The purpose of the wind vane is to indicate the wind direction and provide a wind speed reference. Widely used in meteorology, chemical, mining, agriculture, oilfield exploration and other industries.
The wind vane is an instrument that measures the direction of the wind. It is usually installed on a pole that is about 10 meters high and is about to be separated from the ground. Under the action of wind pressure, the wind vane arrow refers to the direction of the wind. It is generally divided into three parts: the head, the horizontal pole and the tail.
Principle
When the direction of the wind is marked with the wind direction at an angle, the wind exerts pressure on the wind vane, which can be broken down into two winds that are parallel and perpendicular to the wind vane. Because the wind direction head is relatively small in wind area, the wind receiving area of The tail is relatively large, so the perceived wind pressure is not equal. The wind pressure perpendicular to the tail produces a wind pressure moment, so that the wind direction rotates around the vertical axis until the wind head is right against the wind. When the direction comes, the wind vane is stable in a certain position due to the balance of the two sides of the wing.
The arrow of the wind vane always points to the source of the wind. The principle is actually very simple: the area of The wind is larger than the arrow. If the arrow and the tail are both affected by the wind, the tail will be pushed by the wind, and the arrow will be moved to the source of the wind. The wind vane is placed on the high pole. In order to make the wind direction record more accurate, the wind direction must be measured with a compass at the bottom of the pole for 10 seconds (the wind direction must be stable at that time).
Wind Sensor 