Time Delay Estimation for Acoustic Source Location by Means of Short-Time Cross-Correlation

by Alain Le Duff, Seif Eddine Hamdi, Guy Plantier, Bertrand Lascoup
Abstract:
This article presents a method which can be used for online Acoustic Emission (AE) source location in a composite plate by means of time delay estimations. A short-time crosscorrelation function from the envelope of the two signals, has been developed. This method allows to estimate the time delay in the early coherent part of the signals, which is especially suitable in a very dispersive medium such as composite material. Experimental results, obtained with a glass-fiber/epoxy plate equipped with piezoelectric transducers, show that a balance of simplicity, accuracy and robustness can be achieved by using this method.
Reference:
Alain Le Duff, Seif Eddine Hamdi, Guy Plantier, Bertrand Lascoup, « Time Delay Estimation for Acoustic Source Location by Means of Short-Time Cross-Correlation », In IEEE Sensors 2011 conference, Limerick – Ireland, 2011.
Bibtex Entry:
@INPROCEEDINGS{LeDuffSENSORS2011,
  author = {Le Duff, Alain and Hamdi, Seif Eddine and Guy Plantier and Bertrand
	Lascoup},
  title = {Time Delay Estimation for Acoustic Source Location by Means of Short-Time
	Cross-Correlation},
  booktitle = {IEEE Sensors 2011 conference},
  year = {2011},
  address = {Limerick - Ireland},
  month = oct,
  abstract = {This article presents a method which can be used for online Acoustic
	Emission (AE) source location in a composite plate by means of time
	delay estimations. A short-time crosscorrelation function from the
	envelope of the two signals, has been developed. This method allows
	to estimate the time delay in the early coherent part of the signals,
	which is especially suitable in a very dispersive medium such as
	composite material. Experimental results, obtained with a glass-fiber/epoxy
	plate equipped with piezoelectric transducers, show that a balance
	of simplicity, accuracy and robustness can be achieved by using this
	method.},
  owner = {gplantier},
  timestamp = {2011.09.02}
}