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引言现今工程技术领域中,运用虚拟仪器来采集和分析信号已成为主流。通常数据采集系统通过串行口、并行口或内部总线等与计算机相连。但是它们都安装不方便,灵活性受限。USB总线具有通用、高速、支持热拔插等优点,很好地解决上述问题,非常适合在数据采集中应用。本文设计了一套针对虚拟仪器的数据采集系统,运用单片机控制数据的采集,通过USB接口与上位机PC进行通信,完成数据的传输。
INTRODUCTION In the field of engineering technology today, the use of virtual instruments to collect and analyze signals has become the mainstream. Usually data acquisition system through the serial port, parallel port or internal bus connected to the computer. But they are all inconvenient to install and have limited flexibility. USB bus has a common, high-speed, hot-swappable support, etc., a good solution to the above problems, ideal for data acquisition applications. This paper designed a set of data acquisition system for virtual instruments, the use of SCM control data acquisition, through the USB interface to communicate with the host PC to complete the data transmission.