A temperature control method for screen printing

Abstract

The present invention provides a temperature control method for screen printing, which belongs to the field of temperature control and includes: step 1: collecting the real-time temperature of all preset working areas based on sensors; step 2: obtaining the historical working condition data of the printing production line, analyzing the historical working condition data, and determining the initial temperature upper and lower limits of each preset working area; step 3: obtaining the real-time working condition data of the printing production line, and determining the optimized temperature upper and lower limits of each preset working area in combination with the real-time temperature of the preset working area and the initial temperature upper and lower limits of each preset working area; step 4: determining the temperature control strategy based on the optimized temperature upper and lower limits of all preset areas, the real-time temperature and the real-time working condition data of the printing production line; step 5: obtaining the printing quality coefficient of the product, and if it does not meet the preset printing quality requirements, adjusting the temperature control strategy until it meets the preset printing quality requirements. The quality stability and production efficiency of screen printing are improved.

Description

Technical Field

[0001] The invention relates to the technical field of temperature control, and in particular to a temperature control method for screen printing. Background Art

[0002] Screen printing is a printing technology widely used in many fields, and is widely used in electronics, packaging, textiles and other industries. In the screen printing process, temperature is one of the key factors affecting printing quality and production efficiency. By controlling the appropriate temperature, the drying, fluidity and adhesion of the ink can be effectively ensured, thereby improving the printing quality of the product.

[0003] Existing screen printing production lines usually use a simple temperature control method based on a preset temperature range. This method relies on traditional fixed upper and lower temperature limits and fails to make dynamic adjustments based on the real-time working conditions and environmental changes of the production line. As the production process changes, such as humidity, equipment load and other factors, existing technologies often cannot accurately respond to temperature fluctuations, resulting in unstable printing quality and even equipment damage.

[0004] Therefore, the present invention provides a temperature control method for screen printing. Summary of the invention

[0005] The present invention provides a temperature control method for screen printing, which is used to dynamically optimize the upper and lower temperature limits of a working area by combining real-time temperature, historical working condition data and a printing quality coefficient, and iteratively adjust the control strategy, thereby realizing intelligent and precise temperature control, improving the quality stability and production efficiency of screen printing, and adapting to the needs of changing working conditions.

[0006] The present invention provides a temperature control method for screen printing, comprising:

[0007] Step 1: Collect the real-time temperature of all preset working areas based on sensors;

[0008] Step 2: Obtain historical operating data of the printing production line and analyze the historical operating data to determine the initial temperature upper and lower limits of each preset working area;

[0009] Step 3: Acquire the real-time working condition data of the printing production line, and determine the optimized temperature upper and lower limits of each preset working area in combination with the real-time temperature of the preset working area and the initial temperature upper and lower limits of each preset working area;

[0010] Step 4: Determine the temperature control strategy based on the optimized temperature upper and lower limits of all preset areas, the real-time temperature, and the real-time working condition data of the printing production line;

[0011] Step 5: Obtain the printing quality coefficient of the product. If it does not meet the preset printing quality requirements, adjust the temperature control strategy until it meets the preset printing quality requirements.

[0012] The present invention provides a temperature control method for screen printing, which collects the real-time temperature of all preset working areas based on preset sensors, including:

[0013] Determine the sensor type corresponding to each preset working area based on the preset working area-sensor type data table;

[0014] Corresponding sensors are deployed in each preset working area, and the real-time temperature of each preset working area is collected.

[0015] The invention provides a temperature control method for screen printing. Sensor types include: thermocouple, infrared temperature sensor and optical fiber sensor.

[0016] The present invention provides a temperature control method for screen printing, which obtains historical working condition data of a printing production line, analyzes the historical working condition data, and then determines the initial temperature upper and lower limits of each preset working area, including:

[0017] Acquire historical operating data and historical temperature data of the printing production line based on a preset database;

[0018] Analyze the correlation coefficient between the historical working condition data of the printing production line and the historical temperature data of each preset working area based on a preset analysis method;

[0019] Based on the correlation coefficient, the historical operating condition data of the printing production line and the historical temperature data of each preset working area, the initial temperature upper and lower limits of each preset working area are determined.

[0020] The present invention provides a temperature control method for screen printing, which obtains real-time working condition data of a printing production line, and determines the optimized temperature upper and lower limits of each preset working area in combination with the real-time temperature of the preset working area and the initial temperature upper and lower limits of each preset working area, including:

[0021] Monitor the real-time working condition data of the printing production line based on the preset monitoring device;

[0022] Based on the real-time working condition data of the printing production line, the real-time temperature of each preset working area, and the initial temperature upper and lower limits of each preset working area, the optimized temperature upper and lower limits of each preset working area are determined:

[0023]

[0024]

[0025] in, To optimize the upper temperature limit, To optimize the lower limit of temperature, is the temperature deviation of the i-th preset working area, is the temperature change rate of the i-th preset working area, is the upper limit of initial temperature, is the lower limit of initial temperature, is the influence coefficient of temperature deviation on the upper limit of optimized temperature, is the influence coefficient of the temperature change rate difference on the upper limit of the optimized temperature, is the influence coefficient of the jth operating condition data, is the influence coefficient of the temperature change rate difference on the lower limit of the optimized temperature, is the influence coefficient of temperature deviation on the lower limit of optimized temperature, is the jth operating condition data, and m is the number of operating condition data.

[0026] The present invention provides a temperature control method for screen printing, which determines a temperature control strategy based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature and the real-time working condition data of the printing production line, including:

[0027] Determine the dynamic response coefficient of each preset working area based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature and the real-time working condition data of the printing production line;

[0028] Determining the dynamic response coefficient of the system based on the dynamic response coefficients of all preset working areas;

[0029] Determine a number of corresponding control strategies based on the dynamic response coefficient of the system and a preset coefficient-strategy data table;

[0030] The control strategies are integrated based on a preset method to obtain a hybrid control strategy;

[0031] Determine the error between the real-time temperature of each preset working area and the upper and lower optimized temperature limits;

[0032] A temperature control signal is generated based on a hybrid control strategy, temperature error, real-time temperature, and real-time operating data of the printing production line.

[0033] The present invention provides a temperature control method for screen printing, which determines the dynamic response coefficient of each preset working area based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature and the real-time working condition data of the printing production line, including:

[0034] The dynamic response coefficient of each preset working area is determined based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature, and the real-time working condition data of the printing production line:

[0035]

[0036] in, is the dynamic response coefficient of the i-th preset working area, is the preset time influence coefficient, To optimize the upper temperature limit, To optimize the lower limit of temperature, is the preset reference temperature, as well as is the real-time temperature difference of the i-th preset working area at the t-th moment, is the time when the temperature data is delayed. is the real-time change of the j-th operating condition data at the t-th moment, is the time when the working condition data lags behind, is the weight of the jth working condition data, m is the number of working condition data, is the preset working condition influence adjustment coefficient, and lg is the logarithmic function.

[0037] The invention provides a temperature control method for screen printing, and a control strategy including: an MPC control strategy, a fuzzy control strategy and a PID control strategy.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] By combining real-time temperature, historical operating data and printing quality coefficient, dynamically optimizing the upper and lower temperature limits of the working area and iteratively adjusting the control strategy, intelligent and precise temperature control is achieved, improving the quality stability and production efficiency of screen printing, and adapting to changing operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 The figure is a flow chart of a temperature control method for screen printing provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] The embodiment of the present invention provides a temperature control method for screen printing, such as Figure 1 As shown, including:

[0045] Step 1: Collect the real-time temperature of all preset working areas based on sensors;

[0046] Step 2: Obtain historical operating data of the printing production line and analyze the historical operating data to determine the initial temperature upper and lower limits of each preset working area;

[0047] Step 3: Acquire the real-time working condition data of the printing production line, and determine the optimized temperature upper and lower limits of each preset working area in combination with the real-time temperature of the preset working area and the initial temperature upper and lower limits of each preset working area;

[0048] Step 4: Determine the temperature control strategy based on the optimized temperature upper and lower limits of all preset areas, the real-time temperature, and the real-time working condition data of the printing production line;

[0049] Step 5: Obtain the printing quality coefficient of the product. If it does not meet the preset printing quality requirements, adjust the temperature control strategy until it meets the preset printing quality requirements.

[0050] In this embodiment, the preset working area is a specific functional area defined in the printing device for temperature control and monitoring. The temperature of each area has an important impact on the printing quality. For example, in a screen printing machine, the ink drying area, the template area and the conveyor belt area can all be used as the preset working area.

[0051] In this embodiment, the upper and lower limits of the initial temperature are the temperature ranges obtained by analyzing the historical operating data of the printing equipment to ensure the temperature benchmark for the equipment to operate under normal working conditions. For example, the upper and lower limits of the initial temperature of a printing area are set to 50°C to 60°C to ensure that the ink can dry normally without cracking.

[0052] In this embodiment, the real-time working condition data is the status information collected in real time when the printing production line is running, including parameters such as speed, load, ambient temperature, humidity, etc. For example, the current conveyor belt speed is 1 m / s, the ambient temperature is 25°C, and the ink concentration is the standard value;

[0053] In this embodiment, the optimized temperature upper and lower limits are the working area temperature range dynamically adjusted based on the real-time operating condition data and the initial temperature upper and lower limits to adapt to the current operating conditions. If the ambient temperature rises, the original upper and lower limits of 50°C to 60°C may be optimized to 55°C to 65°C to maintain the drying effect.

[0054] In this embodiment, the temperature control strategy is a specific temperature control plan formulated based on the temperature requirements and real-time working conditions of each working area to guide the equipment execution. For example, the temperature of the drying area is set to 60°C, the temperature of the template area is maintained at 50°C, and the conveyor belt area is set to 40°C.

[0055] In this embodiment, the printing quality coefficient is a quantitative indicator for evaluating printing quality, which is used to determine whether the product meets the requirements. It is usually related to clarity, adhesion, color consistency, etc. For example, if the clarity and adhesion scores reach 95 points or more, the quality coefficient meets the requirements; otherwise, the temperature needs to be adjusted;

[0056] In this embodiment, the preset printing quality requirements are printing quality targets set according to customer needs and industry standards, and are used to measure whether the product is qualified. For example, a certain batch of printing requires clear pattern edges and high color consistency, and stipulates that the printing quality coefficient must not be less than 90 points.

[0057] The beneficial effects of the above technical solution are: by combining real-time temperature, historical operating data and printing quality coefficient, the upper and lower temperature limits of the working area are dynamically optimized, and the control strategy is iteratively adjusted to achieve intelligent and precise temperature control, thereby improving the quality stability and production efficiency of screen printing and adapting to changing operating conditions.

[0058] Example 2

[0059] An embodiment of the present invention provides a temperature control method for screen printing, which collects real-time temperatures of all preset working areas based on preset sensors, including:

[0060] Determine the sensor type corresponding to each preset working area based on the preset working area-sensor type data table;

[0061] Corresponding sensors are deployed in each preset working area, and the real-time temperature of each preset working area is collected.

[0062] In this embodiment, the preset working area-sensor type data table is an association table for matching different functional areas in the screen printing production line with applicable sensor types. Its purpose is to select and deploy appropriate sensors according to the functional characteristics, environmental conditions and measurement requirements of each working area to ensure the accuracy and pertinence of temperature data collection. For example, in area A, high-temperature thermocouples are deployed because of the need to monitor the high-temperature heating drying process. In area B, thermistors are deployed to detect the medium temperature range because the ink is sensitive to a lower temperature. In area C, the cooling environment is monitored and the use of ambient temperature sensors can meet the needs. In area D, UV curing requires accurate perception of the surface temperature, and it is more appropriate to deploy infrared temperature sensors.

[0063] The beneficial effects of the above technical solution are: by accurately matching the sensor type through the working area-sensor type data table, the screen printing temperature collection is efficient and targeted. The sensors are deployed based on regional needs, which improves the accuracy and response speed of temperature monitoring, adapts to complex process requirements, and ensures stable printing quality.

[0064] Example 3

[0065] The embodiment of the present invention provides a temperature control method for screen printing, and the sensor types include: a thermocouple, an infrared temperature sensor and an optical fiber sensor.

[0066] In this embodiment, the thermocouple generates voltage through temperature difference, is suitable for high temperature environment, has fast response speed and high accuracy, and is suitable for temperature monitoring in high temperature environment such as heating and drying areas;

[0067] In this embodiment, the infrared temperature sensor measures temperature by detecting infrared radiation, is non-contact, and is suitable for dynamic or special environments, and is suitable for areas with dynamic operation or high-precision monitoring during the printing process;

[0068] In this embodiment, the optical fiber sensor is resistant to electromagnetic interference and high temperature, suitable for precise measurement in complex environments, and suitable for temperature control in key areas where the environment is relatively harsh and requires high precision;

[0069] In this embodiment, in the drying stage of screen printing (working area A), due to the high temperature, thermocouple monitoring is deployed; in the ink adjustment stage (working area B), infrared temperature sensors are deployed to monitor the ink temperature in real time and non-contactly; in the precision production area (working area C), optical fiber sensors are deployed to ensure the temperature control accuracy in an anti-interference manner.

[0070] The beneficial effect of the above technical solution is that by combining multiple types of monitoring such as thermocouples, infrared temperature sensors and optical fiber sensors, all-round and accurate measurement of screen printing temperature control is achieved. Different sensors complement each other and meet the real-time monitoring needs in high temperature, dynamic and complex environments, significantly improving the accuracy and adaptability of the temperature control system.

[0071] Example 4

[0072] The embodiment of the present invention provides a temperature control method for screen printing, which obtains historical operating data of a printing production line, analyzes the historical operating data, and then determines the initial temperature upper and lower limits of each preset working area, including:

[0073] Acquire historical operating data and historical temperature data of the printing production line based on a preset database;

[0074] Analyze the correlation coefficient between the historical working condition data of the printing production line and the historical temperature data of each preset working area based on a preset analysis method;

[0075] Based on the correlation coefficient, the historical operating condition data of the printing production line and the historical temperature data of each preset working area, the initial temperature upper and lower limits of each preset working area are determined.

[0076] In this embodiment, the correlation coefficient is a numerical value used to quantify the degree of correlation between two variables, and refers to the correlation between the historical operating condition data of the printing production line and the historical temperature data of the preset working area. It is used to evaluate how the historical operating conditions affect the temperature of the working area and provide a basis for determining the upper and lower limits of the initial temperature. If the correlation coefficient between a certain parameter of the printing production line (such as the production speed) and the temperature of the drying area is 0.9, it means that the production speed is highly correlated with the temperature, and the upper and lower limits of the initial temperature of the drying area can be adjusted accordingly.

[0077] In this embodiment, the historical operating data of the printing production line refers to the operating records of each device and process flow on the production line, such as speed, pressure, humidity, operating time and other parameters, which provide data support for analyzing the relationship between temperature and production conditions. For example, historical operating data shows that when the production speed is 100 pieces / minute, the heating zone temperature is usually maintained at 180°C. This record can be used to determine the upper and lower limits of the initial temperature.

[0078] In this embodiment, the historical temperature data of each preset working area refers to the temperature data measured in each working area during the past production process, which is used to establish an association with the working condition data. Through the historical temperature data, the law of temperature change with the working condition is found. For example, the historical data shows that under different environmental humidity, the temperature fluctuation range of the ink coating area is 20°C-25°C, and the correlation between the temperature and humidity is analyzed accordingly;

[0079] In this embodiment, the upper and lower limits of the initial temperature of each preset working area are determined based on the analysis results of the correlation coefficient, historical operating data and historical temperature data. A reasonable initial temperature range is set for each working area to ensure stable printing quality and provide a reference range for real-time temperature control and subsequent optimization. For example, through data analysis, it is found that the optimal upper and lower limits of the initial temperature of the drying area are 180°C-200°C. This range can meet production requirements and maintain product quality.

[0080] The beneficial effects of the above technical solution are: through historical data analysis and correlation coefficient quantification, accurate initialization of the upper and lower limits of temperature control is achieved, the adaptability of the temperature control system to the variability of working conditions is enhanced, and the process stability and efficiency of screen printing are improved.

[0081] Example 5

[0082] The embodiment of the present invention provides a temperature control method for screen printing, which obtains real-time working condition data of a printing production line, and determines the optimized temperature upper and lower limits of each preset working area in combination with the real-time temperature of the preset working area and the initial temperature upper and lower limits of each preset working area, including:

[0083] Monitor the real-time working condition data of the printing production line based on the preset monitoring device;

[0084] Based on the real-time working condition data of the printing production line, the real-time temperature of each preset working area, and the initial temperature upper and lower limits of each preset working area, the optimized temperature upper and lower limits of each preset working area are determined:

[0085]

[0086]

[0087] in, To optimize the upper temperature limit, To optimize the lower limit of temperature, is the temperature deviation of the i-th preset working area, is the temperature change rate of the i-th preset working area, is the upper limit of initial temperature, is the lower limit of initial temperature, is the influence coefficient of temperature deviation on the upper limit of optimized temperature, is the influence coefficient of the temperature change rate difference on the upper limit of the optimized temperature, is the influence coefficient of the jth operating condition data, is the influence coefficient of the temperature change rate difference on the lower limit of the optimized temperature, is the influence coefficient of temperature deviation on the lower limit of optimized temperature, is the jth operating condition data, and m is the number of operating condition data.

[0088] In this embodiment, the influence coefficient of the temperature change rate difference on the optimized temperature lower limit reflects the adjustment weight of the temperature change rate on the optimized temperature lower limit. When the temperature drops too fast or fluctuates violently, the coefficient will enhance the adjustment range of the temperature lower limit to ensure the system's sensitivity to rapid temperature drops, thereby preventing the working area from being overcooled and affecting product quality.

[0089] In this embodiment, the influence coefficient of the temperature change rate difference on the optimized temperature upper limit reflects the weight of the temperature change rate on the adjustment of the optimized temperature upper limit. When the temperature rises too quickly, the coefficient will enhance the adjustment range of the temperature upper limit to prevent overheating from damaging the printing materials and process quality.

[0090] The beneficial effects of the above technical solution are: by combining real-time operating data, temperature deviation and change rate, the optimized temperature upper and lower limits of the working area are dynamically adjusted, the adaptability and accuracy of the temperature control system are achieved, and the multi-factor influencing coefficient optimization adjustment mechanism is utilized to significantly improve the flexibility and process stability of screen printing temperature control to meet complex production needs.

[0091] Example 6

[0092] The embodiment of the present invention provides a temperature control method for screen printing, which determines a temperature control strategy based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature, and the real-time working condition data of the printing production line, including:

[0093] Determine the dynamic response coefficient of each preset working area based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature and the real-time working condition data of the printing production line;

[0094] Determining the dynamic response coefficient of the system based on the dynamic response coefficients of all preset working areas;

[0095] Determine a number of corresponding control strategies based on the dynamic response coefficient of the system and a preset coefficient-strategy data table;

[0096] The control strategies are integrated based on a preset method to obtain a hybrid control strategy;

[0097] Determine the error between the real-time temperature of each preset working area and the upper and lower optimized temperature limits;

[0098] A temperature control signal is generated based on a hybrid control strategy, temperature error, real-time temperature, and real-time operating data of the printing production line.

[0099] In this embodiment, the dynamic response coefficient refers to the sensitivity of a preset working area to temperature changes under the current working conditions, and is used to reflect the flexibility and response speed of the temperature control system to real-time temperature adjustment. It is calculated by combining the upper and lower limits of the optimized temperature, the real-time temperature and the working condition data. According to the dynamic response coefficient, the system can adjust the temperature control strategy to meet the needs of different working areas. For example, in the ink coating area, when the production line speed increases and the real-time temperature deviates from the optimized range, the dynamic response coefficient may increase, prompting the system to speed up the adjustment of the temperature in this area.

[0100] In this embodiment, the preset coefficient-strategy data table is a database that associates dynamic response coefficients with corresponding control strategies. According to different dynamic response coefficient ranges, the data table recommends the most suitable control strategy for the system, providing a basis for automatically selecting a temperature control strategy. For example, if the dynamic response coefficient is between 0.1 and 0.3, it is recommended to use a temperature gentle adjustment strategy; if the dynamic response coefficient is between 0.4 and 0.7, it is recommended to use a fast response strategy; if the dynamic response coefficient is between 0.8 and 1.0, it is recommended to use an emergency adjustment strategy;

[0101] In this embodiment, the control strategy refers to the specific way in which the system adjusts the temperature under different conditions, including heating, cooling, insulation or quick response mode, to ensure that the temperature operates stably within a preset range and improve printing quality. For example, in the heating and drying area, when the temperature is below the lower limit, the system adopts a rapid heating strategy. In the cooling area, when the temperature approaches the upper limit, the system adopts a gradual cooling strategy.

[0102] In this embodiment, the preset method is an algorithm or process rule used by the system to integrate multiple control strategies. It can be a weighted average method, a priority selection method, etc., which integrates multiple strategies according to different control requirements to form an optimal hybrid control strategy. For example, using the weighted average method, the weight of the fast response strategy is set to 0.7, and the weight of the smooth adjustment strategy is set to 0.3, and they are integrated into a more targeted control strategy;

[0103] In this embodiment, the hybrid control strategy is a comprehensive strategy formed by combining multiple control strategies. It can take into account multiple needs, such as fast response and temperature stability, achieve efficient temperature control under complex working conditions, and adapt to multi-zone and multi-target requirements. For example, in the ink adjustment area, when the real-time temperature deviation is large, the hybrid control strategy can take into account the needs of rapid heating and gradual and stable temperature increase at the same time to achieve precise temperature control.

[0104] In this embodiment, the temperature control signal is the final output electronic instruction, which is used to drive the heater, cooling device or other temperature control equipment to achieve real-time temperature adjustment, execute temperature control strategies, and achieve temperature regulation of each working area. For example, if the real-time temperature is lower than the lower limit, the control signal instructs the heating equipment to run at 500W power. If the real-time temperature is higher than the upper limit, the control signal instructs the cooling equipment to start and adjust to 80% load operation.

[0105] The beneficial effects of the above technical solution are: through the dynamic response coefficient and coefficient-strategy data table, combined with multi-strategy fusion and error analysis, the accuracy and intelligence of screen printing temperature control are achieved, the system dynamic response and hybrid control strategy optimize the temperature control signal generation process, and improve the temperature control efficiency and printing stability under complex working conditions, meeting the high-precision requirements of multiple scenarios.

[0106] Example 7

[0107] The embodiment of the present invention provides a temperature control method for screen printing, which determines the dynamic response coefficient of each preset working area based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature and the real-time working condition data of the printing production line, including:

[0108] The dynamic response coefficient of each preset working area is determined based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature, and the real-time working condition data of the printing production line:

[0109]

[0110] in, is the dynamic response coefficient of the i-th preset working area, is the preset time influence coefficient, To optimize the upper temperature limit, To optimize the lower limit of temperature, is the preset reference temperature, as well as is the real-time temperature difference of the i-th preset working area at the t-th moment, is the time when the temperature data is delayed. is the real-time change of the j-th operating condition data at the t-th moment, is the time when the working condition data lags and affects the time. is the weight of the jth working condition data, m is the number of working condition data, is the preset working condition influence adjustment coefficient, and lg is the logarithmic function.

[0111] In this embodiment, the preset time influence coefficient is used to measure the influence of time on temperature change, reflecting the importance of the temperature control system to past temperature change data in real-time adjustment. The larger the coefficient, the higher the system's reliance on past data; the smaller the coefficient, the more the system relies on current real-time data;

[0112] In this embodiment, the temperature data lag impact moment indicates the length of time that the historical temperature data affects the current temperature control decision, that is, the historical range of temperature changes considered by the system. The farther the temperature data lag impact moment is, the system makes adjustments based on the temperature change trend over a longer period of time. If the temperature data lag impact moment is closer, the system only considers recent temperature changes.

[0113] In this embodiment, the lag impact moment of the working condition data indicates the length of time that the historical working condition data affects the current temperature control strategy, focusing on analyzing the historical range of working condition changes of the production line. The farther away, the system will regulate based on the working condition trend of a longer period of time, and the closer it is, the more attention will be paid to the most recent working condition;

[0114] In this embodiment, the preset working condition influence adjustment coefficient represents the weight of working condition data on the dynamic response coefficient, and is used to measure the importance of different types of working condition data (such as production speed, humidity, and pressure) on temperature adjustment. The higher the coefficient, the greater the influence of the working condition data on temperature control.

[0115] The beneficial effect of the above technical solution is: by introducing a dynamic response coefficient and combining real-time temperature changes with working condition data, the adaptive adjustment of the screen printing temperature control system is realized. Through the influence of time and working condition lag, weight distribution and logarithmic function optimization, the accuracy and sensitivity of temperature control are ensured, and the temperature control efficiency and printing quality stability under complex working conditions are significantly improved.

[0116] Example 8

[0117] The embodiment of the present invention provides a temperature control method for screen printing, and the control strategy includes: MPC control strategy, fuzzy control strategy and PID control strategy.

[0118] In this embodiment, MPC is an advanced control method based on mathematical models to predict future system behavior. It uses the real-time status and model of the system to predict future temperature change trends, and calculates the optimal control input in advance based on the optimization algorithm. It is suitable for complex systems with multiple inputs and multiple outputs (MIMO), especially for control under constraints. It is suitable for screen printing production lines with multiple temperature zones and complex dynamic changes. For example, when the temperature of multiple working areas is monitored at the same time and coordinated adjustments are required, MPC can provide an efficient solution. In printing production, if the real-time temperature of the ink adjustment area is close to the upper limit, MPC control will predict the future temperature trend and adjust the operation of the cooling equipment in advance to ensure that the temperature is stable within the optimization range;

[0119] In this embodiment, fuzzy control is a control method based on fuzzy logic theory, which is suitable for systems that are difficult to establish accurate mathematical models. The system is controlled by fuzzy rules (such as "if the temperature is too high, cool quickly"), which does not require clear mathematical equations to describe. It is suitable for areas in the printing production line where the temperature dynamic characteristics are complex or difficult to accurately model. For example, when the temperature in the drying area fluctuates rapidly, the fuzzy control can be quickly adjusted according to the rules. In the drying area, when the real-time temperature is slightly lower than the lower limit, the fuzzy control strategy will trigger the "gradual heating" mode according to the rules, adjust the power of the heating equipment, and avoid excessive temperature fluctuations;

[0120] In this embodiment, PID control is a classic and widely used feedback control strategy that adjusts the control signal by proportional, integral and differential adjustment of the system deviation (the difference between the actual value and the target value).

[0121] The beneficial effects of the above technical solution are: by integrating MPC, fuzzy control and PID control strategies, the intelligent, multi-level adaptability and precision of screen printing temperature control are innovatively realized. MPC provides global optimization and dynamic prediction, fuzzy control copes with complex nonlinear working conditions, and PID achieves fast and precise adjustment. The three work together to take into account both real-time and stability, effectively improve printing quality and production efficiency, and meet diversified process requirements.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A temperature control method for screen printing, characterized in that: include: Step 1: Collect the real-time temperature of all preset working areas based on sensors; Step 2: Obtain historical operating data of the printing production line and analyze the historical operating data to determine the initial temperature upper and lower limits of each preset working area; Step 3: Acquire the real-time working condition data of the printing production line, and determine the optimized temperature upper and lower limits of each preset working area in combination with the real-time temperature of the preset working area and the initial temperature upper and lower limits of each preset working area; Step 4: Determine the temperature control strategy based on the optimized temperature upper and lower limits of all preset areas, the real-time temperature, and the real-time working condition data of the printing production line; Step 5: Obtain the printing quality coefficient of the product. If it does not meet the preset printing quality requirements, adjust the temperature control strategy until it meets the preset printing quality requirements; The temperature control strategy is determined based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature, and the real-time working condition data of the printing production line, including: Determine the dynamic response coefficient of each preset working area based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature and the real-time working condition data of the printing production line; Determining the dynamic response coefficient of the system based on the dynamic response coefficients of all preset working areas; Determine a number of corresponding control strategies based on the dynamic response coefficient of the system and a preset coefficient-strategy data table; The control strategies are integrated based on a preset method to obtain a hybrid control strategy; Determine the error between the real-time temperature of each preset working area and the upper and lower optimized temperature limits; A temperature control signal is generated based on a hybrid control strategy, temperature error, real-time temperature, and real-time operating data of the printing production line.

2. A temperature control method for screen printing according to claim 1, characterized in that: Collect real-time temperature of all preset working areas based on preset sensors, including: Determine the sensor type corresponding to each preset working area based on the preset working area-sensor type data table; Corresponding sensors are deployed in each preset working area, and the real-time temperature of each preset working area is collected.

3. A temperature control method for screen printing according to claim 2, characterized in that: Sensor types, including: thermocouples, infrared temperature sensors, and fiber optic sensors.

4. A temperature control method for screen printing according to claim 1, characterized in that: Obtain the historical operating data of the printing production line and analyze the historical operating data to determine the initial temperature upper and lower limits of each preset working area, including: Acquire historical operating data and historical temperature data of the printing production line based on a preset database; Analyze the correlation coefficient between the historical working condition data of the printing production line and the historical temperature data of each preset working area based on a preset analysis method; Based on the correlation coefficient, the historical operating condition data of the printing production line and the historical temperature data of each preset working area, the initial temperature upper and lower limits of each preset working area are determined.

5. The temperature control method for screen printing according to claim 1, characterized in that: The real-time working condition data of the printing production line is obtained, and the optimized temperature upper and lower limits of each preset working area are determined in combination with the real-time temperature of the preset working area and the initial temperature upper and lower limits of each preset working area, including: Monitor the real-time working condition data of the printing production line based on the preset monitoring device; Based on the real-time working condition data of the printing production line, the real-time temperature of each preset working area, and the initial temperature upper and lower limits of each preset working area, the optimized temperature upper and lower limits of each preset working area are determined: in, To optimize the upper temperature limit, To optimize the lower limit of temperature, is the temperature deviation of the i-th preset working area, is the temperature change rate of the i-th preset working area, is the upper limit of initial temperature, is the lower limit of initial temperature, is the influence coefficient of temperature deviation on the upper limit of optimized temperature, is the influence coefficient of the temperature change rate difference on the upper limit of the optimized temperature, is the influence coefficient of the jth operating condition data, is the influence coefficient of the temperature change rate difference on the lower limit of the optimized temperature, is the influence coefficient of temperature deviation on the lower limit of optimized temperature, is the jth operating condition data, and m is the number of operating condition data.

6. A temperature control method for screen printing according to claim 1, characterized in that: The dynamic response coefficient of each preset working area is determined based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature, and the real-time working condition data of the printing production line, including: The dynamic response coefficient of each preset working area is determined based on the optimized temperature upper and lower limits of all preset working areas, the real-time temperature, and the real-time working condition data of the printing production line: in, is the dynamic response coefficient of the i-th preset working area, is the preset time influence coefficient, To optimize the upper temperature limit, To optimize the lower limit of temperature, is the preset reference temperature, as well as is the real-time temperature difference of the i-th preset working area at the t-th moment, is the time when the temperature data is delayed. is the real-time change of the j-th operating condition data at the t-th moment, is the time when the working condition data lags behind, is the weight of the jth working condition data, m is the number of working condition data, is the preset working condition influence adjustment coefficient, and lg is the logarithmic function.

7. A temperature control method for screen printing according to claim 1, characterized in that: Control strategies include: MPC control strategy, fuzzy control strategy and PID control strategy.

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