With the social development and progress, more and more vehicles are put into. In the industrial and agricultural production and people's living standards brought about great convenience at the same time, the number of vehicles due to the rapid growth of urban traffic problems have become increasingly prominent. Vehicle growth rate much higher than the rate of road construction, traffic congestion has become a city, especially in large, and especially large cities in the day, traffic has become a bloated national economic development constraints of a huge bottleneck, to resolve the problem of traffic congestion has become imperative任务.

Great efforts to increase investment in roads, building more roads and traffic network construction, of course, it will help ease the status quo. However, in addition to huge capital investment, but also use up a lot of valuable land resources. At the same time, a simple increase in the use of the road to alleviate traffic pressure, when the number of vehicles continues to grow, the more it is bound to increase input. As far as possible whether a reasonable flow of traffic scheduling and raise the utilization rate of the current road, you can increase investment in a relatively small, to ease the problem, there will be a very important social and economic value. Intelligent Transportation System is to achieve this goal came into being.
Intelligent Transportation System is an advanced information technology, data communication transmission technology, electronic sensing technology, electronic control technology and computer processing technology, integrated and effective application of traffic management system as a whole on the ground and in the establishment of a large-scale, full - Play a role, in real time, accurate, comprehensive and efficient transport management system. To play the effect of ITS, in addition to the need for reasonable transport scheduling, but also be able to dispatch the last management information timely and accurate release out.


Popular on the market today have a large display magnetic flip screen wall TV (CRT display), projectors, fluorescent tube display, light emitting diodes (LED) display, plasma (PDP) screens, and so on. The LED display is a certain degree of control the way for the text, text, graphics, images, animation, and other market information, as well as television and video signals by the LED devices composed of an array of display screen. Compared with other display, with a colorful, wide angle, high brightness, low power, performance, reliability, long life, and so can not be substituted by technology, especially suitable for traffic-induced, such as e-stop production outside the show:

High-Brightness

Traffic information shows that the first one of the most obvious characteristics of the occasion is used outdoors, a strong background light. CRT, LCD display, and so can not use. IED static full-screen brightness to a single point to reach more than 3000mcd in strong sunlight is still dazzlingly beautiful.

Visual area, visible from far away

LED screen box assembly by using the method shows that the area can reach more than 100 square meters. The LED can reach a diameter of a single point of 52mm, more than 500 meters from the video. The single point by the composition of the LED screen images from the video will be far greater than 500 meters to 1000 meters above. This feature is available in the electronic display, in addition to the LED display, no other can.

Respond to the fast penetration

This is a shared characteristic of semiconductor devices, LED's only a nanosecond response time. Fully meet the needs of video playback. Since the fall to stimulate LED light, highly penetrating. Can be applied to the weather, wind snow and rain.

Broadcast content, capacity

LED displays will not only broadcast text, pictures, all kinds of traffic signs, can also play DVD, VCD and even video directly into a variety of media, the control unit can display a large number of depositors, to support the program the way the pages displayed on a rotational basis; in the show Ping received new information (or instructions) may be interrupted pages displayed on a rotational basis, immediately show the new information received, or the implementation of the new directive.

Low-power, high reliability

Per square meter of the largest power does not exceed 800W. Long life: the life of the light-emitting diode l 0 million hours or more LED display in the Intelligent Transportation System command function, is used for docking port traffic control system is under the information as shown in the end, the scheduling of Information officers to inform the road. Control system into the general embedded computer interface flexibility, high scalability. In addition to the common industrial serial and extraoral, and Ethernet, WIFI, USB, 1394, S-Video port, and so on, and expand as needed. And control center can be a variety of equipment and the second as a docking terminal display, LED screen to broadcast text, symbols, graphics, images and video, support for popular multimedia file formats, such as: BMP, JPG, GIF, TIFF, and other graphics formats, AvI MPEG, dynamic GIF, FLC (3DS animation files), and other file formats, file formats supported by the system can be upgraded to expand. Can be released are as follows:

Traffic congestion information

The road in front of the traffic situation in a timely manner to inform the driver to choose the road to avoid the congestion further, then the car can be avoided due to the knowledge of the situation to be trapped in traffic jams.

Traffic Information

At that time, congestion is taking shape, release traffic control information, to achieve ahead of schedule, the pavement has not yet caught in the traffic jam situation, the traffic dispersed in a timely manner to avoid the formation of congestion and ensure smooth road. Secondly, for special circumstances, such as large-scale meetings or processions, and so on, the release command and control information.

Traffic Accidents

Release traffic accident information, refer to wake up the driver's attention, and select the correct routing information on road construction in the need for road construction maintenance, installation of traffic, or newly built roads, issued the instructions of the relevant information.

Sudden event information

Temporary emergency events, such as diplomatic convoy passed, the emergency closure of the road, or natural disaster, and so on.

Climatic conditions

LED screen through its own sensors and control systems, real-time release of the temperature, humidity, the noise index, the index of air and road visibility, and other information, the road to provide real-time reference.

Traffic safety education

According to the traffic management needs, publish the content of education, including drivers, it could be a road nearby residents and traffic safety education laws and regulations.

Other relevant information or used for future expansion of the system.

Transport system for the display, in addition to general technical requirements, but also traffic in accordance with the needs of a new scheduling. Traffic in the chain of command issued by the information, real-time great, but also to human lives as well. Release of the Terminals extremely high reliability requirements. Therefore, the transport system for LED display, designed to take various measures to ensure the release of information in the right, at the same time when the system does not work for some reason, not to display an error message. The key ones are:

Grade distributed control

Traffic induced by the use of the large number display, the widespread distribution for adopting a classification network control. Outdoor induced traffic information center showed that the main and sub-control center levels, under normal circumstances, the main center by the direct control of the command center around the need to directly display the relevant information. Information rights can be set by the system; in the command center at the main command center and network connection interruption, the center of the sub-control system can be connected to the independent control of the central points of the outdoor display; in the outdoor display with the command (Sub-) center of communication connections break, can be used in notebook computers on-site operation and control of information display.

Display monitor and alarm failure

Remote monitoring system display, each screen display information, display all the running and so on. Operation include: the power switch, power detection display the results of the brightness parameters, the temperature inside the screen, the fault information to show the contents of the simulation shows that display all running. At the same time, software system detected the fault display all the information, according to the level of failure to classify, and display the contents of the impact of failure to carry out part of the report to the police for the purpose of maintenance repair and maintenance personnel in a timely manner, all the alarm information stored in a database , To provide information, delete functions. Failure is particularly serious, the screen automatically shut down and police superiors.

Automatic brightness adjustment

Screen brightness can automatically adjust the brightness according to the environment, adjusting the scope of not less than 8. Tune-in since the days when direct sunlight display surface conditions, the required distance from a clear identification of content; tune dark at night when no glare phenomenon.

Real-time testing the effectiveness of LED

When the screen there is out of control point, the software will show the failure to detect the results of bitmap file format to upload this sub-system, the bitmap file with the data show that logic operations, the results of this simulation shows that the combination of the failure of the screen test As a result, out of control points can not be repaired in a timely manner, makes out of control point on the content of the show's impact can be expected to avoid the mistakes show content, such as stroke, such as lack of display content, such as incomplete.

Real-time communication detection

Road Traffic on the use of the screen to display real-time traffic scheduling information, must be able to maintain contact with the command center, automatic transmission testing; when the communication failure, automatic call general information program, the realization of universal information showed Automatic cycle . For example, rather than out of date or erroneous information and misleading the driver scheduling.

With the intelligent transportation technology development, we believe that the road is bound to become a wide, ever-shun!


Reference link: http://www.17led.com/LEDdisplay/2008-03/1.html