Detection system for membrane electrode strip

Abstract

The utility model relates to the technical field of membrane electrode detection, in particular to a detection system for a membrane electrode strip. The detection system comprises a shooting device, a jet printing device and a control terminal, wherein the shooting device and the jet printing device are arranged on a membrane electrode production line; the shooting device is used for shooting the membrane electrode strip produced by the membrane electrode production line and outputting a to-be-detected image of the membrane electrode strip to the outside; the jet printing device is located at the downstream preset position of the shooting device in the conveying direction of the membrane electrode strip, and in the production process of the membrane electrode, when the control terminal determines that the membrane electrode strip has surface defects according to the to-be-detected image, the jet printing device is controlled to conduct jet printing marking on the defect positions of the membrane electrode strip. According to the technical scheme of the utility model, the membrane electrode strip produced on the membrane electrode production line can be detected, jet printing marks at corresponding positions can be implemented, and the online real-time detection device can be better suitable for online real-time detection of the membrane electrode strip.

Description

Technical Field

[0001] This utility model relates to the technical field of membrane electrode detection, and in particular to a detection system for membrane electrode strips. Background Technology

[0002] As a clean energy source, fuel cells have demonstrated enormous application potential in numerous fields. The membrane electrode assembly (MEA), as a core component of a fuel cell, directly impacts its overall efficiency. With continuous technological advancements and the scaling up of the industry, MEA production is gradually shifting towards continuous and automated production lines to meet the growing market demand. In this continuous production model, the MEA has a strip-shaped structure, and the production process is characterized by high speed and continuity.

[0003] Currently, there is a lack of effective online testing methods for membrane electrode assemblies (MEAs) in fuel cells. During continuous production, due to the high speed of production lines and the special specifications of products, traditional testing methods struggle to perform real-time and accurate online testing of the strip-shaped MEAs. Utility Model Content

[0004] In view of the above-mentioned technical problems, the present invention provides a detection system for membrane electrode strips, which is applicable to online real-time detection in the production process of membrane electrode strips.

[0005] This utility model provides a detection system for membrane electrode strips, the system comprising:

[0006] The imaging device is installed on the membrane electrode production line; the imaging device is used to take pictures of the membrane electrode strip produced by the membrane electrode production line and output the inspection image of the membrane electrode strip to the outside world.

[0007] The inkjet printing device is installed on the membrane electrode production line; the inkjet printing device is located at a preset position downstream of the imaging device along the conveying direction of the membrane electrode strip.

[0008] The control terminal is connected to both the imaging device and the printing device. When the control terminal determines that there are surface defects in the membrane electrode strip based on the image to be inspected, it controls the printing device to print and mark the defect locations on the membrane electrode strip.

[0009] In one optional embodiment, the imaging device includes:

[0010] The first mounting bracket is installed on the membrane electrode production line;

[0011] The camera is mounted on the first mounting bracket;

[0012] A light source assembly is mounted on a first mounting frame and is used to provide supplemental lighting to the membrane electrode strip within the first mounting frame.

[0013] In one optional embodiment, the imaging device further includes:

[0014] Multiple light-transmitting plates are installed on the first mounting frame to form a detection space for the membrane electrode strip inside the first mounting frame.

[0015] In one alternative embodiment, the light source assembly includes:

[0016] The first light source is set perpendicular to the conveying direction of the membrane electrode strip and is located on one side of the membrane electrode strip. The length of the first light source is greater than the width of the membrane electrode strip.

[0017] The second light source is arranged parallel to the first light source and located on the other side of the membrane electrode strip, so that a transport channel for transporting the membrane electrode strip is formed between the first light source and the second light source.

[0018] In one alternative embodiment, the light source assembly further includes:

[0019] The light source control terminal is connected to both the first light source and the second light source, and is used to control the supplementary light brightness of the first light source and the second light source.

[0020] In one alternative embodiment, the printing apparatus includes:

[0021] At least one mounting base is provided in the membrane electrode production line;

[0022] The second mounting bracket connects to the mounting base;

[0023] At least one printing component is mounted on a second mounting bracket.

[0024] In one alternative embodiment, the printing assembly consists of two sets, mirror-arranged along the centerline of the membrane electrode strip.

[0025] In one alternative embodiment, the printing assembly includes:

[0026] The printhead is mounted on the mounting plate of the second mounting bracket;

[0027] The inkjet printing configuration terminal is connected to the printhead and is mounted on the second mounting bracket.

[0028] In an optional embodiment, the system further includes:

[0029] A metering device is installed on the membrane electrode production line and is connected to the control terminal. The metering device is used to measure the length of the membrane electrode strip between the imaging device and the printing device.

[0030] In one optional embodiment, the metering device includes:

[0031] The encoder is connected to the control terminal. The encoder is set close to the work roller of the film electrode production line. The encoder is used to output a pulse signal that characterizes the length of the film electrode strip to the control terminal under the drive of the work roller.

[0032] The third mounting bracket is set on the roller seat of the work roll and is connected to the encoder.

[0033] Compared with the prior art, the detection system for membrane electrode strips of this invention has the following advantages:

[0034] The detection system of this utility model includes an imaging device, a printing device, and a control terminal. Both the imaging device and the printing device are installed on the membrane electrode production line. The imaging device is used to photograph the membrane electrode strips produced on the production line and output the images of the membrane electrode strips to be inspected. The printing device is located at a preset position downstream of the imaging device along the conveying direction of the membrane electrode strips. During the production process of the membrane electrode, when the control terminal determines that there are surface defects in the membrane electrode strips based on the images to be inspected, it controls the printing device to print marks on the defect locations of the membrane electrode strips. The technical solution of this utility model can detect the membrane electrode strips produced on the membrane electrode production line and implement corresponding position printing marks, making it well-suited for online real-time detection of membrane electrode strips. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the structure of the membrane electrode strip detection system provided in this embodiment of the utility model;

[0037] Figure 2 A schematic diagram of the imaging device provided in the embodiment of this utility model;

[0038] Figure 3 This is a schematic diagram of the printing device provided in an embodiment of the present utility model;

[0039] Figure 4 A schematic diagram of the metering device provided in an embodiment of this utility model.

[0040] Explanation of reference numerals in the attached drawings: 1-Illuminating device, 2-Printing device, 3-Metering device, 4-Membrane electrode strip, 5-Working roller, 6-Roller seat, 7-Control terminal;

[0041] 11-First mounting bracket, 12-Camera, 13-Light source assembly, 14-Light-transmitting plate, 15-First light source, 16-Second light source, 17-Conveying channel;

[0042] 21-Mounting base, 22-Second mounting bracket, 23-Printing assembly, 24-Printing head, 25-Mounting plate, 26-Printing configuration terminal;

[0043] 31-Encoder, 32-Third mounting bracket. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the embodiments of the present utility model.

[0045] Please see Figure 1 , Figure 1 This is a schematic diagram of a membrane electrode strip inspection system provided in an embodiment of the present invention. The inspection system includes an imaging device 1, a printing device 2, and a control terminal 7. The control terminal 7 can be a computer device, such as an industrial control computer. The control terminal 7 is connected to both the imaging device 1 and the printing device 2. When the imaging device 1 determines that there are surface defects in the membrane electrode strip, the control terminal 7 controls the printing device 2 to print marks on the defect locations of the membrane electrode strip.

[0046] It should be noted that the defect location printed by the printing device 2 can be either the lateral fixed position of the membrane electrode strip or the location corresponding to a defect in the strip. This facilitates subsequent identification and handling of defects in the membrane electrode strip by inspection personnel. Specific defects include pinholes, coating peeling, etc.

[0047] Please see Figure 2 , Figure 2 This is a schematic diagram of the imaging device 1. The imaging device 1 can be a line scan camera installed on the membrane electrode production line, or other equipment capable of image capture. The imaging device 1 is installed on the membrane electrode production line and is used to take pictures of the membrane electrode strip 4 produced by the membrane electrode production line and output the image of the membrane electrode strip 4 to be inspected.

[0048] It is understandable that photographing the membrane electrode strip 4 can be performed in either static or dynamic conditions. For example, when static photography is required, the conveying system on the membrane electrode production line can be designed as segmented, with each segment controlled by an independent drive unit. When the position of the imaging device 1 needs to be temporarily stopped, a stop command can be sent to the drive unit of that segment individually through the control system, while other segments continue to operate. When that segment is stopped, the imaging device 1 takes a picture of the membrane electrode strip 4 in that segment, and static photography can obtain high image quality. When dynamic photography is required, a camera with high-speed shooting capabilities should be selected, such as a high-speed CMOS camera or a CCD camera. These cameras can complete multiple exposures in a short time to capture instantaneous images of the membrane electrode strip 4 during its movement. At the same time, the camera needs to have high resolution and high frame rate to ensure that the captured images are clear, rich in detail, and able to keep up with the movement speed of the membrane electrode strip 4.

[0049] For example, please continue reading Figure 2 The shooting device 1 includes a first mounting bracket 11, a camera 12, and a light source assembly 13.

[0050] The first mounting frame 11 is installed on the membrane electrode production line. The first mounting frame 11 can be composed of multiple aluminum profiles spliced ​​together, or welded profiles to form a rectangular body. An inspection space for the membrane electrode strip 4 is formed inside the first mounting frame 11. A camera 12 is mounted on the first mounting frame 11, located inside the inspection space. The camera 12 can be suspended above the membrane electrode strip 4 so that it can take a top-down image of the membrane electrode strip 4. A light source assembly 13 is installed on the first mounting frame 11. The light source assembly 13 is used to supplement the illumination of the membrane electrode strip 4 within the first mounting frame 11, improving the image quality. The light source assembly 13 can be a long strip light source, positioned above the membrane electrode strip 4 to supplement the illumination of the membrane electrode material at the location captured by the camera.

[0051] In practical applications, dust and other contaminants in the membrane electrode production line workshop may enter the field of view of the imaging device 1, affecting the image quality. Therefore, in one specific embodiment, the imaging device 1 further includes multiple light-transmitting plates 14.

[0052] Multiple light-transmitting plates 14 are installed on the first mounting frame 11 to form a detection space for the membrane electrode strip 4 inside the first mounting frame 11. The light-transmitting plates 14 can be acrylic sheets or tempered glass, and are installed on the top and sides of the first mounting frame 11, with a reserved transport channel 17 for the membrane electrode strip 4. The enclosed detection space can prevent dust, particles and other contaminants in the workshop from affecting the camera's field of view, while also protecting the camera.

[0053] Furthermore, the light source assembly 13 includes a first light source 15 and a second light source 16, both of which are elongated light sources capable of fully covering the transverse range of the strip. The first light source 15 is positioned perpendicular to the conveying direction of the membrane electrode strip 4 and is located on one side of the membrane electrode strip 4, with the length of the first light source 15 being greater than the width of the membrane electrode strip 4. The second light source 16 is positioned parallel to the first light source 15 and is located on the other side of the membrane electrode strip 4, so that a conveying channel 17 for conveying the membrane electrode strip 4 is formed between the first light source 15 and the second light source 16.

[0054] It is understandable that the first light source 15 can provide supplementary lighting to the upper surface of the membrane electrode strip 4, thereby improving the imaging quality of the membrane electrode surface texture; the second light source 16 illuminates upwards from the reverse side of the membrane electrode strip 4, penetrating the multi-layer structure of the membrane electrode and clearly revealing light-transmitting defects such as pinholes, delamination, and bubbles.

[0055] To improve the quality of supplemental lighting, the light source assembly 13 also includes a light source control terminal. The light source control terminal is connected to both the first light source 15 and the second light source 16, and is used to control the supplemental lighting brightness of the first light source 15 and the second light source 16. The light source control terminal can be a DC adjustable power supply, configured with multiple output ports connected to the first light source 15 and the second light source 16 respectively, allowing adjustment of the illumination brightness of the first light source 15 and the second light source 16 through settings on the light source control terminal.

[0056] The structure of the printing device 2 will be described in detail below. Please refer to [link / reference]. Figure 2 , Figure 2 This is a schematic diagram of the printing device 2. The printing device 2 is installed on the membrane electrode production line; the printing device 2 is located at a preset position downstream of the imaging device 1 along the conveying direction of the membrane electrode strip 4. The printing device 2 can be configured as a high-pressure spray gun, which sprays ink onto the membrane electrode strip 4 under the action of compressed air; of course, it can also be configured as other equipment capable of printing markings.

[0057] For example, the printing apparatus 2 includes a second mounting bracket 22, at least one mounting base 21, and at least one printing assembly 23. See also... Figure 3 , Figure 3 This is a schematic diagram of the printing device 2. In this embodiment of the invention, two mounting bases 21 are included, both disposed on the membrane electrode production line. The mounting bases 21 can be mounted on the main body of the membrane electrode production line or on a workshop wall. A second mounting bracket 22 is connected to the mounting bases 21, as shown below. Figure 3 As shown, the second mounting frame 22 can be constructed by splicing multiple crossbars and longitudinal bars, which are fixed by clamping members to ensure a stable connection. The printing assembly 23 is mounted on the second mounting frame 22 and can be fixedly installed in a preset position on the second mounting frame 22 by bolts, enabling it to print markings on the membrane electrode strip 4.

[0058] When using only a single-sided printing component 23 for online inspection, it may be impossible to achieve clear and complete marking from a single angle for some defects with complex shapes or special locations. Especially for defects near the edges or in complex structural areas on the membrane electrode strip 4, single-sided printing is prone to incomplete coverage and poor clarity, affecting subsequent defect identification and processing. Therefore, in one specific embodiment, the printing components 23 are arranged in two sets, mirror-imaged along the center line of the membrane electrode strip 4. This layout allows any part of the membrane electrode strip 4 to receive printed marks simultaneously from two opposite directions. For example, when a defect near the left edge appears on the membrane electrode strip 4, the left printing component 23 can directly mark it, while the right-side mirror-image printing component 23 can also mark the corresponding position of the defect symmetrically, ensuring comprehensive and accurate marking.

[0059] For example, the printing assembly 23 includes a printhead 24 and a print configuration terminal 26. The printhead 24 is mounted on the mounting plate 25 of the second mounting bracket 22; the print configuration terminal 26 is connected to the printhead 24 and is mounted on the second mounting bracket 22. The print configuration terminal 26 can be configured as a controller including a touch screen, with an intuitive operating interface, allowing on-site inspection personnel to quickly adjust various parameters of the printhead 24, such as printing pressure and ink flow rate, through touch operation.

[0060] The printing configuration terminal 26 can precisely control the amount of marking material ejected from the printhead 24, ensuring that the markings on the membrane electrode strip 4 are uniform in thickness and density. Whether it is fine marking of tiny defects or clear identification of large-area defects, high precision requirements can be met, improving the quality and accuracy of marking and providing a reliable basis for subsequent defect processing.

[0061] Because membrane electrode production lines are often long and multi-layered, the spatial arrangement of these lines may limit the ability to install the imaging device 1 and the printing device 2 adjacent to each other. If a distance exists between the imaging device 1 and the printing device 2, and length measurement between them is not performed, the defect location detected by the imaging device 1 may deviate from the printing location of the printing device 2. Therefore, in one specific embodiment, the detection system further includes a measuring device 3.

[0062] Metering device 3 is installed on the membrane electrode production line and connected to the control terminal. Metering device 3 measures the length of the membrane electrode strip 4 between the imaging device 1 and the printing device 2. Metering device 3 can be configured according to actual needs; for example, a speed sensor can be installed on the membrane electrode production line between the imaging device 1 and the printing device 2. The speed sensor detects the movement speed of the membrane electrode strip 4, and the integral of the movement speed over the detection time is the measured length of the membrane electrode strip 4. The installation distance between the imaging device 1 and the printing device 2 can be determined by prior measurement and recorded as the actual distance. When the length of the membrane electrode strip 4 measured by the speed sensor equals the actual distance, the printing device 2 is controlled to perform printing.

[0063] Please see Figure 4 , Figure 4 This is a schematic diagram of the metering device 3. The metering device 3 includes an encoder 31 and a third mounting bracket 32.

[0064] Encoder 31 is connected to the control terminal and is positioned close to the work roller 5 of the film electrode production line. Encoder 31 outputs a pulse signal representing the length of the film electrode strip 4 to the control terminal under the drive of the work roller 5. A third mounting bracket 32 ​​is mounted on the roller seat 6 of the work roller 5 and is connected to encoder 31. Rubber material can be wrapped around the outer periphery of encoder 31. A spring is installed on the third mounting bracket 32, which pulls the rubber material to adhere tightly to the work roller 5. Driven by the work roller 5, encoder 31 rotates along with it. The control terminal determines the measurement length based on the pulse signal output by encoder 31.

[0065] The technical solution provided in this embodiment of the utility model has at least the following technical effects or advantages:

[0066] The inspection system includes an imaging device, a printing device, and a control terminal. Both the imaging and printing devices are located on the membrane electrode production line. The imaging device photographs the membrane electrode strips produced on the production line and outputs the images of the strips to be inspected. The printing device is located at a preset position downstream of the imaging device along the conveying direction of the membrane electrode strips. During the production process, the control terminal can determine, based on the images to be inspected, that surface defects exist in the membrane electrode strips and control the printing device to mark the defect locations. This invention can inspect the membrane electrode strips produced on the production line and implement corresponding markings, making it well-suited for online real-time inspection of membrane electrode strips.

[0067] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0068] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0069] In this application, unless otherwise expressly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0070] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

Claims

1. A system for detecting a membrane electrode assembly tape, characterized by, The system includes: An imaging device is installed on the membrane electrode production line; the imaging device is used to take pictures of the membrane electrode strip produced by the membrane electrode production line and output the image of the membrane electrode strip to be inspected. A printing device is installed on the membrane electrode production line; the printing device is located at a preset position downstream of the imaging device along the conveying direction of the membrane electrode strip; A control terminal is connected to both the imaging device and the printing device; the control terminal is used to control the printing device to print marks on the defect location of the membrane electrode strip when it is determined from the image to be inspected that the membrane electrode strip has surface defects. The system also includes: A metering device is installed on the membrane electrode production line and is connected to the control terminal; the metering device is used to measure the length of the membrane electrode strip between the imaging device and the printing device. The metering device includes: An encoder is connected to the control terminal. The encoder is set close to the work roller of the membrane electrode production line. The encoder is used to output a pulse signal representing the length of the membrane electrode strip to the control terminal under the drive of the work roller. The third mounting bracket is disposed on the roller seat of the work roller and is connected to the encoder.

2. The detection system for membrane electrode strips according to claim 1, characterized in that, The imaging device includes: The first mounting bracket is disposed on the membrane electrode production line; The camera is mounted on the first mounting bracket; A light source assembly is mounted on the first mounting frame, and the light source assembly is used to provide supplemental lighting to the membrane electrode strip within the first mounting frame.

3. The membrane electrode assembly strip testing system of claim 2, wherein, The imaging device also includes: Multiple light-transmitting plates are installed on the first mounting frame so that the interior of the first mounting frame forms the detection space for the membrane electrode strip.

4. The membrane electrode assembly strip testing system of claim 2, wherein, The light source assembly includes: A first light source is disposed perpendicular to the conveying direction of the membrane electrode strip and located on one side of the membrane electrode strip. The length of the first light source is greater than the width of the membrane electrode strip. The second light source is arranged parallel to the first light source and located on the other side of the membrane electrode strip, so that a transport channel for transporting the membrane electrode strip is formed between the first light source and the second light source.

5. The membrane electrode assembly strip testing system of claim 4, wherein, The light source assembly also includes: A light source control terminal is connected to both the first light source and the second light source, and the light source control terminal is used to control the supplementary light brightness of the first light source and the second light source.

6. The detection system for membrane electrode strips according to claim 1, characterized in that, The printing device includes: At least one mounting base is provided in the membrane electrode production line; The second mounting bracket is connected to the mounting base; At least one printing component is mounted on the second mounting bracket.

7. The detection system for membrane electrode strips according to claim 6, characterized in that, The printing assembly consists of two sets, which are mirror-arranged along the center line of the length of the membrane electrode strip.

8. The membrane electrode assembly strip testing system of claim 6, wherein, The printing assembly includes: The printhead is mounted on the mounting plate of the second mounting bracket; A printing configuration terminal is connected to the printing head and is mounted on the second mounting bracket.

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