Crack light source and visual inspection device
Through the design of the slot light source, the invisibility problem of parts caused by improper light source selection is solved, accurate detection of small parts positions is achieved, and detection accuracy is improved.
Patent Information
- Application Number
- CN202422423578.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-08
AI Technical Summary
In the prior art, improper selection of light sources causes the parts to be detected to be invisible in the image, making it difficult to accurately determine their position, especially small and easily reflective parts such as PIN pins, resulting in detection errors.
A light source is designed to form a light-out slit by setting up a light-out slit upper plate and a light-out slit lower plate, so that light can only be illuminated through the slit, avoiding light diffusion and illuminating only the area where the parts are located.
It improves the appearance of parts in the image, reduces misjudgment, and ensures accurate detection of small parts' positions, especially the number and position judgment of PIN pins.
Smart Images
Figure CN223229464U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of visual detection, in particular to a gap light source and a visual detection device. Background Art
[0002] In order to ensure the production quality and pass rate of products, many products must be inspected after production. In the existing technology, images are generally captured by machine vision products (i.e. image acquisition devices, which are divided into CMOS and CCD). The image is then transmitted to the processing unit for digital processing, and the size, shape, color, etc. are judged based on pixel distribution, brightness, color and other information.
[0003] Therefore, capturing product images is crucial. Clear and vivid images can enable more accurate judgments. When photographing products, a light source is usually needed to illuminate the product to make the captured image clearer, so the choice of light source is also very important. However, some products will make the parts to be inspected "invisible" after being illuminated. Specifically, the difference between the parts to be inspected and other areas in the image is too small or even no difference, resulting in the user being unable to determine the specific location of the parts to be inspected based on the image, and errors are prone to occur. Therefore, there is an urgent need for a light source that can only illuminate the parts to be inspected.
[0004] For example, the number and position of PIN pins used in electronic components need to be detected after the electronic components are produced. When the light source illuminates the entire surface of the product, the PIN pins are too small and will produce reflections, resulting in the inability to accurately determine the position of the PIN pins in the captured image, making it inconvenient to detect the PIN pins. Utility Model Content
[0005] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a gap light source and a visual inspection device to solve the technical problem of inconvenient component inspection in the prior art.
[0006] The utility model adopts the following technical solution to realize: a slot light source, comprising a bottom plate, a main light plate, an upper light-emitting surface plate, a lower light-emitting surface plate and a cover plate;
[0007] The bottom plate is a hollow structure, and a receiving groove is provided on the inner side of the bottom plate. The bottom of the receiving groove is provided with a first step and a second step, and the first step is higher than the second step;
[0008] The main light panel is arranged on the first step, and the light-emitting side of the main light panel faces the center of the bottom plate;
[0009] The light-emitting surface lower plate is arranged on the second step;
[0010] The cover plate is a hollow structure, and the cover plate is arranged on the top of the bottom plate;
[0011] The upper light-emitting surface plate is arranged at the lower end of the cover plate, the upper light-emitting surface plate is located in the accommodating groove, and the upper light-emitting surface plate is located directly above the lower light-emitting surface plate, and a light-emitting gap is formed between the upper light-emitting surface plate and the lower light-emitting surface plate.
[0012] In a possible implementation manner, there are two main light panels, and the two main light panels are arranged opposite to each other.
[0013] In a possible embodiment, a secondary light panel is further included, wherein the secondary light panel is electrically connected to the main light panel, and the light panel is arranged at a corner of the bottom panel.
[0014] In a possible implementation manner, there are four auxiliary light panels, and the four auxiliary light panels are respectively arranged at four corners of the bottom plate.
[0015] In a possible embodiment, a first extension portion is provided at both ends of the upper plate of the light emitting surface, and a second extension portion is provided at both ends of the lower plate of the light emitting surface, and the first extension portion and the second extension portion form a light emitting gap corresponding to the auxiliary light panel.
[0016] In a possible implementation manner, a first connection hole is provided on the second step, and a second connection hole corresponding to the first connection hole is provided on the lower plate of the light emitting surface.
[0017] In a possible implementation manner, a third connection hole is provided on the cover plate, and a fourth connection hole corresponding to the third connection hole is provided on the light emitting surface upper plate.
[0018] In a possible implementation, the device further includes a power cord connected to the main light board.
[0019] In a possible implementation manner, a wire groove is provided on the bottom plate, the wire groove is communicated with the accommodating groove, and the wire groove is used for allowing the power line to pass through.
[0020] A visual inspection device includes the above-mentioned slit light source and a CCD camera, wherein the CCD camera is arranged directly above the hollow area of the slit light source.
[0021] Compared with the existing technology, the beneficial effect of the present invention is that: by setting the upper plate and the lower plate of the light-emitting surface to form a light-emitting gap, the light emitted by the lamp board can only be irradiated through the light-emitting gap, so that the light can only illuminate a light surface of the same size as the light-emitting gap, avoiding the diffusion of light, so that only the part of the product that extends into the light surface will be illuminated, and other parts will not be affected by the light, which provides convenience for some parts that are inconvenient to detect. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic structural diagram of the slit light source of the present utility model;
[0023] Figure 2 This is an exploded schematic diagram of the slit light source of the present invention;
[0024] Figure 3 This is a cross-sectional view of the slit light source of the present invention;
[0025] Figure 4 This is a structural diagram of the bottom plate of the slotted light source of the present invention.
[0026] In the picture:
[0027] 100, bottom plate; 101, receiving slot; 102, first step; 103, second step; 104, first connection hole; 105, wire trough;
[0028] 200, main light board; 201, power cord;
[0029] 300, light-emitting surface upper panel; 301, first extension portion; 302, fourth connection hole;
[0030] 400, light-emitting surface lower plate; 401, second extension portion; 402, second connection hole;
[0031] 500, cover plate; 501, third connecting hole;
[0032] 600. The gap between the light and the light;
[0033] 700, auxiliary light panel. DETAILED DESCRIPTION
[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0035] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0036] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0037] like Figure 1-4 The slit light source shown in the figure includes a bottom plate 100, a main light plate 200, a light-emitting surface upper plate 300, a light-emitting surface lower plate 400 and a cover plate 500; the bottom plate 100 is a hollow structure, and a receiving groove 101 is provided on the inner side of the bottom plate 100, and a first step 102 and a second step 103 are provided at the bottom of the receiving groove 101, and the first step 102 is higher than the second step 103; the main light plate 200 is arranged on the first step 102, and the light-emitting side of the main light plate 200 faces Toward the center position of the base plate 100; the light-emitting surface lower plate 400 is arranged on the second step 103; the cover plate 500 is a hollow structure, and the cover plate 500 is arranged at the top of the base plate 100; the light-emitting surface upper plate 300 is arranged at the lower end of the cover plate 500, the light-emitting surface upper plate 300 is located in the receiving groove 101, and the light-emitting surface upper plate 300 is located directly above the light-emitting surface lower plate 400, and a light-emitting gap 600 is formed between the light-emitting surface upper plate 300 and the light-emitting surface lower plate 400. It should be noted that since the base plate 100 and the cover plate 500 are both hollow structures, the hollow area of the slit light source can form a light surface under the illumination of the main light board 200. The setting of the first step 102 can provide an installation basis for the main light board 200, and the setting of the second step 103 can provide an installation basis for the installation of the lower plate 400 of the light-emitting surface, which is beneficial to improving the stability of the overall structure of the light source. In addition, a plurality of lamp beads are evenly spaced on the main light board 200. The light emitted by the lamp beads is infrared light, which is beneficial to improve the distinction between the irradiated part and other parts of the product, making the features displayed on the image more obvious, so that the user can judge more clearly. Specifically, the height of the light-emitting slit 600 is 0.2 mm, so that small parts can still be accurately illuminated, greatly reducing the impact of light on the unilluminated parts of the product. In addition, the height of the light-emitting slit 600 can be freely set according to actual needs. The user only needs to change the thickness of the upper plate 300 of the light-emitting surface or the lower plate 400 of the light-emitting surface to change the height of the light-emitting slit 600.
[0038] The beneficial effect of the present invention is that: by arranging the upper plate 300 of the light emitting surface and the lower plate 400 of the light emitting surface to cooperate to form a light emitting gap 600, the light emitted by the lamp board can only be irradiated through the light emitting gap 600, so that the light can only illuminate a light surface of the same size as the light emitting gap 600, avoiding the diffusion of light, so that only the part of the product extending into the light surface will be illuminated, and other parts will not be affected by the light, which provides convenience for some parts that are inconvenient to detect.
[0039] Please refer to Figure 3 In one possible embodiment, there are two main light panels 200, and the two main light panels 200 are arranged opposite each other. It should be noted that when there are multiple parts to be illuminated and they are arranged side by side, the two main light panels 200 are arranged opposite each other to prevent mutual shading between the parts, which is conducive to improving the comprehensiveness of the light source illumination. In addition, the mutual illumination of the two main light panels 200 can also increase the brightness of the light surface formed by the light emitting gap 600, which is conducive to increasing the light intensity of the parts, thereby making the light spots of the parts in the image more obvious, facilitating more accurate judgment by the user.
[0040] Please refer to Figure 2 In one possible embodiment, a secondary light panel 700 is further included. The secondary light panel 700 is electrically connected to the main light panel 200 and is disposed at a corner of the base plate 100. It is readily understood that the provision of the secondary light panel 700 can further enhance the brightness of the light surface formed by the light emitting slit 600 and can illuminate the blind area at the end of the main light panel 200, thereby improving the comprehensiveness of the light source's illumination of the parts to be inspected on the product.
[0041] Please refer to Figure 2 In one possible embodiment, there are four auxiliary light panels 700, which are respectively disposed at the four corners of the base plate 100. It is easy to understand that disposing four auxiliary light panels 700 at the four corners of the base plate 100 can maximize the comprehensiveness of the light source illumination and avoid the situation where multiple parts are blocked and cannot be illuminated.
[0042] Please refer to Figure 2 In one possible embodiment, first extensions 301 are provided at both ends of the upper light-emitting surface plate 300, and second extensions 401 are provided at both ends of the lower light-emitting surface plate 400. The first extensions 301 and the second extensions 401 form a light-emitting slit 600 corresponding to the auxiliary light panel 700. It is easy to understand that the first extensions 301 and the second extensions 401 both correspond to the corners of the bottom plate 100, so that light emitted by the auxiliary light panel 700 can only be emitted through the light-emitting slit 600, ensuring the consistency of the light-emitting surfaces of the main light panel 200 and the auxiliary light panel 700.
[0043] Please refer to Figure 2In one possible embodiment, a first connection hole 104 is provided on the second step 103, and a second connection hole 402 is provided on the light-emitting surface lower plate 400, corresponding to the first connection hole 104. It is readily understood that the provision of the first connection hole 104 and the second connection hole 402 allows a worker to securely connect the light-emitting surface lower plate 400 to the base plate 100 using fasteners such as screws.
[0044] Please refer to Figure 2 In one possible embodiment, the cover plate 500 is provided with a third connection hole 501, and the light-emitting surface upper plate 300 is provided with a fourth connection hole 302 corresponding to the third connection hole 501. It is easy to understand that the provision of the third connection hole 501 and the fourth connection hole 302 allows a worker to securely connect the light-emitting surface upper plate 300 and the cover plate 500 using fasteners such as screws. Furthermore, the base plate 100 and the cover plate 500 are also securely connected using fasteners.
[0045] Please refer to Figure 2 In one possible embodiment, a power cord 201 is further included, and the power cord 201 is connected to the main light board 200. It is easy to understand that the power cord 201 is used to connect to an external power source to power the main light board 200 and the auxiliary light board 700. Moreover, since there are two main light boards 200, there are also two power cords 201, which are respectively provided on opposite sides of the bottom plate 100.
[0046] Please refer to Figure 4 In one possible embodiment, a wire trough 105 is provided on the base plate 100. The wire trough 105 is connected to the receiving groove 101 and is used to pass the power cord 201. It is easy to understand that the wire trough 105 also serves to position and limit the power cord 201. When installing the main light board 200, the power supply must be aligned with the position of the wire trough 105. The wire trough 105 also prevents the power cord 201 from shifting.
[0047] A visual inspection device includes a slit light source and a CCD camera, wherein the CCD camera is disposed directly above the hollow area of the slit light source. It should be noted that the slit light source is used in the visual inspection device. When the visual inspection device inspects a part of a product, the part is caused to extend from below into the illuminated surface formed by the slit light source (the part protrudes from the product surface). The CCD camera is disposed directly above the product to capture the image. Since only the part is illuminated, when the surface of the product is black, the captured image appears as several light spots in the black screen. The number of light spots corresponds to the number of parts, and the arrangement of the light spots corresponds to the arrangement of the parts, making it easy to see at a glance.
[0048] For example, for the PIN pins used in electronic components, the user places the product under a light source and extends the PIN pin into the light surface so that only the PIN pin is illuminated. When the surface of the product is black, the captured image is displayed as several light spots in the black picture. The number of light spots is the number of PIN pins, and the arrangement position of the light spots is the arrangement position of the PIN pins. This makes the number and position of the PIN pins in the electronic components clearly visible, greatly facilitating the detection of the PIN pins.
[0049] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.
Claims
1. A slit light source, characterized in that: Including bottom plate, main light plate, upper light-emitting surface plate, lower light-emitting surface plate and cover plate; The bottom plate is a hollow structure, and a receiving groove is provided on the inner side of the bottom plate. The bottom of the receiving groove is provided with a first step and a second step, and the first step is higher than the second step; The main light panel is arranged on the first step, and the light-emitting side of the main light panel faces the center of the bottom plate; The light-emitting surface lower plate is arranged on the second step; The cover plate is a hollow structure, and the cover plate is arranged on the top of the bottom plate; The upper light-emitting surface plate is arranged at the lower end of the cover plate, the upper light-emitting surface plate is located in the accommodating groove, and the upper light-emitting surface plate is located directly above the lower light-emitting surface plate, and a light-emitting gap is formed between the upper light-emitting surface plate and the lower light-emitting surface plate.
2. The slit light source according to claim 1, wherein: There are two main light panels, and the two main light panels are arranged opposite to each other.
3. The slit light source according to claim 1, wherein: It also includes a secondary light panel, which is electrically connected to the main light panel and is arranged at a corner of the bottom panel.
4. The slit light source according to claim 3, wherein: The number of the auxiliary light panels is four, and the four auxiliary light panels are respectively arranged at the four corners of the bottom plate.
5. The slit light source according to claim 3, wherein: Both ends of the upper light-emitting surface plate are provided with a first extension portion, and both ends of the lower light-emitting surface plate are provided with a second extension portion, and the first extension portion and the second extension portion form a light-emitting gap corresponding to the auxiliary light panel.
6. The slit light source according to claim 1, wherein: A first connection hole is provided on the second step, and a second connection hole corresponding to the first connection hole is provided on the lower plate of the light-emitting surface.
7. The slit light source according to claim 1, wherein: The cover plate is provided with a third connection hole, and the light-emitting surface upper plate is provided with a fourth connection hole corresponding to the third connection hole.
8. The slit light source according to claim 1, wherein: It also includes a power line, which is connected to the main light board.
9. The slit light source according to claim 8, wherein: A wire groove is provided on the bottom plate, the wire groove is communicated with the accommodating groove, and the wire groove is used for the power line to pass through.
10. A visual inspection device, characterized in that: The slit light source according to any one of claims 1 to 9 further comprises a CCD camera, wherein the CCD camera is arranged directly above the hollow area of the slit light source.