Intelligent combined control high-precision weight reduction control method and system and storage medium

Abstract

The invention provides an intelligent combined control high-precision weight reduction control method and system and a storage medium. The method comprises the steps that the batching amount of each batch of each material is set on an upper computer; obtaining net weight data of the metering hopper, and supplementing materials to the metering hopper through a material supplementing valve at the bottom of the raw material bin to a preset net weight upper limit parameter; the control device is used for monitoring the residual batch discharging cumulant in the raw material bin in real time, comparing the residual batch discharging cumulant with a preset slow feeding quantity parameter, judging whether the residual batch discharging cumulant is lower than the preset slow feeding quantity parameter or not, and if yes, sending a control instruction to the discharging spiral conveying device; whether the cumulative amount of the remaining batches of discharged materials is lower than a preset air amount parameter or not is judged, if yes, a shutdown control instruction is sent to a discharging spiral conveying device, the discharging spiral conveying device is controlled to be shut down, and a discharging stop valve is closed; according to the method provided by the invention, dual cooperative control is realized, the metering error can be controlled within a minimum range, and the precision of each batch of batching is ensured.

Description

Technical Field

[0001] This invention relates to the field of batching industry control technology, and in particular to a high-precision weight reduction control method, system and storage medium with intelligent combined control. Background Technology

[0002] Studies have found that in many traditional industrial production settings, such as fertilizer production, feed production, and non-ferrous metal smelting, it is necessary to continuously and quantitatively batch-by-batch batch feeding of various bulk raw materials. The formula for each batch of various materials is frequently adjusted according to demand, and the total metering accuracy is required to be above 0.5%. However, the control of traditional weight-reducing scales is relatively simple. It only triggers the command to shut down the discharge screw conveyor or conveyor belt by monitoring whether the material weight reaches the preset value.

[0003] This control method completely ignores details such as the inertial impact during the material's descent and the differences in the fluidity of different materials, which can easily lead to deviations between the actual feed rate and the target value, making it difficult to meet stringent measurement accuracy standards. More importantly, when the production line needs to frequently adjust the formula, the single control logic of the traditional weight-reducing scale will amplify the cumulative effect of errors. This production loss caused by the rigid control method is particularly prominent in the current multi-variety, small-batch production mode. Summary of the Invention

[0004] This invention provides a high-precision weight reduction control method, system, and storage medium with intelligent combined control to solve the technical problems existing in the prior art.

[0005] To address the aforementioned technical problems, in a first aspect, the present invention provides a high-precision weight reduction control method with intelligent combined control, comprising: The amount of each material to be dispensed in each batch is set on the host computer; Obtain the net weight data of the metering hopper, and replenish the metering hopper with material through the feeding valve at the bottom of the raw material silo until the preset net weight upper limit parameter is reached; Within the initial preset time period, the discharge screw conveyor is controlled to operate at a preset fast forward speed to convey the material falling from the discharge port at the end of the metering hopper, and the current net weight of the metering hopper is monitored in real time. When the current net weight of the metering hopper is lower than the preset lower limit parameter, the feeding valve at the bottom of the raw material silo is reopened to start the feeding operation until the current metering hopper reaches the upper limit parameter of the net weight again. The system monitors the cumulative amount of remaining batches of material discharged in the raw material warehouse in real time, compares the cumulative amount of remaining batches of material discharged with the preset slow feed parameter, and determines whether the cumulative amount of remaining batches of material discharged is lower than the preset slow feed parameter. If so, a control command is sent to the discharge screw conveyor to control and adjust the discharge screw conveyor to change the preset fast feed speed mode to the preset slow speed mode. The system monitors the cumulative amount of remaining batches of material discharged in the raw material warehouse in real time, and determines whether the cumulative amount of remaining batches of material discharged is lower than the preset air volume parameter. If so, it sends a shutdown control command to the discharge screw conveyor to control the discharge screw conveyor to stop and close the discharge shut-off valve. All control commands and production operation data graphs are stored and sent to the host computer via data communication.

[0006] Preferably, as one possible implementation, the step of obtaining the net weight data of the weighing hopper and replenishing the weighing hopper to a preset upper limit net weight parameter through the feeding valve at the bottom of the raw material silo includes: Real-time acquisition of net weight data from the weighing hopper; The collected net weight data is compared with the preset upper limit parameter for net weight. If the net weight data does not reach the upper limit parameter of net weight, the feeding valve at the bottom of the raw material silo will be opened to feed the material. Continuously monitor the net weight data until the upper limit parameter for net weight is reached, then close the feeding valve.

[0007] Preferably, as one possible implementation; the controlled discharge screw conveyor operates at a preset fast forward speed to convey the material falling from the discharge port at the end of the metering hopper, and monitors the current net weight of the metering hopper in real time. When the current net weight of the metering hopper is lower than a preset lower limit parameter, the feeding valve at the bottom of the raw material silo is reopened to start the feeding operation, including: Obtain the operating status of the discharge screw conveyor; The discharge screw conveyor is set to run at a preset fast forward speed; Real-time comparison of the net weight data of the measuring hopper with the lower limit parameter of net weight; If the net weight data is lower than the lower limit parameter of net weight, the feeding valve at the bottom of the raw material silo will be reopened to start the feeding operation. Once the feed reaches the upper limit of net weight, adjust and close the feed valve at the bottom of the raw material silo.

[0008] Preferably, as one possible implementation; the real-time monitoring of the cumulative amount of remaining batches discharged in the raw material warehouse, comparing the cumulative amount of remaining batches discharged with a preset slow feed parameter, determining whether the cumulative amount of remaining batches discharged is lower than the preset slow feed parameter, and if so, sending a control command to the discharge screw conveyor to control and adjust the discharge screw conveyor to operate at a preset slow speed instead of a preset fast feed speed, includes: Get the cumulative amount of material discharged from the remaining batches; Compare the cumulative amount of the remaining batches with the preset slow feed rate parameter; If the cumulative amount of the remaining batches of material discharged is less than the slow feed parameter, the discharge screw conveyor will be adjusted to the preset slow operating state via the frequency converter. Continuously monitor the cumulative discharge volume to maintain the stability of slow operation.

[0009] Preferably, as one possible implementation; the real-time monitoring of the cumulative amount of remaining batches discharged in the raw material warehouse, determining whether the cumulative amount of remaining batches discharged is lower than a preset air volume parameter, and if so, sending a shutdown control command to the discharge screw conveyor to control the discharge screw conveyor to stop and close the discharge shut-off valve, includes: Real-time acquisition of the cumulative discharge volume of remaining batches; Compare the cumulative amount of the remaining batches with the preset air quantity parameters; If the cumulative amount of the remaining batches of material discharged is less than the air quantity parameter, the discharge shut-off valve will be triggered to close. Record the cumulative discharge amount when the discharge shut-off valve is closed; Verify the net weight data of the measuring hopper after it is closed to confirm the accuracy of the measurement.

[0010] Preferably, as one possible implementation, the step of storing graphs of all control commands and all production operation data, and sending them to the host computer via data communication, includes: Collect data on the opening time, frequency, and amount of material replenishment valve at the bottom of the raw material silo during the production process; net weight data at the metering hopper; discharge volume; and discharge speed data of the discharge screw conveyor. Generate production operation curves based on the collected data; The generated data is transmitted to the host computer using a preset standard protocol.

[0011] Secondly, the present invention provides a high-precision weight reduction control system with intelligent combined control, including a control system, a raw material silo, a feeding valve, a metering hopper, a discharge screw conveyor at the bottom of the metering hopper, and a discharge cut-off valve located at the end of the discharge screw conveyor. The intelligent combined control high-precision reduction weighing system is arranged from top to bottom as a raw material silo, a metering hopper, and a discharge screw conveyor. The feeding valve is located at the bottom outlet of the raw material silo; the metering hopper includes a weight-reducing metering hopper body, support ears on both sides of the weight-reducing metering hopper body, and a weighing sensor; one end of the discharge screw conveyor is connected to the end discharge port of the metering hopper, and the other end of the discharge screw conveyor is provided with the discharge cut-off valve. The control system includes an embedded host computer, a PLC controller, and a frequency converter; the host computer sets the batching amount of each material for each batch. The control system is used to acquire the net weight data of the weighing hopper and replenish the weighing hopper to a preset upper limit net weight parameter through the feeding valve at the bottom of the raw material silo. Within an initial preset time period, the system controls the discharge screw conveyor to operate at a preset fast forward speed to transport the material falling from the discharge port at the end of the weighing hopper, and monitors the current net weight of the weighing hopper in real time. When the current net weight of the weighing hopper is lower than the preset lower limit net weight parameter, the system restarts the feeding valve at the bottom of the raw material silo to begin the feeding operation until the current weighing hopper reaches the upper limit net weight parameter again. The system also monitors the cumulative amount of remaining batches of material discharged from the raw material silo in real time and compares the cumulative amount of remaining batches of material discharged with a preset slow forward parameter. The system compares and determines whether the cumulative amount of remaining batches discharged is lower than the preset slow feed parameter. If so, it sends a control command to the discharge screw conveyor to adjust the preset fast feed speed to the preset slow speed. It also monitors the cumulative amount of remaining batches discharged in the raw material silo in real time and determines whether it is lower than the preset air feed parameter. If so, it sends a stop control command to the discharge screw conveyor to stop the machine and close the discharge shut-off valve. Finally, it stores all control commands and graphs of all production operation data and sends them to the host computer via data communication.

[0012] Thirdly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, enables the implementation of the high-precision weight reduction control method as described above with intelligent combined control.

[0013] The technical solution provided by this invention has the following beneficial effects: In summary, this invention discloses a high-precision weight reduction control method and system with intelligent combined control, proposing a solution for precise control of output volume through real-time information analysis. Its innovative approach employs an intelligent combined control system, the core of which lies in the high-precision weighing sensor equipped on the weighing scale. This sensor can capture changes in material weight in real time and synchronously transmit the data to the intelligent control system, forming a fast-response closed-loop control link in conjunction with the frequency conversion control of the discharge screw conveyor and the discharge shut-off valve. During batching operations, the weighing sensor can precisely interlock and control the operating frequency of the discharge screw conveyor according to the given weight requirements. Specifically, by adjusting the screw speed, it achieves fast / slow control, automatically adjusting to a low-frequency, slow-speed discharge before reaching the set weight, and interlocking to stop the discharge screw conveyor and the outlet shut-off valve upon reaching the set weight, ensuring the metering accuracy of each batch. This dual collaborative control mechanism can control the metering error within a minimal range, ensuring the accuracy of each batch of batches. Attached Figure Description

[0014] Figure 1 A main flowchart of a high-precision weight reduction control method with intelligent combined control provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of a specific implementation process of a high-precision weight reduction control method with intelligent combined control provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of another specific implementation process of a high-precision weight reduction control method with intelligent combined control provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of another specific implementation process of a high-precision weight reduction control method with intelligent combined control provided in an embodiment of the present invention; Figure 5 A schematic diagram of the specific process for controlling the shutdown of the discharge screw conveyor and closing the discharge shut-off valve in a high-precision weight reduction control method with intelligent combined control provided in an embodiment of the present invention. Figure 6 This is a schematic diagram illustrating the specific process of sending data communication to the host computer in a high-precision weight reduction control method with intelligent combined control provided in an embodiment of the present invention. Figure 7 A schematic diagram of the principle structure of a high-precision weight reduction control system with intelligent combined control provided in an embodiment of the present invention; Figure 8 This is a physical structural diagram of a high-precision weight reduction control system with intelligent combined control provided in an embodiment of the present invention.

[0015] Labels: Control system 10, raw material bin 20, feeding valve 30, metering hopper 40, weight-reducing metering hopper body 41, support lug 42, weighing sensor 43, discharge screw conveyor 50, discharge shut-off valve 60. Detailed Implementation

[0016] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated components or constituent parts, without excluding other components or constituent parts.

[0017] The technical solution of the present invention is illustrated below through specific embodiments. It should be understood that the one or more steps mentioned in the present invention do not preclude the existence of other methods and steps before or after the combined steps, or that other methods and steps may be inserted between these explicitly mentioned steps. It should also be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Unless otherwise stated, the numbering of each method step is only for the purpose of identifying each method step, and not for limiting the order of each method or limiting the scope of the present invention. Changes or adjustments to their relative relationships, without substantial changes to the technical content, can also be considered as within the scope of the present invention.

[0018] The raw materials and instruments used in the examples are not subject to any specific restrictions on their source; they can be purchased from the market or prepared according to conventional methods known to those skilled in the art.

[0019] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1 like Figure 1 As shown, Embodiment 1 of the present invention provides a high-precision weight reduction control method with intelligent combined control, including the following operation steps: S100, the amount of each material for each batch is set on the host computer; S200: Obtain the net weight data of the metering hopper and replenish the metering hopper with the preset net weight upper limit parameter through the feeding valve at the bottom of the raw material silo. S300. Within the initial preset time period, control the discharge screw conveyor to operate at a preset fast forward speed to convey the material falling from the discharge port at the end of the metering hopper, and monitor the current net weight of the metering hopper in real time. When the current net weight of the metering hopper is lower than the preset lower limit parameter of net weight, control the opening of the feeding valve at the bottom of the raw material silo to start the feeding operation until the current metering hopper reaches the upper limit parameter of net weight again. S400: Monitor the cumulative amount of remaining batches discharged in the raw material warehouse in real time, compare the cumulative amount of remaining batches discharged with the preset slow feed parameter, and determine whether the cumulative amount of remaining batches discharged is lower than the preset slow feed parameter. If so, send a control command to the discharge screw conveyor to control and adjust the discharge screw conveyor to adjust the preset fast feed speed mode to the preset slow speed mode. S500: Real-time monitoring of the cumulative amount of remaining batches discharged in the raw material warehouse; determining whether the cumulative amount of remaining batches discharged is lower than the preset air volume parameter; if so, sending a shutdown control command to the discharge screw conveyor to control the discharge screw conveyor to stop and close the discharge cut-off valve. S600 stores all control commands and graphs of all production operation data, and sends them to the host computer via data communication.

[0021] This invention provides a high-precision weight reduction control method with intelligent combined control (i.e., material metering and discharge control method), mainly including: acquiring the net weight data of the metering hopper and replenishing the metering hopper to a preset upper limit net weight parameter through the replenishment valve at the bottom of the raw material silo; controlling the discharge screw conveyor to run at a fast forward speed, and restarting replenishment to the upper limit net weight parameter when the net weight of the metering hopper is lower than the preset lower limit net weight parameter; adjusting the discharge screw conveyor to run at a slow speed according to the comparison between the remaining batch discharge cumulative amount and the preset slow forward amount parameter; closing the discharge cut-off valve according to the comparison between the remaining batch discharge cumulative amount and the preset air volume parameter; automatically starting replenishment after the batch discharge is completed, and entering the next production cycle; generating curves and trend charts of production operation data, and communicating data with the host computer.

[0022] The high-precision weight reduction control method with intelligent combined control provided by the present invention can capture changes in material weight in real time and transmit the data synchronously to the intelligent control system. Combined with the discharge screw conveyor, it realizes frequency conversion control and discharge shut-off valve to form a fast-response closed-loop control link. This system can solve the automatic batching of high-precision solid raw materials and has the functions of high metering accuracy and high feeding efficiency.

[0023] This invention provides a high-precision weight reduction control method with intelligent combined control, which realizes automatic batching of high-precision solid raw materials, and has the functions of high metering accuracy and efficient feeding; real-time monitoring of the net weight of the metering hopper and timely replenishment of materials ensures stable material supply; and the discharge speed is adjusted according to the remaining discharge amount to improve the discharge accuracy.

[0024] Preferably, as one feasible implementation; such as Figure 2 As shown, the step of acquiring the net weight data of the weighing hopper and replenishing the weighing hopper to a preset upper limit net weight parameter through the feeding valve at the bottom of the raw material silo includes: S210, Real-time acquisition of net weight data from the measuring hopper; S220. Compare the collected net weight data with the preset upper limit parameter of net weight; S230. If the net weight data does not reach the upper limit parameter of net weight, control the feeding valve at the bottom of the raw material silo to open for feeding. S240: Continuously monitor net weight data until the upper limit of net weight is reached, then close the feeding valve.

[0025] Analysis of the specific technical solutions described above shows that by collecting net weight data in real time and comparing it with a preset upper limit, the system can precisely control the opening and closing of the feeding valve. This ensures that the amount of material in the metering hopper is always maintained at the estimated level, avoiding metering errors caused by insufficient or excessive material, thus directly contributing to the overall metering accuracy.

[0026] Preferably, as one feasible implementation; such as Figure 3As shown, the controlled discharge screw conveyor operates at a preset fast forward speed to convey material falling from the discharge port at the end of the metering hopper, and monitors the current net weight of the metering hopper in real time. When the current net weight of the metering hopper is lower than the preset lower limit parameter, the feeding valve at the bottom of the raw material silo is reopened to start the feeding operation, including: S310. Obtain the operating status of the discharge screw conveyor; S320. Set the discharge screw conveyor to run at a preset fast forward speed; S330, Real-time comparison of net weight data in the measuring hopper with the lower limit parameter of net weight; S340. If the net weight data is lower than the lower limit parameter of net weight, the feeding valve at the bottom of the raw material silo will be reopened to start the feeding operation. S350. After replenishing the material to the upper limit of the net weight parameter, adjust and close the replenishment valve at the bottom of the raw material silo.

[0027] Analysis of the above preferred implementation scheme shows that by acquiring the operating status of the discharge screw (e.g., step S310) and setting the fast forward speed (e.g., step S320), the system achieves high-speed discharge; real-time comparison of net weight with lower limit parameters and triggering material replenishment when the weight is below the lower limit ensures that the material in the metering hopper will not be exhausted, thereby enabling the discharge screw to run continuously, reducing production interruptions and improving production efficiency.

[0028] Preferably, as one feasible implementation; such as Figure 4 As shown, the real-time monitoring of the cumulative amount of remaining batches discharged from the raw material warehouse, comparing the cumulative amount of remaining batches discharged with a preset slow feed parameter, and determining whether the cumulative amount of remaining batches discharged is lower than the preset slow feed parameter, if so, sending a control command to the discharge screw conveyor to control and adjust the discharge screw conveyor to change from a preset fast feed speed mode to a preset slow speed mode, including: S410, Obtain the cumulative amount of material discharged in the remaining batches; S420. Compare the cumulative amount of the remaining batches with the preset slow feed rate parameter; S430. If the cumulative amount of the remaining batches of material discharged is less than the slow feed parameter, the discharge screw conveyor is adjusted to the preset slow operation state by the frequency converter. S440: Continuously monitors the cumulative discharge volume to maintain the stability of slow operation.

[0029] Analysis of the above preferred implementation scheme shows that by monitoring the cumulative amount of remaining batches of material in real time and adjusting the discharge screw to a slow speed, that is, slowing down the speed when the discharge is nearing the end, the accuracy of the discharge is improved, excessive discharge is avoided, and the error of the final discharge is reduced, thereby improving the accuracy of batch batching.

[0030] Preferably, as one feasible implementation; such as Figure 5As shown, the real-time monitoring of the cumulative amount of remaining batches discharged in the raw material warehouse, determining whether the cumulative amount of remaining batches discharged is lower than a preset air volume parameter, and if so, sending a shutdown control command to the discharge screw conveyor to control the discharge screw conveyor to stop and close the discharge shut-off valve, includes: S510: Real-time acquisition of the cumulative amount of remaining batches discharged; S520. Compare the cumulative amount of the remaining batches of material output with the preset air quantity parameters; S530. If the cumulative amount of the remaining batches of material discharged is less than the air quantity parameter, the discharge shut-off valve will be triggered to close. S540. Record the cumulative discharge amount when the discharge shut-off valve is closed; S550. Verify the net weight data of the measuring hopper after it is closed to confirm the measurement accuracy.

[0031] Analysis of the above specific technical solutions shows that by acquiring the cumulative amount of remaining material in real time and comparing it with the air quantity parameters, the system closes the discharge shut-off valve at an appropriate time, taking into account the amount of material remaining in the air; recording the cumulative discharge amount and verifying the net weight at the time of closure ensures that the final discharge amount meets the preset value, thereby avoiding over-discharge or waste and improving the metering accuracy.

[0032] Preferably, as one feasible implementation; such as Figure 6 As shown, the process of storing all control commands and all production operation data graphs, and sending them to the host computer via data communication, includes: S610. Collect the opening time, number of times and amount of material replenishment valve at the bottom of the raw material silo, net weight data at the metering hopper, discharge volume and discharge speed data of the discharge screw conveyor during the production process. S620. Generate a production operation curve based on the collected data; S630 uses a preset standard protocol to transmit the generated data to the host computer.

[0033] Analysis of the specific technical solutions described above shows that by collecting production data (such as feed valve operation, net weight data, and discharge speed), the system generates graphs and transmits them to the host computer. This enables operators to analyze production trends, identify problems, and make remote adjustments, improving the system's maintainability. The above solutions provide data recording and remote monitoring, facilitating subsequent production management and optimization.

[0034] Example 2 Embodiment 2 of the present invention provides a high-precision weight reduction control system with intelligent combined control, including a control system 10, a raw material silo 20, a feeding valve 30, a metering hopper 40, a discharge screw conveyor 50 at the bottom of the metering hopper 40, and a discharge cut-off valve 60 at the end of the discharge screw conveyor 50. The intelligent combined control high-precision reduction weighing system is provided with a raw material silo 20, a metering hopper 40 and a discharge screw conveyor 50 from top to bottom. The feeding valve 30 is located at the bottom outlet of the raw material silo 20; the metering hopper 40 includes a weight-reducing metering hopper body 41, support ears 42 located on both sides of the weight-reducing metering hopper body, and a weighing sensor 43; one end of the discharge screw conveyor 50 is connected to the end discharge port of the metering hopper 40, and the other end of the discharge screw conveyor 50 is provided with the discharge cut-off valve 60. The control system 10 includes an embedded host computer (i.e., a touch screen control terminal), a PLC controller, and a frequency converter; the host computer sets the batching amount of each material for each batch. The control system 10 is used to acquire the net weight data of the metering hopper and replenish the metering hopper to a preset upper limit net weight parameter through the feeding valve at the bottom of the raw material silo; within an initial preset time period, it controls the discharge screw conveyor to operate at a preset fast forward speed to convey the material falling from the discharge port at the end of the metering hopper, and monitors the current net weight of the metering hopper in real time. When the current net weight of the metering hopper is lower than the preset lower limit net weight parameter, it restarts the feeding valve at the bottom of the raw material silo to start the feeding operation until the current metering hopper reaches the upper limit net weight parameter again; it also monitors the cumulative amount of remaining batches discharged in the raw material silo in real time, and compares the cumulative amount of remaining batches discharged with the preset slow forward parameter. The system compares and determines whether the cumulative amount of remaining batches discharged is lower than the preset slow feed parameter. If so, a control command is sent to the discharge screw conveyor to adjust it from the preset fast feed speed to the preset slow speed. The system also monitors the cumulative amount of remaining batches discharged in the raw material silo in real time and determines whether it is lower than the preset air feed parameter. If so, a stop control command is sent to the discharge screw conveyor to stop it and close the discharge shut-off valve. All control commands and production operation data graphs are stored and sent to the host computer via data communication.

[0035] In a specific implementation plan, the intelligent combination control high-precision weight reduction weighing system provided in this embodiment of the invention includes a control system 10, a raw material bin 20, a feeding valve 30, a metering hopper 4[1]0 (weight reduction metering bin body 41, support ear 42, weighing sensor 43), a discharge screw conveyor 50 at the bottom of the metering hopper 40, a discharge cut-off valve 60 at the end of the discharge screw conveyor 50, and matching pipe fittings. The above control system adopts a distributed structure of computer (touch screen) + PLC + multiple dedicated instruments, which can complete the following functions: (1) Set the batching amount and discharge speed of each material in each batch on the host computer. (2) The automatic operation process of the system is as follows: After the start of operation, the feeding valve at the bottom of the raw material silo feeds the metering hopper to the "net weight upper limit" of the metering hopper, and then the discharge screw conveyor runs at a fast speed; if the net weight of the metering hopper is less than the "net weight lower limit" during operation, the feeding is restarted and fed to the "net weight upper limit", and so on. Until the cumulative amount of the remaining batches is less than the "slow feed amount" parameter, the system uses the frequency converter to make the discharge screw conveyor run at a slow speed; when the cumulative amount of the remaining batches is less than the "air amount" parameter, the discharge cut-off valve is closed. This ensures the metering accuracy of each batch of material. (3) After each batch of material is discharged, the system will automatically replenish the material to complete the next production cycle. (4) The system will generate curves and trend charts of production operation data, record tables, and record fault alarms, start-up, shutdown, shift handover, formula modification, etc. It will also communicate with the host computer.

[0036] Example 3 The present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, enables the implementation of the high-precision weight reduction control method as described above with intelligent combined control.

[0037] This invention provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the steps of the high-precision weight reduction control method of any of the aforementioned intelligent combined control methods. In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory, random access memory, portable hard drives, magnetic disks, or optical disks.

[0038] In summary, this invention discloses a high-precision weight reduction control method and system with intelligent combined control, proposing a solution for precise control of output quantity through real-time information analysis. Its innovative intelligent combined control system is based on a high-precision weighing sensor equipped on the weighing scale, which can capture changes in material weight in real time and synchronously transmit the data to the intelligent control system. This sensor, combined with the frequency conversion control of the discharge screw conveyor and the discharge shut-off valve, forms a fast-response closed-loop control link. During batching operations, the weighing sensor can precisely interlock and control the operating frequency of the discharge screw conveyor according to the given weight requirements. This is achieved by adjusting the screw speed to control the speed, automatically adjusting to a low-frequency, slow speed before reaching the set weight, and interlocking to stop the discharge screw conveyor and the outlet shut-off valve upon reaching the set weight, ensuring the metering accuracy of each batch. This dual collaborative control mechanism can control the metering error to a very small range, ensuring the accuracy of each batch of batches and significantly improving the stability of the production process.

[0039] Therefore, the technical solution of this invention achieves accurate measurement by dynamically adjusting the feeding and discharging speeds. Compared with the fixed-speed feeding and discharging solutions in the prior art, it can dynamically adjust the operating status of the feeding valve and the discharging screw conveyor based on real-time net weight data, thereby improving the measurement accuracy and production efficiency of each batch of material.

[0040] The above provides a detailed description of the high-precision weight reduction control method, system, and storage medium for intelligent combined control provided by this invention. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of this invention.

Claims

1. A high-precision weight reduction control method with intelligent combined control, characterized in that, include: The amount of each material to be dispensed in each batch is set on the host computer; Obtain the net weight data of the metering hopper, and replenish the metering hopper with material through the feeding valve at the bottom of the raw material silo until the preset net weight upper limit parameter is reached; Within the initial preset time period, the discharge screw conveyor is controlled to operate at a preset fast forward speed to convey the material falling from the discharge port at the end of the metering hopper, and the current net weight of the metering hopper is monitored in real time. When the current net weight of the metering hopper is lower than the preset lower limit parameter, the feeding valve at the bottom of the raw material silo is reopened to start the feeding operation until the current metering hopper reaches the upper limit parameter of the net weight again. The system monitors the cumulative amount of remaining batches of material discharged in the raw material warehouse in real time, compares the cumulative amount of remaining batches of material discharged with the preset slow feed parameter, and determines whether the cumulative amount of remaining batches of material discharged is lower than the preset slow feed parameter. If so, a control command is sent to the discharge screw conveyor to control and adjust the discharge screw conveyor to change the preset fast feed speed mode to the preset slow speed mode. The system monitors the cumulative amount of remaining batches of material discharged in the raw material warehouse in real time, and determines whether the cumulative amount of remaining batches of material discharged is lower than the preset air volume parameter. If so, it sends a shutdown control command to the discharge screw conveyor to control the discharge screw conveyor to stop and close the discharge shut-off valve. All control commands and production operation data graphs are stored and sent to the host computer via data communication.

2. The method as described in claim 1, characterized in that, The process of acquiring the net weight data of the weighing hopper and replenishing the weighing hopper to a preset upper limit net weight parameter via the feeding valve at the bottom of the raw material silo includes: Real-time acquisition of net weight data from the weighing hopper; The collected net weight data is compared with the preset upper limit parameter for net weight. If the net weight data does not reach the upper limit parameter of net weight, the feeding valve at the bottom of the raw material silo will be opened to feed the material. Continuously monitor the net weight data until the upper limit parameter for net weight is reached, then close the feeding valve.

3. The method as described in claim 1, characterized in that, The controlled discharge screw conveyor operates at a preset fast forward speed to convey material falling from the discharge port at the end of the metering hopper, and monitors the current net weight of the metering hopper in real time. When the current net weight of the metering hopper is lower than the preset lower limit parameter, it restarts the feeding valve at the bottom of the raw material silo to initiate the feeding operation, including: Obtain the operating status of the discharge screw conveyor; The discharge screw conveyor is set to run at a preset fast forward speed; Real-time comparison of the net weight data of the measuring hopper with the lower limit parameter of net weight; If the net weight data is lower than the lower limit parameter of net weight, the feeding valve at the bottom of the raw material silo will be reopened to start the feeding operation. Once the feed reaches the upper limit of net weight, adjust and close the feed valve at the bottom of the raw material silo.

4. The method as described in claim 1, characterized in that, The real-time monitoring of the cumulative amount of remaining batches discharged from the raw material silo, comparing the cumulative amount of remaining batches discharged with a preset slow feed parameter, and determining whether the cumulative amount of remaining batches discharged is lower than the preset slow feed parameter, if so, sending a control command to the discharge screw conveyor to control and adjust the discharge screw conveyor to operate at a preset slow speed instead of a preset fast feed speed, including: Get the cumulative amount of material discharged from the remaining batches; Compare the cumulative amount of the remaining batches with the preset slow feed rate parameter; If the cumulative amount of the remaining batches of material discharged is less than the slow feed parameter, the discharge screw conveyor will be adjusted to the preset slow operating state via the frequency converter. Continuously monitor the cumulative discharge volume to maintain the stability of slow operation.

5. The method as described in claim 1, characterized in that, The method of real-time monitoring of the cumulative amount of remaining batches discharged in the raw material warehouse, determining whether the cumulative amount of remaining batches discharged is lower than a preset air volume parameter, and if so, sending a shutdown control command to the discharge screw conveyor to control the discharge screw conveyor to stop and close the discharge shut-off valve, includes: Real-time acquisition of the cumulative discharge volume of remaining batches; Compare the cumulative amount of the remaining batches with the preset air quantity parameters; If the cumulative amount of the remaining batches of material discharged is less than the air quantity parameter, the discharge shut-off valve will be triggered to close. Record the cumulative discharge amount when the discharge shut-off valve is closed; Verify the net weight data of the measuring hopper after it is closed to confirm the accuracy of the measurement.

6. The method as described in claim 1, characterized in that, The process of storing all control commands and production operation data graphs, and sending them to the host computer via data communication, includes: Collect data on the opening time, frequency, and amount of material replenishment valve at the bottom of the raw material silo during the production process; net weight data at the metering hopper; discharge volume; and discharge speed data of the discharge screw conveyor. Generate production operation curves based on the collected data; The generated data is transmitted to the host computer using a preset standard protocol.

7. A high-precision weight reduction control system with intelligent combined control, characterized in that, It includes a control system, a raw material silo, a feeding valve, a metering hopper, a discharge screw conveyor at the bottom of the metering hopper, and a discharge shut-off valve located at the end of the discharge screw conveyor. The intelligent combined control high-precision reduction weighing system is arranged from top to bottom as a raw material silo, a metering hopper, and a discharge screw conveyor. The feeding valve is located at the bottom outlet of the raw material silo; the metering hopper includes a weight-reducing metering hopper body, support ears on both sides of the weight-reducing metering hopper body, and a weighing sensor; one end of the discharge screw conveyor is connected to the end discharge port of the metering hopper, and the other end of the discharge screw conveyor is provided with the discharge cut-off valve. The control system includes an embedded host computer, a PLC controller, and a frequency converter; the host computer sets the batching amount of each material for each batch. The control system is used to acquire the net weight data of the weighing hopper and replenish the weighing hopper to a preset upper limit net weight parameter through the feeding valve at the bottom of the raw material silo. Within an initial preset time period, the system controls the discharge screw conveyor to operate at a preset fast forward speed to transport the material falling from the discharge port at the end of the weighing hopper, and monitors the current net weight of the weighing hopper in real time. When the current net weight of the weighing hopper is lower than the preset lower limit net weight parameter, the system restarts the feeding valve at the bottom of the raw material silo to begin the feeding operation until the current weighing hopper reaches the upper limit net weight parameter again. The system also monitors the cumulative amount of remaining batches of material discharged from the raw material silo in real time and compares the cumulative amount of remaining batches of material discharged with a preset slow forward parameter. The system compares and determines whether the cumulative amount of remaining batches discharged is lower than the preset slow feed parameter. If so, it sends a control command to the discharge screw conveyor to adjust the preset fast feed speed to the preset slow speed. It also monitors the cumulative amount of remaining batches discharged in the raw material silo in real time and determines whether it is lower than the preset air feed parameter. If so, it sends a stop control command to the discharge screw conveyor to stop the machine and close the discharge shut-off valve. Finally, it stores all control commands and graphs of all production operation data and sends them to the host computer via data communication.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, enables the implementation of the high-precision weight reduction control method of intelligent combined control as described in any one of claims 1 to 6.

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