CN109635409B

CN109635409B - Method and device for controlling length of base material graph and text in compounding process and readable storage medium

Info

Publication number: CN109635409B
Application number: CN201811484225.3A
Authority: CN
Inventors: 左光申; 黄顺利; 鲁洋华
Original assignee: SINOMECH CORP
Current assignee: SINOMECH CORP
Priority date: 2018-12-05
Filing date: 2018-12-05
Publication date: 2022-11-29
Anticipated expiration: 2038-12-05
Also published as: CN109635409A

Abstract

The invention relates to the technical field of compound machines, and discloses a method and a device for controlling the length of a base material image-text in a compound process and a readable storage medium, wherein the method comprises the following steps: detecting the state of the compound machine in real time; when the compound machine is detected to be in a working state, calculating a first stretching amount of the repetition region according to the initial length of the repetition region and the current length of the repetition region, and adjusting the air pressure of the tension cylinder according to the first stretching amount; when the compound machine is detected to be in a standby state, the second stretching amount of the repeated area is calculated according to the first length variation, the second length variation and the third length variation, and the air pressure of the tension air cylinder is adjusted according to the second stretching amount to adjust the tension value of the base material, so that the image-text length variation of the printing base material can be adjusted when the compound machine is in a working state or in the standby state, the problem that the compound product is deformed too much in the production process of the compound machine is effectively avoided, and the quality of the compound product is guaranteed.

Description

Method and device for controlling length of base material graph and text in compounding process and readable storage medium

Technical Field

The invention relates to the technical field of compound machines, in particular to a method and a device for controlling the length of a base material image-text in a compound process and a readable storage medium.

Background

A compound machine is a device which bonds two or more layers of materials into a whole; among them, the most common way is to bond them together with a special adhesive.

At present, the application of compound machines is more and more common, and the variety of composite base materials is more and more extensive, wherein most of the gummed composite base materials are printing materials. In the production process of the compound machine, the compound base material needs to pass through a longer transfer channel; therefore, for materials with high stretchability, such as Polyethylene (PE), polyethylene terephthalate (NY), etc., if the tension is not appropriate, the composite product is deformed too much, which may result in substandard product quality or even failure of subsequent processing.

Disclosure of Invention

The invention aims to provide a method and a device for controlling the length of a base material image-text in a compounding process and a readable storage medium, which are used for solving the technical problem that the compound product is easy to deform too much in the production process of a compounding machine, so that the quality of the compound product is ensured.

In order to solve the technical problem, the invention provides a method for controlling the length of a base material image-text in a compounding process, which is suitable for a compounding machine and comprises the following steps:

detecting the state of the compound machine in real time;

when the state of the compound machine is detected to be a working state, acquiring the initial length of a repetition region of a printing base material in the compound machine, and detecting the current length of the repetition region in real time;

calculating a first stretch amount of the repetition region according to the initial length of the repetition region and the current length of the repetition region; and adjusting the air pressure value of the tension air cylinder according to the first stretching amount obtained by calculation so as to adjust the image-text length variation of the printing base material in a working state.

Compared with the prior art, according to the control method for the length of the text and the image of the base material in the compounding process disclosed by the embodiment of the invention, when the state of the compounding machine is detected to be the working state, the first stretching amount of the repeating area is calculated through the obtained initial length of the repeating area and the current length of the repeating area, and the air pressure value of the tension air cylinder is adjusted according to the first stretching amount to adjust the tension on the compounding machine, so that the variable quantity of the length of the text and the image of the printing base material in the compounding process is adjusted, the variable quantity is in a controllable range, the problem of overlarge deformation of a compound product in the production process of the compounding machine is effectively avoided, and the quality of the compound product is ensured.

As a preferred scheme, a plurality of end-to-end repeat regions are arranged on the printing substrate, and a plurality of color codes which are sequentially arranged and have different colors are arranged in the repeat regions; wherein, in two adjacent repeat regions, the distance between color patches with the same color is the same as the length of the repeat region;

the real-time detection of the current length of the repetition region comprises the following steps:

detecting the time difference obtained when color codes with the same color pass through the same detection point and the instantaneous linear speed of the printing substrate in two adjacent repeated areas in real time;

calculating to obtain a current length value of the repeating area according to the detected time difference and the instantaneous linear speed of the printing substrate:

Lc＝Δt*V

wherein L is _c Is the current length of the repetition region, Δ t is the time difference; v is the instantaneous linear velocity of the printing substrate.

As a preferred scheme, the real-time detection of the time difference obtained when color patches with the same color pass through the same detection point in two adjacent repeat areas specifically includes:

detecting a color patch on the printed substrate;

when a first color scale is detected, screening to obtain a second color scale which is adjacent to the repetition region where the first color scale is located and has the same color as the first color scale according to the initial length of the repetition region;

and detecting the time difference obtained when the first color mark and the second color mark pass through the same detection point in real time.

Preferably, the method for controlling the length of the image-text of the substrate in the compounding process further comprises: acquiring characteristic parameters of the printing base material, and acquiring an initial air pressure value of a tension air cylinder and a minimum air pressure value of the tension air cylinder, which meets the normal operation of a machine, based on the characteristic parameters of the printing base material; wherein the characteristic parameters of the printing substrate comprise a material characteristic coefficient, a shape width value and a thickness value of the printing substrate;

calculating a first stretching amount of the repeated region according to the initial length of the repeated region and the current length of the repeated region; and adjusting the air pressure value of the tension cylinder according to the first stretching amount so as to adjust the image-text length variation of the printing substrate in a working state, and the method comprises the following steps:

s31, calculating a first stretching amount of the repeated region according to the initial length of the repeated region and the current length of the repeated region:

ΔL ₁ ＝L _c -L ₀

wherein, Δ L ₁ Is the first stretch magnitude; l is _c Is the current length value of the repeated area; l is ₀ Is the initial length value of the repeated area;

s32, calculating a first difference ratio between the first stretching amount and a preset allowable variable length:

ξ _c1 ＝(ΔL ₁ -ΔA)/ΔA

wherein ξ _c1 Is the first difference ratio; Δ L ₁ Is the first stretch magnitude; Δ a is the allowable variable length value;

s33, judging whether the first difference proportion is larger than a preset allowable calculation difference;

s34, when the first difference proportion is larger than the allowable calculation difference, executing a step S35; when the first difference proportion is smaller than or equal to the allowable calculation difference, stopping adjusting the air pressure of the tension air cylinder;

s35, calculating a first air pressure adjusting quantity of the tension air cylinder according to the following formula:

ΔP ₁ ＝K ₁ ×(P ₀ -P _min )/N ₁

wherein, Δ P ₁ Adjusting the first air pressure by the amount; k ₁ Calculating a step size coefficient, K, for a first iteration of a current time instant ₁ ∈(1，N ₁ )，K ₁ Is 1; p ₀ The initial air pressure value of the tension air cylinder is obtained; p _min Is the minimum air pressure value of the tension air cylinder; n is a radical of ₁ Is the maximum value of the first iteration coefficient; when the first difference ratio is less than 1, N ₁ Take 5/xi _c1 The largest integer of (a); when the first difference ratio is greater than 1, N ₁ Take 5 xi _c1 The largest integer of (a);

s36, after the first air pressure adjustment increment is obtained, adding 1 to the first iterative calculation step length coefficient at the current moment and storing the first iterative calculation step length coefficient, and calculating the first target air pressure according to the following formula:

P ₁ ＝P _{current 1} -ΔP ₁

Wherein, P ₁ Is the first target air pressure value; p _{Current 1} The air pressure value of the tension cylinder at the current moment is the air pressure value when the compound machine is in a working state;

s37, controlling the air pressure value of the tension air cylinder according to the calculated first target air pressure so that the first target air pressure value is used as the new current working air pressure of the tension air cylinder, so that the image-text length variation of the printing base material in the working state is adjusted, and then executing the step S31.

As a preferred scheme, the method for controlling the length of the graphics context of the base material in the composite process further comprises the following steps:

detecting a first length variation, a second length variation and a third length variation of a printing base material in a channel section of the compound machine in real time when the state of the compound machine is detected to be a standby state; wherein the first length variation is a variation in length of the printing substrate in the channel section caused by a change in position of a dancer roller in the channel section; the second length variation is a variation in length of the printing substrate in the channel section caused by rotation of the coated steel roll; the third length variation is a variation in which the length of the printing substrate in the channel section is changed due to the rotation of the composite steel roller;

calculating a second stretching amount of the repeated area according to the first length variation, the second length variation and the third length variation; and adjusting the air pressure value of the tension air cylinder according to the second stretching amount obtained by calculation so as to adjust the image-text length variation of the printing base material in a standby state.

Preferably, the detecting the first length variation of the printing substrate located in the channel section of the compound machine in real time includes:

acquiring the initial elongation of the tension cylinder, and detecting the current elongation of the tension cylinder in real time;

according to the initial elongation of the tension cylinder, obtaining the initial length of the base material around the oscillating roller corresponding to the initial elongation of the tension cylinder; according to the current elongation of the tension cylinder, the current length of the base material around the swing roller corresponding to the current elongation of the tension cylinder is obtained; the peripheral base material of the oscillating roller is a printing base material positioned between the coating steel roller and the first aluminum guide roller in the channel section; the coating steel roller and the first aluminum guide roller are respectively adjacent to the tension swing roller in the channel section;

calculating to obtain the first length variation according to the initial length of the base material around the swing roller and the current length of the base material around the swing roller:

ΔL _{swing roller} ＝L _{Swinging roller} -L _{Swing roller 0}

Wherein, Δ L _{Swinging roller} Is the first length variation; l is a radical of an alcohol _{Swing roller} The current length of the base material around the oscillating roller is obtained; l is _{Swing roller 0} Is the initial length of the substrate around the oscillating roller.

The real-time detection is located the second length variation of the printing substrate of compounding machine passageway section, specifically is:

acquiring the diameter of the coating steel roller, and detecting the rotation angle of the coating steel roller in real time;

and calculating to obtain the second length variation according to the diameter of the coating steel roller and the corner of the coating steel roller:

ΔL _coating(s) ＝πD _Coating(s) θ _{Coating composition}

Wherein, Δ L _{Coating composition} Is the second length variation; d _{Coating composition} Is the diameter of the coated steel roll; theta.theta. _{Coating composition} Is the corner of the coated steel roll;

the real-time detection is located the third length variation of the printing substrate of compounding machine passageway section, specifically is:

acquiring the diameter of the composite steel roller, and detecting the corner of the composite steel roller in real time;

and calculating to obtain the third length variation according to the diameter of the composite steel roller and the corner of the composite steel roller:

ΔL _{compound medicine} ＝πD _{Compound medicine} θ _{Compound medicine}

Wherein, Δ L _{Compound medicine} Is the third length variation; d _{Compound medicine} The diameter of the composite steel roller; theta _{Compound medicine} Is the corner of the composite steel roll.

Preferably, the method for controlling the length of the image-text of the substrate in the compounding process further comprises: acquiring characteristic parameters of the printing base material, and acquiring an initial air pressure value of a tension air cylinder and a minimum air pressure value of the tension air cylinder, wherein the minimum air pressure value meets the normal operation of a machine, based on the characteristic parameters of the printing base material; wherein the characteristic parameters of the printing substrate comprise a material characteristic coefficient, a shape width value and a thickness value of the printing substrate;

calculating a second stretching amount of the repeated area according to the first length variation, the second length variation and the third length variation; adjusting the air pressure value of the tension air cylinder according to the second stretching amount obtained by calculation; the method comprises the following steps:

s51, calculating the second stretching amount according to the following formula:

∑Δ＝ΔL _{swinging roller} +ΔL _{Coating composition} +ΔL _{Compound medicine}

Wherein Σ Δ is the total variation value of the print substrate length in the channel segment; Δ L ₂ A second stretch magnitude for the repeat region; Δ L _{Swing roller} Is the first length variation value; Δ L _Coating(s) Is the second length variation value; Δ L _{Compound medicine} Is the third length variation value; n is a multiple of the total length of the printing substrate located in the channel section of the compound machine to the initial length of the repeat area.

S52, calculating a second difference ratio between the second stretching amount and a preset allowable variable length:

ξ _c2 ＝(ΔL ₂ -ΔA)/ΔA

wherein ξ _c2 Is the firstThe difference value proportion; Δ L ₂ Is the second stretch magnitude; Δ a is the allowable variable length value;

s53, judging whether the second difference ratio is larger than a preset allowable calculation difference;

s54, when the second difference proportion is larger than the allowable calculation difference, executing a step S55; when the second difference proportion is smaller than or equal to the allowable calculation difference, stopping adjusting the air pressure of the tension air cylinder;

s55, calculating a second air pressure regulating quantity of the tension air cylinder according to the following formula:

ΔP ₂ ＝K ₂ ×(P ₀ -P _min )/N ₂

wherein, Δ P ₂ Adjusting the second air pressure; k ₂ Calculating a step size coefficient, K, for a second iteration of the current time ₂ ∈(1，N ₂ )，K ₂ Is 1; p ₀ The initial air pressure value of the tension air cylinder is obtained; p _min Is the minimum air pressure value of the tension air cylinder; n is a radical of ₂ Is the second iteration coefficient maximum; when the second difference ratio is less than 1, N ₂ Take 5/xi _c1 The largest integer of (a); when the second difference ratio is greater than 1, N ₂ Take 5 xi _c1 The largest integer of (a);

s56, after the second air pressure adjusting increment is obtained, adding 1 to a second iterative calculation step coefficient at the current moment and storing, and calculating a second target air pressure according to the following formula:

P ₂ ＝P _{current 2} -ΔP ₂

Wherein, P ₂ Is the second target air pressure value; p is _{Current 2} The air pressure value of the tension cylinder at the current moment is the air pressure value when the compound machine is in a standby state;

and S57, controlling the air pressure value of the tension air cylinder according to the calculated second target air pressure so that the second target air pressure value is used as the new current working air pressure of the tension air cylinder to adjust the image-text length variation of the printing base material in the standby state, and then executing the step S51.

In order to solve the same technical problem, the present invention further provides a device for controlling the length of graphics and text on a substrate in a composite process, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the method for controlling the length of graphics and text on a substrate in a composite process according to the above embodiment when executing the computer program.

Preferably, the control device for the length of the picture and text on the base material in the compounding process further comprises a sensor element for directly or indirectly detecting the length signal and an instruction conversion element for adjusting the tension:

the sensor element includes: a color code probe arranged at the edge of the substrate advancing path; a rotary encoder mounted on the shaft of the motor; a linear displacement sensor mounted on the tension cylinder; and an angular displacement sensor mounted on the swing arm shaft of the swing roller.

The command conversion element comprises a digital air pressure regulating valve which is arranged on a control air path and connected with the tension air cylinder.

In order to solve the same technical problem, the present invention further provides a readable storage medium, which includes a stored computer program, wherein when the computer program runs, an apparatus in which the readable storage medium is controlled performs the method for controlling the length of the graphics context of the substrate in the composite process described in the above embodiment.

Drawings

Fig. 1 is a schematic structural diagram of a compound machine in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a channel segment of a compound machine according to an embodiment of the present invention;

FIG. 3 is a flowchart illustrating a method for controlling the length of a substrate during a compositing process according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a printed substrate according to one embodiment of the present invention;

FIG. 5 is a logic diagram of a method for controlling the graphic length of a substrate under operation according to one embodiment of the present invention;

FIG. 6 is a flowchart illustrating a method for controlling the length of graphics on a substrate during a compositing process according to a second embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating the variation of the length of the substrate around the oscillating roller according to the second embodiment of the present invention;

FIG. 8 is a graph showing the relationship between the elongation of the tension cylinder and the length of the base material around the oscillating roller according to the second embodiment of the present invention;

FIG. 9 is a logic diagram illustrating a method for controlling a substrate graphic length in a standby state according to a second embodiment of the present invention;

fig. 10 is a schematic structural diagram of a control device for controlling the length of a substrate during a compositing process according to a third embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

With reference to fig. 1 and fig. 2, a compound machine in the embodiment of the present invention includes a first unwinding roller 1, a coating steel roller 2, a first swing roller mechanism 3, a second swing roller mechanism 4, a second unwinding roller 5, a third swing roller mechanism 6, a compound steel roller 7, a winding roller 8, a winding tension sensor 9, and a plurality of aluminum guide rollers;

the first swing roller mechanism 3 comprises a first tension swing roller 31, a first tension air cylinder 32 and a first electric control proportional valve 33; the first electric control proportional valve 33 receives a control signal to control the air pressure of the first tension air cylinder 32, so that the first tension air cylinder 32 pushes the first tension oscillating roller 31 to oscillate, and the tension on the compound machine is adjusted. In addition, an angular displacement sensor is arranged on a swing arm shaft of the first tension swing roller 31; a linear displacement sensor for detecting the elongation of the first tension cylinder 32 is provided on the piston of the first tension cylinder 32. The second oscillating roller mechanism 4, the third oscillating roller mechanism 6 and the first oscillating roller mechanism 3 have the same structure and working principle, and are not further described herein.

The electrically controlled proportional valve is one of digital air pressure regulating valves, and may be in other forms.

In addition, a color code probe is also arranged on the compound machine; the number of the color code probes can be set according to actual use conditions; preferably, the number of the color scale probes in this embodiment is 3, which are the first color scale probe 10, the second color scale probe 11, and the third color scale probe 12; the first color mark probe 10 is arranged on a first unreeling path close to the coating steel roller 2, and the second color mark probe 12 is arranged on a channel section path close to the composite steel roller 7; the third color code probe 12 is arranged on the second unreeling path close to the composite steel roller 7; of course, the position of the color code probe can be set at other positions of the compound machine according to actual conditions.

In the embodiment of the present invention, the process of combining the printing substrates in the compound machine specifically includes: a first printing substrate in the first unreeling 1 is sequentially conveyed to the composite steel roller 7 through the second swing roller mechanism 4, the coating steel roller 2 and the first swing roller mechanism 3; a second printing base material in the second unreeling 5 is conveyed to the composite steel roller 7 through the third swing roller mechanism 6; the first printing base material and the second printing base material are compounded into a whole at the position of the compound steel roller 7 and are conveyed to the rolling roll 8. In the running path of the first printing substrate, the running path from the first unreeling 1 to the coating steel roller 2 through the second swing roller mechanism 4 is the first unreeling path; the running path from the coating steel roller 2 to the composite steel roller 7 through the first swing roller mechanism 3 is the path of the channel section; in the running path of the second printing substrate, the running path from the second unreeling 5 to the composite steel roller 7 through the third swing roller mechanism 6 is the second unreeling path. In addition, the channel section path is a channel section of the compound machine; in the channel section, a first aluminum guide roller 310 is arranged above the first tension swing roller 31, and a coating press roller 311 is arranged below the first tension swing roller 31; wherein, the coating press roller 311 is matched with the coating steel roller 2; it can be understood that, in the channel section, the coating pressure roller 311 and the first aluminum guide roller 310 are respectively adjacent to the first tension swing roller 31, and the printing substrate between the coating pressure roller 311 and the first aluminum guide roller 310 is a swing roller peripheral substrate, as shown in fig. 2.

Example one

Fig. 3 is a schematic flow chart of a method for controlling the length of a substrate image during a compositing process according to an embodiment of the present invention.

As shown in fig. 3, the method for controlling the length of the graphics and text on the substrate in the compounding process is suitable for a compounding machine, and comprises the following steps:

s1, detecting the state of the compound machine in real time;

the state of the compound machine comprises an operating state and a standby state.

S2, when the condition of the compound machine is detected to be a working condition, acquiring the initial length of a repeating area of a printing base material in the compound machine, and detecting the current length of the repeating area in real time;

in step S2, the length of the repeating region in the composite base material when the initial length of the repeating region is zero in the composite machine;

in the last step of the composite printing substrate, it is necessary to print an image and text on the printing substrate through a printing plate roller, and the repeated area is an area formed by printing the printing plate roller on the printing substrate once or more times; thus, the printing substrate comprises a plurality of said repeating regions end-to-end; additionally, the repeat area may be a plurality of printing plate lengths.

In the embodiment of the invention, a plurality of color codes which are arranged in sequence and have different colors are arranged in the repeated area; in two adjacent repeat regions, the spacing between color patches with the same color is the same as the length of the repeat region.

In step S2, the detecting the current length of the repetition region in real time includes the following steps:

s21, detecting the time difference and the instantaneous linear speed of the printing substrate, which are obtained when color marks with the same color pass through the same detection point in two adjacent repeated areas in real time;

specifically, the real-time detection of the time difference obtained when color patches with the same color pass through the same detection point in two adjacent repeat areas specifically includes:

detecting a color patch on the printed substrate;

Wherein, it is required to be noted that the deformation generated on the printing substrate is uniform, and the stretching amount of one repeated area on the printing substrate is not large and is smaller than the initial interval between the color patches in the same repeated area; therefore, when the first color patch is detected, the second color patch with the interval closest to the initial length of the repetition region to the first color patch can be obtained according to the initial length of the repetition region, the obtained repetition region where the second color patch is located is adjacent to the region where the first color patch is located, and the color of the second color patch is the same as the color of the first color patch.

For example, please refer to fig. 4, which is a schematic structural diagram of the printing substrate 100; the printing substrate 100 comprises adjacent first 101 and second 102 repeat regions; the first repeat 101 and the second repeat area 102 are identical; specifically, a first color patch 1010, a third color patch 1011, a fifth color patch 1012, a seventh color patch 1013, and a ninth color patch 1014 which are different in color are sequentially disposed on the first repeated region 101, and the distances between the color patches in the first repeated region 101 are equal; a second color mark 1020, a fourth color mark 1021, a sixth color mark 1022, an eighth color mark 1023 and a tenth color mark 1024 which are different in color are sequentially arranged on the second repeated area 102, and the color marks in the second repeated area 102 are equal in spacing; wherein the first color scale 1010 and the second color scale 1020 have the same color, and the third color scale1011 is of the same color as the fourth color marker 1021, and so on. The length L of the first repeating region 101 _Region(s) A length of the second repeating area 102, a distance L between the first color standard 1010 and the second color standard 1020 _{Distance between} The spacing between the third color patch 1011 and the fourth color patch 1021, the spacing between the fifth color patch 1012 and the sixth color patch 1022, the spacing between the seventh color patch 1013 and the eighth color patch 1023, and the spacing between the ninth color patch 1014 and the tenth color patch 1024 are all equal; it is understood that when the first color mark 1010 is detected, since the amount of stretch of one of the repeating areas on the printed substrate is not large, the second color mark 1020, which is spaced from the first color mark 1010 by the closest initial length of the repeating area, can be selected based on the initial length of the repeating area.

In order to improve the operation efficiency of the multifunction device, the method further includes, when performing step S21: when a first color code is detected and a second color code is obtained through screening, taking the first color code and the second color code as a target color code group; and eliminating the rest color code information.

And S22, calculating the current length of the repeated area according to the detected time difference and the instantaneous linear speed of the printing substrate.

Specifically, the current length of the repetition region is calculated according to the following formula (1):

L _c ＝Δt×V (1)

wherein L is _c Δ t is the current length of the repetition region, Δ t is the time difference; v is the instantaneous linear velocity of the printing substrate.

The instantaneous linear velocity value of the multifunction printer is constantly changing, and the linear velocity V used for calculation here is an average value of linear velocities at two points Δ t.

S3, calculating a first stretching amount of the repeated area according to the initial length of the repeated area and the current length of the repeated area; and adjusting the air pressure value of the tension cylinder according to the first stretching amount obtained by calculation so as to adjust the image-text length variation of the printing substrate in the working state.

Before step S3 is implemented, the method for controlling the length of the graphics and text on the substrate in the compositing process further includes:

acquiring characteristic parameters of the printing base material, and acquiring a minimum air pressure value of the complex tension cylinder, which meets the normal operation of the machine, based on the characteristic parameters of the printing base material; wherein the characteristic parameters of the printing substrate comprise a material characteristic coefficient, a shape width value and a thickness value of the printing substrate;

determining the initial tension of the compound machine according to the acquired material characteristic coefficient of the printing base material, the width of the printing base material and the thickness of the printing base material; and obtaining an initial air pressure value corresponding to the initial tension according to the determined initial tension of the compound machine, and obtaining a minimum air pressure value of a corresponding tension cylinder according to a minimum tension value meeting the normal operation of the machine.

In step S3, calculating a first stretch amount of the repetition region according to the initial length of the repetition region and the current length of the repetition region; and adjusting the air pressure value of the tension cylinder according to the first stretching amount so as to adjust the image-text length variation of the printing substrate in a working state, and the method comprises the following steps:

s31, calculating a first stretching amount of the repeated region according to the initial length of the repeated region and the current length of the repeated region;

specifically, the first stretching amount is calculated according to the following formula (2):

ΔL ₁ ＝L _c -L ₀ (2)

wherein, Δ L ₁ Is the first stretch magnitude; l is a radical of an alcohol _c Is the current length value of the repeated area; l is ₀ Is an initial length value of the repetition region;

s32, calculating a first difference ratio between the first stretching amount and a preset allowable variable length amount;

specifically, the first difference ratio is calculated according to the following formula (3):

ξ _c1 ＝(ΔL ₁ -ΔA)/ΔA (3)

wherein ξ _c1 Is the first difference ratio; Δ L ₁ Is the first stretch magnitude; Δ a is the allowable variable length value; note that the allowable variable length amount is set according to the customer demand.

S33, judging whether the first difference ratio is larger than a preset allowable calculation difference;

wherein, the allowable calculation difference is 0.1-0.3;

when the first difference ratio is greater than the allowable calculation difference, the current stretching amount of the overlapping area is greater than the allowable lengthening amount, so that the tension on the compound machine needs to be adjusted to reduce the deformation amount of the printing base material; when the first difference ratio is less than or equal to the allowable calculation difference, it means that the current stretching amount of the overlapping area is less than the allowable elongation amount, and therefore, the tension on the composite machine does not need to be adjusted.

S35, calculating a first air pressure regulating quantity of the tension air cylinder according to the following formula (4):

ΔP ₁ ＝K ₁ ×(P ₀ -P _min )/N ₁ (4)

wherein, Δ P ₁ Adjusting the first air pressure by the amount; k ₁ Calculating a step size coefficient, K, for a first iteration of a current time instant ₁ ∈(1，N ₁ )，K ₁ Is 1; p ₀ The initial air pressure value of the tension air cylinder; p _min Is the minimum air pressure value of the tension air cylinder; n is a radical of hydrogen ₁ Is the maximum value of the first iteration coefficient; when the first difference ratio is less than 1, N ₁ Take 5/xi _c1 The largest integer of (a); when the first difference ratio is greater than 1, N ₁ Take 5 xi _c1 The largest integer of (a);

s36, after the first air pressure adjustment increment is obtained, adding 1 to the first iterative calculation step length coefficient at the current moment and storing the first iterative calculation step length coefficient, and calculating a first target air pressure according to the following formula (5):

P ₁ ＝P _{current 1} -ΔP ₁ (5)

Wherein, P ₁ Is the first target air pressure value; p is _{Current 1} The air pressure value of the tension cylinder at the current moment is the air pressure value when the compound machine is in a working state;

and S37, controlling the air pressure value of the tension air cylinder according to the calculated first target air pressure so as to enable the first target air pressure value to serve as the new current working air pressure of the tension air cylinder, so that the image-text length variation of the printing base material in the working state is adjusted, and then executing the step S31.

It should be noted that, when the air pressure of the tension cylinder is controlled according to the first target air pressure, the control module instructs the digital air pressure regulating valve to adjust the current air pressure of the tension cylinder to the first target air pressure value, so that the position of the swing roller in the compound machine is changed, the tension on the compound machine is changed, and the current length of the repeat area is changed, and therefore, after the air pressure of the tension cylinder is controlled according to the first target air pressure, the step S31 needs to be executed again to calculate the first stretching amount.

In addition, when the control of the variation of the repetition region is disabled, an alarm signal is transmitted.

In one embodiment, the process of adjusting the air pressure of the tension cylinder when the compound machine is in operation is specifically illustrated in fig. 5, wherein

Calculating a step size coefficient for a first iteration of a previous time instant, E _c A difference is calculated for the tolerance. Specifically, when the state of the compound machine is detected to be the working state, the air pressure value of a tension air cylinder in the compound machine is an initial air pressure value at an initial time; at this time, the time difference Δ t is detected and the printing substrate is passedThe current length L of the repetition region is obtained by calculation _c (ii) a Then according to the initial length L of the repeated region ₀ And the current length L of the repetition region _c Calculating a first stretch Δ L of the repeat region ₁ (ii) a Then calculating the first stretching amount DeltaL ₁ First difference value proportion xi between the preset allowable variable length quantity delta A and the preset allowable variable length quantity delta A _c1 (ii) a Then judging the first difference value proportion xi _c1 Whether it is greater than a preset allowable calculation difference E _c (ii) a When the first difference ratio xi _c1 Greater than said allowable calculation difference E _c While calculating the first air pressure regulating quantity delta P of the tension air cylinder ₁ (ii) a Then, adding 1 to the first iterative step-size coefficient at the current moment, and calculating a first target air pressure P ₁ (ii) a Finally, the first target air pressure P is obtained according to calculation ₁ Controlling the air pressure value of the tension air cylinder to enable the first target air pressure value P ₁ The new current working air pressure is used as a tension air cylinder, so that the tension on the compound machine is adjusted; at this time, since the current length of the overlapped area is changed due to the change of the tension, the above process is performed again, and the first stretching amount Δ L of the overlapped area is recalculated ₁ . When the first difference ratio xi _c1 Is less than or equal to the allowable calculation difference E _c And when the air pressure of the tension air cylinder is adjusted, the air pressure of the tension air cylinder is stopped.

In the embodiment of the invention, when the compound machine is in a working state, the first stretching amount of the repeating area is obtained by calculation according to the initial length of the repeating area and the current length of the repeating area, and the air pressure value of the tension air cylinder is adjusted according to the first stretching amount to adjust the tension value on the compound machine, so that the variation of the image-text length of the printing substrate is adjusted, the image-text length variation of the printing substrate is in a controllable range, and the problem of overlarge deformation of a compound product in the production process of the compound machine is effectively avoided, and the quality of the compound product is ensured.

Example two

Fig. 6 is a schematic flow chart of a method for controlling the length of a substrate image during a compositing process according to a second embodiment of the present invention.

The difference between the method for controlling the length of the graphics context of the substrate in the composite process in the embodiment and the first embodiment is as follows:

the method for controlling the length of the base material graph and text in the compounding process further comprises the following steps:

s4, detecting a first length variation, a second length variation and a third length variation of the printing base materials in the channel section of the compound machine in real time when the state of the compound machine is detected to be a standby state; wherein the first length variation is a variation in length of the printing substrate in the channel section caused by a change in position of a dancer roller in the channel section; the second length variation is a variation in which the length of the printing substrate in the channel section is changed by the rotation of the coating steel roller; the third length variation is a variation in which the length of the printing substrate in the channel section is changed due to the rotation of the composite steel roller;

when the state of the compound machine is a standby state, the printing base material is in a static state, that is, the speed of the printing base material is zero, but the base material is still in a tensioned state, at this time, due to factors such as equipment vibration and external environment, a tension swing roller in a channel section of the compound machine slightly swings, so that the length of the base material around the swing roller in the channel section changes; in addition, it causes a slight rotation of both the coating steel roll and the clad steel roll to maintain a set tension value, thereby causing a change in the length of the printing substrate in the channel section, respectively. It is understood that, when the state of the multifunction peripheral is in the standby state, only the printing substrate located in the passage section of the multifunction peripheral is deformed, and therefore, when the multifunction peripheral is in the standby state, the amount of change in the length of the printing substrate image-text in the passage section is mainly controlled.

In step S4, the real-time detecting a first length variation of the printing substrate located in the channel section of the compound machine includes the following steps:

s401, acquiring initial elongation of a tension cylinder, and detecting the current elongation of the tension cylinder in real time;

s402, obtaining an initial length value of the base material around the oscillating roller corresponding to the initial elongation of the tension cylinder according to the initial elongation of the tension cylinder; obtaining a current length value of the base material around the swing roller corresponding to the current elongation of the tension cylinder according to the current elongation of the tension cylinder;

specifically, as shown in fig. 2, the oscillating roller peripheral substrate 103 is a printing substrate located between the first aluminum roller 310 and the coating steel roller 2 in the channel section. When the multifunction device is in a standby state, the extension amount H of the first tension cylinder 32 is set to be equal to or less than the predetermined value _{Swing roller} When changed, the position of the first tension swing roller 31 is changed, so that the length of the base material 103 around the swing roller is changed, as shown in fig. 7, wherein L _{Swinging roller} The current length of the base material around the oscillating roller; l is a radical of an alcohol _{Swing roller 0} Is the initial length of the substrate around the oscillating roller.

Further, in the passage section of the complex machine, the relationship between the elongation of the tension cylinder and the length of the base material around the oscillating roller is as shown in fig. 8; therefore, when the elongation of the tension cylinder is obtained, the length of the base material around the swing roller corresponding to the elongation of the tension cylinder can be obtained by calculation or interpolation according to the relation curve between the elongation of the tension cylinder and the length of the base material around the swing roller;

in addition, it should be noted that the elongation of the tension cylinder can be detected by a linear displacement sensor provided on the tension cylinder; of course, the angular displacement sensor on the swing arm shaft in the channel section can also be adopted to determine the position variation of the first tension swing roller, and a relation curve between the position variation and the length of the base material around the swing roller is obtained through a series of calculation and analysis; it can be understood that the element for measuring the length change signal of the substrate around the oscillating roller may be a linear displacement sensor, or a displacement sensor mounted on an upper corner of an oscillating arm shaft of the oscillating roller, which is not described herein any more.

S403, calculating to obtain the first length variation value according to the initial length value of the base material around the swing roller and the current length value of the base material around the swing roller;

specifically, the first length variation value is calculated according to the following equation (6):

ΔL _{swing roller} ＝L _{Swing roller} -L _{Swing roller 0} (6)

Wherein, Δ L _{Swing roller} Is the first length variation; l is _{Swing roller} The current length of the base material around the oscillating roller; l is _{Swing roller 0} Is the initial length of the substrate around the oscillating roller.

In step S4, the detecting, in real time, a second length variation of the printing substrate located in the channel section of the compound machine is specifically:

s411, acquiring the diameter of the coating steel roller, and detecting the rotation angle of the coating steel roller in real time;

s412, calculating to obtain the second length variation according to the diameter of the coating steel roller and the rotation angle of the coating steel roller;

specifically, the second length change amount is calculated according to the following formula (7):

ΔL _coating(s) ＝πD _{Coating composition} θ _{Coating composition} (7)

Wherein, Δ L _{Coating composition} Is the second length variation value; d _Coating(s) Is the diameter of the coated steel roll; theta _{Coating composition} Is the corner of the coated steel roll;

in step S4, the detecting, in real time, a third length variation of the printing substrate located in the channel section of the compound machine is specifically:

s421, acquiring the diameter of the composite steel roller, and detecting the corner of the composite steel roller in real time;

s422, calculating to obtain the third length variable quantity according to the diameter of the composite steel roller and the corner of the composite steel roller;

specifically, the third length variation value is calculated according to the following equation (8):

ΔL _{compound medicine} ＝πD _{Compound medicine} θ _{Compound medicine} (8)

Wherein, Δ L _{Compound medicine} Is the third length variation; d _{Compound medicine} The diameter of the composite steel roller; theta _{Compound medicine} Is the corner of the composite steel roller.

S5, calculating a second stretching magnitude value of the repeated area according to the first length variation magnitude value, the second length variation magnitude value and the third length variation magnitude value; and adjusting the air pressure of a tension cylinder according to the second stretching amount obtained by calculation so as to adjust the image-text length variation of the printing base material in a standby state.

Before step S5 is implemented, the method for controlling the length of the graphics and text on the substrate in the compositing process further includes: acquiring characteristic parameters of the printing base material, and acquiring an initial air pressure value of a tension air cylinder and a minimum air pressure value of the tension air cylinder, which meets the normal operation of a machine, based on the characteristic parameters of the printing base material; wherein the characteristic parameters of the printing substrate comprise a material characteristic coefficient, a shape width value and a thickness value of the printing substrate;

determining the initial tension of the compound machine according to the acquired material characteristic coefficient of the printing base material, the width of the printing base material and the thickness of the printing base material; and obtaining an initial air pressure value of a tension air cylinder corresponding to the initial tension according to the determined initial tension of the compound machine, and obtaining a minimum air pressure value of the corresponding tension air cylinder according to a minimum tension value meeting the normal operation of the machine.

In step S5, calculating a second stretching amount of the repeated region according to the first length variation, the second length variation and the third length variation; and adjusting the air pressure of the tension air cylinder according to the calculated second stretching amount so as to adjust the length of the printing base material, and the method comprises the following steps of:

s51, calculating the second stretching amount by the following formulas (9) and (10):

∑Δ＝ΔL _{swing roller} +ΔL _Coating(s) +ΔL _{Compound medicine} (9)

Wherein Σ Δ is the total variation value of the printing substrate length in the channel section; Δ L ₂ A second stretch magnitude for the repeat region; Δ L _{Swing roller} Is the first length variation value; Δ L _{Coating composition} Is the second length variation value; Δ L _{Compound medicine} Is the third length variation value; n is a multiple of the total length of the printed substrate located in the channel section of the compound machine to the initial length of the repeat area.

S52, calculating a second difference ratio between the second stretching amount and a preset allowable variable length amount;

specifically, the second difference ratio is calculated according to the following formula (11):

ξ _c2 ＝(ΔL ₂ -ΔA)/ΔA (11)

wherein ξ _c2 Is the second difference ratio; Δ L ₂ Is the second stretch magnitude; Δ a is the allowable variable length value; it should be noted that the allowable variable length amount is set according to the customer demand.

S53, judging whether the second difference proportion is larger than a preset allowable calculation difference;

wherein the allowable calculation difference is 0.1-0.3;

when the second difference ratio is greater than the allowable calculation difference, it indicates that the current stretching amount of the repeating area is greater than the allowable elongation amount, so that the tension value on the compound machine needs to be adjusted to reduce the deformation amount of the printing base material in the channel section; when the second difference ratio is less than or equal to the allowable calculation difference, it is described that the current stretching amount of the overlap region is less than the allowable elongation amount, and therefore, it is not necessary to adjust the tension on the composite machine.

S55, calculating a second air pressure regulating quantity of the tension air cylinder according to the following formula (12):

ΔP ₂ ＝K ₂ ×(P ₀ -P _min )/N ₂ (12)

wherein, Δ P ₂ Adjusting the second air pressure; k is ₂ Calculating a step size coefficient, K, for a second iteration of the current time ₂ ∈(1，N ₂ )，K ₂ Is 1; p ₀ The initial air pressure value of the tension air cylinder; p is _min Is the minimum air pressure value of the tension air cylinder; n is a radical of hydrogen ₂ Is the second iteration coefficient maximum; when the second difference ratio is less than 1, N ₂ Take 5/xi _c1 The largest integer of (a); when the second difference ratio is greater than 1, N ₂ Take 5 xi _c1 The largest integer of (a);

s56, after the second air pressure adjusting increment is obtained, adding 1 to a second iterative calculation step coefficient at the current moment and storing, and calculating a second target air pressure value according to the following formula (13):

P ₂ ＝P _{current 2} -ΔP ₂ (13)

Wherein, P ₂ Is the second target air pressure value; p _{Current 2} The air pressure value of the tension cylinder at the current moment is the air pressure value when the compound machine is in a standby state;

s57, controlling the air pressure value of the tension cylinder according to the calculated second target air pressure value to enable the second target air pressure value to serve as the new current working air pressure of the tension cylinder, so that the image-text length variation of the printing base material in a standby state is adjusted, and then executing the step S51;

it should be noted that, when the air pressure of the tension cylinder is controlled according to the second target air pressure value, the control module instructs the digital air pressure regulating valve to adjust the current air pressure of the tension cylinder to the second target air pressure, so that the position of the swing roller is changed, the tension on the compound machine is changed, and further the length of the printing substrate in the channel section is changed, and therefore, after the air pressure of the tension cylinder is controlled according to the second target air pressure value, step S51 needs to be executed again to calculate the second stretching amount of the repeating area. In addition, the digital air pressure regulating valve can be an electric control proportional valve and can also be other control valves which can achieve the same function.

In one embodiment, the process of adjusting the air pressure of the tension cylinder when the compound machine is in the standby state is specifically shown in fig. 9, wherein

Calculating a step-size coefficient for a second iteration of the previous time instant, E _c A difference is calculated for the tolerance. Specifically, when the state of the compound machine is detected to be the working state, the air pressure value of a tension air cylinder in the compound machine is an initial air pressure value at an initial time; at this time, the initial elongation H by the tension cylinder _{Swing roller 0} And the detected current elongation H of the tensioning cylinder _{Swinging roller} Obtaining the initial length L of the corresponding base material around the oscillating roller _{Swing roller 0} And the current length L of the substrate around the oscillating roller _{Swinging roller} Thereby calculating a first length variation amount DeltaL _{Swing roller} (ii) a And passing the detected rotation angle theta of the coated steel roller _{Coating composition} Calculating a second length variation DeltaL _{Coating composition} (ii) a And passing the detected rotation angle theta of the composite steel roll _{Compound medicine} Calculating a third length variation DeltaL _{Compound medicine} (ii) a Then according to said first length variation value DeltaL _{Swing roller} The second length variation value DeltaL _{Coating composition} And said third length change magnitude Δ L _{Compound medicine} Calculating a second stretch magnitude Δ L for the repeat region ₂ (ii) a Then calculating the second stretching amount DeltaL ₂ Second difference ratio xi to preset allowable variable length quantity delta A _c2 (ii) a Then judging the second difference value proportion xi _c2 Whether it is greater than a preset allowable calculation difference E _c (ii) a When the second difference ratio xi _c2 Greater than said allowable calculation difference E _c Then, the second air pressure regulating quantity delta P of the tension air cylinder is calculated ₂ (ii) a Then adding 1 to the second iterative calculation step length coefficient at the current moment, and calculating a second target air pressure P ₂ (ii) a Finally, the second target air pressure P is obtained according to calculation ₂ Controlling the air pressure value of the tension air cylinder to enable the second target air pressure value P ₂ The new current working air pressure is used as a tension air cylinder, so that the tension on the compound machine is adjusted; at this time, since the current length of the overlapped area is changed due to the change of the tension, the above process is performed again to calculate the second stretching amount Δ L of the overlapped area ₂ . When the second difference ratio xi _c2 Is less than or equal to the allowable calculation difference E _c When the air pressure of the tension cylinder is stopped to be adjusted

In the embodiment of the invention, when the state of the compound machine is the working state, calculating to obtain a first stretching amount of the repeated area according to the initial length of the repeated area and the current length of the repeated area, and adjusting the air pressure of a tension air cylinder according to the first stretching amount to adjust the tension on the compound machine; in addition, when the state of the compound machine is a standby state, the second stretching amount of the repeating area is obtained by calculation according to the first length variation, the second length variation and the third length variation, and the tension on the compound machine is adjusted by adjusting the air pressure of a tension air cylinder according to the second stretching amount, so that the image-text length variation of the printing base material in the compound process can be adjusted when the compound machine is in an operating state or a standby state, the variation is in a controllable range, the problem that the compound product is excessively deformed in the compound machine production process is further effectively avoided, and the quality of the compound product is ensured.

EXAMPLE III

Fig. 7 is a schematic structural diagram of a device for controlling the length of graphics and text on a substrate in a compositing process according to a third embodiment of the present invention.

The device for controlling the length of the substrate in the composite process comprises at least one processor 200, such as a CPU, at least one network interface 201 or other user interface 202, a memory 203, and at least one communication bus 204, wherein the communication bus 204 is used for realizing the connection and communication among the components. The user interface 202 may optionally include a USB interface, and other standard interfaces, wired interfaces. The network interface 201 may optionally include a Wi-Fi interface as well as other wireless interfaces.

In addition, the control device for the length of the picture and text of the base material in the compounding process also comprises a sensor element for directly or indirectly detecting a length signal and an instruction conversion element for adjusting tension:

In some embodiments, the memory 203 stores elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:

an operating system 2031, containing various system programs such as a battery management system and the like, for implementing various basic services and for processing hardware-based tasks;

procedure 2032.

Specifically, the processor 200 is configured to call the program 2032 stored in the memory 203 to execute the method for controlling the length of the graphics context of the substrate in the composite process according to the foregoing embodiment, such as steps S1 to S3 shown in fig. 3 and steps S1 to S5 shown in fig. 5.

In an embodiment of the present invention, the computer program may be divided into one or more modules/units, which are stored in the memory and executed by the processor 200 to accomplish the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program in the control device for the substrate image length in the compositing process.

The control device for controlling the length of the graphics text on the substrate in the compositing process can include, but is not limited to, the processor 200 and the memory 203. It will be appreciated by those skilled in the art that the schematic diagram is merely an example of a control device for controlling the length of the substrate during the compounding process, and does not constitute a limitation on the control device for controlling the length of the substrate during the compounding process, and may include more or fewer components than those shown, or some of the components may be combined, or different components, for example, the control device for controlling the length of the substrate during the compounding process may further include input and output devices, network access devices, buses, and the like.

The Processor 203 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, and the processor 200 is a control center of the control device for the substrate image-text length in the compounding process, and various interfaces and lines are used to connect various parts of the control device for the substrate image-text length in the whole compounding process.

The memory 203 can be used for storing the computer program and/or the module, and the processor 200 can realize various functions of the control device for the substrate image-text length in the composite process by operating or executing the computer program and/or the module stored in the memory and calling the data stored in the memory. The memory 203 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory 203 may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.

Wherein, the integrated module/unit of the control device for the substrate image-text length in the composite process can be stored in a computer readable storage medium if the module/unit is realized in the form of a software functional unit and is sold or used as an independent product. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments described above may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer-readable medium may contain suitable additions or subtractions depending on the requirements of legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer-readable media may not include electrical carrier signals or telecommunication signals in accordance with legislation and patent practice.

Further, it should be noted that:

1) The embodiment of the present invention is based on a type in which the dancer roll is used to control the tension in the multifunction machine, and the same signal detection → calculation of the amount of change in length → tension adjustment → control of the amount of change in length can be used in the type in which the tension sensor or other tension control is used. 2) The deformation of the base material of each tension section of the compound machine can be controlled in a similar manner.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A control method for the length of a base material graph and text in a compounding process is suitable for a compounding machine and is characterized by comprising the following steps:

detecting the state of the compound machine in real time;

calculating a first stretch amount of the repetition region according to the initial length of the repetition region and the current length of the repetition region; and adjusting the air pressure value of the tension cylinder according to the first stretching amount obtained by calculation so as to adjust the image-text length variation of the printing substrate in the working state.

2. The method for controlling the length of the image and text on the substrate in the composite process according to claim 1, wherein a plurality of end-to-end repeat regions are arranged on the printing substrate, and a plurality of color patches which are arranged in sequence and have different colors are arranged in the repeat regions; wherein, in two adjacent repeat regions, the distance between color patches with the same color is the same as the length of the repeat region;

Lc＝Δt*V

wherein the content of the first and second substances,L _c is the current length of the repetition region, Δ t is the time difference; v is the instantaneous linear velocity of the printing substrate.

3. The method for controlling the length of the image-text of the substrate in the composite process according to claim 2, wherein the real-time detection of the time difference obtained when the color scale with the same color passes through the same detection point in two adjacent repeat areas specifically comprises:

detecting a color patch on the printed substrate;

when a first color mark is detected, screening to obtain a second color mark which is adjacent to the repetition region where the first color mark is located and has the same color as the first color mark according to the initial length of the repetition region;

4. The method for controlling the length of the substrate during the compounding process according to any one of claims 1 to 3, wherein the method for controlling the length of the substrate during the compounding process further comprises: acquiring characteristic parameters of the printing base material, and acquiring an initial air pressure value of a tension air cylinder and a minimum air pressure value of the tension air cylinder, which meets the normal operation of a machine, based on the characteristic parameters of the printing base material; wherein the characteristic parameters of the printing substrate comprise a material characteristic coefficient, a shape width value and a thickness value of the printing substrate;

calculating a first stretching amount of the repetition region according to the initial length of the repetition region and the current length of the repetition region; and adjusting the air pressure value of the tension cylinder according to the first stretching amount so as to adjust the image-text length variation of the printing substrate in a working state, and the method comprises the following steps:

s31, calculating a first stretching amount of the repeated area according to the initial length of the repeated area and the current length of the repeated area:

ΔL ₁ ＝L _c -L ₀

ξ _c1 ＝(ΔL ₁ -ΔA)/ΔA

wherein xi is _c1 Is the first difference ratio; Δ L ₁ Is the first stretch magnitude; Δ a is the allowable variable length value;

s35, calculating a first air pressure regulating quantity of the tension air cylinder according to the following formula:

ΔP ₁ ＝K ₁ ×(P ₀ -P _min )/N ₁

P ₁ ＝P _{current 1} -ΔP ₁

Wherein, P ₁ Is the first target air pressure value; p _{Current 1} In the state that the compound machine is in workingMeanwhile, the air pressure value of the tension cylinder at the current moment;

5. The method for controlling the length of the substrate during the compounding process according to any one of claims 1 to 3, wherein the method for controlling the length of the substrate during the compounding process further comprises the steps of:

detecting a first length variation, a second length variation and a third length variation of a printing base material in a channel section of the compound machine in real time when the state of the compound machine is detected to be a standby state; wherein the first length variation is a variation in which a change in length of the print substrate in the channel section is caused by a change in position of a dancer roll in the channel section; the second length variation is a variation in which the length of the printing substrate in the channel section is changed by the rotation of the coating steel roller; the third length variation is a variation in which the length of the printing substrate in the channel section is changed due to the rotation of the composite steel roller;

6. The method for controlling the length of a substrate during a compositing process of claim 5,

the real-time detection is located the first length variation of the printing substrate of the passageway section of compounding machine, specifically is:

ΔL _{swinging roller} ＝L _{Swing roller} -L _{Swing roller 0}

Wherein, Δ L _{Swinging roller} Is the first length variation; l is _{Swing roller} The current length of the base material around the oscillating roller is obtained; l is _{Swing roller 0} Is the initial length of the substrate around the oscillating roller;

ΔL _{coating composition} ＝πD _{Coating composition} θ _Coating(s)

Wherein, Δ L _Coating(s) Is the second length variation; d _{Coating composition} Is the diameter of the coated steel roll; theta _Coating(s) Is the corner of the coated steel roll;

ΔL _{compound medicine} ＝πD _{Compound medicine} θ _{Compound medicine}

7. The method for controlling the length of the graphics on the substrate during the compositing process as recited in claim 6, wherein the method for controlling the length of the graphics on the substrate during the compositing process further comprises: acquiring characteristic parameters of the printing base material, and acquiring an initial air pressure value of a tension air cylinder and a minimum air pressure value of the tension air cylinder, which meets the normal operation of a machine, based on the characteristic parameters of the printing base material; wherein the characteristic parameters of the printing substrate comprise a material characteristic coefficient, a shape width value and a thickness value of the printing substrate;

∑Δ＝ΔL _{swing roller} +ΔL _{Coating composition} +ΔL _{Compound medicine}

Wherein Σ Δ is the total variation value of the print substrate length in the channel segment; Δ L ₂ A second stretch value for the repeat region; Δ L _{Swing roller} Is the first length variation value; Δ L _{Coating composition} Is the second length variation value; Δ L _{Compound medicine} Is the third length variation value; n is a multiple of the total length of the printed substrate located in the channel section of the compound machine to the initial length of the repeat area;

ξ _c2 ＝(ΔL ₂ -ΔA)/ΔA

wherein xi is _c2 Is the second difference ratio; Δ L ₂ Is the second stretch magnitude; Δ a is the allowable variable length value;

ΔP ₂ ＝K ₂ ×(P ₀ -P _min )/N ₂

wherein, Δ P ₂ Adjusting the second air pressure; k ₂ Calculating a step-size coefficient, K, for a second iteration of the current time instant ₂ ∈(1，N ₂ )，K ₂ Is 1; p is ₀ The initial air pressure value of the tension air cylinder; p is _min Is the minimum air pressure value of the tension air cylinder; n is a radical of ₂ Is the second iteration coefficient maximum; when the second difference ratio is less than 1, N ₂ Take 5/xi _c1 The largest integer of (a); when the second difference ratio is greater than 1, N ₂ Take 5 xi _c1 The largest integer of (a);

s56, after the second air pressure adjusting increment is obtained, adding 1 to the second iterative calculation step length coefficient at the current moment, storing, and calculating a second target air pressure according to the following formula:

P ₂ ＝P _{current 2} -ΔP ₂

and S57, controlling the air pressure value of the tension air cylinder according to the calculated second target air pressure so that the second target air pressure value is used as the new current working air pressure of the tension air cylinder, so as to adjust the image-text length variation of the printing base material in the standby state, and then executing the step S51.

8. An apparatus for controlling the length of a substrate during a compositing process, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor, when executing the computer program, implements the method for controlling the length of a substrate during a compositing process according to any of claims 1-7.

9. The apparatus for controlling the length of a substrate during a compositing process of claim 8, further comprising a sensor element for directly or indirectly sensing the length signal and a command-converting element for adjusting the tension;

the sensor element includes: a color code probe arranged at the edge of the substrate advancing path; a rotary encoder mounted on the shaft of the motor; a linear displacement sensor mounted on the tension cylinder; and an angular displacement sensor arranged on the swing arm shaft of the swing roller;

10. A readable storage medium comprising a stored computer program, wherein when the computer program is executed, the readable storage medium is controlled to execute a method for controlling the image-text length of a substrate in a composite process according to any one of claims 1 to 7.