The force of the wind can be measured using a weather vane. A weather vane is an asymmetrically shaped object whose center of gravity is fixed on a vertical axis. When the wind blows, the end that creates greater resistance to airflow will rotate with the wind, indicating the direction of the wind. The metal weather vane consists of six parts: weather vane, wind wheel, tail fin, movable mast, main mast and base. The main part is made of high quality stainless steel; the fan blades are made of high-quality engineering plastics with strong corrosion resistance; the movable rod part is made of high-quality stainless steel double sealed bearings, which have high sensitivity, low wind start speed and durability. Weather vanes are easy to install and transport and are widely used in meteorological and chemical industries, mining areas, agricultural productioncole, oilfield exploration, wind power generation and other industries.
Principle:
When the wind direction reaches a certain angle with the weather vane, the wind exerts pressure on the weather vane. This force can be broken down into two parallel wind forces. and perpendicular to the weather vane. Since the wind receiving area of the weather vane head is relatively small and the wind receiving area of the tail is relatively large, the felt wind pressure is not equal. Wind pressure perpendicular to the tail produces wind pressure. moment, rotating the weathervane around the vertical axis until the head of the weathervane faces the wind. When the weather vane is pointing in the direction of the weather vane, the weather vane is stable in a certain direction due to the forces on both. the sides of the wing plate are balanced.
The arrow of the weather vanealways points you towards the source of the wind. The principle is actually very simple: the wind receiving area of the tail of the arrow is larger than the tip of the arrow. and the tail of the arrow are subject to the wind, the tail of the arrow will be pushed back by the wind, causing the arrow to move towards the source of the wind. The weather vane is installed on a high pole in order to record the wind direction more accurately, the wind direction should be measured for 10 seconds with a compass at the bottom of the pole (the wind direction should be stable at this time) .
To make a wind turbine from a car generator, the speed of 120 rpm is far from sufficient. You need to reach at least 800 to 1000 rpm to produce electricity. If you do not modify the generator and want to use it as a wind turbine, you need to increase the transmission ratio of the transmission gear. The higher it is, the better. , because vYou are the car's charging system and the system will automatically adjust. Yes, there will be no problem. You want the car engine to be running at least several thousand rpm at high speed and the generator will have no problems. The only thing you care about is whether the pneumatic system, bracket and transmission assembly you made can withstand the test under strong winds, haha