CN111291527A - Differential line spacing checking method, device, equipment and storage medium - Google Patents
Differential line spacing checking method, device, equipment and storage medium Download PDFInfo
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- CN111291527A CN111291527A CN202010034167.5A CN202010034167A CN111291527A CN 111291527 A CN111291527 A CN 111291527A CN 202010034167 A CN202010034167 A CN 202010034167A CN 111291527 A CN111291527 A CN 111291527A
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Abstract
The invention discloses a differential line spacing checking method, a device, equipment and a storage medium, wherein the differential line spacing checking method comprises the following steps: acquiring parameters of a positive signal line and a negative signal line of a differential line; determining the corresponding relation between the positive signal line segment and the negative signal line segment according to the acquired parameters, and defining the positive signal line segment and the negative signal line segment with the corresponding relation as a same-segment differential line; and solving the maximum distance between the positive signal line segment and the negative signal line segment in the same segment of differential line, and marking the line segments with the maximum distance not conforming to the preset distance. The device includes parameter acquisition unit, line segment classification unit and interval inspection unit, has realized the automatic differential line interval of inspection, can accomplish the differential line interval inspection fast, accurately, avoids appearing omitting.
Description
Technical Field
The invention relates to the field of PCB design, in particular to a differential line spacing checking method, a differential line spacing checking device, differential line spacing checking equipment and a storage medium.
Background
The earliest used PCBs (Printed Circuit boards) were paper-based copper-clad Printed boards. Since the advent of semiconductor transistors in the 50's of the 20 th century, the demand for PCBs has risen dramatically. Particularly, due to rapid development and wide application of integrated circuits, electronic devices are smaller and smaller, and the circuit wiring density and difficulty are higher and higher, which requires that PCBs are continuously updated. At present, the variety of the PCB is developed from a single-sided board to a double-sided board, a multilayer board and a flexible board; the structure and quality have also been developed to ultra-high density, miniaturization, and high reliability; new design methods, design articles, board making materials and board making processes are emerging continuously.
In recent years, a plurality of types of application software of computer aided design PCBs are available in the market, wherein Cadence is the most widely applied PCB design software in the industry, the Cadence has strong functions and a plurality of types of related software as support, an open secondary development interface and a more perfect development language library are provided, and users can carry out secondary development according to own needs.
When designing high-speed signal differential signal line, in order to guarantee signal quality, must guarantee that the maximum interval of positive signal line and negative signal line of differential signal line does not exceed the setting value, generally find the position that the interval is great through human eye observation among the prior art, then manual measurement interval, this kind of inspection method has observation error on the one hand, probably appears omitting, on the other hand mainboard high-speed signal line is more in quantity, needs to invest a large amount of manpower, time, inefficiency.
Disclosure of Invention
In order to solve the technical problems, the invention provides a differential line spacing checking method, a differential line spacing checking device, differential line spacing checking equipment and a storage medium, which realize automatic checking of differential line spacing, can quickly and accurately complete differential line spacing checking and avoid omission.
In order to achieve the purpose, the invention adopts the following technical scheme:
a differential line spacing inspection method, comprising:
acquiring parameters of a positive signal line and a negative signal line of a differential line;
determining the corresponding relation between the positive signal line segment and the negative signal line segment according to the acquired parameters, and defining the positive signal line segment and the negative signal line segment with the corresponding relation as a same-segment differential line;
and solving the maximum distance between the positive signal line segment and the negative signal line segment in the same segment of differential line, and marking the line segments with the maximum distance not conforming to the preset distance.
Further, the acquiring parameters of the positive signal line and the negative signal line of the differential line includes:
and acquiring the coordinates of the line segment end points of the positive signal line and the negative signal line.
Further, the determining a corresponding relationship between the positive signal line segment and the negative signal line segment according to the obtained parameters, and defining the positive signal line segment and the negative signal line segment having the corresponding relationship as a same-segment differential line includes:
determining the number of the segments of the positive signal line and the negative signal line according to the acquired parameters, and defining the signal line with the large number of the segments as an A signal line and the other signal line as a B signal line;
and calculating the distances between two end points β 1 and β 2 of a line segment B1 in the B signal line and all line segment end points of the A signal line, finding out minimum distance end points α 1 and α 2, wherein the end points α 1 and α 2 correspond to the line segment B1 of the B signal line along all line segments on the connection path of the A signal line, and form a same-segment differential line with the line segment B1.
Further, the solving the maximum distance between the positive signal line segment and the negative signal line segment in the same segment of the differential line includes:
the maximum spacing of the line segments is solved by the axlAirGap function.
Further, the marking of the line segment with the maximum distance not meeting the preset distance includes:
and lighting the line segment with the maximum distance not conforming to the preset distance.
Further, the preset pitch is twice the differential pitch.
The invention provides a differential line spacing inspection device, comprising:
the parameter acquisition unit is used for acquiring parameters of the positive signal line and the negative signal line of the differential line;
the line segment classification unit is used for determining the corresponding relation between the positive signal line segment and the negative signal line segment according to the acquired parameters and defining the positive signal line segment and the negative signal line segment with the corresponding relation as a same-segment differential line;
and the interval checking unit is used for solving the maximum interval between the positive signal line segment and the negative signal line segment in the same section of differential line and marking the line segment of which the maximum interval does not conform to the preset interval.
The invention provides a differential line spacing inspection device, which comprises:
a memory for storing a computer program;
a processor for implementing the steps of the differential line spacing checking method as described above when executing the computer program.
The storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the differential line spacing inspection method.
The invention has the beneficial effects that:
the invention provides a differential line spacing checking method, a differential line spacing checking device, differential line spacing checking equipment and a storage medium, which can automatically check the differential line spacing, make up for the defects of errors and omission in manual observation and measurement of the differential line spacing, realize automatic calculation and check of the differential line spacing through classification of corresponding line segments of differential lines, can quickly and accurately finish checking of a large number of differential line spacings, and greatly improve the design efficiency of a PCB.
Drawings
FIG. 1 is a schematic flow chart of a differential line spacing inspection method according to the present invention;
FIG. 2 is a schematic diagram of differential lines inspected by the differential line spacing inspection method of the present invention;
FIG. 3 is a schematic structural diagram of a differential line spacing inspection apparatus according to the present invention.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
As shown in fig. 1, an embodiment of the present invention discloses a differential line spacing checking method, including:
acquiring parameters of a positive signal line and a negative signal line of a differential line;
determining the corresponding relation between the positive signal line segment and the negative signal line segment according to the acquired parameters, and defining the positive signal line segment and the negative signal line segment with the corresponding relation as a same-segment differential line;
and solving the maximum distance between the positive signal line segment and the negative signal line segment in the same segment of differential line, and marking the line segments with the maximum distance not conforming to the preset distance.
Specifically, the obtaining parameters of the positive signal line and the negative signal line of the differential line includes:
network signals net1 and net2 of the differential line are obtained, pins pin1-1 and pin1-2 of net1 are obtained, and pins pin2-1 and pin2-2 of net2 are obtained.
The net1 and net2 paths each include a plurality of line segments cline, and the line segments of the two differential signal lines are stored in two arrays, respectively.
And acquiring the coordinates of the line segment end points of the positive signal line and the negative signal line, namely the starting point of each line segment.
The determining a corresponding relationship between the positive signal line segment and the negative signal line segment according to the obtained parameters, and defining the positive signal line segment and the negative signal line segment with the corresponding relationship as a same-segment differential line includes:
determining the number of segments of the positive signal line and the negative signal line according to the acquired parameters, and defining the signal line with the larger number of segments as an A signal line and the other signal line as a B signal line, wherein the A signal line in the differential line shown in FIG. 2 is composed of a1, a2 and … … a16 and the B signal line is composed of B1, B2, … … and B4 by taking FIG. 2 as an example;
calculating the distances between two end points β 1 and β 2 of a line segment B1 in the B signal line and all line segment end points of the A signal line, finding out minimum distance end points α 1 and α 2, wherein the end points α 1 and α 2 correspond to the line segment B1 of the B signal line along all line segments on the connection path of the A signal line, and form a same-segment differential line with the line segment B1;
specifically, taking the example of calculating the segment corresponding to the segment B3 in fig. 2 as an example, the distances between the segment B3 of the B signal line and all the segment end points of the a signal line are calculated, the distance between the left end point of the segment a7 and the left end point of the segment B3 is the smallest, and the distance between the right end point of the segment a3 and the right end point of the segment B3 is the smallest, so that the segments a3, a4, a5, a6 and a7 of the a signal line correspond to the segment B3 of the B signal line, that is, the segments a3-a7 and the segment B3 form the same differential line. By analogy, all line segments of the differential lines can be classified.
Solving the maximum distance between the positive signal line segment and the negative signal line segment in the same differential line segment comprises the following steps:
the maximum spacing of the line segments is solved by the axlAirGap function.
The line segment with the maximum mark distance not conforming to the preset distance comprises:
and lighting the line segment with the maximum distance not conforming to the preset distance.
The preset spacing is twice the differential line spacing, and meets the 2S3W rule of high-speed signal transmission pair signal spacing limitation.
As shown in fig. 3, an embodiment of the present invention further provides a differential line spacing inspection apparatus, including:
the parameter acquisition unit is used for acquiring parameters of the positive signal line and the negative signal line of the differential line;
the line segment classification unit is used for determining the corresponding relation between the positive signal line segment and the negative signal line segment according to the acquired parameters and defining the positive signal line segment and the negative signal line segment with the corresponding relation as a same-segment differential line;
and the interval checking unit is used for solving the maximum interval between the positive signal line segment and the negative signal line segment in the same section of differential line and marking the line segment of which the maximum interval does not conform to the preset interval.
The differential line spacing inspection equipment provided by the embodiment of the invention comprises:
a memory for storing a computer program;
a processor for implementing the steps of the differential line spacing checking method as described above when executing the computer program.
The storage medium provided by the embodiment of the present invention stores a computer program, and the computer program, when executed by a processor, implements the steps of the differential line spacing inspection method described above.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, the scope of the present invention is not limited thereto. Various modifications and alterations will occur to those skilled in the art based on the foregoing description. And are neither required nor exhaustive of all embodiments. On the basis of the technical scheme of the invention, various modifications or changes which can be made by a person skilled in the art without creative efforts are still within the protection scope of the invention.
Claims (9)
1. A differential line pitch inspection method, comprising:
acquiring parameters of a positive signal line and a negative signal line of a differential line;
determining the corresponding relation between the positive signal line segment and the negative signal line segment according to the acquired parameters, and defining the positive signal line segment and the negative signal line segment with the corresponding relation as a same-segment differential line;
and solving the maximum distance between the positive signal line segment and the negative signal line segment in the same segment of differential line, and marking the line segments with the maximum distance not conforming to the preset distance.
2. The differential line pitch inspection method of claim 1, wherein said obtaining parameters of the differential line positive signal line and the differential line negative signal line comprises:
and acquiring the coordinates of the line segment end points of the positive signal line and the negative signal line.
3. The differential line spacing inspection method according to claim 1, wherein said determining correspondence between positive signal line segments and negative signal line segments according to the obtained parameters, and defining the positive signal line segments and the negative signal line segments having the correspondence as the same differential line, comprises:
determining the number of the segments of the positive signal line and the negative signal line according to the acquired parameters, and defining the signal line with the large number of the segments as an A signal line and the other signal line as a B signal line;
and calculating the distances between two end points β 1 and β 2 of a line segment B1 in the B signal line and all line segment end points of the A signal line, finding out minimum distance end points α 1 and α 2, wherein the end points α 1 and α 2 correspond to the line segment B1 of the B signal line along all line segments on the connection path of the A signal line, and form a same-segment differential line with the line segment B1.
4. The differential line spacing inspection method of claim 1, wherein said solving for the maximum spacing of the positive signal line segment and the negative signal line segment in the same differential line segment comprises:
the maximum spacing of the line segments is solved by the axlAirGap function.
5. The differential line spacing inspection method of claim 1, wherein marking the line segments whose maximum spacing does not conform to a preset spacing comprises:
and lighting the line segment with the maximum distance not conforming to the preset distance.
6. The differential line pitch inspection method of claim 1, wherein the preset pitch is twice the differential line pitch.
7. A differential line pitch inspection device, comprising:
the parameter acquisition unit is used for acquiring parameters of the positive signal line and the negative signal line of the differential line;
the line segment classification unit is used for determining the corresponding relation between the positive signal line segment and the negative signal line segment according to the acquired parameters and defining the positive signal line segment and the negative signal line segment with the corresponding relation as a same-segment differential line;
and the interval checking unit is used for solving the maximum interval between the positive signal line segment and the negative signal line segment in the same section of differential line and marking the line segment of which the maximum interval does not conform to the preset interval.
8. A differential line spacing inspection apparatus, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the differential line spacing checking method according to any one of claims 1 to 6 when executing the computer program.
9. A storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the differential line spacing checking method according to any one of claims 1 to 6.
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| CN202010034167.5A CN111291527B (en) | 2020-01-15 | 2020-01-15 | Differential line spacing checking method, device, equipment and storage medium |
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| CN202010034167.5A CN111291527B (en) | 2020-01-15 | 2020-01-15 | Differential line spacing checking method, device, equipment and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111859847A (en) * | 2020-06-29 | 2020-10-30 | 苏州浪潮智能科技有限公司 | Method and device for detecting routing of printed circuit board and computer readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107194058A (en) * | 2017-05-19 | 2017-09-22 | 郑州云海信息技术有限公司 | One kind is segmented isometric automatic checking method and system based on differential pair on PCB |
| CN110362884A (en) * | 2019-06-26 | 2019-10-22 | 苏州浪潮智能科技有限公司 | The method and device that differential lines via hole threading checks in a kind of PCB design |
| CN110378062A (en) * | 2019-07-26 | 2019-10-25 | 苏州浪潮智能科技有限公司 | A kind of the pin wiring inspection method and relevant apparatus of differential lines |
| CN110502811A (en) * | 2019-08-08 | 2019-11-26 | 苏州浪潮智能科技有限公司 | A kind of PCB design method, equipment and storage medium |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107194058A (en) * | 2017-05-19 | 2017-09-22 | 郑州云海信息技术有限公司 | One kind is segmented isometric automatic checking method and system based on differential pair on PCB |
| CN110362884A (en) * | 2019-06-26 | 2019-10-22 | 苏州浪潮智能科技有限公司 | The method and device that differential lines via hole threading checks in a kind of PCB design |
| CN110378062A (en) * | 2019-07-26 | 2019-10-25 | 苏州浪潮智能科技有限公司 | A kind of the pin wiring inspection method and relevant apparatus of differential lines |
| CN110502811A (en) * | 2019-08-08 | 2019-11-26 | 苏州浪潮智能科技有限公司 | A kind of PCB design method, equipment and storage medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111859847A (en) * | 2020-06-29 | 2020-10-30 | 苏州浪潮智能科技有限公司 | Method and device for detecting routing of printed circuit board and computer readable storage medium |
| WO2022001132A1 (en) * | 2020-06-29 | 2022-01-06 | 苏州浪潮智能科技有限公司 | Routing inspection method and apparatus for printed circuit board, and computer-readable storage medium |
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| CN111291527B (en) | 2022-06-21 |
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