Author Topic: Piezo anemometer  (Read 1207 times)

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Offline DanS

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Piezo anemometer
« on: July 24, 2016, 04:38:40 AM »
SLOweather and his flycup anne idea got me to thinking of another different approach and wonder if anybody has tried it. It would use a piezo chip that gets squeezed from wind pressure. Mount the whole thing on a vane to track with wind direction.https://en.wikipedia.org/wiki/Piezoelectric_sensor [ You are not allowed to view attachments ]
« Last Edit: July 24, 2016, 04:55:17 AM by DanS »

Offline vreihen

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Re: Piezo anemometer
« Reply #1 on: July 24, 2016, 06:24:43 AM »
How about a tall pole with 4 force sense resistors (FSRs) in a 90-degree N/E/S/W diamond pattern on the ground?  Zero moving parts, and you can calculate both wind speed and direction from the stress on each FSR.....
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Offline mcrossley

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Re: Piezo anemometer
« Reply #2 on: July 24, 2016, 06:27:54 AM »
I did see a similar design once that used four (or two at right angles, i can't recall exactly) piezoelectric sensors that just used an upright rod. From that you can determine both wind strength and direction.

Turbulence around a cylindrical rod may be an issue causing rapid fluctuations in the readings?
Mark


Offline miraculon

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Re: Piezo anemometer
« Reply #4 on: July 24, 2016, 08:31:53 AM »
I did see a similar design once that used four (or two at right angles, i can't recall exactly) piezoelectric sensors that just used an upright rod. From that you can determine both wind strength and direction.

Turbulence around a cylindrical rod may be an issue causing rapid fluctuations in the readings?

Absolutely, see this post (about the Davis rain gauge). http://www.wxforum.net/index.php?topic=26463.msg255276#msg255276



How much this would affect the piezo output is anyone's guess.

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Offline Garth Bock

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Re: Piezo anemometer
« Reply #5 on: July 26, 2016, 09:53:34 AM »
What about freezing rain, rain drop accumulation, or snow build up ? That would interfere with it as well.

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Offline mcrossley

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Re: Piezo anemometer
« Reply #6 on: July 26, 2016, 10:43:58 AM »
You need a hot stick!
Mark

 

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