Abstract
Abstract
The hot wire anemometer is a commonly used device for measuring air speed in laboratories. In this paper, the relationship between air speed and temperature in different air speed ranges was analyzed based on the theory of thermal equilibrium. A measurement circuit and hot wire shape were designed based on the principle of the hot wire anemometer, and the linear relationship between current and temperature in the hot wire at different air speeds was verified in an adjustable air speed field. The measured current was used to represent air speed. The designed hot wire anemometer was experimentally validated to provide measurement results that match the theoretical values in different air speed ranges. Finally, the sensitivity of the anemometer in different measurement ranges was determined based on the uncertainty of the instrument's sensitivity and the measurement formula.
Publisher
Research Square Platform LLC
Reference21 articles.
1. Method of testing fast-changing and pulsating flows by means of a hot-wire anemometer with simultaneous measurement of voltage and current of the sensor;Ligza P;Measurement,2022
2. A hot-wire anemometer with automatically adjusted dynamic properties for wind energy spectrum analysis;Ligza P;Energies,2022
3. Gucyetmez, M., Keser, S., & Hayber, S. E.. (2022). air speed measurement with a low-cost polymer optical fiber anemometer based on fresnel reflection. Sensors and Actuators, A. Physical, 339.
4. Turbulence fluxes and variances measured with a sonic anemometer mounted on a tethered balloon;Canut G;Atmospheric Measurement Techniques,2016
5. Fast-response fiber-optic anemometer with temperature self-compensation;Liu G;Optics Express,2015