Wind speed refers to the speed at which air moves relative to a fixed location on Earth. The common unit is m/s, 1 m/s = 3.6 km/h. Wind speed has no ratings, only wind power has ratings. Wind speed forms the basis for wind energy classification. Generally speaking, the higher the wind speed and level, the more destructive the wind. Wind speed is one of the main parameters in climate research. Atmospheric wind measurement plays an important role and importance in global climate change research, aerospace industry and military applications. Wind has both size and direction. Therefore, wind forecasting includes wind speed and direction. The magnitude of wind speed is often expressed as wind level. Wind levels are determined based on the degree of wind impact on objects.ts on the ground. Meteorologically, winds are generally divided into seventeen levels according to their strength. In weather forecasts, you often hear terms like “north wind level 4 to 5,” which refers to the strength of the wind at that time. If you hear terms like “gust level 7,” gust refers to wind speed. the wind is strong and weak. The wind strength at this time refers to the strength of the strong wind.
Indeed, in nature, the wind force sometimes exceeds level 12. For example, the wind force at the center of a strong typhoon or tornado can be much stronger than the level 12. However, strong winds above level 12 are relatively rare and usually the level is not specified. Cup anemometer. This is the most common type of anemometer. The rotating cup anemometer was first invented by the British J.T.R. Robinson (1846). At the time he usedfour cups, then moved to three cups. Three parabolic or hemispherical empty cups fixed on the bracket at 120 degrees from each other are aligned on one side, and the entire bracket and the wind cup are mounted on a shaft that can rotate freely. The wind cup rotates around its axis under the action of the wind force, and its rotation speed is proportional to the wind speed. The rotational speed can be recorded using electrical contacts, tachometer generators or photoelectric meters. Propeller anemometer. It is an anemometer with a set of propellers with three or four blades rotating around a horizontal axis. The propeller is mounted on the front of a weather vane so that its plane of rotation always faces the direction of the wind and its speed of rotation is proportional to the wind speed. Hot wire anemometer.