文档介绍：摘要随着信息领域各种技术的发展, 在数据采集方面的技术也取得了长足的进步, 采集数据的信息化是目前社会的发展主流方向。各种领域都用到了数据采集,在石油勘探、地震数据采集领域已经得到应用。随着测控技术的迅猛发展, 以嵌入式计算机为核心的数据采集系统己经在测控领域中占到了统治地位。数据采集系统是将现场采集到的数据进行处理、传输、显示、存储等操作。数据采集系统的主要功能是把模拟信号变成数字信号, 并进行分析、处理、存储和显示。国内大大小小很多公司多开发了数据采集器和卡之类的产品, 这使信息的数字化提供了极大的方便。本次毕业设计课题, 数据采集器制作, 是利用 ATMEL 公司的 89C5 1 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 Abstract Along with the development of information field various technologie s, the technology in the aspect of data collection has also gotten rapid a dvance, gather the informative process of data is now society develop th e direction of main stream. Various fields have used data collection, inp etroleum exploration and seismic data collection field have gotten applic ation. As measuring to control technical swift development, with embedded co mputer for key data collection system Jig go through in measure to cont rol field in have taken dominance position. Data collection system is toc arry out the data that the collection on-the-spot goes to to handle, trans mits and shows, stock etc. operation. The major function of data collecti on system is simulated signal e digital signal, and analyses handl ing, stock and show. Domestic size panies have developed da ta 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 collection ware produce is the only flat machine of 89 C51 that uses pany of ATMEL with AD0809 ch ip do a collection simulated voltage signal, conversion number word sig nal passes string mouth again by only flat machine to dispatch to the ha ndling of puter, additionally, 3 number pipe L ED ’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 数据采集系统的基本原理 数据采集系统的分类 数据采集系统的基本功能 数据采集系统的结构形式 数据采集系统设计的原则 数据采集系统的发展趋势 2 系统功能的介绍 方案的论证 .1 模数转换的选择 2