Element count reduction of a thermo-resistive hot-wire anemometer
Author(s)
Adamec, Richard
Griffith University Author(s)
Year published
2008
Metadata
Show full item recordAbstract
A MEMS hot wire anemometer consisting of thermoresistive elements arranged in a differential bridge configuration is presented. The arrangement of the elements allows for dedicated heating elements to be omitted from the device without compromising operation or accuracy. Overall power consumption gives velocity and the temperature differential of each element pair is used for direction and has demonstrated a sensing resolution better than 1% and a repeatable accuracy better than 2%. Field trials have demonstrated a robust design with exposure to rain, dust and debris for a period in excess of 12 months with continuing operation.A MEMS hot wire anemometer consisting of thermoresistive elements arranged in a differential bridge configuration is presented. The arrangement of the elements allows for dedicated heating elements to be omitted from the device without compromising operation or accuracy. Overall power consumption gives velocity and the temperature differential of each element pair is used for direction and has demonstrated a sensing resolution better than 1% and a repeatable accuracy better than 2%. Field trials have demonstrated a robust design with exposure to rain, dust and debris for a period in excess of 12 months with continuing operation.
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Conference Title
Proceedings of SPIE - The International Society for Optical Engineering, Volume 7268: Smart Structures, Devices, and Systems IV, 2008