CN112816504A - Get for instance system suitable for circuit board back - Google Patents
Get for instance system suitable for circuit board back Download PDFInfo
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- CN112816504A CN112816504A CN202110142300.3A CN202110142300A CN112816504A CN 112816504 A CN112816504 A CN 112816504A CN 202110142300 A CN202110142300 A CN 202110142300A CN 112816504 A CN112816504 A CN 112816504A
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- circuit board
- image capturing
- loading jig
- driving part
- board loading
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
- G01N2021/95638—Inspecting patterns on the surface of objects for PCB's
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Image Input (AREA)
Abstract
本发明涉及了一种适用于线路板背面的取像系统，包括有机座、支撑架、线路板装载治具、直线运动元件、第一动力驱动部以及图像抓取模组。支撑架固定于机座的上平面上，且用来支撑线路板装载治具。直线运动元件亦由支撑架进行支撑，以驱动线路板装载治具沿着前后方向进行位移运动。正对于线路板的预置放区域，在线路板装载治具上开设有多个拍照透视孔。第一动力驱动部由机座进行支撑，以驱动图像抓取模组进行位移运动，直至图像抓取模组停位于线路板装载治具的正下方。图像抓取模组可以直接透过拍照透视孔来实现对线路板背面图像的抓取，而无需进行翻面处理，协同其他图像抓取模组以同时实现对线路板背面、正面图像的抓取，有效地缩短的总取像用时。
The invention relates to an imaging system suitable for the back of a circuit board, comprising a machine base, a support frame, a circuit board loading jig, a linear motion element, a first power driving part and an image capturing module. The support frame is fixed on the upper plane of the machine base, and is used to support the circuit board loading jig. The linear motion element is also supported by the support frame to drive the circuit board loading jig to perform displacement movement along the front and rear directions. For the pre-placement area of the circuit board, a plurality of photographic perspective holes are opened on the circuit board loading fixture. The first power driving part is supported by the machine base to drive the image capture module to perform displacement movement until the image capture module stops just below the circuit board loading jig. The image capture module can directly capture the image on the back of the circuit board through the camera perspective hole, without the need for turning over, and cooperate with other image capture modules to capture the back and front images of the circuit board at the same time. , effectively shortening the total acquisition time.
Description
Technical Field
The invention relates to the technical field of non-standard equipment manufacturing, in particular to an image capturing system suitable for the back of a circuit board.
Background
A wiring board is an important electronic component, is a support for an electronic component, and is a provider of electrical connection of the electronic component. With the rapid development of the electronics industry, printed wiring boards are also rapidly developed toward multilayering and high density.
The surface quality of the circuit board has a crucial influence on the application performance. In the prior art, the circuit board is usually inspected manually for appearance to determine whether the size and shape of the circuit board meet the requirements, and additionally, whether the front surface and the back surface of the circuit board have solder bumps, impurities, stains, and the like is observed. However, the standard of the inspected product has the international universal standard of IPC and different customer requirements, so in order to ensure the qualified rate of the outflow product, the inspection personnel is required to be skilled in mastering the standard and the detection method through education training, but even if a large amount of training is invested, the problems of high leakage rate, low efficiency and the like exist by manual inspection. Therefore, the company develops a circuit board visual detection system.
Before the circuit board is formally detected, the circuit board needs to be lowered and reliably placed on a detection table top, and position locking is carried out. Followed by image acquisition of its surface by means of a high-speed camera. In the prior art, a high-speed camera is arranged right above a detection table top and can only take images of the front side of a circuit board. When back image taking operation is executed, direct image taking cannot be implemented due to shielding of the clamping jig, and therefore the circuit board needs to be turned over so that the back of the circuit board is opposite to the high-speed camera. From the above description, in the detection process, the circuit board needs to be turned over, which not only greatly increases the labor intensity of the operator, but also greatly reduces the detection efficiency of the circuit board. Thus, a skilled person is urgently needed to solve the above problems.
Disclosure of Invention
Therefore, in view of the above-mentioned problems and drawbacks, the present invention provides a system for imaging an image of a backside of a circuit board, which is obtained by collecting relevant data, evaluating and considering the data in multiple ways, and performing continuous experiments and modifications by a skilled person engaged in research and development for many years.
In order to solve the technical problem, the invention relates to an image capturing system suitable for the back of a circuit board, which comprises a base, a support frame, a circuit board loading jig, a linear motion element, a first power driving part and an image capturing module. The support frame is fixed on the upper plane of the base and used for supporting the circuit board loading jig. The linear motion element is also supported by the support frame to drive the circuit board loading jig to move along the front-back direction. Just for the preset area of the circuit board, a plurality of photographing perspective holes are formed in the circuit board loading jig. The first power driving part is supported by the machine base to drive the image capturing module to respectively perform displacement motion along the front-back direction, the left-right direction and the up-down direction until the image capturing module is stopped under the circuit board loading jig.
As a further improvement of the technical scheme of the invention, the image capturing module comprises a mounting substrate, a fixed seat, a camera shooting assembly, a bracket and an annular light source. The fixing seat is arranged on the mounting substrate and used for clamping the camera shooting assembly. The bracket is fixed on the mounting substrate and used for supporting the annular light source. The annular light source is arranged right above the camera shooting assembly.
As a further improvement of the technical solution of the present invention, the bracket is detachably fixed to the mounting substrate by screws, and correspondingly, the bracket is provided with a long waist-shaped mounting hole through which the screws are inserted and which extends in the vertical direction.
As a further improvement of the technical scheme of the invention, the image capture module further comprises a limiting unit. The limiting unit comprises a first photoelectric switch, a second photoelectric switch, a third photoelectric switch and an induction plate. The induction plate is detachably fixed on the mounting substrate. The first photoelectric switch, the second photoelectric switch and the third photoelectric switch which are matched with the inductive switch are detachably fixed on the first power driving part so as to be respectively used for limiting the upper limit position, the initial position and the lower limit position of the camera shooting assembly.
As a further improvement of the technical scheme of the invention, the image capturing module also comprises a safety sensing unit. The safety sensing unit comprises a transition bearing plate and a laser displacement sensor. The transition bearing plate is detachably fixed on the mounting base plate. The laser displacement sensor is detachably fixed on the transition bearing plate so as to sense the distance between the laser displacement sensor and the circuit board loading jig in real time.
As a further improvement of the technical scheme of the invention, the image capturing system suitable for the back surface of the circuit board also comprises a backlight unit. The backlight unit comprises a sliding plate, a second power driving part and a backlight source. The sliding plate is supported by the supporting frame and carries out directional displacement motion along the front-back direction under the action of the second power driving part until the sliding plate stops over the circuit board loading jig. The backlight is installed on the diapire of slide plate.
As a further improvement of the technical scheme of the invention, the backlight unit also comprises a sliding block component of the sliding rail. The sliding rail and sliding block assembly is arranged between the support frame and the sliding plate.
In the technical scheme disclosed by the invention, the image capturing module can directly capture the back image of the circuit board through the photographing perspective hole without manually or additionally arranging a turnover mechanism to turn over the image, and can simultaneously capture the back and front images of the circuit board in cooperation with other image capturing modules, so that the total image capturing time is effectively shortened. Therefore, the labor intensity of operators is effectively reduced, the overall structure of the image capturing system is simplified, and the detection efficiency of the circuit board is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a perspective view of an image capturing system suitable for the back surface of a circuit board according to the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic perspective view of an image capturing module in an image capturing system suitable for the backside of a circuit board according to the present invention.
Fig. 4 is a left side view of fig. 3.
Fig. 5 is a right side view of fig. 3.
Fig. 6 is a schematic perspective view of a circuit board loading jig in an image capturing system suitable for the back surface of a circuit board according to the present invention.
Fig. 7 is a schematic perspective view of a backlight unit in an image capturing system suitable for use on the back surface of a circuit board according to the present invention.
1-a machine base; 2-a support frame; 3-loading a jig for the circuit board; 31-photographic eye-holes; 4-a linearly moving element; 5-a first power drive section; 6-an image capture module; 61-a mounting substrate; 62-a fixed seat; 63-a camera assembly; 64-a scaffold; 641-long waist-shaped mounting holes; 65-ring light source; 66-a limiting unit; 661-first opto-electronic switch; 662-a second photoelectric switch; 663-third photoelectric switch; 664-induction plate; 67-a safety sensing unit; 671 transition force-bearing plate; 672-laser displacement sensor; 7-a backlight unit; 71-a slide plate; 72-a second power drive; 73-backlight source; 74-slide rail slide assembly.
Detailed Description
In the description of the present invention, it is to be understood that the terms "left", "right", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
To facilitate those skilled in the art to fully understand the technical solution disclosed in the present invention, the following detailed description is made in conjunction with specific embodiments, and fig. 1 and fig. 2 respectively show a schematic perspective view and a left side view of an image capturing system suitable for a back surface of a circuit board in the present invention, and it can be understood that the image capturing system mainly comprises a base 1, a supporting frame 2, a circuit board loading jig 3, a linear motion element 4, a first power driving unit 5, and an image capturing module 6. The supporting frame 2 is detachably fixed on the upper plane of the base 1 by means of screws, and is used for supporting the circuit board loading jig 3. The linear motion element 4 is also supported by the support frame 2 to drive the circuit board loading jig 3 to move back and forth. Just opposite to the preset placing area of the circuit board, a photographing perspective hole 31 (shown in fig. 6) is formed on the circuit board loading jig 3. As is known, when the circuit board is inspected, it is not necessary to capture the whole back side of the circuit board, and only a few key areas (such as dense solder areas and bent circuit areas) need to be selected, so that the number of the see-through holes 31 is preferably set to be plural and aligned with the pre-shot area of the circuit board. The first power driving part 5 is supported by the machine base 1 to drive the image capturing module 6 to perform displacement motion along the front-back direction, the left-right direction and the up-down direction respectively until the image capturing module 6 stops under the circuit board loading jig 3. Therefore, the image capturing module 6 can directly capture the back image of the circuit board through the photographing perspective hole 31 without manual or additional arrangement of a turn-over mechanism for turn-over processing, and can capture the back and front images of the circuit board simultaneously in cooperation with other image capturing modules, thereby effectively shortening the total image capturing time.
The image capturing system suitable for the back surface of the circuit board has the following working principle: after the circuit board loading jig 3 is clamped, the linear motion element 4 acts to drag the circuit board loading jig 3 and the circuit board to move integrally to the detection area. Meanwhile, the first power driving part 5 is started to drive the image capturing module 6 to perform displacement movement until the image capturing module is opposite to the area to be detected on the circuit board, so as to perform subsequent image capturing operation.
As a further optimization of the above-mentioned image capturing system structure suitable for the backside of the circuit board, as shown in fig. 3, the image capturing module 6 mainly comprises several parts, such as a mounting substrate 61, a fixing base 62, a camera module 63, a bracket 64, and a ring light source 65. The fixing base 63 is mounted on the mounting substrate 61 and is used for holding the camera module 63. The holder 64 is fixed to the mounting substrate 61 to support the ring-shaped light source 65. An annular light source 65 is disposed directly above the camera assembly 63. The annular light source 65 includes a plurality of LED lamps in a conical array. Each LED lamp irradiates on the surface of the lateral circuit board at an oblique angle, a small area is illuminated in a diffuse reflection mode, when the working distance is controlled to be 10-15mm, the edge and height changes of the tested circuit board can be highlighted, and the part which is difficult to see originally is highlighted, so that the image taking definition is effectively ensured, and the subsequent judgment of the surface defects of the circuit board is facilitated.
As can be seen from fig. 3, the bracket 64 is preferably detachably fixed to the mounting board 61 by screws, and the bracket 64 is provided with elongated waist-shaped mounting holes 641 through which screws are inserted and which extend in the vertical direction. Therefore, the relative height position of the annular light source 65 can be conveniently adjusted, and the relative distance between the annular light source and the camera module 63 can be further adjusted, so that the image capturing definition can be ensured.
As shown in fig. 3 and 4, the image capture module 6 is additionally provided with a limit unit 66 according to actual conditions. The position limiting unit 66 includes a first photoelectric switch 661, a second photoelectric switch 662, a third photoelectric switch 663, and an induction plate 664. The induction plate 664 is detachably fixed to the mounting substrate 61. The first photoelectric switch 661, the second photoelectric switch 662 and the third photoelectric switch 663 matched with the inductive switch 664 are detachably fixed on the first power driving part 5 to respectively define an upper limit position, an initial position and a lower limit position of the camera module 63. Therefore, the relative height position of the camera module 63 can be adjusted in real time according to the difference of the pre-image-taking areas of the circuit board, so as to ensure that the camera module has a proper view.
As shown in fig. 3 and 5, the image capture module 6 is additionally provided with a safety sensing unit 67 according to actual conditions. The safety sensing unit 67 includes a transition force-bearing plate 671 and a laser displacement sensor 672. The transition force bearing plate 671 is detachably fixed on the mounting base plate 61. The laser displacement sensor 672 is detachably fixed on the transition bearing plate 671 to sense the distance between the laser displacement sensor and the circuit board loading jig 3 in real time. Therefore, in the process of adjusting the relative height position of the camera module 63, the arrangement of the laser displacement sensor 672 can effectively prevent the image capturing module 6 from colliding with the circuit board loading jig 3, so as to ensure that the camera module 63 has high application safety.
Because the surface coating of circuit board has insulating paint layer, very easily leads to the formation of image blurring because of receiving the effect of surperficial reflection of light factor in the process that the module 6 snatchs the image of image snatching, and then influences subsequent outward appearance and judge. In view of this, as can also be seen from fig. 1, the image capturing system for the backside of the circuit board further includes a backlight unit 7. As shown in fig. 7, the backlight unit 7 includes a slide plate 71, a second power driving portion 72, and a backlight 73. The sliding plate 71 is supported by the support frame 2 and performs directional displacement motion along the front-back direction under the action of the second power 72 driving part until stopping at the position right above the circuit board loading jig 3. The backlight 73 is mounted on the bottom wall of the slide plate 71. Therefore, in the process of image capture performed by the image capture module 6, on one hand, the backlight unit eliminates the reflection phenomenon, thereby preventing the occurrence of the reflection phenomenon of the lens in the collected image; on the other hand, the circuit board presents a clear image and is captured by the image capture module 6, which is a good cushion for further image processing and analysis.
In order to ensure that the sliding plate 71 has good directionality in the sliding process and further ensure the alignment accuracy of the backlight 73 and the circuit board to be detected, as a further optimization of the above-mentioned image capturing system structure suitable for the back side of the circuit board, as shown in fig. 7, the backlight unit 7 further includes a sliding block assembly 74. A sliding rail slider assembly 74 is arranged between the support frame 2 and the sliding plate 71.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. An image capturing system suitable for the back of a circuit board is characterized by comprising a base, a support frame, a circuit board loading jig, a linear motion element, a first power driving part and an image capturing module; the supporting frame is fixed on the upper plane of the base and used for supporting the circuit board loading jig; the linear motion element is also supported by the support frame so as to drive the circuit board loading jig to perform displacement motion along the front-back direction; a plurality of photographing perspective holes are formed in the circuit board loading jig right opposite to the preset placing area of the circuit board; the first power driving part is supported by the machine base to drive the image capturing module to perform displacement motion along the front-back direction, the left-right direction and the up-down direction respectively until the image capturing module stops under the circuit board loading jig.
2. The image capturing system suitable for the backside of a circuit board of claim 1, wherein the image capturing module comprises a mounting substrate, a fixing base, a camera module, a bracket and a ring-shaped light source; the fixed seat is arranged on the mounting substrate and is used for clamping the camera shooting assembly; the bracket is fixed on the mounting substrate and used for supporting the annular light source; the annular light source is arranged right above the camera shooting assembly.
3. The image capturing system for the backside of a circuit board as claimed in claim 2, wherein the bracket is detachably fixed to the mounting substrate by screws, and the bracket is correspondingly provided with a long-strip-shaped mounting hole for the screws to pass through and extending along a vertical direction.
4. The imaging system suitable for the backside of circuit board of any of claims 2-3, further comprising a limiting unit; the limiting unit comprises a first photoelectric switch, a second photoelectric switch, a third photoelectric switch and an induction plate; the induction plate is detachably fixed on the mounting substrate; the first photoelectric switch, the second photoelectric switch and the third photoelectric switch which are matched with the inductive switch are detachably fixed on the first power driving part so as to respectively limit the upper limit position, the initial position and the lower limit position of the camera shooting assembly.
5. The image capturing system suitable for the backside of the circuit board as claimed in any one of claims 2 to 3, further comprising a security sensor unit; the safety sensing unit comprises a transition bearing plate and a laser displacement sensor; the transition bearing plate is detachably fixed on the mounting base plate; the laser displacement sensor is detachably fixed on the transition bearing plate so as to sense the distance between the laser displacement sensor and the circuit board loading jig in real time.
6. The image capturing system suitable for the backside of circuit board of any of claims 1-3, further comprising a backlight unit; the backlight unit comprises a sliding plate, a second power driving part and a backlight source; the sliding plate is supported by the supporting frame and performs directional displacement motion along the front-back direction under the action of the second power driving part until the sliding plate stops right above the circuit board loading jig; the backlight source is arranged on the bottom wall of the sliding plate.
7. The image capturing system for backside of circuit board as claimed in claim 6, wherein the backlight unit further comprises a sliding rail assembly; the sliding rail sliding block component is arranged between the supporting frame and the sliding plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110142300.3A CN112816504A (en) | 2021-02-02 | 2021-02-02 | Get for instance system suitable for circuit board back |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110142300.3A CN112816504A (en) | 2021-02-02 | 2021-02-02 | Get for instance system suitable for circuit board back |
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| Publication Number | Publication Date |
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| CN112816504A true CN112816504A (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110142300.3A Pending CN112816504A (en) | 2021-02-02 | 2021-02-02 | Get for instance system suitable for circuit board back |
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| CN (1) | CN112816504A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116274246A (en) * | 2023-03-02 | 2023-06-23 | 上海涵道科技有限公司 | A dust removal device, equipment and dust removal method of an image acquisition device for a circular loom |
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| US5943125A (en) * | 1997-02-26 | 1999-08-24 | Acuity Imaging, Llc | Ring illumination apparatus for illuminating reflective elements on a generally planar surface |
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| CN116274246A (en) * | 2023-03-02 | 2023-06-23 | 上海涵道科技有限公司 | A dust removal device, equipment and dust removal method of an image acquisition device for a circular loom |
| CN116274246B (en) * | 2023-03-02 | 2025-10-28 | 上海涵道科技有限公司 | Dust removal device, device and dust removal method for image acquisition equipment for circular loom |
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Application publication date: 20210518 |