sides of the protective cover 700 are fixedly connected to the simulation box 100 via fixing plates 701. The gear 502, rack 503, and second cylinder 507 are all located inside the protective cover 700.

[0074] The wiring diagrams for the PLC control system, high-definition camera 104, first cylinder 203, refrigerator, heater, electric valve 303, temperature sensor 304, water pump 401, and second cylinder 507 in this invention are common knowledge in the field. Their working principles are well-known technologies, and the appropriate models are selected according to actual use. Therefore, the control methods and wiring arrangements for the PLC control system, high-definition camera 104, first cylinder 203, refrigerator, heater, electric valve 303, temperature sensor 304, water pump 401, and second cylinder 507 will not be explained in detail.

[0075] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fault detection device for an LED display screen, characterized in that, include: Simulation box (100), which is used to simulate the environment; A feeding assembly (200) is located in the middle of the simulation box (100) to facilitate the feeding and discharging of the LED display screen. The feeding assembly (200) is equipped with a clamping assembly, which is configured to be automatically clamped when the LED display screen enters the simulation box (100) and automatically released when the LED display screen leaves the simulation box (100). A temperature simulation component (300) is disposed on both sides of a simulation chamber (100) for creating a high-temperature environment, a low-temperature environment, or a high-low temperature cycling environment within the simulation chamber (100). The temperature simulation component (300) includes two temperature control chambers (301) symmetrically distributed on both sides of the simulation chamber (100). A cooler and a heater connected to the interior of each temperature control chamber (301) are fixedly installed at the top of the two temperature control chambers (301). The bottoms of the two temperature control chambers (301) are connected to the interior of the simulation chamber (100) through connecting pipes (302). An electric valve (303) is provided at the connection between the connecting pipe (302) and the simulation chamber (100). A rainwater simulation component (400) is disposed around the feeding component (200) to create a rainwater environment inside the simulation box (100). An adjustment component (500) is provided on the rainwater simulation component (400). The adjustment component (500) is configured to control the direction of water spraying to change repeatedly when the rainwater simulation component (400) is working. The rainwater simulation component (400) includes four water outlet pipes (405). The four water outlet pipes (405) are all located inside the simulation box (100) and are distributed in a rectangular shape around the feeding plate (201). Several nozzles (406) arranged in a straight line array are provided on the outer wall of the water outlet pipes (405). The nozzles (406) are inclined towards the placement groove (207).

2. The LED display screen fault detection device according to claim 1, characterized in that: The simulation box (100) has a base (101) at the bottom and a sealing cover (102) at the top. The edge of the sealing cover (102) is fixedly connected to the simulation box (100) by screws. A high-definition camera (104) is fixedly installed on the upper end of the sealing cover (102). The lens of the high-definition camera (104) is located inside the simulation box (100). A discharge port (103) is opened on the front side wall of the simulation box (100). The discharge port (103) is used for the entry and exit of the LED display screen.

3. The LED display screen fault detection device according to claim 1, characterized in that: The feeding assembly (200) includes: A feeding plate (201) is located inside the simulation box (100). The front end of the feeding plate (201) slides through the feeding port (103). The feeding plate (201) is matched with the feeding port (103). A through groove (206) is provided in the middle of the feeding plate (201). A placement groove (207) is provided at the upper edge of the through groove (206). The placement groove (207) is used to accommodate the LED display screen. The through groove (206) can ensure that there are no obstructions at the bottom of the LED display screen. Two first cylinders (203) are symmetrically distributed on both sides of the simulation box (100), and both first cylinders (203) are fixedly connected to the outer wall of the simulation box (100). The connecting plate (204) is a T-shaped structure and is located on the front side of the feeding plate (201). The telescopic rods of the two first cylinders (203) are respectively fixedly connected to both ends of the connecting plate (204). The other end of the connecting plate (204) is fixedly connected to the front end of the feeding plate (201) through the connecting rod (205).

4. The LED display screen fault detection device according to claim 1, characterized in that: The clamping assembly includes: The upper surface of the pressure plate (209) and the feeding plate (201) is provided with a positioning groove (208) at the edge of the placement groove (207). The pressure plate (209) is set in the positioning groove (208). The length, width and height of the pressure plate (209) are the same as the length, width and height of the positioning groove (208). The upper surface of the rear end of the pressure plate (209) is provided with a slope (213). The middle part of the pressure plate (209) is provided with an adapter groove (210). The length and width of the adapter groove (210) are equal to the length and width of the through groove (206). Four guide plates (202) are L-shaped and arranged in a rectangular pattern to form a guide area. The guide area is aligned with the discharge port (103) and can guide the discharge plate (201). The two ends of the guide plates (202) are fixedly connected to the front and rear inner walls of the simulation box (100). The horizontal plate of the guide plate (202) located on the upper side needs to meet the size requirement that it can cover the upper surface of the pressure plate (209).

5. The LED display screen fault detection device according to claim 3, characterized in that: The front end of the feeding plate (201) is provided with a cable outlet (211). A pressure block (212) is provided inside the cable outlet (211). The pressure block (212) is slidably engaged with the cable outlet (211). The pressure block (212) is fixedly connected to the front end of the pressure plate (209). The upper surface of the pressure block (212) is aligned with the upper surface of the pressure plate (209). Flexible sealing material is fixedly connected to the bottom of the pressure block (212) and the bottom of the cable outlet (211).

6. The LED display screen fault detection device according to claim 1, characterized in that: The temperature simulation component (300) also includes: Temperature sensor (304) is fixedly mounted on the outer wall of the simulation chamber (100), and the probe of the temperature sensor (304) is located inside the simulation chamber (100).

7. The LED display screen fault detection device according to claim 1, characterized in that: The rainwater simulation component (400) also includes: A water pump (401) is fixedly installed on a base (101). The pumping end of the water pump (401) is connected to the bottom of the inner cavity of the simulation box (100) through a pumping pipe (402). The draining end of the water pump (401) is provided with a drain pipe (403). Four branch pipes (404) are connected to the pipe wall of the drain pipe (403). The other ends of the four branch pipes (404) are rotatably connected to one end of four outlet pipes (405).

8. The LED display screen fault detection device according to claim 1, characterized in that: The adjustment component (500) includes: Four drive rods (501) are fixedly connected to the outer walls of four water outlet pipes (405). The drive rods (501) are located on the side of the outer wall of the water outlet pipes (405) symmetrical to the nozzles (406). Rotating columns (508) are fixedly sleeved on both ends of the drive rods (501). The two ends of the drive rods (501) are rotatably connected to the two inner walls of the simulation box (100) through the rotating columns (508). A rotating groove adapted to the rotation of the rotating columns (508) is opened on the inner wall of the simulation box (100). The same end of the four drive rods (501) extends to the rear outside of the simulation box (100). Four gears (502) are respectively fixedly sleeved on the extension ends of four drive rods (501); Two racks (503) are arranged vertically and facing away from each other. Four gears (502) are distributed in pairs on the side of the two racks (503) that are far apart from each other. Each rack (503) meshes with the two adjacent gears (502). The two racks (503) are fixedly connected by a connecting cross plate (506). Two slide rails (505) are respectively located between two racks (503) and the simulation box (100). The slide rail (505) is fixedly connected to the outer wall of the simulation box (100). A slider (504) is fixedly connected to the side of the rack (503) near the simulation box (100). The two sliders (504) are respectively disposed inside the two slide rails (505) and slidably installed on their inner walls. The second cylinder (507) is located below the connecting horizontal plate (506). The second cylinder (507) is fixedly connected to the outer wall of the simulation box (100). The end of the telescopic rod of the second cylinder (507) is fixedly connected to the bottom of the connecting horizontal plate (506).

9. The LED display screen fault detection device according to claim 7, characterized in that: A pipe fitting connector (600) is provided between the drain pipe (403) and the diversion pipe (404). The pipe fitting connector (600) is fixedly embedded on the front side wall of the simulation box (100). The two ends of the pipe fitting connector (600) are located on the inner and outer sides of the simulation box (100), respectively. A central hole is opened at the axis of the pipe fitting connector (600). The end of the diversion pipe (404) is fixedly connected to the end of the pipe fitting connector (600). The end of the drain pipe (403) is located in the central hole. An annular plate (601) is fixedly sleeved on the outer wall of the drain pipe (403). An annular groove (602) is opened on the inner wall of the central hole. The annular plate (601) and the annular groove (602) are rotatably adapted to each other.

10. The LED display screen fault detection device according to claim 8, characterized in that: The rear end of the simulation box (100) is provided with a protective cover (700). The two sides of the protective cover (700) are fixedly connected to the simulation box (100) by fixing plates (701). The gear (502), rack (503) and second cylinder (507) are all located inside the protective cover (700).

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