Ultrasonic Transducer interfacing help.

  • Thread starter rohitsay89
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  • #1

Main Question or Discussion Point

Yesterday I bought an Ultrasonic Transducer pair. i am trying to work with it. i am giving a 40khz square wave 14Vpp(peak to peak) to the transmitter and trying to receive it through the receiving transducer. but cannot get any voltage at the receiver. please help me out...
 

Answers and Replies

  • #2
davenn
Science Advisor
Gold Member
2019 Award
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without seeing your circuits I cant tell you where you may have made an error

but here is a ultrasonic transmitter and receiver circuit.....

attachment.php?attachmentid=50867&stc=1&d=1347773619.jpg


attachment.php?attachmentid=50868&stc=1&d=1347773609.jpg


cheers
Dave
 

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  • #3
Bobbywhy
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Why have you driven your transmitting transducer with a square wave? I have, after more than 25 years in specialized sonar, never heard of using a square wave drive signal! Where did you get that plan? Why not use a sine wave? Piezeoelectric materials react well to sine waves. Think about it: a square wave is really an infinite number of odd harmonics superimposed. Sound in air does not propagate by changing pressure levels from zero to maximum instantaneously.
 
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