Diaphragm detection device and diaphragm splitting machine

Abstract

The utility model provides a diaphragm detection device and a diaphragm splitting machine, and relates to the technical field of diaphragm production equipment. The diaphragm detection device comprises at least one image acquisition assembly, the image acquisition assembly comprises a camera and a light source, the camera is located on one side of a diaphragm, the light source is located on the other side of the diaphragm and used for providing illumination light, and the included angle between the irradiation direction of the light source and the diaphragm meets a preset included angle A, the camera is used for acquiring an image of the diaphragm in the irradiation area of the light source. According to the invention, the diaphragm can be detected in real time, the missed detection probability is reduced, and the delivery quality of the diaphragm can be controlled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of diaphragm production equipment, in particular to a diaphragm detection device and a diaphragm slitting machine. BACKGROUND

[0002] In order to increase the performance and safety of lithium battery diaphragms, a coating layer needs to be formed on the surface of the base film. The diaphragm coating method is usually selected according to different application scenarios and performance requirements of the diaphragm, that is, single-sided coating or double-sided coating. After coating, it is necessary to detect whether the film surface is missing during the slitting process. Usually, the detection method is to use manual photographing sampling for sampling inspection, which cannot control the quality of the diaphragm leaving the factory. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the purpose of the present application is to overcome the shortcomings of the prior art and provide a diaphragm detection device and a diaphragm slitting machine, which can realize real-time detection of diaphragms, reduce the probability of missing detection, and control the quality of diaphragms leaving the factory.

[0004] The present application provides the following technical solutions:

[0005] In a first aspect, the present application provides a diaphragm detection device, which comprises:

[0006] At least one image acquisition component, the image acquisition component comprising a camera and a light source, the camera being located on one side of the diaphragm, and the light source being located on the other side of the diaphragm, the light source being used to provide illuminating light, the angle between the illuminating direction of the light source and the diaphragm satisfying a preset angle A, and the camera being used to acquire an image of the part of the diaphragm located in the irradiation area of the light source.

[0007] In some embodiments of the first aspect, the diaphragm detection device comprises:

[0008] A rack, the camera and the light source being arranged on the rack;

[0009] Two material guiding rollers, the two material guiding rollers being arranged on the rack, the diaphragm being wound around the two material guiding rollers, so that the diaphragm located between the two material guiding rollers is at least partially located in the irradiation range of the light source, and the angle between the diaphragm located between the two material guiding rollers and the illuminating direction of the light source is the preset angle A.

[0010] In some embodiments of the first aspect, the number of the image acquisition assemblies is two, and the two image acquisition assemblies are sequentially arranged in the moving direction of the diaphragm; wherein the two image acquisition assemblies are a first image acquisition assembly and a second image acquisition assembly, the camera of the first image acquisition assembly is directed to one side of the diaphragm to acquire an image of the one side of the diaphragm, and the camera of the second image acquisition assembly is directed to the other side of the diaphragm to acquire an image of the other side of the diaphragm.

[0011] In some embodiments of the first aspect, the installation positions of the two material guide rollers have a height difference, so that the part of the diaphragm between the two material guide rollers has a first end and a second end, and the first end is higher or lower than the second end; wherein the first image acquisition assembly is close to the first end, and the second image acquisition assembly is close to the second end.

[0012] In some embodiments of the first aspect, the illumination direction of the light source of the first image acquisition assembly is directed to the diaphragm and corresponds to the direction of the camera of the first image acquisition assembly, and the illumination direction of the light source of the second image acquisition assembly is directed to the diaphragm and corresponds to the direction of the camera of the second image acquisition assembly.

[0013] In some embodiments of the first aspect, the illumination direction of the light source of the first image acquisition assembly and the illumination direction of the light source of the second image acquisition assembly are arranged in opposite directions.

[0014] In some embodiments of the first aspect, the illumination direction of the light source is vertically arranged.

[0015] In some embodiments of the first aspect, the illumination light provided by the light source is parallel illumination light.

[0016] In some embodiments of the first aspect, the preset included angle A satisfies: 15°≤A≤20°.

[0017] In the second aspect, the application further provides a diaphragm slitting machine, which comprises the diaphragm detection device according to any one of the above embodiments.

[0018] The embodiments of the application have the following advantages:

[0019] The application provides a diaphragm detection device, which optimizes the arrangement of the camera and the light source, especially the preset included angle between the light source and the diaphragm, to ensure uniform and appropriate illumination, thereby improving the clarity and contrast of the image. The design of the preset included angle can effectively reduce the shadow caused by direct or reflected light, so that the coating defects are easier to be identified.

[0020] And, the diaphragm detection device can detect the diaphragm flowing on the production line in real time, rather than relying on manual sampling inspection, ensuring that all products undergo strict quality inspection. The detection results can be immediately fed back to the control system or operator, allowing for quick response and correction of problems on the production line to prevent defective products from flowing into subsequent processes. In addition, the automated detection process reduces the need for human intervention, reduces production line downtime due to quality control, and an efficient detection system does not become a bottleneck in production, helping to maintain or even increase overall production speed. Of course, compared to traditional sampling inspection, the device achieves full-coverage detection of the entire diaphragm surface, greatly reducing the probability of missed detection.

[0021] The application also relates to a diaphragm slitting machine, since the diaphragm detection device has the above technical effects, the diaphragm slitting machine comprising the diaphragm detection device should have the same technical effects, which will not be described here.

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as a limitation on the scope, for those skilled in the art, without creative labor, can also obtain other related drawings according to these drawings.

[0024] Figure 1 A perspective view of a structure of a diaphragm detection device provided by an embodiment of the present application is shown;

[0025] Figure 2 Another perspective view of a structure of a diaphragm detection device provided by an embodiment of the present application is shown.

[0026] Main element symbol explanation:

[0027] 100 - rack; 200 - image acquisition assembly; 210 - camera; 220 - light source; 300 - diaphragm; 400 - material guide roller; A - preset included angle; X - irradiation direction. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation on the present application.

[0029] It is to be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. Like terms are used to describe like elements in the figures and the description.

[0030] In this application, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0031] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used in the specification of the template are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] In the related art, in order to increase the performance and safety of the lithium battery separator during the production process, a coating layer needs to be coated on the surface of the base film. According to the different application scenarios of the separator and the required performance requirements, the coating method of the separator is selected, that is, single-sided coating or double-sided coating. After coating, it is necessary to detect whether the film surface is missing coating during the slitting process. Usually, the detection method is to use manual sampling and sampling to detect, which cannot control the whole separator quality.

[0034] As Figure 1 and Figure 2As shown, in order to solve the above technical problems, the diaphragm detection device provided by the embodiment of the present application comprises at least one image acquisition assembly 200, the image acquisition assembly 200 comprises a camera 210 and a light source 220, the camera 210 is located on one side of the diaphragm 300, and the light source 220 is located on the other side of the diaphragm 300, the light source 220 is used for providing illuminating light, the included angle between the irradiation direction X of the light source 220 and the diaphragm 300 satisfies a preset included angle A, and the camera 210 is used for acquiring images of the part of the diaphragm 300 located in the irradiation area of the light source 220.

[0035] In these embodiments, the image acquisition assembly 200 is composed as follows:

[0036] The camera 210 is used for capturing images of the surface of the diaphragm 300. The light source 220 is located on the other side of the diaphragm 300 to provide necessary illuminating light for the camera 210. Moreover, the camera 210 and the light source 220 are respectively located on the two sides of the diaphragm 300, so that the camera 210 can clearly capture the coating condition on the diaphragm 300. In addition, the irradiation direction X of the light source 220 and the diaphragm 300 maintain a preset included angle A, so as to optimize the lighting effect and avoid shadow or reflection interference with the image quality.

[0037] Among them, the camera 210 is responsible for acquiring images of the diaphragm 300 in the irradiation area of the light source 220, and these images are the basis for subsequent analysis of whether the surface coating of the diaphragm 300 is uniform, whether there is a missing coating and other defects. Generally, the image visual detection technology is adopted to realize real-time surface defect detection of the diaphragm 300 running at high speed. That is, through the high-performance camera 210, the product surface image is collected, if there is a defect, the defect is processed through the data processing board card, the processing of the data processing board card includes classifying and positioning the defect, outputting an alarm and displaying a defect image. Exemplarily, the camera 210 is a high-performance linear array black-and-white camera.

[0038] In addition, the light source 220 provides stable and uniform illumination to ensure that the camera 210 can obtain high-contrast and high-resolution images, thereby improving the detection accuracy. It should be noted that the included angle between the irradiation direction X of the light source 220 and the diaphragm 300 is carefully designed, and the purpose is to achieve the best lighting effect. This angle needs to be determined through a large number of experiments and creative labor to ensure that the diaphragm 300 surface can be fully illuminated, and the imaging quality will not be affected by the over-strong reflection.

[0039] Exemplarily, the type of the light source 220 is selected appropriately, such as an LED lamp, which can improve the quality of the image, and the stability and energy consumption problems of long-time work are considered. In addition, the color temperature of the light source 220 also needs to be considered for some special applications to adapt to different coating material properties.

[0040] In addition to the hardware part, it is also necessary to cooperate with efficient image processing software to automatically identify and analyze the obtained image data. This involves the application of edge detection, contrast enhancement, pattern recognition and other algorithms.

[0041] Of course, in order not to affect the normal production process, the image acquisition component 200 should be integrated into the existing production line as compactly as possible. For example, the positions of the camera 210 and the light source 220 are arranged reasonably on the diaphragm 300 transmission path to ensure that effective detection can be carried out without interfering with the movement of the diaphragm 300.

[0042] Furthermore, the operation of the camera 210 and the light source 220 should be synchronized, that is, when the camera 210 starts shooting, the light source 220 should be turned on in time and maintain appropriate brightness; after shooting, the light source 220 can appropriately reduce the brightness to save energy. The system should have the ability to process images in real time and feed back the detection results to the operator or control system in time so as to take corrective measures in time.

[0043] Therefore, compared with the traditional manual sampling inspection method, the device realizes continuous and automatic detection of the diaphragm 300, greatly improves the detection efficiency and accuracy, saves time and labor, reduces labor costs, and reduces the rate of defective products caused by missed detection, thereby indirectly saving production costs. Obviously, through strict detection of the diaphragm 300, the high-quality output of the product is ensured, and the market competitiveness is enhanced. In summary, the diaphragm detection device provides a reliable quality assurance means for the production of lithium battery diaphragm 300.

[0044] As shown in Figure 1 and Figure 2 In some embodiments, the diaphragm detection device includes a rack 100 and two material guide rollers 400, the camera 210 and the light source 220 are arranged on the rack 100; the two material guide rollers 400 are arranged on the rack 100, the diaphragm 300 is wound around the two material guide rollers 400, so that the diaphragm 300 located between the two material guide rollers 400 is at least partially located in the illumination range of the light source 220, and the diaphragm 300 located between the two material guide rollers 400 and the illumination direction X of the light source 220 form a preset included angle A.

[0045] In these embodiments, the diaphragm detection device ensures that the diaphragm 300 can be accurately placed in the best lighting conditions during the detection process through the rack 100 and the material guide roller 400 system.

[0046] The rack 100 serves as the basic structure of the entire detection device, and is used to fix and support components such as the camera 210, the light source 220, and the guide roller 400. Two guide rollers 400 are installed on the rack 100 to guide the transmission path of the diaphragm 300, so that the diaphragm 300 can maintain a stable running state in the detection area. The camera 210 is arranged on the rack 100 and located on one side of the diaphragm 300, responsible for capturing images of the diaphragm 300 surface. The light source 220 is also arranged on the rack 100 and located on the other side of the diaphragm 300, providing necessary illumination for the camera 210.

[0047] The diaphragm 300 passes through the two guide rollers 400 to form a specific path, ensuring that the part of the diaphragm 300 between the two guide rollers 400 is at least partially within the illumination range of the light source 220. By adjusting the position or angle of the guide roller 400, the diaphragm 300 and the illumination direction X of the light source 220 maintain a preset angle A, to achieve the best lighting effect and image quality.

[0048] Obviously, the guide roller 400 ensures the stable transmission of the diaphragm 300 in the detection area, reducing the problem of image blur caused by the shaking or deviation of the diaphragm 300. By precisely controlling the angle between the diaphragm 300 and the light source 220, clear and consistent images can be obtained every time, improving the reliability and repeatability of the detection results. Since the diaphragm 300 is always under optimal lighting conditions, the camera 210 can continuously obtain high-quality images, realizing real-time detection of the diaphragm 300 on the production line. Of course, the path and angle of the diaphragm 300 can be changed by adjusting the position of the guide roller 400, to adapt to diaphragm 300 products of different widths or thicknesses. Moreover, by reasonably utilizing space, all necessary components are concentrated on the rack 100, saving space.

[0049] Of course, in combination with image processing and data analysis software, data from each detection can be recorded, providing an important reference for product quality improvement. By accumulating a large amount of detection data, more intelligent diagnostic algorithms can be developed, further improving the automation level of the detection system. In particular, if the camera 210 and the light source 220 are arranged on both sides of the rack 100, simultaneous detection of both sides of the diaphragm 300 can be achieved, further improving detection efficiency and accuracy. The automated detection process reduces the dependence on manual detection, reduces labor costs, and avoids errors caused by human factors.

[0050] For example, Figure 1 And Figure 2As shown, in some embodiments, the number of image acquisition assemblies 200 is two, and the two image acquisition assemblies 200 are sequentially arranged in the moving direction of the diaphragm 300; wherein the two image acquisition assemblies 200 are respectively a first image acquisition assembly and a second image acquisition assembly, the camera 210 of the first image acquisition assembly faces one side of the diaphragm 300 to acquire an image of the one side of the diaphragm 300, and the camera 210 of the second image acquisition assembly faces the other side of the diaphragm 300 to acquire an image of the other side of the diaphragm 300.

[0051] In these embodiments, two image acquisition assemblies 200 are provided in the embodiments of the present application, one side of the diaphragm 300 is defined as a first side, and the other side of the diaphragm 300 is defined as a second side, and the first side and the second side are oppositely arranged to achieve separate detection of the second side and the first side of the diaphragm 300. Each image acquisition assembly 200 includes a camera 210 and a corresponding light source 220, and the two assemblies are sequentially arranged in the moving direction of the diaphragm 300. Among them, the first image acquisition assembly is located upstream of the moving path of the diaphragm 300. The camera 210 faces the first side of the diaphragm 300 and is used to acquire an image of the first side of the diaphragm 300. The light source 220 is located on the side of the second side of the diaphragm 300 to provide necessary illumination for the first side camera 210, ensuring that the coating condition of the first side can be clearly captured.

[0052] The second image acquisition assembly is located downstream of the moving path of the diaphragm 300 and follows the first image acquisition assembly. The camera 210 faces the second side of the diaphragm 300 and is used to acquire an image of the second side of the diaphragm 300. The light source 220 is located on the side of the first side of the diaphragm 300 to provide necessary illumination for the second side camera 210, ensuring that the coating condition of the second side can be clearly captured.

[0053] Obviously, by providing two image acquisition assemblies 200, the second side and the first side of the diaphragm 300 are detected respectively, and comprehensive monitoring of both sides of the diaphragm 300 is achieved, avoiding the problem of possible omission of single-side detection. Double-side detection can be completed in one pass, without the need to flip or detect the diaphragm 300 twice, improving production efficiency. It should be noted that since each image acquisition assembly 200 focuses on one side of the diaphragm 300, the problem of light reflection or interference caused by simultaneous detection of both sides is reduced. Moreover, this scheme can be easily integrated into existing production equipment, without the need for large-scale technical transformation, reducing implementation costs. Reasonably utilize space, and concentrate all necessary components on the rack 100, saving space.

[0054] As Figure 1 and Figure 2As shown, in some embodiments, the installation positions of the two material guide rollers 400 have a height difference, so that the part of the diaphragm 300 between the two material guide rollers 400 has a first end and a second end, the first end is higher or lower than the second end; wherein the first image acquisition assembly is close to the first end, and the second image acquisition assembly is close to the second end.

[0055] In these embodiments, the two material guide rollers 400 have a height difference in the embodiments of the present application to optimize the position and angle of the diaphragm 300 during detection. The two material guide rollers 400 are installed on the rack 100, both of which are horizontally arranged, and the installation positions of the two material guide rollers 400 have a height difference, so that the part of the diaphragm 300 between the two material guide rollers 400 forms an inclined angle.

[0056] The first image acquisition assembly is close to the lower first end of the diaphragm 300, located upstream of the moving direction of the diaphragm 300, and the camera 210 is directed towards the first face of the diaphragm 300, for acquiring the image of the first face of the diaphragm 300.

[0057] The second image acquisition assembly is close to the higher second end of the diaphragm 300, located downstream of the moving direction of the diaphragm 300, and the camera 210 is directed towards the second face of the diaphragm 300, for acquiring the image of the second face of the diaphragm 300.

[0058] Due to the height difference between the two material guide rollers 400, the diaphragm 300 will form a slight inclined angle when passing between the two material guide rollers 400. This design helps to ensure that the diaphragm 300 maintains a stable tension during detection, and reduces the possibility of diaphragm 300 shaking. The diaphragm 300 first passes through the first image acquisition assembly, and the first face camera 210 captures the first face image; then as the diaphragm 300 continues to move, it enters the second image acquisition assembly at a higher position, and the second face camera 210 captures the second face image.

[0059] Wherein, the inclined angle of the diaphragm 300 helps to reduce the shaking during transmission, ensuring the stability of image acquisition, thereby improving the accuracy and consistency of detection results. By adjusting the height difference of the material guide rollers 400, the angle between the diaphragm 300 and the light sources 220 of the two image acquisition assemblies 200 can be controlled more finely and quickly.

[0060] Furthermore, since the two image acquisition assemblies 200 are located at different heights to detect the parts of the diaphragm 300 at different heights, the interference between the light sources 220 of the two image acquisition assemblies 200 can be effectively reduced, improving the detection precision and accuracy.

[0061] Of course, it should be noted that the first end can also be set higher than the second end, and the setting method is the same as described above, except that the first image acquisition assembly is close to the higher first end of the diaphragm 300, and the second image acquisition assembly is close to the lower first end of the diaphragm 300, and the same effect can be achieved, which will not be described here.

[0062] As shown in Figure 1 and Figure 2 In some embodiments, the illumination direction X of the light source 220 of the first image acquisition assembly is towards the diaphragm 300 and corresponds to the camera direction of the first image acquisition assembly, and the illumination direction X of the light source 220 of the second image acquisition assembly is towards the diaphragm 300 and corresponds to the camera direction of the second image acquisition assembly.

[0063] In these embodiments, the illumination direction X and position of the light source 220 are particularly optimized. The rack 100 serves as the basic structure of the entire detection device, and is used to fix and support the camera 210, the light source 220, and the material guide roller 400 and other components. Two material guide rollers 400 are installed on the rack 100, and the installation positions of the two material guide rollers 400 have a height difference, so that the part of the diaphragm 300 between the two material guide rollers 400 forms an inclined angle. The first image acquisition assembly is close to the lower first end of the diaphragm 300 and is located upstream of the moving direction of the diaphragm 300, and the light source 220 is located on the second side of the diaphragm 300 and is lower than the light source 220 of the second image acquisition assembly, and is towards the second face of the diaphragm 300, providing necessary illumination for the first face camera 210. The second image acquisition assembly is close to the higher second end of the diaphragm 300 and is located downstream of the moving direction of the diaphragm 300. The camera 210 is towards the second face of the diaphragm 300 and is used to acquire the image of the second face of the diaphragm 300. The light source 220 is located on the first side of the diaphragm 300 and is higher than the light source 220 of the first image acquisition assembly. It is towards the first face of the diaphragm 300, providing necessary illumination for the second face camera 210.

[0064] Obviously, the light source 220 of the first image acquisition assembly is towards the second face of the diaphragm 300, and the light source 220 of the second image acquisition assembly is towards the first face of the diaphragm 300. Such an arrangement can effectively avoid mutual interference between the light sources 220, while ensuring that each camera 210 can obtain the best lighting conditions. The height difference of the light sources 220 can help better utilize light, especially when detecting the first face of the diaphragm 300, which can more effectively avoid shadows and reflections, ensuring image quality.

[0065] As shown in Figure 1 and Figure 2 In some embodiments, the illumination direction X of the light source 220 of the first image acquisition assembly and the illumination direction X of the light source 220 of the second image acquisition assembly are arranged in opposite directions.

[0066] In these embodiments, the light source 220 of the first image acquisition assembly is arranged to irradiate downward along the direction X, and the light source 220 of the second image acquisition assembly is arranged to irradiate upward along the direction X. The second surface of the diaphragm 300 is irradiated from above, and the first surface camera 210 is provided with necessary illumination. The second image acquisition assembly is arranged upward, and the first surface of the diaphragm 300 is irradiated from below, and the second surface camera 210 is provided with necessary illumination. The light source 220 of the first image acquisition assembly irradiates the second surface of the diaphragm 300 downward, ensuring that the light uniformly passes through the diaphragm 300, so that the first surface camera 210 can clearly capture the coating condition of the first surface. The light source 220 of the second image acquisition assembly irradiates the first surface of the diaphragm 300 upward, ensuring that the second surface camera 210 can obtain high-contrast and clear images, so as to accurately detect the coating condition of the second surface.

[0067] The up-and-down irradiation direction X of the light source 220 can effectively avoid light interference between the two image acquisition assemblies 200, and ensure that each camera 210 can obtain a clear image. It should be noted that the up-and-down irradiation design can produce better contrast and clarity, especially for transparent or semi-transparent diaphragm 300 materials, which can significantly improve the quality of the images, making it easier to identify coating defects.

[0068] As shown in Figure 1 and Figure 2 , in some embodiments, the irradiation direction X of the light source 220 is vertically arranged.

[0069] In these embodiments, after adjusting the irradiation direction X of the light source 220 to be vertical, only the position of the pair of material guiding rollers 400 needs to be controlled in the subsequent process, so that the included angle between the diaphragm 300 and the irradiation direction X meets the required preset included angle A, which is beneficial to subsequent adjustment.

[0070] In addition, by controlling the irradiation direction X of the light source 220 to be vertical, the horizontal space occupied by the device can be reduced.

[0071] In some embodiments, the illumination light provided by the light source 220 is parallel illumination light.

[0072] In these embodiments, the illumination light provided by the light source 220 is particularly optimized to be parallel illumination light. Parallel illumination light can effectively reduce the shadow and reflection problems caused by different angles of the light source 220, and ensure that each camera 210 can obtain uniform and clear images. That is, the parallel light beam irradiates the surface of the diaphragm 300 at a consistent angle, reducing the influence of light scattering and refraction, and improving the imaging quality.

[0073] As shown in Figure 1 and Figure 2 , in some embodiments, the preset included angle A satisfies: 15°≤A≤20°.

[0074] In these embodiments, the angle A between the irradiation direction X of the light source 220 and the surface of the diaphragm 300 is precisely controlled to ensure optimal lighting effects and image quality.

[0075] Defining the preset angle A within 15° to 20° can effectively reduce the shadow and reflection problems caused by different angles of the light source 220, ensuring that each camera 210 can obtain uniform and clear images. The angle within this range can ensure that the light irradiates the surface of the diaphragm 300 at the optimal angle, reducing the effects of light scattering and refraction, and improving the imaging quality.

[0076] For example, the preset angle A can be 15°, 16°, 17°, 18°, 19°, or 20°, etc.

[0077] In some embodiments, the application also provides a diaphragm slitting machine, which comprises the diaphragm detection device according to any one of the above embodiments.

[0078] Since the diaphragm detection device has the above technical effects, the diaphragm slitting machine comprising the diaphragm detection device should also have the same technical effects, which will not be described here.

[0079] For example, a roll of diaphragm 300 to be detected passes through the original equipment guide roller on one side of the rack 100, and passes through the newly added pair of material guide rollers 400 to change the diaphragm path, reserve installation space for the diaphragm detection device, and then continue to pass through the original equipment material guide roller 400 on the other side of the rack 100.

[0080] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not as a limitation, and thus, other examples of example embodiments can have different values.

[0081] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0082] The above-described embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the application. It should be noted that for those skilled in the art, without departing from the concept of the application, several modifications and improvements can be made, which are all within the protection scope of the application.

Claims

1. A diaphragm detection device, characterized by, The diaphragm detection device comprises: at least one image acquisition assembly, the image acquisition assembly comprising a camera and a light source, the camera being located on one side of the diaphragm, and the light source being located on the other side of the diaphragm, the light source being configured to provide illuminating light, the angle between the illuminating direction of the light source and the diaphragm satisfying a preset angle A, and the camera being configured to acquire an image of the part of the diaphragm located in the irradiation area of the light source; a rack, the camera and the light source being arranged on the rack; two material guide rollers, the two material guide rollers being arranged on the rack, the diaphragm being wound around the two material guide rollers, so that the diaphragm located between the two material guide rollers is at least partially located in the irradiation range of the light source, and the angle between the diaphragm located between the two material guide rollers and the illuminating direction of the light source is the preset angle A; the number of the image acquisition assemblies is two, and the two image acquisition assemblies are sequentially arranged in the moving direction of the diaphragm; wherein the two image acquisition assemblies are respectively a first image acquisition assembly and a second image acquisition assembly, the camera of the first image acquisition assembly is directed to one side of the diaphragm to acquire an image of one side of the diaphragm, and the camera of the second image acquisition assembly is directed to the other side of the diaphragm to acquire an image of the other side of the diaphragm.

2. The septum testing device of claim 1, wherein, The installation positions of the two material guide rollers have a height difference, so that the part of the diaphragm located between the two material guide rollers has a first end and a second end, the first end being higher or lower than the second end; wherein the first image acquisition assembly is close to the first end, and the second image acquisition assembly is close to the second end.

3. The septum testing device of claim 2, wherein, The illuminating direction of the light source of the first image acquisition assembly is directed to the diaphragm and corresponds to the direction of the camera of the first image acquisition assembly, and the illuminating direction of the light source of the second image acquisition assembly is directed to the diaphragm and corresponds to the direction of the camera of the second image acquisition assembly.

4. The septum detection device of claim 3, wherein The illuminating direction of the light source of the first image acquisition assembly and the illuminating direction of the light source of the second image acquisition assembly are arranged in opposite directions.

5. The septum detection device of any one of claims 2 to 4, wherein, The illuminating direction of the light source is vertically arranged.

6. The septum testing device of claim 1, wherein, The illuminating light provided by the light source is parallel illuminating light.

7. The septum testing device of claim 1, wherein, The preset angle A satisfies 15°≤A≤20°.

8. A diaphragm slitter characterized by, The diaphragm slitting machine comprises the diaphragm detection device according to any one of claims 1 to 7.

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