1、 I 摘要 面对大量的数据， 人工处理已远远无法满足时代的要求， 依靠微电子技术来实现数 据的采集、存储和显示，成为适应时代步伐的唯一有效捷径。本系统采用模数转换、微 处理器、存储器等芯片来实现 8 路数据的采集，将采集的信号进行存储，按时间上传到 上位机 PC，通过不同模式的选择进行数据采集、查询、打印和显示等。在文中较系统的 介绍了从模拟信号到数字信号的转换过程和讨论了转换过程中的技术参数等问题，并进 行了系统存在的一些误差分析。 数据采集系统分为数据采集部分和显示控制部分。数据采集部分主要负责数据的采 集，将从调理电路送过来的信号进行量化，把模拟量变成数字量。显示部分主要是把采 集来的数
2、据进行显示，并控制各通道数据采集的次序，它采用 8279 作为键盘显示接口 器件，用硬件完成对显示器和键盘的扫描，用开关矩阵控制各通道数据采集的次序，用 LED 进行数据的显示。 关键词关键词：单片机，数据采集，查询，上位机通信 II ABSTRACT The face of large amounts of data, manual processing far can not meet the requirements of the times, relying on micro-electronics technology to achieve data acquisition, sto
3、rage and display, as the pace of the times the only effective shortcut. The system uses analog-digital conversion, microprocessor, memory and other chips to achieve the 8-channel data acquisition, storage signals will be collected by time uploaded to the host computer PC, by the choice of different
4、modes of data capture, query, print and display, etc In the paper a more systematic introduction of the analog signals to digital signals from the conversion process and discuss the technical parameters of the conversion process and other issues, in the end, we also conducted a systematic analysis of the existence of a number of errors. Data acquisition system is divided into the data collection and display control section. The data collection is mainly responsible for data collection, sent ov
