What is an ultrasonic anemometer and what are its advantages
Wind speed and direction, as one of the important meteorological elements, have a wide range of application needs for mobile wind measuring instruments in industrial production and scientific research such as environmental detection, industrial air duct detection, and measurement of dangerous gases.
Ultrasonic anemometer is a measuring sensor or measuring instrument that calculates wind speed and wind direction by sending sound pulses and measuring the time or frequency (Doppler transform) difference at the receiving end. Due to the propagation speed of sound in the air, it will superimpose with the airflow speed in the wind direction.
If the ultrasonic wave travels in the same direction as the wind, its speed will increase; conversely, if the ultrasonic wave travels in the opposite direction to the wind, its speed will slow down. Therefore, under fixed detection conditions, the speed of ultrasonic waves propagating in the air can correspond to the wind speed function. Accurate wind speed and wind direction can be obtained through calculation. Since the speed of sound waves is greatly affected by temperature when they propagate in the air; the wind speed sensor detects two opposite directions on two channels, so the effect of temperature on the speed of sound waves is negligible.
Compared with the traditional wind speed sensor, the ultrasonic wind speed sensor has the advantages of good measurement accuracy and multiple functions, and its probe structure is relatively simple, and it replaces the traditional wind speed and direction sensor in many application fields.
