2、单片机和AD0809芯片做一个采集模拟电压信号，转换为数字信号，再由单片机经过串口发送给PC机处理，另外三个数码管LED显示采集的数字信息。关键字：单片机、数据采集、信号处理、AD0809芯片AbstractAlong with the development of information field various technologies, the technology in the aspect of data collection has also gotten rapid advance, gather the informative process o
3、f data is now society develop the direction of main stream. Various fields have used data collection, in petroleum exploration and seismic data collection field have gotten application. As measuring to control technical swift development, with embedded computer for key data collection
4、 system Jig go through in measure to control field in have taken dominance position. Data collection system is to carry out the data that the collection on-the-spot goes to to handle, transmits and shows, stock etc. operation. The major function of data collection system is simulated
5、signal become digital signal, and analyses handling, stock and show. Domestic size many companies have developed data collection ware and the product that blocks and so on, this makes the digitization of information have offered maximum convenience. This graduated design program, data
6、 collection ware produce is the only flat machine of 89 C51 that uses the company of ATMEL with AD0809 chip do a collection simulated voltage signal, conversion number word signal passes string mouth again by only flat machine to dispatch to the handling of personal computer, addition
7、ally, 3 number pipe LED’s show the digital information of collection. Keyword: Only flat machine、Data is gathered、Handle目录摘要关键字前言1数据采集系统的基本介绍1.1数据采集系统的基本原理1.2数据采集系统的分类1.3数据采集系统的基本功能1.4数据采集系统的结构形式1.5数据采集系统设计的原则1.6数据采集系统的发展趋势2系统功能的介绍2.1方案的论证2.1．1模数转换的选择2．12.87C51的选择2．1.3.显示电路2．1.4.电压/频率
