Briefly describe the measurement principle of ultrasonic wind speed sensor

Ultrasonic wind speed sensor is an intelligent instrument with convenient use, good characteristics and high reliability. It can be widely used to measure wind speed in greenhouses, environmental protection, weather stations and breeding sites. There are many types of ultrasonic wind transducer for ultrasonic wind vane anemometer. The key can be divided into Pitot tube wind speed sensors, aircraft propeller wind speed sensors, Hall effect electromagnetic induction wind speed sensors, hotline wind speed sensors and their ultrasonic wind speed sensors. The following is a simple and detailed introduction to the principle of the ultrasonic wind speed sensor for everyone.

Compared with the traditional wind speed sensor, the piezoelectric ultrasonic transducer for ultrasonic anemometer has the advantages of good measurement precision and multiple functions, and its camera has a very simple structure. It replaces the traditional wind speed and direction sensor in many main applications. Therefore, people will choose this type of controller for some suburban work.

The key of the ultrasonic wind speed sensor is to use the ultrasonic time difference method to maintain the wind speed measurement. The rapid propagation of sound in the gas will accumulate the cyclone speed in the wind direction. If the spreading direction of the ultrasonic wave is the same as the wind direction, its speed will accelerate; for oneself, its speed will be very slow. Therefore, under the fixed inspection standard, the speed at which the ultrasonic wave spreads in the gas can match the number of wind speed. According to the calculation, the wind speed and wind direction can be obtained.

The basic principle of changing through the pressure difference

Set a fixed roadblock (orifice plate, sprinkler head, etc.) on the orientation of the theme activity, so that a pressure difference will occur depending on the water flow. After measuring the pressure difference, it can be converted into the measurement of water flow.