A method and device for controlling the diameter and distribution of raindrops in artificially simulated rainfall
A technique for artificially simulating and simulating rainfall, which is applied to measuring devices, testing of machine/structural components, soil testing, etc., can solve the problems of ineffective control of raindrop distribution, inaccurate control of rainfall characteristics, poor representation, etc., to achieve strong Practicality and reliability, low cost, improved accuracy and representative effects
Active Publication Date: 2019-06-04
CHINA AGRI UNIV
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Problems solved by technology
[0003] At present, there are some shortcomings in the rainfall simulation technology at home and abroad. The artificial rainfall simulation device is not accurate enough to control the rainfall characteristics, and cannot effectively control the distribution of raindrops.
In addition, the existing artificial rainfall simulation devices mainly change the rain intensity by adjusting the system pressure. Because the nozzles in most rainfall devices have atomization effect, when the rainfall intensity increases, the raindrops become smaller, and when the rainfall intensity decreases, the raindrops become larger. It is exactly the opposite of the change law of natural rainfall raindrops and rain intensity, resulting in poor representativeness of a large number of experimental results based on artificial rainfall simulation technology
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[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0021] The present invention proposes a method for controlling the diameter and distribution of raindrops in artificially simulated rainfall, the method comprising the following steps:
[0022] 1) According to the raindrop spectrum of the rainfall to be simulated, the raindrops of the rainfall are divided into multiple specifications, each specification corresponds to a range of raindrop diameters, and the proportion of raindrops of each specification is calculated, and the corresponding raindrops of each specification are obtained Median value of the diameter range.
[0023] 2) set a support frame 1 (such as Figure 1~3 As shown), the top of the support frame 1 is provided with a plurality of placement grooves 2 distributed in a matrix.
[0024] 3) produce the raindrop generation plate 3 that quantity is equal to the number of placement grooves 2, ...
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The invention relates to a method and device for controlling raindrop diameter and distribution in artificial rainfall simulation. The method comprises the following steps: (1) dividing raindrops into multiple specifications according to a raindrop profile, calculating the proportion of the raindrops of each specification, and obtaining a medium value of the diameter range of the raindrops of each specification; (2) setting a supporting frame, and arranging a plurality of accommodating grooves distributed in a matrix form; (3) producing raindrop generating plates with the same number of the accommodating grooves, determining the number of the raindrop holes of each specification formed in each of the raindrop generating plates, and using the obtained medium value as the diameter of the raindrop holes of each specification; (4) randomly forming the raindrop holes of each specification in the raindrop generating plates by using perforating equipment; (5) randomly installing the perforated raindrop generating plates in the accommodating grooves of the supporting frame, and connecting the side wall of the supporting frame and vibration generating equipment; and (6) hanging the supporting frame below an artificial rainfall simulation device, and starting the vibration generating equipment when the artificial rainfall simulation device operates.
Description
technical field [0001] The invention relates to a method and a device for controlling the diameter and distribution of raindrops in artificially simulated rainfall, and belongs to the technical field of artificially simulated rainfall. Background technique [0002] Artificial rainfall simulation is an important technical means to study surface hydrological process, soil erosion process, law of water and soil loss, and soil and water conservation measures and benefits. Before the 1960s, the United States began to study artificial rainfall simulation technology, and developed various rainfall simulation technologies such as downspray, side spray, and rotary. Subsequently, through continuous research on natural rainfall patterns, the control of rainfall droplet size, rainfall intensity and rainfall duration has been gradually realized, making artificial rainfall simulation technology gradually mature and widely used around the world. Since the 1980s, my country has begun to ca...
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IPC IPC(8): G01N33/24G01M10/00
CPCG01M10/00G01N33/24
Inventor 王伟顾建康
Owner CHINA AGRI UNIV