Abstract
The ultrasonic echography has a lot of advantages which make it attractive for nondestructive testing. But the important acoustic energy useful to go through very attenuating materials can be got only with resonant translators, that is a limit for the resolution on measured echograms. This resolution can be improved by deconvolution. But this method is a problem for austenitic steel. Here is developed a method of time deconvolution which allows to take in account the characteristics of the wave. A first step of phase correction and a second step of spectral equalization which gives back the spectral contents of ideal reflectivity. The two steps use fast Kalman filters which reduce the cost of the method.
Citation Formats
Vivet, L.
Resolution improvement of ultrasonic echography methods in non destructive testing by adaptative deconvolution; Amelioration de la resolution des methodes d`echographie ultrasonore en controle non destructif par deconvolution adaptative.
France: N. p.,
1989.
Web.
Vivet, L.
Resolution improvement of ultrasonic echography methods in non destructive testing by adaptative deconvolution; Amelioration de la resolution des methodes d`echographie ultrasonore en controle non destructif par deconvolution adaptative.
France.
Vivet, L.
1989.
"Resolution improvement of ultrasonic echography methods in non destructive testing by adaptative deconvolution; Amelioration de la resolution des methodes d`echographie ultrasonore en controle non destructif par deconvolution adaptative."
France.
@misc{etde_10103952,
title = {Resolution improvement of ultrasonic echography methods in non destructive testing by adaptative deconvolution; Amelioration de la resolution des methodes d`echographie ultrasonore en controle non destructif par deconvolution adaptative}
author = {Vivet, L}
abstractNote = {The ultrasonic echography has a lot of advantages which make it attractive for nondestructive testing. But the important acoustic energy useful to go through very attenuating materials can be got only with resonant translators, that is a limit for the resolution on measured echograms. This resolution can be improved by deconvolution. But this method is a problem for austenitic steel. Here is developed a method of time deconvolution which allows to take in account the characteristics of the wave. A first step of phase correction and a second step of spectral equalization which gives back the spectral contents of ideal reflectivity. The two steps use fast Kalman filters which reduce the cost of the method.}
place = {France}
year = {1989}
month = {Sep}
}
title = {Resolution improvement of ultrasonic echography methods in non destructive testing by adaptative deconvolution; Amelioration de la resolution des methodes d`echographie ultrasonore en controle non destructif par deconvolution adaptative}
author = {Vivet, L}
abstractNote = {The ultrasonic echography has a lot of advantages which make it attractive for nondestructive testing. But the important acoustic energy useful to go through very attenuating materials can be got only with resonant translators, that is a limit for the resolution on measured echograms. This resolution can be improved by deconvolution. But this method is a problem for austenitic steel. Here is developed a method of time deconvolution which allows to take in account the characteristics of the wave. A first step of phase correction and a second step of spectral equalization which gives back the spectral contents of ideal reflectivity. The two steps use fast Kalman filters which reduce the cost of the method.}
place = {France}
year = {1989}
month = {Sep}
}