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Sensors: IR-Detector based Anemometer - Sailing and Windsurfing are common recreational activities
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Sensors: IR-Detector based Anemometer Sailing and Windsurfing are common recreational activities but both require a minimum of wind depending on the experience of the user. I wanted to design an anemometer capable of measuring wind speed (and direction) in m/s, possibly with a converter to display speeds in mph or knots. It would also help if it was of sturdy design and portable to allow it to be easily relocated. To design my anemometer I first had to investigate the properties of my Sensor, a dual Infrared emitter and Phototransistor. It worked by emitting IR radiation from a diode, and detecting the intensity of reflected IR radiation from the surface it is pointed at. For the purposes of measuring wind I needed to know a speed. The easiest and most accurate way to measure speed in this case was to convert the linear wind speed into rotational speed using a simple "windmill"-type...
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