Visual inspection device

Abstract

The visual inspection device comprises a mounting frame, a camera, a light barrier and light source assemblies, the camera, the light barrier and the light source assemblies are all mounted on the mounting frame, the camera is arranged downwards, the light barrier is arranged right above the camera and in the overlook projection and the first horizontal direction, and the two light source assemblies are located on the two opposite sides of the camera respectively; the visual inspection device further comprises a camera fixing seat and a linear part arranged in the vertical direction, the linear part is fixedly connected with the mounting frame, the camera fixing seat is adjustably connected to the linear part in the vertical direction, and the camera is connected to the camera fixing seat; the mounting frame further comprises a rotary connecting base, and the light source assembly is rotatably connected to the rotary connecting base around the axis. The visual inspection device provided by the utility model has good adjustability, better universality and adaptability, and improves the visual identification accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of automated detection equipment, in particular to a visual detection device. Background Art

[0002] In automated production, visual inspection devices are used to identify and inspect workpieces or assemblies. The visual inspection device mainly includes a mounting frame and a downward-facing camera. Since ambient light can affect the visual system, resulting in inaccurate visual recognition, the visual inspection device also includes a light shield for blocking ambient light and a light source for fill light. The light shield is located directly above the camera, and the light source is generally set on the left and right sides of the mounting frame.

[0003] The problem with the existing visual inspection device is that different workpieces or assemblies have different volumes, recognition heights and recognition ranges, and the light source and camera with completely fixed positions cannot be adjusted on the spot to cope with the differences in recognition heights and recognition ranges. Therefore, the problem of inaccurate visual recognition still exists. Utility Model Content

[0004] The utility model aims to provide a visual inspection device with good adjustable capability.

[0005] The visual inspection device provided by the utility model comprises a mounting frame, a camera, a light baffle and a light source assembly, wherein the camera, the light baffle and the light source assembly are all mounted on the mounting frame, the camera is arranged downward, the light baffle is arranged directly above the camera, and in a top-down projection, in a first horizontal direction, the two light source assemblies are respectively located on opposite sides of the camera; the visual inspection device also comprises a camera fixing seat and a straight line component arranged vertically, the straight line component is fixedly connected to the mounting frame, the camera fixing seat is adjustably connected to the straight line component vertically, and the camera is connected to the camera fixing seat; the mounting frame also comprises a rotating connecting seat, and the light source assembly is rotatably connected to the rotating connecting seat around an axis.

[0006] It can be seen from the above scheme that under this setting, the camera can be adjusted up and down, and the light direction of the light source assembly can be adjusted. In this way, the camera shooting height and the angle adjustment of the two light source assemblies make the irradiation range adjustable, and can be adjusted in real time on the spot according to the height and size of the workpiece to be identified. The irradiation angle can also be further adjusted in combination with the ambient light intensity, ambient light irradiation direction and ambient light irradiation angle of the current time period. Therefore, the visual inspection device of the utility model has good adjustability, better versatility and adaptability, and improves the accuracy of visual recognition.

[0007] A further solution is that the visual inspection device also includes a first screw and an adjustable connecting frame, an elongated hole is arranged on the adjustable connecting frame, the elongated hole penetrates along the first horizontal direction and extends axially; the mounting frame, the adjustable connecting frame and the rotating connecting seat are connected in sequence, and the first screw passes through the elongated hole and cooperates with the horizontal part thread, and the position of the adjustable connecting frame can be adjusted axially.

[0008] As can be seen from the above, under this setting, the position of the light source assembly can also be adjusted in translation and can be locked, so the adjustable freedom of the irradiation center is greater, which can better solve the fill light problem for workpieces of different sizes.

[0009] A further solution is that the visual detection device also includes a second screw, and an arc hole around the axis is provided on the rotating connecting seat. After the second screw passes through the arc hole, it is threadedly engaged with the light source assembly.

[0010] A further solution is that when the second screw is located at the extended midpoint of the arc hole, the light emitting surface of the light source assembly faces downward.

[0011] It can be seen from the above that the cooperation between the arc hole and the second screw realizes the rotation adjustment of the light source assembly and has a locking effect. A better solution is to limit the rotation range of the light source assembly to the maximum required range, that is, between the two opposite horizontal directions and the vertical downward direction. This can have an anti-mistake effect and prevent excessive unidirectional rotation from pulling on the wires or even breaking them.

[0012] Another further solution is that the straight component is a profile, and the outer periphery of the straight component forms a vertical T-slot; the visual inspection device also includes a bolt and a nut, and the bolt passes through the camera fixing seat and is locked with the nut; the nut of the bolt is located in the T-slot, or the nut is located in the T-slot.

[0013] As can be seen from the above, under this setting, while ensuring that the camera has the ability to be adjusted vertically, the device components are easy to produce and easy to assemble.

[0014] A further solution is that at least two T-slots are provided on the same side of the linear component, and the camera fixing seat cooperates with the two T-slots.

[0015] As can be seen from the above, this setting can ensure the installation stability of the camera.

[0016] Another further solution is that, in the top-down direction, the light blocking plate completely shields the camera and all light source components.

[0017] As can be seen from the above, this setting can increase the light blocking area of ​​the light blocking plate, improve the light blocking effect of the light blocking plate, and further eliminate the influence of ambient light on visual recognition.

[0018] Another further solution is that the light source assembly and the straight component are at the same height.

[0019] As can be seen from the above, this setting makes it easier for the staff to coordinate the adjustment of the camera and the light source assembly. In addition, this setting is also conducive to installing the light source assembly and the linear component on the stand-type device.

[0020] Another further solution is that the axial direction is a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

[0021] In another further solution, the mounting frame includes a vertical portion and a horizontal portion, wherein the horizontal portion is bent and extended from the top end of the vertical portion; the visual inspection device also includes a bracket, wherein the bracket is connected to the horizontal portion, and the light shielding plate is supported on the bracket.

[0022] As can be seen from the above, the bracket can lift the light baffle to prevent the light baffle from being too close to the linear component and the rotating connector and affecting the adjustment of the camera and light source assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of the first viewing angle of an embodiment of the visual inspection device of the utility model.

[0024] Figure 2 This is a structural diagram of the second viewing angle of an embodiment of the visual inspection device of the utility model.

[0025] Figure 3 It is a partial view of an embodiment of the visual inspection device of the present utility model.

[0026] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0027] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0028] Figure 6 It is a partial view of the third viewing angle of the visual inspection device embodiment of the utility model.

[0029] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0030] Figure 8 This is a structural diagram of the fourth viewing angle of an embodiment of the visual inspection device of the utility model. DETAILED DESCRIPTION

[0031] See also Figure 1 and Figure 2 The visual inspection device of this embodiment includes a mounting frame 1, a light baffle 2, a camera 3, a light source assembly 4, a straight component 51, a camera fixing seat 52, an adjustable connecting frame 53, a rotating connecting seat 54, a bracket 55, and a first screw, a second screw, a bolt and a nut not shown. Figure 1In the coordinate system shown, the x-axis direction represents the first horizontal direction of the present invention, the y-axis direction represents the second horizontal direction of the present invention, and the z-axis direction represents the vertical direction.

[0032] The mounting frame 1 is a vertical frame, and the mounting frame 1 includes a vertical portion 11 and a horizontal portion 12. The horizontal portion 12 is bent from the top of the vertical portion 11 and extends forward, and the area below the horizontal portion 12 becomes a workpiece identification area. In addition, both the vertical portion 11 and the horizontal portion 12 are double-rod structures, that is, the vertical portion 11 and the horizontal portion 12 each include two symmetrical rod bodies, and the two rod bodies are connected and fixed by a cross bar. The light shield 2, the camera 3 and the light source assembly 4 are all mounted on the horizontal portion 12.

[0033] Combination Figure 3 First, two brackets 55 are connected to the upper sides of the two rods of the horizontal portion 12, and the light shield 2 is fixed and supported on the two brackets 55. In this embodiment, the light shield 2 is a square with rounded corners, and the area of ​​the light shield 2 is large enough to completely cover the camera 3 and the light source assembly 4 below it. Figure 8 , that is, in the top-view direction, the light blocking plate 2 completely blocks the camera 3 and all light source components 4 .

[0034] Recombination Figure 4 and Figure 5 , two adjustable connecting frames 53 are respectively connected to the corresponding horizontal parts 12 in a left-right symmetrical manner. The adjustable connecting frame 53 is an angle iron profile with an "L"-shaped cross-section. The adjustable connecting frame 53 extends along the y-axis direction, and includes a first wall body 531 and a second wall body 532 connected by a right-angle bend. The first wall body 531 is provided with an elongated hole 530 that penetrates both sides of its thickness along the x-axis direction, and the elongated hole 530 extends along the y-axis direction. After the first screw passes through the elongated hole 530, it is threadedly engaged with the first screw hole 120 on the side of the horizontal part 12, so that the adjustable connecting frame 53 is fixedly connected to the horizontal part 12, and by screwing the first screw, the position of the adjustable connecting frame 53 can be adjusted along the y-axis direction.

[0035] At this time, the second wall 532 faces downward, and on each adjustable connecting frame 53, two rotating connecting seats 54 are respectively connected to the opposite ends of the y-axis direction on the lower side of the second wall 532, and the light source assembly 4 is connected between the two rotating connecting seats 54. In this way, the two light source assemblies 4 are symmetrically arranged on the opposite sides of the mounting frame 1 in the x-axis direction.

[0036] The light source assembly 4 extends in the y-axis direction into an elongated shape, and the axial ends of the light source assembly 4 are respectively connected to two rotating connection seats 54, and the light source assembly 4 can rotate around the axis 400 extending along the y-axis direction. Furthermore, an arc hole 540 around the axis 400 is provided on the wall of the rotating connection seat 54, and the arc hole 540 penetrates through both sides of the thickness of the wall of the rotating connection seat 54 along the y-axis direction. The arc hole 540 extends about half a circle around the axis 400, and the second screw passes through the arc hole 540 and then is threadedly engaged with the second screw hole 40 on the light source assembly 4. By screwing the second screw, the light source assembly 4 can rotate around the axis 400, thereby adjusting the direction of the light emitting surface 41 of the light source assembly 4.

[0037] Further, see Figure 3 and Figure 4 When the second screw hole 40 on the light source assembly 4 is located at the midpoint of the arc hole 540, the light emitting surface 41 faces directly downward. Since the arc hole 540 is approximately half a circle, the direction of the light emitting surface 41 will not be higher than the horizontal direction regardless of whether the light source assembly 4 rotates clockwise or counterclockwise. In this way, the second screw cooperates with the arc hole 540 to limit the direction of the light emitting surface 41 between two opposite horizontal directions and the vertical downward direction.

[0038] See also Figure 6 and Figure 7 In this embodiment, the linear component 51 is an aluminum profile. Two T-slots 510 extending vertically are arranged on the surfaces of the four directions of the outer circumference of the linear component 51. The bolts are passed through the through holes 520 of the camera fixing seat 52 and then locked with the nuts. Optionally, the nut of the bolt is located in the T-slot 510, or the nut is located in the T-slot 510. In this way, the camera fixing seat 52 and the wall of the notch of the T-slot 510 can be clamped by the nut of the bolt and the nut, so that the camera fixing seat 52 is fixedly connected to the linear component 51, and the camera 3 is fixedly installed on the camera fixing seat 52. In this way, the vertical position of the camera fixing seat 52 and the camera 3 thereon can be adjusted by screwing the bolts or nuts.

[0039] Therefore, the camera 3 can be adjusted up and down and the light output direction of the light source assembly 4 can be adjusted. In this way, the shooting height of the camera 3 and the angle adjustment of the two light source assemblies 4 make the illumination range adjustable, and can be adjusted in real time on the spot according to the height and size of the workpiece to be identified. Therefore, the visual inspection device of the utility model has good adjustability, better versatility and adaptability, and improves the accuracy of visual recognition.

[0040] In other embodiments, the extension direction of the axis of the light source assembly may be a non-horizontal direction, and, in a top view projection, the extension direction of the axis of the light source assembly is not perpendicular to the first horizontal direction, but forms an angle of 60 degrees, 70 degrees, 80 degrees or other non-zero angle with the first horizontal direction.

[0041] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A visual inspection device, comprising a mounting frame, a camera, a light baffle and a light source assembly, wherein the camera, the light baffle and the light source assembly are all mounted on the mounting frame, the camera is arranged downward, the light baffle is arranged directly above the camera, and in a top view projection, two light source assemblies are respectively located on opposite sides of the camera in a first horizontal direction; Features: The visual inspection device further comprises a camera fixing seat and a straight line component arranged in a vertical direction, wherein the straight line component is fixedly connected to the mounting frame, the camera fixing seat is adjustably connected to the straight line component in a vertical direction, and the camera is connected to the camera fixing seat; The mounting bracket also includes a rotating connection seat, and the light source assembly is rotatably connected to the rotating connection seat around an axis.

2. The visual inspection device according to claim 1, characterized in that: The visual inspection device further includes a first screw and an adjustable connecting frame, wherein the adjustable connecting frame is provided with an elongated hole, the elongated hole penetrates along a first horizontal direction and extends along the axial direction of the axis; The mounting frame, the adjustable connecting frame and the rotating connecting seat are connected in sequence, the first screw passes through the elongated hole and then engages with the horizontal portion thread, and the position of the adjustable connecting frame can be adjusted along the axial direction.

3. The visual inspection device according to claim 2, characterized in that: The visual detection device also includes a second screw. The rotating connection seat is provided with an arc hole around the axis. The second screw passes through the arc hole and then engages with the light source assembly through a thread.

4. The visual inspection device according to claim 3, characterized in that: When the second screw is located at the extended midpoint of the arc hole, the light emitting surface of the light source assembly faces downward.

5. The visual inspection device according to claim 2, characterized in that: The straight part is a profile, and a vertical T-shaped groove is formed on the outer periphery of the straight part; The visual inspection device further comprises a bolt and a nut, wherein the bolt passes through the camera fixing seat and is locked with the nut; The nut of the bolt is located in the T-slot, or the nut is located in the T-slot.

6. The visual inspection device according to claim 5, characterized in that: At least two T-slots are arranged on the same side of the linear component, and the camera fixing seat cooperates with the two T-slots.

7. The visual inspection device according to any one of claims 1 to 6, characterized in that: In a top-view direction, the light blocking plate completely shields the camera and all the light source components.

8. The visual inspection device according to any one of claims 1 to 6, characterized in that: In the vertical direction, the light source assembly and the straight component are at the same height.

9. The visual inspection device according to any one of claims 1 to 6, characterized in that: The axial direction of the axis is a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

10. The visual inspection device according to any one of claims 1 to 6, characterized in that: The mounting frame comprises a vertical portion and a horizontal portion, wherein the horizontal portion is bent and extended from the top end of the vertical portion; The visual inspection device further comprises a bracket, wherein the bracket is connected to the horizontal portion, and the light blocking plate is supported on the bracket.

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