基于USB总线的多点数据采集系统的设计

Design of Multi-point data acquisition system based on USB bus

利用FT245BL芯片实现了笔记本电脑通过通用串行总线对RS485现场总线上的多点数据采集,并通过MFC编写的上位机把采集到的数据实时处理后用波形图直观表现出来便于进行分析。详细介绍了该多点采集系统各个部分的设计,包括硬件电路和上位机软件的设计。然后,通过采集RS485现场总线上的两个节点的开发板的数据来模拟RS485现场总线上传感器发送的数据并在上位机上通过波形显示出来,成功的验证了系统的可行性。

By means of FT245BL, this paper achieves multi-point data acquisition on RS485 fieldbus through using notebook PC by Universal Serial Bus and using waveform graph directly express real-time processing data to analysis easily by host-computer writing with MFC. Detail the composition of the various parts of the system, including hardware circuit and host-computer software design. Then through collecting the data of development boards on both nodes on the RS485 fieldbus to simulate the sensor on RS485 fieldbus and show the waveform by host-computer . Finally,checking the feasibility of the system successfully.