声表面波谐振器无源无线传感虚拟仪器系统

Virtual instrumentation system for wireless sensing using passive SAW resonator

分析了在通用硬件平台上结合软件设计的声表面波谐振器无源无线传感虚拟仪器系统。该系统通过设计虚拟仪器实现部分硬件功能,控制闭环系统实现自动检测,并采用数字信号处理方法提高检测系统的精度,从而避免了通常的复杂硬件系统,降低硬件成本,并使检测更灵活。本文介绍了设计原理和系统构成,并对系统的误差进行了分析。实验表明:该仪器系统能够达到5m的无线检测距离。

A virtual instrumentation system for wireless sensing using passive surface acoustic wave sensors is presented.It is designed in light of software on common hardware platform.The complexity and cost of the system construction can be reduced by designing software to replace part of the hardware.At the same time,the method of digital signal processing is adopted to improve the accuracy of detection system.Automatic measurement can be implemented through a feedback-control,which is flexible.Results of experiments show that a 5m wireless detecting distance can be achieved.