Cup anemometer working principle

Cup anemometers work based on the driving force of the wind on the cup. When the anemometer is placed in the air, the wind force acts on the wind cup and causes it to start rotating. The speed of rotation of the wind cup is directly proportional to the wind speed. By measuring the speed of rotation of the cup, a measurement of wind speed can be derived.

Cup anemometers usually consist of three cups and a rotating shaft. The shaft is mechanically connected to the cups so that when the cups rotate, the shaft also rotates. The shaft is usually fitted with a gear fitted with a magnet. When the cup rotates, the gear rotates and the magnet changes its magnetic field. There is usually a magnetic susceptor on the bottom of the wind cup anemometer that senses the change in magnetic field. The magnetic susceptor measures the speed at which the gears are rotating and converts it into an electrical signal. This electrical signal is processed to get a measurement of the wind speed.

There are also cup anemometers that utilize an electric blower to drive a rotor to rotate, and the wind speed is deduced by measuring the rotor speed. This type of anemometer is generally used in fields such as meteorological observation and environmental monitoring.

Overall, regardless of the type of cup anemometer, the core principle is to utilize the driving force of the wind on the cup to measure wind speed.

The main uses of cup anemometers include:

1. Meteorological observations: Cup anemometers are widely used in weather stations and meteorological observations to measure wind speed in the atmosphere. These data are important for weather forecasting, climate research, and a variety of environmental applications.

2. Engineering applications: In engineering, cup anemometers are used to monitor the conditions of wind farms, e.g. to evaluate wind loads in building design, to monitor wind speed in wind farms, etc.

3. Environmental monitoring: Cup anemometers are also used in environmental monitoring, e.g. in air quality monitoring to understand the effect of wind speed on air dispersion.

In summary, cup anemometers have important applications in a variety of fields, providing critical meteorological and environmental data by measuring wind speed to help people better understand and adapt to the natural environment.

Cup anemometer data sheet

NBL-W-SS-Wind-Speed-Sensors-Instruction-Manual-V4.0.pdf