基于串行口的数据采集系统的设计
摘要：数据采集在日常生活中有着广泛的应用，特别是在一些对数据的准确性，实时性要求比较高的场合，需要设计专用的电路来实现系统的需求，而系统的功能的实现，与我们对元器件的选型，设计搭建的电路有直接的关系，它们直接影响着系统对外界环境的感知和响应能力，决定着系统的性能。
  数据采集在工业控制领域有着广泛的需求，本设计是实现基于串行口的数据采集系统，以采集周围的环境温度为采集对象，以STC89C51单片机作为下位机，以PC机作为上位机，使用9针串口来实现下位机和上位机的通讯。通过在PC机上使用VB6.0开发软件来开发实现数据接收显示控制界面。系统调试结果表明，该系统设计合理，对周边环境温度的变化反应敏感，数据采集的波特率达到9600bps.
关键字：数据采集系统、vb软件开发STC89C51单片机、串口通信、VB
中图分类号：TP2
Design of Data Acquisition System Base on Serial Communication
ABSTRACT: Data collection is widely applied in daily life, especially in the place which is very high request in data accuracy, real time display. A special circuit is need to be designed to realize it. Also, it have much connection with the sensor and circuit design , they  influence the system’s sensor and response ability very much , it directly determined the system’s character.
Nowadays, Data collection is widely requested in the industry control area. The system is designed to realize the data acquisition according to the serial port , collecting the temperature around the environment as collection object , use  STC89C51 single-chip microcomputer as down machine , use personal computer as upper machine , use 9 pin serial port to realize the down SCM and upper PC’s communication . A display control form was made use the VB6.0 software . The experiment have done display that , the design was reasonable , it was very sensitive to the temperature’s change around the environment .The system’s data collection speed could arrived to 9600bps.
   
关键词：data collection system；STC89C51 single-chip microcomputer；serial communication；Visual Basic
中图分类号：TP2
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