[NDE] Typical amplitude of a pulse-echo transducer???

Tue, 27 Feb 2007 12:58:26 +0000

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Hi there,

Could anyone point me to somewhere where I can find a typical amplitude of a
pulse-echo sensor please? I'm doing a research degree in NDE coupled with
artificial neural networks for defect detection and classification, but am
having a bit of trouble with a FE model. Whatever kind of signal I apply to
the model, I can't seem to get a response that looks much like what one
would expect from a normal A-scan.

If anyone's had any experience in this or is involved in similar
work/research, please feel free to get in touch with me.

At the moment I'm modelling the pulse as a single sinusoidal function (1
period) with an amplitude of 10MPa and a frequency of 250MHz. Anyone got any
better advice on this?!!!

Many thanks,

Simon Farley

Researcher in Mechanical Engineering

School of Technology

Oxford Brookes University

Wheatley Campus

Oxford 

UK

sfarley@brookes.ac.uk

+44 (0) 7880 733830

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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Hi there,<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

Could anyone point me to somewhere where I can find a
typical amplitude of a pulse-echo sensor please? I&#8217;m doing a research
degree in NDE coupled with artificial neural networks for defect detection and
classification, but am having a bit of trouble with a FE model. Whatever kind
of signal I apply to the model, I can&#8217;t seem to get a response that looks
much like what one would expect from a normal A-scan.<o:p></o:p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>If anyone&#8217;s had any experience in this or is
involved in similar work/research, please feel free to get in touch with me.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

At the moment I&#8217;m modelling the pulse as a
single sinusoidal function (1 period) with an amplitude of 10MPa and a
frequency of 250MHz. Anyone got any better advice on this?!!!<o:p></o:p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Many thanks,<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Simon Farley<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Researcher in Mechanical Engineering<o:p></o:p></span></font></p>

<p class=MsoNormal><st1:place w:st="on"><st1:PlaceType w:st="on"><font size=2
  face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial'>School</span></font></st1:PlaceType><font
 size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial'>
 of <st1:PlaceName w:st="on">Technology</st1:PlaceName></span></font></st1:place><font
size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>

<p class=MsoNormal><st1:PlaceName w:st="on"><font size=2 face=Arial><span
 lang=EN-GB style='font-size:10.0pt;font-family:Arial'>Oxford</span></font></st1:PlaceName><font
size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial'> <st1:PlaceName
w:st="on">Brookes</st1:PlaceName> <st1:PlaceName w:st="on">University</st1:PlaceName><o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>Wheatley Campus<o:p></o:p></span></font></p>

<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=2
  face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial'>Oxford</span></font></st1:place></st1:City><font
size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial'> <o:p></o:p></span></font></p>

<p class=MsoNormal><st1:country-region w:st="on"><st1:place w:st="on"><font
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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'><a href="mailto:sfarley@brookes.ac.uk">sfarley@brookes.ac.uk</a><o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt;font-family:Arial'>+44 (0) 7880 733830<o:p></o:p></span></font></p>

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