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Artificial rainfall simulation system and method with adjustable rainfall space distribution

A technology of artificial simulation and spatial distribution, applied in teaching models, program control in sequence/logic controllers, instruments, etc., can solve the problems that the rainfall intensity cannot be controlled in real time over time, and the spatial distribution of rainfall cannot be adjusted, etc., to achieve The effect of uniform rainfall intensity, rich diversity and convenient operation

Inactive Publication Date: 2020-11-27
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a system and method for artificially simulating rainfall with adjustable spatial distribution of rainfall, which solves the problem that the spatial distribution of rainfall in artificial rainfall systems in the prior art cannot be adjusted and the intensity of rainfall cannot be controlled in real time with time. question

Method used

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  • Artificial rainfall simulation system and method with adjustable rainfall space distribution
  • Artificial rainfall simulation system and method with adjustable rainfall space distribution
  • Artificial rainfall simulation system and method with adjustable rainfall space distribution

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Embodiment

[0111] In this embodiment, the PLC controller is selected from Siemens S7-200smart series, and the range of the flow sensor 20 is 0.03-2m 3 / h, connected with EM AM06 analog configuration module 15 through two-wire 4-20mA current signal; take 2 for Osh, 0.03 for Osl, 27648 for Ish, and 5530 for Isl;

[0112] In this embodiment, the operating frequency of the frequency converter is 0-50HZ, and is connected to the EM AM06 analog configuration module 15 through a two-wire 0-10V voltage signal; Osh is 50, Osl is 0, Ish is 27648, Isl take 0;

[0113] The transfer function of the PID controller in the step S4 is:

[0114]

[0115] Among them, K P is the proportional parameter, K I is the integral parameter, K D is the differential parameter;

[0116] In the embodiment, the control accuracy is required to be within 3 seconds, refer to debugging K P =8.59,K I =12.5, K D =1.77 meets the requirement;

[0117] The invention discloses a system and method for artificially simul...

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Abstract

The invention discloses an artificial simulated rainfall system and method with adjustable rainfall space distribution. The system comprises a rainfall module, the rainfall module is connected with awater supply module, the water supply module is used for providing a water source for the rainfall module and connected with a control module, and the control module is used for controlling the flow of the water supply module to control the rainfall process of the rainfall module. The rainfall module adopts a mode of splicing a plurality of rainfall plates, and each rainfall plate is provided witha plurality of needle heads, so that the rainfall intensity in a single rainfall plate is uniform; each rainfall plate is provided with an independent valve, the opening degree of the valves is adjusted according to the relation between the rainfall intensity and the valves through calibration before the test, rainfall space distribution is adjustable, and then the diversity of the rainfall rangeis enriched. The control module achieves automatic control over the whole rainfall process through a closed-loop control system composed of a computer, a PLC and a variable-frequency water pump; andthe operation is convenient, so that errors caused by manual adjustment are reduced.

Description

technical field [0001] The invention relates to the technical field of artificial rainfall simulation equipment, and relates to an artificial rainfall system and method with adjustable spatial distribution of rainfall. Background technique [0002] Rainfall is one of the important factors that cause frequent urban waterlogging disasters. With the continuous acceleration of the urbanization process, the rapid expansion of the city and the intensification of the urban heat island effect, the large-scale area of ​​the big city will inevitably lead to the uneven spatial distribution of rainfall. construction is of great significance. Effective use of artificial rainfall system to reproduce natural rainfall for urban rain and flood experiments is an ideal method for studying urban waterlogging problems. This method can accurately control the experimental rainfall process, shorten the experimental period, and save a lot of manpower and material resources. [0003] At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05G09B25/00
CPCG05B19/05G09B25/00
Inventor 侯精明李轩龚佳辉高徐军康永德李东来潘占鹏石宝山石佳王俊珲张大伟杨霄张阳维李钰茜杨东张玉蓉
Owner XIAN UNIV OF TECH
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