Experiment and statement of uncertainty in measuring wind speed measurements

Abstract

     Accurate wind speed measurements are critical in various fields, including weather forecasting, scientific research, and industrial safety. To achieve this precision, calibration is essential. Different technologies are used for wind speed measurements, such as mechanical, infrared, thermal, and ultrasonic methods. During calibration, it's crucial to assume uniform airflow. Factors affecting measurement results must be considered and documented in the calibration process. At the Institute of Technology and Environment Verification (ETV), high-range wind speed measurement devices are calibrated in the Omega WT4401-D standard wind tunnel. This environment can generate air streams at speeds from 0 m/s to 45 m/s, ensuring precision within 1% to 2% across the entire duct. The calibration principle involves comparing device measurements to standardized wind tunnel values. Wind speed measurement devices can be calibrated with uncertainties of (1.03% to 3.02%) and a 95% confidence level.