| 摘要 |
An oscillatory anemometer for simultaneously indicating wind speed and direction employs a main member free to rotate under the influence of aerodynamic forces about a first axis and a fin mounted near the downwind end of the main member for pivotal movement about a parallel axis betwen two stable positions. The fin swings between the stable positions forcing the main member through inertial overshoot into oscillation about a mean alignment with the wind direction. The frequency of main member oscillation is linearly proportional to wind speed.
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