CN109446613B - Method and system for automatically checking bent routing - Google Patents
Method and system for automatically checking bent routing Download PDFInfo
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Abstract
The application discloses a method and a system for automatically checking bent routing, wherein the method comprises the following steps: determining a signal wire to be tested by adopting a zigzag-zag wiring technology; setting a distance threshold value of a bent wire in a signal wire to be detected; determining the length of the bent wire according to the ID information of the bent wire in the signal wire to be tested; judging whether the length of the bent routing is smaller than or equal to a distance threshold value or not; if yes, judging that the bent routing of the signal wire to be tested is qualified; otherwise, judging that the bent wiring of the signal wire to be tested is unqualified, and recording the unqualified bent wiring. The system comprises a to-be-detected signal line determining module, a threshold setting module, a wiring length determining module, a judging module and a recording module. By the method and the system, the checking accuracy and the checking efficiency of the bent routing can be greatly improved, so that the glass fiber effect of the PCB is effectively reduced.
Description
Technical Field
The present invention relates to the field of PCB (Printed Circuit Board) design technology, and in particular, to a method and system for automatically checking a bent trace.
Background
The glass fiber effect is the phenomenon that the relative dielectric constant of a PCB medium layer is locally changed due to gaps generated by interweaving warp and weft in the PCB glass cloth. Specifically, the glass cloth of the PCB is woven by warps and wefts, and a gap exists between the warps and wefts, so that two yarns of the high-speed differential yarns may run on the glass cloth one by one and run on the gap the other. Due to the fact that dielectric constants sensed by the signal lines are different when the signal lines run on the glass cloth and the gaps, time delay difference exists between the two lines of the high-speed differential lines, and therefore integrity of signals is affected. Therefore, in the technical field of PCB design of cloud computing products, in order to avoid the glass fiber effect of the PCB, it is an important task to check a bent trace in Zig-zag (a wiring technique using bent traces) traces in the PCB design.
At present, the method for inspecting the bent trace is generally: after Layout and wiring of the Layout engineer of the Layout and wiring are completed, the length of the bent wiring is manually checked according to the wiring rule set by the Intel, whether the length accords with the wiring rule set by the Intel is judged, the signal wire which does not accord with the wiring rule is screened out, and then subsequent processing is carried out, so that the influence of the glass fiber effect is reduced.
However, in the conventional method for inspecting the bent wires, the length of the bent wires is inspected manually, so that the missing inspection is inevitable, and therefore, the inspection accuracy is not high enough. And the manual inspection occupies a long time, which is not beneficial to shortening the PCB development period, so the current inspection efficiency is not high enough.
Disclosure of Invention
The application provides a method and a system for automatically checking bent wiring, which aim to solve the problem that the checking accuracy and the checking efficiency of bent wiring in the prior art are not high enough.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
a method of automatically inspecting a meandering trace, the method comprising:
determining a signal wire to be tested by adopting a zigzag-zag wiring technology, wherein the signal wire to be tested comprises a plurality of bent wires;
setting a distance threshold value of a bent routing wire in a signal wire to be tested, wherein the distance threshold value comprises: a horizontal distance threshold or a vertical distance threshold;
determining the length of the bent wire according to the ID information of the bent wire in the signal wire to be tested, wherein the length of the bent wire comprises the horizontal length of the bent wire or the vertical length of the bent wire;
judging whether the length of the bent routing is smaller than or equal to the distance threshold value;
if yes, judging that the bent routing of the signal wire to be tested is qualified;
otherwise, judging that the bent wiring of the signal wire to be tested is unqualified, and recording the unqualified bent wiring.
Optionally, the method for determining a signal line to be tested using a Zig-zag routing technique includes:
performing rapid filtering according to keywords of the signal line to be detected to obtain the signal line to be detected; alternatively, the first and second electrodes may be,
and screening according to the complete network name of the signal wire to be tested to obtain the signal wire to be tested.
Optionally, the determining, according to the ID information of the signal line to be tested, the length of the bent trace in the signal line to be tested includes:
extracting ID information of a bent routing wire in the signal wire to be detected;
inquiring Cline Segment attribute information of the bent routing according to the ID information;
determining the head and tail coordinates of the bent routing according to the Cline Segment attribute information;
according to the head and tail coordinates of the bent routing, determining the routing direction of the bent routing, wherein the routing direction comprises: left and right or up and down;
and calculating the length of the bent routing according to the head and tail coordinates and the routing direction of the bent routing.
Optionally, after determining that the bent trace of the signal line to be tested is not qualified and recording the unqualified bent trace, the method further includes:
and displaying the information of the unqualified bent routing.
Optionally, after the displaying the information of the unqualified bent trace, the method further includes:
and storing the information of the unqualified bent routing.
A system for automatically inspecting a buckled trace, the system comprising:
the device comprises a to-be-tested signal line determining module, a signal processing module and a signal processing module, wherein the to-be-tested signal line determining module is used for determining a to-be-tested signal line adopting a Zig-zag wiring technology, and the to-be-tested signal line comprises a plurality of bent wires;
the threshold value setting module is used for setting a distance threshold value of a bent routing wire in a signal wire to be tested, and the distance threshold value comprises: a horizontal distance threshold or a vertical distance threshold;
the trace length determining module is used for determining the length of the bent trace according to the ID information of the bent trace in the signal line to be detected, wherein the length of the bent trace comprises the horizontal length of the bent trace or the vertical length of the bent trace;
the judging module is used for judging whether the length of the bent routing is smaller than or equal to the distance threshold, if so, judging that the bent routing of the signal wire to be detected is qualified, and otherwise, judging that the bent routing of the signal wire to be detected is unqualified;
and the recording module is used for recording the bent routing judged to be unqualified by the judging module.
Optionally, the track length determining module includes:
the ID information extraction unit is used for extracting the ID information of the bent routing in the signal wire to be detected;
a Cline Segment attribute information query unit, configured to query Cline Segment attribute information of the bent trace according to the ID information;
the coordinate determination unit is used for determining the head and tail coordinates of the bent routing according to the Cline Segment attribute information;
the routing direction determining unit is used for determining the routing direction of the bent routing according to the head and tail coordinates of the bent routing, and the routing direction comprises: left and right or up and down;
and the routing length calculating unit is used for calculating the length of the bent routing according to the head and tail coordinates and the routing direction of the bent routing.
Optionally, the system further includes a display module, configured to display information of the unqualified bent trace.
Optionally, the system further includes a storage module, configured to store information of the unqualified bent trace.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the method comprises the steps of firstly determining a signal line to be detected by adopting a zigzag-zag wiring technology, setting a distance threshold value of the bent wiring in the signal line to be detected, secondly determining the length of the bent wiring in the signal line to be detected according to ID information of the bent wiring in the signal line to be detected, then judging whether the length of the bent wiring is smaller than or equal to the distance threshold value, and finally recording unqualified bent wiring according to a judgment result. By adopting the method, whether the bent routing in the signal wire to be detected is qualified or not can be automatically judged according to the preset distance threshold, so that the unqualified bent routing in the signal wire to be detected is selected, and the unqualified bent routing is automatically recorded. The method can automatically realize the inspection of the bent routing, can select all the signal wires to be tested, and judge whether the signal wires to be tested are less than or equal to the preset distance threshold value one by one, thereby avoiding the error of manual inspection. Moreover, the method automatically realizes the inspection of the bent routing, and can greatly improve the inspection efficiency, thereby shortening the PCB development period.
The application also provides a system for automatically checking the bent wiring, which mainly comprises a signal line determining module to be tested, a threshold setting module, a wiring length determining module, a judging module and a recording module. The method comprises the steps of firstly selecting a signal wire to be tested through a signal wire determining module to be tested, setting a distance threshold through a threshold setting module, then determining the length of a bent wire according to ID information of the signal wire to be tested through a wire length determining module, finally judging whether the bent wire of the signal wire to be tested is qualified or not according to a judging module, and recording unqualified bent wires through a recording module. The system in this application is equivalent to the instrument of the line is buckled in an automatic inspection, adopts this instrument of programming language development, replaces the manual inspection among the prior art, can improve greatly and buckle inspection accuracy and the inspection efficiency of walking the line to select unqualified signal line that awaits measuring, and then effectively reduce the fine effect of PCB glass.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart illustrating a method for automatically inspecting a meandering trace according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a system for automatically inspecting a meandering trace according to an embodiment of the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For a better understanding of the present application, embodiments of the present application are explained in detail below with reference to the accompanying drawings.
Example one
Referring to fig. 1, fig. 1 is a schematic flowchart illustrating a method for automatically inspecting a meandering trace according to an embodiment of the present application. As shown in fig. 1, the method for automatically inspecting the bent trace in the present embodiment mainly includes the following steps:
s1: and determining a signal wire to be tested by adopting a zigzag-zag wiring technology.
The signal line to be measured of this embodiment adopts zigzag-zag wiring technique, and a signal line to be measured includes a plurality of the line of walking of buckling, but the different line length of walking of buckling in the same signal line to be measured is not necessarily equal, consequently to same signal line to be measured, need find out the line of walking of buckling that length is not conform to the requirement to reduce the fine effect of PCB glass.
In this embodiment, two methods for determining a signal line to be tested using the Zig-zag wiring technique are used:
the first method is to perform fast filtering according to the keywords of the signal line to be tested to obtain the signal line to be tested. Namely, the keyword is used to quickly select the signal line to be tested, and then the filtered signal line to be tested is selected for subsequent inspection.
And the second method is to screen according to the complete network name of the signal wire to be tested to obtain the signal wire to be tested.
The first method can select a signal line to be checked from a plurality of signal lines screened out by keywords, determine the signal line to be checked as a signal line to be tested, and screen the signal line quickly. The second method is to select a signal line to be tested to be checked one by one according to the complete network name, and the screening is slow. The user can make a selection according to actual conditions.
S2: and setting a distance threshold of the bent routing in the signal wire to be tested.
Wherein the distance threshold comprises: a horizontal distance threshold or a vertical distance threshold. When the signal line to be tested is a horizontal wiring line, the distance threshold value adopts a horizontal distance threshold value; and when the signal line to be tested is a vertical wiring line, the distance threshold value is a vertical distance threshold value.
And the distance threshold of the bent routing is determined according to the requirements of users. If the user has no special requirement, the distance threshold is set to 250 mils by default according to the routing rule of Intel.
S3: and determining the length of the bent wire according to the ID information of the bent wire in the signal wire to be tested.
The length of the meandering trace includes a horizontal length of the meandering trace or a vertical length of the meandering trace. The principle here is the same as the selection of the distance threshold in step S2.
Specifically, step S3 includes the following process:
s31: and extracting the ID information of the bent routing in the signal wire to be detected.
In this embodiment, the axlSelectByName command may be used to extract the ID information of the signal line to be tested.
S32: and inquiring Cline Segment attribute information of the bent wire according to the ID information.
The Cline Segment attribute information refers to minimum trace Segment information in PCB traces. The Cline Segment attribute information includes ID information, head and tail coordinates, layer information, and the like of the PCB trace, and in this embodiment, after determining the Cline Segment attribute information according to the ID information, step S33 is executed, and the required head and tail coordinate information is determined according to the Cline Segment attribute information.
S33: and determining the head and tail coordinates of the bent routing according to the Cline Segment attribute information.
S34: and determining the routing direction of the bent routing according to the head and tail coordinates of the bent routing. Wherein, walk the line direction and include: left and right or up and down. When the bent wires in the signal wires to be tested are horizontal wires, the wire direction is left and right; when the bent wires in the signal wires to be tested are vertical wires, the wire direction is up and down.
S35: and calculating the length of the bent routing in the signal line to be detected according to the head and tail coordinates and the routing direction of the bent routing.
Step S35 includes two cases: and when the routing direction of the bent routing is left and right, calculating the horizontal length of the bent routing according to the head and tail coordinates of the bent routing. And when the routing direction of the bent routing is up and down, calculating the vertical length of the routing to be bent according to the head and tail coordinates of the bent routing.
As can be seen from fig. 1, after setting the distance threshold of the bent trace and determining the length of the bent trace in the signal line to be tested, step S4 is executed: and judging whether the length of the bent routing is less than or equal to the distance threshold value.
If the length of the folded trace is less than or equal to the distance threshold, step S5 is executed: and judging that the bent wiring of the signal wire to be tested is qualified. And ignoring the signal line to be tested with qualified bent routing, and not recording.
If the length of the folded trace is greater than the distance threshold, step S6 is executed: and judging that the bent wiring of the signal wire to be tested is unqualified, and recording the unqualified bent wiring. And aiming at unqualified bent routing wires, the bending routing wires can be recorded into a database.
Further, the method for automatically checking the folded trace in this embodiment further includes step S7: and displaying the information of unqualified bent routing. For example: the signal line name of the signal line to be tested where the bent wiring is located, the length of the bent wiring, the layer where the bent wiring is located and the head and tail coordinates of the bent wiring can be displayed.
The method for automatically inspecting the bent trace in this embodiment further includes step S8: and storing the information of the unqualified bent routing. The storage may be in the form of a text document, i.e.: and storing the information of the unqualified bent routing to a text document so as to facilitate subsequent checking.
According to the method in the embodiment, the Cadence SKILL language can be adopted for programming, so that automatic checking of the bent routing wire is realized. The Cadence SKILL language is a programming language capable of being developed secondarily, and a user can access the Cadence SKILL language and can develop own tools based on the Cadence platform.
In summary, the zigzag-zag routing is checked in an automatic manner, that is: according to the preset distance threshold value, whether the bent wiring in the signal wire to be detected is qualified or not is automatically judged, so that unqualified bent wiring in the signal wire to be detected is automatically selected, and the unqualified bent wiring is recorded, therefore, the detection efficiency can be greatly improved by the inspection mode, the PCB development period is shortened, and the influence of the glass fiber effect of the PCB is effectively reduced. The method can automatically realize the inspection of the bent wiring, thereby avoiding the error of manual inspection, having higher accuracy of the inspection of the bent wiring, avoiding the condition of missing inspection and being beneficial to improving the accuracy of the detection.
Example two
Referring to fig. 2 based on the embodiment shown in fig. 1, fig. 2 is a schematic structural diagram of a system for automatically inspecting a meandering trace according to an embodiment of the present application. As shown in fig. 2, the system for automatically inspecting the bent trace in this embodiment mainly includes: the device comprises a to-be-detected signal line determining module, a threshold setting module, a wiring length determining module, a judging module and a recording module.
The signal line to be tested determining module is used for determining a signal line to be tested adopting a Zig-zag wiring technology, and the signal line to be tested comprises a plurality of bent wires. The threshold value setting module is used for setting the distance threshold value of the bent routing in the signal wire to be tested, and the distance threshold value comprises: a horizontal distance threshold or a vertical distance threshold. The trace length determining module determines the length of the bent trace according to the ID information of the bent trace in the signal line to be tested, wherein the length of the bent trace comprises the horizontal length of the bent trace or the vertical length of the bent trace. The judging module is used for judging whether the length of the bent routing is smaller than or equal to the distance threshold value, if so, judging that the bent routing of the signal wire to be detected is qualified, and otherwise, judging that the bent routing of the signal wire to be detected is unqualified. The recording module is used for recording the bent routing judged to be unqualified by the judging module.
Further, the track length determination module includes: the device comprises an ID information extraction unit, a Cline Segment attribute information query unit, a coordinate determination unit, a routing direction determination unit and a routing length calculation unit. The ID information extraction unit is used for extracting ID information of a bent routing wire in the signal wire to be detected; the Cline Segment attribute information query unit is used for querying Cline Segment attribute information of the bent routing according to the ID information; the coordinate determination unit is used for determining head and tail coordinates of the bent routing according to Cline Segment attribute information; walk line direction and confirm the unit and be used for according to the head and the tail coordinate of walking the line of buckling, confirm the line direction of walking the line of buckling, walk the line direction and include: left and right or up and down; the routing length calculating unit is used for calculating the length of the bent routing according to the head and tail coordinates and the routing direction of the bent routing.
The system for automatically checking the bent wire further comprises a display module for displaying the information of the unqualified bent wire. The signal line name of the signal line to be tested where the bent wiring is located, the length of the bent wiring, the layer where the bent wiring is located and the head and tail coordinates of the bent wiring can be displayed. The system for automatically checking the bent trace in this embodiment further includes a storage module, configured to store information of an unqualified bent trace.
The working principle and the working method of the system for automatically checking the meandering trace according to this embodiment have been described in detail in the embodiments shown in fig. 1 and fig. 2, and are not described herein again.
In summary, the present embodiment provides a system for automatically inspecting a bent trace, which utilizes the tool for automatically inspecting a bent trace to replace a manual inspection in the prior art, so as to greatly improve the inspection accuracy and the inspection efficiency of the bent trace, thereby selecting an unqualified signal line to be tested, and further effectively reducing the glass fiber effect of the PCB.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A method of automatically inspecting a meandering trace, the method comprising:
determining a signal wire to be tested by adopting a zigzag-zag wiring technology, wherein the signal wire to be tested comprises a plurality of bent wires;
setting a distance threshold value of a bent routing wire in a signal wire to be tested, wherein the distance threshold value comprises: a horizontal distance threshold or a vertical distance threshold;
determining the length of the bent wire according to the ID information of the bent wire in the signal wire to be tested, wherein the length of the bent wire comprises the horizontal length of the bent wire or the vertical length of the bent wire;
judging whether the length of the bent routing is smaller than or equal to the distance threshold value;
if yes, judging that the bent routing of the signal wire to be tested is qualified;
otherwise, judging that the bent wiring of the signal wire to be tested is unqualified, and recording the unqualified bent wiring.
2. The method for automatically inspecting a meandering trace according to claim 1, wherein the method for determining a signal line to be tested using Zig-zag routing technology comprises:
performing rapid filtering according to keywords of the signal line to be detected to obtain the signal line to be detected; alternatively, the first and second electrodes may be,
and screening according to the complete network name of the signal wire to be tested to obtain the signal wire to be tested.
3. The method for automatically inspecting meandering traces according to claim 1, wherein the determining the length of the meandering trace in the signal line to be tested according to the ID information of the signal line to be tested comprises:
extracting ID information of a bent routing wire in the signal wire to be detected;
inquiring Cline Segment attribute information of the bent routing according to the ID information;
determining the head and tail coordinates of the bent routing according to the Cline Segment attribute information;
according to the head and tail coordinates of the bent routing, determining the routing direction of the bent routing, wherein the routing direction comprises: left and right or up and down;
and calculating the length of the bent routing according to the head and tail coordinates and the routing direction of the bent routing.
4. The method for automatically inspecting the folded trace according to any one of claims 1-3, wherein after determining that the folded trace of the signal line to be tested is not qualified and recording the unqualified folded trace, the method further comprises:
and displaying the information of the unqualified bent routing.
5. The method for automatically inspecting a meandering trace according to claim 4, wherein after displaying the information of the faulty meandering trace, the method further comprises:
and storing the information of the unqualified bent routing.
6. A system for automatically inspecting a buckled trace, the system comprising:
the device comprises a to-be-tested signal line determining module, a signal processing module and a signal processing module, wherein the to-be-tested signal line determining module is used for determining a to-be-tested signal line adopting a Zig-zag wiring technology, and the to-be-tested signal line comprises a plurality of bent wires;
the threshold value setting module is used for setting a distance threshold value of a bent routing wire in a signal wire to be tested, and the distance threshold value comprises: a horizontal distance threshold or a vertical distance threshold;
the trace length determining module is used for determining the length of the bent trace according to the ID information of the bent trace in the signal line to be detected, wherein the length of the bent trace comprises the horizontal length of the bent trace or the vertical length of the bent trace;
the judging module is used for judging whether the length of the bent routing is smaller than or equal to the distance threshold, if so, judging that the bent routing of the signal wire to be detected is qualified, and otherwise, judging that the bent routing of the signal wire to be detected is unqualified;
and the recording module is used for recording the bent routing judged to be unqualified by the judging module.
7. The system for automatically inspecting a meandering trace according to claim 6, wherein the trace length determination module comprises:
the ID information extraction unit is used for extracting the ID information of the bent routing in the signal wire to be detected;
a Cline Segment attribute information query unit, configured to query Cline Segment attribute information of the bent trace according to the ID information;
the coordinate determination unit is used for determining the head and tail coordinates of the bent routing according to the Cline Segment attribute information;
the routing direction determining unit is used for determining the routing direction of the bent routing according to the head and tail coordinates of the bent routing, and the routing direction comprises: left and right or up and down;
and the routing length calculating unit is used for calculating the length of the bent routing according to the head and tail coordinates and the routing direction of the bent routing.
8. The system for automatically inspecting meandering traces of claim 6 or 7, further comprising a display module for displaying information of the faulty meandering trace.
9. The system for automatically inspecting a meandering trace of claim 8, further comprising a storage module for storing information about the faulty meandering trace.
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| CN115081389B (en) * | 2022-06-17 | 2024-01-23 | 苏州浪潮智能科技有限公司 | Printed circuit board wiring inspection method, device, equipment and storage medium |
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