Based On Wireless Mobile Communication Network And The Internet Network For Remote Data Acquisition And Control System Design

Aiming at the demand for the wireless data transmission using the CDMA 1X/Internet/GPRS public mobile network, the GPRS (General Package Radio System) wireless data transmission terminal is designed, the CDMA 1X/GPRS long-distance data acquisition and control system is established. The design procedure and the application method of the CDMA 1X/GPRS wireless data transmission terminal are introduced in this paper in detail. This paper is divided into several main parts as follow:Firstly, according to the demands for the square-built field wireless channel, the method using the CDMA 1X/GPRS network is selected as the solution for the design of the wireless data transmission system by comparing the characteristics of primary wireless data transmission methods.Secondly, the hardware solution used Q2406B with embedded TCP/IP software protocols is determined by the careful analysis of some GPRS wireless data transmission hardware solutions. And then, based on the particularity of the GPRS wireless data transmission terminal applications, the network topology structure with the GPRS wireless data transmission terminal, which communicates with server with fixed IP, is also selected as the network construct scheme of the GPRS wireless data transmission terminal after comparing with other schemes.Thirdly, GPRS wireless data transmission terminal hardware design method based on AT89C52 CPU is recommended in detail and the main part schematic circuit is given.Fourthly, according to the chosen network structure, GPRS wireless data transmission terminal's software is programmed and the design method also is described. The main software-module flow charts are presented at the end of that chapter.Finally, some problems occurred in the debug procedure and respective solutions are given.The system, changed only a little, can be used to the datd transmission of remote measure and remote control such as vehicle-carried terminal and automatic reading meter.