How ultrasonic wind speed sensor works

How ultrasonic wind speed sensor works

The working principle of the ultrasonic wind speed sensor is to use the ultrasonic time difference method to measure the wind speed. Because of the speed of sound in the air, it will be superimposed with the speed of the airflow in the wind direction. If the ultrasonic wave travels in the same direction as the wind, its speed will increase;

Conversely, if the propagation direction of the ultrasonic wave is opposite to the wind direction, its speed will be slower. Therefore, under fixed detection conditions, the speed of ultrasonic propagation in the air can correspond to the wind speed function. The precise wind speed and direction can be obtained by calculation.

Since the speed of a sound wave is greatly affected by temperature as it travels through the air; the wind sensor detects two opposite directions on the two channels, so the effect of temperature on the speed of the sound wave is negligible.

Ultrasonic wind speed sensor is light in weight, has no moving parts, is durable, and requires no maintenance and field calibration, and can output wind speed and wind direction at the same time. Customers can choose the wind speed unit, output frequency and output format according to their needs.

You can also choose a heating device (recommended in icy environments) or analog output as needed. It can be used with computers, data collectors or other acquisition equipment with RS485 or analog output. If necessary, multiple units can also be used to form a network.

Ultrasonic anemometer is a relatively advanced instrument for measuring wind speed and direction. Because it overcomes the inherent defects of mechanical anemometers well, it can work normally all-weather and long-term, and is used more and more widely. It will be a strong replacement for mechanical anemometers.