Water drop diameter measuring method

Abstract

The invention discloses a water drop diameter measuring method. The water drop diameter measuring method is as follows: obtaining the maximum length L and the maximum width W of the projection of a water drop to be measured on a light intensity sensing array according to the refraction and attenuation of light caused by water drops; obtaining an array element with the maximum light intensity attenuation in the projection of the water drop to be measured on the light intensity sensing array; and obtaining the thickness H of the water drop to be measured according to the thickness calculating formula of the water drop. As the water drop suffers the atmospheric drag in air, the water drop becomes ellipsoidal, and then the volume of the ellipsoidal water drop to be measured can be obtained according to the L, the W and the H, the volume of the ellipsoidal water drop to be measured can be converted into the volume of a sphere, and then the diameter of the water drop to be measured can be obtained. The water drop diameter measuring method has the advantages that the simplicity is achieved, the model of the water drop is more similar to various water drops in real life, and the measuringis more accurate. The method can be applied to the fields of observing the influence on freezing caused by the water drop, observing the influence on growth of crops caused by the size water rainwater, and the like, so that more accurate data can be provided for the research of the fields.

Description

technical field [0001] This patent relates to the fields of optical engineering, data signal processing, software engineering, etc. Specifically, it is a method for measuring the diameter of low-speed sparse water droplets with low measurement speed, long distances from each other, and no mutual influence. Background technique [0002] The methods for measuring the diameter of water droplets mainly include: stain method, flour method, laser method, photography method, immersion method, etc. The color spot method and the photography method are widely used methods for measuring the diameter of water droplets. Both methods use the assumption that the size of the color spot formed by the water droplet on the same material is proportional to the diameter of the water droplet. The relationship between the diameter of the stain, and then infer the diameter of the water droplet by measuring the size of the stain formed by the water droplet on filter paper, printing paper, photograph...

AI Technical Summary

Problems solved by technology

Both methods have the same part, which is to judge the diameter of the water droplet according to the circumference of the water droplet, without considering the thickness direction

The actual situation is that when water droplets move in the air, due to the effect of air resistance, they often form an ellipsoid. In order to improve the accuracy, the diameter of the water droplets cannot be completely considered as a sphere.

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