As part of physics course we get to create our own projects on the arduino, so I'd thought I'd make a combo temperature, wind speed, and wind direction sensor . Attached are a top and horizontal view of the ultrasonic transducer and cavity plate design, as well as a tentative block diagram of the sensor circuitry.++++++ snip+++++
I can't respond to the physics but I can tell you to use the 74HCT4046 or better an 'old' signetics NE561 or 2.
I am very dubious about the whole physics of the project.You are only using one phase locked loop and I don't see where that gets you. Drive the transducers with a differential signal not a single ended one.Normal wind vectors are measured by three othagional paths and a time of flight, with temprature measurement sepratly as an adjusting factor.
You do realise this has been done and has extensive documentation on the internet ?
If you know of some documentation that augments the 3 links that pertained to acoustic resonance anemometers, as opposed to simply ultrasonic anemometers, I would love to hear it. I was getting close to using bing to get find information