Multi-channel flow ratio control method, system and application

A control method and multi-channel technology, applied in various fluid ratio control, control/regulation system, ratio control, etc., can solve the problem that the EC value adjustment of the mixed solution cannot be automatically adjusted by the fertilization ratio

Pending Publication Date: 2021-07-30
LUOYANG INTELLIGENT AGRI EQUIP RES INST CO LTD
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Problems solved by technology

[0003] At present, the flow ratio of multiple channels of the multi-channel water and fertilizer machine is mostly controlled by manual mode, which cannot realize the automatic adjustment of the fertilization ratio of each channel and the adjustment of the EC value of the total mixed solution

Method used

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  • Multi-channel flow ratio control method, system and application
  • Multi-channel flow ratio control method, system and application
  • Multi-channel flow ratio control method, system and application

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specific Embodiment 1

[0067] Specific embodiment 1: Taking the 3-channel water and fertilizer integrated machine as an example, the EC value after fertilizer mixing and the fertilization ratio of each channel can be controlled. System structure such as Figure 4 As shown in the figure, the installation method of the water and fertilizer integrated machine and irrigation supervisor is shown in the figure for reference.

[0068] It can be seen from the above figure that the system of the present invention can be divided into the main irrigation system and the integrated water and fertilizer system, and the main irrigation system is not included in the integrated water and fertilizer system. The water and fertilizer all-in-one machine introduces water flow from the rear end of the main pipe fertilizer mixing chamber 18, and performs fertilizer mixing while sampling. The fertilizer liquid in the fertilizer barrel passes through the Venturi tube 10 of each channel for fertilizer mixing, and then enters...

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Abstract

In order to overcome the defects in the prior art, the invention provides a multi-channel flow ratio control method which comprises the following steps that an EC value of a multi-channel output solution is collected; according to the EC value, fuzzy control PID is adopted to control the opening degree of a pipeline valve with the maximum proportion in the multiple channels; and according to the EC value, incremental PID is adopted to control the instantaneous flow of the valves except the maximum-proportion pipeline valve in the multiple channels. Double-closed-loop control is adopted, the inner loop controls the fertilization proportion of each fertilization channel, incremental PID control is adopted, only deviation sampling values of the current moment and the first two moments are needed, and the calculated amount and the storage amount are small; the EC value of a water and fertilizer mixed solution is controlled in an outer loop, fuzzy control PID is adopted, and parameters of the fuzzy control PID are optimized in real time by utilizing fuzzy logic according to a certain fuzzy rule, so that the defect that traditional PID parameters cannot be adjusted in real time is overcome.

Description

technical field [0001] The invention relates to the field of water and fertilizer integration, in particular to a multi-channel flow ratio control method, system and application. Background technique [0002] Water and fertilizer integration is a water-saving agricultural technology that uses pipeline irrigation systems to dissolve fertilizers in water, irrigate and fertilize at the same time, meet the needs of crops for water and nutrients in a timely and appropriate manner, and realize the simultaneous management and efficient use of water and fertilizer. The constraint of water and fertilizer resources has become a bottleneck factor restricting the sustainable development of agriculture, and promoting the integration of water and fertilizer has become a key measure to improve the efficiency of water and fertilizer use, transform the mode of agricultural development, and alleviate the shortage of water resources. [0003] At present, the flow ratio of multiple channels of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D11/13A01C23/00
CPCG05D11/139A01C23/007
Inventor 陈新奇张飞飞刘伊博陈泉江
Owner LUOYANG INTELLIGENT AGRI EQUIP RES INST CO LTD
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