Multi-branch cleaning loop based on agricultural dispensing system and control method

Abstract

The invention relates to a multi-branch cleaning loop based on an agricultural pesticide dispensing system and a control method, and belongs to the technical field of agricultural precise pesticide application. The method comprises the following steps: acquiring dosage related parameters, generating a key parameter group, starting a targeted pre-cleaning process, and dynamically adjusting cleaning pressure and duration; a multi-mode pretreatment strategy is adopted, liquid and solid agents are subjected to homogenization stirring or secondary dilution, and standard liquid medicine is formed through metering and stirring linkage control and homogenization verification; a multi-branch independent control cleaning loop is constructed, a cleaning medium is pressurized and distributed to all functional areas for graded directional cleaning, and the cleaning effect is monitored; and executing linkage reset of system components, and carrying out classified storage and uploading on whole-process data by adopting dual modes of local encryption and cloud backup. The efficient, accurate and full-process traceable automatic cleaning of the dispensing system is realized, and the dispensing quality and the operation reliability are improved.

Description

Technical Field

[0001] This invention belongs to the field of precision pesticide application technology in agriculture, specifically relating to a multi-branch cleaning loop and control method based on an agricultural pesticide application system. Background Technology

[0002] Precise and efficient pesticide formulation is crucial for ensuring effective control of agricultural pests and diseases, reducing the risk of pesticide damage, and minimizing environmental pollution. Currently, pesticide formulation in agricultural production mainly operates under two modes: The first relies heavily on manual experience, where operators estimate dosages based on experience and manually weigh, pour, stir, and mix the pesticides. This mode is not only labor-intensive and inefficient, but also suffers from significant errors in proportions (usually exceeding 10%) due to human factors, directly impacting application effectiveness and easily leading to incomplete control or crop damage. The second mode uses partially automated, simple pesticide formulation devices. These devices often focus on a single function, such as stirring or simple metering, and are typically only suitable for one type of liquid or solid pesticide, exhibiting significant functional limitations.

[0003] Existing technical solutions suffer from the following significant drawbacks: First, regarding dosing accuracy and control, the lack of high-precision metering modules and closed-loop control logic prevents precise proportional dosing of pesticides and water, hindering the development of precision agriculture. Second, in terms of pesticide adaptability, especially for solid formulations such as wettable powders and water-dispersible granules, existing equipment generally lacks dedicated pretreatment mechanisms. Direct addition to the main mixing container can easily lead to clumping and uneven dispersion, affecting efficacy. Regarding system cleaning and contamination prevention, most equipment lacks independent, targeted cleaning loops. When switching between different types of pesticides, residual pesticides can easily cause cross-contamination, affecting not only the purity of subsequent solutions but also potentially generating unknown harmful substances, posing safety risks. Existing solutions generally neglect data traceability in the dosing process; key information such as operating parameters, dosage, and time cannot be recorded and remotely managed, making it difficult to monitor application quality and trace problems. Finally, the equipment suffers from poor physical adaptability, unable to flexibly connect to application equipment of different heights, increasing operational complexity.

[0004] Therefore, developing an agricultural pesticide dispensing system and control method that can achieve automated and precise proportioning, is widely adaptable to different forms of pesticides, has the ability to thoroughly prevent cross-contamination and clean (one-step cleaning), and enables full-process data traceability has become an urgent technical need to improve the standardization and intelligence of modern agricultural operations. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, this invention provides a multi-branch cleaning loop and control method based on an agricultural pesticide dispensing system. The objective of this invention can be achieved through the following technical solution: A multi-branch cleaning loop and control method based on an agricultural pesticide dispensing system, characterized in that it includes: S1: Obtain relevant parameters for pesticide application, and generate a set of key parameters for pesticide application by combining crop type, pest and disease severity, application area and ambient temperature and humidity; initiate the targeted pre-cleaning process to perform differentiated cleaning operations on the agricultural pesticide application system, and dynamically adjust the cleaning pressure and duration. S2: A multimodal agent pretreatment strategy is preset, which performs homogenization stirring on liquid agents and a secondary dilution process of base water premixing-high-speed dispersion on solid powder agents; through metering and stirring linkage control, the stirring parameters are dynamically adjusted in combination with real-time collected agent state data, and the homogenization of the mixed agents is verified to form a homogenized and qualified agent solution; S3: Construct a multi-branch independent control cleaning loop, pressurize the cleaning medium and distribute it to the dedicated cleaning branch of the functional area, perform graded and directional cleaning of the agricultural pesticide application system, and simultaneously feed back the real-time status through the cleaning effect monitoring mechanism to generate cleaning effect monitoring data records. S4: Initiate the system component linkage reset program, and perform linkage reset on the actuator, valve and control unit based on the preset reset logic; acquire relevant data of the entire process of drug preparation and pre-cleaning, and adopt a dual-mode data management scheme of local encrypted storage and remote cloud backup to classify and encrypt the relevant data of the entire process and upload it to the cloud platform simultaneously.

[0006] As a preferred embodiment of the present invention, the targeted pre-cleaning process specifically includes: Pre-cleaning is performed on the storage areas, pre-treatment areas and corresponding flow channels related to pesticide dispensing in the agricultural pesticide dispensing system. A fixed amount of clean water is injected into the cleaning circuit according to a preset ratio, and the high-pressure cleaning pump pressurizes the water to form a flushing water flow to directionally rinse the residual pesticide solution. The flushed mixture is introduced into the mixing metering machine through a dedicated guide pipe to measure the total amount of the mixture and the equivalent concentration of the residual pesticide solution in real time. The residual pesticide solution volume is generated and transmitted to the system control unit simultaneously to complete the targeted pre-cleaning process.

[0007] Specifically, the method for dynamically adjusting the cleaning pressure and duration is as follows: Based on the drug type and residual drug volume in the key parameters of the drug preparation, and combined with the preset cleaning parameter mapping relationship, the corresponding initial cleaning pressure value and initial cleaning duration value are obtained; the control unit outputs based on the initial cleaning pressure value and executes the cleaning operation for the initial cleaning duration value in real time; sensor data characterizing the cleaning effect are collected in real time, and the cleaning pressure value and cleaning duration value are corrected in real time based on the comparison result of the sensor data and the preset threshold.

[0008] Specifically, the multimodal drug pretreatment strategy includes: Based on the appropriate pretreatment operations for liquid and solid powder agents, for liquid agents, continuous homogenization stirring is performed at a preset fixed speed; for solid powder agents, a preset amount of base water is added to a dedicated secondary dilution treatment area, and solid powder is quantitatively added to perform a secondary dilution process of base water premixing and high-speed dispersion, so as to form a homogeneous agent.

[0009] Specifically, the method of controlling the flow through a combination of metering and stirring is as follows: The system employs both flow and weight detection to simultaneously collect drug delivery data. By switching between individual and mixed metering modes, it calculates and controls the drug dosage based on preset multiplier parameters. Simultaneously, it starts the stirring device to perform preliminary mixing of the drug. The mixing amount of the drug is calibrated by weight detection, and the stirring parameters are dynamically adjusted based on the calibration data to achieve real-time linkage control between metering and stirring.

[0010] Specifically, the method for homogenizing and validating the mixed pharmaceutical agent is as follows: Collect test samples of the mixed reagents, conduct concentration distribution and particle dispersion tests on the test samples, obtain test data after sample testing, compare the test data with the preset homogenization threshold one by one, and generate corresponding homogenization verification results and test data records.

[0011] Specifically, the method for constructing the multi-branch independent control cleaning loop is as follows: A main cleaning pipeline is pre-set, and a high-pressure cleaning pump is added to the main pipeline. Based on the functional areas of the agricultural pesticide dispensing system, dedicated cleaning branches for each functional area are set off from the main pipeline. The electric control valves and high-pressure cleaning pumps of each branch are electrically connected to the system control unit to form a closed-loop cleaning circuit that can be independently controlled by each branch. The functional areas of the agricultural pesticide dispensing system include pesticide storage, pretreatment, mixing and metering, and main mixing.

[0012] Specifically, the hierarchical and targeted cleaning is performed using the following method: A pre-defined tiered cleaning strategy is implemented, consisting of container-level, pipeline-level, and interface-level cleaning. Container-level cleaning involves opening the corresponding electric control valve on the cleaning branch of the container, pressurizing the cleaning medium via a high-pressure cleaning pump, and performing high-pressure spray cleaning on the inner walls of each functional area. Pipeline-level cleaning involves opening the electric control valve corresponding to the branch guide pipe, circulating the high-pressure cleaning medium within the dedicated guide pipe for each functional area. Interface-level cleaning involves opening the dedicated cleaning nozzle at the interface, spraying and rinsing the connecting interfaces of each guide pipe and the inlet / outlet flanges of the container, performing the cleaning operation step by step.

[0013] Specifically, the method for feeding back real-time status through the cleaning effect monitoring mechanism is as follows: A multi-dimensional detection component is preset at the discharge port of the cleaning waste liquid to obtain real-time detection data of the cleaning waste liquid. The real-time detection data is analyzed in real time and the cleaning status is fed back synchronously. The real-time detection data is compared with the preset cleaning threshold item by item to generate cleaning effect monitoring data records.

[0014] Specifically, the method for initiating the system component linkage reset procedure is as follows: The system control unit triggers a linkage reset procedure to perform a shutdown and return operation on the actuator, and a reset and closure operation on the valves of each pipeline and container, adjusting all valves to the normally closed initial state. Then, the drug dispensing and cleaning operation parameters and process cache data of the control unit are reset. After the reset, the status of the actuator, valves and control unit are inspected, and a reset status record is generated.

[0015] Specifically, the method for obtaining relevant data for the entire drug preparation and pre-cleaning process is as follows: A multi-node data acquisition link is built based on the system control unit to collect multi-dimensional operation data of the entire process in real time. The multi-dimensional operation data of the entire process is preprocessed to be formatted and regularized. Real-time bidirectional communication between the multi-node data acquisition link and the control unit is executed to generate integrated structured drug dispensing and pre-cleaning process related data. The multi-dimensional operation data of the entire process includes process operation parameters, equipment operation status data, detection and verification data and cleaning effect monitoring data.

[0016] Specifically, the method for classifying and encrypting the data related to the entire process is as follows: Based on the generation scenario and actual use, the relevant data of the entire process is classified; encryption algorithms are used for encryption processing, and the classified data is allocated to an independent local encrypted storage directory to generate encrypted data files; a dual-mode data management method of local storage and remote transmission is adopted, in which the encrypted data files are stored locally according to the corresponding storage directory, and the encrypted data is synchronously transmitted to the remote data platform through the transmission module; the integrity verification operation is performed on each encrypted data file simultaneously to generate data classification encrypted storage records.

[0017] The beneficial effects of this invention are as follows: (1) By setting up a multi-branch independent control cleaning loop and a hierarchical cleaning strategy at the container level, pipeline level, and interface level, combined with targeted pre-cleaning and parameter adaptive mechanisms, the efficient cleaning of the drug preparation system is achieved, fundamentally eliminating cross-contamination. Specifically, the multi-branch loop ensures that the cleaning medium can be independently and accurately delivered to various functional areas such as drug storage, pretreatment, mixing and metering, and main mixing, achieving directional flushing of specific containers; the hierarchical cleaning strategy systematically covers cleaning blind spots of different levels and structures such as the inner wall of the container, internal guide pipes, and external interfaces, ensuring no dead corners remain. Furthermore, in terms of cleaning control logic, by acquiring physical property parameters such as drug viscosity and concentration, and dynamically matching cleaning pressure and duration accordingly, the cleaning operation is both targeted and efficient; at the same time, the cleaning effect is monitored in real time by sensors during the cleaning process, and the cleaning parameters are adjusted accordingly, forming a closed-loop intelligent cleaning process of "evaluation-execution-monitoring-optimization". This integrated solution ensures the purity and efficacy of each dispensing when switching between different agents, solving the long-standing technical problem of cross-contamination in agricultural pesticide dispensing equipment.

[0018] (2) By setting up a precision dispensing module with integrated metering and stirring linkage control, a secondary dilution pretreatment module for solid agents, and a data acquisition, management, and cloud transmission module covering the entire process, an intelligent, high-precision, and fully traceable dispensing operation system was constructed. Among them, the metering and stirring linkage control module improved the reliability and consistency of the application effect through dual-core of flow and weight sensors and precise control of electric valves based on preset dilution parameters. The secondary dilution module for solid powders effectively prevented clumping and uneven dispersion through a special process of "base water premixing - high-speed dispersion", expanding the equipment's adaptability to different dosage forms of agents. The full-process data management module automatically collects and records all key data from parameter setting, agent addition, mixing and stirring to multiple cleanings, and forms an unalterable electronic operation archive through a combination of local encrypted storage and remote cloud backup. This not only provides a reliable data foundation for traceability of application quality and supervision of standardized application, but also provides the possibility of optimizing dispensing schemes and predictive maintenance of equipment by analyzing historical data, realizing the leap from a single operating device to an intelligent agricultural management node. Attached Figure Description

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic flowchart of a multi-branch cleaning loop and control method based on an agricultural pesticide dispensing system according to the present invention. Figure 2 This is a schematic diagram showing the composition and functional modules of the agricultural pesticide dispensing system in this invention; Figure 3 This is an architecture diagram of a multi-branch cleaning loop and control method based on an agricultural pesticide dispensing system according to the present invention. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0022] like Figure 2 As shown, Figure 2 This diagram illustrates the composition and functional modules of an agricultural pesticide dispensing system. It comprehensively presents the entire process from pesticide storage, pretreatment, metering and mixing to pesticide output, along with the interconnections between the functional modules. It also integrates a cleaning auxiliary system. The labeled components are arranged according to the principle of "functional zoning + process linkage," forming a closed-loop operation system. This intuitively reflects the system's core design logic of "multi-modal adaptation, precise control, and efficient linkage." The following is a detailed explanation of each labeled component in the diagram: I. Water source and cleaning-related components Rinsing tap water: The core supply source of the system's cleaning media, connected to the cleaning circuit through a dedicated pipeline, provides clean water for the targeted pre-cleaning and graded directional cleaning of the entire system, ensuring that there is no secondary pollution during the cleaning process.

[0023] Tap water: The base water supply source for the drug preparation process. On the one hand, it provides base water for the secondary dilution of solid powders, and on the other hand, it replenishes the required water volume for the drug mixing process. It is connected to components such as powder dilution tanks and liquid preparation tanks through pipelines.

[0024] Cleaning valve: A key control component of the cleaning circuit, used in conjunction with the high-pressure cleaning pump and branch diversion pipe to control the on / off state and flow rate of the cleaning medium. It can be opened individually or in combination according to cleaning requirements (such as container-level, pipeline-level, and interface-level cleaning) to achieve differentiated cleaning operations.

[0025] II. Pharmaceutical Storage and Pretreatment Components Group A, Group B, and Group C are three parallel liquid agent storage and stirring units. Each group is an independent sealed tank (500mL capacity per tank), equipped with a built-in micro-stirring device (motor + stirring paddle) and an outlet electric needle valve. They are mainly used to store different types of liquid agents such as emulsifiable concentrates, aqueous solutions, and suspensions. Continuous stirring ensures that the liquid agents are homogeneous and do not separate, meeting the requirements for individual storage and simultaneous addition of multi-component liquid agents.

[0026] D-Group: A solid powder pretreatment unit used in conjunction with a powder dilution tank. It includes an independent stirring device, a quantitative feeding structure, and a base water filling interface. It is specifically designed for the storage and preliminary treatment of solid agents such as wettable powders and water-dispersible granules, providing a stable working medium for the secondary dilution process.

[0027] Powder dilution tank: The core component for secondary dilution of solid powders, with a volume of 2500mL. It is equipped with a dual-speed stirring motor, a level gauge and a material prevention valve. Through the process of "base water injection - quantitative feeding - high-speed dispersion - low-speed heat preservation", it solves the problem of easy agglomeration of solid powders when directly mixed, and forms a dispersed and homogeneous pretreated solution.

[0028] Hopper: An auxiliary component for feeding solid powder, located above the powder dilution tank. It has a built-in quantitative weighing module (accuracy ±0.01kg) to accurately control the amount of solid powder added, avoiding measurement errors caused by manual feeding. After feeding is completed, the channel is closed by the anti-material valve to prevent dust leakage or liquid backflow.

[0029] Material control valve: A one-way control valve installed between the hopper and the powder dilution tank. It has both sealing and anti-backflow functions. It is opened when feeding to allow the powder to fall and closed during the pretreatment process to ensure stable pressure and uniform concentration of the agent in the tank and prevent the base water or liquid from overflowing upwards.

[0030] III. Metering and Mixing Components Electric needle valve: A precision control valve installed at the outlets of AC material group, D material group and each guide pipe. It is electrically connected to the PLC control unit and can accurately adjust the valve opening according to the preset liquid ratio parameter to control the flow rate and total amount of the agent or liquid. It is the core actuator to realize the dual mode of "individual metering and mixed metering".

[0031] Manual valve: The auxiliary control valve of the system, mainly used for flow regulation, pipeline switching or emergency shutdown in non-automated scenarios. It forms a dual control with the electric needle valve to improve the flexibility and safety of system operation.

[0032] Mixing and metering machine: An integrated component for metering and preliminary mixing, with a volume of 2500L. It has a built-in high-precision flow sensor, weighing module and stirring device. It collects and delivers data synchronously through flow and weight dual detection, accurately calibrates the amount of medicine mixed, and at the same time starts the built-in stirring device to achieve preliminary homogenization and mixing of multi-component medicines, reducing the pressure on the subsequent main tank mixing. It is a key component to ensure the accuracy of medicine dispensing (error ≤ ±1%).

[0033] Mixing tank (200L): The main mixing tank of the system, with a vertical cylindrical structure, serves as the core carrier for the final homogeneous mixing of multi-component drugs. It has a built-in impeller agitator (including forward and reverse rotation control module) and supports a "30-second forward rotation + 30-second reverse rotation" cyclic stirring mode to avoid drug stratification and sedimentation, and ensure mixing uniformity ≥99%. The tank is equipped with a level gauge for real-time monitoring of the total amount of drug. The maximum total amount of drug to be mixed in a single batch is 200L. If the amount exceeds 200L, multiple batches are required.

[0034] Level gauges: These are detection components installed on key containers such as powder dilution tanks, mixing and metering machines, and dispensing tanks. By collecting level data in real time and feeding it back to the PLC control unit, they enable precise monitoring of the amount of base water added, the amount of reagent added, and the total amount of reagent, thus avoiding dispensing errors caused by over- or under-dosing.

[0035] The mixing device includes mixing mechanisms for each functional unit, including a liquid mixing motor for the AC material group (300 r / min), a dual-speed mixing motor for the powder dilution tank (500 r / min high speed, 100 r / min low speed), a preliminary mixing device for the mixing metering machine (400 r / min), and an impeller agitator for the liquid preparation tank (600 r / min). Each mixing device is linked to the PLC control unit, and the speed and duration are adjusted according to the needs of different process stages to ensure homogenization of the reagents.

[0036] IV. Output Components Liquid output pump: A power transmission component installed at the bottom outlet of the liquid preparation tank, connected to the outlet flange of the liquid preparation tank. It is triggered and started by the PLC control unit to provide stable power for the prepared qualified liquid, and deliver the liquid to the application equipment (sprayer, irrigation pipeline, etc.) at a preset flow rate (e.g., 10L / min). It ensures that there is no leakage or residue in the output process and is compatible with the docking requirements of application equipment of different heights.

[0037] Please see Figure 1-3 A multi-branch cleaning loop and control method based on an agricultural pesticide dispensing system, characterized in that it includes: S1: Obtain relevant parameters for pesticide application, and generate a set of key parameters for pesticide application by combining crop type, pest and disease severity, application area and ambient temperature and humidity; initiate the targeted pre-cleaning process to perform differentiated cleaning operations on the agricultural pesticide application system, and dynamically adjust the cleaning pressure and duration. S2: A multimodal agent pretreatment strategy is preset, which performs homogenization stirring on liquid agents and a secondary dilution process of base water premixing-high-speed dispersion on solid powder agents; through metering and stirring linkage control, the stirring parameters are dynamically adjusted in combination with real-time collected agent state data, and the homogenization of the mixed agents is verified to form a homogenized and qualified agent solution; S3: Construct a multi-branch independent control cleaning loop, pressurize the cleaning medium and distribute it to the dedicated cleaning branch of the functional area, perform graded and directional cleaning of the agricultural pesticide application system, and simultaneously feed back the real-time status through the cleaning effect monitoring mechanism to generate cleaning effect monitoring data records. S4: Initiate the system component linkage reset program, and perform linkage reset on the actuator, valve and control unit based on the preset reset logic; acquire relevant data of the entire process of drug preparation and pre-cleaning, and adopt a dual-mode data management scheme of local encrypted storage and remote cloud backup to classify and encrypt the relevant data of the entire process and upload it to the cloud platform simultaneously.

[0038] Specifically, the targeted pre-cleaning process includes: The system performs a pre-cleaning operation on the storage areas, pre-treatment areas, and corresponding flow channels related to pesticide dispensing within the agricultural pesticide dispensing system. A fixed amount of clean water is injected into the cleaning circuit according to a preset ratio, and the high-pressure cleaning pump pressurizes the water to form a flushing water flow, which directionally washes away the residual pesticide solution. The flushed mixture (clean water + residual pesticide solution) is introduced into a mixing metering machine through a dedicated guide pipe. The mixing metering machine measures the total amount of the mixture in real time and generates a residual pesticide solution quantity, which is synchronously transmitted to the system control unit to complete the targeted pre-cleaning process.

[0039] In this embodiment, the PLC control unit triggers a targeted pre-cleaning command. Figure 2 Tap water is used as the cleaning medium source and is connected to a high-pressure cleaning pump (integrated into the cleaning circuit) through the main pipeline. The following is an example of its operation. The control unit injects a predetermined amount of clean water (V) according to a preset standard. 清 =5L (based on system pipeline volume and common residual amount settings), start the high-pressure cleaning pump to pressurize the clean water to the initial pressure value P0=0.25MPa, open the cleaning valves of material group A, powder dilution tank, mixing metering machine and corresponding guide pipe, and the high-pressure water flow will directionally flush the residual liquid in each area.

[0040] After rinsing, the mixture (clean water + residual medicine) is introduced into a mixing and metering machine through a dedicated guide tube. The mixing and metering machine's built-in flow sensor and weighing module collect data synchronously to accurately measure the total volume V of the mixture. 混 =5.3L. The PLC control unit is based on the formula V 残 =V 混 -V 清 =5.3L - 5L = 0.3L The residual drug volume V is automatically calculated. 残 =0.3L, and the data is transmitted to the control unit in real time.

[0041] The control unit will V 残 With preset measurement threshold (example preset V) 残 Comparison (≤0.5L): If V 残If the volume is ≤0.5L, the pre-cleaning is deemed satisfactory; close all cleaning valves. If V 残 If the volume is greater than 0.5L, it indicates that the residual solution has not been completely flushed out. The cleaning pressure will be automatically increased to P1=0.3MPa, and the cleaning time t will be extended. 延 =2min, measure V again 混 And calculate V 残 until V 残 ≤0.5L, the calculated residual liquid volume is used to dynamically adjust the cleaning pressure and duration.

[0042] Specifically, the method for dynamically adjusting the cleaning pressure and duration is as follows: Based on the drug type, preset clean water injection volume, and residual drug volume in the key parameters set for drug preparation, and combined with the preset cleaning parameter mapping relationship, the corresponding initial cleaning pressure and initial cleaning duration values ​​are obtained. The control unit, based on the initial parameter output, starts the high-pressure cleaning pump to perform a pre-cleaning operation. During the cleaning operation, two types of core sensor data are collected in real time: one is the real-time data of the total volume of the mixed liquid fed back by the mixing meter (used to estimate the residual drug volume), and the other is the pressure feedback data of the cleaning circuit. Based on the comparison results of these two types of real-time data with preset thresholds (residual drug volume threshold and pressure stability threshold), the cleaning pressure and cleaning duration values ​​are corrected in real time—if the real-time residual drug volume decrease rate is lower than the preset value, the cleaning pressure is automatically increased; if the pressure fluctuation in the cleaning circuit exceeds the stability threshold, the pressure is appropriately reduced and the corresponding duration is extended; until the real-time residual drug volume drops to the preset threshold, the cleaning operation is stopped, ensuring the cleaning effect and operational stability. Specifically, the multimodal drug pretreatment strategy includes: Based on the appropriate pretreatment operations for liquid and solid powder reagents, for liquid reagents, the stirring device in its dedicated storage and stirring area is activated to continuously homogenize and stir the liquid reagent at a preset fixed speed. The stirring device is kept running continuously during the reagent storage and pretreatment stages to ensure that the reagent is always in a homogeneous state and to avoid stratification, until the reagent is transported to the next process. For solid powder reagents, a preset amount of base water is first added to its dedicated secondary dilution treatment area, and then a quantitative amount of solid powder is added. The high-speed stirring device is activated to carry out a secondary dilution process of base water premixing and high-speed dispersion. After the high-speed stirring is set for a preset time, it is switched to low-speed stirring to prevent powder particles from settling and agglomerating. The stirring state is maintained throughout the pretreatment process until the solid powder is completely dispersed. After the pretreatment is completed, the low-speed stirring is maintained until the reagent is transported, forming a dispersed and homogeneous reagent.

[0043] In this embodiment, the actual application scenario is the control of apple leaf spot disease in a hilly apple orchard in northern China. A 400L mixed solution needs to be prepared (containing 43% liquid tebuconazole suspension and 70% solid powder mancozeb wettable powder). Figure 2 The complete hardware architecture enables the implementation of multimodal drug pretreatment strategies, allowing for differentiated and precise pretreatment of liquid and solid drugs. I. Preparations and Parameter Setting Before Implementation The system is started via HMI (Human-Machine Interface). The operator inputs key parameters for drug preparation: total target drug volume 400L (since the maximum capacity of the preparation tank is 200L, the same preparation operation is performed twice to complete the 400L target drug volume); for liquid 43% tebuconazole suspension, the dilution ratio is 1500 (requiring 266.7mL of drug); pretreatment stirring speed is 300r / min; for solid powder 70% mancozeb wettable powder, the dilution ratio is 800 (requiring 500g of drug); base water volume is 8L; high-speed stirring speed is 600r / min for 10 minutes; low-speed stirring speed is 150r / min. The PLC control unit (model: S7-200) receives the parameters and automatically associates them. Figure 2 The control logic of each hardware component completes the initial configuration of the preprocessing process.

[0044] Figure 2 The core hardware components in this embodiment include: a liquid drug storage and stirring unit (Group A), a solid powder secondary dilution unit (powder dilution tank + Group D), a mixing and metering machine, a dispensing tank (200L×2, for two dispensing cycles), and auxiliary components such as flushing tap water, a cleaning valve, an electric needle valve, a hopper, a material prevention valve, a level gauge, and a stirring device. All hardware components are connected in series through a guide pipe and linked by a circuit to form a pretreatment closed loop.

[0045] II. Targeted pre-cleaning (pre-treatment operation) The PLC control unit triggers a targeted pre-cleaning command. Figure 2 The system uses tap water as the cleaning medium, connected to a high-pressure cleaning pump (not separately labeled, integrated into the cleaning circuit) via the main pipeline. Based on the residual characteristics of the chemicals, this pre-cleaning process performs a "medium-level" cleaning on the A-material group, powder dilution tank, mixing metering machine, and corresponding guide pipes (tebuconazole suspension has medium viscosity, mancozeb has moderate solubility). The control unit opens the cleaning valves in the corresponding areas, adjusts the cleaning pressure to 0.3 MPa, and the cleaning time is 5 minutes. The high-pressure cleaning medium sprays and rinses the A-material group tank, the inner wall of the powder dilution tank, the guide pipe lines, and interfaces through dedicated branch guide pipes and built-in nozzles in each area. After pre-cleaning, the level gauge detects no residual water, and the PLC control unit sends a "cleaning qualified" signal, entering the chemical pretreatment stage.

[0046] III. Pretreatment of liquid agents (based on...) Figure 2 (Part A material group and supporting hardware) Operators through Figure 243% tebuconazole suspension is injected into the inlet of the A-group feed. After the sealing cap is closed, the pretreatment start command is triggered. The PLC control unit simultaneously closes the electric needle valve at the outlet of the A-group feed and starts the in-tank agitator (motor power 1.5kW), continuously homogenizing and agitating at a preset fixed speed of 300r / min. During the agitation process, the level gauge on the outside of the A-group tank collects the liquid level data of the agent in real time and feeds it back to the PLC control unit to ensure that the agent is always in a homogeneous state and to avoid the suspended agent from stratifying and settling. Figure 2 The real-time monitoring module (integrated into the PLC) synchronously collects stirring speed data. If speed fluctuations occur, the control unit immediately adjusts the motor output power to maintain stable stirring. Throughout the storage and pretreatment stages, the stirring device continues to run until the PLC issues a metering and delivery command, ensuring that the homogenized state of the liquid reagent is maintained throughout the mixing process.

[0047] IV. Pretreatment of solid powder drugs (based on...) Figure 2 Powder dilution tank + D material assembly and supporting hardware) Base water injection: PLC control unit activated Figure 2 The electric valve at the tap water interface adds a preset amount of 8L of base water to the powder dilution tank. After the level gauge detects that the base water level meets the standard, it sends a signal to the control unit, and the valve automatically closes.

[0048] Quantitative feeding: Operators use... Figure 2 The hopper in the middle adds 70% mancozeb wettable powder into the powder dilution tank. The anti-material valve below the hopper opens simultaneously. After the feeding is completed, the anti-material valve closes automatically to prevent dust leakage and backflow of base water.

[0049] Secondary dilution and stirring: The PLC control unit activates the stirring device (dual-speed motor, 3kW) inside the powder dilution tank, initially executing a base water premixing-high-speed dispersion process at a high speed of 600r / min. The high-speed rotation of the stirring paddle breaks up powder clumps, ensuring thorough mixing of the reagent and base water. After 10 minutes of high-speed stirring, the control unit automatically switches to a low-speed stirring of 150r / min to prevent powder particle sedimentation, maintaining stirring throughout the pretreatment process. A level gauge monitors the state of the mixture in the tank in real time, and the PLC control unit calibrates the reagent dispersion uniformity using a weight sensor (integrated at the bottom of the powder dilution tank) until the pretreatment standard of "no visible clumps, uniform suspension" is met. Low-speed stirring is maintained until metering and delivery.

[0050] V. Metering and delivery connection of pretreated reagents After the liquid reagent pretreatment is completed, the PLC control unit opens the electric needle valve at the outlet of material group A, and the reagent flows into the mixing and metering machine through the guide pipe. Figure 2The flow sensor of the mixing meter collects the delivery data in real time to ensure that the agent is accurately delivered to 266.7mL and then the valve is closed. After the solid powder is pretreated, the electric needle valve at the outlet of the powder dilution tank is opened and 8.5L of diluted drug solution flows into the mixing meter. The weight sensor calibrates the total delivery volume. After the metering is completed, it is initially mixed with the liquid agent and then jointly delivered to the dispensing tank for final homogenization.

[0051] This embodiment is illustrated by... Figure 2 The coordinated operation of various hardware components enables differentiated and precise pretreatment of liquid and solid reagents. Liquid reagents are homogenized without stratification, and solid powders are free from clumping and uniformly dispersed. This lays the foundation for subsequent metering and stirring linkage control and homogenization verification, fully demonstrating the system's technical advantages of "multi-modal adaptation and precise control".

[0052] Specifically, the method of controlling the flow through a combination of metering and stirring is as follows: First, the precise required amounts of reagent and water are calculated based on preset liquid ratio parameters. Then, the electric valve for guiding the pretreated reagent is opened. The reagent delivery data is collected simultaneously using both flow and weight detection methods. It supports switching between individual metering and mixed metering modes. In individual metering, the reagent is delivered in a single channel and the amount is precisely controlled according to the required amount. In mixed metering, multiple guiding valves are opened sequentially and the amount is controlled according to the required amount for each channel. When the preset delivery amount is reached, the corresponding guiding valve is closed, and the built-in stirring device in the mixed metering area is started simultaneously for preliminary mixing. During the stirring process, the amount of reagent mixed is continuously calibrated by weight detection. The stirring speed and stirring time are dynamically fine-tuned based on the calibration data to achieve real-time linkage control between metering data and stirring operation.

[0053] This embodiment uses the control of corn borers in field crops (maize) as the application scenario, and requires the formulation of V... 总 =500L mixed solution (containing 20% ​​chlorantraniliprole liquid suspension and 40% thiamethoxam water-dispersible granules solid powder), based on Figure 2 Implement the core process of "dual detection and metering + dual mode switching + real-time stirring linkage": I. Core Parameters and Hardware Adaptation (Incorporating Universal Dilute Formula) 1. Parameter settings and general formula application (the following parameters are all preset examples) Key parameters are preset and entered through the HMI: Target total volume of drug solution V 总=500L (Since the maximum capacity of the mixing tank is 200L, the target pesticide solution is prepared three times in the same way to complete the total amount of 500L of target pesticide solution). The recommended dosage of liquid pesticide (20% chlorantraniliprole suspension) is 10mL / mu, and the conventional application water volume is 30L / mu; the recommended dosage of solid powder (40% thiamethoxam water-dispersible granules) is 8g / mu, and the conventional application water volume is 30L / mu; the application area is 10 mu, and the pest and disease level is moderate (adjust the dosage by 10% according to the formula adjustment principle).

[0054] The PLC control unit automatically calculates the required dosage based on the general pesticide dilution formula provided by the customer. The formula is applied as follows: Formula 1 (Basic Dilution Conversion Formula): Calculate the target dilution ratio for the two pesticides: Liquid pesticide dilution ratio K1 = Conventional application water volume per mu (L) × 1000 ÷ Pesticide application volume per mu (mL) = 30L × 1000 ÷ 10mL = 3000 times; Solid powder dilution ratio K2 = Conventional application water volume per mu (L) × 1000 ÷ Pesticide application volume per mu (g) ​​= 30L × 1000 ÷ 8g = 3750 times. Due to moderate pest and disease occurrence, the dosage is increased by 10% according to the adjustment principle, and the final corrected dilution ratios are: K1' = 3000 ÷ 1.1 ≈ 2727 times, K2' = 3750 ÷ 1.1 ≈ 3409 times.

[0055] Formula 2 (Actual Dosage Formula): Calculate the required dosage of 500L of liquid solution. Liquid dosage V1 = Target water volume (L) × 1000 ÷ Final dilution ratio = 500L × 1000 ÷ 2727 ≈ 183.4mL; Solid powder dosage m1 = Target water volume (L) × 1000 ÷ Final dilution ratio = 500L × 1000 ÷ 3409 ≈ 146.7g; Solid pretreatment base water dosage V... 基 =20×m1=20×146.7g=2934mL≈2.93L (preset powder to base water ratio 1:20).

[0056] Formula 3 (Reverse Calculation Formula): Verifying the rationality of the dilution ratio. Calculated dosage per mu for liquid agents = conventional application water volume per mu (L) × 1000 ÷ final dilution ratio = 30L × 1000 ÷ 2727 ≈ 11mL / mu, which is within the 10% upward range of the recommended dosage per mu (10mL / mu); Calculated dosage per mu for solid powders = 30L × 1000 ÷ 3409 ≈ 8.8g / mu, which is within the 10% upward range of the recommended dosage per mu (8g / mu).

[0057] 2. Figure 2 Core hardware and parameters Mixing and metering machine: built-in flow sensor (sampling frequency 10 times / s), weighing module (accuracy ±0.01kg), variable frequency stirring device (speed range 50-500r / min, preset initial stirring speed 400r / min); Electric needle valves: 1 unit each for the A group (liquid) and D group (solid pretreatment liquid) outlets, linked to PLC signals, supporting stepless adjustment of opening degree from 0-100%; Level gauge: Installed on mixing and metering machines and dispensing tanks, it provides real-time feedback of liquid level data (accuracy ±1L) and assists in metering calibration; Mixing tank stirring device: supports "30 seconds clockwise rotation + 30 seconds counterclockwise rotation" mode, with a preset speed of 600 r / min.

[0058] II. Core Process of Metering and Stirring Integration 1. Separate metering (liquid reagent) and stirring start-up Metering start: The PLC calculates V1 = 183.4 mL based on Formula 2 and sends a command to start the metering process. Figure 2 The electric needle valve at the outlet of material group A is initially opened to 50%, allowing liquid reagent to be delivered to the mixing and metering machine. Simultaneously, the flow sensor and weighing module are activated, and the dual detection data are transmitted synchronously to the PLC (the flow sensor collects instantaneous flow rate, and the weighing module collects changes in the weight of the material inside the mixing and metering machine).

[0059] 0.9×V1 deceleration threshold control: When the cumulative volume of the flow sensor reaches 0.9×183.4mL≈165.1mL, the PLC will reduce the opening of the electric needle valve to 10% (to compensate for fluid inertia and valve response delay); when the cumulative flow detected by the flow sensor reaches 183.4±0.1mL, and the weight detected by the weighing module reaches 183.4g±0.05g (liquid agent density≈1g / mL), the PLC will immediately close the electric needle valve of material group A to complete the individual metering of liquid agent.

[0060] Stirring linkage trigger: When the valve is closed, the PLC triggers the built-in stirring device of the mixing meter to start, and initially stirs at the preset initial parameter of 400r / min for 2 minutes to ensure uniform distribution of the agent.

[0061] 2. Separate metering (solid pretreatment solution) and fine-tuning of stirring parameters Pretreatment solution preparation: Based on formula 2, the D-group has m1 = 146.7g and V... 基 =2.93L, complete the second dilution (2.93L base water + 146.7g thiamethoxam water-dispersible granules), stir at high speed of 500r / min for 5min, and then stir at low speed of 100r / min to ensure that the powder does not clump.

[0062] Metering Start-up and Calibration: The PLC activates the electric needle valve at the outlet of material group D, initially opening to 60%, allowing the pretreatment solution to be fed into the mixing metering machine. When the cumulative flow from the flow sensor reaches 0.9 × (2930 mL + 146.7 mL) ≈ 2769 mL, the valve opening is adjusted to 15%. When the cumulative flow from the flow sensor reaches 3076.7 ± 0.2 mL, and the total weight of the weighing module reaches 183.4 g + (2930 g + 146.7 g) ± 0.1 kg, the PLC closes the electric needle valve of material group D, completing the separate metering of the solid pretreatment solution.

[0063] Dynamic adjustment of stirring parameters: The PLC compares the actual total weight with the theoretical total weight. If the deviation exceeds ±0.1kg, the stirring speed is increased to 450r / min and the stirring time is extended by 1min to ensure the fusion of the two agents.

[0064] 3. Hybrid Measurement Validation and Formula Reverse Verification Dual detection data verification: The PLC cross-verifies the flow rate and weight data, with a deviation of ≤±0.1%. At the same time, it verifies again using Formula 3 (reverse calculation formula): the dosage of liquid agent per mu = 30L×1000÷2727≈11mL / mu, and the dosage of solid powder per mu = 30L×1000÷3409≈8.8g / mu. Both are within the 10% upper limit of the preset range (10mL / mu for liquid and 8g / mu for solid), confirming that the measurement is compliant.

[0065] Mixing tank linkage stirring: After the mixed agent is delivered to the mixing tank, the PLC controls the addition of tap water to 500L, and starts the mixing tank's "30 seconds clockwise + 30 seconds counterclockwise" stirring mode (600r / min) for 15 minutes to ensure that the drug solution is homogenized to meet the standards.

[0066] III. Implementation Results and Formula Application Instructions This embodiment incorporates a general formula for pesticide dilution, clarifying the calculation logic for the pesticide dilution ratio and the actual dosage. Simultaneously, a reverse calculation formula verifies dosage compliance, preventing concentration over- or under-concentration. Implementation results show that the dosage error is ≤±1%, and the mixing uniformity is ≥99%, meeting the requirements for precise pesticide preparation. The application of the formula makes the technical solution more aligned with agricultural pesticide preparation industry standards. Those skilled in the art can directly reproduce the preparation process based on the formula, enhancing the sufficiency and practicality of the patent disclosure.

[0067] Key points for formula application: Strictly adhere to the unified unit requirements: water consumption is expressed in liters (L), and pesticide dosage is expressed in milliliters (mL) / grams (g) to avoid concentration deviations; Since the dilution ratios K1'=2727 times and K2'=3409 times are both greater than 100 times, the external ratio method is used for calculation, which meets the requirements for formula use; When mixing pesticides, the dosage of each pesticide is calculated according to its respective dilution ratio, and the total amount is not substituted into the formula to avoid the risk of pesticide damage.

[0068] Specifically, the method for homogenizing and validating the mixed pharmaceutical agent is as follows: Multiple test samples are extracted from the mixed reagent. Concentration uniformity and particle dispersion are tested on each of the multiple test samples. The test data of all samples are collected and integrated. The integrated test data is compared with the preset homogenization threshold one by one. If the test data all meet the threshold requirements, the homogenization verification is completed and a homogenization verification qualified result and corresponding test data record are generated. If the test data does not meet the threshold requirements, the stirring device is restarted to homogenize the reagent again. After the processing is completed, the same steps are repeated to test the samples and compare the data until the test data all meet the preset threshold requirements, and the corresponding homogenization verification result and corresponding test data record are generated.

[0069] Specifically, the method for constructing the multi-branch independent control cleaning loop is as follows: A pre-set main cleaning pipeline is installed, and a high-pressure cleaning pump is added to the main pipeline. Based on the functional areas of the agricultural pesticide dispensing system, dedicated cleaning branches for each functional area are branched off from the main pipeline. Each dedicated cleaning branch for each functional area has an independent guide pipe, an electric control valve, and a cleaning nozzle. The cleaning nozzles are correspondingly arranged on the inner wall of the container, the inner side of the pipeline, and the interface of each functional area. The electric control valve and high-pressure cleaning pump of each branch are electrically connected to the system control unit to form a closed-loop cleaning circuit that can be independently controlled by each branch. The functional areas of the agricultural pesticide dispensing system include pesticide storage, pretreatment, mixing and metering, and main mixing.

[0070] Specifically, the hierarchical and targeted cleaning is performed using the following method: A pre-defined tiered cleaning strategy is implemented, starting with container-level, pipeline-level, and interface-level cleaning. First, container-level cleaning is performed by opening the electrically controlled valves of the corresponding cleaning branches for each functional unit container, activating the high-pressure cleaning pump to pressurize the cleaning medium, and using high-pressure nozzles installed inside the container to perform high-pressure spray cleaning on the inner walls of the reagent storage tank, secondary dilution tank, mixing and metering tank, and main mixing tank. After container-level cleaning is completed, the corresponding valves are closed, and pipeline-level cleaning is performed by opening the electrically controlled valves of each branch guide pipe, allowing the high-pressure cleaning medium to continuously circulate and flush within each dedicated guide pipe. After pipeline-level cleaning is completed, the corresponding valves are closed, and interface-level cleaning is performed by opening the dedicated cleaning nozzles at the joints of each guide pipe and the inlet / outlet flanges of the container, performing precise high-pressure spray cleaning on each interface area, thus completing the entire system cleaning operation step by step.

[0071] In this embodiment, the application scenario is the prevention and control of cross-contamination between different pesticide categories after application to field crops. Figure 2The hardware architecture completes the construction of multiple independent control cleaning loops and performs hierarchical and directional cleaning operations at the container level, pipeline level, and interface level. The entire process is based on functional area division and control logic, and the process parameters are represented by the symbols P (cleaning pressure) and t1 / t2 / t3 (cleaning time for each level).

[0072] I. Construction and Implementation of Multi-Branch Independent Control Cleaning Loop The cleaning circuit in this embodiment is constructed based on Figure 2 The core supply source for the rinsing water is the tap water used for cleaning. Based on the clear division of functional areas, a closed-loop cleaning circuit is constructed.

[0073] First of all, Figure 2 A high-pressure cleaning pump is installed on the main flushing water pipeline. This pump is electrically connected to the system's PLC control unit, serving as the power output component for the cleaning medium. Subsequently, based on the four functional areas of the agricultural pesticide dispensing system—pesticide storage, pretreatment, mixing and metering, and main mixing—four dedicated cleaning branches are branched off from the main cleaning pipeline. Each branch is connected to... Figure 2 The hardware in the corresponding functional areas is precisely connected: the reagent storage branch connects to the A / B / C material groups, the pretreatment branch connects to the powder dilution tank, the mixing and metering branch connects to the mixing and metering machine, and the main mixing branch connects to the liquid preparation tank.

[0074] Each dedicated cleaning branch is equipped with Figure 2 The system includes independent guide pipes, electrically controlled valves (cleaning valves), and dedicated cleaning nozzles. The cleaning nozzles are arranged according to the functional characteristics of each area: nozzles on the inner wall of the container are embedded in the top inner side of each material tank, powder dilution tank, mixing meter, and liquid preparation tank; nozzles on the inner side of the pipeline are connected in series in the middle section of each branch guide pipe; and nozzles at the interfaces are fixed at the joints of the guide pipes and on the outside of the container inlet and outlet flanges. Finally, the control terminals of the electrically controlled valves of the four branches and the high-pressure cleaning pump are all connected to a PLC control unit. The control unit enables independent opening and closing of the electrically controlled valves of each branch and coordinated start and stop of the high-pressure cleaning pump, forming a closed-loop cleaning circuit where each branch can be independently controlled and does not interfere with others.

[0075] II. Specific Implementation Process of Tiered and Targeted Cleaning After the cleaning loop is constructed, the PLC control unit performs system-wide hierarchical and directional cleaning based on the preset hierarchical cleaning logic, in the order of container level - pipeline level - interface level.

[0076] The first step is to perform container-level cleaning. The PLC control unit sends a command to simultaneously open the electric control valves of the cleaning branch corresponding to the four functional areas: reagent storage, pretreatment, mixing and metering, and main mixing. Simultaneously, the high-pressure cleaning pump is started, pressurizing the flushing tap water to the preset pressure P. Through high-pressure nozzles on the top of each container's inner side, the inner walls of the A / B / C material group tanks, powder dilution tank, mixing and metering machine, and dispensing tank are thoroughly cleaned with high-pressure spray. During spraying, the cleaning medium flows down the inner wall of the container, flushing away residual reagents. Residual reagents from the A / B / C material group tanks and powder dilution tanks are flushed into the mixing and metering machine, where a dosage is applied. The inner walls of the mixing and metering machine and dispensing tank are flushed according to a preset ratio. Since the residual amount is relatively small and does not affect subsequent overall use, it can be directly flushed into the subsequent spraying device for spraying, completing the recovery and reuse of residual reagents and avoiding waste and environmental pollution. After the cleaning time reaches the preset t1, the PLC closes the electric control valves corresponding to each container, completing the container-level cleaning.

[0077] The second step is to perform pipeline-level cleaning. The PLC control unit issues a pipeline cleaning command, opening the electrically controlled valves corresponding to the four cleaning branch guide pipes. The high-pressure cleaning pump maintains pressurization, allowing the high-pressure cleaning medium to continuously circulate and flush within the dedicated guide pipes of each functional area. During circulation, the cleaning medium forms a high-speed fluid within the guide pipes, flushing away residual chemicals from the inner walls of the pipelines and simultaneously flushing the residual solution to the mixing and metering machine. Once the preset cleaning time t2 is reached, the PLC closes the electrically controlled valves of each branch guide pipe, completing the pipeline-level cleaning.

[0078] The third step is to perform interface-level cleaning. The PLC control unit initiates the interface cleaning program, activating the dedicated cleaning nozzles at the joints of each guide pipe and the inlet / outlet flanges of the container. The high-pressure cleaning medium forms a precise high-pressure water flow through the nozzles, directionally spraying and cleaning easily contaminated areas such as interface gaps and flange seals to ensure no chemical residue remains. After the cleaning time reaches the preset t3, the PLC closes the electric control valves of all dedicated nozzles and simultaneously shuts down the high-pressure cleaning pump, completing the staged directional cleaning operation for the entire system.

[0079] This embodiment is illustrated by... Figure 2 The coordinated operation of hardware enabled the standardized construction of multi-branch cleaning loops, achieving precise execution of graded and targeted cleaning and effectively solving the problem of cross-contamination in cross-category drug dispensing.

[0080] Specifically, the method for feeding back real-time status through the cleaning effect monitoring mechanism is as follows: A detection sensor is pre-installed at the unified discharge port of the system's cleaning waste liquid. After the cleaning operation is started, the sensor continuously collects real-time detection data of the cleaning waste liquid and transmits the collected real-time data synchronously to the system control unit. The control unit compares the real-time detection data with the preset cleaning threshold item by item. If the detection data does not reach the preset cleaning threshold, the system continuously feeds back the cleaning status to the control unit and maintains the current cleaning operation, while continuously collecting and transmitting real-time detection data. If the detection data reaches the preset cleaning threshold, the system immediately feeds back the cleaning compliance status to the control unit and sends a cleaning termination control signal, and simultaneously generates a cleaning effect monitoring data record. The cleaning effect monitoring data record includes real-time detection data of waste liquid, cleaning duration, and cleaning completion status information.

[0081] Specifically, the method for initiating the system component linkage reset procedure is as follows: The PLC control unit actively triggers the system component linkage reset program. First, it cuts off the power supply to the stirring motor, lifting motor, high-pressure cleaning pump, and water pump, and performs a stop and return operation on the actuators. The position sensors collect the return signals of each actuator. Then, it performs a reset and closure operation on the container valves of the liquid medicine storage tank, secondary dilution tank, mixing metering tank, and main mixing tank, as well as the electric valves of the guide pipes between each functional unit. The status sensors collect the closure signals of all valves. Subsequently, it performs a full reset operation on the drug preparation and cleaning operation parameters and process cache data in the PLC control unit, restoring all parameters to the initial system settings. Then, it performs a full-dimensional status inspection operation on the reset actuators, valves, and control units, collecting real-time operating status data of each component. After all components have completed the reset and are in normal condition, a reset status record is generated. Finally, the PLC control unit actively terminates the system component linkage reset program.

[0082] Specifically, the method for obtaining relevant data for the entire drug preparation and pre-cleaning process is as follows: A multi-node data acquisition link is built based on a PLC control unit to cover the entire drug preparation and cleaning process. This acquisition link is connected to the signal output terminals of various sensors, actuators, and monitoring mechanisms. Acquisition nodes are divided according to the process stages: drug preparation parameter setting, drug pretreatment, mixing and metering, graded and directional cleaning, and system component reset. Multi-dimensional operational data is collected at each stage. Preprocessing operations are performed on this multi-dimensional operational data, including format standardization, redundant data removal, and anomaly screening. The preprocessed data is then integrated into a structured dataset. Real-time communication between the acquisition link and the PLC control unit is maintained during acquisition until all operations in the drug preparation and pre-cleaning process are completed. At this point, the data acquisition link is actively disconnected, data acquisition stops, and the integrated structured data for the entire drug preparation and pre-cleaning process is generated. This multi-dimensional operational data includes process operation parameters, equipment operating status data, detection and verification data, and cleaning effect monitoring data. Specifically, the method for classifying and encrypting the data related to the entire process is as follows: Data Classification: The integrated structured data from the entire pre-cleaning and dispensing process is proactively and meticulously categorized according to the generation scenario and actual use. This categorizes the data into four main types: dispensing process parameters, equipment operating status data, testing and verification results data, and cleaning effect monitoring data, enabling classified data management. Encryption Processing: Each categorized data type is proactively encrypted using encryption algorithms. An independent local encrypted storage directory is allocated to each data type, generating encrypted data files and assigning a unique identification code to each file to ensure data storage security. Dual-Mode Storage: A dual-mode data management approach, combining local storage and remote transmission, is employed to manage the encrypted data files. The encrypted data is actively stored in the local data storage module according to the corresponding storage directory, and simultaneously transmitted to the remote data platform via the 4G / 5G transmission module to meet the data traceability requirements of the entire agricultural pesticide application process. Integrity verification operation: During data storage and remote transmission, integrity verification is actively performed on each encrypted data file to check for any damage or data loss, ensuring data integrity. Record retention operation: After all classified data has been encrypted and remotely transmitted, a data classification encryption storage completion record is actively generated. The identification code of each encrypted data file is associated with the collection time and process stage information and retained uniformly to achieve data traceability and query.

[0083] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A multi-branch cleaning loop and control method based on an agricultural pesticide dispensing system, characterized in that, include: S1: Obtain relevant parameters for pesticide application, and generate a set of key parameters for pesticide application by combining crop type, pest and disease severity, application area and ambient temperature and humidity. Initiate a targeted pre-cleaning process to perform differentiated cleaning operations on the agricultural pesticide application system, and dynamically adjust the cleaning pressure and duration; S2: A multimodal agent pretreatment strategy is preset, which performs homogenization stirring on liquid agents and a secondary dilution process of base water premixing-high-speed dispersion on solid powder agents; through metering and stirring linkage control, the stirring parameters are dynamically adjusted in combination with real-time collected agent state data, and the homogenization of the mixed agents is verified to form a homogenized and qualified agent solution; S3: Construct a multi-branch independent control cleaning loop, pressurize the cleaning medium and distribute it to the dedicated cleaning branch of the functional area, perform graded and directional cleaning of the agricultural pesticide application system, and simultaneously feed back the real-time status through the cleaning effect monitoring mechanism to generate cleaning effect monitoring data records. S4: Initiate the system component linkage reset program, and perform linkage reset on the actuator, valve and control unit based on the preset reset logic; acquire relevant data of the entire process of drug preparation and pre-cleaning, and adopt a dual-mode data management scheme of local encrypted storage and remote cloud backup to classify and encrypt the relevant data of the entire process and upload it to the cloud platform simultaneously.

2. The method according to claim 1, characterized in that, The targeted pre-cleaning process specifically includes: The storage area, pretreatment area and corresponding flow channel related to pesticide dispensing in the agricultural pesticide dispensing system are pre-cleaned. A fixed amount of clean water is injected into the cleaning circuit according to a preset ratio. The water is pressurized by a high-pressure cleaning pump to form a flushing water flow, which directionally washes away the residual pesticide solution. The mixed solution after flushing is introduced into the mixing metering machine through a dedicated guide pipe. The total amount of the mixed solution is measured in real time, and the residual pesticide solution is generated and transmitted to the system control unit at the same time.

3. The method according to claim 1, characterized in that, The specific method for dynamically adjusting the cleaning pressure and duration is as follows: Based on the drug type and residual drug volume in the key parameters set for drug preparation, and combined with the preset cleaning parameter mapping relationship, the corresponding initial cleaning pressure value and initial cleaning duration value are obtained; the control unit outputs based on the initial cleaning pressure value and executes the cleaning operation for the initial cleaning duration value based on the time. The system collects sensor data characterizing the cleaning effect in real time, and adjusts the cleaning pressure and cleaning duration values ​​in real time based on the comparison between the sensor data and preset thresholds.

4. The method according to claim 1, characterized in that, The multimodal drug pretreatment strategy specifically includes: Based on the appropriate pretreatment operations for liquid and solid powder agents, for liquid agents, continuous homogenization stirring is performed at a preset fixed speed; for solid powder agents, a preset amount of base water is added to a dedicated secondary dilution treatment area, and solid powder is quantitatively added to perform a secondary dilution process of base water premixing and high-speed dispersion, so as to form a homogeneous agent.

5. The method according to claim 1, characterized in that, The method of controlling the flow through a combination of metering and stirring is as follows: The system employs both flow and weight detection to simultaneously collect drug delivery data. By switching between individual and mixed metering modes, it calculates and controls the drug dosage based on preset multiplier parameters. Simultaneously, it starts the stirring device to perform preliminary mixing of the drug. The mixing amount of the drug is calibrated by weight detection, and the stirring parameters are dynamically adjusted based on the calibration data to achieve real-time linkage control between metering and stirring.

6. The method according to claim 1, characterized in that, The method for homogenizing and validating the mixed reagents is as follows: Collect test samples of the mixed reagents, conduct concentration distribution and particle dispersion tests on the test samples, obtain test data after sample testing, compare the test data with the preset homogenization threshold one by one, and generate corresponding homogenization verification results and test data records.

7. The method according to claim 1, characterized in that, The specific method for constructing a multi-branch independent control cleaning loop is as follows: A main cleaning pipeline is pre-set, and a high-pressure cleaning pump is added to the main pipeline. Based on the functional areas of the agricultural pesticide dispensing system, dedicated cleaning branches for each functional area are set off from the main pipeline. The electric control valves and high-pressure cleaning pumps of each branch are electrically connected to the system control unit to form a closed-loop cleaning circuit that can be independently controlled by each branch. The functional areas of the agricultural pesticide dispensing system include pesticide storage, pretreatment, mixing and metering, and main mixing.

8. The method according to claim 1, characterized in that, The specific method for performing hierarchical and targeted cleaning is as follows: A pre-defined tiered cleaning strategy is implemented, consisting of container-level, pipeline-level, and interface-level cleaning. Container-level cleaning involves opening the corresponding electric control valve on the cleaning branch of the container, pressurizing the cleaning medium via a high-pressure cleaning pump, and performing high-pressure spray cleaning on the inner walls of each functional area. Pipeline-level cleaning involves opening the electric control valve corresponding to the branch guide pipe, circulating the high-pressure cleaning medium within the dedicated guide pipe for each functional area. Interface-level cleaning involves opening the dedicated cleaning nozzle at the interface, spraying and rinsing the connecting interfaces of each guide pipe and the inlet / outlet flanges of the container, performing the cleaning operation step by step.

9. The method according to claim 1, characterized in that, The method for providing real-time status feedback through the cleaning effect monitoring mechanism is as follows: Based on the multi-dimensional detection components preset at the cleaning waste liquid discharge outlet, real-time detection data of the cleaning waste liquid is obtained. The real-time detection data is analyzed in real time and the cleaning status is fed back synchronously. The real-time detection data is compared with the preset cleaning threshold item by item to generate cleaning effect monitoring data records.

10. The method according to claim 1, characterized in that, The specific method for initiating the system component linkage reset procedure is as follows: The system control unit triggers a linkage reset procedure to perform a shutdown and return operation on the actuator, and a reset and closure operation on the valves of each pipeline and container, adjusting all valves to the normally closed initial state. Then, the drug dispensing and cleaning operation parameters and process cache data of the control unit are reset. After the reset, the status of the actuator, valves and control unit are inspected, and a reset status record is generated.

11. The method according to claim 1, characterized in that, The specific method for obtaining relevant data for the entire drug preparation and pre-cleaning process is as follows: A multi-node data acquisition link is built based on the system control unit to collect multi-dimensional operation data of the entire process in real time. The multi-dimensional operation data of the entire process is preprocessed to be formatted and regularized. Real-time bidirectional communication between the multi-node data acquisition link and the control unit is executed to generate integrated structured drug dispensing and pre-cleaning process related data. The multi-dimensional operation data of the entire process includes process operation parameters, equipment operation status data, detection and verification data and cleaning effect monitoring data.

12. The method according to claim 1, characterized in that, The specific method for classifying and encrypting the data related to the entire process is as follows: Based on the generation scenario and actual use, the relevant data of the entire process is classified; encryption algorithms are used for encryption processing, and the classified data is allocated to an independent local encrypted storage directory to generate encrypted data files; a dual-mode data management method of local storage and remote transmission is adopted, in which the encrypted data files are stored locally according to the corresponding storage directory, and the encrypted data is synchronously transmitted to the remote data platform through the transmission module; the integrity verification operation is performed on each encrypted data file simultaneously to generate data classification encrypted storage records.

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