What is an anemometer?

1. Wind cup anemometer

It is the most common type of anemometer. The cup-rotating anemometer was first invented by Rubinson, England. At that time, it was four cups, and later it was changed to three cups. The three parabolic or hemispherical empty cups that are fixed to each other on the frame are all along one side, and the entire frame and the wind cup are mounted on a freely rotating shaft. The wind cup rotates around its axis under the action of wind, and its speed is proportional to the wind speed;

2. Propeller anemometer

It is an anemometer with a set of three-blade or four-blade propellers rotating around a horizontal axis. The propeller is installed on the front of a weathervane so that its rotating plane is always facing the direction of the wind anemometer, and its speed is proportional to the wind speed;

3. Pressure anemometer

The pressure effect of wind (wind pressure is inversely proportional to the square of the wind speed) to measure wind speed;

4. Thermal anemometer

Use the characteristic that the heat dissipation rate of the heated object has nothing to do with the surrounding air velocity to measure the wind speed;

5. Acoustic anemometer

Use the functional relationship between the speed of sound waves in the atmosphere and the wind speed to measure wind speed;

6. Ultrasonic anemometer
A wind speed and direction measuring instrument that uses the sending of sound pulses to measure the difference in time or frequency at the receiving end to calculate wind speed and direction.