Roll-to-roll tension control method and apparatus

Abstract

The present application relates to a kind of roll-to-roll tension control method and device, it is applied to roll-to-roll processing system, in roll-to-roll processing system, material delivery counterweight is used to keep the preset tension of flexible material exported by material delivery roll by its gravity, material collection counterweight is used to keep the preset tension of flexible material recycled by material collection roll by its gravity.The method comprises: material delivery position sensor detects the position of material delivery counterweight;Obtain the material delivery counterweight deviation value between the position of material delivery counterweight and material delivery origin;Obtain the material collection counterweight deviation value between the position of material collection counterweight and material collection origin;According to material delivery counterweight deviation value, material collection counterweight deviation value, adjust the rotational speed of material delivery drive motor and material collection drive motor, to change the distance between material delivery counterweight and material delivery origin, and change the distance between material collection counterweight and material collection origin.The present application can be faster to adjust to preset tension.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of flexible material processing, in particular to a roll-to-roll tension control method and device. BACKGROUND

[0002] Roll-to-roll, also known as roll-to-roll processing technology, is a process that realizes efficient and stable processing of flexible materials through a continuous roll material transmission system. Common roll-to-roll processing technologies include continuous coating of battery pole pieces, roll-to-roll printing of conductive lines, etc.

[0003] In a roll-to-roll processing equipment / system, there are usually a feed roll and a take-up roll. The feed roll unwinds the flexible material to be processed, and the finished product after processing is taken up by the take-up roll. In the roll-to-roll processing technology, the tension of the flexible material is the most important factor affecting the processing quality.

[0004] In the prior art, the tension control method for flexible materials is usually to directly detect the tension of the flexible material by a tension detector. Since the materials of the flexible materials are different and the subsequent processing technologies are also different, the directly detected tension is not accurate, which leads to an unsatisfactory result of tension control in the roll-to-roll processing system, affects the quality of flexible material processing, and increases the cost. SUMMARY

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a roll-to-roll tension control method and device.

[0006] In a first aspect, the present application provides a roll-to-roll tension control method. The method is applied to a roll-to-roll processing system, and the roll-to-roll processing system includes a feed roll, a feed position sensor, a feed counterweight, a feed drive motor, a take-up roll, a take-up position sensor, a take-up counterweight, and a take-up drive motor. The feed drive motor is used to drive the feed roll to rotate to output a flexible material. The take-up drive motor is used to drive the take-up roll to rotate to recover the flexible material. The feed counterweight is used to maintain a preset tension of the flexible material output by the feed roll through its own gravity. The take-up counterweight is used to maintain a preset tension of the flexible material recovered by the take-up roll through its own gravity.

[0007] The method includes:

[0008] The feed position sensor detects the position of the feed counterweight.

[0009] An offset value of the feed counterweight between the position of the feed counterweight and a feed origin point is obtained.

[0010] An offset value of the take-up counterweight between the position of the take-up counterweight and a take-up origin point is obtained.

[0011] According to the feed material weight block deviation value and the receiving material weight block deviation value, the rotation speed of the feed material driving motor and the receiving material driving motor is adjusted to change the distance between the feed material weight block and the feed material origin and the distance between the receiving material weight block and the receiving material origin.

[0012] Optionally, if the feed material weight block deviation value is greater than or equal to a feed material maximum limit value or the receiving material weight block deviation value is greater than or equal to a receiving material maximum limit value, the adjusting the rotation speed of the feed material driving motor and the receiving material driving motor according to the feed material weight block deviation value and the receiving material weight block deviation value comprises:

[0013] The rotation speed of the feed material driving motor is set to zero and the rotation speed of the receiving material driving motor is greater than zero.

[0014] Optionally, if the feed material weight block deviation value is less than the feed material maximum limit value and the receiving material weight block deviation value is less than the receiving material maximum limit value, the adjusting the rotation speed of the feed material driving motor and the receiving material driving motor according to the feed material weight block deviation value and the receiving material weight block deviation value comprises:

[0015] The rotation speed of the feed material driving motor is kept unchanged and the rotation speed of the receiving material driving motor is increased; or

[0016] The rotation speed of the feed material driving motor is increased and the rotation speed of the receiving material driving motor is increased; or

[0017] The rotation speed of the feed material driving motor is decreased and the rotation speed of the receiving material driving motor is increased; or

[0018] The rotation speed of the feed material driving motor is decreased and the rotation speed of the receiving material driving motor is kept unchanged.

[0019] Optionally, if the feed material weight block deviation value is less than the feed material maximum limit value and the receiving material weight block deviation value is less than the receiving material maximum limit value, the adjusting the rotation speed of the feed material driving motor according to the feed material weight block deviation value and the receiving material weight block deviation value comprises:

[0020] The initial rotation speed of the feed material driving motor is obtained;

[0021] According to the feed material weight block deviation value and the receiving material weight block deviation value, a feed material control coefficient and a receiving material control coefficient are obtained;

[0022] The product of the feed material control coefficient and the feed material weight block deviation value is obtained as a feed material adjustment value;

[0023] The product of the receiving material control coefficient and the receiving material weight block deviation value is obtained as a receiving material adjustment value;

[0024] obtaining a sum of an initial rotating speed of the material feeding driving motor, the material feeding adjustment value and the material collecting adjustment value as a material feeding target rotating speed of the material feeding driving motor.

[0025] Optionally, the method further comprises:

[0026] obtaining an initial rotating speed of the material collecting driving motor;

[0027] obtaining a sum of an initial rotating speed of the material collecting driving motor, the material feeding adjustment value and the material collecting adjustment value as a material collecting target rotating speed of the material collecting driving motor.

[0028] Optionally, the method further comprises:

[0029] if the material feeding target rotating speed is greater than or equal to a maximum processing speed, or the material collecting target rotating speed is greater than or equal to the maximum processing speed, then:

[0030] setting the material feeding target rotating speed to zero;

[0031] updating the material feeding control coefficient and the material collecting control coefficient;

[0032] obtaining a material collecting target rotating speed of the material collecting driving motor according to the initial rotating speed of the material collecting driving motor, the updated material collecting control coefficient and the updated material feeding control coefficient.

[0033] Optionally, the material collecting roll comprises a first material collecting roll and a second material collecting roll, the material collecting position sensor comprises a first material collecting position sensor and a second material collecting position sensor, the material collecting weight block comprises a first material collecting weight block and a second material collecting weight block, and the material collecting driving motor comprises a first material collecting driving motor and a second material collecting driving motor, wherein the flexible material output by the material feeding roll is divided into a first flexible material and a second flexible material and is respectively recycled by the first material collecting roll and the second material collecting roll, the first material collecting weight block is used for keeping the first flexible material recycled by the first material collecting roll at a preset tension by its own gravity, and the second material collecting weight block is used for keeping the second flexible material recycled by the second material collecting roll at a preset tension by its own gravity,

[0034] the adjusting the rotating speeds of the material feeding driving motor and the material collecting driving motor according to the material feeding weight block deviation value and the material collecting weight block deviation value comprises:

[0035] keeping the rotating speed of the first material collecting driving motor and the rotating speed of the second material collecting driving motor unchanged and adjusting the rotating speed of the material feeding driving motor.

[0036] Optionally, the adjusting the rotation speed of the material feeding driving motor and the material collecting driving motor according to the material feeding weight block deviation value and the material collecting weight block deviation value further comprises:

[0037] The rotation speed of the first material collecting driving motor is made same as the rotation speed of the second material collecting driving motor.

[0038] Optionally, after the changing the distance between the material feeding weight block and the material feeding origin and the distance between the material collecting weight block and the material collecting origin, the method further comprises:

[0039] When the distance between the material feeding weight block and the material feeding origin is less than a first preset distance, making the material feeding weight block swing with a small amplitude;

[0040] When the distance between the material collecting weight block and the material collecting origin is less than a second preset distance, making the material collecting weight block swing with a small amplitude.

[0041] In a second aspect, a roll-to-roll tension control device is provided, which is applied to a roll-to-roll processing system, and the roll-to-roll processing system comprises a material feeding roll, a material feeding position sensor, a material feeding weight block, a material feeding driving motor, a material collecting roll, a material collecting position sensor, a material collecting weight block and a material collecting driving motor, wherein the material feeding driving motor is used to drive the material feeding roll to rotate to output a flexible material, the material collecting driving motor is used to drive the material collecting roll to rotate to recycle the flexible material, the material feeding weight block is used to keep the flexible material output by the material feeding roll with a preset tension through its own gravity, and the material collecting weight block is used to keep the flexible material recycled by the material collecting roll with a preset tension through its own gravity,

[0042] The roll-to-roll tension control device comprises:

[0043] A control unit is configured to detect the position of the material feeding weight block through the material feeding position sensor.

[0044] The control unit is further configured to obtain a material feeding weight block deviation value between the position of the material feeding weight block and a material feeding origin.

[0045] The control unit is further configured to obtain a material collecting weight block deviation value between the position of the material collecting weight block and a material collecting origin.

[0046] The control unit is further configured to adjust the rotation speed of the material feeding driving motor and the material collecting driving motor according to the material feeding weight block deviation value and the material collecting weight block deviation value, so as to change the distance between the material feeding weight block and the material feeding origin and the distance between the material collecting weight block and the material collecting origin.

[0047] The application provides a roll-to-roll tension control method and device, the method comprising: a material feeding position sensor detecting a position of a material feeding counterweight; obtaining a material feeding counterweight deviation value between the position of the material feeding counterweight and a material feeding origin; obtaining a material collecting counterweight deviation value between the position of the material collecting counterweight and a material collecting origin; and adjusting the rotating speed of the material feeding driving motor and the material collecting driving motor according to the material feeding counterweight deviation value and the material collecting counterweight deviation value, so as to change the distance between the material feeding counterweight and the material feeding origin and the distance between the material collecting counterweight and the material collecting origin. In the embodiment of the application, the flexible material in the roll-to-roll processing system is kept at a preset tension by the counterweight, the tension of the flexible material in the system can be indirectly obtained by detecting the position of the counterweight, and the position of the counterweight is changed by adjusting the rotating speed of the motor to adjust the tension of the flexible material. The method of the embodiment of the application obtains the tension of the flexible material according to the position of the counterweight and controls the tension, and the method can easily realize tension control and has high precision because the position of the counterweight is convenient to detect and has high precision. In addition, the rotating speed of the material feeding driving motor and the material collecting driving motor is simultaneously adjusted, so that the tension can be quickly adjusted to the preset tension. BRIEF DESCRIPTION OF DRAWINGS

[0048] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the application or in the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings can also provide other drawings based on these drawings for those ordinarily skilled in the art without any creative effort.

[0050] Figure 1 Fig. 1 shows an application environment diagram of the roll-to-roll tension control method in the embodiment of the application;

[0051] Figure 2 Fig. 2 shows a flowchart of the roll-to-roll tension control method in the embodiment of the application. DETAILED DESCRIPTION

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Figure 1 This is a diagram illustrating the application environment of the roll-to-roll tension control method in one embodiment. Figure 1 The image shows a roll-to-roll tension processing system. (Refer to...) Figure 1 As shown, the roll-to-roll tension control method is applied to roll-to-roll processing systems.

[0054] like Figure 1 As shown, the roll-to-roll processing system includes: a feeding roll 110, a feeding position sensor 111, a feeding counterweight 112, a feeding drive motor 113, a take-up roll 120, a take-up position sensor 121, a take-up counterweight 122, and a take-up drive motor 123. The feeding drive motor 113 drives the feeding roll 110 to rotate to output flexible material, and the take-up drive motor 123 drives the take-up roll 120 to rotate to recycle the flexible material. The feeding counterweight 112 maintains a preset tension on the flexible material output by the feeding roll 110 using its own weight, and the take-up counterweight 122 maintains a preset tension on the flexible material recycled by the take-up roll 120 using its own weight.

[0055] In embodiments of the present invention, the feeding device may include a set of feeding subsystems, such as Figure 1 As shown, the subsystem includes a feeding roll 110, a set of feeding position sensors 111, a set of feeding counterweights 112, and a feeding drive motor 113. In other embodiments of the present invention, the feeding device may include two or more feeding subsystems, which will not be described in detail here.

[0056] In this embodiment of the invention, the receiving device may include a receiving subsystem, which includes a receiving roll 120, a set of receiving position sensors 121, a set of receiving counterweights 122, and a receiving drive motor 123. In other embodiments of the invention, the dispensing device may include two or more dispensing subsystems. Two receiving subsystems are as follows: Figure 1 As shown, the take-up roll 120 includes a first take-up roll 1201 and a second take-up roll 1202, and the take-up position sensor 121 includes a first take-up position sensor (…). Figure 1 (not shown in the image) and second receiving position sensor ( Figure 1As shown in Fig. 1, the material receiving counterweight 122 includes a first material receiving counterweight 1221 and a second material receiving counterweight 1222, and the material receiving driving motor 123 includes a first material receiving driving motor 1231 and a second material receiving driving motor 1232.

[0057] In an embodiment of the present application, a set of position sensors can include multiple sensors, such as Figure 1 As shown, the multiple position sensors are distributed around the counterweight, which facilitates accurate and timely acquisition of the position of the counterweight.

[0058] In an embodiment of the present application, a set of counterweights can be composed of multiple individual counterweight units, or can be a counterweight roller. The counterweight has a certain volume, and thus the position of the counterweight can be the position of the center of the counterweight, or the position of the upper edge of the counterweight, or the position of the lower edge of the counterweight, or other positions that are convenient for positioning according to requirements.

[0059] In an embodiment of the present application, the flexible material is output through a material feeding roll and is recycled through a material receiving roll. Between the output and the recycling, the flexible material is processed. The processing of the flexible material includes but is not limited to segmentation, coating, etching, circuit micro-processing, etc.

[0060] The counterweight is used to maintain a preset tension of the flexible material collected by the roll-to-roll processing system through its own gravity. The counterweight can need to be matched with a corresponding support when in use, i.e., the support props up the flexible material on both sides, and the counterweight is placed between the supports and on the upper surface of the flexible material. The counterweight will "straighten" the flexible material under its own gravity, so that the flexible material can always maintain a preset tension during processing. When the flexible material cannot be "straightened" due to some reasons, the counterweight will drop under the action of gravity, so that the flexible material is "straightened" again, so that the flexible material can maintain a preset tension.

[0061] In other embodiments of the present application, the relative position between the counterweight and the flexible material can also be other ways, for example, the counterweight is hung on the flexible material through other support rods, and the counterweight itself is located below the lower surface of the flexible material. Other various ways of the relative position between the counterweight and the flexible material are not described here.

[0062] The size and shape of the counterweight can be set according to requirements, which is not limited in the embodiments of the present application.

[0063] Figure 1In the shown embodiment, the material receiving device comprises two groups of material receiving subsystems, the material receiving roll comprises a first material receiving roll and a second material receiving roll, the material receiving position sensor comprises a first material receiving position sensor and a second material receiving position sensor, the material receiving counterweight comprises a first material receiving counterweight and a second material receiving counterweight, and the material receiving drive motor comprises a first material receiving drive motor and a second material receiving drive motor, wherein the flexible material output by the material feeding roll is divided into a first flexible material and a second flexible material, and the first flexible material and the second flexible material are respectively recycled by the first material receiving roll and the second material receiving roll, the first material receiving counterweight is used to maintain a preset tension of the first flexible material recycled by the first material receiving roll through its own gravity, and the second material receiving counterweight is used to maintain a preset tension of the second flexible material recycled by the second material receiving roll through its own gravity.

[0064] Figure 2 In the shown embodiment, a roll-to-roll tension control method is applied to a roll-to-roll processing system, and the method comprises:

[0065] In step 210, the material feeding position sensor detects the position of the material feeding counterweight.

[0066] In step 220, the material feeding counterweight deviation value between the position of the material feeding counterweight and the material feeding origin is obtained.

[0067] In step 230, the material receiving counterweight deviation value between the position of the material receiving counterweight and the material receiving origin is obtained.

[0068] In step 240, the rotational speed of the material feeding drive motor and the material receiving drive motor is adjusted according to the material feeding counterweight deviation value and the material receiving counterweight deviation value, so as to change the distance between the material feeding counterweight and the material feeding origin and the distance between the material receiving counterweight and the material receiving origin.

[0069] In the embodiment of the present application, the flexible material in the roll-to-roll processing system is maintained at a preset tension by the counterweight, the tension of the flexible material in the system can be indirectly known by detecting the position of the counterweight, and the position of the counterweight is changed by adjusting the rotational speed of the motor to adjust the tension of the flexible material. The method of the embodiment of the present application obtains the tension of the flexible material according to the position of the counterweight and controls the tension, and since the position of the counterweight is convenient to detect and has relatively high precision, the method of the embodiment of the present application can easily realize tension control and has relatively high precision. In addition, the rotational speed of the material feeding drive motor and the material receiving drive motor is simultaneously adjusted in the method of the embodiment of the present application, and the tension can be quickly adjusted to the preset tension.

[0070] In the embodiment of the present application, if the feeding counterweight deviation value is greater than or equal to the feeding maximum limit value, or the collecting counterweight deviation value is greater than or equal to the collecting maximum limit value, the adjusting the rotating speed of the feeding driving motor and the collecting driving motor according to the feeding counterweight deviation value and the collecting counterweight deviation value comprises:

[0071] setting the rotating speed of the feeding driving motor to zero and setting the rotating speed of the collecting driving motor to be greater than zero.

[0072] The feeding maximum limit value and the collecting maximum limit value are the maximum values set for system operation, if the difference between the counterweight and the corresponding origin exceeds the corresponding maximum limit value, the current processing or the next moment processing can not be performed, or the processing quality can be seriously affected, therefore, the rotating speed of the feeding driving motor is adjusted to zero, the rotating speed of the collecting driving motor is set to be greater than zero, the various flexible materials not wound up by the system are gradually reduced, and the tension of the flexible material is gradually increased, so that the speed of adjusting the tension is accelerated.

[0073] In the embodiment of the present application, if the feeding counterweight deviation value is less than the feeding maximum limit value, and the collecting counterweight deviation value is less than the collecting maximum limit value, the adjusting the rotating speed of the feeding driving motor and the collecting driving motor according to the feeding counterweight deviation value and the collecting counterweight deviation value comprises:

[0074] keeping the rotating speed of the feeding driving motor unchanged and increasing the rotating speed of the collecting driving motor; or

[0075] increasing the rotating speed of the feeding driving motor and increasing the rotating speed of the collecting driving motor; or

[0076] decreasing the rotating speed of the feeding driving motor and increasing the rotating speed of the collecting driving motor; or

[0077] decreasing the rotating speed of the feeding driving motor and keeping the rotating speed of the collecting driving motor unchanged.

[0078] In the embodiment of the present application, simultaneously adjusting the rotating speed of the feeding driving motor and the collecting driving motor can quickly adjust the tension to the preset tension.

[0079] In the embodiment of the present application, a specific method for calculating the rotating speed of the driving motor is further provided.

[0080] In the embodiment of the present application, if the feeding counterweight deviation value is less than the feeding maximum limit value, and the collecting counterweight deviation value is less than the collecting maximum limit value, the adjusting the rotating speed of the feeding driving motor according to the feeding counterweight deviation value and the collecting counterweight deviation value comprises:

[0081] obtaining an initial rotating speed of the material feeding driving motor;

[0082] obtaining a material feeding control coefficient and a material receiving control coefficient according to the material feeding weight block deviation value and the material receiving weight block deviation value;

[0083] obtaining a product of the material feeding control coefficient and the material feeding weight block deviation value as a material feeding adjustment value;

[0084] obtaining a product of the material receiving control coefficient and the material receiving weight block deviation value as a material receiving adjustment value;

[0085] obtaining a sum of the initial rotating speed of the material feeding driving motor, the material feeding adjustment value and the material receiving adjustment value as a material feeding target rotating speed of the material feeding driving motor.

[0086] In the embodiment, adjusting the rotating speed of the material receiving driving motor according to the material feeding weight block deviation value and the material receiving weight block deviation value comprises:

[0087] obtaining an initial rotating speed of the material receiving driving motor;

[0088] obtaining a sum of the initial rotating speed of the material receiving driving motor, the material feeding adjustment value and the material receiving adjustment value as a material receiving target rotating speed of the material receiving driving motor.

[0089] Specifically, the material feeding target rotating speed and the material receiving target rotating speed can be calculated by the following formula:

[0090]

[0091]

[0092]

[0093]

[0094] wherein, the material feeding target rotating speed, the initial rotating speed of the material feeding driving motor, the material feeding control coefficient, the material feeding weight block deviation value, the material receiving control coefficient, the material receiving weight block deviation value, the material receiving target rotating speed, the initial rotating speed of the material receiving driving motor, the material feeding origin, the material receiving origin.

[0095] In the embodiment of the present application, the feeding control coefficient and the collecting control coefficient can be preset, or can be obtained through experiments, or can be parameters obtained by superimposing initial values and self-adaptive adjustment during the processing.

[0096] The two coefficients are related to the flexible material to be processed, the material of the processed flexible material itself, the processing technology, and also related to the weight and size of the counterweight, and also related to the working parameters, adjustment sensitivity, and minimum adjustment amount of the feeding driving motor and the collecting driving motor.

[0097] According to the above method, the feeding target speed and the collecting target speed can be obtained. In the embodiment of the present application, there can be multiple sampling time points, the feeding target speed and the collecting target speed of the current sampling time point can be calculated through the last sampling time point, and the feeding target speed and the collecting target speed of the next sampling time point can be calculated through the current sampling time point.

[0098] The difference between the current speed and the target speed of the next time point can be used as the driving motor adjustment amount.

[0099] In other embodiments of the present application, considering the adjustment ability and adjustment response speed of the driving motor, the feeding control coefficient and the collecting control coefficient need to be set so that the driving motor adjustment amount is greater than the minimum adjustment amount of the motor, and the driving motor adjustment amount will not be greater than the maximum adjustment amount of the motor per unit time. In addition, during the adjustment process, the change of the continuous multiple motor adjustment amounts should not be too large, and the change should be in one direction within a time period, for example, two groups of results, the first group is 0.2, 0.3, 0.5, 0.6, 0.5, 0.4, and the other group is 0.2, 0.6, 0.2, -0.2. In the above results, the first group adjustment is better than the second group adjustment.

[0100] In simple terms, it is to gradually increase or gradually decrease the speed of the driving motor, rather than suddenly increase or suddenly decrease, and also not to increase the speed immediately after decreasing the speed within a period of time.

[0101] Gradually increasing or gradually decreasing the speed of the driving motor is beneficial to increase the stability of the tension control and increase the service life of the driving motor.

[0102] In the embodiment of the present application, the method further comprises:

[0103] If the feeding target speed is greater than or equal to the maximum processing speed, or the collecting target speed is greater than or equal to the maximum processing speed, then:

[0104] The feeding target speed is set to zero;

[0105] The feeding control coefficient and the collecting control coefficient are updated;

[0106] According to the initial rotating speed of the material receiving driving motor, the updated material receiving control coefficient and the updated material sending control coefficient, a material receiving target rotating speed of the material receiving driving motor is obtained.

[0107] In the roll-to-roll processing system, the core process is to process the flexible material in the system, and the processing of the flexible material needs a certain length of time, and different processing processes may need different lengths of time. After the flexible material is processed, it may need a certain waiting time, such as hardening, cooling, etc. before being collected and rolled back. Therefore, in the roll-to-roll processing system, the material sending target rotating speed and the material receiving target rotating speed are limited to be less than the maximum processing speed. If the calculated material sending target rotating speed and the material receiving target rotating speed are greater than or equal to the maximum processing speed, the material sending target rotating speed in the present application will be zero, which can reduce the influence on the processing process and reduce the influence on the processing quality.

[0108] In the embodiment of the present application, as shown in Figure 1 the material receiving roll 120 includes a first material receiving roll 1201 and a second material receiving roll 1202, the material receiving position sensor 121 includes a first material receiving position sensor (not shown in Figure 1 ) and a second material receiving position sensor (not shown in Figure 1 ), the material receiving counterweight 122 includes a first material receiving counterweight 1221 and a second material receiving counterweight 1222, and the material receiving driving motor 123 includes a first material receiving driving motor 1231 and a second material receiving driving motor 1232, wherein the flexible material output by the material sending roll is divided into first flexible material and second flexible material, and is respectively collected by the first material receiving roll 1201 and the second material receiving roll 1202, the first material receiving counterweight 1221 is used to keep the first flexible material collected by the first material receiving roll 1201 at a preset tension by its own gravity, and the second material receiving counterweight 1222 is used to keep the second flexible material collected by the second material receiving roll 1202 at a preset tension by its own gravity,

[0109] adjusting the rotating speeds of the material receiving driving motor 123 and the material sending driving motor 113 according to the material sending counterweight deviation value and the material receiving counterweight 122 deviation value, includes:

[0110] keeping the rotating speeds of the first material receiving driving motor 1231 and the second material receiving driving motor 1232 unchanged, and adjusting the rotating speed of the material sending driving motor 113.

[0111] In the embodiment of the present application, adjusting the rotating speeds of the material receiving driving motor 123 and the material sending driving motor 113 according to the material sending counterweight deviation value and the material receiving counterweight 122 deviation value, further includes:

[0112] The rotation speed of the first material receiving driving motor 1231 and the rotation speed of the second material receiving driving motor 1232 are made the same.

[0113] In the embodiment of the present application, two or more material receiving rolls can be included, and the following embodiment is described by taking two material receiving rolls as an example, and the following description is also applicable to the embodiment of more material receiving rolls.

[0114] The flexible material in the roll-to-process system is divided into two parts before processing, and the two parts are processed in the same or different ways, and then are respectively collected by two material receiving rolls; the flexible material can also be divided into two parts after processing, and then are respectively collected by two material receiving rolls.

[0115] The flexible material output from the material sending roll is divided into two parts, so that the rotation speeds of the two material receiving rolls are usually the same, and the control of the system is relatively simple.

[0116] In other embodiments of the present application, if the two parts of the flexible material are processed in different ways, the two parts of the flexible material after division are not the same, and the rotation speeds of the two material receiving driving motors can also be different.

[0117] In the embodiment of the present application, when there are two or more material receiving driving motors and one material sending driving motor, the rotation speed of the material sending driving motor is preferentially adjusted, so that the control of the system is relatively simple. In addition, due to the error of the driving motor itself or the error between different driving motors, preferentially adjusting the rotation speed of one material sending driving motor instead of simultaneously adjusting the rotation speeds of two material receiving driving motors is beneficial to reduce the error.

[0118] In the embodiment of the present application, after the distance between the material sending counterweight and the material sending origin is changed and the distance between the material receiving counterweight and the material receiving origin is changed, the method further comprises:

[0119] When the distance between the material sending counterweight and the material sending origin is less than a first preset distance, the material sending counterweight is slightly deflected.

[0120] When the distance between the material receiving counterweight and the material receiving origin is less than a second preset distance, the material receiving counterweight is slightly deflected.

[0121] Slightly deflecting the counterweight is beneficial to tighten the flexible material and make the tension of the flexible material reach the preset tension faster.

[0122] Reference Figure 1As shown, the application also provides a roll-to-roll tension control device applied to a roll-to-roll processing system, the roll-to-roll processing system comprising: a material feeding roll, a material feeding position sensor 111, a material feeding counterweight, a material feeding drive motor 113, a material collecting roll 120, a material collecting position sensor 121, a material collecting counterweight 122 and a material collecting drive motor 123, wherein the material feeding drive motor 113 is used to drive the material feeding roll to rotate to output flexible material, the material collecting drive motor 123 is used to drive the material collecting roll 120 to rotate to recycle the flexible material, the material feeding counterweight is used to keep the flexible material output by the material feeding roll at a preset tension through its own gravity, and the material collecting counterweight 122 is used to keep the flexible material recycled by the material collecting roll 120 at a preset tension through its own gravity,

[0123] The roll-to-roll tension control device comprises:

[0124] A control unit is configured to detect the position of the material feeding counterweight through the material feeding position sensor 111.

[0125] The control unit is further configured to obtain a material feeding counterweight deviation value between the position of the material feeding counterweight and a material feeding origin.

[0126] The control unit is further configured to obtain a material collecting counterweight 122 deviation value between the position of the material collecting counterweight 122 and a material collecting origin.

[0127] The control unit is further configured to adjust the rotation speed of the material feeding drive motor 113 and the material collecting drive motor 123 according to the material feeding counterweight deviation value and the material collecting counterweight 122 deviation value, so as to change the distance between the material feeding counterweight and the material feeding origin and change the distance between the material collecting counterweight 122 and the material collecting origin.

[0128] In the embodiment of the application, if the material feeding counterweight deviation value is greater than or equal to a material feeding maximum limit value, or the material collecting counterweight 122 deviation value is greater than or equal to a material collecting maximum limit value, the control unit is further configured to:

[0129] Set the rotation speed of the material feeding drive motor 113 to zero and set the rotation speed of the material collecting drive motor 123 to be greater than zero.

[0130] In the embodiment of the application, if the material feeding counterweight deviation value is less than the material feeding maximum limit value and the material collecting counterweight 122 deviation value is less than the material collecting maximum limit value, the control unit is further configured to:

[0131] Keep the rotation speed of the material feeding drive motor 113 unchanged and increase the rotation speed of the material collecting drive motor 123; or

[0132] Increase the rotation speed of the material feeding driving motor 113, and increase the rotation speed of the material collecting driving motor 123; or

[0133] Decrease the rotation speed of the material feeding driving motor 113, and increase the rotation speed of the material collecting driving motor 123; or

[0134] Decrease the rotation speed of the material feeding driving motor 113, and keep the rotation speed of the material collecting driving motor 123 unchanged.

[0135] In the embodiment of the present application, if the material feeding counterweight deviation value is less than the material feeding maximum limit value, and the material collecting counterweight 122 deviation value is less than the material collecting maximum limit value, the control unit is further used for:

[0136] Obtaining the initial rotation speed of the material feeding driving motor 113;

[0137] According to the material feeding counterweight deviation value and the material collecting counterweight 122 deviation value, obtaining a material feeding control coefficient and a material collecting control coefficient;

[0138] Obtaining the product of the material feeding control coefficient and the material feeding counterweight deviation value as a material feeding adjustment value;

[0139] Obtaining the product of the material collecting control coefficient and the material collecting counterweight 122 deviation value as a material collecting adjustment value;

[0140] Obtaining the sum of the initial rotation speed of the material feeding driving motor, the material feeding adjustment value and the material collecting adjustment value as the material feeding target rotation speed of the material feeding driving motor 113.

[0141] In the embodiment of the present application, the control unit is further used for:

[0142] Obtaining the initial rotation speed of the material collecting driving motor 123;

[0143] Obtaining the sum of the initial rotation speed of the material collecting driving motor, the material feeding adjustment value and the material collecting adjustment value as the material collecting target rotation speed of the material collecting driving motor 123.

[0144] In the embodiment of the present application, if the material feeding target rotation speed is greater than or equal to the maximum processing speed, or the material collecting target rotation speed is greater than or equal to the maximum processing speed, the control unit is further used for:

[0145] Setting the material feeding target rotation speed to zero;

[0146] Updating the material feeding control coefficient and the material collecting control coefficient;

[0147] According to the initial rotation speed of the material collecting driving motor 123, the updated material collecting control coefficient and the updated material feeding control coefficient, obtaining the material collecting target rotation speed of the material collecting driving motor 123.

[0148] In the embodiment of the present application, the material receiving roll 120 comprises a first material receiving roll 1201 and a second material receiving roll 1202, the material receiving position sensor 121 comprises a first material receiving position sensor (not shown in the figure) and a second material receiving position sensor (not shown in the figure), the material receiving weight 122 comprises a first material receiving weight 1221 and a second material receiving weight 1222, and the material receiving drive motor 123 comprises a first material receiving drive motor 1231 and a second material receiving drive motor 1232, wherein the flexible material output by the material feeding roll is divided into a first flexible material and a second flexible material, and the first flexible material and the second flexible material are respectively recovered by the first material receiving roll 1201 and the second material receiving roll 1202, the first material receiving weight 1221 is used to keep the first flexible material recovered by the first material receiving roll 1201 at a preset tension by its own gravity, and the second material receiving weight 1222 is used to keep the second flexible material recovered by the second material receiving roll 1202 at a preset tension by its own gravity. Figure 1 Figure 1 In the embodiment of the present application, the control unit is further configured to:

[0149] The control unit is further configured to:

[0150] The control unit is further configured to:

[0151] In the embodiment of the present application, the control unit is further configured to:

[0152] The control unit is further configured to:

[0153] In the embodiment of the present application, after the distance between the material feeding weight and the material feeding origin is changed, and the distance between the material receiving weight 122 and the material receiving origin is changed,

[0154] The control unit is further configured to:

[0155] When the distance between the material feeding weight and the material feeding origin is less than a first preset distance, the material feeding weight is slightly deflected.

[0156] When the distance between the material receiving weight 122 and the material receiving origin is less than a second preset distance, the material receiving weight 122 is slightly deflected.

[0157] In the embodiment of the present application, the tension can be adjusted to the preset tension more quickly.

[0158] Figure 2 The figure is a flowchart of the method for controlling the tension of the roll-to-roll in one embodiment. It should be understood that, although Figure 2 ​The steps in the flowcharts of the above-described embodiments are shown in sequence according to the arrows, but the steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, the steps are not necessarily limited in sequence, and the steps can be executed in other sequences. Moreover, Figure 2 At least some of the steps in the flowcharts of the above-described embodiments can include a plurality of sub-steps or a plurality of stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of the sub-steps or stages is not necessarily sequential, but can be executed in rotation or alternation with other steps or at least some of the sub-steps or stages of other steps.

[0159] A person of ordinary skill in the art can understand that all or part of the processes in the above-described embodiments can be completed by a computer program instructing related hardware. The program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-described embodiments. Any reference to memory, storage, database, or other medium used in the embodiments provided by the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct RAM bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM).

[0160] It has to be noted that, in the present document, relational terms are intended only to convey a possible relationship between elements or

[0161] The foregoing is considered as illustrative only of the principles of the application. Numerous modifications and changes will readily occur to those skilled in the art, which modifications and changes are to be understood as intended to be encompassed by the general scope of the application. Accordingly, the application is not to be limited to the above described or illustrated embodiments, but is intended to encompass all embodiments consistent with the principles of the application.

Claims

1. A roll-to-roll tension control method, characterized by, The method is applied to a roll-to-roll processing system, and the roll-to-roll processing system comprises a feed roll, a feed position sensor, a feed counterweight, a feed drive motor, a take-up roll, a take-up position sensor, a take-up counterweight and a take-up drive motor, wherein the feed drive motor is used to drive the feed roll to rotate to output a flexible material, the take-up drive motor is used to drive the take-up roll to rotate to recycle the flexible material, the feed counterweight is used to keep the flexible material output by the feed roll at a preset tension through its own gravity, and the take-up counterweight is used to keep the flexible material recycled by the take-up roll at a preset tension through its own gravity, The method comprises: The feed position sensor detects the position of the feed counterweight; An offset value of the feed counterweight between the position of the feed counterweight and a feed origin point is obtained; An offset value of the take-up counterweight between the position of the take-up counterweight and a take-up origin point is obtained; According to the offset value of the feed counterweight and the offset value of the take-up counterweight, the rotational speed of the feed drive motor and the take-up drive motor is adjusted to change the distance between the feed counterweight and the feed origin point and the distance between the take-up counterweight and the take-up origin point; The take-up roll comprises a first take-up roll and a second take-up roll, the take-up position sensor comprises a first take-up position sensor and a second take-up position sensor, the take-up counterweight comprises a first take-up counterweight and a second take-up counterweight, and the take-up drive motor comprises a first take-up drive motor and a second take-up drive motor, wherein the flexible material output by the feed roll is divided into a first flexible material and a second flexible material and is recycled by the first take-up roll and the second take-up roll respectively, the first take-up counterweight is used to keep the first flexible material recycled by the first take-up roll at a preset tension through its own gravity, and the second take-up counterweight is used to keep the second flexible material recycled by the second take-up roll at a preset tension through its own gravity, According to the offset value of the feed counterweight and the offset value of the take-up counterweight, the rotational speed of the feed drive motor and the take-up drive motor is adjusted to change the distance between the feed counterweight and the feed origin point and the distance between the take-up counterweight and the take-up origin point; The rotational speed of the first take-up drive motor and the rotational speed of the second take-up drive motor are kept unchanged, and the rotational speed of the feed drive motor is adjusted.

2. The method of claim 1, wherein, If the offset value of the feed counterweight is greater than or equal to a maximum feed limiting value or the offset value of the take-up counterweight is greater than or equal to a maximum take-up limiting value, then according to the offset value of the feed counterweight and the offset value of the take-up counterweight, the rotational speed of the feed drive motor and the take-up drive motor is adjusted to: The rotational speed of the feed drive motor is zero, and the rotational speed of the take-up drive motor is greater than zero.

3. The method of claim 2, wherein, If the offset value of the feed counterweight is less than the maximum feed limiting value and the offset value of the take-up counterweight is less than the maximum take-up limiting value, then according to the offset value of the feed counterweight and the offset value of the take-up counterweight, the rotational speed of the feed drive motor and the take-up drive motor is adjusted to: The rotational speed of the feed drive motor is kept unchanged, and the rotational speed of the take-up drive motor is increased; or increasing the rotation speed of the material feeding driving motor and increasing the rotation speed of the material collecting driving motor; or decreasing the rotation speed of the material feeding driving motor and increasing the rotation speed of the material collecting driving motor; or decreasing the rotation speed of the material feeding driving motor and keeping the rotation speed of the material collecting driving motor unchanged.

4. The method of claim 2, wherein, If the material feeding counterweight deviation value is less than the material feeding maximum limit value and the material collecting counterweight deviation value is less than the material collecting maximum limit value, adjusting the rotation speed of the material feeding driving motor according to the material feeding counterweight deviation value and the material collecting counterweight deviation value comprises: obtaining an initial rotation speed of the material feeding driving motor; obtaining a material feeding control coefficient and a material collecting control coefficient according to the material feeding counterweight deviation value and the material collecting counterweight deviation value; obtaining a product of the material feeding control coefficient and the material feeding counterweight deviation value as a material feeding adjustment value; obtaining a product of the material collecting control coefficient and the material collecting counterweight deviation value as a material collecting adjustment value; obtaining a sum of the initial rotation speed of the material feeding driving motor, the material feeding adjustment value and the material collecting adjustment value as a material feeding target rotation speed of the material feeding driving motor.

5. The method of claim 4, wherein, adjusting the rotation speed of the material collecting driving motor according to the material feeding counterweight deviation value and the material collecting counterweight deviation value comprises: obtaining an initial rotation speed of the material collecting driving motor; obtaining a sum of the initial rotation speed of the material collecting driving motor, the material feeding adjustment value and the material collecting adjustment value as a material collecting target rotation speed of the material collecting driving motor.

6. The method of claim 5, wherein, The method further comprises: If the material feeding target rotation speed is greater than or equal to a maximum processing speed or the material collecting target rotation speed is greater than or equal to the maximum processing speed, then: setting the material feeding target rotation speed to zero; updating the material feeding control coefficient and the material collecting control coefficient; obtaining a material collecting target rotation speed of the material collecting driving motor according to the initial rotation speed of the material collecting driving motor, the updated material collecting control coefficient and the updated material feeding control coefficient.

7. The method of claim 6, wherein, The adjusting the rotation speed of the material feeding driving motor and the material collecting driving motor according to the material feeding counterweight deviation value and the material collecting counterweight deviation value further comprises: setting the rotation speed of the first material collecting driving motor to be the same as the rotation speed of the second material collecting driving motor.

8. The method of claim 1, wherein, After the distance between the material feeding counterweight and the material feeding origin is changed and the distance between the material collecting counterweight and the material collecting origin is changed, the method further comprises: when the distance between the material feeding counterweight and the material feeding origin is less than a first preset distance, causing the material feeding counterweight to swing slightly; when the distance between the material collecting counterweight and the material collecting origin is less than a second preset distance, causing the material collecting counterweight to swing slightly.

9. A roll-to-roll tension control device, characterized by, The method as claimed in any one of claims 1 to 8 is applied to a roll-to-roll tension control device applied to a roll-to-roll processing system, the roll-to-roll processing system comprising: a feed roll, a feed position sensor, a feed counterweight, a feed drive motor, a take-up roll, a take-up position sensor, a take-up counterweight, and a take-up drive motor, wherein the feed drive motor is configured to drive the feed roll to rotate to output a flexible material, the take-up drive motor is configured to drive the take-up roll to rotate to recover the flexible material, the feed counterweight is configured to maintain a preset tension of the flexible material output by the feed roll by its own gravity, and the take-up counterweight is configured to maintain a preset tension of the flexible material recovered by the take-up roll by its own gravity, The roll-to-roll tension control device comprises: a control unit configured to detect a position of the feed counterweight via the feed position sensor; the control unit is further configured to obtain a feed counterweight deviation value between the position of the feed counterweight and a feed origin point; the control unit is further configured to obtain a take-up counterweight deviation value between the position of the take-up counterweight and a take-up origin point; the control unit is further configured to adjust a rotation speed of the feed drive motor and the take-up drive motor according to the feed counterweight deviation value and the take-up counterweight deviation value, so as to change a distance between the feed counterweight and the feed origin point, and change a distance between the take-up counterweight and the take-up origin point.

Images