Hydrogen fuel membrane electrode detection device and processing equipment

Abstract

The application relates to the field of membrane electrode processing and optical detection, in particular to a hydrogen fuel membrane electrode detection device and processing equipment, the detection device comprising a rack and a supporting roller rotatably arranged on the rack; a calibration groove is arranged on the supporting roller, the calibration groove is not covered by a battery membrane, and the calibration groove has a preset reference depth; a mounting frame is arranged above the rack; a line laser emitter and a visual recognition unit are further arranged on the mounting frame; by adopting the optical non-contact measurement architecture of the line laser emitter and the visual recognition unit, the risk of scratching the fragile battery membrane caused by the traditional mechanical probe or the ball is excluded. Meanwhile, the stepped calibration groove with the reference depth is arranged on the supporting roller and serves as the intrinsic reference which does not move with any external mechanism. The problem of the measurement scale drift is overcome, and continuous high-precision absolute thickness conversion is realized.

Description

Technical Field

[0001] This invention relates to the field of membrane electrode processing and optical inspection technology, specifically to a hydrogen fuel membrane electrode inspection device and processing equipment. Background Technology

[0002] In the production process of hydrogen fuel cells, the membrane electrode assembly (MEA) is the core power generation component. The quality of the battery membrane substrate, such as the proton exchange membrane (PEM) or catalyst coated membrane (CCM), which serves as its core substrate, directly determines the final performance and lifespan of the MEA. In the pre-production processes of the MEA (such as substrate calendering or catalyst coating for CCM preparation), the battery membrane substrate is prone to microscopic springback or deformation due to the release of residual stress within the material or changes in coating tension, resulting in inconsistent thickness. This thickness tolerance directly leads to uneven stress during subsequent hot-pressing of the MEA, severely reducing the yield of the finished product. To address the issue of uneven thickness in the battery membrane substrate, existing testing methods typically employ mechanical contact methods. For example, Chinese Patent Publication No. CN119058000B discloses a hydrogen fuel cell membrane preparation device and method. This method uses a plastic roller; when the battery membrane exhibits springback, the membrane pushes the plastic roller to rotate, which in turn rotates a conductive rod. If the rebound value exceeds the set value, the conductive rod will contact the conductive cylinder, thereby activating the warning light and speaker to issue an alarm. However, this traditional contact-based mechanical detection solution has limitations in actual high-standard industrial production. Whether it is an extremely thin proton exchange membrane or a CCM coated with a catalyst layer, the materials are extremely fragile and the surface is extremely sensitive. Using a plastic ball to make direct physical rolling contact with the high-speed moving battery membrane can easily leave scratches on the membrane surface, causing catalyst to fall off or introducing external contamination, which fundamentally damages the molding quality of the membrane electrode substrate. Moreover, the long-term wear of the mechanical spring and contacts, as well as the thermal expansion and contraction caused by the operation of the heating roller, will cause serious drift of the mechanical reference, making the measurement reference line inaccurate and prone to false alarms. Furthermore, this solution is essentially a mechanical limit switch, which can only alarm when the threshold is exceeded, and cannot continuously output high-precision thickness values. In addition, the discrete point arrangement cannot cover the entire width of the membrane, resulting in a huge detection blind zone. Summary of the Invention

[0003] To address the aforementioned issues, a hydrogen fuel cell membrane electrode testing device and processing equipment are provided. By employing an optical non-contact measurement architecture using a line laser emitter and a vision recognition unit, the risk of scratching the fragile battery membrane caused by traditional mechanical probes or rolling balls is eliminated. Simultaneously, a stepped calibration groove with a reference depth is created on the support roller, serving as an intrinsic reference that does not move with any external mechanism. This overcomes the measurement scale drift problem and achieves continuous, high-precision absolute thickness conversion.

[0004] To address the problems of existing technologies, this invention provides a hydrogen fuel cell membrane electrode detection device, comprising a frame and a support roller rotatably mounted on the frame; a stepped calibration groove is formed on the outer circumferential surface of at least one end of the support roller, the calibration groove is not covered by the battery membrane, and the calibration groove has a preset reference depth; a mounting frame is disposed above the frame; a line laser emitter is obliquely mounted on the mounting frame for emitting a line laser onto the surface of the support roller, and in the initial detection position, the projection range of the line laser simultaneously spans the edge of the battery membrane and the calibration groove; a visual recognition unit is vertically mounted on the mounting frame, and its field of view center coincides with the projection area of ​​the line laser on the support roller; the visual recognition unit can acquire the image of the line laser projected onto the battery membrane and the calibration groove, and perform pixel equivalent calibration on the image based on the reference depth of the calibration groove, and calculate the thickness of the battery membrane using this pixel equivalent.

[0005] Preferably, the visual recognition unit includes an industrial camera and a telecentric lens connected to the bottom of the industrial camera; the optical axis of the telecentric lens is perpendicular to the central axis of the support roller.

[0006] Preferably, an air knife assembly is provided on the mounting bracket below the telecentric lens and the line laser emitter, and the air outlet direction of the air knife assembly is perpendicular to the optical axis of the telecentric lens.

[0007] Preferably, the air knife assembly has a pressure stabilizing chamber inside, and the air outlet has a slit-like structure.

[0008] Preferably, the calibration groove is a multi-level stepped annular groove, the annular groove containing at least two concentric bottom surfaces with different reference depths, so as to provide a multi-segment linear pixel equivalent calibration reference for the visual recognition unit.

[0009] Preferably, a support frame is provided above the frame, and a linear guide rail extending along the axis of the support roller is provided on the support frame; the mounting frame is slidably mounted on the linear guide rail, and a drive module for driving the mounting frame to move laterally and reciprocally along the linear guide rail is also provided on the support frame.

[0010] Preferably, the calibration grooves not covered by the battery film are provided on the outer peripheral surfaces of both ends of the support roller; the mounting frame can be driven by the drive module to one end of the support roller to perform pixel equivalent calibration, and slide to the middle region of the support roller to perform continuous area array thickness measurement of the battery film while maintaining the pixel equivalent.

[0011] Preferably, the visual recognition unit is further configured to extract the pixel coordinates of the step breakpoint formed by the line laser when it crosses the edge of the battery film and the surface of the support roller, and synchronously calculate and output the real-time physical width and lateral offset of the battery film based on the pixel coordinates of the step breakpoint.

[0012] Preferably, both the air knife assembly and the line laser emitter are connected to the mounting bracket via a fine-tuning mechanism, which is used to adjust the angles of the air knife assembly and the line laser emitter.

[0013] A hydrogen fuel membrane electrode processing device includes the aforementioned hydrogen fuel membrane electrode detection device.

[0014] The advantages of this invention compared to the prior art are: 1. This invention employs an optical non-contact measurement architecture combining a line laser emitter and a vision recognition unit, eliminating the risk of scratching the fragile battery film caused by traditional mechanical probes or rolling balls. Simultaneously, a stepped calibration groove with a reference depth is created on the support roller, serving as an intrinsic reference that does not move with any external mechanism. By simultaneously capturing laser tomographic images of the battery film and this calibration groove, the system can calculate the pixel equivalent in real time under the current environment, overcoming the measurement scale drift problem caused by frame thermal expansion and contraction or lens aging, and achieving high-precision absolute thickness conversion over long periods.

[0015] 2. This invention effectively eliminates perspective distortion caused by changes in the distance to the object being measured in ordinary lenses by employing a telecentric lens in the visual recognition unit and positioning its optical axis perpendicular to the central axis of the support roller. Even under the unavoidable high-frequency mechanical vibrations of the processing equipment, and despite the microscopic up-and-down movement of the support roller, the magnification of the image captured by the telecentric lens of the calibration groove and the battery film remains constant.

[0016] 3. This invention adds an air knife assembly to the mounting frame, with its air outlet direction intersecting the optical axis of the telecentric lens. This creates an invisible horizontal laminar flow air shield between the telecentric lens and the heated support roller below. This air shield forcibly blocks the irregular turbulent flow of rising hot air below, preventing refractive index distortion caused by light passing through a high-temperature gradient. This ensures that the line laser's optical path and the lens's imaging optical path are always in a uniform and stable medium, effectively guaranteeing recognition accuracy and stability under the harsh high-temperature conditions of the processing equipment. Attached Figure Description

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a hydrogen fuel membrane electrode detection device in operation. Figure 1 .

[0018] Figure 2 A schematic diagram of the three-dimensional structure of a hydrogen fuel membrane electrode detection device in operation. Figure 2 .

[0019] Figure 3 This is a top view of a hydrogen fuel membrane electrode detection device in operation.

[0020] Figure 4 This is a schematic cross-sectional view of a hydrogen fuel membrane electrode detection device during operation.

[0021] Figure 5 This is a three-dimensional structural diagram of the support roller and visual recognition unit in a hydrogen fuel membrane electrode detection device.

[0022] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0023] Figure 7 This is a three-dimensional structural diagram of a hydrogen fuel membrane electrode testing device, comprising a mounting frame, a line laser emitter, a vision recognition unit, and an air knife assembly. Figure 1 .

[0024] Figure 8 This is a three-dimensional structural diagram of a hydrogen fuel membrane electrode testing device, comprising a mounting frame, a line laser emitter, a vision recognition unit, and an air knife assembly. Figure 2 .

[0025] Figure 9 yes Figure 8 Enlarged view of point B in the middle.

[0026] Figure 10 This is a three-dimensional structural diagram of a hydrogen fuel membrane electrode detection device.

[0027] The following are the labels in the diagram: 1. Frame; 11. Support roller; 111. Calibration slot; 12. Mounting frame; 121. Line laser emitter; 122. Vision recognition unit; 1221. Industrial camera; 1222. Telecentric lens; 123. Air knife assembly; 124. Fine-tuning mechanism; 13. Support frame; 131. Linear guide rail; 132. Drive module; 2. Battery film. Detailed Implementation

[0028] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 6As shown: A hydrogen fuel cell membrane electrode detection device includes a frame 1 and a support roller 11 rotatably mounted on the frame 1; a stepped calibration groove 111 is formed on the outer peripheral surface of at least one end of the support roller 11, the calibration groove 111 is not covered by the battery membrane 2, and the calibration groove 111 has a preset reference depth; a mounting frame 12 is disposed above the frame 1; a line laser emitter 121 is obliquely mounted on the mounting frame 12 for emitting a line laser onto the surface of the support roller 11, and in the initial detection position... The projection range of the line laser spans both the edge of the battery film 2 and the calibration groove 111. The visual recognition unit 122 is vertically mounted on the mounting frame 12, and its field of view coincides with the projection area of ​​the line laser on the support roller 11. The visual recognition unit 122 can acquire the image of the line laser projected onto the battery film 2 and the calibration groove 111, and perform pixel equivalent calibration on the image based on the reference depth of the calibration groove 111, and calculate the thickness of the battery film 2 based on this pixel equivalent.

[0030] In the conventional calendering and forming process of hydrogen fuel cell membrane 2, the membrane material usually exhibits microscopic thickness rebound after detaching from the roller assembly. Due to the extreme fragility and surface sensitivity of the membrane 2 material, traditional mechanical contact probes are easily scratched. Furthermore, conventional optical non-contact measurement methods, when faced with long-term alternating day and night temperatures in the workshop, experience thermal expansion and contraction of the camera's support bracket, and focal length drift in the lens, causing the system to misinterpret the microscopic deformation of the support bracket as a change in membrane thickness, resulting in severe measurement zero-point drift. To overcome these technical problems, a main body including a frame 1 and a support roller 11 rotatably mounted on the frame 1 is constructed. During operation, the support roller 11 acts as a physical substrate, supporting and synchronously transporting the battery membrane 2. A mounting frame 12 is suspended above the frame 1, on which are arranged a tilted line laser emitter 121 and a vertically oriented visual recognition unit 122. This solution precisely machines a stepped calibration groove 111 on the outer circumferential surface of at least one end of the support roller 11, making it an intrinsic reference with the same temperature and frequency as the detection environment. To further enhance the stability of the reference, the calibration groove 111 can be directly machined onto the surface of the support roller 11, or it can be achieved by inserting a stepped ring made of a low coefficient of thermal expansion alloy, such as Invar alloy, into the roller end. At the initial detection position, the tilted line laser can simultaneously cross the edge of the battery film 2 and the calibration groove 111. Since the calibration groove 111 is not covered by the battery film 2 and has an extremely precise preset reference depth, after the visual recognition unit 122 acquires the projected image of this area, the algorithm layer will extract the step breakpoints generated by the line laser at the upper and lower edges of the stepped calibration groove 111 and calculate the pixel difference ΔP it occupies in the image. 基准 Combined with the absolutely known reference depth H of calibration slot 111 基准 The system calculates the current pixel equivalent K=H基准 / ΔP 基准 This refers to the actual physical size represented by a single pixel. Subsequently, the system extracts the pixel coordinates Y on the surface of battery film 2. 膜 Pixel coordinate Y of the reference plane of support roller 11 辊 Through the formula T=(Y 膜 -Y 辊 The precise thickness is calculated by multiplying K by 11. During this calculation, the system can also locate the center of the laser stripe using a sub-pixel centroid extraction algorithm to further compensate for the physical pixel gap. This configuration, which integrates the physical reference into the support roller 11, enables the system to perform in-situ self-calibration each time it reaches the initial detection position at the end. Through periodic scale refresh, the long-term interference of environmental temperature drift and equipment aging on measurement accuracy is significantly reduced.

[0031] The line laser emitter 121 can be a semiconductor laser generator with an integrated Powell prism or cylindrical lens. Such optical lenses can uniformly stretch the Gaussian laser beam into a fan-shaped light band with uniform energy distribution and no significant attenuation at either end. For the semi-transparent polymer hydrogen fuel cell membrane 2, the line laser emitter 121 should preferably use a short-wavelength blue laser module, such as the 405nm or 450nm band; compared to conventional red light, blue light has lower transmittance within the semi-transparent membrane layer, enabling the formation of a clearer and sharper diffuse reflection light band on the membrane surface, which helps improve the feature extraction accuracy of the visual recognition unit 122.

[0032] Furthermore, existing optical thickness measurement solutions mostly employ point-like laser displacement sensors or confocal sensors. These point-like sensors can only form a single discrete detection point on the film surface. For battery films 2, which are produced continuously at high speeds with a large width, point-like detection suffers from a significant data blind zone, failing to capture the lateral thickness profile of the film material. If multiple sets of point-like sensors are densely arranged, not only is the hardware cost high, but adjacent light points are also prone to cross-optical interference. Introducing a line laser emitter 121 transforms traditional single-point measurement into linear array profile measurement, allowing the acquisition of a continuous surface morphology feature in a single irradiation, improving the coverage and detection efficiency of a single sampling. Simultaneously, the wide-width line beam is a physical prerequisite for the light to simultaneously traverse both the film-free reference area and the film-covered measurement area.

[0033] It should be noted that the accompanying drawings of this invention are only partial structural schematic diagrams of the overall device. To clearly and intuitively highlight the core architecture and opto-mechanical-electronic synergistic logic of the hydrogen fuel cell electrode detection device in this invention, other conventional components in the overall hydrogen fuel cell electrode processing equipment (such as the preceding calendering assembly, the subsequent winding / guiding mechanism, the main control cabinet, and the external safety shield, etc.) are omitted in the drawings. Those skilled in the art should understand that the above-described partial simplification for the sake of visual simplicity does not constitute a limitation on the actual structure and scope of protection of the overall device of this invention.

[0034] like Figures 1 to 5 , Figure 7 , Figure 8 and Figure 10 As shown: The visual recognition unit 122 includes an industrial camera 1221 and a telecentric lens 1222 connected to the bottom of the industrial camera 1221; the optical axis of the telecentric lens 1222 is perpendicular to the central axis of the support roller 11.

[0035] To ensure the rigor and reliability of the aforementioned pixel equivalent conversion, the visual recognition unit 122 includes an industrial camera 1221, such as a CMOS industrial area scan camera, a CCD line scan camera, or a high-speed global shutter camera, and a telecentric lens 1222 connected to the bottom of the industrial camera 1221. Ordinary industrial lenses suffer from perspective distortion; when the support roller 11 moves up and down at high speed, the image scale of the measured object's surface will scale accordingly. However, the optical path of the telecentric lens 1222 ensures that its optical axis is always perpendicular to the central axis of the support roller 11, effectively eliminating perspective errors where near objects appear larger than distant ones. Even if the support roller 11 experiences micron-level mechanical vibrations, the magnification of the projected image within the visual recognition unit 122 remains highly consistent, providing a stable optical base for sub-micron-level thickness calculations.

[0036] like Figures 3 to 5 , Figures 7 to 9 As shown: An air knife assembly 123 is provided on the mounting bracket 12 below the telecentric lens 1222 and the line laser emitter 121. The air outlet direction of the air knife assembly 123 is perpendicular to the optical axis of the telecentric lens 1222.

[0037] like Figures 3 to 5 , Figures 7 to 9 As shown: The air knife assembly 123 has a pressure stabilizing chamber inside, and the air outlet is a slit-shaped structure.

[0038] When dealing with the high-temperature and harsh working conditions in the processing workshop, the high temperature emitted by the support roller 11 will form strong and irregular hot air convection on its surface. This uneven hot airflow will cause high-frequency refraction and distortion when the line laser penetrates, producing a mirage-like distortion effect, which seriously interferes with the clear imaging of the telecentric lens 1222. To address this, an air knife assembly 123 is installed on the mounting frame 12 below the vision recognition unit 122 and the line laser emitter 121. The air knife assembly 123 has a pressure stabilizing chamber (not shown in the figure) inside, and the air outlet has a slit-like structure. This hydrodynamic configuration can transform the turbulent air intake into a uniform and stable advection layer. The air outlet direction of the air knife assembly 123 is perpendicular to the center of the field of view of the vision recognition unit 122, so that the blown gas forms a horizontal transparent laminar air shield between the front end of the telecentric lens 1222 and the heated support roller 11. The air shield forcibly cuts off and carries away the rising vortex of hot air below, maintaining the constant refractive index of the medium through which the light path passes, and avoiding the high-frequency vibration of the battery film 2 that might be caused by the vertical downward blowing.

[0039] like Figures 3 to 6 As shown: The calibration groove 111 is a multi-level stepped annular groove, and the annular groove contains at least two concentric bottom surfaces with different reference depths, so as to provide a multi-segment linear pixel equivalent calibration reference for the visual recognition unit 122.

[0040] Building upon the basic in-situ calibration architecture, the calibration groove 111 is further optimized into a multi-level stepped annular groove to address potential nonlinear optical distortions during actual processing. This annular groove contains at least two concentric bottom surfaces with different reference depths, such as reference drop surfaces of 50 micrometers and 100 micrometers respectively. This multi-segment stepped structure provides the visual recognition unit 122 with multiple linear pixel equivalent calibration references, enabling the system to fit a more accurate depth conversion curve and improving measurement linearity over large thickness spans.

[0041] like Figures 1 to 4 and Figure 10 As shown: A support frame 13 is provided above the frame 1, and a linear guide rail 131 extending along the axis of the support roller 11 is provided on the support frame 13; the mounting frame 12 is slidably mounted on the linear guide rail 131, and a drive module 132 for driving the mounting frame 12 to move laterally and reciprocally along the linear guide rail 131 is also provided on the support frame 13.

[0042] To meet the industrial production requirements of wide hydrogen fuel cell membranes 2, single-point edge detection is insufficient to reflect the overall thickness uniformity of the membrane material. Therefore, a support frame 13 is added above the frame 1, and a linear guide rail 131 extending along the axis of the support roller 11 is provided on the support frame 13. The mounting frame 12 is slidably mounted on the linear guide rail 131, and the support frame 13 is also provided with a drive module 132 for driving the mounting frame 12 to move laterally and reciprocally along the linear guide rail 131, such as a servo motor screw module, a linear motor module, or a synchronous belt linear module. In conjunction with this cruise mechanism, calibration grooves 111 not covered by the battery membrane 2 are opened on the outer peripheral surfaces of both ends of the support roller 11. In the operation process, the mounting frame 12 can be driven by the drive module 132 to any end of the support roller 11 for pixel equivalent calibration. After completing the self-calibration of the reference scale, the vision recognition unit 122, while maintaining the pixel equivalent, smoothly slides with the mounting frame 12 to the middle area of ​​the support roller 11 to perform continuous area array thickness measurement of the battery film 2. This action logic of end sampling calibration and middle cruise scanning takes into account both the high precision of static calibration and the large coverage of dynamic scanning.

[0043] It should be noted that the sliding cruise scheme using linear guide rail 131 and drive module 132 can achieve full-coverage sampling inspection or periodic area scanning of wide-width film materials with relatively low hardware costs. In other embodiments of ultra-high-speed production lines with extremely high real-time requirements, the aforementioned drive module 132 can be omitted, and instead, multiple visual recognition units 122 and line laser emitters 121 arrays can be fixedly arranged on the support frame 13 along the axis of the support roller 11. The fields of view edges of adjacent visual recognition units 122 overlap appropriately, and the visual recognition units 122 at both ends are aligned with the calibration grooves 111 on both sides of the support roller 11. Through the splicing and fusion of multi-channel visual data, real-time full inspection of the entire width of the battery film 2 can be achieved without any mechanical reciprocating motion. In this array-type embodiment, the visual recognition units 122 located at both ends can continuously capture images of the calibration slot 111 to achieve uninterrupted, absolute real-time in-situ self-calibration, and synchronously transmit the real-time refreshed pixel equivalent to other visual recognition units 122 located in the middle, thereby completely eliminating any sudden deformation or temperature drift error under ultra-high-speed operating conditions.

[0044] like Figures 1 to 6 and Figure 10 As shown: the calibration grooves 111 not covered by the battery film 2 are opened on the outer peripheral surfaces of both ends of the support roller 11; the mounting frame 12 can be driven by the drive module 132 to one end of the support roller 11 to perform pixel equivalent calibration, and slide to the middle area of ​​the support roller 11 to perform continuous area array thickness measurement of the battery film 2 while maintaining the pixel equivalent.

[0045] Setting a calibration groove 111 at at least one end is sufficient to meet the basic computational requirements for establishing a single-point pixel equivalent reference in the system. However, in wide-format processing equipment, the support roller 11 may experience microscopic bending deformation in the middle of its shaft section under its own weight and calendering tension, and uneven temperature distribution on the roller surface can also lead to microscopic differences in thermal expansion. Therefore, in a preferred embodiment, calibration grooves 111 are provided at both ends of the support roller 11. The system can simultaneously extract the pixel equivalent of the calibration grooves 111 at both ends to establish a linear interpolation reference line spanning the width of the support roller 11 at the software level, thereby compensating for the lateral spatial error caused by the slight bending of the roller shaft.

[0046] like Figures 1 to 6 and Figure 10 As shown: The visual recognition unit 122 is also used to extract the pixel coordinates of the step breakpoint formed when the line laser crosses the edge of the battery film 2 and the surface of the support roller 11, and synchronously calculate and output the real-time physical width and lateral offset of the battery film 2 based on the pixel coordinates of the step breakpoint.

[0047] Furthermore, the geometric layout of the line laser spanning the irradiation is not only used for thickness calculation, but the visual recognition unit 122 is also used to extract the pixel coordinates of the step breakpoint formed when the line laser crosses the edge of the battery film 2 and the metal surface of the support roller 11. Since the breakpoint position characterizes the physical boundary of the material, the system can simultaneously calculate and output the real-time physical width and lateral offset of the battery film 2 based on the pixel coordinates of the step breakpoint, thereby realizing multi-dimensional composite detection of thickness measurement, width measurement, and correction signal capture without adding any additional hardware probes.

[0048] like Figure 2 , Figure 4 , Figures 7 to 9 As shown: The air knife assembly 123 and the line laser emitter 121 are both connected to the mounting bracket 12 via a fine-tuning mechanism 124, which is used to adjust the angles of the air knife assembly 123 and the line laser emitter 121.

[0049] To further optimize the incident angle of the optical path and ensure precise coverage of the core field of view by the laminar flow air shield, both the air knife assembly 123 and the line laser emitter 121 are connected to the mounting bracket 12 via a fine-tuning mechanism 124. The fine-tuning mechanism 124, such as a worm gear adjusting seat, a micrometer differential head, or a damped rotating shaft with a dial, can achieve multi-degree-of-freedom angle fine-tuning, ensuring that the triangular reflection tilt angle of the line laser reaches the optimal signal-to-noise ratio.

[0050] A hydrogen fuel membrane electrode processing device includes the aforementioned hydrogen fuel membrane electrode detection device.

[0051] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A hydrogen fuel membrane electrode detection device, comprising a frame (1) and a support roller (11) rotatably disposed on the frame (1). Its features are, The support roller (11) has a stepped calibration groove (111) on the outer peripheral surface of at least one end. The calibration groove (111) is not covered by the battery film (2) and has a preset reference depth. Mounting bracket (12) is disposed above the frame (1); A line laser emitter (121) is mounted at an angle on the mounting frame (12) for emitting a line laser onto the surface of the support roller (11), and at the initial detection position, the projection range of the line laser simultaneously spans the edge of the battery film (2) and the calibration groove (111). The visual recognition unit (122) is vertically mounted on the mounting frame (12), and its field of view center coincides with the projection area of ​​the line laser on the support roller (11); The visual recognition unit (122) can acquire the image projected by the line laser onto the battery film (2) and the calibration groove (111), and perform pixel equivalent calibration on the image based on the reference depth of the calibration groove (111), and calculate the thickness of the battery film (2) based on the pixel equivalent.

2. The hydrogen fuel membrane electrode detection device according to claim 1, characterized in that, The visual recognition unit (122) includes an industrial camera (1221) and a telecentric lens (1222) connected to the bottom of the industrial camera (1221); the optical axis of the telecentric lens (1222) is perpendicular to the central axis of the support roller (11).

3. The hydrogen fuel membrane electrode detection device according to claim 2, characterized in that, An air knife assembly (123) is provided on the mounting bracket (12) below the telecentric lens (1222) and the line laser emitter (121). The air outlet direction of the air knife assembly (123) is perpendicular to the optical axis of the telecentric lens (1222).

4. The hydrogen fuel membrane electrode detection device according to claim 3, characterized in that, The air knife assembly (123) has a pressure stabilizing chamber inside, and the air outlet has a slit-like structure.

5. The hydrogen fuel membrane electrode detection device according to claim 1, characterized in that, The calibration groove (111) is a multi-level stepped annular groove, which contains at least two concentric bottom surfaces with different reference depths, so as to provide a multi-segment linear pixel equivalent calibration reference for the visual recognition unit (122).

6. The hydrogen fuel membrane electrode detection device according to claim 1, characterized in that, A support frame (13) is provided above the frame (1), and a linear guide rail (131) extending along the axis of the support roller (11) is provided on the support frame (13); the mounting frame (12) is slidably mounted on the linear guide rail (131), and a drive module (132) for driving the mounting frame (12) to move laterally and reciprocally along the linear guide rail (131) is also provided on the support frame (13).

7. The hydrogen fuel membrane electrode detection device according to claim 6, characterized in that, The calibration grooves (111) not covered by the battery film (2) are provided on the outer peripheral surfaces of both ends of the support roller (11); the mounting frame (12) can be driven by the drive module (132) to one end of the support roller (11) to perform pixel equivalent calibration, and slide to the middle area of ​​the support roller (11) to perform continuous area array thickness measurement of the battery film (2) while maintaining the pixel equivalent.

8. The hydrogen fuel membrane electrode detection device according to claim 1, characterized in that, The visual recognition unit (122) is also used to extract the pixel coordinates of the step breakpoint formed when the line laser crosses the edge of the battery film (2) and the surface of the support roller (11), and synchronously calculate and output the real-time physical width and lateral offset of the battery film (2) based on the pixel coordinates of the step breakpoint.

9. A hydrogen fuel membrane electrode detection device according to claim 3, characterized in that, The air knife assembly (123) and the line laser emitter (121) are both connected to the mounting bracket (12) via a fine-tuning mechanism (124), which is used to adjust the angles of the air knife assembly (123) and the line laser emitter (121).

10. A hydrogen fuel membrane electrode processing apparatus, characterized in that, It includes a hydrogen fuel membrane electrode detection device as described in any one of claims 1-9.

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