A method for inspecting differential vias in a pcb and related devices
A technology of differential vias and inspection methods, applied in the fields of instrumentation, computing, electrical and digital data processing, etc., can solve problems such as affecting the performance of hardware implementation, missed inspection, and low inspection efficiency.
Active Publication Date: 2022-02-18
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 cycle of the PCB, but also easily leads to missed inspections due to manual inspection, which greatly reduces the PCB design. quality, which affects performance after hardware implementation
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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 present application discloses a method for inspecting differential vias in a PCB, which includes: searching for via hole coordinates and corresponding outgoing line inflection point coordinates according to the via hole ID of the via hole; searching on the differential line corresponding to the signal line to be inspected The differential vias corresponding to the vias and the corresponding differential via coordinates, according to the differential via coordinates, find the corresponding differential outgoing line inflection point coordinates; judge the first line segment between the via hole coordinates and the outgoing line inflection point coordinates and the differential via hole coordinates Whether the second line segment between the inflection point coordinates of the differential outgoing line is symmetrical; if so, it is judged that the via hole and the differential via hole have passed the inspection. By acquiring the coordinates of via holes and differential via holes, automatic inspection of via holes in the PCB is realized, and inspection efficiency is improved. The application also 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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IPC IPC(8): G06F30/398
CPCG06F30/398
Inventor 李艳军
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD