Flow meter using accelerometer sensor?

Thread Starter

DJ_AA

Joined Aug 6, 2021
22
Hi All

Is it possible to use an accelerometer to detect water flow in a pipe?

I do not need to have accurate flow rates(LPM) unless is easily achieved, but just need to be able to detect that something is flowing.

If I am correct this is possible from the vibrations?
 

Reloadron

Joined Jan 15, 2015
6,137
I have read about several ways to measure a flow rate using accelerometers and vibration but most are complex using multiple accelerometers and lacking in accuracy. If you simply want to detect i9f there is or is not flow in a pipe, depending on medium, a simple flow switch is likely the easiest and most economic solution. So is it possible? Yes, it is possible.

Ron
 

Thread Starter

DJ_AA

Joined Aug 6, 2021
22
I would like to avoid cutting pipes and sealing them up. Some pipes i would need to detect are between 4-6 inches, therefore the flow sensors would be costly.
 

Alec_t

Joined Sep 17, 2013
12,261
In theory you could inject ultrasound through the pipe wall into the fluid at one point and detect the Doppler frequency shift with a sensor at a downstream point. Acoustic coupling and signal processing might be challenging in practice.
 

DickCappels

Joined Aug 21, 2008
7,898
Or you could bond a resistor to the pipe using high temperature epoxy, run some current through the resistor and monitor the temperature of a thermistor or other temperature sensor. When water flows, the temperature would drop. Not as certain as a flow switch but hey...if you have sufficient flow and the pipe's wall is not too think it should work.
 

MrSalts

Joined Apr 2, 2020
654
Hi All

Is it possible to use an accelerometer to detect water flow in a pipe?

I do not need to have accurate flow rates(LPM) unless is easily achieved, but just need to be able to detect that something is flowing.

If I am correct this is possible from the vibrations?
Some of the most accurate flow sensors use accelerometers and the Coriolis effect of water making a turn in a curved, vibrating pipe (not the earth's rotation). But that is a research project in itself and design/calibration of curved castings of pipe. Google: Coriolis meter or MicroMotion flow meter
Describe your specific piping, tubing pump, flow rate, back pressure situation.
 
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