Novel S-transform information fusion for filtering ultrasonic pulse-echo signals

• Autorzy: Kubinyi M. , Kreibich O. , Neuzil J. , Smid R.

Warianty tytułu

PL

Nowa metoda filtrowania sygnału ultradźwiękowego bazująca na transformacie S i fuzji informacji

• Języki publikacji: EN

Abstrakty

EN

Direct evaluation of ultrasonic signals requires data analyses with an acceptable level of noise. Ultrasonic signals represent a specific category of time domain signals to be analyzed. In order to increase a difference between the level of noise and the amplitude of the ultrasonic pulse a suitable method for signal filtering has to be used. Within this article we discuss and evaluate a novel signal denoising method. The S-transform for signal analysis and processing was used. This transformation has been recently introduced for ultrasonic echo analyses. Proposed transformation represents an intermediate stage between the Fourier transform analysis and the wavelet transform analysis. In order to filter ultrasonic signals from the Electromagnetic Acoustic Transducer (EMAT) with a high level of noise, new, different approach in signal filtering was developed based on an information fusion. Suggested method is able to process the pulse-echo signal in its full complexity. Proposed method offers good results in studied ultrasonic signals in comparison to digital filter or wavelet denoising.

PL

Bezpośrednia ocean sygnału ultradźwiękowego wymaga analizy danych obciążonych szumami. W celu zwiększenia różnicy między amplitudą sygnału a szumami użyto specjalnej metody filtrowania. Zastosowano transformatę S do analizy ultradźwiękowego sygnału echa. Tego typu transformata jest metodą pośrednia między transformatą Fouriera a transformatą falkową. Użyto nowej metody bazującej na fuzji informacji. Testy potwierdziły że nowa metoda może być skuteczniejsza niż filtrowanie cyfrowe czy odszumianie falkowe.

Słowa kluczowe

EN

EMAT; ultrasonic signal; correlation; pulse-echo; signal filtering; information fusion

PL

sygnał ultradźwiękowy; filtrowanie sygnału

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2011
• Tom: R. 87, nr 1
• Strony: 290--295
• Opis fizyczny: Bibliogr. 24 poz., rys.

Twórcy

autor

Kubinyi M.

autor

Kreibich O.

autor

Neuzil J.

autor

Smid R.

• Aeronautical Systems, Instrumentation, Diagnostics, Nondestructive Testing and Signal Processing laboratory, Department of measurement, Czech Technical University, Faculty of Electrical Engineering, Technicka 2,166 27, Prague,

Bibliografia

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