CN-121995761-A - Digital twinning-oriented farmland environment regulation and control method and system

CN121995761ACN 121995761 ACN121995761 ACN 121995761ACN-121995761-A

Abstract

The invention relates to the technical field of intelligent control and discloses a digital twinning-oriented farmland environment regulation and control method and system, wherein the method comprises the steps of collecting surface soil permeability, middle layer root system distribution density and deep water retention of a farmland, simulating and deducing a water longitudinal conduction path based on the surface soil permeability, dynamically calibrating path attenuation characteristics of the water longitudinal conduction path based on a real-time transpiration coefficient, generating path attenuation parameters, dividing a water absorption area level of the middle layer root system distribution density, calculating dynamic priority parameters based on the path attenuation parameters, analyzing real-time difference of the dynamic priority parameters and the deep water retention, generating regional irrigation compensation weights, matching regional node coordinates of the farmland based on the regional irrigation compensation weights, and outputting opening gradient control instructions of the farmland; the invention can solve the problems of water resource waste and poor regulation effect caused by the fact that the existing farmland irrigation method cannot dynamically match the difference of water space needed by crops.

Inventors

ZHU YUANCAI
FAN TING
XU MEI

Assignees

上海牛叮草农业科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260211

Claims (10)

1. A digital twinning-oriented farmland environment regulation method, characterized in that the method comprises: S1, collecting the surface soil penetration rate, middle root system distribution density and deep water retention of a farmland; S2, simulating and deducting a water longitudinal conduction path of the farmland based on the surface soil permeability, dynamically calibrating path attenuation characteristics of the water longitudinal conduction path based on a preset real-time transpiration coefficient, and generating path attenuation parameters of the water longitudinal conduction path; s3, dividing the water absorption area level of the middle-layer root system distribution density, and calculating the dynamic priority parameter of the water absorption area level based on the path attenuation parameter; s4, analyzing the real-time difference of the dynamic priority parameter and the deep water retention, and generating a regional irrigation compensation weight of the farmland; And S5, outputting the opening gradient control instruction of the farmland based on the fact that the partitioned irrigation compensation weight is matched with the partitioned node coordinates of the farmland.
2. The digital twinning-oriented farmland environment control method according to claim 1, wherein the collecting of the surface soil penetration rate, the middle root system distribution density and the deep water retention of the farmland comprises: acquiring surface soil moisture data of the farmland in real time according to a soil moisture sensor, and calculating to obtain the surface soil permeability rate of the farmland; Acquiring a middle-layer root system distribution image of the farmland through an underground root system scanning imaging device, extracting root system density characteristics of the middle-layer root system distribution image, and generating middle-layer root system distribution density of the farmland; And continuously monitoring the deep water retention of the farmland through a deep soil water probe.
3. The method for digital twinning-oriented farmland environment regulation and control according to claim 2, wherein the step of simulating and deducing a moisture longitudinal conduction path of the farmland based on the surface soil permeability and dynamically calibrating path attenuation characteristics of the moisture longitudinal conduction path based on a preset real-time transpiration coefficient to generate path attenuation parameters of the moisture longitudinal conduction path comprises the following steps: constructing a digital twin model of water conduction of the farmland; Inputting the surface soil permeability into the water conduction digital twin model, and simulating to generate an initial water longitudinal conduction path of the farmland; Calculating the crop transpiration of the farmland based on the real-time meteorological data of the farmland, and converting the crop transpiration into a real-time transpiration coefficient of the farmland; And carrying out attenuation dynamic calibration on the initial moisture longitudinal conduction path based on the real-time transpiration coefficient, and generating path attenuation parameters of the moisture longitudinal conduction path.
4. The digital twinning-oriented farmland environment control method according to claim 1, wherein the dividing the water absorption zone level of the middle layer root system distribution density and calculating the dynamic priority parameter of the water absorption zone level based on the path attenuation parameter comprises: clustering and dividing the distribution density of the middle-layer root system according to the density threshold value of the farmland, and determining the water absorption area level of the distribution density of the middle-layer root system; And carrying out coupling analysis on the path attenuation parameter and the root density of the water absorption region level, and coupling to obtain the dynamic priority parameter of the water absorption region level.
5. The digital twinning-oriented farmland environment regulation and control method of claim 4, wherein the calculation formula of the dynamic priority parameter is: Wherein, the As a parameter of the dynamic priority level, Level of water absorption zone The number of indices of the set is, As a logarithmic function based on the natural number e, As a function of the index of the values, Is the first The root density normalization value of each water absorption area, For the attenuation coefficient in the path attenuation parameters, For the irrigation time interval of the farmland, For the soil diffusion correction coefficient, For the real-time transpiration coefficient, Is the historical average transpiration coefficient.
6. The digital twinning-oriented farmland environment regulation method of claim 5, wherein said coupling analysis comprises: Converting the path attenuation parameter into a moisture supply capacity evaluation value of the water absorption zone level; converting the root system density into a water demand intensity evaluation value of the water absorption area level; Determining a coupling coefficient for calculating the dynamic priority parameter according to the moisture supply capacity evaluation value and the moisture demand intensity evaluation value; the coupling coefficient includes the attenuation coefficient and the soil diffusion correction coefficient.
7. The digital twinning-oriented farmland environment control method of claim 1, wherein said analyzing the real-time difference between the dynamic priority parameter and the deep water retention to generate the zoned irrigation compensation weight of the farmland comprises: normalizing the dynamic priority parameter and the corresponding deep water retention, and calculating to obtain a real-time water difference coefficient of the water absorption area level; determining the real-time irrigation demand intensity of the water absorption area level based on the comparison between the real-time moisture difference coefficient and the water demand threshold of the farmland; And determining the regional irrigation compensation weight of the farmland according to the real-time irrigation demand intensity and the water holding capacity parameter of the farmland.
8. The digital twinning-oriented farmland environment regulation method of claim 1, wherein the matching of the partitioned node coordinates of the farmland based on the partitioned irrigation compensation weights, outputting the opening gradient control instruction of the farmland, comprises: Dividing an irrigation area of the farmland into a plurality of irrigation grids, and enabling each irrigation grid to correspond to a partition node coordinate; Distributing irrigation intensity values to the irrigation grids according to the subarea irrigation compensation weights and the subarea node coordinates; And outputting an opening gradient control instruction of the farmland based on the irrigation intensity value, and controlling the opening of an irrigation valve of the farmland.
9. The digital twinning oriented farmland environment regulation and control method of claim 7, wherein said generating zoned irrigation compensation weights for said farmland further comprises: comparing the real-time moisture difference coefficient with the effective soil water holding capacity of the farmland to obtain a basic compensation quantity of the farmland; performing staged correction on the basic compensation quantity based on a preset crop growth cycle coefficient to generate corrected compensation quantity of the farmland; and carrying out distribution optimization on the corrected compensation quantity according to the uniformity parameters of the irrigation system of the farmland, and generating the regional irrigation compensation weight of the farmland.
10. A digital twinning oriented farmland environment regulation system for implementing a digital twinning oriented farmland environment regulation system according to any one of claims 1-9, said system comprising: The soil profile acquisition module is used for acquiring the surface soil penetration rate, the middle-layer root system distribution density and the deep water retention of the farmland; the moisture conduction calibration module is used for simulating and deducing a moisture longitudinal conduction path of the farmland based on the surface soil permeability, dynamically calibrating the path attenuation characteristic of the moisture longitudinal conduction path based on a preset real-time transpiration coefficient, and generating the path attenuation parameter of the moisture longitudinal conduction path; The root system priority evaluation module is used for dividing the water absorption zone level of the middle-layer root system distribution density and calculating the dynamic priority parameter of the water absorption zone level based on the path attenuation parameter; The regional compensation analysis module is used for analyzing the real-time difference between the dynamic priority parameter and the deep water retention and generating regional irrigation compensation weights of the farmland; and the zone control generation module is used for outputting the opening gradient control instruction of the farmland based on the fact that the zone irrigation compensation weight is matched with the zone node coordinates of the farmland.

Description

Digital twinning-oriented farmland environment regulation and control method and system Technical Field The invention relates to the technical field of intelligent control, in particular to a digital twinning-oriented farmland environment regulation and control method and system. Background In the prior art, most systems rely on soil parameters with single or limited dimensions to carry out irrigation decisions, and lack collaborative sensing and integrated analysis on multi-level moisture dynamics of soil profile, root system distribution structure and moisture conduction path attenuation characteristics. The method generally adopts a static or semi-static irrigation model, and cannot introduce a real-time meteorological data-driven dynamic transpiration calibration mechanism, so that the simulation precision of the longitudinal farmland moisture migration process is insufficient, and the actual supply and demand states of crop root zone moisture cannot be accurately reflected. Because the dynamic attenuation calibration of the water conduction path based on the soil permeability and the real-time transpiration coefficient cannot be realized, hysteresis and deviation often exist when the irrigation demand is predicted in the existing system, real-time and accurate water management in the true sense is difficult to support, and the problems of low water resource utilization efficiency and poor regulation and control of crop growth environments are caused. In addition, the existing irrigation control method is mostly based on fixed partition or uniform irrigation strategies, and lacks a mechanism for dynamic priority assessment and partition compensation according to root system density distribution and water retention difference. Even if partial systems try to introduce partition control, the system also depends on a simple threshold value or historical experience, a coupling analysis model between the level of the root system water absorption area and the moisture conduction attenuation cannot be constructed, and a partition irrigation compensation weight generation method based on dynamic priority and real-time moisture difference is not formed. This results in the irrigation performance not matching the actual water spatial distribution of the crop and the partial overspray and underspray phenomena coexist. Therefore, development of a digital twin-oriented farmland environment regulation and control method and system capable of integrating soil multi-parameter collaborative collection, dynamic simulation of a water transfer path, intelligent evaluation and zonal accurate regulation and control of a root system water absorption zone is needed to realize real mapping and closed-loop optimization control of a farmland water migration process, so that irrigation precision, water resource utilization efficiency and crop growth environment regulation and control level are improved. Disclosure of Invention The invention provides a digital twinning-oriented farmland environment regulation and control method and system, and mainly aims to solve the problems in the background technology. In order to achieve the above purpose, the invention provides a digital twinning-oriented farmland environment regulation method, which comprises the following steps: S1, collecting the surface soil penetration rate, middle root system distribution density and deep water retention of a farmland; S2, simulating and deducting a water longitudinal conduction path of the farmland based on the surface soil permeability, dynamically calibrating path attenuation characteristics of the water longitudinal conduction path based on a preset real-time transpiration coefficient, and generating path attenuation parameters of the water longitudinal conduction path; s3, dividing the water absorption area level of the middle-layer root system distribution density, and calculating the dynamic priority parameter of the water absorption area level based on the path attenuation parameter; s4, analyzing the real-time difference of the dynamic priority parameter and the deep water retention, and generating a regional irrigation compensation weight of the farmland; And S5, outputting the opening gradient control instruction of the farmland based on the fact that the partitioned irrigation compensation weight is matched with the partitioned node coordinates of the farmland. Preferably, the method collects the surface soil penetration rate, the middle root system distribution density and the deep water retention of the farmland, comprising the following steps: acquiring surface soil moisture data of the farmland in real time according to a soil moisture sensor, and calculating to obtain the surface soil permeability rate of the farmland; Acquiring a middle-layer root system distribution image of the farmland through an underground root system scanning imaging device, extracting root system density characteristics of the middle-layer root system distributio