JP2015127706A - Surface inspection device for roll-like laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the surface inspection device for roll-like laminate.SOLUTION: The surface inspection device of a roll-like laminate includes: a lighting device 40 and a video acquisition device 50 for the surface inspection of a roll-like laminate 10; a first remote distance measurement device 45 for measuring a remote distance between the lighting device 40 and the irradiation surface of the diameter-expanded roll-like laminate 10; second remote distance information processing means 55 and 55' for acquiring and processing materials required for controlling the remote distance between the video acquisition device 50 and the irradiation surface of the diameter-expanded roll-like laminate 10; and a driving device 60 arranged for allowing the lighting device 40 or the video acquisition device 50 to move on the basis of a signal to be received from the first remote distance measurement device 45 or the second remote distance information processing means such that the remote distance between the lighting device 40 or the video acquisition device 50 and the irradiation surface of the diameter-expanded roll-like laminate is held.

Description

  In the present invention, a material having a longer length than a thickness, such as a polarizing film, is laminated while being wound in a roll shape, and inspection is performed while minimizing the volume, and storage and movement are performed. The present invention relates to an apparatus for inspecting the surface state of a laminate that is wound while being laminated in a roll shape using an imaging device.

  As a conventional technique in the field to which the present invention is applied, in a method for inspecting a course material applied to a substrate during the manufacture of a composite item, foreign matter adheres to the surface of the course material while illuminating the inspection object. In order to check whether or not, a vision inspection system including an area illumination, a line generator, a sensor, and an image processor has been proposed (see, for example, Patent Document 1 below).

  Here, the area illumination illuminates an area of the course material. The line generator serves to generate a line of illumination across the area, the sensor captures an image of the area, and the image processor serves to analyze the image, more specifically, In particular, configured to identify debris on the course material in response to the area lighting in operation, and configured to identify placement distortion in response to the line generator in operation .

  However, since the camera and illumination, which are the main components that make up the video acquisition equipment used in such conventional technologies, are installed in a fixed manner, surface inspection is performed while laminating long materials in rolls. As the inspection progresses, the amount of the laminate that is wound into a roll increases. As a result, the diameter of the entire roll may expand and collide with the lighting device or camera device, and it is difficult to focus accurately. Therefore, there is a problem that a video suitable for inspection cannot be acquired.

  In particular, in an apparatus that acquires an irradiation image such as a camera apparatus, when it is intended to directly measure the separation distance in order to focus on the irradiated object, an infrared sensor or ultrasonic wave that utilizes the reverberation of electromagnetic waves Although the assistance of a separate sensor such as a sensor is required, there is a problem that it is difficult to overcome the disadvantage that the complexity of system construction increases when these sensors are provided separately.

Korean Published Patent Publication No. 10-2008-0106316

  The present invention has been devised in order to solve the above-described problems, and its purpose is to perform inspection when performing surface inspection while laminating a long material like a polarizing film in a roll shape. As a result, the amount of the laminate wound in a roll shape increases, and as a result, even when the diameter of the entire roll is increased, the illumination device or the camera device and the roll laminate are maintained at an appropriate focus while not colliding with each other. Thus, it is a technical problem to provide means for adjusting the separation distance between them.

  In addition, the present invention achieves the above-mentioned primary problem, and further, in an irradiation image acquisition device such as a camera device, separate distance is directly measured in order to focus on the irradiated object. Another technical challenge is to reduce the complexity of the overall system by building a system that does not require sensors.

  In order to achieve the above-mentioned object, the present invention provides a lighting apparatus and an image acquisition apparatus for surface inspection of a roll-shaped laminate, and a roll-shaped laminate that expands in diameter with the lighting apparatus, as a preferable means for solving the problem. Acquires materials required to control the separation distance between the first separation distance measuring device that measures the separation distance from the irradiation surface and the irradiation surface of the roll-shaped laminate that expands the diameter and the image acquisition device. The first separation distance measuring device so as to maintain a separation distance between the second separation distance information processing means to be processed and the illumination device or the image acquisition device and the irradiation surface of the roll-shaped laminate to be expanded in diameter. Or a driving device disposed to move the illumination device or the image acquisition device based on a signal received from the second separation distance information processing means, surface To provide a 査 apparatus.

  Here, as the video acquisition device, a camera for securing appropriate video data and signals is provided, and as the second separation distance information processing means, processing of video data acquired by the camera is performed. An image processing unit is provided for image processing such as an illumination image reflected by the surface of the laminate and image processing (image processing) is performed on the illumination image reflected by the surface of the laminate. It is configured to calculate the width and use this as control data for operating the driving device so as to maintain a separation distance between the camera and the irradiation surface of the roll-shaped laminate to expand the diameter, In order to directly measure the separation distance, an additional sensor such as an infrared sensor or an ultrasonic sensor that uses electromagnetic wave reverberation is required. Further preferred than the case of constructing a system for the.

  When conducting surface inspection while laminating a material with a longer length than a thickness, such as a polarizing film, in a roll shape, if the roll-shaped film laminate is expanded, the position of the illumination and the camera focus Although adjustment is necessary, according to the present invention, there is an effect that the automatic inspection can be smoothly performed by automatically controlling this.

  In particular, when a document related to the width of the reflected illumination image is used as the data of the second separation distance information processing means for adjusting the separation distance from the roll for securing the focal length of the camera, a generally used electromagnetic There is an effect that it is possible to appropriately control the separation distance between the camera and the roll by using the driving device without separately providing an infrared sensor, an ultrasonic sensor, or the like that uses the echo of the wave.

It is a whole block diagram of the surface inspection apparatus of the roll-shaped laminated body which concerns on this invention. In FIG. 1, it is an operation state figure of the structure which maintains the separation distance between an illuminating device and the irradiation surface of a roll-shaped laminated body. In FIG. 1, it is an operation state figure of the structure which concerns on 1st Embodiment which maintains the separation distance between the image acquisition apparatus and the irradiation surface of a roll-shaped laminated body. In FIG. 1, it is an operation state figure of the structure which concerns on 2nd Embodiment which maintains the separation distance between the image acquisition apparatus and the irradiation surface of a roll-shaped laminated body. Using the image acquired by the image acquisition device according to the second embodiment shown in FIG. 4, the width of the illumination image reflected by the surface of the laminate is measured, and the image from the surface of the laminate is determined from the degree of change relative to the reference value. It is explanatory drawing which shows the process of controlling the suitable separation distance of an acquisition apparatus. It is a figure which illustrates the suitable structure of the drive device arrange | positioned by the image | video acquisition apparatus.

  Hereinafter, a surface inspection apparatus for a roll-shaped laminate according to the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. For reference, in the following description, detailed descriptions of known functions and configurations that may unnecessarily obscure the subject matter of the present invention are omitted.

  FIG. 1 to FIG. 6 are views showing a preferred embodiment of the present invention. First, according to the first embodiment shown in FIG. 1, FIG. 2, FIG. 3, and FIG. A first separation distance measuring device 45 that measures a separation distance between the illumination device 40 for inspection and a video acquisition device 50 such as a camera, and the irradiation surface of the roll-shaped laminate 10 that expands the diameter; And a second separation distance information processing means for obtaining and processing a material required for controlling a separation distance between the image acquisition device 50 and the irradiation surface of the roll-shaped laminate 10 to expand the diameter. The first separation distance measuring device 45 or the second separation distance so as to maintain a separation distance between the displacement sensor 55 and the illumination device 40 or the image acquisition device 50 and the irradiation surface of the roll-shaped laminate expanding in diameter. Arranged as information processing means And a driving device 60 (see FIG. 6) arranged to move the illumination device 40 or the image acquisition device 50 based on a signal received from a position sensor 55, respectively. A laminate surface inspection apparatus is provided.

  As shown in FIG. 1, the roll laminate surface inspection apparatus to which the present invention can be applied is polarized before being wound on the roll laminate in addition to the above-described components. When the laminate is completely wound in a roll shape around the outer peripheral portion of the core 31 and the supply device 20 that continuously supplies the inspection object such as a film to the core 31 side, the roll-like laminate is transported to another place. And a core rotating turret 30.

  Hereinafter, with reference to FIG. 2 and FIG. 3, an apparatus configured to maintain a separation distance between the irradiation surface of the roll-shaped laminate 10 provided by the present invention and the illumination device 40 and the image acquisition device 50. The configuration and operation of will be described more specifically.

  Here, as shown in FIG. 2, the illuminating device 40 irradiates light for inspection, and the winding film is a roll-shaped laminate 10 for illuminating in order to secure the amount of light necessary for inspection. Are placed at a position that is as close to the maximum as possible with a minimum separation distance D0. As such an illuminating device 40, a condensing lens for amplifying the amount of light is used. On one side of such an illuminating device 40, a displacement sensor 45 is attached as the first separation distance measuring device 45 described above, The separation distance h0 between the roll-shaped laminate 10 is measured and maintained at a predetermined distance, or it is moved stepwise (h1 → h2: Δh) to collide with the roll-shaped laminate 10 to be inspected. Basic control data for controlling the driving device 60 to be avoided is provided.

  Further, referring to FIG. 3 showing the first embodiment of the present invention, second separation distance information attached to one side of the video acquisition device 50 including a camera 50 for securing appropriate video material and signals. As the processing means, the same displacement sensor as that used in the lighting device 40 described above is used, but the second separation distance information processing means is provided on one side of the camera 50 arranged as the image acquisition device 50 in this way. The displacement sensor 55 is attached to the roll-shaped laminate 10 and the separation distance ch0 (L0 from the camera lens) is measured to maintain a predetermined distance or move stepwise (ch1 → ch2: ΔL). Basic control data for controlling the driving device 60 and its control device 70 so as to ensure an appropriate focal length while avoiding a collision with the roll-shaped laminate 10 to be inspected. Subjected to.

  On the other hand, according to 2nd Embodiment shown in FIG.2, FIG.4, FIG.5 and FIG. 6, the image acquisition apparatuses 50, such as the illuminating device 40 and camera for the surface inspection of the roll-shaped laminated body 10, and the said illuminating device. 40 and the first separation distance measuring device 45 that measures the separation distance between the irradiation surface of the roll-shaped laminate 10 that expands the diameter, and the image acquisition device 50 and the irradiation surface of the roll-shaped laminate 10 that expands the diameter. The second separation distance information processing means for acquiring and processing the material required for controlling the separation distance is disposed in the image acquisition device 50 and is reflected by the surface of the laminate 10. Separation between the image processing unit 55 ′ arranged to calculate the change in the width W of the illumination image 40 r and the irradiation surface of the roll-shaped laminate expanding in diameter with the illumination device 40 or the image acquisition device 50. Distance The illumination device 40 or the video acquisition device 50 is controlled based on a signal received from the image processing unit 55 ′ disposed as the first separation distance measuring device 45 or the second separation distance information processing means. There is provided a surface inspection device for a roll-like laminate, characterized in that it comprises a drive device 60 (see FIG. 6) arranged to move respectively.

  For example, when the video acquisition device 50 is the camera 50, more preferably, instead of the displacement sensor (sensor that directly measures the separation distance) described based on the first embodiment, FIG. 4, FIG. 5, and FIG. As in the second embodiment illustrated in FIG. 6, the image data (illumination image reflected on the film distinguished from the film outer area and the film area) 40 r acquired by the camera 50 as the image acquisition device 50 is used. Image processing (image processing) is performed using an image processing unit 55 ′ (a component used instead of the displacement sensor of the first embodiment) disposed in the camera 50 device as the second separation distance information processing means. The width W of the illumination image 40r reflected by the surface of the laminate 10 is calculated, and the change in the reference values W0 and L0 Although the appropriate separation distance of the image acquisition device 50 from the surface of the laminate 10 is controlled from the mating, the width W of the illumination image is further increased to a predetermined limit value Wmax or more as illustrated in FIGS. Then (that is, when the separation distance L from the surface of the laminate 10 is equal to or less than Lmin), the image acquisition device 50 is moved backward by a predetermined distance ΔL using the driving device 60 (so that it becomes the W0: L0 reference value). It is more preferable to adopt a method of transferring control data to the control device 70 so as to move, and the specific configuration of the image processing for calculating the width W of the illumination image is as follows. The image processing unit 55 ′ serves as a control unit that calculates a change in the illumination image width in the camera 50 and constitutes control data based on the change. Arranged, which on the basis of the control data calculated by controlling the driving unit 60 so as to ensure a proper focal distance using the control device 70.

  Here, under the situation where the inspection is repeatedly performed under a predetermined condition, even if a partial change occurs in the distance between the illumination and the surface of the laminate in real time, the width W of the illumination image and the laminate 10 Therefore, an appropriate relational expression is established between the distance L from the surface of the camera 50 and the direct control data necessary to ensure an appropriate focal length of the camera 50 is the distance data. The image width W can be used as control data for the stepwise movement of the camera 50 without converting it into the separation distance data, and the focusing operation by the operation of the lens after the overall position movement of the camera 50 is performed. Is done separately.

  On the other hand, although not shown, the rate of change with respect to the reference value of the illuminance value obtained from an illuminance sensor (not shown) provided as a normal operation mechanism in the image acquisition device itself (predetermined illuminance as in an examination room). It is also possible to calculate the change in the width of the illumination reflected by the surface of the laminate 10 from the condition in which the other conditions are excluded in the holding condition), and from this the image acquisition from the surface of the laminate by the trigonometric function arc method Since the separation distance of the apparatus can be calculated, the second separation distance information processing means can be adopted as the illuminance measuring apparatus and the illuminance-distance conversion means arranged to realize this.

  Further, as illustrated in FIG. 6, an LM guide 62 and a motor 64 are used as the driving device 60, and in this case, the operating state of the motor 64 connected to the support base 50 a of the image acquisition device 50 is the first state. It goes without saying that the control is performed by the control device 70 that calculates the operation control signal of the motor 64 based on the signal from the separation distance measuring device 45 or the second separation distance information processing means.

  On the other hand, when the working distance is not large, a drive cylinder (not shown) is used more efficiently as a drive device instead of the LM guide and the motor. However, when the cylinder is used in this way, many cylinders are used. It is preferable to configure in a multi-stage and perform accurate and quick position adjustment for each stage.

  The present invention has been described in detail with reference to the preferred embodiments. However, those skilled in the art to which the present invention pertains can have various specific details without changing the technical idea and essential features of the present invention. It should be understood that the above-described embodiments are illustrative in all aspects and not limiting, since they can be implemented in forms.

  The scope of the present invention is specified by the following claims rather than the above detailed description, and any changes or modifications derived from the meaning and scope of the claims and the equivalent concept thereof are described in the present invention. It should be construed as included in the scope.

10: Rolled laminate 20: Supply device 30: Core rotating turret 31: Core 40: Lighting device 40r: Lighting image 50: Video acquisition device (camera)
45: First separation distance measuring device 55: Displacement sensor 55 ': Image processing unit 60: Drive device 62: LM guide 64: Motor 70: Control device

Claims (3)

An illumination device 40 and an image acquisition device 50 for surface inspection of the roll laminate 10;
A first separation distance measuring device 45 that measures a separation distance between the illumination device 40 and the irradiation surface of the roll-shaped laminate 10 that expands in diameter;
The image acquisition device 50 as a second separation distance information processing means for acquiring and processing a material required for controlling the separation distance between the image acquisition device 50 and the irradiation surface of the roll-shaped laminate 10 whose diameter is expanded. An image processing unit 55 ′ arranged to calculate a change in the width W of the illumination image 40r reflected by the surface of the laminate 10,
Arranged as the first separation distance measuring device 45 or the second separation distance information processing means so as to maintain a separation distance between the illumination device 40 or the image acquisition device 50 and the irradiation surface of the roll-shaped laminate expanding in diameter. A driving device 60 arranged to move the illumination device 40 or the video acquisition device 50 based on a signal received from an image processing unit 55 ′ provided;
An apparatus for inspecting a surface of a roll-shaped laminate. An illumination device 40 and an image acquisition device 50 for surface inspection of the roll laminate 10;
A first separation distance measuring device 45 that measures a separation distance between the illumination device 40 and the irradiation surface of the roll-shaped laminate 10 that expands in diameter;
Displacement disposed as second separation distance information processing means for obtaining and processing data required to control the separation distance between the image acquisition device 50 and the irradiation surface of the roll-shaped laminate 10 that expands in diameter. Sensor 55;
Arranged as the first separation distance measuring device 45 or the second separation distance information processing means so as to maintain a separation distance between the illumination device 40 or the image acquisition device 50 and the irradiation surface of the roll-shaped laminate expanding in diameter. A driving device 60 disposed to move the illumination device 40 or the image acquisition device 50 based on a signal received from a displacement sensor 55 provided;
An apparatus for inspecting a surface of a roll-shaped laminate.   The illumination device 40 is provided with a condensing lens for amplifying the amount of light, and a displacement sensor 45 is attached to one side of the illumination device 40 as the first separation distance measuring device 45 to form a roll-shaped laminate. The basis is to measure the separation distance h0 between the two and maintain a predetermined distance, or move in steps (h1 → h2: Δh) to avoid collision with the roll-shaped laminate 10 to be inspected. The surface inspection apparatus for a roll-shaped laminate according to claim 1 or 2, wherein the control data is provided.

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