基于单片机的简单数字采集系统设计

文档编号:JD616  文档字数:24505,页数:55

摘    要

数字采集系统简称DAS(Digital Acquisition System),是指将温度、压力、流量、位移等模拟量进行采集、量化转换成数字量后，以便由计算机进行存储、处理、显示或打印的装置。数字采集系统是采集系统中最常见的类型，随着单片机技术的飞速发展，通过单片机对被控对象进行控制日益成为今后的一个重要发展的方向。本次设计主要是完成对特定信号（比如温度，流量等等）模拟量的采集，处理以及显示。
本设计是基于AT89C51单片机来实现一套多参数采集系统。本系统主要完成数据采集的常规功能，信号经过对应的传感器（比如温度信号就用温度传感器），送入放大电路。微弱信号经过放大以后，再经过I 变换，A/D转换电路送入单片机进行数据的处理。经单片机处理以后，送入显示系统进行显示。
在生产过程中，应用这一系统可对生产现场的工艺参数进行采集、监视和记录，为提高产品质量、降低成本提供信息和手段。在科学研究中，应用数据采集系统可获得大量的动态信息，从而成为研究瞬间物理过程的有力工具，也是探索科学奥秘的重要手段之一。

关键词：单片机；数据采集；I 变换；A/D转换电路

A Simple Digital Acquisition System Design Based On MCU
Abstract

Data Acquisition System referred to DAS (Data Acquisition System), refers to the temperature, pressure, flow, displacement, such as simulation of a collection, quantitative converted into digital, so as to provide computer storage, processing, display or print device. Digital Acquisition System Acquisition System is the most common type, with the rapid development of SCM technology, the object through the MCU control has increasingly become an important future development direction. The key is to complete the design of specific signals (such as temperature, flow, etc.) simulation of the collection, processing and display.     Design is based on the AT89C51 SCM to achieve a set of multi-parameter acquisition system. This system is mainly to complete the routine data collection function, the corresponding signal through sensors (such as temperature signal using temperature sensors), into the amplifier. After a weak signal amplification, and then after I / V transformation, A / D converter circuit into the SCM data processing. After dealing with the SCM, into the display system to display it.     In the production process, the system can be applied to the production site of the parameters of the collection, monitoring and recording, to improve product quality, reduce costs to provide information and means. In scientific research and application of data acquisition system will be a lot of dynamic information, thereby becoming an instant physical processes on a powerful tool, is also exploring scientific mysteries of one of the important means.

Key words:MCU；Digital Acquisition；I  transform；A/D converter circuit

目    录

引    言 - 1 -
第1章 绪论 - 2 -
1.1 概述 - 2 -
1.2 课题的总体设计及思路 - 2 -
1.3 各个环节及实现 - 3 -
第2章 硬件电路设计 - 4 -
2.1 单片机主控电路的设计 - 4 -
2.2 数字采集的设计 - 10 -
2.3 显示电路的设计 - 19 -
2.4 键盘接口电路的设计 - 21 -
第3章 软件设计 - 22 -
3.1 主程序流程图 - 22 -
3.2 中断服务程序的设计 - 23 -
3.3 按键扫描流程图 - 23 -
3.4 A/D转换程序 - 24 -
3.5 X5045程序的设计 - 25 -
3.5 显示程序流程图 - 26 -
第4章 调试 - 28 -
4.1 硬件调试 - 28 -
4.2 软件调试 - 28 -
结论与展望 - 29 -
致    谢 - 30 -
参考文献 - 31 -
附录A：总图 - 32 -
附录B：外文文献 - 33 -
附录C：主要参考文献及摘要 - 38 -
附录D：程序清单 - 40 -

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