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Title: A coatable, lightweight nanocomposite sensor for in-situ acquisition of ultrasonic waves and its application to embeddable structural health monitoring
Authors: Liu, M 
Zeng, Z 
Xu, H 
Su, Z 
Zhou, L 
Zhang, Z
Keywords: Coating
Guided ultrasonic wave (GUW)
Nanocomposite sensor
Sensor network
Structural health monitoring (SHM)
Issue Date: 2016
Source: 8th European Workshop on Structural Health Monitoring, EWSHM 2016, 5-8 July 2016, Spain, Bilbao, p. 1-9 How to cite?
Abstract: Lightweight and resilient, a nano-engineered sensor was developed, coatable to engineering structures via a screen printing approach, for in-situ acquisition of ultrasonic waves for implementing guided ultrasonic wave (GUW)-based structural health monitoring (SHM). Carbon black (CB)/polyvinylidene fluoride (PVDF)-based hybrid with various degrees of percolation were prepared, to fabricate the sensor. In an ultrasonic regime, GUW modulates the infrastructure of formed conductivity network of CB nanofillers with introduction of tunneling effect, and consequently changes the piezoresistivity manifested by the sensor. Morphological characterization, and static/dynamic electro-mechanical response tests were conducted to ascertain an optimal percolation threshold of the conductivity network. At the optimal threshold (∼ 6.5 wt%), the sensor exhibits high-fidelity, fast-response, and highsensitivity to GUWs up to 400 kHz. Addressing an innovative sensing philosophy of "quasidispersed sensing", the sensor presents a potential to strike a compromise between "sensing cost" and "sensing effectiveness", well accommodating the needs from GUW-based SHM.
ISBN: 9781510827936
Rights: All rights reserved. No part of the contents of these proceedings may be reproduced or transmitted in any form, or by any means, without written permission from the Publisher, or the authors.
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Appears in Collections:Conference Paper

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