Abstract
Most of the ultrasonic distance measurements are based on the determination of the Time of flight. Digital signal processing techniques for obtaining high accuracy in ultrasonic distance measurements are presented in this paper. The proposed method employs a Wavelet Transform or Short Time Fourier Transform to extract the envelope of the reflected pulse echo, together with a Cross-correlation pulse detection algorithm for Time of flight estimation. The simulated system consists of five elements transducer array as both transmitter and receiver. The transducer array is formed by aligning the transducers with minimum spacing between elements of 2 wavelengths. The results show the accuracy with the theoretical value. The simulation for the above said application has been implemented using LabVIEW (Laboratory virtual instrument engineering workbench) developed by National Instrument, is a graphical Programming environment suited for high-level or system level design. Advantage of this approach is the flexibility and very rapid development time offered by this graphical programming software.
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Naik, A., Panse, M.S. (2011). Simulation of Ultrasonic Phased Array Sensors for Time of Flight Measurements. In: Das, V.V., Stephen, J., Chaba, Y. (eds) Computer Networks and Information Technologies. CNC 2011. Communications in Computer and Information Science, vol 142. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-19542-6_80
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DOI: https://doi.org/10.1007/978-3-642-19542-6_80
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-19541-9
Online ISBN: 978-3-642-19542-6
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