KR102549486B1 - Inspect and repair apparatus for printed circuit board - Google Patents

Abstract

In the present invention, a stage supporting the PCB, a carrier for sliding and transporting the PCB and passing it from one side of the stage to the other side, a first camera unit for acquiring image data by photographing the top surface of the PCB placed on the stage, and A second camera unit that acquires image data by taking a picture of the lower surface of the PCB placed thereon, and controls the first and second camera units to capture and collect image data, and to control standard image data previously stored in a data storage unit and the first and second camera units. 2Comparing the image data input from the camera unit, determining the part that needs repair or replacement according to whether or not it meets the preset criteria, and generating repair or replacement information for the part if repair or replacement is necessary as a result of the determination, An information processing unit that analyzes image data of the first camera unit to generate position values of parts requiring repair or replacement, image data collected through the first and second camera units, and repair or replacement information generated by the information processing unit A display unit for displaying, a laser pointer emitting visible light of a low-power laser beam by aiming at the PCB corresponding to the position value generated by the information processing unit, and a laser pointer installed above the stage to be movable in three axes Disclosed is a PCB inspection and repair device including a magnifying glass that enlarges and shows a spot indicated by a pointer.

Description

PCB inspection and repair apparatus for PCB recycling {Inspect and repair apparatus for printed circuit board}

The present invention relates to a PCB inspection and repair device, and more particularly, to a PCB inspection and repair device for recycling a PCB, which detects a defective part of a printed circuit board (PCB) and performs repair work easily and conveniently so that it can be reused. it's about

A printed circuit board (PCB) is a combination of electronic circuits by soldering and fixing electronic components such as integrated circuits, resistors, and capacitors on the surface of a printed wiring board, and connecting the components with wires to form an electronic circuit. ) or malfunctions or malfunctions due to defects or defects are repaired and reused.

For example, in the manufacturing process of a printed circuit board, if soldering is not properly performed and a defect or defect occurs due to a cold soldering phenomenon in which solder melts and falls at a relatively low temperature when the product is subjected to heat or shock, a soldering machine or the like is used to repair it.

In particular, in the case of printed circuit boards applied to measuring instruments, etc., since most of them are produced in small quantities, they are reused after being repaired in case of failure to reduce price and management costs.

On the other hand, the printed circuit board improves the production yield by minimizing defective products by automatically inspecting the pattern defect of the circuit using an optical method using a camera, such as an automatic optical inspection machine (AOI) during the manufacturing process.

This automatic optical inspection machine uses the difference between a standard image without defects or defects and an inspection image input from a camera, and classifies the image into four types of segments based on shape, such as rectangle, circle, thin line, and thick line. How to apply, etc.

However, in the prior art, there is a problem in that work efficiency and productivity are considerably lowered because the process of inspecting defects or defects of the printed circuit board and the process of repairing the resulting failure are performed separately in separate facilities.

The background art or prior art described above herein is information possessed by the present inventor or acquired in the process of deriving and completing the present invention, which is helpful in understanding the technical significance of the present invention and is useful for prior art search and examination. However, prior to the filing of the present invention, it is revealed that it does not mean a technique that is generally known and widely used in the art to which the invention belongs.

KR 10-1553303 B1 (2015. 09. 09) KR 10-0813291 B1 (2008. 03. 06) KR 10-1420312 B1 (2014. 07. 10)

Therefore, the present inventor comprehensively considers the above-mentioned matters and at the same time, in order to solve the technical limitations and problems of the existing printed circuit board inspection and repair technology, the present inventors continuously manufacture the printed circuit board (PCB) in one stage. Dedicated efforts have been made to develop a PCB inspection and repair device for PCB recycling with a new structure that can accurately detect faulty parts such as defects and defects, and repair them easily and conveniently to improve work efficiency and productivity. As a result of continuous research, the present invention was created.

Therefore, the technical problem and object to be solved by the present invention is to provide a PCB inspection and repair device that accurately detects and conveniently repairs a defective part of a printed circuit board.

Here, the technical problems and objects to be solved by the present invention are not limited to the technical problems and objects mentioned above, and other technical problems and objects that are not mentioned are the general knowledge in the technical field to which the present invention belongs from the description below. Those who have it will be able to clearly understand.

Specific means according to an embodiment of the present invention for effectively achieving a specific technical purpose while embodying a new idea for solving the technical problem of the present invention as described above is a stage supporting a PCB, sliding and transferring the PCB A carrier that passes from one side of the stage to the other side, a first camera unit that acquires image data by photographing the upper surface of the PCB placed on the stage, and a second camera unit that acquires image data by photographing the lower surface of the PCB placed on the stage The image data input from the camera unit and the first and second camera units is compared with the standard image data previously stored in the data storage unit, and a part that needs to be repaired or replaced is determined according to whether or not a preset criterion is satisfied, and the determination is made. As a result, when repair or replacement is required, an information processing unit that generates repair or replacement information for the corresponding part, analyzes the image data of the first camera unit, and generates a location value of the part that needs to be repaired or replaced, and the first and second camera units. A laser that emits visible light of a low-power laser beam by aiming at the PCB part corresponding to the position value generated by the display unit and the display unit that displays the image data collected through the information processing unit and the repair or replacement information generated by the information processing unit. We present a PCB inspection and repair device for PCB recycling, characterized by adopting a pointer and a magnifying glass installed to be movable in three axes on the upper side of the stage and magnifying the spot portion pointed by the laser pointer.

Accordingly, the present invention can continuously and accurately detect a failure of a printed circuit board (PCB) in one stage and repair it quickly and conveniently.

In addition, in a preferred embodiment of the present invention, a lighting unit for brightly illuminating the PCB placed on the stage and a control unit for photographing and collecting image data of the first and second camera units and controlling the display unit, the laser pointer, and the lighting unit, respectively Further, the laser pointer and the magnifying glass are mounted on a 3-axis gantry loader that moves forward, backward, left, right and up and down under the control of the control unit based on the position value generated by the information processing unit. In addition, when a problem occurs on the back side during real-time work on the repair part through the second camera unit, the operator can recognize it through the image signal value.

In addition, a preferred embodiment of the present invention further comprises a third camera unit for obtaining image data by photographing the upper surface of the PCB passing through the stage from the upper side of the carrier, and the information processing unit receives input from the third camera unit. Comparing the image data with the standard image data pre-stored in the data storage unit to determine whether or not the repair of the PCB is completed according to whether a preset criterion is satisfied, and transmits the result to the display unit under the control of the control unit. there is.

In addition, a preferred embodiment of the present invention further includes a hand support jig for supporting a worker's hand on the outside of the stage, and a tool support for supporting a work tool is further provided on one side of the hand support jig.

In addition, a preferred embodiment of the present invention, a protective cap for protecting the operator's face is coupled to the magnifying glass, further comprising an eye protection film plate for protecting the operator's eyes during welding work on the magnifying glass, the eye protection film The plate may be rotatably coupled to one side of the magnifying glass through a hinge.

According to the technical idea and embodiment of the present invention, on which a unique solution is based to solve the above technical problems, defective and cut damaged parts or connection parts of a printed circuit board (PCB) continuously in one stage. It is possible to quickly and accurately detect faulty parts such as damaged wiring, and to easily and conveniently repair or replace damaged parts using tools such as a soldering iron, thereby improving the convenience and work efficiency of inspection and repair.

In addition, in the process of repairing a printed circuit board (PCB) or replacing damaged parts, the lower surface of the printed circuit board (PCB) can be checked in real time, thereby reducing work time and preventing work defects such as incorrect connections. can do.

Here, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a front view schematically showing a PCB inspection and repair device for PCB recycling according to an embodiment of the present invention.
2 is a side view schematically showing a PCB inspection and repair device for PCB recycling according to an embodiment of the present invention.
3 is a schematic front view of a local part of a PCB inspection and repair device for PCB recycling according to an embodiment of the present invention.
4 is a block diagram schematically showing a PCB inspection and repair device for PCB recycling according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

Prior to this, the terms to be described below are defined in consideration of functions in the present invention, which specifies that they should be interpreted as concepts consistent with the technical spirit of the present invention and meanings commonly used or commonly recognized in the art.

In addition, if it is determined that a detailed description of a known function or configuration related to the present invention may obscure the gist of the present invention, the detailed description will be omitted.

The accompanying drawings may be exaggerated or simplified in part to help explain and understand the configuration and operation of the technology, and each component on the drawings does not exactly match the actual size and shape. reveal

In addition, in this specification, the term and / or is meant to include a combination of a plurality of related items described or any item among a plurality of related items described, and when a certain part includes a certain component, this is particularly the opposite. Unless otherwise stated, it means that other components may be further included rather than excluding other components.

That is, terms such as 'include' or 'have' described in this specification mean that a feature, number, step, process, operation, component, part, or combination thereof exists, but one or the presence or addition of more other features or numbers, steps, processes, operations, components, parts, or combinations thereof.

On the other hand, the meaning of "unit" and "unit" used in the present invention means a module type that plays a role or unit that processes at least one function or a certain operation for the purpose of the system, which is hardware or software or hardware and It can be implemented as a means through software combination, etc., or as a device or assembly capable of performing an independent operation.

In addition, terms such as top, bottom, top, bottom, or top, bottom, top, bottom, front and rear, left and right used in the present invention are used for convenience to distinguish the relative positions of each component. For example, an upper part in the drawing may be named or referred to as an upper part, a lower part may be named or referred to as a lower part, a longitudinal direction may be named or referred to as a front-back direction, and a width direction may be named or referred to as a left-right direction.

In addition, terms such as first and second used in the present invention may be used to describe various elements. That is, terms such as first and second may be used for the purpose of distinguishing one component from another.

[Example]

As shown in FIGS. 1 to 4, the main elements constituting the PCB inspection and repair apparatus for PCB recycling according to an embodiment of the present invention include a stage 10, a first camera unit 20, and a second camera unit ( 30), information processing unit 40, display unit 50, laser pointer 60, magnifying glass 70, lighting unit 80, control unit 90, gantry loader 100, carrier 110 and third A camera unit 120 is included. Since the first to third camera units 20, 30, and 120 may be fixed to a common supporting means, the supporting means is not separately shown.

The stage 10 supports the PCB 1 and serves to support it so that it does not move freely.

That is, the stage 10 inserts the PCB 1 in a sliding manner and has guide grooves 11 for supporting both ends thereof.

The first camera unit 20 serves to acquire image data by photographing the upper surface of the PCB 1 placed on the stage 10 .

That is, the first camera unit 20 captures an image obtained by photographing the upper surface of the PCB 1 as a photo, extracts image data, and transmits the image data to the information processing unit 40 .

The second camera unit 30 serves to acquire image data by capturing the lower surface of the PCB 1 placed on the stage 10 .

That is, the second camera unit 30 captures an image obtained by photographing the lower surface of the PCB 1 as a photo, extracts image data, and transmits it to the information processing unit 40 .

Here, a CCD camera including an image sensor and an image processing module may be applied to the first and second camera units 20 and 30 .

That is, the first and second camera units 20 and 30 may process a still image or moving image obtained by an image sensor (eg, CMOS or CCD), and may process a still image or moving image obtained through the image sensor. may be processed in the image processing module to extract necessary information, and transmit the extracted information to the information processing unit 40.

Accordingly, the first camera unit 20 can obtain information on the part to be repaired in the PCB 1 through the output image, and the second camera unit 30 can obtain problems on the back side during real-time work on the repaired part. When occurs, the operator can recognize it through the image signal value.

The information processing unit 40 compares the image data input from the first and second camera units 20 and 30 with the standard image data of the PCB 1 previously stored in the data storage unit 41 to satisfy a preset standard. Depending on whether or not the PCB 1 needs to be repaired or replaced, it is determined.

Here, the data storage unit 41 stores standard image data of the PCB 1 as well as component-related information and coordinate value data necessary for generating position values.

In addition, in the data storage unit 41, shape characteristic information and image information of good capacitors are stored in advance for each type of capacitor.

For example, the information processing unit 40 compares good capacitor image data corresponding to a specific capacitor of the image data input from the first camera unit 20 with the capacitor image of the image data input from the first camera unit 20. A difference image may be acquired, and if the difference image is greater than or equal to a preset error, it may be determined to be defective, and if the difference image is less than a preset error, it may be determined to be normal.

In addition, the information processing unit 40 calculates the image data acquired from the first to third camera units 20, 30, and 120 through mathematical processing of Fourier transform and compares them with previously input reference values. By doing so, it is possible to determine whether or not there is an abnormality in the PCB 1 by comparing and analyzing image data using various image analysis techniques, such as determining a defect of the PCB 1 .

In addition, the information processing unit 40 generates repair or replacement information for the corresponding part if repair or replacement is necessary as a result of the determination, and analyzes image data of the first camera unit 20 to generate a position value of the part that needs repair or replacement. do.

In addition, the information processing unit 40 compares the image data input from the third camera unit 120 with the standard image data of the PCB 1 stored in advance in the data storage unit 41, and determines whether or not the PCB meets a preset standard. Determine whether or not the repair of (1) has been completed.

On the other hand, the information processing unit 40 includes vision analysis software that analyzes image data captured by the first to third camera units 20, 30, and 120 and software that generates a position value of a specific part in the image data. can be mounted.

The display unit 50 includes image data collected from the first to third camera units 20, 30, and 120, repair or replacement information generated by the information processing unit 40, and repair or replacement in the PCB 1. Receives and displays the location value of the required part. In addition, a manual related to repair or replacement is displayed on the display unit 50 so that even non-skilled personnel can inspect and repair the PCB.

Here, the display unit 50 may include a liquid crystal display (LCD) monitor that displays menus or image data necessary for control.

The laser pointer 60 aims at a specific part of the upper surface of the PCB 1 corresponding to the position value generated by the information processing unit 40 and emits visible light of a low-power laser beam.

Also, the laser pointer 60 is installed on the upper side of the stage 10 to be movable in three axial directions.

The magnifying glass 70 enlarges and clearly shows the spot portion indicated by the laser pointer 60 .

Through this, the operator can easily use a work tool for a part to be repaired or replaced by securing a field of view through the magnifying glass 70 .

Further, the magnifying glass 70 is installed above the stage 10 to be movable in three axial directions.

A protective cap for protecting a worker's face may be coupled to the magnifying glass 70 .

The protective cap, although not shown, can be detachably coupled to the magnifying glass 70 through a detachable means, and is preferably formed in a size capable of protecting the operator's face surface. In addition, the magnifying glass 70 may be further provided with an eye protection film plate that protects the operator's eyes during the welding operation, and the eye protection film plate is coupled to one side of the magnifying glass 70 through a hinge and rotates as needed you can make it available for use.

The lighting unit 80 serves to brightly illuminate the PCB 1 placed on the stage 10 .

Here, the lighting unit 80 consists of several LED lamps and irradiates the PCB 1 with light having different colors and different wavelength ranges at different angles, thereby accurately identifying the quality and shape of the soldering area of the PCB 1 It may be easy to compare and determine image data obtained from the first and third camera units 20 and 120.

The control unit 90 controls photographing and image data collection of the first to third camera units 20, 30, and 120, respectively, and transmits a result of the determination of the information processing unit 40 to the display unit 50.

That is, the control unit 90 controls image data collected through the first to third camera units 20, 30, and 120, repair or replacement information generated by the information processing unit 40, and repair in the PCB 1. Alternatively, the position value of the part requiring replacement is transmitted to the display unit 50 .

Here, the controller 90 may be implemented as an industrial PC (Personal Computer), and is a Programmable Logic Controller (PLC) for controlling the movement of the gantry loader 100 in the three-axis directions of the gantry loader 100 using xyz coordinate values. can include

In addition, the control unit 90 may be equipped with motion control software that controls lighting and turning off of the lighting unit 80 and precise movement of the gantry loader 100.

The gantry loader 100 is equipped with a laser pointer 60 and a magnifying glass 70 and moves forward and backward from the upper side of the stage 10 under the control of the control unit 90 based on the position value generated by the information processing unit 40. It serves to move in the left and right and up and down 3-axis directions.

For example, the gantry loader 100 includes a linear motor and a drive unit that reciprocate the laser pointer 60 and the magnifying glass 70 in the x-axis direction, a linear motor and drive unit that reciprocate the laser pointer 60 and the magnifying glass 70 in the y-axis direction, and a z-axis direction. It may include a linear motor and a driving unit for reciprocating movement.

The carrier 110 serves to slide and transfer the PCB 1 on both sides of the stage 10 .

Here, the carrier 110 receives the PCBs 1 one by one from a worker or other adjacent conveyors while the belt moves back and forth in an infinite orbit by the driving of an electric motor operated according to the control signal of the control unit 90 and transports them between a certain distance. It can be applied by adopting an electric belt conveyor that

The third camera unit 120 serves to acquire image data by capturing the upper surface of the PCB 1 passing through the stage 10 from the upper side of the carrier 110 .

That is, the third camera unit 120 captures an image obtained by photographing the upper surface of the PCB 1 as a picture to confirm that the PCB 1 has been repaired normally, extracts image data, and transmits the image data to the information processing unit 40. send to

Here, the third camera unit 120 may be a CCD camera including an image sensor and an image processing module.

That is, the third camera unit 120 may process a still image or moving image obtained by an image sensor (eg, CMOS or CCD), and process the still image or moving image obtained through the image sensor in an image processing module. Thus, necessary information can be extracted, and the extracted information can be transmitted to the information processing unit 40.

The PCB inspection and repair device according to the embodiment of the present invention configured as described above can quickly and accurately detect faulty parts such as damaged parts, defective connections, and cut wires of the PCB 1 placed on the stage 10, and A laser pointer 60 and a magnifying glass 70 indicate and magnify a part to be repaired or replaced, and a tool such as a soldering iron can be used to easily and conveniently repair or replace a damaged part.

As another example, a hand support jig may be separately added to any side of the stage 10 on which the PCB 1 substrate to be repaired is installed for the convenience of the operator.

The hand rest jig serves to control the operator's hand from moving, and a tool support for fixing a tool may be further provided in the hand rest jig.

In this case, when repairing or replacing damaged parts on the PCB 1, workability can be improved by stable tool support together with the magnifying glass 70.

On the other hand, the present invention is not limited by the above-described embodiments (embodiment) and the accompanying drawings, and can be variously modified and applied in various ways not illustrated within the scope without departing from the technical spirit of the present invention, as well as each It is clear to those of ordinary skill in the art that the components can be widely applied by substitution of components and changes to other equivalent embodiments.

Therefore, contents related to the modification and application of the technical features of the present invention should be interpreted as being included within the technical spirit and scope of the present invention.

10: stage 11: guide home
20: first camera unit 30: second camera unit
40: information processing unit 41: data storage unit
50: display unit 60: laser pointer
70: magnifying glass 80: lighting unit
90: control unit 100: gantry loader
110: carrier 120: third camera unit

Claims (6)

A stage 10 supporting the PCB 1;
a first camera unit 20 that acquires image data by photographing the upper surface of the PCB 1 placed on the stage 10;
a second camera unit 30 for acquiring image data by photographing the lower surface of the PCB 1 placed on the stage 10;
The standard image data previously stored in the data storage unit 41 is compared with the image data input from the first and second camera units 20 and 30 through mathematical processing of Fourier Transform to set a preset standard. It is determined whether a part of the PCB (1) needs to be repaired or replaced according to whether it satisfies, and as a result of the determination, if repair or replacement is required, repair or replacement information is generated for the part, and the first camera unit 20 an information processing unit 40 that analyzes image data to generate a location value of a part that needs to be repaired or replaced;
a display unit 50 that displays image data collected through the first and second camera units 20 and 30 and repair or replacement information generated by the information processing unit 40;
a laser pointer 60 aiming at a specific part of the upper surface of the PCB 1 corresponding to the position value generated by the information processing unit 40 and emitting visible light of a low-power laser beam;
a magnifying glass (70) installed on the upper side of the stage (10) to be movable in 3-axis directions and magnifying and showing the spot portion indicated by the laser pointer (60);
a lighting unit 80 that illuminates the PCB 1 placed on the stage 10;
The first and second camera units 20 and 30 are photographed, image data collected, and the display unit 50, the laser pointer 60, and the lighting unit 80 are respectively controlled, and motion control software is mounted. control unit 90;
Carriers 110 for sliding and transporting the PCB 1 on both sides of the stage 10; and
A third camera unit 120 for obtaining image data by photographing the upper surface of the PCB 1 passing through the stage 10 from the upper side of the carrier 110;
The laser pointer 60 and the magnifying glass 70 are mounted on the gantry loader 100, and the gantry loader 100 is based on the positional value generated by the information processing unit 40 and PLC (Programmable Logic) Controller) moves in 3 axis directions from the top of the stage 10 to the front, rear, left and right and up and down, and when performing real-time work on the repair part through the second camera unit 30 If a problem occurs on the back side, the operator can recognize it through the video signal value.
The information processing unit 40 is equipped with vision analysis software that analyzes the image data, and the image data input from the third camera unit 120 and the standard image data previously stored in the data storage unit 41 are Fourier It is compared through mathematical processing of transformation (Fourier Transform) to determine whether or not the repair of the PCB 1 is completed according to whether or not a preset standard is satisfied, and the result is determined on the display unit under the control of the control unit 90. Send to (50),
A manual related to repair or replacement is displayed on the display unit 50, so that even if you are not an expert, you can inspect and repair the PCB.
On the outside of the stage 10, a hand support jig for supporting the operator's hand so that the operator's hand does not move is further provided, and a tool support for supporting a work tool is further provided on one side of the hand support jig,
A protective cap for protecting the operator's face is coupled while being detachably coupled to the magnifying glass 70,
The magnifying glass 70 further includes an eye protection film plate for protecting the operator's eyes during a soldering operation for repairing the PCB 1 or replacing damaged parts, and the eye protection film plate includes the magnifying glass 70 Is rotatably coupled to one side of the hinge through a hinge,
A PCB inspection and repair device for PCB recycling, capable of continuously detecting and repairing defective parts of the PCB (1) and determining whether or not repairs have been completed in one stage.
delete delete delete delete delete

Images