Hi. I'm making a ultrasonic liquid flow meter using HCSR04 Ultrasonic Sensor and Arduino Uno. But the problem I'm facing is that HCSR04 only reflects back the wave after getting in contact with the first(outer) layer of the pipe and gives me the reading, whereas I need it to penetrate it through the pipe and reflect back from the second(inner) surface of the pipe to get the flow rate. For this purpose, I want to modify and increase the power of transmitter in the HCSR04, so it can penetrate it through.
Kindly give your suggestions, or an alternative solution.
I moved your topic to an appropriate forum category @wajeehx.
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Thanks in advance for your cooperation.
Assuming you could increase the transmitter power and it could penetrate the first pipe layer, how would this enable it to sense liquid flow?
Please explain your theory about this, and describe in more detail, with diagrams, where this liquid is, how it is flowing, what type of liquid, the material and thickness the pipes are made from and so on.
Without that information, I think all we can say is that you are trying to use a sensor to do something it cannot do.
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You're trying to get sound waves to pass through the interface between air and the wall of the liquid. That's not going to work. The sensor is actually meant for this to not happen, as it wants an echo.
You will need a very different kind of ultrasound device, that is designed to be glued to a solid surface and push its soundwaves into the surface, like the DS1603L ultrasound sensor, which is meant to measure water levels from the bottom of a tank.
Not that it will give you a flow rate, it will just tell you the distance to the other side of the pipe. But at least it gives you an idea on how to get ultrasound waves IN the pipe.
I believe you have made a bad choice. Use your search engine and search for "Arduino flow sensor" You will get a lot of hits with sensors from inexpensive to very expensive. What is going through the pipe has a bearing as does the size of the pipe etc.
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