Garden drip irrigation water-saving control method and system

Abstract

The invention provides a garden drip irrigation water-saving control method and system, and relates to the technical field of garden drip irrigation. The method comprises the following steps: acquiring first flow data of a main water supply pipeline and second flow data of each branch water supply pipeline, and acquiring moisture content data and position information of a plurality of planting areas at the starting moment and the ending moment of a current monitoring period, determining whether the second flow data of each branch water supply pipeline needs to be adjusted or not according to the moisture content data and the position information of the plurality of planting areas, determining the adjusted second flow data and first flow data, and adjusting valves of the target branch water supply pipeline and the main water supply pipeline at the beginning of the next monitoring period. According to the method, the water content, the water change amount and the water flow of the water supply pipeline in the planting area are comprehensively considered, so that the water flow of the water supply pipeline in the next period is adjusted, and the utilization rate of water resources is increased while the garden drip irrigation efficiency is guaranteed.

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 temperature parameters, humidity parameters, water demand parameters and irrigation quota parameters of the object to be drip irrigated, calculating the drip irrigation control probability value according to the drip irrigation control prediction function generated by pre-training and the temperature parameters, humidity parameters, water demand parameters and irrigation quota parameters of the object to be drip irrigated, and when it is judged that the drip irrigation control probability value is greater than or equal to a preset threshold, starting the drip irrigation corresponding to the object to be drip irrigated.

[0003] CN117502197A discloses a pressure-constant control device for a drip irrigation pipe network system for farmland irrigation, comprising a water hose, an outlet valve installed at the end thereof, the outlet valve being used to control water supply to the inside of the water hose and being installed on the outlet valve, and a pressure gauge for measuring the water flow pressure and flow rate in the water hose being installed at the front end of the water hose close to the outlet valve and the end far from the outlet valve. In this scheme, a booster pipe is arranged on the water hose, and the water flow inside the water hose drives the swing blade inside the booster pipe, so that the swing blade rotates about the connecting shaft, and when multiple groups of swing blades rotate, a stable water flow can be generated in the booster pipe and the water hose, and the pressure at one end of the water hose close to the outlet valve and one end far from the outlet valve is kept consistent, which can make irrigation uniform and help farmers increase production and income.

[0004] Therefore, in the relevant technology, the working efficiency of garden drip irrigation is getting higher and higher, and water can be automatically supplied to various planting areas through the water supply pipeline. However, in the work of garden drip irrigation, the change of water flow in the water supply pipeline is not considered, resulting in inaccurate control of the water volume of drip irrigation, which in turn causes problems such as waste of water resources or insufficient irrigation.

[0005] The information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0006] The embodiment of the present invention provides a garden drip irrigation water-saving control method and system, which can solve the technical problem that it is difficult to accurately drip irrigate the amount of water, thereby causing waste of water resources or insufficient irrigation.

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

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

[0009] At the start and end of the current monitoring cycle, the moisture content data at multiple locations in the planting area where the plants planted along the branch water supply pipeline are located are obtained, wherein a drip outlet of the branch water supply pipeline is used for drip irrigation of a planting area, the planting area is a cubic area, and the drip outlet is located directly above the centroid of the cubic area;

[0010] Determine whether the second flow data of each branch water supply pipeline needs to be adjusted according to the moisture content data and the sequence number of each planting area, wherein the sequence number of the planting area increases in sequence according to the water flow direction in the branch water supply pipeline;

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

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

[0013] Determining adjustment parameters of a valve of the target branch water supply pipeline according to the adjusted second flow data of the target branch water supply pipeline and the second flow data;

[0014] determining a regulating parameter of a valve of the main water supply pipeline according to the regulated first flow data and the first flow data;

[0015] At the beginning of the next monitoring cycle, the valves of the target branch water supply pipeline and the valves of the main water supply pipeline are adjusted 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.

[0016] According to a second aspect of an embodiment of the present invention, there is provided a garden drip irrigation water-saving control system, comprising:

[0017] 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;

[0018] The second data acquisition module acquires the moisture content data at multiple positions in the planting area where the plants planted along the branch water supply pipeline are located at the start time and the end time of the current monitoring cycle, wherein a drip outlet of the branch water supply pipeline performs drip irrigation for a planting area, the planting area is a cubic area, and the drip outlet is located directly above the centroid of the cubic area;

[0019] a data adjustment determination module, which determines whether the second flow data of each branch water supply pipeline needs to be adjusted according to the moisture content data and the sequence number of each planting area, wherein the sequence number of the planting area increases in sequence according to the water flow direction in the branch water supply pipeline;

[0020] a first data determination module, which determines the adjusted second flow data of the target branch water supply pipeline in the next monitoring cycle according to the moisture content data if there is a target branch water supply pipeline that needs to adjust the second flow data;

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

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

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

[0024] The valve regulating module regulates the valve of the target branch water supply pipeline and the valve of the main water supply pipeline respectively according to the regulating parameters of the valve of the target branch water supply pipeline and the regulating parameters of the valve of the main water supply pipeline at the beginning of the next monitoring cycle.

[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] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other embodiments can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of a flow chart of a garden drip irrigation water-saving control method according to an embodiment of the present invention is exemplarily shown;

[0029] Figure 2 A diagram of a garden drip irrigation water-saving control system according to an embodiment of the present invention is exemplarily shown. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0032] Figure 1 The flowchart of the garden drip irrigation water-saving control method according to an embodiment of the present invention is exemplarily shown, and the system includes:

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

[0034] Step S102, at the start time and the end time of the current monitoring cycle, obtaining moisture content data at multiple locations in the planting area where the plants planted along the branch water supply pipeline are located, wherein a drip outlet of the branch water supply pipeline performs drip irrigation for a planting area, the planting area is a cubic area, and the drip outlet is located directly above the centroid of the cubic area;

[0035] Step S103, determining whether the second flow data of each branch water supply pipeline needs to be adjusted according to the moisture content data and the sequence number of each planting area, wherein the sequence number of the planting area increases in sequence according to 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 data, determine the adjusted second flow data of the target branch water supply pipeline in the next monitoring cycle according to the moisture content data;

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

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

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

[0040] Step S108, at the beginning of the next monitoring cycle, the valves of the target branch water supply pipeline and the valves of the main water supply pipeline are adjusted 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.

[0041] According to the garden drip irrigation water-saving control method 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.

[0042] According to an embodiment of the present invention, in step S101, 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 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 performed on the planting area through each branch water supply pipeline, wherein the first flow data of the main water supply pipeline is equal to the sum of the second flow data of each branch water supply pipeline.

[0043] According to an embodiment of the present invention, in step S102, at the start time and the end time of the current monitoring cycle, the moisture content data at multiple positions in the planting area where the plants planted along the branch water supply pipeline are located are obtained, wherein a drip outlet of the branch water supply pipeline performs drip irrigation for a planting area, the planting area is a cubic area, and the drip outlet is located 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 the planting area, so as to determine the moisture content data at any position in the planting area.

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

[0045] According to an embodiment of the present invention, the serial numbers of the planting areas increase in sequence according to the direction of water flow in the branch water supply pipeline, that is, a larger serial number can indicate that the planting area is located at the rear end along the branch water supply pipeline. Since part of the water flow has already flowed out of the previous drip outlet, the water flow rate at the drip outlet of the planting area is smaller. Based on the moisture content data at multiple positions, the serial number of the planting area and the second flow data, an equation with unknown coefficients can be constructed and solved to determine the moisture content function of the planting area, and based on the four adjustment conditions, determine whether the second flow data of each pipeline needs to be adjusted.

[0046] According to an embodiment of the present invention, the moisture content function of the planting area is determined based on the moisture content data, the serial number of the planting area, and the second flow data, including: fitting the moisture content data of multiple positions in the planting area at the start time of the current monitoring cycle with the position information in the planting area, and obtaining the first moisture content function of each planting area at the start time of the current monitoring cycle; fitting the moisture content data of multiple positions in the planting area at the end time of the current monitoring cycle with the position information in the planting area, and obtaining the second moisture content function of each planting area at the end time of the current monitoring cycle; determining the moisture content function of the planting area based on the first moisture content function, the second moisture content function, the serial number of the planting area and the second flow data.

[0047] According to an embodiment of the present invention, as described above, a fitting equation can be constructed in combination with the fitting relationship between the location information of multiple locations in the planting area where the plant is located and the moisture content data in the planting area to express the relationship between the moisture content data and the position in the planting area. Therefore, a first moisture content function can be obtained by fitting based on the moisture content of multiple locations in the planting area at the beginning of the current monitoring cycle and the position within the planting area, and a second moisture content function can be obtained by fitting based on the moisture content of multiple locations in the planting area at the end of the current monitoring cycle and the position within the planting area.

[0048] According to an embodiment of the present invention, determining the moisture content function of the planting area according to the first moisture content function, the second moisture content function, the sequence number of the planting area and the second flow data includes: determining the undetermined coefficient equation of the moisture content function of the planting area according to formula (1),

[0049]

[0050] Among them, f i,j,2 (x, y, z) is the second moisture content function of the jth planting area along the i-th branch water supply pipeline, f i,j,1 (x, y, z) is the first moisture content function of the jth planting area along the i-th branch water supply pipeline, V i,j is the range of the jth planting area along the i-th branch water supply pipeline, (x, y, z) is V i,j The position coordinates in F 2,i is the second flow data of the i-th branch water supply pipeline, α1, α2, α3, α4 and α5 are unknown coefficients; according to the first moisture content function, the second moisture content function and the serial number of each planting area, and the second flow data of each branch water supply pipeline, the unknown coefficients are solved to obtain the solved values ​​of the unknown coefficients; according to the solved values ​​of the unknown coefficients and the unknown coefficient equation of the moisture content function of the planting area, the moisture content function of the planting area is determined.

[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 jth planting area along the ith branch water supply pipeline in the current monitoring period. By integrating this calculation formula, the moisture change in the jth planting area along the ith branch water supply pipeline in the current monitoring period can be obtained. The moisture change in the jth planting area along the ith branch water supply pipeline should be positively correlated with the second flow data of the ith branch water supply pipeline (i.e., the water flow of the ith branch water supply pipeline). The larger the second flow data of the ith branch water supply pipeline, the faster the moisture content in the jth planting area along the ith branch water supply pipeline changes, and the The change in moisture content is negatively correlated with the serial number of the jth planting area along the i-th branch water supply pipeline. The larger j is, the more the planting area is at the rear end along the i-th branch water supply pipeline. The larger the serial number of the jth planting area along the i-th branch water supply pipeline, and the smaller the water flow rate allocated to the jth planting area, the slower the change in moisture content in the jth planting area along the i-th branch water supply pipeline. The equation of undetermined coefficients is constructed through the above positive correlation and negative correlation relationship, and the undetermined coefficients α1, α2, α3, α4, and α5 are established to optimize the accuracy of the relationship between the moisture content in the jth planting area along the i-th branch water supply pipeline and the second flow data of the i-th branch water supply pipeline and the serial number of the planting area. The equation of undetermined coefficients is solved by the first moisture content function, the second moisture content function, the serial number, and the second flow data of each planting area to obtain the solution value of the undetermined coefficient, and then determine the moisture content function of the planting area.

[0052] In this way, the moisture change in the planting area during the current monitoring cycle can be determined based on the first moisture content function at the start time of the current monitoring cycle and the second moisture content function at the end time, and then a planting area moisture content function that can accurately express the relationship between the moisture change in the planting area and the serial number and water flow rate of the planting area can be obtained. The planting area moisture content function can accurately express the positive correlation between the moisture change in the planting area and the second flow data, as well as 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 gardens and improving drip irrigation efficiency.

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

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

[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 water content change value, P p,2 is the second preset ratio, N min is the minimum number of cycles, if is the 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 of the second flow data is met, 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), W p -∫∫∫ Vi,j [f i,j,2 (x,y,z)]dxdydz represents the difference between the moisture content of the jth 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 water content change value of the jth planting area along the i-th branch water supply pipeline in one cycle, so, Indicates that the moisture content of the jth planting area along the i-th branch water supply pipeline passes through K p The preset moisture content cannot be reached after 1 cycle, and then the moisture content in the planting area along the i-th branch water supply pipeline is calculated by the summation formula and conditional function. p The number of planting areas that still cannot reach the preset moisture content after 1 cycle, that is, if If the condition is met, the conditional function value is 1, otherwise it is 0. After summing, the number of planting areas that meet the condition in the planting area along the i-th branch water supply pipeline can be obtained. Therefore, It can be expressed as follows: in the planting area along the i-th branch water supply pipeline, through K p The proportional relationship between the number of planting areas that still cannot reach the preset moisture content in the first cycle 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 ∫∫∫ Vi,j f i,j,2 (x,y,z)dxdydz≥Wp It means that the moisture content of the jth planting area along the i-th branch water supply pipeline has reached the preset moisture content at the end of the current monitoring cycle. Therefore, It can indicate that the proportion of the planting area along the i-th branch water supply pipeline that reaches 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 that reaches the preset moisture content does not reach the second preset proportion, and after K p The proportion of planting areas that still cannot reach the preset moisture content after a cycle is low, and 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 in moisture content in the jth planting area along the i-th branch water supply pipeline in the current monitoring period. Therefore, It means that the change of moisture content in the jth planting area along the i-th branch water supply pipeline in the current monitoring period is too small. It indicates that the summation formula and conditional function are used to calculate whether there is a planting area with too little moisture content change along the i-th branch water supply pipeline. When the formula is not equal to 0, it means that the moisture content change in at least one planting area along the i-th branch water supply pipeline is too small, and the water supply of the target branch water supply pipeline needs to be adjusted. The meaning is the same as above and will not be repeated here. When the above two conditions are met, it means that the proportion of planting areas along the i-th branch water supply pipeline that reach the preset moisture content has not reached the second preset proportion, and there are planting areas where the moisture content changes too little. Therefore, the water supply of the branch water supply pipeline is insufficient and the water supply of the branch water supply pipeline needs to be increased.

[0059] According to an embodiment of the present invention, in the adjustment condition C3 of formula (2), It can be said that the proportion of planting areas along the i-th branch water supply pipeline that have reached 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, making 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 minIn order to make the moisture content of the planting area reach the preset moisture content, the minimum number of cycles required. If the number of cycles required for the moisture content of a certain planting area to reach the preset moisture content is less than the minimum number of cycles, it indicates that the water flow of the branch water supply pipeline where the planting area is located is too large, which is easy to cause a waste of water resources. It can be expressed as the increase in moisture content in each cycle when the preset moisture content is reached within the minimum number of cycles, or it can be expressed as the fastest change rate of moisture content in the jth planting area along the i-th branch water supply pipeline. It can be said that in the current monitoring period, the change in moisture content in the jth planting area along the i-th branch water supply pipeline is greater than the moisture change corresponding to the fastest change rate mentioned above, then This means that there is at least one planting area along the i-th branch water supply pipeline where the moisture content changes too quickly, which can easily cause a waste of water resources. In this case, it is necessary to reduce the water supply of the 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 moisture content and moisture change in the planting area along the branch water supply pipeline and the water flow rate of the branch water supply pipeline, so as to accurately determine whether it is necessary to adjust the second flow data of the branch water supply pipeline, thereby providing a data basis for the regulation of water resources. Comprehensive consideration of various factors makes the regulation of water resources more accurate and objective.

[0062] According to an embodiment of the present invention, in step S104, based on the moisture content data, if there is a target branch water supply pipeline that needs to adjust the second flow data, the adjusted second flow data of the target branch water supply pipeline in the next monitoring cycle is determined based on the moisture content data, including: determining the constraints of the optimization model based on the second flow data of the target branch water supply pipeline, the second moisture content function, the moisture content function of the planting area, and the adjustment condition of the second flow data satisfied by the target branch water supply pipeline; determining the objective function of the optimization model based on the second flow data of the target branch water supply pipeline; solving the optimization model based on the constraints and objective function of the optimization model to obtain the adjusted second flow 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 data, the constraints of the optimization model are determined according to the second flow data of the target branch water supply pipeline, the second moisture content function, the moisture content function of the planting area, and the adjustment condition of the second flow data satisfied by the target branch water supply pipeline, and then the objective function of the optimization model is determined, that is, the best solution for adjusting the water flow of the target branch water supply pipeline, and then the optimization model is solved to obtain the optimal solution for the second flow data of the target branch water supply pipeline, that is, the second flow data of the target branch water supply pipeline after adjustment in the next monitoring period, wherein the optimization model may be a nonlinear programming model or a genetic algorithm model, and the present invention is not limited here.

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

[0065]

[0066]

[0067] F 2,k +ΔF 2,k ≤F 2,max (6)

[0068] F 2,k -ΔF 2,k ≥0(7)

[0069] Among them, F 2,k is the second flow data of the kth target branch water supply pipeline, ΔF 2,k is the adjustment amount of the second flow data of the kth target branch water supply pipeline, n k is the number of planting areas along the k-th branch water supply pipeline, is the nth target branch water supply pipeline along the kth target branch water supply pipeline. k (1-P p,1 ) planting area’s second moisture content function, is the nth target branch water supply pipeline along the kth target branch water supply pipeline. k (1-P p,1 ) planting areas, j max For multiple planting areas of the k-th target branch water supply pipeline, The maximum value of the serial number of the planting area, is the jth point along the kth target branch water supply pipeline max+1 Second moisture content function of the planting area, is the jth point along the kth target branch water supply pipeline max +1 planting area range, is the jth point along the kth target branch water supply pipeline max +2 Second moisture content function for the planting area, is the jth point along the kth target branch water supply pipeline max +2 planting area range, is the nth target branch water supply pipeline along the kth target branch water supply pipeline. k The second moisture content function of the planting area, is the nth target branch water supply pipeline along the kth target branch water supply pipeline. k The range of planting areas, β is the preset ratio threshold F 2,k,A is the second flow data after adjustment, F 2,max is the maximum value of the second flow data.

[0070] According to an embodiment of the present invention, in formula (3), (F 2,k +ΔF 2,k ) represents the second flow data of the kth target branch water supply pipeline after adjustment, n k (1-P p,1 ) represents the number of planting areas along the preset k-th target branch water supply pipeline that meet the preset moisture content. For example, the first preset ratio P p,1 is 60%, the number of planting areas along the kth branch water supply pipeline is n k is 10. When condition C1 is met, the moisture content passes K p The number of planting areas that still cannot reach the preset moisture content after 6 cycles exceeds 6. Therefore, when setting the constraint conditions, the fourth planting area can be set to be able to reach the preset moisture content at K when using the adjusted water flow. p After the preset moisture content is reached after a cycle, it can be p After a cycle, the number of planting areas that reach the preset moisture content will be greater than or equal to 4, making the water supply of the branch water supply pipeline basically sufficient. represents the nth branch water supply pipeline along the kth branch water supply pipeline k (1-P p,1 ) planting area after adjustment, and Indicates the nth k (1-P p,1 ) planting areas at the end of the current monitoring period, Indicates that after adjusting the second flow data, the nth k (1-Pp,1 ) planting areas in K p After cycles, the moisture content reaches the preset moisture content. Since the water flow rate of the drip outlet received by the planting area at the rear end of the k-th branch water supply pipeline is less than the water flow rate of the drip outlet received by the planting area at the front end of the k-th branch water supply pipeline, the water content of the n-th branch water supply pipeline along the k-th branch water supply pipeline is less than the water flow rate of the drip outlet received by the planting area at the front end of the k-th branch water supply pipeline. k (1-P p,1 ) planting areas before the first planting area can also reach the preset moisture content, so as to solve the problem that the water flow 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.

[0071] According to an embodiment of the present invention, in formula (4), when condition C2 is satisfied, It means that after adjusting the second flow data of the kth target branch water supply pipeline, the nth target branch water supply pipeline of the kth target branch water supply pipeline k The moisture change in the nth planting area is higher than the preset moisture change, and the nth planting area k The planting area is the last planting area along the k-th target branch water supply pipeline. Therefore, the n-th planting area along the k-th target branch water supply pipeline k The change in moisture content in the planting area before the kth planting area is higher than the preset moisture content change value, which can solve the problem of slow change in moisture content in the planting area of ​​the kth target branch water supply pipeline. When the adjustment conditions C1 or C2 are met, the flow rate of the kth target branch water supply pipeline will increase, so F 2,k +ΔF 2,k =F 2,k,A .

[0072] According to an embodiment of the present invention, when the adjustment condition C3 or C4 is satisfied, the flow rate of the kth target branch water supply pipeline will decrease, so F 2,k -ΔF 2,k =F 2,k,A When condition C3 is satisfied, in formula (4), represents the (j)th target branch water supply pipeline after adjustment. max +1) The change in moisture content in the planting area, Indicates that the (j)th target branch water supply pipeline along the kth target branch water supply pipeline in the current cycle max +1) The moisture content of the planting area reaches the preset moisture content, and Indicates that the (j)th target branch water supply pipeline along the kth target branch water supply pipeline in the current cycle max +2) planting areas have a moisture content lower than the preset moisture content, that is, in the next cycle, only the (j)th planting areamax +1) The moisture content of the first planting area reaches the preset moisture content, and the subsequent planting areas gradually reach the preset moisture content in the subsequent cycles, so that the drip irrigation of the planting areas can be carried out step by step. Under the premise of completing the drip irrigation work, the second flow data of the target branch water supply pipeline is reduced, which solves the problem of excessive water flow in the branch water supply pipeline that easily causes water resource waste.

[0073] According to an embodiment of the present invention, when condition C4 is satisfied, in formula (4), It can represent the nth target branch water supply pipeline along the kth target branch water supply pipeline. k The change in moisture content of the k-th target branch water supply pipeline in the next monitoring cycle (i.e., the change in moisture content of the k-th target branch water supply pipeline in the next monitoring cycle), Indicates the difference between the moisture content of the planting area at the end of the current monitoring period and the preset moisture content. It can be said that the planting area is N min -1 cycle (Since the current monitoring cycle has passed, there are N cycles left to the minimum monitoring cycle. min -1 cycle) to reach the preset moisture content, the moisture content required to change in each cycle, and This means that the nth target branch water supply pipeline along the kth target branch water supply pipeline k The change in moisture content of a planting area in a single cycle is less than or equal to the change in moisture content of the planting area in N min -When the preset moisture content is reached within 1 cycle, the moisture content that needs to change in each cycle, 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 cycle 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.

[0074] According to an embodiment of the present invention, in formula (5), It can be said that when adjusting the second flow data of the target branch water supply pipeline, the adjustment amount cannot be too large to avoid the problem of too large or too small water flow in the target branch water supply pipeline and avoid excessive pressure on the valve. In formula (6), F 2,k +ΔF 2,k ≤F 2,max It can be said 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 may indicate that the adjusted second flow data is greater than the lower limit of the second flow data (ie, 0).

[0075] In this way, the constraint conditions 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 the waste of water resources caused by excessive flow of the target branch water supply pipeline, and avoid the low irrigation efficiency caused by too small flow of the target branch water supply pipeline. This allows the water supply pipeline to improve the efficiency of garden drip irrigation while saving water resources.

[0076] 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),

[0077]

[0078] Among them, M is the number of target branch water supply pipelines, and min is the minimization function.

[0079] According to an embodiment of the present invention, F 2,k,A The second flow data is adjusted, and the objective function is to minimize the sum of the plurality of adjusted second flow data, so as to improve the utilization rate of water resources while ensuring the efficiency of garden drip irrigation, so as to save water resources.

[0080] According to an embodiment of the present invention, in step S105, the adjusted first flow data of the main water supply pipeline is determined based on the adjusted second flow data; after adjusting the second flow data of the target branch water supply pipeline, the second flow data of each branch water supply pipeline are summed to determine the adjusted first flow data of the main water supply pipeline.

[0081] According to an embodiment of the present invention, in step S106, the adjustment parameters of the valve of the target branch water supply pipeline are determined according to the adjusted second flow data of the target branch water supply pipeline and the second flow data.

[0082] According to an embodiment of the present invention, in step S107, the adjustment parameters of the valve of the main water supply pipeline are determined according to the adjusted first flow data and the first flow data.

[0083] According to an embodiment of the present invention, in step S108, at the beginning of the next monitoring cycle, the valves of the target branch water supply pipeline and the valves of the main water supply pipeline are adjusted 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.

[0084] According to an embodiment of the present invention, the adjustment parameters of the valve of the target water supply pipeline are determined based on the two aspects of the second flow data before and after the adjustment, and the adjustment parameters of the valve of the main water supply pipeline are determined based on the two aspects of the first flow data before and after the adjustment, and then the valves of the target branch water supply pipeline and the valves of the main water supply pipeline are adjusted respectively, thereby increasing the utilization efficiency of water resources and improving the efficiency of drip irrigation.

[0085] 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.

[0086] 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:

[0087] 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;

[0088] The second data acquisition module acquires the moisture content data at multiple positions in the planting area where the plants planted along the branch water supply pipeline are located at the start time and the end time of the current monitoring cycle, wherein a drip outlet of the branch water supply pipeline performs drip irrigation for a planting area, the planting area is a cubic area, and the drip outlet is located directly above the centroid of the cubic area;

[0089] a data adjustment determination module, which determines whether the second flow data of each branch water supply pipeline needs to be adjusted according to the moisture content data and the sequence number of each planting area, wherein the sequence number of the planting area increases in sequence according to the water flow direction in the branch water supply pipeline;

[0090] a first data determination module, which determines the adjusted second flow data of the target branch water supply pipeline in the next monitoring cycle according to the moisture content data if there is a target branch water supply pipeline that needs to adjust the second flow data;

[0091] a second data determination module, which determines the adjusted first flow data of the main water supply pipeline according to the adjusted second flow data;

[0092] a first parameter determination module, which determines the adjustment parameter of the valve of the target branch water supply pipeline according to the adjusted second flow data of the target branch water supply pipeline and the second flow data;

[0093] a second parameter determination module, which determines the adjustment parameter of the valve of the main water supply pipeline according to the adjusted first flow data and the first flow data;

[0094] The valve regulating module regulates the valve of the target branch water supply pipeline and the valve of the main water supply pipeline respectively according to the regulating parameters of the valve of the target branch water supply pipeline and the regulating parameters of the valve of the main water supply pipeline at the beginning of the next monitoring cycle.

[0095] The present invention may be a method, an apparatus, a system and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for executing various aspects of the present invention.

[0096] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A garden drip irrigation water-saving control method, characterized in that: include: Obtaining first flow data of the main water supply pipeline in the current monitoring period and second flow data of each branch water supply pipeline; At the start and end of the current monitoring cycle, the moisture content data at multiple locations in the planting area where the plants planted along the branch water supply pipeline are located are obtained, wherein a drip outlet of the branch water supply pipeline is used for drip irrigation of a planting area, the planting area is a cubic area, and the drip outlet is located directly above the centroid of the cubic area; Determine whether the second flow data of each branch water supply pipeline needs to be adjusted according to the moisture content data and the sequence number of each planting area, wherein the sequence number of the planting area increases in sequence according to the water flow direction in the branch water supply pipeline; If there is a target branch water supply pipeline that needs to adjust the second flow data, determine the adjusted second flow data of the target branch water supply pipeline in the next monitoring cycle according to the moisture content data; Determining the adjusted first flow data of the main water supply pipeline according to the adjusted second flow data; Determining adjustment parameters of a valve of the target branch water supply pipeline according to the adjusted second flow data of the target branch water supply pipeline and the second flow data; determining a regulating parameter of a valve of the main water supply pipeline according to the regulated first flow data and the first flow data; At the beginning of the next monitoring cycle, the valves of the target branch water supply pipeline and the valves of the main water supply pipeline are adjusted 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.

2. The garden drip irrigation water-saving control method according to claim 1, characterized in that: According to the moisture content data and the sequence number of each planting area, determining whether the second flow data of each branch water supply pipeline needs to be adjusted includes: Determine a moisture content function of the planting area according to the moisture content data, the serial number of the planting area, and the second flow data; Determining a regulating condition for the second flow data according to the planting area moisture content function and the moisture content data; According to the adjustment condition of the second flow data, it is determined whether the second flow data of each branch water supply pipeline needs to be adjusted.

3. The garden drip irrigation water-saving control method according to claim 2, characterized in that: Determining a moisture content function of the planting area according to the moisture content data, the sequence number of the planting area, and the second flow data, includes: Fitting the moisture content data of multiple locations in the planting area at the start time of the current monitoring cycle with the location information in the planting area to obtain a first moisture content function of each planting area at the start time of the current monitoring cycle; Fitting the moisture content data of multiple locations in the planting area at the end of the current monitoring cycle with the location information in the planting area to obtain a second moisture content function in each planting area at the end of the current monitoring cycle; A moisture content function of the planting area is determined according to the first moisture content function, the second moisture content function, the sequence number of the planting area and the second flow data.

4. The garden drip irrigation water-saving control method according to claim 3, characterized in that: Determining a moisture content function of a planting area according to the first moisture content function, the second moisture content function, the sequence number of the planting area and the second flow data includes: According to the formula Determine the unknown coefficient equation of the moisture content function of the planting area, where f i,j,2 (x, y, z) is the second moisture content function of the jth planting area along the i-th branch water supply pipeline, f i,j,1 (x, y, z) is the first moisture content function of the jth planting area along the i-th branch water supply pipeline, V i,j is the range of the jth planting area along the i-th branch water supply pipeline, (x, y, z) is V i,j The position coordinates in F 2,i is the second flow data of the i-th branch water supply pipeline, α1, α2, α3, α4 and α5 are unknown coefficients; Solving the undetermined coefficients according to the first moisture content function, the second moisture content function and the sequence number of each planting area, and the second flow data of each branch water supply pipeline, to obtain the solution value of the undetermined coefficients; The moisture content function of the planting area is determined according to the solved value of the undetermined coefficient and the undetermined coefficient equation of the moisture content function of the planting area.

5. The garden drip irrigation water-saving control method according to claim 4, characterized in that: Determining the adjustment condition of the second flow data according to the planting area moisture content function and the moisture content data includes: According to the formula Determine the adjustment conditions C1, C2, C3 and C4 of the second flow 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 water content change value, P p,2 is the second preset ratio, N min is the minimum number of cycles, if is the 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; In the case where any one of the adjustment conditions C1, C2, C3 and C4 of 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.

6. The garden drip irrigation water-saving control method according to claim 5, characterized in that: If there is a target branch water supply pipeline that needs to adjust the second flow data, determining the adjusted second flow data of the target branch water supply pipeline in the next monitoring cycle according to the moisture content data includes: Determine the constraint conditions of the optimization model according to the second flow data of the target branch water supply pipeline, the second moisture content function, the moisture content function of the planting area, and the adjustment condition of the second flow data satisfied by the target branch water supply pipeline; Determining an objective function of an optimization model according to the second flow data of the target branch water supply pipeline; The optimization model is solved according to the constraint conditions and the objective function of the optimization model to obtain the second flow data of the target branch water supply pipeline after adjustment in the next monitoring cycle.

7. The garden drip irrigation water-saving control method according to claim 6, characterized in that: According to the second flow data of the target branch water supply pipeline, the second moisture content function, the moisture content function of the planting area, and the adjustment condition of the second flow data satisfied by the target branch water supply pipeline, the constraint conditions of the optimization model are determined, including: According to the formula F 2,k +ΔF 2,k ≤F 2,max F 2,k -ΔF 2,k ≥0 Determine the constraints of the optimization model, where F 2,k is the second flow data of the kth target branch water supply pipeline, ΔF 2,k is the adjustment amount of the second flow data of the kth target branch water supply pipeline, n k is the number of planting areas along the k-th branch water supply pipeline, is the nth target branch water supply pipeline along the kth target branch water supply pipeline. k (1-P p,1 ) planting area’s second moisture content function, is the nth target branch water supply pipeline along the kth target branch water supply pipeline. k (1-P p,1 ) planting areas, j max For multiple planting areas of the k-th target branch water supply pipeline, The maximum value of the serial number of the planting area, is the jth point along the kth target branch water supply pipeline max +1 Second moisture content function of the planting area, is the jth point along the kth target branch water supply pipeline max +1 planting area range, is the jth point along the kth target branch water supply pipeline max +2 Second moisture content function for the planting area, is the jth point along the kth target branch water supply pipeline max +2 planting area range, is the nth target branch water supply pipeline along the kth target branch water supply pipeline. k The second moisture content function of the planting area, is the nth target branch water supply pipeline along the kth target branch water supply pipeline. k The range of planting areas, β is the preset ratio threshold, F 2,k,A is the second flow data after adjustment, F 2,max is the maximum value of the second flow data.

8. The garden drip irrigation water-saving control method according to claim 7, characterized in that: Determining the objective function of the optimization model according to the second flow data of the target branch water supply pipeline includes: 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.

9. A garden drip irrigation water-saving control system, characterized in that: include: 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; The second data acquisition module acquires the moisture content data at multiple positions in the planting area where the plants planted along the branch water supply pipeline are located at the start time and the end time of the current monitoring cycle, wherein a drip outlet of the branch water supply pipeline performs drip irrigation for a planting area, the planting area is a cubic area, and the drip outlet is located directly above the centroid of the cubic area; a data adjustment determination module, which determines whether the second flow data of each branch water supply pipeline needs to be adjusted according to the moisture content data and the sequence number of each planting area, wherein the sequence number of the planting area increases in sequence according to the water flow direction in the branch water supply pipeline; a first data determination module, which determines the adjusted second flow data of the target branch water supply pipeline in the next monitoring cycle according to the moisture content data if there is a target branch water supply pipeline that needs to adjust the second flow data; a second data determination module, which determines the adjusted first flow data of the main water supply pipeline according to the adjusted second flow data; a first parameter determination module, which determines the adjustment parameter of the valve of the target branch water supply pipeline according to the adjusted second flow data of the target branch water supply pipeline and the second flow data; a second parameter determination module, which determines the adjustment parameter of the valve of the main water supply pipeline according to the adjusted first flow data and the first flow data; The valve regulating module regulates the valve of the target branch water supply pipeline and the valve of the main water supply pipeline respectively according to the regulating parameters of the valve of the target branch water supply pipeline and the regulating parameters of the valve of the main water supply pipeline at the beginning of the next monitoring cycle.

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