Digital signal processing techniques for obtaining high accuracy in ultrasonic distance measurements are presented. The proposed methodologies employ a suitable time-frequency representation (Wavelet Transform or Short Time Fourier Transform) to extract the envelope of the reflected pulse echo, together with a suitable pulse detection algorithm (threshold or correlation) for time-of-flight estimation. A complete metrological characterization of the methods, in terms of systematic and random errors, is achieved, demonstrating the high overall performance.
Digital methods for very accurate ultrasonic sensor measurements / Andria, Gregorio; Attivissimo, Filippo; Giaquinto, Nicola. - STAMPA. - (1999), pp. 1687-1692. (Intervento presentato al convegno 16th IEEE Instrumentation and Measurement Technology Conference, 1999. IMTC/99 tenutosi a Venezia, Italy nel May 24-26, 1999) [10.1109/IMTC.1999.776110].
Digital methods for very accurate ultrasonic sensor measurements
ANDRIA, Gregorio;ATTIVISSIMO, Filippo;GIAQUINTO, Nicola
1999-01-01
Abstract
Digital signal processing techniques for obtaining high accuracy in ultrasonic distance measurements are presented. The proposed methodologies employ a suitable time-frequency representation (Wavelet Transform or Short Time Fourier Transform) to extract the envelope of the reflected pulse echo, together with a suitable pulse detection algorithm (threshold or correlation) for time-of-flight estimation. A complete metrological characterization of the methods, in terms of systematic and random errors, is achieved, demonstrating the high overall performance.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
