基于Labwindows/CVI数据采集系统上位机软件的设计

PC Software Design of Data Acquisition System Based on Labwindows/CVI

摘要:

为了能够完成大量多路信号的现场实时采集处理,对数据采集系统的上位机软件进行了设计,在Labwindows/CVI软件开发平台下,设计了人机交互界面,编写了背后实现程序代码以及USB总线通信函数动态库,实现了对多种环境和状态参数的采集和分析;文章重点介绍了为实现多种测试功能而采用的多线程、动态链接库关键技术,给出了功能测试结果,输入正弦波信号用上位机软件画图功能还原,结果波形光滑无毛刺,电压值误差很小;该软件性能稳定,满足实际需求。

Abstract:

For processing a lot of multi-channel signal in real time, PC software of data acquisition system has been designed. In Labwindows/CVI software development platform, designed a human-machine interface, written behind the realization of the program code and USB bus communication function dynamic library, the whole design has realized the acquisition and analysis of multiple environments and state parameters. In this paper, Multithreads technology and Dynamic Link Library technology were introduced specifically, that were used for achieving a variety of testing capabilities, and finally functional test results are given. Input sine wave signal and use PC software drawing functions to restore, the results show waveform is smooth and voltage error is small, the software has stabilized performance, meeting the actual needs.