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Design and performance validation of a compact wireless ultrasonic device for localized damage detection

Design and performance validation of a compact wireless ultrasonic device for localized damage... Recent years have seen growing adoption of wireless structural sensor nodes that can significantly reduce the cost and installation effort of a structural health monitoring system. While previous wireless sensor development has mainly focused upon dynamic and vibration measurements at lower frequency domains, in this study, a new wireless ultrasonic sensing node capable of megahertz excitation and sampling is proposed. In addition to presenting the design of the wireless ultrasonic sensing node, experimental notch test and fatigue test of a dog-bone specimen are described in this article. The experimental results demonstrate that the ultrasonic characteristics of surface cracks can be identified in both scenarios with the proposed wireless sensor node. Furthermore, a signal processing procedure is proposed to obtain an accurate estimation of the ultrasonic signal amplitude, which can be a key indicator for crack identification. The procedure involves signal reconstruction with the cardinal sine function and envelope detection using discrete Hilbert transform. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advances in Structural Engineering SAGE

Design and performance validation of a compact wireless ultrasonic device for localized damage detection

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References (41)

Publisher
SAGE
Copyright
© The Author(s) 2016
ISSN
1369-4332
eISSN
2048-4011
DOI
10.1177/1369433215624597
Publisher site
See Article on Publisher Site

Abstract

Recent years have seen growing adoption of wireless structural sensor nodes that can significantly reduce the cost and installation effort of a structural health monitoring system. While previous wireless sensor development has mainly focused upon dynamic and vibration measurements at lower frequency domains, in this study, a new wireless ultrasonic sensing node capable of megahertz excitation and sampling is proposed. In addition to presenting the design of the wireless ultrasonic sensing node, experimental notch test and fatigue test of a dog-bone specimen are described in this article. The experimental results demonstrate that the ultrasonic characteristics of surface cracks can be identified in both scenarios with the proposed wireless sensor node. Furthermore, a signal processing procedure is proposed to obtain an accurate estimation of the ultrasonic signal amplitude, which can be a key indicator for crack identification. The procedure involves signal reconstruction with the cardinal sine function and envelope detection using discrete Hilbert transform.

Journal

Advances in Structural EngineeringSAGE

Published: Feb 1, 2016

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