| Cup anemometer is a wind measured sensor which is applied widely. It has the advantages of a large measurement range, high intensity and resistance to corrosion. The cup is mostly determined by experience and experiment, which is the main component of now widely used anemometer to measure the wind. There is no perfect theory to follow. We are not sure which parameters will affect the linearity (the relationship between rotation speed of anemometer and wind speed) of the cup, the degree of effect and what the main parameter is.The geometrical structure and the gyroidal radius were optimized with reasonable material selection to discover what parameters will affect the linearity and dynamic response characteristics of the cup, based on which the cup will be designed with a better linearity. Besides, the dynamic characteristics of the anemometer were improved to measure the wind well and truly, which will offer the foundation of theory for the application and maintenance of Three-Cup Anemometer.The cup in the atmosphere was simulated via the flow visualization software ADINA. The motion characteristics of the cups with different structure were deduced via changing the parametric structures, such as the gyroidal radius and the orifice diameter. The parametric structures which will affect the dynamic and static characteristics of the cup were analyzed.Changchun Weather Instrument Institute wants to change the cup's material and dimension of anemometer EC9-1 to improve its dynamic and static characteristics, which were related with the moment of inertia. The moment of inertia of the cup was measured via Three-Line-Wrest method so as to validate the result gotten through Pro/E software. Finally, the dynamic and static characteristics with different moment of inertia were deduced via wind tunnel experiment after changing the parametric structures of the cup, which will validate the result of the simulation. |
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