JPH10198708A - Drawing verification system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically verify whether optional data, such as ambiguous data, are correctly reflected in production of a drawing, by judging whether the data showing the drawing are adaptive to data that show a prescribed condition. SOLUTION: A two-dimensional matrix table consists of the attributes of the frequency and impedances. In a rule book, the rules such as 'to draw in the shortest distance' and 'to shield' are defined to the pointers '1' and '2' respectively which are decided based on the two-dimensional matrix table. A rule is automatically decided based on the attribute of the network to be inputted and changed and outputted to be referred to for the check of a design rule. Thus, it's possible to automatically verify whether or not the items designated by a circuit designer based on his experiences and know-how are accurately reflected in a layout drawing for a printed circuit board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing verification system, and more particularly, to a computer supported by a computer capable of generating an arbitrary drawing such as a circuit diagram, a printed circuit board layout diagram, or a map in electronic and electrical design. More particularly, the present invention relates to a drawing verification system suitable for use in a CAD system, and more particularly to a drawing verification system capable of verifying whether or not a drawing generated by the CAD system is properly generated according to predetermined conditions.

[0002] Here, "generation" of a drawing means a process including creation and editing of a drawing.

[0003]

2. Description of the Related Art In a conventional CAD system, when a printed circuit board layout diagram is created from a circuit diagram, a circuit design person in charge of a function or performance depends on a layout method in advance. The layout was specified by breadboard experiments and experience.

[0004] Since most of the items designated by the person in charge of circuit design are vague information that is difficult to quantify, in order to reflect such items in a printed circuit board layout diagram, for example, as shown in FIG. The items specified by the person in charge of circuit design should be noted on the circuit diagram by typing or handwriting, or stored as comments on the circuit diagram data to create a printed circuit board layout diagram. At that time, a method has been adopted that allows a layout designer to refer to them.

However, in the above-described conventional method, as shown in FIG. 1, a circuit designer is in charge of writing in a circuit diagram as a cautionary point by typing or handwriting, or as a comment on circuit diagram data. It is not possible to automatically verify whether the items specified by the operator are accurately reflected in the printed circuit board layout drawing. To perform such verification, for example, a printed circuit board layout created from a circuit diagram There is a problem that the user must manually check the diagram and the cautionary notes that are typed or handwritten on the circuit diagram.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide the above-described experience and know-how of a person in charge of circuit design. It is possible to automatically verify whether or not a drawing has been generated by accurately reflecting arbitrary data such as ambiguous data such as an item designated by the person in charge of circuit design, without manual intervention. Like so
An object of the present invention is to provide a drawing verification system capable of creating a high-quality drawing in a short time.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a drawing verification system for verifying whether or not a drawing is properly generated according to a predetermined condition. Wherein the first storage means for storing data indicating a drawing, the second storage means for storing data indicating a predetermined condition, and the data indicating a drawing stored in the first storage means are stored in the first storage means. And determining means for determining whether or not the data indicates predetermined conditions stored in the second storage means.

[0008] Here, "drawings" include various drawings such as maps, and "generation" of drawings means processing including creation and editing of drawings. "Conditions" means any items including ambiguous items that are difficult to quantify.

The "first storage means" and the "second storage means" can be respectively constructed as databases, and may be physically stored in a single magnetic disk. .

[0010] For example, as in the second aspect of the present invention, the second storage means may store two or more dimensions according to the attribute of data indicating a drawing stored in the first storage means. And a rule book storing predetermined conditions respectively set corresponding to each cell of the matrix table, and the determination unit stores the drawing stored in the first storage unit. The cell of the matrix table of the second storage means is determined based on the attribute of the data shown, and the data showing the drawing stored in the first storage means is stored in the rule book corresponding to the determined cell. It may be determined whether or not a predetermined condition stored in is stored.

Here, the "matrix table having two or more dimensions in accordance with the attribute of the data indicating the drawing" refers to a cell which is a constituent element of the matrix specified in accordance with the attribute of the data indicating the drawing. Is a kind of table,
The “rule book” is a storage area for storing predetermined conditions stored corresponding to each cell of the matrix.

According to a third aspect of the present invention, there is provided a drawing verification system for verifying whether or not a printed circuit board layout diagram is properly generated from a circuit diagram according to predetermined conditions. A first storage unit for storing data indicating predetermined conditions, a second storage unit for storing data indicating predetermined conditions when a printed circuit board layout diagram is generated from a circuit diagram, and the first storage unit. Determining means for determining whether or not the data indicating the printed circuit board layout diagram matches the data indicating the predetermined condition stored in the second storage means.

According to a third aspect of the present invention, a printed circuit board layout diagram generated from a circuit diagram is generated so as to conform to predetermined conditions when a printed circuit board layout diagram is generated from a circuit diagram. It is determined whether or not it has been performed.

Here, the "predetermined conditions" mean any items including items specified by the person in charge of circuit design based on the experience and know-how of the person in charge of circuit design. Further, similarly to the first aspect of the present invention, the "first storage means" and the "second storage means" can be constructed as databases, respectively, and are physically single. May be stored in a magnetic disk.

Here, for example, as in the invention described in claim 4, the second storage means stores the data in accordance with the attribute of the data indicating the printed circuit board layout diagram stored in the first storage means. A matrix table having at least dimensions, and a rule book storing predetermined conditions set corresponding to each cell of the matrix table, wherein the determination unit stores the first storage unit in the first storage unit. A cell of the matrix table of the second storage means is determined based on the attribute of the data indicating the stored printed circuit board layout drawing, and the data indicating the printed circuit board layout drawing stored in the first storage means is: It may be determined whether or not a predetermined condition stored in the rule book corresponding to the determined cell is satisfied.

Here, the "matrix table having two or more dimensions according to the attributes of the data indicating the printed circuit board layout diagram" is a configuration that forms a matrix according to the attributes of the data indicating the printed circuit board layout diagram. This is a type of table in which cells as elements are specified, and a “rule book” is a storage area for storing predetermined conditions stored corresponding to each cell of the matrix.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a drawing verification system according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram of a CAD system provided with a drawing verification system according to the present invention. In this CAD system, a circuit diagram and a printed circuit board layout diagram can be generated.

This CAD system has a central processing unit (C
The PU 10 controls the overall operation. The CPU 10 has a read-only memory (ROM) 1 via a bus line, which stores a program to be executed by the CPU 10 for performing various processes described below.
2 and a random area as a working area when the CPU 10 executes a program stored in the ROM 12.
Access memory (RAM) 14 and, as will be described later, logical information and graphic information indicating a circuit diagram, logical information and graphic information indicating a printed circuit board layout diagram, an external storage device storing a two-dimensional matrix table and a rule book as a database The magnetic disk 16 and the CP
A first graphics display device 18 having a display for displaying a figure showing a circuit diagram under the control of U10
A second graphics display device 20 having a display for displaying a figure showing a printed circuit board layout diagram based on the control of the CPU 10, and a display content of the first graphics display device 18 and the second graphics display device 20. A keyboard 22 and a mouse 24 as operators for performing selection and editing instructions are connected.

As described above, the database stored on the magnetic disk 16 includes a database A1 for storing logical information indicating a connection relationship in a circuit diagram displayed by the first graphics display device 18, and a first graphic A2 that stores graphic information indicating the shape of a circuit diagram displayed by the graphics display device 18 and a database B1 that stores logical information indicating connection relationships in a printed circuit board layout diagram displayed by the second graphics display device 20 And a database B2 for storing graphic information indicating the graphic shape of the printed circuit board layout diagram displayed by the second graphics display device 18.

In other words, the first graphics display device 18 displays a circuit diagram based on the logical information stored in the database A1 and the graphic information stored in the database A2, and the second graphics display device 20 Displays a printed circuit board layout diagram based on the logical information stored in the database B1 and the graphic information stored in the database B2. That is, in this embodiment, the CP
Based on the control of U10, the first graphics display device 18 is used as a circuit diagram graphic editing device (circuit diagram graphic editor), and the second graphics display device 2 is used.
0 is used as a figure editing device for a printed circuit board layout diagram (a graphic editor for printed circuit board layout).

The logical information stored in the database A1 and the graphic information stored in the database A2 indicate that one object has a unique identification number (ID), and that the object has a unique ID. It has a structure in which logical information and graphic information are related.

In the logical information stored in the database B1 and the graphic information stored in the database A2, as with the logical information stored in the database A1 and the graphic information stored in the database A2, one object Have a unique identification number (ID), and have a structure in which the logical information and the graphic information of the object are related by the unique ID of the object.

The main objects are an object (part) representing a part of the electronic circuit, and a part ID.
(Part ID), an object (net) representing a connection relationship between parts, a net ID (net ID), and the like.
Further, each object can hold a plurality of data indicating attributes.

Next, an example of the processing executed by the CAD system will be described with reference to the outline of the processing flow in the CAD system shown in FIG. In FIG. 3, the processes performed by the graphic editor for circuit diagram and the processes performed by the graphic editor for printed circuit board layout are conventionally known processes, and thus detailed description is omitted.

First, when the operator turns on the power and starts the CAD system, the CPU 10 starts the first graphics display device 18 (a graphic editor for a circuit diagram) and executes a process 302 by the graphic editor for a circuit diagram. I do.

In the process 302 by the circuit diagram graphic editor, first, desired circuit diagram data (logic information and graphic information of the circuit diagram) stored in the databases A1 and A2 from the magnetic disk 16 is read into the RAM 14, First graphics display device 1
The content, that is, the circuit diagram, is displayed in the circuit design graphic editor window 8. Here, the above-described desired circuit diagram data is referred to as “fileCIR”.

Next, data indicating the electrical characteristics (net attribute) of the net is input, and “fileCIR” is updated and stored on the magnetic disk 16. Specifically, when the keyboard 22 or the mouse 24 is operated to instruct the input of the net attribute, as shown in FIG. 4, a net attribute input dialog is opened on a graphic editor window for circuit design, and input of desired data is performed. Becomes possible. In the example shown in FIG. 4, "net" is used as the net attribute.
A state in which “20K to 200K” is input as the frequency of “A” is shown.

When the "fileCIR" is updated and stored on the magnetic disk 16, based on the updated circuit diagram data "fileCIR", the printed circuit board layout diagram data (logic of the printed circuit board layout diagram) corresponding to the circuit diagram is displayed. Information and graphic information), which are stored in the database B1 and the database B2 of the magnetic disk 16.
To be stored. Here, the printed circuit board layout diagram data corresponding to the above-described circuit diagram is referred to as “filePCB”.

Then, the CPU 10 activates the second graphics display device 20 (graphics editor for printed circuit board layout) and executes the processing 304 by the graphic editor for printed circuit board layout.

As the processing 304 by the graphic editor for printed circuit board layout, first, the printed circuit board layout drawing data “fil” stored in the database B1 and the database B2 from the magnetic disk 16 are stored.
"ePCB" is read into the RAM 14, and its contents, that is, a printed circuit board layout diagram is displayed in the graphic editor window for the board layout of the second graphics display device 20.

Next, graphic information corresponding to the net (hereinafter referred to as "graphic information")
This is referred to as “wiring layout data”. ) Is input and changed, and “filePCB” is updated and stored in the magnetic disk 16. More specifically, the input or change of the wiring layout data is instructed by the keyboard 22 or the mouse 24.

Then, the attribute of the net which has become symmetrical in the above input and change processing is detected, and the processing 306 executed by the drawing verification system according to the present invention is performed.

The DRC (Design Rule Chec) is referred to with reference to a rule obtained in a process 306 executed by the drawing verification system according to the present invention described later.
k: design rule check). This DRC
If the result of the execution of the DRC is bad, the wiring change processing is performed to input and change the wiring layout data, and if the result of the DRC is good, the wiring layout data is corrected and printed. The board layout diagram data “filePCB” is updated and stored on the magnetic disk 16.

Next, the process 306 executed by the drawing verification system according to the present invention will be described in detail.

Here, in the drawing verification system according to the present invention, a two-dimensional matrix table composed of two attributes given to the net and notes (rules) to be observed when designing the printed circuit board are described. The defined rule book is provided as a database on the magnetic disk 16. Here, the rules defined in the rule book are, for example, items specified by the circuit designer based on the experience and know-how of the circuit designer.

A pointer for designating a rule defined in a rule book is appropriately provided between each cell of the two-dimensional matrix table and a certain cell and another cell.
Given two attribute values, a pointer to the rule book at the intersection of the two attribute values on the two-dimensional matrix table is determined, and the rule specified by the pointer on the rule book is automatically set. It is determined. Further, a pointer is appropriately provided at a bisecting point of a line segment connecting one pointer and another pointer.

FIG. 5 shows an example of a two-dimensional matrix table and a rule book. In the example illustrated in FIG. 5, the two-dimensional matrix table includes two attributes of frequency and impedance. The rule book corresponds to each pointer determined by the two-dimensional matrix table, for example, For "pointer 1", "pull in the shortest time", for "pointer 2", "shield", for "pointer 3", "wire 45 degrees", and for "pointer 4", "lowest". Each rule is defined as follows.

In the drawing verification system according to the present invention, a rule is automatically set on the basis of the attribute of the net for which the input and change processing is detected in the processing 304 by the graphic editor for printed circuit board layout. And the determined rule is D
It is output for reference in the processing of RC, and by referring to the determined rule when executing DRC,
The above-mentioned rule, that is, whether or not a printed circuit board layout diagram has been accurately generated based on the experience and know-how of the circuit designer and accurately reflects the items designated by the circuit designer, without manual intervention. This makes it possible to create a high-quality printed circuit board layout diagram more intuitively and in a short time.

More specifically, for example, as shown in FIG. 5, two attributes of frequency and impedance are given to the net “netA”, and the value of each attribute is “frequency = 3”. "And" impedance = 4 ", and two attributes of frequency and impedance are given to the net" netB ", and the values of the attributes are" frequency = 2 "and" impedance = 2 ", respectively. ".

Therefore, in this case, the net "net
Regarding “A”, “Pointer 1” is determined from the intersection of “Frequency = 3” and “Impedance = 4” on the two-dimensional matrix table, and “Pointer 1” is a rule to be applied to the net “netA”. The rule "pull in the shortest time" in the rule book specified by "" is automatically determined. Further, regarding the net “netB”, “frequency =
“Pointer 3” is determined from the intersection of “impedance = 2” and “impedance = 2”. As a rule to be applied to the net “netB”, the rule “45-degree wiring” in the rule book specified by “pointer 3” "Do" is automatically determined. Further, on the two-dimensional matrix table, the bisecting of the line segment L connecting the “pointer 1” determined for the net “netA” and the “pointer 3” determined for the net “netB” The “pointer 4” at the point is determined and the net “net
As a rule to be applied to the relationship between “A” and the net “netB”, the rule “at least 3 mm away” in the rule book specified by “pointer 4” is automatically determined.

Here, as described above, the net "net
A rule for “A” is determined, rule “45 degrees wiring” for net “netB” is determined, and rule for the relationship between net “netA” and net “netB” is “at least 3 mm away”. Is determined, the rule is output for reference in DRC processing, and the DRC is executed with reference to the rule.

If there is an error in the input / change processing relating to the wiring layout data of the net "netA", an error is displayed on this DRC (FIG. 6).
This indicates that there was an error in the input / change processing regarding the wiring layout data of the net “netA”, and the wiring change processing is performed, and the input / change processing of the wiring layout data of the net “netA” is performed again. . In the example shown in FIG. 6, the rule “pull in the shortest time” for the net “netA” and the rule “minimum 3 m” for the relationship between the net “netA” and the net “netB”
Because it violates both of "move away", an error mark is displayed in two places in the graphic editor window for board layout, and "pull at the shortest distance" indicating "pull at the shortest" . "And" Please leave a clearance of 3 mm or more. "Are displayed as detailed DRC error information.

Also, when there is an error in the input and change processing regarding the wiring layout data of the net “netB”, similarly to the case where there is an error in the input and change processing regarding the wiring layout data of the net “netA”, D
An error is displayed on the RC (see FIG. 7), indicating that there is an error in the input and change processing regarding the wiring layout data of the net “netB”, and the wiring change processing is performed to check the wiring layout data of the net “netB”. The input and change processing will be performed again. In the example shown in FIG. 7, the rule “45” for the net “netB” is used.
Wire "and net" netA "and net" net
B, which violates both the rule "at least 3 mm away" and the mark indicating an error is displayed at two places in the board layout graphic editor window, and the "45 degree wiring" The message "Please wire 45 degrees" and "Please leave a clearance of 3 mm or more."

As described above, it is possible to automatically verify and display whether or not a printed circuit board layout diagram is generated by accurately reflecting the above-described rules, so that the layout designer can be more intuitive. A high-quality printed circuit board layout diagram can be created in a short time.

Note that, in the above-described embodiment, 2
The pointer is determined by referring to the dimension matrix table, but is not limited thereto.
A rule book pointer may be specified by a matrix table of three or more dimensions by giving attributes of more than types. At this time, it is preferable that the number of types of attributes and the number of dimensions of the matrix match.

Further, in the above-described embodiment, the case where the present invention is used for verifying a drawing when designing a printed circuit board layout diagram from a circuit diagram has been described. However, the present invention is not limited to this. Of course, it may be used for verification of other drawings such as a map for completing a land readjustment project when conducting a business. For example, when the present invention is used for verification of a land readjustment project completion schedule map when conducting a land readjustment project, the type of building and the distance between the buildings are given as attributes, and a predetermined value such as a public bath is required by law. What is necessary is just to make it memorize | store in the rule book as a rule about the matter which needs to open a distance.

[0048]

Since the present invention is configured as described above, any arbitrary data such as ambiguous data such as items designated by the circuit designer based on the experience and know-how of the circuit designer is provided. An excellent effect that it is possible to automatically verify whether or not a drawing has been generated by accurately reflecting data, without human intervention, and to create a high-quality drawing in a short time. Is played.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of a circuit diagram in which items designated by a person in charge of circuit design are typed as cautions;

FIG. 2 is a CAD equipped with a drawing verification system according to the present invention.
It is a block configuration diagram of a system.

FIG. 3 is a flowchart showing an outline of a processing flow in the CAD system.

FIG. 4 is an explanatory diagram showing a state where a net attribute input dialog is opened on a graphic editor window for circuit design.

FIG. 5 is an explanatory diagram showing an example of a two-dimensional matrix table and a rule book.

FIG. 6 is an explanatory diagram showing an example of error display in DRC.

FIG. 7 is an explanatory diagram showing an example of error display in DRC.

[Explanation of symbols]

10 CPU 12 ROM 14 RAM 16 Magnetic Disk 18 First Graphics Display Device 20 Second Graphics Display Device 22 Keyboard 24 Mouse 302 Processing by Graphic Editor for Circuit Diagram 304 Processing by Graphic Editor for Printed Circuit Board Layout 306 Drawing Verification by the Present Invention Processing performed by the system

 ────────────────────────────────────────────────── ─── Continued from the front page (72) Inventor Yasutaka Ito 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation

Claims (4)

[Claims] 1. A drawing verification system for verifying whether a drawing is properly generated in accordance with a predetermined condition, a first storage means for storing data indicating a drawing, and storing data indicating a predetermined condition. A second storage unit, and data indicating a drawing stored in the first storage unit,
A determination unit for determining whether or not data indicating a predetermined condition stored in the second storage unit is satisfied. 2. The drawing verification system according to claim 1, wherein said second storage means has two or more dimensions in accordance with an attribute of data indicating a drawing stored in said first storage means. A matrix table and a rule book storing predetermined conditions respectively set corresponding to each cell of the matrix table, wherein the determination unit stores data indicating a drawing stored in the first storage unit. The cell of the matrix table of the second storage means is determined based on the attribute of the second storage means, and the data indicating the drawing stored in the first storage means is stored in the rule book corresponding to the determined cell. A drawing verification system for determining whether or not the predetermined condition is satisfied. 3. A drawing verification system for verifying whether or not a printed circuit board layout diagram is properly generated from a circuit diagram according to predetermined conditions, wherein a data indicating the printed circuit board layout diagram is stored.
Storage means for storing data indicating predetermined conditions when generating a printed circuit board layout diagram from a circuit diagram; and data indicating a printed circuit board layout chart stored in the first storage means. Determining means for determining whether or not the data indicates predetermined conditions stored in the second storage means. 4. The drawing verification system according to claim 3, wherein said second storage means has two or more dimensions according to an attribute of data indicating a printed circuit board layout diagram stored in said first storage means. A matrix table having dimensions and a rule book storing predetermined conditions set corresponding to each cell of the matrix table, wherein the determination unit includes a print unit stored in the first storage unit. Based on the attributes of the data showing the board layout diagram,
Determining cells of a matrix table of the second storage means;
Determining whether or not the data indicating the printed circuit board layout diagram stored in the first storage unit meets predetermined conditions stored in the rule book corresponding to the determined cell. Drawing verification system.