Copper leakage detection method and device for circuit board

Abstract

The invention discloses a copper leakage detection method and device for a circuit board. The method comprises the steps of acquiring image information of a cutting edge in the circuit board; according to the image information, obtaining a first coordinate set of each point in a cutting area of the cutting edge and a second coordinate set of each point in a non-cutting area based on a visual algorithm; fitting and determining a cutting straight line according to the first coordinate set; fitting and determining an edge reference line according to the second coordinate set; determining the maximum distance between the cutting straight line and the edge reference line according to the first coordinate set, the cutting straight line and the edge reference line; and obtaining a copper leakagedetection result of the circuit board according to the maximum distance. The circuit board copper leakage detection method provided by the embodiment of the invention is simple and easy to implement,can automatically, quickly and effectively detect the copper leakage condition of the circuit board, can replace manual operation, greatly improves the detection efficiency, is lower in implementationcost, and facilitates the saving of the processing cost.

Description

technical field [0001] The embodiments of the present invention relate to a circuit board defect detection technology, in particular to a circuit board copper leakage detection method and device. Background technique [0002] After the circuit board is surface-mounted (STM) and plug-in (DIP), in order to facilitate the selection and use of the circuit board part, it is usually necessary to use a splitter to perform board splitting operations. [0003] When cutting the circuit board, the sub-board machine is affected by the non-standard production of the sub-board program, the low precision of the fixture, and the low precision of the sub-board machine itself. It may occur that the cutting point is too deep and cuts into the inner circuit. The phenomenon of layer circuit is called copper leakage. When the inner layer circuit is cut, it will cause the circuit board to be short-circuited or disconnected, causing the circuit board to be scrapped. [0004] At present, the detec...

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Problems solved by technology

[0005] The invention provides a method and device for detecting copper leakage of circuit boards, so as to realize automatic detection of copper leakage of circuit boards after cutting by a board splitter, so as to solve the problem of low accuracy, low efficiency and high processing cost of circuit board copper leakage detection The problem

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