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Narrow-band diffuse ultrasonic wavefield measurements in a network of reciprocal transducers for monitoring of a large concrete floor slab

Fröjd, Patrik LU and Ulriksen, Peter LU (2016) European Workshop on Structural Health Monitoring, 2016 1. p.347-356
Abstract

Piezoelectric transducers were attached in a grid on the surface of an 8 x 2 x 0.08 m concrete floor slab. Through an automated, iterative scheme these were used to transmit and receive 50 kHz, continuous, sinusoidal signals, which were sampled by a multi-channel lock-in amplifier. The measured amplitude and phase were used to locate inflicted damage by detecting deviations from baseline measurements, acquired in a reference state. Superficial damage, in the range of centimeter, could easily be detected, even between the transducers placed the furthest apart, and could be located to a grid coordinate on the floor slab.

Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Continuous wave, Diffuse field, Lock-in amplifier, Structural health monitoring, Ultrasound
host publication
8th European Workshop on Structural Health Monitoring, EWSHM 2016
volume
1
pages
10 pages
publisher
NDT.net
conference name
European Workshop on Structural Health Monitoring, 2016
conference location
Bilbao, Spain
conference dates
2016-07-05 - 2016-07-08
external identifiers
  • scopus:84994802346
ISBN
9781510827936
language
English
LU publication?
yes
id
996002d6-67c0-4536-9f0e-12b6988661fe
date added to LUP
2017-04-24 14:38:50
date last changed
2022-01-30 19:45:47
@inproceedings{996002d6-67c0-4536-9f0e-12b6988661fe,
  abstract     = {{<p>Piezoelectric transducers were attached in a grid on the surface of an 8 x 2 x 0.08 m concrete floor slab. Through an automated, iterative scheme these were used to transmit and receive 50 kHz, continuous, sinusoidal signals, which were sampled by a multi-channel lock-in amplifier. The measured amplitude and phase were used to locate inflicted damage by detecting deviations from baseline measurements, acquired in a reference state. Superficial damage, in the range of centimeter, could easily be detected, even between the transducers placed the furthest apart, and could be located to a grid coordinate on the floor slab.</p>}},
  author       = {{Fröjd, Patrik and Ulriksen, Peter}},
  booktitle    = {{8th European Workshop on Structural Health Monitoring, EWSHM 2016}},
  isbn         = {{9781510827936}},
  keywords     = {{Continuous wave; Diffuse field; Lock-in amplifier; Structural health monitoring; Ultrasound}},
  language     = {{eng}},
  pages        = {{347--356}},
  publisher    = {{NDT.net}},
  title        = {{Narrow-band diffuse ultrasonic wavefield measurements in a network of reciprocal transducers for monitoring of a large concrete floor slab}},
  volume       = {{1}},
  year         = {{2016}},
}