A product real-time monitoring method and system for a film drawing machine

Abstract

The application discloses a product real-time monitoring method and system for a film drawing machine, belongs to the technical field of film drawing production, and comprises the following steps: analyzing a drawing ratio of a film to be drawn and a total drawing length; analyzing a smooth thickness value of the film drawn at the current moment; analyzing the smooth thickness value of the film drawn at the current moment and a target film thickness of the film to be drawn, and judging whether the equipment parameters of the monitored equipment need to be adjusted; when the equipment parameters of the monitored equipment need to be adjusted, an equipment parameter adjustment model is established, and the equipment parameters are adjusted; a completion time is predicted, and an operator is reminded; the application realizes real-time monitoring of the quality of the film in the production process, adjusts the equipment parameters according to the real-time monitoring data, guarantees the stability and consistency of the product quality, improves the product quality and the production efficiency, and reduces manual interference and manufacturing cost of the product in manufacturing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thin film stretching production, in particular to a product real-time monitoring method and system for a film stretching machine. BACKGROUND

[0002] In the process of thin film stretching production, the physical and optical properties of the film will indeed change significantly with the stretching of the film, including but not limited to thickness, transmittance, infrared barrier rate, toughness and haze, etc. The changes in these properties directly affect the final quality of the film, and thus affect the application effect and market competitiveness of the product.

[0003] The existing film stretching machine relies on the experience of the operator to make manual adjustments during production, and the sampling inspection of the finished film can only be carried out after the production of the product is completed, which cannot monitor the quality problems of the film in real time during the production process and make adjustments, resulting in unstable and inconsistent product quality, which not only affects the production efficiency of the product, but also increases the manufacturing cost of the product.

[0004] Therefore, there is an urgent need for a product real-time monitoring system for a film stretching machine to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a product real-time monitoring system for a film stretching machine to solve the problems raised in the background art.

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

[0007] A product real-time monitoring method for a film stretching machine, the method comprising the following steps:

[0008] S1, collecting initial film data of the film to be stretched and target film thickness in the equipment to be monitored, analyzing the stretching ratio of the film to be stretched, and predicting the total stretching length;

[0009] S2, setting the initial equipment parameters of the equipment to be monitored and running the equipment to be monitored, and monitoring the film thickness of the stretched film in real time during the running of the equipment to be monitored, and analyzing the smooth thickness value of the stretched film at the current time;

[0010] S3, analyzing the smooth thickness value of the stretched film at the current time and the target film thickness of the film to be stretched, and determining whether the equipment parameters of the equipment to be monitored need to be adjusted;

[0011] S4, if the equipment parameters of the equipment to be monitored need to be adjusted, an equipment parameter adjustment model is established, the adjustment amount of each equipment parameter is obtained, and the adjustment of the equipment parameters is carried out in combination with the initial equipment parameters of the equipment to be monitored;

[0012] S5, according to the current time has been stretched film length and the predicted total length of stretching, combined with the adjusted device parameters of the device to be monitored, predict the completion time and remind the operator.

[0013] According to the technical scheme, the specific process of step S1 is as follows:

[0014] S1-1, the initial film data includes initial film thickness and initial film length; the initial film thickness of the film to be stretched is denoted as A initial ; the initial film length of the film to be stretched is denoted as B initial ; the target film thickness of the film to be stretched is denoted as A target .

[0015] Because the change of the transmittance, infrared barrier rate, toughness and haze of the film, the most important influencing factor is the thickness of the film, therefore, only the data analysis of the thickness of the film is carried out, the thickness of the stretched film is ensured to be the target film thickness, and the quality of the final film is stable and consistent, the installation of various sensors is reduced, and the complexity of system data processing is reduced, and the processing efficiency of the system is improved;

[0016] The target film thickness is the final film thickness expected to be reached in the production process, and all device adjustments and controls are to approach or reach this target, so that the produced film meets the quality requirements;

[0017] S1-2, the initial film thickness A initial of the film to be stretched and the target film thickness A target are used to calculate the stretching ratio of the film to be stretched, and the calculation formula is C=A initial / A target ; wherein, C represents the stretching ratio of the film to be stretched;

[0018] S1-3, the initial film length B initial of the film to be stretched and the stretching ratio C are used to calculate the predicted total length of the film to be stretched, and the calculation formula is D=B initial ×C; wherein, D represents the predicted total length of the film to be stretched.

[0019] According to the technical scheme, the specific process of step S2 is as follows:

[0020] S2-1, set the initial device parameters of the device to be monitored, the initial device parameters include the initial stretching speed and the initial stretching temperature; the initial stretching speed of the device to be monitored is set as E initial ; the initial stretching temperature of the device to be monitored is set as F initial .

[0021] S2-2, according to the initial stretching speed E set initial and the initial stretching temperature F initial , running the device to be monitored; during the operation of the device to be monitored, the film thickness of the stretched film is monitored in real time; the current time is recorded as t time; the time interval of data collection during real-time monitoring is recorded as ΔT; the time point before t time and different by ΔT is recorded as the previous time of the current time, t-1 time;

[0022] By monitoring the film thickness of the stretched film in real time for subsequent analysis and control, real-time monitoring of data not only ensures that the system can immediately respond to any changes, but also avoids quality problems caused by delays by quickly adjusting the device parameters of the device to be monitored through real-time data;

[0023] The film thickness of the stretched film is obtained by real-time monitoring of the sensor, and the sensor usually collects data once per second during monitoring, so the time interval is one second;

[0024] S2-3, the film thickness of the stretched film at t time is recorded as G t ; the smooth thickness value of the stretched film at the current time is calculated, and the specific formula is: H t =α×G t +(1-α)×H t-1 ; wherein H t represents the smooth thickness value of the stretched film at t time; H t-1 represents the smooth thickness value of the stretched film at t-1 time, when t-1=0, then H t-1=0 =A target ; α represents a smoothing coefficient, which is a system preset parameter;

[0025] The smooth thickness value is used to eliminate short-term fluctuations and highlight long-term trends. By smoothing short-term fluctuations, a more stable trend analysis is provided, thereby helping the device to make more stable and accurate adjustments.

[0026] According to the above technical solution, the specific process of step S3 is as follows:

[0027] S3-1, according to the smooth thickness value H t of the stretched film at t time and the target film thickness A target of the film to be stretched, the error value of the film at the current time is calculated, and the specific formula is: e t =H t -A target ; e t represents the error value of the film at t time;

[0028] S3-2, if |e t|≤β, indicates that the device parameter of the device to be monitored does not need to be adjusted; wherein, β is a parameter preset by the system, and the device parameter includes the stretching speed and the stretching temperature;

[0029] |>β, indicates that the device parameter of the device to be monitored needs to be adjusted. t |>β, indicates that the device parameter of the device to be monitored needs to be adjusted.

[0030] According to the above technical solution, the specific process of the step S4 is as follows:

[0031] S4-1, when the device parameter of the device to be monitored needs to be adjusted, a device parameter adjustment model is established, and the specific process is as follows: ΔE t =γ1×e t +γ2×∫e t dt+γ3×(de t / dt); wherein, ΔE t represents the adjustment amount of the stretching speed at time t; γ1 represents a proportional coefficient; γ2 represents an integral coefficient; γ3 represents a differential coefficient; γ1, γ2 and γ3 of the device to be monitored are obtained by the Ziegler-Nichols method;

[0032] The Ziegler-Nichols method is to determine the parameters by exciting the oscillation response of the system.

[0033] S4-2, the time after the time t and the difference ΔT are taken as the next time of the current time, which is recorded as the time t+1; according to the adjustment amount ΔE t of the stretching speed at the time t, the initial stretching speed E initial of the device to be monitored and the initial stretching temperature F initial of the device to be monitored, the stretching speed and the stretching temperature of the device to be monitored are adjusted, and the adjustment formula is as follows: E t+1 =E initial +ΔE t and F t+1 =F initial +ε×ΔE t ; wherein, E t+1 represents the stretching speed of the device to be monitored at the time t+1 after adjustment; F t+1 represents the stretching temperature of the device to be monitored at the time t+1 after adjustment; ε is a parameter preset by the system.

[0034] According to the above technical solution, the specific process of the step S5 is as follows:

[0035] S5-1, the length of the stretched film at the time t is recorded as D1 t ; the length of the film remaining to be stretched at the current time is calculated by the length D1 t of the stretched film at the time t and the expected total stretching length D, and the specific formula is as follows: D2t =D-D1 t ; wherein, D2 t represents the length of the film remaining to be stretched at time t;

[0036] S5-2, by the length of the film remaining to be stretched at time t D2 t and the adjusted stretching speed E of the device to be monitored at time t+1 t+1 , predict the completion time, specifically: t predicted =t+D2 t / E t+1 ; wherein, t predicted represents the predicted completion time; and remind the operator about the device parameters of the adjusted device to be monitored and the predicted completion time;

[0037] Predict the completion time of the entire stretching process, and the system reminds the operator to prepare for the next operation in advance, helps the implementation of production scheduling and planning, and improves the efficiency of production.

[0038] A product real-time monitoring system for a film stretching machine, the system comprising an information acquisition module, an information processing module and an execution module;

[0039] The information acquisition module is used to acquire the information required by the system; the information processing module is used to store, analyze and transmit the information of each module; and the execution module is used to execute the information of the information processing module.

[0040] According to the above technical solution, the information acquisition module comprises a film information unit and a device information unit;

[0041] The film information unit is used to acquire the initial film data of the film to be stretched and the data information of the target film thickness, and to monitor the data information of the film thickness of the stretched film in real time;

[0042] The device information unit is used to acquire the initial device parameters of the device to be monitored, and the real-time data information of the device to be monitored during device operation.

[0043] According to the above technical solution, the information processing module comprises an information storage unit, an information analysis unit and an information transmission unit;

[0044] The information storage unit is used to store the information acquired by the information acquisition module; the information analysis unit is used to analyze the information acquired by the information acquisition module; and the information transmission unit is used for information transmission of each module in the system.

[0045] According to the above technical solution, the execution module comprises a suggestion display unit and a regulation unit;

[0046] The display unit is used for displaying the device parameters of the device to be monitored, the predicted completion time of the film being stretched, and the reminder information; and the regulation and control unit is used for adjusting and controlling the device parameters of the device to be monitored.

[0047] Compared with the prior art, the present application has the following beneficial effects:

[0048] The present application analyzes the initial film data of the film to be stretched and the target film thickness, in combination with the real-time monitored film thickness of the film being stretched, to obtain the smooth thickness value of the film being stretched at the current time, provides a stable trend analysis, so that the adjustment of the device parameters of the device to be monitored is more stable and accurate, and the stability and consistency of the final product quality are ensured; and the completion time of the entire stretching process is predicted, which helps the implementation of production scheduling and planning and improves the production efficiency; therefore, the present application realizes real-time monitoring of the quality of the film during the production process, and adjusts the device parameters according to the real-time monitoring data, so as to ensure the stability and consistency of the product quality, not only improves the product quality and production efficiency, but also reduces the manual interference and manufacturing cost of the product during manufacturing. BRIEF DESCRIPTION OF DRAWINGS

[0049] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, which together with the embodiments of the present application, serve to explain the present application, and do not constitute a limitation of the present application. In the drawings:

[0050] Figure 1 is a flowchart of a product real-time monitoring method for a film stretching machine of the present application;

[0051] Figure 2 is a structural schematic diagram of a product real-time monitoring system for a film stretching machine of the present application. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0053] Please refer to Figure 1 The present application provides the technical solutions:

[0054] A product real-time monitoring method for a film stretching machine, the method comprising the following steps:

[0055] S1, collecting initial film data and target film thickness of the film to be stretched in the device to be monitored, analyzing the stretching ratio of the film to be stretched, and predicting the total stretching length;

[0056] According to the above technical solution, the specific process of step S1 is as follows:

[0057] S1-1, the initial film data includes initial film thickness and initial film length; the initial film thickness of the film to be stretched is denoted as A initial ; the initial film length of the film to be stretched is denoted as B initial ; the target film thickness of the film to be stretched is denoted as A target ;

[0058] Due to the change of the performance of the film such as transmittance, infrared barrier rate, toughness and haze, the most important influencing factor is the thickness of the film, therefore, only the thickness of the film is analyzed, the thickness of the stretched film is ensured to be the target film thickness, and the quality of the final film is stable and consistent, the installation of various sensors is reduced, and the complexity of system data processing is reduced, and the processing efficiency of the system is improved;

[0059] The target film thickness is the final film thickness expected to be reached in the production process, and all equipment adjustment and control are for approaching or reaching this target, so that the produced film meets the quality requirements;

[0060] S1-2, the stretching ratio of the film to be stretched is calculated through the initial film thickness A initial of the film to be stretched and the target film thickness A target , and the calculation formula is C=A initial / A target ; wherein C represents the stretching ratio of the film to be stretched;

[0061] S1-3, the expected total stretching length of the film to be stretched is calculated through the initial film length B initial of the film to be stretched and the stretching ratio C, and the calculation formula is D=B initial ×C; wherein D represents the expected total stretching length of the film to be stretched;

[0062] For example:

[0063] It is known that the initial film thickness A initial of the film to be stretched is 150, the target film thickness A target of the film to be stretched is 50, and the initial film length B initial of the film to be stretched is 1000;

[0064] The stretching ratio of the film to be stretched is calculated, and the calculation formula is C=A initial / A target =150 / 50=3; the expected total stretching length of the film to be stretched is calculated, and the calculation formula is D=B initial×C=1000×3=3000.

[0065] S2, set the initial device parameters of the device to be monitored and run the device to be monitored, and monitor the film thickness of the stretched film in real time during the running of the device to be monitored, and analyze the smooth thickness value of the stretched film at the current time;

[0066] According to the above technical scheme, the specific process of step S2 is as follows:

[0067] S2-1, set the initial device parameters of the device to be monitored, the initial device parameters including the initial stretching speed and the initial stretching temperature; set the initial stretching speed of the device to be monitored as E initial ; set the initial stretching temperature of the device to be monitored as F initial ;

[0068] S2-2, according to the set initial stretching speed E initial and the initial stretching temperature F initial , run the device to be monitored; monitor the film thickness of the stretched film in real time during the running of the device to be monitored; the current time is recorded as t time; the time interval of data collection during real-time monitoring is recorded as ΔT; the time before t time and different by ΔT is recorded as the previous time of the current time, that is, t-1 time;

[0069] By monitoring the film thickness of the stretched film in real time, the subsequent steps can be analyzed and controlled, and the real-time monitoring of data not only ensures that the system can immediately respond to any changes, but also avoids quality problems caused by delay by quickly adjusting the device parameters of the device to be monitored through real-time data;

[0070] The film thickness of the stretched film is obtained by real-time monitoring of the sensor, and the sensor usually collects data once per second, so the time interval is one second;

[0071] S2-3, record the film thickness of the stretched film at t time as G t ; calculate the smooth thickness value of the stretched film at the current time, and the specific formula is: H t =α×G t +(1-α)×H t-1 ; wherein H t represents the smooth thickness value of the stretched film at t time; H t-1 represents the smooth thickness value of the stretched film at t-1 time, when t-1=0, then H t-1=0 =A target ; α represents the smoothing coefficient, which is a system preset parameter;

[0072] For example:

[0073] Given that the thickness G of the stretched film at time t is... t =52, the smooth thickness H of the stretched film at time t-1 t-1 =50, α=0.5; Calculate the smooth thickness value of the stretched film at the current moment, the specific formula is: H t =α×G t +(1-α)×H t-1 =0.5×52+(1-0.5)×50=51;

[0074] The smoothing thickness value is used to eliminate short-term fluctuations and highlight long-term trends. By smoothing short-term fluctuations, it provides a more stable trend analysis, thereby helping the equipment make more stable and accurate adjustments.

[0075] S3. Analyze the smooth thickness value of the stretched film at the current moment and the target film thickness of the film to be stretched to determine whether the equipment parameters of the monitored equipment need to be adjusted.

[0076] According to the above technical solution, the specific process of step S3 is as follows:

[0077] S3-1, Based on the smooth thickness H of the stretched film at time t. t The target film thickness A of the film to be stretched target The error value of the thin film at the current moment is calculated using the following formula: e t =H t -A target ;e t This represents the error value of the thin film at time t;

[0078] S3-2, If |e t If |≤β, it means that the equipment parameters of the device to be monitored do not need to be adjusted; where β is a system preset parameter, and the equipment parameters include tensile speed and tensile temperature;

[0079] If |e t If |>β, it means that the equipment parameters of the monitored device need to be adjusted;

[0080] For example:

[0081] Based on the smooth thickness H of the stretched film at time t t =51 and the target film thickness A of the film to be stretched target =50, calculate the error value of the thin film at the current moment, the specific formula is: e t =H t -A target =51-50=1;

[0082] |e t=1|>β=0.9, it indicates that the device parameter of the device to be monitored needs to be adjusted.

[0083] S4, if the device parameter of the device to be monitored needs to be adjusted, a device parameter adjustment model is established, an adjustment amount of each device parameter is obtained, and the adjustment of the device parameter is performed in combination with the initial device parameter of the device to be monitored.

[0084] According to the above technical scheme, the specific process of step S4 is as follows:

[0085] S4-1, when the device parameter of the device to be monitored needs to be adjusted, a device parameter adjustment model is established, and the specific process is as follows: ΔE t =γ1×e t +γ2×∫e t dt+γ3×(de t / dt); wherein, ΔE t represents the adjustment amount of the stretching speed at time t; γ1 represents a proportional coefficient; γ2 represents an integral coefficient; γ3 represents a differential coefficient; γ1, γ2 and γ3 of the device to be monitored are obtained by Ziegler-Nichols method;

[0086] The Ziegler-Nichols method is to determine the parameters by exciting the oscillation response of the system.

[0087] S4-2, the time after time t and with a difference of ΔT is taken as the next time of the current time, which is recorded as time t+1; according to the adjustment amount ΔE t of the stretching speed at time t, the initial stretching speed E initial of the device to be monitored and the initial stretching temperature F initial of the device to be monitored, the stretching speed and the stretching temperature of the device to be monitored are adjusted, and the adjustment formula is as follows: E t+1 =E initial +ΔE t and F t+1 =F initial +ε×ΔE t ; wherein, E t+1 represents the stretching speed of the device to be monitored at time t+1 after adjustment; F t+1 represents the stretching temperature of the device to be monitored at time t+1 after adjustment; ε is a parameter preset by the system.

[0088] For example:

[0089] It is known that the initial stretching speed E initial =5 of the device to be monitored, the initial stretching temperature F initial =80 of the device to be monitored, the error value e t =H t -A target= 51 - 50 = 1, the proportional coefficient γ1 = 0.5, the integral coefficient γ2 = 0.05, the differential coefficient γ3 = 0.01, and ε = 2; the device parameter adjustment model is established, and specifically as follows: ΔE t = γ1 × e t + γ2 × ∫e t dt + γ3 × (de t / dt) = 0.5 × 1 + 0.05 × 5 + 0.01 × 0.2 = 1.01; the stretching speed and the stretching temperature of the to-be-monitored device are adjusted, and the adjustment formula is as follows: E t+1 = E initial + ΔE t = 5 + 1.01 = 6.01, and F t+1 = F initial + ε × ΔE t = 80 + 2 × 1.01 = 82.02.

[0090] S5, according to the length of the stretched film at the current time and the expected total length of stretching, in combination with the device parameters of the to-be-monitored device after adjustment, the completion time is predicted and the operator is reminded;

[0091] According to the above technical scheme, the specific process of step S5 is as follows:

[0092] S5-1, the length of the stretched film at t time is denoted as D1 t ; the length of the film that has not been stretched at the current time is calculated through the length of the stretched film D1 t at t time and the expected total length of stretching D, and the specific formula is as follows: D2 t = D - D1 t ; wherein D2 t represents the length of the film that has not been stretched at t time;

[0093] S5-2, the completion time is predicted through the length of the film that has not been stretched D2 t at t time and the stretching speed E t+1 of the to-be-monitored device at t+1 time after adjustment, and specifically as follows: t predicted = t + D2 t / E t+1 ; wherein t predicted represents the predicted completion time; and the operator is reminded about the device parameters of the to-be-monitored device after adjustment and the predicted completion time;

[0094] For example:

[0095] It is known that the length of the stretched film at t = 10:00:00 time D1 t = 2000, the expected total length of stretching D = 3000, and the stretching speed E t+1= 6.01;

[0096] The length of the film remaining to be stretched at the current time is calculated, and the specific formula is: D2 = D - D1 t = D - D1 t = 1000; the predicted completion time is: t predicted = t + D2 t / E t+1 = 10:02:47;

[0097] The completion time of the entire stretching process is predicted, and the system reminds the operator to prepare for the next operation in advance, helping the implementation of production scheduling and planning, and improving the efficiency of production.

[0098] Please refer to Figure 2 A product real-time monitoring system for a film stretching machine, the system comprising an information acquisition module, an information processing module and an execution module;

[0099] The information acquisition module is used to acquire information required by the system; the information processing module is used to store, analyze and transmit information of each module; and the execution module is used to execute information of the information processing module.

[0100] According to the above technical solution, the information acquisition module comprises a film information unit and a device information unit;

[0101] The film information unit is used to acquire initial film data of the film to be stretched and data information of the target film thickness, and to monitor data information of the film thickness of the stretched film in real time;

[0102] The device information unit is used to acquire initial device parameters of the device to be monitored, and real-time data information of the device to be monitored during device operation.

[0103] According to the above technical solution, the information processing module comprises an information storage unit, an information analysis unit and an information transmission unit;

[0104] The information storage unit is used to store information acquired by the information acquisition module; the information analysis unit is used to analyze information acquired by the information acquisition module; and the information transmission unit is used to transmit information of each module in the system.

[0105] According to the above technical solution, the execution module comprises a suggestion display unit and a regulation and control unit;

[0106] The display unit is used to display device parameters of the device to be monitored, predicted completion time of the film being stretched and reminder information; and the regulation and control unit is used to adjust and control the device parameters of the device to be monitored.

[0107] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0108] Finally, it should be noted that the above-mentioned only constitutes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications, equivalent replacements, and improvements of the technical solutions described in the foregoing embodiments can be made. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall fall within the scope of the present application.

Claims

1. A method for real-time monitoring of a product by a film pulling machine, characterized by: The method comprises the following steps: S1, collecting initial film data and target film thickness of the film to be stretched in the device to be monitored, analyzing the stretching ratio of the film to be stretched, and predicting the total length of the stretching; S1-1, the initial film data includes an initial film thickness and an initial film length; the initial film thickness of the film to be stretched is denoted as A initial ; the initial film length of the film to be stretched is denoted as B initial ; the target film thickness of the film to be stretched is denoted as A target ; S1-2, calculating the initial film thickness A of the film to be stretched initial and the target film thickness A target , calculating the stretching ratio of the film to be stretched, the calculation formula being C=A initial / A target ; wherein C represents the stretching ratio of the film to be stretched S1-3, calculating the expected total length of the film to be stretched, D, from the initial film length B of the film to be stretched and the stretch ratio C, according to the formula D = B initial initial where D represents the expected total length of the film to be stretched.​ S2, setting the initial device parameters of the device to be monitored and running the device to be monitored, monitoring the film thickness of the stretched film in real time during the running of the device to be monitored, and analyzing the smooth thickness value of the stretched film at the current time; S2-1, set initial device parameters of the device to be monitored, the initial device parameters including an initial stretching speed and an initial stretching temperature; set the initial stretching speed of the device to be monitored as E initial ; set the initial stretching temperature of the device to be monitored as F initial ; S2-2, according to the initial stretching speed E initial and initial stretching temperature F initial , running the device to be monitored; during the running of the device to be monitored, real-time monitoring the film thickness of the stretched film; taking the current time as t time; taking the time interval of data collection during real-time monitoring as ΔT; taking the time point before t time and with a difference of ΔT as the previous time point of the current time, as t-1 time; S2-3, the film thickness of the stretched film at time t is recorded as G t ; the smooth thickness value of the stretched film at the current time is calculated, and the specific formula is H t = α × G t + (1-α) × H t-1 ; wherein H t represents the smooth thickness value of the stretched film at time t; H t-1 represents the smooth thickness value of the stretched film at time t-1, when t-1=0, then H t-1=0 =A target ; α represents a smoothing coefficient; S3, analyzing the smooth thickness value of the stretched film at the current time and the target film thickness of the film to be stretched, and determining whether the device parameters of the device to be monitored need to be adjusted; S4, when the device parameters of the device to be monitored need to be adjusted, establishing a device parameter adjustment model, obtaining the adjustment amount of each device parameter, and adjusting the device parameters in combination with the initial device parameters of the device to be monitored; S5, according to the length of the stretched film at the current time and the total length of the predicted stretching, in combination with the device parameters of the adjusted device to be monitored, predicting the completion time and reminding the operator.

2. A method for real-time monitoring of products in a film-stretch-blow machine according to claim 1, characterized in that: The specific process of step S3 is as follows: S3-1, the smooth thickness value H of the film that has been stretched at time t t target film thickness A of the film to be stretched target , the error value of the film at the current time, and the specific formula is: t =H t -A target ; e t represents the error value of the film at time t S3-2, if |e| < β t |e| < β, indicates that the device parameter of the device to be monitored does not need to be adjusted; wherein β is a parameter preset by the system, and the device parameter includes the stretching speed and the stretching temperature; If |e t | > β, it is indicated that the device parameter of the device to be monitored needs to be adjusted.

3. A method for real-time monitoring of products in a film-stretch-blow machine according to claim 2, characterized in that: The specific process of step S4 is as follows: S4-1, when the device parameter of the device to be monitored needs to be adjusted, a device parameter adjustment model is established, specifically as follows: ΔE t =γ1×e t +γ2×∫e t dt+γ3×(de t / dt); wherein ΔE t represents the adjustment amount of the stretching speed at time t; γ1 represents a proportional coefficient; γ2 represents an integral coefficient; γ3 represents a differential coefficient; γ1, γ2, and γ3 of the device to be monitored are obtained by the Ziegler-Nichols method; S4-2, the time after t time and the time difference ΔT is recorded as the next time of the current time, t+1 time; according to the adjustment amount ΔE of the stretching speed at t time t , the initial stretching speed E of the device to be monitored initial , and the initial stretching temperature F of the device to be monitored initial , the stretching speed and the stretching temperature of the device to be monitored are adjusted, and the adjustment formula is: E t+1 =E initial +ΔE t , and F t+1 =F initial +ε×ΔE t ; wherein, E t+1 represents the stretching speed of the device to be monitored after adjustment at t+1 time; F t+1 represents the stretching temperature of the device to be monitored after adjustment at t+1 time; ε is a system preset parameter.

4. A method for real-time monitoring of products in a film-pulling machine according to claim 3, characterized in that: The specific process of step S5 is as follows: S5-1, the length of the stretched film at time t is recorded as D1 t ; the length of the film remaining unstretched at the current time is calculated by the length of the stretched film at time t D1 t and the total length of the expected stretch D, specifically the formula is: D2 t =D-D1 t ; wherein D2 t represents the length of the film remaining unstretched at time t S5-2, the remaining film length D2 not stretched at time t t and the stretching speed E of the adjusted to-be-monitored device at time t+1 t+1 , the predicted completion time, specifically: t predicted =t+D2 t / E t+1 ; wherein t predicted represents the predicted completion time; and the operator is reminded of the device parameters of the adjusted to-be-monitored device and the predicted completion time.

5. A system for real-time monitoring of a product in a film-stretch-blow machine, such as the method for real-time monitoring of a product in a film-stretch-blow machine according to any one of claims 1 to 4, characterized in that: The system comprises an information acquisition module, an information processing module and an execution module; The information acquisition module is used to acquire information required by the system; the information processing module is used to store, analyze and transmit information of each module; and the execution module is used to execute information of the information processing module.

6. A product real-time monitoring system for a film pulling machine according to claim 5, characterized in that: The information acquisition module comprises a film information unit and a device information unit; The film information unit is used to acquire data information of initial film data and target film thickness of the film to be stretched, and real-time monitoring data information of the film thickness of the stretched film; The device information unit is used to acquire initial device parameters of the device to be monitored, and real-time data information of the device to be monitored during the running of the device.

7. A product real-time monitoring system for a film pulling machine according to claim 5, characterized in that: The information processing module comprises an information storage unit, an information analysis unit and an information transmission unit; The information storage unit is used to store information acquired by the information acquisition module; the information analysis unit is used to analyze information acquired by the information acquisition module; and the information transmission unit is used for information transmission of each module in the system.

8. The product real-time monitoring system for a film pulling machine according to claim 5, characterized in that: The execution module comprises a suggestion display unit and a regulation unit; The display unit is used to display device parameters of the device to be monitored, predicted completion time of the film being stretched and reminding information; and the regulation unit is used to adjust and control the device parameters of the device to be monitored.

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