What factors should be paid attention to for outdoor LED large screens? The installation environment of outdoor LED large screens is harsh, exposed to high temperature ultraviolet radiation in summer, and affected by severe cold and freezing in winter. Now ubiquitous signal sources will cause unpredictable consequences to LED large screens. Therefore, in the design 1. When installing the LED large screen, it is necessary to plan in advance and supplement the knowledge of the LED large screen. Precautions for installation of outdoor LED large screens Waterproof and moisture-proof, outdoor LED large screens are installed outdoors, often exposed to the sun and rain, wind blows dust cover, and the working environment is harsh. If the electronic equipment is wet or severely damp, it will cause short circuit or even fire, causing failure or even Fire will cause losses; the LED screen body must have good drainage measures, and once water accumulates, it can be discharged smoothly; therefore, the joint between the LED screen body and the building must be strictly waterproof and leak-proof; pay attention to waterproof and moisture-proof. Generally, the outdoor LED large screen has a large installation area, and most of them are installed in densely populated places. The design of the steel structure should consider foundation, wind load, waterproof, dustproof, moisture-proof, ambient temperature, lightning protection, surrounding population density, etc. factor.
At the same time, auxiliary equipment such as power distribution cabinets, air conditioners, axial fans, lighting, etc. must be placed in the steel structure, as well as maintenance facilities such as horse tracks and ladders. Therefore, during implementation, the entire outdoor LED large screen steel structure should have design drawings that have passed the review of the competent government department to ensure the reliability and safety of the entire steel structure. Precautions for installation of outdoor LED large screen Ventilation and heat dissipation, outdoor LED large screens should be installed with ventilation equipment to cool down, so that the internal temperature of the LED screen is -10°C to 40°C.
An axial flow fan is installed above the back of the LED screen to discharge heat; when the outdoor LED large screen is working, it will generate a certain amount of heat. Display system is not working properly. Outdoor LED large screen installation precautions Power supply system, outdoor LED large screen generally adopts AC220V current power supply, the grid voltage fluctuation is required to be less than 10%, and a good system grounding is provided. For large screens with power consumption exceeding 10kW, special power distribution cabinets should be equipped.
In outdoor LED screens, the general environmental conditions are poor, and it is recommended to use a power distribution cabinet with PLC control; in indoor screen projects, the environment is better and the space is limited, so PLC control is not required. In order to prevent leakage fires, a fire leakage switch should also be installed at the main switch of the power supply line. The LED controller monitoring interface in the power distribution cabinet can display real-time temperature on the large LED screen.
In the automatic state, when the temperature inside the LED screen exceeds 65 degrees, the monitoring screen will prompt that the temperature is too high, and at the same time, the LED controller will sound an alarm, and the system will automatically cut off the power to prevent a fire. According to the actual situation, a smoke detector can be installed in the large screen. When a fire occurs in the LED screen, there will be a corresponding prompt message on the monitoring interface, and at the same time, it can be linked with the power distribution system to automatically cut off the power. The power distribution cabinet with remote control function or PLC control function can be selected according to the needs. The power distribution cabinet with PLC control function is more intelligent, and the LED controller can be used to remotely operate the outdoor LED large screen and the air conditioner, fan and other equipment in the screen. At the same time, it can also monitor the ambient temperature inside the LED screen and the ambient brightness outside the screen in real time, and have corresponding alarm information.
Precautions for installation of outdoor LED large screens Lightning protection and grounding, the integration of electronic components in outdoor LED large screens is high, and the sensitivity requirements for anti-interference are getting higher and higher. Lightning can harm the display system in various ways. Generally, it may directly hit the LED screen and then leak into the ground through the grounding device. Causes mechanical, electrical and thermal damage where the lightning current passes.
The grounding of the outdoor LED large screen should consider its grounding form according to the specific situation; when the LED large screen is installed independently, a separate grounding system should be set up, and the grounding resistance should not exceed 4 ohms; when the LED large screen is attached to the building On the external wall, the main body and shell of the large screen should be well grounded with the building, and share a common ground with the building. The grounding resistance should not be greater than 1 ohm. The solution is equipotential connection, that is, the ungrounded or not well-grounded metal shell, the metal sheath of the cable, and the metal frame in the LED large screen are connected to the grounding device by reliable welding, so as to prevent these objects from being induced by high voltage or lightning on the grounding device. The transmission of high potential into the ground causes an overvoltage counterattack to the internal insulation of the equipment and the cable core wire. Outdoor LED large screens will also be attacked by strong electric and strong magnetism caused by lightning. Install a lightning protection device on the object.