A motion control mechanism applied to a photovoltaic cell panel detection system

Abstract

The application discloses a motion control mechanism applied to a photovoltaic cell panel detection system, which comprises a bottom plate, a camera, a light source, a shell, a moving track frame and a control module, the bottom plate is installed on the moving track frame, the bottom of the moving track frame is provided with a horizontal driving mechanism and a telescopic foot group, and the telescopic foot group can be adsorbed to or separated from the photovoltaic cell panel; the telescopic foot group comprises telescopic fixed feet and a telescopic movable foot, the telescopic fixed feet are symmetrically distributed on the two sides of the telescopic movable foot and are fixed with the moving track frame, and the horizontal driving mechanism is fixedly connected with the telescopic movable foot; through the rotation and contraction of the telescopic fixed feet and the telescopic movable foot and the driving of the horizontal driving mechanism, the moving track frame is driven to move, and the ordinary rolling motion mode such as a roller or a track is avoided, so that the contact area between the machine and the photovoltaic cell panel is not too small, the pressure of the contact part between the machine and the photovoltaic cell panel is not too large, and new hidden cracks of the silicon wafer are avoided.

Description

Technical Field

[0001] This invention belongs to the field of mobile equipment technology, specifically relating to a motion control mechanism applied to a photovoltaic panel detection system. Background Technology

[0002] my country has a vast territory with long hours of sunshine and high solar intensity in some areas, making it ideal for developing solar power. A key component of a solar power system is the photovoltaic cell. Due to mechanical or thermal stress, microcracks can easily develop in photovoltaic cells during operation. These microcracks expand under mechanical loads, potentially leading to open-circuit failure and causing hot spot effects. Hot spot effects occur when defective areas in a photovoltaic module (shaded, cracked, dirty, etc.) consume energy generated by other areas, causing localized overheating. When microcracks damage the photovoltaic cell's grid lines, the collected current cannot be output normally, leading to partial or even complete cell failure. This further reduces the already low photoelectric conversion efficiency of the panel, causing continuous degradation and affecting its lifespan. In severe cases, it can even lead to natural disasters such as fires. Therefore, regular inspection for microcracks in photovoltaic cells is crucial at solar power plant sites.

[0003] Microcracks in existing photovoltaic cells cannot be detected by the naked eye. Currently, the detection of microcracks in photovoltaic cells mainly relies on methods such as electroluminescence to check for microcracks. This requires reversing the current of the solar panel and detecting the infrared light emitted by it. When used at the power generation site, the module to be tested needs to be disconnected from the power generation network and the test needs to be carried out in dark light, which is time-consuming, labor-intensive and inefficient.

[0004] Existing application CN202210978915 provides a system for convenient, efficient, and accurate detection of microcracks in photovoltaic cells. This application overcomes the shortcomings of existing technologies by providing a microcrack detection system for photovoltaic cells that does not require disassembly, enabling automated detection of microcracks in photovoltaic cells. The system first acquires information about hot spots in the photovoltaic power station using a thermal imaging acquisition module. Then, a microcrack coarse positioning module marks the location of cells exhibiting hot spots within the photovoltaic power station and transmits the location information to a motion control module. Finally, the motion control module sends a microcrack fine inspection module to the marked photovoltaic cells.

[0005] However, since the core component of a photovoltaic panel is a 100-200µm silicon wafer, damage to the photovoltaic panel from the inspection system itself must be avoided during the detection of microcracks. Ordinary rolling motion methods, such as rollers or tracks, result in excessive pressure at the contact point between the machine and the panel due to the small contact area, easily causing new microcracks in the silicon wafer. Therefore, there is a need to invent a motion module for photovoltaic panel inspection systems. Summary of the Invention

[0006] The purpose of this invention is to provide a motion control mechanism for a photovoltaic panel detection system to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a motion control mechanism for a photovoltaic panel detection system, comprising a base plate, a camera, a light source, a housing, and a control module. The base plate is provided with an air pump and a moving track frame. The bottom of the moving track frame is provided with a horizontal drive mechanism and a telescopic foot assembly. The bottom of the telescopic foot assembly is provided with a suction cup. The suction cup has an air passage that connects to a flexible hose of the air pump. The telescopic foot assembly includes telescopic fixed feet and telescopic movable feet. The telescopic fixed feet are symmetrically distributed on both sides of the telescopic movable feet and fixed to the moving track frame. The horizontal drive mechanism is fixedly connected to the telescopic movable feet. When the telescopic fixed foot is attached to the photovoltaic panel by the suction cup, the telescopic movable foot is shortened to detach from the photovoltaic panel, and the horizontal drive mechanism drives the telescopic movable foot to move. When the telescopic movable foot is attached to the photovoltaic panel by the suction cup, the telescopic fixed foot retracts to detach from the photovoltaic panel, and the horizontal drive mechanism drives the moving track frame to move.

[0008] Furthermore, the horizontal drive mechanism includes: a dual-axis motor, a b-gear, and a b-rack. The b-gear is connected to the output end of the dual-axis motor, the b-rack is located at the bottom of the moving track frame, the b-rack meshes with the b-gear, the dual-axis motor is slidably connected to the bottom of the moving track frame, and the telescopic fixing foot is fixed to the dual-axis motor.

[0009] Furthermore, the dual-axis motor is equipped with a slider, and the bottom of the moving track frame is provided with a slide rail, with the slider slidably connected to the slide rail.

[0010] Furthermore, the telescopic fixed foot has the same structure as the telescopic movable foot. The telescopic fixed foot includes an inner sleeve, an outer sleeve, and a lifting assembly. The outer sleeve is located at the bottom of the moving track frame. The lifting assembly connects the inner sleeve and the outer sleeve, and the lifting assembly drives the inner sleeve to move in and out of the outer sleeve.

[0011] Furthermore, the lifting assembly includes: an a-gear, an a-rack, and a motor. The motor is located on one side of the outer sleeve, the a-gear is connected to the output end of the motor, and the a-rack is located on the inner sleeve, meshing with the a-gear.

[0012] Furthermore, a sealing ring is provided around the top periphery of the inner sleeve, and the outer side of the sealing ring contacts the inner wall of the outer sleeve. A vent hole is provided on one side of the top of the outer sleeve. Air pressure can be introduced into the inner sleeve, outer sleeve, and suction cup through the vent hole.

[0013] Furthermore, the base plate is mounted on the moving track frame, and the housing, camera, light source, control module and air pump are respectively mounted on the base plate. The housing protects the camera, light source, control module and air pump. A hollow cavity is connected between the base plate and the moving track frame, and the hollow cavity corresponds to the camera.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Damage caused to the microcrack detection system when working on the photovoltaic panel is prevented by using suction cups with a large contact area with the photovoltaic panel.

[0015] 2. Adsorption prevents the machine from sliding or tipping over when the photovoltaic panels are tilted at a large angle.

[0016] 3. By adopting a method of adsorption while moving, it can complete the movement in the x and y directions, avoiding the common rolling movement methods such as rollers or tracks, which have too small a contact area and cause too much pressure at the contact point between the machine and the solar panel, which can easily cause new microcracks in the silicon wafer. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a motion control mechanism applied to a photovoltaic panel detection system according to the present invention.

[0018] Figure 2 This is a schematic diagram of the bottom structure of a motion control mechanism applied to a photovoltaic panel detection system according to the present invention.

[0019] Figure 3 This is a schematic diagram of the walking foot structure of a motion control mechanism applied to a photovoltaic panel detection system according to the present invention.

[0020] Figure 4 This is a partial structural diagram of the moving track frame of a motion control mechanism applied to a photovoltaic panel detection system according to the present invention.

[0021] Figure 5 This is a partial cross-sectional schematic diagram of the moving track frame structure of a motion control mechanism applied to a photovoltaic panel detection system according to the present invention.

[0022] In the diagram: 1. Base plate; 2. Camera; 3. Light source; 4. Housing; 5. Control module; 6. Moving track frame; 601. Frame; 602. Slide rail; 603. Slider; 604. B rack; 605. Dual-axis motor; 606. B gear; 7. Telescopic foot assembly; 7-1. A walking foot; 7-2. B walking foot; 7-3. C walking foot; 7-4. D walking foot; 7-5. E walking foot; 7-6. F walking foot; 7-7. G walking foot; 7-8. H walking foot; 701. Suction cup; 703. Inner sleeve; 704. Outer sleeve; 705. A rack; 707. A gear; 708. Motor; 8. Air pump. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example like Figure 1-5As shown, a motion control mechanism for a photovoltaic panel detection system includes a base plate 1, a camera 2, a light source 3, a housing 4, a control module 5, a moving track frame 6, a telescopic foot assembly 7, and an air pump 8. The camera 2 and light source 3 are existing technologies. The camera 2 is located on the lower top side inside the housing 4, and the light source 3 is located on one side of the camera 2. Both can be fixed by connectors. The detection principle achieved by the light source 3 and camera 2 is existing technology and will not be specifically described in this invention. The telescopic foot assembly 7 includes telescopic fixed feet and telescopic movable feet, specifically: a) fixed telescopic foot 7-1, b) movable telescopic foot 7-2, c) fixed telescopic foot 7-3, d) movable telescopic foot 7-4, e) movable telescopic foot 7-5, f) fixed telescopic foot 7-6, g) movable telescopic foot 7-7, and h) fixed telescopic foot 7-8. The fixed telescopic foot 7-1 and c) are... Feet 7-3, fixed telescopic feet 7-6 and h are fixedly installed at the corners of the bottom of the moving track frame 6. Movable telescopic feet 7-2, d, d, e, e, and g are slidably disposed in the center of the perimeter of the moving track frame 6. The telescopic fixed feet have the same structure as the telescopic movable feet. Each telescopic fixed foot includes an inner sleeve 703, an outer sleeve 704, a rack 705, a gear 707, and a motor 708. The outer sleeve 704 is fitted onto the inner sleeve 703. The motor 708 is disposed on one side of the outer sleeve 704. The output end of the motor 708 is connected to the a gear 707. A rack 705 is disposed on one side of the inner sleeve 703. The rack 705 meshes with the a gear 707. Motor 708 drives gear 707 to rotate, gear 707 drives rack 705 to move up and down, so that inner sleeve 703 can enter and exit outer sleeve 704, and change the length of telescopic fixed foot.

[0025] The movable track frame 6 includes a frame 601, a slide rail 602, a slider 603, a rack 604, a dual-axis motor 605, and a gear 606. The slide rails 602 are respectively disposed on the inner sides of the frame 601. The two ends of the dual-axis motor 605 are respectively mounted on the sliders 603 at corresponding positions. The movable track frame 6 has racks 604 disposed on both inner sides. The output shafts at both ends of the dual-axis motor 605 are connected to the gears 606. The tops of the movable telescopic feet 7-2 (b), 7-4 (d), 7-5 (e), and 7-7 (g) are respectively fixed to the sliders 603 at corresponding positions.

[0026] The b gear 606 is meshed with the b rack 604 at the corresponding position.

[0027] The base plate 1 is mounted on the moving track frame 6, the outer shell 4 covers the base plate 1, the camera 2, the light source 3, the control module 5 and the air pump 8 are all mounted on the base plate 1, and the outer shell 4 provides protection for the camera 2, the light source 3, the control module 5 and the air pump 8.

[0028] The bottom of the telescopic foot assembly 7 is equipped with a suction cup 701, which can be made of rubber material and has a flat bottom surface, providing a large contact area with the surface of the photovoltaic panel.

[0029] The air pump 8 is connected to the hollow cavity of the telescopic foot assembly 7 via a hose. The hollow cavity of the telescopic foot assembly 7 is connected to the central hole of the suction cup 701. Air pressure can be introduced from the vent holes in the inner sleeve, outer sleeve, and the middle of the suction cup. The control module controls the air pump to draw or inflate air, so that the suction cup 701 can adsorb or detach from the photovoltaic panel. The control module 5 can use a current MCU controller to automatically control the operation of the air pump.

[0030] The control module 5 sends a command to control the motor 708 to rotate, realizing the vertical extension and retraction of the telescopic fixed foot and the telescopic movable foot. The moving track frame 6 is installed below the base plate 1. There is a hollow cavity between the base plate 1 and the moving track frame 6, which does not affect the field of view of the camera 2. In order to make the structure sufficiently stable when the whole moves, the size of the moving track frame 6 is larger than the size of the base plate 1.

[0031] Assuming the angle between the photovoltaic panel and the horizontal plane is 0, we have: Where P is the pressure, m is the mass of the entire machine, g is the acceleration due to gravity, and S is the contact area between the machine and the photovoltaic panel. In order to reduce the pressure, given a fixed total mass of the machine, the contact area between the machine and the photovoltaic panel should be increased.

[0032] If the photovoltaic panel has a small tilt angle, no water accumulation on its surface, and no strong winds, the telescopic foot assembly 7 extends downwards, the suction cup 701 contacts the surface of the photovoltaic panel, the air pump 8 draws air, the suction is activated, and the air pump is turned off after the air pressure decreases; when it leaves the photovoltaic panel, the air pump 8 inflates, the telescopic foot assembly 7 retracts upwards, and the suction cup 701 detaches from the photovoltaic panel.

[0033] When the entire assembly moves along the x-direction, the movable telescopic feet d (7-4), e (7-5), b (7-2), and g (7-7) retract until they are no longer in contact with the photovoltaic panels. At this point, the entire assembly is supported by the fixed telescopic feet a (7-1), f (7-6), c (7-3), and h (7-8). The dual-axis motor 605 in the x-direction starts, driving the gear b 606 to rotate. The moving track frame 6 cannot move because the four telescopic feet are attached to the photovoltaic panels, and the rack b 604 also cannot move. This causes gear b 606 to move forward, and the two dual-axis motors 605 in the x direction to move forward as well, causing movable telescopic feet b 7-2 and g 7-7 to move forward. Before movable telescopic feet b 7-2 and g 7-7 collide with fixed telescopic feet c 7-3 and h 7-8, the dual-axis motors 605 shut off, movable telescopic feet b 7-2 and g 7-7 stop moving, and then extend downwards, causing suction cup 701 to contact the photovoltaic panel; then, fixed telescopic feet a 7- 1. Fixed telescopic feet 7-6 (f), 7-3 (c), and 7-8 (h) are slightly retracted, so that they make slight contact with the photovoltaic panel or just barely avoid contact. As a preferred implementation, the fixed telescopic feet on the side furthest from movable telescopic feet 7-2 (b) and 7-7 (g) can make slight contact. This minimizes friction during movement and prevents the frame 6 from tipping over if it wobbles. In this case, the frame relies primarily on movable telescopic feet 7-2 (b) and 7-7 (g) for support. The dual-axis motor 60... 5 drives gear 606 to rotate, gear 606 drives rack 604 to move forward, and the moving track frame 6 moves forward accordingly. Before fixed telescopic feet 7-1 and 7-6 collide with movable telescopic feet 7-2 and 7-7, the dual-axis motor 605 is turned off, and the whole movement stops. Fixed telescopic feet 7-1, 7-6, 7-3, and 7-8 extend downward, so that suction cup 701 contacts the photovoltaic panel, realizing movement in the x direction.

[0034] When the entire structure moves along the y-direction, the movable telescopic feet 7-2 (b), 7-7 (g), 7-4 (d), and 7-5 (e) retract until they are no longer in contact with the photovoltaic panels. At this point, the entire structure is supported by the fixed telescopic feet 7-1 (a), 7-6 (f), 7-3 (c), and 7-8 (h). The dual-axis motor 605 in the y-direction starts, driving the gear 606 (b) to rotate. The moving track frame 6 cannot move because the four telescopic feet are attached to the photovoltaic panels, and the rack 604 (b) also cannot move. This causes the gear 606 (b) to move forward, and the two dual-axis motors 605 in the y-direction move forward accordingly, enabling the movable telescopic feet 7-4 (d) and 7-5 (e) to move forward. Before the movable telescopic feet 7-4 (d) and 7-5 (e) collide with the fixed telescopic feet 7-1 (a) and 7-3 (c), the dual-axis motors 605 shut down, and the movable telescopic feet 7-4 (d) and 7-5 (e) stop. The frame moves and then extends downwards, bringing the suction cup 701 into contact with the photovoltaic panel. Next, fixed telescopic feet a-7-1, f-7-6, c-7-3, and h-7-8 retract upwards, making slight contact with the photovoltaic panel. This minimizes friction and prevents the frame 6 from tipping over if it wobbles. At this point, the frame is supported by movable telescopic feet d-7-4 and e-7-5. The dual-axis motor 605 drives gear b-606 to rotate, which in turn drives rack b-604 forward. The moving track frame 6 moves forward accordingly. Before fixed telescopic feet f-7-6 and h-7-8 collide with movable telescopic feet d-7-4 and e-7-5, the dual-axis motor 605 shuts off, stopping the frame from moving. Fixed telescopic feet a-7-1, f-7-6, c-7-3, and h-7-8 extend downwards, bringing the suction cup 701 into contact with the photovoltaic panel, thus achieving movement in the y-direction.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motion control mechanism for a photovoltaic panel detection system, comprising a base plate (1), a camera (2), a light source (3), a housing (4), and a control module (5), characterized in that, Also includes: A movable track frame (6); the base plate (1) is mounted on the movable track frame (6); a horizontal drive mechanism; the horizontal drive mechanism is mounted on the bottom of the movable track frame (6); Telescopic foot assembly (7); the telescopic foot assembly (7) can be adsorbed or detached from the photovoltaic panel; The telescopic foot assembly (7) includes telescopic fixed feet and telescopic movable feet. The telescopic fixed feet are symmetrically distributed on both sides of the telescopic movable feet and fixed to the moving track frame (6). The horizontal drive mechanism is fixedly connected to the telescopic movable feet. The moving track frame (6) is moved by alternating contraction of the telescopic fixed feet and the telescopic movable feet and by the drive of the horizontal drive mechanism. The bottom of the telescopic foot assembly (7) is provided with a suction cup (701), and the bottom plate (1) is provided with an air pump (8). The suction cup (701) has an air passage that connects to the air pump (8). When the telescopic fixed foot is attached to the photovoltaic panel by the suction cup (701), the telescopic movable foot is shortened to detach from the photovoltaic panel, and the horizontal drive mechanism drives the telescopic movable foot to move. When the telescopic movable foot is attached to the photovoltaic panel by the suction cup (701), the telescopic fixed foot is shortened to detach from the photovoltaic panel, and the horizontal drive mechanism drives the moving track frame (6) to move. The horizontal drive mechanism includes a dual-axis motor (605), a b gear (606), and a b rack (604). The b gear (606) is connected to the output end of the dual-axis motor (605). The b rack (604) is located at the bottom of the moving track frame (6) and meshes with the b gear (606). The dual-axis motor (605) is slidably connected to the bottom of the moving track frame (6). The telescopic movable foot is fixed on the dual-axis motor (605).

2. The motion control mechanism for a photovoltaic panel detection system according to claim 1, characterized in that: The dual-axis motor (605) is equipped with a slider (603), and the bottom of the moving track frame (6) is provided with a slide rail. The slider (603) is slidably connected to the slide rail.

3. The motion control mechanism for a photovoltaic panel detection system according to claim 1, characterized in that: The telescopic fixed foot has the same structure as the telescopic movable foot. The telescopic fixed foot includes an inner sleeve (703), an outer sleeve (704), and a lifting assembly. The outer sleeve (704) is located at the bottom of the moving track frame (6). The lifting assembly connects the inner sleeve (703) and the outer sleeve (704). The lifting assembly drives the inner sleeve (703) to move in and out of the outer sleeve (704).

4. The motion control mechanism for a photovoltaic panel detection system according to claim 3, characterized in that: The lifting assembly includes: an a gear (707), an a rack (705), and a motor (708). The motor (708) is disposed on one side of the outer sleeve (704). The a gear (707) is connected to the output end of the motor (708). The a rack (705) is disposed on the inner sleeve (703) and meshes with the a gear (707).

5. The motion control mechanism for a photovoltaic panel detection system according to claim 3, characterized in that: A sealing ring is provided on the outer periphery of the top end of the inner sleeve (703), and the outer side of the sealing ring contacts the inner wall of the outer sleeve (704). A vent hole is provided on one side of the top end of the outer sleeve (704).

6. The motion control mechanism for a photovoltaic panel detection system according to claim 1, characterized in that: The base plate (1) is mounted on the moving track frame (6). The outer shell (4), the control module (5) and the air pump (8) are respectively mounted on the base plate (1). The outer shell (4) provides protection for the camera (2), the light source (3), the control module (5) and the air pump (8). A hollow cavity is connected between the base plate (1) and the moving track frame (6). The hollow cavity corresponds to the camera (2).

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