Intelligent Transportation ---- Electronic Station Board (LCD) Application Program I. Electronic Station Card Function
The main station display board is installed at the site of the first and last monitored line, and adopts advanced wireless communication technology, microprocessor control technology and computer network technology, through the dispatch center, the vehicle position on the bus line, vehicle running time, etc. The information is quickly and accurately displayed to the station's electronic display board for waiting passengers, drivers and other people.
Second, the system architecture
The terminal station electronic station board adopts 32-inch/42-inch LCD display. The display mode can be divided into two types: full screen display and split screen display. Terminus E-stop cards are reserved for digital TV or local media playback interfaces. Split-screen display is used when playing digital TV or local media. Other time using full-screen display.
This system is mainly composed of dispatching data distribution center, GPRS communication module, LCD display screen, management control software and control host. It uses INTERNET and GPRS network to realize remote information release and management functions. The structure of the system is shown in the figure below:
Third, the scheduling data distribution center dispatch data distribution center is responsible for the implementation of information input, editing, management, release, communication station card terminal status monitoring and other functions; dispatch center and station card terminals to form a VPN network through GPRS, communication protocol using TCP / UDP This facilitates unified management of information distribution.
Fourth, stop sign LCD display Stop sign display adopts 32 or 42 inches 16:9 LCD display, through the GPRS module will receive the legitimate information displayed on the LCD screen, to achieve long-range wireless transmission of information.
V. GPRS communication module The GPRS module passes the received legal information to the display control host through the standard RS232 serial port and displays it on the LCD screen after being processed by the control software; it can also transmit the self-inspection information of the stop card terminal to the dispatching center to realize the background. The remote status monitoring of the station card terminal; the remote control and parameter setting of the station card terminal can also be realized through the remote parameter setting command.
6. Control software terminal station terminal information processing and display control software. The software is based on Linux system development. It receives the scheduling information through the GPRS module and displays it on the LCD screen. The system reserves digital TV (DVB-T) interface and can Realize the broadcast of digital TV and local media files and the segmentation and positioning of video windows.
Seven, control the host
The control host is an intelligent industrial control EM-9761 embedded x86 industrial control board, which realizes the display system and communication system drive and the storage of data information.
Eight, electronic stop sign construction plans