Research On Wireless Remote Monitoring System Based On Embedded Liunx

With the development of society, the level of scientific progress, the degree of automation in China being increasing, the enterprise's complex production being processing, the production process data is also growing. Some of these data is distributing in Scattered and unattended harsh environment. The traditional data gather such as cable transmission, short-range wireless communications network is no longer suitable for this situation. At this time, wireless remote data control bases on embedded systems and mobile communication technologies becomes into a new solution.First, this paper expounds the background of advancing the study object. Then it analyzed and researched GPRS network features, and puts forward wireless data transmission using by GPRS technology. Then it put forward a design. The system can be divided into three parts; the first part is upper computer, the second part is embedded GPRS communication terminal; the third part is data gather modules devices. The data gather devices put on the field; the embedded GPRS communication terminal device puts the data of the data gather devices onto the internet. You can control the data of the field using PC who is online in the control room.This paper in the third chapter and fourth chapter describes the hardware and software design methods of the embedded GPRS communication terminal device. In the hardware the embeddd GPRS communication terminal device uses Samsung's S3C2410 for ARM9 processor as the core, using MC39I of SIMENSE as GPRS module. In the software the embeddd GPRS communication terminal device uses embedded Linux as its operation system, transplanting PPP protocol as data link layer protocol, embedding UDP protocol as transport layer protocol. On the basis, the author developes driver programs, graphical interface programs and application programs. In the end, by visiting the GPRS wireless network, the embeddd GPRS communication terminal device can transmit the data in the field and realize wireless internet.This paper in the fifth chapter introduces the data gather devices, and there are three types of data gather devices modules: analog input, analog output, switching of input and output. in order to save costs, the gather devices who are close share a the embeddd GPRS communication terminal device in the field, the embeddd GPRS communication terminal device communications with many gather devices by RS485 bus mode, using Modbus protocol who is one master multi-slaves protocol, the embeddd GPRS communication terminal device as a host, the data gather devices as a slave, each board data gather devices have addresses, in order to facilitate the on-site Modbus network configuration, using infrared communication to set the plate address for every data gather devices.In the end of this paper, the author sum up the work of the paper, point out some problem of wireless remote control system based on embedded Linux needing to be optimized and the developing direction in the future.