KR102236670B1 - Pcba inspection device - Google Patents

Abstract

The present invention relates to a PCBA inspection device for inspecting whether a PCBA is defective, which includes: a base frame; a stage provided on the upper side of the base frame and supporting the PCBA; a transport device provided on the upper part of the stage and transporting the probe to the upper part of the PCBA; and a probe device coupled to one side of the transport device to be transported by the transport device, and measuring an electrical signal in contact with an element of the PCBA.

Description

PCBA inspection device {PCBA INSPECTION DEVICE}

The present invention relates to an inspection apparatus, and more particularly, to a PCBA inspection apparatus for inspecting the defect of the PCBA.

Electronic devices are generally operated by supplying power to a printed circuit board assembly (PCBA) on which an electronic device is mounted, and the electrical characteristics of the PCBA can be inspected only after the manufacturing process is completed. The electronic device must be stably attached to the PCBA, but since the electronic device is electrically coupled to the PCBA by a soldering process or the like, contact failure may occur during the process. In addition, if the electronic device is defective or does not have an appropriate capacity, the PCBA cannot operate normally.

In determining whether the PCBA is defective, an inspection apparatus for measuring an electrical signal of each electronic element is used. In general, the inspection apparatus includes a stage supporting the PCBA, an aligner fixing the PCBA, and a probe. The inspection apparatus may determine whether the electronic device is defective by contacting the probe with the electrode of the electronic device and measuring an electrical signal.

KR 10-2057517 B1 (2019.12.13 Enrollment) KR 10-2020-0014140 A (2020.02.10 open) JP 2010-045282 A (2010.02.25 open) JP 2016-192549 A (2016.11.10 open) JP 1994-058978 A (1994.03.04 open)

It is an object of the present invention to provide a PCBA inspection apparatus that analyzes an image image of a PCBA and measures an electrical signal flowing through an electronic device to check whether an electronic device disposed in the PCBA is defective.

An object of the present invention described above, the base frame; A stage provided on the upper side of the base frame and supporting the PCBA; A transfer device provided on the top of the stage and transferring the probe to the top of the PCBA; And a probe device coupled to one side of the transfer device and transferred by the transfer device, and contacting an element of the PCBA to measure an electrical signal.

According to a feature of the present invention, the stage includes first and second stage rails extending in the front and rear directions by spaced apart from each other at a predetermined interval in the left and right directions on the upper side of the base frame by a plurality of support columns, and the first , It may include a fixed frame coupled to one end of the second stage rail, and a movable frame coupled so that both ends slide along the first and second stage rails.

According to another feature of the present invention, the stage includes a first lifting frame installed to be elevating below the fixed frame, a first stepping motor installed below the first lifting frame, and a lower portion of the moving frame. It may further include a second elevating frame installed to be elevating to and a second stepping motor installed below the second elevating frame.

According to another feature of the present invention, the stage may further include a plurality of elastic blocks each provided on the upper side of the first lifting frame and the second lifting frame.

According to another feature of the present invention, the transfer device includes a base rail extending in a left and right direction on an upper portion of the stage, and a pair of movements that are coupled to be slidably moved along the base rail and extend in the front and rear direction. It may include a rail and a moving block that is respectively coupled to slide along the pair of moving rails.

According to another feature of the present invention, the probe device includes a rotation motor installed on one side of the transfer device, a guide block rotatably coupled by the rotation motor, and a servo motor installed on one side of the guide block. And, it may include a probe block that is coupled to be elevating along the guide block by the servo motor and provided with a probe on one side.

According to another feature of the present invention, the probe device includes a driven pulley provided at a lower end of the guide block, and is connected between the driven pulley and the servo motor, and lifts and lowers the probe block according to the operation of the servo motor. It may further include a timing belt.

According to another feature of the present invention, the probe device may further include a camera module coupled to one side of the guide block to photograph the PCBA.

According to another feature of the present invention, the probe device may further include a lighting module coupled to one side of the guide block to illuminate the PCBA.

According to another feature of the present invention, the probe device may further include a laser module coupled to one side of the guide block and irradiating a laser beam in the PCBA direction.

According to the PCBA inspection apparatus according to the present invention, errors due to defects or breakages of the PCBA can be accurately selected by inspecting whether or not an electronic device mounted on the PCBA is defective.

1 is a photograph of a PCBA testing apparatus according to an embodiment of the present invention.
Figure 2 is a photograph of the upper base frame of the PCBA inspection apparatus according to an embodiment of the present invention.
Figure 3 is a photograph of the stage of the PCBA inspection apparatus according to an embodiment of the present invention.
Figure 4 is a photograph showing the bottom view of the stage according to an embodiment of the present invention.
5 is a photograph of a fixed frame and a first lifting frame according to an embodiment of the present invention.
6A and 6B are photographs showing the lifting state of the first lifting frame according to an embodiment of the present invention.
7 is a photograph showing a first moving rail and a first probe device according to an embodiment of the present invention.
8 is a photograph showing a second moving rail and a second probe device according to an embodiment of the present invention.
9 is a photograph showing the operation of the first probe device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments described below are only for explaining in detail enough that a person of ordinary skill in the art can easily carry out the invention, and thus, the protection scope of the present invention is limited. I don't mean it. In addition, in describing various embodiments of the present invention, the same reference numerals will be used for components having the same technical characteristics.

Example

1 is a photograph of a PCBA testing apparatus according to an embodiment of the present invention, and FIG. 2 is a photograph of an upper portion of a base frame of a PCBA testing apparatus according to an embodiment of the present invention.

PCBA inspection apparatus 100 according to an embodiment of the present invention, as shown in Figs. 1 and 2, the base frame 200, the stage 300 installed on the upper side of the base frame 200, and the stage It includes a transfer device 400 provided on the upper portion of the 300, and probe devices 500 and 600 transferred by the transfer device 400.

On the other hand, the upper frame 210 is formed on the left and right sides, rear and upper surfaces along the circumference on the upper side of the base frame 200, and a door extending to a part of the upper surface on the front of the upper frame 210 to open and close the interior. 220 is installed so as to be able to rotate in the vertical direction.

A monitor 230 is provided on one front side of the upper frame 210 to check the test result, and an input device 240 such as a keyboard is provided under the monitor 230. In addition, an emergency button 250 may be provided on one side of the front side of the upper frame 210.

A PCBA 10 (refer to FIG. 3) for error inspection is mounted on the stage 300, and the stage 300 serves to prevent flow by supporting the PCBA 10 during the inspection process.

3 is a photograph of a stage of a PCBA inspection apparatus according to an exemplary embodiment of the present invention, and FIG. 4 is a photograph showing a lower view of the stage according to an exemplary embodiment of the present invention.

As an example, the stage 300 is a base frame by a plurality of support pillars 301 installed perpendicular to the upper side of the base frame 200 and the support pillars 301 as shown in FIGS. 3 and 4. It may include first and second stage rails 310 and 320 installed side by side at a predetermined interval spaced apart from each other in the left and right direction on the upper side of the 200.

At this time, the first and second stage rails 310 and 320 are formed to extend long in the front-rear direction, and are spaced apart by a predetermined distance from the top of the base frame 200 by a pair of support columns 301 spaced at a predetermined distance in the front-rear direction. Is supported.

In addition, the fixing frame 330 is coupled to the rear ends of the first and second stage rails 310 and 320, and both ends of the moving frame 340 are slidably coupled along the first and second stage rails 310 and 320. . The moving frame 340 may slide along the first and second stage rails 310 and 320 with respect to the fixed frame 330 in the front-rear direction.

5 is a photograph of a fixed frame and a first elevating frame according to an embodiment of the present invention, and FIGS. 6A and 6B are photographs showing an elevating state of a first elevating frame according to an embodiment of the present invention.

5 and 6, a plurality of first support blocks 331 are formed to protrude downward at a predetermined distance apart from each other at a lower portion of the fixing frame 330, and each of the first support blocks 331 has a PCBA (10). ) Stepped step 332 for support is formed. In addition, a plurality of second support blocks 341 (refer to FIG. 4) having stepped jaws (not shown) are formed to protrude downwardly at a predetermined distance from each other at a lower portion of the movable frame 340 so that the first support block of the fixed frame 330 It is opposed to (331) in the anteroposterior direction.

A first lifting frame 350 is installed at a lower portion of the fixed frame 330 so as to face the first support block 331 of the fixed frame 330 in the vertical direction so as to be able to move up and down in the vertical direction. Specifically, the first stepping motor 360 is vertically installed at the lower end of the first lifting frame 350, and according to the operation of the first stepping motor 360, the first lifting frame 350 is fixed to the frame 330 ) Will rise and fall.

At this time, a plurality of first elastic blocks 351 are coupled to the upper side of the first lifting frame 350, and when the first lifting frame 350 is raised, each of the first elastic blocks 351 is a fixed frame 330 It is inserted into the space between the lower first support blocks 331 to support the PCBA (10). In this case, a first guide bar 333 for guiding the elevating direction of the first elevating frame 350 may be installed in the space between the first support blocks 331 of the fixed frame 330.

Likewise, a second lifting frame 370 (refer to FIG. 4) is installed to be able to move up and down in a lower portion of the moving frame 340 to face the second support block 341 of the moving frame 340. Specifically, a second stepping motor 380 (see FIG. 4) is vertically installed at the lower end of the second lifting frame 370, and the second lifting frame 370 is formed according to the operation of the second stepping motor 380. It is lifted with respect to the moving frame 340. In this case, in the space between the second support blocks 341 of the moving frame 340, a second guide bar 342 (see FIG. 4) for guiding the lifting direction of the first lifting frame 350 may be installed.

In addition, a plurality of second elastic blocks 371 (see FIG. 4) are coupled to the upper side of the second lifting frame 370, and each second elastic block 371 moves when the second lifting frame 370 is raised. It is inserted into the space between the second support blocks 341 under the frame 340 to support the PCBA 10.

That is, according to the present invention, according to the standard of the PCBA 10 to be inspected, the moving frame 340 is moved forward and backward with respect to the fixed frame 330 so that between the fixed frame 330 and the moving frame 340 PCBA (10) can be seated. At this time, the PCBA 10 is seated on the stepped jaws 332 formed on opposite surfaces of the fixed frame 330 and the moving frame 340, respectively. Thereafter, when the first and second lifting frames 350 and 370 are raised by the first and second stepping motors 360 and 380, one edge of the PCBA 10 between the fixing frame 330 and the first elastic block 351 Is supported by pressure, and the other edge of the PCBA 10 is supported by pressure between the moving frame 340 and the second elastic block 371.

Referring back to FIGS. 1 and 2, the transfer device 400 is provided above the stage 300 and transfers the probes 580 and 680 to the top of the PCBA 10 supported by the stage 300.

Here, the transfer device 400 includes a base rail 410 extending long in the left and right direction on the top of the stage 300, and extending long in the front and rear direction, and slides in the left and right directions along the base rail 410. It may include a pair of coupled moving rails 420 and 430 and moving blocks 421 and 431 that are coupled to slide along each of the moving rails 420 and 430.

For example, by being spaced apart from the rear of the stage 300 by a predetermined distance, a pair of supports 260 may be formed to protrude from the upper side of the base frame 200 at a predetermined distance in the left and right direction, and the upper side of the support base 260 The base rail 410 may be formed to extend long in the left and right direction.

At this time, in order to firmly support the moving rails 420 and 430 to be described later, as shown in the drawing, a pair of base rails 410 on a pair of supports 260 may be installed side by side at a predetermined distance apart in the front and rear direction. have.

7 is a photograph showing a first moving rail and a first probe device according to an embodiment of the present invention, and FIG. 8 is a photograph showing a second moving rail and a second probe device according to an embodiment of the present invention.

A first moving block 411 and a second moving block 412 are coupled to each of the upper sides of the base rail 410 so as to be slidably moved, and the first and second driving motors ( 413,414, see Fig. 4) are installed respectively. The first and second driving motors 413 and 414 are respectively coupled to the first and second moving blocks 411 and 412 by a screw shaft, and the first and second movements according to the operation of the first and second driving motors 413 and 414 The blocks 411 and 412 slide along the base rail 410 in the left and right directions.

In addition, the first moving rail 420 is coupled to the upper side of the first moving block 411, and the second moving rail 430 is parallel to the first moving rail 420 on the upper side of the second moving block 412. Are combined. The third moving block 421 is slidably coupled to the inner side of the first moving rail 420, and the fourth moving block 431 is slidably coupled to the inner side of the second moving rail 430. First and second moving motors 422 and 432 are installed at the rear ends of the first and second moving rails 420 and 430, respectively, and the first and second moving motors 422 and 432 are the third and fourth moving blocks by the screw shaft. Combined with (421,431) respectively. Accordingly, according to the operation of the first and second moving motors 422 and 432, the third and fourth moving blocks 421 and 431 slide along the first and second moving rails 420 and 430 in the front and rear directions.

On the other hand, a limit member 440 (refer to FIG. 2) is formed to be bent outward at the upper ends of the third and fourth moving blocks 421 and 431, respectively, and a limit member 440 is provided above the first and second moving rails 420 and 430. Limit sensors 441 (refer to FIG. 2) for detecting the are provided at predetermined intervals in the front-rear direction. Accordingly, the moving distance in the front and rear directions of the third and fourth moving blocks 421 and 431 may be limited by the limit sensor 441.

The probe devices 500 and 600 are coupled to one side of the transfer device 400 and transferred by the transfer device 400, and include probes 580 and 680 that contact elements of the PCBA 10 to measure electrical signals.

For example, the probe devices 500 and 600 include rotation motors 510 and 610 installed on one side of the transfer device 400, guide blocks 520 and 620 rotatably coupled by the rotation motors 510 and 610, and guide blocks 520 and 620. Servo motors 540 and 640 installed on one side of the, probe blocks 550 and 650 that are raised and lowered by the servo motors 540 and 640, and probes 580 and 680 provided in the probe blocks 550 and 650 may be included.

Specifically, the probe device according to the present invention includes a first probe device 500 coupled to one side of the first moving rail 420 and a second probe device 600 coupled to one side of the second moving rail 430. ) Can be included.

According to the first probe device 500 according to an embodiment of the present invention, a first rotation motor 510 may be installed inside the third moving block 421 by a bracket, and the first rotation motor 510 A first guide block 520 may be coupled to the lower end of) so as to be rotatable according to the operation of the first rotary motor 510. In this case, a first reducer 530 may be installed between the first rotation motor 510 and the first guide block 520.

In addition, the first guide block 520 may be formed as a single block, or may be formed by combining a plurality of blocks, and a first guide rail for guiding an elevation direction of the first probe block 550 to be described later. Including 521.

A first servo motor 540 is installed outside the first guide block 520, and the first probe block 550 is coupled to be elevating along the first guide rail 521 of the first guide block 520 do. At this time, a first driven pulley 560 is provided at the lower end of the first guide block 520, and between the driving pulley (not shown) and the first driven pulley 560 coupled to the drive shaft of the first servo motor 540 The first timing belt 570 is connected to. Both ends of the first timing belt 570 are coupled to the first probe block 550, and accordingly, the first probe block 550 of the first guide block 520 by the operation of the first servomotor 540 It goes up and down along the first guide rail 521.

At one side of the first probe block 550, a first probe 580 is provided to electrically contact an electronic device mounted on the PCBA 10 when the first probe block 550 is lowered.

Meanwhile, a first camera module 591 for photographing the PCBA 10 may be installed at one side of the first guide block 520. The first camera module 591 photographs a direction in which the end of the first probe 580 faces. In addition, a first lighting module 592, such as an LED, may be installed at one side of the first camera module 591 to illuminate the PCBA 10, and at one side of the first lighting module 592, in the direction of the PCBA 10 A first laser module 593 for irradiating a laser beam may be installed.

In addition, the second probe device 600 configured as described above may be installed inside the fourth moving block 431.

For example, according to the second probe device 600 according to an embodiment of the present invention, a second rotary motor 610 may be installed inside the fourth moving block 431 by a bracket, and a second rotary motor A second guide block 620 may be coupled to the lower end of the 610 so as to be rotatable according to the operation of the second rotary motor 610. In this case, a second reducer 630 may be installed between the second rotary motor 610 and the second guide block 620.

In addition, the second guide block 620 may be formed as a single block, a plurality of blocks may be combined with each other, and a second guide rail for guiding the elevation direction of the second probe block 650 to be described later. Includes (621).

A second servo motor 640 is installed outside the second guide block 620, and the second probe block 650 is coupled so as to be elevated along the second guide rail 621 of the second guide block 620 do. At this time, a second driven pulley 660 is provided at the lower end of the second guide block 620, and between the driving pulley (not shown) coupled to the drive shaft of the second servo motor 640 and the second driven pulley 660 The second timing belt 670 is connected to. Both ends of the second timing belt 670 are coupled to the second probe block 650, and accordingly, the second probe block 650 is moved to the second guide block 620 by the operation of the second servomotor 640. It goes up and down along the second guide rail 621.

A second probe 680 is provided at one side of the second probe block 650 to make electrical contact with an electronic device mounted on the PCBA 10 when the second probe block 650 is lowered.

Meanwhile, a second camera module 691 for photographing the PCBA 10 may be installed at one side of the second guide block 620. The second camera module 691 photographs a direction in which the end of the first probe 680 is directed. In addition, a second lighting module 692 such as an LED may be installed at one side of the second camera module 691 to illuminate the PCBA 10, and at one side of the second lighting module 692, in the direction of the PCBA 10 A second laser module (not shown) that irradiates a laser beam may be installed.

9 is a photograph showing the operation of the first probe device according to an embodiment of the present invention.

9, the first probe device 500 according to an embodiment of the present invention is transferred to the upper portion of the PCBA 10 by the transfer device 400, and the first probe 580 is transferred to the PCBA ( The test signal is applied to the electronic device of 10).

Meanwhile, the PCBA inspection apparatus 100 according to an embodiment of the present invention includes a control module (not shown) that reads design data of the PCBA 10 and determines position information of the electronic elements disposed thereon. As another example, when board design data is not separately provided to the control module, the user may directly set an area in which the electronic device is disposed on the image of the PCBA 10 displayed on the monitor 230 through the input device 240.

The control module controls the operation of the transfer device 400 according to the inspection order of the electronic device, so that the first and second probes 580 and 680 may contact the PCBA 10 supported on the stage 300, and the first , The inspection signal may be applied to the electronic device through the second probes 580 and 680.

In addition, the control module may analyze an electrical signal output from the electronic device in response to the inspection signal, and determine whether the electronic device is defective based on the analysis result. For example, the control module can determine the impedance of the electronic element, the applied voltage, the amount of change in current, whether the circuit is shorted, etc., using the electric signals measured by the first and second probes 580 and 680. If it is within the threshold range of the reference signal, it is determined as a normal device, and if it is out of the threshold range, it is determined as a defective device.

At this time, the monitor 230 is provided with an image of the PCBA 10 as an inspection target and the terminal status of the electronic device to the user in real time.

Although the embodiments of the present invention have been described above, it is understood that those of ordinary skill in the art to which the present invention pertains can perform various modifications without departing from the scope of the claims of the present invention.

100: PCBA inspection device 200: base frame
230: monitor 240: input device
300: stage 310: first stage rail
320: second stage rail 330: fixed frame
340: moving frame 350: first lifting frame
360: first stepping motor 370: second lifting frame
380: second stepping motor 400: transfer device
410: base rail 420: first moving rail
430: second moving rail 500: first probe device
510: first rotating motor 520: first guide block
550: first probe block 580: first probe
600: second probe device 610: second rotary motor
620: second guide block 650: second probe block
680: second probe

Claims (10)

Base frame;
A stage provided on the upper side of the base frame and supporting the PCBA;
A transfer device provided on the top of the stage and transferring the probe to the top of the PCBA; And
A probe device coupled to one side of the transfer device and transferred by the transfer device, comprising a probe device for measuring an electrical signal by contacting an element of the PCBA
The stage,
First and second stage rails extending in the front and rear directions by spaced apart from each other at a predetermined interval in the left and right directions on the upper side of the base frame by a plurality of support columns, and a fixed frame coupled to one end of the first and second stage rails And, a moving frame having both ends slidably coupled to each other along the first and second stage rails, a first lifting frame installed to be elevating under the fixed frame, and a lower part of the first lifting frame The first stepping motor to be configured, a second lifting frame installed to be elevating below the moving frame, a second stepping motor installed below the second lifting frame, and spaced apart from each other at a predetermined interval under the fixed frame A plurality of first support blocks protruding downward and having a stepped step formed to support the PCBA, and provided on an upper side of the first lifting frame, and the plurality of first support blocks when the first lifting frame is raised A first elastic block inserted into the interspace to support the PCBA, a first guide bar installed in the space between the plurality of first support blocks and guiding the elevating direction of the first elevating frame, and a lower portion of the moving frame A plurality of second support blocks are formed to protrude downward at a predetermined distance from each other, and have a stepped step formed to support the PCBA, and are provided on the upper side of the second lifting frame, and when the second lifting frame is raised, the plurality of A second elastic block inserted into the space between the two second support blocks to support the PCBA, and a second guide bar installed in each space between the plurality of second support blocks and guiding the elevating direction of the second lifting frame. PCBA inspection device, characterized in that. delete delete delete The method according to claim 1,
The transfer device includes a base rail extending in a left and right direction on an upper portion of the stage, a pair of moving rails coupled to be slidably movable along the base rail and extending in a front and rear direction, and the pair of moving rails PCBA inspection device, characterized in that it comprises a moving block that is coupled to each of the slide movement along the. The method according to claim 1,
The probe device includes a rotation motor installed on one side of the transfer device, a guide block rotatably coupled by the rotation motor, a servo motor installed on one side of the guide block, and the guide by the servo motor. PCBA inspection apparatus, characterized in that it comprises a probe block that is coupled to be liftable along the block and provided with a probe on one side. The method of claim 6,
The probe device further comprises a driven pulley provided at a lower end of the guide block, and a timing belt connected between the driven pulley and the servo motor and for raising and lowering the probe block according to the operation of the servo motor. PCBA inspection device. The method of claim 6,
The probe device further comprises a camera module coupled to one side of the guide block to photograph the PCBA. The method of claim 6,
The probe device further comprises a lighting module coupled to one side of the guide block to illuminate the PCBA. The method of claim 6,
The probe device further comprises a laser module coupled to one side of the guide block and irradiating a laser beam in the PCBA direction.

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