The Research And Design Of Lighting Remote Control System Based On GPRS

Because issues caused by the city lighting control system of energy consumption and energy conservation have become increasingly prominent, It's necessary for us to design a scientific, rational, efficient systems for the management and control of lighting. After characteristics of traditional lighting control system is researched, remote control lighting system based on the GPRS technology is presented, whose criterion is construction of network, security of communication and monitoring nodes of system. The main work of this dissertation are as follows:The protocol model of GPRS technology is analyzed at first, compared with the GSM, conclude the GPRS advantages. And overall scheme of the remote lighting control system is designed. That's to say, monitor terminal, communication network and monitoring center.Access security mechanism of the GPRS network discussed ,whose security flaws are pointed out. GPRS data transmission encryption algorithm is researched, combined with the remote control lighting system features , two key 3DES algorithm are brought forward.Hardware platform of the remote lighting control system is designed based on the P89C669 microprocessor controller. And other circuits, such as power supply, communication model, the output control, LCD display and signal sample.The monitor terminal software is completed, using a modular design principle, namely: system initialization, Human-machine interface, analog signal processing, order enforcement and GPRS communication, and so on. The AT commands and PPP protocol are analyzed in detail, completed the data transmission between SCM and CMS91 model.Based on the analysis of socket programming principles, CSocket is chosen to design the monitoring center. According to client-server network communications mode, the overall scheme of monitoring center is designed and the software architecture and models are further illuminated in detail.