Optimized signal processing for FMCW interrogated reflective delay line-type SAW sensors

Author

Viikari, Ville ; Kokkonen, Kimmo ; Meltaus, Johanna

Author_Institution

VTT Tech. Res. Centre of Finland, Espoo

Volume

55

Issue

11

fYear

2008

fDate

11/1/2008 12:00:00 AM

Firstpage

2522

Lastpage

2526

Abstract

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-to-interference 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.

Keywords

Fourier transforms; acoustic signal processing; frequency response; surface acoustic wave delay lines; surface acoustic wave sensors; FMCW interrogated reflective delay line-type SAW sensors; Fourier transform; Hamming-windowed frequency response; optimal window functions; optimally windowed frequency response; optimized frequency modulated continuous-wave interrogation procedure; optimized signal processing; signal-to-interference ratio; time delays; Acoustic sensors; Bandwidth; Delay lines; Frequency; Pulse circuits; Pulse modulation; Signal processing; Signal resolution; Surface acoustic waves; Wireless sensor networks; Acoustics; Algorithms; Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Fourier Analysis; Quality Control; Reproducibility of Results; Sensitivity and Specificity; Signal Processing, Computer-Assisted; Time Factors; Transducers;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/TUFFC.961

Filename

4686885