System design and application of Visible light Communication technology based on FPGA and Ethernet

The traditional optical fiber communication is limited by economy, flexibility and other factors, and it is difficult to provide flexible and effective support in online monitoring of transmission lines, operation and maintenance of unattended terminal stations, and direct collection of massive distributed power supply information. This article proposes an online video monitoring system design based on the on -site programming door array (FPGA) and Ethernet's visible optical communication (VLC) technology. The system combines the high -speed processing capacity of FPGA and the high security and anti -interference of VLC. Through the dual transmission mode, it effectively improves the video monitoring capabilities in harsh environments and emergencies. The system design includes light source selection, control design, signal receiving and demodulation, and data transmission mode, which aims to achieve stable and reliable video data transmission. In normal mode, the system conducts data communication through Ethernet; in special mode, if it encounters a high interference environment or network failure, the system automatically switch to the VLC mode and use LED lights and photoelectric detectors for optical signal transmission. In addition, the system also uses advanced modulation technology, light source drive circuits, synchronization and clock management, environmental light interference management and other technologies to ensure the efficiency and reliability of communication. The design can not only improve the response speed and data processing ability of the monitoring system, but also guarantee the stability and reliability of signal transmission under some harsh field conditions, and escort the logistics maintenance personnel to deal with emergencies.