Hello, I'm trying capture echo signal with two 1Mhz transducers on two sides on 9cm water tank. I was using just one transducer but blind zone was longer than echos returning time. In my application i must measure echos frequency and i'm using zero-crossing output(O3) for that.
With 2 transducers I was thinking i can get rid of ringing on RX transducer after burst pulses because that ringing also triggering zero-crossing.
In that photo above Yellow is Tx transducer, Blue is zero-crossing
Second picture is Rx transducer(Yellow) , Tx transducer(Blue)
As you can see Rx transducer also ringing at the beginning of the burst pulses and that triggering zero-crossing and I can't capture the frequency of echo signal.
That's my registers.
What can i do for solve this problem can you help me ?
Thank you for your kind interest,