A safety control and early warning system for screen printing

Abstract

The present invention provides a screen printing safety control and early warning system, belonging to the field of control and early warning technology. The system comprises: a demand module, which determines the target function of screen printing and the type of printing parameters to be monitored based on the target function according to the screen printing process; a data acquisition module, which collects real-time printing data during the printing process using sensors installed that match the printing parameter types; an analysis module, which standardizes the real-time printing data and analyzes the screen printing safety risk score, including an accuracy safety risk score and an operational safety risk score; a control module, which determines the warning level of the safety risk score and generates control instructions; and an optimization module, which executes the control instructions to obtain screen printing safety control results, compares them with preset control results, and optimizes the control process. This improves printing stability and product quality, optimizes production efficiency, and reduces failures and costs.

Description

Technical Field

[0001] The present invention relates to the technical field of control and early warning, and in particular to a safety control and early warning system for screen printing. Background Art

[0002] Screen printing is a widely used printing technology in electronics, textiles, packaging and other industries. Although screen printing is efficient and precise, in actual production, inaccurate screen printing control and insufficient safety warnings lead to problems such as low printing efficiency and inaccurate printing results.

[0003] Therefore, the present invention proposes a safety control and early warning system for screen printing. Summary of the Invention

[0004] The present invention provides a screen printing safety control and early warning system, which is used to determine the target function and monitoring parameters of screen printing through a demand module, a data acquisition module to obtain printing data in real time, an analysis module to calculate the safety risk score, a control module to issue early warnings and generate control instructions, and an optimization module to compare and optimize control results, thereby improving the safety and accuracy of the printing process.

[0005] In one aspect, the present invention provides a screen printing safety control and early warning system, comprising:

[0006] Demand module: Determine the target function of screen printing and the type of printing parameters that need to be monitored based on the target function according to the screen printing process;

[0007] Data acquisition module: Based on the installation of sensors consistent with the printing parameter type, real-time printing data during the printing process is collected in real time;

[0008] Analysis module: After normalizing the real-time printing data, analyze the safety risk score of screen printing, wherein the safety risk score includes: accuracy safety risk score and operation safety risk score;

[0009] Control module: determines the warning level of the security risk score and generates control instructions;

[0010] Optimization module: executes control instructions to obtain screen printing safety control results, compares them with preset control results, and optimizes the control process.

[0011] On the other hand, the demand module includes:

[0012] Process determination unit: determines the screen printing process based on printing purpose;

[0013] Functional indicator unit: Determine the target function of printing according to the screen printing process, and screen the types of printing parameters that need to be monitored based on the function-parameter library.

[0014] On the other hand, the data acquisition module includes:

[0015] Sensor selection unit: selects a device group to be monitored in the screen printing process according to the target function of the screen printing process, obtains the type of device to be monitored in the device group from the type of printing parameters to be monitored, and selects a sensor type consistent with each type to be monitored;

[0016] Position unit: According to the device structure diagram of each device in the device group, the installation position of the corresponding sensor under the sensor type consistent with the corresponding device is selected and marked to obtain the sensor installation position layout diagram.

[0017] The data acquisition module includes:

[0018] Sensor matching unit: assigning a unique first number to each sensor installation position in the sensor installation position layout diagram and assigning a unique second number to each sensor;

[0019] According to the corresponding relationship of the installed numbers, sensors are configured for the corresponding devices, and real-time printing data during the printing process is collected in real time.

[0020] On the other hand, the analysis module includes:

[0021] Standardization unit: acquires real-time printing data of all devices, and standardizes the real-time printing data according to printing parameter types to obtain standard printing data;

[0022] Positioning accuracy risk unit: if the printing parameter type belongs to the precision control type, obtain CCD fixed-point positioning monitoring parameters and obtain CCD printing image parameters, construct a first screen-printed image based on the printing image parameters, and grayscale process the first image to obtain a second image;

[0023] Using an edge recognition algorithm to identify pixels with uneven grayscale distribution in the second image, and marking them as edge points, to obtain a third image containing all edge points;

[0024] Map the third image and the screen printing standard image into the standard coordinate system, determine the grayscale mapping error between the third image and the screen printing standard image, and obtain the accuracy safety risk score of the screen printing:

[0025] ;in, represents the accuracy security risk score of the third image, represents the horizontal grayscale value of the i-th pixel of the third image, represents the vertical grayscale value of the i-th pixel of the third image, represents the horizontal fractional mapping coefficient, represents the vertical fractional mapping coefficient, represents the transpose of the reference transformation matrix, represents the lateral gain function, represents the longitudinal gain function, m represents the preset standard intercept of the CCD fixed-point positioning monitoring parameter, Indicates the preset standard angle of the CCD fixed-point positioning monitoring parameter, n indicates that the third image has a total of n pixels, Indicates the horizontal grayscale value of the i-th pixel in the standard image. Indicates the vertical grayscale value of the i-th pixel in the standard image.

[0026] On the other hand, the analysis module further includes:

[0027] Operation risk unit: If the printing parameter type belongs to the operation parameter type, obtain the standard printing data of the operation parameter and obtain the operation safety risk score as follows:

[0028] ;in, Indicates the operational security risk score, represents the preset risk impact coefficient of the jth operating parameter, k represents a total of k operating parameters, It represents the standard printing data value of the jth operating parameter at the pth time node, and p represents a total of p time nodes. represents the p-th time node of the j-th operating parameter, Indicates the lowest valley parameter value at the b-th time node, represents the error coefficient, represents the standard time interval, represents the j-th preset standard parameter value, ( ) represents the risk score conversion function.

[0029] On the other hand, the control module includes:

[0030] Risk assessment unit: Generates a risk comparison table based on historical recommendations from the expert database and the warning level assessed by security risk score type;

[0031] Obtaining the type of the screen printing security risk score, and obtaining the risk warning level according to the risk comparison table;

[0032] Control unit: generates a control adjustment accuracy standard range for the corresponding equipment based on the type of safety risk score and the risk warning level, obtains the deviation between the control adjustment accuracy standard range and the actual output, and obtains an adjustment proportional coefficient based on the deviation and the control algorithm;

[0033] The adjustment proportional coefficient, deviation and standard control coefficient are combined to form a control model, the control output of all devices is calculated, and the control output is converted into control instructions for the corresponding devices through the control system.

[0034] On the other hand, the optimization module further includes:

[0035] Execution unit: distributes all control instructions to the corresponding devices for execution, and obtains the screen printing security control results after the devices execute them;

[0036] Optimization unit: compares the safety control result with the preset target value to obtain the control error; analyzes and determines the control link with problems based on the characteristics of the error, and adjusts the control model.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The present invention provides a screen printing safety control and early warning system, which is used to determine the target function and monitoring parameters of screen printing through a demand module, a data acquisition module to obtain printing data in real time, an analysis module to calculate the safety risk score, a control module to issue early warnings and generate control instructions, and an optimization module to compare and optimize control results, thereby improving the safety and accuracy of the printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to 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 any creative work.

[0040] Figure 1 It is a structural diagram of a screen printing safety control and early warning system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0042] Example 1:

[0043] like Figure 1 As shown, an embodiment of the present invention provides a screen printing safety control and early warning system, comprising:

[0044] Demand module: Determine the target function of screen printing and the type of printing parameters that need to be monitored based on the target function according to the screen printing process;

[0045] Data acquisition module: Based on the installation of sensors consistent with the printing parameter type, real-time printing data during the printing process is collected in real time;

[0046] Analysis module: After normalizing the real-time printing data, analyze the safety risk score of screen printing, wherein the safety risk score includes: accuracy safety risk score and operation safety risk score;

[0047] Control module: determines the warning level of the security risk score and generates control instructions;

[0048] Optimization module: executes control instructions to obtain screen printing safety control results, compares them with preset control results, and optimizes the control process.

[0049] In this embodiment, screen printing is a commonly used printing technology that forms patterns or texts by transferring ink to the surface of a substrate through a printing screen (usually made of a silk screen).

[0050] In this embodiment, the process refers to a series of specific operating steps and methods, including: designing a pattern, selecting appropriate materials and inks, setting a screen, adjusting printing parameters, etc.

[0051] In this embodiment, the target function refers to the key goals that are desired to be achieved during the screen printing process, including: high-precision printing, stable production process, printing quality control, etc.

[0052] In this embodiment, the printing parameter type refers to key parameters that need to be monitored in real time during the screen printing process, including: screen tension, temperature, pressure, speed, flow rate, etc.

[0053] In this embodiment, the sensor is a device for real-time acquisition of physical quantities consistent with the type of printing parameters, including tension, pressure, temperature, flow, and the like.

[0054] In this embodiment, the real-time printing data refers to the data on various key parameters of the printing process that are continuously collected and transmitted by sensors during the screen printing process, including tension, pressure, temperature, flow rate, and the like.

[0055] In this embodiment, standardization refers to the process of converting the printing data collected in real time into a unified and standardized format and unit.

[0056] In this embodiment, the safety risk score is an indicator used to measure and evaluate potential risks in the screen printing process.

[0057] In this embodiment, the precision safety risk score refers to an indicator of the risk caused by deviation in printing precision during the printing process.

[0058] In this embodiment, the operational safety risk score is an indicator for evaluating the risk level associated with the equipment operational status, operating environment, and safety during the screen printing process.

[0059] In this embodiment, the warning level refers to the risk level of the current process.

[0060] In this embodiment, the control instruction refers to a specific operation instruction for adjusting the printing process issued by the system based on the security risk score and warning level provided by the analysis module.

[0061] In this embodiment, the safety control result refers to the result of parameters such as safety, accuracy, and quality during the printing process achieved after the control instruction generated by the control module is executed.

[0062] In this embodiment, the preset control result refers to an ideal result defined according to pre-set goals, standards and expected performance indicators during the screen printing process.

[0063] In this embodiment, optimization refers to adjusting and improving various parameters and operations in the printing process by executing control instructions to ensure that the final result is closer to the preset control target.

[0064] The working principle and beneficial effects of the above technical solution are: by real-time monitoring of key parameters in the printing process, analyzing safety risks and generating early warning instructions, optimizing the control process, improving the safety and accuracy of screen printing, reducing the occurrence of failures, and ensuring production stability and high-quality output.

[0065] Example 2:

[0066] Based on the above embodiment 1, the demand module includes:

[0067] Process determination unit: determines the screen printing process based on printing purpose;

[0068] Functional indicator unit: Determine the target function of printing according to the screen printing process, and screen the types of printing parameters that need to be monitored based on the function-parameter library.

[0069] In this embodiment, the printing purpose refers to achieving specific production goals or requirements, such as printing quality, production efficiency, printing materials, cost, etc.

[0070] In this embodiment, the function-parameter library is a database containing the relationship between printing processes and target functions.

[0071] The working principle and beneficial effects of the above technical solution are: by clarifying the printing purpose to determine the process flow, combining the function-parameter library to screen key monitoring parameters, ensuring precise control and optimization of the printing process, improving production efficiency and product quality, and reducing the rejection rate.

[0072] Example 3:

[0073] Based on the above embodiment 2, the data acquisition module includes:

[0074] Sensor selection unit: selects a device group to be monitored in the screen printing process according to the target function of the screen printing process, obtains the type of device to be monitored in the device group from the type of printing parameters to be monitored, and selects a sensor type consistent with each type to be monitored;

[0075] Position unit: According to the device structure diagram of each device in the device group, the installation position of the corresponding sensor under the sensor type consistent with the corresponding device is selected and marked to obtain the sensor installation position layout diagram.

[0076] In this embodiment, the device group refers to an entire set consisting of multiple devices or components.

[0077] In this embodiment, the equipment includes: a printing press, a drying device, a transmission system, etc.

[0078] In this embodiment, the device structure diagram is a detailed technical schematic diagram showing the various components and modules of the device.

[0079] In this embodiment, the installation position refers to the specific position where the sensor is installed in each device group to monitor various parameters of the device.

[0080] In this embodiment, the sensor installation position layout diagram is a diagram that details the installation positions of each sensor in the device.

[0081] The working principle and beneficial effects of the above technical solution are: by selecting monitoring equipment according to the target function, matching the sensor type and rationally arranging the installation location, ensuring that the sensor accurately collects the required data, improving the monitoring accuracy and efficiency of the screen printing process, and optimizing production quality and stability.

[0082] Example 4:

[0083] Based on the above embodiment 2, the data acquisition module includes:

[0084] Sensor matching unit: assigning a unique first number to each sensor installation position in the sensor installation position layout diagram and assigning a unique second number to each sensor;

[0085] According to the corresponding relationship of the installed numbers, sensors are configured for the corresponding devices, and real-time printing data during the printing process is collected in real time.

[0086] In this embodiment, the first number is a unique number that identifies the position of the sensor in the device.

[0087] In this embodiment, the second number is a unique number for identifying the sensor.

[0088] The working principle and beneficial effects of the above technical solution are: by configuring a unique number for each sensor, ensuring the precise matching of the sensor and the equipment, collecting data during the printing process in real time, improving data tracking and management efficiency, and providing reliable data support for subsequent analysis and optimization.

[0089] Example 5:

[0090] Based on the above embodiment 1, the analysis module includes:

[0091] Standardization unit: acquires real-time printing data of all devices, and standardizes the real-time printing data according to printing parameter types to obtain standard printing data;

[0092] Positioning accuracy risk unit: if the printing parameter type belongs to the precision control type, obtain CCD fixed-point positioning monitoring parameters and obtain CCD printing image parameters, construct a first screen-printed image based on the printing image parameters, and grayscale process the first image to obtain a second image;

[0093] Using an edge recognition algorithm to identify pixels with uneven grayscale distribution in the second image, and marking them as edge points, to obtain a third image containing all edge points;

[0094] Map the third image and the screen printing standard image into the standard coordinate system, determine the grayscale mapping error between the third image and the screen printing standard image, and obtain the accuracy safety risk score of the screen printing:

[0095] ;in, represents the accuracy security risk score of the third image, represents the horizontal grayscale value of the i-th pixel of the third image, represents the vertical grayscale value of the i-th pixel of the third image, represents the horizontal fractional mapping coefficient, represents the vertical fractional mapping coefficient, represents the transpose of the reference transformation matrix, represents the lateral gain function, represents the longitudinal gain function, m represents the preset standard intercept of the CCD fixed-point positioning monitoring parameter, Indicates the preset standard angle of the CCD fixed-point positioning monitoring parameter, n indicates that the third image has a total of n pixels, Indicates the horizontal grayscale value of the i-th pixel in the standard image. Indicates the vertical grayscale value of the i-th pixel in the standard image.

[0096] In this embodiment, the standard printing data refers to data obtained after standardization processing based on the real-time printing data of the device.

[0097] In this embodiment, the CCD fixed-point positioning monitoring parameters refer to parameters acquired by the CCD sensor for determining the positioning accuracy and position of the printed image, including positioning parameters, rotation angles, and the like.

[0098] In this embodiment, the CCD printing image parameters refer to a series of parameters related to the screen printing image obtained by the CCD sensor, including: a preset standard intercept, a preset standard angle, etc.

[0099] In this embodiment, the first image is an image constructed based on CCD fixed-point positioning monitoring parameters and CCD printing image parameters.

[0100] In this embodiment, grayscale processing is the process of converting a color image into a grayscale image, converting the color value of each pixel (usually the value of the three RGB channels) into a value representing brightness.

[0101] In this embodiment, the second image is an image obtained by performing grayscale processing on the first image.

[0102] In this embodiment, the edge recognition algorithm is an image processing technology used to detect areas with significant grayscale changes in an image, that is, edges in the image.

[0103] In this embodiment, an edge point refers to a pixel point in an image where the grayscale value changes significantly.

[0104] In this embodiment, the third image is an image obtained by identifying all edge points of the second image.

[0105] In this embodiment, the grayscale mapping error refers to the grayscale value difference between the third image and the screen printing standard image during the image comparison process.

[0106] In this embodiment, the screen printing standard image represents the best standard printing quality in the screen printing process.

[0107] In this embodiment, the standard coordinate system provides a unified, fixed reference point or spatial framework in which the coordinates of all images are mapped to the same location.

[0108] In this embodiment, the grayscale value is a numerical value used to represent the brightness or color depth of an image in image processing.

[0109] In this embodiment, the preset standard intercept is used to describe the lateral or longitudinal deviation when the CCD sensor positions the image.

[0110] In this embodiment, the preset standard angle represents the angle difference between the CCD image sensor and the standard image reference system.

[0111] The working principle and beneficial effects of the above technical solution are: through standardized printing data and precision risk assessment, using CCD positioning and grayscale processing technology, identifying edge points in the image, calculating grayscale mapping errors and evaluating precision risks, effectively monitoring screen printing accuracy, and improving production quality and stability.

[0112] Example 6:

[0113] Based on the above embodiment 5, the analysis module further includes:

[0114] Operation risk unit: If the printing parameter type belongs to the operation parameter type, obtain the standard printing data of the operation parameter and obtain the operation safety risk score as follows:

[0115] ;in, Indicates the operational security risk score, represents the preset risk impact coefficient of the jth operating parameter, k represents a total of k operating parameters, It represents the standard printing data value of the jth operating parameter at the pth time node, and p represents a total of p time nodes. represents the p-th time node of the j-th operating parameter, Indicates the lowest valley parameter value at the b-th time node, represents the error coefficient, represents the standard time interval, represents the j-th preset standard parameter value, ( ) represents the risk score conversion function.

[0116] In this embodiment, the lowest parameter value refers to the lowest value of a specific parameter within a certain time interval in the operating parameter data sequence.

[0117] The working principle and beneficial effects of the above technical solution are: by analyzing the standard data of operating parameters, combining preset risk factors and error factors, calculating the operation safety risk score, and evaluating the potential risks in the operation process in real time, ensuring stable operation of equipment, and improving production safety and efficiency.

[0118] Example 7:

[0119] Based on the above embodiment 1, the control module includes:

[0120] Risk assessment unit: Generates a risk comparison table based on historical recommendations from the expert database and the warning level assessed by security risk score type;

[0121] Obtaining the type of the screen printing security risk score, and obtaining the risk warning level according to the risk comparison table;

[0122] Control unit: generates a control adjustment accuracy standard range for the corresponding equipment based on the type of safety risk score and the risk warning level, obtains the deviation between the control adjustment accuracy standard range and the actual output, and obtains an adjustment proportional coefficient based on the deviation and the control algorithm;

[0123] The adjustment proportional coefficient, deviation and standard control coefficient are combined to form a control model, the control output of all devices is calculated, and the control output is converted into control instructions for the corresponding devices through the control system.

[0124] In this embodiment, the expert database refers to a database containing a large amount of experience knowledge, professional opinions and historical data.

[0125] In this embodiment, historical suggestions refer to guiding opinions and recommendations for security risk assessment and control adjustments obtained through expert databases, data analysis, historical events, and accumulated experience.

[0126] In this embodiment, the risk comparison table is a table that maps and determines corresponding warning levels according to different types of risk scores.

[0127] In this embodiment, the control adjustment accuracy standard range refers to the range of adjustment accuracy required by the control unit for each device or process at the risk warning level generated according to the safety risk assessment.

[0128] In this embodiment, the deviation refers to the difference between the actual output and the target output.

[0129] In this embodiment, the proportionality coefficient is a parameter in a control system, which is used to adjust the behavior of the device according to the deviation of the system (the difference between the actual output and the target output) to reduce the deviation and improve the accuracy.

[0130] In this embodiment, the control algorithm is a mathematical method used to calculate and adjust the device control output based on the deviation, adjustment proportionality coefficient, risk warning level and other relevant factors.

[0131] In this embodiment, the control model is a mathematical framework or algorithm designed to calculate the control output required by the device based on the input deviation, risk warning level, and adjustment proportionality coefficient.

[0132] In this embodiment, the standard control coefficient refers to a parameter used to describe the control accuracy, response speed or system stability of the device in the control system.

[0133] In this embodiment, the control output is the final result of the control model.

[0134] The working principle and beneficial effects of the above technical solution are: through the safety risk assessment and early warning mechanism, combined with the control algorithm to generate the precision adjustment range, the equipment output is adjusted in real time to ensure the accuracy and stability of the screen printing process, improve production efficiency and quality, reduce risks and optimize control accuracy.

[0135] Example 8:

[0136] Based on the above embodiment 7, the optimization module further includes:

[0137] Execution unit: distributes all control instructions to the corresponding devices for execution, and obtains the screen printing security control results after the devices execute them;

[0138] Optimization unit: compares the safety control result with the preset target value to obtain the control error; analyzes and determines the control link with problems based on the characteristics of the error, and adjusts the control model.

[0139] In this embodiment, the characteristics refer to the laws and features of the error during its change process, such as error convergence, error frequency characteristics, error phase linearity characteristics, etc.

[0140] In this embodiment, the control link refers to each interactive part between the system input, output and feedback in the control system.

[0141] The working principle and beneficial effects of the above technical solution are: through the execution and optimization unit, the control instructions in the screen printing process are adjusted in real time, the safety control results are compared with the target values, the errors are analyzed and the control model is optimized, the system accuracy and stability are improved, and the production quality and process control capabilities are effectively improved.

[0142] 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 various embodiments of the present invention.

Claims

1. A screen printing safety control and early warning system, characterized in that: include: Demand module: Determine the target function of screen printing and the type of printing parameters that need to be monitored based on the target function according to the screen printing process; Data acquisition module: Based on the installation of sensors consistent with the printing parameter type, real-time printing data during the printing process is collected in real time; Analysis module: After normalizing the real-time printing data, analyze the security risk score of screen printing, wherein the security risk score includes: Precision safety risk score and operational safety risk score; Control module: determines the warning level of the safety risk score and generates control instructions; Optimization module: executes control instructions to obtain screen printing safety control results, compares them with preset control results, and optimizes the control process; The analysis module includes: Standardization unit: acquires real-time printing data of all devices, and standardizes the real-time printing data according to printing parameter types to obtain standard printing data; Positioning accuracy risk unit: If the printing parameter type belongs to the precision control type, obtain CCD fixed-point positioning monitoring parameters and obtain CCD printing image parameters, construct a first screen-printed image based on the printing image parameters, and perform grayscale processing on the first image to obtain a second image; Using an edge recognition algorithm to identify pixels with uneven grayscale distribution in the second image, and marking them as edge points, to obtain a third image containing all edge points; Map the third image and the screen printing standard image into the standard coordinate system, determine the grayscale mapping error between the third image and the screen printing standard image, and obtain the accuracy safety risk score of the screen printing: ； Where D1 represents the accuracy security risk score of the third image, represents the horizontal grayscale value of the i-th pixel of the third image, represents the vertical grayscale value of the i-th pixel of the third image, represents the horizontal fractional mapping coefficient, represents the vertical fractional mapping coefficient, represents the transpose of the reference transformation matrix, represents the lateral gain function, represents the longitudinal gain function, Indicates the preset standard intercept of the CCD fixed-point positioning monitoring parameters, Indicates the preset standard angle of the CCD fixed-point positioning monitoring parameter, n indicates that the third image has a total of n pixels, Indicates the horizontal grayscale value of the i-th pixel in the standard image. Represents the vertical grayscale value of the i-th pixel in the standard image; The analysis module further includes: an operation risk unit: if the printing parameter type belongs to an operation parameter type, obtaining the standard printing data of the operation parameter and obtaining an operation safety risk score: ； Among them, D2 represents the operational safety risk score, represents the preset risk impact coefficient of the jth operating parameter, k represents a total of k operating parameters, It represents the standard printing data value of the jth operating parameter at the pth time node, and p represents a total of p time nodes. represents the p-th time node of the j-th operating parameter, represents the lowest valley parameter value at the bth time node, e represents the error coefficient, represents the standard time interval, represents the j-th preset standard parameter value, and L() represents the risk score conversion function.

2. A screen printing safety control and early warning system according to claim 1, characterized in that: The demand module includes: Process determination unit: determines the screen printing process based on printing purpose; Functional indicator unit: Determine the target function of printing according to the screen printing process, and screen the types of printing parameters that need to be monitored based on the function-parameter library.

3. A screen printing safety control and early warning system according to claim 2, characterized in that: The data acquisition module includes: Sensor selection unit: selects a device group to be monitored in the screen printing process according to the target function of the screen printing process, obtains the type of device to be monitored in the device group from the type of printing parameters to be monitored, and selects a sensor type consistent with each type to be monitored; Position unit: According to the device structure diagram of each device in the device group, the installation position of the corresponding sensor under the sensor type consistent with the corresponding device is selected and marked to obtain the sensor installation position layout diagram.

4. A screen printing safety control and early warning system according to claim 3, characterized in that: The data acquisition module includes: Sensor matching unit: assigning a unique first number to each sensor installation position in the sensor installation position layout diagram and assigning a unique second number to each sensor; According to the corresponding relationship of the installed numbers, sensors are configured for the corresponding devices, and real-time printing data during the printing process is collected in real time.

5. The screen printing safety control and early warning system according to claim 1, characterized in that: The control module includes: Risk assessment unit: Generates a risk comparison table based on historical recommendations from the expert database and the warning level assessed by security risk score type; Obtaining the type of the screen printing security risk score, and obtaining the risk warning level according to the risk comparison table; Control unit: generates a control adjustment accuracy standard range for the corresponding equipment based on the type of safety risk score and the risk warning level, obtains the deviation between the control adjustment accuracy standard range and the actual output, and obtains an adjustment proportional coefficient based on the deviation and the control algorithm; The adjustment proportional coefficient, deviation and standard control coefficient are combined to form a control model, the control output of all devices is calculated, and the control output is converted into control instructions for the corresponding devices through the control system.

6. A screen printing safety control and early warning system according to claim 5, characterized in that: The optimization module further includes: Execution unit: distributes all control instructions to the corresponding devices for execution, and obtains the screen printing security control results after the devices execute them; Optimization unit: compares the safety control result with the preset target value to obtain the control error; analyzes and determines the control link with problems based on the characteristics of the error, and adjusts the control model.

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