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Acoustic data communication by wireless sensor network on plate-like structures for autonomous structural health monitoring of aerovehicles
Author(s): Tonmo V. Fepeussi; Yuanwei Jin; Yang Xu; Dan Xiang; Feng Huo
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Paper Abstract

Autonomous structural health monitoring (SHM) of aerostructures strengthens the reliability, increases the lifetime, and reduces the maintenance cost of aerovehicles such as airplanes and unmanned aerial vehicles (UAV). The continuous monitoring of aerostructures for early damage detection and identification is made possible through a wireless network of sensors deployed on the structure. Usually, the data collected by these sensors is communicated to a central unit for real-time data processing using electromagnetic waves at radio frequencies (RF). However, the emission of RF signals for autonomous SHM creates additional sources of interference to on-board RF communication systems used for aircraft control and safety-related services. To overcome this issue, we propose in this paper an acoustic data communication system for autonomous health monitoring of aerostructures which are modeled as thin plate-like structures. In the proposed system, both damage detection and wireless communication are performed using guided elastic waves. Data communication across an elastic channel is challenging because of the severe frequency-dispersive and multimodal propagation in solid media which distorts, delays, and greatly attenuates the transmitted data signals. To cope with this problem, we introduce a sensor network based on time-reversal pulse position modulation that compensates for channel dispersion and improves the signal-to-noise ratio of the communication link without relying on sophisticated channel estimation algorithms. We demonstrate the viability of the presented system by conducting experiments on an homogeneous and isotropic aluminum plate specimen using Lead Zirconate Titanate (PZT) sensor discs at a resonant frequency of 300 kHz.

Paper Details

Date Published: 3 May 2018
PDF: 14 pages
Proc. SPIE 10643, Autonomous Systems: Sensors, Vehicles, Security, and the Internet of Everything, 106430J (3 May 2018); doi: 10.1117/12.2305021
Show Author Affiliations
Tonmo V. Fepeussi, Univ. of Maryland Eastern Shore (United States)
Illinois Institute of Technology (United States)
Yuanwei Jin, Univ. of Maryland Eastern Shore (United States)
Yang Xu, Illinois Institute of Technology (United States)
Dan Xiang, X-wave Innovations, Inc. (United States)
Feng Huo, X-wave Innovations, Inc. (United States)


Published in SPIE Proceedings Vol. 10643:
Autonomous Systems: Sensors, Vehicles, Security, and the Internet of Everything
Michael C. Dudzik; Jennifer C. Ricklin, Editor(s)

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