CN217766128U

CN217766128U - Photovoltaic module appearance defect visual inspection device based on camera is swept to line

Info

Publication number: CN217766128U
Application number: CN202221535148.1U
Authority: CN
Inventors: 李佳; 李宝; 李雷; 郑军
Original assignee: Matrixtime Robotics Shanghai Co ltd
Current assignee: Matrixtime Robotics Shanghai Co ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-11-08
Anticipated expiration: 2032-06-17

Abstract

The utility model belongs to the technical field of machine vision, concretely relates to photovoltaic module appearance imperfections visual inspection device based on camera is swept to line, including being located the support between two conveyer belts, the support is equipped with the clearing hole that is used for photovoltaic module to pass with conveyer belt department of correspondence, clearing hole top and below all are equipped with the light source and the camera is swept to the line. The utility model provides a detection device is small, need not to carry out the upset operation to photovoltaic module, and detection efficiency is high.

Description

Photovoltaic module appearance defect visual inspection device based on camera is swept to line

Technical Field

The utility model belongs to the technical field of machine vision, concretely relates to photovoltaic module appearance imperfections visual inspection device based on camera is swept to line.

Background

At present, the production line of photovoltaic modules (called modules for short) is produced continuously for 24 hours; in order to ensure the product quality, corresponding quality testing personnel can carry out detection at the main process step position of component manufacturing; the size of the assembly is large, but the defects to be detected may be small; the size is big, and the workman looks over inconveniently, and the little detection speed of defect and effect are difficult to guarantee.

The main method of the current production line is as follows: 1) The assembly is grasped and turned over, and the assembly is erected to be convenient for quality testing personnel to check; 2) The components are horizontally placed, and quality inspection staff observe from one side or two sides; 3) Component imaging using a large imaging device: shooting different parts of the same component for multiple times in parallel by adopting a multi-face array camera, finally splicing partial images shot by all the cameras into an image of a complete component, then displaying the image on a large liquid crystal television (such as a 55-66 inch large television), and observing defects by quality inspection staff through a television screen; the equipment needs to take pictures step by step, so the equipment is generally huge and needs to be matched with electrical control, so that the component stays at an accurate specified position for taking pictures; meanwhile, when an area-array camera is used for shooting a large-width glass product, the light reflection is serious, the polishing is difficult, the image quality is difficult to ensure, and the detection precision is also inconvenient to improve; the equipment is large and complex, and the cost is high; the time is long when the photographing is carried out in a pause mode.

The existing component detection mode is manual, so that the efficiency is low, the level difference is large, the consistency is poor, workers are tired at night, and the quality cannot be guaranteed; or depends on a large device for image acquisition, and has high cost, low speed and poor imaging quality.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a photovoltaic module appearance imperfections visual detection device based on camera is swept to line, the device is small, need not to carry out the upset operation to photovoltaic module, and detection efficiency is high.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a photovoltaic module appearance imperfections visual inspection device based on camera is swept to line which characterized in that: including being located the support 21 between two conveyer belts 11, support 21 is equipped with the clearing hole 26 that is used for photovoltaic module 10 to pass with conveyer belt 11 department of correspondence, all be equipped with light source and line sweep camera 25 above clearing hole 26 and below.

Further, the support 21 is a cabinet frame structure.

Furthermore, the front and the rear surfaces of the support 21 are covered with baffles 22, and the baffles 22 are provided with through holes 26.

Furthermore, a heat dissipation hole 27 is formed in the position of the baffle 22 corresponding to the light source.

Further, the light source above the passing hole 26 is a dome light source 23.

Further, the light source below the through hole 26 is composed of two sets of linear light sources 24 parallel to each other.

Furthermore, two ends of the linear light source 24 are connected with the bracket 21 through a first connecting plate 28, the first connecting plate 28 is fixedly installed on the bracket 21, and the end of the linear light source 24 is connected with the first connecting plate 28 through a rotating shaft; the first connecting plate 28 is further provided with a first arc-shaped hole 29, the end of the linear light source 24 is provided with a first guide bolt 30 matched with the first arc-shaped hole 29, and the first guide bolt 30 is located in the first arc-shaped hole 29.

Further, the line scan camera 25 is plural and is installed on a mounting rod 31; the both ends of installation pole 31 are passed through second connecting plate 32 and are connected with support 21, the tip at installation pole 31 is fixed to the one end of second connecting plate 32, the other end and the support 21 of second connecting plate 32 are connected through the pivot, be equipped with second arc hole 33 on the second connecting plate 32, be equipped with on the support 21 with second arc hole 33 assorted second guide bolt 34, second guide bolt 34 is located second arc hole 33.

Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a detection device is small, need not to carry out the upset operation to photovoltaic module, and detection efficiency is high.

Drawings

Fig. 1 is a first schematic perspective view of a visual inspection device for appearance defects of a photovoltaic module based on a line scan camera in an embodiment.

Fig. 2 is a schematic perspective view of a visual inspection apparatus for visual defects of an external appearance of a photovoltaic module based on a line scan camera in an embodiment.

FIG. 3 is a schematic side view of a visual inspection device for defects in the appearance of a photovoltaic module based on a line scan camera in an embodiment.

Fig. 4 is an enlarged schematic view of a portion a of fig. 3.

Fig. 5 is an enlarged schematic view of part B of fig. 3.

In the figure, 10, a photovoltaic module; 11. a conveyor belt; 21. a support; 22. a baffle plate; 23. a dome light source; 24. a line light source; 25. a line scan camera; 26. through the hole; 27. heat dissipation holes; 28. a first connecting plate; 29. a first arcuate aperture; 30. a first guide bolt; 31. mounting a rod; 32. a second connecting plate; 33. a second arcuate aperture; 34. and a second guide bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

At present, after the assembly is laminated, a process for detecting the front side and the back side of the assembly is carried out, so that the parameters and the state of a laminating machine are ensured to be normal, and batch poor lamination does not occur, such as: air bubbles, displaced.

The station adopts a turnover mechanism at present to clamp the assembly, and then after the assembly is turned on one side, a quality inspection worker observes the assembly. The manual detection accuracy is low, the stability is not good, and the overall efficiency is not high.

This scheme reequips on this station assembly line, designs a photovoltaic module appearance imperfections visual inspection device based on camera is swept to line, carries out image acquisition to the positive and negative side, then the image passes through LCD TV display or detects defect analysis through software.

As shown in fig. 1 and 2, the photovoltaic module mainly includes a rack 21 of a cabinet frame structure, the front and rear sides of the rack 21 are covered with a baffle 22, the rack 21 can be installed between two conveyor belts 11, and a through hole 26 is formed in the baffle 22 corresponding to the conveyor belt 11 and used for the photovoltaic module 10 to normally pass through.

A light source and a line scan camera 25 are provided above and below the passing hole 26 in the carriage 21, the light source being close to the passing hole 26.

As shown in fig. 2, 3 and 5, a plurality of line-scan cameras 25 (the specific number is determined according to specific resolution requirements) are all mounted on a mounting rod 31; the both ends of installation pole 31 are passed through second connecting plate 32 and are connected with support 21, the tip at installation pole 31 is fixed to the one end of second connecting plate 32, the other end of second connecting plate 32 is connected through the pivot with support 21, be equipped with second arc hole 33 on the second connecting plate 32, be equipped with on support 21 with second arc hole 33 assorted second guide bolt 34, second guide bolt 34 is located second arc hole 33, can realize the rotation angle regulation under the orbit in second arc hole 33. The angle-adjustable structure is designed here, which can facilitate the angle adjustment of the line-scan camera 25.

The light source passing through the hole 26 is a dome light source 23, and a heat dissipation hole 27 is formed in the baffle plate 22 corresponding to the dome light source 23.

As shown in fig. 1, 2, 3 and 4, the light source below the aperture 26 consists of two sets of linear light sources 24 parallel to each other. Two ends of the linear light source 24 are connected with the bracket 21 through a first connecting plate 28, the first connecting plate 28 is fixedly arranged on the bracket 21, and the end head of the linear light source 24 is connected with the first connecting plate 28 through a rotating shaft; the first connecting plate 28 is further provided with a first arc-shaped hole 29, the end of the linear light source 24 is provided with a first guide bolt 30 matched with the first arc-shaped hole 29, the first guide bolt 30 is located in the first arc-shaped hole 29, rotation angle adjustment can be achieved under the track of the first arc-shaped hole 29, and finally independent angle adjustment of the two groups of linear light sources 24 is achieved.

The working process comprises the following steps: the photovoltaic module flows on the conveying belt 11, does not need to stop, moves according to the previous flowing speed, and can trigger a light source and a camera by adopting a photoelectric switch (or an encoder of a production line) to realize that the system finishes image acquisition in motion.

Description of the principle and effects:

(1) The multi-line scanning camera is arranged below and above the photovoltaic assembly in a line, so that image acquisition is carried out on the lower surface or the upper surface of the photovoltaic assembly moving on the assembly line at the same time, working procedures can be reduced, the efficiency is improved, and flexible matching can be realized by shooting images on the front surface and the back surface.

(2) Flexibly selecting line scanning dome light and line scanning highlight line light for polishing; the glass surface of the front side can be used for shooting glass defects by using dome light, and the surface of the back side can be used for shooting back plate pits by using high-brightness line light; the imaging effect is good, especially the image brightness is even, and the problem of highlight reflection is avoided. If high-brightness line light is used, two lines can be used simultaneously for combined polishing, so that the brightness is increased or some defect characteristics are highlighted.

(3) The resolution can be flexibly adjusted, and the flexible configuration can be carried out according to the number of the cameras and the resolution of a single camera.

(4) The imaging speed is high, the photovoltaic module does not need to stop, the photovoltaic module moves according to the previous flowing speed, and the system finishes image acquisition in the moving process.

(5) The device occupies small space, and can be directly installed on the original production line without changing the original equipment.

(6) The drawing process is based on the movement of the photovoltaic module, and no additional drive and control are added.

(7) Supporting the transverse and vertical flow of the photovoltaic module; the orientation of the photovoltaic modules as they flow on the production line is variable, sometimes laterally and sometimes vertically, and the apparatus is compatible.

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

Claims

1. The utility model provides a photovoltaic module appearance imperfections visual inspection device based on camera is swept to line which characterized in that: including being located support (21) between two conveyer belts (11), support (21) and conveyer belt (11) correspond the department and are equipped with and are used for passing through hole (26) of photovoltaic module (10), all be equipped with light source and line sweep camera (25) above and below through hole (26).

2. The visual inspection device for the appearance defects of the photovoltaic module based on the line scanning camera is characterized in that: the bracket (21) is of a cabinet type frame structure.

3. The visual inspection device of the appearance defects of the photovoltaic module based on the line scanning camera according to claim 2, characterized in that: the front and the back of the support (21) are covered with baffles (22), and the baffles (22) are provided with through holes (26).

4. The visual inspection device for the appearance defects of the photovoltaic module based on the line scanning camera is characterized in that: the baffle (22) is provided with heat dissipation holes (27) at the positions corresponding to the light sources.

5. The visual inspection device for the appearance defects of the photovoltaic module based on the line scanning camera is characterized in that: the light source above the aperture (26) is a dome light source (23).

6. The visual inspection device of the appearance defects of the photovoltaic module based on the line scanning camera according to claim 1, characterized in that: the light source below the through hole (26) consists of two groups of linear light sources (24) which are parallel to each other.

7. The visual inspection device of claim 6 for the appearance defects of the photovoltaic module based on the line scan camera, which is characterized in that: two ends of the linear light source (24) are connected with the bracket (21) through a first connecting plate (28), the first connecting plate (28) is fixedly arranged on the bracket (21), and the end head of the linear light source (24) is connected with the first connecting plate (28) through a rotating shaft; the connecting structure is characterized in that a first arc-shaped hole (29) is further formed in the first connecting plate (28), a first guide bolt (30) matched with the first arc-shaped hole (29) is arranged at the end of the linear light source (24), and the first guide bolt (30) is located in the first arc-shaped hole (29).

8. The visual inspection device for the appearance defects of the photovoltaic module based on the line-scan camera according to any one of claims 1 to 7, characterized in that: the line scanning cameras (25) are multiple and are all arranged on a mounting rod (31); the both ends of installation pole (31) are passed through second connecting plate (32) and are connected with support (21), the tip in installation pole (31) is fixed to the one end of second connecting plate (32), the other end and the support (21) of second connecting plate (32) are connected through the pivot, be equipped with second arc hole (33) on second connecting plate (32), be equipped with on support (21) with second arc hole (33) assorted second guide bolt (34), second guide bolt (34) are located second arc hole (33).