Ultrasonic Flow Sensor
david wrote 11/05/2015 at 21:14 • 3 pointsHi Guys
Anyone of you ever played around with building an ultrasonic flow sensor? I'd like to build a clip on sensor that I can stick over a pipe that detects when water is flowing - its possible, but the industrial units costs £££.. Reason for ultrasonics is that its non invasive, so could 2 sensors could simply be clipped over a pipe to determine if water is flowing. Any ideas or pointers ?
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I don't know anything about this topic, but my dad was just talking the other day about an ultrasonic flow sensor that is used in hospitals to detect blood flow in a non-invasive fashion. It requires a doppler ultrasound sensor of some sort, so it's not the "normal" type of imaging ultrasound machine. I know you probably won't find much in the way of open-source projects focused on this type of technology, but it is a different source of information on which you might be able to focus your research.
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Great resources above. I had done some research on such sensors, and here's an interesting company that makes low power (but intrusive) ultrasonic sensors and boards:
http://www.d-flow.com/
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Texas Instruments has a few offerings for Ultrasonic Flow Sensors. One of their app notes: http://www.ti.com/lit/an/snaa220a/snaa220a.pdf
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Thank you , that link is spot on!
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never tried myself, but I recently saw an app-note from maxim on the topic:
https://www.maximintegrated.com/en/app-notes/index.mvp/id/5968
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Great app note! I work quite extensively with industrial clamp-on ultrasonic flow transmitters; they're fascinating devices but quite expensive for home use. I'd love to see someone put this together.
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