Cleaning device

Abstract

The utility model discloses a cleaning device which is used for a visual detection system of a photovoltaic cell, and the visual detection system comprises a camera which vertically and downwards shoots a detection image of the photovoltaic cell carried on a conveyor belt, and a camera bottom plate which is arranged below the conveyor belt. The cleaning device comprises an air pipe arranged on the side edge of the camera bottom plate and an air conveying pipeline with the first output end communicating with the air pipe. A plurality of blowing holes are formed in the side, close to the camera bottom plate, of the air pipe and used for blowing pressurized air conveyed by the air conveying pipeline to the upper surface of the camera bottom plate. The air pipe is arranged on the side edge of the camera bottom plate, battery piece fragments on the camera bottom plate can be swept away, it is avoided that the battery piece fragments exist in an image collected and shot by the camera, and the accuracy of photovoltaic battery piece defect detection can be improved to a certain degree.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic cell detection technical field, in particular to a cleaning device. BACKGROUND

[0002] In actual preparation process, photovoltaic cell piece needs to utilize visual detection system to shoot and gather photovoltaic cell piece image, and then judges whether photovoltaic cell piece exists crack piece, breakage, dirt, over carving and other defect problems through image recognition. Figure 1 As shown in the figure, when the conveying belt conveys the photovoltaic cell piece to the directly below of the camera, the visual detection system can gather the photovoltaic cell piece image located in the directly below of the camera, and in addition, the camera bottom plate with the area larger than the photovoltaic cell piece is arranged below the conveying belt where the photovoltaic cell piece is located, which on the one hand shields other structures or sundries below the conveying belt from entering the field of view of the camera to interfere with the defect identification of the photovoltaic cell piece, and on the other hand also plays a certain light reflection role to improve the image definition of the photovoltaic cell piece.

[0003] However, in actual application, the camera bottom plate will inevitably retain the fragments of the photovoltaic cell piece broken, and when the image obtained by the camera shooting the fragments and the photovoltaic cell piece together is subjected to defect detection, the accuracy of the photovoltaic cell piece defect detection will be affected. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a cleaning device which can effectively clean the cell piece fragments on the camera bottom plate in the photovoltaic cell piece defect detection process and ensure the accuracy of the photovoltaic cell piece defect detection.

[0005] To solve the above technical problems, the utility model provides a cleaning device for the visual detection system of the photovoltaic cell piece, wherein the visual detection system comprises a camera vertically downward shooting a detection image of the photovoltaic cell piece carried on the conveying belt, and a camera bottom plate arranged below the conveying belt.

[0006] The cleaning device comprises an air pipe arranged at the side of the camera bottom plate and a gas conveying pipeline in gas communication with the air pipe.

[0007] The side of the air pipe facing the camera bottom plate is provided with a plurality of air blowing holes for blowing and sweeping the pressurized gas conveyed by the gas conveying pipeline to the upper surface of the camera bottom plate.

[0008] In an optional embodiment of the present application, the air pipe is arranged along the side edge of the camera bottom plate, the air blowing holes are sequentially distributed along the length direction of the air pipe, the height of each air blowing hole is higher than the upper surface of the camera bottom plate, and each air blowing hole is arranged obliquely downward so that the blowing direction of each air blowing hole points to the camera bottom plate.

[0009] In an alternative embodiment of the present application, the angle between the blowing direction of each blowing hole and the horizontal plane is 15° to 45°.

[0010] In an alternative embodiment of the present application, each blowing hole is a flat rectangular hole, and the size of the blowing hole along the length direction of the air pipe is greater than the size perpendicular to the length direction of the air pipe.

[0011] In an alternative embodiment of the present application, a blowing head is further arranged at the end position of the air pipe and in air communication with the second output end of the air supply pipeline.

[0012] The blowing head is used to spray and blow air to the area on the camera base plate closest to each blowing hole.

[0013] In an alternative embodiment of the present application, the height of the blowing head is higher than the upper surface of the camera base plate and is arranged obliquely downward, so that the blowing direction of the blowing head points to the camera base plate.

[0014] In an alternative embodiment of the present application, the air supply pipeline comprises an air supply pipe, and an air inlet switch, a CDA filter and a three-way joint are sequentially arranged on the air supply pipe along the air flow direction.

[0015] The air inlet switch is arranged at the input end of the air supply pipe, the input interface of the three-way joint is connected with the output end of the air supply pipe, and the two output interfaces of the three-way joint are respectively the first output end and the second output end of the air supply pipeline.

[0016] In an alternative embodiment of the present application, a throttle valve and a flow meter are further arranged on the air supply pipe.

[0017] In an alternative embodiment of the present application, the air inlet switch is an electromagnetic valve, and the electromagnetic valve, the throttle valve and the flow meter are connected with an upper computer.

[0018] In an alternative embodiment of the present application, the two output interfaces of the three-way joint are respectively provided with first and second control valves which can be independently controlled.

[0019] The utility model provides a kind of cleaning device, for the visual inspection system of photovoltaic cell piece, visual inspection system includes the camera for the detection image of vertically downward shooting photovoltaic cell piece carried on conveying belt, and the camera base plate being arranged below conveying belt;Cleaning device includes the air pipe being arranged in the side position of camera base plate and the gas pipeline being communicated with air pipe of first output end;Air pipe is close to the side of camera base plate and is provided with a plurality of blowholes, for the pressurized gas of gas pipeline delivery to the upper surface of camera base plate jet blowing.

[0020] In the present application, in order to avoid the interference of the battery piece fragments on the camera base plate to the defects of photovoltaic cell piece, an air pipe is arranged at the side position of the camera base plate, and the air pipe is also connected with a gas pipeline, therefore, the pressurized gas is filled into the air pipe through the gas pipeline, so that the pressurized gas is sprayed and blown from each blowhole of the air pipe to the camera base plate, so that the battery piece fragments on the camera base plate can be blown clean, and the battery piece fragments in the image captured by the camera can be avoided, that is, the accuracy of photovoltaic cell defect detection can be improved to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the utility model or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0022] Figure 1 It is a structural schematic view of visual inspection system;

[0023] Figure 2 It is a structural schematic view of cleaning device provided by the embodiment of the present application;

[0024] Figure 3 It is a lateral schematic view of air pipe blowing air flow provided by the embodiment of the present application;

[0025] Figure 4 It is a top view schematic view of blowing air flow of cleaning device provided by the embodiment of the present application;

[0026] In the drawings: 11 is camera, 12 is conveying belt, 13 is camera base plate, 14 is camera support, 15 is photovoltaic cell piece, 21 is air pipe, 211 is blowhole, 22 is gas pipeline, 221 is gas pipeline, 222 is inlet valve, 223 is tee joint, 224 is CAD filter, 225 is throttle valve, 23 is blowing head. DETAILED DESCRIPTION

[0027] REFERENCE Figure 1Although there is a certain gap between the conveying belt and the camera base plate below, due to the space limitation of various devices other than the visual detection system, it is not convenient for the staff to directly clean the various debris on the camera base plate.

[0028] Therefore, the cleaning device provided in the present application can clean the camera base plate by means of air blowing, so as to ensure the accuracy of the defect detection of the photovoltaic cell piece through image recognition to a certain extent.

[0029] In order to enable personnel in the technical field to better understand the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] As shown in Figure 1 and Figure 2 , the structural schematic diagram of the cleaning device provided by the embodiments of the present application is shown in Figure 2 .

[0031] The cleaning device in the present application is mainly applied to the visual detection system as shown in Figure 1 , which includes a camera 11 vertically downwardly shooting a detection image of a photovoltaic cell piece 15 carried on a conveying belt 12, and a camera base plate 13 arranged below the conveying belt 12. Among them, Figure 2 is a structural schematic diagram shown from the perspective of looking down at the photovoltaic cell piece 15, that is, the angle method of the camera 11 shooting the image.

[0032] The camera 11 in the visual detection system is suspended by a camera support 14, and the camera 11 vertically downwardly collects images; a conveying belt 12 is arranged below the camera 11, the width of the conveying belt 12 is slightly smaller than the width of the photovoltaic cell piece 15, and the length and width dimensions of the camera base plate 13 are both greater than the length and width dimensions of the photovoltaic cell piece 15, so as to more comprehensively shield other structures other than the photovoltaic cell piece 15. Thus, the edge area of the camera base plate 13 will also be present in the field of view of the camera 11; then if there are cell piece debris in the edge area of the camera base plate 13, when the defects of the photovoltaic cell piece 15 are identified based on the image shot by the camera 11, that is, the cell piece debris is easily identified as the defect of the perfect photovoltaic cell piece 15, thereby reducing the accuracy of the defect identification of the photovoltaic cell piece 15.

[0033] Based on this, as shown in Figure 2 , in a specific embodiment of the present application, a cleaning device is further arranged, which can include:

[0034] A gas pipe 21 is arranged at the side of the camera base plate 13, and a gas conveying pipe 22 is in gas communication with the gas pipe 21 and has a first output end;

[0035] The gas pipe 21 is provided with a plurality of gas blowing holes 211 near the side of the camera base plate 13, and the gas blowing holes 211 are used to spray and blow the pressurized gas conveyed by the gas conveying pipe 22 to the upper surface of the camera base plate 13.

[0036] The cleaning device in the embodiment basically includes two parts, one part is the gas pipe 21 arranged at the side of the camera base plate 13, and the other part is the gas conveying pipe 22 in gas communication with the gas pipe 21, and the gas conveying pipe 22 can fill the pressurized gas into the gas pipe 21; and because the gas pipe 21 is provided with a plurality of gas blowing holes 211 near the side of the camera base plate 13, the pressurized gas filled into the gas pipe 21 can be sprayed and blown out through the gas blowing holes 211, and then the surface of the camera base plate 13 is sprayed and blown, and if there are battery piece fragments on the camera base plate 13, the battery piece fragments can also be blown off by the pressurized gas, so as to ensure the cleanliness of the upper surface of the camera base plate 13, and avoid the interference of the battery piece fragments remaining on the camera base plate 13 on the defect detection of the photovoltaic cell 15, and ensure the accuracy and reliability of the defect detection of the photovoltaic cell 15.

[0037] In addition, the cleaning device in the embodiment only needs to be arranged with a gas pipe 21 provided with gas blowing holes 211 at the side of the camera base plate 13, and the gas pipe 21 is connected to the gas conveying device, the whole device has a simple structure and low implementation cost.

[0038] Further, in an alternative implementation manner of the embodiment, the cleaning device can further include:

[0039] The gas pipe 21 is arranged along the side edge of the camera base plate 13;

[0040] The gas blowing holes 211 are sequentially arranged along the length direction of the gas pipe 21, the height of each gas blowing hole 211 is higher than the upper surface of the camera base plate 13, and each gas blowing hole 211 is arranged in a downward inclination, so that the blowing direction of each gas blowing hole 211 points to the camera base plate 13.

[0041] As shown in FIG. 1, Figure 2 The length of the gas pipe 21 in the embodiment should be basically the same as the length of the side of the camera base plate 13 to which the gas pipe 21 is attached, and the gas blowing holes 211 are sequentially arranged along the length direction of the gas pipe 21, so as to ensure that the blowing surface formed by the blowing gas flow of each gas blowing hole 211 covers the entire upper surface of the camera base plate 13. Figure 4 The dotted line with an arrow in FIG. 1 shows the flowing direction of the blowing gas flow of each gas blowing hole 211.

[0042] On this basis, the air blowing holes 211 in the embodiment are further arranged to blow air downwardly to the camera bottom plate 13; in actual application, the air blowing holes 211 can be arranged slightly lower on the air pipe 21. As shown in Figure 3 Figure 3 is a structural schematic view shown from the camera bottom plate 13 side, Figure 3 the arrowed dashed line in the figure shows the air flow direction of the air blowing hole 211 on the air pipe 21. Based on Figure 3 it can be known that the air blowing hole 211 on the air pipe 21 blows air downwardly, which can ensure the blowing strength on the surface of the camera bottom plate 13, and avoid the risk of the photovoltaic cell 15 on the conveying belt 12 being blown off by the air flow.

[0043] In actual application, the included angle between the blowing direction of the air blowing hole 211 and the horizontal plane can be 15° to 45°, which can ensure the air blowing hole 211 to blow the surface of the camera bottom plate 13 downwardly, and avoid the included angle between the air blowing hole 211 and the camera bottom plate 13 being too large, so that the air flow of the air blowing hole 211 cannot blow the surface on the other side of the camera bottom plate 13.

[0044] In addition, in order to further improve the blowing effect of the air blowing hole 211, in an alternative implementation manner of the embodiment, each air blowing hole 211 can be further a flat rectangular hole, and the size of the air blowing hole 211 along the length direction of the air pipe 21 is greater than the size perpendicular to the length direction of the air pipe 21.

[0045] The air blowing hole 211 in the embodiment is a flat rectangular hole, and the size perpendicular to the air pipe 21 direction can be relatively small, so that the air blowing hole 211 is a straight line hole, which can increase the blowing area of the air blowing hole 211 along the length direction of the air pipe 21, and make the air flow blown by the air blowing hole 211 flat, avoiding the interference to the cell on the conveying belt 12.

[0046] Based on the above description, as shown in Figure 2 in another alternative embodiment of the application, the cleaning device can further comprise:

[0047] an air blowing head 23 arranged at the end position of the air pipe 21 and in air communication with the second output end of the air supply pipeline 22;

[0048] The air blowing head 23 is used to blow air to the area closest to the air blowing hole 211 on the camera bottom plate 13.

[0049] On this basis, as shown in Figure 2 ​As shown, for the region between each two blowing holes 211 on the air pipe 21, there may be a blind area of air flow, that is, on the camera base plate 13, there is a region that cannot be swept by each blowing hole 211 on the air pipe 21. Therefore, in the embodiment, a blowing head 23 is further arranged at the end position of the air pipe 21, and the blowing direction of the blowing head 23 is substantially parallel to the vertical plane in which the air pipe 21 is located. Thus, the region close to the air pipe 21 on the camera base plate 13 can be swept transversely, thereby ensuring more comprehensive sweeping of the entire surface of the camera base plate 13.

[0050] Similarly to the blowing holes 211 on the air pipe 21, the blowing head 23 in the embodiment should also be arranged obliquely downward, and the downward oblique direction can be between 15° and 45°, for example, 15°, 30°, 45°, and the like. Thus, the blowing direction of each blowing hole 211 is also obliquely downward to the camera base plate 13.

[0051] In Figure 2 In the embodiment shown, only one blowing head 23 is arranged at one end of the air pipe 21. In actual application, one blowing head 23 can also be arranged at each end of the air pipe 21, thereby sweeping the region in front of the air pipe 21 from both ends of the air pipe 21.

[0052] In addition, in Figure 2 In the embodiment shown, only one blowing head 23 is arranged at one end of the air pipe 21, thereby blowing only one air flow. However, in actual application, multiple blowing heads 23 can also be arranged at the same end of the air pipe 21. In addition, one air pipe 21 can also be arranged at each adjacent side of the camera base plate 13, and the two air pipes 21 can sweep the camera base plate 13 in two mutually perpendicular directions, thereby ensuring the comprehensive reliability of the surface sweeping of the camera base plate 13 to a certain extent.

[0053] Based on any of the above embodiments, in another optional embodiment of the present application, the gas conveying pipeline in the cleaning device can include:

[0054] The gas conveying pipeline 221, and the air inlet switch 222, the CDA filter 224, and the three-way interface 223 arranged in sequence on the gas conveying pipeline 221 along the air flow direction;

[0055] The air inlet switch 222 is arranged at the input end of the gas conveying pipeline 221, the input interface of the three-way interface 223 is connected with the output end of the gas conveying pipeline 221, and the two output interfaces of the three-way interface 223 are respectively the first output end and the second output end of the gas conveying pipeline.

[0056] It can be understood that the input interface of the gas conveying pipeline 221 in the embodiment should be in communication with the air pump, and the air inlet switch 222 is a switch for controlling the mutual flow and cutoff of the air path between the gas conveying pipeline 221 and the air pump.

[0057] In addition, the CDA filter 224 is arranged on the air supply pipe 221 in the embodiment, so as to ensure the cleanliness of the pressurized air blown to the camera base plate 13. In addition, the first output end of the air supply pipe 221 is in communication with the end of the air pipe 21. In actual application, the first output end of the air supply pipe 221 can also be in communication with the middle section of the air pipe 21, or the air supply pipe 221 can be provided with multiple output ends, each of which is in communication with different sections of the air pipe 21. Figure 2

[0058] On this basis, the air supply pipe 221 in the embodiment can be further provided with a throttle valve 225 and a flow meter. The throttle valve 225 and the flow meter jointly control the flow of the air flow delivered by the output pipe to the air pipe 21 and the air blowing head 23, so as to adjust the blowing strength on the surface of the camera base plate 13.

[0059] In addition, in order to realize intelligent adjustment of the air flow blown to the surface of the camera base plate 13, in an alternative implementation manner of the embodiment, the air inlet switch 222 arranged at the input end of the air supply pipe 221 can be an electromagnetic valve, which is connected to the upper computer together with the throttle valve 225 and the flow meter. In actual application, the operator can control the opening and closing of the electromagnetic valve through the upper computer, and the size of the air flow in the air supply pipe 221 is detected through the flow meter, so as to control the opening degree of the throttle valve 225 and reasonably adjust the size of the air flow in the air supply pipe 221, and thus the size of the air flow delivered by the air supply pipe 221 to the air pipe 21 can ensure the effectiveness of the blowing of the blowing hole 211 to the surface of the camera base plate 13.

[0060] As described above, the first output interface and the second output interface of the three-way interface 223 connected by the air supply pipe 221 in the embodiment can be connected to the air pipe 21 and the air blowing head 23, respectively. In order to more accurately control the blowing of the camera base plate 13, the first control valve and the second control valve can be further arranged at the first output interface and the second output interface, respectively, which can be independently controlled.

[0061] The first control valve and the second control valve can be controlled to be opened and closed through the upper computer, respectively. In actual application, the first control valve and the second control valve can be alternately opened and closed, so as to realize the overall blowing of the surface of the camera base plate 13, while avoiding the disturbance of the air flow blown by the air blowing head 23 and the air pipe 21.

[0062] ​In summary, in order to avoid the interference of the battery piece fragments on the camera bottom plate to the defects of the photovoltaic battery piece, the air pipe is arranged at the side position of the camera bottom plate, and the air pipe is also connected with the gas conveying pipeline, so that the pressurized gas is filled into the air pipe through the gas conveying pipeline, the pressurized gas is sprayed and blown from the blowing holes of the air pipe to the camera bottom plate, so that the battery piece fragments on the camera bottom plate can be blown clean, the battery piece fragments in the image collected and shot by the camera are avoided, and the accuracy of the photovoltaic battery piece defect detection can be improved to a certain extent.

[0063] It should be noted that the relational terms herein such as first and second and the like are used only to differentiate one entity or operation from another, and do not necessarily require or imply that any such actual relationship or order exists between or among the entities or operations. Moreover, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise a list of elements do not include only those elements in the list of elements. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus including the element. In addition, the above technical solutions provided by the embodiments of the present application are not described in detail, so as not to be too verbose.

[0064] The principles and implementation modes of the present application are described by applying specific examples herein, and the above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled persons in the technical field, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A cleaning device, characterized in that, A visual inspection system for photovoltaic cells, comprising a camera base plate arranged below a conveyor belt; The cleaning device comprises an air pipe arranged at a side of the camera base plate, and a gas supply pipeline in gas communication with a first output end of the air pipe; The air pipe is arranged with a plurality of air blowing holes on a side thereof facing the camera base plate, for blowing pressurized gas supplied by the gas supply pipeline to the upper surface of the camera base plate.

2. The cleaning device of claim 1, wherein, The air pipe is arranged along a side edge of the camera base plate; the air blowing holes are arranged along the length direction of the air pipe; the height of each air blowing hole is higher than the upper surface of the camera base plate, and each air blowing hole is arranged obliquely downward so that the blowing direction of each air blowing hole points to the camera base plate.

3. The cleaning device of claim 2, wherein, The included angle between the blowing direction of each air blowing hole and the horizontal plane is 15° to 45°.

4. The cleaning device of claim 2, wherein, Each air blowing hole is a flat rectangular hole, and the size of the air blowing hole along the length direction of the air pipe is greater than the size perpendicular to the length direction of the air pipe.

5. The cleaning device of claim 1, wherein, The air blowing head is arranged at the end of the air pipe and in gas communication with the second output end of the gas supply pipeline; The air blowing head is used for blowing pressurized gas to the area of the camera base plate closest to each air blowing hole.

6. The cleaning device of claim 5, wherein, The height of the air blowing head is higher than the upper surface of the camera base plate and is arranged obliquely downward so that the blowing direction of the air blowing head points to the camera base plate.

7. A cleaning device as claimed in any one of claims 1 to 6, characterised in that, The gas supply pipeline comprises a gas supply pipe, and an air inlet switch, a CDA filter and a three-way joint are arranged in sequence on the gas supply pipe along the gas flow direction; The air inlet switch is arranged at the input end of the gas supply pipe, the input interface of the three-way joint is connected with the output end of the gas supply pipe, and the two output interfaces of the three-way joint are respectively the first output end and the second output end of the gas supply pipeline.

8. The cleaning device of claim 7, wherein, The gas supply pipe is further provided with a throttle valve and a flow meter.

9. The cleaning device of claim 8, wherein, The air inlet switch is an electromagnetic valve, and the electromagnetic valve, the throttle valve and the flow meter are connected with an upper computer.

10. The cleaning device of claim 7, wherein, The two output interfaces of the three-way joint are respectively provided with first and second control valves which can be controlled independently of each other.

Images