Abstract
The echo signal in SAW sensing take on character with instantaneousness, intermediate frequency and narrowband. The frequency extraction by the tradition FFT analytical method is restricted with the signal sampling length, which can't fit precision in SAW sensing. By analyzing the theory of SAW resonator and the character of echo signal, use digital down conversion(DDC) to decrease the frequency of echo signal. Then acquire the frequency by curve fitting. By comparison different method of frequency extraction, the effective of this method was validated.
| Original language | English |
|---|---|
| Pages (from-to) | 131-135 |
| Number of pages | 5 |
| Journal | Beijing Huagong Daxue Xuebao (Ziran Kexueban)/Journal of Beijing University of Chemical Technology (Natural Science Edition) |
| Volume | 37 |
| Issue number | 6 |
| Publication status | Published - Nov 2010 |
Keywords
- Curve fitting
- DDC
- Resonant frequency acquired
- SAW echo signal processing