JPH0497492A - Coordinate calculating device for printed circuit board tester - Google Patents

Abstract

PURPOSE:To calculate a circular electrode coordinate for a tester easily by calculating the circular electrode coordinate for the tester from the data of a graphic element constituting the contour lines of a wiring pattern on a printed circuit board. CONSTITUTION:A pattern graphic changing part 3 for changing into the contour data of a fixed direction showing each wiring pattern from inputted pattern data and a circular electrode extracting part 4 for calculating the circular electrode coordinate for the tester from changed data are provided. And, a data changing part 5 for the tester for changing the calculated circular electrode coordinate for the tester into a format which the tester can read out, and a data output device 6 for outputting the prepared coordinate for the tester by a magnetic tape and the like are provided. And the circular electrode coordinate for the tester is calculated from the data of the graphic element constituting the contour lines of the wiring pattern on the printed board. That is, with regard to the coordinate for the printed circuit board tester, without using an exclusive CAD, data which is not added attribute information to the circle electrode for the tester are considered as an input. Thus, it is possible to output the coordinate for the tester automatically.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a coordinate calculation device for a printed circuit board tester,
In particular, for example, general mechanical drawing CAD (Computer
The present invention relates to a coordinate calculation device for a printed circuit board tester that automatically interprets a figure from data representing a wiring pattern of a printed circuit board created using an aided design system or the like to calculate circular electrode coordinates for the tester.

[Conventional technology]

Conventionally, when designing printed circuit board wiring patterns, a computer-based CAD system dedicated to printed circuit boards has been considered, and the printed circuit board wiring pattern data created by this system has attribute data unique to the system added. By using the unique attribute data, the circular electrode coordinates for the tester were automatically calculated.

[Problem to be solved by the invention]

However, in the conventional printed circuit board dedicated CAD system described above, the system must design the wiring pattern of the printed circuit board from the beginning and create data with specific attribute data added. Data of only the graphical elements (line segments, arcs) of the printed circuit board wiring pattern created with a mechanical drafting CAD system, or
The problem is that the circular electrode coordinates for the tester cannot be automatically calculated from the data of only graphical elements (line segments, arcs) inputted as graphical data into a computer using a scanner using a hand-drawn outline drawing of a pattern. There was a point.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus that calculates the coordinates of a circular electrode for a tester from data of only graphical elements representing a wiring pattern of a printed circuit board.

[Means to solve the problem]

The coordinate calculation device for a printed circuit board tester of the present invention is a tester for electrically inspecting a printed circuit board, or a device for calculating the center coordinates of a circular electrode on a printed circuit board for crimping a test terminal, and includes a wiring pattern on a printed circuit board. (hereinafter referred to as pattern data, and the graphic elements that constitute the pattern data are referred to as pattern configuration lines)
a pattern figure changing unit that rearranges the patterns in a certain rotational direction; a circular electrode candidate arc extraction unit that extracts an arc having the same rotational direction as the pattern data (hereinafter referred to as a circular electrode candidate arc) from among the pattern configuration lines; A first checking means for checking whether any other pattern constituent line falls within the fan shape formed by the arc and center of the electrode candidate arc, and a circle with the minimum radius that can be a circular electrode for a tester centered on the center of the circular electrode candidate arc. ,
and a circular electrode extracting unit that extracts the coordinates of a circular electrode for a tester by using a second checking means to check whether the line intersects with all the pattern constituent lines representing one pattern. It is constructed by calculating the circular electrode coordinates for the retester from the data of the graphical elements that make up the .

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is an explanatory diagram of a printed circuit board wiring pattern related to the present invention, and FIG. 3 is an explanatory diagram of pattern shape change related to the present invention. FIG. 4 is an explanatory diagram of the circular electrode candidate arc extraction means related to the present invention, FIG. 5 is an explanatory diagram of the first check means related to the present invention, and FIG. 6 is an explanatory diagram of the second check means related to the present invention. It is an explanatory diagram.

In FIG. 1, reference numeral 1 denotes a device including a central processing unit (CPU) and a main memory, and is a processing device that sequentially fetches and executes predetermined instructions. Further, 2 is a data input device for reading graphic data of a printed circuit board wiring pattern created by a general mechanical drafting CAD output on a magnetic tape or the like or graphic data of a printed circuit board wiring pattern read by a scanner; 4 is a pattern shape changing unit that changes the input pattern data to contour data in a certain direction representing each wiring pattern; 4 is a circular electrode extracting unit that calculates circular electrode coordinates for the retester from the changed data; 5 is a calculation unit A tester data changing unit changes the tester circular electrode coordinates into a format readable by the tester, and 6 indicates a data output device that outputs the created tester coordinates onto a magnetic tape or the like.

FIG. 2 is an example for explaining the wiring pattern of a printed circuit board handled by the present invention, in which 21 and 26 are individual wiring patterns, and each wiring pattern mainly includes a tester circular electrode 23, 24, Reference numerals 25 and 26 include through-hole portions 24 to 26 and pads 27 for mounting components.

Next, the operation will be explained.

General mechanical drawing CA output on magnetic tape, etc.
Data of only geometric elements such as line segments and arcs representing the outline of the printed circuit board wiring pattern created by D (
A data input device reads a collection of pattern construction lines) or a collection of pattern construction lines read by a scanner into a processing device.

Next, using the pattern figure editing section, the read collection of pattern configuration lines is connected to each component line to form a circular continuous line (hereinafter referred to as an individual pattern circular line) that shows the outline of each wiring pattern. ).

Then, the envelope relationship of the obtained individual pattern annular lines is examined, and other individual pattern annular lines surrounded by an odd number (2n11) of individual pattern annular lines, such as 32 in FIG. Even numbers (2n
By sequentially combining other individual pattern circular lines surrounded by (including O) individual pattern circular lines,
A combination of individual pattern circular lines representing one wiring pattern is created (hereinafter referred to as a pattern line). At the same time, all the individual pattern circular lines surrounded by an even number of individual pattern circular lines are individually rotated in a fixed rotation direction A (either a predetermined clockwise or counterclockwise rotation direction). Correct the direction of the pattern constituent lines of the pattern circular line. Further, the direction of the pattern constituent lines of the individual pattern annular lines is changed so that the individual pattern annular lines surrounded by an odd number of individual pattern annular lines are rotated in the opposite direction to A.

Next, the circular electrode extraction section performs the following processing for each pattern line from the plurality of pattern lines constituting one printed circuit board to obtain the coordinates of the tester circular electrode. When focusing on an arbitrary pattern line, circular arcs (circular electrode candidate circular arcs) in the same direction as the rotational direction A are extracted from the pattern constituent lines (circular electrode candidate circular arcs) as shown in 41 to 45 in FIG. ).

Next, for each of the extracted plurality of circular electrode candidate arcs, an auxiliary line connecting the center of the arc and points of the arc other than the starting point and the ending point, as shown in 51 to 55 in Fig. 5. It is checked whether there are any intersections (56 to 58 in FIG. 5) between the minute and the pattern line of the pattern line other than the circular arc (this is used as the first checking means). Then, the circular electrode candidate arcs that have intersections are deleted from the candidates.

Next, place 61 in FIG. 6 at the center of the remaining circular electrode candidate arc.
As shown in 62, it is assumed that the circle is within the minimum radius that can be used as a circular electrode, and it is checked whether there is an intersection between the assumed circle and the pattern line of the pattern line (this is used as the second checking means).

Then, circular electrode candidate arcs having intersection points such as 63 and 64 in FIG. 6 are deleted from the candidates. The center of the remaining circular electrode candidate arc is the circular electrode coordinate for the tester (6 in Figure 6).
5).

Finally, the tester data changing section summarizes the calculated tester circular electrode coordinates, changes the coordinates into a format that can be input into the tester, and outputs the tester coordinate data to a magnetic tape or the like using a data output device.

〔Effect of the invention〕

As explained above, the present invention inputs the coordinates for the printed circuit board tester without using a dedicated CAD, and inputs data without attribute information added to the tester circular electrode, etc. This has the advantage that tester coordinates can be automatically output from the printed circuit board wiring pattern input using a CAD system or only the geometric figure data of the printed circuit board wiring pattern read using a scanner or the like.

This means that the coordinate data for the tester can be created without being affected much by the method of designing the printed circuit board wiring pattern.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is an explanatory diagram of a printed circuit board wiring pattern related to the present invention, and FIG. 3 is an explanatory diagram of pattern graphic editing related to the present invention. FIG. 4 is a diagram explaining the circular electrode candidate circular extraction means related to the present invention, FIG. 5 is a diagram explaining the first check means related to the present invention, and FIG. 6 is a diagram explaining the second check related to the present invention. It is a figure explaining a means. 1... Processing device, 2... Data input device, 3...
Pattern changing section, 4...Circular electrode coordinate extraction section, 5...
Data changing unit for tester, 6... data output device. 21.22...Wiring pattern, 23...Circular electrode for tester, 24-26...Through hole part, 27...
Component pad, 3L 32...Individual pattern circular line, 41-45...Circular electrode candidate circle, 51-55...Auxiliary line segment, 56-58...Intersection, 61.62...Auxiliary for, 63.64...intersection, 65...coordinates for tester.

Claims (1)

[Scope of Claim] A device for calculating the center coordinates of a circular electrode on a printed circuit board for crimping a test terminal by a tester that conducts an electrical test of the printed circuit board, comprising: a contour line representing a wiring pattern on the printed circuit board; (hereinafter referred to as pattern data, and the graphic elements that make up the pattern data are referred to as pattern configuration lines)
a pattern figure changing unit that rearranges the patterns in a certain rotational direction; a circular electrode candidate arc extraction unit that extracts an arc having the same rotational direction as the pattern data (hereinafter referred to as a circular electrode candidate arc) from among the pattern configuration lines; A first checking means for checking whether any other pattern constituent line falls within the fan shape formed by the arc and center of the electrode candidate arc, and a circle with the minimum radius that can be a circular electrode for a tester centered on the center of the circular electrode candidate arc. ,
and a circular electrode extraction unit that extracts the coordinates of a circular electrode for a tester by using a second checking means to check whether it intersects with all pattern constituent lines representing one pattern, and a circular electrode extraction unit that extracts the coordinates of a circular electrode for a tester. 1. A coordinate calculation device for a printed circuit board tester, characterized in that the coordinate calculation device is configured to calculate circular electrode coordinates for a retester from data of graphical elements constituting the circuit board.