Wind speed and its measurement method
The atmosphere of the Earth is constantly moving. There are vertical movements and horizontal movements. There are ascent movements in vertical movements and sinking movements; horizontal movements are called winds. The wind not only has speed, but also has direction. At the same time, the direction and speed must be used to express the characteristics of the wind. Wind direction refers to the direction of the wind, often represented by 8 or 16 positions. The characters and symbols recorded are: North (N), North North East (NNE), Northeast (NE), Northeast East (ENE), East ( E) Southeast East (ESE), Southeast (SE), South South East (SSE), South (S), South South West (SSW), Southwest (SW), Southwest West (WSW), West (W), Northwest West (WNW ), Northwest (NW), North North West (NNW). If it is represented by an angle, then North is represented by 0° and then clockwise, plus 22.5° in each direction. Thus, 90° is East, 180° South, and 270° West.
Above we mainly introduced the concept of wind direction. Below we mainly analyze the wind speed. Wind speed refers to the distance traveled by air during a unit of time. It is often expressed in meters per second, kilometers per hour, or nautical miles per hour. The conversion relationship between them is: 1m/s = 3.60km/h = 1.94nm/h; 1km/h = 0.54nm/h = 0.28m/s; 1nm/h = 0.51 m/s = 1.85 km/h; the wind pressure in the building sector indicates the wind pressure p (in kilograms per meter, wind pressure p and wind speed v) in an area of ​​one square meter perpendicular to the wind direction. The relationship is: p = 0.125 V2. A wind level is usually determined based on the degree of influence of the wind on the surface (or surface) object. British Beaufort formulates the wind class table in 1805 and has revised it since 1946. There are 18 levels, and people still use it now.
Wind direction and wind speed have important applications in the agricultural field. In meteorological testing, timely and accurate broadcast of wind direction and wind speed conditions are conducive to people's timely response to agricultural work. The wind direction wind speed monitor is specifically for measuring wind speed and wind direction. The instrument connects two sensors and can sense the wind direction and wind speed at the same time. At the same time, the measurement mode can be freely selected during the measurement: automatic mode, manual mode and computer lock mode. The wind direction wind speed monitor is also sometimes referred to simply as the wind direction anemometer. It has a powerful data storage function and can simultaneously store 30000 pieces of data and delete it differently. So don't worry about not having enough memory. Wind anemometer is the most common instrument in meteorological testing and occupies a certain position in this field.
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Describle:
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