Wrinkle removal system

Abstract

To provide a wrinkle removal system for suppressing wrinkles when winding a film.SOLUTION: A wrinkle removal system comprises: a roll by which a film is wound; a pressing part which presses the film wound around the roll in a radial direction of the roll; an adjustment part which adjusts a pressing state at the pressing part with respect to the roll; an imaging device which acquires an imaging image by imaging a surface of the wound film; an image processing part which outputs information about wrinkles by detecting the wrinkles on the surface of the film based on the imaging image; and an output part which outputs information about a pressing condition based on the information about the wrinkles. The adjustment part adjusts the pressing condition based on the information about the pressing condition output by the output part.SELECTED DRAWING: Figure 1A

Description

[Technical field]

[0001] The present invention relates to a system for detecting and removing wrinkles in a film-like object wound on a roll. [Background technology]

[0002] In the film manufacturing process, the film is transported by roll-to-roll or other methods, and various processes are performed during the transport process. During the roll-to-roll process, wrinkles may occur, and the occurrence of wrinkles may lead to a decrease in product quality.

[0003] For example, Patent Document 1 discloses a web transport device that detects signs of wrinkles that may occur during film transport and prevents the occurrence of wrinkles by comprising a means for recognizing conditions that are signs of wrinkles on a film from images captured by an imaging means, and an axis angle control means for controlling an alignment adjustment means to prevent wrinkles from occurring. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] WO2009 / 066399 Summary of the Invention [Problem to be solved by the invention]

[0005] However, wrinkles do not only occur during film transport, but also when the film is wound up. Wrinkles that occur during winding are incorporated directly into the winding roll, causing the film to bend inside the roll, resulting in a decrease in product quality.

[0006] The present invention has been made in consideration of the above problems, and has an object to provide a wrinkle removal system that suppresses wrinkles when a film is wound up. [Means for solving the problem]

[0007] That is, the present invention is as follows. [1] A roll for winding the film; a pressing section that presses the film wound around the roll in a radial direction of the roll; an adjustment unit that adjusts a pressing state of the pressing unit against the roll; an imaging device that captures an image of the surface of the film being wound up, and obtains a captured image; an image processing unit that detects wrinkles on the surface of the film based on the captured image and outputs information about the wrinkles; an output unit that outputs information regarding a pressing condition based on the information regarding the wrinkles, The adjustment unit adjusts the pressing state based on the information on the pressing condition output by the output unit. Wrinkle removal system. [2] Further comprising an illumination unit that irradiates light onto the surface to be imaged. The wrinkle removal system described in [1]. [3] The image processing unit detects the wrinkles by performing edge detection processing on the captured image in an axial direction of the roll. A wrinkle removal system according to [1] or [2]. [4] The image processing unit performs edge detection processing on the captured image in an axial direction of the roll, calculates an edge integrated value by integrating pixels in which edges are detected in a circumferential direction of the roll, and detects the wrinkles based on the edge integrated value. The wrinkle removal system according to any one of [1] to [3]. [5] The image processing unit detects the wrinkles when the edge integrated value is equal to or greater than a predetermined threshold value. The wrinkle removal system according to [4]. [6] The image processing unit detects the wrinkles when the edge integrated value is equal to or smaller than a predetermined threshold value. The wrinkle removal system according to [4]. [7] The information on the pressing condition includes information for instructing the adjustment unit to reduce the pressing force of the pressing unit, maintain a low pressing force state for a predetermined time, and then increase the pressing force of the pressing unit. The wrinkle removal system according to any one of [1] to [6]. [8] The information on the pressing condition includes information on the pressing force after the reduction, a reduction rate of the pressing force, a maintenance time of the low pressing force state, an increase rate of the pressing force, and the pressing force after the increase. The wrinkle removal system according to [7]. [9] a surface of the film pressed by the pressing portion is located inside the roll of the film relative to the surface of the film imaged by the imaging device; The wrinkle removal system according to any one of [1] to [8].

[10] The roll has a first roll and a second roll for separating the two-layer film and winding each layer, the imaging device images the first roll and the second roll within the same field of view, the captured image includes a first surface of the film wound around the first roll and a second surface of the film wound around the second roll; The wrinkle removal system according to any one of [1] to [9].

[11] the image processing unit performs edge detection processing on the captured image in an axial direction of the roll, calculates an edge integrated value by integrating pixels in which edges are detected in a circumferential direction of the roll, and detects the wrinkles on the first surface and the second surface based on the edge integrated value. The wrinkle removal system according to

[10] .

[12] the image processing unit has different thresholds for the edge integrated value when detecting the wrinkles between the first surface and the second surface, The wrinkle removal system according to

[11] .

[13] The roll has a first roll and a second roll for separating the two-layer film and winding each layer, The imaging device includes a first imaging device that images a first surface of the film wound around the first roll, and a second imaging device that images a second surface of the film wound around the second roll. The wrinkle removal system according to any one of [1] to

[12] . Effect of the Invention

[0008] According to the present invention, it is possible to provide a wrinkle removal system that suppresses wrinkles occurring when a film is wound up. [Brief description of the drawings]

[0009] [Figure 1A] 1 is a schematic cross-sectional view of a wrinkle removal system according to an embodiment of the present invention. [Figure 1B] 1B is a schematic top view of the wrinkle removal system shown in FIG. 1A. FIG. [Figure 1C] 1 is a graph showing an example of a pressing state by a pressing portion as a change in pressing force (pressure control signal) over time. [Figure 1D] 1 shows an image captured by an imaging device and a processed image obtained by performing edge processing on the captured image. [Figure 1E] FIG. 2 is a diagram illustrating an example of a schematic configuration diagram of a control device. [Figure 1F] FIG. 2 is a diagram showing an example of a schematic configuration of imaging data. [Figure 1G] 4 is a flowchart showing an operation process of the wrinkle removal system of the present embodiment. [Figure 1H] 13 is a diagram showing the correspondence relationship between pressing conditions and integrated values ​​of edges. FIG. [Diagram 2] 1 is a schematic cross-sectional view of a wrinkle removal system according to an embodiment of the present invention. [Diagram 3] 1 is a schematic cross-sectional view of a wrinkle removal system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention (hereinafter referred to as "the present embodiment") will be described in detail with reference to the drawings as necessary, but the present invention is not limited to this, and various modifications are possible without departing from the gist of the present invention. In the drawings, the same elements are given the same reference numerals, and duplicated explanations will be omitted. Furthermore, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings, unless otherwise specified. Furthermore, the dimensional ratios of the drawings are not limited to those shown in the drawings.

[0011] In the present embodiment, the term "film" is not intended to be limited, but is used as a concept including what is generally called a sheet or web. Examples of such films include, but are not limited to, single-layer or multi-layer resin films, metal films, continuous paper, fabrics, and other flexible continuous materials.

[0012] 1. Wrinkle Removal System A schematic cross-sectional view of the wrinkle removal system of this embodiment is shown in Fig. 1. As shown in Fig. 1A, the wrinkle removal system 100 of this embodiment includes a roll 110 that winds up a film F, a pressing unit 120 that presses the film F wound around the roll 110 in the radial direction D1 of the roll 110, an adjustment unit 130 that adjusts the pressing state of the pressing unit 120 against the roll 110, an imaging device 140 that captures an image of the surface of the wound film F to obtain the captured image, an image processing unit 211 that detects wrinkles on the surface of the film F based on the captured image and outputs information about the wrinkles, and an output unit 212 that outputs information about the pressing conditions based on the information about the wrinkles, and the adjustment unit 130 adjusts the pressing state based on the information about the pressing conditions output by the output unit 212.

[0013] The wrinkle removal system 100 of the present embodiment removes wrinkles that occur when the film F is wound around the roll 110. The mechanism by which wrinkles occur when the film F is wound around the roll 110 is not particularly limited, but for example, air may be trapped between the film F at a portion S where the surface of the wound film F contacts the surface of the film F to be wound, causing the trapped air to have nowhere to escape and resulting in wrinkles, or the escape route for the trapped air may cause wrinkles.

[0014] In wrinkle removal system 100 of the present embodiment, wrinkles that occur in this way are detected based on a captured image of the surface of film F, and information about the pressing conditions is output based on the information about the wrinkles, which causes adjustment unit 130 to drive pressing unit 120. Pressing unit 120 is pressed against roll 110 in direction D1, and air can escape between the films F at this time, thereby removing the wrinkles.

[0015] Each component will be described below.

[0016] Roll 110 is a core roll around which film F is wound. The faster the rotation speed of roll 110, the faster the winding process can be performed, but air is more likely to be trapped and wrinkles are more likely to occur. In this regard, according to the present embodiment, winding can be performed at a higher speed while removing wrinkles. The rotation speed of roll 110 may be controlled by an actuator or the like (not shown), and the actuator may be controlled by control device 200.

[0017] There may be one roll 110, or multiple rolls 110 may be arranged in the direction of the rotation axis as shown in Fig. 1B, or multiple rolls 110 may be arranged in multiple stages in the vertical direction so that the rotation axes are parallel as shown in Fig. 2 and Fig. 3. Here, Fig. 1B is a schematic top view of the wrinkle removal system shown in Fig. 1A as viewed from above. When multiple rolls are arranged in the direction of the rotation axis as shown in Fig. 1B, for example, the film F may be cut in a direction parallel to the flow direction D2 in a process before being wound up, and the cut film F may be wound up on each roll 110.

[0018] The pressing section 120 presses the film F wound around the roll 110 in the radial direction D1 of the roll 110. As a result, air caught between the pieces of film F is pressed by the pressing section 120, flows in the width direction D4 of the film F, and can escape from the side ends of the film F. In particular, as shown in FIG. 1B, by making the width of the pressing section 120 wider than the width of one roll 110, air is prevented from flowing in the rotation direction D3 of the film F, and the air caught between the pieces of film F can be easily caused to flow in the width direction D4 of the film F.

[0019] Pressing unit 120 is not particularly limited, and may be, for example, a cylindrical roll, and may be configured to be rotatable in direction D5 corresponding to rotation direction D3 of roll 110. This can eliminate friction between pressing unit 120 and film F, which is wound while flowing in direction D3. This can eliminate the occurrence of wrinkles due to friction between pressing unit 120 and film F.

[0020] As shown in FIG. 1B, one pressing unit 120 may be provided for each of the rolls 110 arranged in the direction of the rotation axis, or one pressing unit 120 may be provided for each of the rolls 110 (not shown). When one pressing unit 120 is provided for each of the rolls 110, all of the rolls 110 are pressed by the pressing unit 120 even when some of the rolls 110 have wrinkles and other rolls do not. However, the device configuration is simplified. On the other hand, when one pressing unit 120 is provided for each of the rolls 110, the pressing can be controlled for each of the rolls 110, but the device configuration becomes complicated.

[0021] The surface of film F pressed by pressing unit 120 may be located inside the roll of film F relative to the surface of film F imaged by imaging device 140. Specifically, an image may be acquired by imaging device 140 upstream of film F in the winding direction D3, image processing unit 211 may execute a wrinkle detection process (described later) based on the acquired image, and output unit 212 may output the pressing conditions to adjustment unit 130 based on information about the detected wrinkles.

[0022] The adjustment unit 130 adjusts the pressing state of the pressing unit 120 against the roll 110. As described above, the air caught between the films F is pressed by the pressing unit 120, flows in the width direction D4 of the film F, and can escape from the side ends of the film F. However, once wrinkles are formed, reducing the pressing force by the pressing unit 120 allows air to enter the film and fill the area around the wrinkles, thereby eliminating the wrinkles. Therefore, the adjustment unit 130 adjusts the pressing state based on information about the pressing conditions output by the output unit 212 based on information about the wrinkles.

[0023] The configuration of the adjustment unit 130 is not limited as long as the pressing unit 120 can press the film F in the radial direction D1 of the roll 110. For example, the adjustment unit 130 may have an actuator that can operate the pressing unit 120 in the direction D1, and a sensor that measures the pressing force of the pressing unit 120. This allows the adjustment unit 130 to press the pressing unit 120 against the roll 110 with the actuator while measuring the pressing force with the sensor. For example, when the adjustment unit 130 acquires pressing conditions from the output unit 212, it uses the actuator and the sensor to control the pressing unit 120 and the roll 110 to be pressed against each other with a predetermined pressure according to the pressing conditions.

[0024] FIG. 1C shows a graph representing an example of the pressing state by the pressing unit 120 as a change in pressing force (pressure control signal) over time. In this embodiment, the "pressing condition" refers to a pressing instruction output by the output unit 212 to the adjustment unit 130, and the "pressing state" refers to a state in which the adjustment unit 130, which has received the pressing condition, presses the pressing unit 120 against the roll 110 using an actuator or a sensor. FIG. 1C shows an example of the pressing state, which is synonymous with the pressing condition (pressure control signal) output by the output unit 212 to the adjustment unit 130. The pressure control signal is a control signal for the pressing force of the pressing unit 120 by the adjustment unit 130, and the value of the signal is linked to the pressing force.

[0025] As shown in FIG. 1C, for example, the pressing state (pressing condition) may be such that, when wrinkles exceeding a predetermined threshold value are detected, the pressing force is gradually reduced, the reduced pressing force is maintained for a certain period of time, and then the pressing force is gradually increased. In the pressing state, the speed before and after pressurization may be different. By gradually reducing and pressurizing the pressure, it tends to be possible to suppress the occurrence of wrinkles due to the film F twisting at the portion where the pressing unit 120 contacts. In addition, by maintaining the pressing force for a certain period of time without changing it, air is released and wrinkles are easily eliminated. Furthermore, by gradually applying pressure, it tends to be possible to suppress the occurrence of wrinkles due to sudden pressure at the portion where the pressing unit 120 contacts.

[0026] The imaging device 140 captures an image of the surface of the film F being wound up, and obtains the captured image. There are no particular limitations on the imaging device 140, and any conventionally known imaging device can be used. The captured image may be a moving image or a still image.

[0027] The installation manner of the imaging device 140 is not particularly limited as long as there is no problem with the viewing angle, and as shown in Fig. 1B, one imaging device 140 may be provided for one roll 110, or one imaging device 140 may be provided for multiple rolls 110 arranged in the rotation axis direction. In addition, as shown in Fig. 2, when multiple rolls 110 are arranged in multiple stages in the vertical direction so that the rotation axes are parallel, the imaging devices 140 may be arranged so that multiple stages can be imaged by one imaging device 140, or as shown in Fig. 3, the imaging devices 140 may be arranged so that each stage can be imaged by one imaging device 140.

[0028] The wrinkle removal system 100 of the present embodiment may further include an illumination unit 150 that irradiates light onto the surface to be imaged. By including the illumination unit 150, an image can be obtained in which areas where light is strongly reflected by the illumination unit 150 are displayed in white, and areas where light is less reflected are displayed in black.

[0029] The top part of Fig. 1D shows an example of an image captured by the imaging device 140. In the image shown in the top part of Fig. 1D, the background is expressed in black, and the film F wound on the roll 110 is expressed with a metallic feel. By expressing the reflection of light by the illumination unit 150 in this way, it becomes easier to capture wrinkles. Where there are wrinkles, the degree of reflection changes locally, resulting in a drastic change in the degree of black and white. The image in which the change is subjected to edge detection using a differential filter is the processed image shown in the bottom part of Fig. 1D.

[0030] Wrinkle removal system 100 of the present embodiment includes image processing unit 211 that detects wrinkles on the surface of a film based on a captured image and outputs information about the wrinkles, and output unit 212 that outputs information about pressing conditions based on the information about the wrinkles. Image processing unit 211 and output unit 212 may be functional units included in control device 200. Control device 200 will be described in detail below.

[0031] 1E shows a schematic configuration diagram of the control device 200. The control device 200 may be a desktop, laptop, or other general-purpose computer. The control device 200 may be connected by wire or wirelessly to a transport mechanism including the roll 110, an adjustment unit 130, an image capture device 140, an illumination unit 150, and other mechanisms for transporting the film F and executing various processes.

[0032] As shown in FIG. 1E, the control device 200 includes, for example, a processor 210, a communication interface 220, an input / output interface 230, a memory 240, a storage 250, and one or more buses 260 for interconnecting these components.

[0033] The processor 210 may implement each process, function, or method disclosed in each embodiment using, for example and without limitation, one or more central processing units (CPUs), microprocessors (including MPUs, graphic processing units (GPUs), processor cores, multiprocessors, application specific integrated circuits (ASICs), application specific integrated circuits (FPGAs), etc., integrated circuit (IC) chips, LS) or dedicated circuitry.

[0034] The communication interface 220 transmits and receives various data to and from other devices via a network. The communication may be performed either wired or wirelessly, and any communication protocol may be used as long as the devices can communicate with each other. For example, the communication interface 220 is implemented as hardware such as a network adapter, various communication software, or a combination of these.

[0035] The input / output interface 230 includes an input device for inputting various operations and an output device for outputting processing results, etc. For example, the input / output interface 230 may include an information input device such as a keyboard, a mouse, and a touch panel, and an information output device such as a display device. Note that the control device 200 may receive a predetermined input or execute a predetermined output by connecting an external input / output interface 230. For example, the adjustment unit 130 may be an information output destination of the input / output interface 230, and the imaging device 140 may be an information input source of the input / output interface 230.

[0036] The memory 240 temporarily stores the programs loaded from the storage 250 and provides a working area for the processor 210. The memory 240 also temporarily stores various data generated while the processor 210 is executing the programs. The memory 240 may be, for example, a high-speed random access memory such as a DRAM, an SRAM, a DDR RAM, or another random access solid-state storage device, or may be a combination of these.

[0037] The storage 250 stores programs, each functional unit, and various data. The storage 250 may store, for example, imaging data 251. As shown in Fig. 1F, the imaging data 251 may be recorded in association with an image ID given to each imaging, the acquisition date and time of the image, information identifying the roll or location of the image, image data after processing, information regarding wrinkles obtained based on the image, and the like.

[0038] Storage 250 may also be, for example, one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or non-volatile memory such as other non-volatile solid-state storage devices, or a combination thereof. Another example of storage 250 may include one or more storage devices located remotely from processor 210.

[0039] The processor 210 executes processes, functions, or methods realized by codes or instructions included in a program stored in the storage 250. As shown in Fig. 1E, the processor 210 of this embodiment may function as an image processing unit 211 and an output unit 212. Each functional unit will be described below.

[0040] The image processing unit 211 detects wrinkles on the surface of the film F from the captured image acquired by the imaging device 140, and outputs information about the wrinkles. The method of detecting wrinkles is not particularly limited, but may be, for example, a known edge detection process for the captured image. For example, as shown in the upper part of FIG. 1D, by expressing the reflection of light, the degree of reflection changes locally in the area where wrinkles are present, resulting in a drastic change in the degree of black and white. By performing edge detection processing on the change using a differential filter, a processed image shown in the lower part of FIG. 1D is obtained. In the processed image, the areas shown in white are areas in the original image where the degree of black and white changes drastically, and are areas where wrinkles are likely to occur.

[0041] For example, the image processing unit 211 may detect wrinkles by performing edge detection processing on the captured image in the axial direction of the roll 110. More specifically, the image processing unit 211 may detect the detected edges as wrinkles by detecting boundaries by first or second derivatives of the luminance of pixels in the axial direction of the roll 110.

[0042] More specifically, the image processing unit 211 may perform edge detection processing on the captured image in the axial direction of the roll, and calculate an edge integration value by accumulating pixels in which edges are detected in the circumferential direction of the roll (direction perpendicular to the axial direction), and detect wrinkles based on the edge integration value.

[0043] The image processor 211 may further perform a process for eliminating noise from the detected edges to further identify wrinkles. For example, in the processed image shown in the lower part of Fig. 1D, both ends of the roll 110 are strongly detected as edges, although they are not wrinkles. Also, in the processed image shown in the lower part of Fig. 1D, some edges are detected as noise, but are not actually wrinkles.

[0044] As an example of noise removal processing, the image processing unit 211 first accumulates the number of pixels detected as an edge in a direction perpendicular to the axial direction (circumferential direction of the roll 110) for each axial position of the roll 110 in the processed image after edge detection processing. This results in the graph shown in the lower part of FIG. 1D. In the graph obtained in this way, the higher the accumulated value, the more likely it is that the detected edge is a wrinkle. Also, when the accumulated value is significantly high, it can be said that there is a high possibility that the edge of the roll 110 has been detected, rather than an edge.

[0045] Therefore, in order to prevent both ends of the roll 110 from being detected as wrinkles, the image processing unit 211 may detect wrinkles using a high-pass filter when the edge integrated value is equal to or less than a predetermined threshold value, and may not detect the wrinkles when the edge integrated value is equal to or more than the predetermined threshold value. Alternatively, when the positions of both ends of the roll 110 can be identified within the image, the image processing unit 211 may set those parts as regions where wrinkle detection processing is not performed.

[0046] In addition, in order to prevent noise that is not actually a wrinkle from being detected as an edge, image processing unit 211 may use a low-pass filter to detect wrinkles when an edge integrated value is equal to or greater than a predetermined threshold, and not detect a wrinkle when the edge integrated value is equal to or less than the predetermined threshold.

[0047] Image processing unit 211 can detect wrinkles by the above process. Based on the wrinkles detected in this way, image processing unit 211 may output information about the wrinkles. The information about the wrinkles is not particularly limited, and may include, for example, the number, position, size, etc. of wrinkles. As a method for obtaining the number, position, size, etc. of wrinkles, image processing unit 211 may, for example, identify the location of a peak of the integrated value of the edge detected as a wrinkle as the position of the wrinkle, may identify the number of wrinkles by counting the peaks of the integrated value of the edge detected as a wrinkle, or may evaluate the size of the wrinkles based on the integrated value of the edge detected as a wrinkle.

[0048] Output unit 212 outputs information about pressing conditions based on information about wrinkles. Information about pressing conditions is not particularly limited, but may include, for example, a decrease or increase in pressing force. More specifically, information about pressing conditions may include information instructing adjustment unit 130 to decrease the pressing force of pressing unit 120, maintain the low pressing force state for a predetermined time, and then increase the pressing force of pressing unit 120. Furthermore, information about pressing conditions may include information about the pressing force after the decrease, the rate at which the pressing force is decreased, the time for which the low pressing force state is maintained, the rate at which the pressing force is increased, and the pressing force after the increase.

[0049] By performing such an operation, air is taken into the film F by atmospheric pressure. The taken-in air fills the surrounding area of ​​the wrinkles, thereby removing the wrinkles. Furthermore, wrinkles tend to be more easily removed when the speed at which the pressure is reduced is faster than the speed at which the pressure is increased.

[0050] FIG. 1H shows the correspondence between the pressing conditions and the integrated value of the edge. In FIG. 1H, the pressing conditions are shown by pressure control signals. Here, the higher the pressure control signal, the higher the pressing force of the pressing unit 120 against the roll 110, and the lower the pressure control signal, the lower the pressing force. As shown in FIG. 1H, for example, when the image processing unit 211 detects that the integrated value of the edge exceeds a predetermined threshold, the output unit 212 outputs a predetermined pressure control signal to the adjustment unit 130. Then, the adjustment unit 130 reduces the pressing force of the pressing unit 120 in accordance with the pressure control signal, maintains the pressure for a certain period of time with the pressure reduced to a predetermined value, and then increases the pressing force. During this time, the wrinkles are eliminated and the integrated value of the edge is reduced. And, FIG. 1H shows a state in which, even after the pressing force is increased, no wrinkles are generated again, and the winding is performed normally, so that the integrated value of the edge is kept low.

[0051] The pressure conditions, such as the rate at which the pressure is reduced, the time for which the pressure is maintained, and the rate at which the pressure is increased, may or may not be determined in advance.

[0052] For example, when the integrated value of the edge exceeds a predetermined threshold, the output unit 212 may output a pressure control signal to reduce the pressure for a predetermined time (e.g., 8 seconds), and if the integrated value of the edge still exceeds the predetermined threshold after that time (8 seconds) has elapsed, the output unit 212 may again output a pressure control signal to reduce the pressure for a predetermined time (e.g., 8 seconds).

[0053] In addition, when the integrated value of the edge exceeds a predetermined threshold, the output unit 212 may output a pressure control signal to maintain the pressure at a reduced pressure, and when the integrated value of the edge detected by the image processing unit 211 falls below a predetermined value, the output unit 212 may output a pressure control signal to increase the pressure.

[0054] Next, the embodiment shown in FIG. 2 will be described. In FIG. 2, a first roll 111 and a second roll 112 are arranged in multiple stages in the vertical direction so that the rotation axes are parallel to each other, and a roll 110 is disclosed, which separates a two-layer film and winds each layer. Here, the imaging device 140 is arranged so that the first roll 111 and the second roll 112 can be imaged within the same field of view. The image thus obtained includes a first surface 301 of the film F wound around the first roll 111 and a second surface 302 of the film F wound around the second roll 112. As shown in FIG. 2, the first surface 301 and the second surface 302 are originally interlayer peeling surfaces of one laminated film F.

[0055] In FIG. 2, the image processing unit 211 performs edge detection processing on the captured image in the axial direction of the roll 110, and calculates an edge integration value by integrating pixels in which edges are detected in the circumferential direction of the roll 110, and detects wrinkles on the first surface 301 and the second surface 302 based on the edge integration value.

[0056] 2, the image processing unit 211 may set different thresholds for the edge integrated value when detecting wrinkles between the first surface 301 and the second surface 302. The distance between the first roll 111 and the image capturing device 140 and the distance between the second roll 112 and the image capturing device 140 are different, and this causes the amount of light from the illumination unit 150 that reaches each surface of the first roll 111 and the second roll 112 to change, and the amount of light that the image capturing device 140 receives from these surfaces also differs. Therefore, when a differential filter is applied, edges are more easily detected on the first surface 301 of the first roll 111. Therefore, by changing the thresholds for the edge integrated value when detecting wrinkles between the first surface 301 and the second surface 302, it is possible to make the evaluations of both surfaces comparable.

[0057] Next, the embodiment shown in FIG. 3 will be described. In FIG. 3, a first roll 111 and a second roll 112 are arranged in multiple stages in the vertical direction so that the rotation axes are parallel to each other, and a roll 110 is formed by separating a two-layer film and winding each layer. Here, the imaging device 140 has a first imaging device 141 that images the first roll 111 and a second imaging device 141 that images the second roll 112. The captured images thus obtained include a captured image of a first surface 301 of the film F wound around the first roll 111 and a captured image of a second surface 302 of the film F wound around the second roll 112. As shown in FIG. 3, the first surface 301 and the second surface 302 are originally interlayer peeling surfaces of one laminated film F.

[0058] 2. Operation processing Next, the operation process of the wrinkle removal system 100 of the present embodiment will be described with reference to Fig. 1G. Note that the process procedure described below is merely an example, and each process may be modified as much as possible within the scope of the technical concept of the present disclosure, and steps may be omitted, replaced, or added as appropriate.

[0059] In step S01, the control device 200 determines whether or not the film F is being wound based on information such as control of the roll 110 by the control device 200. If the winding of the film F has ended, the process ends with "NO." If the winding of the film F is continuing, the process proceeds to the next step S02 with "YES."

[0060] In step S02, the imaging device 140 captures an image of the front side of the film being wound, and transmits the image of the front side to the control device 200 via a wired or wireless network.

[0061] In step S03, image processor 211 of control device 200 acquires information about wrinkles based on the surface image. More specifically, image processor 211 executes edge detection processing and the above-mentioned accumulation processing on the surface image. Image processor 211 may then determine that there is a wrinkle at a location where the edge accumulation value falls within a predetermined range that does not satisfy the high-pass filter or low-pass filter.

[0062] In step S04, if wrinkles are detected, the process proceeds to the next step S05 with "YES", and if wrinkles are not detected, the process returns to step S01 with "NO" and the process is repeated from capturing an image.

[0063] In step S05, output unit 212 outputs pressing conditions based on the information about wrinkles, and passes them over to adjustment unit 130. Then, adjustment unit 130 drives the sensors and actuators so as to satisfy the pressing conditions, and brings pressing unit 120 and roll 110 into a pressed state. [Industrial Applicability]

[0064] INDUSTRIAL APPLICABILITY The present invention has industrial applicability as a film wrinkle removal system. [Explanation of symbols]

[0065] 100... wrinkle removal system, 110... roll, 111... first roll, 112... second roll, 120... pressing section, 130... adjustment section, 140... imaging device, 141... first imaging device, 150... lighting section, 200... control device, 210... processor, 211... image processing section, 212... output section, 220... communication interface, 230... input / output interface, 240... memory, 250... storage, 251... imaging data, 260... bus, 301... first surface, 302... second surface

Claims

1. A roll for winding the film; a pressing section that presses the film wound around the roll in a radial direction of the roll; an adjustment unit that adjusts a pressing state of the pressing unit against the roll; an imaging device that captures an image of the surface of the film being wound up, and obtains a captured image; an image processing unit that detects wrinkles on the surface of the film based on the captured image and outputs information about the wrinkles; an output unit that outputs information regarding a pressing condition based on the information regarding the wrinkles, The adjustment unit adjusts the pressing state based on the information on the pressing condition output by the output unit. Wrinkle removal system.

2. Further comprising an illumination unit that irradiates light onto the surface to be imaged. The wrinkle removal system of claim 1 .

3. The image processing unit detects the wrinkles by performing edge detection processing on the captured image in an axial direction of the roll. The wrinkle removal system of claim 1 .

4. The image processing unit performs edge detection processing on the captured image in an axial direction of the roll, calculates an edge integrated value by integrating pixels in which edges are detected in a circumferential direction of the roll, and detects the wrinkles based on the edge integrated value. The wrinkle removal system of claim 1 .

5. The image processing unit detects the wrinkles when the edge integrated value is equal to or greater than a predetermined threshold value. The wrinkle removal system according to claim 4 .

6. The image processing unit detects the wrinkles when the edge integrated value is equal to or smaller than a predetermined threshold value. The wrinkle removal system according to claim 4 .

7. the information on the pressing condition includes information for instructing the adjustment unit to reduce the pressing force of the pressing unit, maintain a low pressing force state for a predetermined time, and then increase the pressing force of the pressing unit; The wrinkle removal system of claim 1 .

8. The information on the pressing condition includes information on the pressing force after the reduction, a reduction rate of the pressing force, a maintenance time of the low pressing force state, an increase rate of the pressing force, and the pressing force after the increase. The wrinkle removal system of claim 7.

9. a surface of the film pressed by the pressing portion is located inside the roll of the film relative to the surface of the film imaged by the imaging device; The wrinkle removal system of claim 1 .

10. The roll has a first roll and a second roll for separating the two-layer film and winding each layer, the imaging device images the first roll and the second roll within the same field of view; the captured image includes a first surface of the film wound around the first roll and a second surface of the film wound around the second roll; The wrinkle removal system of claim 1 .

11. the image processing unit performs edge detection processing on the captured image in an axial direction of the roll, calculates an edge integrated value by integrating pixels in which edges are detected in a circumferential direction of the roll, and detects the wrinkles on the first surface and the second surface based on the edge integrated value. The wrinkle removal system of claim 10.

12. the image processing unit has different thresholds for the edge integrated value when detecting the wrinkles between the first surface and the second surface, The wrinkle removal system of claim 11.

13. The roll has a first roll and a second roll for separating the two-layer film and winding each layer, The imaging device includes a first imaging device that images a first surface of the film wound around the first roll, and a second imaging device that images a second surface of the film wound around the second roll. The wrinkle removal system of claim 1 .

Images