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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 In 8th European Workshop on Structural Health Monitoring, EWSHM 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.

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author
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
in
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
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
2017-04-24 14:38:50
@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},
  keyword      = {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},
}