Detection light source and pin detection device

Abstract

The utility model relates to the technical field of machine vision detection, and discloses a detection light source and pin detection device, which comprises an annular shell, a first light emitting assembly and a second light emitting assembly, the annular shell is provided with a through detection hole, and the first light emitting assembly is installed in the detection hole and emits light downwards; the second light emitting assembly comprises a light emitting slit formed in the annular shell and a second lamp bead used for emitting light to the light emitting slit, and the light emitting slit is parallel to the bottom side face of the first light emitting assembly. According to the detection light source and the pin detection device, the detection accuracy of the pins of the workpiece can be improved.

Description

Technical Field

[0001] This utility model relates to the field of machine vision inspection technology, and in particular to an inspection light source and a pin inspection device. Background Technology

[0002] Machine vision uses machines to perform measurements and judgments instead of human eyes. It involves capturing images of a target using a camera, transmitting the images to a dedicated image processing system. This system converts the images into digital signals based on pixel distribution, brightness, color, and other information to detect defects in the workpiece. In modern automated production processes, machine vision systems are widely used in areas such as process monitoring, finished product inspection, and quality control.

[0003] Different products require different light sources for inspection. Taking pins in electronic products as an example, a planar light source typically shines light downwards onto the pin location on the workpiece, and then a camera captures the image to check for pin misalignment, deformation, or breakage, etc. However, under planar light, it is difficult to highlight the pin tips, resulting in low inspection accuracy.

[0004] Therefore, it is necessary to design a detection light source and pin detection device to improve the detection accuracy of pins.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] This invention provides a detection light source and a pin detection device, which can improve the accuracy of pin detection.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A detection light source includes an annular housing, a first light-emitting component, and a second light-emitting component;

[0009] The annular housing has a through detection hole, and the first light-emitting component is installed in the detection hole and emits light downwards;

[0010] The second light-emitting component includes a light-emitting slit disposed on the annular housing, a second lamp bead for emitting light into the light-emitting slit, and the light-emitting slit is parallel to the bottom side surface of the first light-emitting component.

[0011] Optionally, the first light-emitting component includes a light guide plate, a first group of LED beads, and a circuit board;

[0012] The light guide plate is installed in the detection hole, and the first lamp bead in the first lamp bead group surrounds the light guide plate.

[0013] The first LED is mounted on the circuit board.

[0014] Optionally, the second light-emitting component further includes a condensing lens, the number of which is the same as the number of the second lamp beads, and the condensing lens is installed on the light-emitting side of the corresponding second lamp bead.

[0015] Optionally, the focusing lens is located between the light-emitting slit and the second lamp bead.

[0016] Optionally, both the first LED and the second LED are mounted on the circuit board.

[0017] Optionally, the detection hole is a rectangular hole, and the circuit board has four corresponding rectangular holes.

[0018] Optionally, the annular housing has a first annular surface and a second annular surface, the first annular surface being parallel to the second annular surface, and the light-emitting slit being formed between the first annular surface and the second annular surface;

[0019] The first annular surface is parallel to the bottom side surface of the first light-emitting component.

[0020] Optionally, a heat sink is provided on the outer periphery of the annular housing, and a cooling fan is provided on the side of the annular housing.

[0021] Optionally, a reflective recess is formed on the top surface of the light guide plate, the reflective recess is filled with a reflective material, and the top surface of the reflective material is coated with a light-absorbing material.

[0022] A pin detection device includes a detection light source as described in any of the preceding claims.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The detection light source and pin detection device provided by this utility model have a first light-emitting component that illuminates the workpiece downwards, and then a second light-emitting component that emits light through a light-emitting slit, thereby forming a local bright area at the pin tip of the workpiece. This makes it easier for the camera to take pictures and detect the pin tip of the workpiece. After the pin is skewed, deformed or broken, the number and position of the local bright area will change significantly, which helps to improve the detection accuracy.

[0025] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a top view schematic diagram of the detection light source provided in an embodiment of this utility model;

[0028] Figure 2 yes Figure 1 A schematic diagram of the AA cross-sectional structure of the detection light source;

[0029] Figure 3 yes Figure 2 A magnified schematic diagram of a portion of the detection light source.

[0030] Reference numerals: 1. Annular housing; 101. Detection hole; 102. Heat sink; 2. First light-emitting assembly; 21. Light guide plate; 22. First LED bead; 23. Circuit board; 3. Second light-emitting assembly; 301. First annular surface; 302. Second annular surface; 31. Light-emitting slit; 32. Second LED bead; 33. Condensing lens; 4. Cooling fan. Detailed Implementation

[0031] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0032] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0034] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0035] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0036] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0037] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0038] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply 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, they should not be construed as limitations on the embodiments of this application.

[0039] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] Example 1

[0041] In view of the aforementioned deficiencies in existing detection light sources, the applicant, based on years of extensive practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theoretical principles, has actively conducted research and innovation in order to create a technology that can overcome the deficiencies in the existing technology and make the detection light source more practical. After continuous research, design, and repeated prototype production and improvement, this utility model with real practical value has finally been created.

[0042] Please refer to Figures 1 to 3 This utility model embodiment provides a detection light source, including an annular housing 1, a first light-emitting component 2, and a second light-emitting component 3. The annular housing 1 serves a supporting function.

[0043] The annular housing 1 has a through detection hole 101. The first light-emitting component 2 is installed in the detection hole 101 and emits light downwards, thereby illuminating the workpiece from top to bottom. At this time, the pins of the workpiece are vertically upwards.

[0044] The second light-emitting component 3 includes a light-emitting slit 31 disposed on the annular housing 1 and a second lamp bead 32 for emitting light through the light-emitting slit 31, with the light-emitting slit 31 parallel to the bottom side of the first light-emitting component 2. The second light-emitting component 3 emits light through the light-emitting slit 31, forming a local bright area at the tip of the workpiece's pin, thus making it easier for the camera to photograph and detect the tip of the workpiece. After the pin is misaligned, deformed, or broken, the number and position of the local bright area will change significantly, which helps to improve the detection accuracy.

[0045] In this embodiment, the detection light source first illuminates the top of the workpiece through the first light-emitting component 2, and then illuminates the pin tip laterally through the second light-emitting component 3, thereby effectively improving the accuracy of pin detection.

[0046] Optionally, the first light-emitting component 2 includes a light guide plate 21, a group of first LED beads 22, and a circuit board 23; the light guide plate 21 is installed in the detection hole 101, and the first LED beads 22 in the group of first LED beads 22 surround the light guide plate 21; the first LED beads 22 are installed on the circuit board 23. A reflective recess is formed on the top surface of the light guide plate 21, the reflective recess is filled with reflective material, and the top surface of the reflective material is coated with a light-absorbing material.

[0047] In this embodiment, the first LED bead 22 projects light into the interior of the light guide plate 21 from all sides. The light is reflected by the reflective material in the light-emitting recess, causing the light to shine downwards onto the workpiece. The camera is positioned at the top of the light guide plate 21 and takes pictures of the workpiece through the light guide plate 21. The light-absorbing material effectively avoids reflection problems and improves image quality.

[0048] Optionally, the second light-emitting assembly 3 further includes a condensing lens 33, the number of which is the same as the number of second lamp beads 32, and the condensing lenses 33 are installed on the light-emitting side of the corresponding second lamp beads 32. The light emitted from the second lamp beads 32 is focused by the condensing lenses 33 and then emitted from the light-emitting slit 31, thereby improving the light intensity. Optionally, the condensing lens 33 is located between the light-emitting slit 31 and the second lamp beads 32, making the focusing effect of the condensing lens 33 better.

[0049] Optionally, both the first LED 22 and the second LED 32 are mounted on the circuit board 23, which helps to reduce the difficulty of installation.

[0050] Optionally, in this embodiment, the detection hole 101 is a rectangular hole, and the circuit board 23 is provided with four rectangular holes.

[0051] Optionally, the annular housing 1 has a first annular surface 301 and a second annular surface 302, the first annular surface 301 being parallel to the second annular surface 302, and a light-emitting slit 31 being formed between the first annular surface 301 and the second annular surface 302; the first annular surface 301 is parallel to the bottom side surface of the first light-emitting component 2. Preferably, the distance between the first annular surface 301 and the second annular surface 302 is not greater than 0.5 mm.

[0052] Optionally, a heat sink 102 is provided on the outer periphery of the annular housing 1, and a cooling fan 4 is provided on the side of the annular housing 1. The heat sink 102 increases the heat dissipation area and improves the heat dissipation effect on the circuit board 23.

[0053] Example 2

[0054] A pin detection device includes a detection light source as described in any of the preceding claims. Figure 2 As shown, the camera is located on the top side of the light guide plate 21.

[0055] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A detection light source, characterized in that, It includes an annular housing (1), a first light-emitting component (2), and a second light-emitting component (3); The annular housing (1) has a through detection hole (101), and the first light-emitting component (2) is installed in the detection hole (101) and emits light downwards; The second light-emitting component (3) includes a light-emitting slit (31) disposed on the annular housing (1) and a second lamp bead (32) for emitting light into the light-emitting slit (31), and the light-emitting slit (31) is parallel to the bottom side surface of the first light-emitting component (2).

2. The detection light source according to claim 1, characterized in that, The first light-emitting component (2) includes a light guide plate (21), a first group of LED beads, and a circuit board (23); The light guide plate (21) is installed in the detection hole (101), and the first lamp bead (22) in the first lamp bead group surrounds the light guide plate (21); The first LED (22) is mounted on the circuit board (23).

3. The detection light source according to claim 1, characterized in that, The second light-emitting component (3) further includes a condenser lens (33), the number of which is the same as the number of the second lamp beads (32), and the condenser lens (33) is installed on the light-emitting side of the corresponding second lamp bead (32).

4. The detection light source according to claim 3, characterized in that, The focusing lens (33) is located between the light-emitting slit (31) and the second lamp bead (32).

5. The detection light source according to claim 2, characterized in that, The first LED (22) and the second LED (32) are both mounted on the circuit board (23).

6. The detection light source according to claim 2, characterized in that, The detection hole (101) is a rectangular hole, and the circuit board (23) has four corresponding rectangular holes.

7. The detection light source according to claim 1, characterized in that, The annular shell (1) has a first annular surface (301) and a second annular surface (302), the first annular surface (301) is parallel to the second annular surface (302), and the light-emitting slit (31) is formed between the first annular surface (301) and the second annular surface (302); The first annular surface (301) is parallel to the bottom side surface of the first light-emitting component (2).

8. The detection light source according to claim 1, characterized in that, The annular housing (1) is provided with heat sinks (102) on its outer periphery, and a cooling fan (4) is provided on the side of the annular housing (1).

9. The detection light source according to claim 2, characterized in that, The top surface of the light guide plate (21) forms a reflective recess, which is filled with reflective material, and the top surface of the reflective material is coated with a light-absorbing material.

10. A pin detection device, characterized in that, It includes a detection light source as described in any one of claims 1 to 9.

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