Multi-group film winding tension cooperative control system

Abstract

The invention discloses a multi-group film winding tension cooperative control system, which belongs to the technical field of plastic film production control, and comprises a plurality of groups of parallel winding devices, each winding device is provided with a motor, a winding wheel group, a belt, a speed sensor, a laser range finder, a data acquisition module, a tension calculation module, a speed adjustment module and a control execution module, the tension calculation module is used for acquiring corrected winding tension characteristics according to the film winding tension information, and the speed adjustment module is used for adjusting the winding speed according to the tension information and the historical tension information and outputting the corrected winding speed; through comprehensive consideration of multiple factors, the tension calculation accuracy is improved, cooperative control over the tension of multiple sets of films is achieved, and the purposes of dynamically adjusting the winding speed and then improving the system stability are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic film production control, and particularly to a multi-group film winding tension collaborative control system. Background Art

[0002] In the field of film production and processing, multi-group film winding is a common and key process. Specifically, in the manufacturing processes of plastic films, electronic films, etc., it is necessary to wind multiple groups of films simultaneously to improve production efficiency and product quality. However, the tension control in the film winding process is a complex and important issue. Appropriate tension can ensure the flatness and tightness of the film winding, avoid problems such as wrinkles and film breakage, thereby improving the product qualification rate and quality stability.

[0003] During the production process of plastic films, as the winding time increases, the film material will creep, resulting in changes in tension. However, the existing system does not incorporate the accumulated time factor into the tension calculation model, making the calculated tension deviate from the actual situation.

[0004] During the production process, multi-group separately controlled film windings are carried out simultaneously. However, there are significant differences in the tensions of different groups of films, resulting in uneven winding quality. The existing methods only simply control each group of films independently and do not fully consider the mutual influence between groups.

[0005] In addition, in the existing system, usually only linear adjustment is performed based on the difference between the current tension and the set value, without fully considering the historical change situation and relative change ratio of the tension, which easily leads to excessive and insufficient speed adjustments, thereby affecting the stability of the winding process. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that there are deficiencies in the prior art, such as the lack of comprehensive consideration of multiple factors, insufficient collaborative control of multiple groups of films, and imperfect speed adjustment strategies. For this reason, we propose a multi-group film winding tension collaborative control system.

[0007] The technical solution mainly is: a multi-group film winding tension collaborative control system, including multiple groups of parallel winding devices. The winding devices are equipped with motors, winding wheel groups, belts, speed sensors, laser rangefinders, data acquisition modules, tension calculation modules, speed adjustment modules, control execution modules, storage and management modules; The data acquisition module is used to collect and provide in real time the real-time film winding tension information of multiple groups of films on the winding wheel group, including winding speed, coil diameter, and the time elapsed from the start of winding to the current moment. According to the setting that the data acquisition module can collect the film winding tension information of multiple groups simultaneously, unified control of multiple groups of films can be effectively achieved; The tension calculation module is configured to receive the film winding tension information collected and transmitted by the data collection module, and obtain the corrected winding tension characteristics according to the film winding tension information. The speed adjustment module is configured to receive the winding tension characteristics transmitted by the tension calculation module, and adjust the winding speed according to the winding tension characteristics and the winding tension comparison characteristics, so as to obtain the corrected winding speed. The control execution module is configured to receive the corrected winding speed output by the speed adjustment module, and change the rotation speeds of the motor and the winding wheel set according to the corrected winding speed. The belt drive is sleeved on the drive ends of the motor and the winding wheel set. The storage and management module is configured to store the film winding tension information, the winding tension characteristics, the winding tension comparison characteristics, and the corrected winding speed, and provide a speed-tension coefficient, a time-tension coefficient, a correlation correction coefficient, and a speed adjustment coefficient for the calculations of the tension calculation module and the speed adjustment module.

[0008] Preferably, the data collection module includes a time data collection unit and a data collection center unit. The input end of the data collection center unit is connected to the output ends of the speed sensor, the laser rangefinder, and the time data collection unit. After the data collection center unit collects and summarizes the winding speed, the coil diameter, and the time elapsed from the start of winding to the current moment transmitted by the speed sensor, the laser rangefinder, and the time data collection unit, the data collection center unit outputs the film winding tension information from its output end.

[0009] Preferably, the tension calculation module includes a single-group film initial tension unit and multiple groups of correlation tension correction units. The single-group film initial tension unit obtains the first influence component of the speed and coil diameter factors on the winding tension characteristics according to the winding speed, the coil diameter, and the speed-tension coefficient. Specifically, by dividing the winding speed by the coil diameter and multiplying by the speed-tension coefficient, the first influence component of the speed and coil diameter factors on the winding tension characteristics is obtained. According to the time elapsed from the start of winding to the current moment and the time-tension coefficient, the second influence component on the winding tension characteristics is obtained. Specifically, by multiplying the time elapsed from the start of winding to the current moment by the time-tension coefficient, the second influence component of the time accumulation factor on the winding tension characteristics is obtained. Finally, based on the first influence component and the second influence component, obtain the real-time tension information of a single group of films at the current moment, that is, add the first influence component and the second influence component to obtain the initially calculated real-time tension information of each group of films at the current moment; The multiple groups of associated tension correction units are used to receive the real-time tension information transmitted by the single group of film initial tension units, and after summarizing the real-time tension information of each single group of films, obtain the average tension characteristics of multiple groups of films. Among them, summarize the real-time tension information of each single group of films, obtain the sum of the real-time tension information, and then divide the sum by the number of multiple groups to obtain the average tension characteristics; Based on the average tension characteristics, the real-time tension information, and the associated correction coefficient, obtain the winding tension characteristics. Specifically, subtract the real-time tension information of a single group from the average tension characteristics, perform a square root operation, and finally multiply by the associated correction coefficient and add it to the real-time tension to obtain the winding tension characteristics.

[0010] Preferably, the speed adjustment module includes a tension comparison unit and a speed adjustment unit; The tension comparison unit is used to compare the winding tension characteristics with the winding tension comparison characteristics, and the winding tension comparison characteristics include initial tension information and historical tension information; The speed adjustment unit is used to adjust and output the corrected winding speed according to the comparison result between the winding tension characteristics and the winding tension comparison characteristics.

[0011] Preferably, the initial tension information is the initial setting of the system for the winding tension characteristics. The initial setting of the winding tension characteristics is specifically the winding tension characteristics that the system initially sets and expects to achieve when performing coordinated control of multiple groups of films; The historical tension information is the winding tension characteristics obtained through the tension calculation module after experiencing the initial setting and adjusting the winding speed. Introducing the comparison of the historical tension information fully considers the historical changes in tension.

[0012] Preferably, the speed-tension coefficient is used to adjust the influence degree of the changes in the winding speed and the coil diameter on the real-time tension, and its value range is 0.1 - 10; The time-tension coefficient is used to adjust the influence degree of the time elapsed from the start of winding to the current moment on the real-time tension information, and its value range is 0.01 - 1; The associated correction coefficient is used to correct the real-time tension information of multiple groups of films, and its value range is 0.1 - 5; The speed adjustment coefficient is used to adjust the sensitivity of the corrected winding speed according to the tension change factor obtained from the proportional change between the winding tension characteristic and the winding tension comparison characteristic, and its value range is 0.01 - 0.5.

[0013] Preferably, based on the proportional change between the winding tension characteristic and the winding tension comparison characteristic, the proportional change characteristic is obtained, and the correction of the tension change factor to the corrected winding speed is determined as follows: If the winding tension characteristic is greater than the winding tension comparison characteristic, it indicates that the current winding tension is higher than the system-expected winding tension. Therefore, the part of the proportional change characteristic greater than 1 is subtracted to obtain the tension change factor. The tension change factor is simultaneously multiplied by the speed adjustment coefficient and the winding speed to obtain the winding speed adjustment characteristic of the reduction term. The winding speed is subtracted by the winding speed adjustment characteristic to output the corrected winding speed; If the winding tension characteristic is less than the winding tension comparison characteristic, it indicates that the current winding tension is lower than the system-expected winding tension. Therefore, the part of the proportional change characteristic less than 1 is subtracted from the proportional change characteristic to obtain the tension change factor. The tension change factor is simultaneously multiplied by the speed adjustment coefficient and the winding speed to obtain the winding speed adjustment characteristic of the increase term. The winding speed is added to the winding speed adjustment characteristic to output the corrected winding speed; If the winding tension characteristic is equal to the winding tension comparison characteristic, the winding speed is directly output; Among them, when the winding tension comparison characteristic is initially compared, the initial tension information is used for comparison; When the winding tension comparison characteristic is compared for the second time and above, the historical tension information is used for comparison.

[0014] Preferably, the devices used by the time data acquisition unit include a system clock; The devices used by the data acquisition center unit include a data collector.

[0015] The technical effects and advantages of the present invention: In the present invention, based on the film winding information provided by the data acquisition module, the tension calculation module comprehensively considers the influence of three main factors, namely winding speed, coil diameter, and time, on the tension. Thus, the real-time tension information of a single group of films at the current moment can be obtained more accurately. And by calculating the average value of the preliminary real-time tension information of all groups of films and comparing it with the real-time tension information of a single group of films, the correction of the winding tension is further achieved. This method fully considers the mutual influence between multiple groups of films, can effectively balance the tension difference between multiple groups of films, and realizes the coordinated control of the winding tension of multiple groups of films.

[0016] The speed adjustment module adjusts the winding speed based on the comparison relationship between the winding tension characteristics and the winding tension comparison characteristics, and uses the tension change factors generated by different proportional changes to obtain the corrected winding speed, which in turn helps the control execution module determine and execute the speed adjustment amplitude, so that the winding speed can be more accurately adjusted dynamically according to the tension changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the front view of the single-group winding device; Figure 2 This is a flow chart of the method for the coordinated control system of multiple film winding tensions.

[0018] In the figure: 1-reeling device, 2-motor, 3-reeling wheel set, 4-belt, 5-speed sensor, 6-laser rangefinder. DETAILED DESCRIPTION

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments.

[0020] Reference Figures 1 to 2 As shown, the present invention provides a technical solution: a multi-group film winding tension coordinated control system, comprising a plurality of parallel winding devices 1, the winding devices 1 are equipped with a motor 2, a winding wheel 3, a belt 4, a speed sensor 5, a laser rangefinder 6, a data acquisition module, a tension calculation module, a speed adjustment module, a control execution module, and a storage and management module; A data acquisition module is used to collect and provide real-time film winding tension information of multiple groups of films on the winding wheel group 3, including winding speed, winding diameter, and time elapsed from the start of winding to the current moment; The tension calculation module is used to receive the film winding tension information collected and transmitted by the data acquisition module, and obtain the winding tension characteristics to be corrected according to the film winding tension information; The speed adjustment module is used to receive the winding tension characteristics transmitted by the tension calculation module, and adjust the winding speed according to the winding tension characteristics and the winding tension comparison characteristics to obtain the corrected winding speed; The control execution module is used to receive the corrected winding speed output by the speed adjustment module, and change the rotation speed of the motor 2 and the winding wheel group 3 according to the corrected winding speed. The belt 4 is connected to the transmission end of the motor 2 and the winding wheel group 3. The storage and management module is used to store film winding tension information, winding tension characteristics, winding tension comparison characteristics, and corrected winding speed, and provide speed-tension coefficient, time-tension coefficient, correlation correction coefficient, and speed adjustment coefficient for calculation of tension calculation module and speed adjustment module; In this embodiment, the tension calculation module collects film winding tension information including winding speed, winding diameter and the time elapsed from the start of winding to the current moment based on the data acquisition module, and obtains real-time tension information through calculation of a single group of film initial tension units, thereby providing basic tension data for the system to make the tension calculation more practical, and then uses multiple groups of related tension correction units in combination with multiple groups of film data to obtain corrected winding tension characteristics, realize the coordination of multiple groups of film tensions, and improve the overall winding quality. The speed adjustment module obtains the adjusted winding speed based on the comparison result of the tension comparison unit, and is executed by the control unit of the motor 2 of the control execution module, and the motor 2 uses the belt 4 connected to the winding wheel group 3 box to realize dynamic adjustment of the winding speed.

[0021] Reference Figure 1 and Figure 2 As shown, in this embodiment: the data acquisition module includes a speed data acquisition unit, a winding diameter data acquisition unit, a time data acquisition unit and a data acquisition center unit; The data acquisition module includes a time data acquisition unit and a data acquisition center unit; The input end of the data acquisition center unit is connected to the output end of the speed sensor 5, the laser rangefinder 6 and the time data acquisition unit. After the data acquisition center unit collects and summarizes the winding speed, winding diameter, and the time elapsed from the start of winding to the current moment transmitted by the speed sensor 5, the laser rangefinder 6 and the time data acquisition unit, the output end of the data acquisition center unit outputs the film winding tension information; The equipment used by the time data acquisition unit includes a system clock; The equipment used by the data acquisition center unit includes a data collector.

[0022] In this embodiment, the sensing end of the speed sensor 5 is photoelectrically induced with the film winding device 1, thereby detecting the real-time winding speed of the film on the winding wheel group 3, and the sensing end converts the detected speed information into an electrical signal, and transmits the digital speed signal processed by the electrical signal to the data collector; At the same time, the laser rangefinder 6 emits a laser beam to illuminate the film roll of the winding wheel group 3. The laser beam is reflected back after encountering the surface of the film. The laser rangefinder 6 measures the time difference between laser emission and reception and calculates the distance to the surface of the film roll using the speed of light. Since the center position of the film roll is relatively fixed, the current film roll diameter can be calculated by measuring the distance at different positions multiple times and combining the geometric relationship. The processing unit inside the laser rangefinder 6 encodes the calculated roll diameter data and transmits it to the system's data collector in the form of a digital signal.

[0023] It should be noted that the system clock is a high-precision timing device that starts timing from the beginning of film winding and records the time elapsed from the start of winding to the current moment.

[0024] Referring to Figure 2 As shown, in this embodiment: the tension calculation module includes a single-group film initial tension unit and multiple groups of associated tension correction units; The single-group film initial tension unit obtains the first influence component on the winding tension characteristics according to the winding speed, coil diameter, and speed-tension coefficient; According to the time elapsed from the start of winding to the current moment and the time-tension coefficient, it obtains the second influence component on the winding tension characteristics; According to the first influence component and the second influence component, it obtains the real-time tension information of a single group of films at the current moment. The specific calculation process is as follows: ; is the real-time tension preliminarily calculated for each group of films at the current moment, Q1 is the speed-tension coefficient, is the real-time winding speed of each group of films, is the real-time coil diameter of each group of films, Q2 is the time-tension coefficient, and △t is the time elapsed from the start of winding to the current moment for each group of films; In the calculation of the single-group film initial tension unit of this embodiment, it calculates the influence component on the film tension due to the factors of winding speed and coil diameter. The faster the real-time winding speed v i of each group of films, the longer the length of the film wound per unit time increases, and a greater pulling force is required to overcome the inertia and friction of the film, thereby increasing the tension. The larger the real-time coil diameter r i of each group of films, the smaller the bending degree of the film during winding, and the required tension will also change accordingly. Multiply the ratio of speed to coil diameter by the speed-tension coefficient Q1 to obtain the tension component caused by the changes in winding speed and coil diameter.

[0025] Then it calculates the influence component on the film tension due to the factor of winding time accumulation. As the winding time △t increases, the film will cause the tension to change. Multiply △t by the time-tension coefficient Q2 to obtain the tension component generated due to the time accumulation effect.

[0026] The multiple groups of associated tension correction units are used to receive the real-time tension information transmitted by the single-group film initial tension unit, and after summarizing the real-time tension information of each single group of films, they obtain the average tension characteristics of multiple groups of films; Obtain the winding tension characteristics based on the average tension characteristics, real-time tension information, and correlation correction coefficient. The specific calculation process is as follows: ; is the winding tension characteristic after correction for each group of films, Q3 is the correlation correction coefficient, and m is the total number of groups of film winding. is the sum of the real-time tensions of all groups of films; The speed-tension coefficient is used to adjust the influence degree of the changes in winding speed and coil diameter on the real-time tension information, and its value range is 0.1 - 10; The time-tension coefficient is used to adjust the influence degree of the time elapsed from the start of winding to the current moment on the real-time tension information, and its value range is 0.01 - 1; The correlation correction coefficient is used to correct the real-time tension information of multiple groups of films, and its value range is 0.1 - 5.

[0027] In the multiple groups of correlation tension correction units of this embodiment, serves as a reference value for comparison with to determine the difference between the tension of the i-th group of films and the overall level. calculates the difference from the average tension of multiple groups of films, reflecting the deviation degree of the tension of the i-th group of films relative to the whole. A positive difference indicates that the tension of the i-th group is lower than the average level, and a negative difference indicates that it is higher than the average level; is to take the square root of the above difference, mainly to perform a non-linear transformation on the difference, make the change of the correction amount smoother, and avoid system instability caused by excessive correction. Multiplying the square-rooted difference by the correlation correction coefficient Q3 can correct the tension of the i-th group of films according to the tension difference between multiple groups of films, and realize the coordinated control of the tensions of multiple groups of films.

[0028] Referring to Figure 2 as shown, in this implementation scheme: The speed adjustment module includes a tension comparison unit and a speed adjustment unit; The tension comparison unit is used to compare the winding tension characteristic with the winding tension comparison characteristic, and the winding tension comparison characteristic includes initial tension information and historical tension information; The initial tension information is the initial setting of the system for the winding tension characteristic; The historical tension information is the winding tension characteristic obtained through the tension calculation module after experiencing the initial setting and adjusting the winding speed; The speed adjustment unit is used to adjust and output the corrected winding speed according to the comparison result of the winding tension characteristic and the winding tension comparison characteristic; The speed adjustment coefficient is used to adjust the sensitivity of the corrected winding speed according to the tension change factor obtained from the ratio change of the winding tension characteristic and the winding tension comparison characteristic, and its value range is 0.01 - 0.5. Based on the ratio change of the winding tension characteristic and the winding tension comparison characteristic, the ratio change characteristic is obtained, and the correction of the tension change factor to the corrected winding speed is determined as follows: If the winding tension characteristic is greater than the winding tension comparison characteristic, subtract the part where the ratio change characteristic is greater than 1 to obtain the tension change factor. The tension change factor is multiplied by the speed adjustment coefficient and the winding speed at the same time to obtain the winding speed adjustment characteristic of the decreasing term. Subtract the winding speed adjustment characteristic from the winding speed to output the corrected winding speed; If the winding tension characteristic is less than the winding tension comparison characteristic, subtract the part less than 1 from the ratio change characteristic to obtain the tension change factor. The tension change factor is multiplied by the speed adjustment coefficient and the winding speed at the same time to obtain the winding speed adjustment characteristic of the increasing term. Add the winding speed and the winding speed adjustment characteristic to output the corrected winding speed; If the winding tension characteristic is equal to the winding tension comparison characteristic, directly output the winding speed; Among them, when initially comparing the winding tension comparison characteristic, the initial tension information is used for comparison; When comparing the winding tension comparison characteristic for the second time and above, the historical tension information is used for comparison. The specific calculation formula is as follows: ; is the corrected winding speed of the increasing term, is the corrected winding speed of the decreasing term, is the corrected winding speed of the winding speed of the holding term; Q4 is the speed adjustment coefficient; is the winding tension comparison characteristic.

[0029] In this embodiment, when , , where by dividing the current tension by the previous tension, that is , a relative multiple relationship is obtained, which intuitively reflects the degree of increase in tension. This ratio is the basis for subsequent calculation of the speed adjustment amount, and the growth ratio of the tension relative to the previous moment is obtained. Subtract 1 from the ratio to obtain the change ratio of the tension relative to the previous moment. Then multiply the change ratio of the tension by the speed adjustment coefficient Q4 and the current winding speed , a suitable speed adjustment amount can be obtained. Finally, subtract this adjustment amount from the current winding speed to obtain the final winding speed that the control execution module needs to execute, so as to achieve the purpose of reducing the winding speed to reduce the tension.

[0030] When time, , in which the reduction ratio of the tension relative to the previous moment can be obtained, and subtracting the ratio of the current tension to the tension at the previous moment from 1 to obtain the reduction ratio of the tension. Similarly, multiplying the change ratio of the tension by the speed adjustment coefficient Q4 and the current winding speed , a suitable speed adjustment amount can be obtained, and adding this adjustment amount to the current winding speed to obtain the final winding speed that the control execution module needs to execute, so as to achieve the purpose of increasing the winding speed to increase the tension.

[0031] And when time, it indicates that there is no change in the current tension compared with the previous tension, so there is no operability for adjustment, and the control execution module will continuously execute the current winding speed .

[0032] It should be noted that any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should also be within the protection scope of the present invention.

Claims

1. A multi-group film winding tension coordinated control system, characterized in that: The invention comprises a plurality of parallel winding devices (1), wherein the winding devices (1) are equipped with a motor (2), a winding wheel group (3), a belt (4), a speed sensor (5), a laser rangefinder (6), a data acquisition module, a tension calculation module, a speed adjustment module, a control execution module, and a storage and management module; The data acquisition module is used to collect and provide real-time film winding tension information of multiple groups of films on the winding wheel group (3), including winding speed, winding diameter, and time elapsed from the start of winding to the current moment; The tension calculation module is used to receive the film winding tension information collected and transmitted by the data acquisition module, and obtain the corrected winding tension characteristics according to the film winding tension information; The speed adjustment module is used to receive the winding tension characteristics transmitted by the tension calculation module, and adjust the winding speed according to the winding tension characteristics and the winding tension comparison characteristics to obtain a corrected winding speed; The control execution module is used to receive the corrected winding speed output by the speed adjustment module, and change the rotation speed of the motor (2) and the winding wheel group (3) according to the corrected winding speed, and the belt (4) is connected to the transmission ends of the motor (2) and the winding wheel group (3); The storage and management module is used to store the film winding tension information, the winding tension characteristics, the winding tension comparison characteristics, and the corrected winding speed, and provide speed-tension coefficient, time-tension coefficient, associated correction coefficient and speed adjustment coefficient for the calculation of the tension calculation module and the speed adjustment module.

2. A multi-group film winding tension coordinated control system according to claim 1, characterized in that: The data acquisition module includes a time data acquisition unit and a data acquisition center unit; The input end of the data acquisition center unit is connected to the output ends of the speed sensor (5), the laser rangefinder (6) and the time data acquisition unit. After the data acquisition center unit collects and summarizes the winding speed, winding diameter, and the time elapsed from the start of winding to the current moment transmitted by the speed sensor (5), the laser rangefinder (6) and the time data acquisition unit, the output end of the data acquisition center unit outputs the film winding tension information.

3. A coordinated control system for multiple film winding tensions according to claim 1, characterized in that: The tension calculation module includes a single set of film initial tension units and multiple sets of associated tension correction units; The single-group film initial tension unit obtains a first influencing component on the winding tension characteristic according to the winding speed, the winding diameter, and the speed-tension coefficient; According to the time elapsed from the start of winding to the current moment and the time-tension coefficient, a second influencing component on the winding tension characteristic is obtained; Acquire real-time tension information of a single group of films at a current moment according to the first influence component and the second influence component; The multiple groups of associated tension correction units are used to receive the real-time tension information transmitted by the single group of film initial tension units, and to obtain the average tension characteristics of multiple groups of films after summarizing the real-time tension information of each single group of films; The winding tension characteristic is obtained according to the average tension characteristic, the real-time tension information, and the associated correction coefficient.

4. A multi-group film winding tension coordinated control system according to claim 3, characterized in that: The speed adjustment module includes a tension comparison unit and a speed adjustment unit; The tension comparison unit is used to compare the winding tension feature with the winding tension comparison feature, and the winding tension comparison feature includes initial tension information and historical tension information; The speed adjustment unit is used to adjust and output the corrected winding speed according to a comparison result between the winding tension characteristic and the winding tension comparison characteristic.

5. A multi-group film winding tension coordinated control system according to claim 4, characterized in that: The initial tension information is the initial setting of the winding tension characteristic by the system; The historical tension information is the winding tension characteristics obtained by the tension calculation module after the initial setting and adjustment of the winding speed.

6. A coordinated control system for multiple film winding tensions according to claim 5, characterized in that: The speed-tension coefficient is used to adjust the influence of the changes in the winding speed and the winding diameter on the real-time tension information, and the value range is 0.1-10; The time-tension coefficient is used to adjust the influence of the time from the start of winding to the current moment on the real-time tension information, and the value range is 0.01-1; The correlation correction coefficient is used to correct the real-time tension information of multiple groups of films, and the value range is 0.1-5; The speed adjustment coefficient is used to adjust the sensitivity of the corrected winding speed according to the tension change factor obtained by the proportional change of the winding tension characteristic and the winding tension comparison characteristic, and the value range is 0.01-0.

5.

7. A coordinated control system for multiple film winding tensions according to claim 6, characterized in that: Based on the proportional change of the winding tension characteristic and the winding tension comparison characteristic, the proportional change characteristic is obtained, and the correction of the tension change factor to the corrected winding speed is determined, specifically as follows: If the winding tension characteristic is greater than the winding tension comparison characteristic, the portion of the proportional change characteristic greater than 1 is subtracted to obtain the tension change factor, the tension change factor is multiplied by the speed adjustment coefficient and the winding speed at the same time to obtain the winding speed adjustment characteristic of the reduced term, the winding speed is subtracted from the winding speed, and the corrected winding speed is output; If the winding tension characteristic is less than the winding tension comparison characteristic, the proportion change characteristic is subtracted by a part less than 1 to obtain the tension change factor, the tension change factor is multiplied by the speed adjustment coefficient and the winding speed at the same time to obtain the winding speed adjustment characteristic of the added item, the winding speed is added to the winding speed adjustment characteristic, and the corrected winding speed is output; If the winding tension characteristic is equal to the winding tension comparison characteristic, directly output the winding speed; Wherein, the winding tension comparison feature uses the initial tension information for comparison during the initial comparison; The winding tension comparison feature uses the historical tension information to perform comparisons when comparing twice or more.

8. The coordinated control system for multiple film winding tensions according to claim 2, characterized in that: The equipment used by the time data acquisition unit includes a system clock; The equipment used by the data acquisition center unit includes a data collector.

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