JP2542784B2 - Automatic parts recognition device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic component recognizing device for recognizing a component by adding a component name, its arrangement coordinate information and arrangement layer information to manufacturing data of a printed circuit board.

[0002]

2. Description of the Related Art Conventionally, as this type of component recognition method,
It has been common for an operator to specify the name of a part with a keyboard and to input the coordinates of the part on a printed circuit board with a coordinate input device such as a mouse or a digitizer.

[0003]

However, in the above-mentioned conventional component recognition method, it takes a long time to manually input all the components mounted on the printed circuit board, which is particularly large. A large-scale printed circuit board has a large number of parts, which requires a huge amount of time.

The present invention has been made in order to solve such a problem, and its purpose is to automatically recognize a component in the manufacturing data of a printed circuit board and significantly reduce the processing time required to recognize the component. An object is to provide an automatic component recognition device.

[0005]

In order to achieve the above-mentioned object, the present invention is an automatic component recognition apparatus for adding a component name, component placement coordinate information and placement layer information to manufacturing data of a printed circuit board, Component recognition means for deciding a pad position in the manufacturing data of at least one component and recognizing the component based on the component name, the component arrangement coordinate, and the arrangement layer information input from the outside, and the component registered in advance Candidate part selection means for selecting a candidate part that may be arranged on a pad in the manufacturing data connected to the recognized part based on the name and circuit connection information, and a candidate registered in advance It is checked whether the pin coordinates of the candidate part and the pad coordinates in the manufacturing data match with reference to the outline information of the part, and when they match, the candidate part is placed on the pad. It is characterized in that it has a part shape matching means for recognizing and.

[0006]

In the present invention, the component recognition means determines the pad position in the manufacturing data of the printed circuit board based on the input information to recognize the component. This part recognition is performed for one or more parts. Next, the candidate part selection means selects a part that may be placed on the pad in the manufacturing data connected to the recognized part as a candidate part based on the part name and circuit connection information registered in advance. To be done. The part shape matching means can check whether the pin coordinates of the candidate part and the pad coordinates in the manufacturing data match by referring to the preliminarily registered part outline information. If the pin coordinate and the pad coordinate match, the candidate component is recognized as the component to be placed on that pad. When there are a plurality of candidate parts, the parts of other parts are recognized first, and the parts are recognized after narrowing down the candidate parts. Therefore, by inputting one or more pieces of component information and recognizing the component, the component connected thereto can be automatically recognized.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an automatic component recognition device of the present invention. In FIG. 1, A
Is an automatic component recognition device for imparting component information to the manufacturing data 1 of the printed circuit board to be processed for component recognition. The automatic component recognition device A is connected to a keyboard 3 and a mouse 4 which are external input devices and a monitor 5 which is an external device for output, and is configured as an automatic component recognition system including these external devices. In the automatic component recognition device A, component information is added to the manufacturing data of the printed circuit board, and the circuit diagram of the original printed circuit board is created based on the result. The processing data storage unit 2 of the automatic component recognition device A stores the manufacturing data 1 to be processed, which is sent from the outside, and the manufacturing data 1 includes information on a component name, a component arrangement coordinate, and a component arrangement layer to be used. It is not included, and the components are automatically recognized by inputting information of one or more components from an external device as described later.

The manufacturing data 1 contains the pad coordinates of the pad portion, and it is clear which pad is connected to which pad by the wiring between the pads. Reference numeral 6 is an input / output control unit for controlling input / output devices such as the keyboard 3, mouse 4, and monitor 5, and 7 is a component recognition unit for performing component recognition based on the component information input by the operator. Reference numeral 8 is a candidate that may be placed on the pad of the manufacturing data connected to the component recognized by the component recognition unit 7 with reference to the component name and circuit connection information registered in advance in the circuit information storage unit 9. It is a candidate part selection unit for selecting a part. Further, reference numeral 10 is a component shape collating unit for collating whether or not the position of each pin of the candidate component matches the pad position in the manufacturing data by referring to the component outer shape information registered in advance in the component outer shape information storage unit 11. Is.
The operation of each of the above units will be described later in detail.

FIG. 2 is a diagram showing an example of the manufacturing data 1. This manufacturing data was created based on the circuit diagram of the printed circuit board. As shown in Fig. 2, the information of the pad portion and wiring is clear in the figure, but as mentioned above, which part is placed on which pad. It does not include information on what to do. The manufacturing data is displayed on the monitor 5, and when the parts are recognized by the manual part recognition unit 7, the pad portion of the manufacturing data displayed on the monitor 5 using the mouse 4 is surrounded by a frame. . After that, by inputting the component name with the keyboard 3, the component having the desired component name is arranged on the designated pad portion. For example, as shown in FIG. 3, a pad portion in the manufacturing data for which a part is to be recognized is surrounded by a broken line frame B, and a desired part can be arranged by inputting a part name to be arranged in this frame B. Be seen. The layout layer can be specified by changing the layer displayed on the monitor 5,
The layer currently displayed is the placement layer of the component. As described above, the component name, the component arrangement coordinate, and the component arrangement layer can be determined, and the component can be recognized manually.

FIG. 4 is a diagram showing an example of component names and circuit connection information stored in the circuit information storage unit 9. The circuit connection information is information indicating which pin of each component each signal is connected to. The candidate component selection unit 8 refers to the component name and the circuit connection information of the circuit information storage unit 9 and arranges them on the pad portion (which has not been recognized yet) connected to the component already recognized by the wiring. Parts that may be performed are searched for as candidate part names. Of course, the pin numbers of the candidate parts are also searched at the same time. For example,
FIG. 5 is a diagram showing an example of manufacturing data in which a component with the component name UNIT1 is recognized as a component, and a black circle in the drawing is a pad whose component has been recognized. An example in which parts and pin numbers are given from the stage of FIG. 5 will be described.

According to the connection information of the circuit of FIG. 4, since the 6th pin of the part name UNIT1 and the 13th pin of the UNIT2 are connected by wiring, the candidate part selection section 8 displays the manufacturing data as shown in FIG. The candidate part name UNIT2 and the pin number 13 are given to the pad connected to the 6th pin of the part name UNIT1. Further, in the candidate part selection unit 8, since the 2nd pin of the part name UNIT1 is connected to the 1st pin of the part name D1 and the 1st pin of the part name D2 based on the connection information of FIG. 4, it is shown in FIG. Unit 1
A candidate part name is given to the pad connected to each of the 2nd pins. However, since there are two corresponding pads here, candidate component names D1 and D2 are given to the respective pads.

FIG. 7 is a diagram showing an example of the component outline information stored in the component outline information storage unit 11. The component outline information is information indicating relative coordinates up to each pin other than the reference pin with the reference pin of the component as the origin. Part shape matching unit 10
Then, referring to the component outline information in the component outline information storage unit 11,
The final part recognition is performed by calculating the pin coordinates of the candidate parts listed above as candidates and checking whether the pin coordinates match the pad coordinates in the manufacturing data.

For example, as shown in FIG. 6, the candidate part name U
Assuming that NIT2 and pin number 13 are given, first, in the component shape matching unit 10, from the component outer shape information storage unit 11 to FIG.
The component outline information of the component name UNIT2 as shown in is acquired. Next, the component shape matching unit 10 calculates the relative coordinates of the other pins with the pin number 13 as the origin from the obtained component outline information. The part shape matching unit 10 further adds the candidate part UNIT2 and the pad coordinates to which the pin number 13 is given in the manufacturing data to the relative coordinates of the respective pins calculated previously, so that the part name U in the manufacturing data is obtained.
Each pin coordinate of NIT2 is calculated. If there is a pad in the manufacturing data that matches the respective pin coordinates, as shown in FIG.
The placement coordinates of IT2 can be determined.

Further, since the parts may be arranged in a rotated manner, the part shape collating unit 10 rotates the other pin coordinates around the pin number 13 to determine whether there is a matching pad. Be examined. If there are a plurality of matching pads, the arrangement coordinates are not determined here and are stored in the processing data storage unit 2 as processing in-progress data, and the component recognition processing of other components is performed first. That is,
The pads of the parts for which the parts have been recognized are sequentially excluded from the processing target, and candidates are gradually narrowed down. Therefore, it is necessary to wait until there is a single matching pad before determining the parts arrangement coordinates.

Next, the overall operation of the automatic component recognition apparatus will be described with reference to the flowchart of FIG. In FIG. 9, first, the manufacturing data 1 to be processed is stored in the processed data storage unit 2 (S1). Next, the manual component recognition unit 7
Then, as described with reference to FIGS. 2 and 3, the component name, the component arrangement coordinate, and the component arrangement layer are determined based on the information input by the mouse 4 or the keyboard 3, and the component is recognized (S).
2). This part recognition is performed for one to a plurality of parts. When the component recognition is completed, the candidate component selection unit 8 may place the candidate component on the pad connected to the component-recognized component based on the circuit connection information as described in FIGS. 5 and 6. Name and pin number are added (S3, S
4). In this case, the candidate part selection unit 8 determines whether or not the candidate part name can still be given each time the candidate part name is given (S3), and the candidate part name is given until no more can be given (S4). .

When the assigning of the candidate part name and the pin number is completed, the part shape matching unit 10 acquires the part outline information of the candidate part and determines the placement coordinates of the candidate part, as described with reference to FIGS. 7 and 8. (S5, S6). At this time, the part shape matching unit 10 determines whether or not there is a pad to which the candidate part name is given (S5), and the arrangement coordinates of the individual candidate parts are determined until there is no pad to which one candidate part name is given. A determination process is performed (S6). That is, for pads to which one candidate part name is assigned,
The process of 6 is performed. In this way, when the component arrangement coordinates are determined for all the pads to which one candidate component name is given,
The candidate part selection unit 8 checks whether or not a new candidate part name can be given (S7).
By repeating the processes of to S6, the component arrangement coordinates of the newly added candidate component are determined.

On the other hand, if a new candidate part name cannot be given, it is checked whether or not all the parts to be arranged on the printed board have been recognized (S8). Then, if there is an undetermined component and component recognition has not been completed for all components, the process returns to S2 and the manual component recognition unit 7 recognizes one or more components in the same manner as described above. . That is, when there is no pad to which one candidate part name is given and a new candidate part name cannot be given, it is determined that automatic part recognition cannot be performed any more, and pad designation and part name input are performed again. Based on this, the above-described assignment of the candidate component name and determination of the placement coordinates of the components listed as candidates are performed. In this way, the processing of S2 to S8 is repeated, and when all the components to be arranged on the printed circuit board are recognized, the series of component recognition processing ends.

Here, in S6, the part shape matching unit 10
When a plurality of candidate component names are given in the case of determining the component arrangement coordinates in, the component recognition processing of other components is performed first. For example, as described above, in FIG. 6, the part name UNIT
There are two pads connected to 1, and candidate component names are D1 and D2. In such a case, S6 is used.
Is difficult to perform. Therefore, as shown in FIG. 8, the component shape matching unit 10 first performs processing on the pad connected from the third pin of the component name UNIT2 by wiring. In this case, the candidate part selection unit 8 assigns the candidate part name D1 and the pin number 2 to this pad as shown in FIG. 8, and the part shape matching unit 10 adds 2 to the part name UNIT1.
Arrangement coordinates of the component having the component name D1 including the pad connected to the number pin are determined. As a result, the candidate part name given to the pad 21 is decreased by one, and the candidate part name D2,
When the pin number is 1, and the part shape matching unit 10 has one candidate part name, the placement coordinates of the remaining candidate part names D2 are determined.

As described above, the partial recognition processing of all the parts on the printed circuit board is completed, and the circuit diagram of the original printed circuit board is created based on the obtained result. That is, the original circuit diagram is restored based on the manufacturing data of the printed circuit board, and when the circuit diagram disappears and the manufacturing data remains, the circuit diagram of the printed circuit board is created based on the manufacturing data. In this embodiment, the names of one or a plurality of components and the layout information are first input, and the components can be automatically recognized after that, so that the burden on the operator can be significantly reduced.
Further, even for a large printed circuit board, since the components can be recognized almost automatically, the processing time does not become enormous, and the processing can be performed in an extremely short time.

[0020]

As described above, according to the present invention, if at least one part information is input, the parts connected to it can be automatically recognized, and all the individual parts as in the prior art can be recognized. This has the effect of significantly reducing the processing time required for component recognition as compared with the method of recognizing by hand.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an automatic component recognition device of the present invention.

FIG. 2 is a diagram showing an example of manufacturing data.

FIG. 3 is a diagram showing a state in which a pad portion to be recognized as a component in the manufacturing data of FIG. 2 is surrounded by a frame for component recognition.

FIG. 4 is a diagram showing an example of circuit connection information.

FIG. 5 is a diagram showing a state in which one part is recognized as part of the manufacturing data of FIG.

6 is a diagram showing a state in which candidate part names and pin numbers are further added to the manufacturing data of FIG.

FIG. 7 is a diagram showing an example of component outline information.

FIG. 8 is a diagram showing a state in which candidate parts are further recognized based on the manufacturing data shown in FIG. 6;

9 is a flowchart showing a flow of overall component recognition processing in the embodiment of FIG.

[Explanation of symbols]

 A automatic component recognition device 1 manufacturing data 2 processing data storage unit 3 keyboard 4 mouse 5 monitor 6 input / output control unit 7 manual component recognition unit 8 candidate component selection unit 9 circuit information storage unit 10 component shape verification unit 11 component outline information storage unit

Claims (2)

(57) [Claims] 1. A printed circuit board manufacturing data includes a part name,
An automatic component recognition device for providing component placement coordinate information and placement layer information, the component name input from the outside,
Based on the component recognition means for deciding the pad position in the manufacturing data of at least one component based on the component arrangement coordinates and the arrangement layer information and recognizing the component, and the component name and circuit connection information registered in advance. With reference to the candidate part selection means for selecting a candidate part that may be placed on the pad in the manufacturing data connected to the recognized part, and the external information of the previously registered candidate part. A part shape matching means for checking whether the pin coordinates of the candidate part and the pad coordinates in the manufacturing data match and recognizing the candidate part as a part to be placed on the pad when they match. Characteristic automatic parts recognition device. 2. The part shape matching means, when there are a plurality of candidate parts, recognizes the other parts first and narrows down the candidate parts before performing the part recognition. 1. Automatic component recognition device.