The word "wind vane" originally meant a device for measuring the direction of the wind, and was later extended to mean the development trend and direction of something. Its basic meaning is similar to a trend that leads the development of something.
A wind vane is a device used to determine the direction of the wind. A weather vane is basically an asymmetrically shaped object with its center of gravity fixed on a vertical axis. When the wind blows, the end that creates greater resistance to air flow will rotate with the wind, indicating the direction of the wind. The metal wind vane consists of six parts: wind vane, wind wheel, tail fin, moving rod, main rod and base. The main part is made of high-quality stainless steel. The fan blades are made of high-quality engineering plastics and have strong corrosion resistance. The moving rod part is made of high-quality double stainless steel and is waterproof. The bearing has high sensitivity, low starting wind speed, and is durable; the product is easy to install and transport, and is widely used in meteorology, chemical industry, mining areas, agriculture, oil field exploration and other industries.
Extended information:
Wind vane principle
When the direction of the wind intersects with the wind vane at a certain angle, the wind exerts pressure on the wind vane. This force can be decomposed into parallel and two wind forces perpendicular to the wind vane. Since the wind-receiving area of the wind vane head is relatively small and the wind-receiving area of the tail is relatively large, the wind pressure felt is not equal. The wind pressure perpendicular to the tail produces a wind pressure moment, causing the wind vane to rotate around the vertical axis until the wind vane head is facing the wind. When the wind vane is coming in the direction of the wind vane, the wind vane is stable in a certain direction because the forces on both sides of the wing plate are balanced.
The arrow of the weather vane always points to the source of the wind. The principle is actually very simple: the wind-receiving area of the arrow tail is larger than the arrowhead. If both the arrowhead and the arrow tail are subject to wind, the arrow tail will be pushed back by the wind, causing The arrow moves to the source of the wind. The wind vane is installed on a high pole. In order to make the wind direction record more accurate, a compass must be used at the bottom of the pole to measure the wind direction for 10 seconds (the wind direction must be stable at that time). The wind vane is installed on a high pole. In order to make the wind direction record more accurate, the wind direction must be measured for 10 seconds with a compass at the bottom of the pole (the wind direction must be stable at that time).
Baidu Encyclopedia-Wind Vane (a device for determining the direction of the wind)
Baidu Encyclopedia-Wind Vane (extended meaning-indicating the development direction of something)
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It is very simple to install. First install the machine head on the base pole (there is a screw on the back to fix it), then install the rear protective cover. Pay attention to the outside.Put the handle directly above, then install the fan blade (the fixed front end is turned in the opposite direction), and then install the front cover. There should be an instruction manual for this, right? If you follow the instruction manual, you won’t go wrong.