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通信電子]基于gprs遠(yuǎn)程監(jiān)控系統(tǒng)數(shù)據(jù)終端的研究外文資料翻譯-展示頁

2024-11-26 07:44本頁面
  

【正文】 Center Equipment System structure GPRS data terminal hardware modular design, include the dataprocessing module, remote munication module. analogdigital conversion module and display module, the system structure is shown in figure 2. Data processing module contains AT89C55[3], X25045 two chips, AT89C55 for dealing with longrange munication modules, analog / digital converter module and the module data transmission. To ensure that data will not be lost restart. Serial E2PROM X25045 device used for data storage. Remote Communication module includes GPRS module and SIM Serial Module MAX3238 three parts. SIEMENS GPRS wireless module using the MC35[4]GPRS module Its function is to connect the data with an antenna or through an order to launch, the data transmission or reception Remote Monitoring Center. to receive further information or to order corresponding to the agreement, sent through MAX3238 single chip processor, MX3238 starting level conversion and serial munication function Due to the absorption method is the GPRS work, data transmission, it is indispensable to the SIM. function is to store data in a safe condition and plete customer information and customer identification authentication encryption algorithm as a whole. Analogdigital conversion module of the analog signal processing functions will be converted to digital, microprocessor as information sources AD0832 chip circuit design using the chip as the analogdigital conversion. AD0832 first converted into analog signals into digital, and then sent T89C55 chips and handling. When the module is mainly on account management staff to inspect the scene, they ADO8032 E2PROM X25045 CPU MODULE AT89C55 Serial Interface module Show module Communication terminals hardware can facilitate realtime understanding of the situation. management system using a special keyboard and LED display, intelligent control HD7279A. HD7279A processor uses serial interface, the interface circuit and the external circuit simple. I occupied lines, only 4, with low cost and high performance. Terminal Software Design Data terminals must possess the following basic functions : automatic download the GPRS work. Automatic data centers to the SIM IMSI and its dynamic IP address for data transmission. Serial Driver Data terminal is due to the MCU. Serial munication must begin from the bottom GPRS download and eventually achieve data transmission. Serial opened Serial Driver (Open Comm) closed Serial (Close Comm) Reading serial data (Read Comm), wrote to the serial dat
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