Jump to content

Echo detection for Ultrasonic wave


Recommended Posts

Hello :D

I have simulated and ultrasonic wave and want to estimate the echo apparition by getting the pics and valleys and giving the time of apparition of a meaningfull pic of my echo. which itself represent the time of flight. knowing the time associated to my pics is my question.

Thank you very much for any Help!

Regards

 

IHAD ;)

 

Ultraschall.vi

pic detection and pic-time relation.vi

Edited by I HAVE A DREAM
Link to post
Share on other sites

A technique called "cepstral" analysis is often used to find echoes. I don't think LabVIEW has a cepstrum VI that comes with the standard analysis library but MATLAB does

http://www.mathworks.com/help/signal/ref/cceps.html#bub3q8y

There is cepstral analysis in the adavanced signal processing toolkit

http://www.ni.com/example/30654/en/

 

 

Edited by MarkCG
Link to post
Share on other sites

Hi,

thank you for your answer. 

@MarkCG do you suggest me to use the matlab code in Labview ? 

I have read about it and it seem to be use for echo cancelation.

@Jordan Kuehn I have a similar question. The context is: I will like to estimate the time of apparition of and ultrasonic echo. 

I have used elements of your snippet. The "get a wave form subset" give a subset in a different timetable independent of the timetable of the main waveform, I could use it if it maintain the timetable of the main waveform.

the "seach waveform" search a given value and return the index I think. Any recomendation please ?

 

Ultraschall.vi

Inspired by Jordan Kuehn.vi

Edited by I HAVE A DREAM
Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.