
5597 views  Technical Discussions   Jens Forker
 Jens Forker
 02:45 Aug222001 free software for wavelet analysis and dispersion curve calculation Hello everybody free software available: 1) AGUVallen 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}   02:52 Aug222001 Re: free software for wavelet analysis and dispersion curve calculation Jens,I am working on a project related with wavelet applications in Ultrasonic NDE. 1Is your software specifically related with AE? 2Do you have similar softwares which would be applicable for Ultrasonic? Thanks, Nihat GEAE/GE MTC : Hello everybody . : free software available: . : 1) AGUVallen 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}   03:20 Aug222001 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) 1521 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. : 1Is your software specifically related with AE? : 2Do you have similar softwares which would be applicable for Ultrasonic? . : Thanks, : Nihat : GEAE/GE MTC .
 
   Jens Forker
 Jens Forker
 04:57 Aug222001 Re: free software for wavelet analysis and dispersion curve calculation Dear Nihat, the AGUVallen 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. : 1Is your software specifically related with AE? : 2Do you have similar softwares which would be applicable for Ultrasonic? . : Thanks, : Nihat : GEAE/GE MTC . . : : : Hello everybody : . : : free software available: : . : : 1) AGUVallen 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 Nov302002 Re: free software for wavelet analysis and dispersion curve calculation : I am working on a project related with wavelet applications in Ultrasonic NDE. : 1Is your software specifically related with AE? : 2Do 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. : 1Is your software specifically related with AE? : 2Do you have similar softwares which would be applicable for Ultrasonic? . : Thanks, : Nihat : GEAE/GE MTC . . : : : Hello everybody : . : : free software available: : . : : 1) AGUVallen 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 Dec022002 Re: free software for wavelet analysis and dispersion curve calculation Hi,AGUVallen 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. : : 1Is your software specifically related with AE? : : 2Do 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. : : 1Is your software specifically related with AE? : : 2Do you have similar softwares which would be applicable for Ultrasonic? : . : : Thanks, : : Nihat : : GEAE/GE MTC : . : . : : : : : Hello everybody : : . : : : free software available: : : . : : : 1) AGUVallen 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 Apr152014 Re: free software for wavelet analysis and dispersion curve calculation In Reply to Jens Forker at 02:45 Aug222001 (Opening).
I have a set data of 1975 numbers of data with the time interval of 2.03E07. 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 Apr152014 Re: free software for wavelet analysis and dispersion curve calculation In Reply to yew at 07:06 Apr152014 .
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 Apr162014 Re: free software for wavelet analysis and dispersion curve calculation In Reply to Eraldo Pomponi at 15:39 Apr152014 .
Thanks for the suggestions. The problem is solved. Thank you.  
  
