CN102955868A - Wiring check system and method - Google Patents

Abstract

The invention provides a wiring inspection system, which is applied to a computing device. The system provides a user interface for the user to set the standard distance between the wires in the PCB layout file and the power through hole, and displays the names of all the power lines in the PCB layout file in the first display area of the user interface. The system also receives the power line selected by the user, and finds out all the power through holes that the power line passes through from the PCB wiring diagram file, and finds out the wire segment whose distance from each power through hole is smaller than the standard distance. The invention also provides a wiring inspection method.

Description

Wiring inspection system and method

technical field

The invention relates to a circuit inspection system and method, in particular to a wiring inspection system and method.

Background technique

During the wiring process of the printed circuit board, the instantaneous voltage switching (dv/dt) of the power line drawn from the power regulator (volatage regulator), and the transient current generated when passing through the through hole, cause large interference to the adjacent signal line The coupled noise seriously affects the signal integrity. In order to prevent coupling interference near the power through hole, a certain distance should be kept between the signal line and the power through hole. At present, the inspection between the signal line and the power through hole relies on manually selecting the power line one by one in the wiring diagram to determine the power through hole to obtain the distance between the power through hole and the surrounding signal lines. Due to the huge number of wiring on the circuit board, manual operation is not only time-consuming and laborious, but also prone to omissions and errors due to the negligence of designers.

Contents of the invention

In view of the above, it is necessary to propose a wiring inspection system and method, which can quickly and accurately screen out the wires in the wiring diagram that do not meet the distance from the power supply through hole, and prevent the power line passing through the power supply through hole from causing damage to nearby wires. Coupling interference.

A wiring inspection system, the system includes: a reading module, used to read a printed circuit board PCB wiring diagram file from a memory of a computing device; a setting module, used to receive a PCB inputted by a user on a user interface provided by the system The standard distance between the wires in the wiring diagram file and the power supply through hole; the display module is used to display the names of all power lines in the PCB wiring diagram file in the first display area provided by the user interface for the user to select a power line; and check The module is used to find out all the power through-holes that the power line passes through from the PCB wiring diagram file, and find out the wire segment whose distance from each power through-hole is smaller than the standard distance.

A wiring inspection method, the method comprising: (A) reading a PCB wiring diagram file of a printed circuit board from a memory of a computing device; The standard distance of the hole; (C) display the names of all power lines in the PCB wiring diagram file in the first display area provided by the user interface for the user to select a power line; and (D) find out the power line from the PCB wiring diagram file All the power supply through-holes that the power supply wires pass through, and find out the wire segment whose distance from each power supply through-hole is less than the standard distance.

Compared with the prior art, the wiring inspection system and method provided by the present invention can quickly and accurately screen out the wires whose distance from the power supply through hole in the wiring diagram does not meet the requirements, and prevent the wires near the power line pair passing through the power supply through hole. Wires cause coupling interference.

Description of drawings

FIG. 1 is an application environment diagram of a preferred embodiment of the wiring inspection system of the present invention.

Fig. 2 is a functional block diagram of a preferred embodiment of the wiring inspection system of the present invention.

Fig. 3 is a flowchart of a preferred embodiment of the wiring inspection method of the present invention.

FIG. 4(I) is a schematic diagram of finding a wire segment whose distance from the power through hole is less than a preset standard distance.

Fig. 4 (II) locates the power supply through hole (or wire line segment) selected by the user in the wiring diagram file and the wire line segment (or power supply through hole) whose distance from the power supply through hole (or wire line segment) is less than the standard distance .

Description of main component symbols

computing device 100 Wiring inspection system 10 Processor 20 memory 30 display 40 PCB layout file 50 read module 11 set module 12 select module 13 check module 14

display module 15 Positioning module 16

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

Referring to FIG. 1 , it is an application environment diagram of a preferred embodiment of the wiring inspection system 10 of the present invention. The wiring inspection system 10 is applied to a computing device 100 . The computing device 100 also includes a processor 20 , a memory 30 , a display 40 and a printed circuit board (printed circuit board, PCB) wiring diagram file 50 . The wiring inspection system 10 is used to check the wires in the PCB wiring diagram file 50 whose distance from the power supply hole does not meet the wiring requirements, so as to prevent the power wire passing through the power supply hole from causing coupling interference to nearby wires. A PCB generally consists of a multi-layer circuit board, such as a signal layer, a power layer, and a ground layer. The through hole refers to the holes on different layers of the PCB, and the power through hole refers to the hole through which the power line passes. The electric wires include all power lines, signal lines, ground lines and other types of wiring except the power line passing through the power through hole. The power line refers to the wires that transmit current on the PCB, and the signal line refers to the wires that transmit signals on the PCB.

The memory 30 is used for storing the PCB wiring diagram file 50 and the programming code of the wiring inspection system 10 . The memory 30 can be a storage device such as a smart media card (smart media card), a secure digital card (secure digital card), or a flash memory card (flash card).

The processor 20 is used to execute the programmed codes of the wiring inspection system 10 to provide the above functions of the wiring inspection system 10 .

The display 40 is used to display the PCB wiring diagram file 50, and display the user interface provided by the wiring inspection system 10 for the user to select the power line to be inspected from the PCB wiring diagram file 50, set inspection parameters, and display inspection results.

Referring to FIG. 2 , it is a functional block diagram of a preferred embodiment of the wiring inspection system 10 of the present invention. The wiring inspection system 10 includes a reading module 11 , a setting module 12 , a selection module 13 , a checking module 14 , a display module 15 and a positioning module 16 . The functions of the modules 11 to 16 will be described below with reference to FIG. 3 .

Referring to FIG. 3 , it is a flow chart of a preferred embodiment of the wiring inspection method of the present invention. According to different requirements, the order of the steps in the flowchart can be changed, and some steps can be omitted, such as steps S309 and S311.

Step S301 , the reading module 11 reads the PCB layout file 50 from the memory 30 .

Step S303 , the setting module 12 receives the standard distance d between the wire and the power through hole in the PCB wiring diagram file 50 input by the user on the user interface provided by the wiring inspection system 10 , for example, d=40mil. 1 mil equals one thousandth of an inch. As mentioned above, the electric wires include all power lines, signal lines, ground lines and other types of wiring except the power line passing through the power supply through hole. The power line refers to the wires that transmit current on the PCB, and the signal line refers to the wires that transmit signals on the PCB.

In step S305, the display module 15 displays the names of all the power lines in the PCB wiring diagram file 50 in the first display area provided by the user interface, and the selection module 13 receives a power line selected by the user. Users can also select multiple power cords at once.

In step S307, the inspection module 14 finds out from the PCB wiring diagram file 50 all the power through holes that the power line passes through, and finds out the wire segment whose distance to each power through hole is smaller than the standard distance. For example, as shown in Figure 4 (I), the circular ring A1 represents a power supply through hole, with the center point of the power supply through hole as the center, and a standard distance (such as d=40mil) as the radius to generate a circle (in Figure 4 (I) Indicated by a virtual line), the distance between all the signal line segments falling in the circle and the power through hole in the PCB layout file 50 is less than the standard distance. The circle generated here is not limited to the circuit board level where the power supply through hole is located, and can also be a plane perpendicular to the circuit board level where the power supply through hole is located, so as to find out the connection between the wires passing through different circuit board levels and the power supply. The distances of the through holes are smaller than the standard distance of the electric wires. A wire on a PCB, such as a signal wire, may consist of multiple wire segments, and different wire segments on the same wire may have different distances from the same power through hole.

In step S309, the display module 15 displays the found coordinates of each through-hole and the name of the wire segment in the second area provided by the user interface.

Step S311, the selection module 13 receives a power through hole (or a wire segment) selected by the user from the second area, and the positioning module 16 jumps to the PCB wiring diagram file 50 to locate the selected power through hole (or wire segment) And the wire segment (or power supply through hole) whose distance from the through hole (or wire segment) is less than the standard distance, so as to prompt the user to modify the wiring design of the wire segment. For example, assuming that the user selects a signal line segment L1 from the second area, as shown in FIG. The distance of L1 is smaller than the standard distance of the power through hole A5.

In step S313, the checking module 14 checks whether there are power lines not selected in the PCB wiring diagram file 50. If there are other power lines that have not been selected, return to step S305, and if all power lines have been selected, the process ends.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A wiring inspection system, characterized in that the system comprises: The reading module is used to read the printed circuit board PCB wiring diagram file from the memory of the computing device; The setting module is used to receive the standard distance between the wire and the power through hole in the PCB wiring diagram file input by the user on the user interface provided by the system; A display module, configured to display the names of all power lines in the PCB wiring diagram file in the first display area provided by the user interface for the user to select a power line; and The checking module is used to find out from the PCB wiring diagram file all the power through-holes that the selected power line passes through, and find out the wire segments whose distance to each power through-hole is smaller than the standard distance. 2 . The wiring inspection system according to claim 1 , wherein the display module is further configured to display the coordinates of each found through hole and the name of the wire segment in the second area provided by the user interface. 3 . 3. The wiring inspection system according to claim 2, further comprising a selection module, configured to receive a through hole/a wire segment selected by the user from the second area; and The positioning module is used to jump to the PCB wiring diagram file to locate the selected power through hole/wire segment and the wire segment/power through hole whose distance from the power through hole/wire segment is less than the standard distance, to prompt the user Modify the routing design for this wire segment. 4. The wiring inspection system according to claim 1, wherein the power through hole is a hole through which a power line on the PCB passes. 5 . The wiring inspection system according to claim 1 , wherein the wires include all power wires, signal wires and ground wires except the power wires passing through the power through hole. 5 . 6. A wiring inspection method, characterized in that the method comprises: Reading step: reading the PCB wiring diagram file of the printed circuit board from the memory of the computing device; Setting step: receiving the standard distance between the wire and the power through hole in the PCB wiring diagram file input by the user on a user interface; Displaying steps: displaying the names of all power lines in the PCB wiring diagram file in the first display area provided by the user interface for the user to select a power line; and Checking steps: find out from the PCB wiring diagram file all the power through-holes that the selected power line passes through, and find out the wire segments whose distance from each power through-hole is less than the standard distance. 7. The wiring inspection method according to claim 6, wherein the display module is further configured to display the coordinates of each found through-hole and the name of the wire segment in the second area provided by the user interface. 8. wiring inspection method as claimed in claim 7, is characterized in that, this method also comprises: Selecting step: receiving a through hole/a wire segment selected by the user from the second area; and Locating step: Jump to the PCB wiring diagram file to locate the selected power through hole/wire segment and the wire segment/power through hole whose distance from the power through hole/wire segment is less than the standard distance, to prompt the user to modify the Routing design of wire segments. 9. The wiring inspection method according to claim 6, wherein the power through hole is a hole through which a power line on the PCB passes. 10 . The wiring inspection method according to claim 6 , wherein the wires include all power wires, signal wires and ground wires except the power wires passing through the power through hole. 11 .

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