Laser marking assembly and laser marking system
By using a rectangular structure with an inclined setting for the supplementary light module in the laser marking assembly, the problems of image recognition errors and laser deviation in the existing technology are solved, and more efficient laser marking testing is achieved.
Patent Information
- Application Number
- CN202422524880.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-10-18
AI Technical Summary
Existing laser marking components use a circular surround lighting module, which leads to image recognition errors and laser deflection, affecting testing and production efficiency.
The system employs a first supplementary lighting module and a second supplementary lighting module, both with rectangular light-emitting surfaces. These modules are positioned on either side of the camera positioning module and tilted towards each other, causing partial overlap of light rays to form a convergence point for supplementary lighting.
It improves the accuracy of image recognition and the precision of laser position recognition, shortens the recognition time for each product from 3-5 seconds to 1-2 seconds, and significantly improves testing and production efficiency.
Smart Images
Figure CN223544363U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of laser marking technology, and in particular to a laser marking component and a laser marking system. Background Technology
[0002] Laser marking components are also commonly known as laser marking machines, laser coding machines, laser marking machines, laser engraving machines, and laser marking equipment. Laser marking uses a laser beam to evaporate the surface material to expose the deeper material, or to cause chemical and physical changes in the surface material to create a mark, or to burn away part of the material with light energy to reveal the desired etched graphics or text.
[0003] Existing laser marking components use a vision positioning module to capture the feature shape points of the product under test. The field of view image of the working area is used as the input signal. The position and pose features of the product under test are calculated through image processing and recognition algorithms to accurately locate the position of the workpiece and then perform laser marking on the workpiece. Therefore, when capturing the feature shape points of the product under test, it is necessary to use a supplementary lighting module to enhance the brightness and clarity of the captured image of the product under test.
[0004] The existing circular surround-type supplementary lighting module is relatively large, and the reflective surface material of the product can cause significant interference with image recognition features, easily leading to image recognition errors and laser misalignment. Utility Model Content
[0005] The purpose of this application is to provide a laser marking component and laser marking system that provides clear image recognition and improves testing and production efficiency.
[0006] This application discloses a laser marking assembly for laser marking a product under test. The assembly includes a placement stage, a camera positioning module, and a supplementary lighting module. The product under test is placed on the placement stage. Both the camera positioning module and the supplementary lighting module are positioned above the product under test. The supplementary lighting module includes a first supplementary lighting module and a second supplementary lighting module. The light-emitting surfaces of both the first and second supplementary lighting modules are rectangular structures. The first and second supplementary lighting modules are respectively positioned on both sides of the camera positioning module and are arranged opposite to each other. The first and second supplementary lighting modules are inclined towards each other, and the light emitted by the first and second supplementary lighting modules at least partially overlaps.
[0007] Optionally, both the first supplementary lighting module and the second supplementary lighting module have a cuboid structure; the angle between the mounting surface of the first supplementary lighting module and the horizontal plane is 15°-25°, and the angle between the mounting surface of the second supplementary lighting module and the horizontal plane is also 15°-25°.
[0008] Optionally, the light emitted by the first supplementary light module forms a first light irradiation surface near the second supplementary light module, and the light emitted by the second supplementary light module forms a second light irradiation surface near the first supplementary light module. The angle between the first light irradiation surface and the second light irradiation surface is 20°-40°. The distance between the first supplementary light module and the second supplementary light module is 7 cm-9 cm.
[0009] Optionally, both the first supplementary lighting module and the second supplementary lighting module include a housing, a PCB substrate, and a plurality of LED beads. The PCB substrate is disposed inside the housing, and the plurality of LED beads are arranged in a matrix on the PCB substrate.
[0010] Optionally, the first and second supplementary lighting modules further include a heat-conducting component and a diffuser plate. The housing includes a base plate, a first side plate, a second side plate, a third side plate, and a fourth side plate. The first side plate and the second side plate are opposite to each other, and the third side plate and the fourth side plate are opposite to each other. The first side plate, the second side plate, the third side plate, and the fourth side plate are respectively fixed perpendicularly to the base plate. The base plate, the first side plate, the second side plate, the third side plate, and the fourth side plate cooperate to form a rectangular housing with an opening and a hollow center. The heat-conducting component is disposed on the side of the base plate facing the opening. The PCB substrate is disposed on the side of the heat-conducting component away from the base plate. A plurality of LED beads are disposed on the side of the PCB away from the heat-conducting component. The diffuser plate is disposed at the opening by a fixing structure. The diffuser plate is made of a semi-transparent material and is used to uniformly emit light from the LED beads.
[0011] Optionally, the fixing structure includes a first limiting side, a second limiting side, a third limiting side, and a fourth limiting side. The first limiting side is disposed on the side of the first side plate away from the bottom plate. The second limiting side is disposed on the side of the second side plate away from the bottom plate. The third limiting side is disposed on the side of the first limiting side away from the first side plate and is oriented towards the second limiting side. The fourth limiting side is disposed on the side of the second limiting side away from the second side plate and is oriented towards the first side. The first limiting side, the second limiting side, the third limiting side, and the fourth limiting side cooperate to form a limiting groove, and the diffuser plate is disposed within the limiting groove.
[0012] Optionally, the lengths of the first and second side plates are both 18 cm to 22 cm, and the lengths of the third and fourth side plates are both 3 cm to 6 cm.
[0013] Optionally, the product under test has a cuboid structure, and the camera positioning module uses a CCD camera or a CMOS camera.
[0014] Optionally, the supplementary lighting module further includes a third supplementary lighting module and a fourth supplementary lighting module. The first supplementary lighting module, the second supplementary lighting module, the third supplementary lighting module and the fourth supplementary lighting module are arranged on the same horizontal plane and between the camera positioning module and the product under test. The first supplementary lighting module and the second supplementary lighting module are arranged opposite to each other, and the third supplementary lighting module and the fourth supplementary lighting module are arranged opposite to each other.
[0015] This application also discloses a laser marking system, including a display component and a laser marking component as described above. The display component is disposed on one side of the laser marking component and is signal-connected to the laser marking component.
[0016] Compared to existing technologies that use circular surround lighting modules, which are prone to image recognition errors and laser misalignment, the lighting module of this application includes a first lighting module and a second lighting module. Both the first and second lighting modules have rectangular light-emitting surfaces. The first and second lighting modules are respectively positioned on either side of the camera positioning module and are arranged opposite each other. The first and second lighting modules are tilted towards each other, and the light emitted by the first and second lighting modules at least partially overlaps. This allows both modules to simultaneously illuminate inwards, creating a convergence point of light on the product under test. Simultaneously, the rectangular light-emitting surfaces ensure that the light source illuminates the product horizontally, better highlighting its shape and posture. This avoids the instability or unclear features caused by scattered reflections and shadows on the product surface when the ring light source is positioned vertically above it, thus ensuring accurate laser positioning and improving testing efficiency. Attached Figure Description
[0017] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:
[0018] Figure 1 This is a schematic diagram of the image display of the product under test using a circular surround-type supplementary lighting module in existing technology;
[0019] Figure 2 This is a side view of the installation structure of the supplementary lighting module according to an embodiment of this application;
[0020] Figure 3 This is a schematic diagram of the image display of the product under supplemental lighting in an embodiment of this application;
[0021] Figure 4 This is a schematic diagram of the overall structure of the supplementary lighting module according to an embodiment of this application;
[0022] Figure 5 This is a cross-sectional structural diagram of the supplementary lighting module according to an embodiment of this application;
[0023] Figure 6 This is a top view schematic diagram of the installation structure of the supplementary lighting module according to an embodiment of this application;
[0024] Figure 7 This is a block diagram of the laser marking component according to an embodiment of this application.
[0025] The components are as follows: 10. Laser marking system; 100. Laser marking component; 110. Placement stage; 120. Camera positioning module; 130. Supplemental lighting module; 131. First supplemental lighting module; 132. Second supplemental lighting module; 133. Housing; 134. PCB substrate; 135. LED beads; 136. Heat-conducting component; 137. Diffuser plate; 138. Base plate; 139. First side plate; 140. Second side plate; 141. Third side plate. ; 142. Fourth side plate; 150. Fixing structure; 151. First limiting side; 152. Second limiting side; 153. Third limiting side; 154. Fourth limiting side; 155. Mounting surface; 160. Third supplementary lighting module; 170. Fourth supplementary lighting module; 180. Light beam; 181. First light beam illumination surface; 182. Second light beam illumination surface; 200. Product under test; 300. Power cord; 400. Display component. Detailed Implementation
[0026] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.
[0027] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of indicated technical features. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean a non-exclusive inclusion, which may include or add one or more other features, integers, steps, operations, units, components, and / or combinations thereof. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0028] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.
[0029] Example:
[0030] Figure 2 This is a side view of the installation structure of the supplementary lighting module according to an embodiment of this application. Figure 3 This is a schematic diagram of the image display of the product under supplemental lighting conditions according to an embodiment of this application, such as... Figure 2 As shown, this application discloses a laser marking assembly 100 for laser marking a product 200 to be tested. The assembly includes a placement stage 110, a camera positioning module 120, and a supplementary lighting module 130. The product 200 to be tested is placed on the placement stage 110. The camera positioning module 120 and the supplementary lighting module 130 are both positioned above the product 200. The supplementary lighting module 130 includes a first supplementary lighting module 131 and a second supplementary lighting module 132. The light-emitting surfaces of both the first supplementary lighting module 131 and the second supplementary lighting module 132 are rectangular. The first supplementary lighting module 131 and the second supplementary lighting module 132 are respectively positioned on both sides of the camera positioning module 120 and are arranged opposite to each other. The first supplementary lighting module 131 and the second supplementary lighting module 132 are inclined towards each other, and the light rays 180 emitted by the first supplementary lighting module 131 and the second supplementary lighting module 132 at least partially overlap.
[0031] Compared to existing technologies that use a circular, surrounding illumination module to vertically illuminate the product under test 200, this method addresses the challenge of using a laser to illuminate the product under test 200. Since the product under test 200 is typically a PCB substrate material (e.g., mark points, gold fingers, etc.), and is made of copper, the illumination module 130 usually uses red light. Figure 1As shown, when the circular surround lighting module 130 illuminates the product under test 200 perpendicularly, a diffused reflection shadow will appear on the upper surface of the product under test 200. Therefore, blue dots will form on the image captured by the camera positioning module 120. This makes the feature shape that the software can use as the positioning point unstable when recognizing the product's features, which can easily lead to image recognition errors and laser misalignment. The lighting module 130 of this application includes a first lighting module 131 and a second lighting module 132. The light-emitting surfaces of the first lighting module 131 and the second lighting module 132 are both rectangular structures. The first lighting module 131 and the second lighting module 132 are respectively arranged on both sides of the camera positioning module 120 and are arranged opposite to each other. The first lighting module 131 and the second lighting module 132 are inclined in the direction towards each other, and the light 180 emitted by the first lighting module 131 and the light 180 emitted by the second lighting module 132 at least partially overlap. Figure 3 As shown, the two supplementary lighting modules 130 can simultaneously illuminate inwards, forming a convergence point of light on the product under test 200. At the same time, the rectangular light-emitting surface allows the light source to illuminate the product under test 200 horizontally, further highlighting the characteristic shape and posture of the product under test 200. This avoids the problem of unstable or unclear features caused by the ring light source structure illuminating the product vertically above it, resulting in scattered light reflection and shadows on the product's surface. This ensures accurate laser position identification and improves testing and production efficiency.
[0032] The first supplementary lighting module 131 and the second supplementary lighting module 132 are both cuboid structures, and the product under test 200 also has a cuboid shape, matching the shapes of the first supplementary lighting module 131 and the second supplementary lighting module 132. This results in good supplementary lighting effect, and the light beam 180 can comprehensively cover the product under test 200. The camera positioning module 120 uses a CCD or CMOS camera, which can form high-quality images in low-light environments and has a fast data reading speed. Combined with the supplementary lighting module 130, this makes laser marking more accurate and efficient. The first and second supplementary lighting modules can be connected to an external power source via a power cable 300. Of course, the first supplementary lighting module 131 and the second supplementary lighting module 132 can also be in a battery storage mode, powered by an internal storage battery. The specific design depends on actual needs and is not limited here.
[0033] Specifically, such as Figure 2As shown, the angle a1 between the mounting surface 155 of the first supplementary lighting module 131 and the horizontal plane is 15°-25°, and the angle a2 between the mounting surface 155 of the second supplementary lighting module 132 and the horizontal plane is also 15°-25°. The light 180 emitted by the first supplementary lighting module 131 forms a first light irradiation surface 181 near the second supplementary lighting module 132, and the light 180 emitted by the second supplementary lighting module 132 forms a second light irradiation surface 182 near the first supplementary lighting module 131. The angle a3 between the first light irradiation surface 181 and the second light irradiation surface 182 is 20°-40°. The distance h between the light module 131 and the second supplementary light module 132 is 7 cm-9 cm. Through long-term testing and verification, the inventors found that after installing the first supplementary light module 131 and the second supplementary light module 132 at the above installation tilt angle, when the first supplementary light module 131 and the second supplementary light module 132 are turned on to provide supplementary light, the two beams of light 180 can form a good convergence area, and the product under test 200 is located in the convergence area. The projected area of the convergence area on the placement platform 110 is larger than the area of the orthographic projection of the product under test 200 on the placement platform 110, which effectively highlights the characteristic shape and posture of the product under test 200.
[0034] With the first supplementary lighting module 131 and the second supplementary lighting module 132 working together to supplement the light, the laser marking component can stably identify the smallest feature size of 0.5mm to 1mm. The camera positioning module 120 can be set to a recognition accuracy parameter between 5 and 7. The recognition is stable and the efficiency is improved. Compared with the existing technology where the recognition accuracy parameter is set between 3 and 4, the recognition time for each product is shortened from 3s to 5s to only 1s to 2s, which greatly improves the recognition efficiency.
[0035] Preferably, the angles of a1 and a2 are both 25°. In this case, the angle between the first supplementary light module 131 and the second supplementary light module 132 is 35°, and the supplementary light effect is best when the distance between the first supplementary light module 131 and the second supplementary light module 132 is 7 cm.
[0036] Figure 4 This is a schematic diagram of the overall structure of the supplementary lighting module according to an embodiment of this application. Figure 5 This is a cross-sectional structural diagram of the supplementary lighting module according to an embodiment of this application, combined with... Figures 4-5Both the first supplementary lighting module 131 and the second supplementary lighting module 132 include a housing 133, a PCB substrate 134, multiple LED beads 135, a heat-conducting component 136, and a diffuser plate 137. The housing 133 includes a base plate 138, a first side plate 139, a second side plate 140, a third side plate 141, and a fourth side plate 142. The first side plate 139 and the second side plate 140 are opposite to each other, and the third side plate 141 and the fourth side plate 142 are opposite to each other. The first side plate 139, the second side plate 140, the third side plate 141, and the fourth side plate 142 are respectively... The base plate 138, the first side plate 139, the second side plate 140, the third side plate 141 and the fourth side plate 142 are fixed vertically to the base plate 138. They cooperate to form a rectangular shell with an opening and a hollow center. The PCB substrate 134 is disposed on the side of the base plate 138 facing the opening. A plurality of LED beads 135 are disposed on the side of the PCB away from the base plate 138. The heat-conducting component 136 is disposed between the LED beads 135 and the PCB substrate 134. The diffuser plate 137 is disposed at the opening by a fixing structure 150.
[0037] The outer shell 133 is made of aluminum alloy, and the diffuser plate 137 is made of semi-transparent material to evenly distribute the light 180 emitted by the LED beads 135. This provides supplementary lighting for the product under test 200 while avoiding excessively bright emitted light that could cause reflections on the product under test 200. Furthermore, the lengths of the first side plate 139 and the second side plate 140 are both 18-22 cm, and the lengths of the third side plate 141 and the fourth side plate 142 are both 4-6 cm. The multiple LED beads 135 are arranged in six columns, forming a rectangular supplementary lighting module 130 that better matches the product under test 200.
[0038] Combination Figures 4-5The fixing structure 150 includes a first limiting side 151, a second limiting side 152, a third limiting side 153, and a fourth limiting side 154. The first limiting side 151 is located on the side of the first side plate 139 away from the bottom plate 138. The second limiting side 152 is located on the side of the second side plate 140 away from the bottom plate 138. The third limiting side 153 is located on the side of the first limiting side 151 away from the first side plate 139 and faces the second side plate 140. The fourth limiting side 154 is located on the side of the second limiting side 152 away from the second side plate 140 and facing the first side. The first limiting side 151, the second limiting side 152, the third limiting side 153, and the fourth limiting side 154 cooperate to form a limiting groove. The diffuser plate 137 is disposed in the limiting groove and is fixed by abutment with the third limiting side 153 and the fourth limiting side 154. In this way, the diffuser plate 137 can be installed by a pull-in method, which is convenient for installation and prevents it from falling off. Of course, after the diffuser plate 137 is installed into the limiting groove, it can also be fixed to the third side plate 141 and the fourth side plate 142 on both sides with screws to enhance the installation and fixing effect.
[0039] Of course, it can also be equipped with four supplementary lighting modules (130). Figure 6 This is a top view schematic diagram of the installation structure of the supplementary lighting module according to an embodiment of this application, as shown below. Figure 6 As shown, the supplementary lighting module 130 also includes a third supplementary lighting module 160 and a fourth supplementary lighting module 170. The first supplementary lighting module 131, the second supplementary lighting module 132, the third supplementary lighting module 160, and the fourth supplementary lighting module 170 are arranged on the same horizontal plane and between the camera positioning module 120 and the product under test 200. The first supplementary lighting module 131 and the second supplementary lighting module 132 are arranged opposite each other, and the third supplementary lighting module 160 and the fourth supplementary lighting module 170 are arranged opposite each other. At this time, the four supplementary lighting modules 130 provide supplementary lighting to the product under test 200 from four directions, making the supplementary lighting more uniform. At this time, the supplementary lighting brightness can be adjusted to avoid the phenomenon that the product under test 200 reflects shadows due to excessive supplementary lighting brightness.
[0040] Figure 7 This is a block diagram of the laser marking component according to an embodiment of this application, as shown below. Figure 7As shown, this application also discloses a laser marking system 10, including a laser marking component 100 and a display component 400 as described above. The laser marking component 100 is signal-connected to the display component 400. Through a transmission module (not shown), the camera positioning module 120 transmits the image of the product to be tested 200 captured by the system to the display component 400 for display. Based on the displayed image, the operator can easily perform laser marking on the product to be tested 200, resulting in higher accuracy and more convenient and faster operation.
[0041] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.
[0042] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.
Claims
1. A laser marking assembly for laser marking a product under test, comprising a placement stage, a camera positioning module, and a supplementary lighting module, wherein the product under test is placed on the placement stage, and the camera positioning module and the supplementary lighting module are both disposed above the product under test, characterized in that, The supplementary lighting module includes a first supplementary lighting module and a second supplementary lighting module. The light-emitting surfaces of both the first supplementary lighting module and the second supplementary lighting module are rectangular structures. The first supplementary lighting module and the second supplementary lighting module are respectively disposed on both sides of the camera positioning module and are disposed opposite to each other. The first supplementary lighting module and the second supplementary lighting module are inclined towards each other, and the light emitted by the first supplementary lighting module and the light emitted by the second supplementary lighting module overlap at least partially.
2. The laser marking assembly according to claim 1, characterized in that, Both the first supplementary lighting module and the second supplementary lighting module have a cuboid structure; the angle between the mounting surface of the first supplementary lighting module and the horizontal plane is 15°-25°, and the angle between the mounting surface of the second supplementary lighting module and the horizontal plane is also 15°-25°.
3. The laser marking assembly according to claim 1, characterized in that, The light emitted by the first supplementary light module forms a first light irradiation surface near the second supplementary light module, and the light emitted by the second supplementary light module forms a second light irradiation surface near the first supplementary light module. The angle between the first light irradiation surface and the second light irradiation surface is 20°-40°. The distance between the first supplementary light module and the second supplementary light module is 7 cm-9 cm.
4. The laser marking assembly according to claim 1, characterized in that, Both the first supplementary lighting module and the second supplementary lighting module include a housing, a PCB substrate, and a plurality of LED beads. The PCB substrate is disposed inside the housing, and the plurality of LED beads are arranged in a matrix on the PCB substrate.
5. The laser marking assembly according to claim 4, characterized in that, The first and second supplementary lighting modules further include a heat-conducting component and a diffuser plate. The outer shell includes a base plate, a first side plate, a second side plate, a third side plate, and a fourth side plate. The first side plate and the second side plate are arranged opposite to each other, and the third side plate and the fourth side plate are arranged opposite to each other. The first side plate, the second side plate, the third side plate, and the fourth side plate are respectively fixed perpendicularly to the base plate. The base plate, the first side plate, the second side plate, the third side plate, and the fourth side plate cooperate to form a rectangular shell with an opening and a hollow center. The PCB substrate is disposed on the side of the base plate facing the opening. A plurality of LED beads are disposed on the side of the PCB away from the base plate. The heat-conducting component is disposed between the LED beads and the PCB substrate. The diffuser plate is disposed at the opening by a fixing structure. The diffuser plate is made of a semi-transparent material and is used to even out the light emitted by the LED beads.
6. The laser marking assembly according to claim 5, characterized in that, The fixing structure includes a first limiting side, a second limiting side, a third limiting side, and a fourth limiting side. The first limiting side is located on the side of the first side plate away from the bottom plate. The second limiting side is located on the side of the second side plate away from the bottom plate. The third limiting side is located on the side of the first limiting side away from the first side plate and is oriented towards the second limiting side. The fourth limiting side is located on the side of the second limiting side away from the second side plate and is oriented towards the first limiting side. The first, second, third, and fourth limiting sides cooperate to form a limiting groove. The diffuser plate is disposed in the limiting groove and abuts and is fixed to the third and fourth limiting sides, respectively.
7. The laser marking assembly according to claim 5, characterized in that, The lengths of the first and second side plates are both 18 cm to 22 cm, and the lengths of the third and fourth side plates are both 3 cm to 6 cm.
8. The laser marking assembly according to claim 1, characterized in that, The product under test has a cuboid structure, and the camera positioning module uses a CCD camera or a CMOS camera.
9. The laser marking assembly according to claim 1, characterized in that, The supplementary lighting module further includes a third supplementary lighting module and a fourth supplementary lighting module. The first supplementary lighting module, the second supplementary lighting module, the third supplementary lighting module and the fourth supplementary lighting module are arranged on the same horizontal plane and are arranged between the camera positioning module and the product under test. The first supplementary lighting module and the second supplementary lighting module are arranged opposite to each other, and the third supplementary lighting module and the fourth supplementary lighting module are arranged opposite to each other.
10. A laser marking system, characterized in that, The device includes a display component and a laser marking component as described in any one of claims 1-9, wherein the display component is disposed on one side of the laser marking component and is signal-connected to the laser marking component.