基于声卡的信号采集技术

Signal Acquisition Technology Based on Soundcard

声卡作为数据采集卡具有价格低廉、开发容易和系统灵活等优点,在给出系统结构的基础上,分析了系统硬件和软件设计技术,对普通软件开发工具、MATLAB和虚拟仪器等三类软件开发工具进行了分析和比较,得出LabVIEW是声卡信号采集系统软件开发工具的首选,并给出一个基于LabVIEW的软件设计实例。实际应用表明:基于声卡的,尤其是声卡与虚拟仪器相结合的信号采集技术具有广阔前景。

Soundcard as a DAQ card has low-price, easy-developing and flexible-system such virtues. The design technologies of hard- ware and software were analyzed after system structure was proposed. Based on the analysis and comparison with three types of software development tools：ordinary software development tools, MATLAB and VI （Virtual Instrument ）, can find that LabVIEW is the preferred software developing tool for this system. A software design case with LabVIEW is present then. Through actual applications, it＇ s shown that the signal acquisition technology based on soundcard,especially combining with VI has broad prospects.