CN104949991A - Printed circuit board (PCB) automated optical inspection (AOI) system and PCB objective table suitable for same - Google Patents
Printed circuit board (PCB) automated optical inspection (AOI) system and PCB objective table suitable for same Download PDFInfo
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- CN104949991A CN104949991A CN201510257198.6A CN201510257198A CN104949991A CN 104949991 A CN104949991 A CN 104949991A CN 201510257198 A CN201510257198 A CN 201510257198A CN 104949991 A CN104949991 A CN 104949991A
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- circuit board
- objective table
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- printed circuit
- positioning area
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Abstract
The invention provides a printed circuit board (PCB) automated optical inspection (AOI) system and a PCB objective table suitable for the same. The PCB AOI system comprises a control server, a displacement electric cylinder, a first objective table and a second objective table, wherein the control server is used for controlling the displacement electric cylinder, the first objective table and the second objective table to work; the working surface of the first objective table is opposite to the second objective table and comprises a circuit board positioning area and an optical module area; an optical module for executing optical inspection on lines on the surface of a PCB to be inspected is arranged in the optical module area; the PCB objective table is provided with a plurality of air exhaust holes and a plurality of blow holes, which are formed in the circuit board positioning area in a distributed manner; the plurality of air exhaust holes and the plurality of blow holes are alternately arranged at intervals. The PCB AOI system provided by the invention has the effects of reducing the problem of misjudgment or flaw missing inspection appearing during AOI and effectively improving the AOI efficiency.
Description
Technical field
The present invention relates to printed circuit board (PCB) (Printed Circuit Board, PCB) field is manufactured, especially, relate to a kind of printed circuit board (PCB) automatic optics inspection (Automated Optical Inspection, AOI) system and a kind of printed circuit board (PCB) objective table being applicable to described automatic optical detecting system.
Background technology
At present the detection field of circuit board mainly utilize automatic optics inspection scheme to detect the circuit on printed circuit board (PCB) two sides short circuit, open circuit, pin hole, wiping is colored, line is young, line is thick and the defect such as canine tooth.Traditional printed circuit board (PCB) automatic optical detecting system mainly transmits above and below row rumble at printed circuit board (PCB) and all sets up CCD (Charge Coupled Device, charge-coupled image sensor) line-scan digital camera, move between the CCD line-scan digital camera that printed circuit board (PCB) is expert at above and below rumble, the position angle of light source is fixed; Optical detection is carried out by the upper and lower surface circuit of the CCD line-scan digital camera above and below row rumble to printed circuit board (PCB) in traveling process.
There is following defect in this automatic optics inspection scheme: in the transport process of printed circuit board (PCB), due to row rumble spacing size, row rumble transmission gear degree of engagement, row rumble is beated, the impact of the factors such as the thickness of printed circuit board (PCB), printed circuit board (PCB) is in the state of jolting in the process transmitted, and microcosmic is without fixing movement locus.Further, the structure of all setting up CCD line-scan digital camera above and below this row rumble operationally must be opened light source up and down simultaneously and take pictures, if the thinner light source that also can cause of printed circuit board (PCB) disturbs mutually.Above-mentioned factor may cause printed circuit board (PCB) to occur in automatic optics inspection process, and line defct is undetected and judge by accident.
Therefore, provide a kind of printed circuit board (PCB) automatic optical detecting system that can solve the problem necessary.
Summary of the invention
For the undetected technical matters with judging by accident of line defct that existing printed circuit board (PCB) automatic optical detecting system may occur, the invention provides a kind of printed circuit board (PCB) automatic optical detecting system; Meanwhile, the present invention also provides a kind of printed circuit board (PCB) objective table going for described printed circuit board (PCB) automatic checkout system.
Printed circuit board (PCB) automatic optical detecting system provided by the invention, described printed circuit board (PCB) automatic optical detecting system comprises Control Server, displacement electricity cylinder, first objective table and the second objective table, described Control Server is for controlling described displacement electricity cylinder, the duty of the first objective table and the second objective table, described displacement electricity cylinder is fixedly connected with described second objective table and drives described second objective table to move, wherein, the workplace of described first objective table is relative with the second objective table, the workplace of described first objective table comprises circuit board positioning area and optical module district, described optical module district is provided with the optical module performing the optical detection of test print circuit surface circuit, described circuit board positioning area has and is formed at multiple aspirating hole of described circuit board positioning area and multiple gas hole in a distributed manner, described multiple aspirating hole and the mutual alternate intervals of described multiple gas hole are arranged, wherein said aspirating hole fixes described test print circuit board by vacuum suction mode, described gas hole provides air-bed when the workplace horizontal transmission of described first objective table for described test print circuit board.
As the further improvement of above-mentioned printed circuit board (PCB) automatic optical detecting system, described optical module comprises CCD camera array and line source, described line source is arranged on described optical module area edge, and described CCD camera array is arranged between described line source and described circuit board positioning area.
As the further improvement of above-mentioned printed circuit board (PCB) automatic optical detecting system, the aperture of the described aspirating hole of described first objective table is greater than the aperture of described gas hole.
As the further improvement of above-mentioned printed circuit board (PCB) automatic optical detecting system, each aspirating hole of described first objective table is provided with independently non-return valve respectively.
As the further improvement of above-mentioned printed circuit board (PCB) automatic optical detecting system, described first objective table also comprises multiple position block, and described multiple position block is arranged at the edge of described circuit board positioning area respectively.
As the further improvement of above-mentioned printed circuit board (PCB) automatic optical detecting system, the workplace of described second objective table comprises circuit board positioning area and optical module district equally, the circuit board positioning area of wherein said second objective table comprises multiple aspirating hole in distributed arrangement, and the optical module district of described second objective table is provided with CCD camera array and line source.
As the further improvement of above-mentioned printed circuit board (PCB) automatic optical detecting system, described displacement electricity cylinder comprises horizontal shift electricity cylinder and perpendicular displacement electricity cylinder, wherein said second objective table is arranged on the end of described perpendicular displacement electricity cylinder, and described perpendicular displacement electricity cylinder is connected to described horizontal shift electricity cylinder.
The present invention also provides a kind of printed circuit board (PCB) objective table, comprise circuit board positioning area and optical module district, described optical module district is provided with the optical module performing the optical detection of test print circuit surface circuit, described circuit board positioning area is formed with multiple aspirating hole and multiple gas hole, described multiple aspirating hole and described multiple gas hole are all formed at described circuit board positioning area in a distributed manner, described gas hole provides air-bed when the workplace horizontal transmission of described printed circuit board (PCB) objective table for described test print circuit board, described aspirating hole fixes described printed circuit board (PCB) by vacuum suction mode.
As the further improvement of above-mentioned printed circuit board (PCB) objective table, each aspirating hole is respectively arranged with independently non-return valve.
As the further improvement of above-mentioned printed circuit board (PCB) objective table, also comprise the multiple position blocks being arranged on described circuit board positioning area edge.
Compared to prior art, printed circuit board (PCB) automatic optical detecting system provided by the invention and factor circuit plate objective table thereof can improve the displacement accuracy of test print circuit board and ensure the planarization of test print circuit board in automatic optics inspection process, reduce automatic optics inspection and occur erroneous judgement or the undetected problem of defect.In addition, described printed circuit board (PCB) automatic optical detecting system completes the automatic optics inspection of the upper and lower surface for test print circuit board when the second objective table comes and goes and moves horizontally, and can also effectively improve automatic optics inspection efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the structural representation of a kind of embodiment of printed circuit board (PCB) automatic optical detecting system provided by the invention.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Referring to Fig. 1, is the structural representation of a kind of embodiment of printed circuit board (PCB) automatic optical detecting system provided by the invention.Described printed circuit board (PCB) automatic optical detecting system 100 comprises base station 11, displacement electricity cylinder 12, first objective table 13, second objective table 14 and sorting platform 15.Preferably, in a particular embodiment, described printed circuit board (PCB) automatic optical detecting system 100 can also comprise Control Server (not shown).Wherein, described base station 11 is for carrying fixing described first objective table 13 and described sorting platform 15, described displacement electricity cylinder 12 is fixedly connected with described second objective table 14, and described displacement electricity cylinder 12 can control to drive described second objective table 14 to move with vertical direction in the horizontal direction.Described Control Server is for controlling the duty of described displacement electricity cylinder 12, first objective table 13, described second objective table 14 and described sorting platform 15.
Described displacement electricity cylinder 12 can comprise horizontal shift electricity cylinder 121 and perpendicular displacement electricity cylinder 122, and described second objective table 14 is arranged on the end of described perpendicular displacement electricity cylinder 122, and described perpendicular displacement electricity cylinder 122 is connected to described horizontal shift electricity cylinder 121 further.Particularly, described horizontal shift electricity cylinder 121 can carry out horizontal shift operation under the control of described Control Server, thus makes described perpendicular displacement electricity cylinder 122 drive described second objective table 14 to move in the horizontal direction; And described perpendicular displacement electricity cylinder 122 can carry out perpendicular displacement operation under the control of described Control Server, thus described second objective table 14 is driven vertically to move.Described horizontal shift electricity cylinder 121 and described perpendicular displacement electricity cylinder 122 can be servo electricity cylinder.
In a particular embodiment, surface relative with described second objective table 14 in described first objective table 13 can as the workplace 131 of described first objective table 13, and described workplace 131 has defined circuit board positioning area 132 and optical module district 133 successively along test print circuit board direction of transfer.Described circuit board positioning area 132 comprises position block 134, aspirating hole 135 and gas hole 136.Described position block 134 for positioning printed circuit board (PCB) to be measured, and separates described circuit board positioning area 132 and optical module district 133.Wherein said aspirating hole 135 and gas hole 136 are divided equally cloth and are arranged at described circuit board positioning area 132.Preferably, the number of described position block 134 can be three, and three is separately positioned on described circuit board positioning area 132 edge thus realizes three sides and surrounds described circuit board positioning area 132, the side stayed away from described optical module district 133 enters for the transmission of test print circuit board.Described aspirating hole 135 and described gas hole 136 are all arranged in distribution, and the alternate intervals setting successively of described aspirating hole 135 and described gas hole 136, preferably, the aperture of described aspirating hole 135 is greater than the aperture of described gas hole 136, and each described aspirating hole 135 is equipped with non-return valve, can improve pumping efficiency.
Described optical module district 133 comprises CCD camera array 137 and line source 138, wherein said CCD camera array 137 comprises multiple aligned CCD camera, and, the orientation of described multiple CCD camera is vertical with the tangential movement direction of described test print circuit board, with the overall width making the coverage of described CCD camera array 137 can cover described test print circuit board.Described line source 138 can be arranged on the edge in described optical module district 133, and substantially parallel with described CCD camera array 137.
Concrete structure and described first objective table 13 of described second objective table 14 are basically identical, repeat no more herein; But, the optical module district of described second objective table 14 and circuit board positioning area can be contrary with the described circuit board positioning area 132 of the first objective table 13 and the setting direction in optical module district 133.In addition, in a particular embodiment, the gas hole 136 of described first objective table 13 is optional structure for described second objective table 14, and in other words, described second objective table 14 can not arrange gas hole.
For understanding printed circuit board (PCB) automatic optical detecting system provided by the invention better, simply introduce the concrete testing process of printed circuit board (PCB) automatic optical detecting system 100 provided by the invention below.
First, test print circuit board by the horizontal transmission of previous stage row rumble to the circuit board positioning area 132 of described first objective table 13; Enter in the process of described circuit board positioning area 132 at described test print circuit board, described gas hole 136 is opened and is formed air-bed and make described test print circuit board can be sent to the circuit board positioning area 132 of described first objective table 13 with the state suspended, therefore only need to provide a less thrust just can promote its workplace 131 along described first objective table 13 to described test print circuit board to carry out horizontal transmission, can effectively avoid described test print circuit board in transmitting procedure, occur the problem that copper face scratches.
Described test print circuit board enters described circuit board positioning area 132 and after completing location by described position block 134, described aspirating hole 135 is opened thus to be realized smooth for described test print circuit board and be closely fixed on the surface of described circuit board positioning area 132 in the mode of vacuum suction, the phenomenon avoiding occurring that plate bending or plate stick up and affect the precision of automatic optics inspection.
Then, described Control Server controls described horizontal shift electricity cylinder 121 and drives the second objective table 14 of described perpendicular displacement electricity cylinder 122 and end thereof to be moved horizontally to above described first objective table 13, and in the process moved horizontally, carry out optical detection by the circuit of CCD camera array to the upper surface of described test print circuit board of described second objective table 14, for ease of describing, the application by the upper surface called after A face of described test print wiring board, and by another side called after B face.
After the optical detection in A face completes, described Control Server controls described perpendicular displacement electricity cylinder 122 and drives the second objective table 14 of its end to drop to described test print circuit board surface, and now the aspirating hole of described second objective table 14 is opened with the workplace described circuit board under test being adsorbed in described second objective table 14, the aspirating hole 135 of described first objective table 13 closes to discharge described test print circuit board in the process, and described first objective table 13 can also open described gas hole 136 to push described test print circuit board to described second objective table 14 so that the vacuum suction of described second objective table 14.Described test print circuit board by vacuum suction to described second objective table 14 workplace after, described Control Server controls described perpendicular displacement electricity cylinder 122 and drives the second objective table 14 of its end to rise to meet the preset height of described CCD camera array 137 shooting focal length.
Then, described horizontal shift electricity cylinder 121 moves horizontally towards described sorting platform 15 direction under the control of Control Server, can carry out optical detection at the CCD camera array 137 moving horizontally the first objective table 13 described in process to the B face of the test print circuit board being adsorbed in described second objective table 14.
After described second objective table 14 moves to above described sorting equipment 15, described second objective table 14 cuts out its aspirating hole so that the printed circuit board (PCB) through detecting is discharged into described sorting platform 15; Last described sorting platform 15 carries out sorting operation according to testing result to the printed circuit board (PCB) through detecting under the control of described Control Server.
Compared to prior art, printed circuit board (PCB) automatic optical detecting system provided by the invention can improve the displacement accuracy of test print circuit board and ensure the planarization of test print circuit board in automatic optics inspection process, reduces automatic optics inspection and occurs erroneous judgement or the undetected problem of defect.In addition, described printed circuit board (PCB) automatic optical detecting system completes the automatic optics inspection of the upper and lower surface for test print circuit board when the second objective table comes and goes and moves horizontally, and can also effectively improve automatic optics inspection efficiency.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a printed circuit board (PCB) automatic optical detecting system, it is characterized in that, comprise Control Server, displacement electricity cylinder, first objective table and the second objective table, described Control Server is for controlling described displacement electricity cylinder, the duty of the first objective table and the second objective table, described displacement electricity cylinder is fixedly connected with described second objective table and drives described second objective table to move, wherein, the workplace of described first objective table is relative with the second objective table, the workplace of described first objective table comprises circuit board positioning area and optical module district, described optical module district is provided with the optical module performing the optical detection of test print circuit surface circuit, described circuit board positioning area has and is formed at multiple aspirating hole of described circuit board positioning area and multiple gas hole in a distributed manner, described multiple aspirating hole and the mutual alternate intervals of described multiple gas hole are arranged, wherein said aspirating hole fixes described test print circuit board by vacuum suction mode, described gas hole provides air-bed when the workplace horizontal transmission of described first objective table for described test print circuit board.
2. printed circuit board (PCB) automatic optical detecting system according to claim 1, it is characterized in that, described optical module comprises CCD camera array and line source, described line source is arranged on described optical module area edge, and described CCD camera array is arranged between described line source and described circuit board positioning area.
3. printed circuit board (PCB) automatic optical detecting system according to claim 1, is characterized in that, the aperture of the described aspirating hole of described first objective table is greater than the aperture of described gas hole.
4. printed circuit board (PCB) automatic optical detecting system according to claim 3, is characterized in that, each aspirating hole of described first objective table is provided with independently non-return valve respectively.
5. printed circuit board (PCB) automatic optical detecting system according to claim 4, is characterized in that, described first objective table also comprises multiple position block, and described multiple position block is arranged at the edge of described circuit board positioning area respectively.
6. printed circuit board (PCB) automatic optical detecting system according to claim 1, it is characterized in that, the workplace of described second objective table comprises circuit board positioning area and optical module district equally, the circuit board positioning area of wherein said second objective table comprises multiple aspirating hole in distributed arrangement, and the optical module district of described second objective table is provided with CCD camera array and line source.
7. printed circuit board (PCB) automatic optical detecting system according to claim 1, it is characterized in that, described displacement electricity cylinder comprises horizontal shift electricity cylinder and perpendicular displacement electricity cylinder, wherein said second objective table is arranged on the end of described perpendicular displacement electricity cylinder, and described perpendicular displacement electricity cylinder is connected to described horizontal shift electricity cylinder.
8. a printed circuit board (PCB) objective table, it is characterized in that, comprise circuit board positioning area and optical module district, described optical module district is provided with the optical module performing the optical detection of test print circuit surface circuit, described circuit board positioning area is formed with multiple aspirating hole and multiple gas hole, described multiple aspirating hole and described multiple gas hole are all formed at described circuit board positioning area in a distributed manner, described gas hole provides air-bed when the workplace horizontal transmission of described printed circuit board (PCB) objective table for described test print circuit board, described aspirating hole fixes described printed circuit board (PCB) by vacuum suction mode.
9. printed circuit board (PCB) objective table according to claim 8, is characterized in that, each aspirating hole is respectively arranged with independently non-return valve.
10. printed circuit board (PCB) objective table according to claim 8, is characterized in that, also comprises the multiple position blocks being arranged on described circuit board positioning area edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510257198.6A CN104949991A (en) | 2015-05-19 | 2015-05-19 | Printed circuit board (PCB) automated optical inspection (AOI) system and PCB objective table suitable for same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510257198.6A CN104949991A (en) | 2015-05-19 | 2015-05-19 | Printed circuit board (PCB) automated optical inspection (AOI) system and PCB objective table suitable for same |
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| CN104949991A true CN104949991A (en) | 2015-09-30 |
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| CN201510257198.6A Pending CN104949991A (en) | 2015-05-19 | 2015-05-19 | Printed circuit board (PCB) automated optical inspection (AOI) system and PCB objective table suitable for same |
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Cited By (1)
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| CN106896112A (en) * | 2015-12-21 | 2017-06-27 | 深圳市青铜科技有限公司 | Flake class terminal is in vision-based detection by means of the optical imaging method of shadow shield |
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Application publication date: 20150930 |