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Self Heated Thermo-Resistive Element Hot Wire Anemometer

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2 Author(s)
Adamec, R.J. ; Sch. of Eng., Griffith Univ., Gold Coast, QLD, Australia ; Thiel, D.V.

A microelectromechanical systems (MEMS) hot wire anemometer consisting of thermoresistive elements arranged in a differential bridge configuration is presented. The excitation of the elements to the point of self heating allows for dedicated heating elements to be omitted from the device without compromising operation or accuracy. Overall power consumption gives air velocity, and the temperature differential of each element pair is used for wind direction calculation and has demonstrated a sensing resolution better than 1% and a repeatability better than 2%.

Published in:

Sensors Journal, IEEE  (Volume:10 ,  Issue: 4 )