CN-121970674-A - Data analysis-based intelligent control method for water conservation of garden irrigation

CN121970674ACN 121970674 ACN121970674 ACN 121970674ACN-121970674-A

Abstract

The application relates to the technical field of irrigation control, in particular to a data analysis-based intelligent control method for water conservation in garden irrigation, which comprises the steps of collecting the water content of soil in an irrigation area of the garden at each moment and the irrigation water quantity at each moment during irrigation; the method comprises the steps of obtaining a water content deviation value of each moment, obtaining an irrigation response matching degree deviation degree of a target moment according to the correlation of the water content deviation value of each moment and a first-order difference sequence of irrigation water quantity in an analysis period, judging whether irrigation control behaviors are abnormal according to the irrigation response matching degree deviation degree, obtaining a deviation fluctuation risk index and a deviation evolution certainty index if the irrigation control behaviors of the target moment are abnormal, obtaining an integral parameter item of the target moment by utilizing the deviation fluctuation risk index, the deviation evolution certainty index and integral item parameters of a moment above the target moment, and controlling irrigation of an irrigation area by utilizing the integral parameter item of each moment in combination with a PID controller. The application can save irrigation water consumption.

Inventors

ZHANG XIN
ZHANG YUJIAO
WANG CHUNHONG
ZHANG XIUMING
XU YANXIA
YU YONGBO
BI HAN
ZHANG YING

Assignees

济南泉森绿化设计有限公司

Dates

Publication Date: 20260505
Application Date: 20260324

Claims (7)

1. The intelligent control method for water conservation of garden irrigation based on data analysis is characterized by comprising the following steps: Collecting the water content of soil at each moment in an irrigation area of gardens and the irrigation water quantity at each moment in irrigation, and acquiring the water content deviation value at each moment by utilizing the water content at each moment and the set water content; The method comprises the steps of recording a period of time which is cut off to a preset time length of a target time as an analysis period, acquiring the deviation degree of irrigation response matching degree of the target time according to the correlation between a first-order differential sequence of the water content deviation value of each time in the analysis period and a first-order differential sequence of the irrigation water quantity of each time; Acquiring a deviation fluctuation risk index according to the difference of the water content deviation values of every two adjacent moments in the analysis period if the irrigation control behavior at the target moment is abnormal; Acquiring an integral parameter item of the target moment by using the deviation fluctuation risk index, the deviation evolution deterministic index and the integral item parameter of the last moment of the target moment; and controlling irrigation of the irrigation area by utilizing integral parameter items at each moment and combining a PID controller.
2. The intelligent control method for water saving in irrigation of gardens based on data analysis of claim 1, wherein the obtaining the deviation value of the water content at each moment by using the water content at each moment and the set water content comprises: subtracting the water content at one moment from the set water content to obtain a water content deviation value at the moment.
3. The intelligent control method for water saving in irrigation of a garden based on data analysis according to claim 1, wherein the step of obtaining the degree of deviation of the degree of matching degree of the irrigation response at the target time according to the correlation between the first order difference sequence of the deviation value of the water content at each time and the first order difference sequence of the irrigation water quantity at each time in the analysis period comprises the steps of: Subtracting the normalized value of the pearson correlation coefficient of the first order difference sequence of the water content deviation value at each moment and the first order difference sequence of the irrigation water quantity at each moment in the analysis period by using a first preset value, and multiplying the normalized value by an irrigation gating function to obtain the degree of deviation of the irrigation response matching degree at the target moment, wherein the irrigation gating function is as follows , And (3) taking the irrigation water quantity at the target moment as the irrigation water quantity at the target moment, if the irrigation water quantity at the target moment is larger than 0, taking the value of the irrigation gating function as1, and if the irrigation water quantity at the target moment is equal to 0, taking the value of the irrigation gating function as 0.
4. The intelligent control method for water conservation in irrigation in a garden based on data analysis according to claim 1, wherein the step of judging whether the irrigation control behavior is abnormal according to the degree of deviation of the degree of matching of the irrigation response comprises the steps of: if the degree of deviation of the irrigation response matching degree at the target moment is larger than the reference threshold, the irrigation control behavior at the target moment is abnormal.
5. The intelligent control method for water conservation in garden irrigation based on data analysis according to claim 1, wherein the obtaining the deviation fluctuation risk index according to the difference of the water content deviation values at every two adjacent moments in the analysis period comprises: The method comprises the steps of recording differences of water content deviation values of two adjacent moments in an analysis period as deviation differences, forming a deviation difference sequence by the deviation differences corresponding to each two adjacent moments in the analysis period according to a time sequence, obtaining the ratio of the absolute value of one deviation difference in the deviation difference sequence to the sum of the absolute values of all deviation differences in the deviation difference sequence as the weight of the deviation difference, carrying out weighted summation and normalization on squares of each deviation difference by utilizing the weight of each deviation difference to obtain weighted variation cumulative fluctuation, constructing a direction change judging function, wherein independent variables of the direction change judging function are products of each two adjacent deviation differences in the deviation difference sequence, if the products are nonnegative numbers, the values of the direction change judging function are 0, if the products are negative numbers, the values of the direction change judging function are 1, respectively carrying out the function value corresponding to each two adjacent deviation differences in the deviation difference sequence, averaging function values corresponding to each two adjacent deviation differences to obtain fluctuation frequency, and adding the weighted variation cumulative fluctuation and the risk of fluctuation frequency to obtain the risk of the weighted variation cumulative fluctuation.
6. The intelligent control method for water conservation in garden irrigation based on data analysis according to claim 1, wherein the obtaining the deviation evolution certainty index by utilizing the change condition of the water content deviation value corresponding to each inflection point in the water content deviation values at each moment in the analysis period comprises: The method comprises the steps of forming a water content deviation value corresponding to each inflection point in water content deviation values at each moment in an analysis period into an inflection point sequence according to a time sequence, recording the difference value of the water content deviation values of two adjacent inflection points in the inflection point sequence as the inflection point deviation difference of the two inflection points, forming the inflection point deviation difference sequence according to the time sequence by using the inflection point deviation difference corresponding to each two adjacent inflection points in the inflection point sequence, respectively bringing the inflection point deviation difference corresponding to each two adjacent inflection point in the inflection point deviation sequence into a direction change judging function to obtain function values corresponding to each two adjacent inflection point deviation differences, and averaging the function values corresponding to each two adjacent inflection point deviation differences to obtain a deviation evolution deterministic index.
7. The intelligent control method for water saving in irrigation of garden based on data analysis according to claim 1, wherein the obtaining the integral parameter item of the target moment by using the deviation fluctuation risk index, the deviation evolution deterministic index and the integral parameter item parameter of the last moment of the target moment comprises: and subtracting the first preset value from the first preset value and multiplying the first preset value by an integral term parameter of the last moment of the target moment to obtain an integral parameter term of the target moment.

Description

Data analysis-based intelligent control method for water conservation of garden irrigation Technical Field The invention relates to the technical field of irrigation control, in particular to a data analysis-based intelligent control method for water conservation in garden irrigation. Background With the continuous expansion of urban landscaping scale, irrigation of gardens has become an important component of urban water. On the premise of meeting the normal growth requirement of plants, the irrigation process is finely regulated, so that the plant growth state and the landscape effect are directly influenced, and more importantly, the water resource consumption caused by invalid water and repeated irrigation can be reduced. In existing irrigation systems, irrigation is usually managed in a zoned or block manner, subject to the influence of the garden area, the terrain conditions, the plant species and the manner in which the irrigation facilities are laid. The garden green land is divided into a plurality of irrigation areas, and each area is internally provided with a corresponding soil moisture sensor and an irrigation executing device for independently collecting soil moisture content data in the area and executing irrigation control operation. Specifically, the target water content of the soil is generally used as a control set value, and the proportional-integral-derivative PID controller outputs irrigation control quantity according to the deviation between the current water content of the soil and the target water content, and the irrigation control quantity is used for adjusting the irrigation water quantity so that the water content of the soil gradually approaches the target value, and the irrigation process is controlled in a closed loop. In the actual garden irrigation process, the change of the soil moisture content is influenced by multiple factors such as irrigation behavior, physical properties of the soil and environmental conditions, and the like, the situation that the stage is not matched between the soil moisture state and an irrigation control instruction can occur, for example, the irrigation water is still in the infiltration and diffusion process in the initial stage of the starting of an irrigation system or in the stage just started of continuous irrigation, the moisture content data collected by a soil moisture sensor are still kept at a lower level, the evaporation rate of the soil surface layer is obviously increased in a short time under the influence of climatic conditions such as high temperature, strong sunlight or high wind speed, and the local evaporation intensity is inconsistent in a garden area due to the difference of shading conditions, so that the improvement effect of irrigation water on the soil moisture content in unit time is partially counteracted or delayed, the collected soil moisture data is still lower than the expected change level in a short time, the situation that the change of the soil moisture content is delayed in response, the change is slow and the accumulation effect is more prominent relative to the irrigation control instruction under the influence of the specific stage factors, and the collected soil moisture data has delay or deviation in time sequence and value. Under the condition, in a garden irrigation mode controlled by the PID controller, an integral term accumulates the deviation to eliminate steady-state errors, and when the deviation is prolonged in stages due to insufficient feedback of irrigation effect or interference of environmental factors, the integral term is easy to excessively accumulate historical deviation, so that a larger irrigation control amount is continuously output in a subsequent control process, the condition that the irrigation water amount exceeds the actual demand of plants is easy to be caused, and the water-saving control effect of garden irrigation is influenced. On one hand, excessive irrigation increases the water consumption in unit time, reduces the overall water consumption efficiency of a garden irrigation system, is unfavorable for realizing a water-saving target, and on the other hand, soil is in a high-water-content state for a long time, so that the normal growth environment of plant roots is possibly influenced, the maintenance management difficulty is increased, the operation load of irrigation equipment is increased, the operation cost of the system is increased, and the stability and the economy of the garden irrigation control are influenced. Disclosure of Invention In order to solve the technical problems, the invention aims to provide a data analysis-based intelligent control method for water conservation of garden irrigation, which adopts the following technical scheme: The embodiment of the invention provides a data analysis-based intelligent control method for water conservation in garden irrigation, which comprises the following steps: Collecting the water content of soil at each momen