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Enhanced impact Echo frequency peak by time domain summation of signals with different source receiver spacing

Ryden, Nils LU (2016) In Smart Structures and Systems 17(1). p.59-72
Abstract

The Impact Echo method can be used to measure the thickness of concrete plate like structures. Measurements are based on the identification of a clear thickness resonance frequency which can be difficult in very thick or highly attenuative plates. In this study the detectability of the measured resonant frequency is enhanced by time domain summation of signals with different source receiver spacing. The proposed method is based on the spatial and temporal properties of the first higher symmetric zero group velocity Lamb mode (S1-ZGV) which are described in detail. No application dependent tuning or filtering is needed which makes the method robust and suitable for implementation in automatic IE thickness measurements. The proposed... (More)

The Impact Echo method can be used to measure the thickness of concrete plate like structures. Measurements are based on the identification of a clear thickness resonance frequency which can be difficult in very thick or highly attenuative plates. In this study the detectability of the measured resonant frequency is enhanced by time domain summation of signals with different source receiver spacing. The proposed method is based on the spatial and temporal properties of the first higher symmetric zero group velocity Lamb mode (S1-ZGV) which are described in detail. No application dependent tuning or filtering is needed which makes the method robust and suitable for implementation in automatic IE thickness measurements. The proposed technique is exemplified with numerical data and field data from a thick concrete wall and a highly attenuative asphalt concrete layer.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Concrete, Impact echo, Lamb wave, MASW, Multichannel analysis of surface waves
in
Smart Structures and Systems
volume
17
issue
1
pages
14 pages
publisher
Techno Press
external identifiers
  • Scopus:84958245896
ISSN
1738-1584
DOI
10.12989/sss.2016.17.1.059
language
English
LU publication?
yes
id
8a3bd4fb-5f87-4214-9760-b8b10eb09a7a
date added to LUP
2016-06-23 13:09:54
date last changed
2016-06-23 13:09:54
@misc{8a3bd4fb-5f87-4214-9760-b8b10eb09a7a,
  abstract     = {<p>The Impact Echo method can be used to measure the thickness of concrete plate like structures. Measurements are based on the identification of a clear thickness resonance frequency which can be difficult in very thick or highly attenuative plates. In this study the detectability of the measured resonant frequency is enhanced by time domain summation of signals with different source receiver spacing. The proposed method is based on the spatial and temporal properties of the first higher symmetric zero group velocity Lamb mode (S1-ZGV) which are described in detail. No application dependent tuning or filtering is needed which makes the method robust and suitable for implementation in automatic IE thickness measurements. The proposed technique is exemplified with numerical data and field data from a thick concrete wall and a highly attenuative asphalt concrete layer.</p>},
  author       = {Ryden, Nils},
  issn         = {1738-1584},
  keyword      = {Concrete,Impact echo,Lamb wave,MASW,Multichannel analysis of surface waves},
  language     = {eng},
  month        = {01},
  number       = {1},
  pages        = {59--72},
  publisher    = {ARRAY(0xd351048)},
  series       = {Smart Structures and Systems},
  title        = {Enhanced impact Echo frequency peak by time domain summation of signals with different source receiver spacing},
  url          = {http://dx.doi.org/10.12989/sss.2016.17.1.059},
  volume       = {17},
  year         = {2016},
}