Abstract
To improve the performance of wind sensors in the high velocity range, this paper proposes a wind measurement strategy for thermal wind velocity sensors that combines the constant power and constant temperature difference driving modes of the heating element. Based on the airflow distribution characteristics from fluid dynamics, sequential measurement and correction is proposed as a method of measuring wind direction. In addition, a wind velocity and direction measurement instrument was developed using the above-mentioned approaches. The test results showed that the proposed instrument can obtain large dynamic wind velocity measurements from 0 to 60 m/s. The wind velocity measurement accuracy was ±0.5 m/s in the common velocity range of 0-20 m/s and ±1 m/s in the high velocity range of 20-60 m/s. The wind direction accuracy was ±3° throughout the 360° range. The proposed approaches and instrument are not only practical but also capable of meeting the requirements of wide-range and large dynamic wind vector measurement applications.
Highlights
Wind field measurement, i.e. wind speed and direction measurements, provides essential reference information for studying the operation of the atmospheric circulation, water vapor transport conditions and other natural environments
The wind field measurement for natural environment is characterized by large wind speed dynamics and fast wind direction changes [7, 8]
When measuring low and medium wind velocities, the heating component operates in constant power (CP) mode, whereas at high wind velocities, it operates in constant temperature difference (CTD) mode
Summary
I.e. wind speed and direction measurements, provides essential reference information for studying the operation of the atmospheric circulation, water vapor transport conditions and other natural environments. Wind field measurement is widely used in some artificial environments such as mines, warehouses, buildings and other ventilation systems [1,2,3,4,5,6]. The wind field measurement for natural environment is characterized by large wind speed dynamics and fast wind direction changes [7, 8]. Accurate wind speed and direction measurements are needed even the wind speed is small and the wind direction is stable [9, 10].
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