Viikari Ville, Kokkonen Kimmo, Meltaus Johanna
IEEE Trans Ultrason Ferroelectr Freq Control. 2008 Nov;55(11):2522-6. doi: 10.1109/TUFFC.961.
This correspondence presents an optimized frequency modulated continuous-wave (FMCW) interrogation procedure for reflective delay line-type SAW sensors. In this method, the time delays between reflections are obtained with Fourier transform from optimally windowed frequency response. Optimal window functions maximize the signal-tointerference ratio at chosen temporal points of interest. The method is experimentally verified and its accuracy is compared with that of a Fourier transform from Hamming-windowed frequency response.
本通信提出了一种用于反射式延迟线型声表面波(SAW)传感器的优化调频连续波(FMCW)询问程序。在该方法中,通过对优化加窗频率响应进行傅里叶变换来获得反射之间的时间延迟。最优窗函数在选定的感兴趣时间点最大化信号干扰比。该方法经过实验验证,并将其精度与汉明窗频率响应的傅里叶变换精度进行了比较。