Ultrasonic wind speed and direction indicator, also known as ultrasonic wind speed and direction indicator, ultrasonic wind speed and direction sensor, is a wind speed and direction measurement instrument developed based on the principle of ultrasound. Wind speed and direction. The sensor can simultaneously measure the instantaneous values of wind speed and direction.
The working principle of the ultrasonic wind speed and direction indicator is to use the ultrasonic time difference method to achieve the measurement of the wind speed and direction. Because the speed of sound propagation in the air will be superimposed on the speed of the airflow upward. If the propagation direction of the ultrasonic wave is the same as the wind direction, then its speed will be accelerated; conversely, if the propagation direction of the ultrasonic wave is opposite to the wind direction, then its speed will become slower.
Therefore, under a fixed detection condition, the speed of ultrasonic wave propagation in the air can correspond to the wind speed function. The exact wind speed and direction can be obtained through calculation. Since the sound wave propagates in the air, its speed is greatly affected by temperature; the wind speed sensor detects two opposite directions on the two channels, so the effect of temperature on the sound wave speed is negligible.
