Re: Ultrasonic transducer help

The water is dirty, wastewater (i.e sewage) if you really want to
know, which should help a bit with the recieve. I am aware the return
signal will be pretty faint compared to the transmit, I'm not sure how
faint but am prepared to invest the time to make a transducer, connect
to an oscilloscope and play around with it until I find out if it is
possible. My guess is the first few bins of FFT will be all bleed from
the transmit, so near zero velocity detection will be impossible. I'm
also trying to read up on transducer design to get a good recieve
signal. Thankfully it is not as critical as blood flow, but should be
a good way to learn and possibly produce something useful.

.

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