Title: A real-time acoustic signature-based fluid identification methodology for applications in the field of security and defence

Authors: Shweta Singh; Dipali Bansal

Addresses: Department of EEE, FET, Manav Rachna International University, Faridabad, Haryana, India ' Department of EEE, FET, Manav Rachna International University, Faridabad, Haryana, India

Abstract: Acoustic-based inspection methods, employed for on field screening of containers, hold high importance in the fields of security and defence. However, such methods are limited by expensive instrumentation, offline analysis and complexities related to transducer container physical coupling. Simple, non-destructive and extremely cost effective method based on acoustic resonance has been devised here for rapid online acquisition and analysis of acoustic signatures of fluids for their necessary identification and classification. The research, with two stages of experimentation, establishes reliability of the system in the first stage by using sweep excitation in fluids followed by acquiring acoustic signatures for such fluids in the second stage by using white noise for excitation. The setup uses two ceramic coated piezoelectric transducers interfaced with the computer through audio ports. Excellent consistency in the results, recorded with the help of a virtual spectrum analyzer, is achieved with average error amounting to 1.4%.

Keywords: real-time acquisition; acoustic signatures; acoustic resonance; spectroscopy; piezoelectric sensors; container screening; fluid identification; security inspection; defence; ceramic coatings; piezoelectric transducers.

DOI: 10.1504/IJESMS.2016.079413

International Journal of Engineering Systems Modelling and Simulation, 2016 Vol.8 No.4, pp.273 - 283

Received: 24 Oct 2014
Accepted: 06 Aug 2015
Published online: 28 Sep 2016 *

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