Device for detecting PCB (Printed Circuit Board)

Abstract

The utility model relates to the technical field of PCB production, and aims to solve the technical problem of missing detection. In order to solve the technical problem, the utility model provides the device for detecting the PCB. The device is characterized in that a combined annular light source is arranged above a sample table; a first annular lamp panel of the combined annular light source is coaxially arranged above a second annular lamp panel; the first annular lamp panel is provided with a plurality of first lamp beads used for exciting fluorescent substances. The second lamp bead comprises a red chip, a green chip, a blue chip and a white light chip; the coaxial light source assembly is connected to the top of the combined annular light source. The projection of the outlet of the coaxial light source assembly on the horizontal plane is within the projection of the light-emitting surface of the combined annular light source on the horizontal plane. The controller is used for controlling the current of the red chip, the current of the green chip and the current of the blue chip of the second lamp bead and the current of the first lamp bead; and a lens of the color camera and the combined annular light source are coaxially arranged. The utility model avoids missing detection.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB board production, in particular to a device for PCB board detection. Background Art

[0002] After the PCB board is produced, its appearance and contour need to be inspected as well as whether there are fluorescent substances on the surface. Existing inspection equipment can only detect the appearance and contour, but cannot identify whether there are fluorescent substances on the surface; in addition, it cannot identify the mirror surface of the PCB board, which leads to the risk of missed inspection. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the above-mentioned problems existing in the prior art.

[0004] In order to solve the above technical problems, the utility model provides a device for PCB board detection, comprising: a sample table, which is horizontally arranged and used to place the object to be detected;

[0005] A combined annular light source is arranged above the sample table; the combined annular light source comprises a housing, a first annular light plate and a second annular light plate arranged in the housing, the first annular light plate and the second annular light plate have the same inclination angle; the first annular light plate is coaxially arranged above the second annular light plate; a plurality of first lamp beads for exciting fluorescent substances are arranged at intervals along the circumference of the inner wall of the first annular light plate. A plurality of second lamp beads are arranged along the circumference of the inner wall of the second annular light plate, the second lamp beads include red chips, green chips, blue chips and white light chips, providing multi-color lighting for identifying objects of different colors;

[0006] A coaxial light source assembly is connected to the top of the combined annular light source, and an outlet is provided at the bottom of the coaxial light source assembly, and the projection of the outlet on the horizontal plane is located within the projection of the light-emitting surface of the combined annular light source on the horizontal plane;

[0007] A controller, used to control the current of the red chip, the green chip, the blue chip of the second lamp bead and the current of the first lamp bead, so as to adjust the brightness or switching of the red chip, the green chip and the blue chip in the second lamp bead, and the brightness or switching of the first lamp bead; the controller also controls the current of the coaxial light source assembly;

[0008] A color camera is connected with a lens at the bottom; the lens is coaxially arranged with the combined annular light source; the color camera is used for taking pictures, and the lens is used for imaging.

[0009] In one embodiment of the utility model, a plurality of circles of first lamp beads are arranged on the first annular lamp panel.

[0010] In one embodiment of the utility model, a plurality of circles of second lamp beads are arranged on the second annular lamp panel.

[0011] In one embodiment of the present invention, the first lamp bead is a UV lamp bead.

[0012] In one embodiment of the utility model, the coaxial light source assembly includes a shell, a first chamber is provided in the shell, a vertically arranged third light board, a vertically arranged diffuser plate and a semi-transparent and semi-reflective lens are provided in the first chamber; the third light board is arranged parallel to one side of the diffuser plate, and the semi-transparent and semi-reflective lens is arranged at a 45-degree inclination on the other side of the diffuser plate; the diffuser plate and the semi-transparent and semi-reflective lens are arranged to form an outlet at the bottom of the shell; an inlet is provided at the top of the shell, directly above the outlet.

[0013] In one embodiment of the present invention, the coaxial light source assembly further includes a second chamber disposed inside the housing, the second chamber is disposed on one side of the first chamber, and a heat sink is disposed in the first chamber.

[0014] In one embodiment of the utility model, a transparent protective cover is provided at the inlet.

[0015] In one embodiment of the present invention, a plurality of heat dissipation holes are provided on one side of the housing close to the heat sink.

[0016] In one embodiment of the utility model, the housing includes an annular Z-shaped bottom housing, an annular intermediate housing, and an annular cover plate; the intermediate housing is connected to the bottom of the Z-shaped bottom housing, and the cover plate is connected to the bottom of the intermediate housing;

[0017] In one embodiment of the utility model, a first slot is provided on the top of the bottom shell, and the inner wall of the bottom shell and the upper surface of the intermediate shell form a first step; two ends of the first annular light board are respectively clamped in the first slot and the first step;

[0018] In one embodiment of the utility model, a second slot is provided on the top of the intermediate shell, and the inner wall of the intermediate shell and the upper surface of the cover plate form a second step; the two ends of the second annular light panel are respectively clamped in the second slot and the second step.

[0019] In one embodiment of the present invention, the first annular light panel is connected to a first power line, and the first power line is electrically connected to the first lamp bead, the power supply and the controller.

[0020] In one embodiment of the utility model, the second annular light panel is connected to a second power cord, which includes four branches, which are electrically connected to the red chip, green chip, blue chip and white light chip of the second lamp bead respectively, and the four branches are also electrically connected to the main power supply and the controller.

[0021] In one embodiment of the present invention, the inclination angles of the first annular light panel and the second annular light panel are both 30°±10°.

[0022] The above technical solution of the utility model has the following advantages compared with the prior art:

[0023] The device for PCB board detection described in the utility model, wherein the second annular light board is combined with a coaxial light source assembly, can detect the appearance contour of the relatively rough surface of the object to be tested (PCB board to be tested) placed on the sample table, and can also detect the appearance contour of the mirror surface of the object to be tested. It can be seen that the detection of this embodiment is comprehensive and avoids missed detection. In addition, the first annular light board is also provided in this embodiment, which can excite fluorescent substances, so as to detect whether the object to be tested has fluorescent substances. Since the fluorescent substances will display colors (for example, red, green or blue) after being excited by the first annular light board, the colors displayed by the fluorescent substances excited in this way will cause light confusion with the gray of the second annular light board, so the controller is provided in this embodiment. After identifying the color of the excited fluorescent substances (for example, red), the current of the chip of the same color (red chip) in the second annular light board can be controlled by the controller to adjust the brightness of the chip (red chip) or turn it off, thereby avoiding light confusion while identifying the fluorescent substances, and having various functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein:

[0025] Figure 1 It is a structural schematic diagram of a device for PCB board detection in a preferred embodiment of the utility model;

[0026] Figure 2 yes Figure 1 A schematic diagram of the structure of a device for PCB board detection (excluding the controller);

[0027] Figure 3 yes Figure 1 A schematic diagram of the structure of a coaxial light source assembly and a combined annular light source in a device for PCB board detection;

[0028] Figure 4 yes Figure 3 A top view of

[0029] Figure 5 yes Figure 4 AA section view;

[0030] Figure 6 yes Figure 1 A schematic diagram of the structure of a combined annular light source in a device for PCB board detection;

[0031] Figure 7 yes Figure 6 Exploded diagram.

[0032] Description of the accompanying drawings in the specification: 100, sample table;

[0033] 200, combined annular light source; 210, housing; 211, Z-shaped bottom housing; 212, intermediate housing; 213, cover plate; 214, first slot; 215, first step; 216, second slot; 217, second step; 220, first annular light board; 221, first lamp bead; 222, first power cord; 230, second annular light board; 231, second lamp bead; 232, second power cord;

[0034] 300, coaxial light source assembly; 310, outlet; 320, housing; 321, heat dissipation hole; 330, first chamber; 340, third light board; 350, diffusion plate; 360, semi-transparent and semi-reflective lens; 370, inlet; 371, protective cover; 380, second chamber; 390, radiator;

[0035] 400, controller;

[0036] 500. Color camera. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0038] Reference Figure 1 to Figure 7 As shown, the embodiment of the utility model provides a device for PCB board detection, including:

[0039] The sample table 100 is horizontally arranged and used for placing the object to be measured;

[0040] The combined annular light source 200 is arranged above the sample table 100; the combined annular light source 200 includes a housing 210, a first annular light board 220 and a second annular light board 230 arranged in the housing 210, and the first annular light board 220 and the second annular light board 230 have the same inclination angle; in some embodiments, the inclination angles of the first annular light board 220 and the second annular light board 230 are both 30°±10°. The first annular light board 220 is coaxially arranged above the second annular light board 230; a plurality of first lamp beads 221 for exciting fluorescent substances are arranged at intervals along the circumference of the inner wall of the first annular light board 220; a plurality of second lamp beads 231 are arranged along the circumference of the inner wall of the second annular light board 230, and the second lamp beads 231 include a red chip, a green chip, a blue chip and a white light chip; the second lamp beads 231 are used to identify objects under test of different colors;

[0041] The coaxial light source assembly 300 is connected to the top of the combined annular light source 200. The bottom of the coaxial light source assembly 300 is provided with an outlet 310. The projection of the outlet 310 on the horizontal plane is located within the projection of the light-emitting surface of the combined annular light source 200 on the horizontal plane.

[0042] The controller 400 is used to control the current of the red chip, the green chip, the blue chip of the second lamp bead 231 and the current of the first lamp bead 221; the controller 400 also controls the current of the coaxial light source assembly 300;

[0043] The color camera 500 has a lens connected to the bottom; the lens is coaxially arranged with the combined annular light source 200 .

[0044] Specifically, the second annular light board 230 in the present embodiment is combined with the coaxial light source assembly 300, that is, it can detect the appearance contour of the relatively rough surface of the object to be tested (PCB board to be tested) placed on the sample table 100, and can also detect the appearance contour of the mirror surface of the object to be tested. It can be seen that the present embodiment has comprehensive detection to avoid missed detection. In addition, the present embodiment is also provided with a first annular light board 220, which can excite fluorescent substances, so as to detect whether the object to be tested has fluorescent substances. Since the fluorescent substances excited by the first annular light board 220 will display a color (for example, red, green or blue), the color displayed by the fluorescent substances excited in this way will cause light confusion with the gray of the second annular light board 230, so the present embodiment is provided with a controller 400. After identifying the color of the excited fluorescent substances (for example, red), the current of the same color chip (red chip) in the second annular light board 230 can be controlled by the controller 400 to adjust the brightness of the chip (red chip) or turn it off, thereby avoiding light confusion while identifying fluorescent substances, and having various functions.

[0045] In some embodiments, the detected object needs to be detected in a high-speed motion scene, so it is necessary to use a high-power combined ring light source 200 to increase the brightness of the combined ring light source 200 to meet the low exposure time and high brightness requirements in the high-speed scene.

[0046] Further, the first annular light plate 220 is provided with a plurality of circles of first lamp beads 221. The second annular light plate 230 is provided with a plurality of circles of second lamp beads 231. The first lamp beads 221 are UV lamp beads.

[0047] Further, the coaxial light source assembly 300 includes a housing 320, a first chamber 330 is provided in the housing 320, a third lamp board 340 arranged vertically, a diffuser plate 350 arranged vertically and a semi-transparent and semi-reflective lens 360 are provided in the first chamber 330; the third lamp board 340 is arranged parallel to one side of the diffuser plate 350, and the semi-transparent and semi-reflective lens 360 is arranged at a 45-degree angle on the other side of the diffuser plate 350; the diffuser plate 350 and the semi-transparent and semi-reflective lens 360 are arranged to form an outlet 310 arranged at the bottom of the housing 320; an inlet 370 is provided at the top of the housing 320 directly above the outlet 310. The third lamp board 340 includes a third lamp bead, and the third lamp bead may include a red chip, a green chip, a blue chip and a white light chip. The light emitted by the third lamp bead is uniformly emitted by the diffuser plate 350, and then reflected by the 45-degree semi-transparent and semi-reflective lens 360, and finally vertically irradiated to the surface of the object to be measured. In this way, the mirror-like object to be measured whose surface is parallel to the sample table 100 and is flat can be highlighted, thereby further improving the detection accuracy.

[0048] Furthermore, the coaxial light source assembly 300 further includes a second chamber 380 disposed inside the housing 320, the second chamber 380 being disposed on one side of the first chamber 330, and a heat sink 390 being disposed in the first chamber 330. Furthermore, a plurality of heat dissipation holes 321 are disposed on one side of the housing 320 close to the heat sink 390. Specifically, this embodiment can improve the heat dissipation effect.

[0049] Furthermore, a transparent protective cover 371 is provided at the inlet 370. Specifically, this will not block the lens and can prevent foreign matter from entering the coaxial light source assembly 300 and causing damage.

[0050] Further, the housing 210 includes an annular Z-shaped bottom housing 211, an annular intermediate housing 212, and an annular cover plate 213; the intermediate housing 212 is connected to the bottom of the Z-shaped bottom housing 211 by screws, and the cover plate 213 is connected to the bottom of the intermediate housing 212 by screws;

[0051] A first slot 214 is provided at the top of the bottom shell, and a first step 215 is formed between the inner wall of the bottom shell and the upper surface of the intermediate shell 212; two ends of the first annular light board 220 are respectively clamped in the first slot 214 and the first step 215;

[0052] A second slot 216 is disposed on the top of the intermediate shell 212 , and the inner wall of the intermediate shell 212 and the upper surface of the cover plate 213 form a second step 217 ; both ends of the second annular light panel 230 are respectively clamped in the second slot 216 and the second step 217 .

[0053] Specifically, this embodiment can stably and reliably connect the first annular light panel 220 and the second annular light panel 230 to the housing 210 .

[0054] Furthermore, the first annular light board 220 is connected to a first power line 222, and the first power line 222 is electrically connected to the first lamp bead 221, the main power supply, and the controller 400. The first power line 222 supplies power to the first annular light board 220, and the controller 400 can control the main power supply to supply power to the first lamp bead 221 on the first annular light board 220.

[0055] Further, the second annular light board 230 is connected to a second power line 232, and the second power line 232 includes four branches, which are electrically connected to the red chip, green chip, blue chip and white light chip of the second lamp bead 231 respectively, and the four branches are also electrically connected to the main power supply and the controller 400. The controller 400 controls the four branches of the first power line 222 to supply power to the red chip, green chip, blue chip and white light chip of the second lamp bead 231 respectively. Specifically, when the first lamp bead 221 excites the color of the fluorescent substance of the object to be measured, in order to avoid interference between the first lamp bead 221 and the second lamp bead 231, the controller 400 controls the chips of the same color in the second lamp bead 231 to turn off. For example, if the color of the fluorescent substance of the object to be measured excited by the first lamp bead 221 is red, the controller 400 controls the red chip of the second lamp bead 231 to turn off or adjust the brightness of the red chip, and then controls the green chip, blue chip and white light chip to turn on.

[0056] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A device for PCB board detection, characterized in that: include: A sample table, which is horizontally arranged and used to place the object to be measured; A combined annular light source is arranged above the sample table; The combined annular light source comprises a housing, a first annular light plate and a second annular light plate arranged in the housing, wherein the first annular light plate and the second annular light plate have the same inclination angle; the first annular light plate is coaxially arranged above the second annular light plate; a plurality of first lamp beads for exciting fluorescent substances are arranged at intervals along the circumference of the inner wall of the first annular light plate; a plurality of second lamp beads are arranged along the circumference of the inner wall of the second annular light plate, and the second lamp beads include a red chip, a green chip, a blue chip and a white light chip; A coaxial light source assembly is connected to the top of the combined annular light source, and an outlet is provided at the bottom of the coaxial light source assembly, and the projection of the outlet on the horizontal plane is located within the projection of the light emitting surface of the combined annular light source on the horizontal plane; A controller, used to control the current of the red chip of the second lamp bead, the current of the green chip, the current of the blue chip and the current of the first lamp bead; the controller also controls the current of the coaxial light source assembly; A color camera has a lens connected to the bottom; the lens is coaxially arranged with the combined annular light source.

2. The device for PCB board detection according to claim 1, characterized in that: The first annular light panel is provided with a plurality of circles of first light beads; And / or, the second annular light panel is provided with a plurality of circles of second lamp beads.

3. The device for PCB board detection according to claim 1, characterized in that: The first lamp bead is a UV lamp bead.

4. The device for PCB board detection according to claim 1, characterized in that: The coaxial light source assembly includes a shell, a first chamber is provided in the shell, a vertically arranged third light board, a vertically arranged diffuser plate and a semi-transparent and semi-reflective lens are provided in the first chamber; the third light board is arranged in parallel on one side of the diffuser plate, and the semi-transparent and semi-reflective lens is arranged on the other side of the diffuser plate at an angle of 45 degrees; the diffuser plate and the semi-transparent and semi-reflective lens are arranged to form an outlet at the bottom of the shell; an inlet is provided at the top of the shell, directly above the outlet.

5. The device for PCB board detection according to claim 4, characterized in that: The coaxial light source assembly further includes a second chamber disposed inside the housing, the second chamber being disposed on one side of the first chamber, and a heat sink being disposed in the first chamber.

6. The device for PCB board detection according to claim 5, characterized in that: A transparent protective cover is arranged at the inlet.

7. The device for PCB board detection according to claim 6, characterized in that: A plurality of heat dissipation holes are arranged on one side of the shell close to the heat sink.

8. The device for PCB board detection according to claim 1, characterized in that: The housing comprises an annular Z-shaped bottom housing, an annular intermediate housing and an annular cover plate; the intermediate housing is connected to the bottom of the Z-shaped bottom housing, and the cover plate is connected to the bottom of the intermediate housing; A first slot is provided on the top of the bottom shell, and the inner wall of the bottom shell and the upper surface of the intermediate shell form a first step; two ends of the first annular light board are respectively clamped in the first slot and the first step; A second slot is provided on the top of the intermediate shell, and the inner wall of the intermediate shell and the upper surface of the cover plate form a second step; two ends of the second annular light panel are respectively clamped in the second slot and the second step.

9. The device for PCB board detection according to claim 1, characterized in that: The first annular light panel is connected to a first power line, and the first power line is electrically connected to the first lamp bead, a main power supply and a controller; And / or, the second annular light panel is connected to a second power cord, the second power cord includes four branches, the four branches are electrically connected to the red chip, green chip, blue chip and white light chip of the second lamp bead respectively, and the four branches are also electrically connected to the main power supply and the controller.

10. The device for PCB board detection according to claim 1, characterized in that: The inclination angles of the first annular light panel and the second annular light panel are both 30°±10°.

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