Transverse closed-loop control method, system and equipment for extrusion coating die head and storage medium

Abstract

The invention relates to the technical field of lithium battery coating, in particular to a transverse closed-loop control method, system and equipment for an extrusion coating die head and a storage medium, and the method comprises the following steps: acquiring measurement data measured by a measuring instrument on a coated product; judging whether the measurement data meet a preset standard or not; if the measurement data does not meet the preset standard, the slit opening degree of the output end of the die head is adjusted through the electric actuator till the measurement data meet the preset standard; and if the measurement data meet the preset standard, recording the transmission position of the electric actuator and the opening degree of the slit corresponding to the output end of the die head. The device has the effect of improving the coating production efficiency and stability.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery coating, and in particular to a lateral closed-loop control method, system, equipment and storage medium for an extrusion coating die. Background Art

[0002] Extrusion coating is an important step in lithium battery production. It uses pressure at the input end to make the slurry uniformly output from the lateral slit at the output end. However, in actual production, due to the influence of various factors, such as the properties of the slurry, the structure of the die head, and the production environment, it is difficult to achieve uniform and consistent output of the slurry in the lateral direction.

[0003] The traditional correction method is to manually adjust the horizontal screw on the output side according to the measurement data of the weighing instrument to change the slit opening, so that the slurry output in each area tends to be balanced. However, this traditional manual adjustment method has many defects: it requires a high sense of responsibility and personal ability of the operator, and the operator needs to have rich experience and skills to accurately judge and adjust the slit opening. The coating result needs to be measured by the weighing instrument after several tens of meters (depending on the length of the oven). After each adjustment, it is necessary to wait for the result of the weighing instrument to stabilize before adjusting the next cycle. However, it is difficult to accurately grasp this timing for manual adjustment. Early adjustment may cause overshoot, and delayed adjustment will cause waste. It is difficult to accurately grasp the relationship between deviation and adjustment amount for manual adjustment, which will lead to a longer adjustment time, resulting in low production efficiency and waste of resources. In summary, the traditional manual adjustment method has many shortcomings and cannot meet the requirements of modern industrial production for high precision and high efficiency.

[0004] Therefore, based on the above problems, the prior art still needs to be improved. Summary of the invention

[0005] The purpose of this application is to provide a lateral closed-loop control method, system, equipment and storage medium for an extrusion coating die, aiming to solve the problems of low production efficiency and stability in the traditional manual adjustment method of an extrusion coating die.

[0006] The first object of this application is to provide a lateral closed-loop control method for an extrusion coating die head, comprising: Acquire measurement data of the coated product measured by the measuring instrument; Determining whether the measurement data meets a preset standard; If the measured data does not meet the preset standard, the slit opening at the output end of the die head is adjusted by the electric actuator until the measured data meets the preset standard; If the measurement data meets the preset standard, the transmission position of the electric actuator and the slit opening corresponding to the die output end are recorded.

[0007] By adopting the above technical solution, real-time monitoring and judgment of the measurement data of the coated products are realized, and the deviation between the measurement data and the preset standard can be discovered in time, thereby improving the controllability of the production process. By automatically adjusting the slit opening at the output end of the die through the electric actuator, it is possible to quickly respond to deviations and accurately adjust the coating parameters, thereby effectively improving the quality of the coated products. For the measurement data that meets the preset standards, recording the transmission position of the electric actuator and the corresponding slit opening at the output end of the die will facilitate subsequent data analysis and optimization, and provide a basis for the continuous improvement of the production process. Overall, the automation and accuracy of the lateral closed-loop control of the extrusion coating die are improved, the interference of human factors is reduced, and the production efficiency and stability are improved.

[0008] In a possible implementation manner of the present application, the steps after recording the transmission position of the electric actuator and the slit opening corresponding to the die output end include: Analyzing the data recorded multiple times, the data including the transmission position of the electric actuator and the slit opening corresponding to the output end of the die head during multiple coating operations; Predict possible deviations based on the statistical results and operating trends of the data; Before the coating operation is performed, the slit opening at the output end of the die head is pre-adjusted by controlling the electric actuator to suppress the occurrence of the deviation in advance.

[0009] By adopting the above technical solution and analyzing the data recorded multiple times, we can gain a deep understanding of the changing rules of the transmission position of the electric actuator and the slit opening at the die output end, providing data support for subsequent predictions and adjustments. Predicting possible deviations based on the statistical results of the data and the operating trend can help take measures in advance to avoid the occurrence of deviations and improve the stability and reliability of the coating operation. Pre-adjusting the slit opening at the die output end before coating can effectively suppress the occurrence of deviations and further improve the quality and consistency of the coated products. This pre-adjustment method can reduce the number of adjustments during the production process, improve production efficiency, and reduce production costs.

[0010] In a possible implementation of the present application, the method includes: In the initial stage, the coating pressure at the die input end is kept constant, the slit opening at the die output end is adjusted, and the measuring instrument is used to measure and determine whether the measurement data meets the preset standard; In the subsequent stage, based on the experimental data and simulation calculations of the initial stage, a correlation model between the slit opening at the output end of the die and the coating pressure at the input end of the die is obtained; When the slit opening at the die output end changes, the coating pressure at the die input end is adjusted accordingly, and each adjustment is followed by measurement by a measuring instrument to ensure that the measurement data always meets the preset standard.

[0011] By adopting the above technical solution, in the initial stage, by keeping the coating pressure unchanged, only adjusting the slit opening at the output end of the die head, and making measurements and judgments, the experimental process can be simplified, and more attention can be paid to the influence of the slit opening on the measurement data, providing a basis for the subsequent establishment of a correlation model. Based on the data and simulation calculations in the initial stage, the correlation model between the slit opening and the coating pressure is obtained, so that in subsequent production, the coating pressure can be adjusted more accurately according to the changes in the slit opening, thereby achieving more precise control and improving the quality stability of the coated products. When the slit opening changes, the coating pressure is adjusted accordingly, and the measurement is performed by a measuring instrument to ensure that the measurement data always meets the preset standards, which helps to correct deviations in real time, ensure the stability and reliability of the production process, and reduce the production of unqualified products. This control method that comprehensively considers the slit opening and the coating pressure can improve the control accuracy and efficiency of the entire coating process, reduce production costs, and enhance the competitiveness of products.

[0012] In a possible implementation of the present application, the method includes: Obtain key parameters of the coating process in real time; Get the transmission position of the electric actuator in real time; Real-time acquisition of the slit opening at the output end of the die; Real-time acquisition of the coating pressure value and pressure change curve at the input end of the die head; The key parameters, the transmission position, the slit opening, the coating pressure value and the pressure change curve are stored and displayed.

[0013] By adopting the above technical solutions, the key parameters of the coating process can be obtained in real time, and the operating status of the coating process can be fully and timely understood, providing a data basis for precise control. Real-time acquisition of the transmission position of the electric actuator and the slit opening at the output end of the die head can help accurately grasp the adjustment of the coating equipment and promptly discover and solve possible problems. Real-time acquisition of the coating pressure value and pressure change curve at the input end of the die head can better control the supply of coating and ensure the stability of coating quality. Storing and displaying various key parameters makes it convenient for operators to monitor and analyze the production process, discover potential problems in a timely manner, and provide data support for subsequent optimization and improvement. This real-time monitoring and data storage and display method can improve the transparency and controllability of the production process, and help improve production efficiency and product quality.

[0014] In a possible implementation manner of the present application, if the measurement data does not meet the preset standard, the step of adjusting the slit opening at the output end of the die head by the electric actuator until the measurement data meets the preset standard includes: Performing validity judgment on the measurement data acquired by the measuring instrument; If the measurement data is valid, calculating the lateral data deviation between the measurement data and the preset standard; Calculating a preset transmission position of the electric actuator based on the lateral data deviation; A command is sent to the electric actuator so that the actual transmission position of the electric actuator is equal to the preset transmission position.

[0015] By adopting the above technical solution, the validity of the measured data can be judged to ensure the accuracy of subsequent calculations and adjustments, and avoid erroneous operations based on invalid data. Calculating the lateral data deviation between the measured data and the preset standard can accurately determine the degree of adjustment required, thereby improving the pertinence and effectiveness of the adjustment. Calculating the preset transmission position of the electric actuator based on the lateral data deviation can achieve precise control so that the slit opening at the output end of the die head is adjusted to the appropriate position, so that the measured data meets the preset standard. Sending instructions to the electric actuator so that the actual transmission position is equivalent to the preset transmission position can ensure the accuracy and stability of the adjustment and improve the quality consistency of the coated product. The entire step can achieve automatic, fast and precise adjustment, reduce manual intervention, improve production efficiency and reduce production costs.

[0016] In a possible implementation of the present application, the method includes: Determine whether there is abnormal information in the measuring instrument, the electric actuator, the die input end and the die output end; If the abnormal information exists, a stop command is sent to the coating machine body and the measuring instrument; The fault prompt information corresponding to the abnormal information is sent to the user terminal.

[0017] By adopting the above technical solution, it is possible to timely detect whether there is abnormal information in the measuring instrument, electric actuator, die input end and die output end, thereby improving the reliability and stability of the system. When abnormal information exists, timely sending a stop command to the coater body and the measuring instrument can avoid further expansion of the fault, reduce equipment damage and production losses. Sending the fault prompt information corresponding to the abnormal information to the user terminal can enable the operator to understand the fault situation in time, quickly take corresponding solutions, shorten the fault handling time, and improve production efficiency. This fault monitoring and handling mechanism can effectively improve the safety and reliability of the production process and ensure the smooth progress of production.

[0018] In a possible implementation of the present application, the method includes: Determine the evaluation period of system performance; During the evaluation period, operation data of the coating operation is obtained, wherein the operation data includes the measurement data, the motion data of the electric actuator and the operation parameters of the die head; The operating data and preset indicators are compared and analyzed to evaluate the accuracy of the measurement data, the timeliness and stability of the control adjustment, and obtain an evaluation result.

[0019] By adopting the above technical solutions and determining the evaluation cycle of system performance, it is helpful to regularly conduct comprehensive inspections and evaluations of the system, discover potential problems in a timely manner, and ensure the stable operation of the system. Obtaining operating data including measurement data, action data of electric actuators, and operating parameters of the die head can fully understand the actual situation of the coating operation and provide accurate data support for the evaluation. Comparing and analyzing the operating data and preset indicators can objectively evaluate the accuracy of the measurement data, the timeliness and stability of the control adjustment, and thus discover the deficiencies of the system. The evaluation results are helpful for targeted system optimization and improvement, improving the performance and reliability of the system, and further improving the quality and production efficiency of coated products. This mechanism of regular evaluation and analysis can continuously improve the system, make it better adapt to production needs, and enhance the competitiveness of the enterprise.

[0020] The second purpose of this application is to provide a lateral closed-loop control system for an extrusion coating die head, the system comprising: Measurement data acquisition module: obtains the measurement data of the coating product measured by the measuring instrument; Measurement data judgment module: judge whether the measurement data meets the preset standard; Slit opening adjustment module: if the measurement data does not meet the preset standard, the slit opening at the output end of the die head is adjusted by the electric actuator until the measurement data meets the preset standard; Slit opening recording module: if the measurement data meets the preset standard, the transmission position of the electric actuator and the slit opening corresponding to the die output end are recorded.

[0021] By adopting the above technical solution, real-time monitoring and judgment of the measurement data of the coated products are realized, and the deviation between the measurement data and the preset standard can be discovered in time, thereby improving the controllability of the production process. By automatically adjusting the slit opening at the output end of the die through the electric actuator, it is possible to quickly respond to deviations and accurately adjust the coating parameters, thereby effectively improving the quality of the coated products. For the measurement data that meets the preset standards, recording the transmission position of the electric actuator and the corresponding slit opening at the output end of the die will facilitate subsequent data analysis and optimization, and provide a basis for the continuous improvement of the production process. Overall, the automation and accuracy of the lateral closed-loop control of the extrusion coating die are improved, the interference of human factors is reduced, and the production efficiency and stability are improved.

[0022] The third object of this application is to provide a lateral closed-loop control device for an extrusion coating die head, the device comprising: A memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and execute the above-mentioned extrusion coating die head lateral closed-loop control method.

[0023] The fourth objective of this application is to provide a storage medium.

[0024] The fourth application objective of this application is achieved through the following technical solutions: A storage medium stores a computer program that can be loaded by a processor and execute the above-mentioned extrusion coating die head lateral closed-loop control method.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Improve the intelligence level of the production process, reduce manual intervention, and reduce the impact of human errors on product quality.

[0026] 2. Enhanced the traceability of the production process. By recording and analyzing various data, the root cause of the problem can be discovered in a timely manner, providing strong support for improving production processes and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic flow chart of a transverse closed-loop control method for an extrusion coating die head provided in an embodiment of the present application; Figure 2 It is a virtual structural schematic diagram of the lateral closed-loop control system of the extrusion coating die provided in the embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.

[0030] The embodiments of the present application are further described in detail below in conjunction with the drawings in the specification.

[0031] The present application embodiment provides a lateral closed-loop control method for an extrusion coating die head, referring to Figure 1 , the main process of the method is described as follows: S1: Obtaining measurement data of the coated product measured by the measuring instrument; Among them, select a suitable measuring instrument to ensure that it can accurately measure the relevant parameters of the coated product, such as coating thickness, uniformity, etc. The measuring instrument is installed at an appropriate position in the coating production line so that it can measure the coated product in real time. The measuring instrument continuously measures the product during the coating process and transmits the measurement data to the control system in real time. The control system receives the measurement data transmitted by the measuring instrument, stores and processes it for subsequent analysis and judgment.

[0032] For example, high-precision laser measuring instruments or optical measuring instruments can be used to obtain measurement data of coated products. These measuring instruments can be installed at the exit of the coating machine to quickly and accurately measure the coated products. The measuring instrument transmits the measurement data in the form of digital signals to the control system, which can analyze and process the data in real time, thereby realizing real-time monitoring and adjustment of the coating process.

[0033] S2: Determine whether the measurement data meets the preset standard; Among them, the qualified range or standard value of the measurement data is determined according to the requirements and specifications of the coated product. The measurement data of the coated product transmitted by the measuring instrument is obtained in real time. The measurement data is compared with the preset standard, which can be achieved by a software program or algorithm. According to the comparison result, it is judged whether the measurement data is within the range of the preset standard. If it is within the range, it is considered to meet the preset standard; otherwise, it is considered not to meet the preset standard.

[0034] For example, in the thickness control of coated products, the preset standard may be that the thickness fluctuates within a certain range. When the measuring instrument obtains the thickness data of the coated product, the system compares these data with the preset thickness range. If the measured data is within the range, it is judged to meet the preset standard; if it is out of the range, it is judged to not meet the preset standard. In addition, some fault tolerance mechanisms or thresholds can be set to avoid misjudgment due to measurement errors or short-term fluctuations. At the same time, the judgment results can be recorded and counted for subsequent analysis and improvement.

[0035] S3: If the measured data does not meet the preset standard, adjusting the slit opening at the output end of the die head by the electric actuator until the measured data meets the preset standard; Among them, when it is judged that the measured data does not meet the preset standard, the control system sends an adjustment instruction to the electric actuator. After receiving the instruction, the electric actuator adjusts its position or action according to the requirements of the instruction. The movement of the electric actuator drives the adjustment mechanism at the output end of the die head, thereby changing the opening of the slit. Preferably, at the output end of the die head, a row of adjustable sliders is set, each slider corresponds to one side of the slit. The electric actuator is connected to these sliders through a connecting rod. When the electric actuator receives the instruction and executes the step number, it pushes the slider to move through the connecting rod. Assume that each step of the electric actuator corresponds to a certain distance of the slider, for example, each step pushes the slider to move 0.1 mm. The opening of the slit is determined by the position of the slider. When the slider moves in the direction close to the slit, the slit opening decreases; when the slider moves in the direction away from the slit, the slit opening increases. By accurately controlling the number of steps of the electric actuator, the position of the slider can be accurately determined, thereby achieving accurate adjustment of the slit opening.

[0036] During the process of adjusting the slit opening, the measuring instrument continuously measures the coated product and feeds back the real-time measurement data to the control system. The control system determines whether the preset standard is met based on the change in the measurement data. If it has not been met, the electric actuator is adjusted until the measurement data meets the preset standard.

[0037] For example, assuming that the preset standard is that the coating thickness is within a certain range, when the measured data shows that the coating thickness is too thick, the control system will instruct the electric actuator to reduce the slit opening at the die output end. The electric actuator makes the slit smaller through mechanical transmission and other means, thereby reducing the output of the slurry and gradually reducing the coating thickness. The measuring instrument continuously monitors the change in coating thickness, and when the thickness reaches the preset standard range, the control system stops adjusting the electric actuator.

[0038] S4: If the measurement data meets the preset standard, the transmission position of the electric actuator and the slit opening corresponding to the die output end are recorded.

[0039] Among them, when the measured data meets the preset standard, the control system triggers the data recording operation. The control system obtains the current transmission position information of the electric actuator and can read the relevant data through the communication interface with the electric actuator. At the same time, the control system obtains the slit opening information corresponding to the die output end, which may be obtained through a sensor or other measuring device. The transmission position of the electric actuator and the slit opening information corresponding to the die output end are associated and stored, which can be stored in a database, file or other suitable storage medium. In order to ensure the accuracy and completeness of the data, the recorded data can be verified and marked for subsequent query and analysis.

[0040] For example, the control system can communicate with the controller of the electric actuator to obtain the current transmission position code or value. For the slit opening at the output end of the die head, a displacement sensor or other measuring device can be used to monitor in real time and feed the measured value back to the control system. Then, this data is stored in a specific format, and the relevant timestamp and other necessary information are recorded. In this way, in the subsequent production process, analysis and optimization can be carried out based on these recorded data to improve coating quality and production efficiency.

[0041] Specifically, in some possible embodiments, the steps after recording the transmission position of the electric actuator and the slit opening corresponding to the die output end include: Analyzing the data recorded multiple times, the data including the transmission position of the electric actuator and the slit opening corresponding to the output end of the die head during multiple coating operations; Predict possible deviations based on the statistical results and operating trends of the data; Before the coating operation is performed, the slit opening at the output end of the die head is pre-adjusted by controlling the electric actuator to suppress the occurrence of the deviation in advance.

[0042] Among them, a data storage and management system is established to store data such as the transmission position of the electric actuator and the slit opening corresponding to the die output end during multiple coating operations. Data analysis tools or algorithms are used to process and analyze these data, such as calculating the average, standard deviation, trend line, etc. The data are classified and compared by comprehensively considering multiple factors, such as different product models, production batches, environmental conditions, etc. A deviation prediction model is established based on the results of data analysis. The model can use machine learning, statistics and other methods to predict possible deviations in the future based on the patterns and trends of historical data. The prediction model is continuously updated and optimized to improve the accuracy and reliability of the prediction. The prediction results are evaluated and verified in combination with actual production experience and professional knowledge. Before the coating operation starts, based on the predicted deviation results, the control system sends instructions to the electric actuator to adjust the slit opening at the die output end. The electric actuator accurately adjusts the slit opening according to the instructions to ensure that the slit opening is in the pre-set optimal state when the coating operation starts. During the coating operation, the measurement data is monitored in real time. If a large difference is found between the actual deviation and the predicted deviation, the slit opening is adjusted in time to ensure the coating quality.

[0043] For example, in actual production, coating data from the past period of time can be regularly collected and analyzed. Through the analysis of these data, it is found that when the product model is A, the transmission position of the electric actuator is within a certain range, and the slit opening usually needs to be adjusted to a specific value to avoid deviations. Based on this, when the product model A is produced next time, before the coating operation, the control system will automatically control the electric actuator to adjust the slit opening to the corresponding preset value based on the analysis results of the historical data, thereby suppressing the occurrence of deviations in advance. At the same time, during the coating operation, the measurement data is continuously monitored. If the actual situation is found to be deviated from the prediction, fine-tuning is performed in time to ensure the stability of the coating quality.

[0044] Specifically, in some possible embodiments, the method includes: In the initial stage, the coating pressure at the die input end is kept constant, the slit opening at the die output end is adjusted, and the measuring instrument is used to measure and determine whether the measurement data meets the preset standard; In the subsequent stage, based on the experimental data and simulation calculations of the initial stage, a correlation model between the slit opening at the output end of the die and the coating pressure at the input end of the die is obtained; When the slit opening at the die output end changes, the coating pressure at the die input end is adjusted accordingly, and each adjustment is followed by measurement by a measuring instrument to ensure that the measurement data always meets the preset standard.

[0045] In the initial stage: set the coating pressure at the die input end to a constant value and record the pressure value. Adjust the slit opening at the die output end through the control system and conduct multiple tests. After each adjustment of the slit opening, use a measuring instrument to measure the coated product and obtain measurement data. Compare the measurement data with the preset standard to determine whether it meets the requirements.

[0046] Subsequent stage: Collect the experimental data of the initial stage, including the measurement data under different slit openings and the corresponding coating pressure. Use simulation calculation software or algorithms to analyze and process the experimental data. According to the analysis results, the correlation model between the slit opening at the output end of the die and the coating pressure at the input end of the die is obtained. The correlation model is stored in the control system for subsequent use.

[0047] Adjustment stage: When the slit opening at the die output changes, the control system calculates the corresponding coating pressure adjustment value based on the correlation model. The control system adjusts the coating pressure at the die input to the calculated value. After each adjustment, the coating product is measured using a measuring instrument to obtain measurement data. The control system compares the measurement data with the preset standard to determine whether it meets the requirements. If not, continue to adjust the coating pressure until the measurement data meets the preset standard.

[0048] For example, in the initial stage, the coating pressure is set to 10MPa, and then the slit opening is adjusted to 1mm, 2mm, 3mm, etc., and the coating thickness and other parameters are measured using a measuring instrument after each adjustment. After collecting these data, simulation calculations are performed in the subsequent stage to obtain a correlation model between the slit opening and the coating pressure. For example, for every 1mm increase in the slit opening, the coating pressure needs to be reduced by 2MPa. In actual production, when the slit opening changes from 2mm to 3mm, the control system adjusts the coating pressure from 8MPa to 6MPa according to the correlation model, and then measures the coated product to ensure that the measurement data meets the preset standards.

[0049] Specifically, in some possible embodiments, the method includes: Obtain key parameters of the coating process in real time; Get the transmission position of the electric actuator in real time; Real-time acquisition of the slit opening at the output end of the die; Real-time acquisition of the coating pressure value and pressure change curve at the input end of the die head; The key parameters, the transmission position, the slit opening, the coating pressure value and the pressure change curve are stored and displayed.

[0050] Among them, corresponding sensors are installed at key parts of the coating equipment, such as sensors for measuring slurry flow rate, temperature, viscosity and other parameters near the coating head. These sensors transmit the real-time monitored data to the data acquisition system in the form of electrical signals. The electric actuator is equipped with a position sensor inside, which can feedback the precise position of its transmission parts in real time. The position sensor transmits the position information to the central control system through a data line or wireless communication. A high-precision displacement sensor is installed at the output end of the die head to measure the change of the slit opening. The displacement sensor sends the measured opening data to the control system in real time. A pressure sensor is installed at the input end of the die head to continuously monitor the pressure of the coating. The pressure sensor not only provides real-time pressure values, but also generates pressure change curves through data recording and processing. The key parameters, transmission position, slit opening, coating pressure value and pressure change curve are stored and displayed: After the central control system receives the data from each sensor and actuator, it organizes and encodes the data. The data is stored in a high-speed storage device, such as a server hard disk or a dedicated database system. At the same time, these data are displayed to operators in real time in the form of charts, numbers, etc. through display terminals such as computer monitors or industrial touch screens. Professional monitoring software can be used to analyze and warn the data in real time, and alarms can be issued in time when certain parameters exceed the preset range.

[0051] For example, a series of sensors and monitoring equipment are installed on the actual coating production line. When the production line is running, the temperature sensor measures the temperature of the slurry once a second and sends the data to the control system; the position sensor of the electric actuator feeds back the transmission position every 10 milliseconds; the pressure sensor continuously records the pressure change of the coating and generates the corresponding curve. These data are summarized and processed in the control system, and then stored in the database of the server, and displayed in the form of intuitive charts on the large screen in the operation room, so that the operator can view and monitor the production process at any time.

[0052] Specifically, in some possible embodiments, if the measurement data does not meet the preset standard, the step of adjusting the slit opening at the output end of the die head by the electric actuator until the measurement data meets the preset standard includes: Performing validity judgment on the measurement data acquired by the measuring instrument; If the measurement data is valid, calculating the lateral data deviation between the measurement data and the preset standard; Calculating a preset transmission position of the electric actuator based on the lateral data deviation; A command is sent to the electric actuator so that the actual transmission position of the electric actuator is equal to the preset transmission position.

[0053] Among them, a series of judgment rules for data validity are set, such as data integrity, reasonable range, etc. Check whether the measured data contains necessary parameters and information, such as the location and time of measurement. Compare the measured data with the preset reasonable value range. If it is within the range, it is considered valid, otherwise it is considered invalid. Obtain the corresponding standard value or range from the preset standard. Subtract the valid measured data from the standard value to obtain the lateral data deviation. If it is a range standard, determine whether the measured data is within the range, and the part beyond the range is the deviation. Establish a mathematical model or algorithm to convert the lateral data deviation into the distance or angle that the electric actuator needs to move. For example, if the deviation is larger, the distance that the electric actuator needs to move is longer. Send an instruction to the electric actuator so that the actual transmission position of the electric actuator is equal to the preset transmission position: the control system generates a control instruction, which contains the preset transmission position information that the electric actuator needs to reach. Send the instruction to the electric actuator through wired or wireless communication. After receiving the instruction, the electric actuator drives the internal motor or mechanical device to adjust the transmission position to the specified preset position.

[0054] For example, assuming that the preset standard is that the coating thickness should be 0.5 mm, and the measurement data obtained by the measuring instrument is 0.6 mm, the data is first judged to be valid. Then the deviation is calculated to be 0.1 mm. According to the pre-established algorithm, this 0.1 mm deviation corresponds to the electric actuator needing to move inward 5 units. The control system generates an instruction to instruct the electric actuator to move inward 5 units. The electric actuator receives and executes the instruction to adjust the slit opening at the output end of the die head.

[0055] Specifically, in some possible embodiments, the method includes: Determine whether there is abnormal information in the measuring instrument, the electric actuator, the die input end and the die output end; If the abnormal information exists, a stop command is sent to the coating machine body and the measuring instrument; The fault prompt information corresponding to the abnormal information is sent to the user terminal.

[0056] Among them, multiple monitoring points and corresponding sensors are set for the measuring instrument, electric actuator, die input end and die output end respectively. For example, a data transmission monitoring sensor is set for the measuring instrument to detect whether the data transmission is interrupted or abnormal; a position monitoring sensor and a current monitoring sensor are set for the electric actuator to detect whether its motion position is accurate and whether the working current is normal; a pressure sensor and a flow sensor are set for the die input end to monitor the pressure and flow of the input coating; an opening monitoring sensor and a temperature sensor are set for the die output end to monitor the slit opening and the temperature of the output end. The normal working range and threshold of each monitoring point are set. For example, the normal working current range of the electric actuator, the normal pressure range and flow range of the die input end, etc. are set. The sensor data of each monitoring point is collected in real time and transmitted to the central control system. The central control system analyzes and judges the received data. If the data of a certain monitoring point exceeds the set normal range or threshold, it is determined that there is abnormal information in this part. When the central control system determines that there is abnormal information, a stop command is immediately generated. The stop command is quickly transmitted to the control system of the coating machine body and the control system of the measuring instrument through wired or wireless communication. After receiving the stop command, the control system of the coating machine body immediately stops the operation of the coating machine, including stopping the supply of coating and stopping the movement of the die head. After receiving the stop command, the control system of the measuring instrument stops the data collection and transmission of the measuring instrument. The central control system determines the corresponding fault type and description based on the detected abnormal information. Generates fault prompt information containing detailed information such as fault type, occurrence time, possible cause, etc. The fault prompt information is sent to a pre-set user terminal through network communication (such as Ethernet, wireless network, etc.), such as the operator's mobile phone, computer or special monitoring terminal. After receiving the fault prompt information, the user terminal reminds the operator by pop-up window, text message, email, etc., so that the operator can understand the fault situation in time and take corresponding treatment measures.

[0057] For example, in actual operation, the pressure sensor at the die input detects that the pressure suddenly exceeds the upper limit of the normal range. After receiving this abnormal data, the central control system determines that there is an abnormality at the die input. A stop command is then generated and sent to the coater body and the measuring instrument to stop running. At the same time, a fault prompt message "The pressure at the die input is too high, possible reasons: pipe blockage or pressure pump failure" is generated and sent to the operator's mobile phone. After receiving the prompt, the operator can quickly go to the site for investigation and processing.

[0058] Specifically, in some possible embodiments, the method includes: Determine the evaluation period of system performance; During the evaluation period, operation data of the coating operation is obtained, wherein the operation data includes the measurement data, the motion data of the electric actuator and the operation parameters of the die head; The operating data and preset indicators are compared and analyzed to evaluate the accuracy of the measurement data, the timeliness and stability of the control adjustment, and obtain an evaluation result.

[0059] Among them, the evaluation cycle is determined by comprehensively considering factors such as the production scale, process complexity, and equipment operation status of the coating operation. For example, it can be set to be evaluated once a week, month, or quarter. Make an evaluation plan, clarify the start time and end time of each evaluation cycle, and arrange it in the production schedule. Establish a data acquisition system, connect it with the control system of the measuring instrument, electric actuator, and die head, and obtain relevant operation data in real time. The measuring instrument continuously measures the thickness, uniformity, viscosity and other parameters of the coated product, and transmits these data to the data acquisition system in real time. The control system of the electric actuator records the time, stroke, speed and other data of its action, and sends them to the data acquisition system regularly. Parameters including the temperature, pressure, and slit opening of the die head are measured and transmitted through sensors installed on the die head. According to the quality requirements of the coated product, production efficiency requirements, and equipment performance standards, determine indicators such as the accurate range of measurement data, the response time of control adjustment, and the allowable fluctuation range of stability. Use data analysis software or tools to process and analyze the acquired operation data. For example, calculate the mean and standard deviation of the measurement data, analyze the response time distribution of the electric actuator action, and observe the change trend of the die head operation parameters. Compare the analyzed operation data with the preset indicators one by one to evaluate whether the measured data is within the accurate range, whether the control adjustment is timely (such as whether the electric actuator can adjust the slit opening within the specified time), and whether the system operation is stable (such as whether the die head parameters fluctuate too much). Generate an evaluation report based on the comparative analysis. The report clearly points out the accuracy evaluation results of the measured data (such as accurate, basically accurate, inaccurate), the timeliness evaluation results of the control adjustment (such as timely, untimely) and the stability evaluation results (such as stable, unstable). Summarize and classify the evaluation results, for example, classify the problems into serious, general and minor levels. Feedback the evaluation results to relevant departments and personnel to provide a basis for improving system performance and optimizing the production process.

[0060] For example, suppose the evaluation cycle is once a month. Within a month, the data acquisition system collects daily coating thickness measurement data, the action time data of the electric actuator to adjust the slit opening, and the temperature and pressure change data of the die. The preset indicators are that the average coating thickness should be within 0.1 ± 0.01 mm, the electric actuator adjustment response time should not exceed 5 seconds, and the die temperature fluctuation should not exceed 5°C. Through data analysis, it was found that the average coating thickness this month was 0.11 mm, the average adjustment response time of the electric actuator was 4 seconds, and the maximum die temperature fluctuation reached 8°C. Compared with the preset indicators, the evaluation results are that the measurement data accuracy is basically accurate, the control adjustment is timely, and the stability is general, and the deviations and possible causes are detailed in the evaluation report.

[0061] Another embodiment of the present application provides a lateral closed-loop control system for an extrusion coating die head, wherein, referring to Figure 2 , the extrusion coating die head lateral closed-loop control system includes: The measurement data acquisition module 100 is used to acquire the measurement data of the coating product measured by the measuring instrument; The measurement data judging module 200 is used to judge whether the measurement data meets the preset standard; Slit opening adjustment module 300: if the measurement data does not meet the preset standard, the slit opening at the output end of the die head is adjusted by the electric actuator until the measurement data meets the preset standard; The slit opening recording module 400 records the transmission position of the electric actuator and the slit opening corresponding to the die output end if the measurement data meets the preset standard.

[0062] The extrusion coating die head lateral closed-loop control system provided in this embodiment can implement the various steps of the aforementioned embodiments due to the functions of its modules themselves and the logical connections between each other, and can therefore achieve the same technical effects as the aforementioned embodiments. The principle analysis can be found in the relevant description of the aforementioned extrusion coating die head lateral closed-loop control method steps, which will not be repeated here.

[0063] An embodiment of the present application further provides an extrusion coating die head lateral closed-loop control device, comprising a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and execute the above-mentioned extrusion coating die head lateral closed-loop control method.

[0064] An embodiment of the present application further provides a storage medium, in which a computer program capable of being loaded by a processor and executing the above-mentioned extrusion coating die head lateral closed-loop control method is stored.

[0065] The storage medium provided in this embodiment can achieve the same technical effects as the aforementioned embodiments because the computer program therein implements the various steps of the aforementioned embodiments after being loaded and run on the processor. The principle analysis can be found in the relevant description of the aforementioned method steps, which will not be repeated here.

[0066] The storage medium includes, for example, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0067] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0069] In addition, the term "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined, and is only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0070] Thus, any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0071] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lateral closed-loop control method for an extrusion coating die head, characterized in that: include: Acquire measurement data of the coated product measured by the measuring instrument; Determining whether the measurement data meets a preset standard; If the measured data does not meet the preset standard, the slit opening at the output end of the die head is adjusted by the electric actuator until the measured data meets the preset standard; If the measurement data meets the preset standard, the transmission position of the electric actuator and the slit opening corresponding to the die output end are recorded.

2. The method for lateral closed-loop control of an extrusion coating die head according to claim 1, characterized in that: The steps after recording the transmission position of the electric actuator and the slit opening corresponding to the die output end include: Analyzing the data recorded multiple times, the data including the transmission position of the electric actuator and the slit opening corresponding to the output end of the die head during multiple coating operations; Predict possible deviations based on the statistical results and operating trends of the data; Before the coating operation is performed, the slit opening at the output end of the die head is pre-adjusted by controlling the electric actuator to suppress the occurrence of the deviation in advance.

3. The method for lateral closed-loop control of an extrusion coating die head according to claim 1, characterized in that: The method comprises: In the initial stage, the coating pressure at the die input end is kept constant, the slit opening at the die output end is adjusted, and the measuring instrument is used to measure and determine whether the measurement data meets the preset standard; In the subsequent stage, based on the experimental data and simulation calculations of the initial stage, a correlation model between the slit opening at the output end of the die and the coating pressure at the input end of the die is obtained; When the slit opening at the die output end changes, the coating pressure at the die input end is adjusted accordingly, and each adjustment is followed by measurement by a measuring instrument to ensure that the measurement data always meets the preset standard.

4. The method for lateral closed-loop control of an extrusion coating die head according to claim 3, characterized in that: The method comprises: Obtain key parameters of the coating process in real time; Get the transmission position of the electric actuator in real time; Real-time acquisition of the slit opening at the output end of the die; Real-time acquisition of the coating pressure value and pressure change curve at the input end of the die head; The key parameters, the transmission position, the slit opening, the coating pressure value and the pressure change curve are stored and displayed.

5. The method for lateral closed-loop control of an extrusion coating die head according to claim 1, characterized in that: If the measurement data does not meet the preset standard, the step of adjusting the slit opening at the output end of the die head by the electric actuator until the measurement data meets the preset standard includes: Performing validity judgment on the measurement data acquired by the measuring instrument; If the measurement data is valid, then calculating the lateral data deviation between the measurement data and the preset standard; Calculating a preset transmission position of the electric actuator based on the lateral data deviation; A command is sent to the electric actuator so that the actual transmission position of the electric actuator is equal to the preset transmission position.

6. The method for lateral closed-loop control of an extrusion coating die head according to claim 1, characterized in that: The method comprises: Determine whether there is abnormal information in the measuring instrument, the electric actuator, the die input end and the die output end; If the abnormal information exists, a stop command is sent to the coating machine body and the measuring instrument; The fault prompt information corresponding to the abnormal information is sent to the user terminal.

7. The method for lateral closed-loop control of an extrusion coating die head according to claim 1, characterized in that: The method comprises: Determine the evaluation period of system performance; During the evaluation period, operation data of the coating operation is obtained, wherein the operation data includes the measurement data, the motion data of the electric actuator and the operation parameters of the die head; The operating data and preset indicators are compared and analyzed to evaluate the accuracy of the measurement data, the timeliness and stability of the control adjustment, and obtain an evaluation result.

8. Extrusion coating die head lateral closed loop control system, characterized in that: include: Measurement data acquisition module: obtains the measurement data of the coating product measured by the measuring instrument; Measurement data judgment module: judge whether the measurement data meets the preset standard; Slit opening adjustment module: if the measurement data does not meet the preset standard, the slit opening at the output end of the die head is adjusted by the electric actuator until the measurement data meets the preset standard; Slit opening recording module: if the measurement data meets the preset standard, the transmission position of the electric actuator and the slit opening corresponding to the die output end are recorded.

9. Extrusion coating die head lateral closed loop control equipment, characterized in that: include: A memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executes any one of the above-mentioned methods for controlling a lateral closed-loop extrusion coating die head according to claims 1-7.

10. A storage medium, characterized in that: The computer program is stored which can be loaded by a processor and execute the method for lateral closed-loop control of an extrusion coating die head according to any one of claims 1 to 7.

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