PVA film production management system and method
By detecting the thickness and defects of the PVA film, controlling the transmission state of the heating belt, the problem of unbalanced mechanical strength and flexibility in the production of PVA film in the prior art is solved, and the production quality and application range are improved.
Patent Information
- Application Number
- CN202510309695.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2025-06-24
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing PVA film production technology ignores the balance between mechanical strength and flexibility, which leads to the film being prone to defects during the production process, increasing production difficulty and cost, and has high application limitations and low overall quality.
By conducting thickness detection of the PVA film before and after peeling and drying, the transmission state of the heating belt is controlled according to the thickness changes, and defect detection is performed on the prepared PVA film, and classified management is performed according to the defect level.
The production quality of PVA film is improved, the balance between the mechanical strength and flexibility of the film is ensured, production defects and costs are reduced, and the application scope is expanded.
Smart Images
Figure CN120192565A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of production management, and particularly relates to a PVA film production management system and method. Background Art
[0002] Polyvinyl alcohol (PVA) film is a synthetic polymer material prepared from PVA. PVA film has excellent water solubility, transparency, and biodegradability, and is widely used in various fields. However, PVA film also has the problem of low mechanical strength. When producing the existing PVA film, only the mechanical strength of the PVA film finished product is improved, while other physical properties of the PVA film are ignored. For example, when preparing the PVA film, the balance between the mechanical strength and flexibility of the PVA film is not considered, resulting in defects being easily generated during the production and preparation process of the PVA film, increasing the production difficulty and production cost of the PVA film. The PVA film also has great limitations in application, and the overall quality of the PVA film is relatively low. Summary of the Invention
[0003] The purpose of the present invention is to provide a PVA film production management system and method. The present invention controls the transmission state of the heating belt according to the thickness change of the PVA film before and after stripping and drying by detecting the thickness of the PVA film, and classifies and manages the prepared PVA film according to the defect level, thereby improving the production quality of the PVA film.
[0004] The purpose of the present invention is achieved by the following technical means: In the first aspect, the present invention provides a PVA film production management method, including the following steps: Coat the prepared PVA solution on the heating belt; Detect the thickness of the PVA film at the outlet of the heating belt to obtain the first film thickness; Perform stripping and drying on the PVA film; Detect the thickness of the dried PVA film to obtain the second film thickness; Control the transmission state of the heating belt according to the first film thickness and the second film thickness; Detect the defects of the dried PVA film to obtain the defect level; Classify the PVA film according to the defect level.
[0005] Preferably, the step of detecting the thickness of the PVA film at the outlet of the heating belt to obtain the first film thickness includes the following steps: Set a light source emitter at the top of the outlet of the heating belt and a light source receiver at the bottom of the outlet of the heating belt; Obtain the light intensity of the light source emitter, denoted as the first light intensity; Obtain the light intensity of the light source receiver, denoted as the second light intensity; Calculate the first film thickness according to the first light intensity and the second light intensity; The calculation formula of the first film thickness is expressed as follows: , where, is the first film thickness, is the second light intensity, is the first light intensity, is the absorption coefficient.
[0006] Preferably, controlling the transmission state of the heating belt according to the first film thickness and the second film thickness includes the following steps: Calculate the moisture content of the film according to the first film thickness and the second film thickness; Obtain the preset moisture content; Control the transmission state of the heating belt according to the moisture content of the film and the preset moisture content; The calculation formula of the moisture content of the film is expressed as follows: , where, is the moisture content of the film, is the first film thickness, is the second film thickness.
[0007] Preferably, controlling the transmission state of the heating belt according to the moisture content of the film and the preset moisture content includes the following steps: Calculate the water content error according to the moisture content of the film and the preset moisture content; Obtain the real-time transmission speed of the heating belt; Calculate the speed change amount according to the water content error, the preset moisture content and the real-time transmission speed of the heating belt; Control the transmission speed of the heating belt according to the speed change amount; The calculation formula of the speed change amount is expressed as follows: , where, is the speed change amount, is the water content error, is the real-time transmission speed of the heating belt, is the preset moisture content.
[0008] Preferably, controlling the transmission state of the heating belt according to the moisture content of the film and the preset moisture content includes the following steps: Calculating the moisture error according to the moisture content of the film and the preset moisture content; Obtaining the real-time heating temperature of the heating belt; Calculating the temperature change amount according to the moisture error, the preset moisture content and the real-time heating temperature of the heating belt; Controlling the heating temperature of the heating belt according to the temperature change amount; The calculation formula of the temperature change amount is expressed as follows: , where is the temperature change amount, is the moisture error, is the real-time transmission temperature of the heating belt, is the preset moisture content.
[0009] Preferably, defect detection of the dried PVA film to obtain the defect level includes the following steps: Identifying defects of the dried PVA film to obtain the defect positions; Calculating the defect area according to the defect positions; Classifying the defects according to the defect area to obtain the defect level.
[0010] In a second aspect, the present invention provides a PVA film production management system, which applies the above-mentioned PVA film production management method, and includes: a solution coating module, a first thickness detection module, a film drying module, a second thickness detection module, a transmission control module, a defect detection module and a film classification module; The solution coating module is used for coating the prepared PVA solution on the heating belt; The first thickness detection module is used for detecting the thickness of the PVA film at the outlet of the heating belt to obtain the first film thickness; The film drying module is used for peeling and drying the PVA film; The second thickness detection module is used for detecting the thickness of the dried PVA film to obtain the second film thickness; The transmission control module is used for controlling the transmission state of the heating belt according to the first film thickness and the second film thickness; The defect detection module is used for detecting defects of the dried PVA film to obtain the defect level; The film classification module is used for classifying the PVA film according to the defect level.
[0011] Preferably, controlling the transmission state of the heating belt according to the first film thickness and the second film thickness includes the following steps: Calculating the moisture content of the film according to the first film thickness and the second film thickness; Obtaining a preset moisture content; Controlling the transmission speed of the heating belt and / or the heating temperature of the heating belt according to the moisture content of the film and the preset moisture content.
[0012] In a third aspect, the present invention provides an electronic device, including a processor and a memory. The memory is used to store computer program code, and the computer program code includes computer instructions. When the processor executes the computer instructions, the electronic device executes the above-mentioned PVA film production management method.
[0013] In a fourth aspect, the present invention provides a computer-readable storage medium, in which a computer program is stored. The computer program includes program instructions. When the program instructions are executed by a processor of an electronic device, the processor is caused to execute the above-mentioned PVA film production management method.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: By detecting the thickness of the PVA film before and after stripping and drying, controlling the transmission state of the heating belt according to the thickness change between the two, detecting the defects of the prepared PVA film, and classifying and managing the prepared PVA film according to the defect level, the production quality of the PVA film is improved; By setting a light source emitter and a light source receiver at the outlet of the heating belt, calculating the first film thickness of the PVA film by obtaining the light intensity of the light source emitter and the light source receiver, a data basis is provided for subsequent control of the transmission state of the heating belt, and the production quality of the PVA film is improved; By obtaining the first film thickness and the second film thickness of the PVA film, calculating the water content error, calculating the speed change amount and the temperature change amount of the heating belt according to the water content error, and controlling the transmission speed and / or the heating temperature of the heating belt, the production quality of the PVA film is improved. Description of the Drawings
[0015] The drawings here are incorporated into the specification and constitute a part of this specification, indicating the embodiments that conform to the present invention, and are used together with the specification to explain the principles of the present invention.
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0017] Figure 1 It is a schematic flowchart of a PVA film production management method provided in this embodiment; Figure 2 It is a schematic flowchart of step S2 provided in this embodiment for detecting the thickness of the PVA film at the outlet of the heating belt to obtain the first film thickness; Figure 3 It is a schematic flowchart of step S5 provided in this embodiment for controlling the transmission state of the heating belt according to the first film thickness and the second film thickness; Figure 4 It is a schematic flowchart of step S53 provided in an embodiment for controlling the transmission state of the heating belt according to the film moisture content and the preset moisture content; Figure 5 It is a schematic flowchart of step S53 provided in another embodiment for controlling the transmission state of the heating belt according to the film moisture content and the preset moisture content; Figure 6 It is a schematic flowchart of step S6 provided in this embodiment for detecting defects of the dried PVA film to obtain the defect level; Figure 7 It is a schematic structural diagram of a PVA film production management system provided in this embodiment; Figure 8 It is a schematic structural diagram of an electronic device provided in this embodiment. Detailed implementation manners
[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0019] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0020] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0021] Embodiment 1 This embodiment provides a PVA film production management method, as Figure 1 shown, including the following steps: S1, Coating the prepared PVA solution on the heating belt; S2, Detecting the thickness of the PVA film at the outlet of the heating belt to obtain the first film thickness; S3, Stripping and drying the PVA film; S4, Detecting the thickness of the dried PVA film to obtain the second film thickness; S5, Controlling the transmission state of the heating belt according to the first film thickness and the second film thickness; S6, Detecting defects of the dried PVA film to obtain the defect level; S7, Classifying the PVA film according to the defect level.
[0022] It should be noted that the prepared PVA solution is coated on the heating belt. During the transmission of the PVA solution on the heating belt, the water is removed by heating. When it reaches the outlet of the heating belt, the PVA solution forms a solid film. The solid film attached to the outlet of the heating belt is peeled off to obtain a preliminary PVA film. During the peeling process of the PVA film, it is necessary to pay attention to whether the thickness of the PVA film is uniform, so as to make the surface of the PVA film flat. At the same time, the water content of the PVA film can also be measured by the thickness change before and after peeling. Films with too low water content or completely dry are difficult to peel off and are prone to breakage during peeling, resulting in defects such as cracks. While too high water content will lead to poor physical properties of the PVA film and low production quality of the film. Therefore, it is necessary to detect the thickness of the PVA film after the heating port and peeling and drying, and control the transmission state of the heating belt according to the detected thickness results to produce PVA films with fewer defects and high quality. For the already produced PVA films, defect detection is carried out on them, and the severity of the defects is classified. The PVA films with high defect grades are recycled for reproduction, while the PVA films with low defect grades are subjected to local repair treatment. The specific classification, categorization, and treatment methods can be adjusted according to the actual situation and are not limited here.
[0023] In this embodiment, by detecting the thickness of the PVA film before and after peeling and drying, controlling the transmission state of the heating belt according to the thickness change between the two, detecting the defects of the prepared PVA film, and classifying and managing the prepared PVA film according to the defect grades, the production quality of the PVA film is improved.
[0024] In some embodiments, in step S2, the thickness of the PVA film at the outlet of the heating belt is detected to obtain the first film thickness, as Figure 2 shown, including the following steps: S21, a light source emitter is set at the top of the outlet of the heating belt, and a light source receiver is set at the bottom of the outlet of the heating belt; S22, obtain the light intensity of the light source emitter, denoted as the first light intensity; S23, obtain the light intensity of the light source receiver, denoted as the second light intensity; S24, calculate the first film thickness according to the first light intensity and the second light intensity; The calculation formula of the first film thickness is expressed as follows: , where is the first film thickness, is the second light intensity, is the first light intensity, is the absorption coefficient.
[0025] It should be noted that the online thickness detection of the PVA film of the heating belt is carried out by setting a light source emitter at the top of the outlet of the heating belt and a light source receiver at the bottom of the outlet of the heating belt, and detecting the film thickness of the PVA film at the outlet of the heating belt, that is, when the PVA film heating is completed. The principle of thickness detection is that when the light emitted by the light source emitter penetrates the film, part of the energy is blocked and absorbed by the PVA film, and the remaining part of the energy passes through the PVA film and reaches the light source receiver. Therefore, by obtaining the illumination intensity of the light source emitter and the illumination intensity of the light source receiver, the thickness of the PVA film at the outlet of the heating belt can be calculated. The absorption coefficient is used to measure the absorption ability of the PVA film to light. The larger the absorption coefficient, the stronger the absorption ability of the PVA film. The absorption coefficient of this embodiment is obtained by averaging the absorption coefficients of PVA solids and water.
[0026] In this embodiment, by setting a light source emitter and a light source receiver at the outlet of the heating belt, and obtaining the illumination intensities of the light source emitter and the light source receiver, the first film thickness of the PVA film is calculated, which provides a data basis for controlling the transmission state of the heating belt subsequently and improves the production quality of the PVA film.
[0027] In some embodiments, in step S5, according to the first film thickness and the second film thickness, the transmission state of the heating belt is controlled, as Figure 3 shown, including the following steps: S51, calculate the film moisture content according to the first film thickness and the second film thickness; S52, obtain the preset moisture content; S53, control the transmission state of the heating belt according to the film moisture content and the preset moisture content; The calculation formula of the film moisture content is expressed as follows: , where is the film moisture content, is the first film thickness, is the second film thickness.
[0028] It should be noted that during the peeling process of the PVA film, the water content of the PVA film can also be measured by the thickness change before and after peeling. Films with too low water content or completely dry ones are difficult to peel, and are prone to breakage during peeling, resulting in crack defects; while too high water content will lead to poor physical properties of the PVA film and low production quality of the film. Therefore, it is necessary to detect the thickness of the heating port and the PVA film after peeling and drying, and control the transmission state of the heating belt according to the detected thickness results to produce PVA films with fewer defects and high quality. Specifically, by presetting an ideal film moisture content, that is, a preset moisture content, in some preferred embodiments, the preset moisture content is set to 20%. By calculating the film moisture content at the end of heating based on the first film thickness and the second film thickness, the transmission state of the heating belt is controlled according to the film moisture content and the preset moisture content.
[0029] In some embodiments, in step S53, the transmission state of the heating belt is controlled according to the film moisture content and the preset moisture content, as Figure 4 shown, including the following steps: S531, calculate the water content error according to the film moisture content and the preset moisture content; S532, obtain the real-time transmission speed of the heating belt; S533, calculate the speed change amount according to the water content error, the preset moisture content and the real-time transmission speed of the heating belt; S534, control the transmission speed of the heating belt according to the speed change amount; The calculation formula for the speed change amount is expressed as follows: , where, is the speed change amount, is the water content error, is the real-time transmission speed of the heating belt, is the preset moisture content.
[0030] It should be noted that the water content error is obtained by subtracting the preset moisture content from the film moisture content, the transmission speed of the heating belt is obtained in real time, and the amount of speed to be adjusted is calculated according to the water content error, the preset moisture content and the real-time transmission speed of the heating belt. Taking the preset moisture content of 20%, the film moisture content of 10%, and the real-time transmission speed of 5 m / min as an example, the calculated water content error is -10%, and the calculated speed change amount is -5 / 11 m / min. Therefore, the transmission speed of the heating belt is increased by 5 / 11 m / min to increase the moisture content of the PVA film.
[0031] In some embodiments, in step S53, the transmission state of the heating belt is controlled according to the film moisture content and the preset moisture content, as Figure 5As shown, it includes the following steps: S535. Calculate the water content error according to the water content of the film and the preset water content. S536. Obtain the real-time heating temperature of the heating belt. S537. Calculate the temperature change amount according to the water content error, the preset water content and the real-time heating temperature of the heating belt. S538. Control the heating temperature of the heating belt according to the temperature change amount. The calculation formula of the temperature change amount is shown as follows: , Wherein, is the temperature change amount, is the water content error, is the real-time transmission temperature of the heating belt, is the preset water content.
[0032] It should be noted that the water content error is obtained by taking the difference between the water content of the film and the preset water content, the heating temperature of the heating belt is obtained in real time, and the temperature amount to be adjusted is calculated according to the water content error, the preset water content and the real-time transmission temperature of the heating belt. Taking the preset water content of 20%, the water content of the film of 40%, and the real-time heating temperature of 60 °C as an example, the calculated water content error is 20%, and the calculated temperature change amount is -15 °C. Therefore, the heating temperature of the heating belt is increased by 15 °C to reduce the water content of the PVA film.
[0033] In some embodiments, controlling the transmission state of the heating belt does not mean that only the transmission speed of the heating belt or only the heating temperature of the heating belt needs to be controlled. It is necessary to adjust both the transmission speed of the heating belt and the heating temperature of the heating belt according to the actual situation. For example, when the transmission speed is slow, adjusting the heating temperature of the heating belt to adjust the water content of the PVA film will result in too low a heating temperature; when the heating temperature is high, adjusting the transmission speed of the heating belt to adjust the water content of the PVA film will result in too fast a transmission speed; both of these are not conducive to forming a high-quality PVA film, and it is necessary to control both the transmission speed and the heating temperature of the heating belt at the same time. Therefore, technical solutions such as co-adjusting by presetting the water content for the speed and temperature respectively or setting thresholds for the speed and temperature respectively are within the protection scope of this embodiment.
[0034] In this embodiment, by obtaining the first film thickness and the second film thickness of the PVA film, calculating the water content error, calculating the speed change amount and the temperature change amount of the heating belt according to the water content error, and controlling the transmission speed and / or the heating temperature of the heating belt, the production quality of the PVA film is improved.
[0035] In some embodiments, in step S6, the dried PVA film is subjected to defect detection to obtain a defect grade, such as Figure 6 shown, which includes the following steps: S61, identify defects on the dried PVA film to obtain the defect positions; S62, calculate the defect area according to the defect positions; S63, classify the defects according to the defect area to obtain the defect grade.
[0036] It should be noted that to identify defects on the PVA film and obtain the defect positions, existing technologies such as image recognition technology can be used to recognize the surface image of the PVA film, or a Resnet network can be constructed for deep learning of defect recognition. After obtaining the defect positions, a high-definition image in which the defect and the reference object are located in the same image is acquired; through grayscale preprocessing of the high-definition image, the contours of the defect and the reference object are extracted; the scale of the image is calculated according to the extracted contour of the reference object, thereby calculating the defect area.
[0037] In this embodiment, by identifying defects on the PVA film, extracting the defect positions and calculating the defect area, and classifying the defect grades of the PVA film according to the defect area, it is beneficial to the classification processing of the PVA film finished products and improves the rationality of the management of the PVA film finished products.
[0038] Embodiment Two This embodiment provides a PVA film production management system, which applies the above-mentioned PVA film production management method, such as Figure 7 shown, and includes: a solution coating module, a first thickness detection module, a film drying module, a second thickness detection module, a transmission control module, a defect detection module, and a film classification module; The solution coating module is used to coat the prepared PVA solution on the heating belt; The first thickness detection module is used to detect the thickness of the PVA film at the outlet of the heating belt to obtain the first film thickness; The film drying module is used to strip and dry the PVA film; The second thickness detection module is used to detect the thickness of the dried PVA film to obtain the second film thickness; The transmission control module is used to control the transmission state of the heating belt according to the first film thickness and the second film thickness; The defect detection module is used to detect defects on the dried PVA film to obtain the defect grade; The film classification module is used to classify the PVA film according to the defect grade.
[0039] In this embodiment, by detecting the thickness of the PVA film before and after peeling and drying, the transmission state of the heating belt is controlled according to the thickness change between the two, and the prepared PVA film is defect-detected, and the prepared PVA film is classified and managed according to the defect level, thereby improving the production quality of the PVA film.
[0040] In some embodiments, controlling the transmission state of the heating belt according to the first film thickness and the second film thickness includes the following steps: Calculating the moisture content of the film according to the first film thickness and the second film thickness; Obtaining a preset moisture content; Controlling the transmission speed of the heating belt and / or the heating temperature of the heating belt according to the moisture content of the film and the preset moisture content.
[0041] In this embodiment, by obtaining the first film thickness and the second film thickness of the PVA film, calculating the water content error, calculating the speed change amount and the temperature change amount of the heating belt according to the water content error, and controlling the transmission speed and / or the heating temperature of the heating belt, the production quality of the PVA film is improved.
[0042] It should be understood that the disclosed system can be implemented in other ways. For example, the system embodiments described above are merely illustrative. For example, the above module division is only a logical function division, and there may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, each functional module can be integrated in a processing module, or each module can exist physically alone, or two or more modules can be integrated in one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
[0043] Embodiment 3 This embodiment provides an electronic device 2, as Figure 8 shown, a processor 21 and a memory 22, the memory 22 is used to store computer program code, the computer program code includes computer instructions, and when the processor 21 executes the computer instructions, the electronic device executes the above-mentioned PVA film production management method.
[0044] The electronic device 2 includes a processor 21, a memory 22, an output device 23, and an input device 24. The processor 21, the memory 22, the output device 23, and the input device 24 are coupled through a connector, which includes various interfaces, transmission lines, buses, etc., and the embodiments of the present invention do not limit this. It should be understood that in various embodiments of the present invention, coupling means being interconnected in a specific manner, including being directly connected or indirectly connected through other devices. For example, they can be connected through various interfaces, transmission lines, buses, etc.
[0045] The processor 21 can be one or more graphics processing units (GPUs). When the processor 21 is a single GPU, the GPU can be a single-core GPU or a multi-core GPU. Optionally, the processor 21 can be a processor group composed of multiple GPUs, and multiple processors are coupled to each other through one or more buses. Optionally, the processor 21 can also be other types of processors, etc., and the embodiments of the present invention do not limit this.
[0046] The memory 22 can be used to store computer program instructions and various computer program codes including the program codes for implementing the solution of the present invention. Optionally, the memory 22 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM), and the memory 22 is used for relevant instructions and data.
[0047] The input device 24 is used to input data and / or signals, and the output device 23 is used to output data and / or signals. The output device 23 and the input device 24 can be independent devices or an integrated device.
[0048] This embodiment provides a computer-readable storage medium. A computer program is stored in the computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by the processor of the electronic device, the processor is caused to execute the above-mentioned PVA film production management method.
[0049] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.
Claims
1. A PVA film production management method, characterized in that: The following steps are involved: Apply the prepared PVA solution on the heating belt; Performing thickness detection on the PVA film at the outlet of the heating belt to obtain a first film thickness; Peeling and drying the PVA film; Performing thickness detection on the dried PVA film to obtain a second film thickness; controlling a transmission state of the heating belt according to the first film thickness and the second film thickness; Perform defect detection on the dried PVA film to obtain defect levels; According to the defect levels, the PVA films are classified.
2. A PVA film production management method according to claim 1, characterized in that: The method of measuring the thickness of the PVA film at the outlet of the heating belt to obtain the first film thickness comprises the following steps: A light source transmitter is arranged at the top of the heating belt outlet, and a light source receiver is arranged at the bottom of the heating belt outlet; Obtaining the light intensity of the light source emitter, recorded as a first light intensity; Obtaining the light intensity of the light source receiver, recorded as the second light intensity; Calculating the first film thickness according to the first light intensity and the second light intensity; The calculation formula of the first film thickness is expressed as follows: ， in, is the first film thickness, is the second light intensity, is the first light intensity, is the absorption coefficient.
3. A PVA film production management method according to claim 1, characterized in that: The controlling of the transmission state of the heating belt according to the first film thickness and the second film thickness comprises the following steps: Calculating the moisture content of the film according to the first film thickness and the second film thickness; Get the preset moisture content; Controlling the transmission state of the heating belt according to the moisture content of the film and the preset moisture content; The calculation formula of the moisture content of the film is expressed as follows: ， in, is the moisture content of the film, is the first film thickness, is the second film thickness.
4. A PVA film production management method according to claim 3, characterized in that: The controlling of the transmission state of the heating belt according to the moisture content of the film and the preset moisture content comprises the following steps: Calculating a moisture error according to the film moisture content and the preset moisture content; Get the real-time transmission speed of the heating belt; Calculating a speed change according to the moisture error, the preset moisture content and the real-time transmission speed of the heating belt; Controlling the transmission speed of the heating belt according to the speed variation; The calculation formula of the speed change is as follows: ， in, is the speed change, is the water content error, is the real-time transmission speed of the heating belt, The preset moisture content.
5. A PVA film production management method according to claim 3, characterized in that: The controlling of the transmission state of the heating belt according to the moisture content of the film and the preset moisture content comprises the following steps: Calculating a moisture error according to the film moisture content and the preset moisture content; Get the real-time heating temperature of the heating belt; Calculating a temperature change according to the moisture error, the preset moisture content and the real-time heating temperature of the heating belt; Controlling the heating temperature of the heating belt according to the temperature change; The calculation formula of the temperature change is as follows: ， in, is the temperature change, is the water content error, The real-time transmission temperature of the heating belt, The preset moisture content.
6. A PVA film production management method according to claim 1, characterized in that: The method of performing defect detection on the dried PVA film to obtain a defect grade comprises the following steps: Defect identification is performed on the dried PVA film to obtain the defect location; Calculating the defect area according to the defect position; The defects are graded according to the defect area to obtain the defect grade.
7. A PVA film production management system, using a PVA film production management method as claimed in any one of claims 1 to 6, characterized in that: include: A solution coating module, a first thickness detection module, a film drying module, a second thickness detection module, a transmission control module, a defect detection module and a film classification module; The solution coating module is used to coat the prepared PVA solution on the heating belt; The first thickness detection module is used to detect the thickness of the PVA film at the outlet of the heating belt to obtain a first film thickness; The film drying module is used to peel and dry the PVA film; The second thickness detection module is used to detect the thickness of the dried PVA film to obtain the second film thickness; The transmission control module is used to control the transmission state of the heating belt according to the first film thickness and the second film thickness; The defect detection module is used to perform defect detection on the dried PVA film to obtain a defect level; The film classification module is used to classify the PVA film according to the defect level.
8. A PVA film production management system according to claim 7, characterized in that: The controlling of the transmission state of the heating belt according to the first film thickness and the second film thickness comprises the following steps: Calculating the moisture content of the film according to the first film thickness and the second film thickness; Get the preset moisture content; The transmission speed of the heating belt and / or the heating temperature of the heating belt are controlled according to the moisture content of the film and the preset moisture content.
9. An electronic device, characterized in that: It includes a processor and a memory, the memory is used to store computer program code, the computer program code includes computer instructions, when the processor executes the computer instructions, the electronic device executes a PVA film production management method as described in any one of claims 1 to 6.
10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which includes program instructions. When the program instructions are executed by a processor of an electronic device, the processor executes a PVA film production management method as described in any one of claims 1 to 6.