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Water-saving irrigation method and system based on fuzzy logic control theory

A technology of control theory and fuzzy logic, applied in control/regulation systems, non-electric variable control, botanical equipment and methods, etc., can solve problems such as inability to accurately establish models, complexity, and low utilization of irrigation water.

Inactive Publication Date: 2019-08-09
ANHUI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the existing technical problems, the present invention provides a water-saving irrigation method and water-saving irrigation system based on fuzzy logic control theory, which solves the problems of low utilization rate of irrigation water and inconspicuous irrigation effect in the existing irrigation methods. Moreover, the combination of fuzzy logic control theory and traditional feedback control can effectively solve the problems existing in irrigation systems that are too complex to accurately model. The parameter adjustment mechanism through fuzzy reasoning and closed-loop feedback can achieve precise control of irrigation. The low-power long-distance transmission advantages of LoRa technology can be used to reduce the transmission power consumption of irrigation control systems

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  • Water-saving irrigation method and system based on fuzzy logic control theory
  • Water-saving irrigation method and system based on fuzzy logic control theory
  • Water-saving irrigation method and system based on fuzzy logic control theory

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Embodiment 1

[0079] In order to avoid the waste of water resources when irrigating crops in the prior art, this embodiment provides a water-saving irrigation method based on fuzzy logic control theory. The water-saving irrigation method of this embodiment is designed for large-scale, large-scale operation of farmland. In the choice of irrigation method, the method of drip irrigation can be selected in practice. Using the drop tank method, although the short-term investment is large, the long-term benefits are high, and it is easy to combine with the modern automation mode. According to the environmental requirements of the farmland, the large-scale and large-scale farmland is divided into several areas, and pipelines are laid on the farmland.

[0080] see figure 1 , The pipelines laid in farmland include dry pipes, branch pipes and capillary pipes. The main pipe is the main pipe, which is generally buried underground and laid for a long distance, directly connected to irrigation water s...

Embodiment 2

[0122] This embodiment provides a water-saving irrigation method based on fuzzy logic control theory, which specifically describes the calculation method of water irrigation amount on the basis of Embodiment 1. Among them, the calculation method of water irrigation is realized through fuzzy control algorithm. The fuzzy control algorithm in this embodiment is used in conjunction with the fuzzy control system.

[0123] like Figure 4 As shown, the soil moisture suitable for the normal growth and development of crops is taken as the given value r, that is, the minimum value of soil water content required by crops is taken as the given value r. Among them, the system design takes cucumber planting as an example to start the description.

[0124] Mark the soil moisture collected in real time as y, then the input variables of the fuzzy control system are soil moisture error e=r-y, the rate of change of soil moisture error ec=d / dt, and the output variable u is the length of irrigatio...

Embodiment 3

[0175] This embodiment proposes a water-saving irrigation system based on fuzzy logic control theory, which is used in conjunction with the water-saving irrigation method based on fuzzy logic control theory in Embodiment 1.

[0176] The water-saving irrigation system based on fuzzy logic control theory of the present embodiment adopts a closed-loop decision model based on adaptive fuzzy logic, and the design of the closed-loop decision model includes the following six parts:

[0177] ① Determine the input variable of the fuzzy logic controller, that is, the current soil moisture error and the rate of change of the error; the output variable is the control amount irrigation time length.

[0178] ②Use the fuzzy PID control principle and the membership function of each language variable obtained in combination with the characteristics of the irrigation system to make a fuzzy control rule table for eliminating errors.

[0179] ③Use triangular fuzzy sets to fuzzify precise input qu...

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Abstract

The invention discloses a water-saving irrigation method and system based on a fuzzy logic control theory. The water-saving irrigation method comprises the following steps of 1, acquiring first growthinformation data of crops in a current stage; comparing the first growth information data with a fuzzy control rule table to inquire the water amount required by the crops in the current stage; judging whether or not the required water amount is greater than the minimum value of the soil water content in the current stage; if yes, calculating the water irrigation amount required by the crops andsending an irrigation instruction; waking up terminal nodes in a dormant state to irrigate the crops; judging whether or not the soil humidity in the current area reaches the water irrigation amount in real time; if yes, driving the corresponding terminal nodes to stop irrigation and switching the terminal nodes into the dormant state, or if not, enabling the corresponding terminal nodes to continue irrigation. According to the system, quantitative irrigation is carried out according to the actual demands of the crops, the phenomenon of water resource waste is effectively avoided, and the utilization rate of irrigation water is increased.

Description

technical field [0001] The invention relates to an irrigation method in the technical field of agricultural irrigation, in particular to a water-saving irrigation method based on fuzzy logic control theory, and also to a water-saving irrigation system based on fuzzy logic control theory. Background technique [0002] The agricultural irrigation system is a complex nonlinear system. It is impossible to complete the efficient use of water resources in my country only by a single water-saving irrigation technology. It is necessary to consider the soil entropy, the environmental information of the crops, and the water demand of the crops in a unified way to achieve timely, timely and efficient irrigation. Automatic water supply and irrigation on demand. At present, the technologies used in domestic irrigation systems mainly include: [0003] 1. The farmland water-saving irrigation system supported by geographic information system (GIS), which is quite time-consuming in processin...

Claims

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Application Information

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IPC IPC(8): A01G25/16G05D27/02
CPCA01G25/165A01G25/167G05D27/02
Inventor 徐磊顾飞龙葛道城张红伟方红雨李晓辉
Owner ANHUI UNIVERSITY
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