Working principle of ultrasonic wind speed sensor
The working principle of the ultrasonic wind speed sensor is to use the ultrasonic time difference method to realize the measurement of wind speed. 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 the sound wave is greatly affected by the temperature when it propagates in the air; the wind speed sensor detects two opposite directions on the two channels, so the influence of the temperature on the speed of the sound wave is negligible.
The ultrasonic wind speed sensor has the characteristics of light weight, no moving parts, strong and durable, and does not require maintenance and on-site 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. A heating device (recommended for use in freezing environments) or an analog output can also be selected as required. It can be used in conjunction with computers, data collectors or other acquisition devices with RS485 or analog output. If necessary, multiple units can also form a network for use.
Ultrasonic anemometer is a relatively advanced instrument for measuring wind speed and direction. Because it overcomes the inherent defects of the mechanical anemometer, it can work normally all the time and for a long time, and is more and more widely used. It will be a powerful replacement for mechanical anemometers.
Ultrasonic wind speed sensor features:
1. Acoustic phase compensation technology is adopted, with higher precision;
2. Using random error identification technology, it can ensure low discrete error of measurement even under strong wind, so that the output is more stable;
3. The measurement and compensation technology for drizzle and dense fog weather has stronger environmental adaptability;
4. Digital filtering technology, stronger ability to resist electromagnetic interference;
5. No start-up wind speed limit, zero wind speed work, suitable for indoor breeze measurement, no angle limit (360° omnidirectional), and wind speed and wind direction data at the same time;
6. High measurement accuracy; stable performance; low power consumption without calibration;
7. The structure is firm, the instrument has strong corrosion resistance, and there is no need to worry about damage during installation and use;
8. Flexible design, lightweight, portable, easy to install and disassemble;
9. The signal access is convenient, and both digital and analog signals are provided;
10. No maintenance and on-site calibration required, real 0~359° work (no dead angle).
