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Technical Discussions
Jens Forker
Jens Forker
02:45 Aug-22-2001
free software for wavelet analysis and dispersion curve calculation

Hello everybody

free software available:

1) AGU-Vallen Wavelet
In cooperation with Aoyama Gakuin University, Japan, we
developed a software tool to calculate the wavelet transform
from AE signals. The wavelet transform reveals which part of a
signal carries energy at which frequencies. More information can
be found at www.vallen.de/wavelet
We provide this software free of charge to support further
research and development in this field.

*************************
3) Vallen Dispersion
Allows you to calculate the possible wavemodes in a plate,
based on (bulk) longitudinal and transversal speed of sound and
the plate thickness.
This software can be received from www.vallen.de/freeware

regards
Jens Forker



    
 
 
Nihat
Engineering
Turkey, Joined Jul 2001, 4

Nihat

Engineering
Turkey,
Joined Jul 2001
4
02:52 Aug-22-2001
Re: free software for wavelet analysis and dispersion curve calculation
Jens,

I am working on a project related with wavelet applications in Ultrasonic NDE.
1-Is your software specifically related with AE?
2-Do you have similar softwares which would be applicable for Ultrasonic?

Thanks,
Nihat
GEAE/GE MTC


: Hello everybody
.
: free software available:
.
: 1) AGU-Vallen Wavelet
: In cooperation with Aoyama Gakuin University, Japan, we
: developed a software tool to calculate the wavelet transform
: from AE signals. The wavelet transform reveals which part of a
: signal carries energy at which frequencies. More information can
: be found at www.vallen.de/wavelet
: We provide this software free of charge to support further
: research and development in this field.
.
: *************************
: 3) Vallen Dispersion
: Allows you to calculate the possible wavemodes in a plate,
: based on (bulk) longitudinal and transversal speed of sound and
: the plate thickness.
: This software can be received from www.vallen.de/freeware
.
: regards
: Jens Forker
.



    
 
 
Christian Grosse
Teacher,
Technische Universität München, Germany, Joined Nov 2000, 11

Christian Grosse

Teacher,
Technische Universität München,
Germany,
Joined Nov 2000
11
03:20 Aug-22-2001
Re: free software for wavelet analysis and dispersion curve calculation
Dear Nihat:

We are developing wavelet based software for applications in Ultrasonic NDE, Impact Echo and Acoustic Emission.

You will find also several articles about similar applications for wavelet transforms in NDE here on NDT.net at:
15th World Conference on Nondestructive Testing
Roma (Italy) 15-21 October 2000 - Proceedings:
http://www.ndt.net/article/wcndt00/index.htm

Regards,
Christian

: Jens,
.
: I am working on a project related with wavelet applications in Ultrasonic NDE.
: 1-Is your software specifically related with AE?
: 2-Do you have similar softwares which would be applicable for Ultrasonic?
.
: Thanks,
: Nihat
: GEAE/GE MTC
.



    
 
 
Jens Forker
Jens Forker
04:57 Aug-22-2001
Re: free software for wavelet analysis and dispersion curve calculation
Dear Nihat,
the AGU-Vallen Wavelet software can also import ASCII data (from whatever method it comes).
Regards
Jens

: Jens,
.
: I am working on a project related with wavelet applications in Ultrasonic NDE.
: 1-Is your software specifically related with AE?
: 2-Do you have similar softwares which would be applicable for Ultrasonic?
.
: Thanks,
: Nihat
: GEAE/GE MTC
.
.
:
: : Hello everybody
: .
: : free software available:
: .
: : 1) AGU-Vallen Wavelet
: : In cooperation with Aoyama Gakuin University, Japan, we
: : developed a software tool to calculate the wavelet transform
: : from AE signals. The wavelet transform reveals which part of a
: : signal carries energy at which frequencies. More information can
: : be found at www.vallen.de/wavelet
: : We provide this software free of charge to support further
: : research and development in this field.
: .
: : *************************
: : 3) Vallen Dispersion
:: Allows you to calculate the possible wavemodes in a plate,
: : based on (bulk) longitudinal and transversal speed of sound and
: : the plate thickness.
: : This software can be received from www.vallen.de/freeware
: .
: : regards
: : Jens Forker
: .
.



    
 
 
Maryam Ravan
Maryam Ravan
07:04 Nov-30-2002
Re: free software for wavelet analysis and dispersion curve calculation
: I am working on a project related with wavelet applications in Ultrasonic NDE.
: 1-Is your software specifically related with AE?
: 2-Do you have similar softwares which would be applicable for Ultrasonic?
.
: Thanks,

: Jens,
.
: I am working on a project related with wavelet applications in Ultrasonic NDE.
: 1-Is your software specifically related with AE?
: 2-Do you have similar softwares which would be applicable for Ultrasonic?
.
: Thanks,
: Nihat
: GEAE/GE MTC
.
.
:
: : Hello everybody
: .
: : free software available:
: .
: : 1) AGU-Vallen Wavelet
: : In cooperation with Aoyama Gakuin University, Japan, we
: : developed a software tool to calculate the wavelet transform
: : from AE signals. The wavelet transform reveals which part of a
: : signal carries energy at which frequencies. More information can
: : be found at www.vallen.de/wavelet
: : We provide this software free of charge to support further
: : research and development in this field.
: .
: : *************************
: : 3) Vallen Dispersion
: : Allows you to calculate the possible wavemodes in a plate,
: : based on (bulk) longitudinal and transversal speed of sound and
: : the plate thickness.
: : This software can be received from www.vallen.de/freeware
: .
: : regards
: : Jens Forker
: .
.



    
 
 
Jens Forker
Jens Forker
08:07 Dec-02-2002
Re: free software for wavelet analysis and dispersion curve calculation
Hi,

AGU-Vallen Wavelet is not specific to AE, virtually all time series data (import filter for ASCII format included, see Helptext) can be processed as the origin of the data is not evaluated. We know that people use it to analyze data from ultrasonics, climate changes (covering centuries), earthquakes,... and many more.

Best regards
Jens Forker

: : I am working on a project related with wavelet applications in Ultrasonic NDE.
: : 1-Is your software specifically related with AE?
: : 2-Do you have similar softwares which would be applicable for Ultrasonic?
: .
: : Thanks,
.
: : Jens,
: .
: : I am working on a project related with wavelet applications in Ultrasonic NDE.
: : 1-Is your software specifically related with AE?
: : 2-Do you have similar softwares which would be applicable for Ultrasonic?
: .
: : Thanks,
: : Nihat
: : GEAE/GE MTC
: .
: .
: :
: : : Hello everybody
: : .
: : : free software available:
: : .
: : : 1) AGU-Vallen Wavelet
: : : In cooperation with Aoyama Gakuin University, Japan, we
: : : developed a software tool to calculate the wavelet transform
: : : from AE signals. The wavelet transform reveals which part of a
: : : signal carries energy at which frequencies. More information can
: : : be found at www.vallen.de/wavelet
: : : We provide this software free of charge to support further
: : : research and development in this field.
: : .
: : : *************************
: : : 3) Vallen Dispersion
: : : Allows you to calculate the possible wavemodes in a plate,
: : : based on (bulk) longitudinal and transversal speed of sound and
: : : the plate thickness.
: : : This software can be received from www.vallen.de/freeware
: : .
: : : regards
: : : Jens Forker
: : .
: .
.



    
 
 
yew
yew
07:06 Apr-15-2014
Re: free software for wavelet analysis and dispersion curve calculation
In Reply to Jens Forker at 02:45 Aug-22-2001 (Opening).

I have a set data of 1975 numbers of data with the time interval of 2.03E-07. I have used the vallen wavelet to create tra file and the graph shown a straight line. I do have checked on my data and it is correct. In fact, the graph should be showing some peaks instead of straight line. Anyone can help?

    
 
 
Eraldo Pomponi
R & D, Teaching
Università Politecnica delle Marche, Italy, Joined May 2009, 7

Eraldo Pomponi

R & D, Teaching
Università Politecnica delle Marche,
Italy,
Joined May 2009
7
15:39 Apr-15-2014
Re: free software for wavelet analysis and dispersion curve calculation
In Reply to yew at 07:06 Apr-15-2014 .

Dear Yew,

I don't know Vallen .tra file creator/converter but I would guess that you have a problem with the datatype that, AFAIK, should be int16 and you are probably passing something like float32/float64.
Another option is to move from Vallen software and take your own path with other solutions. There are many other tools out there to perform Wavelet transform. Some examples are:

- Matlab + Wavelet toolbox
- Octave + Wavelab850 (Open Source)
- Python + PyWavelet (Open Source)

HTH,
Eraldo

    
 
 
Yew Wei Hoe
Yew Wei Hoe
04:28 Apr-16-2014
Re: free software for wavelet analysis and dispersion curve calculation
In Reply to Eraldo Pomponi at 15:39 Apr-15-2014 .

Thanks for the suggestions. The problem is solved. Thank you.

    
 
 

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