CN111102917A - Centroid detection equipment for circuit boards - Google Patents

Abstract

The present invention is a centroid detection device for a circuit board, comprising: a circuit board carrying device, which is used to carry the circuit board and transport the circuit board to a detection platform; an image capture device, which is arranged on one side of the detection platform and is used to capture the contour image of the circuit board and output the contour image; a central processing device, which is electrically connected to the image capture device and cuts the contour image into a plurality of units to form centroid calculation information, and outputs the centroid calculation information; a centroid calculation device, which is electrically connected to the central processing device and is used to receive the centroid calculation information and calculate the centroid of the circuit board. Through the design, the centroid of the circuit board can be detected without using the known contact component to make physical contact with the circuit board, thereby increasing the accuracy of the centroid detection and reducing the loss of the circuit board.

Description

Centroid detection equipment for circuit boards

technical field

The invention relates to a centroid detection device for a circuit board.

Background technique

When processing the circuit board, according to the needs of the manufacturing process, the positioning of the circuit board must be performed first, so as to facilitate the specific manufacturing process (such as a lamination process, etc.). In the positioning method of the potential plate, some people propose to locate by finding the centroid of the circuit board.

Conventionally, by using a plurality of contact components disposed on the circuit board in four directions, up, down, left, and right, to make contact with the circuit board, and detect the centroid of the circuit board through physical contact.

SUMMARY OF THE INVENTION

However, the conventional centroid detection apparatus for circuit boards has the following problems.

Because the circuit board may be thin, when the known physical contact method is used to detect the centroid of the circuit board, the thin circuit board may be deformed, and the detection result of the centroid may be inaccurate or unstable. .

In addition, if the deformation of the (thin) circuit board is too large, the situation of circuit board loss may also occur.

Therefore, it is necessary to develop a centroid detection device for a circuit board, which does not need to use a known contact component to make physical contact with the circuit board, and can also detect the centroid of the circuit board, thereby increasing the detection of the centroid. accuracy and reduce board losses.

In order to achieve the above object and other objects, the present invention provides a centroid detection device for a circuit board, comprising: a circuit board carrying device for carrying the circuit board and transporting the circuit board to a detection platform; image capture a device, which is arranged on one side of the detection platform, and is used for capturing the outline image of the circuit board and outputting the outline image; a central processing device, which is electrically connected to the image capturing device, and which The contour image is cut into complex units to become centroid calculation information, and the centroid calculation information is output; a centroid calculation device, which is electrically connected to the central processing device, is used for receiving the centroid calculation information, and Calculate the centroid of the circuit board.

In one embodiment, the central processing device cuts the contour image into plural units with the same area.

In one embodiment, the image capturing device is disposed just above the vertical center line of one side of the detection platform.

In one embodiment, the image capturing device is disposed obliquely above the vertical center line of one side of the detection platform.

In one embodiment, the centroid detection apparatus of the circuit board further includes a light-emitting device disposed on the same side of the detection platform and the image capture device.

In one embodiment, the centroid detection apparatus of the circuit board further includes a light-emitting device disposed on different sides of the detection platform and the image capture device.

In one embodiment, the circuit board carrier has at least one hole.

In an embodiment, the circuit board carrying device has at least one of the following functions: a function of translation in the xy direction, a function of rotation, and a function of up and down movement.

In one embodiment, the centroid detection device of the circuit board further includes: a back-end processing device selected from a target drilling machine, an automatic cutting and grinding line, an exposure machine, a laser drilling machine, and an automatic optical inspection (Automated Optical Inspection) , AOI), X-ray inspection machine, laser marking machine, electroplating line positioning machine, Open/Short testing machine at least any one of the group.

To sum up, the centroid detection device of the circuit board of the present invention captures the contour image of the circuit board through the image capturing device, and then processes and calculates the contour image to obtain the centroid of the circuit board. Therefore, the centroid of the circuit board can also be detected without using a known contact component to physically contact the circuit board, thereby increasing the accuracy of detecting the centroid and reducing the loss of the circuit board.

It can be seen that the centroid detection device of the circuit board of the present invention can increase the accuracy of detecting the centroid and reduce the loss of the circuit board.

Description of drawings

[Fig. 1] is a schematic diagram of the centroid detection device of the circuit board of the present invention;

2 is a schematic diagram of the image capturing device of the first embodiment capturing the outline image of the circuit board;

FIG. 3 is a schematic diagram of the image capturing device of the second embodiment capturing the outline image of the circuit board;

[ Fig. 4 ] is a schematic diagram for explaining the calculation of the centroid;

[ Fig. 5 ] is a schematic diagram for explaining the calculation of the centroid of the circuit board;

[ FIG. 6 ] is a schematic diagram of a circuit board carrying device according to an embodiment.

reference number

1 Circuit board carrier

2 Image capture device

3 Central processing unit

4 centroid computing device

5 Lighting device

11 holes

90 Detection Platform

901 first side

902 Second side

P contour image

A to C centroid calculation unit

1000 boards

theta angle

Detailed ways

In order to fully understand the purpose, features and effects of the present invention, now through the following specific embodiments, and in conjunction with the accompanying drawings, the present invention is described in detail, and the description is as follows:

First, please refer to Figure 1. FIG. 1 is a schematic diagram of a centroid detection device for a circuit board of the present invention. As shown in FIG. 1 , the centroid detection device of the circuit board of the present invention includes: a circuit board carrying device 1 , an image capturing device 2 , a central processing device 3 and a centroid calculating device 4 .

A circuit board carrying device 1 is used for carrying a circuit board 1000 . The circuit board carrying device 1 can be moved by a mechanical arm to transport the circuit board 1000 to the detection platform 90 . Preferably, the circuit board carrying device 1 can be translated, rotated or moved up and down in the xy direction by a mechanical arm. In other words, the robotic arm may be a robotic arm that can make the circuit board carrying device 1 translate, rotate, or move up and down in the xy direction, and may be a six-axis robotic arm or a three-axis robotic arm, but is not limited thereto.

Please refer to FIG. 1 and FIG. 5 at the same time. In FIG. 1 , after the circuit board carrier 1 transports the circuit board 1000 to the detection platform 90 , the image capture device 2 disposed above one side of the detection platform 90 captures the circuit board 1000 The outline image P is outputted to the central processing unit 3 electrically connected to the image capturing device 2 . After receiving the contour image P, the central processing device 3 cuts the contour image P into a plurality of centroid calculation units C, and outputs the information as centroid calculation information.

In addition, the image capturing device 2 can be, for example, a CCD (Charge Coupled Device) lens, but not limited thereto.

Next, go back to Figure 1. The centroid calculation device 4 is electrically connected to the central processing device 3 for receiving the centroid calculation information generated by the central processing device 3 and calculating the centroid of the circuit board 1000 .

As for the method of calculating the centroid of the circuit board 1000 by the centroid calculating device 4, the method of calculating the centroid by applying the area may be used, but it is not limited thereto. For example, the calculation is performed using the following mathematical formula (1).

Mathematical formula (1)

The centroid of the area:

为形心的x坐标，

为形心的y坐标。in,

is the x-coordinate of the centroid,

is the y-coordinate of the centroid.

ΣA _i is the sum of the area of each centroid calculation unit. ΣA _{i .xi} is the sum of the area of each centroid calculation unit multiplied by the x-coordinate of the center of each centroid calculation unit. ΣA _i .y _i is the sum of the area of each centroid calculation unit multiplied by the y-coordinate of the center of each centroid calculation unit.

Now take Figure 4 as an example to calculate the centroid. FIG. 4 is a schematic diagram for explaining the calculation of the centroid. First, the central processing unit 3 can cut the contour image P of FIG. 4 into two centroid calculation units A and B with the same area, and use the centroid calculation units A and B to approximate the contour image P of FIG. 4 . The area of the centroid calculation unit A is 4×2=8; the x coordinate of the center of the centroid calculation unit A is 1; the y coordinate of the center of the centroid calculation unit A is 2. In addition, the area of the centroid calculation unit B is 2×4=8; the x coordinate of the center of the centroid calculation unit B is 4; the y coordinate of the center of the centroid calculation unit A is 1.

y＝8(2)+8(1)/8+8＝1.5。因此，图4的轮廓影像P的形心坐标为(2.5，1.5)。Next, in the centroid calculation device 4, the algorithm including the mathematical formula (1) can be used to obtain

y=8(2)+8(1)/8+8=1.5. Therefore, the centroid coordinates of the contour image P in FIG. 4 are (2.5, 1.5).

Next, please refer to FIG. 5 . FIG. 5 is a schematic diagram for explaining the calculation of the centroid of the circuit board. In FIG. 5 , the central processing unit 3 can cut the contour image P of the circuit board 1000 into a plurality of centroid calculation units C with the same area, and use each centroid calculation unit C to approximate the contour image P of FIG. 5 . After that, the centroid position of the contour image P of the circuit board 1000 in FIG. 5 is calculated in the centroid calculating device 4 in the same way as the contour image P in FIG. 4 is calculated. Thereby, the centroid of the circuit board 1000 is found.

However, it should be noted that the present invention exemplifies the case of cutting the contour image P into a plurality of centroid calculation units A or B or C with the same area for the convenience of description; however, the central processing unit 3 may also Cut into a plurality of centroid calculation units with different areas. Even with a plurality of centroid calculation units having different areas, the centroid can be calculated by the above-mentioned mathematical formula (1).

Also, the functions of the central processing unit 3 and the centroid computing unit 4 can be realized by computer programs stored in a computer-readable recording medium (eg, an optical disk, a flash disk, a flash memory, a database accessible from a network, etc.). The central processing device 3 and the centroid computing device 4 are all devices capable of reading and executing the computer program.

Next, please refer to FIG. 2 . FIG. 2 is a schematic diagram when the image capturing device 2 of the first embodiment captures the outline image P of the circuit board 1000 . In FIG. 2 , a light-emitting device 5 can be disposed on the other side of the detection platform 90 , and the light-emitting device 5 emits a light source to form a photosensitive range on the circuit board 1000 , so as to increase the image capture device 2 to capture the circuit board The effect of the accuracy of the contour image P of 1000. Specifically, the image capture device 2 can be disposed just above the vertical center line of the first side 901 of the detection platform 90 , and at the same time, the image capture device 2 can be located directly above the vertical center line of the second side 902 of the detection platform 90 . A light-emitting device 5 is provided below. In addition, in a modified example, the image capturing device 2 and the light emitting device 5 are both arranged on the same side of the detection platform 90 , for example, both are arranged on the first side 901 . As for the arrangement of the image capturing device 2 and the light emitting device 5, those skilled in the art can choose as required.

In addition, the light source emitted by the light-emitting device 5 may be visible light, X-ray, infrared light, ultraviolet light, etc., but is not limited to this.

Next, please refer to FIG. 3 . FIG. 3 is a schematic diagram when the image capturing device 2 of the second embodiment captures the outline image P of the circuit board 1000 .

In FIG. 3 , the image capture device 2 is disposed just above the edge of the circuit board 1000 , that is, obliquely above the vertical line of the center of the detection platform 90 , and captures the outline image P of the circuit board 1000 at an inclined angle θ . The angle θ is not particularly limited, as long as it is an angle that enables the image capture device 2 to capture the outline image P of the entire circuit board 1000 , for example, θ is 30°, 45°, 60°. ° etc.

Also, it should be noted that because the shooting angle of the image capturing device 2 in FIG. 2 is different from that of the image capturing device 2 in FIG. 3 , the captured outline image P of the circuit board 1000 is also different. The contour image P obtained in FIG. 2 is similar to the original shape of the circuit board 1000 . For example, when the circuit board 1000 is a square, the contour image P is a square; but under the same circumstances, the contour image P obtained in FIG. 3 may be Close to a trapezoid, or even an irregular shape. However, regardless of the contour image P, the centroid can be calculated by the central processing device 3 and the centroid calculating device 4 .

Next, please refer to FIG. 6 , which is a schematic diagram of a circuit board carrying device 1 according to an embodiment. In the circuit board carrier device 1 of FIG. 6 , it includes a plurality of holes 11 . Therefore, if the air is drawn from below the circuit board carrier 1 , an attractive force will be generated from the hole 11 . Thereby, the circuit board 1000 can be more firmly supported on the circuit board supporting device 1 .

Finally, after the centroid of the circuit board 1000 is found through the centroid detection device of the circuit board 1000 of the present invention, the circuit board 1000 can be sent to the subsequent processing process for processing. In the subsequent processing process, various back-end processing devices (not shown) are used to process the circuit board 1000 .

The back-end processing device includes a target drilling machine, an automatic cutting and grinding line, an exposure machine, a laser drilling machine, an automated optical inspection (Automated Optical Inspection, AOI), an X-ray inspection machine, and a laser marking machine. Standard machine, electroplating line positioning machine, Open/Short testing machine, etc.

To sum up, the centroid detection device of the circuit board of the present invention can detect the centroid of the circuit board without using a known contact component to make physical contact with the circuit board, thereby increasing the detection shape. The accuracy of the heart and reduce the loss of the circuit board.

The present invention has been disclosed above with preferred embodiments, but those skilled in the art should understand that the embodiments are only used to describe the present invention and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to those of the embodiments should be set to be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined by the claims.

Claims (10)

1. a centroid detection device of a circuit board, is characterized in that, comprises: a circuit board carrying device, which is used for carrying the circuit board and transporting the circuit board to the detection platform; an image capturing device, which is arranged on one side of the detection platform and is used for capturing an outline image of the circuit board and outputting the outline image; a central processing device, which is electrically connected to the image capture device, receives the contour image, cuts the contour image into a plurality of centroid calculation units to obtain centroid calculation information, and outputs the centroid calculation information; A centroid calculation device, which is electrically connected to the central processing device, and used for receiving the centroid calculation information and calculating the centroid of the circuit board. 2 . The centroid detection device for a circuit board according to claim 1 , wherein the central processing device cuts the contour image into a plurality of centroid calculation units with the same area. 3 . 3 . The centroid detection device of the circuit board according to claim 1 , wherein the image capturing device is disposed just above the vertical center line of one side of the detection platform. 4 . 4 . The centroid detection device of a circuit board according to claim 1 , wherein the image capturing device is disposed at a diagonally above the vertical center line of one side of the detection platform. 5 . 5 . The centroid detection device of a circuit board according to claim 1 , further comprising a light-emitting device disposed on the same side of the detection platform as the image capture device. 6 . 6 . The centroid detection apparatus of a circuit board according to claim 1 , further comprising a light-emitting device disposed on different sides of the detection platform and the image capture device. 7 . 7 . The centroid detection device of a circuit board according to claim 1 , wherein the circuit board carrying device has at least one hole. 8 . 8. The centroid detection device for a circuit board according to any one of claims 1 to 7, wherein the circuit board carrying device has at least one of the following functions: a function of translation in xy directions, a function of rotation, The function to move up and down. 9 . The centroid detection device for a circuit board according to claim 1 , further comprising: a back-end processing device selected from a target drilling machine, an automatic cutting and grinding line, and an exposure machine. 10 . , laser drilling machine, automatic optical inspection, X-ray inspection machine, laser marking machine, electroplating line positioning machine, at least any one of the group consisting of Open/Short testing machine. 10 . The centroid detection device of a circuit board according to claim 8 , further comprising: a back-end processing device selected from a target drilling machine, an automatic cutting and grinding line, an exposure machine, and a laser drilling machine. 11 . , at least one of the group consisting of automatic optical inspection, X-ray inspection machine, laser marking machine, electroplating line positioning machine, and Open/Short testing machine.

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