Garden drip irrigation water-saving control method and system

Abstract

The present invention provides a method and system for water-saving control of garden drip irrigation, which relates to the technical field of garden drip irrigation. The method includes: obtaining first flow rate data of the main water supply pipeline and second flow rate data of each branch water supply pipeline, obtaining moisture content data and location information of multiple planting areas at the start and end times of the current monitoring period, and then determining whether the second flow rate data of each branch water supply pipeline needs to be adjusted according to the moisture content data and location information of the multiple planting areas, and determining the adjusted second flow rate data and the first flow rate data. At the start of the next monitoring period, the valves of the target branch water supply pipeline and the main water supply pipeline are adjusted. According to the present invention, by comprehensively considering the moisture content, moisture change amount in the planting area and the water flow rate of the water supply pipeline, the water flow rate of the water supply pipeline in the next cycle is adjusted, while ensuring the efficiency of garden drip irrigation and improving the utilization rate of water resources.

Description

Technical Field

[0001] The present invention relates to the technical field of garden drip irrigation, and in particular to a garden drip irrigation water-saving control method and system Background Art

[0002] In the related art, CN109526701B discloses a drip irrigation control method, including: obtaining the temperature parameter, humidity parameter, water demand parameter and irrigation quota parameter of the object to be drip-irrigated, calculating the drip irrigation control probability value according to the pre-trained drip irrigation control prediction function and the temperature parameter, humidity parameter, water demand parameter and irrigation quota parameter of the object to be drip-irrigated, and when it is determined that the drip irrigation control probability value is greater than or equal to a preset threshold, turning on the drip irrigation corresponding to the object to be drip-irrigated

[0003] CN117502197A discloses a pressure balance control device for a drip irrigation pipe network system for farmland irrigation, including a water belt, with a water outlet pile valve installed at the end, and the water outlet pile valve is used to control the water supply to the inside of the water belt and is installed on the water outlet pile. Pressure gauges for measuring the water flow pressure and flow rate in the water belt are installed at the front end of the water belt close to the water outlet pile valve and at the end far from the water outlet pile valve. In this solution, by setting a booster pipe on the water belt, the water flow inside the water belt is used to push the swing blades inside the booster pipe, so that the swing blades rotate about the connecting shaft. When multiple groups of swing blades rotate, a stable water flow can be generated in the booster pipe and the water belt, and the pressure at one end of the water belt close to the water outlet pile valve and the end far from the water outlet pile valve tends to be consistent, which can play a role in making the irrigation uniform and helping farmers increase production and income

[0004] Therefore, in the related art, the working efficiency of garden drip irrigation is getting higher and higher, and it can realize automatic water supply from the water supply pipeline to each planting area. However, in the work of garden drip irrigation, the change of the water flow in the water supply pipeline is not considered, resulting in inaccurate control of the drip irrigation water volume, and further causing problems such as waste of water resources or insufficient irrigation

[0005] The information disclosed in the background art part of the present application is only intended to deepen the understanding of the general background art of the present application, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art Summary of the Invention

[0006] The embodiments of the present invention provide a garden drip irrigation water-saving control method and system, which can solve the technical problem of difficult to accurately control the water volume of drip irrigation, and further cause waste of water resources or insufficient irrigation

[0007] According to the first aspect of the embodiments of the present invention, a garden drip irrigation water-saving control method is provided, including:

[0008] Obtain the first flow rate data of the main water supply pipeline in the current monitoring period, and the second flow rate data of each branch water supply pipeline;

[0009] At the start and end times of the current monitoring period, obtain the moisture content data at multiple positions in the planting areas where the plants are planted along the branch water supply pipelines. One drip outlet of the branch water supply pipeline conducts drip irrigation for one planting area, the planting area is a cubic area, and the drip outlet is directly above the centroid of the cubic area;

[0010] According to the moisture content data and the serial numbers of each planting area, determine whether the second flow rate data of each branch water supply pipeline needs to be adjusted, where the serial numbers of the planting areas increase sequentially in the water flow direction in the branch water supply pipeline;

[0011] If there is a target branch water supply pipeline whose second flow rate data needs to be adjusted, determine the adjusted second flow rate data of the target branch water supply pipeline in the next monitoring period according to the moisture content data;

[0012] Determine the adjusted first flow rate data of the main water supply pipeline according to the adjusted second flow rate data;

[0013] According to the adjusted second flow rate data of the target branch water supply pipeline and the second flow rate data, determine the adjustment parameters of the valve of the target branch water supply pipeline;

[0014] According to the adjusted first flow rate data and the first flow rate data, determine the adjustment parameters of the valve of the main water supply pipeline;

[0015] At the start of the next monitoring period, adjust the valves of the target branch water supply pipeline and the main water supply pipeline respectively according to the adjustment parameters of the valve of the target branch water supply pipeline and the adjustment parameters of the valve of the main water supply pipeline.

[0016] According to the second aspect of the embodiments of the present invention, a garden drip irrigation water-saving control system is provided, including;

[0017] A first data acquisition module that acquires the first flow rate data of the main water supply pipeline in the current monitoring period and the second flow rate data of each branch water supply pipeline;

[0018] A second data acquisition module that acquires the moisture content data at multiple positions in the planting areas where the plants are planted along the branch water supply pipelines at the start and end times of the current monitoring period. One drip outlet of the branch water supply pipeline conducts drip irrigation for one planting area, the planting area is a cubic area, and the drip outlet is directly above the centroid of the cubic area;

[0019] A data adjustment determination module determines whether the second flow rate data of each branch water supply pipeline needs to be adjusted according to the moisture content data and the serial numbers of each planting area, wherein the serial numbers of the planting areas increase sequentially in the water flow direction in the branch water supply pipeline;

[0020] A first data determination module, if there is a target branch water supply pipeline whose second flow rate data needs to be adjusted, determines the adjusted second flow rate data of the target branch water supply pipeline in the next monitoring period according to the moisture content data;

[0021] A second data determination module determines the adjusted first flow rate data of the main water supply pipeline according to the adjusted second flow rate data;

[0022] A first parameter determination module determines the adjustment parameter of the valve of the target branch water supply pipeline according to the adjusted second flow rate data of the target branch water supply pipeline and the second flow rate data;

[0023] A second parameter determination module determines the adjustment parameter of the valve of the main water supply pipeline according to the adjusted first flow rate data and the first flow rate data;

[0024] A valve adjustment module adjusts the valves of the target branch water supply pipeline and the main water supply pipeline respectively according to the adjustment parameters of the valves of the target branch water supply pipeline and the adjustment parameters of the valves of the main water supply pipeline at the beginning of the next monitoring period.

[0025] Technical effect: According to the present invention, the first flow data of the main water supply pipeline in the current monitoring period and the second flow data of each branch water supply pipeline can be obtained. At the start and end times of the current monitoring period, the moisture content data and location information of multiple planting areas are obtained, and then according to the fitting relationship between the moisture content data and the location information of the multiple planting areas, it is determined whether the second flow data of each branch water supply pipeline needs to be adjusted, and the adjusted second flow data and first flow data are determined. Then, at the beginning of the next monitoring period, the valves of the target branch water supply pipeline and the valves of the main water supply pipeline are adjusted. During the adjustment process, the changes in the water flow in the water supply pipeline are fully considered, so that the work of garden drip irrigation is more intelligent and precise, the utilization rate of water resources is improved, and the probability of insufficient irrigation is reduced. When determining the moisture content function of the planting area, the moisture change in the planting area during the current monitoring period can be determined based on the first moisture content function at the start time of the current monitoring period and the second moisture content function at the end time, thereby obtaining a moisture content function of the planting area that can accurately express the relationship between the moisture change in the planting area and the serial number and water flow of the planting area, so that the moisture content function of the planting area can accurately express the positive correlation between the moisture change in the planting area and the second flow data, and the negative correlation between the moisture change in the planting area and the serial number, providing an accurate data basis for saving water resources in the garden and improving drip irrigation efficiency. When setting the adjustment conditions, four conditions can be set based on various factors such as the moisture content and moisture change in the planting area along the branch water supply pipeline and the water flow of the branch water supply pipeline, so as to accurately determine whether the second flow data of the branch water supply pipeline needs to be adjusted, thereby providing a data basis for the regulation of water resources, and comprehensively considering various factors to make the regulation of water resources more accurate and objective. When setting the constraints of the optimization model, the constraints can be set in a targeted manner according to the adjustment conditions satisfied by the target branch water supply pipeline, so as to reasonably set the flow of the target branch water supply pipeline, avoid excessive flow of the target branch water supply pipeline, resulting in water resource waste, and avoid too small flow of the target branch water supply pipeline, resulting in low irrigation efficiency, so that the water supply pipeline can improve the efficiency of garden drip irrigation while saving water resources. When setting the objective function of the optimization model, the sum of multiple adjusted second flow data can be minimized, so as to improve the utilization rate of water resources while ensuring the efficiency of garden drip irrigation, so as to save water resources.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and do not limit the present invention. Other features and aspects of the present invention will become more apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other embodiments can be obtained based on these drawings;

[0028] Figure 1 Exemplarily shows a schematic flow chart of a garden drip irrigation water-saving control method according to an embodiment of the present invention;

[0029] Figure 2 Exemplarily shows a system diagram of a garden drip irrigation water-saving control system according to an embodiment of the present invention. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, rather than all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] The following will detail the technical solutions of the present invention with specific embodiments. These specific embodiments can be combined with each other, and for the same or similar concepts or processes, they may not be repeated in some embodiments.

[0032] Figure 1 Exemplarily shows a schematic flow chart of a garden drip irrigation water-saving control method according to an embodiment of the present invention. The system includes:

[0033] Step S101, obtaining first flow rate data of the main water supply pipeline in the current monitoring period, and second flow rate data of each branch water supply pipeline;

[0034] Step S102, at the start and end moments of the current monitoring period, obtaining moisture content data at multiple positions in the planting areas where the plants are planted along the branch water supply pipelines. Among them, one drip outlet of the branch water supply pipeline conducts drip irrigation for one planting area, the planting area is a cubic area, and the drip outlet is directly above the centroid of the cubic area;

[0035] Step S103, determining whether the second flow rate data of each branch water supply pipeline needs to be adjusted according to the moisture content data and the serial numbers of each planting area, where the serial numbers of the planting areas increase sequentially in the water flow direction in the branch water supply pipeline;

[0036] Step S104, if there is a target branch water supply pipeline that needs to adjust the second flow rate data, determine the adjusted second flow rate data of the target branch water supply pipeline in the next monitoring period according to the moisture content data;

[0037] Step S105, determine the adjusted first flow rate data of the main water supply pipeline according to the adjusted second flow rate data;

[0038] Step S106, determine the adjustment parameter of the valve of the target branch water supply pipeline according to the adjusted second flow rate data of the target branch water supply pipeline and the second flow rate data;

[0039] Step S107, determine the adjustment parameter of the valve of the main water supply pipeline according to the adjusted first flow rate data and the first flow rate data;

[0040] Step S108, at the beginning of the next monitoring period, adjust the valves of the target branch water supply pipeline and the main water supply pipeline respectively according to the adjustment parameters of the valves of the target branch water supply pipeline and the main water supply pipeline.

[0041] According to the garden drip irrigation water-saving control method of the present invention, the first flow rate data of the main water supply pipeline in the current monitoring period and the second flow rate data of each branch water supply pipeline can be obtained. At the beginning and end of the current monitoring period, the moisture content data and location information of multiple planting areas are obtained. Furthermore, according to the fitting relationship between the moisture content data and location information of multiple planting areas, it is determined whether the second flow rate data of each branch water supply pipeline needs to be adjusted, and the adjusted second flow rate data and the first flow rate data are determined. Then, at the beginning of the next monitoring period, the valves of the target branch water supply pipeline and the main water supply pipeline are adjusted. During the adjustment process, the change of the water flow rate in the water supply pipeline is fully considered, making the operation of garden drip irrigation more intelligent and precise, improving the water resource utilization rate, and reducing the probability of insufficient irrigation.

[0042] According to an embodiment of the present invention, in step S101, the first flow rate data of the main water supply pipeline in the current monitoring period and the second flow rate data of each branch water supply pipeline are obtained; that is, a main water supply pipeline is set up, and the main water supply pipeline supplies water to each branch water supply pipeline, and then drip irrigation is carried out on the planting area through each branch water supply pipeline. Among them, the first flow rate data of the main water supply pipeline is equal to the sum of the second flow rate data of each branch water supply pipeline.

[0043] According to an embodiment of the present invention, in step S102, at the start time and end time of the current monitoring period, moisture content data at multiple positions in the planting area where the plants planted along the branch water supply pipeline are located are obtained. Among them, a drip outlet of the branch water supply pipeline performs drip irrigation for one planting area, the planting area is a cubic area, and the drip outlet is directly above the centroid of the cubic area; the fitting relationship between the position information of multiple positions in the planting area where the plants are located and the moisture content data in the planting area can be combined to construct a fitting equation, so as to determine the relationship between the moisture content data and the position in this planting area, and thus the moisture content data at any position in this planting area can be determined.

[0044] According to an embodiment of the present invention, in step S103, according to the moisture content data and the serial numbers of each planting area, it is determined whether the second flow rate data of each branch water supply pipeline needs to be adjusted, including: determining a planting area water content function according to the moisture content data, the serial number of the planting area, and the second flow rate data; determining the adjustment condition of the second flow rate data according to the planting area water content function and the moisture content data; determining whether the second flow rate data of each branch water supply pipeline needs to be adjusted according to the adjustment condition of the second flow rate data.

[0045] According to an embodiment of the present invention, the serial numbers of the planting areas increase sequentially in the water flow direction in the branch water supply pipeline, that is, a larger serial number indicates that this planting area is more at the rear end along the branch water supply pipeline. Since some water has flowed out from the previous drip outlets, the water flow rate at the drip outlet of this planting area is smaller. A coefficient - to - be - determined equation can be constructed and solved based on the moisture content data at multiple positions, the serial number of the planting area, and the second flow rate data, and then the planting area water content function can be determined. And according to four adjustment conditions, it is determined whether the second flow rate data of each pipeline needs to be adjusted.

[0046] According to an embodiment of the present invention, determining a planting area water content function according to the moisture content data, the serial number of the planting area, and the second flow rate data includes: fitting the moisture content data at multiple positions in the planting area at the start time of the current monitoring period with the position information in the planting area to obtain a first moisture content function at the start time of the current monitoring period in each planting area; fitting the moisture content data at multiple positions in the planting area at the end time of the current monitoring period with the position information in the planting area to obtain a second moisture content function at the end time of the current monitoring period in each planting area; determining the planting area water content function according to the first moisture content function, the second moisture content function, the serial number of the planting area, and the second flow rate data.

[0047] According to an embodiment of the present invention, as described above, a fitting equation can be constructed by combining the fitting relationship between the position information of multiple positions in the planting area where the plant is located and the water content data in the planting area, for expressing the relationship between the water content data and the position in the planting area. Therefore, fitting can be performed based on the water content at the start moment of the current monitoring period at multiple positions in the planting area and the positions in the planting area to obtain a first water content function, and fitting can be performed based on the water content at the end moment of the current monitoring period at multiple positions in the planting area and the positions in the planting area to obtain a second water content function.

[0048] According to an embodiment of the present invention, determining a planting area water content function based on the first water content function, the second water content function, the serial number of the planting area, and the second flow rate data includes: determining a pending coefficient equation of the planting area water content function according to formula (1).

[0049]

[0050] wherein, f i,j,2 (x, y, z) is the second water content function of the j-th planting area along the i-th branch water supply pipeline, f i,j,1 (x, y, z) is the first water content function of the j-th planting area along the i-th branch water supply pipeline, V i,j is the range of the j-th planting area along the i-th branch water supply pipeline, (x, y, z) are the position coordinates in V i,j , F 2,i is the second flow rate data of the i-th branch water supply pipeline, and α1, α2, α3, α4, and α5 are pending coefficients; solving the pending coefficients according to the first water content function, the second water content function, and the serial number of each planting area, and the second flow rate data of each branch water supply pipeline to obtain the solution values of the pending coefficients; determining the planting area water content function according to the solution values of the pending coefficients and the pending coefficient equation of the planting area water content function.

[0051] According to an embodiment of the present invention, in formula (1), f i,j,2 (x, y, z) - f i,j,1(x, y, z) can be expressed as the difference between the second moisture content function and the first moisture content function in the j-th planting area along the i-th branch water supply pipeline during the current monitoring period. By performing an integral operation on this calculation formula, the moisture change amount in the j-th planting area along the i-th branch water supply pipeline during the current monitoring period can be obtained. The moisture change amount in the j-th planting area along the i-th branch water supply pipeline should be positively correlated with the second flow rate data of the i-th branch water supply pipeline (i.e., the water flow rate of the i-th branch water supply pipeline). The greater the second flow rate data of the i-th branch water supply pipeline, the faster the moisture content changes in the j-th planting area along the i-th branch water supply pipeline. And the moisture content change amount in the j-th planting area along the i-th branch water supply pipeline is inversely correlated with the serial number of the j-th planting area along the i-th branch water supply pipeline. The larger j is, the more rearward the planting area is along the i-th branch water supply pipeline. Then, the larger the serial number of the j-th planting area along the i-th branch water supply pipeline, and the smaller the water flow rate allocated to the j-th planting area, the slower the moisture content changes in the j-th planting area along the i-th branch water supply pipeline. By constructing a coefficient-to-be-determined equation through the above positive and inverse correlation relationships, and setting the coefficients-to-be-determined α1, α2, α3, α4, α5, the accuracy of the relationship between the moisture content in the j-th planting area along the i-th branch water supply pipeline, the second flow rate data of the i-th branch water supply pipeline, and the serial number of the planting area can be optimized. By solving the coefficient-to-be-determined equation with the first moisture content function, the second moisture content function, the serial number, and the second flow rate data of each planting area, the solution value of the coefficient-to-be-determined can be obtained, and then the moisture content function of the planting area can be determined.

[0052] In this way, the moisture change amount in the planting area during the current monitoring period can be determined based on the first moisture content function at the start time and the second moisture content function at the end time of the current monitoring period. Furthermore, a moisture content function of the planting area that can accurately express the relationship between the moisture change amount of the planting area, the serial number of the planting area, and the water flow rate can be obtained, enabling the moisture content function of the planting area to accurately express the positive correlation between the moisture change amount of the planting area and the second flow rate data, as well as the inverse correlation between the moisture change amount of the planting area and the serial number, providing an accurate data basis for saving water resources in the garden and improving the drip irrigation efficiency.

[0053] According to an embodiment of the present invention, determining the adjustment conditions of the second flow rate data based on the moisture content function of the planting area and the moisture content data includes:

[0054] According to formula (2), determine the adjustment conditions C1, C2, C3, and C4 of the second flow rate data.

[0055]

[0056] Among them, W p is the preset moisture content, n i is the number of planting areas along the i-th branch water supply pipeline, K p is the preset multiple, P p,1 is the first preset ratio, ΔW p is the preset moisture content change value, P p,2 is the second preset ratio, N min is the minimum number of cycles, if is a conditional function, α 1,A is the solution value of α1, α 2,A is the solution value of α2, α 3,A is the solution value of α3, α 4,A is the solution value of α4, α 5,A is the solution value of α5; when any one of the adjustment conditions C1, C2, C3, and C4 in the second flow data is satisfied, it is determined whether the second flow data of the i-th branch water supply pipeline needs to be adjusted.

[0057] According to an embodiment of the present invention, in the adjustment condition C1 in formula (2), represents the gap between the moisture content of the j-th planting area along the i-th branch water supply pipeline and the preset moisture content at the end of the monitoring period, and is the change value of the moisture content of the j-th planting area along the i-th branch water supply pipeline within one cycle. Therefore, represents that the moisture content of the j-th planting area along the i-th branch water supply pipeline still cannot reach the preset moisture content after K p cycles. Furthermore, by using the summation formula and the conditional function, the number of planting areas along the i-th branch water supply pipeline whose moisture content still cannot reach the preset moisture content after K p cycles is calculated. That is, if is satisfied, the conditional function value is 1, otherwise it is 0. After summation, the number of planting areas along the i-th branch water supply pipeline that meet this condition can be obtained. Therefore, can represent the proportional relationship between the number of planting areas along the i-th branch water supply pipeline whose moisture content still cannot reach the preset moisture content after K p cycles and the total number of planting areas. When the proportional relationship is higher than the first preset ratio, it means that the second flow data of the target branch water supply pipeline needs to be increased, and represents that the moisture content of the j-th planting area along the i-th branch water supply pipeline has reached the preset moisture content at the end of the current monitoring period. Therefore, It can indicate that the proportion of the planting area along the i-th branch water supply pipeline reaching the preset moisture content is lower than the second preset proportion. When the above two conditions are met, it means that the proportion of the planting area along the i-th branch water supply pipeline reaching the preset moisture content does not reach the second preset proportion, and after K p cycles, the proportion of the planting area that still cannot reach the preset moisture content is low. The water supply of this branch water supply pipeline is insufficient, and it is necessary to adjust and increase the water supply of this branch water supply pipeline.

[0058] According to an embodiment of the present invention, in the adjustment condition C2 in formula (2), represents the change amount of the moisture content in the j-th planting area along the i-th branch water supply pipeline in the current monitoring cycle. Therefore, represents that the change in the moisture content in the j-th planting area along the i-th branch water supply pipeline in the current monitoring cycle is too small. represents whether there is a planting area with too small a change in moisture content along the i-th branch water supply pipeline calculated by the summation formula and the conditional function. When this formula is not equal to 0, it means that there is at least one planting area along the i-th branch water supply pipeline with too small a change in water content, and it is necessary to adjust the water supply of the target branch water supply pipeline. And has the same meaning as above and will not be elaborated here. When the above two conditions are met, it means that the proportion of the planting area along the i-th branch water supply pipeline reaching the preset moisture content does not reach the second preset proportion, and there is a planting area with too small a change in water content. Therefore, the water supply of this branch water supply pipeline is insufficient, and it is necessary to increase the water supply of this branch water supply pipeline.

[0059] According to an embodiment of the present invention, in the adjustment condition C3 of formula (2), can indicate that the proportion of the planting area along the i-th branch water supply pipeline reaching the preset moisture content is higher than the second preset proportion, which means that the moisture content of most of the planting areas along the i-th branch water supply pipeline has reached the preset moisture content. At this time, the water supply of this branch water supply pipeline can be reduced to make the use of water resources more reasonable.

[0060] According to an embodiment of the present invention, in the adjustment condition C4 of formula (2), N min is the minimum number of cycles required for the moisture content of the planting area to reach the preset moisture content. If the number of cycles required for the moisture content of a certain planting area to reach the preset moisture content is less than this minimum number of cycles, it indicates that the water flow of the branch water supply pipeline where this planting area is located is too large, which is likely to cause waste of water resources. And It can be expressed as the water content increase in each cycle when the preset water content is reached within the minimum number of cycles, or as the fastest change rate of the water content in the j-th planting area along the i-th branch water supply pipeline. And It can be expressed that within the current monitoring cycle, the change amount of the water content in the j-th planting area along the i-th branch water supply pipeline is greater than the water content change amount corresponding to the above fastest change rate. Then It can be expressed that there is at least one planting area along the i-th branch water supply pipeline where the change rate of the water content is too fast, which is likely to cause waste of water resources. In this case, it is necessary to reduce the water supply volume of this branch water supply pipeline to improve the rationality of water resource use.

[0061] In this way, four conditions can be set based on various factors such as the water content and water content change amount of the planting areas along the branch water supply pipeline and the water flow rate of the branch water supply pipeline, so as to accurately judge whether it is necessary to adjust the second flow rate data of the branch water supply pipeline, thereby providing a data basis for the regulation of water resources. Considering multiple factors comprehensively makes the regulation of water resources more accurate and objective.

[0062] According to an embodiment of the present invention, in step S104, according to the water content data, if there is a target branch water supply pipeline that needs to adjust the second flow rate data, according to the water content data, determining the adjusted second flow rate data of the target branch water supply pipeline in the next monitoring cycle includes: determining the constraint conditions of the optimization model according to the second flow rate data of the target branch water supply pipeline, the second water content function, the planting area water content function, and the adjustment conditions of the second flow rate data satisfied by the target branch water supply pipeline; determining the objective function of the optimization model according to the second flow rate data of the target branch water supply pipeline; solving the optimization model according to the constraint conditions and objective function of the optimization model to obtain the adjusted second flow rate data of the target branch water supply pipeline in the next monitoring cycle.

[0063] According to an embodiment of the present invention, when the target branch water supply pipeline needs to adjust the second flow rate data, according to the second flow rate data of the target branch water supply pipeline, the second water content function, the water content function of the planting area, and the adjustment conditions of the second flow rate data satisfied by the target branch water supply pipeline, determining the constraint conditions of the optimization model, and then determining the objective function of the optimization model, that is, the best scheme for adjusting the water flow rate of the target branch water supply pipeline, and then solving the optimization model to obtain the optimal solution of the second flow rate data of the target branch water supply pipeline, that is, the adjusted second flow rate data of the target branch water supply pipeline in the next monitoring cycle, where the optimization model can be a nonlinear programming model or a genetic algorithm model, and the present invention does not limit this here.

[0064] According to an embodiment of the present invention, based on the second flow rate data of the target branch water supply pipeline, the second moisture content function, the planting area moisture content function, and the adjustment condition of the second flow rate data satisfied by the target branch water supply pipeline, the constraint conditions of the optimization model are determined, including: According to formula (3), the constraint conditions of the optimization model are determined.

[0065]

[0066] F 2,k +ΔF 2,k ≤F 2,max (6)

[0067] F 2,k -ΔF 2,k ≥0(7)

[0068] Wherein, F 2,k is the second flow rate data of the k-th target branch water supply pipeline, ΔF 2,k is the adjustment amount of the second flow rate data of the k-th target branch water supply pipeline, n k is the number of planting areas along the k-th branch water supply pipeline, is the second moisture content function of the n k (1 - P p,1 )-th planting area along the k-th target branch water supply pipeline, is the range of the n k (1 - P p,1 )-th planting area along the k-th target branch water supply pipeline, j max is the maximum value of the serial numbers of the planting areas that satisfy among the multiple planting areas of the k-th target branch water supply pipeline, is the second moisture content function of the (j max + 1)-th planting area along the k-th target branch water supply pipeline, is the range of the (j max + 1)-th planting area along the k-th target branch water supply pipeline, is the second moisture content function of the (j max + 2)-th planting area along the k-th target branch water supply pipeline, is the range of the (j max + 2)-th planting area along the k-th target branch water supply pipeline, is the second moisture content function of the n k -th planting area along the k-th target branch water supply pipeline, is the range of the n k -th planting area along the k-th target branch water supply pipeline, β is a preset ratio threshold F 2,k,Ais the second flow rate data after adjustment, F 2,max is the maximum value of the second flow rate data.

[0069] According to an embodiment of the present invention, in formula (3), (F 2,k +ΔF 2,k ) represents the second flow rate data of the k-th target branch water supply pipeline after adjustment, and n k (1 - P p,1 ) represents the number of planting areas along the k-th target branch water supply pipeline that meet the preset moisture content. For example, the first preset ratio P p,1 is 60%, and the number of planting areas n k along the k-th branch water supply pipeline is 10. When condition C1 is satisfied, the number of planting areas where the moisture content still cannot reach the preset moisture content after K p cycles exceeds 6. Therefore, when setting the constraint conditions, it can be set that when the 4th planting area uses the adjusted water flow rate, it can reach the preset moisture content after K p cycles, then the number of planting areas that can reach the preset moisture content after K p cycles will be greater than or equal to 4, making the water supply of this branch water supply pipeline basically sufficient. Therefore, represents the change amount of the adjusted moisture content of the n k (1 - P p,1 )th planting area along the k-th branch water supply pipeline, while represents the moisture content at the end of the current monitoring cycle in the n k (1 - P p,1 )th planting area, represents that after adjusting the second flow rate data, the moisture content of the n k (1 - P p,1 )th planting area reaches the preset moisture content after K p cycles. Since the water flow rate received by the planting areas at the rear end along the k-th branch water supply pipeline is less than the water flow rate received by the planting areas at the front end along the k-th branch water supply pipeline, the moisture content of the planting areas before the n k (1 - P p,1 )th planting area along the k-th branch water supply pipeline can also reach the preset moisture content, so as to solve the problem that the water flow rate of the target branch water supply pipeline is small, and the moisture content of some planting areas along the target branch water supply pipeline still cannot reach the preset moisture content after multiple cycles.

[0070] According to an embodiment of the present invention, in formula (4), when condition C2 is satisfied, It means that after adjusting the second flow rate data of the k-th target branch water supply pipeline, the water content change of the n-th k planting area of the k-th target branch water supply pipeline is higher than the preset water content change, and the n-th k planting area is the last planting area along the k-th target branch water supply pipeline. Therefore, the water content change of the planting areas before the n-th k planting area along the k-th target branch water supply pipeline is higher than the preset water content change value, which can solve the problem of slow water content change in the planting areas of the k-th target branch water supply pipeline. When adjustment condition C1 or C2 is satisfied, the flow rate of the k-th target branch water supply pipeline will increase. Therefore, F 2,k +ΔF 2,k =F 2,k,A .

[0071] According to an embodiment of the present invention, when adjustment condition C3 or C4 is satisfied, the flow rate of the k-th target branch water supply pipeline will decrease. Therefore, F 2,k -ΔF 2,k =F 2,k,A . When condition C3 is satisfied, in formula (4), represents the water content change of the (j max +1)-th planting area along the adjusted k-th target branch water supply pipeline, represents making the water content of the (j max +1)-th planting area along the k-th target branch water supply pipeline reach the preset water content in the current cycle, while represents making the water content of the (j max +2)-th planting area along the k-th target branch water supply pipeline lower than the preset water content in the current cycle, that is, only making the water content of the (j max +1)-th planting area reach the preset water content in the next cycle, and the subsequent planting areas will reach the preset water content in subsequent cycles one after another, enabling the drip irrigation of the planting areas to be carried out step by step. On the premise of completing the drip irrigation work, the second flow rate data of the target branch water supply pipeline is reduced, and the problem that the excessive water flow rate of the branch water supply pipeline is likely to cause water resource waste is solved.

[0072] According to an embodiment of the present invention, when condition C4 is satisfied, in formula (4), can represent the water content change of the n-th k planting area along the k-th target branch water supply pipeline in the next monitoring cycle (that is, the water content change of the planting area with the smallest water content change speed along the k-th target branch water supply pipeline in the next monitoring cycle), represents the gap between the moisture content of the planting area at the end of the current monitoring period and the preset moisture content, can represent that in the N min -1 cycles (since the current monitoring period has passed, so there are still N min -1 cycles left until the minimum monitoring period number), in the case of reaching the preset moisture content, the moisture content that needs to change in each cycle, and represents that the change amount of the moisture content of the nth k planting area along the kth target branch water supply pipeline in a single cycle is less than or equal to the moisture content that needs to change in each cycle when the moisture content of the planting area reaches the preset moisture content in N min -1 cycles, that is, the number of cycles required for the moisture content of the planting area to reach the preset moisture content is greater than the minimum monitoring period number, so as to control the change speed of the moisture content of each planting area of the target branch water supply pipeline, increase the rationality of water resource utilization, and avoid water resource waste caused by excessive water flow.

[0073] According to an embodiment of the present invention, in formula (5), can represent that when adjusting the second flow data of the target branch water supply pipeline, the adjustment amount cannot be too large, so as to avoid the problems of too large or too small water flow in the target branch water supply pipeline, and at the same time avoid excessive pressure on the valve. In formula (6), F 2,k +ΔF 2,k ≤F 2,max can represent that the adjusted second flow data is less than the upper limit of the second flow data. In formula (7), F 2,k -ΔF 2,k ≥0 can represent that the adjusted second flow data is greater than the lower limit of the second flow data (that is, 0).

[0074] In this way, according to the adjustment conditions satisfied by the target branch water supply pipeline, constraint conditions can be set specifically, so as to reasonably set the flow of the target branch water supply pipeline, avoid water resource waste caused by too large flow of the target branch water supply pipeline, and also avoid too small flow of the target branch water supply pipeline, resulting in low irrigation efficiency, so that the water supply pipeline can improve the efficiency of garden drip irrigation work on the premise of saving water resources.

[0075] According to an embodiment of the present invention, determining the objective function of the optimization model according to the second flow data of the target branch water supply pipeline includes: determining the objective function of the optimization model according to formula (8),

[0076]

[0077] Where M is the number of target branch water supply pipelines, and min is the minimization function.

[0078] According to an embodiment of the present invention, F 2,k,A is the adjusted second flow rate data, and the objective function is to minimize the sum of the adjusted multiple second flow rate data, so as to improve the utilization rate of water resources while ensuring the efficiency of garden drip irrigation, and save water resources.

[0079] According to an embodiment of the present invention, in step S105, according to the adjusted second flow rate data, determine the adjusted first flow rate data of the main water supply pipeline; after adjusting the second flow rate data of the target branch water supply pipeline, sum up the second flow rate data of each branch water supply pipeline to determine the adjusted first flow rate data of the main water supply pipeline.

[0080] According to an embodiment of the present invention, in step S106, according to the adjusted second flow rate data of the target branch water supply pipeline and the second flow rate data, determine the adjustment parameter of the valve of the target branch water supply pipeline.

[0081] According to an embodiment of the present invention, in step S107, according to the adjusted first flow rate data and the first flow rate data, determine the adjustment parameter of the valve of the main water supply pipeline.

[0082] According to an embodiment of the present invention, in step S108, at the beginning of the next monitoring period, according to the adjustment parameters of the valves of the target branch water supply pipeline and the adjustment parameters of the valves of the main water supply pipeline, adjust the valves of the target branch water supply pipeline and the valves of the main water supply pipeline respectively.

[0083] According to an embodiment of the present invention, determine the adjustment parameters of the valves of the target water supply pipeline according to the two aspects of the second flow rate data before and after adjustment, and determine the adjustment parameters of the valves of the main water supply pipeline according to the two aspects of the first flow rate data before and after adjustment, and then adjust the valves of the target branch water supply pipeline and the main water supply pipeline respectively, which increases the utilization efficiency of water resources and improves the efficiency of drip irrigation work.

[0084] According to the garden drip irrigation water-saving control method of the embodiment of the present invention, the first flow data of the main water supply pipeline in the current monitoring period and the second flow data of each branch water supply pipeline can be obtained. At the start and end times of the current monitoring period, the moisture content data and position information of multiple planting areas are obtained, and then according to the fitting relationship between the moisture content data and the position information of the multiple planting areas, it is determined whether the second flow data of each branch water supply pipeline needs to be adjusted, and the adjusted second flow data and first flow data are determined. Then, at the beginning of the next monitoring period, the valves of the target branch water supply pipeline and the valves of the main water supply pipeline are adjusted. During the adjustment process, the changes in the water flow in the water supply pipeline are fully considered, so that the work of garden drip irrigation is more intelligent and precise, the utilization rate of water resources is improved, and the probability of insufficient irrigation is reduced. When determining the moisture content function of the planting area, the moisture change in the planting area during the current monitoring period can be determined based on the first moisture content function at the start time of the current monitoring period and the second moisture content function at the end time, thereby obtaining a moisture content function of the planting area that can accurately express the relationship between the moisture change in the planting area and the serial number and water flow of the planting area, so that the moisture content function of the planting area can accurately express the positive correlation between the moisture change in the planting area and the second flow data, and the negative correlation between the moisture change in the planting area and the serial number, providing an accurate data basis for saving water resources in the garden and improving drip irrigation efficiency. When setting the adjustment conditions, four conditions can be set based on various factors such as the moisture content and moisture change in the planting area along the branch water supply pipeline and the water flow of the branch water supply pipeline, so as to accurately determine whether the second flow data of the branch water supply pipeline needs to be adjusted, thereby providing a data basis for the regulation of water resources, and comprehensively considering various factors to make the regulation of water resources more accurate and objective. When setting the constraints of the optimization model, the constraints can be set in a targeted manner according to the adjustment conditions satisfied by the target branch water supply pipeline, so as to reasonably set the flow of the target branch water supply pipeline, avoid excessive flow of the target branch water supply pipeline, resulting in water resource waste, and avoid too small flow of the target branch water supply pipeline, resulting in low irrigation efficiency, so that the water supply pipeline can improve the efficiency of garden drip irrigation while saving water resources. When setting the objective function of the optimization model, the sum of multiple adjusted second flow data can be minimized, so as to improve the utilization rate of water resources while ensuring the efficiency of garden drip irrigation, so as to save water resources.

[0085] Figure 2 A schematic diagram of a garden drip irrigation water-saving control system according to an embodiment of the present invention is exemplarily shown, and the system includes:

[0086] A first data acquisition module is used to acquire first flow data of the main water supply pipeline in the current monitoring period and second flow data of each branch water supply pipeline;

[0087] The second data acquisition module acquires moisture content data at multiple positions in the planting areas where plants are planted along the branch water supply pipeline at the start and end times of the current monitoring period. One drip outlet of the branch water supply pipeline performs drip irrigation for one planting area, the planting area is a cubic area, and the drip outlet is directly above the centroid of the cubic area;

[0088] The data adjustment determination module determines whether the second flow rate data of each branch water supply pipeline needs to be adjusted according to the moisture content data and the serial numbers of each planting area, where the serial numbers of the planting areas increase sequentially in the water flow direction in the branch water supply pipeline;

[0089] The first data determination module, if there is a target branch water supply pipeline whose second flow rate data needs to be adjusted, determines the adjusted second flow rate data of the target branch water supply pipeline in the next monitoring period according to the moisture content data;

[0090] The second data determination module determines the adjusted first flow rate data of the main water supply pipeline according to the adjusted second flow rate data;

[0091] The first parameter determination module determines the adjustment parameter of the valve of the target branch water supply pipeline according to the adjusted second flow rate data of the target branch water supply pipeline and the second flow rate data;

[0092] The second parameter determination module determines the adjustment parameter of the valve of the main water supply pipeline according to the adjusted first flow rate data and the first flow rate data;

[0093] The valve adjustment module adjusts the valves of the target branch water supply pipeline and the main water supply pipeline respectively according to the adjustment parameters of the valves of the target branch water supply pipeline and the adjustment parameters of the valves of the main water supply pipeline at the start of the next monitoring period.

[0094] The present invention can be a method, device, system, and / or computer program product. The computer program product can include a computer-readable storage medium having computer-readable program instructions for performing various aspects of the present invention loaded thereon.

[0095] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and described in the embodiments, and the embodiments of the present invention can have any deformation or modification without departing from the principle.

Claims

1. A garden drip irrigation water-saving control method, characterized in that, Including: Obtaining first flow rate data of the main water supply pipeline and second flow rate data of each branch water supply pipeline in the current monitoring period; At the start and end times of the current monitoring period, obtaining water content data at multiple positions in the planting areas where the plants are planted along the branch water supply pipelines. One drip outlet of the branch water supply pipeline conducts drip irrigation for one planting area, the planting area is a cubic region, and the drip outlet is directly above the centroid of the cubic region; According to the water content data and the serial numbers of each planting area, determining whether the second flow rate data of each branch water supply pipeline needs to be adjusted, including: According to the water content data, the serial number of the planting area, and the second flow rate data, determining the water content function of the planting area, specifically including: fitting the water content data at multiple positions in the planting area at the start time of the current monitoring period with the position information in the planting area to obtain the first water content function of each planting area at the start time of the current monitoring period; fitting the water content data at multiple positions in the planting area at the end time of the current monitoring period with the position information in the planting area to obtain the second water content function of each planting area at the end time of the current monitoring period; according to the first water content function, the second water content function, the serial number of the planting area, and the second flow rate data, determining the water content function of the planting area, specifically as: according to the formula Determine the undetermined coefficient equation of the water content function of the planting area, where f i,j,2 (x, y, z) is the second water content function of the j-th planting area along the i-th branch water supply pipeline, f i,j,1 (x, y, z) is the first water content function of the j-th planting area along the i-th branch water supply pipeline, V i,j is the range of the j-th planting area along the i-th branch water supply pipeline, (x, y, z) is the position coordinate in V i,j F 2,i is the second flow rate data of the i-th branch water supply pipeline, α1, α2, α3, α4, and α5 are undetermined coefficients; solve the undetermined coefficients according to the first water content function, the second water content function and the serial number of each planting area, and the second flow rate data of each branch water supply pipeline to obtain the solution values of the undetermined coefficients; determine the water content function of the planting area according to the solution values of the undetermined coefficients and the undetermined coefficient equation of the water content function of the planting area; According to the water content function of the planting area and the water content data, determining the adjustment condition of the second flow rate data, specifically including: according to the formula Determine the adjustment conditions C1, C2, C3, and C4 for the second flow rate data, where W p is the preset moisture content, n i is the number of planting areas along the i-th branch water supply pipeline, K p is the preset multiple, P p,1 is the first preset ratio, ΔW p is the preset moisture content change value, P p,2 is the second preset ratio, N min is the minimum number of cycles, if is a conditional function, α 1,A is the solution value of α1, α 2,A is the solution value of α2, α 3,A is the solution value of α3, α 4,A is the solution value of α4, α 5,A is the solution value of α5; determine whether the second flow rate data of the i-th branch water supply pipeline needs to be adjusted when any one of the adjustment conditions C1, C2, C3, and C4 for the second flow rate data is satisfied; According to the adjustment condition of the second flow rate data, determining whether the second flow rate data of each branch water supply pipeline needs to be adjusted, where the serial numbers of the planting areas increase sequentially in the water flow direction in the branch water supply pipeline; If there is a target branch water supply pipeline whose second flow rate data needs to be adjusted, determining the adjusted second flow rate data of the target branch water supply pipeline in the next monitoring period according to the water content data; According to the adjusted second flow rate data, determining the adjusted first flow rate data of the main water supply pipeline; According to the adjusted second flow rate data of the target branch water supply pipeline and the second flow rate data, determining the adjustment parameter of the valve of the target branch water supply pipeline; According to the adjusted first flow rate data and the first flow rate data, determining the adjustment parameter of the valve of the main water supply pipeline; At the start of the next monitoring period, adjusting the valves of the target branch water supply pipeline and the main water supply pipeline respectively according to the adjustment parameter of the valve of the target branch water supply pipeline and the adjustment parameter of the valve of the main water supply pipeline.

2. The garden drip irrigation water-saving control method according to claim 1, characterized in that, If there is a target branch water supply pipeline whose second flow rate data needs to be adjusted, determining the adjusted second flow rate data of the target branch water supply pipeline in the next monitoring period according to the water content data, including: Determine the constraint conditions of the optimization model according to the second flow rate data of the target branch water supply pipeline, the second moisture content function, the water content function of the planting area, and the adjustment conditions of the second flow rate data satisfied by the target branch water supply pipeline; Determine the objective function of the optimization model according to the second flow rate data of the target branch water supply pipeline; Solve the optimization model according to the constraint conditions and the objective function of the optimization model to obtain the adjusted second flow rate data of the target branch water supply pipeline in the next monitoring period.

3. The garden drip irrigation water-saving control method according to claim 2, characterized in that, Determine the constraint conditions of the optimization model according to the second flow rate data of the target branch water supply pipeline, the second moisture content function, the water content function of the planting area, and the adjustment conditions of the second flow rate data satisfied by the target branch water supply pipeline, including: According to the formula F 2,k +ΔF 2,k ≤F 2,max F 2,k -ΔF 2,k ≥0 Determine the constraint conditions of the optimization model, where F 2,k is the second flow rate data of the water supply pipeline of the k-th target branch, ΔF 2,k is the adjustment amount of the second flow rate data of the water supply pipeline of the k-th target branch, n k is the number of planting areas along the water supply pipeline of the k-th branch, is the second moisture content function of the n k (1 - P p,1 ) planting areas along the water supply pipeline of the k-th target branch, is the range of the n k (1 - P p,1 ) planting areas along the water supply pipeline of the k-th target branch, j max is the maximum value of the serial numbers of the planting areas that meet among the multiple planting areas of the water supply pipeline of the k-th target branch, is the second moisture content function of the (j max +1)-th planting area along the water supply pipeline of the k-th target branch, is the range of the (j max +1)-th planting area along the water supply pipeline of the k-th target branch, is the second moisture content function of the (j max +2)-th planting area along the water supply pipeline of the k-th target branch, is the range of the (j max +2)-th planting area along the water supply pipeline of the k-th target branch, is the second moisture content function of the n k -th planting area along the water supply pipeline of the k-th target branch, is the range of the n k -th planting area along the water supply pipeline of the k-th target branch, β is a preset proportional threshold, F 2,k,A is the adjusted second flow rate data, F 2,max is the maximum value of the second flow rate data.

4. The garden drip irrigation water-saving control method according to claim 3, characterized in that, Determine the objective function of the optimization model according to the second flow rate data of the target branch water supply pipeline, including: According to the formula Determine the objective function of the optimization model, where M is the number of target branch water supply pipelines and min is the minimization function.

5. A garden drip irrigation water-saving control system for implementing the method according to any one of claims 1-4, characterized in that, Including: The first data acquisition module acquires the first flow rate data of the main water supply pipeline in the current monitoring period and the second flow rate data of each branch water supply pipeline; The second data acquisition module acquires the moisture content data at multiple positions in the planting area where the plants are planted along the branch water supply pipeline at the start and end times of the current monitoring period. One drip outlet of the branch water supply pipeline conducts drip irrigation for one planting area, the planting area is a cubic area, and the drip outlet is directly above the centroid of the cubic area; The data adjustment determination module determines whether the second flow rate data of each branch water supply pipeline needs to be adjusted according to the moisture content data and the serial numbers of each planting area, where the serial numbers of the planting areas increase sequentially in the water flow direction in the branch water supply pipeline; The first data determination module, if there is a target branch water supply pipeline that needs to adjust the second flow rate data, determines the adjusted second flow rate data of the target branch water supply pipeline in the next monitoring period according to the moisture content data; The second data determination module determines the adjusted first flow rate data of the main water supply pipeline according to the adjusted second flow rate data; The first parameter determination module determines the adjustment parameter of the valve of the target branch water supply pipeline according to the adjusted second flow rate data of the target branch water supply pipeline and the second flow rate data; The second parameter determination module determines the adjustment parameter of the valve of the main water supply pipeline according to the adjusted first flow rate data and the first flow rate data; The valve adjustment module adjusts the valves of the target branch water supply pipeline and the main water supply pipeline respectively according to the adjustment parameters of the valve of the target branch water supply pipeline and the adjustment parameters of the valve of the main water supply pipeline at the beginning of the next monitoring period.

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