A multi-layer composite machine tape length on-line detection calculation method

Abstract

A method for online detection and calculation of the length of the material strip in a multi-layer composite machine, which calculates the length of the material strip diameter D of the take-up and unwinding devices according to the material strip path diagram of the multi-layer composite machine. RN and the length L of the material roll RN Length L of the material belt path in the winding and unwinding guide section XRN The length L of the material belt path in the tension floating roller section TN and the path length L of each segment whose length value remains unchanged in the system storage. KN By adding the data together, we can obtain the current strip length L of each roll on the machine at any given time. RN The total length of each material conveyor path ΣL N The data, specifically the online material strip length data, is used to achieve digital control of the multi-layer composite machine.

Description

Technical Field

[0001] This invention relates to solvent-free laminating machines, and more particularly to an online detection and calculation method for the length of the material strip in a multilayer laminating machine. Background Technology

[0002] Multilayer laminating machines are widely used in the food and other packaging industries. Traditional laminating machines cannot calculate the roll diameter and material length, as well as the length of the material strip in the path, in real time. Therefore, they cannot perform various digital controls on the unwinding and winding devices, such as automatic and accurate removal of waste film and estimation of reasonable winding diameter. They also cannot optimize the minimum remaining material length for valuable strips or digitally record the joints in the winding roll. The root cause of this problem is the inability to calculate the material strip length online in real time. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an online detection and calculation method for the length of the material strip in a multi-layer composite machine, which can realize online detection of the material strip length.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: an online detection and calculation method for the length of a multi-layer laminating machine strip, wherein the multi-layer laminating machine includes several unwinding devices, winding devices, laminating devices, coating devices, and floating roller devices installed on the unwinding path, comprising the following steps:

[0005] (S1) At any point during normal operation of the multilayer composite machine, simultaneously detect the signals from the rotary encoders corresponding to the take-up and unwind drive motor shafts to obtain the time value Δten for each revolution of the take-up and unwind drive motor shafts, and extract the motor speed n of the take-up and unwind drive motors at the beginning and end of the Δten time interval. i1 and n i2 , will △ten, n i1 and n i2 Input the data into the system and calculate the diameter D of the winding and unwinding devices at the start of the detection. RN and the length L of the material roll RN ;

[0006] (S2) Read the values ​​of the angular displacement sensors corresponding to each tension floating roller shaft at the start of the △ten time period, and obtain the path material belt length sway deviation value △ for each tension floating roller segment by calculation or table lookup. LTN Then, the deviation value △ of the path length of the tension floating roller section is calculated. LTN The length L of the path strip of each tension floating roller section when it is in the middle position of the swing arm TN0 By adding them together, we obtain the length L of the path material strip for each tension floating roller segment at the start of the detection. TN ;

[0007] (S3) Through the coil diameter D RNThe path length L of each winding and unwinding guide section is calculated, and its length varies with the diameter of the roll. XRN The length data at the start of the detection;

[0008] (S4) The diameter D of the material roll in the take-up and unwinding device RN and the length L of the material roll RN The length L of the path material strip in the winding and unwinding guide section XRN The length L of the material belt along the path of the tension floating roller section. TN and the length L of each path segment with a constant length value KN Add them together to obtain the current strip length L of each roll in the laminating machine at any time. RN The total path length of each base material ΣL N .

[0009] As an improvement, the specific steps of step (S1) are as follows:

[0010] (S11) The number of pulses N per revolution of the rotary encoder corresponding to the drive motor shaft end of the winding and unwinding device. E The value is known.

[0011] (S12) During the detection start time period, the system reads the time Δte1, Δte2, Δte3, ..., ΔteM used to read the rated pulse count emitted by the rotary encoder of each take-up and unwind drive motor shaft. The system then extracts the speed values ​​n of each take-up and unwind drive motor at the beginning and end of its respective Δte1, Δte2, Δte3, ..., ΔteM time period. 11 n 12 n 21 n 22 n 31 n 32 ...n M1 n M2 ;

[0012] (S13) Calculate the diameter D of the roll at the detection time of the winding and unwinding devices. RN :

[0013] D R1 =(120-2n) 12 *△te1)*δ F1 / [120-(n 11 +n 12 )*△te1] (1)

[0014] D R2 =(120-2n) 22 *△te2)*δ F2 / [120-(n 21 +n 22 )*△te2] (2)

[0015] D R3 =(120-2n) 32 *△te3)*δ F3 / [120-(n 31 +n 32 )*△te3] (3)

[0016] ...

[0017] D RM =(120-2n) M2 *△teM)*(Σδ F +Σδ G ) / [120-(n M1 +n M2 )*△teM] (4)

[0018] Where: D R1 D R2 D R3 D RM The diameters of the first substrate unwinding roll, the second substrate unwinding roll, the third substrate unwinding roll, and the rewinding roll at the start of the inspection are respectively.

[0019] δ F1 δ F2 δ F3 ……Σδ F The total thicknesses of the first substrate, the second substrate, the third substrate, and the multilayer composite film are respectively.

[0020] δ 胶1 δ 胶2 ……Σδ G These are the thicknesses of the first adhesive layer, the second adhesive layer, and the total thickness of all adhesive layers;

[0021] n 11 n 12 The motor speed values ​​of the first unwinding motor extracted by the system at the beginning and end of the △te1 detection time period;

[0022] n 21 n 22 The system extracts the motor speed values ​​of the second unwinding motor at the beginning and end of the △te2 detection time period;

[0023] n 31 n 32 The motor speed values ​​of the third unwinding motor at the beginning and end of the △te3 detection time period are extracted by the system.

[0024] n M1 n M2The motor speed values ​​of the winding motor at the beginning and end of the △teM detection time period are extracted by the system.

[0025] (S14) Calculate the strip length L of the material roll in the take-up and unwinding devices. RN :

[0026] L R1 =π(D) R1 2 -d A 2 ) / 4δ F1 (5)

[0027] L R2 =π(D) R2 2 -d B 2 ) / 4δ F2 (6)

[0028] L R3 =π(D) R3 2 -d C 2 ) / 4δ F3 (7)

[0029] ...

[0030] L RM =π(D) RM 2 -d M 2 ) / 4(Σδ F +Σδ G (8)

[0031] Where: L R1 L R2 L R3 ...L RM These represent the lengths of the first base material strip, the second base material strip, the third base material strip, and the composite film strip corresponding to the roll diameter at the start of the detection; d A d B d C d M These refer to the core diameters of the first base material roll, the second base material roll, the third base material roll, and the composite film take-up roll, respectively.

[0032] As an improvement, the specific steps of step (S2) are as follows:

[0033] (S21) Install a floating roller swing arm and an angular displacement sensor to detect the rotation angle of the floating roller shaft on the tension floating roller shaft. The swing roller is installed on the floating roller swing arm. When the floating roller swing arm rotates, the output value of the angular displacement sensor changes linearly. During machine debugging, the range of the measured output value is set to correspond to the left and right extreme swing positions of the swing arm, and the midpoint of the output value is in the middle position of the swing arm.

[0034] (S22) Based on the reading range of the angular displacement sensor and the actual swing range of the swing arm, set several corresponding relationship groups consisting of two sets of values: angular displacement reading and swing arm rotation angle;

[0035] (S23) Calculate or use a mapping method to obtain the length L of the material strip along the path of the two fixed guide rollers before and after the floating roller at each set angle. TNX ;

[0036] The length of the material path when the floating roller is in the middle position of the swing is L, which is the length of the material path when the tension floating roller section is in the middle position of the swing arm. TN0 ;

[0037] The path length L of the floating roller segment at each of the remaining swing angles TNX With L TN0 The difference (L) TNX -L TN0 ) represents the path strip length sway deviation value Δ of the tension floating roller segment corresponding to the angular displacement reading data. LTN The corresponding relationship is listed in the path strip length deviation table of the tension floating roller section;

[0038] (S24) During detection, read the output value on the angular displacement sensor and look up the corresponding deviation value Δ of the path length of the tension floating roller section in the path length deviation table. LTN And the length L of the path strip of the tension floating roller section when it is in the middle position of the swing arm. TN0 The sum of the two values ​​is the length L of the path material of the tension floating roller section at the moment of detection. TN ;

[0039] L TN =L TN0 +△ LTN0 (9)

[0040] (S25) When the angular displacement sensor reading cannot be found in the table, it is calculated using linear interpolation.

[0041] As an improvement, the specific steps of step (S3) are as follows:

[0042] L XR1 =[a1 2 -0.25(D R1 -dG ) 2 ] 0.5 +π*d G *{90-θ1-arcsin[(D R1 -d G ) / 2*a1]} / 360(10)

[0043] L XR2 =[a2 2 -0.25(D R2 -d G ) 2 ] 0.5 +π*d G *{90-θ2-arcsin[(D R2 -d G ) / 2*a2]} / 360(11)

[0044] L XR3 =[a3 2 -0.25(D R3 -d G ) 2 ] 0.5 +π*d G *{90-θ3-arcsin[(D R3 -d G ) / 2*a3]} / 360(12)

[0045] ...

[0046] L XRM =[a M 2 -0.25(D RM -d G ) 2 ] 0.5 +π*d G *{90-θ M -arcsin[(D R1 -d G ) / 2*a M ]} / 360(13)

[0047] Where: L XR1 L XR2 L XR3 L XRM d represents the path length of the unwinding and winding guide sections of the first substrate unwinding device, the second substrate unwinding device, and the third substrate unwinding and winding device; G The diameter of the fixed guide rollers for unwinding and winding;

[0048] a1, a2, a3, a MThis is the center distance between the material roll and the corresponding fixed guide roller;

[0049] θ1, θ2, θ3, θ M It is the angle between the line connecting the center of the material roll and the center of the corresponding fixed guide roller and the horizontal line.

[0050] As an improvement, the specific steps of step (S4) are as follows:

[0051] The definitions and calculation formulas for the segmented and total lengths of each substrate path strip are as follows:

[0052] L R1 L R2 L R3 L RM The lengths of the strip contained in the roll at the time of detection are the unwinding of the first substrate, the unwinding of the second substrate, the unwinding of the third substrate, and the winding of the composite film, respectively, calculated according to formulas (5), (6), (7), and (8). In the formulas, D... R1 D R2 D R3 D RM Calculate according to formulas (1), (2), (3), and (4);

[0053] L XR1 L XR2 L XR3 L XRM The lengths of the guide strips for the first substrate unwinding, the second substrate unwinding, the third substrate unwinding, and the composite film winding at the detection time are calculated according to formulas (10), (11), (12), and (13).

[0054] L T11 L T21 L T31 The lengths of the material strips in the first tension floating roller section of the first substrate unwinding, second substrate unwinding, and third substrate unwinding paths are calculated according to formulas (14), (15), and (16).

[0055] L T12 L T22 The lengths of the material strip in the second tension floating roller section of the path for unwinding the first substrate and the second substrate are respectively calculated according to formulas (17) and (18);

[0056] L T11 =L T110 +△ LT11 (14)

[0057] L T21 =L T210 +△ LT21 (15)

[0058] L T31=L T310 +△ LT31 (16)

[0059] L T12 =L T120 +△ LT12 (17)

[0060] L T22 =L T220 +△ LT22 (18)

[0061] Among them, L T110 L T210 L T310 These are the lengths of the material strip along each tension floating roller segment when the swing arms of the first floating roller in the first unwinding path, the first floating roller in the second unwinding path, and the first floating roller in the third unwinding path are in the middle position.

[0062] L T120 L T220 These are the lengths of the material strip along each tension floating roller segment when the swing arm of the second floating roller in the first unwinding path and the second floating roller in the second unwinding path is in the middle position.

[0063] △ LT11 , △ LT21 , △ LT31 These are the path length deviations of the first floating roller in the first unwinding path, the first floating roller in the second unwinding path, and the tension floating roller section in the third unwinding path, respectively.

[0064] △ LT12 , △ LT22 These refer to the deviation of the material strip path length of the tension floating roller section of the second floating roller in the first unwinding path and the second floating roller in the second unwinding path.

[0065] L K11 L is the length of the fixed path strip between the first unwinding fixed guide roller and the first substrate path, and the first floating roller device. K12 L is the length of the fixed path material strip between the first floating roller device of the first substrate and the first coating unit. K13 The length of the fixed path strip between the second floating roller device of the first substrate and the composite unit is the length of the three strip segments. The length of these three strip segments remains unchanged and is measured by drawing.

[0066] L K21 L is the length of the fixed path strip between the second unwinding fixed guide roller of the second substrate and the first floating roller device of the second substrate path. K22 L is the length of the fixed path material strip between the first floating roller device and the second coating unit for the second substrate. K23 The length of the fixed path strip between the second floating roller device of the second substrate and the composite unit is the length of the three strip segments. The length of these three strip segments remains unchanged and is measured by drawing method.

[0067] L K31 L is the length of the fixed path strip between the third unwinding fixed guide roller of the third substrate and the first floating roller device of the third substrate path. K32 The length of the fixed path material strip between the first floating roller device of the third substrate and the composite unit is the length of the two sections of the material strip, which remains unchanged and is measured by drawing.

[0068] L KM This refers to the length of the material strip along the path from the composite unit to the winding guide roller of the composite film. This length of the material strip remains constant and is measured graphically.

[0069] L1, L2, L3 and L M The lengths of the material strips from the first substrate, the second substrate, and the third substrate from unwinding to the composite unit, and the length of the material strip from the composite film from winding to the composite unit, are calculated according to formulas (19), (20), (21), and (22), respectively.

[0070] L1 = L R1 +L XR1 +L K11 +L T11 +L K12 +L T12 +L K13 (19)

[0071] L2 = L R2 +L XR2 +L K21 +L T21 +L K22 +L T22 +L K23 (20)

[0072] L3 = L R3 +L XR3 +L K31 +L T31 +L K32 (twenty one)

[0073] L M =L RM +L XRM +L KM (twenty two).

[0074] As an improvement, the calculation steps for the roll diameter at the detection moment for the second type of winding and unwinding device are as follows:

[0075] D R1 = (50 / 3π)*V*△te1*I1+δ F1 (twenty three)

[0076] D R2 = (50 / 3π)*V*△te2*I2+δF2 (twenty four)

[0077] D R3 = (50 / 3π)*V*△te3*I3+δ F3 (25)

[0078] ...

[0079] D RM = (50 / 3π)*V*△tem*I m +Σδ F +Σδ G (26)

[0080] Σδ F =(δ F1 +δ F2 +……+δ FI )

[0081] Σδ G =(δ 胶1 +δ 胶2 +……+δ 胶(I-1) )

[0082] Among them, D R1 D R2 D R3 D RM The diameters of the first substrate unwinding roll, the second substrate unwinding roll, the third substrate unwinding roll, and the winding roll are respectively.

[0083] The strip length corresponding to the diameter of the material roll is:

[0084] L R1 =π[(50V*△te1*I1 / 3π+δ F1 ) 2 -d A 2 ] / 4δ F1 (27)

[0085] L R2 =π[(50V*△te2*I2 / 3π+δ F2 ) 2 -d B 2 ] / 4δ F2 (28)

[0086] L R3 =π[(50V*△te2*I3 / 3π+δ F3 ) 2 -d C 2 ] / 4δ F3 (29)

[0087] ...

[0088] L RM =π[(50 / 3π)*V*△tem*Im+Σδ F +Σδ G ) 2 -d M 2 ] / 4(Σδ F +Σδ G )

[0089] Among them, L R1 L R2 L R3 L RM These are the lengths of the first base material strip, the second base material strip, the third base material strip, and the composite film strip corresponding to the diameter of the tested roll.

[0090] δ F1 δ F2 δ F3 ……Σδ F The thicknesses of the first substrate, the second substrate, the third substrate, and the multilayer composite film are respectively.

[0091] δ 胶1 δ 胶2 ……Σδ G These are the thicknesses of the first adhesive layer, the second adhesive layer, and the total thickness of all adhesive layers;

[0092] d A d B d C d M These are the core diameters of the first base material roll, the second base material roll, the third base material roll, and the composite film take-up roll, respectively.

[0093] I1, I2, I3, and Im are the transmission ratios of each unwinding and rewinding drive shaft.

[0094] V represents the linear velocity of the composite steel roller set by the detection system at the specified time.

[0095] The beneficial effects of this invention compared to the prior art are:

[0096] According to the material path diagram of the multi-layer composite machine, the diameter D of the material roll of the take-up and unwinding device is... RN and the length L of the material roll RN Length L of the material belt path in the winding and unwinding guide section XRN The length L of the material belt path in the tension floating roller section TN and the path length L of each segment whose length value remains unchanged in the system storage. KN By adding the data together, we can obtain the current strip length L of each roll on the machine at any given time.RN The total length of each material conveyor path ΣL N The data, specifically the online material strip length data, is used to achieve digital control of the multi-layer composite machine. Attached Figure Description

[0097] Figure 1 This is a schematic diagram of a three-layer composite machine.

[0098] Figure 2 This is a schematic diagram of a floating roller device. Detailed Implementation

[0099] The present invention will now be further described with reference to the accompanying drawings.

[0100] A method for online detection and calculation of strip length in a multi-layer laminating machine is illustrated in this embodiment, using a three-layer laminating machine as an example. Figure 1 As shown, the laminating machine includes a first unwinding device, a second unwinding device, a third unwinding device, a winding device, a coating device, and a laminating device. The first unwinding device corresponds to unwinding a first base material roll 1, and includes a first unwinding shaft, a first unwinding drive motor, and a first rotary encoder disposed at the end of the first unwinding drive motor shaft. The second unwinding device corresponds to unwinding a second base material roll 2, and includes a second unwinding shaft, a second unwinding drive motor, and a second rotary encoder disposed at the end of the second unwinding drive motor shaft. The third unwinding device corresponds to unwinding a third base material roll 3, and includes a third unwinding shaft, a third unwinding drive motor, and a third rotary encoder disposed at the end of the third unwinding drive motor shaft. The winding device corresponds to the composite film roll 4 of the composite film, and includes a winding shaft, a winding drive motor, and a winding rotary encoder disposed at the end of the winding drive motor shaft. The coating device includes a first coating unit 9 for coating the first base material strip and a second coating unit 10 for coating the second base material strip. The composite device includes a composite unit 11 for composite of a first base material strip, a second base material strip, and a third base material strip. The composite unit 11 includes a composite steel roller and a composite rubber roller.

[0101] The first unwinding path, from front to back, includes a first base material roll 1, a first unwinding fixed roller 5, a first unwinding path first floating roller device 12, a first coating unit 9, a first unwinding path second floating roller device 13, and a composite unit 11. The first unwinding path also includes a front guide roller 20 and a rear guide roller 21 of the first unwinding path first floating roller device 12, and a rear guide roller 22 of the first unwinding path second floating roller device 13. The second unwinding path, from front to back, includes a second base material roll 2, a second unwinding fixed roller 6, a second unwinding path first floating roller device 14, a second coating unit 10, and a second unwinding path. The second unwinding path includes a second floating roller device 15 and a composite unit 11. The second unwinding path also includes a front guide roller 24 and a rear guide roller 23 of the first floating roller device 14, and a rear guide roller 25 of the second floating roller device 15. The third unwinding path, from front to back, includes a third base material roll 3, a third unwinding fixed roller 7, a first floating roller device 16, and a composite unit 11. The third unwinding path also includes a front guide roller 26 and a rear guide roller 27 of the first floating roller device 16. The winding path, from front to back, includes a composite unit 11, a winding fixed roller 8, and a composite film roll 4. For example... Figure 2 As shown, each floating roller device has the same structure, including a floating roller swing arm 29, a swing roller 28 installed at the lower end of the floating roller swing arm 29, a tension floating roller shaft 30 installed at the upper end of the floating roller swing arm 29, and a digital angular displacement sensor 31 for detecting the rotational position of the floating roller shaft.

[0102] The online detection and calculation method for material strip length includes the following steps:

[0103] (S1) At any point during normal operation of the multilayer composite machine, simultaneously detect the signals from the rotary encoders corresponding to the take-up and unwind drive motor shafts to obtain the time value Δten for each revolution of the take-up and unwind drive motor shafts. The system control PLC then extracts the motor speed n of the take-up and unwind drive shafts at the beginning and end of the Δten time period. i1 and n i2 , will △ten, n i1 and n i2 Input the corresponding formula built into the system to calculate the diameter D of the winding and unwinding devices at the start of the detection. RN and the length L of the material roll RN ;

[0104] (S2) Read the values ​​of the angular displacement sensors corresponding to each tension floating roller shaft at the start of the △ten time period, and refer to the "Path Material Length Swing Deviation Table of Tension Floating Roller Segment" built into the system to obtain the path material length swing deviation value △ corresponding to the output value of the angular displacement sensor for each tension floating roller segment. LTN Then, the deviation value △ of the path length of the tension floating roller section is calculated. LTNThe length L of the path strip of each tension floating roller segment stored in the system when the swing arm is in the middle position. TN0 By adding them together, we obtain the length L of the path material strip for each tension floating roller segment at the start of the detection. TN ;

[0105] (S3) Coil diameter D RN The path length L of the take-up and unwind guide sections stored in the data input system XRN The calculation formula yields the path strip length L of each winding and unwinding guide section, which varies with the diameter of the material roll. XRN The length data at the start of the detection;

[0106] (S4) According to the multi-layer composite machine material belt path diagram, the diameter D of the material roll of the take-up and unwinding device is... RN and the length L of the material roll RN The length L of the path material strip in the winding and unwinding guide section XRN The length L of the material belt along the path of the tension floating roller section. TN and the length L of each path segment with a constant length value KN Adding them together, we obtain the existing strip length L of each base material roll at any time in the laminating machine. RN The total length of each material conveyor path ΣL N data.

[0107] In step (S1), the diameter D of the material roll of the winding and unwinding devices at the detection time is calculated. RN and the length L of the material roll RN Specific methods:

[0108] (S11) The number of pulses N per revolution of the rotary encoder corresponding to the drive motor shaft end of the winding and unwinding device. E The value is known.

[0109] (S12) During the detection start time period, the system reads the time Δte1, Δte2, Δte3, ..., ΔteM used to read the rated pulse count emitted by the rotary encoder of each take-up and unwind drive motor shaft. The system then extracts the speed values ​​n of each take-up and unwind drive motor at the beginning and end of its respective Δte1, Δte2, Δte3, ..., ΔteM time period. 11 n 12 n 21 n 22 n 31 n 32 ...n M1 n M2 ;

[0110] (S13) Calculate the diameter D of the roll at the detection time of the winding and unwinding devices. RN :

[0111] D R1 =(120-2n) 12 *△te1)*δ F1 / [120-(n 11 +n 12 )*△te1] (1)

[0112] D R2 =(120-2n) 22 *△te2)*δ F2 / [120-(n 21 +n 22 )*△te2] (2)

[0113] D R3 =(120-2n) 32 *△te3)*δ F3 / [120-(n 31 +n 32 )*△te3] (3)

[0114] D RM =(120-2n) M2 *△teM)*(Σδ F +Σδ G ) / [120-(n M1 +n M2 )*△teM] (4)

[0115] Where: D R1 D R2 D R3 D RM The diameters of the first substrate unwinding roll, the second substrate unwinding roll, the third substrate unwinding roll, and the rewinding roll at the start of the inspection are respectively.

[0116] δ F1 δ F2 δ F3 , Σδ F The total thicknesses of the first substrate, the second substrate, the third substrate, and the multilayer composite film are respectively.

[0117] δ 胶1 δ 胶2 , Σδ G These represent the thicknesses of the first adhesive layer, the second adhesive layer, and the total thickness of all adhesive layers; n 11 n 12 The motor speed values ​​of the first unwinding motor extracted by the system at the beginning and end of the △te1 detection time period;

[0118] n 21 n 22The system extracts the motor speed values ​​of the second unwinding motor at the beginning and end of the △te2 detection time period;

[0119] n 31 n 32 The motor speed values ​​of the third unwinding motor at the beginning and end of the △te3 detection time period are extracted by the system.

[0120] n M1 n M2 The motor speed values ​​of the winding motor at the beginning and end of the △teM detection time period are extracted by the system.

[0121] (S14) Calculate the strip length L of the material roll in the take-up and unwinding devices. RN :

[0122] L R1 =π(D) R1 2 -d A 2 ) / 4δ F1 (5)

[0123] L R2 =π(D) R2 2 -d B 2 ) / 4δ F2 (6)

[0124] L R3 =π(D) R3 2 -d C 2 ) / 4δ F3 (7)

[0125] L RM =π(D) RM 2 -d M 2 ) / 4(Σδ F +Σδ G (8)

[0126] Where: L R1 L R2 L R3 L RM These represent the lengths of the first base material strip, the second base material strip, the third base material strip, and the composite film strip corresponding to the roll diameter at the start of the detection; d A d B d C d MThese refer to the core diameters of the first base material roll, the second base material roll, the third base material roll, and the composite film take-up roll, respectively.

[0127] In step (S2), the length L of the material strip along the path of the tension floating roller section is measured at the detection time. TN Specific methods:

[0128] (S21) Install a floating roller swing arm and an angular displacement sensor to detect the rotation angle of the floating roller shaft on the tension floating roller shaft. The swing roller is installed on the floating roller swing arm. When the floating roller swing arm rotates, the output value of the angular displacement sensor changes linearly. During machine debugging, the range of the measured output value is set to correspond to the left and right extreme swing positions of the swing arm, and the midpoint of the output value is in the middle position of the swing arm.

[0129] (S22) Based on the reading range of the angular displacement sensor and the actual swing range of the swing arm, set several corresponding relationship groups consisting of two sets of values: angular displacement reading and swing arm rotation angle;

[0130] (S23) Calculate or use a mapping method to obtain the length L of the material strip along the path of the two fixed guide rollers before and after the floating roller at each set angle. TNX ;

[0131] The length of the material path when the floating roller is in the middle position of the swing is L, which is the length of the material path when the tension floating roller section is in the middle position of the swing arm. TN0 ;

[0132] The path length L of the floating roller segment at each of the remaining swing angles TNX With L TN0 The difference (L) TNX -L TN0 ) represents the path strip length sway deviation value Δ of the tension floating roller segment corresponding to the angular displacement reading data. LTN The corresponding relationship is listed in the path strip length deviation table of the tension floating roller section;

[0133] (S24) During detection, read the output value on the angular displacement sensor and look up the corresponding deviation value Δ of the path length of the tension floating roller section in the path length deviation table. LTN And the length L of the path strip of the tension floating roller section when it is in the middle position of the swing arm. TN0 The sum of the two values ​​is the length L of the path material of the tension floating roller section at the moment of detection. TN ;

[0134] L TN =L TN0 +△ LTN0 (9)

[0135] (S25) When the angular displacement sensor reading cannot be found in the table, it is calculated using linear interpolation.

[0136] In step (S3), the length L of each path of the take-up and unwind guide section is... XRN Specific calculation method:

[0137] L XR1 =[a1 2 -0.25(D R1 -d G ) 2 ] 0.5 +π*d G *{90-θ1-arcsin[(D R1 -d G ) / 2*a1]} / 36 (10)

[0138] L XR2 =[a2 2 -0.25(D R2 -d G ) 2 ] 0.5 +π*d G *{90-θ2-arcsin[(D R2 -d G ) / 2*a2]} / 36 (11)

[0139] L XR3 =[a3 2 -0.25(D R3 -d G ) 2 ] 0.5 +π*d G *{90-θ3-arcsin[(D R3 -d G ) / 2*a3]} / 36 (12)

[0140] L XRM =[a M 2 -0.25(D RM -d G ) 2 ] 0.5 +π*d G *{90-θ M -arcsin[(D R1 -d G ) / 2*a M ]} / 36 (13)

[0141] Where: L XR1 L XR2 LXR3 L XRM d represents the path length of the unwinding and winding guide sections of the first substrate unwinding device, the second substrate unwinding device, and the third substrate unwinding and winding device; G The diameter of the fixed guide rollers for unwinding and winding;

[0142] a1, a2, a3, a M This is the center distance between the material roll and the corresponding fixed guide roller;

[0143] θ1, θ2, θ3, θ M It is the angle between the line connecting the center of the material roll and the center of the corresponding fixed guide roller and the horizontal line.

[0144] In step (S4), the calculation method for the path length of the multi-layer laminating machine and the length of the material roll is as follows:

[0145] L R1 L R2 L R3 L RM The lengths of the strip contained in the rolls at the time of detection for the first substrate unwinding 1, the second substrate unwinding 2, the third substrate unwinding 3, and the composite film rewinding 4 are calculated according to formulas (5), (6), (7), and (8), where D is the length of the strip. R1 D R2 D R3 D RM Calculate according to formulas (1), (2), (3), and (4);

[0146] L XR1 L XR2 L XR3 L XRM L represents the length of each strip path in the guide section during the unwinding of the first substrate, the unwinding of the second substrate, the unwinding of the third substrate, and the winding of the composite film at the detection time. XR1 The length of the material strip between the first base material roll 1 and the first unwinding fixed roller 5, L XR2 The length of the material strip between the second base material roll 2 and the second unwinding fixed roller 6, L XR3 The length of the material strip between the second base material roll 3 and the third unwinding fixed roller 7, L XRM The length of the composite film roll 4 to the winding fixed roller 8 is calculated according to formulas (10), (11), (12), and (13).

[0147] L T11 L represents the length of the material strip along the first section of the tension floating roller in the first substrate unwinding path, specifically the length of the material strip between the front guide roller 20 and the rear guide roller 21 of the first floating roller device 12 in the first unwinding path. T21L is the length of the material strip along the path of the first tension floating roller in the second unwinding path, that is, the length of the material strip between the front guide roller 24 and the rear guide roller 23 in the first floating roller device 14 of the second unwinding path; T31 The length of the material strip in the first section of the tension floating roller in the third substrate unwinding path is the length of the material strip between the front guide roller 26 and the rear guide roller 27 of the first floating roller device 16 in the third unwinding path.

[0148] L T11 =L T110 +△ LT11 (14)

[0149] L T21 =L T210 +△ LT21 (15)

[0150] L T31 =L T310 +△ LT31 (16)

[0151] Among them, L T110 L T210 L T310 These represent the lengths of the material strip along the paths containing tensioned floating rollers when the swing arms of the first floating rollers in the first unwinding path, the first floating rollers in the second unwinding path, and the first floating rollers in the third unwinding path are in the center position; △ LT11 , △ LT21 , △ LT31 The deviation of the path length of the tension floating roller segment of the first floating roller in the first unwinding path, the first floating roller in the second unwinding path, and the first floating roller in the third unwinding path at the detection time are respectively the deviation of the path length of the material strip.

[0152] L T12 L is the length of the strip in the second segment of the first substrate unwinding path that includes the tension floating roller, which is the strip length between the first coating unit 9 and the rear guide roller 22 of the second floating roller device 13 in the first unwinding path; T22 The length of the material strip in the second section of the second substrate unwinding path that includes the tension floating roller is the length of the material strip between the second coating unit 10 and the rear guide roller 25 of the second floating roller device 15 in the second unwinding path.

[0153] L T12 =L T120 +△ LT12 (17)

[0154] L T22 =L T220 +△ LT22 (18)

[0155] Among them, L T120 L T220These are the lengths of the material strip along the path containing the tensioned floating rollers when the swing arms of the second floating roller in the first unwinding path and the second floating roller in the second unwinding path are in the middle position, respectively.

[0156] △ LT12 , △ LT22 These are the deviations in the length of the material strip along the tension floating roller section of the second floating roller in the first unwinding path and the second floating roller in the second unwinding path, respectively.

[0157] L K11 L is the length of the fixed path strip between the first unwinding fixed guide roller 5 and the first substrate path first floating roller device 12, and the front guide roller 20. K12 The fixed path length L between the rear guide roller 21 of the first floating roller device for the first substrate and the first coating unit 9. K13 The length of the fixed path material strip between the rear guide roller 22 of the second floating roller device 13 for the first substrate and the composite unit 11 is constant and is measured by drawing method.

[0158] L K21 The length of the fixed path strip between the second unwinding fixed guide roller 6 of the second substrate and the front guide roller 24 of the first floating roller device 14 of the second substrate path, L K22 The length of the fixed path material strip between the rear guide roller 23 of the first floating roller device 14 and the second coating unit 10 for the second substrate, L K23 The length of the fixed path material strip between the rear guide roller 25 of the second floating roller device 15 for the second substrate and the composite unit 11 is constant and is measured by drawing method.

[0159] L K31 The length of the fixed path strip between the third unwinding fixed guide roller 7 and the front guide roller 26 of the first floating roller device 16 of the third substrate path, L K32 The length of the fixed path material strip between the rear guide roller 27 of the first floating roller device 16 of the third substrate and the composite unit 11 is constant and is measured by drawing.

[0160] L KM The length of the material strip along the path from the composite unit 11 to the winding fixed guide roller 8 is constant and is measured by drawing.

[0161] The length of the first substrate strip from the first unwound coil to the composite steel roll is:

[0162] L1 = L R1 +L XR1 +L K11 +L T11 +L K12 +L T12 +L K13 (19)

[0163] The length of the second substrate strip from the second unwound coil to the composite steel roll is:

[0164] L2 = L R2 +L XR2 +L K21 +L T21 +L K22 +L T22 +L K23 (20)

[0165] The length of the third substrate strip from the third unwound coil to the composite steel roll is:

[0166] L3 = L R3 +L XR3 +L K31 +L T31 +L K32 (twenty one)

[0167] The length of the composite film strip from the take-up material to the composite steel roller is:

[0168] L M =L RM +L XRM +L KM (twenty two).

[0169] The calculation steps for the roll diameter at the detection time for the second type of winding and unwinding device are as follows:

[0170] A subroutine is set up in the system to extract the linear speed value V of the composite steel roller. The average speed is obtained by extracting the linear speed value V of the composite steel roller at the detection time. The formula for calculating the diameter of the coil at the detection time of the winding and unwinding device of the composite machine is as follows:

[0171] D R1 = (50 / 3π)*V*△te1*I1+δ F1

[0172] D R2 = (50 / 3π)*V*△te2*I2+δ F2

[0173] D R3 = (50 / 3π)*V*△te3*I3+δ F3

[0174] D RM = (50 / 3π)*V*△tem*I m +Σδ F +Σδ G

[0175] Σδ F =(δ F1 +δ F2+……+δ FI )

[0176] Σδ G =(δ 胶1 +δ 胶2 +……+δ 胶(I-1) )

[0177] Among them, D R1 D R2 D RM The diameters of the first substrate unwinding roll, the second substrate unwinding roll, the third substrate unwinding roll, and the winding roll are respectively.

[0178] The strip length corresponding to the diameter of the material roll is:

[0179] L R1 =π[(50V*△te1*I1 / 3π+δ F1 ) 2 -d A 2 ] / 4δ F1

[0180] L R2 =π[(50V*△te2*I2 / 3π+δ F2 ) 2 -d B 2 ] / 4δ F2

[0181] L R3 =π[(50V*△te2*I3 / 3π+δ F3 ) 2 -d C 2 ] / 4δ F3

[0182] L RM =π[(50 / 3π)*V*△tem*Im+Σδ F +Σδ G ) 2 -d M 2 ] / 4(Σδ F +Σδ G )

[0183] Among them, L R1 L R2 L R3 L RM These are the lengths of the first base material strip, the second base material strip, the third base material strip, and the composite film strip corresponding to the diameter of the tested roll.

[0184] δ F1δ F2 δ F3 Σδ F The thicknesses of the first substrate, the second substrate, the third substrate, and the multilayer composite film are respectively.

[0185] δ 胶1 δ 胶2 ∑δ G These represent the thicknesses of the first adhesive layer, the second adhesive layer, and the total thickness of all adhesive layers; d A d B d C d M These are the core diameters of the first base material roll, the second base material roll, the third base material roll, and the composite film take-up roll, respectively.

[0186] I1, I2, I3, and Im are the transmission ratios of the unwinding and rewinding drive shafts.

[0187] The second method for calculating the roll diameter at the time of detection using the winding and unwinding device is suitable for situations where the machine operates smoothly or where the requirements for the calculation results are not strict.

[0188] Based on the path and material strip length obtained by automatic detection and calculation, this invention further calculates various length values ​​for automatic and accurate shutdown and rejection of waste material during film cutting, automatic determination of the shortest waste material cutting position during material roll replacement, and the winding diameter when the unwinding of the material roll is completed during startup, providing a foundation for the automatic control of the above functions.

[0189] Table of material belt path length deviation for tension floating roller section

[0190] Set the angle detection device reading 5 10 15 20 25 30 35 40 45 Floating roller swing arm swing angle (degrees) -4 -3 -2 -1 0 1 2 3 4 <![CDATA[Length deviation Δ of the strip in the first floating roller section LT11 > -28 -21 -14 -7 0 7 14 21 28 <![CDATA[L T110 ]]> 946.3 <![CDATA[Length deviation Δ of the strip in the second floating roller section LT12 > -13.6 -10.2 -7 -3.5 0 3.5 7 -10.6 -14.2 <![CDATA[L T120 ]]> 1133.4 <![CDATA[Length deviation Δ of the strip in the third floating roller section LT21 > -28 -21 -14 -7 0 7 14 21 28 <![CDATA[L T210 ]]> 723.8 <![CDATA[Length deviation Δ of the strip in the fourth floating roller section LT22 > -13.6 -10.2 -7 -3.5 0 3.5 7 -10.6 -14.2 <![CDATA[L T220 ]]> 1133.4 <![CDATA[Length deviation A of the strip in the fifth floating roller section LT31 > -28 -21 -14 -7 0 7 14 21 28 <![CDATA[L T310 ]]> 946.3

Claims

1. A method for online detection and calculation of the length of a multi-layer laminating machine strip, wherein the multi-layer laminating machine includes several unwinding devices, winding devices, laminating devices, coating devices, and a floating roller device installed on the unwinding path, characterized in that: Includes the following steps: (S1) At any point during normal operation of the multilayer composite machine, simultaneously detect the signals from the rotary encoders corresponding to the take-up and unwind drive motor shafts to obtain the time value Δten for each revolution of the take-up and unwind drive motor shafts, and extract the motor speed n of the take-up and unwind drive motors at the beginning and end of the Δten time interval. i1 and n i2 , will △ten, n i1 and n i2 Input the data into the system and calculate the diameter D of the winding and unwinding devices at the start of the detection. RN and the length L of the material roll RN ; (S2) Read the values ​​of the angular displacement sensors corresponding to each tension floating roller shaft at the start of the △ten time period, and obtain the path material belt length sway deviation value △ for each tension floating roller segment by calculation or table lookup. LTN Then, the deviation value △ of the path length of the tension floating roller section is calculated. LTN The length L of the path strip of each tension floating roller section when it is in the middle position of the swing arm TN0 By adding them together, we obtain the length L of the path material strip for each tension floating roller segment at the start of the detection. TN ; (S3) Through the coil diameter D RN The path length L of each winding and unwinding guide section is calculated, and its length varies with the diameter of the roll. XRN The length data at the start of the detection; (S4) The diameter D of the material roll in the take-up and unwinding device RN and the length L of the material roll RN The length L of the path material strip in the winding and unwinding guide section XRN The length L of the material belt along the path of the tension floating roller section. TN and the length L of each path segment with a constant length value KN Add them together to obtain the current strip length L of each roll in the laminating machine at any time. RN The total path length of each base material ΣL N ; The specific steps of step (S1) are as follows: (S11) The number of pulses N per revolution of the rotary encoder corresponding to the drive motor shaft end of the winding and unwinding device. E The value is known. (S12) During the detection start time period, the system reads the time Δte1, Δte2, Δte3, ..., ΔteM used to read the rated pulse count emitted by the rotary encoder of each take-up and unwind drive motor shaft. The system then extracts the speed values ​​n of each take-up and unwind drive motor at the beginning and end of its respective Δte1, Δte2, Δte3, ..., ΔteM time period. 11 n 12 n 21 n 22 n 31 n 32 ...n M1 n M2 ; (S13) Calculate the diameter D of the roll at the detection time of the winding and unwinding devices. RN : D R1 =(120-2n 12 *△te1)*δ F1 / [120-(n 11 +n 12 )*△te1] (1) D R2 =(120-2n 22 *△te2)*δ F2 / [120-(n 21 +n 22 )*△te2] (2) D R3 =(120-2n 32 *△te3)*δ F3 / [120-(n 31 +n 32 )*△te3] (3) …… D RM =(120-2n M2 *△teM*(Σδ F +Sd G ) / [120-(n M1 +n M2 )*△teM] (4) Where: D R1 D R2 D R3 D RM These are the diameters of the first substrate unwound roll, the second substrate unwound roll, the third substrate unwound roll, and the rewound roll at the start of the inspection, respectively. δ F1 δ F2 δ F3 ……Σδ F The total thicknesses of the first substrate, the second substrate, the third substrate, and the multilayer composite film are respectively. δ 胶1 δ 胶2 ……Σδ G These are the thicknesses of the first adhesive layer, the second adhesive layer, and the total thickness of all adhesive layers; n 11 n 12 The motor speed values ​​of the first unwinding motor extracted by the system at the beginning and end of the △te1 detection time period; n 21 n 22 The system extracts the motor speed values ​​of the second unwinding motor at the beginning and end of the △te2 detection time period; n 31 n 32 The motor speed values ​​of the third unwinding motor at the beginning and end of the △te3 detection time period are extracted by the system. n M1 n M2 The motor speed values ​​of the winding motor at the beginning and end of the △teM detection time period are extracted by the system. (S14) Calculate the strip length L of the material roll in the take-up and unwinding devices. RN : L R1 =π(D R1 2 -d A 2 ) / 4d F1 (5) L R2 =π(D R2 2 -d B 2 ) / 4d F2 (6) L R3 =π(D R3 2 -d C 2 ) / 4d F3 (7) …… L RM =π(D RM 2 -d M 2 ) / 4(Sd F +Sd G ) (8) Where: L R1 L R2 L R3 ...L RM These are the lengths of the first base material strip, the second base material strip, the third base material strip, and the composite film strip, respectively, corresponding to the diameter of the roll at the start of the detection. d A d B d C d M These refer to the core diameters of the first base material roll, the second base material roll, the third base material roll, and the composite film take-up roll, respectively.

2. The method for online detection and calculation of the length of multi-layer composite material strip according to claim 1, characterized in that: The specific steps of step (S2) are as follows: (S21) Install a floating roller swing arm and an angular displacement sensor to detect the rotation angle of the floating roller shaft on the tension floating roller shaft. The swing roller is installed on the floating roller swing arm. When the floating roller swing arm rotates, the output value of the angular displacement sensor changes linearly. During machine debugging, the range of the measured output value is set to correspond to the left and right extreme swing positions of the swing arm, and the midpoint of the output value is in the middle position of the swing arm. (S22) Based on the reading range of the angular displacement sensor and the actual swing range of the swing arm, set several corresponding relationship groups consisting of two sets of values: angular displacement reading and swing arm rotation angle; (S23) Calculate or use a mapping method to obtain the length L of the material strip along the path of the two fixed guide rollers before and after the floating roller at each set angle. TNX ; The length of the material path when the floating roller is in the middle position of the swing is L, which is the length of the material path when the tension floating roller section is in the middle position of the swing arm. TN0 ; The path length L of the floating roller segment at each of the remaining swing angles TNX With L TN0 The difference (L) TNX -L TN0 ) represents the deviation value Δ of the belt length along the tension floating roller segment corresponding to the angular displacement reading. LTN The corresponding relationship is listed in the path strip length deviation table of the tension floating roller section; (S24) During detection, read the output value on the angular displacement sensor and look up the corresponding deviation value Δ of the path length of the tension floating roller section in the path length deviation table. LTN And the length L of the path strip of the tension floating roller section when it is in the middle position of the swing arm. TN0 The sum of the two values ​​is the length L of the path material of the tension floating roller section at the moment of detection. TN ; L TN L TN0 +△ LTN0 (9) (S25) When the angular displacement sensor reading cannot be found in the table, it is calculated using linear interpolation.

3. The method for online detection and calculation of the length of multi-layer composite material strip according to claim 2, characterized in that: The specific steps of step (S3) are as follows: L XR1 =[a1 2 -0.25(D R1 -d G ) 2 ] 0.5 +π*d G *{90-θ1-arcsin[(D R1 -d G ) / 2*a1]} / 360 (10)L XR2 =[a2 2 -0.25(D R2 -d G ) 2 ] 0.5 +π*d G *{90-θ2-arcsin[(D R2 -d G ) / 2*a2]} / 360 (11)L XR3 =[a3 2 -0.25(D R3 -d G ) 2 ] 0.5 +π*d G *{90-θ3-arcsin[(D R3 -d G ) / 2*a3]} / 360 (12)…… L XRM =[a M 2 -0.25(D RM -d G ) 2 ] 0.5 +π*d G *{90-θ M -arcsin[(D R1 -d G ) / 2*a M ]} / 360 (13) Where: L XR1 L XR2 L XR3 L XRM These are the path lengths of the winding and unwinding guide sections of the first substrate unwinding device, the second substrate unwinding device, and the third substrate unwinding and winding device, respectively. d G The diameter of the fixed guide rollers for unwinding and winding; a1, a2, a3, a M This is the center distance between the material roll and the corresponding fixed guide roller; θ1, θ2, θ3, θ M It is the angle between the line connecting the center of the material roll and the center of the corresponding fixed guide roller and the horizontal line.

4. The method for online detection and calculation of the length of a multi-layer composite material strip according to claim 3, characterized in that: The specific steps of step (S4) are as follows: The definitions and calculation formulas for the segmented and total lengths of each substrate path strip are as follows: L R1 L R2 L R3 L RM The lengths of the strip contained in the roll at the time of detection are respectively the unwinding of the first substrate, the unwinding of the second substrate, the unwinding of the third substrate, and the winding of the composite film, calculated according to formulas (5), (6), (7), and (8); where D is in the formula. R1 D R2 D R3 D RM Calculate according to formulas (1), (2), (3), and (4); L XR1 L XR2 L XR3 L XRM The lengths of the guide strips for the first substrate unwinding, the second substrate unwinding, the third substrate unwinding, and the composite film winding at the detection time are calculated according to formulas (10), (11), (12), and (13). L T11 L T21 L T31 The lengths of the material strips in the first tension floating roller section of the first substrate unwinding, second substrate unwinding, and third substrate unwinding paths are calculated according to formulas (14), (15), and (16). L T12 L T22 The lengths of the material strip in the second tension floating roller section of the path for unwinding the first substrate and the second substrate are respectively calculated according to formulas (17) and (18); L T11 L T110 +△ LT11 (14) L T21 L T210 +△ LT21 (15) L T31 L T310 +△ LT31 (16) L T12 L T120 +△ LT12 (17) L T22 L T220 +△ LT22 (18) Among them, L T110 L T210 L T310 These are the lengths of the material strip along each tension floating roller segment when the swing arms of the first floating roller in the first unwinding path, the first floating roller in the second unwinding path, and the first floating roller in the third unwinding path are in the middle position. L T120 L T220 These are the lengths of the material strip along each tension floating roller segment when the swing arm of the second floating roller in the first unwinding path and the second floating roller in the second unwinding path is in the middle position. △ LT11 , △ LT21 , △ LT31 These are the path length deviations of the first floating roller in the first unwinding path, the first floating roller in the second unwinding path, and the tension floating roller section in the third unwinding path, respectively. △ LT12 , △ LT22 These are the deviations in the length of the material strip path of the tension floating roller segment of the second floating roller in the first unwinding path and the second floating roller in the second unwinding path, respectively. L K11 L is the length of the fixed path strip between the first unwinding fixed guide roller and the first substrate path, and the first floating roller device. K12 L is the length of the fixed path material strip between the first floating roller device of the first substrate and the first coating unit. K13 The length of the fixed path strip between the second floating roller device of the first substrate and the composite unit is the length of the three strip segments. The length of these three strip segments remains unchanged and is measured by drawing. L K21 L is the length of the fixed path strip between the second unwinding fixed guide roller of the second substrate and the first floating roller device of the second substrate path. K22 L is the length of the fixed path material strip between the first floating roller device and the second coating unit for the second substrate. K23 The length of the fixed path strip between the second floating roller device of the second substrate and the composite unit is the length of the three strip segments. The length of these three strip segments remains unchanged and is measured by drawing method. L K31 L is the length of the fixed path strip between the third unwinding fixed guide roller of the third substrate and the first floating roller device of the third substrate path. K32 The length of the fixed path material strip between the first floating roller device of the third substrate and the composite unit is the length of the two segments of the material strip, which remains unchanged and is measured by drawing method. L KM The length of the material strip along the path of the composite film from the composite unit to the winding fixed guide roller is constant and is measured by graphical method. L1, L2, L3 and L M The lengths of the material strips from the first substrate, the second substrate, and the third substrate from unwinding to the composite unit, and the length of the material strip from the composite film from winding to the composite unit, are calculated according to formulas (19), (20), (21), and (22), respectively. L1=L R1 +L XR1 +L K11 +L T11 +L K12 +L T12 +L K13 (19) L2=L R2 +L XR2 +L K21 +L T21 +L K22 +L T22 +L K23 (20) L3=L R3 +L XR3 +L K31 +L T31 +L K32 (21) L M L RM +L XRM +L KM (22) 5. The method for online detection and calculation of the length of a multi-layer composite material strip according to claim 1 or 2, characterized in that: The steps for calculating the roll diameter at the detection time using the winding and unwinding devices are as follows: D R1 =(50 / 3π)*V*△te1*I1+δ F1 (23) D R2 =(50 / 3π)*V*△te2*I2+δ F2 (24) D R3 =(50 / 3π)*V*△te3*I3+δ F3 (25) …… D RM =(50 / 3π)*V*△tem*I m +Sd F +Sd G (26) Sd F =(δ F1 +d F2 +……+d FI ) Sd G =(δ 胶1 +d 胶2 +……+d 胶(I-1) ) Among them, D R1 D R2 D R3 D RM The diameters of the first substrate unwinding roll, the second substrate unwinding roll, the third substrate unwinding roll, and the winding roll are respectively; The strip length corresponding to the diameter of the material roll is: L R1 =π[(50V*△te1*I1 / 3π+δ F1 ) 2 -d A 2 ] / 4d F1 (27) L R2 =π[(50V*△te2*I2 / 3π+δ F2 ) 2 -d B 2 ] / 4d F2 (28) L R3 =π[(50V*△te2*I3 / 3π+δ F3 ) 2 -d C 2 ] / 4d F3 (29) …… L RM =π[(50 / 3π)*V*△tem*Im+Σδ F +Sd G ) 2 -d M 2 ] / 4(Sd F +Sd G ) (30) Among them, L R1 L R2 L R3 L RM These are the lengths of the first base material strip, the second base material strip, the third base material strip, and the composite film strip corresponding to the diameter of the tested roll. δ F1 δ F2 δ F3 ……Σδ F The thicknesses of the first substrate, the second substrate, the third substrate, and the multilayer composite film are respectively. δ 胶1 δ 胶2 ……Σδ G These are the thicknesses of the first adhesive layer, the second adhesive layer, and the total thickness of all adhesive layers; d A d B d C d M These are the core diameters of the first base material roll, the second base material roll, the third base material roll, and the composite film take-up roll, respectively. I1, I2, I3, and Im are the transmission ratios of each unwinding and rewinding drive shaft. V represents the linear velocity of the composite steel roller set by the detection system at the specified time.

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