多路数据采集系统的设计

电子机电论文编号:JD122   字数:13526,页数:60

目 录
摘 要 ...........................................................................- 2 -
ABSTRACT ........................................................................- 3 -
前 言........................................................................... - 4 -
第1章 任务分析与方案确定 ........................................................- 6 -
1.1 信号采集分析 ................................................................- 6 -
1.1.1 信号采集 ..................................................................- 7 -
1.1.2 A/D转换器的选取........................................................... - 9 -
1.2 控制与显示方法分析.......................................................... - 10 -
1.2.1 单片机系统分析............................................................ - 10 -
1.2.2 显示与键盘分析............................................................ - 12 -
1.3 传输方式分析................................................................ - 14 -
第2章 系统硬件设计.............................................................. - 16 -
2.1 信号调理电路................................................................ - 16 -
2.2 数据采集电路................................................................ - 16 -
2.2.1 A/D转换的一般步骤......................................................... - 16 -
2.2.2 ADC0809内部功能与引脚介绍................................................. - 17 -
2.2.3 ADC0809与MCS-51系列单片机的接口方法 .......................................- 19 -
2.4 控制器、振荡源和复位电路.................................................... - 22 -
2.5 键盘与显示电路.............................................................. - 23 -
2.6 通信电路 ....................................................................- 24 -
第3章 软件设计 ..................................................................- 27 -
3.1 A/D转换 .....................................................................- 28 -
3.2 标度变换.................................................................... - 30 -
3.3 数制转换.................................................................... - 31 -
3.4 键盘程序.................................................................... - 33 -
3.5 LED显示程序................................................................. - 34 -
3.6 通信程序.................................................................... - 35 -
3.6.1 上位机程序 ................................................................- 35 -
3.6.2 下位机程序................................................................ - 38 -
结论、讨论和建议................................................................ - 40 -
致 谢........................................................................... - 43 -
参考文献 ........................................................................- 44 -
附录............................................................................ - 46 -

摘 要

以ADC0809和8051为核心，该系统有三个部分：数据采集，数据处理和显示，终端接收。具体包括控制、显示、A/D转换器、电平转换接口、个人计算机等。设计中用ADC0809进行8路数据的采样，利用MCS-51单片机的串行口发送和接收数据。显示部分由8155、75452、7407和LED数码显示器构成。硬件设计应用电子设计自动化工具，软件设计采用模块化编程方法。

关键字：数据采集，EDA，串行口，模块化编程

ABSTRACT

Take ADC0809 and 8051 as the cores, this system has three parts: Data acquisition, data processing and demonstration, terminal receive. Includes the control, the demonstration, a/D switch, the level switch connection, the personal computer specifically and so on. In the design carries on 8 groups data with ADC0809 the sampling, uses the MCS-51 monolithic integrated circuit's serial port transmission and the receive data. Demonstrated that the part by 8155, 75452, 7407 and the LED numerical code monitor constitutes. The hardware design application electron design automation tool, the software design uses the modular programming method. key words: The data acquisition, EDA, the serial port, the modulation programs