Abstract
A method for calibrating a hot-wire anemometer is described. To determine directly sensitivities of the system within linear operations to accurately known velocity perturbations, the hot-wire element was sinusoidally shaked at low frequencies in a uniform flow. The direct measurement for sensitivities is unneccessary to strictly linearize the anemometer output against speed. When reciprocals of the sensitivities are integrated with respect to the output voltage of the system, the conventional static calibration curve can be obtained. Accordingly, this method requires no any referred wind speeds and is suitable for calibrating the system at extremely low wind speed. As a example, a constant-temperature hot-wire anemometer with a usual linearizer output was calibrated. A few easy calibrations used this method are described.
