Linear product detection light source and machine vision detection system

Abstract

The utility model relates to the technical field of machine vision detection, and discloses a linear product detection light source and a machine vision detection system, the light source is designed to be arch-shaped according to the shape of a diamond wire, and then two arch-shaped lamp panels which are spaced from each other and have opposite light-emitting surfaces are arranged in a shell; and a diffusion film is arranged in front of the light-emitting surface of each lamp panel, so that carborundum on the diamond wire can be uniformly irradiated, and the color of the carborundum can be distinguished from that of the wire background, so that the wire width of the diamond wire can be detected, the particle number of the carborundum can also be detected, the cutting quality can be ensured, and the production efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machine vision detection, in particular to a detection light source for linear products and a machine vision detection system. Background Art

[0002] With the increasing detection requirements in the photovoltaic industry, strict requirements are put forward for the product quality and production speed of each production link. Especially in the front-end process of silicon wafer production, the requirements for the quality of diamond wire at the silicon rod cutting station are particularly prominent.

[0003] Although the diamond wire is very thin, similar to a hair, the large amount of diamond abrasive attached to its surface plays a decisive role in the cutting quality. The wire width of the diamond wire and the amount of diamond abrasive are directly related to the cutting efficiency of the diamond wire. Therefore, the accurate detection of the wire width of the diamond wire and the number of diamond abrasive particles has become a key link to ensure cutting quality and improve production efficiency.

[0004] The above information is given as background information only to assist in understanding the present disclosure, and does not determine or admit whether any of the above content can be used as the prior art relative to the present disclosure. Summary of the Utility Model

[0005] The utility model provides a detection light source for linear products and a machine vision detection system to solve the problems existing in the prior art.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] In a first aspect, the utility model provides a detection light source for linear products, including:

[0008] A housing, the housing is in an arched structure and forms an arched space;

[0009] Two lamp boards, the two lamp boards are located in the arched space formed by the housing at intervals, and the light-emitting surfaces of the two lamp boards face each other; the lamp boards are in an arched structure;

[0010] Two diffusion membranes, one diffusion membrane is correspondingly arranged in front of the light-emitting surface of one of the lamp boards.

[0011] Further, in the detection light source for linear products, the housing includes an arched plate and two arched end plates;

[0012] The two arched end plates are located at both ends of the arched plate.

[0013] Further, in the detection light source for linear products, the arched plate is provided with an imaging hole.

[0014] Further, in the linear product detection light source, the imaging aperture is located between two diffusion films.

[0015] Further, in the linear product detection light source, the lamp board includes a PCB board and lamp beads;

[0016] A plurality of the lamp beads are detachably arranged on the PCB board.

[0017] Further, in the linear product detection light source, the lamp beads are monochromatic lamp beads or multi-color lamp beads.

[0018] Further, in the linear product detection light source, the light transmittance of the diffusion film is 65% and the haze is 93%.

[0019] In a second aspect, the present utility model provides a machine vision detection system, which includes an image acquisition module and the linear product detection light source provided in the first aspect as described above.

[0020] Further, in the machine vision detection system, the image acquisition module includes an area array camera and a telecentric lens.

[0021] Further, in the machine vision detection system, the object distance of the telecentric lens is 65 mm, and the field of view is 0.92 mm * 0.69 mm.

[0022] Compared with the prior art, the present utility model has the following beneficial effects:

[0023] A linear product detection light source and a machine vision detection system provided by the present utility model design the light source in an arch shape according to the shape of the diamond wire, and then arrange two arch-shaped lamp boards spaced apart from each other and with their light-emitting surfaces facing each other inside the housing, and a diffusion film is arranged in front of the light-emitting surface of each lamp board, so that the diamond sand on the diamond wire can be evenly irradiated, and the color of the diamond sand and the wire body background can be ensured to be distinguishable, thereby enabling the detection of both the wire width of the diamond wire and the number of diamond sand particles, which is beneficial to ensuring the cutting quality and improving the production efficiency.

[0024] The present utility model has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent detailed implementation manners, or will be detailedly described in the accompanying drawings incorporated herein and the subsequent detailed implementation manners. These accompanying drawings and detailed implementation manners are jointly used to explain the specific principles of the present utility model. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 It is a schematic (three-dimensional) diagram of the structure of a linear product detection light source provided by Embodiment 1 of the present invention;

[0027] Figure 2 It is a schematic (front view) diagram of the structure of a linear product detection light source provided by Embodiment 1 of the present invention;

[0028] Figure 3 It is a schematic (sectional view) diagram of the structure of a linear product detection light source provided by Embodiment 1 of the present invention;

[0029] Figure 4 It is a schematic (front view) diagram of the structure of a machine vision detection system provided by Embodiment 2 of the present invention;

[0030] Figure 5 It is a schematic (side view) diagram of the structure of a machine vision detection system provided by Embodiment 2 of the present invention.

[0031] Reference numerals:

[0032] Housing 1, lamp board 2, diffusion film 3, imaging hole 4, image acquisition module 5, linear product 6;

[0033] Arch-shaped plate 11, arch-shaped end plate 12;

[0034] Camera 51. Detailed implementation manners

[0035] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects, etc. of the present application, the following will be described in detail with reference to the specific embodiments listed and in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0036] Reference to "embodiment" in this document means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the various technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0037] Unless otherwise defined, the meanings of the technical terms used in this document are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of the relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0038] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this document generally represents an "or" logical relationship between the associated objects before and after.

[0039] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary, or sequential relationships between these entities or operations.

[0040] Without further limitation, in this application, the use of "comprising", "including", "having", or other similar expressions in a statement is intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method, or product that includes the said elements. Thus, a process, method, or product that includes a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such a process, method, or product.

[0041] The same as the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the number itself; expressions such as "above", "below", "within", etc. are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "multiple" is two or more (including two), and similar expressions related to "many" are understood in the same way, such as "multiple groups", "multiple times", etc., unless otherwise specifically defined.

[0042] In the description of the embodiments of the present application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the attached drawings. It is only for the convenience of describing the specific embodiments of the present application or facilitating the understanding of the readers, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0043] Unless otherwise clearly specified or limited, in the description of the embodiments of the present application, the terms such as "installed", "connected", "coupled", "fixed", "set", etc. shall be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium; it may be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] Embodiment 1

[0045] In view of the defects existing in the above-mentioned prior art, based on the rich practical experience and professional knowledge in the design and manufacturing of this field for many years, and in cooperation with the application of theory, the applicant actively conducts research and innovation in the hope of creating a technology that can solve the defects in the prior art. After continuous research, design, and repeated sample making and improvement, a truly practical and valuable utility model has finally been created.

[0046] Please refer to Figures 1 - 3 , the embodiment of the present utility model provides a linear product detection light source, and its design purpose is to improve the accuracy and efficiency of the quality detection of diamond wires. This detection light source mainly includes the following parts:

[0047] First, there is a housing 1 in an arched structure, and this housing 1 forms an arched space. This arched design is optimized based on the shape of the diamond wire to better adapt to and illuminate the diamond wire.

[0048] Secondly, inside the arched space formed by the housing 1, there are two spaced-apart lamp boards 2. These two lamp boards 2 are also in an arched structure, and their light-emitting surfaces face each other. This layout enables the light source to evenly irradiate the diamond wire (i.e., Figure 1Each part of the thick line passing through the housing 1 is ensured to have accurate detection results. Specifically, due to the arc of the diamond wire, if the light source irradiates from the front and back sides of the diamond wire, there will be relatively thin bright line spots, and the particles of diamond abrasive cannot be evenly irradiated. However, if the light source irradiates from the left and right sides of the diamond wire, the particles can be evenly irradiated.

[0049] In addition, a diffusion film 3 is provided in front of the light-emitting surface of each lamp board 2. The function of the diffusion film 3 is to diffuse and homogenize the light emitted by the lamp board 2, preventing the diamond abrasive on the diamond wire and the background color of the wire body from being difficult to distinguish due to too strong or too weak light. Through the filtering and diffusion effects of the diffusion film, the diamond abrasive on the diamond wire can be evenly and clearly irradiated, facilitating subsequent detection and analysis. Specifically, when irradiating from the left and right sides of the diamond wire, although the particles can be evenly irradiated, the background of the wire body of the diamond wire will be black, and the wire width of the diamond wire cannot be detected. Therefore, it is selected to add a diffusion film to allow part of the light to be diffusely reflected onto the wire body, making the wire body appear gray and the diamond abrasive particles appear white, so that the wire body and the diamond abrasive particles can be distinguished.

[0050] Through the design of this embodiment, not only can the diamond abrasive on the diamond wire be evenly irradiated, but also the colors of the diamond abrasive and the wire body background can be effectively distinguished. In this way, both the wire width of the diamond wire and the number of diamond abrasive particles can be detected, providing strong support for the comprehensive evaluation of the quality of the diamond wire. Finally, this design is beneficial to ensuring the cutting quality, improving the production efficiency, and meeting the urgent needs of the photovoltaic industry for high-quality diamond wire.

[0051] It can be understood that for other linear products, the detection light source provided by this embodiment can be well compatible.

[0052] Please refer to again Figure 1 and 3 In this embodiment, the structure of the housing 1 is further refined. Specifically, the housing 1 is mainly composed of an arched plate 11 and two arched end plates 12. The arched plate 11 is the main part of the housing, forming a main arched space for accommodating and supporting the lamp board 2. The two arched end plates 12 are respectively located at both ends of the arched plate 11, playing the role of strengthening the housing 1 and closing both ends of the housing 1.

[0053] This design not only enhances the stability and structural strength of the housing 1, but also helps to improve the lighting effect of the light source. Through the combination of the arched plate 11 and the arched end plates 12, a complete arched structure is formed, enabling the light source to better adapt to the shape of the diamond wire and achieve more uniform and accurate irradiation.

[0054] In addition, this design also takes into account the ease of use and maintainability of the light source. The presence of the arched end plates 12 makes the two ends of the housing 1 form openings, facilitating the installation, replacement, and maintenance of the lamp panel 2 and the diffusion film 3. At the same time, the connection between the arched plate 11 and the arched end plates 12 can also adopt a detachable design, further improving the flexibility and maintainability of the light source.

[0055] Please refer again to Figure 1 and 3 , in this embodiment, the arched plate 11 is further designed with an imaging hole 4. The purpose of this design is to allow the image acquisition module to capture and acquire images of the diamond wire through the imaging hole 4. Through the imaging hole 4, clear images of the diamond wire can be obtained in real time, facilitating the accurate measurement and analysis of key parameters such as the wire width of the diamond wire and the number of abrasive grains of the diamond powder.

[0056] The position and size of the imaging hole 4 will be carefully designed to ensure that the image acquisition module can capture the best image quality and sufficient detailed information. At the same time, the shape and edge of the imaging hole 4 will also be optimized to reduce light scattering and interference, improving the clarity and contrast of the image.

[0057] This design enables the linear product detection light source provided by the embodiment of the present utility model to not only have an efficient lighting function but also be seamlessly docked with the image acquisition device, realizing the automatic detection and analysis of the quality of the diamond wire. This greatly improves the detection efficiency and accuracy, providing strong technical support for the production process of the photovoltaic industry.

[0058] Please refer again to Figure 3 , in this embodiment, the imaging hole 4 is located between the two diffusion films 3.

[0059] It should be noted that designing the imaging hole 4 between the two diffusion films 3 is a clever and practical choice. This layout ensures that the image acquisition module can capture the light evenly diffused by the diffusion film 3 through the imaging hole 4, thereby obtaining clear images of the diamond wire.

[0060] In this embodiment, a more detailed elaboration is made on the structure and function of the lamp panel 2. The lamp panel 2 is mainly composed of a PCB board (printed circuit board) and lamp beads. This design allows the lamp beads to be set on the PCB board in a pluggable manner, providing great convenience for the assembly and maintenance of the light source.

[0061] First of all, the PCB board, as the carrier of the lamp beads, provides stable electrical connection and mechanical support. Through the circuit layout on the PCB board, precise control and power supply of the lamp beads can be achieved.

[0062] Secondly, the lamp beads, as the core components of the light source, are responsible for emitting light. These lamp beads can exist in the form of single-color or multi-color to meet different lighting requirements. Single-color lamp beads can provide stable and uniform lighting effects and are suitable for occasions with high requirements for color consistency; while multi-color lamp beads can achieve flexible adjustment and optimization of the light source by adjusting the light output of different colors.

[0063] In addition, the pluggable design of the lamp beads makes the assembly and maintenance of the light source simpler and more efficient. When the lamp beads need to be replaced or repaired, simply unplug the faulty lamp beads from the PCB board and then insert new lamp beads, without the need to disassemble or replace the entire lamp board. This not only reduces the maintenance cost but also improves the availability and reliability of the equipment.

[0064] In this embodiment, the light transmittance and haze of the diffusion film 3 are specifically set to 65% and 93%. The selection of these two parameters is based on in-depth understanding and precise calculation of the requirements for the quality inspection of the diamond wire.

[0065] A light transmittance of 65% means that the diffusion film allows approximately 65% of the light to pass through. This ratio not only ensures sufficient light intensity to illuminate the diamond wire but also avoids glare or shadows caused by excessive light intensity, thus ensuring the clarity and contrast of the detection image.

[0066] A haze of 93% reflects the light scattering ability of the diffusion film. High haze means that the light will be evenly scattered after passing through the diffusion film, which helps to eliminate light spots and bright points, enabling every detail on the diamond wire to be clearly presented. This is crucial for detecting the wire width of the diamond wire and the number of diamond abrasive grains.

[0067] By combining these two parameters, the diffusion film 3 can achieve uniform scattering of light while maintaining sufficient light intensity, thereby ensuring the accuracy and reliability of the diamond wire quality inspection.

[0068] Although terms such as housing, lamp board, diffusion film, imaging hole, etc. are used more frequently in this application, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

[0069] A linear product detection light source provided by the present utility model designs the light source as an arch according to the shape of the diamond wire, then arranges two arched lamp boards spaced apart from each other and with their light-emitting surfaces facing each other inside the housing, and a diffusion film is arranged in front of the light-emitting surface of each lamp board, so that the diamond abrasive on the diamond wire can be evenly irradiated, and the color of the diamond abrasive and the wire body background can be ensured to be distinguishable from each other, so that both the wire width of the diamond wire and the number of diamond abrasive grains can be detected, which is beneficial to ensuring the cutting quality and improving the production efficiency.

[0070] Embodiment 2

[0071] Please refer to Figures 4 - 5 , the embodiment of the present utility model provides a machine vision detection system, which includes an image acquisition module 5 and a linear product detection light source provided in the above-mentioned Embodiment 1.

[0072] It should be noted that this integrated design aims to improve the efficiency and accuracy of the machine vision detection system, especially when performing quality detection on linear products 6 such as diamond wires.

[0073] As the core part of the system, the image acquisition module 5 is responsible for capturing the image information of the target object. In this embodiment, the image acquisition module 5 can be a high-resolution camera that can capture the detailed features of the diamond wire. By cooperating with the linear product detection light source, the image acquisition module 5 can obtain clear and uniform images of the diamond wire, providing a reliable data basis for subsequent quality detection.

[0074] The linear product detection light source, as described in the above-mentioned Embodiment 1, has a unique arched design and a double lamp board configuration. By adjusting the brightness and angle of the light source, it can ensure that the diamond wire presents the best lighting effect in the image acquisition module 5. In addition, the application of the diffusion film 3 makes the light more uniform, helping to eliminate shadows and reflection phenomena, and further improving the image quality.

[0075] This machine vision detection system combines advanced image acquisition technology and optimized light source design, making the quality detection of linear products 6 such as diamond wires more efficient and accurate. The system can automatically identify key parameters such as the wire width of the diamond wire and the number of abrasive grains, and perform precise measurement and data analysis. This can not only reduce errors caused by human factors, but also improve the detection speed and meet the requirements of large-scale production lines.

[0076] In summary, the machine vision detection system provided by the embodiment of the present utility model has the advantages of reasonable structure, powerful function, and simple operation, providing a reliable solution for the quality detection of linear products 6 such as diamond wires. This system can be widely applied in industries such as photovoltaic, electronics, and machinery, and is of great significance for improving product quality and production efficiency.

[0077] Please refer to again Figures 4 - 5 , in this embodiment, the image acquisition module 5 is further refined to include a combination of an area array camera 51 and a telecentric lens 52. This configuration significantly improves the performance and accuracy of the machine vision detection system.

[0078] The area array camera 51, as a key component for image acquisition, features high resolution, high sensitivity, and fast imaging. It can capture the fine features of linear products such as wire saws 6 and complete the transmission and processing of image data at an extremely high speed. This enables the detection system to obtain the quality information of the product in real time and accurately, providing a solid foundation for subsequent analysis and processing.

[0079] The telecentric lens 52 is responsible for focusing light on the photosensitive element of the camera to form a clear image. The design of the telecentric lens can eliminate the reading errors caused by inaccurate focusing or object displacement, ensuring the accuracy and reliability of the measurement results. When detecting linear products such as wire saws 6, the telecentric lens 52 can effectively reduce the image distortion caused by light refraction and reflection, further improving the image quality and detection accuracy.

[0080] The image acquisition module 5 combining the area array camera 51 and the telecentric lens 52 not only has the ability to acquire images at high speed and with high sensitivity, but also can ensure the accuracy and stability of the measurement results. This makes the entire machine vision detection system more suitable for the quality detection scenarios of linear products such as wire saws 6, improving the detection efficiency and quality, and providing strong technical support for the production and development of related industries.

[0081] In this embodiment, the object distance and field of view of the telecentric lens 52 are specifically set to 65 mm and 0.92 mm * 0.69 mm. The selection of these two parameters is crucial for the performance of the machine vision detection system.

[0082] The object distance, that is, the distance between the lens and the object being photographed, is 65 mm. This design enables the lens to clearly image linear products such as wire saws at an appropriate distance, ensuring both a sufficient imaging range and avoiding image distortion or blurring caused by being too close or too far away.

[0083] The field of view, that is, the size of the area where the lens can clearly image, is 0.92 mm * 0.69 mm. This size design enables the detection system to accurately capture the key parts and detailed features of the wire saw, providing an accurate data basis for subsequent quality detection. At the same time, an appropriate field of view range also helps to improve the efficiency and stability of the detection system, reducing false detections or missed detections caused by too large or too small a field of view.

[0084] A machine vision inspection system provided by the utility model designs the light source as an arch according to the shape of the diamond wire, and then arranges two arch-shaped lamp boards which are spaced apart from each other and have their light-emitting surfaces facing each other inside the housing, and a diffusion film is arranged in front of the light-emitting surface of each lamp board, so that the diamond sand on the diamond wire can be evenly irradiated, and the color of the diamond sand and the wire body background can be ensured to be distinguished from each other, so that both the wire width of the diamond wire and the number of particles of the diamond sand can be detected, which is beneficial to ensuring the cutting quality and improving the production efficiency.

[0085] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solutions generated by equivalent structure or equivalent process substitution or modification using the content recorded in the text and drawings of the specification of the present application based on the essential concept of the present application, as well as the direct or indirect implementation of the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. A linear product detection light source, characterized in that, Comprising: A housing (1), the housing (1) having an arched structure and forming an arched space; Two light panels (2), the two light panels (2) being spaced apart from each other and located within the arched space formed by the housing (1), and the light-emitting surfaces of the two light panels (2) being arranged facing each other; the light panel (2) having an arched structure; Two diffusion films (3), one diffusion film (3) being correspondingly arranged in front of the light-emitting surface of one light panel (2).

2. The linear product detection light source according to claim 1, wherein The housing (1) includes an arched plate (11) and two arched end plates (12); The two arched end plates (12) are located at both ends of the arched plate (11).

3. The linear product detection light source according to claim 2, characterized in that, The arched plate (11) is provided with an imaging hole (4).

4. The linear product detection light source according to claim 3, characterized in that, The imaging hole (4) is located between the two diffusion films (3).

5. The linear product detection light source according to claim 1, wherein The light panel (2) includes a PCB board and lamp beads; A plurality of the lamp beads are detachably arranged on the PCB board.

6. The linear product detection light source according to claim 5, characterized in that, The lamp beads are monochromatic lamp beads or multi-color lamp beads.

7. The linear product detection light source according to claim 1, characterized in that, The light transmittance of the diffusion film (3) is 65% and the haze is 93%.

8. A machine vision inspection system, characterized in that, Comprising an image acquisition module (5) and a linear product detection light source as described in any one of claims 1-7.

9. The machine vision inspection system according to claim 8, wherein, The image acquisition module (5) includes an area array camera (51) and a telecentric lens (52).

10. The machine vision inspection system according to claim 9, characterized in that, The object distance of the telecentric lens (52) is 65 mm and the field of view is 0.92 mm * 0.69 mm.

Images