| I've thought that it may be possible to build a solid-state anemometer using two pressure sensors (like the Motorola MPX4115 series of sensors). It would operate by measuring the static and dynamic pressure of the airflow, like the airspeed indicator of an aircraft (detailed here). There are several issues I could see occuring... the first is that the anemometer would probably be inaccurate at "low" wind speeds (I don't know what "low" would be defined as; probably depending on circuit noise and other factors). Also, the necessary calibration process may be slightly more complicated than the calibration of an anemometer with wind cups.
At the end of the day, it may just be better to go out and buy a "real" anemometer with the money one would spend buying pressure sensors and related circuitry, but I'm curious mainly for my own understanding. I figure there's a reason why even the million-dollar turbines use anemometer cups; are those really the best way? |
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