A composite range wind speed measuring device and method

Abstract

The invention discloses a multi-ranged wind speed measuring device and method. The device comprises a first elastomer, an upper ball, a second elastomer, a lower ball, a top cover, a bottom cover, anelastomer fixing bolt and an upper and lower cover bracket. The method comprises the following steps: under a weak wind speed, the lower ball swings firstly, a two-axis inclination angle sensor measures the inclination angle of the lower ball, and based on a different inclination angle, the size and the direction of the current wind speed are calculated; when the wind speed is large, the upper ball swings, the wind speed range measured at the time is relatively large, and the measurement precision of a large wind speed is ensured; the lower ball is internally provided with a light emitting source, irradiation right below through a small hole in the bottom part of the lower ball is carried out, when the lower ball is still, the light comes out to right irradiate on a photosensitive device through a small hole in the cover plate, and the zero positions of the first elastomer and the second elastomer are corrected. The problem of low measurement precision in the case of a weak wind speedcan be solved, a wind speed smaller than 0.1 mm / s can be measured, a wind speed more than 30 m / s can also be measured, and the measurement accuracy is ensured.

Description

technical field [0001] The invention relates to the technical field of agricultural climate, in particular to a composite range wind speed measuring device and method. Background technique [0002] In agricultural production, wind speed plays an important role in regulating farmland climate and crop production. Appropriate wind speed can help pollination of cross-flowered crops, increase seed setting rate, improve farmland microclimate, etc. Excessive wind speed will cause crop threshing and mechanical damage , lodging, falling flowers and fruits, etc. Taking advantage of the beneficial effect of wind on agriculture, precision agriculture can be realized by measuring wind speed. [0003] The current wind speed measurement devices mainly include hot wire anemometer, ultrasonic anemometer, impeller anemometer, pitot tube anemometer and so on. The hot wire anemometer uses a temperature-sensitive resistance wire. During the measurement process, the resistance wire is heated. U...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a composite range wind speed measuring device and method, which can solve the problem of low measurement accuracy when the wind speed is weak, and can measure wind speeds less than 0.1mm / s and 30m / s The wind speed above s, and can guarantee the accuracy of the measurement

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