Anemometer - meaning (English)
What is an anemometer (short definition) An Anemometer is an instrument with which the wind can be determined. Windmill with hemispheres This instrument was introduced in 1846 by the Irish astronomer Thomas Romney Robinson (1792-1882). This instrument is a rotating windmill with three or four hemispheres (cups) with a rotating shaft rods to be confirmed. The axis is approximately perpendicular to the direction of the wind measurement. The hemispheres are hollow inside. If there are only three hemispheres then they are present prepared at 120° apart. The windmill will rotate because the wind on the concave side exerts more than on the convex side. The motion of the rotating balls through the ashes transform into a dynamo with an electrical voltage signal. The rotation speed of the wind speed are derived. This wind speed is expressed in meters per second or kilometers per hour. Paddle wheel Another form of an anemometer is used to measure the speed of the air (mine shafts, air ...