Collaborative control method and system for paddy cleaning and screening equipment

Abstract

The application discloses a collaborative control method and system for rice cleaning and screening equipment, and relates to the technical field of intelligent control of grain processing equipment, and comprises the following steps: acquiring the changes of feeding quality, the changes of material coverage on the screen surface and the changes of vibration frequency during the continuous operation of the rice cleaning and screening equipment, constructing a dynamic change trajectory in chronological order, extracting the coverage increase corresponding to each sudden increase of feeding, and generating pulse change characteristic information.The application acquires the changes of feeding quality, the changes of material coverage on the screen surface and the changes of vibration frequency, constructs pulse change characteristic information, adjusts the vibration frequency change rate in combination with the rhythm mapping relationship, optimizes the feeding release rhythm according to the residence distribution state, realizes the coordinated control of the vibration process and the material change, suppresses the alternating phenomenon of material deposition and dispersion on the screen surface, and improves the stability of the screening process.

Description

Technical Field

[0001] This invention relates to the field of intelligent control technology for grain processing equipment, specifically to a collaborative control method and system for rice cleaning and screening equipment. Background Technology

[0002] Collaborative control for rice cleaning and screening equipment refers to constructing a unified control mechanism around multiple functional units involved in the entire process of rice cleaning and screening (including feeding mechanism, vibrating screen body, air separation system, impurity separation device, and discharge channel, etc.). This mechanism establishes an interrelationship and dynamic response among the various actuators in terms of time rhythm, operating parameters, and material state. Its core is no longer limited to the independent adjustment of a single device, but rather based on changes in rice flow rate, impurity content fluctuations, and particle size distribution characteristics, it involves the coordinated adjustment of key parameters such as vibration frequency, air volume intensity, screen inclination angle, and conveying speed. This creates a continuous matching and state-coupled operating pattern between different processing stages, thereby achieving overall optimization of impurity separation efficiency, screening accuracy, and processing capacity, while avoiding problems such as local overload, material accumulation, or sorting imbalance.

[0003] The existing technology has the following shortcomings: During the operation of rice cleaning and screening equipment, when the feed flow rate fluctuates in a pulsed manner, the equipment vibration rhythm fails to match this changing rhythm in time, resulting in a dynamic imbalance in the material distribution on the screen surface. At this time, material accumulation occurs in local areas of the screen surface due to the instantaneous increase in feed, leading to a rapid increase in the material layer thickness. Subsequently, during the feed reduction phase, the vibration action quickly disperses the accumulated material and transports it forward, thus forming a periodic accumulation-dispersion alternation phenomenon. These changes disrupt the original stable screening trajectory, making it difficult for some impurities to pass through the screen when the material layer is too thick. At the same time, some unscreened material is prematurely carried away from the screen surface during the dispersion phase, leading to a sharp decrease in screening accuracy. In severe cases, a large amount of unscreened impurities may directly enter the finished product area, affecting the final product quality.

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a collaborative control method and system for rice cleaning and screening equipment to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a collaborative control method for rice cleaning and screening equipment, comprising the following steps:

[0007] The changes in feed quality, screen material coverage, and vibration frequency during the continuous operation of the rice cleaning and screening equipment are obtained. A dynamic change trajectory is constructed in chronological order. The increase in coverage corresponding to each sudden increase in feed is extracted to generate pulse change feature information.

[0008] For each increase in coverage rate in the pulse change feature information, the change span between two adjacent increases in coverage rate is calculated. Multiple vibration adjustment intervals are divided according to the change span, and a corresponding vibration frequency change rate is configured for each vibration adjustment interval to construct a rhythm mapping relationship.

[0009] Based on the rhythm mapping relationship, the vibration frequency change rate is adjusted segment by segment in each vibration adjustment interval. At the same time, the material residence time corresponding to the front, middle and rear sections of the screen is statistically analyzed, and the material residence time at each position is arranged to generate a dynamic distribution map, forming a residence distribution state.

[0010] Calculate the difference ratio between the material residence time in the front, middle and rear sections of the screen based on the residence distribution state, adjust the feeding release interval at each time according to the difference ratio, change the continuous release mode to the time-sharing release mode, and output the cycle rhythm adjustment scheme.

[0011] Based on the rhythm adjustment scheme, the vibration frequency change rate corresponding to each time release stage is continuously corrected until the fluctuation amplitude of the material coverage rate corresponding to the adjacent release stage is within the preset percentage range, so as to suppress the periodic accumulation and scattering of material on the screen surface and improve the screening stability.

[0012] Preferably, the steps for generating pulse change feature information are as follows:

[0013] The changes in feed quality, screen surface material coverage, and vibration frequency during the continuous operation of the rice cleaning and screening equipment are obtained and arranged in chronological order as a dynamic change trajectory.

[0014] Based on the dynamic change trajectory, identify the sudden rise time points in the change of feed quality, and extract the data on the change of screen surface material coverage before and after the corresponding time point;

[0015] The difference in the material coverage rate change data of the screen surface corresponding to the time node of sudden increase in feed is calculated as the coverage rate increase, and arranged into a set of continuous changes in time order;

[0016] By combining the continuous change set for overall aggregation, the correspondence between changes in feed quality, changes in screen material coverage, and changes in vibration frequency is retained, and pulse change characteristic information is generated.

[0017] Preferably, the rhythm mapping relationship is constructed as follows:

[0018] Select the coverage increase rate arranged in chronological order from the pulse change feature information, form a continuous relationship unit from two adjacent coverage increase rate increases, and record the difference value as the change span.

[0019] The overall range is sorted according to the range of change, and the range of change is divided into multiple continuous range segments according to the numerical distribution. A start boundary and an end boundary are set for each range segment, and multiple vibration adjustment intervals are divided.

[0020] The variation span and vibration frequency change rate are configured for the corresponding vibration adjustment range, so that the variation span within the same vibration adjustment range corresponds to the same vibration frequency change rate.

[0021] The correspondence between vibration adjustment intervals and vibration frequency change rates is summarized and arranged in a unified order to construct a rhythm mapping relationship.

[0022] Preferably, after arranging the variation spans in ascending order of numerical value, the variation spans are divided into multiple range segments, and a start boundary and an end boundary are set for each range segment. Each range segment corresponds to a vibration adjustment interval, and the vibration frequency change rate is configured step by step according to the hierarchical order of the vibration adjustment intervals.

[0023] Preferably, the steps for forming the residence distribution state are as follows:

[0024] In the matching rhythm mapping relationship, the vibration adjustment interval and the vibration frequency change rate are matched, and the change span corresponding to each time node is matched with the vibration adjustment interval and the vibration frequency change rate is switched.

[0025] Divide the screen into front, middle and rear sections, record the time nodes when the material enters the front section, leaves the front section and enters the middle section, and leaves the middle section and enters the rear section, and obtain the residence time.

[0026] The durations of the first, middle, and last segments of each time point are combined and arranged in chronological order to form a continuous unfolding structure.

[0027] The dwell times of the front, middle and rear sections in the continuously unfolded structure are integrated and arranged by time to form a dwell distribution state.

[0028] Preferably, the dwell time combinations are arranged in chronological order as a continuous unfolding structure, and the dwell time of each time node is arranged in the horizontal direction of time, namely the first dwell time, the middle dwell time, and the last dwell time, so that the first, middle, and last dwell times form a corresponding change trajectory.

[0029] The preferred steps for outputting the beat allocation scheme are as follows:

[0030] Extract the duration of the first segment, the duration of the middle segment, and the duration of the last segment corresponding to each time node in the dwell distribution state, and calculate the difference ratio;

[0031] Map the difference ratio to the feed release interval, adjust the feed release interval at each time point, and generate a distribution of changing intervals;

[0032] The arrangement of the intervals is changed and the continuous interval structure is formed in chronological order, which transforms the continuous release mode into a time-sharing release mode;

[0033] Integrate the relationship between the release interval and the difference ratio of each time segment in the time-sharing release method, and output the beat allocation scheme.

[0034] Preferably, the continuous interval structure is divided into multiple time segments in chronological order, with each time segment having a consistent release interval, and a corresponding relationship is established between the release interval of each time segment and the difference ratio of the corresponding time node.

[0035] Preferably, the step of continuously correcting the rate of change of vibration frequency is as follows:

[0036] Read the start time, duration and feeding release interval of each time-sharing release stage in the cycle rhythm allocation scheme, and introduce the vibration frequency change rate according to the corresponding rhythm mapping relationship;

[0037] Record the screen material coverage values ​​at the start and end times of each time-sharing release stage and calculate the coverage change. Arrange the coverage changes of adjacent release stages to generate fluctuation amplitude.

[0038] The vibration frequency change rate of each time-sharing release stage is adjusted segment by segment based on the fluctuation amplitude, and the vibration rhythm within each stage is updated.

[0039] Track the fluctuation amplitude of material coverage in adjacent release stages, and keep the vibration frequency change rate stable when the fluctuation amplitude is within a preset percentage range.

[0040] A collaborative control system for rice cleaning and screening equipment includes a pulse feature extraction module, a rhythm mapping module, a residence distribution analysis module, a feed cycle timing module, and a dynamic collaborative control module.

[0041] The pulse feature extraction module acquires the changes in feed quality, screen material coverage, and vibration frequency during the continuous operation of the rice cleaning and screening equipment. It constructs a dynamic change trajectory in chronological order and extracts the increase in coverage corresponding to each sudden increase in feed to generate pulse change feature information.

[0042] The rhythm mapping module calculates the span between two adjacent coverage increases in the pulse change feature information, divides multiple vibration adjustment intervals according to the span, and configures the corresponding vibration frequency change rate for each vibration adjustment interval to construct a rhythm mapping relationship.

[0043] The residence distribution analysis module adjusts the vibration frequency change rate segment by segment in each vibration adjustment interval based on the rhythm mapping relationship. At the same time, it counts the material residence time corresponding to the front, middle and rear sections of the screen and arranges the material residence time at each position to generate a dynamic distribution map, forming the residence distribution status.

[0044] The feeding cycle timing module calculates the ratio of the difference between the material residence time in the front, middle and rear sections of the screen based on the residence distribution state, adjusts the feeding release interval at each time according to the ratio of the difference, changes the continuous release mode to the time-sharing release mode, and outputs the cycle timing timing scheme.

[0045] The dynamic collaborative control module continuously corrects the rate of change of vibration frequency corresponding to each time-sharing release stage according to the rhythm allocation scheme, until the fluctuation amplitude of material coverage rate corresponding to adjacent release stages is within the preset percentage range, so as to suppress the periodic accumulation and scattering of material on the screen surface and improve the screening stability.

[0046] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0047] This invention collects data on changes in feed quality, material coverage on the screen surface, and vibration frequency, and constructs pulse change characteristic information. This enables the equipment to identify the impact of feed fluctuations on the state of the material on the screen surface. At the same time, it adjusts the rate of change of vibration frequency according to the rhythm mapping relationship, so that the vibration rhythm can match the changes in feed, thereby reducing the alternating phenomenon of local material accumulation and rapid dispersion on the screen surface and maintaining the continuous and stable operation of the screening process.

[0048] This invention establishes a residence distribution state and adjusts the feeding and release interval according to the differences in material residence time in different areas, transforming the continuous feeding mode into a time-sharing release mode. This allows for coordinated control of the material distribution on the screen surface. Simultaneously, combined with continuous correction of the vibration frequency change rate, the fluctuation amplitude of the material coverage on the screen surface is kept within a preset range, thereby improving the impurity separation effect and enhancing the final screening quality. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0050] Figure 1 This is a flowchart of the collaborative control method for rice cleaning and screening equipment according to the present invention.

[0051] Figure 2 This is a schematic diagram of the modules of the collaborative control system for rice cleaning and screening equipment of the present invention. Detailed Implementation

[0052] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art.

[0053] This invention provides, for example Figure 1 The collaborative control method for rice cleaning and screening equipment shown includes the following steps:

[0054] The changes in feed quality, screen material coverage, and vibration frequency during the continuous operation of the rice cleaning and screening equipment are obtained. A dynamic change trajectory is constructed in chronological order. The increase in coverage corresponding to each sudden increase in feed is extracted to generate pulse change feature information.

[0055] During the operation of rice cleaning and screening equipment, in order to continuously characterize and uniformly express changes in feed quality, screen surface material coverage, and vibration frequency, it is necessary to construct a dynamic change trajectory that reflects the time evolution relationship. Based on this, the correspondence between sudden increases in feed and changes in coverage should be identified, and pulse change feature information that can characterize the feed fluctuation characteristics should be extracted. This provides a continuous and correlated state basis for subsequent rhythm control. The specific steps are as follows:

[0056] During continuous operation, changes in feed quality, screen material coverage, and vibration frequency are recorded synchronously. Feed quality changes are continuously marked as the mass value of material entering the screening area per unit time, with each time point corresponding to a specific mass value. Screen material coverage changes are expressed as the proportion of the screen surface occupied by material. The screen surface is divided into multiple continuous areas, and the material coverage of each area is recorded in real time, which is then converted into the overall coverage ratio. Vibration frequency changes are recorded hourly as the vibration frequency values ​​of the equipment at each time point.

[0057] The above three types of data are collected at a uniform time interval. Each time interval corresponds to a combination of data on feed quality, coverage, and vibration frequency. These combination data are arranged in chronological order to form a continuous connection between each time point, thus forming a complete dynamic change trajectory. At any point in time in this trajectory, the corresponding status of feed state, screen surface state, and vibration state can be reflected simultaneously.

[0058] After forming a continuous dynamic trajectory, the local fluctuations in the trajectory are identified by taking the change in feed quality as the starting point. Specifically, when the feed quality value at a later time point suddenly increases compared to the previous time point, the time point is marked as the point where the feed surge occurs, and the specific time position of the surge is recorded. Then, the change in the screen material coverage rate corresponding to the time position is located in the dynamic trajectory, and the coverage rate data of the two time points before and after the surge are extracted, so that the surge in feed quality and the change in coverage rate form a one-to-one correspondence in the time dimension.

[0059] As multiple feed surge events were identified and recorded one by one, their distribution in the dynamic change trajectory showed discrete characteristics with unequal intervals. These discrete characteristics provided a clear time reference for the subsequent fine characterization of the coverage increase.

[0060] After marking the locations of feed surges, a description of the differences in coverage changes is developed around each surge point. The coverage value before the surge occurs is compared with the coverage value after the surge occurs, and the difference between the two is calculated. This difference is defined as the coverage increase for the corresponding feed surge event. The coverage increases corresponding to different time points are arranged in chronological order, so that these increase values ​​form a continuous set of changes. This set not only records the degree of coverage change caused by each feed surge, but also shows the difference in response magnitude between different surge events.

[0061] As time goes by, the distribution of the coverage increase in the dynamic change trajectory shows fluctuating characteristics. This characteristic reflects the response process of the material state on the screen surface to the fluctuation of the feed, thus integrating the originally scattered coverage changes into a set of increases with a unified expression.

[0062] After the coverage increase set is formed, the coverage increase corresponding to each time node is collected as a whole according to the original time order, so that all feed surge events maintain the original arrangement relationship in the time dimension, and thus construct complete pulse change feature information.

[0063] In this pulse change feature information, each increase value corresponds to a sudden increase in feed, and it exhibits a combination of interval distribution and amplitude variation in the overall sequence, so that the feed fluctuation in different time periods can be expressed in a unified form. At the same time, the correspondence between feed quality changes, coverage changes and vibration frequency changes is preserved in this feature information, so that the correlation between various state data is not separated, thus providing continuous, complete and time-correlated input information for the subsequent coordinated control process around vibration frequency adjustment and feed rhythm adjustment.

[0064] For each increase in coverage rate in the pulse change feature information, the change span between two adjacent increases in coverage rate is calculated. Multiple vibration adjustment intervals are divided according to the change span, and a corresponding vibration frequency change rate is configured for each vibration adjustment interval to construct a rhythm mapping relationship.

[0065] Given that the pulse variation characteristic information has been constructed, in order to transform the coverage increase into a directional vibration regulation basis, it is necessary to refine the relationship between the changes in coverage increases, and on this basis, establish a corresponding relationship between the change span and the vibration frequency change rate, so that the vibration rhythm has the ability to adjust with changes in coverage. The specific steps are as follows:

[0066] Based on the coverage rate increases arranged in chronological order in the pulse change feature information, the changes between two adjacent coverage rate increases are characterized one by one. The coverage rate increase corresponding to the previous time node and the coverage rate increase corresponding to the next time node are formed into a pair of continuous relation units. The specific values ​​of the two coverage rate increases are recorded in each continuous relation unit, and the difference between the two values ​​is quantified and expressed as the change span.

[0067] As time progresses, all adjacent coverage increases are combined in pairs and their differences are expressed, so that the span of change forms a continuous distribution pattern in the overall time dimension. This distribution not only reflects the fluctuations of coverage increase at different time positions, but also shows the degree of connection between adjacent fluctuations, so that the coverage increase changes from a discrete state to a chain of changes with continuous connection, thus providing a complete span data source for subsequent division of vibration adjustment intervals.

[0068] For the established distribution of variation spans, the position of each variation span within the overall range is sorted and expressed. All variation spans are rearranged in ascending order of value, so that the variation spans form an ordered structure from low to high in the numerical dimension. In this ordered structure, according to the distribution of intervals between variation spans, variation spans with adjacent values ​​are grouped into the same range segment, and clear start and end boundaries are set for each range segment, thereby dividing the entire variation span range into multiple interconnected vibration adjustment intervals.

[0069] Each vibration adjustment interval is numerically non-overlapping and fully covered, so that any range of change can be classified into one of the intervals. As the intervals are divided, the range of change of different coverage rates is structurally assigned to different levels, so that the vibration adjustment intervals have a clear hierarchical relationship and range definition.

[0070] After the vibration adjustment intervals are defined, a correspondence is established between the vibration frequency change rate and each vibration adjustment interval. This ensures that the change span within the same vibration adjustment interval corresponds to the same vibration frequency change rate expression. In this correspondence process, the vibration frequency change rate is specifically described by the amount of vibration frequency change per unit time, and is configured step by step according to the hierarchical order of the vibration adjustment intervals. This ensures that changes in the coverage of different intervals can trigger vibration frequency change rates of different amplitudes.

[0071] Once all vibration adjustment intervals have completed rate configuration, a stable correspondence is established between the change span and the vibration frequency change rate. This allows any change in coverage increase at any given time point to be matched with the specific vibration frequency change rate through its corresponding change span, thereby achieving a directional conversion from coverage change to vibration adjustment behavior.

[0072] After establishing the correspondence between vibration adjustment intervals and vibration frequency change rates, all intervals and their corresponding rates are organized and expressed as a whole. The span range of each vibration adjustment interval and its corresponding vibration frequency change rate are arranged in a unified order, so that the correspondence between the change span, vibration adjustment interval, and vibration frequency change rate forms a complete rhythmic mapping relationship. This rhythmic mapping relationship takes the change span as the input basis, receives the coverage increase change from the pulse change feature information at the input end, and gives the corresponding vibration frequency change rate at the output end, so that the vibration rhythm can be dynamically matched with the rhythm of the coverage change.

[0073] Meanwhile, each vibration adjustment interval maintains a continuous connection in the rhythm mapping relationship, so that the rate of change of vibration frequency presents a transitional relationship between different intervals, thereby ensuring that the vibration rhythm remains consistent during the evolution of time, and ultimately achieving fine-tuning of the rhythm of the screening process.

[0074] Based on the rhythm mapping relationship, the vibration frequency change rate is adjusted segment by segment in each vibration adjustment interval. At the same time, the material residence time corresponding to the front, middle and rear sections of the screen is statistically analyzed, and the material residence time at each position is arranged to generate a dynamic distribution map, forming a residence distribution state.

[0075] Given that the rhythm mapping relationship has been established, the vibration rhythm corresponding to the change in coverage needs to be expanded segment by segment during operation. Combined with the material movement trajectory at different positions on the screen surface, the material residence status is continuously characterized, thereby forming a residence distribution state that can reflect the spatial distribution and temporal evolution of the material. The specific steps are as follows:

[0076] By mapping the clearly defined vibration adjustment intervals and vibration frequency change rates in the rhythm mapping relationship to the actual running time axis, each time node can be matched with a specific vibration adjustment interval according to its corresponding change span and obtain the corresponding vibration frequency change rate expression. During the time progression, the vibration frequency change rate is switched segment by segment according to the time sequence, so that the vibration frequency exhibits a continuous rhythmic characteristic in different time segments.

[0077] Within each time interval, the vibration frequency does not remain constant, but changes continuously according to the vibration frequency change rate corresponding to that interval, so that the vibration state forms a segmented and continuous change trajectory in the time dimension. This change trajectory corresponds to the change in coverage, thus making the vibration rhythm and the material change rhythm consistent in time.

[0078] During the operation of the vibration frequency change rate, the screen surface is divided into three continuous areas along the material conveying direction: the front section, the middle section, and the rear section. At each time point, the time of material entering each area is recorded. Specifically, the time point of material entering the front section and the time point of material leaving the front section and entering the middle section are recorded. At the same time, the time point of material leaving the middle section and entering the rear section and the time point of material leaving the rear section are also recorded, so that the movement process of the same batch of material in the three areas has complete time marking.

[0079] As the rate of change of vibration frequency varies in different time intervals, the movement rhythm of the material in the three regions changes accordingly, causing the residence time of the material in the first, middle and last sections to be continuously updated, forming a point-by-point recording state in the continuous time progression, thus providing a complete data source for the expression of subsequent residence time.

[0080] After recording the material residence time at each time node in the front, middle, and rear sections, the residence times of the three regions within the same time node are combined side-by-side, so that each time node corresponds to a residence time combination consisting of three values. This combination reflects the distribution of materials in different regions at that moment. As time progresses, the residence time combinations corresponding to all time nodes are arranged in chronological order, so that these combinations form a continuous unfolding structure on the time axis. In this structure, each time position contains residence time information of the front, middle, and rear sections, thereby synchronously expressing the residence relationship between different regions in the time dimension, and presenting the distribution of materials at different positions on the screen surface in a unified form.

[0081] Based on the continuous arrangement of dwell time combinations, the combinations corresponding to all time nodes are integrated as a whole, so that the dwell time of the first, middle and last segments forms a continuously changing distribution expression throughout the entire operation cycle. In this expression, with time as the horizontal expansion direction, the dwell time combinations of each time node are arranged sequentially, so that the first, middle and last segments form three corresponding change trajectories on the time axis. These three trajectories reflect the changes in the dwell time of materials in each area, and together constitute the dwell distribution state.

[0082] This residence distribution not only shows the differences in residence time of materials in different areas, but also reflects the changing trend of these differences over time, giving the material movement pattern on the screen surface a continuously trackable expression, thus providing a direct basis for subsequent feeding rhythm adjustment based on residence differences.

[0083] Calculate the difference ratio between the material residence time in the front, middle and rear sections of the screen based on the residence distribution state, adjust the feeding release interval at each time according to the difference ratio, change the continuous release mode to the time-sharing release mode, and output the cycle rhythm adjustment scheme.

[0084] Given that the residence distribution has been fully presented, the residence differences between different areas of the screen surface need to be transformed into the basis for adjusting the feeding release rhythm. This allows the feeding behavior to be reorganized in time according to the changes in the distribution of materials on the screen surface, thereby forming a rhythmic allocation scheme with a clear time structure. The specific steps are as follows:

[0085] Based on the time-dependent changes in material dwell time in the distribution state, specifically in the front, middle, and rear sections, the dwell time corresponding to the three regions within the same time node is extracted point by point. This results in a data combination of three items for each time node, including the dwell time of the front section, the middle section, and the rear section. Within this data combination, the differences in dwell time between the front and middle sections, the middle and rear sections, and the front and rear sections are calculated. Each difference is then proportionally converted to the dwell time of the corresponding region, presenting the differences between the three regions in a unified proportional form.

[0086] As time progresses, the proportion of the difference at each time point changes over a continuous time dimension, transforming the difference in residence between different positions on the screen surface from a single point expression into a proportional distribution with temporal continuity. This proportional distribution can reflect the difference in the flow rhythm of the material on the screen surface from front to back, providing a specific numerical reference for adjusting the subsequent feeding and release rhythm.

[0087] The difference ratio formed at each time node is mapped to the feeding and releasing behavior one by one, so that the feeding and releasing interval no longer remains a fixed value on the time axis, but changes according to the difference ratio of the corresponding time node. In the specific implementation process, a corresponding release interval duration is set for each time node, so that the time interval between two adjacent feedings is adjusted with the change of the difference ratio, thereby making the feeding present an uneven distribution pattern on the time axis.

[0088] During continuous time progression, the release interval at each time node is updated point by point according to the change in the difference ratio, so that the feeding behavior presents a dynamic change rhythm throughout the entire operation cycle, and a corresponding relationship is formed between the feeding release and the difference in material residence on the screen surface, so that the feeding rhythm can change synchronously with the material distribution state.

[0089] After the feed release interval is adjusted point by point, the release intervals corresponding to all time nodes are organized as a whole. The release intervals of each time node are arranged continuously in chronological order so that these interval values ​​form a complete interval distribution structure on the time axis. In this structure, each interval value corresponds to a specific time position, so that the feed release behavior forms a distribution state with continuous time identification throughout the entire operation.

[0090] Based on this, the continuously distributed release intervals are divided into multiple continuous time segments according to their variation characteristics, so that the release intervals in each segment are expressed relatively consistently. This transforms the original continuous input form into a time-sharing release form in which multiple time segments unfold sequentially, so that the feeding behavior forms a phased unfolding structure in the time dimension.

[0091] After the time-sharing release pattern is formed, the distribution of release intervals within each time segment is integrated as a whole. The start time, duration, and corresponding release interval of each time segment are uniformly expressed so that different time segments are arranged in chronological order and maintain a consistent relationship with the difference ratio of the corresponding time nodes, thereby forming a rhythm allocation scheme.

[0092] This timing-based scheduling scheme divides the feeding release into multiple consecutive stages, with the release rhythm within each stage corresponding to the ratio of the difference between the material residence time in the front, middle, and rear sections of the screen. This allows the feeding behavior to be reconstructed in time according to changes in the residence distribution state, thereby achieving coordination and consistency between the feeding rhythm and the material distribution state during the overall operation.

[0093] Based on the rhythm adjustment scheme, the vibration frequency change rate corresponding to each time release stage is continuously corrected until the fluctuation amplitude of the material coverage rate corresponding to the adjacent release stage is within the preset percentage range, so as to suppress the alternating phenomenon of periodic accumulation and scattering of material on the screen surface and improve the screening stability.

[0094] Given that the cycle time allocation scheme has been clearly divided into multiple time-sharing release stages, in order to ensure that the rate of change of vibration frequency can continuously match the feeding rhythm of each stage, it is necessary to gradually carry out a dynamic correction process of the rate of change of vibration frequency around the time-sharing release stages, and to constrain the fluctuation amplitude of material coverage during continuous operation, thereby achieving stable control of the material state on the screen surface. The specific steps are as follows:

[0095] For each time-sharing release stage in the cycle time allocation scheme, the starting point, duration, and feeding and release interval of each stage are read item by item, and each stage is unfolded on the time axis in chronological order so that each time-sharing release stage corresponds to a clear time range.

[0096] Based on this, the vibration frequency change rate, which has been determined in the rhythm mapping relationship, is introduced into each time-sharing release stage. This ensures that each time-sharing release stage has a corresponding initial value for the vibration frequency change rate at the beginning. This initial value is loaded at the beginning of the stage and participates in the operation during the stage duration, so that the vibration frequency change rate and the feeding release rhythm form a synchronous development relationship in the time dimension. This allows the vibration rhythm and the feeding beat to establish a direct connection in each time-sharing release stage.

[0097] During the operation of each time-sharing release stage, the material coverage rate on the screen surface is continuously recorded. The coverage rate value at the beginning of each time-sharing release stage is recorded, and the corresponding coverage rate value is recorded again at the end of the stage. The change between the two values ​​is expressed as the coverage rate change within that stage. Subsequently, the coverage rate changes of two adjacent time-sharing release stages are arranged accordingly, so that the coverage rate change at the end of the previous stage and the coverage rate change corresponding to the next stage form a continuous comparison relationship. In this comparison relationship, the difference in the change range between the two stages is organized into the material coverage rate fluctuation amplitude, so that each pair of adjacent release stages forms a clear fluctuation amplitude expression, thereby constructing a continuous distribution state of coverage rate fluctuation on the time axis. The fluctuation amplitude is compared with a preset percentage range, so that the coverage rate change between each stage has a referable range definition.

[0098] Based on the fluctuation amplitude of the material coverage rate corresponding to each time-release stage, the vibration frequency change rate is modified segment by segment, so that the vibration frequency change rate in the current stage is continuously adjusted as time progresses. Specifically, during the operation of a stage, the vibration frequency change rate is directionally adjusted according to the fluctuation amplitude changes between the current stage and the adjacent stage, so that the rate changes gradually within the stage, thereby affecting the distribution rhythm of the material on the screen surface.

[0099] As each time-sharing release phase progresses sequentially, the rate of change of vibration frequency forms a continuous chain of change between multiple phases, so that the vibration rhythm of each phase is adjusted based on the previous phase, thereby causing the coverage fluctuation amplitude to gradually change between phases and continuously approach the preset percentage range during continuous operation.

[0100] During the continuous correction of the vibration frequency change rate, the fluctuation amplitude of the material coverage rate between adjacent release stages is continuously tracked and expressed. When the fluctuation amplitude between multiple consecutive time-division release stages falls within the preset percentage range, the vibration frequency change rate in the current stage is kept stable and continued to be used in subsequent stages, so that the vibration rhythm forms a stable distribution structure on the time axis.

[0101] In this state, the distribution of material on the screen surface maintains a consistent rhythm during each time-release phase, the alternation of periodic accumulation and dispersion is suppressed, and the movement of material on the screen surface exhibits a continuous and orderly change, thereby ensuring stable operation of the screening process throughout the entire operating cycle and ultimately completing the continuous correction process of the vibration frequency change rate based on the rhythm adjustment scheme.

[0102] This invention collects data on changes in feed quality, material coverage on the screen surface, and vibration frequency, and constructs pulse change characteristic information. This enables the equipment to identify the impact of feed fluctuations on the state of the material on the screen surface. At the same time, it adjusts the rate of change of vibration frequency according to the rhythm mapping relationship, so that the vibration rhythm can match the changes in feed, thereby reducing the alternating phenomenon of local material accumulation and rapid dispersion on the screen surface and maintaining the continuous and stable operation of the screening process.

[0103] This invention establishes a residence distribution state and adjusts the feeding and release interval according to the differences in material residence time in different areas, transforming the continuous feeding mode into a time-sharing release mode. This allows for coordinated control of the material distribution on the screen surface. Simultaneously, combined with continuous correction of the vibration frequency change rate, the fluctuation amplitude of the material coverage on the screen surface is kept within a preset range, thereby improving the impurity separation effect and enhancing the final screening quality.

[0104] This invention provides, for example Figure 2 The collaborative control system shown for rice cleaning and screening equipment includes a pulse feature extraction module, a rhythm mapping module, a residence distribution analysis module, a feed cycle timing module, and a dynamic collaborative control module.

[0105] The pulse feature extraction module acquires the changes in feed quality, screen material coverage, and vibration frequency during the continuous operation of the rice cleaning and screening equipment. It constructs a dynamic change trajectory in chronological order and extracts the increase in coverage corresponding to each sudden increase in feed to generate pulse change feature information.

[0106] The rhythm mapping module calculates the span between two adjacent coverage increases in the pulse change feature information, divides multiple vibration adjustment intervals according to the span, and configures the corresponding vibration frequency change rate for each vibration adjustment interval to construct a rhythm mapping relationship.

[0107] The residence distribution analysis module adjusts the vibration frequency change rate segment by segment in each vibration adjustment interval based on the rhythm mapping relationship. At the same time, it counts the material residence time corresponding to the front, middle and rear sections of the screen and arranges the material residence time at each position to generate a dynamic distribution map, forming the residence distribution status.

[0108] The feeding cycle timing module calculates the ratio of the difference between the material residence time in the front, middle and rear sections of the screen based on the residence distribution state, adjusts the feeding release interval at each time according to the ratio of the difference, changes the continuous release mode to the time-sharing release mode, and outputs the cycle timing timing scheme.

[0109] The dynamic collaborative control module continuously corrects the rate of change of vibration frequency corresponding to each time-sharing release stage according to the rhythm allocation scheme, until the fluctuation amplitude of material coverage rate corresponding to adjacent release stages is within the preset percentage range, so as to suppress the periodic accumulation and scattering of material on the screen surface and improve the screening stability.

[0110] The collaborative control method for rice cleaning and screening equipment provided in this embodiment of the invention is implemented through the aforementioned collaborative control system for rice cleaning and screening equipment. For details of the specific methods and processes of the collaborative control system for rice cleaning and screening equipment, please refer to the embodiments of the collaborative control method for rice cleaning and screening equipment described above, which will not be repeated here.

[0111] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A collaborative control method for rice cleaning and screening equipment, characterized in that, Includes the following steps: The changes in feed quality, screen material coverage, and vibration frequency during the continuous operation of the rice cleaning and screening equipment are obtained. A dynamic change trajectory is constructed in chronological order. The increase in coverage corresponding to each sudden increase in feed is extracted to generate pulse change feature information. For each increase in coverage rate in the pulse change feature information, the change span between two adjacent increases in coverage rate is calculated. Multiple vibration adjustment intervals are divided according to the change span, and a corresponding vibration frequency change rate is configured for each vibration adjustment interval to construct a rhythm mapping relationship. Based on the rhythm mapping relationship, the vibration frequency change rate is adjusted segment by segment in each vibration adjustment interval. At the same time, the material residence time corresponding to the front, middle and rear sections of the screen is statistically analyzed, and the material residence time at each position is arranged to generate a dynamic distribution map, forming a residence distribution state. Calculate the difference ratio between the material residence time in the front, middle and rear sections of the screen based on the residence distribution state, adjust the feeding release interval at each time according to the difference ratio, change the continuous release mode to the time-sharing release mode, and output the cycle rhythm adjustment scheme. Based on the rhythm adjustment scheme, the rate of change of vibration frequency corresponding to each time-sharing release stage is continuously corrected until the fluctuation amplitude of material coverage corresponding to adjacent release stages is within the preset percentage range.

2. The collaborative control method for rice cleaning and screening equipment according to claim 1, characterized in that, The steps for generating pulse change feature information are as follows: The changes in feed quality, screen surface material coverage, and vibration frequency during the continuous operation of the rice cleaning and screening equipment are obtained and arranged in chronological order as a dynamic change trajectory. Based on the dynamic change trajectory, identify the sudden rise time points in the change of feed quality, and extract the data on the change of screen surface material coverage before and after the corresponding time point; The difference in the material coverage rate change data of the screen surface corresponding to the time node of sudden increase in feed is calculated as the coverage rate increase, and arranged into a set of continuous changes in time order; By combining the continuous change set for overall aggregation, the correspondence between changes in feed quality, changes in screen material coverage, and changes in vibration frequency is retained, and pulse change characteristic information is generated.

3. The collaborative control method for rice cleaning and screening equipment according to claim 2, characterized in that, The process of constructing the rhythm mapping relationship is as follows: Select the coverage increase rate arranged in chronological order from the pulse change feature information, form a continuous relationship unit from two adjacent coverage increase rate increases, and record the difference value as the change span. The overall range is sorted according to the range of change, and the range of change is divided into multiple continuous range segments according to the numerical distribution. A start boundary and an end boundary are set for each range segment, and multiple vibration adjustment intervals are divided. The variation span and vibration frequency change rate are configured for the corresponding vibration adjustment range, so that the variation span within the same vibration adjustment range corresponds to the same vibration frequency change rate. The correspondence between vibration adjustment intervals and vibration frequency change rates is summarized and arranged in a unified order to construct a rhythm mapping relationship.

4. The collaborative control method for rice cleaning and screening equipment according to claim 3, characterized in that, After arranging the variation spans in ascending order of numerical value, the variation spans are divided into multiple range segments, and a start boundary and an end boundary are set for each range segment. Each range segment corresponds to a vibration adjustment interval, and the vibration frequency change rate is configured step by step according to the hierarchical order of the vibration adjustment interval.

5. The collaborative control method for rice cleaning and screening equipment according to claim 3, characterized in that, The steps involved in forming the dwell distribution state are as follows: In the matching rhythm mapping relationship, the vibration adjustment interval and the vibration frequency change rate are matched, and the change span corresponding to each time node is matched with the vibration adjustment interval and the vibration frequency change rate is switched. Divide the screen into front, middle and rear sections, record the time nodes when the material enters the front section, leaves the front section and enters the middle section, and leaves the middle section and enters the rear section, and obtain the residence time. The durations of the first, middle, and last segments of each time point are combined and arranged in chronological order to form a continuous unfolding structure. The dwell times of the front, middle and rear sections in the continuously unfolded structure are integrated and arranged by time to form a dwell distribution state.

6. The collaborative control method for rice cleaning and screening equipment according to claim 5, characterized in that, The dwell time combinations are arranged in chronological order as a continuous unfolding structure, and the dwell time of each time node is arranged in the horizontal direction as the first, middle and last dwell time, so that the first, middle and last dwell times form a corresponding change trajectory.

7. The collaborative control method for rice cleaning and screening equipment according to claim 5, characterized in that, The steps for outputting the beat allocation scheme are as follows: Extract the duration of the first segment, the duration of the middle segment, and the duration of the last segment corresponding to each time node in the dwell distribution state, and calculate the difference ratio; Map the difference ratio to the feed release interval, adjust the feed release interval at each time point, and generate a distribution of changing intervals; The arrangement of the intervals is changed and the continuous interval structure is formed in chronological order, which transforms the continuous release mode into a time-sharing release mode; Integrate the relationship between the release interval and the difference ratio of each time segment in the time-sharing release method, and output the beat allocation scheme.

8. The collaborative control method for rice cleaning and screening equipment according to claim 7, characterized in that, The continuous interval structure is divided into multiple time segments in chronological order. The release intervals for each time segment are consistent, and a corresponding relationship is established between the release interval of each time segment and the ratio of the difference between the corresponding time nodes.

9. The collaborative control method for rice cleaning and screening equipment according to claim 7, characterized in that, The steps for continuously correcting the rate of change of vibration frequency are as follows: Read the start time, duration and feeding release interval of each time-sharing release stage in the cycle rhythm allocation scheme, and introduce the vibration frequency change rate according to the corresponding rhythm mapping relationship; Record the screen material coverage values ​​at the start and end times of each time-sharing release stage and calculate the coverage change. Arrange the coverage changes of adjacent release stages to generate fluctuation amplitude. The vibration frequency change rate of each time-sharing release stage is adjusted segment by segment based on the fluctuation amplitude, and the vibration rhythm within each stage is updated. Track the fluctuation amplitude of material coverage in adjacent release stages, and keep the vibration frequency change rate stable when the fluctuation amplitude is within a preset percentage range.

10. A collaborative control system for rice cleaning and screening equipment, used to implement the collaborative control method for rice cleaning and screening equipment as described in any one of claims 1-9, characterized in that, It includes a pulse feature extraction module, a rhythm mapping module, a dwell distribution analysis module, a feed cycle time adjustment module, and a dynamic collaborative control module. The pulse feature extraction module acquires the changes in feed quality, screen material coverage, and vibration frequency during the continuous operation of the rice cleaning and screening equipment. It constructs a dynamic change trajectory in chronological order and extracts the increase in coverage corresponding to each sudden increase in feed to generate pulse change feature information. The rhythm mapping module calculates the span between two adjacent coverage increases in the pulse change feature information, divides multiple vibration adjustment intervals according to the span, and configures the corresponding vibration frequency change rate for each vibration adjustment interval to construct a rhythm mapping relationship. The residence distribution analysis module adjusts the vibration frequency change rate segment by segment in each vibration adjustment interval based on the rhythm mapping relationship. At the same time, it counts the material residence time corresponding to the front, middle and rear sections of the screen and arranges the material residence time at each position to generate a dynamic distribution map, forming the residence distribution status. The feeding cycle timing module calculates the ratio of the difference between the material residence time in the front, middle and rear sections of the screen based on the residence distribution state, adjusts the feeding release interval at each time according to the ratio of the difference, changes the continuous release mode to the time-sharing release mode, and outputs the cycle timing timing scheme. The dynamic coordinated control module continuously corrects the rate of change of vibration frequency corresponding to each time-sharing release stage according to the rhythm allocation scheme until the fluctuation amplitude of material coverage rate corresponding to adjacent release stages is within the preset percentage range.

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