JPS63251862A - Production of standard data of recognizer for substrate package parts - Google Patents

Abstract

PURPOSE:To shorten the operating time and to decrease the setting mistakes by forming the parts packaged properly via the display with which an ideal pattern can be clearly detected by a camera means, photographing said ideal pattern via the camera means and producing the standard data based on said photographing data. CONSTITUTION:An ideal pattern substrate Pt is obtained by painting the surfaces of parts A-D packaged into a substrate P in the colors that can be clearly discriminated from the one painted on the surface of the substrate P. The pictures (a)-(d) of parts A-D are obtained satisfactorily with the substrate Pt even though these parts A-D are turned collectively into pictures. Therefore the standard data on centers Ca-Cd, windows Wa-Wd, etc., can be easily extracted out of the pictures (a)-(d) respectively with display of those pictures at a picture display part. Thus the operating time is shortened and the setting mistakes can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for creating standard data for a board-mounted component recognition device, and more specifically, to a method for creating standard data for a board-mounted component recognition device. on how to create.

Prior Art FIG. 7 shows a block diagram of an example of a board-mounted component recognition device.

This board-mounted component recognition bag W51 obtains an image of the board P with the camera 52, performs image processing on the image processing section 53, and stores the image in the image memory 54. The arithmetic processing unit 55 refers to the standard data set in advance in the standard data memory 56, and calculates the parts A and 1 on the board P from the image data in the image memory 54.
The mounting states of B, C, and D are recognized, and the results are displayed on the image display section 57. 58 is an input operation section for an operator to perform operations.

By the way, in order to create standard data that serves as a standard for component mounting states, a board on which components have been properly mounted is shown on the camera 52, the image is displayed on the image display section 57, and while viewing the image, the operator performs a predetermined This is done by extracting standard data and inputting it from the input operation section 58.

Specifically, for example, standard data includes the position of the center of gravity of parts, the window for each part, etc.
Inputting such standard data includes inputting numerical values from a keyboard, specifying a position on an image displayed on the image display section 57 with a mouse or a light pen, and the like.

Problems with conventional technology Conventionally, the board P on which components are properly mounted is used as a board-mounted component! 1
The standard data is created by displaying the information on the identification device 51.

However, there are various forms of parts to be mounted, such as the shape and gloss of the surface, as shown in Fig. 8.

The colors etc. are different.

Therefore, when these parts of various shapes are imaged all at once, as shown in FIG. 9, for example, image a of part A is obtained as a proper R image, but other parts B, C, D Images S, C, and D may not be obtained as appropriate images.

Then, to obtain the standard data as shown in FIG. 10, the center of gravity C1 and the window W are obtained from the image a.

It is easy to obtain the centroid point C from images S, c, and d, respectively.
,,Cc,C-,window W,,Wc.

There are problems in that it is difficult to extract W-, it is difficult to automatically create it, and the operator has to make a high-level judgment to extract it.

Further, there are problems in that it takes a long time to perform this operation and that setting errors are likely to occur.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a method for creating standard data for a board-mounted component recognition apparatus, which solves the above-mentioned problems and can suitably create standard data.

Composition of the Invention The method for creating standard data of the board-mounted component recognition device of the present invention recognizes the mounting state of components on the board to be inspected by referring to an image of the board to be inspected obtained by a camera means and standard data. In a method for creating standard data in a board-mounted component recognition device, an ideal pattern representing a properly mounted component is formed by a display that can be clearly detected by the camera means, the ideal pattern is imaged by the camera means, and the ideal pattern is imaged by the camera means. The configuration is characterized in that the standard data is created based on imaging data.

EXAMPLES Hereinafter, the present invention will be explained in more detail based on examples shown in the drawings. Here, FIG. 1 is a block diagram of a board-mounted component recognition device capable of implementing the method of the present invention, FIG. 2 is a perspective view of an example of an ideal pattern board for implementing the method of the present invention, and FIG. FIG. 2 is an exemplary diagram of an image display obtained from the ideal pattern board shown in FIG.
The figure is an explanatory diagram of the principle of automatic window creation processing, and FIG. 6 is an exemplary diagram of the obtained window. Note that the present invention is not limited to the embodiments shown in the figures.

The board mounted component recognition device l shown in FIG. 1 includes a camera 922, an image processing section 31, an image memory 4. It consists of an arithmetic control section 5, a standard data memory 6, an image standard section 7, and an input operation section 8. The board to be inspected is captured by a camera 2, and the image processing section 3 performs binarization image processing and grayscale image processing. The obtained image data is transferred to i! The arithmetic control section 5 refers to the standard data stored in the i-image memory 4 and the standard data memory 6.
recognizes the mounting state of the component from the image data and displays the result on the image display section 7. The input operation section 8 is for an operator to operate the operation.

When creating standard data, instead of showing the board on which components are mounted (Fig. 8) to the camera 2 as in the past, for example, the 21st! An ideal pattern substrate pt as shown in I is shown to the camera 2.

This ideal pattern board P has components A, B, and C.

On the board P on which D is mounted, each component A, B, C.

The surface of D is painted in a color (for example, white) that can be clearly distinguished from the surface of substrate P.

In such an ideal pattern board pt, there is no variation in shape, gloss, color, etc. of individual parts, so even if each part is imaged all at once, each part A- All of the images a w d of D can be obtained satisfactorily.

Therefore, if images as shown in FIG. 3 are displayed on the image display section 7, the operator can easily retrieve standard data such as centers C1 to Cd and windows W to W- as shown in FIG. 10 from each image a w d. can be extracted, reducing operation time and preventing setting errors.

The above-mentioned ideal pattern board Pt is an example of the ideal pattern according to the present invention, and instead of this, an ideal pattern diagram sheet etc. that displays figures of the same shape as the parts in a color that can be clearly distinguished from the ground color may be used. In short, if you can show an ideal pattern created so that images of each part can be clearly obtained in a closed area and image data can be clearly separated from each other, the ease of creation will be improved. 1 work efficiency can be improved by 1M.

By the way, conventionally, for example, image data a as shown in FIG.
-dl, it was difficult to automate the process, and standard data was extracted at the discretion of the operator. However, since good image data as shown in FIG. 3 can be obtained by showing the ideal pattern, it is also possible to automatically create standard data. 1
, it has become possible to automatically create such standard data.

The standard data automatic creation function shown in FIG. 4 will be explained below according to the operation of the board-mounted component recognition device 1, but for the sake of explanation, only the image g of one component shown in FIG. 5 will be considered. .

First, an ideal pattern is shown to the board-mounted component recognition device 1, and the ideal pattern is read (Sl).

By reading the ideal pattern, the image g of the part is obtained as a completely closed area, so the calculation control unit 5 calculates the center of gravity Cg (X mark, Yw) from the image g (S2
), such calculation of the center of gravity can be easily obtained by a conventionally known method.

Next, the calculation control unit 5 calculates the starting point and ending point x, x, y, y in the X direction and Y direction from the image g (33).
.

Next, a rectangular temporary window W1' surrounding the image g is extracted (34). This temporary window W1' is a window unit of the form of nii pixels x m pixels, as shown in FIG.
It has a configuration in which N windows are collected in the direction and M windows are collected in the Y direction, and the coordinates (Xwt, YwL) of the starting end of each window unit are calculated by the following equation.

X, Knee
"Yt"' (1+!4) ・" ■However, 1-...,-2,-1,0,1,2,...x
s n < x w = < X eY , m <
Y w L 〈 (window unit) (S
5).

Thus, a window W as shown in FIG. 6 is obtained, and this window W1 and the center of gravity C1 are stored as standard data in the standard data memory 6 (S6).

Once the standard data has been created, the actual inspection process begins.

As can be understood from the above explanation, standard data can be automatically created by using this board-mounted component recognition device 1 and by showing a clearly recognizable ideal pattern to the camera 2, making it extremely easy to create. This reduces the time required and also prevents setting errors.

Furthermore, as mentioned above, since the window is configured as a set of window units of n pixels x m pixels, the software required to transfer the data in the window when recognizing a mounted component is a set of n pixels x m pixels. It is sufficient to have a routine that targets each window, and it also has the effect of making it possible to reduce the program size.

In the actual inspection process, the above window is used to distinguish the image data for each component, perform gradation processing on each component, and check the tgu of the mounted state. k can be suitably performed.

Effects of the Invention According to the present invention, standard data is created in a board-mounted component recognition device that recognizes the mounting state of components on a board to be inspected by referring to an image of the board to be inspected obtained by a camera means and the standard data. In the method, an ideal pattern representing a properly mounted component is formed by a clearly detectable display by the camera means, the ideal pattern is imaged by the camera means, and the standard data is created based on the imaged data. A method for creating standard data for a board-mounted component recognition device is provided, which is characterized by performing the following: This reduces operating time and allows creation to be performed without setting errors.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a board-mounted component recognition device capable of implementing the method of the present invention, FIG. 2 is a perspective view of an example of an ideal pattern board for implementing the method of the present invention, and FIG. 31! l is second
An illustrative diagram of an image obtained from the ideal pattern substrate shown in the figure,
FIG. 4 is a flowchart of standard data automatic creation processing of the board mounted component recognition device shown in FIG. 1, FIG. 5 is a diagram explaining the principle of window automatic creation processing, FIG. The figure is a block diagram of an example of a conventional board-mounted component recognition device, FIG. 8 is a perspective view of an example of a board on which components are mounted, FIG. 9 is an exemplary diagram of an image obtained from the board shown in FIG. The figure is an exemplary diagram of standard data for the board shown in FIG. 8. (Explanation of symbols) 1... Board mounted component recognition device 2... Camera 3... Image processing unit 4... Image memory 5... Arithmetic control unit 6... Standard data memory 7... M image display section 8...Input operation section P...Ideal pattern substrates A, B, C, D...Parts a, b, c, d...Image data of parts Wl'...Temporary Window W... Window C... Center of gravity P... Board.

Claims (1)

[Claims] 1. In a method for creating standard data in a board mounted component recognition device that recognizes the mounting state of components on a board to be inspected by referring to an image of the board to be inspected obtained by a camera and standard data, The present invention is characterized in that an ideal pattern representing a part that has been removed is formed by a display that can be clearly detected by the camera means, the ideal pattern is imaged by the camera means, and the standard data is created based on this imaged data. How to create standard data for board mounted component recognition equipment.