Common LED traffic guidance screen function and classification
1. Four functions of LED traffic guidance display
1. High brightness and wide viewing angle
The traffic induction LED display requires high luminous brightness and wide viewing angle; the luminous brightness of the display can be automatically adjusted according to the ambient light intensity. Under normal circumstances, LED traffic guidance screens must work continuously around the clock and 24 hours a day, and the display content can be clearly seen under direct sunlight. Under normal circumstances, the visual distance of the display screen is required to be about 200m.
2. Diversified display colors, methods and information
The color, mode and information of the display screen are diversified. According to the traffic guidance system and environmental requirements, personalized audio-visual, video, image, text and other traffic information can be displayed in different ways, so that passing pedestrians can understand traffic information in real time and accurately.
3. High protection level
Outdoor traffic induced led display screens require a high protection level, and the structural design of the led display screen box should meet the requirements of IP65 protection level. Since the LED traffic guidance display works under outdoor conditions, the environmental conditions are complex, and the requirements for temperature, power supply, rain resistance, moisture resistance, corrosion resistance, lightning protection, etc. are complex, and at the same time require high reliability. Take specific targeted measures.
4. Remote control
If you want to monitor the road conditions from time to time, you need synchronous control, and synchronous control requires PC or other equipment to control it, but it is obviously unreasonable to install a computer on the highway. So remote control is needed. Through remote control and intelligent detection, the system can ensure safe, real-time, accurate and reliable display of traffic information.
The led display is a media that releases real-time and accurate traffic information to the public. Therefore, the system has higher requirements on security and reliability. In order to ensure the stability and reliability of the traffic induction LED display screen, the selection and quality requirements of the display control system, software, LED pixel tube, integrated circuit, etc. should be stable and reliable. At the same time, traffic guidance led display screens generally work in a network environment and release public information, which also has higher requirements for security.
2. Five classifications of LED traffic guidance screens
1. Gantry variable display screen
The gantry-type variable information screen is the main way of dissemination of information on expressways. Due to its large size, a cross-road gantry is generally used as the bracket for the variable electronic display screen. The main monitoring computer implements remote control through the communication network, transmits and displays various A variety of graphic information, timely release of different road conditions and various traffic information on different road sections to drivers, and publicize traffic laws and traffic knowledge, so as to reduce recurring congestion on expressways and reduce the impact of non-recurring accidents on expressways , The purpose of improving driving safety; thereby effectively dredging traffic and improving the efficiency of expressway use.
2. Variable speed limit display (board)
Most of the variable speed limit led display screens are installed on some key road sections with complex road conditions or super-large bridges, and most of them are circular or single-arm hanging single-block screens. The computer in the monitoring center implements remote control through the communication network, transmits and displays the speed limit mileage or short traffic information of the road section, and plays the role of prompting the vehicle to drive according to the speed limit and ensuring driving safety.
3. Mobile traffic information screen
During expressway construction and maintenance, if expressway authorities or construction workers temporarily close or change lanes, how to inform road users of traffic information is very important. The fixed variable information board is limited by the uncertainty of the road construction site or the long distance, so it is not easy to play a role. The mobile LED traffic information screen (LED vehicle display screen) is small, flexible and light, suitable for installation on a trailer-type motor vehicle, and can be placed on the target site for direct display anytime and anywhere, making up for the shortcomings of the fixed variable information board.
4. Guidance finger (warning) display screen
In order to ensure the safety of expressway construction workers, vehicles and other vehicles running normally, expressway operating vehicles must be equipped with eye-catching high-brightness signs to warn and guide other subsequent vehicles to avoid accidents. The guidance warning led display is just the necessary equipment for construction vehicles on the highway.
5. Service display screen
Service led display screen refers to the LED equipment installed in the toll booth area and service area to provide various services and publicity. Through the toll plaza, the parking lot in the service area, and the installed indoor LED display screen, it provides various information such as real-time road conditions and service assistance to the passing drivers and passengers in a timely manner, which facilitates the travel of drivers and passengers and improves the management level and external image of the road section.