Intelligent wind screen type seed cleaning control system and method thereof

Abstract

The application provides an intelligent wind screen type seed cleaning control system and method, and belongs to the field of visual identification and automatic control. Based on the collection of visual identification data, the application adopts an iterative calculation method of inner loop parallel processing and outer loop timing processing and closed loop iteration. The control system is composed of a controller, an executing mechanism and a sensing detection unit. The control method is performed according to the logical order of data collection, inner loop parallel processing, outer loop timing processing and closed loop iteration; the inner loop and the outer loop are independently operated in parallel, one-way communication is realized between the two through a saturation sign, and the preset value adjustment step is adjusted; based on a multi-objective optimization model, an autonomous priority and collaborative supplement two-stage strategy is adopted to solve the optimal control parameters of the front and rear wind selection coupling; the adjusting amount output by each processing step is monitored in real time, and the adjusting amount is applied to the executing mechanism after the wind screen type cleaning operation; when the state result changes, the data collection stage is re-entered, and a closed loop control is formed.

Description

Technical Field

[0001] This application relates to the field of visual recognition and automated control, and specifically proposes an intelligent wind-screen seed cleaning control system and method based on visual recognition. Background Technology

[0002] The air-screening cleaner is a core piece of equipment for post-harvest seed processing. It commonly uses a combination of air separation and screening to separate light impurities, chaff, dust, large particles, small particles, broken grains, half grains, and heavy impurities from seeds.

[0003] Existing technologies typically employ a "pre-air separation-screening-post-air separation" process, supplemented by manual observation of the material state at the impurity discharge port and finished product outlet, and manual adjustment of dampers, airflow, screen bed vibration frequency, and feed rate. Air separation removes light impurities, while screening separates heavy impurities. Therefore, the following are the main defects and shortcomings in terms of control: 1) The control method relies on human experience; Because the operation mainly relies on manual adjustment and fixed parameters, operators need to manually adjust parameters such as the damper and vibration frequency based on visual inspection. Since the characteristics of seed variety, moisture content, and impurity content change dynamically, fixed parameters cannot be adapted, leading to unstable cleaning results. This results in a high dependence on the experience of skilled technicians, a complex and repetitive adjustment process, and difficulty in ensuring consistent cleaning quality.

[0004] 2) There is no effective solution to the problem of coupling between front and rear wind sorting; The front and rear air separators share a dust removal fan and baffles, and the airflow distribution is determined by both the dust removal fan speed and the baffle opening. The independent actuators of the front air separator (front suction duct width, front pressure regulating door) and the rear air separator (rear suction duct height, rear pressure regulating door) do not affect each other when adjusted individually. However, adjusting the shared components (dust removal fan, baffles) simultaneously changes the airflow in both the front and rear settling chambers, leading to a coupling problem between the front and rear air separators. This can easily result in insufficient removal of light impurities or accidental aspiration of good seeds. Existing control strategies lack effective decoupling methods; when adjusting the shared components, the front and rear air separators cannot simultaneously achieve optimal cleaning conditions.

[0005] 3) Lack of automatic load regulation mechanism; When the system's cleaning capacity is insufficient, such as when the feed rate is too high or the material impurity rate is too high, the lack of an automatic load reduction mechanism leads to the cleaning quality failing to meet standards for a long time; conversely, when the capacity is excessive, it will result in energy waste.

[0006] 4) Difficulty in perceiving state; Current technologies still primarily rely on wind speed measurements to indirectly infer the state of the settling chamber. However, wind speed sensors are prone to contamination and drift in dusty environments; wind speed distribution across the duct cross-section is uneven, resulting in poor representativeness of single-point measurements; and the critical suspension velocities vary for different materials, requiring repeated calibration and making them unsuitable as a basis for precise control.

[0007] In view of the above, this application is hereby submitted. Summary of the Invention

[0008] The intelligent wind-screen seed cleaning control system and method proposed in this application aim to solve the problems existing in the prior art by collecting visual recognition data and adopting iterative calculation methods of inner loop parallel processing and outer loop timed processing and closed loop iteration, so as to achieve automatic control of the entire wind-screen cleaning process. The optimal control parameters of the coupled wind-screen problem are solved through a two-level strategy of autonomous priority and collaborative supplementation, so as to significantly improve the cleaning control accuracy and overall operation efficiency.

[0009] To achieve the above design objectives, the intelligent air-screen seed cleaning control system comprises a controller, an actuator, and a sensing unit. The controller receives data and status information collected by the sensing unit, and controls the actuator's actions and operating status via commands based on a hierarchical algorithm, thereby achieving adaptive adjustment and coordinated optimization of various parameters in the cleaning process. The sensing unit includes: The first visual recognition unit, located at the outlet of the front settling chamber, is used to acquire images of the outlet in real time and identify whether good seeds have been extracted based on a deep learning algorithm. The output data of the first visual recognition unit is... ; The second vision recognition unit, located at the feed inlet of the lower screen, is used to detect whether large impurities are still present in the remaining material after screening by the upper screen. The output data of the second vision recognition unit is the large particle residue rate. ; The third visual recognition unit, located at the outlet of the lower sieve cleaned seeds, is used to detect whether small impurities are still present in the cleaned seeds. The output data of the third visual recognition unit is the small particle residue rate. ; The fourth visual recognition unit, located at the outlet of the rear settling chamber, is used to acquire images of the outlet in real time and identify whether good seeds have been extracted based on a deep learning algorithm. The output data of the fourth visual recognition unit is... ; The fifth visual recognition unit, located at the final outlet, is used to detect the cleaned seeds and output the final impurity content. The actual output processing capacity of the equipment is ; The controller is preferably a PLC or an embedded control system.

[0010] The aforementioned actuators include: The front air separation actuator, located in the front air intake duct, includes a mechanism for adjusting the width of the front air intake duct. Front air intake duct width adjustment device, used to adjust the opening of the front pressure regulating door. The front air intake duct pressure regulating device; Set in the screening system to adjust the vibration frequency of the screen box. The screen box vibration frequency adjustment device simultaneously controls the synchronous operation of the upper and lower screens and adjusts the operating status and parameters. The rear air separation actuator, located in the rear air intake duct, includes a mechanism for adjusting the height of the rear air intake duct. The rear air intake height adjustment device is used to adjust the opening of the rear pressure regulating door. The rear air intake duct pressure regulating device; Located between the front and rear settling chambers, it is used to adjust the opening of the partition. A baffle opening adjustment device for adjusting the air volume distribution between the front and rear settling chambers; And, for adjusting the speed and operating parameters of the dust collector fan. A dust collector fan speed regulating device for adjusting the total air volume.

[0011] Based on the aforementioned intelligent air-screen seed cleaning control system, this application also proposes the following intelligent air-screen seed cleaning control method: The system operates in a logical sequence of data acquisition, inner-loop parallel processing, outer-loop timed processing, and closed-loop iteration to achieve automatic control of the entire cleaning process; the inner and outer loops operate independently in parallel, communicating unidirectionally via a saturation flag and adjusting the step size according to a preset value; the optimal control parameters for the coupling between the preceding and following air-screening processes are solved based on a multi-objective optimization model and employing a two-level strategy of autonomous priority and collaborative supplementation; the adjustment output of each processing step is monitored in real time and applied to the actuators after the air-screen cleaning operation; when the state result changes, the system re-enters the data acquisition stage, forming a closed-loop control.

[0012] The method includes the following implementation process: Step S1: Device initialization; The control system performs overall machine initialization. The controller performs self-test and initializes each actuator to a preset initial state, sets control parameters, physical range and adjustment step size, and initializes state variables. After initialization, the controller reads the preset target parameters; if the actuator is configured to adjust the external negative pressure source, the controller synchronously reads the initial operating speed and operating parameters of the external negative pressure source. If the external negative pressure source does not have an adjustment function, then It does not participate in the following control logic operations; Step S2: Automatic sampling and image acquisition; After the equipment is running, it automatically acquires the sampling data of the visual recognition unit according to the preset cycle, so as to obtain image data that can reflect the front air classification, screening, rear air classification and finished product discharge status through multi-station continuous sampling and shooting. Step S3: Image recognition and state quantity generation; The host computer preprocesses and intelligently recognizes the acquired images, and quantifies and outputs the operating status parameters of each actuator. Step S4: Evaluation of cleaning effect; The controller classifies and judges the overall cleaning effect of the machine based on the operating status parameters; Step S5: Parallel processing of the inner loop; This includes independent, parallel processing stages for wind selection and screening, enabling rapid cycle times. Continuously run to perform the following parallel processing on the collected data; The wind separation stage includes front wind separation control processing, rear wind separation control processing, and front-rear wind separation coordinated control processing steps; among them, the front wind separation control processing and the rear wind separation control processing are executed in parallel, and after the two are completed, a unified judgment is made on whether the front-rear wind separation coordinated control processing needs to be executed. The screening and air-selection stages are executed in parallel. During this stage, input... Output vibration frequency adjustment amount ; Step S6: Limit judgment of the actuator; Inner loop parallel processing and the following outer loop feed regulation via saturation flag Establish one-way data communication; Saturation detection is performed in parallel with the screening inner loop adjustment after the air classifier inner loop adjustment is completed; that is, at the end of each parallel processing cycle of the inner loop, it is checked whether the shared actuator has reached the limit of the physical parameter range, including the dust collector fan speed. and partition opening If so, and the current impurity level Then set Otherwise, it is 0; Saturation flag The detection results are transmitted to the outer ring feed adjustment stage as one of the triggering conditions for feed adjustment; Step S7: Adjust the outer ring feed. The outer ring feed adjustment cycle is much longer than the inner ring parallel processing cycle, i.e. This is to avoid interference between the inner and outer rings; With slow cycle Execute on a schedule, input Limiting output feed motor speed adjustment The outer ring feed adjustment is read during each run. As one of the triggering conditions; if and This immediately triggers a reduction in feed, without requiring a waiting time. ; Step S8: Closed-loop iteration; After the single inner loop parallel processing and / or outer loop feed adjustment are completed, the machine automatically returns to step S2 and continues to cycle, enabling the wind-screen seed cleaner to adapt to different material states and load fluctuations in order to maintain stable cleaning performance in the long term.

[0013] In step S2, the collected data includes images of the front settling chamber outlet. Image of the outlet of the settling chamber Image of material after screening Image of the sieved seeds exiting the sieve Final export image The state variables obtained after preprocessing are: the state of the front settling chamber. Post-settlement chamber status Large particle residue rate Small particle residue rate Final impurity .

[0014] Step S3 includes the seed loss status in the pre-sedimentation chamber. Seed loss status in the post-settling chamber The state of residual large particles on the upper screen, the state of residual small particles on the lower screen, the type of impurities at the rear outlet, and the impurity content of the finished product at the main outlet. And the uniformity of the feeding of the feed material.

[0015] In step S4, when At that time, it was determined that the front suction force was too strong, which could lead to the accidental aspiration and loss of good seeds; when At that time, it was determined that the suction force was too strong, which could lead to the accidental aspiration and loss of good seeds; when or Furthermore, if the residual impurities in the material exceed the standard, it is determined that the suction power at the corresponding location is insufficient; When the residual impurities on the upper and lower screens exceed the standard, the screening effect is deemed insufficient. when When the finished product is found to have an excessive impurity rate, the impurities are uniformly classified into air-separated impurities and screened impurities, providing a basis for precise adjustment at each stage.

[0016] Step S5 includes: Step S5.1: Adjust the inner ring of the front air intake; The controller is based on the seed loss status in the front settling chamber. Based on the front airflow identification results, independently adjust the width of the front air intake duct and the opening of the front pressure regulating door; when If the front exhaust system's impurity removal effect is insufficient, execute the enhanced front suction operation; when When there is excessive seed loss, the front suction operation is reduced; when the front air separation and impurity removal effect meets the standard and there is no seed loss, the parameters of the current front air separation actuator remain unchanged, so that the front suction is stable in the optimal working range. Step S5.2: Adjust the inner ring of the rear air separator; The controller is based on the seed loss status in the rear settling chamber. The rear exhaust manifold and the finished product impurity status at the main exhaust port can be independently adjusted, as can the height of the rear suction hood and the opening of the rear pressure regulating door. when Furthermore, if the removal of light impurities in the later stage is insufficient, an enhanced suction operation is performed; when When there is excessive seed loss, the suction operation is reduced; when the rear air separation meets the standards and there is no seed loss, the parameters of the current rear air separation actuator remain unchanged. Step S5.3: Coordinated adjustment of front and rear air separation; By the opening of the partition To achieve dynamic air volume distribution in dual air chambers, the coupling interference between front and rear air selection is offset by adjusting the air volume distribution. Air volume distribution satisfies the following formula: , ; in, For the air volume of the pre-settlement chamber, For the air volume of the post-settlement chamber, This refers to the characteristic coefficient of the dust collector fan. These are the operating parameters for the external negative pressure source. This refers to the normalized opening parameter of the partition; Step S5.4: Joint optimization and coordinated adjustment of air separation; If the aforementioned coordinated adjustment of the pre- and post-wind separation occurs within a preset time... It is still impossible to achieve internally. , When the system reaches a stable state, the control system initiates the following wind separation joint optimization and coordinated adjustment: The primary goal is to minimize the loss of good seeds due to accidental aspiration, while the secondary goal is to improve the impurity removal effect of air separation. Global optimization and correction are performed on all parameters of the front and rear air separation to solve the problem that it is difficult to achieve steady-state standards through repeated adjustments of a single mechanism. Define the following multi-objective optimization function:

[0017] Solve the optimization problem:

[0018] The optimal control parameters are solved online using an optimization algorithm. Step S5.5: Filter inner loop adjustment; The inner ring adjustment of the screening and the inner ring adjustment of the air separation are performed in parallel, and the vibration frequency of the screen box is adjusted independently during the screening stage. ; Based on the monitoring results of the material residue on the upper and lower screens, the controller increases the vibration frequency of the screen bed until it meets the standard when there are large particles of impurities remaining on the upper screen, thereby enhancing the screening and separation effect of large impurities; when there are small particles of impurities remaining on the lower screen, it increases the vibration frequency to improve the ability to clean fine impurities; when all screening indicators of the upper and lower screens meet the standards, it gradually reduces the vibration frequency to achieve energy-saving and loss-reducing operation. If the screening residue cannot be eliminated even when the vibration frequency of the screen bed is adjusted to the upper limit, it is determined that the current feed load exceeds the screening processing capacity, a screening failure flag is generated and fed back to the outer loop adjustment stage.

[0019] In step S6, the saturation flag of the dust collector fan is defined. and partition saturation mark as follows:

[0020]

[0021] in, This is an indicator function; it takes the value 1 when the condition inside the parentheses is true, and 0 otherwise. The preset limit threshold is used to avoid frequent misjudgments caused by numerical fluctuations. These are the minimum and maximum allowable speeds of the dust collector fan, respectively. The partition opening is 0, which indicates that the forward settling chamber is fully open, and 1 indicates that the rear settling chamber is fully open. When the dust collector fan speed approaches its upper limit ( or close to the lower limit ( )hour, This indicates that the dust removal fan has reached or is close to its physical limit. When the partition opening approaches the upper limit ( or close to the lower limit ( )hour, This indicates that the partition has reached or is close to its physical limit; This is the limit threshold; The update rule for the saturation flag is as follows:

[0022] When any shared actuator reaches or approaches its physical limit, and the current final impurity level... Higher than the target value When the saturation flag is set to 1; When the above saturation flag After being transmitted to the outer ring feed adjustment stage, the outer ring will immediately trigger a reduction in feed. If the shared actuator is not saturated or the impurity content has reached the standard, the saturation flag is 0, and the outer ring feed adjustment stage will determine whether to adjust the feed according to its own normal rules.

[0023] In summary, this application has the following beneficial effects and advantages compared with the prior art: 1. This application adopts an inner and outer loop layered decoupling method. The inner loop responds quickly to local state changes while the outer loop adjusts the global feed load slowly. The time scales of the two are separated. At the same time, unidirectional communication through saturation flags can effectively avoid mutual interference and ensure the stability and rapid response of the overall control system.

[0024] 2. This application adopts visual recognition to replace wind speed measurement, and uses deep learning to directly identify whether there are good seeds in the settling chamber. This eliminates the need for a dedicated wind speed sensor and effectively avoids problems such as dust pollution and calibration difficulties. The cleaning and air sieve status detection is reliable and significantly improves the calculation accuracy of the control system.

[0025] 3. This application adopts a two-level control strategy of prioritizing autonomy and supplementing with coordination. The independent actuators can adjust autonomously in parallel, and coordination control is initiated only when the autonomous capability is exhausted and there is still seed loss, thus taking into account both the real-time performance and the optimality of the control system.

[0026] 4. The two-level decoupling method of superimposing and optimizing the inner and outer loop processing rules proposed in this application enables the processing rules to respond quickly and collaboratively, significantly optimizing the collaborative online solution of multi-objective functions (seed loss, impurity rate, energy consumption) and completely solving the problem of coupling between the front and rear wind sorting.

[0027] 5. This application proposes a dual-trigger feed adjustment mechanism, which automatically and quickly takes measures to reduce the feed when the feed continuously exceeds the standard or is saturated and exceeds the standard. It is suitable for trial production increase when the quality meets the standard but the processing volume is insufficient, and achieves synergy between quality and output. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. Some specific embodiments of this application will be described in detail below with reference to the accompanying drawings in an exemplary and non-limiting manner. The same reference numerals in the drawings designate the same or similar parts or components. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale.

[0029] Figure 1A schematic diagram of the overall structure of an air-screen seed cleaning system; Figure 2 For example Figure 1 Cross-sectional view of the structure shown; Figure 3 This is a structural block diagram of the intelligent air-screen seed cleaning and control system described in this application; Figure 4 This is a schematic diagram of the control principle for intelligent air-screen seed cleaning. Figure 5 This is a flowchart of the intelligent air-screen seed cleaning control method described in this application; Figure 6 Flowchart of autonomous control forewind selection; Figure 7 Flowchart of autonomous control process for post-wind separation; Figure 8 A flowchart for coordinated control of front and rear wind separation; Figure 9 A flowchart of the first strategy for coordinated control of front and rear wind separation; Figure 10 A flowchart for the second strategy of coordinated control between front and rear wind separation; Figure 11 A flowchart for the third strategy of coordinated control between front and rear wind separation; Figure 12 A flowchart for the fourth strategy of coordinated control between front and rear wind separation; Figure 13 For screening control flow chart; exist Figure 1 and Figure 2 In the middle, 1-feeding motor, 2-feeding hopper, 3-front suction duct motor, 4-front pressure regulating door motor, 5-front pressure regulating door, 6-airflow speed control board motor, 7-main air outlet, 8-rear pressure regulating door motor, 9-rear pressure regulating door, 10-rear suction hood lifting motor, 11-rear suction hood, 12-automatic sampling visual inspection mechanism, 13-screen box motor, 14-front settling chamber, 15-rear settling chamber, 16-bottom fan; Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application 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 application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] Example 1, as Figure 1 and Figure 2As shown, a wind-screen seed cleaner according to this application includes a main body that serves as the foundation for equipment installation and support. Within the main body, along the cleaning process route, there are respectively arranged a feeding amount adjustment structure driven by a feeding motor 1, a front suction duct and its adjustment mechanism driven by a front suction duct motor 3 and a front pressure regulating gate motor 4, a screening mechanism driven by a screen box motor 13, a rear suction duct and its adjustment mechanism driven by a rear pressure regulating gate motor 8 and a rear suction duct lifting motor 10, an automatic sampling visual inspection device 12, and a control system.

[0032] The material to be cleaned passes sequentially through the feeding hopper 2, the front suction duct, the screening system, the rear screening area, and the main discharge port. Light impurities, dust, and chaff particles sucked out by the front suction duct enter the front settling chamber 14, while chaff particles, medium-light impurities, and light impurities sucked out by the rear suction hood 11 enter the rear settling chamber 15. Large impurities, small impurities, broken particles, half-particles, or heavy impurities separated by the screening system are discharged through their respective discharge ports. Qualified seeds that meet the requirements are discharged through the main discharge port.

[0033] like Figure 3 As shown, the intelligent wind-screen seed cleaning and control system proposed in this application consists of a controller, an actuator, and a sensing and detection unit. Specifically, The controller is preferably a PLC or an embedded control system, used to receive data and status information collected by the sensing and detection unit, and control the action coordination and operation status of the actuator through instructions based on a hierarchical algorithm, so as to realize the adaptive adjustment and collaborative optimization of various parameters in the cleaning process; The sensing and detection unit includes: The first visual recognition unit, preferably equipped with a 2D camera, is installed at the outlet of the front settling chamber 14 to acquire images of the outlet in real time. Based on a deep learning algorithm, it identifies whether any good seeds have been extracted. The output data of the first visual recognition unit is... When plump, good seeds are detected in the sample discharged from the pre-sedimentation chamber, and the amount of accidental aspiration exceeds the preset allowable loss threshold, a value is assigned. Otherwise, assign a value. ; The second vision recognition unit, preferably a 2D camera, is installed at the feed inlet of the lower screen to detect whether large impurities are still present in the remaining material after screening from the upper screen. The output data of the second vision recognition unit is the large particle residue rate. ; A third visual recognition unit, preferably a 2D camera, is installed at the outlet of the cleaned seeds after sieving. This unit detects whether small impurities still remain in the cleaned seeds. The output data of the third visual recognition unit is the small particle residue rate. ; The fourth visual recognition unit, preferably a 2D camera, is installed at the outlet of the rear settling chamber 15. It is used to acquire images of the outlet of the rear settling chamber 15 in real time and, based on a deep learning algorithm, to identify whether good seeds have been extracted. The output data of the fourth visual recognition unit is... When plump, healthy seeds are detected in the sample discharged from the post-sedimentation chamber, and the amount of aspirated seeds exceeds a preset allowable loss threshold, a value is assigned. Otherwise, assign a value. ; The fifth visual recognition unit, preferably a 2D camera, located at the final exit, is used to detect the cleaned seeds and output the final impurity content. The actual output processing capacity of the equipment is ; The aforementioned actuators include: The front air separation actuator, located in the front air intake duct, includes a mechanism for adjusting the width of the front air intake duct. Front air intake duct width adjustment device, used to adjust the opening of the front pressure regulating door. The pressure regulating device for the front air intake duct is relatively independent and does not affect each other during operation; Set in the screening system to adjust the vibration frequency of the screen box. The screen box vibration frequency adjustment device can simultaneously control the synchronous operation of the upper and lower screens and adjust the operating status and parameters. The rear air separation actuator, located in the rear air intake duct, includes a mechanism for adjusting the height of the rear air intake hood. The rear suction hood height adjustment device is used to adjust the opening of the rear pressure regulating door. The pressure regulating device for the rear air intake duct is relatively independent and does not affect each other during operation; Located between the front settling chamber 14 and the rear settling chamber 15, used to adjust the opening of the partition. A baffle opening adjustment device for adjusting the air volume distribution between the front settling chamber 14 and the rear settling chamber 15; And, for adjusting the speed and operating parameters of the dust collector fan. A dust collector fan speed regulating device for adjusting the total air volume.

[0034] Based on the above-mentioned intelligent air-screen seed cleaning and control system, this embodiment defines the following parameters for the closed-loop iterative processing logic: 1.1 Time and Cycle; Discrete time step k corresponds to the inner loop period That is, each inner loop cycle is one time step; The outer loop time step m corresponds to the outer loop period. Where N is the number of inner loop cycles contained in an outer loop cycle; 1.2 Variables detected by the sensing unit; An output value of 1 indicates that a good seed has been mistakenly aspirated, while an output value of 0 indicates that there is no good seed. This is a direct indicator of whether the forewind selection is excessive. An output value of 1 indicates that a good seed was mistakenly aspirated, and an output value of 0 indicates that there are no good seeds. This is a direct indicator of whether the post-wind separation is excessive. Large particle residue rate of material after sieving This refers to the proportion of seeds whose size is larger than the mesh size of the upper sieve, which reflects whether the sieve has separated the seeds sufficiently. Small particle residue rate at the outlet of the sieved seeds This refers to the proportion of seeds whose size is smaller than the mesh size of the lower sieve, which reflects whether the lower sieve has separated the seeds sufficiently. Final export impurity content This is the ultimate indicator for measuring the quality of cleaning; Export processing volume The unit is kg / s, which reflects the total output of the equipment; 1.3 Parameter variables of the actuator; Former Wind Selection Implementation Agency:

[0035] in, The width of the front air intake duct. For the opening degree of the pressure regulating valve, both are normalized to the [0,1] interval; These are the lower and upper limits of the width of the front air intake duct, respectively. These are the lower and upper limits of the opening of the front pressure regulating valve, respectively. Post-selection execution agency:

[0036] in, The height of the rear air intake hood, For the opening of the pressure regulating valve, both are normalized to the [0,1] interval; Shared actuator for front and rear air separation:

[0037] in, This is the normalized value of the partition opening. An output value of 0 indicates that the forward air duct is fully open, and an output value of 1 indicates that the rear air duct is fully open. This refers to the rotational speed of the dust removal fan; These are the lower and upper limits of the dust collector fan speed, respectively; Screening agency:

[0038] in, The vibration frequency of the screen box. These are the lower and upper limits of the vibration frequency of the screen box, respectively. Feeding actuator:

[0039] in, n f,min To maintain the minimum rotational speed for continuous feeding (to avoid material blockage). n f,max This is the rated speed of the motor.

[0040] 1.4 Preset control parameters; Adjust step size: These correspond to the adjustment step size of each actuator; Control threshold: target impurity content Target processing volume , These are the upper and lower thresholds for the screening effect, respectively; Time parameters: ,in, This is the waiting time for the impurity content to exceed the limit, used to filter out brief disturbances; Limit threshold: Used for saturation detection, typically 1% to 5% of full scale; Optimize weights: These correspond to the weights of seed loss, excessive impurity content, and energy consumption, respectively. 1.5 State Machine States; Forward wind selection autonomous control status code, used to record the current adjustment phase; The rear wind selector autonomous control status code is also used to record the current adjustment stage; : The main state of collaborative control is controlled by The decision is used to determine whether collaborative control needs to be initiated and to select the appropriate collaborative strategy. The logical state within the front and rear wind separation collaborative control algorithm, used to record the first achievement event; 1.6 Auxiliary variables; : Shared actuator saturation flag, an output value of 1 indicates saturation and excessive impurity content; : The cumulative time of exceeding the impurity content standard, used to measure the time scale of the outer ring; like Figures 4 to 13As shown, based on the above control system, this application proposes the following intelligent air-screen seed cleaning control method, which follows the logical sequence of data acquisition, inner loop parallel processing, outer loop timed processing, and closed-loop iteration to achieve automatic control of the entire cleaning process; the inner and outer loops operate independently in parallel, communicate unidirectionally through a saturation flag, and adjust the step size according to a preset value; the optimal control parameters of the air-screen coupling are solved based on a multi-objective optimization model and a two-level strategy of autonomous priority and collaborative supplementation; the adjustment amount output by each processing step is monitored in real time and applied to the actuator after the air-screen cleaning operation; when the state result changes, the data acquisition stage is re-entered to form closed-loop control.

[0041] Specifically, the intelligent air-screen seed cleaning and control method has the following implementation stages: Step S1: Device initialization; The control system performs overall machine initialization. The controller performs self-test and initializes each actuator to a preset initial state, sets control parameters, physical range and adjustment step size, and initializes state variables. After initialization, the controller reads the preset target parameters, including the target impurity content. Allowable good seed loss threshold, target processing volume Initial width of the front suction duct, initial opening of the front pressure regulating door, initial height of the rear suction hood, initial opening of the rear pressure regulating door, initial opening of the partition, initial vibration frequency of the screen bed, and initial feeding speed; If the actuator is configured to adjust the external negative pressure source (such as a dust collector fan), the controller synchronously reads the initial operating speed and operating parameters of the external negative pressure source. If the external negative pressure source does not have an adjustment function, then It does not participate in the following control logic operations; Step S2: Automatic sampling and image acquisition; After the equipment is running, it automatically acquires the sampling data of the visual recognition unit according to the preset cycle, so as to obtain image data that can reflect the front air classification, screening, rear air classification and finished product discharge status through multi-station continuous sampling and shooting. The collected data includes: images of the front settling chamber outlet. Image of the outlet of the settling chamber Image of material after screening Image of the sieved seeds exiting the sieve Final export image The state variables obtained after preprocessing are: the state of the front settling chamber. Post-settlement chamber status Large particle residue rate Small particle residue rate Final impurity ; Step S3: Image recognition and state quantity generation; The host computer preprocesses and intelligently recognizes the acquired images, and quantifies and outputs the operating status parameters of each actuator. Includes: Seed loss status in the front settling chamber Seed loss status in the post-settling chamber The state of residual large particles on the upper screen, the state of residual small particles on the lower screen, the type of impurities at the rear outlet, and the impurity content of the finished product at the main outlet. ; Step S4: Evaluation of cleaning effect; The controller classifies and judges the overall cleaning effect of the machine based on the operating status parameters; Including: When At that time, it was determined that the front suction force was too strong, which could lead to the accidental aspiration and loss of good seeds; when At that time, it was determined that the suction force was too strong, which could lead to the accidental aspiration and loss of good seeds; when or Furthermore, if the residual impurities in the material exceed the standard, it is determined that the suction power at the corresponding location is insufficient; When the residual impurities on the upper and lower screens exceed the standard, the screening effect is deemed insufficient. when When the product is found to have excessive impurities, it is determined that the impurity content exceeds the standard. Simultaneously, impurities are uniformly classified into air-separated impurities and screened impurities, providing a basis for precise adjustment at each stage. Step S5: Parallel processing of the inner loop; This includes independent, parallel processing stages for wind selection and screening, enabling rapid cycle times. Continuously run to perform the following parallel processing on the collected data; The wind separation stage includes front wind separation control processing, rear wind separation control processing, and front-rear wind separation coordinated control processing steps; among them, the front wind separation control processing and the rear wind separation control processing are executed in parallel, and after the two are completed, a unified judgment is made on whether the front-rear wind separation coordinated control processing needs to be executed. The screening and air-selection stages are executed in parallel. During this stage, input... Output vibration frequency adjustment amount ; Step S5.1: Adjust the inner ring of the front air intake; The controller is based on the seed loss status in the front settling chamber. Based on the front airflow identification results, independently adjust the width of the front air intake duct and the opening of the front pressure regulating door; when If the front exhaust system's impurity removal effect is insufficient, execute the enhanced front suction operation; when When there is excessive seed loss, the front suction operation is reduced; when the front air separation and impurity removal effect meets the standard and there is no seed loss, the parameters of the current front air separation actuator remain unchanged, so that the front suction is stable in the optimal working range. Specifically, the former independent executive body ( Using a finite state machine according to The adjustment aims to ensure that the front settling chamber is "just free of good seeds." And it is close to the critical point; the state code vw0 is determined by the state of the previous settling chamber. It is determined together with the location of the autonomously modulating variable, and its calculation expression is as follows: Let the current inner loop period be k Known , , and current state Then the next period value

[0042] in, The preset fixed step size and actuator amplitude limiting constraints are applied as follows after each update:

[0043]

[0044] Among them, states 0 and 1 are extreme states, indicating that the actuator has been adjusted to the boundary of the physical parameter setting range and the state of the front settling chamber is consistent with the extreme state. At this time, the autonomous control cannot be further improved, so the parameters are not adjusted. States 2 and 3 are respectively in When increasing suction, prioritize adjusting the opening of the front pressure regulating door in state 2. If the front pressure regulating door has reached its minimum, then adjust the width of the front air intake duct in state 3. States 4 and 5 are respectively in When the suction is reduced, the width of the front air intake duct in state 4 is adjusted first. If the front air intake duct has reached its maximum width, the opening of the front pressure regulating door in state 5 is adjusted instead. Step S5.2: Adjust the inner ring of the rear air separator; The controller is based on the seed loss status in the rear settling chamber. The rear exhaust manifold and the finished product impurity status at the main exhaust port can be independently adjusted, as can the height of the rear suction hood and the opening of the rear pressure regulating door. when Furthermore, if the removal of light impurities in the later stage is insufficient, an enhanced suction operation is performed; when When there is excessive seed loss, the suction operation is reduced; when the rear air separation meets the standards and there is no seed loss, the parameters of the current rear air separation actuator remain unchanged. Specifically, the post-wind selection execution agency ( Using a finite state machine according to adjust, The goal is to ensure that the settling chamber "just has no good seeds" And it is close to the critical point; the state code vw2 is determined by the state of the rear settling chamber. It is determined together with the location of the autonomously modulating variable, and its calculation expression is as follows:

[0045] in, The preset fixed step size and actuator amplitude limiting constraints are applied as follows after each update:

[0046]

[0047] Among them, states 0 and 1 are extreme states, indicating that the rear air separation actuator has been adjusted to the range boundary of the physical parameters and the state of the rear settling chamber is consistent with the extreme state. At this time, no parameters are adjusted. States 2 and 3 are respectively in When the suction power is increased, the opening of the rear pressure regulating door in state 2 is adjusted first. If the rear pressure regulating door has reached the minimum opening value, the height of the rear suction hood in state 3 is adjusted instead. States 4 and 5 are respectively in When the suction is reduced, the height of the rear suction hood in state 4 is adjusted first. If the rear suction hood has reached its maximum height, the opening of the rear pressure regulating door in state 5 is adjusted instead. Step S5.3: Coordinated adjustment of front and rear air separation; Since the front and rear settling chambers share the same main air vent, there is a problem of airflow coupling interference. This is addressed by using a partition. To achieve dynamic air volume distribution in dual air chambers, the coupling interference between front and rear air selection is offset by adjusting the air volume distribution. Air volume distribution satisfies the following formula: , ; in, For the air volume of the pre-settlement chamber, For the air volume of the post-settlement chamber, This refers to the characteristic coefficient of the dust collector fan. These are the operating parameters for the external negative pressure source. This refers to the normalized opening parameter of the partition; Specifically, when the autonomous control of the current and rear air classifier inner loop adjustment cannot eliminate seed loss or the air classifier intensity is insufficient, collaborative control is activated. The main state of collaborative control is determined by the state of the front and rear settling chambers, and the expressions for the four collaborative strategies are as follows:

[0048] The first rule-based coordination strategy vw 4=0, meaning there are no good seeds in either the front or rear settling chambers; by increasing the total air volume, good seeds appear in both the front and rear settling chambers, and then the air separator that first produces good seeds reduces its suction to the critical point to achieve a balanced state of "just no good seeds". At the same time, increase the suction power of the front and rear air separation to increase the speed of the dust removal fan:

[0049] Until and ;set up The moment when the first good seed appears. For the second time when good seeds appear, make autonomous fine-tuning based on the order of occurrence: If good seeds appear first in the front settling chamber ( When good seeds have just appeared in the rear settling chamber, the front air selection automatically adjusts towards a direction with lower suction, including first widening the front air intake duct. Then adjust the front pressure regulating door. Until the front settling chamber is completely empty of good seeds; If good seeds appear first in the settling chamber ( When good seeds first appear in the settling chamber, the rear air separator automatically adjusts towards a lower suction direction, including first raising the rear air hood. After adjusting the pressure gate, Until there are no good seeds left in the settling chamber; The second rule-based coordination strategy vw 4=1, meaning there are no good seeds in the front settling chamber and good seeds in the rear settling chamber; by adjusting the baffle to change the air volume distribution, the air volume of the front and rear settling chambers changes complementaryly until the states of the two chambers are exchanged, and then autonomous fine-tuning is performed to achieve balance. Increase the front air separation suction and decrease the rear air separation suction to adjust the forward settling direction of the baffle:

[0050] Until and ,set up This is the time when good seeds appear in the pre-settling chamber. To determine when the settling chamber becomes free of good seeds, autonomous fine-tuning is performed according to the sequence of events: If the forewind option prioritizes achieving the objective ( When there are no good seeds left in the rear settling chamber, the front air intake automatically adjusts towards the direction of weaker suction, i.e., it first widens the suction. Increase it again Until the front settling chamber is completely empty of good seeds; If the target is satisfied first (the wind direction is reversed) When there are good seeds in the settling chamber, the rear air separator automatically adjusts to the direction of stronger suction, that is, it first lowers the suction. Adjust it down again Until there are no good seeds left in the settling chamber; The third rule-based coordination strategy vw 4=2, meaning there are good seeds in the front settling chamber and no good seeds in the rear settling chamber; take measures opposite to the second rule coordination strategy, adjust the baffle in the opposite direction to achieve air volume redistribution, so that the air volume of the front and rear settling chambers changes complementaryly until the states of the two chambers are exchanged, and then perform autonomous fine-tuning to achieve balance; Reduce the front air separation suction and increase the rear air separation suction respectively to adjust the rearward settling direction of the baffle:

[0051] Until and ,set up This is the time when good seeds appear in the post-settling chamber. When the pre-sedimentation chamber becomes free of good seeds, autonomous fine-tuning is performed according to the sequence of events: If the target is satisfied first (the wind direction is reversed) When there are no good seeds in the settling chamber, the rear air separator automatically adjusts to the direction of weaker suction, that is, it first adjusts to higher suction. Increase it again Until there are no good seeds left in the settling chamber; If the forewind option prioritizes achieving the objective ( When the rear settling chamber has just contained good seeds, the front air filter automatically adjusts to the direction of stronger suction, i.e., it first narrows the suction. Adjust it down again Until there are just enough good seeds in the front settling chamber; The fourth rule-based collaborative strategy vw 4=3, both the front and rear settling chambers have good seeds; by reducing the total air volume, both the front and rear settling chambers are empty of good seeds, and then the air separator that initially had no good seeds increases its suction to the critical point to achieve a balanced state. Reduce the speed of the dust collector fan:

[0052] until and ,set up For the first moment when there are no good seeds, For the second moment when there are no good seeds, make autonomous fine-tuning according to the order of occurrence: If there are no good seeds in the subsequent settling chamber ( When there are no good seeds in the settling chamber, the rear air separator automatically adjusts to the direction of stronger suction, that is, it first lowers the suction. Adjust it down again Until the rear settling chamber has just the right amount of good seeds; If there are no good seeds in the pre-sedimentation chamber ( When the rear settling chamber has just contained good seeds, the front air filter automatically adjusts to the direction of stronger suction, i.e., it first narrows the suction. Adjust it down again Until there are just enough good seeds in the front settling chamber; Step S5.4: Joint optimization and coordinated adjustment of air separation; If the aforementioned coordinated adjustment of the pre- and post-wind separation is within the preset time... It is still impossible to achieve internally. , When the system reaches a stable state, the control system initiates the following wind separation joint optimization and coordinated adjustment: The primary goal is to minimize the loss of good seeds due to accidental aspiration, while the secondary goal is to improve the impurity removal effect of air separation. Global optimization and correction are performed on all parameters of the front and rear air separation to solve the problem that it is difficult to achieve steady-state standards through repeated adjustments of a single mechanism. Define the following multi-objective optimization function:

[0053] Solve the optimization problem:

[0054] The optimal control parameters are solved online using an optimization algorithm. Step S5.5: Filter inner loop adjustment; The inner ring adjustment of the screening and the inner ring adjustment of the air separation are performed in parallel, and the vibration frequency of the screen box is adjusted independently during the screening stage. ; Based on the monitoring results of the material residue on the upper and lower screens, the controller increases the vibration frequency of the screen bed until it meets the standard when there are large particles of impurities remaining on the upper screen, thereby enhancing the screening and separation effect of large impurities; when there are small particles of impurities remaining on the lower screen, it increases the vibration frequency to improve the ability to clean fine impurities; when all screening indicators of the upper and lower screens meet the standards, it gradually reduces the vibration frequency to achieve energy-saving and loss-reducing operation. If the screening residue cannot be eliminated even when the vibration frequency of the screen bed is adjusted to the upper limit, it is determined that the current feed load exceeds the screening processing capacity, a screening failure flag is generated and fed back to the outer loop adjustment stage; Specifically, a priority strategy is adopted to ensure the effect of the upper sieve (large particle residue rate) first, and then to ensure the effect of the lower sieve (small particle residue rate); when both the upper and lower sieves meet the standards and the frequency is higher than the preset minimum value, the frequency is reduced to reduce energy consumption. The control rules are as follows:

[0055] Step S6: Limit judgment of the actuator; Inner loop parallel processing and the following outer loop feed regulation via saturation flag Establish one-way data communication; Saturation detection is performed in parallel with the screening inner loop adjustment after the air classifier inner loop adjustment is completed; that is, at the end of each parallel processing cycle of the inner loop, it is checked whether the shared actuator has reached the limit of the physical parameter range, including the dust collector fan speed. and partition opening If so, and the current impurity level Then set Otherwise, it is 0; Saturation flag The detection results are transmitted to the outer ring feed adjustment stage as one of the triggering conditions for feed adjustment; Specifically, define the saturation indicator for dust collector fans. and partition saturation mark as follows:

[0056]

[0057] in, This is an indicator function; it takes the value 1 when the condition inside the parentheses is true, and 0 otherwise. The preset limit threshold (usually taken as full range) This is used to avoid frequent misjudgments caused by numerical fluctuations; These are the minimum and maximum allowable speeds of the dust collector fan, respectively. [0, 1] represents the opening degree of the partition, where 0 indicates that the front settling chamber is fully open and 1 indicates that the rear settling chamber is fully open; When the dust collector fan speed approaches its upper limit ( or close to the lower limit ( )hour, This indicates that the dust removal fan has reached or is close to its physical limit. When the partition opening approaches the upper limit ( or close to the lower limit （ ） hour, This indicates that the partition has reached or is close to its physical limit; The limit threshold can avoid frequent saturation misjudgments caused by measurement noise or numerical calculation errors, thereby improving the robustness of the system. The update rule for the saturation flag is as follows:

[0058] When any shared actuator (such as a dust collector fan or baffle) reaches or approaches its physical limit, and the current final impurity content... Higher than the target value When the saturation flag is set to 1; When the above saturation flag After the signal is transmitted to the outer ring feed adjustment stage, the outer ring will immediately trigger a feed reduction (no waiting time required). This will reduce the system load in a timely manner and prevent the cleaning quality from failing to meet standards for a long period of time. If the shared actuator is not saturated or the impurity content has reached the standard, the saturation flag is 0, and the outer ring feed adjustment stage will determine whether to adjust the feed according to its own normal rules. Step S7: Adjust the outer ring feed. The outer ring feed adjustment cycle is much longer than the inner ring parallel processing cycle, i.e. This is to avoid interference between the inner and outer rings; With slow cycle Execute on a schedule, input Limiting output feed motor speed adjustment The outer ring feed adjustment is read during each run. As one of the triggering conditions; if and This immediately triggers a reduction in feed, without requiring a waiting time. ; The outer ring feed adjustment prioritizes finished product cleaning quality while also considering equipment throughput. It only adjusts the overall machine feed rate and does not replace the specific adjustments for each inner ring. Increased production is only considered if the final impurity content meets the standard; if the impurity content exceeds the standard, the load is reduced first. When the finished product impurity content exceeds the standard for an extended period, or when the actuators of each inner ring are saturated and the operating conditions are not up to standard, the system reduces the feed rate to decrease the material load. When the finished product cleaning quality meets the standard, the equipment throughput does not reach the target value, and each actuator has adjustment margin, the feed rate is appropriately increased to improve equipment capacity. Specifically, the rules for updating the cumulative time exceeding the limit are set as follows:

[0059] The aforementioned cumulative time exceeding the limit is used to filter out short-term disturbances; only when the impurity content continues to exceed the limit for more than the waiting time will the exception be applied. T wait The feed reduction is triggered only when the feed adjustment rule is set; the feed adjustment rule uses the following "OR" relationship for dual triggering:

[0060] To prevent the feed opening from exceeding the physical range of the actuator, the calculation results are limited as follows:

[0061] If the impurity content exceeds the standard for an extended period beyond the waiting time, or if the shared actuator is saturated, reduce the feed motor speed and decrease the system load. If the impurity content meets the standard but the processing volume is insufficient, the feed motor speed can be increased tentatively. If the shared actuators are saturated, the step size is halved, and production is increased conservatively. The feed motor speed is always limited to Within the range; Step S8: Closed-loop iteration; After the single inner loop parallel processing and / or outer loop feed adjustment are completed, the machine automatically returns to step S2 and continues to cycle, enabling the wind-screen seed cleaner to adapt to different material states and load fluctuations in order to maintain stable cleaning performance in the long term.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An intelligent wind-screen seed cleaning and control system, characterized in that: It consists of a controller, an actuator, and a sensing and detection unit; The controller is used to receive data and status information collected by the sensing and detection unit, and control the action coordination and operation status of the actuator through instructions based on the hierarchical algorithm, so as to realize the adaptive adjustment and collaborative optimization of various parameters in the cleaning process; The sensing and detection unit includes: The first visual recognition unit, located at the outlet of the front settling chamber, is used to acquire images of the outlet in real time and identify whether good seeds have been extracted based on a deep learning algorithm. The output data of the first visual recognition unit is... ; The second vision recognition unit, located at the feed inlet of the lower screen, is used to detect whether large impurities are still present in the remaining material after screening by the upper screen. The output data of the second vision recognition unit is the large particle residue rate. ; The third visual recognition unit, located at the outlet of the lower sieve cleaned seeds, is used to detect whether small impurities are still present in the cleaned seeds. The output data of the third visual recognition unit is the small particle residue rate. ; The fourth visual recognition unit, located at the outlet of the rear settling chamber, is used to acquire images of the outlet in real time and identify whether good seeds have been extracted based on a deep learning algorithm. The output data of the fourth visual recognition unit is... ; The fifth visual recognition unit, located at the final outlet, is used to detect the cleaned seeds and output the final impurity content. The actual output processing capacity of the equipment is .

2. The intelligent air-screen seed cleaning and control system according to claim 1, characterized in that: The controller is preferably a PLC or an embedded control system.

3. The intelligent air-screen seed cleaning and control system according to claim 1, characterized in that: The aforementioned executing mechanism includes, The front air separation actuator, located in the front air intake duct, includes a mechanism for adjusting the width of the front air intake duct. Front air intake duct width adjustment device, used to adjust the opening of the front pressure regulating door. The front air intake duct pressure regulating device; Set in the screening system to adjust the vibration frequency of the screen box. The screen box vibration frequency adjustment device simultaneously controls the synchronous operation of the upper and lower screens and adjusts the operating status and parameters. The rear air separation actuator, located in the rear air intake duct, includes a mechanism for adjusting the height of the rear air intake duct. The rear air intake height adjustment device is used to adjust the opening of the rear pressure regulating door. The rear air intake duct pressure regulating device; Located between the front and rear settling chambers, it is used to adjust the opening of the partition. A baffle opening adjustment device for adjusting the air volume distribution between the front and rear settling chambers; And, for adjusting the speed and operating parameters of the dust collector fan. A dust collector fan speed regulating device for adjusting the total air volume.

4. The intelligent air-screen seed cleaning control method using the intelligent air-screen seed cleaning control system as described in any one of claims 1 to 3, characterized in that: The process follows a logical sequence of data acquisition, inner-loop parallel processing, outer-loop timed processing, and closed-loop iteration to achieve automatic control of the entire cleaning process. The inner and outer loops operate independently in parallel, communicating unidirectionally via a saturation flag and adjusting their step size according to preset values. Based on a multi-objective optimization model, a two-level strategy of autonomous priority and collaborative supplementation is adopted to solve for the optimal control parameters of the air separation coupling. The adjustment amount output by each processing step is monitored in real time and applied to the actuators after the air-screen cleaning operation. When the state result changes, the system re-enters the data acquisition stage, forming a closed-loop control.

5. The intelligent wind-screen seed cleaning and control method according to claim 4, characterized in that: The following implementation process is included. Step S1: Device initialization; The control system performs overall machine initialization. The controller performs self-test and initializes each actuator to a preset initial state, sets control parameters, physical range and adjustment step size, and initializes state variables. After initialization, the controller reads the preset target parameters; If the actuator is configured to adjust the external negative pressure source, the controller synchronously reads the initial operating speed and operating parameters of the external negative pressure source. If the external negative pressure source does not have an adjustment function, then It does not participate in the following control logic operations; Step S2: Automatic sampling and image acquisition; After the equipment is running, it automatically acquires the sampling data of the visual recognition unit according to the preset cycle, so as to obtain image data that can reflect the front air classification, screening, rear air classification and finished product discharge status through multi-station continuous sampling and shooting. Step S3: Image recognition and state quantity generation; The host computer preprocesses and intelligently recognizes the acquired images, and quantifies and outputs the operating status parameters of each actuator. Step S4: Evaluation of cleaning effect; The controller classifies and judges the overall cleaning effect of the machine based on the operating status parameters; Step S5: Parallel processing of the inner loop; This includes independent, parallel processing stages for wind selection and screening, enabling rapid cycle times. Continuously run to perform the following parallel processing on the collected data; The wind separation stage includes front wind separation control processing, rear wind separation control processing, and front-rear wind separation coordinated control processing steps; among them, the front wind separation control processing and the rear wind separation control processing are executed in parallel, and after the two are completed, a unified judgment is made on whether the front-rear wind separation coordinated control processing needs to be executed. The screening and air-selection stages are executed in parallel. During this stage, input... Output vibration frequency adjustment amount ; Step S6: Limit judgment of the actuator; Inner loop parallel processing and the following outer loop feed regulation via saturation flag Establish one-way data communication; Saturation detection is performed in parallel with the screening inner loop adjustment after the air classifier inner loop adjustment is completed; that is, at the end of each parallel processing cycle of the inner loop, it is checked whether the shared actuator has reached the limit of the physical parameter range, including the dust collector fan speed. and partition opening If so, and the current impurity level Then set Otherwise, it is 0; Saturation flag The detection results are transmitted to the outer ring feed adjustment stage as one of the triggering conditions for feed adjustment; Step S7: Adjust the outer ring feed. The outer ring feed adjustment cycle is much longer than the inner ring parallel processing cycle, i.e. This is to avoid interference between the inner and outer rings; With slow cycle Execute on a schedule, input Limiting output feed motor speed adjustment The outer ring feed adjustment is read during each run. As one of the triggering conditions; if and This immediately triggers a reduction in feed, without requiring a waiting time. ; Step S8: Closed-loop iteration; After the single inner loop parallel processing and / or outer loop feed adjustment are completed, the machine automatically returns to step S2 and continues to cycle, enabling the wind-screen seed cleaner to adapt to different material states and load fluctuations in order to maintain stable cleaning performance in the long term.

6. The intelligent air-screen seed cleaning control system and method according to claim 5, characterized in that: In step S2, the collected data includes images of the front settling chamber outlet. Image of the outlet of the settling chamber Image of material after screening Image of the sieved seeds exiting the sieve Final export image ; The state variables obtained after preprocessing are: the state of the front settling chamber. Post-settlement chamber status Large particle residue rate Small particle residue rate Final impurity .

7. The intelligent wind-screen seed cleaning control system and method according to claim 5, characterized in that: Step S3 includes the seed loss status in the pre-sedimentation chamber. Seed loss status in the post-settling chamber The state of residual large particles on the upper screen, the state of residual small particles on the lower screen, the type of impurities at the rear outlet, and the impurity content of the finished product at the main outlet. .

8. The intelligent air-screen seed cleaning control system and method according to claim 5, characterized in that: In step S4, when At that time, it was determined that the front suction force was too strong, which could lead to the accidental aspiration and loss of good seeds; when At that time, it was determined that the suction force was too strong, which could lead to the accidental aspiration and loss of good seeds; when or Furthermore, if the residual impurities in the material exceed the standard, it is determined that the suction power at the corresponding location is insufficient; When the residual impurities on the upper and lower screens exceed the standard, the screening effect is deemed insufficient. when When the finished product is found to have an excessive impurity rate, the impurities are uniformly classified into air-separated impurities and screened impurities, providing a basis for precise adjustment at each stage.

9. The intelligent air-screen seed cleaning control system and method according to claim 5, characterized in that: Step S5 includes, Step S5.1: Adjust the inner ring of the front air intake; The controller is based on the seed loss status in the front settling chamber. Based on the front airflow identification results, independently adjust the width of the front air intake duct and the opening of the front pressure regulating door; when If the front exhaust system's impurity removal effect is insufficient, execute the enhanced front suction operation; when When there is excessive seed loss, the front suction operation is reduced; when the front air separation and impurity removal effect meets the standard and there is no seed loss, the parameters of the current front air separation actuator remain unchanged, so that the front suction is stable in the optimal working range. Step S5.2: Adjust the inner ring of the rear air separator; The controller is based on the seed loss status in the rear settling chamber. The rear exhaust manifold and the finished product impurity status at the main exhaust port can be independently adjusted, as can the height of the rear suction hood and the opening of the rear pressure regulating door. when Furthermore, if the removal of light impurities in the later stage is insufficient, an enhanced suction operation is performed; when When there is excessive seed loss, the suction operation is reduced; when the rear air separation meets the standards and there is no seed loss, the parameters of the current rear air separation actuator remain unchanged. Step S5.3: Coordinated adjustment of front and rear air separation; By the opening of the partition To achieve dynamic air volume distribution in dual air chambers, the coupling interference between front and rear air selection is offset by adjusting the air volume distribution. Air volume distribution satisfies the following formula: , ; in, For the air volume of the pre-settlement chamber, For the air volume of the post-settlement chamber, This refers to the characteristic coefficient of the dust collector fan. These are the operating parameters for the external negative pressure source. This refers to the normalized opening parameter of the partition; Step S5.4: Joint optimization and coordinated adjustment of air separation; If the aforementioned coordinated adjustment of the pre- and post-wind separation is within the preset time... It is still impossible to achieve internally. , When the system reaches a stable state, the control system initiates the following wind separation joint optimization and coordinated adjustment: The primary goal is to minimize the loss of good seeds due to accidental aspiration, while the secondary goal is to improve the impurity removal effect of air separation. Global optimization and correction are performed on all parameters of the front and rear air separation to solve the problem that it is difficult to achieve steady-state standards through repeated adjustments of a single mechanism. Define the following multi-objective optimization function: Solve the optimization problem: The optimal control parameters are solved online using an optimization algorithm. Step S5.5: Filter inner loop adjustment; The inner ring adjustment of the screening and the inner ring adjustment of the air separation are performed in parallel, and the vibration frequency of the screen box is adjusted independently during the screening stage. ; Based on the monitoring results of the material residue on the upper and lower screens, the controller increases the vibration frequency of the screen bed until it meets the standard when there are large particles of impurities remaining on the upper screen, thereby enhancing the screening and separation effect of large impurities; when there are small particles of impurities remaining on the lower screen, it increases the vibration frequency to improve the ability to clean fine impurities; when all screening indicators of the upper and lower screens meet the standards, it gradually reduces the vibration frequency to achieve energy-saving and loss-reducing operation. If the screening residue cannot be eliminated even when the vibration frequency of the screen bed is adjusted to the upper limit, it is determined that the current feed load exceeds the screening processing capacity, a screening failure flag is generated and fed back to the outer loop adjustment stage.

10. The intelligent air-screen seed cleaning control system and method according to claim 5, characterized in that: In step S6, the saturation flag of the dust collector fan is defined. and partition saturation mark as follows: in, This is an indicator function; it takes the value 1 when the condition inside the parentheses is true, and 0 otherwise. The preset limit threshold is used to avoid frequent misjudgments caused by numerical fluctuations. These are the minimum and maximum allowable values ​​for the fan speed, respectively. The partition opening is 0, which indicates that the forward settling chamber is fully open, and 1 indicates that the rear settling chamber is fully open. When the dust collector fan speed approaches its upper limit ( or close to the lower limit ( )hour, This indicates that the dust removal fan has reached or is close to its physical limit. When the partition opening approaches the upper limit ( or close to the lower limit ( ） hour , This indicates that the partition has reached or is close to its physical limit; This is the limit threshold; The update rule for the saturation flag is as follows: When any shared actuator reaches or approaches its physical limit, and the current final impurity level... Higher than the target value When the saturation flag is set to 1; When the above saturation flag After being transmitted to the outer ring feed adjustment stage, the outer ring will immediately trigger a reduction in feed. If the shared actuator is not saturated or the impurity content has reached the standard, the saturation flag is 0, and the outer ring feed adjustment stage will determine whether to adjust the feed according to its own normal rules.

Images