Impeller anemometer

The utility model relates to an impeller anemograph which comprises a main machine, a detection head is arranged at the output end of the main machine, a display screen and keys are arranged on the surface of the main machine, a shading assembly for shading sunlight for the display screen is arranged on the surface of the main machine, and the shading assembly comprises a U-shaped support with anopening facing the display screen. The two ends of the support are located on the left side and the right side of the display screen and hinged to the main machine, a mounting groove is formed in themain machine in the length direction of the display screen, the mounting groove is located above the display screen, a cloth winding shaft arranged in the length direction of the display screen is rotationally connected into the mounting groove, and one end of the cloth winding shaft penetrates out of the main machine and is wound with shading cloth. One end of the shading cloth penetrates out ofthe surface of the main mac