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 meteorological characterization of the methods, in terms of systematic and random errors, is achieved, demonstrating the high overall performance. (C) 2001 Elsevier Science Ltd. All rights reserved.
|Titolo:||Digital signal processing techniques for accurate ultrasonic sensor measurement|
|Data di pubblicazione:||2001|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/S0263-2241(00)00059-2|
|Appare nelle tipologie:||1.1 Articolo in rivista|