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Evaristo Rojas Mayoral
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- May 26, 2010
- 04:00 AM
- 437 views
Design of an inexpensive digital anemometer
by Evaristo Rojas Mayoral in Octopodo
If you put a pendulum under the influence of a flow, a drag force will move the pendulum creating an angle with respect to the vertical. As the angle is related to the drag force, and because the drag force is related to the velocity of the flow, you can determine the velocity of the flow by only measuring the angle of the pendulum.
You could measure the angle with a protractor, but what we decided to do is to attach a large, light ball to the top of the pendulum and to register the rotation ........ Read more »
Hernández-Walls, R., Rojas-Mayoral, E., Baéz-Castillo, L., & Rojas-Mayoral, B. (2008) Design and calibration of an inexpensive digital anemometer. Physics Education, 43(6), 593-598. DOI: 10.1088/0031-9120/43/6/005
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