The Research And Application Of Wireless Remote Monitoring System Based On Embedded Linux System And GPRS

The development of Radio monitoring and controlling system is based on wireless data transmission technology. It makes it easy for people to monitor and control remote systems. GPRS provides a new data transmission mode for wireless monitoring and controlling systems. Compared to traditional data transmission modes, the GPRS based data transmission mode is long-distance, high speed, good real-time and large capacity.As a new kind of data transmission technology, GPRS (General Packet Radio Service) is developed from the current GSM digital mobile communication system. With the combination of radio technology and IP technology, GPRS constructs a mobile IP networks. It can implement no-gap link with highly developed fix IP networks, using packet switch technology to transmit all kind of data such as data, audio and picture.With computer technology applying to the electronic products gradually, the embedded system becomes a new technical focus and development trend in IT field following computer network technology. Meanwhile, the wide embedded applications call for better performance and functionality of embedded system. The 32-bit embedded RISC microprocessors provided by ARM having high performance together with low power consumption and system cost, is used more and more widely.μClinux is derived from Linux and inherits lots of virtues of Linux such as open source, it has special implements in the case of no MMU and supports wide range processors and many drivers.At first, it is discussed that present situation, future development and study significance of remote monitoring system. After the introduction of GPRS, TCP/IP and PPP, the design scheme of remote monitoring system based on GPRS is given, including system structure and function, remote terminal unit structure, communication protocols and GPRS link process. Then, given its application in wireless remote monitoring system for street lamps management, the system detailed implementation is described, including the hardware and software design in remote terminal unit. The command packets transmitted between monitoring center and remote terminal unit, the remote terminal unit data-gathering process and the data transmitting flow through the whole system are also described in detail. Lastly, according to the communication feature of GPRS and the demand of remote monitoring system for street lamps, the scheme for GPRS access to Internet was discussed in monitoring center, and the thesis put forward the realization of monitoring center software system as a whole.In the finality, the work summaries of whole thesis are given and the problems requiring further studies are discussed in brief.