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Device and method for double-sided ccd detection of circuit board

A circuit board and double-sided technology, which is applied in the field of PCB manufacturing, can solve the problems of low efficiency of manual inspection by microscope, misjudgment of printed circuit board, and difficulty in realizing the movement track, etc., and achieves strong scalability, non-stop detection, and high-efficiency detection. Effect

Active Publication Date: 2021-08-24
CHANGSHU MUTUAL TEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used microscopes are low in efficiency for manual inspection, and there are missed inspections for a long time. The more advanced printed circuit board CCD method is to install an upper line array camera and a lower line array camera on the upper and lower sides of the rowing reel, and the printed circuit board to be tested goes online through the rowing reel. Travel between the array camera and the lower line array camera, and use the upper line array camera and the lower line array camera to take pictures on both sides of the printed circuit board to be tested during the travel process to realize automatic optical inspection
[0003] However, the printed circuit board under test transported by the rollers may be in a bumpy state due to the jumping of the rollers during the traveling process, so it is difficult to achieve a fixed motion track at the micro level
Due to the existence of the above problems, the general CCD detection method may have misjudgment or missed defects in the detection process of printed circuit boards.

Method used

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  • Device and method for double-sided ccd detection of circuit board
  • Device and method for double-sided ccd detection of circuit board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A device for double-sided CCD detection of a circuit board, comprising:

[0033] Fixed plate 1: it is circular, with a fixed window 101 adapted to the shape of the circuit board to be tested in the middle, and a fixed card 102 is provided at the opposite corner of the fixed window; the edge of the fixed plate gradually becomes thinner from the inside to the outside; The edge of the fixed plate is provided with a locking groove 103, which can make the circuit board 5 on the fixed plate in a proper vertical posture before rolling down; the surface of the fixed plate near the fixed window is provided with The positioning point 104; the positioning point is printed on the surface of the fixed plate 1;

[0034] Slide rail group 2: including a storage and release device 210, a track 220, and a storage device 230; the storage and release device 210 sorts and sequentially releases the fixed boards 1 fixed into the circuit board; the tracks of the rails 220 are wavy lines, It i...

Embodiment 2

[0044] A detection method of a circuit board double-sided CCD detection device, the steps are as follows:

[0045] Install the circuit board on the fixed plate, roll the fixed plate from the initial high point of the track at zero initial speed, and the low speed at the initial low point of the track, when the CCD camera judges that the positioning point reaches the designated position, take pictures and analyze and process them; then The fixed plate rolls down from the second vertex at a lower speed, and when it reaches the third vertex, it just rolls 180 degrees compared to the state at the second vertex, and takes another photo for analysis; after the fixed plate passes the third vertex, if there is no If there is a problem, it will fall off and cause the storage device; if it is detected, the third block in the end will be lifted to stop the fixing plate here or guide it to another storage device, leaving it to be repaired or eliminated.

Embodiment 3

[0047] The same batch of circuit boards were detected by microscope detection, ordinary CCD detection, and CCD detection by this method, and the results were as follows:

[0048]

[0049] Wherein, there are 8 kinds of 75PCS of bad types of test samples; the microscope detection rate is 90% (69 / 75); the common CCD detection rate is 97% (75 / 77); the CCD detection rate of this method is 100% (77 / 75); 77), slightly better than ordinary CCD detection rate.

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Abstract

This case involves a double-sided CCD detection device and detection method for a circuit board, including: a fixed plate, a slide rail set, and a CCD camera. The fixed plate drives the circuit board to roll on the slide rail set, and completes the CCD detection of the circuit board during the rolling process. ;In this case, the relatively set CCD camera is used to take pictures when the fixed plate passes the second and third fixed points of the track at low speed, so as to realize simultaneous rapid detection of different angles and double sides, and improve the detection accuracy; through the rolling of the fixed plate on the slide rail group, the realization Automatic and continuous efficient detection.

Description

technical field [0001] The invention belongs to the field of PCB manufacturing, and in particular relates to a device and a detection method for double-sided CCD detection of a circuit board. Background technique [0002] With the development of miniaturization of assembly components, the wiring area and pattern design area of ​​PCB are also continuously reduced. In order to adapt to this development trend, PCB designers and manufacturers are constantly updating design concepts and manufacturing methods. As the integration level of PCB becomes higher and higher, the process becomes more and more complex, and the manufacturing threshold and difficulty become higher and higher, and higher and higher requirements are put forward for quality inspection methods. At present, in the manufacturing process of printed circuit boards, manual inspection with microscope or automatic optical inspection (CCD) is mainly used to find circuit defects on both sides of printed circuit boards, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/956
CPCG01N21/956G01N2021/95638
Inventor 林睦群
Owner CHANGSHU MUTUAL TEK CO LTD
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