JPH08305742A - Method for normalizing reference coordinate and angle of component - Google Patents

Abstract

PURPOSE: To make it unnecessary to prepare exclusive component arrangement coordinate/angle transformation table or secure maintenance time and to easily connect data on plural CAD systems and CAM/CAT systems by normalizing the reference coordinates and angle of each component in CAD output data. CONSTITUTION: This normalizing method is constituted of component reference terminal determining processing for finding out the center coordinates of a component and a component direction determining reference terminal to be used for orienting a component in a fixed direction from a component terminal arrangement coordinate data group outputted from an upper CAD system, component reference angle determining processing for rotating and transforming the arrangement coordinates of the component terminal around the center coordinates of the component orienting the component in the fixed direction and finding out the coordinates with the component direction determining reference terminal arranged in the same direction so as to find a reference angle and component arrangement angle determining processing for finding out a rotational angle matched with terminal coordinates with the objective component actually arranged from the reference angle/arrangement coordinates and making the angle the normalized angle of the component.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a printed board CAD / CA.
Relating to graphic processing in the M / CAT system, especially C
The present invention relates to a processing method for normalizing component arrangement coordinates and angles in an AM / CAT system based on a unified standard.

[0002]

2. Description of the Related Art Various types of printed board CAD systems for designing using a computer have been widely used. Further, using the component mounting information generated by these CAD systems, a CAM system for assembling components on a printed board and a CAT system for inspecting are used. However, the component arrangement coordinates and the component arrangement angles output from the CAD system may be produced by the CAD system, and even if the components are of the same type,
With the CAD system, standard coordinates for component placement,
The reference angle is different. If the component mounting information output from the CAD system based on the different reference coordinates and reference angles is used as it is, the CAM / CAT system side has trouble in assembly and inspection such as component mounting in the wrong direction. For this reason, the CAM / CAT system side prepares a dedicated component placement coordinate and angle conversion table for each CAD system, and normalizes the component placement coordinate and angle based on a unified standard by a conversion process.

Since this method normalizes the component mounting information output by different CAD systems, it is necessary to prepare a dedicated component arrangement coordinate and angle conversion table for each CAD system. A conversion table is created / corrected / added each time such as when added or when the number of used parts increases. On the other hand, electronic parts manufacturers have commercialized a wide variety of new parts for realizing high density and multi-functionality of printed boards, which makes it difficult to create and maintain a conversion table.

[0004]

SUMMARY OF THE INVENTION The present invention solves the problem that it takes time to create and maintain a dedicated component placement angle conversion table for each CAD system.
The data connection between the plurality of CAD systems and the CAM / CAT system is facilitated by normalizing the component arrangement coordinates and angles based on the component terminal arrangement coordinate data group output from the D system.

[0005]

In order to solve the problems, the present invention creates a graphic based on a target terminal arrangement coordinate data group, and sets the direction of the parts in the X-axis direction (horizontally long) or the Y-axis direction (horizontal direction). (Longitudinal) aligned with one direction and the reference component terminals are oriented in the same direction as the reference angle.The angle of the target component is calculated from the coordinates of the reference angle, and the normalized component placement angle And means to

[0006]

By calculating the reference angle coordinates based on the component terminal arrangement coordinate data group mounted by CAD, and calculating the actual component arrangement angle of the target component by the reference angle and the coordinates, A dedicated component arrangement coordinate / angle conversion table is not required, and the time required to create and maintain this conversion table can be eliminated.

[0007]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 7. FIG. 1 is a block diagram of component standard coordinates and angle normalization processing. (1) Used to align a component center coordinate and a component in a certain direction from a component terminal arrangement coordinate data group output from a host CAD system. (2) Rotate the component terminals around the center coordinates of the component, align the components in a fixed direction based on the orientation of the reference terminal, and determine the reference angle. (3) Obtaining the rotation angle that matches the terminal coordinates where the target component is actually placed from the reference angle / placement coordinates, and making the angle the normalized component angle The angle determination process is performed, and the result is output as a normalized component angle.

The contents of each of these processes will be described based on the example of the component terminal arrangement coordinate data group shown in FIG.

In the component reference terminal determination processing, the terminal x coordinate value x1 is calculated from the component terminal arrangement coordinate data group of the component A shown in FIG.
˜x3, terminal y coordinate values y1 to y2, terminal names 1 to 6 are extracted and stored in the terminal x coordinate 31, terminal y coordinate 32, and terminal name 33 of the terminal table of FIG. And Figure 3
The maximum x-coordinate value x3 and the minimum x-coordinate value x1 are searched for from the terminal x-coordinate 31 group of the component terminal table, and the midpoint thereof is calculated and used as the x-coordinate of the component center coordinate 21. Similarly, from the terminal y-coordinate 32 group, the maximum y-coordinate value y2
Then, the y-coordinate minimum value y1 is searched for, and the midpoint thereof is set as the y-coordinate of the component center coordinate 21. On the other hand, when all the terminals are aligned on the same line and parallel to the X axis or the Y axis as in the part B shown in FIG. 2, the maximum coordinate value and the minimum coordinate value have the same coordinate. one of them to the midpoint either order. Next, the terminal names 33 groups of the terminal table of FIG. 3 and the terminal names 41 of the component terminal name candidate table of FIG. And the terminal name 33 having the same name is used as the component direction determination reference terminal 22. At that time, the terminal names 41 are always compared in the order of the terminal name 1 having a higher name priority 42 to the terminal name A1 having a lower name.

Next, the component reference angle determination process unifies the long sides of the component in the X-axis direction (horizontally long) or the Y-axis direction (vertically long) as a condition for obtaining the arrangement coordinates at the reference angle. In FIG. 5, the terminal row length lx is calculated from the maximum x coordinate x5 and the minimum x coordinate x1, similarly, the terminal row length ly is calculated from the maximum y coordinate y5 and the minimum y coordinate y1, and the terminal row length is calculated. When the length lx> the length of the terminal row ly, the component direction is the X-axis direction (horizontal length), and the length of the terminal row lx <the length of the terminal row ly.
In the case of, the direction is the Y-axis direction (longitudinal). Also, the length of the terminal row l
When x and the terminal row ly have the same length, they are unified in the X-axis direction (horizontally long). Furthermore, when judging only by the length of the component terminal row, even in the same component type, there are two directions (0 degree and 18 degrees).
Since the components facing 0 degrees, 90 degrees, and 270 degrees are mixed, a process for aligning the component direction determination reference terminals 22 in one direction is performed as a supplementary condition. The method is to select one direction from the eight directions A to H in 45 degree units in FIG.
Direction reference range lines 511 and 512 are set at the position of degree, and it is checked whether or not the component direction determination reference terminal 22 is included in the range. If it is within the range, it is determined to face the designated direction, and if it is out of the range, it is determined not to face the designated direction. In FIG. 5, when it is desired to align the component direction determination reference terminals 22 in the right direction, a direction reference line 51 is drawn from the component center coordinates 21 in the direction A, and the direction reference range line 511 is located at a position 45 degrees above and below the line. , 512 are set and it is checked whether or not they are included in the range. Since the terminals 1 to 3 are included in the range, it is determined to be in the right direction, the other conditions are not met, and it is not in the right direction. The case where all two conditions are satisfied is the reference angle. To obtain the reference angle, the component center coordinates 2 of the target component determined by the component reference terminal determination process 2
Rotation is performed with 1 as the center, and it is checked whether the converted coordinates after rotation match the above conditions. The rotation angle at that time can be specified as an arbitrary angle, but the current shape of electronic parts is often quadrangular, and the device for assembling parts is
Since some models can only operate in units of degrees, the rotation angle is set in units of 90 degrees in this embodiment, and the direction determination condition is that the long side of the component is parallel to the X-axis direction (horizontally long) and the component direction determination reference terminal is used. When 22 is aligned to the right, the reference angle is assumed, and the arrangement coordinates are searched for. In the example 1 of FIG. 6, the maximum x coordinate x4
And the terminal row length lx obtained from the minimum x coordinate x1, the maximum y coordinate y4, and the terminal row length ly obtained from the minimum y coordinate y1 are compared, and the terminal row length lx ≧ terminal row Length ly
Therefore, it is determined to be parallel to the X axis (horizontally long), and then the position of the component direction determination reference terminal 22 is checked. A direction reference line 51 is drawn in the right direction from the part center coordinates 21 and the direction reference range line 5 is placed at a position 45 degrees above and below the line.
Subtract 11,512. Since the component direction determination reference terminal 22 is not included in the range, the reference angle is not set. Similarly, the rotation is performed in units of 90 degrees, and the determination with the converted coordinate value after the rotation is repeated. In FIG. 6, in the case of Example 2, since the direction determination condition is satisfied, this angle is set as the reference angle,
Let the coordinates be the reference angle coordinates.

Finally, in the component placement angle determination processing, the terminal coordinates are rotated at an arbitrary angle from the reference angle coordinates obtained in the component reference angle determination processing with the component center coordinates 21 as the center, and the actual component is determined. The rotation angle at the time when all the terminals match the coordinates where the terminals are arranged is the arrangement angle of the target component. FIG. 7 is a diagram in which terminals other than the reference terminal are omitted from the component having the reference terminal of 1. In this case, when the rotation angle 72 is rotated clockwise by 90 degrees from the reference angle coordinate 71, Since the arranged coordinates and the coordinates of all terminals match, the rotation angle 72 = 90 degrees is set as the component arrangement angle. Similarly, the angle is calculated for all the components output from CAD. Through the above processing, the component reference coordinates and angles can be normalized.

[0012]

EFFECTS OF THE INVENTION By normalizing the parts reference coordinates and angles in CAD output data, it is possible to eliminate the creation of dedicated parts arrangement coordinates and angle conversion tables and maintenance time, and to connect data between multiple CAD systems and CAM / CAT systems. To facilitate.

[Brief description of drawings]

FIG. 1 is a block diagram of component standard coordinates and angle normalization processing.

FIG. 2 is an explanatory diagram of a component terminal arrangement coordinate data group.

FIG. 3 is an explanatory diagram of a component terminal table.

FIG. 4 is an explanatory diagram of a component direction determination specification.

FIG. 5 is an explanatory diagram of an example of component direction determination.

FIG. 6 is an explanatory diagram for determining a component placement angle.

[Explanation of symbols]

21 ... Component center coordinates, 22 ... Component direction determination reference terminal, 3
1 ... Terminal x coordinate, 32 ... Terminal y coordinate, 33 ... Terminal name,
41 ... Terminal name, 42 ... Name priority.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuru Okamura 832 Nagakubo, Horiguchi, Hitachinaka City, Ibaraki Prefecture 2 Within Hitachi Instrument Engineering Co., Ltd. (72) Inventor, Seiya Kojima 882, Ichige, Ichige, Hitachinaka City, Ibaraki Hitachi Measuring Instruments Division

Claims (1)

[Claims] 1. In a system for creating CAM information required for assembly based on output data from a printed board CAD, a component terminal arrangement coordinate data group is input, and a component is arranged based on all terminal arrangement coordinates of a target component. Process of obtaining the center coordinate of the component, a step of obtaining the component direction determination reference terminal used for aligning the components in a certain direction, and rotating the component terminal arrangement coordinate data around the center coordinate of the component to move the component to the X-axis.
A step in which the placement reference coordinates determined by unifying in one direction the axial direction or the Y-axis direction and aligning the component direction determination reference terminals with the reference angle of the target component, the target component from the reference angle A step of obtaining an angle at which is actually arranged, and a part standard coordinate and an angle normalizing method characterized by having these steps.