PCB online detecting method

A detection method and PCB board technology, applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve the problems of high real-time big data processing speed and slow speed

Active Publication Date: 2017-02-15
BEIJING LUSTER LIGHTTECH
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Problems solved by technology

[0005] An embodiment of the present invention provides a PCB online detection method to solve the conflict between high real-time performance and slow processing speed of large data of high-resolution color images in the prior art PCB online detection

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Embodiment Construction

[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0027] see figure 1 , is a schematic diagram of a working scene of a PCB online detection method provided by an embodiment of the present invention. Such as figure 1 As shown, several image acquisition devices are needed in online detection, and then the collected high-resolution color images are sent to several image acquisition workstations, with a resolution of at least 1270ppi, that is, at least at the level of 20-50 microns per pixel. The image acquisition workstation is mainly responsible for image acquisition and data compression, and the number can be expanded arbitrarily according to the PCB product inspection requirements; the image processing workstation...

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Abstract

The invention discloses a PCB online detecting method which is used for an image acquiring working station. The PCB online detecting method comprises the following steps: acquiring current PCB high-resolution colorful images which pass through the image acquiring working station in real time, wherein the resolution is 1,270 ppi at least; layering the high-resolution colorful images according to different colors in the images, carrying out extreme lossy compression on the images in each layer, and carrying out original lossless compression on images among the layers; and transmitting a preprocessing finish signal to an integrated control working station so that the integrated control working station can transmit compression data processing signals to idle image processing working stations in real time, wherein the preprocessing finish signal is a signal showing that compression data of high-resolution colorful images have been obtained, and the idle image processing working stations are image processing working stations which do not carry out image processing tasks at present. The image acquiring working station is matched with the distributed image processing working stations, and conflict between slow big data processing and high online instantaneity requirement can be solved.

Description

technical field [0001] The invention relates to the technical field of PCB production, in particular to a PCB online detection method. Background technique [0002] PCB (Printed circuit board, printed circuit board) is a provider of electrical connections for electronic components. The PCB board is based on the CAM data converted from the design data generated by the CAD software, and uses a laser photoplotter to etch a printed circuit board with conductive lines on the film base plate. Due to the limitation of the actual production level of the PCB board, there is a certain error between the design circuit diagram, so the actual production of the PCB board needs to be tested, and the detection methods are divided into two types: online detection and offline detection. On-line detection has become a more commonly used detection method because of its advantages of timely feedback of detection results, realization of process control, and prevention of secondary damage. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G01N21/956
CPCG01N21/84G01N21/956G01N2021/8411G01N2021/95638
Inventor 李金才姚毅
Owner BEIJING LUSTER LIGHTTECH
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