Low Cost Cup Electronic Anemometer

In all studies involving wind speed, such as meteorology, wind turbines and agriculture, require accurate speed information for decision making. There are several types of anemometers, with medium and high costs, such as Cup, hot wire and Pitot tubes, and the hot wire is more sensitive and expensive than others.The device developed in this work is the Cup anemometer, to be easy to build. The great advantage of this device is the low cost, with an approximate value of US$ 50.00, using simple materials and easy to find in commercial stores. The Reed Switch sensor is also another advantage as it does not require a sophisticated programming, as well as the open platform Arduino. The use of aerodynamic drag coefficients and the presented calculations resulted in values very close to a commercial anemometer with a good coefficient of determination(R^2 ). The present sensor was developed as part of the project of a meteorological station to monitor the micro-climate of the city of Catanduva-SP, Brazil.

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