JP2965362B2 - Electronic component recognition method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to surface mounting of electronic components.
The present invention relates to an electronic component recognition method used in such a case.

[0002]

2. Description of the Related Art In recent years, electronic components have been increased in size and electronic components having a size of 50 square or more have become available. In response to this movement, a quadrature package (hereinafter referred to as QFP) component having leads in four directions has a recognition correction method of four-division recognition based on a predetermined lead. At present, a small outline package (hereinafter referred to as SOP) component having a lead can recognize only one visual field.

[0003] The above-described four-division recognition method will be described below with reference to the drawings. FIG. 3 is a view of each field for explaining a conventional QFP component four-division recognition correction method. In FIG. 3, reference numerals 1 to 4 denote 36-pin QFP components 5 as 4
The screen in each visual field at the time of divided visual field recognition is shown. When the visual field moves from the screen 1 to the screen 2, it is performed based on the coordinate data of the reference lead 6. That is, based on the camera position on the screen 1 and the camera pixel coordinates of the reference lead 6, the position of the reference lead 6 when developed in the XY coordinate system is stored. Next, the amount of movement such that the position of the reference lead 6a when developed on the XY coordinate system based on the camera position when moving to the screen 2 and the camera pixel coordinates of the reference lead 6a matches the position of the reference lead 6 on the screen 1 Is determined. Similarly, when the visual field moves from the screen 2 to the screen 3 and further from the screen 3 to the screen 4, the positions of the reference leads 7 and 7a, and the reference leads 8 and 8a
Is determined such that the positions of the two move in the same position. Thereby, the visual field 9 of the entire QFP component 5 can be recognized. Based on the recognition result, the holding posture and the holding position of the QFP component 5 are corrected, and the QFP component 5 is placed at a predetermined position on the substrate.
Implement

[0004]

However, in the above-described conventional configuration, the SOP component has leads only in two directions.
Therefore, even if you try to recognize a 4-split view, it is a common standard between views.
In some cases, there is no lead . Therefore, the direction of the side having no reference lead does not have a fixed visual field movement amount . Therefore, there is a problem that only the visual field recognition can be performed and the quadrant visual field cannot be recognized.

[0005] The present invention is intended to solve the conventional problems described above, an electronic component recognition which can lead to vision recognizes the whole electronic parts can be split field recognition even if there is only large electronic components in two directions It is intended to provide a method .

[0006]

In order to solve the above problems, an electronic component recognizing method according to the present invention uses a plurality of resources on two symmetrical sides.
In the method for recognizing an electronic component having a
Recognizes the corner of one side of the product and detects the reference lead
Step and the next screen from the coordinate data of the reference lead.
To determine if there is a common reference lead for
Steps and common criteria for the next screen in the judgment step
If the lead exists, it is determined from the coordinate data of the reference lead.
Moving the determined visual field movement amount;
There must be a common reference lead on the next screen in the step
If a predetermined amount is moved, the corner of the other side of the electronic component is moved.
Recognizing the minute and detecting the reference lead;
The steps recognize all leads of the electronic component .

[0007]

According to the above-described structure, the electronic component having a lead-free side can be divided and recognized by fixing the moving amount in the direction of the lead-free side of the electronic component so that the electronic component has a lead-free side that cannot be included in one field of view. It is possible to recognize the entire large electronic component.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an electronic component according to an embodiment of the present invention.
It is a block diagram of an electronic component mounting device for explaining a recognition method . In FIG. 1, reference numeral 11 denotes an SOP component to be recognized, which has leads in two symmetrical directions. That is, the SOP component 11 has sides without leads at symmetrical positions. The robot 12 holds the SOP part 11 and
It is movable in the Y direction. Recognition camera 13 holds S
Each divided section of the SOP component 11 located below the OP component 11 is recognized. The recognition processing device 14 to which the recognition camera 13 is connected receives an SOP component based on a signal from the recognition camera 13.
Image processing is performed on each of the 11 divided sections to detect a reference lead.
Main program CPU 15 to which the recognition processing device 14 is connected
Has a storage device, stores the coordinate data of the reference lead from the recognition processing device 14 in the storage device, determines from the stored coordinate data whether there is a lead on the side of the SOP component 11 in the screen moving direction, If there is a lead on the side of the component 11 in the screen moving direction, the moving amount is determined by the conventional method.
If there is no lead on the side of the OP component 11 in the screen moving direction, the moving amount as a predetermined fixed amount is determined. An NC robot controller 16 connected to the main program CPU 15 is connected to the robot 12 and controls the drive of the robot 12 according to the amount of movement from the main program CPU 15.

The operation of the above configuration will be described below. 1. The robot 12 holds the SOP part 11 to be recognized. First, the upper left part of the SOP part 11 is recognized by the recognition camera 13.
Move the robot 12 to come up.

[0010] 2. The upper left portion of the held SOP component 11 is recognized by the recognition camera 13 as a screen in the first field of view of the quadrant, and image processing is performed by the recognition processing device 14 to detect a reference lead. Then, the coordinate data of the reference lead is stored in the storage device of the main program CPU15.

3. When moving from the screen of the first field of view to the screen of the second field of view, the main program CPU 15 uses the coordinate data of the reference lead stored in the storage device of the main program CPU 15 in step S1 of FIG. It is determined whether a lead exists on the side of the SOP component 11 in the direction of moving to the next screen. If the lead exists on the side of the SOP component 11 in the direction of moving to the next screen, the conventional technique is used in step S2 of FIG. Is transmitted to the NC robot controller 16 to control the drive of the robot 12,
The SOP component 11 is moved to the second view screen showing the upper right portion of the SOP component 11. If there is no lead on the side of the SOP component 11 in the moving direction to the next screen, the moving amount which is a predetermined fixed amount is transmitted to the NC robot controller 16 in step S3 in FIG. Drives the robot 12 to move the SOP part 11 to the screen of the second field of view showing the upper right part of the SOP part 11.

4. After completing the movement to the screen of the second field of view showing the upper right part of the SOP part 11, the held SOP part
The recognition camera 13 recognizes the upper right part, which is the four-division section of 11, and performs image processing on the upper right part with the recognition processing device 14 to detect the reference lead. Then, the coordinate data of the reference lead is stored in the storage device of the main program CPU15.

5. When moving from the screen of the second visual field to the screen of the third visual field, the main program CPU 15 uses the coordinate data of the reference lead stored in the storage device of the main program CPU 15 in step S4 of FIG. It is determined whether or not a lead exists on the side of the SOP component 11 in the direction of moving to the next screen. If the lead exists on the side of the SOP component 11 in the direction of moving to the next screen, the conventional technique is used in step S5 of FIG. Is transmitted to the NC robot controller 16 to drive and control the robot 12, and the SO
The P component 11 is moved to the screen of the third field of view showing the lower right part of the SOP component 11. If there is no lead on the side of the SOP component 11 in the direction of movement to the next screen, a predetermined fixed amount of movement is transmitted to the NC robot controller 16 in step S6 in FIG. Drives and controls the robot 12 to change the SOP part 11 to the SOP part 11.
Is moved to the screen of the second visual field showing the lower right part of.

6. After the movement to the screen of the third field of view showing the lower right part of the SOP part 11, the held SOP part
The recognition camera 13 recognizes the lower right portion, which is a four-division section of 11, and performs image processing on the lower right portion with the recognition processing device 14 to detect a reference lead. Then, the coordinate data of the reference lead is stored in the storage device of the main program CPU15.

[0015] 7. When moving from the screen of the third field of view to the screen of the fourth field of view, the main program CPU 15 uses the coordinate data of the reference lead stored in the storage device of the main program CPU 15 in step S7 of FIG. It is determined whether there is a lead on the side of the SOP component 11 in the direction of movement to the next screen. If the lead exists on the side of the SOP component 11 in the direction of movement to the next screen, the conventional technique is used in step S8 of FIG. Is transmitted to the NC robot controller 16 to drive and control the robot 12, and the SO
The P component 11 is moved to the screen of the fourth field of view showing the lower left part of the SOP component 11. If there is no lead on the side of the SOP component 11 in the moving direction to the next screen, the moving amount which is a predetermined fixed amount is transmitted to the NC robot controller 16 in step S9 in FIG. Drives and controls the robot 12 to change the SOP part 11 to the SOP part 11.
Is moved to the screen of the fourth field of view showing the lower left part of.

8. In this way, even in the case of a large SOP component 11 having leads in only two symmetrical directions, it is possible to recognize the four-division field of view, and the SOP component 11 by the robot 12 can be recognized.
The entire holding state is recognized, and the holding posture and the holding position of the SOP component 11 are corrected based on the recognition result. Then, the SOP component 11 is mounted at a predetermined position on the board.

Although the present embodiment has been described with respect to the four-divided visual field recognition, the same effect can be obtained with the two-divided visual field recognition or a plurality of divided visual field recognitions.

[0018]

As described above, according to the present invention, the movement to the next screen is the movement of a fixed amount for the side without a lead, and the movement amount for the side with a lead is determined from the coordinate data of the reference lead. By using the method described above, it is possible to recognize and mount a divided FOV even for a large SOP component that does not fit in one visual field.

[Brief description of the drawings]

FIG. 1 is a block diagram of an electronic component mounting apparatus for explaining an electronic component recognition method according to one embodiment of the present invention.

FIG. 2 is a flowchart illustrating an electronic component recognition method according to an embodiment of the present invention.

FIG. 3 is a view of a field-of-view recognition screen for explaining a conventional QFP component recognition and correction method.

[Explanation of symbols]

 11 SOP parts 12 Robot 13 Recognition camera 14 Recognition processor 15 Main program CPU 16 NC robot controller

Claims (1)

(57) [Claims] 1. An electron having a plurality of leads on two symmetrical sides.
In the method for recognizing a component, a corner on one side of the electronic component is provided.
Detecting the reference lead by recognizing the part;
From the coordinate data of the reference lead, the reference
Determining whether a password exists or not;
If there is a common reference lead on the next screen in the step
For example, the visual field movement amount determined from the coordinate data of the reference lead
Move to the next screen
If a common reference lead does not exist, move a predetermined amount
And recognizes the corners of the other side of the electronic component and
The steps of detecting the lead and the preceding steps
Electronic component recognition method that recognizes all leads of electronic components
Law.