JPH04365178A - Image recognition device for mounting machines, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recognition device used in a mounting machine for mounting electronic components on a printed circuit board.

0002

2. Description of the Related Art In recent years, due to the miniaturization of electronic devices and accompanying miniaturization of electronic components, high positioning accuracy is required when mounting electronic components on printed circuit boards. To achieve this, image recognition devices using CCD cameras have come into wide use.

[0003] Conventionally, an image recognition device for this type of mounting machine has a configuration as shown in FIG. below,
This will be explained with reference to the drawings. As shown in the figure, the illumination means 3 projects light onto the electronic component 2 held by the suction means, and the reflected light is caused to form an image of the electronic component 1 on the CCD camera 5 via the reflecting mirror 4. Then, an error from a predetermined mounting position of the electronic component 2 is recognized by a control circuit (not shown) based on the brightness of the reflected light when the electronic component 2 is illuminated.

0004

[Problems to be Solved by the Invention] However, in the conventional configuration described above, since the illumination means 3 is composed of a single light source, light reflection may occur depending on the color or material of the suction means 1, the electronic components 2, the printed circuit board, etc. There is a problem in that when the rates are extremely similar, it is impossible to distinguish between them, resulting in a mounting error.

The present invention solves the above-mentioned conventional problems, and aims to provide an image recognition device for a mounting machine or the like that can accurately recognize a target electronic component regardless of its color or material.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a CCD that recognizes the posture or position of a workpiece.
The device includes a camera and an illumination means provided near the CCD camera, and the illumination means is composed of a plurality of light emitters having different wavelengths.

[0007]

[Operation] In the above configuration, when multiple light emitters with different wavelengths illuminate the workpiece at the same time, the reflected light causes C
Because the CD camera recognizes the posture or position of the workpiece,
Differences in reflectance of parts of the workpiece or mounting machine can be recognized.

[0008]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In addition, in this example,
Components that are the same as those shown in the prior art example described above are given the same reference numerals, and their explanations will be omitted. As shown in the figure, the image recognition device 11 includes an illumination means 13 having a large number of light emitters 12;
A pair of reflecting mirrors 4 installed inside, CC that connects images
It is composed of a D camera 5 and the like. The illumination means 13 illuminates the workpiece (electronic component) 2 held on the suction means 1 of the mounting machine.
is irradiated diagonally from below. In addition, as shown in FIG. 2, the light emitting body 12 is equipped with LEDs of different wavelengths, such as a red LED 12a and a blue LED 12b, so that the difference in reflectance with the suction means 1 can be clearly seen depending on the material, color, etc. of the electronic component 2. select.

FIG. 3 shows the image recognition device 11 mounted on a mounting machine, in which electronic components 2 are supplied from a supply device 14, held by suction means 1, and rotated intermittently. The image recognition device 11 is provided on the top of the table 15 of the mounting machine, and the electronic component 2 held by the suction means 1 is illuminated by the illumination means 13.

[0010] In the above configuration, the red LED 12a,
Light emitters 12 with different wavelengths such as blue LEDs 12b simultaneously illuminate the electronic component 2, and the reflected light is projected onto the CCD camera 5 to recognize the position and orientation of the electronic component 2 as an image. Then, the signal is input to a control means (not shown) and calculated.
The position of the printed circuit board 16, which is a component to be mounted, is corrected and mounted.

As described above, according to the image recognition device 11 of the embodiment, the illumination means 13 includes red LEDs 12a having different wavelengths.
Since the light is emitted from the blue LED 12b, the difference in reflectance between the electronic component 2 and the suction means 1 of the mounting machine can be reliably recognized.

FIGS. 4 and 5 show another embodiment in which a recognition mark 17 provided on a printed circuit board 16 is illuminated by an illumination means 18, and the reflected light is image recognized by a CCD camera 5. . Image recognition device 19 having this configuration
FIG. 3 shows a state in which the mounting device is mounted on a mounting machine, and its operation and effect are the same as those of the previous embodiment, so a description thereof will be omitted.

[0013]

Effects of the Invention As is clear from the above embodiments, the image recognition device for a mounting machine or the like of the present invention includes a CCD camera that recognizes the posture or position of a workpiece, and illumination means provided near the CCD camera. This illumination means is equipped with multiple light emitters with different wavelengths, and by using this configuration, the light emitters can be changed according to the workpiece, regardless of the color or material of the workpiece, and the light emitter can be Conditions that are easy to extract can be selected and implemented reliably.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an image recognition device in a mounting machine, etc. in an embodiment of the present invention.

[Fig. 2] Plan view of the illumination means of the image recognition device

[Figure 3] External perspective view of the image recognition device installed on a mounting machine

[Fig. 4] Cross-sectional view of an image recognition device in a mounting machine, etc. showing another embodiment

[Figure 5] Plan view of the image recognition device

[Figure 6] Cross-sectional view of the main parts of an image recognition device in a conventional mounting machine, etc.

[Explanation of symbols]

2 Electronic parts (work) 5 CCD camera 12. Luminous body 13. Illumination means

Claims (1)

[Claims] [Claim 1] C for recognizing the posture or position of a workpiece
An image recognition device for use in a mounting machine or the like, comprising a CD camera and illumination means provided near the CCD camera, the illumination means comprising a plurality of light emitters having different wavelengths.