Ultrasonic wind speed sensors: get wind data accurately and quickly
In many occasions ultrasonic wind speed sensor can be used, for example, in the field of meteorology wind measurement has an important research value, in the field of industry and science also has a wide range of applications, accurate measurement of wind speed on human production and life will have a certain role. There are many kinds of instruments to measure wind speed, such as wind cup anemometer, thermal anemometer, ultrasonic anemometer and so on. With the development of technology, various fields have higher and higher requirements for the instrumentation of wind speed measurement, including volume, speed, power consumption and so on.
Compared to traditional wind speed and direction sensors the advantages of ultrasonic wind speed sensors include: no rotating mechanical parts, so there is no wear and tear and freezing of mechanical parts due to icing, no start-up wind speed, fast response time, wide measurement range, and the output is linear over the range of the wind speed range with high accuracy. Ultrasonic wind speed sensor is the use of ultrasonic time difference method to achieve the measurement of wind speed. The propagation speed of sound in the air will be superimposed with the airflow speed in the wind direction. If the propagation direction of the ultrasonic wave is the same as the wind direction, its speed will be accelerated; on the contrary, if the propagation direction of the ultrasonic wave if opposite to the wind direction, its speed will be slowed down. Therefore, under fixed detection conditions, the speed of ultrasonic wave 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 sound wave propagating in the air is greatly affected by temperature; this anemometer detects two opposite directions on two channels, so the effect of temperature on the speed of sound wave is negligible.
Based on the above application, we recommend an exemplary product in the field of ultrasonic wind measurement, the French LCJ Capteurs Ultrasonic Wind Sensor - CV7-OEM, the ultrasonic wind sensor is lightweight, without any moving parts, rugged, and requires no maintenance and field calibration, and can simultaneously output wind speed and direction. and wind direction at the same time.
The transducer uses sound (and ultrasonic waves) transmitted through the movement of the fluid it passes through. Electroacoustic transducers use ultrasonic signals to communicate with each other in pairs, determining the time difference in wave propagation caused by airflow based on orthogonal axes.The CV7-OEM transducers communicate with each other to provide four independent measurements, while the headwind measurement vector is used for calculation. The wind speed and direction relative to the reference axis are calculated by combining these measurements. Temperature measurements are used for calibration. The design of the sensor reduces the effect of inclination (based on the shape of the space, the effect of sensor inclination is partially corrected). At the same time the CV7___ OEM ultrasonic wind speed sensor provides 4 independent test data. A correctness check is used for the calculation of the head wind vector. This method provides a wind sensitivity of 0.15 m/s, reliability and excellent linearity up to 40 m/s. Customers can select the wind unit, output frequency and output format as required.
