Optical module PCB bar code detection machine
Patent Information
- Application Number
- CN202522359390.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-06
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-06
AI Technical Summary
然而，受丝印精度、镭射参数偏差等因素影响，制作完成的条码易出现图案模糊、残缺、对比度不足等问题，若未及时检测，会导致后续扫码环节出现无法识别、信息读取错误等异常，进而造成后续生产环节停滞，因此需对PCB表面的条码进行检测，待检测完成后，合格的PCB方可流转至下一工序
需要对PCB上的条码进行检测时，操作人员先将待检测的PCB放置在第一定位治具上完成定位，随后将载有PCB的第一定位治具放置在机架上的第一输送装置上，接着第一输送装置启动并由后往前输送第一定位治具，与此同时视觉检测装置同步移至第一检测工位的上方等待，待第一定位治具带着PCB移动至第一检测工位并到位后，视觉检测装置立即对该工位上PCB的条码进行视觉检测；完成对第一检测工位处PCB的条码检测后，第一输送装置重新启动并向前输送第一定位治具，使得第一定位治具和完成检测的PCB进入下游的分拣机中，以便后续根据检测结果进行分类处理。在第一输送装置朝第一检测工位输送第一定位治具的过程中，操作人员可同步进行下一块PCB的上料操作，操作人员将另一块待检测PCB放置在第二定位治具上完成定位，再将载有该PCB的第二定位治具放置在机架上的第二输送装置上，随后第二输送装置启动并由后往前输送第二定位治具，使得第二定位治具和PCB一同送至第二检测工位；待视觉检测装置完成第一检测工位处PCB的条码检测后，立即移至第二检测工位的上方，并对第二定位治具上PCB的条码进行视觉检测，检测完成后第二输送装置将第二定位治具和完成检测的PCB向前输送至下游的分拣机，此时操作人员可同步将新的待检测PCB放置在空的第一定位治具上，并重新放置到第一输送装置上启动新一轮输送检测，实现循环连续的PCB条码检测作业。该光模块PCB条码检测机通过操作人员同步上料、第一输送装置和第二输送装置分别输送、视觉检测装置移动切换工位的配合，避免了单工位检测时的上下料等待间隙，大幅提升了单位时间内的PCB检测量；另一方面，第一定位治具和第二定位治具能精准固定PCB位置，使得视觉检测装置能以固定角度对第一定位治具和第二定位治具上的PCB进行条码检测，省去了人工反复调整扫码角度的步骤，避免了传统检测中因人工手持扫码枪角度偏差、PCB 位置晃动或操作人员疲劳导致的检测偏差，确保视觉检测装置每次采集的条码图像位置稳定，进而有利于提高PCB的条码检测效率。
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Figure CN224839977U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of PCB technology, and in particular to a barcode inspection machine for optical module PCBs. Background Technology
[0002] Printed Circuit Boards (PCBs), as the core carriers of electronic devices, are key components for achieving electrical connections between electronic components and are widely used in communications, consumer electronics, and industrial control. Optical module PCBs are specifically designed for optical modules and are crucial for photoelectric conversion and data transmission. During the production of optical module PCBs, after the solder mask process, barcodes, such as QR codes or barcodes, are typically created on the PCB surface using silkscreen or laser engraving. These barcodes carry key information such as the PCB model, production batch, and traceability code for subsequent production verification, product traceability, and quality control. However, due to factors such as silkscreen accuracy and laser parameter deviations, the finished barcodes are prone to problems such as blurry patterns, incomplete designs, and insufficient contrast. If not detected in time, this can lead to unrecognizable codes and incorrect information readings in subsequent scanning stages, causing production halts. Therefore, it is necessary to inspect the barcodes on the PCB surface. Only PCBs that pass inspection can proceed to the next process. In existing technologies, PCB barcode inspection is mostly carried out by scanning each barcode one by one with a barcode scanner. That is, the operator holds the barcode scanner and scans the barcode on each PCB one by one to verify it. During the inspection process, in order to ensure successful scanning, the operator needs to repeatedly adjust the angle between the barcode scanner and the PCB barcode to avoid scanning failure due to angle deviation. This angle adjustment process requires additional inspection time for each PCB, and this adjustment action needs to be repeated for each PCB to be inspected. This directly limits the number of PCBs that can be inspected per unit time, thus hindering the improvement of PCB barcode inspection efficiency. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a PCB barcode inspection machine for optical modules, which is beneficial to improving the barcode inspection efficiency of PCBs.
[0004] The optical module PCB barcode inspection machine according to an embodiment of the present invention includes a frame, a first positioning fixture, a second positioning fixture, a first conveying device, a second conveying device, and a vision inspection device. The frame has a first inspection station and a second inspection station; the first positioning fixture is used to position the PCB; the second positioning fixture is used to position the PCB; the first conveying device is disposed on the frame and is used to convey the first positioning fixture from back to front, so that the first positioning fixture and the PCB on it can move to the first inspection station; the second conveying device is disposed on the frame and is used to convey the second positioning fixture from back to front, so that the second positioning fixture and the PCB on it can move to the second inspection station; the vision inspection device is slidably connected to the frame and can move above the first inspection station to perform visual inspection of the barcode on the PCB on the first positioning fixture at the first inspection station, and can also move above the second inspection station to perform visual inspection of the barcode on the PCB on the second positioning fixture at the second inspection station.
[0005] It has at least the following beneficial effects: When barcodes on a PCB need to be inspected, the operator first places the PCB to be inspected on the first positioning fixture for positioning. Then, the first positioning fixture carrying the PCB is placed on the first conveyor on the frame. The first conveyor then starts and transports the first positioning fixture from back to front. At the same time, the vision inspection device moves to the top of the first inspection station and waits. After the first positioning fixture, carrying the PCB, moves to the first inspection station and is in place, the vision inspection device immediately performs visual inspection on the barcode of the PCB at that station. After the barcode inspection of the PCB at the first inspection station is completed, the first conveyor restarts and transports the first positioning fixture forward, so that the first positioning fixture and the inspected PCB enter the downstream sorting machine for subsequent classification based on the inspection results. While the first conveyor is transporting the first positioning fixture to the first inspection station, the operator can simultaneously load the next PCB. The operator places another PCB to be inspected on the second positioning fixture for positioning, and then places the second positioning fixture carrying the PCB on the second conveyor on the frame. Subsequently, the second conveyor starts and transports the second positioning fixture from back to front, so that the second positioning fixture and the PCB are sent to the second inspection station together. After the vision inspection device completes the barcode inspection of the PCB at the first inspection station, it immediately moves to the top of the second inspection station and performs visual inspection on the barcode of the PCB on the second positioning fixture. After the inspection is completed, the second conveyor transports the second positioning fixture and the inspected PCB forward to the downstream sorting machine. At this time, the operator can simultaneously place the new PCB to be inspected on the empty first positioning fixture and put it back on the first conveyor to start a new round of conveying and inspection, realizing a continuous PCB barcode inspection operation. This optical module PCB barcode inspection machine, through the coordinated operation of simultaneous loading by operators, separate conveying by the first and second conveying devices, and the movement and switching of the vision inspection device at different workstations, avoids the waiting gaps during loading and unloading in single-station inspection, significantly increasing the PCB inspection volume per unit time. On the other hand, the first and second positioning fixtures can accurately fix the PCB position, allowing the vision inspection device to perform barcode inspection on the PCB on the first and second positioning fixtures at a fixed angle. This eliminates the step of manually adjusting the scanning angle repeatedly, avoiding the detection deviations caused by manual barcode scanner angle deviation, PCB position shaking, or operator fatigue in traditional inspection. It ensures that the position of the barcode image acquired by the vision inspection device is stable each time, thereby improving the barcode inspection efficiency of PCBs.
[0006] According to the optical module PCB barcode inspection machine of this utility model embodiment, the first conveying device includes two supports and two belts. The two supports are both mounted on the frame, and the two belts are rotatably connected to the two supports respectively. The two belts abut against the two sides of the first positioning fixture respectively, and the two belts can convey the first positioning fixture from back to front. The gap between the two supports is used for the first positioning fixture to move.
[0007] According to the optical module PCB barcode inspection machine of this utility model embodiment, each of the two supports is provided with a support block, and the two support blocks are respectively disposed in the two belts. The two support blocks are abutted against the two sides of the first positioning fixture through the belts.
[0008] According to an embodiment of the optical module PCB barcode inspection machine, one of the supports is slidably connected to the frame so that the distance between the two supports can be adjusted.
[0009] According to the optical module PCB barcode inspection machine of this utility model embodiment, the frame is provided with two slide rails, both of which are parallel to the left and right directions. Each of the supports is provided with a slider at both the front and rear ends, and the two sliders are respectively slidably connected to the two slide rails.
[0010] According to the optical module PCB barcode inspection machine of this utility model embodiment, one of the supports is provided with two slide rail limiters, and the two slide rail limiters can be clamped on the two slide rails respectively.
[0011] The optical module PCB barcode inspection machine according to an embodiment of the present utility model further includes a first limiting device, which is disposed on the frame and can abut against the first positioning fixture on the two belts so that the first positioning fixture stops at the first inspection station.
[0012] According to the optical module PCB barcode inspection machine of this utility model embodiment, the first limiting device includes a lifting cylinder and a limiting block. The cylinder body of the lifting cylinder is connected to the frame, and the piston rod of the lifting cylinder is connected to the limiting block. The lifting cylinder can drive the limiting block to rise so that the limiting block rises between the two belts and abuts against the first positioning fixture on the two belts.
[0013] The optical module PCB barcode inspection machine according to an embodiment of the present utility model further includes a linear drive device, which is disposed on the frame. The output end of the linear drive device is connected to the vision inspection device. The linear drive device is used to drive the vision inspection device to move in the left and right direction so that the vision inspection device can move above the first inspection station or the second inspection station.
[0014] According to an embodiment of the present invention, the optical module PCB barcode inspection machine includes a visual inspection device comprising a bracket, a camera, and an image inspection module. The bracket is connected to the output end of the linear drive device, and the camera is mounted on the bracket.
[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a structural schematic diagram of the optical module PCB barcode inspection machine according to an embodiment of this utility model; Figure 2 These are schematic diagrams of the first and second conveying devices. Figure 3 This is a schematic diagram of the structure of the first conveying device; Figure 4 yes Figure 3 A magnified view of a section at point A in the middle; Figure 5 yes Figure 3 A magnified view of a section at point B in the middle; Figure 6 This is a structural schematic diagram of a linear drive device and a vision inspection device; Icon labels: First conveying device 100; first positioning fixture 110; support 120; belt 130; support block 140; slide rail 150; slider 160; slide rail limiter 170; second conveying device 200; second positioning fixture 210; Visual inspection device 300; bracket 310; camera 320; Linear drive unit 400; First limit device 500; lifting cylinder 510; limit stop 520; Second limiting device 600; Frame 700; First inspection station 710; Second inspection station 720. Detailed Implementation
[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0018] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.
[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0020] refer to Figure 1 and Figure 2 This utility model discloses a PCB barcode inspection machine for optical modules, including a frame 700, a first positioning fixture 110, a second positioning fixture 210, a first conveying device 100, a second conveying device 200, and a vision inspection device 300. The frame 700 is provided with a first inspection station 710 and a second inspection station 720; the first positioning fixture 110 is used to position the PCB; the second positioning fixture 210 is used to position the PCB; the first conveying device 100 is disposed on the frame 700 and is used to convey the first positioning fixture 110 from back to front, so that the first positioning fixture 110 and the PCB on it can move to the first inspection station 710; the second conveying device 200 is disposed on the frame 700 and is used to convey the second positioning fixture 210 from back to front, so that the second positioning fixture 210 and the PCB on it can move to the first inspection station 710; the second conveying device 200 is disposed on the frame 700 and is used to convey the second positioning fixture 210 from back to front, so that the second positioning fixture 210 and the PCB on it can move to the first inspection station 710. The fixture 210 and the PCB thereon can be moved to the second inspection station 720; the vision inspection device 300 is slidably connected to the frame 700, and can be moved above the first inspection station 710 so that the vision inspection device 300 can perform visual inspection on the barcode of the PCB on the first positioning fixture 110 at the first inspection station 710, and can be moved above the second inspection station 720 so that the vision inspection device 300 can perform visual inspection on the barcode of the PCB on the second positioning fixture 210 at the second inspection station 720.
[0021] Understandably, when barcodes on a PCB need to be inspected, the operator first places the PCB to be inspected on the first positioning fixture 110 for positioning. Then, the first positioning fixture 110 carrying the PCB is placed on the first conveyor device 100 on the frame 700. The first conveyor device 100 then starts and conveys the first positioning fixture 110 from back to front. At the same time, the vision inspection device 300 moves to the top of the first inspection station 710 and waits. After the first positioning fixture 110, carrying the PCB, moves to the first inspection station 710 and is in place, the vision inspection device 300 immediately performs visual inspection on the barcode of the PCB at that station. After the barcode inspection of the PCB at the first inspection station 710 is completed, the first conveyor device 100 restarts and conveys the first positioning fixture 110 forward, so that the first positioning fixture 110 and the inspected PCB enter the downstream sorting machine for subsequent classification based on the inspection results. During the process of the first conveying device 100 conveying the first positioning fixture 110 towards the first inspection station 710, the operator can simultaneously perform the loading operation of the next PCB. The operator places another PCB to be inspected on the second positioning fixture 210 for positioning, and then places the second positioning fixture 210 carrying the PCB on the second conveying device 200 on the frame 700. Subsequently, the second conveying device 200 starts and conveys the second positioning fixture 210 from back to front, so that the second positioning fixture 210 and the PCB are sent together to the second inspection station 720 for visual inspection. After the testing device 300 completes the barcode detection of the PCB at the first testing station 710, it immediately moves to the top of the second testing station 720 and performs visual inspection on the barcode of the PCB on the second positioning fixture 210. After the inspection is completed, the second conveying device 200 conveys the second positioning fixture 210 and the PCB that has been inspected forward to the downstream sorting machine. At this time, the operator can simultaneously place the new PCB to be inspected on the empty first positioning fixture 110 and put it back on the first conveying device 100 to start a new round of conveying and inspection, so as to realize the cyclical continuous PCB barcode inspection operation. This optical module PCB barcode inspection machine, through the coordinated operation of simultaneous loading by operators, separate conveying by the first conveyor device 100 and the second conveyor device 200, and the movement and switching of the vision inspection device 300 between workstations, avoids the waiting gaps during loading and unloading in single-station inspection, significantly increasing the PCB inspection volume per unit time. On the other hand, the first positioning fixture 110 and the second positioning fixture 210 can accurately fix the PCB position, allowing the vision inspection device 300 to perform barcode inspection on the PCB on the first positioning fixture 110 and the second positioning fixture 210 at a fixed angle. This eliminates the step of repeatedly adjusting the scanning angle manually, avoiding the detection deviations caused by manual hand-held barcode scanner angle deviation, PCB position shaking, or operator fatigue in traditional inspection. This ensures that the position of the barcode image collected by the vision inspection device 300 is stable each time, thereby improving the barcode inspection efficiency of PCBs.
[0022] refer to Figures 2 to 4 The first conveying device 100 includes two supports 120 and two belts 130. The two supports 120 are mounted on a frame 700, and the two belts 130 are rotatably connected to the two supports 120 respectively. The two belts 130 abut against both sides of the first positioning fixture 110, and the two belts 130 can convey the first positioning fixture 110 from back to front. The gap between the two supports 120 is used to allow the first positioning fixture 110 to move. Understandably, when barcodes on a PCB need to be inspected, the operator places the first positioning fixture 110 carrying the PCB on the rear end of the two belts 130, so that both sides of the first positioning fixture 110 abut against the two belts 130 respectively; then the two belts 130 rotate, and the friction between the two belts 130 and the sides of the first positioning fixture 110 drives the first positioning fixture 110 forward. During the forward movement of the first positioning fixture 110, the two supports 120 abut against the sides of the first positioning fixture 110, thereby limiting the movement of the first positioning fixture 110 and preventing it from swaying in a direction perpendicular to the belt 130 during movement. In this invention, both belts 130 are parallel to the front-back direction. In this invention, the first conveying device 100 further includes a motor, two driving pulleys, and two driven pulleys. The motor is mounted on a frame 700. The two driving pulleys are rotatably connected to two supports 120, and the two driven pulleys are rotatably connected to two supports 120, respectively. One belt 130 is wound around the driving and driven pulleys on one of the supports 120, and the other belt 130 is wound around the driving and driven pulleys on the other support 120. The two driving pulleys are connected by a transmission shaft. The motor is driven by one of the driving pulleys and drives it to rotate, thereby causing the two belts 130 to rotate and move the first positioning fixture 110 forward. In this invention, the two belts 130 are respectively positioned on opposite sides of the two supports 120.
[0023] refer to Figure 4Each of the two supports 120 is equipped with a support block 140, which is located within the two belts 130. Both support blocks 140 abut against the sides of the first positioning fixture 110 via the belts 130. It is understood that when the first positioning fixture 110 is placed on the two belts 130, its weight is transferred to the support blocks 140, providing stable support and preventing the belts 130 from deforming due to the weight. This ensures the belts 130 remain flat, allowing the sides of the first positioning fixture 110 to maintain tight and even contact with the belts 130, preventing the first positioning fixture 110 from tilting laterally during transport due to belt deformation, thus achieving smooth movement of the first positioning fixture 110.
[0024] refer to Figure 3 One of the supports 120 is slidably connected to the frame 700, allowing the spacing between the two supports 120 to be adjusted. Understandably, in actual production, the dimensions of the PCBs to be inspected vary, and the width of the corresponding first positioning fixture 110 will also differ. By sliding one support 120 to adjust the spacing between the two supports 120, the spacing between the two belts 130 can be matched with the different widths of the first positioning fixture 110, ensuring that both sides of the first positioning fixture 110 are always in close contact with the belts 130, thus improving the versatility of the optical module PCB barcode inspection machine.
[0025] refer to Figure 3The frame 700 is provided with two slide rails 150, both of which are parallel to the left and right directions. Each of the support 120 has a slider 160 at both ends. The two sliders 160 are slidably connected to the two slide rails 150 respectively. Each support 120 is provided with two slide rail 150 limiters, which can clamp onto the two slide rails 150 respectively. Understandably, when adjusting the distance between the two supports 120, the operator first loosens the two slide rail 150 limiters on one of the supports 120, causing the two slide rail 150 limiters to release the two slide rails 150 respectively. Then, according to the width of the first positioning fixture 110 to be adapted, the operator pushes the slidable support 120, causing the slidable support 120 to slide on the two slide rails 150 via the two sliders 160 until the distance between the two supports 120 matches the width of the first positioning fixture 110. Finally, the two slide rail 150 limiters are tightened again, causing the two slide rail 150 limiters to clamp the corresponding slide rails 150 again. At this point, the support 120 can be locked and fixed in the current position to complete the adjustment of the distance between the two supports 120. In this invention, the slide rail 150 limiter is a common positioning and locking component used in conjunction with the slide rail 150. It is mainly used to fix the support 120 and the slider 160 in their current positions on the slide rail 150 after the support 120 has slid into place via the slider 160, preventing slippage during the testing process. The slide rail 150 limiter includes a handle and a contact part. When the distance between the two supports 120 needs to be adjusted, the operator loosens the handle to separate the contact part from the slide rail 150, allowing the supports 120 and slider 160 to move. After the distance between the two supports 120 is adjusted to the correct position, the operator tightens the handle, causing the contact part to tightly clamp the slide rail 150. The contact part restricts the movement of the slider 160 and the support 120 through friction or mechanical locking, ensuring a stable distance between the two supports 120.
[0026] refer to Figure 3 and Figure 5The optical module PCB barcode inspection machine also includes a first limiting device 500, which is mounted on the frame 700. The first limiting device 500 can abut against the first positioning fixture 110 on the two belts 130, so that the first positioning fixture 110 stops at the first inspection station 710. The first limiting device 500 includes a lifting cylinder 510 and a limiting block 520. The cylinder body of the lifting cylinder 510 is connected to the frame 700, and the piston rod of the lifting cylinder 510 is connected to the limiting block 520. The lifting cylinder 510 can drive the limiting block 520 to rise, so that the limiting block 520 rises between the two belts 130 and abuts against the first positioning fixture 110 on the two belts 130. Understandably, during the forward transport of the first positioning fixture 110 by the two belts 130, just before the first positioning fixture 110 reaches the first inspection station 710, the lifting cylinder 510 in the first limiting device 500 is activated. The piston rod of the lifting cylinder 510 drives the limiting block 520 to rise, causing the limiting block 520 to rise between the two belts 130 and be at a preset height. When the first positioning fixture 110 moves from back to front with the belts 130 to the vicinity of the first inspection station 710, the first positioning fixture 110... When the front end abuts against the limit stop 520, the two belts 130 immediately stop rotating. Under the limiting action of the limit stop 520, the first positioning fixture 110 precisely stops at the first inspection station 710. After the vision inspection device 300 completes the barcode inspection of the PCB on the first positioning fixture 110, the piston rod of the lifting cylinder 510 retracts and drives the limit stop 520 down to below the two belts 130. The two belts 130 restart and transport the inspected first positioning fixture 110 forward to the downstream sorting machine. The first limiting device 500 ensures that the first positioning fixture 110 can precisely stop at the first inspection station 710 by abutting, preventing the first positioning fixture 110 from exceeding the first inspection station 710 due to inertia or conveying error of the belts 130. This ensures that the vision inspection device 300 can always inspect the PCB barcode at the first inspection station 710 to improve inspection accuracy.
[0027] In this embodiment of the invention, the first inspection station 710 is located to the right of the second inspection station 720, and the first conveying device 100 is located to the right of the second conveying device 200. The structure and operating principle of the second conveying device 200 are the same as those of the first conveying device 100, and will not be described further here. The optical module PCB barcode inspection machine also includes a second limiting device 600, which can abut against the second positioning fixture 210 on the second conveying device 200 to stop the second positioning fixture 210 at the second inspection station 720. The structure and operating principle of the second limiting device 600 are the same as those of the first limiting device 500, and will not be described further here.
[0028] refer to Figure 1and Figure 6 The optical module PCB barcode inspection machine also includes a linear drive device 400, which is mounted on the frame 700. The output end of the linear drive device 400 is connected to the vision inspection device 300. The linear drive device 400 is used to drive the vision inspection device 300 to move in the left and right direction, so that the vision inspection device 300 can move above the first inspection station 710 or the second inspection station 720. In this embodiment of the invention, the linear drive device 400 can be a common screw and nut drive device. The vision inspection device 300 can be slidably connected to the frame 700 in the left and right direction through the connection of the slide rail 150 and the slider 160. The nut in the screw and nut drive device is connected to the vision inspection device 300, so that the screw and nut drive device can drive the vision inspection device 300 to move in the left and right direction.
[0029] refer to Figure 6 The visual inspection device 300 includes a support 310, a camera 320, and an image detection module. The support 310 is connected to the output end of the linear drive device 400, and the camera 320 is mounted on the support 310. In this invention, the camera 320, with the assistance of the first positioning fixture 110 and the second positioning fixture 210, accurately aligns with the barcode on the PCB surface. The camera 320 captures an image of the barcode on the PCB surface and transmits the image to the image detection module. The image detection module first performs noise reduction, contrast enhancement, and binarization preprocessing on the image to remove background interference and highlight the barcode boundaries. The image detection module then locates the barcode area using an algorithm, and subsequently analyzes the bar and space arrangement information based on the barcode encoding rules. Simultaneously, it checks the integrity and clarity of the barcode. Finally, based on the analysis results and quality inspection, it determines whether the barcode on the PCB is qualified, thus completing the inspection. The inspection result is then transmitted to the downstream sorting machine. The visual inspection device 300 is a common device in the field of visual recognition, which detects barcodes on PCBs through image recognition; further details are omitted here.
[0030] Understandably, the operator first places a PCB to be inspected in the first positioning fixture 110 for precise positioning, then places the first positioning fixture 110 carrying the PCB on the first conveying device 100; next, the first conveying device 100 starts, moving the first positioning fixture 110 towards the first inspection station 710, while the first limiting device 500 is activated to wait for the first positioning fixture 110 to arrive at its position; while the first conveying device 100 is moving the first positioning fixture 110, the operator places another PCB to be inspected in the second positioning fixture 210 for positioning, then places the second positioning fixture 210 carrying the PCB on the second conveying device 200, which then starts and moves the second positioning fixture 210 towards the second inspection station 720, while the second limiting device 600 is activated; when the first positioning fixture 110 is in position, the operator places another PCB to be inspected in the second positioning fixture 210 for precise positioning, then places the second positioning fixture 210 carrying the PCB on the second conveying device 200, which then starts and moves the second positioning fixture 210 towards the second inspection station 720, while the second limiting device 500 is activated; when the first positioning fixture 210 is in position, the operator places another PCB to be inspected in the second positioning fixture 210 for precise positioning, then places the second positioning fixture 210 carrying the PCB on the second conveying device 200, then starts and moves the second positioning fixture 210 towards the second inspection station 720, while the second limiting device 500 is activated; when the first positioning fixture 210 is in position, the operator places the first positioning fixture 210 on the second conveying device 200 to wait for the first positioning fixture 210 to arrive at its position. When the first positioning fixture 110 moves to the first inspection station 710, it is blocked by the first limiting device 500, and the first conveying device 100 stops running, so that the first positioning fixture 110 is precisely stopped at the first inspection station 710. At this time, the linear drive device 400 on the frame 700 starts and drives the bracket 310 to move, first moving the camera 320 on the bracket 310 to directly above the first inspection station 710; the camera 320 captures the PCB barcode image at the first inspection station 710 and transmits it to the image detection module for detection and analysis, and obtains the detection result; during the barcode detection of the PCB at the first inspection station 710, the second positioning fixture 210 moves to the second inspection station 720 and is blocked by the second limiting device 600, and the second conveying device 200 stops running, so that the second positioning fixture 210 is precisely stopped at the second inspection station 720. After the camera 320 and image detection module complete the barcode detection of the PCB at the first detection station 710, the linear drive device 400 drives the support 310 to move, causing the camera 320 on the support 310 to move directly above the second detection station 720. The camera 320 captures the PCB barcode image at the second detection station 720 and transmits it to the image detection module for detection analysis, and obtains the detection result. After the camera 320 and image detection module complete the barcode detection of the PCBs at the first detection station 710 and the second detection station 720, the first limiting device 500 resets, and the first conveying device 100 continues to move forward to send the first positioning fixture 110 and the PCB to the sorting machine. The second limiting device 600 resets, and the second conveying device 200 continues to move forward to send the second positioning fixture 210 and the PCB to the sorting machine. The sorting machine sorts the PCBs on the first positioning fixture 110 and the second positioning fixture 210 according to the detection result of the image detection module. By repeating the above process, the barcode detection of the PCBs can be completed continuously.
[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0032] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A PCB barcode inspection machine for optical modules, characterized in that, include: The frame (700) is equipped with a first inspection station (710) and a second inspection station (720); The first positioning fixture (110) is used to position the PCB; The second positioning fixture (210) is used to position the PCB; A first conveying device (100) is disposed on the frame (700). The first conveying device (100) is used to convey the first positioning fixture (110) from back to front, so that the first positioning fixture (110) and the PCB can be moved to the first inspection station (710). The second conveying device (200) is disposed on the frame (700). The second conveying device (200) is used to convey the second positioning fixture (210) from back to front so that the second positioning fixture (210) and the PCB can be moved to the second inspection station (720). A visual inspection device (300) is slidably connected to the frame (700). The visual inspection device (300) can move above the first inspection station (710) so that the visual inspection device (300) can visually inspect the barcode on the PCB on the first positioning fixture (110) at the first inspection station (710). The visual inspection device (300) can move above the second inspection station (720) so that the visual inspection device (300) can visually inspect the barcode on the PCB on the second positioning fixture (210) at the second inspection station (720).
2. The optical module PCB barcode inspection machine according to claim 1, characterized in that: The first conveying device (100) includes two supports (120) and two belts (130). The two supports (120) are both mounted on the frame (700). The two belts (130) are rotatably connected to the two supports (120). The two belts (130) abut against the two sides of the first positioning fixture (110). The two belts (130) can convey the first positioning fixture (110) from back to front. The gap between the two supports (120) is used for the first positioning fixture (110) to move.
3. The optical module PCB barcode inspection machine according to claim 2, characterized in that: Both supports (120) are provided with support blocks (140), and the two support blocks (140) are respectively located in the two belts (130). The two support blocks (140) abut against the two sides of the first positioning fixture (110) through the belts (130).
4. The optical module PCB barcode inspection machine according to claim 2, characterized in that: One of the supports (120) is slidably connected to the frame (700) so that the distance between the two supports (120) can be adjusted.
5. The optical module PCB barcode inspection machine according to claim 4, characterized in that: The frame (700) is provided with two slide rails (150), both of which are parallel to the left and right directions. One of the supports (120) is provided with sliders (160) at both ends. The two sliders (160) are slidably connected to the two slide rails (150).
6. The optical module PCB barcode inspection machine according to claim 5, characterized in that: One of the supports (120) is provided with two slide rail (150) limiters, which can be clamped onto the two slide rails (150) respectively.
7. The optical module PCB barcode inspection machine according to claim 2, characterized in that: It also includes a first limiting device (500), which is disposed on the frame (700). The first limiting device (500) can abut against the first positioning fixture (110) on the two belts (130) so that the first positioning fixture (110) stays at the first detection station (710).
8. The optical module PCB barcode inspection machine according to claim 7, characterized in that: The first limiting device (500) includes a lifting cylinder (510) and a limiting block (520). The cylinder body of the lifting cylinder (510) is connected to the frame (700), and the piston rod of the lifting cylinder (510) is connected to the limiting block (520). The lifting cylinder (510) can drive the limiting block (520) to rise, so that the limiting block (520) rises between the two belts (130) and abuts against the first positioning fixture (110) on the two belts (130).
9. The optical module PCB barcode inspection machine according to claim 1, characterized in that: It also includes a linear drive device (400), which is mounted on the frame (700). The output end of the linear drive device (400) is connected to the vision inspection device (300). The linear drive device (400) is used to drive the vision inspection device (300) to move in the left and right direction so that the vision inspection device (300) can move above the first inspection station (710) or the second inspection station (720).
10. The optical module PCB barcode inspection machine according to claim 9, characterized in that: The visual inspection device (300) includes a bracket (310), a camera (320) and an image detection module. The bracket (310) is connected to the output end of the linear drive device (400), and the camera (320) is mounted on the bracket (310).