A temperature control system for organic electroluminescent film

Abstract

The invention discloses an organic electroluminescent film temperature control system, which relates to the field of optoelectronic technology and comprises the following steps: collecting environmental data on the surface of an organic electroluminescent film and preprocessing the data; transmitting the preprocessed data to a data analysis unit to extract the characteristics of the temperature control data on the surface of the film; constructing a temperature control model on the surface of the film, inputting the characteristics of the temperature control data on the surface of the film into the temperature control model on the surface of the film, and predicting the control amount for reaching a target temperature; generating a temperature control execution command for uniformizing the temperature of the surface of the film according to the predicted control amount; generating a temperature balance index by using the result of the execution command; and adjusting the control parameter of the control amount according to the index. The invention realizes dynamic adjustment of the control amount through the temperature control execution command, realizes precise control of the surface temperature of the film, finally achieves uniformity of the surface temperature of the film, and improves the stability and efficiency of the temperature control on the surface of the film.

Description

Technical Field

[0001] The invention relates to the field of optoelectronic technology, in particular to an organic electroluminescent film temperature control system. Background Art

[0002] With the development of organic electroluminescent film technology, the control of film surface temperature has become one of the key factors affecting its performance and life. There are already some temperature control systems on the market for temperature control of organic electroluminescent films, but these systems generally have certain limitations. Traditional temperature control systems usually use simple PID controllers, which are difficult to cope with the uneven temperature distribution on the film surface, especially when the environmental conditions change greatly, the control accuracy and response speed are often difficult to meet the requirements.

[0003] However, in the existing technology, although the research attempts to monitor the surface temperature of the film through an integrated sensor network and optimize the control strategy through an algorithm, there are still shortcomings. Most of the existing temperature control models are based on linear assumptions and cannot accurately describe the nonlinear relationship between the surface temperature of the film and the environmental parameters, resulting in limited control accuracy. The temperature control execution command generation module is relatively simple and cannot dynamically adjust the control parameters to adapt to changes in the surface temperature of the film, resulting in poor temperature uniformity. Summary of the invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides an organic electroluminescent film temperature control system to solve the problems of imprecise environmental data processing, low prediction accuracy of temperature control model and poor temperature uniformity in the existing organic electroluminescent film temperature control system.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] The embodiment of the present invention provides an organic electroluminescent film temperature control system, which includes: an environmental data collection module, which collects environmental data on the surface of the organic electroluminescent film and pre-processes the data;

[0008] The data transmission and feature extraction module extracts the characteristics of the film surface temperature control data based on the data transmitted to the data analysis unit after preprocessing;

[0009] The film surface temperature control model building module builds the film surface temperature control model, uses historical data to train the film surface temperature control model, inputs the film surface temperature control data features into the film surface temperature control model, and predicts the control amount to reach the target temperature. The expression is,

[0010] ;

[0011] in, is the predicted value of the control quantity, is the Lagrange multiplier, is the bias term, is the number of training samples, is a hyperparameter, is the feature vector, is the first sample, To identify each training sample;

[0012] The temperature control execution command generation module generates a temperature control execution command for uniformizing the film surface temperature according to the predicted control quantity;

[0013] The temperature balance index generation module generates the temperature balance index by using the execution command result;

[0014] The control parameter adjustment module adjusts the control parameters of the control quantity according to the temperature balance index.

[0015] As a preferred solution of the temperature control system of the organic electroluminescent film of the present invention, the environmental data of the surface of the organic electroluminescent film is collected and the data is preprocessed, including the following steps:

[0016] The temperature and humidity data of the surface of the organic electroluminescent film are collected, and the data are cleaned, denoised and normalized.

[0017] As a preferred solution of the temperature control system of the organic electroluminescent film of the present invention, wherein: based on the pre-treated

[0018] The data is transmitted to the data analysis unit to extract the characteristics of the film surface temperature control data, including the following steps:

[0019] The data analysis unit extracts the film surface temperature control data features from the preprocessed data, including the temperature change rate and the influence of the equipment operation status on the temperature.

[0020] As a preferred solution of the organic electroluminescent film temperature control system of the present invention, wherein:

[0021] The temperature control execution command for uniformizing the surface temperature of the film is generated, including the following steps:

[0022] The controlled quantity is divided into heating and cooling;

[0023] when When the heating command is generated, the heating power is automatically adjusted. The expression is:

[0024] ;

[0025] in, is the heating power, is the basic heating power, Adjust the step size for heating power, is the target temperature;

[0026] when When the cooling command is generated, the cooling power expression is automatically adjusted as follows:

[0027] ;

[0028] in, is the cooling power, is the basic cooling power, Adjust the step size for cooling power.

[0029] As a preferred solution of the temperature control system of the organic electroluminescent film of the present invention, the surface temperature of the film is used to control the temperature of the film.

[0030] The uniform temperature control execution command results in precise control of the film surface temperature, including the following steps:

[0031] The equipment control unit receives commands from the film surface temperature control system;

[0032] Sort the received commands by their type and timestamp to form an ordered list of executed commands, and execute the commands in chronological order;

[0033] The device control unit monitors the current time and sends the control amount when a predetermined time point is reached.

[0034] As a preferred solution of the temperature control system of the organic electroluminescent film of the present invention, the temperature balance index is generated according to the precise control of the surface temperature of the film, including the following steps:

[0035] The temperature balance index is introduced to determine whether the film surface temperature reaches the expected target. The expression is:

[0036] ;

[0037] in, Temperature balance indicator, The film surface The temperature of each monitoring point, is the number of temperature monitoring points on the film surface, The film surface The humidity of each monitoring point, The number of humidity monitoring points on the film surface, is the reference humidity;

[0038] As a preferred solution of the temperature control system of the organic electroluminescent film of the present invention, wherein: according to the temperature balance index

[0039] The control parameters of the control quantity are adjusted by the standard, including the following steps:

[0040] By monitoring the surface temperature of the film, setting a threshold value of the temperature balance index, and comparing it with the threshold value of the temperature balance index, the temperature balance index is evaluated;

[0041] When the temperature balance index is greater than the threshold of the temperature balance index, the control parameter is adjusted, and the adjustment expression is:

[0042] ;

[0043] in, is the adjusted power, is the initial power, is the power adjustment step size, is the threshold of the temperature balance indicator.

[0044] The beneficial effects of the present invention are as follows: by collecting environmental data and preprocessing the environmental data, refined management of environmental data is achieved; by data transmission and feature extraction, the learning ability and prediction accuracy of the model are enhanced, and the precise grasp of the temperature change law of the film surface is achieved, and the intelligence level of the temperature control system is improved; by building a film surface temperature control model module, the prediction accuracy is improved, so that the film surface temperature control system can better adapt to complex environmental changes, and accurate prediction of the film surface temperature is achieved, and the adaptability and flexibility of the system are enhanced; by executing temperature control commands and dynamically adjusting the control amount, accurate control of the film surface temperature is achieved, and finally the uniformity of the film surface temperature is achieved, and the stability and efficiency of the film surface temperature control are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0046] Figure 1 This is a flow chart of the temperature control system for the organic electroluminescent film in Example 1.

[0047] Figure 2 This is a flow chart for analyzing the heating or cooling of the organic electroluminescent film temperature control system in Example 1. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0050] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0051] Example 1, reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, provides an organic electroluminescent film temperature control system, comprising the following steps:

[0052] S1, collecting environmental data on the surface of the organic electroluminescent film and preprocessing the data, including the following steps:

[0053] Furthermore, the temperature data of the film surface is collected, including the temperature values ​​of each monitoring point on the film surface.

[0054] The humidity data on the film surface, including the humidity values ​​at each monitoring point on the film surface, are cleaned, denoised and normalized.

[0055] S2, based on the pre-processed data transmitted to the data analysis unit, extract the film surface temperature control data features, including

[0056] Next step,

[0057] Furthermore, the preprocessed data is transmitted to the data analysis unit through a data transmission protocol to ensure the real-time and accuracy of data transmission. The temperature change rate is extracted from the preprocessed data, the equipment operation status is analyzed, the impact on the film surface temperature, the timestamps of equipment startup and shutdown are recorded, the change in film surface temperature before and after the equipment is turned on is calculated, and the specific impact of the equipment operation status on the temperature is determined.

[0058] S3, constructing a film surface temperature control model, inputting the film surface temperature control data characteristics into the film surface temperature control model,

[0059] Obtaining the predicted value of the control quantity includes the following steps:

[0060] Construct a film surface temperature control model, use historical data to train the film surface temperature control model, input the film surface temperature control data features into the trained film surface temperature control model, and obtain the predicted value of the control amount, which is expressed as:

[0061] ;

[0062] in, is the predicted value of the control quantity, is the Lagrange multiplier, is the bias term, is the number of training samples, is a hyperparameter, is the feature vector, is the first sample, To identify each training sample;

[0063] Furthermore, by using ,The film surface temperature control model captures the nonlinear relationship between the film surface temperature and environmental parameters, and improves the prediction accuracy;

[0064] The Lagrange multiplier gives each training sample a different weight, ensuring a reasonable distinction in the importance of different samples and improving the generalization ability of the model;

[0065] The bias term is fine-tuned during the prediction process to ensure that the predicted value is closer to the actual value, thus improving the accuracy and stability of the film surface temperature control model;

[0066] Through the trained film surface temperature control model, the control amount of the film surface temperature can be accurately predicted, so that the temperature control system can more accurately adjust the heating or cooling power to achieve uniform film surface temperature;

[0067] The film surface temperature control model responds to the changes in the film surface temperature in real time and generates temperature control execution commands in a timely manner, thereby improving the response speed and control accuracy of the system.

[0068] S4, generating a temperature control execution command for uniformizing the surface temperature of the film according to the predicted control quantity, including the following steps:

[0069] The controlled quantity is divided into heating and cooling;

[0070] when When the heating command is generated, the heating power is automatically adjusted. The expression is:

[0071] ;

[0072] in, is the heating power, is the basic heating power, Adjust the step size for heating power, is the target temperature;

[0073] when When the cooling command is generated, the cooling power expression is automatically adjusted as follows:

[0074] ;

[0075] in, is the cooling power, is the basic cooling power, Adjust the step size for cooling power;

[0076] Furthermore, through the formula and , automatically adjusts the heating or cooling power according to the difference between the target temperature and the predicted temperature to ensure that the film surface temperature is close to the target temperature;

[0077] Through the quadratic and , ensuring that when the temperature approaches the target temperature, the power adjustment amplitude gradually decreases to prevent over-adjustment;

[0078] When the predicted temperature changes, the system can immediately generate corresponding heating or cooling commands and adjust the power, improving the real-time response capability of the system;

[0079] By automatically adjusting the heating or cooling power, the need for manual intervention is reduced and automatic control is achieved;

[0080] The setting of basic heating power and basic cooling power ensures the stability of the film surface temperature under basic conditions and reduces unnecessary energy consumption;

[0081] By adjusting the heating power step and the cooling power step, the system can adjust the power more finely, avoiding energy waste caused by excessive or insufficient power.

[0082] S5. Use the results of the film surface temperature homogenization temperature control execution command to accurately control the film surface temperature, including

[0083] The following steps,

[0084] The equipment control unit receives commands from the film surface temperature control system;

[0085] Sort the received commands by their type and timestamp to form an ordered list of executed commands, and execute the commands in chronological order;

[0086] The device control unit monitors the current time and sends the control amount when the predetermined time point is reached;

[0087] Furthermore, by sorting the commands according to their timestamps, an ordered list of executed commands is formed, which ensures that the device executes the commands in the correct order, avoiding confusion and errors;

[0088] Through real-time monitoring and precise execution, the system can more accurately control the film surface temperature and avoid temperature fluctuations caused by time errors;

[0089] The equipment control unit can send the control quantity at the right time, which improves the execution efficiency and ensures the efficient operation of the system;

[0090] By precisely adjusting the heating or cooling power and executing the command at the right time, the system can better achieve uniform temperature on the film surface;

[0091] By executing commands in order and monitoring time in real time, the system can operate more stably and reduce temperature fluctuations caused by time errors.

[0092] S6, based on the precise control of the film surface temperature, generating a temperature balance index, including the following steps,

[0093] The temperature balance index is introduced to determine whether the film surface temperature reaches the expected target. The expression is:

[0094] ;

[0095] in, Temperature balance indicator, The film surface The temperature of each monitoring point, is the number of temperature monitoring points on the film surface, The film surface The humidity of each monitoring point, The number of humidity monitoring points on the film surface, is the reference humidity;

[0096] Furthermore, by calculating the deviation of the film surface temperature and humidity and normalizing them, the temperature balance index comprehensively evaluates the uniformity of the film surface temperature and humidity to ensure that the overall temperature and humidity of the film surface reach the expected target;

[0097] Quantification of temperature deviation: By calculating the deviation between the temperature of each monitoring point on the film surface and the target temperature and performing square processing, the unevenness of the film surface temperature can be effectively quantified;

[0098] Humidity deviation quantification: By calculating the deviation between the humidity at each monitoring point on the film surface and the reference humidity and performing square processing, the unevenness of the humidity on the film surface can be effectively quantified;

[0099] Temperature deviation averaging: By averaging the temperature deviation of each monitoring point on the film surface, the influence of the deviation of a single monitoring point is eliminated, ensuring the objectivity and accuracy of the evaluation results;

[0100] Humidity deviation averaging: By averaging the humidity deviation of each monitoring point on the film surface, the influence of the deviation of a single monitoring point is eliminated, ensuring the objectivity and accuracy of the evaluation results;

[0101] By calculating the temperature balance index, it is possible to accurately evaluate whether the film surface temperature and humidity have reached the expected targets, thereby improving the evaluation accuracy of the film surface temperature control system.

[0102] S7, adjusting the control parameters of the control quantity according to the temperature balance index, including the following steps,

[0103] By monitoring the surface temperature of the film, setting a threshold value of the temperature balance index, and comparing it with the threshold value of the temperature balance index, the temperature balance index is evaluated;

[0104] When the temperature balance index is greater than the threshold of the temperature balance index, the control parameter is adjusted, and the adjustment expression is:

[0105] ;

[0106] in, is the adjusted power, is the initial power, is the power adjustment step size, is the threshold of the temperature balance indicator;

[0107] Furthermore, when When the cooling power is increased, When the heating power is increased;

[0108] The range of is [0, +∞), Close to 0 means that the temperature on the film surface is very close to the target temperature, and the humidity is also very close to the reference humidity, indicating that the temperature and humidity on the film surface have reached a uniform state;

[0109] The larger the value, the greater the deviation of the temperature and humidity on the film surface from the target temperature and reference humidity, indicating that the temperature and humidity on the film surface are not uniform;

[0110] = 0 indicates a uniform state of film surface temperature and humidity.

[0111] In summary, the present invention achieves refined management of environmental data through: environmental data collection and preprocessing of environmental data, enhances the learning ability and prediction accuracy of the model through data transmission and feature extraction, achieves accurate grasp of the temperature change law of the film surface, and improves the intelligence level of the temperature control system, and improves the prediction accuracy through the film surface temperature control model construction module, so that the film surface temperature control system can better adapt to complex environmental changes, and achieves accurate prediction of the film surface temperature, and enhances the adaptability and flexibility of the system, and through the temperature control execution command, dynamically adjusts the control amount, and achieves precise control of the film surface temperature, and finally achieves uniformity of the film surface temperature, and improves the stability and efficiency of the film surface temperature control.

[0112] Example 2, referring to Table 1, is the second example of the present invention. To further verify the technical solution of the present invention, experimental simulation data of an organic electroluminescent film temperature control system is provided.

[0113] Two sets of organic electroluminescent film temperature control systems were used: one set was the system of the present invention, and the other set was a traditional temperature control system;

[0114] The test environment was a constant temperature laboratory, with the ambient temperature maintained at 25°C and the relative humidity at 50%;

[0115] Ten temperature monitoring points and 10 humidity monitoring points were set on the film surface, numbered 1 to 10;

[0116] The environmental data collection module in the new system collects temperature and humidity data on the film surface once a minute, and cleans, denoises and normalizes the data;

[0117] The data transmission and feature extraction module in the new system transmits the pre-processed data to the data analysis unit and extracts the film surface temperature control data features, including the temperature change rate and the impact of the equipment operation status on the temperature;

[0118] The film surface temperature control model building module in the new system uses historical data to train the film surface temperature control model to obtain the predicted value of the control quantity. The model training adopts , and set the Lagrange multiplier and bias term;

[0119] The temperature control execution command generation module in the new system generates a temperature control execution command for uniformizing the film surface temperature according to the predicted control quantity. When the predicted value of the predicted control quantity is lower than the target temperature, a heating command is generated and the heating power is automatically adjusted. When the predicted value of the predicted control quantity is higher than the target temperature, a cooling command is generated and the cooling power is automatically adjusted.

[0120] The device control unit receives commands from the film surface temperature control system and sorts them according to the command type and timestamp to form an ordered execution command list, and executes the commands in chronological order. The device control unit monitors the current time and sends the control amount when the predetermined time point is reached;

[0121] The temperature balance index generation module in the new system calculates the film surface temperature balance index and compares it with the set threshold to evaluate whether the film surface temperature reaches the expected target;

[0122] When the temperature balance index is greater than the set threshold, the control parameter adjustment module in the new system adjusts the control parameter of the control quantity, and the adjustment expression is: ;

[0123] The details are shown in Table 1 below:

[0124] Table 1 Experimental record table

[0125]

[0126] Tabular data analysis

[0127] Average temperature deviation:

[0128] The average temperature deviation of the new system was 0.2°C, while the average temperature deviation of the conventional system was 0.8°C, which shows that the new system can more accurately control the temperature of the film surface to bring it closer to the target temperature, which is significantly better than the conventional system;

[0129] Through sophisticated data preprocessing and feature extraction, the new system can more accurately predict the temperature changes on the film surface and adjust the heating or cooling power in time, thereby achieving more precise temperature control;

[0130] Temperature change rate:

[0131] The temperature change rate of the new system is 0.03°C / min, while the temperature change rate of the traditional system is 0.08°C / min, which shows that the new system is more gentle in the temperature regulation process and avoids drastic temperature fluctuations;

[0132] By predicting and dynamically adjusting the heating or cooling power through nonlinear models, the new system can better control the rate of change of the film surface temperature and improve the stability of the film surface temperature control;

[0133] Average humidity deviation:

[0134] The average humidity deviation of the new system is 1.5%RH, while the average humidity deviation of the traditional system is 3.0%RH, which shows that the new system is also better than the traditional system in humidity control;

[0135] By extracting the characteristics of the film surface temperature control data and combining it with the humidity data for comprehensive analysis, the new system can more effectively adjust the humidity of the film surface to make it close to the reference humidity and improve the uniformity of the film surface temperature control;

[0136] Temperature balance index:

[0137] The temperature balance index of the new system is 0.02, while the temperature balance index of the traditional system is 0.08, which shows that the new system performs well in uniformizing the temperature of the film surface;

[0138] By introducing a temperature balance index and adjusting the control parameters of the control quantity according to the index, the new system can more effectively achieve uniform temperature on the film surface and ensure that the temperature of each monitoring point on the film surface is consistent.

[0139] 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be covered by the scope of the claims of the present invention.

Claims

1. An organic electroluminescent film temperature control system, characterized in that: include: An environmental data collection module collects environmental data on the surface of the organic electroluminescent film and pre-processes the data; The data transmission and feature extraction module transmits the pre-processed data to the data analysis unit and extracts the features of the film surface temperature control data; The film surface temperature control model building module builds the film surface temperature control model, uses historical data to train the film surface temperature control model, inputs the film surface temperature control data features into the film surface temperature control model, and predicts the control amount to reach the target temperature. The expression is, ； in, is the predicted value of the control quantity, is the Lagrange multiplier, is the bias term, is the number of training samples, is a hyperparameter, is the feature vector, is the first sample, To identify each training sample; The temperature control execution command generation module generates a temperature control execution command for uniformizing the film surface temperature according to the predicted control quantity; The temperature balance index generation module generates the temperature balance index by using the execution command result; A control parameter adjustment module adjusts the control parameters of the control quantity according to the temperature balance index; Based on the precise control of the film surface temperature, the temperature balance index is generated, including the following steps: The temperature balance index is introduced to determine whether the film surface temperature reaches the expected target. The expression is: ； in, Temperature balance indicator, The film surface The temperature of each monitoring point, is the number of temperature monitoring points on the film surface, The film surface The humidity of each monitoring point, The number of humidity monitoring points on the film surface, For reference humidity.

2. The organic electroluminescent film temperature control system according to claim 1, characterized in that: Collecting environmental data on the surface of an organic electroluminescent film and preprocessing the data includes the following steps: The temperature and humidity data of the surface of the organic electroluminescent film are collected, and the data are cleaned, denoised and normalized.

3. The organic electroluminescent film temperature control system according to claim 2, characterized in that: Based on the pre-processed data transmitted to the data analysis unit, the film surface temperature control data features are extracted, including the following steps: The data analysis unit extracts the film surface temperature control data features from the preprocessed data, including the temperature change rate and the influence of the equipment operation status on the temperature.

4. The organic electroluminescent film temperature control system according to claim 3, characterized in that: According to the predicted control quantity, a temperature control execution command for uniformizing the surface temperature of the film is generated, including the following steps: The controlled quantity is divided into heating and cooling; when When the heating command is generated, the heating power is automatically adjusted. The expression is: ； in, is the heating power, is the basic heating power, Adjust the step size for heating power, is the target temperature; when When the cooling command is generated, the cooling power expression is automatically adjusted as follows: ； in, is the cooling power, is the basic cooling power, Adjust the step size for cooling power.

5. The organic electroluminescent film temperature control system according to claim 4, characterized in that: Using thin film The surface temperature homogenization temperature control execution command results in precise control of the film surface temperature, including the following steps: The equipment control unit receives commands from the film surface temperature control system; Sort the received commands by their type and timestamp to form an ordered list of executed commands, and execute the commands in chronological order; The device control unit monitors the current time and sends the control amount when a predetermined time point is reached.

6. The organic electroluminescent film temperature control system according to claim 5, characterized in that: Adjusting the control parameters of the control quantity according to the temperature balance index includes the following steps: By monitoring the film surface temperature, a threshold value of the temperature balance index is set and compared with the threshold value of the temperature balance index; When the temperature balance index is greater than the threshold of the temperature balance index, the control parameter is adjusted, and the adjustment expression is: ； in, is the adjusted power, is the initial power, is the power adjustment step size, is the threshold of the temperature balance indicator.

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