NASA NTRS · 19850011985
Miniature electrooptical air flow sensor
Abstract
A sensor for measuring flow direction and airspeed that is suitable, because of its small size, for rapid instrumentation of research airplanes is described. A propeller driven sphere rotating at a speed proportional to airspeed presents a reflective target to an electro-optical system such that the duty cycle of the resulting electrical output is proportional to yaw angle and the frequency is proportional to airspeed.
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Kershner, D. D.. 1984-12-04. Miniature electrooptical air flow sensor. https://ntrs.nasa.gov/citations/19850011985
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