A machine vision detection device with high-precision positioning

Abstract

The present invention belongs to the field of visual inspection, and specifically relates to a high-precision positioning machine vision inspection device, comprising a frame and a lens barrel moving mechanism, a photographing positioning mechanism and a lens moving mechanism, wherein the lens barrel moving mechanism comprises a first cross module and a lens barrel tray arranged on the moving end of the first cross module, the lens moving mechanism comprises a second cross module and a vacuum suction nozzle arranged on the moving end of the second cross module, the photographing positioning mechanism comprises a camera moving module and a camera arranged on the moving end of the camera moving module, a beam splitter is arranged in front of the lens of the camera, and the beam splitting surface of the beam splitter is arranged tilted relative to the lens, the present invention only needs one camera to photograph and position the lens and the lens barrel respectively located on the upper and lower sides, thereby saving costs, and position compensation can be performed during photographing positioning, so the positioning accuracy is higher, and the assembly between the lens and the lens barrel is more efficient and accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of visual inspection, and in particular relates to a high-precision positioning machine visual inspection device. Background Art

[0002] Optical lenses are important components in the field of machine vision and are widely used in all aspects of machine vision image acquisition. With the increasing degree of automation, the application demand for lenses is increasing. It is essential to assemble the lenses on the lens barrel in the lens production process. Generally, automated assembly is adopted, which is to first take pictures of the lenses and the lens barrel for alignment through a visual inspection device, and then install the lenses on the lens barrel. However, the visual inspection devices in the prior art need to use multiple cameras to take pictures of the lens barrel and the lenses respectively in order to locate the two, which is costly and has low accuracy. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a machine vision detection device with high-precision positioning.

[0004] The invention provides a high-precision positioning machine vision detection device, comprising a frame and a lens barrel moving mechanism, a photographing positioning mechanism and a lens moving mechanism which are sequentially arranged from bottom to top along the height direction of the frame, wherein the lens barrel moving mechanism comprises a first cross module and a lens barrel tray arranged on the moving end of the first cross module, the lens moving mechanism comprises a second cross module and a vacuum suction nozzle arranged on the moving end of the second cross module, the photographing positioning mechanism comprises a camera moving module and a camera arranged on the moving end of the camera moving module, a beam splitter is arranged in front of the lens of the camera, a beam splitter surface of the beam splitter is arranged tilted relative to the lens, and lenses and the lens barrel located on the upper and lower sides of the beam splitter are photographed by the camera simultaneously under the refraction of the beam splitter surface.

[0005] Furthermore, a mounting frame is provided on the frame below the second cross module, and the camera moving module is fixed on the mounting frame.

[0006] Furthermore, the first cross module includes a first X-axis moving component and a first Y-axis moving component arranged on a moving end of the first X-axis moving component, and the lens barrel tray is arranged on the moving end of the first Y-axis moving component.

[0007] Furthermore, the second cross module includes a second Y-axis moving component and a Z-axis moving component arranged on the moving end of the second Y-axis moving component, and the vacuum nozzle is arranged on the moving end of the Z-axis moving component.

[0008] Furthermore, the camera moving module includes a second X-axis moving component, and the camera is arranged on the moving end of the second X-axis moving component.

[0009] Furthermore, the lens axis of the camera is arranged along the X-axis direction, and the beam splitting surface of the beam splitter is arranged to be inclined at degrees relative to the lens axis.

[0010] Furthermore, a spectroscope mounting seat is arranged in front of the lens of the camera, and a first optical path channel and a second optical path channel which are interconnected are opened in the spectroscope mounting seat. The first optical path channel is arranged coaxially with the camera lens, and the second optical path channel is arranged along the Z-axis direction. The spectroscope is arranged at the intersection of the first optical path channel and the second optical path channel.

[0011] The beneficial effects of the present invention are that the overall structure is optimized and the number of cameras is reduced. By setting a beam splitter, only one camera is needed to carry out photographic positioning of the lens and the lens barrel located on the upper and lower sides respectively, thereby saving costs. When photographing and positioning, the first cross module, the camera moving module and the second cross module work in coordination and perform position compensation together, so the positioning accuracy is higher and the assembly between the lens and the lens barrel is more efficient and precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention from a first viewing angle;

[0013] Figure 2 It is a structural schematic diagram of the second viewing angle of the present invention;

[0014] Figure 3 It is a structural schematic diagram of the lens barrel moving mechanism in the present invention;

[0015] Figure 4 It is a structural schematic diagram of the photographing and positioning mechanism in the present invention;

[0016] Figure 5 It is a partial structural schematic diagram of the lens moving mechanism in the present invention;

[0017] Figure 6 It is a schematic diagram of the cooperation between the camera and the beam splitter in the present invention.

[0018] In the figure, 10-frame; 11-mounting frame; 20-first cross module; 21-first X-axis moving assembly; 22-first Y-axis moving assembly; 30-lens barrel tray; 40-camera moving module; 50-camera; 51-beam splitter; 52-beam splitter mounting seat; 521-first optical path channel; 522-second optical path channel; 60-second cross module; 61-second Y-axis moving assembly; 62-Z-axis moving assembly; 70-vacuum nozzle. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the following is a further detailed description of a high-precision positioning machine vision detection device of the present invention in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "center", "longitudinal", "lateral", "up", "down", "left", "right", "inside", "outside", "front end", "rear end", "head", "tail", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0022] like Figure 1-6As shown, the present invention provides a high-precision positioning machine vision detection device, including a frame 10, on which a lens barrel moving mechanism, a photographing positioning mechanism and a lens moving mechanism are arranged, and the positions of the lens barrel moving mechanism, the photographing positioning mechanism and the lens moving mechanism on the frame 10 are arranged in sequence from bottom to top along the height direction of the frame 10, that is, the photographing positioning mechanism is located between the lens moving mechanism and the lens barrel moving mechanism, the lens barrel moving mechanism includes a first cross module 20 and a lens barrel tray 30 arranged on the moving end of the first cross module 20, and the lens barrel tray 30 is used to place the lens barrel, and when the first cross module 20 moves, it can drive the lens barrel to move in two directions, so that the lens barrel moves with higher precision when taking photos and positioning. The lens moving mechanism includes a second cross module 60 and a vacuum suction nozzle 70 arranged on the moving end of the second cross module 60, and the suction end of the vacuum suction nozzle 70 is arranged downward along the direction of the Z axis, and the vacuum suction nozzle 70 is used to absorb the lens, and after the vacuum suction nozzle 70 absorbs the lens, the lens moves following the moving end of the second cross module 60. The photographing positioning mechanism comprises a camera moving module 40 and a camera 50 arranged on the moving end of the camera moving module 40. The camera 50, the first cross module 20, the camera moving module 40 and the second cross module 60 are electrically connected to an external controller. The external controller controls the coordinated work between the camera 50, the first cross module 20, the camera moving module 40 and the second cross module 60. A beam splitter 51 is arranged in front of the lens of the camera 50. The beam splitter surface of the beam splitter 51 is tilted relative to the lens. Specifically, the installation direction of the camera 50 is parallel to the horizontal plane. The lens axis of the camera 50 is arranged along the X-axis direction, that is, the lens axis of the camera 50 is parallel to the X-axis, and the beam splitter surface of the beam splitter 51 is tilted at 45° relative to the lens axis, that is, the beam splitter surface of the beam splitter 51 is tilted at 45° relative to the lens. When the lens moves to the top of the beam splitter 51 and the lens barrel moves to the bottom of the beam splitter 51, due to the characteristics of the beam splitter, the lens and the lens barrel are simultaneously photographed and positioned by the same camera 50 under the refraction of the beam splitter surface. Among them, a plurality of lens barrel brackets are arranged on the lens barrel tray 30, that is, one lens barrel tray 30 can hold a plurality of lens barrels, which can reduce the frequency of loading the lens barrels.

[0023] The machine vision detection device provided by the present invention optimizes the overall structure and reduces the number of cameras 50. By setting a spectrometer 51, only one camera 50 is needed to carry out photographic positioning of the lens and the lens barrel respectively located on the upper and lower sides, thereby saving costs and reducing the complexity of the photographic positioning structure, making the overall structure more concise. During photographic positioning, the first cross module 20, the camera moving module 40 and the second cross module 60 work in coordination and perform position compensation together, so that the positioning accuracy is higher, making the assembly between the lens and the lens barrel more efficient and accurate.

[0024] A mounting frame 11 is fixedly disposed on the frame 10 , and the mounting frame is located below the second cross module 60 . The camera moving module 40 is fixed on the mounting frame 11 to ensure the stability of the camera moving module 40 when working.

[0025] The first cross module 20 includes a first X-axis moving assembly 21 and a first Y-axis moving assembly 22 disposed on the moving end of the first X-axis moving assembly 21, and the lens barrel tray 30 is disposed on the moving end of the first Y-axis moving assembly 22, so that the lens barrel can move in both the X-axis and Y-axis directions. The second cross module 60 includes a second Y-axis moving assembly 61 and a Z-axis moving assembly 62 disposed on the moving end of the second Y-axis moving assembly 61, and the vacuum suction nozzle 70 is disposed on the moving end of the Z-axis moving assembly 62, so that the lens can move in both the Y-axis and Z-axis directions. The camera moving module 40 includes a second X-axis moving assembly, and the camera 50 is disposed on the moving end of the second X-axis moving assembly, so that the camera 50 can move along the X-axis direction. Among them, the second Y-axis moving component 61 is used for position compensation during positioning, and the Z-axis moving component 62 is used to place the lens on the lens barrel. Specifically, when the positioning is completed, the camera 50 withdraws from between the lens and the lens barrel under the drive of the second X-axis moving component, and the Z-axis moving component 62 drives the lens to move downward through the vacuum suction nozzle 70, so that the lens is placed on the lens barrel.

[0026] A beam splitter mounting seat 52 is arranged in front of the lens of the camera 50, and an optical path channel is opened in the beam splitter mounting seat 52, and the optical path channel is used for light to pass through. The optical path channel includes a first optical path channel 521 and a second optical path channel 522, and the first optical path channel 521 and the second optical path channel 522 are connected to each other. The first optical path channel 521 is coaxially arranged with the lens of the camera 50, that is, the first optical path channel 521 is also arranged along the X-axis direction, and the second optical path channel 522 is arranged along the Z-axis direction, that is, the second optical path channel 522 is perpendicular to the first optical path channel 521, so that the optical path channel is T-shaped, and the beam splitter 51 is arranged at the intersection of the first optical path channel 521 and the second optical path channel 522, and the end of the first optical path channel 521 away from the second optical path channel 522 is arranged toward the camera 50, and the two ends of the second optical path channel are arranged upward and downward respectively, that is, the two ends of the second optical path channel correspond to the lens and the lens barrel respectively.

[0027] The working principle of the present invention is as follows: the lens barrel is transported to the lens barrel tray 30 through the lens barrel loading mechanism, the lens is transported to the vacuum suction nozzle 70 through the lens loading mechanism and is adsorbed by the vacuum suction nozzle, the second Y-axis moving component 61 drives the lens to move along the Y-axis, the first cross module 20 drives the lens barrel to move along the X-axis and the Y-axis, the second X-axis moving component drives the camera 50 to move along the X-axis, so that the lens, the beam splitter 51 and the lens barrel are located on the same vertical straight line, under the action of the beam splitter 51, the camera 50 simultaneously takes pictures and positions the lens and the lens barrel, the second Y-axis moving component 61, the second X-axis moving component and the first cross module 20 work in coordination to perform position compensation, after the positioning is completed, the camera 50 withdraws from between the lens and the lens barrel under the drive of the second X-axis moving component, and the Z-axis moving component 61 drives the lens to move downward so that the lens is placed on the lens barrel.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-precision positioning machine vision detection device, characterized in that: The invention comprises a frame (10) and a lens barrel moving mechanism, a photographing positioning mechanism and a lens moving mechanism which are arranged in sequence from bottom to top along the height direction of the frame (10). The lens barrel moving mechanism comprises a first cross module (20) and a lens barrel tray (30) arranged on the moving end of the first cross module (20). The lens moving mechanism comprises a second cross module (60) and a vacuum suction nozzle (70) arranged on the moving end of the second cross module (60). The photographing positioning mechanism comprises a camera moving module (40) and a camera (50) arranged on the moving end of the camera moving module (40). A beam splitter (51) is arranged in front of the lens of the camera (50). The beam splitter surface of the beam splitter (51) is arranged tilted relative to the lens. The lenses and the lens barrel located on the upper and lower sides of the beam splitter (51) are photographed simultaneously by the camera (50) under the refraction of the beam splitter surface.

2. The high-precision positioning machine vision detection device according to claim 1, characterized in that: A mounting frame (11) is provided on the frame (10) below the second cross module (60), and the camera moving module (40) is fixed on the mounting frame (11).

3. The high-precision positioning machine vision detection device according to claim 1, characterized in that: The first cross module (20) comprises a first X-axis moving component (21) and a first Y-axis moving component (22) arranged on the moving end of the first X-axis moving component (21), and the lens barrel tray (30) is arranged on the moving end of the first Y-axis moving component (22).

4. The high-precision positioning machine vision detection device according to claim 3 is characterized in that: The second cross module (60) comprises a second Y-axis moving component (61) and a Z-axis moving component (62) arranged on the moving end of the second Y-axis moving component (61), and the vacuum suction nozzle (70) is arranged on the moving end of the Z-axis moving component (62).

5. The high-precision positioning machine vision detection device according to any one of claims 1 to 4, characterized in that: The camera moving module (40) comprises a second X-axis moving component, and the camera (50) is arranged on the moving end of the second X-axis moving component.

6. The high-precision positioning machine vision detection device according to claim 1, characterized in that: The lens axis of the camera (50) is arranged along the X-axis direction, and the beam splitting surface of the beam splitter (51) is arranged to be inclined at 45° relative to the lens axis.

7. The high-precision positioning machine vision detection device according to claim 5, characterized in that: A beam splitter mounting seat (52) is arranged in front of the lens of the camera (50), and a first light path channel (521) and a second light path channel (522) which are interconnected are opened in the beam splitter mounting seat (52), the first light path channel (521) is arranged coaxially with the lens of the camera (50), and the second light path channel (522) is arranged along the Z-axis direction, and the beam splitter (51) is arranged at the intersection of the first light path channel (521) and the second light path channel (522).

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