Circuit control system in diffusion plate coating production process

Abstract

This invention relates to the field of coating control technology and discloses a circuit control system for the diffusion plate coating production process. The system includes a circuit information monitoring module, a substrate grading module, a division module, an analysis module, a current threshold setting module, and a protection module. By real-time monitoring of the input voltage and current of the drive motor, combined with the accurate calculation of the voltage quality index by the analysis module, the voltage fluctuation pattern can be predicted in advance, providing a reliable basis for the formulation of coating strategies. It makes full use of the characteristics of voltage quality at different time periods, rationally allocates production resources, and improves overall production efficiency and product quality. At the same time, due to the different flatness of the substrate, the coating flow rate of the coating machine changes continuously, which will cause changes in the load of the coating machine and ultimately lead to changes in the input current. Therefore, the current threshold is dynamically adjusted according to the coating strategy, and the protection module issues an early warning in time when the input current exceeds the threshold, ensuring the safe and stable operation of the coating machine under various working conditions.

Description

Technical Field

[0001] This invention relates to the field of coating control technology, specifically to a circuit control system in the diffusion plate coating production process. Background Technology

[0002] As a crucial type of optical material, diffuser plates are widely used in numerous fields such as liquid crystal displays and lighting. In the manufacturing process of diffuser plates, the coating process is one of the core steps determining the final quality and performance of the product. Among these steps, the coating machine, as a key piece of equipment in the coating process, is directly related to the stability of its operation and the coating quality, thus affecting the core performance indicators of the diffuser plate, such as optical uniformity and light transmittance.

[0003] In the coating production stage of diffuser plates, the circuit control system of the coating machine has a direct impact on the coating quality. As far as the technology is concerned, most circuit control systems only have basic voltage and current display functions, which can only display the current value, but cannot perform comprehensive and in-depth monitoring and analysis of input voltage and input current. In addition, these systems often only focus on the basic start and stop control functions of the motor.

[0004] However, the aforementioned technologies still have significant shortcomings. For example, the circuit control systems of existing coating machines are only equipped with basic voltage and current display functions, capable of displaying only the current voltage and current values. They cannot conduct comprehensive and in-depth monitoring and analysis of the input voltage and current, making it difficult to obtain dynamic change patterns and potential quality information. Furthermore, because these systems often focus only on the basic start and stop control functions of the motor, they lack more refined and intelligent control methods for the motor's operation. This results in the inability to formulate a scientifically sound coating strategy based on the actual voltage conditions during the diffusion plate coating process, making it difficult to accurately set the current threshold that matches the coating strategy. Consequently, it is impossible to issue timely warnings when abnormal input current occurs, ultimately affecting the coating quality of the diffusion plate and failing to effectively guarantee the core performance indicators such as optical uniformity and transmittance. Summary of the Invention

[0005] The purpose of this invention is to provide a circuit control system for the diffusion plate coating process, solving the following technical problems:

[0006] How to optimize the circuit control system in the diffusion plate coating production process.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A circuit control system for the diffusion plate coating process, the circuit control system comprising:

[0009] The circuit information monitoring module is used to monitor the input voltage and input current of the coating machine drive motor;

[0010] The substrate grading module is used to perform flatness testing on all substrates to be tested and to rate all substrates based on the test results.

[0011] The segmentation module is used to divide 24 hours into several basic time units according to preset intervals;

[0012] The analysis module is used to analyze the input voltage of each basic time unit within a preset working day in the past to obtain the voltage quality index of each basic time unit; and to determine the coating strategy based on the voltage quality index of each basic time unit.

[0013] The current threshold setting module is used to determine the current threshold according to the coating strategy;

[0014] The protection module is used to issue an early warning when the input current exceeds the current threshold.

[0015] As a further aspect of the present invention: the first The process of obtaining the voltage quality index of each basic time unit is as follows:

[0016] S1: Obtain the... The curves showing the change of input voltage over time for each basic time unit over a preset working day in the past;

[0017] S2: According to the first The input voltage variation curves over time for the past preset working days of each basic time unit are analyzed to obtain the first... Characteristic indices of each basic time unit;

[0018] S3: According to the... The characteristic indices of the first basic time unit are analyzed to obtain the first... The number of features at each characteristic time point in a basic time unit;

[0019] S4: In the The input voltage of each basic time unit changes over time over the past preset working days. The number of characteristic time points are selected at equal intervals on the curve.

[0020] S5: Analyze the input voltage values ​​corresponding to characteristic time points of past preset working days and the input voltage variation curves over time for past preset working days to obtain the first... Voltage quality index for each basic time unit.

[0021] As a further aspect of the present invention: in step S2, the first The characteristic indices of each basic time unit are obtained as follows:

[0022] S21: By analyzing the past preset workdays, each day... The input voltage variation curve of each basic time unit is analyzed to obtain the number of extreme points on the curve, the time and input voltage value corresponding to the extreme points;

[0023] S22: Mark the times corresponding to the daily extreme points of past preset workdays on the same time axis;

[0024] S23: The first timeline on this timeline Each basic time unit is divided into several reference time units at equal time intervals;

[0025] S24: Analyze the number of extreme points in each reference time unit and the corresponding input voltage value of each extreme point to obtain the characteristic index of the reference time unit;

[0026] S25: The characteristic index corresponding to the maximum value in the characteristic index of the reference time unit is the [missing value]. Characteristic indices of each basic time unit.

[0027] As a further aspect of the present invention: through formula one:

[0028] ;

[0029] Calculate the first Characteristic index of any reference time unit of a basic time unit ;

[0030] in, For any reference time unit; This represents the number of extreme points in this reference time unit. ; This is the average input voltage value for this reference time unit; This is the average input voltage value of the previous reference time unit; For this reference time unit The input voltage value at each extreme point; The first weighting coefficient; This is the second weighting coefficient; This is the first preset constant; This is the second preset constant.

[0031] As a further aspect of the present invention: In step S3, formula two is used:

[0032] ;

[0033] Calculate the first Number of features at each basic time unit's characteristic time point ;

[0034] in, The number of basic features is preset; For the first Characteristic indices of each basic time unit; Preset constants for the features; To Round up.

[0035] As a further aspect of the present invention: the voltage quality index includes a voltage deviation index and a voltage stability index;

[0036] As one embodiment of the present invention, formula three is used:

[0037] ;

[0038] The voltage deviation index ;

[0039] in, The number of working days is preset in the past. ; The first day of the previously preset workday The curve of input voltage versus time; For the first The start time of each basic time unit; The preset interval duration; This is the rated voltage.

[0040] As a further aspect of the present invention: through formula four:

[0041] ;

[0042] Calculate the first Voltage quality index of each basic time unit ;

[0043] in, The first day of the previously preset workday Heavenly The first basic time unit The input voltage value at each characteristic time point.

[0044] As a further aspect of the present invention: the first The process of determining the coating strategy for each basic time unit is as follows:

[0045] Voltage deviation index With voltage deviation threshold Compare;

[0046] Voltage stability index With voltage stability threshold Compare;

[0047] when , At that time, the substrate with low flatness is treated at the first preset coating speed;

[0048] when , At that time, the high-flatness substrate is processed at the first preset coating speed;

[0049] when , At that time, the high-flatness substrate is processed at the second preset coating speed;

[0050] when , Stop processing the substrate when the time comes;

[0051] when , Stop processing the substrate when the time comes;

[0052] when When that happens, stop processing the substrate.

[0053] As a further aspect of the present invention: the preset range of the current threshold is as follows: ;

[0054] When the coating strategy is to process the low-flatness substrate at a first preset coating speed, the first... The current threshold of each basic time unit is ;

[0055] When the coating strategy is to process a high-flatness substrate at a first preset coating speed, the first... The current threshold of each basic time unit is ; The first adjustment parameter is 1.1. ;

[0056] When the coating strategy is to process the high-flatness substrate at the second preset coating speed, the first The current threshold of each basic time unit is ;

[0057] When the coating strategy is to stop processing the substrate, the first The current threshold of each basic time unit is ; This is the second adjustment parameter. .

[0058] As a further aspect of the present invention, the substrate is rated as high flatness or low flatness.

[0059] The beneficial effects of this invention are:

[0060] (1) This invention monitors the input voltage and current of the drive motor in real time by the circuit information monitoring module and calculates the voltage quality index accurately by the analysis module. This allows for early insight into the voltage fluctuation pattern and provides a reliable basis for the formulation of coating strategies. This solution makes full use of the characteristics of voltage quality at different time periods, rationally allocates production resources, and improves overall production efficiency and product quality. At the same time, due to the different flatness of the substrate, the coating flow rate of the coating machine changes continuously, which will cause changes in the load of the coating machine and ultimately lead to changes in the input current. Therefore, the current threshold setting module dynamically adjusts the current threshold according to the coating strategy, and the protection module issues an early warning when the input current exceeds the threshold, further ensuring the safe and stable operation of the coating machine under various working conditions.

[0061] (2) This invention accurately determines the input voltage condition of each basic time unit by comparing the voltage deviation index with the threshold and the voltage stability index with the threshold; based on different combinations of deviation and stability, it formulates targeted coating strategies, such as processing low-flatness substrates when the deviation is small and the stability is high, and processing high-flatness substrates when the deviation is large and the stability is high. This can effectively adapt to different voltage conditions, rationally allocate coating resources, avoid the decline in coating quality due to voltage problems, ensure the stable and efficient operation of the coating process, and improve the overall coating effect. Attached Figure Description

[0062] The invention will now be further described with reference to the accompanying drawings.

[0063] Figure 1 This is a system module framework diagram of one embodiment of the present invention. Detailed Implementation

[0064] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] Please see Figure 1 As shown, in one embodiment, a circuit control system for the diffusion plate coating process is provided, suitable for a coating machine, the circuit control system comprising:

[0066] The circuit information monitoring module is used to monitor the input voltage and input current of the coating machine drive motor;

[0067] The substrate grading module is used to perform flatness testing on all substrates to be tested and to rate all substrates based on the test results.

[0068] The segmentation module is used to divide 24 hours into several basic time units according to preset intervals;

[0069] The analysis module is used to analyze the input voltage of each basic time unit within a preset working day in the past to obtain the voltage quality index of each basic time unit; and to determine the coating strategy based on the voltage quality index of each basic time unit.

[0070] The current threshold setting module is used to determine the current threshold according to the coating strategy;

[0071] The protection module is used to issue an early warning when the input current exceeds the current threshold.

[0072] Through the above technical solution, this embodiment monitors the input voltage and input current of the coating machine drive motor through the circuit information monitoring module; performs flatness detection on all substrates to be tested through the substrate grading module, and grades all substrates according to the detection results; divides 24 hours into several basic time units according to a preset interval through the division module; then analyzes the input voltage of each basic time unit in the past preset working days through the analysis module to obtain the voltage quality index of each basic time unit; and determines the coating strategy based on the voltage quality index of each basic time unit; then determines the current threshold according to the coating strategy through the current threshold setting module; finally, the protection module issues an early warning when the input current exceeds the current threshold.

[0073] By configuring the circuit information monitoring module to monitor the input voltage and current of the drive motor in real time, combined with the analysis module's precise calculation of the voltage quality index, this embodiment can anticipate voltage fluctuation patterns and provide a reliable basis for formulating coating strategies. For example, when the voltage quality is high, substrates with lower flatness can be prioritized for processing. Substrates with lower flatness have more stringent requirements for the coating process, requiring larger adjustments or more frequent adjustments to parameters such as the coating machine's speed and tension control. Only under stable voltage conditions can the coating machine more accurately and stably adjust these parameters, effectively avoiding problems such as uneven coating thickness, missed coatings, or accumulation. This minimizes coating defects caused by substrate issues and voltage instability, ensuring coating quality. Conversely, when the voltage quality is relatively low... During certain time periods, the system can focus on processing substrates with higher flatness. Because substrates with good flatness require less adjustment range or fewer adjustment times during the coating process, basic coating quality can still be guaranteed even with voltage fluctuations. The technical solution provided in this embodiment fully utilizes the characteristics of voltage quality at different time periods, rationally allocates production resources, and improves overall production efficiency and product quality. At the same time, due to the different flatness of the substrate, the frequency and amplitude of the coating flow rate of the coating machine are also different, which will cause changes in the load of the coating machine and ultimately lead to changes in the input current. Therefore, the current threshold setting module dynamically adjusts the current threshold according to the coating strategy, and the protection module issues an early warning when the input current exceeds the threshold, further ensuring the safe and stable operation of the coating machine under various working conditions.

[0074] It should be noted that the preset interval can be one hour, 30 minutes, or other durations, and will not be detailed here.

[0075] It should be noted that the method for testing the flatness of the substrate is existing technology. The flatness is compared with a preset flatness comparison value. The substrate with a flatness higher than the preset flatness comparison value is determined to have high flatness; the substrate with a flatness lower than the preset flatness comparison value is determined to have low flatness.

[0076] As one embodiment of the present invention, the first The process of obtaining the voltage quality index of each basic time unit is as follows:

[0077] S1: Obtain the... The curves showing the change of input voltage over time for each basic time unit over a preset working day in the past;

[0078] S2: According to the first The input voltage variation curves over time for the past preset working days of each basic time unit are analyzed to obtain the first... Characteristic indices of each basic time unit;

[0079] S3: According to the... The characteristic indices of the first basic time unit are analyzed to obtain the first... The number of features at each characteristic time point in a basic time unit;

[0080] S4: In the The input voltage of each basic time unit changes over time over the past preset working days. The number of characteristic time points are selected at equal intervals on the curve.

[0081] S5: Analyze the input voltage values ​​corresponding to characteristic time points of past preset working days and the input voltage variation curves over time for past preset working days to obtain the first... Voltage quality index of each basic time unit;

[0082] Through the above settings, this embodiment analyzes the input voltage variation curve over time based on past preset working days, fully considering the patterns and trends of historical data. This makes the obtained characteristic index more representative and reliable, accurately capturing the inherent characteristics of voltage changes. Secondly, based on the characteristic index, the number of characteristic time points is further determined, and characteristic time points are selected at equal intervals. This method of selecting characteristic time points avoids arbitrariness and ensures that the selected time points can fully cover the key information of voltage changes, laying a solid foundation for the subsequent accurate calculation of the voltage quality index. Finally, by analyzing the input voltage values ​​and overall variation curves corresponding to the characteristic time points of past preset working days, the resulting voltage quality index can truly and objectively reflect the comprehensive level of voltage quality within the basic time unit. This provides an extremely important reference for the operation management, fault diagnosis, and optimization of the power system, helping to improve the stability and reliability of the power system, ensure the power quality for users, and reduce economic losses and safety hazards caused by voltage quality problems.

[0083] As one embodiment of the present invention, in step S2, the first The characteristic indices of each basic time unit are obtained as follows:

[0084] S21: By analyzing the past preset workdays, each day... The input voltage variation curve of each basic time unit is analyzed to obtain the number of extreme points on the curve, the time and input voltage value corresponding to the extreme points;

[0085] S22: Mark the times corresponding to the daily extreme points of past preset workdays on the same time axis;

[0086] S23: The first timeline on this timeline Each basic time unit is divided into several reference time units at equal time intervals;

[0087] S24: Analyze the number of extreme points in each reference time unit and the corresponding input voltage value of each extreme point to obtain the characteristic index of the reference time unit;

[0088] S25: The characteristic index corresponding to the maximum value in the characteristic index of the reference time unit is the [missing value]. Characteristic indices of each basic time unit;

[0089] Through the above technical solution, this embodiment first obtains extreme point information by analyzing the input voltage change curve in detail, laying a solid data foundation for subsequent analysis and ensuring accurate and reliable results. Second, by marking the extreme point times of different dates on the same axis, the distribution pattern can be presented intuitively, making it easier to discover periodic or trend changes. Third, by subdividing the basic time unit into reference time units, the analysis becomes more refined, capturing details of changes in short time intervals and improving sensitivity and accuracy. Finally, by combining the number of extreme points and the input voltage value, the characteristic index of the reference time unit is determined, and the maximum value is selected as the characteristic index of the basic time unit, which can represent the typical characteristics of voltage changes to the greatest extent.

[0090] As one embodiment of the present invention, using Formula 1:

[0091] ;

[0092] Calculate the first Characteristic index of any reference time unit of a basic time unit ;

[0093] in, For any reference time unit; This represents the number of extreme points in this reference time unit. ; This is the average input voltage value for this reference time unit; This is the average input voltage value of the previous reference time unit; For this reference time unit The input voltage value at each extreme point; The first weighting coefficient; This is the second weighting coefficient; This is the first preset constant; This is the second preset constant;

[0094] Formula 1 Explanation: Used to reflect the degree of fluctuation of the extreme point of the reference time unit. The larger the value, the greater the fluctuation of the extreme point of the reference time unit. In order to best represent the typical characteristics of voltage change, the first... For each basic time unit, more characteristic time points are needed as references for data analysis; therefore, the characteristic index of this reference time unit... The larger; Used to reflect the degree of deviation between the average input voltage value of the current reference time unit and the average input voltage value of the previous reference time unit; The larger the value, the greater the difference between the input voltage value of this reference time unit and the previous reference time unit. Therefore, to best represent the typical characteristics of voltage changes, the [missing information - likely a specific parameter or parameter] is used. For each basic time unit, more characteristic time points are needed as references for data analysis; therefore, the characteristic index of this reference time unit... The larger;

[0095] Through the above technical solution, this embodiment considers the degree of fluctuation of the extreme point of the reference time unit. When the fluctuation is large, the characteristic index is increased, which can capture the details of drastic voltage changes and more accurately grasp the typical characteristics of voltage changes. Furthermore, based on the degree of deviation of the average input voltage of adjacent reference time units, when the deviation is large, the characteristic index is increased, which can detect changes in the system operating status in a timely manner. This provides more reliable characteristic time points for voltage data analysis, helping to accurately assess the system status, detect faults in a timely manner, and optimize control.

[0096] It should be noted that the average input voltage value of the previous reference time unit and the reference time unit Input voltage value at each extreme point The method of obtaining it is based on existing technology and will not be described in detail here;

[0097] It should be noted that the first weighting coefficient Second weighting coefficient First preset constant Second preset constant These are preset values, set based on empirical fitting, and will not be detailed here.

[0098] As one embodiment of the present invention, in step S3, formula two is used:

[0099] ;

[0100] Calculate the first Number of features at each basic time unit's characteristic time point ;

[0101] in, The number of basic features is preset; For the first Characteristic indices of each basic time unit; Preset constants for the features; To Round up;

[0102] Formula 2 Explanation; The first The larger the characteristic index of the first basic time unit, the more it indicates that the first... The greater the fluctuation range of a basic time unit in a short period of time, the more features are required. To The value is rounded up.

[0103] Through the above technical solution, this embodiment can accurately adapt to the characteristics of different basic time units, avoiding the blindness and irrationality of feature quantity allocation. It can ensure sufficient analysis of large fluctuation units, make reasonable use of resources, improve data processing efficiency and accuracy, and provide reliable support for subsequent in-depth analysis;

[0104] It should be noted that the preset number of basic features and feature preset constants These are preset values, set based on empirical fitting, and will not be detailed here.

[0105] In one embodiment of the present invention, the voltage quality index includes a voltage deviation index and a voltage stability index;

[0106] As one embodiment of the present invention, formula three is used:

[0107] ;

[0108] The voltage deviation index ;

[0109] in, The number of working days is preset in the past. ; The first day of the previously preset workday The curve of input voltage versus time; For the first The start time of each basic time unit; The preset interval duration; Rated voltage;

[0110] Through the above technical solution, this embodiment achieves... Reflecting the The deviation of the average input voltage from the rated voltage for each basic time unit. The larger the value, the more likely it is to be the first. The greater the deviation between the average input voltage and the rated voltage of each basic time unit, the more intuitively the staff can understand the situation. The degree of voltage deviation in each basic time unit;

[0111] It should be noted that the rated voltage These are preset values, set based on empirical fitting, and will not be detailed here.

[0112] As one embodiment of the present invention, formula four is used:

[0113] ;

[0114] Calculate the first Voltage stability index of each basic time unit ;

[0115] in, The first day of the previously preset workday Heavenly The first basic time unit Input voltage values ​​at each characteristic time point;

[0116] Through the above technical solution, this embodiment achieves... Reflecting the The stability of the input voltage in each basic time unit The larger the value, the more likely it is to be the first. The fluctuation range of the first basic time unit is relatively large, and the stability is low. Voltage stability index of each basic time unit The larger; The smaller the value, the better. The fluctuation amplitude of the first basic time unit is small, and the stability is high. Voltage stability index of each basic time unit The smaller;

[0117] As one embodiment of the present invention, the first The process of determining the coating strategy for each basic time unit is as follows:

[0118] Voltage deviation index With voltage deviation threshold Compare;

[0119] Voltage stability index With voltage stability threshold Compare;

[0120] when , When, explain the first The input voltage of each basic time unit deviates little from the preset voltage, resulting in high stability. The substrate with low flatness is processed at the first preset coating speed.

[0121] when , When, explain the first The input voltage of each basic time unit deviates little from the preset voltage, and the stability is generally good. The high flatness substrate is processed at the first preset coating speed.

[0122] when , When, explain the first The input voltage of each basic time unit deviates significantly from the preset voltage, resulting in high stability. The high-flatness substrate is processed at the second preset coating speed.

[0123] when , When, explain the first The input voltage of each basic time unit deviates slightly from the preset voltage, resulting in poor stability, and the substrate processing is stopped.

[0124] when , When, explain the first The input voltage of each basic time unit deviates significantly from the preset voltage, resulting in low stability, and the substrate processing is stopped.

[0125] when When, explain the first If the input voltage of a basic time unit deviates too much from the preset voltage, the substrate processing is stopped; substrate processing is stopped.

[0126] Through the above technical solution, this embodiment accurately determines the input voltage situation of each basic time unit by comparing the voltage deviation index with the threshold and the voltage stability index with the threshold. Based on different combinations of deviation and stability, a targeted coating strategy is formulated, such as handling low-flatness substrates when the deviation is small and the stability is high, and handling high-flatness substrates when the deviation is large and the stability is high. This effectively adapts to different voltage conditions, rationally allocates coating resources, avoids coating quality degradation due to voltage issues, ensures a stable and efficient coating process, and improves the overall coating effect.

[0127] It should be noted that the voltage deviation threshold and voltage stability threshold These are preset values, set based on empirical fitting, and will not be detailed here.

[0128] It should be noted that the first preset coating speed and the second preset coating speed are preset values, and the first preset coating speed is greater than the second preset coating speed. The specific values ​​of the first preset coating speed and the second preset coating speed are set based on empirical fitting, and will not be described in detail here.

[0129] As one embodiment of the present invention, the preset value range of the current threshold is: ;

[0130] When the coating strategy is to process the low-flatness substrate at a first preset coating speed, the first... The current threshold of each basic time unit is Because the surface of a substrate with low flatness has undulations, unevenness, etc., the distance between the coating head and the substrate changes as the coating head moves across the substrate surface to coat it. This causes significant fluctuations in the outflow rate of the coating material within a short period of time (for example, in recessed areas of the substrate, the distance between the coating head and the substrate is closer, and the outflow rate may be relatively reduced; while in raised areas, the distance is greater, and the outflow rate may be relatively increased). Therefore, the load on the coating machine changes within a short period of time. Large changes in the outflow rate of the coating material mean that the power required by the coating machine and the coating material to be processed change significantly within a short period of time, which will cause changes in the load on the coating machine. According to the working principle of motors, a sudden increase in load will cause the motor to require greater torque to maintain operation, which will lead to an increase in instantaneous current. Therefore, using the maximum current threshold can avoid shutdown caused by increased instantaneous current, thereby ensuring the continuity and stability of the coating process.

[0131] When the coating strategy is to process high-flatness substrates at a first preset coating speed, the high-flatness substrate surface is relatively smooth, and there will be no significant change in the load of the coating machine in a short period of time; therefore, the first The current threshold for each basic time unit is set to ; The first adjustment parameter is 1.1. ;

[0132] When the coating strategy is to process high-flatness substrates at the second preset coating speed, the high-flatness substrate surface is relatively flat, so there will be no problem of large load changes in the coating machine in a short period of time, and the current input voltage is low. Therefore, the first... The current threshold for each basic time unit is set to ;

[0133] When the coating strategy is to stop processing the substrate, this ensures that the equipment will not experience more serious malfunctions due to current issues when the coating machine is shut down due to abnormal voltage. The current threshold of each basic time unit is ; This is the second adjustment parameter. ;

[0134] Through the above technical solution, this embodiment sets corresponding current thresholds for substrates with different flatness and different coating speeds and voltages, so that the technical solution can flexibly adapt to various coating scenarios and meet diverse production needs.

[0135] It should be noted that the preset range for the current threshold is [range]. Second adjustment parameter Second adjustment parameter The specific values ​​are preset values, set based on empirical fitting, and will not be detailed here.

[0136] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A circuit control system in a diffusion plate coating production process, characterized by, The circuit control system includes: The circuit information monitoring module is used to monitor the input voltage and input current of the coating machine drive motor; The substrate grading module is used to perform flatness testing on all substrates to be tested and to rate all substrates based on the test results. The segmentation module is used to divide 24 hours into several basic time units according to preset intervals; The analysis module is used to analyze the input voltage of each basic time unit within a preset working day in the past to obtain the voltage quality index of each basic time unit; and to determine the coating strategy based on the voltage quality index of each basic time unit. The current threshold setting module is used to determine the current threshold according to the coating strategy; The protection module is used to issue an early warning when the input current exceeds the current threshold. No. The process of obtaining the voltage quality index of each basic time unit is as follows: S1 : obtaining the input voltage curve over time of the past predetermined working days of the first basic time unit; S2: according to the first past preset working days, the input voltage curve of the first basic time unit is analyzed to obtain the characteristic index of the first basic time unit; S3: According to the... The characteristic indices of the first basic time unit are analyzed to obtain the first... The number of features at each characteristic time point in a basic time unit; S4: In the The input voltage of each basic time unit changes over time over the past preset working days. The number of characteristic time points are selected at equal intervals on the curve. S5: Analyze the input voltage values ​​corresponding to characteristic time points of past preset working days and the input voltage variation curves over time for past preset working days to obtain the first... Voltage quality index of each basic time unit; In step S2, the characteristic index of the first basic time unit is obtained in the following way: S21: By analyzing the past preset workdays, each day... The input voltage variation curve of each basic time unit is analyzed to obtain the number of extreme points on the curve, the time and input voltage value corresponding to the extreme points; S22: Mark the times corresponding to the daily extreme points of past preset workdays on the same time axis; S23: The first timeline on this timeline Each basic time unit is divided into several reference time units at equal time intervals; S24: Analyze the number of extreme points in each reference time unit and the corresponding input voltage value of each extreme point to obtain the characteristic index of the reference time unit; S25: The characteristic index corresponding to the maximum value in the characteristic index of the reference time unit is the [missing value]. Characteristic indices of each basic time unit.

2. The circuit control system in a diffusion plate coating production process according to claim 1, wherein Using Formula 1: ； Computing the characteristic index of any reference time unit of a basic time unit ; in, For any reference time unit; This represents the number of extreme points in this reference time unit. ; This is the average input voltage value for this reference time unit; This is the average input voltage value of the previous reference time unit; For this reference time unit The input voltage value at each extreme point; The first weighting coefficient; This is the second weighting coefficient; This is the first preset constant; This is the second preset constant.

3. The circuit control system in the diffusion plate coating production process according to claim 2, characterized in that, In step S3, according to formula two: ； Calculate the first Number of features at each basic time unit's characteristic time point ; in, The number of basic features is preset; For the first Characteristic indices of each basic time unit; Preset constants for the features; To Round up.

4. The circuit control system in a diffusion plate coating production process according to claim 3, wherein The voltage quality index includes the voltage deviation index and the voltage stability index; Through formula three: ； calculating the voltage deviation index ; in, The number of working days is preset in the past. ; The first day of the previously preset workday The curve of input voltage versus time; For the first The start time of each basic time unit; The preset interval duration; This is the rated voltage.

5. The circuit control system in the diffusion plate coating production process according to claim 4, characterized in that, Through formula four: ； Calculate the first Voltage quality index of each basic time unit ; in, The first day of the previously preset workday Heavenly The first basic time unit The input voltage value at each characteristic time point.

6. The circuit control system in a diffusion plate coating production process according to claim 5, wherein No. The process of determining the coating strategy for each basic time unit is as follows: comparing the voltage deviation index to a voltage deviation threshold value; comparing the voltage stability index to a voltage stability threshold ​ When , the low flatness substrate is processed at the first preset coating speed; When , the high flatness substrate is processed at the first preset coating speed; When , the high flatness substrate is processed at the second preset coating speed; when , Stop processing the substrate when the time comes; when , Stop processing the substrate when the time comes; When the substrate is stopped.

7. The circuit control system in a diffusion plate coating production process according to claim 6, wherein The preset value range of the current threshold is ; When the coating strategy is to treat the low flatness substrate at the first preset coating speed, the current threshold of the first basic time unit is ; and the current threshold of the second basic time unit is When the coating strategy is to process a high-flatness substrate at a first preset coating speed, the first... The current threshold of each basic time unit is ; The first adjustment parameter is 1.

1. ; When the coating strategy is to process the high-flatness substrate at the second preset coating speed, the first The current threshold of each basic time unit is ; When the coating strategy is to stop processing the substrate, the current threshold of the first elementary time unit is ; the second adjustment parameter, .

8. The circuit control system in a diffusion plate coating production process according to claim 7, wherein The substrate was rated as high flatness or low flatness.

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