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Technical Discussions
John
John
06:15 Mar-12-2003
Wave spreading at various frequencies in piezo strips

I am currently involved in a project investigating simple transducer arrays, where the transducers are merely strips of peizo electric material.

At lower frequencies the longditudinal waves spread out more increasing the range of the array, at higher frequencys the scan is more focused.

My question is why? Is it due to simple diffraction from the surface of the strip?


    
 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1261

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1261
06:21 Mar-12-2003
Re: Wave spreading at various frequencies in piezo strips
You are correct in assuming this is a diffraction effect.
go to this website for a better explantion;

http://www.ndt.net/article/az/ut_idx.htm

Ed

: I am currently involved in a project investigating simple transducer arrays, where the transducers are merely strips of peizo electric material.
.
: At lower frequencies the longditudinal waves spread out more increasing the range of the array, at higher frequencys the scan is more focused.
.
: My question is why? Is it due to simple diffraction from the surface of the strip?
.



    
 
 Reply 
 
Edward Purchase
Edward Purchase
02:26 Jun-30-2003
Re: Wave spreading at various frequencies in piezo strips
Hello,

I am conducting and investigation into the peizoelectric effect. Did you make the peizo strips yourself? And if so, how?



    
 
 Reply 
 

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