Image acquisition device for PCB hole site detection

Abstract

The utility model provides an image acquisition device for hole site detection of a PCB (Printed Circuit Board), which is used for detecting the hole site of the PCB, and comprises a workbench comprising a fixed seat and a portal frame; the carrying table is mounted on the fixed seat and is used for fixing a PCB to be tested; the camera module is mounted at the top of the portal frame and comprises a camera used for collecting images of the part, comprising at least one hole, of the PCB; the carrying table comprises a rotary table, a placing plate assembly, a pressing plate assembly and a rotary driving part, the rotary table is rotatably mounted on the fixed seat, a mounting groove is formed in the center of the rotary table, the placing plate assembly is mounted in the mounting groove and comprises a placing plate made of a transparent material, and the pressing plate assembly is arranged on the rotary driving part. The pressing plate assembly is installed on the rotating disc in an up-down overturning mode and comprises a pressing plate which is matched with the containing plate and made of transparent materials, and the central axis of the rotating disc and the central axis of the camera are arranged at a preset interval in the front-back direction of the workbench.

Description

Technical Field

[0001] The utility model belongs to the technical field of PCB board detection, and in particular relates to an image acquisition device for PCB board hole position detection. Background Art

[0002] PCB is the support of electronic components and also the carrier for the electrical connection of electronic components. Due to different functions and installation positions, PCB needs to have holes in different positions, and each hole position needs to be positioned with high precision. Therefore, it is necessary to detect the hole positions of PCB during the production process of PCB.

[0003] The optical inspection equipment currently on the market for PCB board hole position detection first uses an image acquisition device to capture an image of the PCB board, and then uses a microprocessor to compare and analyze the captured image with a pre-stored standard image to determine whether the hole position on the PCB board meets the requirements.

[0004] However, the existing image acquisition device can generally only adjust the up and down position of the lens, and the stage is in a fixed state, and can only accurately capture the image of a part of the PCB board located directly below the lens. When it is necessary to capture images of other parts, the position of the PCB board on the stage needs to be manually adjusted, which is not only inefficient, but also prone to human errors during operation, resulting in poor consistency of image quality. Utility Model Content

[0005] The utility model is developed to solve the above technical problems, and aims to provide an image acquisition device for PCB board hole position detection.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides an image acquisition device for hole position detection of a PCB board, which has the following characteristics: a workbench, comprising a fixing seat and a gantry mounted on the fixing seat; a carrier, located in the gantry and mounted on the fixing seat, and used to fix the PCB board to be tested; a camera module, mounted on the top of the gantry, comprising a camera for acquiring an image of a portion of the PCB board including at least one hole; and a controller, electrically connected to the camera and the carrier, and used to operate the camera and the carrier, wherein the carrier comprises a turntable, a placing plate assembly, a pressing plate assembly, and a rotating driving member for driving the turntable to rotate, the turntable is rotatably mounted on the fixing seat, a mounting groove is provided at the central portion, the placing plate assembly is mounted in the mounting groove, and comprises a placing plate made of a transparent material for placing the PCB board to be tested, the pressing plate assembly can be mounted on the turntable in an upside-down manner, and comprises a pressing plate matched with the placing plate and made of a transparent material for pressing the PCB board flat on the placing plate, and the central axis of the turntable and the central axis of the camera are arranged at a predetermined interval in the front-rear direction of the workbench.

[0008] The image acquisition device for PCB board hole position detection provided by the utility model may also have the following characteristics: wherein, the rotary drive member is located below the turntable and fixedly arranged on the fixed seat, and the turntable is fixedly arranged on the free end of the rotating shaft of the rotary drive member.

[0009] The image acquisition device for PCB board hole position detection provided by the utility model may also have the following features: wherein the carrier also includes a backlight source, which is installed in the installation groove and is located below the placement plate.

[0010] The image acquisition device for PCB board hole position detection provided by the utility model may also have the following features: wherein the carrier also includes an in-place sensor assembly, the in-place sensor assembly includes an in-place sensor and a sensing member matching the in-place sensor, the in-place sensor is fixed on a fixed seat, and the sensor is arranged on the lower surface of the turntable.

[0011] The image acquisition device for PCB board hole position detection provided by the utility model may also have the following features: wherein the pressure plate assembly also includes a pressure plate frame for installing the pressure plate, the pressure plate frame and the turntable are mutually adsorbed through multiple pairs of magnetic blocks, the multiple pairs of magnetic blocks are arranged at intervals along the circumference of the pressure plate frame, one of each pair of magnetic blocks is installed on the lower surface of the pressure plate frame, and the other is installed on the upper surface of the turntable.

[0012] In the image acquisition device for PCB board hole position detection provided by the utility model, it can also have the following characteristics: wherein, the pressure plate assembly also includes a pressure plate frame for installing the pressure plate, and a limit block for limiting the pressure plate frame, the rear end of the pressure plate frame is flippably connected to the turntable, the limit block is fixedly arranged on the turntable, and has an inclined surface for fitting with the upper surface of the rear end of the pressure plate frame, the pressure plate frame and the limit block are mutually adsorbed by multiple pairs of magnetic blocks, one of each pair of magnetic blocks is installed on the upper surface of the pressure plate frame, and the other is installed on the inclined surface.

[0013] The image acquisition device for PCB board hole position detection provided by the utility model may also have the following feature: a handle is provided at the middle position of the front end of the pressing plate frame.

[0014] The image acquisition device for PCB board hole position detection provided by the utility model may also have the following feature: wherein the camera module further includes an annular light source, and the annular light source is located below the camera.

[0015] The image acquisition device for PCB board hole position detection provided by the utility model may also have the following feature: wherein the workbench is a marble workbench.

[0016] Function and effect of utility model

[0017] According to the image acquisition device for PCB board hole position detection involved in the utility model, because it has a carrier, a camera module and a controller, the carrier includes a turntable, a placement plate assembly and a pressure plate assembly installed on the turntable, and a rotating drive member for driving the turntable to rotate, the turntable is rotatably installed on the fixed seat, the placement plate assembly includes a placement plate made of transparent material for placing the PCB board to be tested, the pressure plate assembly can be turned up and down, and includes a pressure plate matched with the placement plate and made of transparent material for pressing the PCB board flat on the placement plate, the central axis of the turntable and the central axis of the camera are arranged at a predetermined interval in the front and rear direction of the workbench, the camera module can acquire an image of a portion of the PCB board including at least one hole, the controller is electrically connected to the camera and the carrier, and can control the camera and the carrier to work, so this embodiment can realize automatic acquisition of PCB board images without manually adjusting the position of the PCB board on the carrier, which not only improves the image acquisition efficiency, but also avoids the problem of human errors that are prone to occur in manual operation, and ensures the consistency of image quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of an image detection device for PCB board hole position detection in an embodiment of the utility model;

[0019] Figure 2It is a three-dimensional structural schematic diagram of a workbench in an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the carrier in the embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of the disassembled installation of the carrier in the embodiment of the utility model;

[0022] Figure 5 is a schematic diagram of the three-dimensional structure of a camera module in an embodiment of the present utility model;

[0023] Figure 6 It is a schematic diagram of the disassembled installation of the camera module in the embodiment of the present utility model. DETAILED DESCRIPTION

[0024] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of an image acquisition device for PCB board hole position detection in an embodiment of the utility model.

[0026] like Figure 1 As shown, in this embodiment, the image acquisition device 100 for PCB board hole position detection includes a base 10, a workbench 20, a carrier 30, a camera module 40 and an electric control box 50.

[0027] like Figure 1 As shown, the base 10 is rectangular and is used to install the workbench 20, the stage 30, the camera module 40 and the electric control box 50. In this embodiment, the four corners of the bottom of the base 10 are respectively provided with adjustable feet 11.

[0028] Figure 2 It is a three-dimensional structural schematic diagram of a workbench in an embodiment of the utility model.

[0029] like Figure 1 and Figure 2 As shown, the workbench 20 is fixedly disposed on the middle part of the base 10 in the front-rear direction thereof, and is used to install the carrier 30 and the camera module 40. The workbench 20 includes a fixing seat 21 and a gantry 22.

[0030] The fixing seat 21 is a rectangular plate, fixedly disposed on the machine base 10. In this embodiment, a mounting groove 21a matching the rotating drive member mounting plate 31a in the stage 30 is provided at the central portion of the fixing seat 21.

[0031] The gantry 22 is mounted on the fixing seat 21 and is composed of a horizontal plate and two vertical plates. In this embodiment, a through hole 22a is provided in the middle of the horizontal plate of the gantry 22 for the lens 43b of the camera module 40 to pass through.

[0032] In this embodiment, the fixing base 21 and the gantry 22 are both made of marble.

[0033] Figure 3 It is a schematic diagram of the three-dimensional structure of the carrier in the embodiment of the utility model; Figure 4 It is a schematic diagram of the disassembled installation of the carrier in the embodiment of the utility model.

[0034] like Figure 1 , Figure 3 as well as Figure 4 As shown, the carrier 30 is located in the gantry 22 and mounted on the fixing seat 21 for fixing the PCB to be tested. The carrier 30 includes a rotating drive member 31, a turntable 32, a placing plate assembly 33, a pressing plate assembly 34 and three in-position sensor assemblies 35.

[0035] The rotary drive member 31 is a motor, and a rotary drive member mounting plate 31 a is provided at the bottom thereof. The rotary drive member mounting plate 31 a is disposed in a mounting groove 21 a of the fixing seat 21 , so that the rotary drive member 31 is mounted on the fixing seat 21 .

[0036] The turntable 32 is fixedly mounted on the free end of the rotating shaft of the rotating drive member 31, and can rotate relative to the fixed seat 21 under the drive of the rotating drive member 31. In this embodiment, a rectangular mounting groove 32a is provided in the central part of the turntable 32; an operating groove 32b is provided in the middle position of the turntable 32 located in front of the mounting groove 32, so as to facilitate the placement of the PCB board in the placement plate assembly 33 and the operation of the pressure plate assembly 34.

[0037] The placing plate assembly 33 is detachably mounted in the mounting groove 32a of the rotating disk 32, and is used to place the PCB board to be tested. The placing plate assembly 33 includes a placing plate frame 33a and a placing plate (not shown in the figure).

[0038] The placement plate frame 33a is a rectangular frame matching the mounting groove 32a.

[0039] The placement plate is a rectangular flat plate made of a transparent material, mounted on the placement plate frame 33a, and used to place the PCB board to be tested. In this embodiment, the placement plate adopts a transparent glass plate.

[0040] The pressing plate assembly 34 can be installed on the turntable 32 in an upside-down manner and is arranged corresponding to the placing plate assembly 33, and is used to press the PCB board on the placing plate flat on the placing plate. The pressing plate assembly 34 includes a pressing plate frame 34a, a pressing plate (not shown in the figure) and a handle 34b.

[0041] The pressing plate frame 34a is a rectangular frame slightly larger than the placing plate frame 33a, and its rear end is mounted on the turntable 32 via two pivot shafts 34c so as to be flipped up and down.

[0042] The pressing plate is a rectangular flat plate made of a transparent material, mounted on the pressing plate frame 34a, and is used to press the PCB board on the placing plate flat on the placing plate. In this embodiment, the pressing plate adopts a transparent glass plate.

[0043] The handle 34b is fixedly disposed at the middle position of the front end of the pressing plate frame 34a, so as to facilitate holding to operate the pressing plate assembly to perform an upside-down flipping action.

[0044] In this embodiment, the pressure plate frame 34a is attracted to the turntable 32 through eight pairs of magnetic blocks 34d. The eight pairs of magnetic blocks 34d are arranged at intervals along the circumference of the pressure plate frame 34a, and each pair of magnetic blocks includes two magnetic blocks with opposite magnetic properties; one of each pair of magnetic blocks 34d is installed in an embedded manner on the lower surface of the pressure plate frame 34a, and the other is installed in an embedded manner on the upper surface of the turntable 32.

[0045] In this embodiment, the pressure plate assembly 34 also includes a limit block 34e for limiting the pressure plate frame 34a; the limit block 34e is fixedly set on the turntable 32 and is corresponding to the rear end of the pressure plate frame 34a, and has an inclined surface 34f for fitting with the upper surface of the rear end of the pressure plate frame 34a; the pressure plate frame 34a is adsorbed by the limit block 34e through multiple pairs of magnetic blocks 34g arranged at intervals, each pair of magnetic blocks includes two magnetic blocks with opposite magnetic properties, one of each pair of magnetic blocks 34g is installed in an embedded manner on the upper surface of the pressure plate frame 34a, and the other is installed in an embedded manner on the inclined surface 34f.

[0046] Three in-position sensor assemblies 35 are arranged at intervals along the circumference of the turntable 32, and each in-position sensor 35 comprises an in-position sensor 35a and a sensing member 35b matching the in-position sensor 35a. The in-position sensor 35a is fixedly arranged on the fixing seat 21, and the sensing member 35b is correspondingly arranged on the lower surface of the turntable 32.

[0047] In this embodiment, the carrier 30 further includes a backlight source (not shown in the figure), which is installed in the installation groove 32 a and is located below the placement plate assembly 33 .

[0048] Figure 5 is a schematic diagram of the three-dimensional structure of a camera module in an embodiment of the present utility model; Figure 6 It is a schematic diagram of the disassembled installation of the camera module in the embodiment of the present utility model.

[0049] like Figure 1 , Figure 5as well as Figure 6 As shown, the camera module 40 is mounted on the top of the gantry 22 and is used to collect images of a portion of the PCB board that includes at least one hole. The camera module 40 includes a fixing frame 41, a mounting frame 42, a camera 43, a ring light source 44 and an outer cover 45.

[0050] The fixing frame 41 is fixedly disposed on the horizontal plate at the top of the gantry 22 and is used for installing the mounting frame 42 and the camera 43 .

[0051] The mounting frame 42 is movably mounted on the fixing frame 41 through a lifting and adjusting mechanism 42a, and is provided with a piezoelectric slide 42b and a mounting plate 42c mounted on the piezoelectric slide 42b.

[0052] The camera 43 is mounted on the mounting plate 42c of the mounting frame 42, and has a camera body 43a and a lens 43b, the upper end of the lens 43b passes upward through the through hole 22a at the top of the gantry 22 and is connected to the camera body 43a. In this embodiment, the central axis of the turntable 32 and the central axis of the camera 43 are arranged at a predetermined interval in the front-to-back direction of the workbench 20.

[0053] The annular light source 44 is located below the camera 43 and is fixed to the top of the gantry 22 via four support rods 44 a.

[0054] The cover 45 is mounted on the outside of the camera body 43 a and the mount 42 .

[0055] like Figure 1 As shown, the electric control box 50 is installed on the base 10 at a position behind the workbench 20, and a switching power supply and a controller (not shown in the figure) are arranged therein.

[0056] The switching power supply is connected to an external power supply and is used to supply power to the entire image acquisition device.

[0057] The controller is electrically connected to the stage 30 and the camera module 40 respectively, and is used to control these mechanisms to work.

[0058] In this embodiment, the working process of the image acquisition device 100 for PCB hole position detection is as follows:

[0059] The pressure plate assembly 34 is manually turned upward and adsorbed to the inclined surface 34f of the limit block 34e by the magnetic attraction of the multiple pairs of magnetic blocks 34g.

[0060] The PCB board to be tested is manually placed on the placement plate of the placement plate assembly 33 through the pick-and-place port 61, and then the pressure plate assembly 34 is manually flipped downward and adsorbed to the turntable 32 through the magnetic attraction of multiple pairs of magnetic blocks 34, so that the pressure plate of the pressure plate assembly 34 presses the PCB board on the placement plate flat on the placement plate.

[0061] The controller controls the backlight source of the carrier 30 and the ring light source 44 of the camera module 40 to turn on, and controls the camera 43 to capture the image of one end of the PCB board; then, the controller controls the rotating drive 31 to work so that the carrier 30 rotates 180°, and controls the camera 43 to capture the image of the other end of the PCB board.

[0062] The controller controls the rotary drive member 31 to work and reset the stage 30, manually flips the pressure plate assembly 34 upward, and removes the PCB board from the placement plate, thus completing the image acquisition work of a PCB board.

[0063] Example Function and Effect

[0064] According to the image acquisition device for PCB board hole position detection involved in this embodiment, because it has a carrier, a camera module and a controller, the carrier includes a turntable, a placement plate assembly and a pressure plate assembly installed on the turntable, and a rotating drive member for driving the turntable to rotate, the turntable is rotatably mounted on the fixed seat, the placement plate assembly includes a placement plate made of transparent material for placing the PCB board to be tested, the pressure plate assembly can be turned up and down, and includes a pressure plate matched with the placement plate and made of transparent material for pressing the PCB board flat on the placement plate, the central axis of the turntable and the central axis of the camera are arranged at a predetermined interval in the front and rear direction of the workbench, the camera module can acquire an image of a portion of the PCB board including at least one hole, the controller is electrically connected to the camera and the carrier, and can control the camera and the carrier to work, so this embodiment can realize automatic acquisition of PCB board images without manually adjusting the position of the PCB board on the carrier, which not only improves the image acquisition efficiency, but also avoids the problem of human errors that are prone to occur in manual operation, and ensures the consistency of image quality.

[0065] In addition, because the carrier also has a backlight source, which is installed in the installation groove and is located below the placement plate, the camera imaging is clearer, further ensuring the image acquisition accuracy.

[0066] In addition, because the carrier also has an in-place sensor assembly, the in-place sensor assembly contains an in-place sensor and a sensing part matching the in-place sensor, the in-place sensor is fixed on a fixed seat, and the sensor is set on the lower surface of the turntable, which ensures the accuracy of the position of the carrier and further ensures the accuracy of image acquisition.

[0067] In addition, because the pressure plate assembly and the turntable are adsorbed to each other through the magnetic block, the flattening effect of the PCB board is further improved, and the image acquisition accuracy is further improved.

[0068] In addition, because the pressure plate assembly is adsorbed to each other by the magnetic block and the limit block, the operation of the pressure plate assembly is more convenient.

[0069] Those skilled in the art should understand that the above embodiments are preferred cases of the present invention, which are intended to enable those skilled in the art to understand the intention of the present invention, rather than to limit the protection scope of the present invention.

Claims

1. An image acquisition device for PCB board hole position detection, characterized in that: include: A workbench, comprising a fixed base and a gantry mounted on the fixed base; A carrier, located in the gantry and mounted on the fixing seat, for fixing the PCB to be tested; A camera module, mounted on the top of the gantry, comprising a camera for capturing an image of a portion of the PCB board including at least one hole; as well as A controller, electrically connected to the camera and the stage, for operating the camera and the stage, The carrier includes a turntable, a placement plate assembly, a pressure plate assembly, and a rotation drive member for driving the turntable to rotate. The turntable is rotatably mounted on the fixed seat, and a mounting groove is provided in the central portion. The placement board assembly is installed in the installation groove, and includes a placement board made of transparent material for placing the PCB board to be tested. The pressing plate assembly can be mounted on the turntable in an upside-down manner, and comprises a pressing plate matched with the placing plate and made of a transparent material for pressing the PCB board flat on the placing plate. The central axis of the turntable and the central axis of the camera are arranged at a predetermined interval in the front-rear direction of the workbench.

2. The image acquisition device for PCB hole position detection according to claim 1, characterized in that: in, The rotary drive member is located below the turntable and is fixedly mounted on the fixed seat. The rotating disk is fixedly arranged on the free end of the rotating shaft of the rotating driving member.

3. The image acquisition device for PCB hole position detection according to claim 1, characterized in that: in, The carrier also includes a backlight source, which is installed in the installation groove and located below the placement plate.

4. The image acquisition device for PCB hole position detection according to claim 1, characterized in that: in, The carrier also includes a position sensor assembly, which includes a position sensor and a sensing element matched with the position sensor. The in-position sensor is fixedly arranged on the fixing seat. The sensor is arranged on the lower surface of the turntable.

5. The image acquisition device for PCB hole position detection according to claim 1, characterized in that: in, The pressure plate assembly also includes a pressure plate frame for mounting the pressure plate. The pressing plate frame is mutually adsorbed with the rotating disk through multiple pairs of magnetic blocks. The plurality of pairs of magnetic blocks are arranged at intervals along the circumference of the pressure plate frame. One of the magnetic blocks in each pair is mounted on the lower surface of the platen frame, and the other is mounted on the upper surface of the turntable.

6. The image acquisition device for PCB hole position detection according to claim 1, characterized in that: in, The pressing plate assembly also includes a pressing plate frame for mounting the pressing plate, and a limiting block for limiting the position of the pressing plate frame. The rear end of the pressing plate frame is connected to the rotating disk in a flippable manner. The limit block is fixedly arranged on the rotating disk and has an inclined surface for fitting with the upper surface of the rear end of the pressing plate frame. The pressure plate frame is mutually adsorbed with the limit block through multiple pairs of magnetic blocks. One of each pair of magnetic blocks is mounted on the upper surface of the platen frame, and the other is mounted on the inclined surface.

7. The image acquisition device for PCB hole position detection according to claim 5 or 6, characterized in that: in, A handle is provided at the middle position of the front end portion of the pressing plate frame.

8. The image acquisition device for PCB hole position detection according to claim 1, characterized in that: in, The camera module further comprises a ring-shaped light source, which is located below the camera.

9. The image acquisition device for PCB hole position detection according to claim 1, characterized in that: in, The workbench is a marble workbench.

Images