阅读说明：本技术 一种电子器件字符缺陷检测装置和方法 (Character defect detection device and method for electronic device ) 是由 林斌 韩晨思 赵淦 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种电子器件字符缺陷检测装置和方法,包括：产品输送机构和位于产品输送机构上方的图像采集机构；所述产品输送机构包括：第一皮带模组、用于驱动所述第一皮带模组在Y轴方向运动的第一电机,所述第一皮带模组上固定有用于放置电子器件的载具板；所述图像采集机构包括：第二皮带模组、用于驱动所述第二皮带模组在X轴方向运动的第二电机,所述第二皮带模组上固定有滑板；所述滑板侧边垂直固定有相机底板,所述相机底板上固定有用于采集电子器件图像的相机。本发明效率高与稳定性好。(The invention discloses a character defect detection device and method for an electronic device, which comprises the following steps: the device comprises a product conveying mechanism and an image acquisition mechanism positioned above the product conveying mechanism; the product conveying mechanism includes: the first belt module is used for driving the first belt module to move in the Y-axis direction, and a carrier plate for placing an electronic device is fixed on the first belt module; the image acquisition mechanism includes: the second belt module is used for driving the second belt module to move in the X-axis direction, and a sliding plate is fixed on the second belt module; a camera bottom plate is vertically fixed on the side edge of the sliding plate, and a camera used for collecting images of the electronic device is fixed on the camera bottom plate. The invention has high efficiency and good stability.)

1. An electronic device character defect detecting device, characterized by: the method comprises the following steps: the system comprises a product conveying mechanism (18), an image acquisition mechanism and an industrial personal computer, wherein the image acquisition mechanism and the industrial personal computer are positioned above the product conveying mechanism;

the product conveying mechanism (18) comprises: the device comprises a first belt module (15) and a first motor (12) for driving the first belt module (15) to move in the Y-axis direction, wherein a carrier plate (14) for placing an electronic device is fixed on the first belt module (15);

the image acquisition mechanism includes: the second belt module (3) and a second motor (1) are used for driving the second belt module (3) to move in the X-axis direction, and a sliding plate (2) is fixed on the second belt module (3); a camera bottom plate (6) is vertically fixed on the side edge of the sliding plate (2), and a camera (5) for acquiring an image of an electronic device is fixed on the camera bottom plate (6);

the industrial personal computer is used for controlling the start and stop of the first motor and the second motor and detecting defects.

2. The apparatus of claim 1, wherein: the detection device further comprises: the vacuum cover plate (13), carrier board (14) middle part indent forms the cavity that is used for placing electronic device with the vacuum cover plate that covers on the carrier board, carrier board (14) are connected with the trachea, the trachea is connected with vacuum generator.

3. The apparatus of claim 2, wherein: the product conveying mechanism further comprises an air pipe drag chain (8), and the air pipe is located in the air pipe drag chain (8).

4. The apparatus of claim 1, wherein: the side of carrier board (14) sets up the location strip, the location strip forms L shape flange.

5. The apparatus of claim 1, wherein: the image acquisition mechanism further comprises: an annular light source (4) coaxial with and fixed below the camera.

6. The apparatus of claim 5, wherein: the annular light source (4) is a blue annular light source.

7. The apparatus of claim 1, wherein: the detection device further comprises a frame housing, one side of the frame housing is a turnover cover (16), the product conveying mechanism is fixed at the bottom of the inner side of the frame housing, and the image acquisition mechanism is fixed above the inner side of the frame housing.

8. The apparatus of claim 7, wherein: and a display is fixed on the flip cover (16).

9. A character defect detection method for an electronic device is characterized by comprising the following steps: the method comprises the following steps:

acquiring a picture of an acquisition electronic device;

carrying out gray processing and morphological processing on the collected picture, calculating a difference value with the picture template, and if the difference value is greater than a set threshold value, determining that a defective product is detected;

and displaying the defective product picture and the position of the defect.

10. The method of claim 9, wherein the character defect detection method comprises: capturing a picture of an electronic device, comprising:

the electronic device is placed on the carrier plate in a whole, and the camera and/or the position of the electronic device are moved by controlling motors in the X, Y axis direction respectively to acquire pictures of the electronic device.

Technical Field

The invention relates to the technical field of defect detection, in particular to a device and a method for detecting character defects of an electronic device.

Background

In the modern electronic information technology era, the internet technology is rapidly developed, and the demand for electronic products is greatly increased. The related parts are used as the most basic elements for transmitting and processing information of the bottom layer, and generally have the characteristics of small volume, light weight, thinness, batch production and the like, so that the production efficiency is quite high in the conventional automatic batch production. The actual manufacturing process cannot necessarily reach the yield of one hundred percent, so the quality detection of the electronic device becomes a crucial part.

The defects are of various types, such as solder stripping, missing welding, two-dimensional code bar code spraying error and the like. Very typical and common of these is the character printing defect on the surface of the circuit board. When characters such as related dates and product models are printed on the surface of a circuit board, phenomena such as missing printing, wrong printing and the like often occur. Once a character defect is not found and flows into the next process, the character defect has irreparable influence on the subsequent processing technology and assembly, and has considerable impact on word-of-business praise of processing manufacturers.

Most of the detection technologies in the current production line only rely on direct observation and judgment by naked eyes, and for some undersized characters, the detection is only carried out by optical instruments such as a microscope, and finally, human eyes receive image information and process the image information by a brain. Under such a huge market environment, an automatic detection device for character defects of electronic devices is needed to improve the detection efficiency and accuracy. Considering that circuit boards of different models have fonts of different styles and different thicknesses, and the frequency of updating and upgrading the models in a production line is very high, challenges are brought to a defect detection device and a related method.

The traditional manual method has high working strength and low efficiency, and the accuracy rate is difficult to ensure stability under the long-time working condition due to human eye fatigue.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a character defect detection device and method for an electronic device, and solves the problems of low efficiency and low accuracy rate of the conventional defect detection of the electronic device depending on manpower.

In order to achieve the above purpose, the invention adopts the following technical scheme: an electronic device character defect detecting apparatus comprising: the system comprises a product conveying mechanism, an image acquisition mechanism and an industrial personal computer, wherein the image acquisition mechanism and the industrial personal computer are positioned above the product conveying mechanism;

the product conveying mechanism includes: the first belt module is used for driving the first belt module to move in the Y-axis direction, and a carrier plate for placing an electronic device is fixed on the first belt module;

the image acquisition mechanism includes: the second belt module is used for driving the second belt module to move in the X-axis direction, and a sliding plate is fixed on the second belt module; a camera bottom plate is vertically fixed on the side edge of the sliding plate, and a camera for collecting images of the electronic device is fixed on the camera bottom plate;

the industrial personal computer is used for controlling the start and stop of the first motor and the second motor and detecting defects.

Further, the detection device further comprises: the vacuum cover plate is concave in the middle of the carrier plate, a cavity for placing an electronic device is formed by the vacuum cover plate and the carrier plate, the cavity is connected with an air pipe, and the air pipe is connected with a vacuum generator.

Further, the product conveying mechanism further comprises an air pipe drag chain, and the air pipe is located in the air pipe drag chain.

Furthermore, the side of carrier board sets up the location strip, the location strip forms L shape flange.

Further, the image capturing mechanism further comprises: an annular light source coaxial with and fixed below the camera.

Further, the annular light source is a blue annular light source.

Furthermore, the detection device further comprises a frame housing, one side of the frame housing is a flip cover, the product conveying mechanism is fixed at the bottom of the inner side of the frame housing, and the image acquisition mechanism is fixed above the inner side of the frame housing.

Further, a display is fixed on the flip cover.

A character defect detection method for an electronic device comprises the following steps:

the industrial personal computer acquires the acquired picture of the electronic device;

the industrial personal computer performs gray processing and morphological processing on the acquired picture, performs difference value calculation with the picture template, and if the difference value is greater than a set threshold value, the industrial personal computer determines that a defective product is detected;

and the industrial personal computer sends the defective product picture and the position of the defect to the display for displaying.

Further, acquiring a picture of the electronic device includes:

the electronic device is placed on the carrier plate in a whole, and the picture of the electronic device is collected by controlling the motor in the XY axis direction.

The invention achieves the following beneficial effects: the invention is suitable for quickly detecting and marking surface defect characters in a circuit board production line, realizes the shooting of all pictures of the to-be-detected product in an xy plane by controlling the motion of the motors in the product conveying mechanism and the image acquisition mechanism, processes the pictures and marks defects by a simple and efficient image processing technology, and has high efficiency and stability which are not possessed by manpower. The method is also suitable for detecting the defects of bar codes, trademark logos and the like on the surface of the electronic component.

Drawings

FIG. 1 is a schematic view of an image acquisition mechanism in an embodiment of the invention;

fig. 2 is a schematic view of a product conveying mechanism in an embodiment of the present invention.

Fig. 3 is a schematic front view of a detection apparatus in an embodiment of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Example 1:

as shown in fig. 1 to 3, an apparatus for detecting character defects of an electronic device includes: the device comprises a product conveying mechanism, an image acquisition mechanism and an industrial personal computer, wherein the image acquisition mechanism and the industrial personal computer are positioned above the product conveying mechanism;

the product conveying mechanism 18 includes: the first belt module 15 and the first motor 12 are used for driving the first belt module 15 to move in the Y-axis direction, and a carrier plate 14 for placing an electronic device is fixed on the first belt module 15;

the product conveying mechanism is placed on the fixed table 7;

the circuit board samples to be detected are loaded and taken by respective containers and are placed on the carrier plate 14 by operators;

further, to plastic envelope electron device product, its quality is frivolous and easy crooked, and for avoiding influencing the effect of shooing and then cause the interference to detecting, can take carrier plate 14 "L" shape flange (L shape is constituteed with long limit location strip 11 to minor face location strip 10) location and the adsorbed mode of negative pressure to accomplish the work piece location and fix, concrete structure is: the detection device also comprises a vacuum cover plate 13, the middle part of the carrier plate 14 is concave, and the vacuum cover plate 13 covered on the carrier plate 14 and the carrier plate together form a cavity; the carrier plate 14 is connected with an air pipe, the air pipe is connected with a vacuum generator, and the air in the cavity is extracted by the vacuum generator to form negative pressure so as to adsorb the workpiece;

the product conveying mechanism further comprises an air pipe drag chain 8, and the air pipe is positioned in the air pipe drag chain 8;

positioning strips are arranged on the side edges of the carrier plates 14; more specifically, the carrier plate 14 is rectangular, and the positioning strips comprise at least one short-side positioning strip 10 and one long-side positioning strip 11 to form an L-shaped rib;

furthermore, a plurality of circuit holes 9 for a circuit to pass through are arranged on the fixed table 7;

the motion of the first motor is controlled through the industrial personal computer 6;

the image acquisition mechanism includes: the second belt module 3 and a second motor 1 are used for driving the second belt module 3 to move in the X-axis direction, and a sliding plate 2 is fixed on the second belt module 3; a camera bottom plate 6 is vertically fixed on the side edge of the sliding plate 2, and a camera 5 for collecting images of electronic devices is fixed on the camera bottom plate 6;

further, the method also comprises the following steps: the annular light source 4 is coaxially fixed below the camera 5, and a lens of the camera 5 penetrates through the annular light source 4; and the image data shot by the camera is sent to the industrial personal computer 6 through the network cable.

The annular light source 4 is a blue annular light source, and most of the circuit boards are brownish yellow, and dark brown lines and white characters to be detected are printed on the circuit boards. If a white surface light source is selected for illumination, the target character is easy to be confused with the background. Through actual test and image RGB channel analysis, the blue annular light source can obtain the best image effect.

The motion of the second motor is controlled by the industrial personal computer 6;

the detection device also comprises a frame cover, wherein the frame cover is welded through a metal plate, one side of the frame cover is a turnover cover 16, the turnover angle of the turnover cover 16 is 130 degrees, the product conveying mechanism is fixed at the bottom of the inner side of the frame cover, the image acquisition mechanism is fixed above the inner side of the frame cover, and a display 17 is fixed on the turnover cover 16 and used for displaying image acquisition contents and character defect positions;

the detection product is mostly a whole circuit board array, and the size span is large. In order to meet various detection requirements, the camera needs to move and take pictures for multiple times to cover a detection range, the character detection has no depth of field requirement, and the motion mechanism only needs two directions of freedom degrees. Through design, can distribute to product conveying mechanism y direction degree of freedom respectively, image acquisition mechanism x direction degree of freedom.

Because circuit board devices are mostly stored by plastic package materials, if the circuit board devices are fixed on a carrier plate only by gravity or mechanical clamps, the phenomena of edge warping, air bubbles, light reflection and the like are easily generated to interfere with image and processing. As an improvement, a product conveying mechanism adopts a vacuum adsorption positioning mode.

The industrial personal computer is used for controlling the start and stop of the first motor and the second motor and detecting defects.

Example 2:

a character defect detection method for an electronic device comprises the following steps:

step 1, an industrial personal computer acquires a collected picture of an electronic device; the method comprises the following steps:

controlling the movement of the first motor and the second motor to enable all the components to be located at initial positions, placing the electronic device on the carrier plate 14 in a whole piece, and positioning the electronic device through the L-shaped flanges; acquiring pictures of the electronic device by controlling the first motor and the second motor;

if the plastic package product is the plastic package product, after the plastic package product is positioned through the L-shaped flanges, the vacuum cover plate is placed on the plastic package product, and the cavity is vacuumized through the vacuum generator to play a role in adsorption and fixation.

Step 2, carrying out gray processing and morphological processing on the collected picture, calculating a difference value between the collected picture and a picture template in a picture library, and if the difference value is greater than a set threshold value, determining that a defective product is detected;

the acquisition method of the picture template comprises the following steps: collecting a non-defective product picture, manually selecting a required detection area by an operator to generate a template for matching, and smearing out an uninteresting area to avoid unnecessary information;

and 3, sending the position information of the defective product to a display for displaying.

If the defects exist in the current detection sample, the currently collected picture has an NG prompt in the display, and a specific position is marked in the real-time image, so that an operator can conveniently observe, review and take down the picture.

The method is suitable for quickly detecting and marking the surface defect characters in the circuit board production line. Send the module among signal control product conveying mechanism and the image acquisition mechanism through the industrial computer and remove, realize in the xy plane all waiting to examine the shooting of article picture to handle and mark the defect to the picture through concise, efficient image processing technique, have artifical high efficiency and the stability that does not possess. The method is also suitable for detecting the defects of bar codes, trademark logos and the like on the surface of the electronic component.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.