Visual detection device for metal bipolar plate

Abstract

The invention provides a visual detection device for a metal bipolar plate. The visual detection device comprises a conveying unit and a visual detection unit, the conveying unit comprises two conveying assemblies which are symmetrically arranged about the central axis of the conveying unit in the first direction, and a metal bipolar plate conveying channel extending in the first direction is arranged between the two conveying assemblies; each conveying assembly comprises a driving mechanism extending in the first direction and a plurality of driven mechanisms arranged in the first direction at intervals and in transmission connection with the driving mechanism, and the driven mechanisms can support the edge of the metal bipolar plate in the vertical direction. The metal bipolar plate is placed on the rolling wheels of the driven mechanism of the conveying unit and conveyed through the driving mechanism of the conveying unit, so that in the whole conveying process, the device only needs to be in contact with the edge part of the metal bipolar plate; and the possible damage to the surface coating of the metal bipolar plate caused by the existing placing platform or belt is fundamentally avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of metal bipolar plate visual inspection, and in particular to a metal bipolar plate visual inspection device. Background Art

[0002] Metal bipolar plates have good mechanical strength and can meet the mechanical performance requirements of fuel cell bipolar plates. In order to improve the corrosion resistance and conductivity of metal bipolar plates in the proton exchange membrane fuel cell environment, a widely used method is metal surface coating.

[0003] In the production process of metal bipolar plates, due to various factors such as the participation of personnel, the transportation and transfer of materials between equipment, and the fluctuation of process parameters of processing and manufacturing equipment, the metal bipolar plates will have appearance defects such as surface dirt, coating scratches, uneven coating, coating shedding, and flow channel deformation, which will affect the excellent performance of the metal bipolar plates and lead to the production of inferior products, and ultimately lead to poor performance and unsatisfactory life of proton exchange membrane fuel cells. Machine vision appearance inspection of metal bipolar plate coatings has become an urgent need for metal plate production lines.

[0004] At present, the widely used method for appearance inspection of metal sheets in China is to place the metal sheets on a platform or convey them on a belt. For example, CN217180636U discloses a surface quality inspection device for refrigerator metal sheets, which is configured to place the metal sheets on a supporting roller for operation, and the visual inspection component is located above the metal sheets. The dome light source irradiates white light onto the metal sheets, and the camera takes pictures of the surface of the metal sheets. The pictures taken are sent to the main controller for visual recognition processing. However, this solution will contact the coating on the flow channel of the metal bipolar plate during the transportation process, which brings the risk of coating damage. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing metal bipolar plate appearance detection device may contact the coating of the metal bipolar plate during transportation, causing damage to the coating.

[0006] In order to achieve the above object, the present invention provides a metal bipolar plate visual inspection device, the visual inspection device comprising a conveying unit, the conveying unit is capable of transporting the metal bipolar plate along a first direction; and

[0007] A visual inspection unit, which can collect and detect the surface condition of the metal bipolar plate in a vertical direction;

[0008] In which, the conveying unit includes two conveying components symmetrically arranged about the central axis of the conveying unit in the first direction, a metal bipolar plate conveying channel extending along the first direction is arranged between the two conveying components, and each of the conveying components includes an active mechanism extending along the first direction, a plurality of driven mechanisms arranged at intervals along the first direction and transmission-connected to the active mechanism, and the driven mechanism can support the edge of the metal bipolar plate in the vertical direction.

[0009] In some embodiments, the active mechanism includes a transmission shaft extending along the first direction, and a plurality of active gears sleeved on the transmission shaft at intervals, and the driven mechanism is in transmission connection with the active gears.

[0010] In some embodiments, the driven mechanism includes a driven gear meshing with the driving gear, a first rolling wheel coaxial with the driven gear, and a second rolling wheel transmission-connected to the first rolling wheel, the central axis of the driven gear is parallel to the vertical direction, and the surface of the second rolling wheel in the vertical direction can support the edge of the metal bipolar plate.

[0011] In some embodiments, the distance between two adjacent driving gears in the first direction is set to be smaller than the length of the metal bipolar plate in the first direction.

[0012] In some embodiments, a thickness of the first rolling wheel in the vertical direction is set to be greater than a thickness of the metal bipolar plate in the vertical direction.

[0013] In some embodiments, the conveying unit includes an adjusting mechanism, which is disposed below the active mechanism and the driven mechanism, and the adjusting mechanism is capable of adjusting the width of the metal bipolar plate conveying channel in a second direction, wherein the second direction is perpendicular to the first direction.

[0014] In some embodiments, the adjustment mechanism includes a gear with its axis located on the central symmetry plane of the metal bipolar plate delivery channel, two racks meshing with the gear and extending along the second direction, and the two racks are respectively connected to the two delivery components.

[0015] In some embodiments, the visual inspection device includes a platform, which includes a base platform extending along the first direction, two support platforms arranged above the base platform and extending along the first direction, the two conveying assemblies are respectively arranged on the two support platforms, and the adjustment mechanism can drive the two support platforms to move in the second direction relative to the base platform.

[0016] In some embodiments, the active mechanism is connected to the support platform via a support plate disposed on an upper surface of the support platform, and the rack is connected to the support platform via a connecting plate disposed on a lower surface of the support platform.

[0017] In some embodiments, the visual inspection unit includes a frame, a camera assembly disposed at the top and bottom of the frame, a light source assembly disposed above and below the side walls of the frame, and the conveying unit and the platform are located in the middle of the frame.

[0018] Through the above technical solution, the metal bipolar plate is placed on the rolling wheel of the driven mechanism of the conveying unit and transported by the active mechanism of the conveying unit, so that during the entire transportation process, the device only needs to contact the edge of the metal bipolar plate, fundamentally avoiding the damage that may be caused to the surface coating of the metal bipolar plate by the existing placement platform or belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a top view of a conveying unit of a metal bipolar plate visual inspection device disclosed in an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the active mechanism of the conveying unit of the metal bipolar plate visual inspection device disclosed in an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of a driven mechanism of a conveying unit of a metal bipolar plate visual inspection device disclosed in an embodiment of the present invention;

[0023] Figure 4 It is a front view of the adjustment mechanism of the conveying unit of the metal bipolar plate visual inspection device disclosed in an embodiment of the present invention;

[0024] Figure 5 It is a rear view of the adjustment mechanism of the conveying unit of the metal bipolar plate visual inspection device disclosed in an embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of the overall structure of the metal bipolar plate visual inspection device disclosed in an embodiment of the present invention;

[0026] Figure 7 is a side view of a metal bipolar plate visual inspection device disclosed in an embodiment of the present invention;

[0027] Figure 8 It is a top view of the metal bipolar plate visual inspection device disclosed in an embodiment of the present invention.

[0028] Description of Reference Numerals

[0029] 100, conveying unit; 110, active mechanism; 111, support plate; 112, first motor; 113, first reducer; 114, coupling; 115, active gear; 116, transmission shaft; 120, driven mechanism; 121, driven gear; 122, driven shaft; 123, first rolling wheel; 124, second rolling wheel; 125, gear box; 126, rolling shaft; 127, gear set; 130, adjustment mechanism; 131, active adjustment slider; 132 , driven adjustment slider; 133, connecting plate; 134, rack; 135, second motor; 136, second reducer; 137, gear; 200, visual inspection unit; 210, frame; 220, camera assembly; 221, first camera assembly; 222, second camera assembly; 230, light source assembly; 231, first light source assembly; 232, second light source assembly; 300, platform; 310, support platform; 320, base platform; 400, metal bipolar plate. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0031] The present invention provides these embodiments to make the present invention thorough and complete, and fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limiting.

[0032] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0033] In addition, the words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly perpendicular, but is within the tolerance range. "Parallel" is not strictly parallel, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0034] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0035] All terms used in the present invention have the same meanings as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0036] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0037] In order to solve the problem that the metal bipolar plate appearance inspection device in the prior art may contact the coating of the metal bipolar plate during transportation and cause damage to the coating, the present invention provides a metal bipolar plate visual inspection device, which includes a conveying unit 100, which can transport the metal bipolar plate 400 along a first direction; and a visual inspection unit 200, which can collect and detect the surface condition of the metal bipolar plate 400 in the vertical direction; wherein the conveying unit 100 includes two conveying assemblies symmetrically arranged about the central axis of the conveying unit 100 in the first direction, and a metal bipolar plate conveying channel extending along the first direction is arranged between the two conveying assemblies, each conveying assembly includes an active mechanism 110 extending along the first direction, and a plurality of driven mechanisms 120 spaced apart along the first direction and transmission-connected to the active mechanism 110, and the driven mechanism 120 can support the edge of the metal bipolar plate 400 in the vertical direction.

[0038] Among them, Figure 1 As shown, the first direction can be set as the conveying direction of the conveying unit 100 to transport the metal bipolar plate 400, and the second direction can be set as the width adjustment direction of the metal bipolar plate conveying channel. The first direction and the second direction can be set to be perpendicular to each other and parallel to the horizontal plane; the two conveying components included in the conveying unit 100 are exactly the same, and the two active mechanisms 110 of the two conveying components can operate synchronously to smoothly transport the metal bipolar plate 400. The edge of the metal bipolar plate 400 can pass over each driven mechanism 120 in the conveying component in sequence along the first direction; the visual inspection unit 200 can collect and detect the flow channel appearance and coating coverage on the surface of the metal bipolar plate 400. The visual inspection unit 200 and the conveying unit 100 are set as two modules that can be independent of each other or assembled, which greatly improves the versatility of the equipment.

[0039] Through the above technical solution, the metal bipolar plate 400 is placed on the driven mechanism 120 of the conveying unit 100 and is transported by the active mechanism 110 of the conveying unit 100, so that during the entire transportation process, the device only needs to contact the edge portion of the metal bipolar plate 400 and does not contact the flow channel portion in the middle of the metal bipolar plate 400, fundamentally avoiding the damage that the existing placement platform or belt may cause to the surface coating of the metal bipolar plate.

[0040] In some embodiments, the driving mechanism 110 includes a transmission shaft 116 extending along a first direction, a plurality of driving gears 115 sleeved on the transmission shaft 116 at intervals, and the driven mechanism 120 is in transmission connection with the driving gears 115 .

[0041] like Figure 1 and Figure 2 As shown, the active mechanism 110 can be driven by a driving assembly connected to one end of the transmission shaft 116 located at the entrance of the metal bipolar plate delivery channel. The driving assembly may include a first motor 112, a first reducer 113, and a coupling 114 coaxial with the transmission shaft 116. The first motor 112, the first reducer 113, and the coupling 114 can be connected in sequence in a first direction and connected to the transmission shaft 116 through the coupling 114.

[0042] In some embodiments, the driven mechanism 120 includes a driven gear 121 meshing with the driving gear 115, a first rolling wheel 123 coaxial with the driven gear 121, and a second rolling wheel 124 transmission-connected to the first rolling wheel 123, the central axis of the driven gear 121 is parallel to the vertical direction, and the surface of the second rolling wheel 124 in the vertical direction can support the edge of the metal bipolar plate 400.

[0043] like Figure 1-3As shown, the active mechanism 110 and the driven mechanism 120 can be connected by transmission through the meshing of the active gear 115 and the driven gear 121, the first rolling wheel 123 can be arranged below the driven gear 121 and connected to the driven gear 121 by transmission through the driven shaft 122, and the second rolling wheel 124 can be connected to the first rolling wheel 123 by transmission through the gear set 127; a rolling shaft 126 is arranged at the central axis of the second rolling wheel 124, and the extension direction of the rolling shaft 126 can be parallel to the second direction so that the upper surface of the second rolling wheel 124 is parallel to the horizontal plane, thereby achieving stable support for the edge of the metal bipolar plate 400; the structure of the first rolling wheel 123 and the second rolling wheel 124 can be exactly the same; a gear box 125 can be arranged outside the gear set 127 to make the structure more stable.

[0044] In some embodiments, the distance between two adjacent driving gears 115 in the first direction is set to be smaller than the length of the metal bipolar plate 400 in the first direction.

[0045] like Figure 1 As shown, the metal bipolar plate conveying channel can be set as a space extending along the first direction between two conveying assemblies. In order to prevent the metal bipolar plate 400 from falling off from the driven mechanism 120 when being transported in the metal bipolar plate conveying channel, the distance between two adjacent driving gears 115 in the first direction needs to be set to be smaller than the length of the metal bipolar plate 400 in the first direction, that is, at least two driven mechanisms 120 support each edge of the metal bipolar plate 400 during transportation. Specifically, the width of the metal bipolar plate conveying channel can be set to the distance in the second direction between the two end surfaces of the two second rolling wheels 124 close to the first rolling wheels 123 in the respective conveying assemblies.

[0046] In some embodiments, the thickness of the first rolling wheel 123 in the vertical direction is set to be greater than the thickness of the metal bipolar plate 400 in the vertical direction.

[0047] like Figure 3-5 As shown, the thickness of the first rolling wheel 123 in the vertical direction is set to be greater than the thickness of the metal bipolar plate 400 in the vertical direction, so that the edge of the metal bipolar plate 400 can be completely in the groove structure formed by the side of the first rolling wheel 123 and the upper surface of the second rolling wheel 124 during transportation, so as to ensure smooth transportation of the metal bipolar plate 400 by the conveying unit 100.

[0048] In some embodiments, the transport unit 100 includes an adjustment mechanism 130 , which is disposed below the active mechanism 110 and the driven mechanism 120 . The adjustment mechanism 130 can adjust the width of the metal bipolar plate transport channel in a second direction, which is perpendicular to the first direction.

[0049] like Figure 1 , 4 As shown in Figure 5, the adjustment mechanism 130 can be set near one end of the outlet of the metal bipolar plate delivery channel. The adjustment mechanism 130 can adjust the width of the metal bipolar plate delivery channel in the second direction to meet the transportation requirements of metal bipolar plates 400 of different widths. When the width of the metal bipolar plate delivery channel in the second direction increases or decreases, the delivery components on both sides of the channel will move away from or approach each other accordingly.

[0050] In some embodiments, the adjustment mechanism 130 includes a gear 137 whose axis is located on the central symmetry plane of the metal bipolar plate delivery channel, and two racks 134 extending along the second direction and meshing with the gear 137. The two racks 134 are respectively connected to the two delivery components.

[0051] like Figure 1 and 4 As shown, each rack 134 is connected to one of the two conveying assemblies. The adjustment mechanism 130 may also include a second motor 135 and a second reducer 136 disposed below the gear 137 and coaxial with the gear 137. The second motor 135 may drive the gear 137 to rotate, thereby converting the rotation of the gear 137 into a linear motion of the rack 134 meshing with the gear 137 in the second direction, thereby finally achieving the width adjustment of the metal bipolar plate conveying channel.

[0052] In some embodiments, the visual inspection device includes a platform 300, which includes a base platform 320 extending along a first direction, two support platforms 310 extending along the first direction arranged above the base platform 320, two conveying components are respectively arranged on the two support platforms 310, and the adjustment mechanism 130 can drive the two support platforms 310 to move in a second direction relative to the base platform 320.

[0053] like Figure 4 and Figure 5 As shown, when the adjustment mechanism 130 changes the width of the metal bipolar plate delivery channel in the second direction, the base platform 320 can remain fixed, and the support platform 310 above the base platform 320 can drive the delivery assembly to move in the second direction. The support platform 310 and the base platform 320 can both be flat plate structures.

[0054] The movement of the support platform 310 relative to the base platform 320 can be achieved by providing a slide rail and a slider mechanism between the support platform 310 and the base platform 320. Specifically, Figure 1 , 4As shown in Figure 5, the adjustment mechanism 130 may include an active adjustment slider 131 and a driven adjustment slider 132. The active adjustment slider 131 may be set at one end close to the outlet of the metal bipolar plate delivery channel, and the driven adjustment slider 132 may be set at one end close to the inlet of the metal bipolar plate delivery channel. The active adjustment slider 131 and the driven adjustment slider 132 may be connected by a connecting rod.

[0055] In some embodiments, the active mechanism 110 is connected to the support platform 310 via a support plate 111 disposed on the upper surface of the support platform 310 , and the rack 134 is connected to the support platform 310 via a connection plate 133 disposed on the lower surface of the support platform 310 .

[0056] like Figure 1-2 As shown in Figures 4-5, there can be multiple support plates 111. The multiple support plates 111 can be arranged at intervals along the first direction on the side of the transmission shaft 116 and supported on the support platform 310. The support plate 111 can be arranged between two adjacent driven mechanisms 120; the connecting plate 133 can extend along the first direction, and the connecting plate 133 can be fixedly connected to the end of the rack 134.

[0057] In some embodiments, the visual inspection unit 200 includes a frame 210, a camera assembly 220 arranged at the top and bottom of the frame 210, a light source assembly 230 arranged above and below the side walls of the frame 210, and the conveying unit 100 and the platform 300 are located in the middle of the frame 210.

[0058] like Figure 6-8 As shown, the frame 210 can be a rectangular parallelepiped frame structure composed of multiple cross beams and longitudinal beams, and the conveying unit 100 and the platform 300 can be installed on the frame 210. Specifically, the conveying unit 100 and the platform 300 can be located in the middle of the frame 210; since the conveying unit 100 of the device only supports the edge of the metal bipolar plate 400, the camera assembly 220 can be set at the top and bottom of the frame 210 to simultaneously collect and detect the surface coating of the metal bipolar plate 400. Figure 6-7 As shown, the camera assembly 220 may include a first camera assembly 221 disposed at the top of the frame 210 and a second camera assembly 222 disposed at the bottom of the frame 210. The first camera assembly 221 and the second camera assembly 222 may be composed of camera groups symmetrical about the metal bipolar plate delivery channel. Each camera group may include two cameras spaced apart along a first direction. In this way, there is no need to sequentially inspect the two surfaces of the metal bipolar plate 400, use other equipment to flip the metal bipolar plate 400, etc., thereby improving the inspection efficiency and reducing the production cost. The light source assembly 230 may be disposed above and below the side wall of the frame 210, respectively. The light source assembly 230 may rotate around the first direction to adjust the illumination angle, such as Figure 6-7 As shown, the light source assembly 230 may include a first light source assembly 231 disposed near the upper side wall of the frame 210 and a second light source assembly 232 disposed near the lower side wall of the frame 210. Both the first light source assembly 231 and the second light source assembly 232 may be composed of light sources symmetrical about the metal bipolar plate delivery channel, and the light source may be an illuminating lamp extending along the first direction. The light source assembly 230 may be used in conjunction with the camera assembly 220.

[0059] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0060] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A visual inspection device for metal bipolar plates, characterized in that: include: A conveying unit (100), wherein the conveying unit (100) is capable of transporting the metal bipolar plate (400) along a first direction; and A visual inspection unit (200), wherein the visual inspection unit (200) is capable of collecting and inspecting the surface condition of the metal bipolar plate (400) in a vertical direction; The conveying unit (100) comprises two conveying assemblies symmetrically arranged about the central axis of the conveying unit (100) in the first direction, a metal bipolar plate conveying channel extending along the first direction is arranged between the two conveying assemblies, and each of the conveying assemblies comprises an active mechanism (110) extending along the first direction, and a plurality of driven mechanisms (120) arranged at intervals along the first direction and transmission-connected to the active mechanism (110), wherein the driven mechanism (120) is capable of supporting the edge of the metal bipolar plate (400) in the vertical direction.

2. The metal bipolar plate visual inspection device according to claim 1, characterized in that: The active mechanism (110) comprises a transmission shaft (116) extending along the first direction, and a plurality of active gears (115) sleeved on the transmission shaft (116) at intervals, and the driven mechanism (120) is transmission-connected to the active gears (115).

3. The metal bipolar plate visual inspection device according to claim 2, characterized in that: The driven mechanism (120) comprises a driven gear (121) meshing with the driving gear (115), a first rolling wheel (123) coaxial with the driven gear (121), and a second rolling wheel (124) drivingly connected to the first rolling wheel (123), wherein the central axis of the driven gear (121) is parallel to the vertical direction, and the surface of the second rolling wheel (124) in the vertical direction is capable of supporting the edge of the metal bipolar plate (400).

4. The metal bipolar plate visual inspection device according to claim 3, characterized in that: The distance between two adjacent driving gears (115) in the first direction is set to be smaller than the length of the metal bipolar plate (400) in the first direction.

5. The metal bipolar plate visual inspection device according to claim 3, characterized in that: The thickness of the first rolling wheel (123) in the vertical direction is set to be greater than the thickness of the metal bipolar plate (400) in the vertical direction.

6. The metal bipolar plate visual inspection device according to claim 3, characterized in that: The conveying unit (100) comprises an adjusting mechanism (130), wherein the adjusting mechanism (130) is arranged below the active mechanism (110) and the driven mechanism (120), and the adjusting mechanism (130) is capable of adjusting the width of the metal bipolar plate conveying channel in a second direction, wherein the second direction is perpendicular to the first direction.

7. The metal bipolar plate visual inspection device according to claim 6, characterized in that: The regulating mechanism (130) comprises a gear (137) whose axis is located on the central symmetry plane of the metal bipolar plate conveying channel, and two racks (134) extending along the second direction and meshing with the gear (137); the two racks (134) are respectively connected to the two conveying assemblies.

8. The metal bipolar plate visual inspection device according to claim 7, characterized in that: The visual inspection device comprises a platform (300), wherein the platform (300) comprises a base platform (320) extending along the first direction, and two support platforms (310) arranged above the base platform (320) and extending along the first direction, the two conveying assemblies are respectively arranged on the two support platforms (310), and the adjustment mechanism (130) is capable of driving the two support platforms (310) to move in the second direction relative to the base platform (320).

9. The metal bipolar plate visual inspection device according to claim 8, characterized in that: The active mechanism (110) is connected to the support platform (310) via a support plate (111) arranged on the upper surface of the support platform (310), and the rack (134) is connected to the support platform (310) via a connecting plate (133) arranged on the lower surface of the support platform (310).

10. The metal bipolar plate visual inspection device according to claim 8, characterized in that: The visual inspection unit (200) comprises a frame (210), a camera assembly (220) arranged at the top and bottom of the frame (210), and a light source assembly (230) arranged above and below the side wall of the frame (210); the conveying unit (100) and the platform (300) are located in the middle of the frame (210).

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