What flows through the pipe and why do you need to know how fast it flows? What are you going to use this information for?
How come none of the plethora of off the shelf solutions for flow measurement meet your requirements?
air flows inside the pipe
I'll wait another 42 hours so you can address the other questions I asked.
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I asked you that question 21 days ago.
Here is your reply
You need to make up your mind on what you want to do.
Now you have me going in circles trying to help..
I give up!
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Quite challenging setup. Measure liquid air flow in a pipe with piezo buzzers and Esp32...
Really sorry for that because i am working in a company and they have assigned this project to me so i am trying to figure out how i can pull this off , sorry for that once again
so all the change are coming from above
Tell your managers that the project requirements are unrealistic.
Also, apply for jobs at different companies if your current employer has a habit of sending you off into the woods with no resources.
Do you not know the Bernoulli Principle and how fluid flow is determined by pressure?
You ought to be able to do the math to show that it is unrealistic.
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Need to check it out
Piezo disk when pressed or released, the sides change relative voltage and current flows. That could be used to measure pressure change.
Over long term there will be bleed but when I experimented with piezo disks as force sensors I could press hard to get a read (rather than dissipaate) and then when I released the force in steps I got good analog results.
If you read about piezo crystal and the metal plate on each side, you can seen what goes on; how the lattice gets squeezed changes on the electrical forces on the plates. A piezo disk is like a capacitor that you charge by squeezing and discharge through release. the lattice ions never dissipate, change will always show.