Wireless distributed led traffic guidance screen system

Abstract

The invention discloses a wireless distributed LED traffic guidance screen system. Including a coordinator (103), multiple routing display nodes (101), multiple terminal display nodes (102), a control module (104) and a communication module (105); the coordinator (103) and multiple routing display nodes Between the nodes (101), two-way wireless communication is performed between multiple routing display nodes (101) and multiple terminal display nodes (102); a serial port of the control module (104) is connected to the coordinator (103), and the control module Another serial port of (104) is connected with communication module (105). The display screen of the present invention is divided into multiple independent sub-areas, and the distributed control of each sub-area by ZigBee wireless network is used to enhance the reliability of the system; the data throughput is shared on multiple CPUs, and the performance requirements for a single CPU are significantly The system stability is improved, and the hardware structure of all nodes is the same, which improves the versatility and interchangeability of circuit boards, and reduces the cost of printed circuit board manufacturing.

Description

technical field [0001] The invention relates to LED display technology, in particular to a wireless distributed LED traffic guidance display system. Background technique [0002] LED traffic guidance screens are widely used on urban roads and highways. With the increase of labor costs, the maintenance cost of guidance screens is also increasing year by year. It has become a market necessity to develop traffic guidance screens with high reliability, high stability and low maintenance rate. [0003] Chinese patent specification "Wireless LED display control system based on ZigBee" (authorized announcement number: CN102289359 B), "a wireless LED display system based on TD-SCDMA network" (authorized announcement number: CN203746360 U) discloses the wireless Communication technology is used for LED display, the former uses ZigBee technology, and the latter uses 3G technology. Their shortcoming is that only wireless communication technology is used instead of wired serial communi...

AI Technical Summary

Problems solved by technology

Their shortcoming is that only wireless communication technology is used instead of wired serial communication to realize wireless data communication for the entire LED display, but wired centralized control methods are still used inside the LED display, which cannot improve the work of the LED display. reliability and stability

[0004] The Chinese patent specification "Distributed Wireless LED Display System" (authorized announcement number: CN 101206820 B) discloses a LED display system with single-pixel distributed display and centralized wireless data communication. The disadvantage is that each pixel An independent controller and related circuits are required. When there are many pixels, the hardware cost is very high; the pixel pitch is very large, which is not suitable for LED display systems with tight pixel pitch; centralized wireless data communication directly results in slow display update speed, only Suitable for displaying pre-stored graphics and text information

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