The working principle and advantages of ultrasonic wind speed sensor

A sound wave is a form of sound. Sound wave is a kind of mechanical wave, which is generated by the vibration of an object (sound source). The frequency of sound waves that the human ear can hear is generally between 20 Hz and 20,000 Hz. Ultrasound is a sound wave with a frequency higher than 20,000 Hertz. It has good directivity, strong penetration ability, easy access to concentrated sound energy, and long propagation distance in water. It can be used for ranging, speed measurement, cleaning, welding, crushing, sterilization and other fields. At present, there is a well-known "ultrasonic wind measurement" in the field of ultrasonic applications. The so-called "ultrasonic wind measurement" is the application of ultrasonic detection technology in the gas medium, using the influence of air flow (wind) on the speed of ultrasonic propagation in the air to measure the wind speed. As a kind of meteorological measuring device, wind speed sensor is used to measure the direction and size of wind, and has been widely used in all walks of life.

The working principle of ultrasonic wind speed sensor

Ultrasonic wind speed sensor This instrument uses ultrasonic time difference method to measure wind speed. The speed at which sound travels through the air is superimposed on the speed of the air flow in the wind. If the ultrasonic wave travels in the same direction as the wind direction, its speed will increase; In contrast, if the ultrasonic wave travels in the opposite direction of the wind, its speed will be slower. Therefore, under fixed detection conditions, the ultrasonic propagation speed in the air can correspond to the wind speed function. Accurate wind speed and direction can be obtained by calculation. Because when sound waves travel through the air, their speed is greatly affected by temperature; The anemometer detects two opposite directions on two channels, so the effect of temperature on the speed of sound is negligible.

Advantages of ultrasonic wind speed sensor

Compared with similar equipment, ultrasonic wind speed sensors applied in the field of meteorology can measure more accurate wind speed change information with higher accuracy under different meteorological environments, and the response time of ultrasonic sensors is also higher than that of similar equipment. When it is necessary to measure the change in the ambient temperature without temperature measuring equipment, the ultrasonic wind speed sensor can also measure the change in the ambient temperature at this time, which is the advantage of the ultrasonic wind speed sensor.