An inspection method for a differential via hole in a PCB and a related device
A differential via and inspection method technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of low inspection efficiency, prolong PCB development cycle, missed inspection, etc., to improve accuracy and efficiency Effect
Active Publication Date: 2019-04-26
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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Problems solved by technology
[0003] However, in the prior art, the differential vias in the PCB are generally inspected manually, which not only has extremely low inspection efficiency and prolongs the development cyc
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[0045] The core of this application is to provide an inspection method, an inspection system, a PCB inspection device, and a computer-readable storage medium for differential vias in a PCB. By judging the symmetry of differential and differential vias, the vias in the PCB are automatically inspected and the inspection efficiency is improved.
[0046] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0047]...
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The invention discloses an inspection method for a differential via hole in a PCB. The inspection method comprises the steps: obtaining via hole coordinates and corresponding outgoing line inflectionpoint coordinates of the via hole through searching according to a via hole ID of the via hole; Finding a differential via hole corresponding to the via hole and a corresponding differential via holecoordinate on the differential line corresponding to the to-be-checked signal line, and finding a corresponding differential outgoing line inflection point coordinate according to the differential viahole coordinate; Judging whether a first line segment between the via hole coordinates and the outgoing line inflection point coordinates is symmetrical with a second line segment between the differential via hole coordinates and the differential outgoing line inflection point coordinates; And if yes, judging that the via hole and the differential via hole pass inspection. The coordinates of thevia holes and the differential via holes are acquired, so that the via holes in the PCB can be automatically checked, and the checking efficiency is improved. The invention further discloses an inspection system, a PCB inspection device and a computer readable storage medium which have the above beneficial effects.
Description
technical field [0001] The present application relates to the technical field of PCB design, and in particular to a method for inspecting differential vias in a PCB, an inspection system, a PCB inspection device, and a computer-readable storage medium. Background technique [0002] With the continuous development of hardware design technology, the integrity of differential via design in PCB design is getting higher and higher. Differential vias need to be designed to be symmetrically placed in PCB, otherwise part of the differential mode signal will be converted to common mode. Signals, common mode signals may cause serious electromagnetic interference. Therefore, in order to ensure good signal integrity of the high-speed signal line and system stability in the current application, it is necessary to strictly check the differential vias after the PCB wiring is completed. [0003] However, in the prior art, the differential vias in the PCB are generally inspected manually, w...
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Login to View More IPC IPC(8): G06F17/50
CPCG06F30/398
Inventor 李艳军
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD