CN213875469U - PCB defect detection platform based on machine vision - Google Patents
PCB defect detection platform based on machine vision Download PDFInfo
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- CN213875469U CN213875469U CN202022394916.3U CN202022394916U CN213875469U CN 213875469 U CN213875469 U CN 213875469U CN 202022394916 U CN202022394916 U CN 202022394916U CN 213875469 U CN213875469 U CN 213875469U
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Abstract
The utility model discloses a PCB board defect detecting platform based on machine vision. The adjusting device comprises a base, rack sliding tables, adjusting devices, a light source and a camera, wherein the rack sliding tables are vertically arranged on one side of the top surface of the base, and the two adjusting devices are respectively and fixedly connected to the rack sliding tables; one of the two light sources is connected with the light source adjusting device in a sliding way, and the other light source is arranged on the top surface of the base; the camera is arranged right above the base and is fixedly connected with the camera adjusting device; the adjusting device comprises a light source adjusting device and a camera adjusting device; the light source adjusting device and the camera adjusting device are respectively fixedly connected with the second sliding block and the first sliding block and slide along the length direction of the guide rail through the two sliding blocks, the light source adjusting device is connected with the light source in a sliding mode, and the camera adjusting device is fixedly connected with the camera; light source adjusting device arranges in camera adjusting device below, the utility model discloses realize high accuracy, efficient visual identification.
Description
Technical Field
The utility model belongs to the technical field of the check out test set, specifically speaking is a PCB board defect detecting platform based on machine vision.
Background
The PCB serves as a substrate for electronic component mounting and a key interconnection, and any electronic device or product is equipped with the term "mother of electronic product".
The ceramic PCB has a complex manufacturing process, and is affected by various factors in the whole PCB production process, and defects such as open circuit, short circuit, protrusion, recess, hole, and the like may be generated in each link. The automatic optical detection technology widely applied to PCB defect detection at present is a non-contact detection method taking machine vision as a core, and the method forms a set of system by hardware such as a light source, a camera, a computer and the like and software technologies such as image processing, mode recognition and the like, and can replace eyes and brains of people to carry out recognition and analysis. Before machine vision is applied to PCB defect detection, the conventional methods are manual detection, flying probe test and functional test. With the increasing precision of electronic products and the increasing complexity of the circuit distribution on the PCB, the drawbacks of the conventional detection methods become more and more prominent, and it is difficult to meet the industrial requirements.
Although China is a large country for manufacturing and exporting PCBs, the industry starts late in the field of automatic optical detection, detection equipment of most enterprises depends on import, the products are expensive, and the defects of complex adjustment, poor flexibility and low efficiency exist, so that the detection equipment is hardly accepted by domestic small and medium-sized PCB manufacturers, most enterprises mainly adopt manual detection, the efficiency is low, the false detection rate is high, data collection is difficult, and the detection equipment has no advantages in product competition.
SUMMERY OF THE UTILITY MODEL
1. The purpose of the utility model
The utility model aims at providing a can replace PCB board defect detecting platform of manual detection method completely, aim at solving current PCB detection mechanism structure complicacy, adjust loaded down with trivial details, flexible low, with high costs technological problem.
2. The technical proposal adopted by the utility model
The utility model discloses a PCB defect detecting platform based on machine vision, which comprises a base, a rack sliding table, adjusting devices, a light source and a camera, wherein the rack sliding table is vertically arranged on one side of the top surface of the base, and the two adjusting devices are respectively and fixedly connected on the rack sliding table; one of the two types of light sources is connected with the light source adjusting device in a sliding way, and the other one is arranged on the top surface of the base; the camera is arranged right above the base and is fixedly connected with the camera adjusting device; the adjusting device comprises a light source adjusting device and a camera adjusting device; the light source adjusting device and the camera adjusting device are respectively fixedly connected with the second sliding block and the first sliding block and slide along the length direction of the guide rail through the two sliding blocks, the light source adjusting device is connected with the light source in a sliding mode, and the camera adjusting device is fixedly connected with the camera; the light source adjusting device is arranged below the camera adjusting device.
Preferably, the rack sliding table comprises a guide rail, a first sliding block and a second sliding block; the guide rail is fixedly connected with the base, and the first sliding block and the second sliding block are both in sliding connection with the guide rail and can slide along the length direction of the guide rail; the first sliding block and the second sliding block are fixedly connected with the two adjusting devices respectively.
Preferably, the light source comprises a first strip light source, a backlight light source and a second strip light source; the backlight source is movably arranged on the top surface of the base, and the strip-shaped light source I and the strip-shaped light source II are in sliding connection with the light source adjusting device and are symmetrically arranged above the backlight source.
Preferably, the camera includes an industrial camera, a lens and a polarizing plate; the industrial camera is fixedly connected with the camera adjusting device and is arranged right above the backlight light source, the lower end of the industrial camera is fixedly connected with the lens, and the lower end of the lens is fixedly connected with the polaroid.
Preferably, the light source adjusting device comprises a y-direction bracket, an x-direction bracket, a first fastening screw and a second fastening screw, and the brackets are provided with guide grooves along the direction of the brackets; the y-direction bracket is fixedly connected with the second sliding block; the x-direction bracket is connected with the y-direction bracket in a sliding manner through the first fastening screw and slides and rotates along the direction of the guide groove of the y-direction bracket; the strip-shaped light source II is connected with the x-direction support in a sliding mode through the fastening screw II and slides along the direction of the guide groove of the x-direction support, and the strip-shaped light source II slides and rotates along the guide groove of the y-direction support through the x-direction support; and the other x-direction bracket and the x-direction bracket are symmetrically distributed above the backlight light source.
Preferably, the camera adjusting device comprises a camera clamping device and a y-direction rack sliding table; the camera is fixedly connected with the camera clamping device, and the camera clamping device is fixedly connected with the y-direction rack sliding table and slides along the y-direction rack sliding table; the y-direction rack sliding table is fixedly connected with the sliding block; the camera adjusting device slides along the length direction of the guide rail through the sliding block.
3. The utility model has the advantages of
(1) The technical scheme of the utility model, acquire clear PCB surface characteristic through introducing defect detection hardware platform, follow-up recombination image processing software can replace artifical the detection, has avoided artifical visual inspection method because of the error that subjective factor caused effectively, has showing high efficiency and the real-time of detecting that has improved.
(2) The technical scheme of the utility model, camera adjusting device gives 2 degrees of freedom of camera can make the camera fix a position the determinand fast, can acquire different field of vision scope and then satisfy the detection requirement of not unidimensional PCB board simultaneously. The light source adjusting device gives 4 degrees of freedom to the light source, so that illumination in a visual field range is uniform, and an imaging effect is improved. And the adjusting device has the advantages of simple structure, convenient operation, low cost and strong practicability.
(3) The technical scheme of the utility model, the strip light source with the polaroid combination, the reflection of light that can filtering metal conductive band realizes the accurate extraction to defects such as PCB board conductive band short circuit, open circuit, arch, sunken and conductive band overlap area undersize. The backlight source can accurately extract the hole area defects on the conductive strips. Through the combination of the front surface polishing mode and the back surface polishing mode, all defect types of the existing PCB bare board can be accurately extracted.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic overall structure diagram of a PCB defect detection testing platform based on machine vision according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the camera in fig. 1.
In the figure:
1. a base; 2. a rack sliding table; 21. a guide rail; 22. a first sliding block; 23. a second sliding block; 3. an adjustment device; 31. a light source adjusting device; 311. a y-direction bracket; 312. an x-direction bracket; 313. a first fastening screw; 314. A second fastening screw; 32. a camera adjustment device; 321. a camera holding device; 322. a y-direction rack sliding table; 4. a light source; 41. a strip-shaped light source I; 42. a backlight light source; 43. a strip-shaped light source II; 5. a camera; 51. An industrial camera; 52. a lens; 53. a polarizing plate.
Detailed Description
The technical solutions in the examples of the present invention will be described clearly and completely with reference to the accompanying drawings in the examples of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
The following describes an example of the present invention in further detail with reference to the accompanying drawings.
Example 1
Referring to fig. 1-2, the embodiment of the utility model provides a PCB board defect detecting platform based on machine vision, including base 1, rack slip table 2, adjusting device 3, light source 4 and camera 5, the vertical rack slip table 2, two of being equipped with in base 1 top surface one side adjusting device 3 is slidable mounting respectively on rack slip table 2. The first strip light source 41 and the second strip light source 43 are slidably connected with the light source adjusting device 31, and the backlight source 42 is placed on the top surface of the base 1. The camera 5 is arranged right above the bottom plate 1 and is fixedly connected with the camera adjusting device 32. The positions of the first strip light source 41, the second strip light source 43 and the camera 5 are adjusted by adjusting the adjusting device 3.
In a specific embodiment, the light source adjusting device 31 and the camera adjusting device 32 are sequentially and fixedly connected to the rack sliding table 2. Adjusting knobs are arranged on one sides of the first sliding block 22 and the second sliding block 23, the adjusting device 3 is rotated to slide along the length direction of the guide rail 21 to adjust the positions of the light source 4 and the camera 5 relative to an object to be detected, the imaging quality of a PCB is improved, and accurate extraction of defects is facilitated. And locking devices are arranged on the other sides of the first sliding block 22 and the second sliding block 23 and used for locking the adjusting device 3 at the current position so as to prevent the imaging quality from changing due to misoperation.
The light source adjusting device 31 comprises a y-direction bracket 311, an x-direction bracket 312, a first fastening screw 313 and a second fastening screw 314, and the brackets are provided with guide grooves along the directions of the brackets. The first fastening screw 313 connects the x-bracket 312 to the guide slot of the y-bracket 311, and the x-bracket 312 can slide and rotate in the guide slot by adjusting the first fastening screw 313. The second bar-shaped light source 43 is connected to the guide groove of the x-direction bracket 312 through the second fastening screw 314, and the second bar-shaped light source 43 can slide along the guide groove by adjusting the second fastening screw 314. The light source adjusting device gives 4 degrees of freedom to the light source, so that all areas in the visual field range can be uniformly illuminated during shooting,
the camera adjusting device 32 comprises a camera clamping device 321 and a y-direction rack sliding table 322. One side of the camera clamping device 32 is fixedly connected with the y-direction rack sliding table 322, and the other side is connected with the camera 5. The camera adjusting device 32 enables the camera 5 to slide along the z direction and the y direction through the first sliding block 22 and the y-direction rack sliding table 322 respectively. And adjusting the position of the camera 5 to be used for quickly positioning the PCB to be detected, and meanwhile, adjusting the height to acquire images in different visual field ranges to realize detection of PCBs in different sizes.
The camera clamping device 321 is provided with two clamping plates, an adjusting screw rod and a guide rail. The rotary adjusting screw rod converts the spiral motion into linear motion, so that the two clamping plates move in opposite directions along the guide rail to clamp the camera 5, and meanwhile, the camera 5 can be detached at any time, and the rotary adjusting screw rod is flexible and convenient.
The camera 5 comprises an industrial camera 51, a lens 52 and a polaroid 53, wherein the industrial camera 51 comprises a CMOS chip which is not shown in the figure and is used for storing image information, the lens 52 comprises a focusing knob and an aperture knob which are respectively used for accurately focusing and adjusting the light incoming quantity of the camera, and the polaroid 53 is used for filtering the reflection of a metal conduction band on a PCB bare board to enable the shot image to be clearer.
The light source 4 includes a first stripe light source 41, a backlight light source 42 and a second stripe light source 43. The position of the strip-shaped light source is adjusted to ensure that all areas in the visual field range are uniformly illuminated. The first strip light source 41 and the strip light source 42 are located above the PCB to be detected, and the front strip light irradiation mainly comprises the accurate extraction of the defects of short circuit, open circuit, protrusion, depression, small lap joint area of the conductive strips of the PCB and the like. The backlight source 42 is located right below the PCB to be tested, and the planar backlight irradiation is mainly used for extracting the hole area defects on the conductive strips. Through the combination of front side strip light detection and plane backlight detection, all defect types of the existing PCB bare board can be accurately extracted.
Principle of operation
When the utility model is used, firstly, the backlight source 42 is arranged on the top surface of the base 1, the strip-shaped light sources I, 241 and 43 are arranged on the light source adjusting device 31, and the camera 5 is clamped on the camera clamping device 321; placing the PCB to be tested on the top surface of the glass object placing table positioned on the top surface of the backlight light source 42; the camera 5 observes the PCB and sends the image acquired in real time to the display through a transmission lead; according to the image effect of the PCB displayed in the display, the position of the camera 5 is adjusted through the camera adjusting device 32 to enable the PCB to occupy a proper position and size in the visual field range, clear PCB surface details are obtained by adjusting the aperture size and focusing of the lens 52, the PCB and the background have high contrast and the reflection of metal conductive strips is avoided by adjusting the brightness of the light source, and all areas in the visual field range are uniformly illuminated by adjusting the positions of the strip-shaped light sources I, 241 and 43 through the light source adjusting device 31. Therefore, the PCB image with high contrast, no reflection, high definition and uniform illumination can be observed on the display screen, and whether the PCB bare board has defects or not can be clearly seen.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a PCB board defect detecting platform based on machine vision which characterized in that: the adjusting device comprises a base, rack sliding tables, adjusting devices, a light source and a camera, wherein the rack sliding tables are vertically arranged on one side of the top surface of the base, and the two adjusting devices are respectively and fixedly connected to the rack sliding tables; one of the two types of light sources is connected with the light source adjusting device in a sliding way, and the other one is arranged on the top surface of the base; the camera is arranged right above the base and is fixedly connected with the camera adjusting device; the adjusting device comprises a light source adjusting device and a camera adjusting device; the light source adjusting device and the camera adjusting device are respectively fixedly connected with the second sliding block and the first sliding block and slide along the length direction of the guide rail through the two sliding blocks, the light source adjusting device is connected with the light source in a sliding mode, and the camera adjusting device is fixedly connected with the camera; the light source adjusting device is arranged below the camera adjusting device.
2. The PCB defect detecting platform based on machine vision of claim 1, wherein the rack sliding table comprises a guide rail, a first sliding block and a second sliding block; the guide rail is fixedly connected with the base, and the first sliding block and the second sliding block are both in sliding connection with the guide rail and can slide along the length direction of the guide rail; the first sliding block and the second sliding block are fixedly connected with the two adjusting devices respectively.
3. The machine vision based PCB board defect inspection platform of claim 1, wherein: the light source comprises a strip light source I, a backlight light source and a strip light source II; the backlight source is movably arranged on the top surface of the base, and the strip-shaped light source I and the strip-shaped light source II are in sliding connection with the light source adjusting device and are symmetrically arranged above the backlight source.
4. The machine vision based PCB board defect inspection platform of claim 3, wherein said camera comprises an industrial camera, a lens and a polarizer; the industrial camera is fixedly connected with the camera adjusting device and is arranged right above the backlight light source, the lower end of the industrial camera is fixedly connected with the lens, and the lower end of the lens is fixedly connected with the polaroid.
5. The PCB defect detecting platform based on machine vision is characterized in that the light source adjusting device comprises a y-direction bracket, an x-direction bracket, a first fastening screw and a second fastening screw, and the brackets are provided with guide grooves along the direction of the brackets; the y-direction bracket is fixedly connected with the second sliding block; the x-direction bracket is connected with the y-direction bracket in a sliding manner through the first fastening screw and slides and rotates along the direction of the guide groove of the y-direction bracket; the strip-shaped light source II is connected with the x-direction support in a sliding mode through the fastening screw II and slides along the direction of the guide groove of the x-direction support, and the strip-shaped light source II slides and rotates along the guide groove of the y-direction support through the x-direction support; and the other x-direction bracket and the x-direction bracket are symmetrically distributed above the backlight light source.
6. The PCB defect detecting platform based on machine vision of claim 3, wherein the camera adjusting device comprises a camera clamping device, a y-direction rack sliding table; the camera is fixedly connected with the camera clamping device, and the camera clamping device is fixedly connected with the y-direction rack sliding table and slides along the y-direction rack sliding table; the y-direction rack sliding table is fixedly connected with the sliding block; the camera adjusting device slides along the length direction of the guide rail through the sliding block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022394916.3U CN213875469U (en) | 2020-10-26 | 2020-10-26 | PCB defect detection platform based on machine vision |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022394916.3U CN213875469U (en) | 2020-10-26 | 2020-10-26 | PCB defect detection platform based on machine vision |
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| CN213875469U true CN213875469U (en) | 2021-08-03 |
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| CN202022394916.3U Active CN213875469U (en) | 2020-10-26 | 2020-10-26 | PCB defect detection platform based on machine vision |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114406507A (en) * | 2022-01-04 | 2022-04-29 | 华工法利莱切焊系统工程有限公司 | Device and method for detecting first workpiece of laser cutting machine and electronic equipment |
| KR102439516B1 (en) * | 2022-03-24 | 2022-09-01 | 유인열 | Inspection Device for Golf Balls |
| CN116430611A (en) * | 2022-07-28 | 2023-07-14 | 大鱼视觉技术(河南)有限公司 | Backlight detector |
| CN118200693A (en) * | 2024-05-08 | 2024-06-14 | 陕西领金时代网络科技有限公司 | Image processing test platform |
-
2020
- 2020-10-26 CN CN202022394916.3U patent/CN213875469U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114406507A (en) * | 2022-01-04 | 2022-04-29 | 华工法利莱切焊系统工程有限公司 | Device and method for detecting first workpiece of laser cutting machine and electronic equipment |
| KR102439516B1 (en) * | 2022-03-24 | 2022-09-01 | 유인열 | Inspection Device for Golf Balls |
| CN116430611A (en) * | 2022-07-28 | 2023-07-14 | 大鱼视觉技术(河南)有限公司 | Backlight detector |
| CN118200693A (en) * | 2024-05-08 | 2024-06-14 | 陕西领金时代网络科技有限公司 | Image processing test platform |
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