Water and fertilizer concentration regulating device and method

Abstract

The application provides a water and fertilizer concentration regulation device and method, and relates to the technical field of agricultural irrigation. The device comprises: a fertilizer supply assembly for storing fertilizer; a fertilizer suction assembly connected with the fertilizer supply assembly and the liquid mixing assembly respectively, for sucking the fertilizer in the fertilizer supply assembly into the liquid mixing assembly; a liquid mixing assembly for storing the fertilizer and water, and mixing the fertilizer and water to obtain a mixed liquid; a multi-dimensional detection assembly for collecting the liquid level parameter and the concentration parameter of the mixed liquid in the liquid mixing assembly, and sending the liquid level parameter and the concentration parameter to a control assembly; and the control assembly is also connected with the fertilizer supply assembly, the fertilizer suction assembly and the liquid mixing assembly respectively, so as to regulate the liquid level parameter of the liquid mixing assembly and the fertilizer suction parameter of the fertilizer suction assembly according to the liquid level parameter and the concentration parameter according to a preset priority, thereby reducing the time for concentration deviation correction, and meeting the demand of modern agriculture for accurate and rapid regulation of water and fertilizer.

Description

Technical Field

[0001] This invention relates to the field of agricultural irrigation technology, and in particular to a water and fertilizer concentration control device and method. Background Technology

[0002] Integrated water and fertilizer management technology is a core technology for water and fertilizer conservation and crop yield improvement in modern agriculture. Its key lies in the precise and rapid adjustment of the concentration of the water and fertilizer mixture according to crop needs to ensure that the concentration of the irrigation supply is always kept within the target range. However, in actual irrigation operations, irrigation flow often fluctuates greatly, or the target value varies significantly for each irrigation due to differences in varieties and formulas. This causes the actual concentration of the mixture to deviate from the target value, requiring frequent concentration correction.

[0003] Current water and fertilizer concentration control devices are slow to respond to fluctuations in irrigation flow and take a long time to correct concentration deviations, making it difficult to meet the needs of modern agriculture for precise and rapid water and fertilizer control. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a water and fertilizer concentration control device and method.

[0005] This invention provides a water and fertilizer concentration control device, comprising: Fertilizer supply components for storing fertilizer; A fertilizer suction component is connected to the fertilizer supply component and the mixing component respectively, and is used to suck the fertilizer in the fertilizer supply component into the mixing component; A mixing assembly for storing the fertilizer and water and mixing them to obtain a mixture; A multidimensional detection component, connected to a control component, is used to collect the liquid level parameters and concentration parameters of the mixture in the mixing component, and send the liquid level parameters and concentration parameters to the control component; wherein, the concentration parameter includes at least one of conductivity parameters and pH parameters; The control component is also connected to the fertilizer supply component, the fertilizer absorption component, and the mixing component, respectively, to adjust the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to the liquid level parameter and the concentration parameter in accordance with a preset priority.

[0006] According to a water-fertilizer concentration control device provided by the present invention, the mixing assembly includes an inlet branch pipe for supplying water to the mixing assembly; wherein the inlet branch pipe is provided with an inlet opening valve; and / or, A fertilizer absorption valve is provided between the fertilizer absorption component and the liquid mixing component.

[0007] According to the present invention, a water and fertilizer concentration control device is provided, wherein the fertilizer supply component includes a first fertilizer storage tank, a first fertilizer storage tank, and at least two of the first fertilizer storage tanks; The fertilizer absorption assembly includes at least two of a first fertilizer absorption branch pipe, a second fertilizer absorption branch pipe, and a third fertilizer absorption branch pipe; The fertilizer absorption component is connected to the first fertilizer storage tank of the fertilizer supply component via the first fertilizer absorption branch pipe, to the second fertilizer storage tank of the fertilizer supply component via the second fertilizer absorption branch pipe, and to the third fertilizer storage tank of the fertilizer supply component via the third fertilizer absorption branch pipe.

[0008] According to the present invention, a water and fertilizer concentration regulating device is provided, wherein the fertilizer absorption component is a Venturi fertilizer absorption component; and / or, The first fertilizer suction branch pipe, the second fertilizer suction branch pipe and the third fertilizer suction branch pipe are each equipped with an electromagnetic switch valve, wherein the control mode of the electromagnetic switch valve is a periodic controllable mode.

[0009] According to the present invention, a water and fertilizer concentration control device is provided, wherein the fertilizer absorption parameters include fertilizer absorption flow rate parameters and fertilizer absorption cycle parameters.

[0010] According to the water-fertilizer concentration control device provided by the present invention, the preset priority from high to low is the liquid level height of the mixing component, the fertilizer absorption flow rate of the fertilizer absorption component, and the fertilizer absorption cycle of the fertilizer absorption component.

[0011] This invention also provides a method for regulating water and fertilizer concentration, comprising: Obtain the liquid level and concentration parameters of the mixture in the mixing component; The concentration comparison result is obtained by comparing the concentration parameter with the preset concentration parameter threshold. Based on the concentration comparison result and the liquid level parameter, the target control strategy is determined from the preset control strategy library. Based on the target control strategy, a rapid control command is generated; the rapid control command is used to control the liquid level parameters of the mixing component and the fertilizer absorption parameters of the fertilizer absorption component according to a preset priority.

[0012] According to a water-fertilizer concentration control method provided by the present invention, based on any of the above-described water-fertilizer concentration control devices, the step of controlling the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to a preset priority includes: If the concentration comparison result indicates that the concentration parameter is less than the preset concentration parameter threshold, then Determine the degree of deviation between the concentration parameter and the preset concentration parameter threshold, and according to the degree of deviation, sequentially increase the inlet opening valve of the inlet branch pipe of the mixing component to a first opening degree to maintain a stable liquid level, increase the fertilizer absorption valve to a second opening degree, and shorten the cycle interval of the electromagnetic switch valve to a first interval; or, If the concentration comparison result indicates that the concentration parameter is not less than the preset concentration parameter threshold, then Determine the degree of deviation between the concentration parameter and the preset concentration parameter threshold, and according to the degree of deviation, sequentially increase the water inlet opening valve of the water inlet branch pipe of the mixing component to the third opening degree to raise the liquid level, decrease the fertilizer absorption opening valve to the fourth opening degree, and extend the period interval of the electromagnetic switch valve to the second interval.

[0013] According to a water-fertilizer concentration control method provided by the present invention, the opening adjustment range of the fertilizer absorption valve is 0.6-0.8 times the opening adjustment range of the water inlet valve, and the periodic interval adjustment range of the electromagnetic switch valve is 0.3-0.5 times the opening adjustment range of the fertilizer absorption valve.

[0014] According to a water-fertilizer concentration control method provided by the present invention, the step of controlling the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to a preset priority includes: If the concentration comparison result shows that the difference between the concentration parameter and the preset concentration parameter threshold is not greater than the preset error threshold, then the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component are maintained.

[0015] This invention provides a water and fertilizer concentration control device and method. Fertilizer is stored in a fertilizer supply component, and then absorbed into a mixing component via a fertilizer absorption component. The mixing component stores fertilizer and water and mixes them to obtain a mixed solution. A multi-dimensional detection component collects the liquid level and concentration parameters of the mixed solution within the mixing component and sends these parameters to a control component. The control component adjusts the liquid level parameters of the mixing component and the fertilizer absorption parameters of the fertilizer absorption component according to preset priorities based on the liquid level and concentration parameters. This prioritizes the control of the core factors that have the greatest impact on the concentration control speed, avoiding blind adjustments. This reduces the time required for concentration control under conditions of large changes in irrigation flow, improves the efficiency and accuracy of integrated water and fertilizer operations, and meets the needs of modern agriculture for precise and rapid water and fertilizer control. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is one of the schematic diagrams of the water and fertilizer concentration control device provided by the present invention.

[0018] Figure 2 This is the second schematic diagram of the water and fertilizer concentration control device provided by the present invention.

[0019] Figure 3 This is a schematic flowchart of the water and fertilizer concentration control method provided by the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0022] In various irrigation scenarios such as open fields, greenhouses, and orchards, there are situations where irrigation flow rates vary significantly. Currently, concentration control is achieved by simultaneously adjusting parameters such as liquid level, fertilizer flow rate, and fertilizer absorption cycle. However, because the degree of influence of each factor on the control speed is not distinguished, the core influencing factors are not prioritized for control, resulting in a longer concentration control time.

[0023] Based on this, the following combination Figures 1 to 3 The present invention describes the water and fertilizer concentration control device and method.

[0024] The water and fertilizer concentration control device provided in this embodiment of the invention includes: Fertilizer supply components for storing fertilizer; A fertilizer suction component is connected to the fertilizer supply component and the mixing component respectively, and is used to suck the fertilizer in the fertilizer supply component into the mixing component; A mixing assembly for storing the fertilizer and water and mixing them to obtain a mixture; A multidimensional detection component, connected to a control component, is used to collect the liquid level parameters and concentration parameters of the mixture in the mixing component, and send the liquid level parameters and concentration parameters to the control component; wherein, the concentration parameter includes at least one of conductivity parameters and pH parameters; The control component is also connected to the fertilizer supply component, the fertilizer absorption component, and the mixing component, respectively, to adjust the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to the liquid level parameter and the concentration parameter in accordance with a preset priority.

[0025] The fertilizer supply component is a container unit used to store one or more liquid or solid soluble fertilizers. It should be noted that the fertilizer supply component can be implemented in various ways, such as a separate storage tank or an integrated fertilizer container; this embodiment does not limit the specific implementation.

[0026] The fertilizer suction unit is an actuator that extracts fertilizer from the fertilizer supply unit and delivers it to the mixing unit. It should be noted that the fertilizer suction unit can extract fertilizer from the fertilizer supply unit and deliver it to the mixing unit through a peristaltic pump or a diaphragm pump, etc., but this embodiment does not limit this.

[0027] The mixing assembly is also a container unit used to receive fertilizer from the fertilizer absorption assembly and external water. It should be noted that there are many ways for the mixing assembly to perform mixing, such as using a stirring paddle or a circulating pump, and this embodiment does not limit this method.

[0028] The multidimensional detection component is used to sense the state of the mixture in the mixing component in real time.

[0029] In some embodiments, the multidimensional detection component may include a level detection unit, a concentration detection unit, and a flow-related detection unit.

[0030] The liquid level detection unit can be a sensor that detects the liquid level height; the concentration detection unit can include at least one of an EC detection unit and a pH detection unit; and the flow rate correlation detection unit can be a sensor that detects the flow rate. The specific sensor model can be selected according to actual needs, and this embodiment does not impose any limitations on it.

[0031] The control component may include a processor, a communication interface, a memory, and a communication bus. The processor, communication interface, and memory communicate with each other via the communication bus. The processor can call a pre-stored control strategy based on the priority of influencing factors in the memory. Based on the control strategy, it generates a rapid control command according to the liquid level and concentration parameters, and sends the rapid control command to the fertilizer absorption component and the mixing component to adjust the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to the preset priority.

[0032] The water and fertilizer concentration control device provided in this invention stores fertilizer through a fertilizer supply component and draws the fertilizer from the fertilizer supply component into a mixing component through a fertilizer absorption component. The mixing component stores fertilizer and water and mixes them to obtain a mixed liquid. A multidimensional detection component collects the liquid level and concentration parameters of the mixed liquid in the mixing component and sends them to a control component. The control component adjusts the liquid level parameters of the mixing component and the fertilizer absorption parameters of the fertilizer absorption component according to the liquid level and concentration parameters and according to a preset priority. This allows for priority control of the core factors that have the greatest impact on the concentration control speed, avoiding blind adjustment, thereby reducing the concentration control time under conditions of large changes in irrigation flow, improving the efficiency and accuracy of integrated water and fertilizer operations, and meeting the needs of modern agriculture for precise and rapid water and fertilizer control.

[0033] Based on the above embodiments, the mixing assembly includes a water inlet branch pipe for supplying water to the mixing assembly; wherein, the water inlet branch pipe is provided with a water inlet opening valve.

[0034] In some embodiments, a fertilizer suction opening valve is provided between the fertilizer suction assembly and the liquid mixing assembly.

[0035] The inlet valve is used to adjust the inlet flow rate of the inlet branch pipe, thereby controlling the liquid level of the mixing assembly.

[0036] The fertilizer suction opening valve is used to continuously adjust the flow rate of the fertilizer suction pipeline of the fertilizer suction assembly.

[0037] It should be noted that both the inlet valve and the fertilizer suction valve can be electromagnetic regulating valves, electric regulating valves, etc., as long as they can achieve proportional control of the opening. This embodiment does not impose any restrictions on this.

[0038] Understandably, by setting separate inlet valves and fertilizer suction valves, the control components can independently regulate the liquid level and fertilizer suction flow rate, providing hardware support for achieving regulation according to a preset gradient.

[0039] Based on any of the above embodiments, the fertilizer supply assembly includes a first fertilizer storage tank, a first fertilizer storage tank, and at least two of the first fertilizer storage tanks; The fertilizer absorption assembly includes at least two of a first fertilizer absorption branch pipe, a second fertilizer absorption branch pipe, and a third fertilizer absorption branch pipe; The fertilizer absorption component is connected to the first fertilizer storage tank of the fertilizer supply component via the first fertilizer absorption branch pipe, to the second fertilizer storage tank of the fertilizer supply component via the second fertilizer absorption branch pipe, and to the third fertilizer storage tank of the fertilizer supply component via the third fertilizer absorption branch pipe.

[0040] The first, second, and third fertilizer storage tanks are used to store different types of fertilizers. For example, the first fertilizer storage tank can store nitrogen fertilizer, the second fertilizer storage tank can store phosphate fertilizer, and the third fertilizer storage tank can store phosphate fertilizer.

[0041] The first, second, and third fertilizer suction branches are independent pipelines that draw fertilizer from their respective storage tanks into the mixing assembly. In other words, the fertilizer supply assembly and the fertilizer suction assembly are correspondingly configured. For example, if the fertilizer supply assembly has a first fertilizer storage tank, then the fertilizer suction assembly has a corresponding first fertilizer suction branch. If the fertilizer supply assembly only has a second and a third fertilizer storage tank, then the fertilizer suction assembly does not have a first fertilizer suction branch.

[0042] It is understandable that by setting up multiple independent fertilizer supply branches, the embodiments of the present invention can provide differentiated fertilizer supply, provide hardware support for precise control of the proportion of each nutrient element in the mixed liquid, and provide a basis for adapting to the mixing needs of multiple fertilizers under different irrigation scenarios.

[0043] Based on any of the above embodiments, the fertilizer absorption component is a Venturi fertilizer absorption component.

[0044] Among them, the Venturi fertilizer suction component can realize the self-suction of fertilizer by utilizing the fluid Venturi effect. Thus, in this embodiment, there is no need to add an additional fertilizer suction pump, which can extract fertilizer from the fertilizer supply component and transport it to the actuator of the mixing component.

[0045] In some embodiments, the first fertilizer suction branch pipe, the second fertilizer suction branch pipe and the third fertilizer suction branch pipe are respectively equipped with electromagnetic switch valves, wherein the control mode of the electromagnetic switch valves is a periodic controllable mode.

[0046] Among them, the controllable cycle mode means that the single opening duration and cycle interval of the electromagnetic switching valve can be adjusted by the control component.

[0047] It should be noted that the opening duration and cycle interval of the electromagnetic switch valve can be dynamically adjusted within the control range of the control component. The specific adjustment method can be set according to the actual working conditions, and this embodiment does not impose any specific limitations on this.

[0048] Understandably, by further regulating the flow rate of the fertilizer absorption pipeline through a simple and inexpensive Venturi fertilizer absorption component, and by providing a low-priority fine-tuning means with a periodically controllable electromagnetic switching valve, it is possible to achieve fine-tuning of the fertilizer absorption amount of the fertilizer absorption component and improve the accuracy of concentration control.

[0049] Based on any of the above embodiments, the fertilizer absorption parameters include fertilizer absorption flow rate parameters and fertilizer absorption cycle parameters.

[0050] Among them, the fertilizer absorption flow rate parameter is used to characterize the volume or mass of fertilizer that is absorbed into the mixing component through the fertilizer absorption pipeline per unit time.

[0051] The fertilizer absorption cycle parameter is used to characterize the on / off cycle of the solenoid valve. In some embodiments, the fertilizer absorption cycle parameter may include the opening duration and closing interval of the solenoid valve.

[0052] It should be noted that the fertilizer absorption flow rate parameter is continuously changed by adjusting the fertilizer absorption opening valve, while the fertilizer absorption cycle parameter is discretely adjusted by adjusting the cycle controllable mode of the electromagnetic switch valve.

[0053] Understandably, breaking down fertilizer absorption parameters into flow rate and cycle can provide different physical execution paths for secondary, fine-tuning priorities, thus providing a basis for hierarchical control.

[0054] Based on any of the above embodiments, the preset priorities, from high to low, are the liquid level height of the mixing component, the fertilizer absorption flow rate of the fertilizer absorption component, and the fertilizer absorption cycle of the fertilizer absorption component.

[0055] The liquid level height refers to the horizontal position of the mixed liquid within the mixing assembly.

[0056] It should be noted that when irrigation flow rates change significantly, such as switching from a 5-mu (approximately 0.33 hectares) irrigation area to a 10-mu (approximately 0.67 hectares) irrigation area, the outflow of the mixed liquor from the mixing unit increases significantly, and the water replenishment rate accelerates accordingly, resulting in rapid dilution of the mixed liquor concentration. Verification has shown that adjusting the mixed liquor concentration from the current concentration to the target concentration by prioritizing the control of the liquid level is the fastest response method.

[0057] Understandably, by using liquid level as the core control factor, fertilizer flow rate as the secondary control factor, and fertilizer absorption cycle as the fine-tuning supplementary factor, and executing the control in the order of priority of liquid level, fertilizer flow rate, and fertilizer absorption cycle, the control logic of the control components can be clearly distinguished, and the target concentration can be approached by the control method with the fastest response and the most significant effect, thereby minimizing the concentration correction time.

[0058] To illustrate the water and fertilizer concentration control device provided in this implementation, clarify the priority of the influence of liquid level, fertilizer absorption pipeline flow rate and fertilizer absorption cycle, and build a hardware system adapted to this priority, a specific example is provided below.

[0059] like Figure 1 As shown, the water and fertilizer concentration control device includes a mixing tank for storing the mixed liquid, and a liquid level detection unit installed on its inner wall. The liquid level detection unit is used to collect liquid level height data in real time to provide data support for priority control.

[0060] The liquid level detection unit, a height sensor, is the core detection component of the water and fertilizer concentration control device, directly affecting the control efficiency. The mixing tank has a volume of 100L, and the liquid level height sensor is an RS485 model installed on the inner wall, with a detection range of 0-1.8m and an accuracy of ±0.3%.

[0061] The water and fertilizer concentration control device includes a multi-channel fertilizer supply unit, which includes fertilizer storage tanks A, B, and C. Each of the fertilizer storage tanks A, B, and C is connected to a Venturi fertilizer absorption assembly via an independent pipeline to ensure the independence of fertilizer supply and to meet the precise adjustment requirements of fertilizer absorption flow.

[0062] The water and fertilizer concentration control device includes a Venturi fertilizer absorption component. The electromagnetic valve of the Venturi fertilizer absorption component adopts a periodic control mode as a supplement to the secondary control method. The amount of fertilizer absorbed can be finely adjusted by adjusting the opening time and periodic interval.

[0063] The venturi fertilizer absorption assembly is a DN20 venturi tube. Each fertilizer channel corresponds to one electromagnetic switch valve, model 2W-200-20, with a response time ≤0.05s, an opening duration adjustment range of 0-10s, and a cycle interval adjustment range of 0-5s. The A, B, and C fertilizer storage tanks each have a volume of 250L. Each tank outlet pipeline is equipped with a DN25 type opening valve with an opening adjustment range of 0-100% and a response time ≤0.08s.

[0064] The water and fertilizer concentration control device includes a multi-dimensional detection module, which comprises a liquid level detection unit for liquid level detection, an EC detection unit for EC detection, and a pH detection unit for pH detection. In some embodiments, the irrigation flow rate can be indirectly sensed by measuring the rate of change of liquid level height ΔH / Δt by the liquid level detection unit. This eliminates the need for additional complex flow sensors and provides a basis for priority control under different flow rates, thereby reducing equipment costs.

[0065] The EC detection unit is model EC-200, with a measurement range of 0-15 mS / cm and an accuracy of ±0.01 mS / cm. The pH detection unit is model PH-300, with a measurement range of 0-14 pH and an accuracy of ±0.02 pH. Both the EC and pH detection units can be installed in the middle of the mixing tank. The flow correlation detection component can be integrated into the liquid level detection unit, and ΔH / Δt is calculated using an algorithm.

[0066] The water and fertilizer concentration control device includes a differentiated control valve group. Among the differentiated control valve group, the mixing tank pipeline valve is the core control valve, which is used to prioritize the adjustment of the liquid level and eliminate the interference of the most influential factors. The fertilizer suction pipeline valve is the secondary control valve, which matches the adjustment intensity according to priority to ensure that the fertilizer suction flow rate is suitable for the concentration requirements.

[0067] The mixing tank pipeline valve is a DN40 type electromagnetic regulating valve, with an opening adjustment range of 0-100% and an inlet water flow adjustment range of 0-5m³ / h. 3 / h.

[0068] The intelligent control module, also known as the controller, has a built-in priority adaptation algorithm and is the core control unit. It can analyze and detect data in the order of liquid level, fertilizer suction pipeline flow, and fertilizer suction cycle, and output targeted control commands, prioritizing the adjustment of core factors to shorten the control time.

[0069] The intelligent control module can utilize an STM32F407 microcontroller with a built-in priority adaptation algorithm, a data sampling period of ≤0.5s, and a core factor response delay of ≤0.1s. The priority adaptation algorithm, also known as a control algorithm, can be derived from any of the following water and fertilizer concentration regulation methods.

[0070] like Figure 2 As shown, the water and fertilizer concentration control device can measure the actual EC, process the actual EC and EC target value through the control algorithm, prioritize adjust the opening of the valve of the mixing tank pipeline to adjust the liquid level of the mixing tank, secondly adjust the opening of the valve of the fertilizer suction pipeline to adjust the maximum flow rate of the three fertilizer suction lines, and finally adjust the fertilizer suction cycle to adjust the amount of fertilizer suction within one cycle, until the difference between the actual EC and the EC target value is not greater than the preset error threshold.

[0071] The water and fertilizer concentration control method provided in this invention identifies the liquid level height as having the greatest impact on the target concentration control speed, followed by the flow rate of the fertilizer suction pipeline, and the fertilizer suction cycle as having the least impact. Based on the real-time acquisition of key parameters by the multi-dimensional detection module and the linkage adjustment of the opening valves of the mixing tank pipeline, the fertilizer suction pipeline, and the Venturi fertilizer suction switch valve according to the priority of influence by the intelligent control module, a closed-loop logic of priority control, flow adaptation, and rapid calibration is constructed. This method can accurately control the core influencing factors and collaboratively solve the problem of long concentration control time caused by large changes in irrigation flow according to the priority order of liquid level height, fertilizer suction pipeline flow rate, and fertilizer suction cycle, thereby improving the efficiency and accuracy of integrated water and fertilizer operation.

[0072] The water and fertilizer concentration control method provided by the present invention is described below. The water and fertilizer concentration control method described below can be referred to in correspondence with the water and fertilizer concentration control device described above.

[0073] Figure 3 This is a flowchart illustrating the water and fertilizer concentration control method provided by the present invention, as shown below. Figure 3 As shown, the method includes the following steps.

[0074] Step 301: Obtain the liquid level and concentration parameters of the mixture in the mixing component; Step 302: Compare the concentration parameter with the preset concentration parameter threshold to obtain the concentration comparison result, and determine the target control strategy from the preset control strategy library based on the concentration comparison result and the liquid level parameter; Step 303: Generate a rapid control command based on the target control strategy; The rapid control command is used to adjust the liquid level parameters of the mixing component and the fertilizer absorption parameters of the fertilizer absorption component according to a preset priority.

[0075] The liquid level and concentration parameters are physical quantity signals that are collected in real time by the aforementioned multidimensional detection components and sent to the control components.

[0076] It should be noted that the acquisition of liquid level and concentration parameters can be continuous and real-time, or it can be triggered periodically at preset time intervals, such as once every 0.5 seconds or 1 second. This embodiment does not limit this.

[0077] The preset control strategy library is a collection of various control schemes for different deviation states and different liquid level states. In some embodiments, the preset control strategy library can be pre-stored in the control component.

[0078] It should be noted that the concentration comparison results can be several qualitative or quantitative comparison results, such as below the threshold, above the threshold, or within the threshold error range. Based on this, condition matching can be performed based on the current state qualitatively or quantitatively described by the concentration comparison results, and the corresponding control strategy can be selected from the preset control strategy library to obtain the target control strategy.

[0079] For example, a rapid control command could be a specific numerical signal such as increasing the opening of the inlet valve by 10% or shortening the cycle interval of the solenoid switch valve to 5 seconds.

[0080] It should be noted that there are many ways to obtain specific rapid control instructions based on the target control strategy, and you can choose according to the actual working conditions. This embodiment does not limit this.

[0081] The water and fertilizer concentration control method provided in this invention obtains the liquid level and concentration parameters of the mixed liquid in the mixing component, compares the concentration parameters with a preset concentration parameter threshold to obtain a concentration comparison result, determines a target control strategy from a preset control strategy library based on the concentration comparison result and the liquid level parameters, and generates a rapid control command based on the target control strategy. The rapid control command is used to control the liquid level parameters of the mixing component and the fertilizer absorption parameters of the fertilizer absorption component according to a preset priority. This allows for priority control of the core factors that have the greatest impact on the concentration control speed, avoids blind adjustment, reduces the time required for concentration deviation correction, improves the efficiency and accuracy of integrated water and fertilizer operations, and meets the needs of modern agriculture for precise and rapid water and fertilizer control.

[0082] Based on any of the above embodiments, and based on the water-fertilizer concentration control device described in any of the foregoing claims, the step of adjusting the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to a preset priority includes: If the concentration comparison result indicates that the concentration parameter is less than the preset concentration parameter threshold, then Determine the degree of deviation between the concentration parameter and the preset concentration parameter threshold, and according to the degree of deviation, sequentially increase the water inlet opening valve of the water inlet branch pipe of the mixing component to a first opening degree to maintain a stable liquid level, increase the fertilizer absorption opening valve to a second opening degree, and shorten the period interval of the electromagnetic switch valve to a first interval.

[0083] The degree of deviation is used to measure how much the current concentration deviates from the target concentration.

[0084] The degree of deviation can be the absolute value of the difference between the concentration parameter and the preset concentration parameter threshold, or it can be the relative proportion of the difference between the concentration parameter and the preset concentration parameter threshold.

[0085] The first opening degree for maintaining a stable liquid level is the opening degree value that allows the inlet flow rate of the inlet branch pipe to maintain the liquid level in the mixing component at a level change less than a set threshold.

[0086] The second opening degree is an opening value that can increase the fertilizer absorption flow rate of the fertilizer absorption component to bring the concentration closer to the preset concentration parameter threshold.

[0087] Compared to the previous cycle interval, the first interval is a shorter cycle interval value, which is used to further fine-tune the fertilizer absorption flow rate of the fertilizer absorption component.

[0088] It should be noted that the degree of deviation can be divided into multiple deviation levels, such as small deviation, medium deviation and large deviation. The specific values ​​of the first opening, the second opening and the first interval change accordingly under different deviation levels. This embodiment does not limit this.

[0089] Verification has shown that, compared to simply increasing the fertilizer absorption flow rate, prioritizing the stabilization of the liquid level in this embodiment can better avoid repeated concentration fluctuations caused by liquid level fluctuations. By performing the control operation in the order of priority of liquid level, flow rate, and periodic fine-tuning, the overall speed and stability of concentration control can be improved.

[0090] In some embodiments, based on the water-fertilizer concentration control device described in any of the foregoing embodiments, the step of adjusting the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to a preset priority includes: If the concentration comparison result indicates that the concentration parameter is not less than the preset concentration parameter threshold, then Determine the degree of deviation between the concentration parameter and the preset concentration parameter threshold, and according to the degree of deviation, sequentially increase the water inlet opening valve of the water inlet branch pipe of the mixing component to the third opening degree to raise the liquid level, decrease the fertilizer absorption opening valve to the fourth opening degree, and extend the period interval of the electromagnetic switch valve to the second interval.

[0091] The third opening is the opening value that allows the inlet flow rate of the inlet branch pipe to raise the liquid level in the mixing assembly, thereby diluting the concentration of the mixture.

[0092] The fourth opening is an opening value that can reduce the fertilizer absorption flow rate of the fertilizer absorption component to a level that brings the concentration closer to the preset concentration parameter threshold.

[0093] Compared to the previous cycle interval, the second interval is a longer cycle interval value, which is used to further fine-tune the fertilizer absorption flow rate of the fertilizer absorption component.

[0094] It should be noted that the specific values ​​of the third opening, the fourth opening, and the second interval are also adaptively adjusted according to the degree of deviation, and this embodiment does not limit this.

[0095] The working principle and technical effect of adjusting the liquid level parameters of the mixing component and the fertilizer absorption parameters of the fertilizer absorption component according to the preset priority when the concentration parameter is not less than the preset concentration parameter threshold is basically the same as the working principle and technical effect of adjusting the liquid level parameters of the mixing component and the fertilizer absorption parameters of the fertilizer absorption component according to the preset priority when the concentration parameter is less than the preset concentration parameter threshold, and will not be repeated here.

[0096] In some embodiments, the method further includes increasing the fertilizer suction valve to a second opening degree in conjunction with the irrigation flow rate.

[0097] In some embodiments, adjusting the fertilizer absorption parameters of the fertilizer absorption component further includes extending the opening duration of the electromagnetic switch valve to a first duration based on the degree of deviation, or shortening the opening duration of the electromagnetic switch valve to a second duration based on the degree of deviation.

[0098] In some embodiments, the target control strategy includes a preset liquid level range. When the liquid level H is lower than the minimum threshold Hmin or higher than the maximum threshold Hmax of the preset liquid level range, a rapid adjustment command (xx command) can be output. This rapid adjustment command is used to pause the adjustment of fertilizer absorption flow rate and fertilizer absorption cycle. This allows the liquid level to be preferentially adjusted to the preset range before subsequent concentration calibration, avoiding control failure caused by key influencing factors.

[0099] Based on any of the above embodiments, the opening adjustment range of the fertilizer suction valve is 0.6-0.8 times the opening adjustment range of the water inlet valve, and the period interval adjustment range of the electromagnetic switch valve is 0.3-0.5 times the opening adjustment range of the fertilizer suction valve.

[0100] It should be noted that the proportional relationship between the above adjustment ranges is to match the priority of the influence of each regulatory factor on the concentration regulation speed. The specific adjustment range values ​​can be adaptively adjusted according to factors such as the specifications of the mixing components, pipeline characteristics, and fertilizer type in the actual scenario.

[0101] Understandably, the liquid level, as the core control factor, has the largest adjustment range, followed by the fertilizer absorption flow rate, which is a secondary control factor, and the fertilizer absorption cycle, which is a fine-tuning factor, has the smallest adjustment range. This can prevent the excessive adjustment of secondary factors from masking the control effect of core factors and ensure control efficiency.

[0102] Based on any of the above embodiments, the step of adjusting the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to a preset priority includes: If the concentration comparison result shows that the difference between the concentration parameter and the preset concentration parameter threshold is not greater than the preset error threshold, then the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component are maintained.

[0103] The preset error threshold refers to the pre-set allowable range of concentration deviation. If the actual concentration is within the preset error threshold, it can be considered to meet the irrigation requirements. In this embodiment, the specific value range of the preset error threshold is not limited.

[0104] Maintaining the liquid level parameters of the mixing component and the fertilizer absorption parameters of the fertilizer absorption component means not making targeted adjustments to the opening degree or cycle interval of the inlet valve, fertilizer absorption valve and solenoid switch valve. In some embodiments, the liquid level is kept stable and the fertilizer absorption cycle remains unchanged. Then, the flow rate of the fertilizer absorption pipeline can be finely adjusted according to the flow status to ensure the concentration is stable.

[0105] Understandably, when the concentration comparison result shows that the difference between the concentration parameter and the preset concentration parameter threshold is not greater than the preset error threshold, it can be determined that the current concentration is within the target range. On this basis, maintaining a stable liquid level to ensure a stable mixed concentration can avoid unnecessary adjustment actions that introduce oscillations and ensure the concentration stability of the irrigation process.

[0106] To illustrate the function of the water and fertilizer concentration control method provided in this implementation, a specific example is given below.

[0107] The preset target EC value is E0=2.8mS / cm, the preset liquid level range is [Hmin=1.0m, Hmax=1.5m], the fertilizer absorption baseline cycle parameters are t1 baseline=12s, t2 baseline=70s, and the flow rate adaptation threshold is |ΔH / Δt|≥0.05m / min for high flow rate, and |ΔH / Δt|≤0.02m / min for low flow rate; where t1 is the start time and t2 is the cycle interval.

[0108] First, start the control device and open the valve on the mixing tank pipeline to inject clean water to a level of 1.0m. Then, the multi-dimensional detection module collects data in real time. Based on the EC value of the clean water, it determines that the initial state is E=0.4mS / cm, and the detected ΔH / Δt=0.01m / min indicates that it is a low flow state. If E < E0, then output instructions according to priority: first maintain the opening valve of the mixing tank pipeline at 30% of the stable liquid level, then gently adjust the opening valve of the fertilizer suction pipeline to 40%, and extend t1 to 18s.

[0109] After running for 1 minute, ΔH / Δt = 0.06 m / min was detected, indicating a high flow rate. E = 1.0 mS / cm, which is still lower than E0. Therefore, adjustments were made according to priority: the opening valve of the mixing tank pipeline was increased to 60% first to strengthen the control of the core factor and stabilize the liquid level. Then, the opening valve of the fertilizer suction pipeline was significantly increased to 70% to increase the intensity of the secondary factor. t1 was extended to 25s for further fine-tuning.

[0110] After running for another 40 seconds, E=2.6mS / cm was detected, which is close to the target value, and ΔH / Δt=0.03m / min, which is determined to be a medium flow state. The control module prioritizes maintaining the opening valve of the mixing tank pipeline at 40% to stabilize the liquid level, and then fine-tunes the opening valve of the fertilizer suction pipeline to 55% to achieve minor factor fine-tuning. t1 is maintained for 25s.

[0111] After running for another 20 seconds, if E=2.8mS / cm and |E-E0|≤0.05mS / cm is detected, then the control will prioritize maintaining a stable liquid level, and the opening valve of the fertilizer suction pipeline and the fertilizer suction cycle will remain unchanged, so that the concentration is stable and meets the standard.

[0112] The method provided in this invention significantly shortens the concentration control time by prioritizing the adjustment of liquid level height, secondarily not affecting the fertilizer absorption flow rate, and finally fine-tuning the fertilizer absorption cycle. It achieves rapid and accurate concentration control in irrigation flow fluctuation scenarios, solves the problem of lagging control in traditional devices, and meets the needs of efficient water and fertilizer management in modern agriculture.

[0113] Figure 4 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 4As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430, and a communication bus 440, wherein the processor 410, the communication interface 420, and the memory 430 communicate with each other through the communication bus 440. The processor 410 can call logical instructions in the memory 430 to execute a water-fertilizer concentration control method, which includes: acquiring the liquid level parameters and concentration parameters of the mixed liquid in the mixing component; comparing the concentration parameters with a preset concentration parameter threshold to obtain a concentration comparison result; determining a target control strategy from a preset control strategy library based on the concentration comparison result and the liquid level parameters; generating a rapid control instruction based on the target control strategy; the rapid control instruction is used to control the liquid level parameters of the mixing component and the fertilizer absorption parameters of the fertilizer absorption component according to a preset priority.

[0114] Furthermore, the logical instructions in the aforementioned memory 430 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0115] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the water-fertilizer concentration control method provided by the above methods. The method includes: acquiring the liquid level parameter and concentration parameter of the mixed liquid in the mixing component; comparing the concentration parameter with a preset concentration parameter threshold to obtain a concentration comparison result; determining a target control strategy from a preset control strategy library based on the concentration comparison result and the liquid level parameter; generating a rapid control instruction based on the target control strategy; the rapid control instruction is used to control the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to a preset priority.

[0116] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements the water-fertilizer concentration control method provided by the above methods. The method includes: acquiring the liquid level parameter and concentration parameter of the mixed liquid in the mixing component; comparing the concentration parameter with a preset concentration parameter threshold to obtain a concentration comparison result; determining a target control strategy from a preset control strategy library based on the concentration comparison result and the liquid level parameter; generating a rapid control instruction based on the target control strategy; the rapid control instruction is used to control the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to a preset priority.

[0117] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0118] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water and fertilizer concentration regulating device, characterized in that, include: Fertilizer supply components for storing fertilizer; A fertilizer suction component is connected to the fertilizer supply component and the mixing component respectively, and is used to suck the fertilizer in the fertilizer supply component into the mixing component; A mixing assembly for storing the fertilizer and water and mixing them to obtain a mixture; A multidimensional detection component, connected to a control component, is used to collect the liquid level parameters and concentration parameters of the mixture in the mixing component, and send the liquid level parameters and concentration parameters to the control component; wherein, the concentration parameter includes at least one of conductivity parameters and pH parameters; The control component is also connected to the fertilizer supply component, the fertilizer absorption component, and the mixing component, respectively, to adjust the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to the liquid level parameter and the concentration parameter in accordance with a preset priority.

2. The water and fertilizer concentration regulating device according to claim 1, characterized in that, The mixing assembly includes an inlet branch pipe for supplying water to the mixing assembly; wherein the inlet branch pipe is equipped with an inlet opening valve; and / or, A fertilizer absorption valve is provided between the fertilizer absorption component and the liquid mixing component.

3. The water and fertilizer concentration regulating device according to claim 1, characterized in that, The fertilizer supply assembly includes a first fertilizer storage tank, a first fertilizer storage tank, and at least two of the first fertilizer storage tanks; The fertilizer absorption assembly includes at least two of a first fertilizer absorption branch pipe, a second fertilizer absorption branch pipe, and a third fertilizer absorption branch pipe; The fertilizer absorption component is connected to the first fertilizer storage tank of the fertilizer supply component via the first fertilizer absorption branch pipe, to the second fertilizer storage tank of the fertilizer supply component via the second fertilizer absorption branch pipe, and to the third fertilizer storage tank of the fertilizer supply component via the third fertilizer absorption branch pipe.

4. The water and fertilizer concentration regulating device according to claim 3, characterized in that, The fertilizer absorption component is a Venturi fertilizer absorption component; and / or, The first fertilizer suction branch pipe, the second fertilizer suction branch pipe and the third fertilizer suction branch pipe are each equipped with an electromagnetic switch valve, wherein the control mode of the electromagnetic switch valve is a periodic controllable mode.

5. The water and fertilizer concentration regulating device according to claim 4, characterized in that, The fertilizer absorption parameters include fertilizer absorption flow rate parameters and fertilizer absorption cycle parameters.

6. The water and fertilizer concentration regulating device according to claim 1, characterized in that, The preset priorities, from high to low, are the liquid level of the mixing component, the fertilizer absorption flow rate of the fertilizer absorption component, and the fertilizer absorption cycle of the fertilizer absorption component.

7. A method for regulating water and fertilizer concentration, characterized in that, include: Obtain the liquid level and concentration parameters of the mixture in the mixing component; The concentration comparison result is obtained by comparing the concentration parameter with the preset concentration parameter threshold. Based on the concentration comparison result and the liquid level parameter, the target control strategy is determined from the preset control strategy library. Based on the target control strategy, a rapid control command is generated; the rapid control command is used to control the liquid level parameters of the mixing component and the fertilizer absorption parameters of the fertilizer absorption component according to a preset priority.

8. The water and fertilizer concentration control method according to claim 7, characterized in that, Based on the water-fertilizer concentration control device according to any one of claims 1-6, the step of adjusting the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component according to a preset priority includes: If the concentration comparison result indicates that the concentration parameter is less than the preset concentration parameter threshold, then Determine the degree of deviation between the concentration parameter and the preset concentration parameter threshold, and according to the degree of deviation, sequentially increase the inlet opening valve of the inlet branch pipe of the mixing component to a first opening degree to maintain a stable liquid level, increase the fertilizer absorption valve to a second opening degree, and shorten the cycle interval of the electromagnetic switch valve to a first interval; or, If the concentration comparison result indicates that the concentration parameter is not less than the preset concentration parameter threshold, then Determine the degree of deviation between the concentration parameter and the preset concentration parameter threshold, and according to the degree of deviation, sequentially increase the water inlet opening valve of the water inlet branch pipe of the mixing component to the third opening degree to raise the liquid level, decrease the fertilizer absorption opening valve to the fourth opening degree, and extend the period interval of the electromagnetic switch valve to the second interval.

9. The water and fertilizer concentration control method according to claim 8, characterized in that, The opening adjustment range of the fertilizer suction valve is 0.6-0.8 times that of the water inlet valve, and the period interval adjustment range of the electromagnetic switch valve is 0.3-0.5 times that of the fertilizer suction valve.

10. The water and fertilizer concentration control method according to claim 7, characterized in that, The step of adjusting the liquid level parameters of the mixing component and the fertilizer absorption parameters of the fertilizer absorption component according to a preset priority includes: If the concentration comparison result shows that the difference between the concentration parameter and the preset concentration parameter threshold is not greater than the preset error threshold, then the liquid level parameter of the mixing component and the fertilizer absorption parameter of the fertilizer absorption component are maintained.

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