Imaging module for object positioning

Abstract

The utility model provides an imaging module for object positioning. The imaging module comprises an imaging assembly and a supporting assembly, the imaging assembly comprises an arc-shaped light source, a spectroscope and a backlight source; the supporting assembly comprises a supporting body and a cover plate. The arc-shaped light source is of a middle symmetrical structure, the spectroscope and the backlight source are sequentially and symmetrically placed with the symmetry axis of the arc-shaped light source as the center line, and the whole installed imaging assembly is of an axial symmetry structure. The backlight source is connected with the cover plate, the spectroscope is connected with the cover plate, the arc-shaped light source is connected with the supporting body, and the cover plate is fixedly assembled through the supporting body. Through matching with the semi-transparent and semi-reflective spectroscope and the customized light source, clear imaging can be performed on the object in three directions at the same time, the cost of the camera and other hardware is reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of hardware structure design, and in particular, to an imaging module for object positioning. Background Art

[0002] In modern industrial production, the precise positioning and assembly of workpieces are very important links, especially in automated assembly lines, where the positioning and detection of workpieces directly affect production efficiency and product quality. Traditional workpiece positioning and detection systems usually rely on a single camera and light source configuration, which has the following disadvantages:

[0003] 1. Imaging limitations:

[0004] A single camera and light source can usually only capture one end face or one direction of a workpiece, and cannot fully capture the entire picture of the workpiece; the images of the side and bottom surfaces of the workpiece cannot be clear at the same time, which can easily cause errors in the detection of the workpiece position and angle.

[0005] 2. High hardware cost:

[0006] In order to achieve multi-directional imaging, multiple cameras and light sources need to be configured, which increases the system cost; the coordination and synchronization of multi-camera systems are relatively complex, which increases the difficulty of system design and maintenance.

[0007] 3. Inefficiency:

[0008] The configuration and shooting process of multiple cameras and multiple light sources are complicated, resulting in reduced detection efficiency; traditional methods are difficult to meet the needs of production rhythm under high precision requirements.

[0009] The existing Chinese patent with publication number CN216174334U discloses a curved label detection device, including a conveyor belt, a detection mechanism and an information processor. The detection mechanism spans the conveyor belt, and the detection mechanism includes four cameras, two sets of high-brightness arc light sources, and four plane reflectors; the information processor is used to process the imaging information of the four cameras. Through the reasonable layout of light sources, cameras and reflectors, 360° all-round detection of product labels can be achieved, and the information processor is used to complete the comparison of label information instead of manual naked eye detection, which can not only improve the detection accuracy, but also effectively improve the detection efficiency of labels to meet industrial production needs. The disadvantages of this prior art are that the use scenario is single, the equipment has poor versatility, and there are limitations when processing objects of different shapes and materials. It is often necessary to customize specific grippers to match specific tasks; at the same time, it is easy to cause surface damage to objects when grasping fragile or soft objects. Summary of the invention

[0010] In view of the defects in the prior art, the purpose of this application is to provide an imaging module for object positioning, which aims to achieve multi-angle dynamic lighting effects through arc patterns on thin-walled parts and laser-engraved leather patterns, thereby overcoming the shortcomings of the prior art.

[0011] An imaging module for object positioning provided in the present application includes: an imaging component and a supporting component;

[0012] The imaging assembly includes an arc light source, a beam splitter and a backlight source; the supporting assembly includes a supporting body and a cover plate;

[0013] The arc light source is a middle symmetrical structure, the beam splitter and the backlight source are respectively placed symmetrically in sequence with the arc light source symmetry axis as the center line, and the imaging assembly after installation is an axisymmetric structure as a whole and a hollow workpiece reserved position is set in the center;

[0014] The backlight source is connected to the cover plate, the beam splitter is connected to the cover plate, the arc light source is connected to the support body, and the cover plate is fixedly assembled by the support body.

[0015] Preferably, the beam splitter is formed by splicing single lenses, the incident angle of the light path in the beam splitter splicing layer changes, and the imaging view is the side of the object.

[0016] Preferably, the incident light emitted by the arc-shaped light source can be reinforced by the backlight source.

[0017] Preferably, the imaging effect of the bottom surface of the object is enhanced via the beam splitter.

[0018] Preferably, the arc-shaped light source is an LED lamp light source, and the arc-shaped light source contains an LED wiring board.

[0019] Preferably, the support body is provided with a supporting portion for fixing the LED wiring board.

[0020] Preferably, the backlight source is connected to the cover plate by bolts.

[0021] Preferably, the beam splitter is connected to the cover plate by glue, and the support body clamps and fixes the beam splitter at the side.

[0022] Preferably, the support body and the cover plate are provided with wire outlet grooves.

[0023] Preferably, the center of the arc-shaped light source is concentric with the center of the field of view of the assembled support assembly within 5 mm above and below.

[0024] Compared with the prior art, this application has the following beneficial effects:

[0025] 1. This application changes the direction of light transmission through the design of beam splitter splicing, which can complement the light for the final image and make the image clearer.

[0026] 2. The present application uses an arc light source to evenly illuminate the arc surface of the object to be measured, and the light from the arc light source is reflected by the surface coating of the spectroscope to reduce the interference caused by high reflection, so that the lens can obtain a clear image.

[0027] 3. This application uses a semi-transparent and semi-reflective beam splitter and a customized light source to simultaneously capture clear images of an object in three directions, reducing the cost of cameras and other hardware. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0029] Figure 1 This is a schematic diagram of the overall parts of the imaging module mainly used for object positioning in this application;

[0030] Figure 2 This application mainly embodies the optical path schematic diagram of the imaging module used for object positioning;

[0031] Figure 3 This is a schematic diagram of the optical path of the spectroscope mainly embodied in this application;

[0032] Figure 4 This application mainly embodies the schematic diagram of the optical path of the imaging module optical path compensation for object positioning;

[0033] Figure 5 This is a schematic diagram of the principle of an imaging module mainly used for object positioning in this application;

[0034] Figure 6 This is a schematic diagram of the workpiece structure of Example 1 in the specific implementation of the imaging module for object positioning in this application;

[0035] Figure 7 This is a schematic diagram of the final imaging of Example 1 in the specific implementation of the imaging module for object positioning mainly embodied in this application;

[0036] Figure 8 This is a schematic diagram of the imaging module used for object positioning in this application;

[0037] Fig. 9 This application mainly embodies a schematic diagram of the overall parts of an imaging module used for object positioning.

[0038] As shown in the figure: 1. Arc light source; 2. Backlight source; 3. Beam splitter; 4. Cover plate; 5. Support body; 6. Workpiece; 7. Lens; 8. Camera. DETAILED DESCRIPTION

[0039] The present application is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present application. These all belong to the protection scope of the present application.

[0040] The imaging module for object positioning provided in the present application includes: an imaging component and a supporting component; the imaging component includes an arc light source 1, a beam splitter 3 and a backlight source 2; the supporting component includes a supporting body 5 and a cover plate 4; the arc light source 1 is an intermediate symmetrical structure, the beam splitter 3 and the backlight source 2 are respectively symmetrically placed in sequence with the symmetry axis of the arc light source 1 as the center line, and the imaging component after installation is an axisymmetric structure as a whole and a hollow workpiece 6 reserved position is arranged in the center; the backlight source 2 is connected to the cover plate 4, the beam splitter 3 is connected to the cover plate 4, the arc light source 1 is connected to the supporting body 5, and the cover plate 4 is fixedly assembled by the supporting body 5.

[0041] Specifically, the beam splitter 3 is formed by splicing single lenses. The incident angle of the light path changes at the splicing layer of the beam splitter 3, and the imaging view is the side of the object, such as Figure 1 As shown, the beam splitter 3 is formed by splicing prisms, and a glue layer is formed at the splicing point, and the light path is turned at the glue layer. The incident light emitted by the arc light source 1 can be reinforced by the backlight source 2. The imaging effect of the bottom surface of the object is reinforced by the beam splitter 3. The arc light source 1 is an LED light source, and the arc light source 1 contains an LED terminal block. The support body 5 is provided with a support portion for fixing the LED terminal block. The backlight source 2 is connected to the cover plate 4 by bolts. The beam splitter 3 is connected to the cover plate 4 by glue, and the support body 5 clamps and fixes the beam splitter 3 on the side. The support body 5 and the cover plate 4 are provided with wire outlet grooves. The center of the arc light source 1 is concentric with the center of the field of view of the assembled support assembly within 5 mm above and below.

[0042] The following provides a feasible embodiment of the present application.

[0043] Screw 6 is selected as workpiece 6 of Example 1. The imaging module for object positioning provided in this embodiment includes: an imaging component and a support component. The imaging component includes an arc light source 1, two beam splitters 3 and two backlight sources 2; the support component includes a support body 5 and upper and lower cover plates 4. The beam splitter 3 is a spliced ​​prism with a semi-transmissive and semi-reflective function. When a light source passes through the beam splitter 3, the propagation direction of the light path will be as follows: Figure 3The arc light source 1 is divided into two partitions in the middle, and when it is lit, the two sides of the screw 6 are backlit for imaging; the two backlight sources 2 are supplemented with light through the beam splitter 3 for imaging the side of the screw 6, and when they are lit together with the arc light source 1, the bottom of the screw 6 is imaged in the dark field, eliminating the reflection interference of the bright field imaging of the screw 6 and the screw bit; the beam splitter 3 reflects the side of the screw 6 through the internal reflection surface, and the beam splitter 3 glass compensates for the optical path difference, as shown in FIG. Figure 4 As shown. By compensating ΔL, the focus of the bottom surface of the side and front screw 6 is finally focused and consistent, and the bottom surface of the screw 6 and the side surface of the screw 6 can be clearly imaged at the same time, as shown Figure 5 As shown;

[0044] Working principle: When the imaging module used for object positioning works, it follows the following steps:

[0045] Step 1: The workpiece 6 approaches the detection position and reaches the detection position;

[0046] Step 2: The two partitions of the arc light source 1 and the backlight source 2 are simultaneously lit, and the camera 8 is triggered to take a photo, and a photo of the bottom surface of the workpiece 6 is taken to obtain an image of the workpiece 6 for positioning;

[0047] Step 3: After taking the photo, turn off all light sources;

[0048] Step 4: Turn on one of the two-partition light sources of the arc light source 1, trigger the camera 8 to take a picture, and image the side of the workpiece 6 through the semi-transparent and semi-reflective mirror;

[0049] Step 5: After taking the photo, turn off all light sources;

[0050] Step 6: Turn on the other of the two-partition light sources of the arc light source 1, and the camera 8 is triggered to take a picture, and the side of the workpiece 6 on the other side different from step 4 is reflected and imaged through the beam splitter 3;

[0051] Step 7: After taking the photo, turn off all light sources;

[0052] Step 8: Take three photos to get three images in total, and perform position alignment and correction on the workpiece 6 in turn.

[0053] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] The above describes the specific embodiments of the present application. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the substantive content of the present application. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An imaging module for object positioning, characterized in that: include: Imaging assembly and supporting assembly; The imaging component comprises an arc light source (1), a beam splitter (3) and a backlight source (2); the supporting component comprises a supporting body (5) and a cover plate (4); The arc light source (1) is a centrally symmetrical structure, the beam splitter (3) and the backlight source (2) are respectively symmetrically placed in sequence with the symmetry axis of the arc light source (1) as the center line, and the imaging component after installation is an axisymmetric structure as a whole and a hollow workpiece reserved position is arranged in the center; The backlight source (2) is connected to the cover plate (4), the beam splitter (3) is connected to the cover plate (4), the arc light source (1) is connected to the support body (5), and the cover plate (4) is fixedly assembled by the support body (5).

2. The imaging module for object positioning according to claim 1, characterized in that: The beam splitter (3) is formed by splicing single lenses, the incident angle of the light path in the splicing layer of the beam splitter (3) changes, and the imaging view is the side of the object.

3. The imaging module for object positioning according to claim 1, characterized in that: The incident light emitted by the arc-shaped light source (1) can be reinforced by the backlight source (2).

4. The imaging module for object positioning according to claim 1, characterized in that: The imaging effect of the bottom surface of the object is enhanced via the beam splitter (3).

5. The imaging module for object positioning according to claim 1, characterized in that: The arc-shaped light source (1) is an LED light source, and the arc-shaped light source (1) contains an LED wiring board.

6. The imaging module for object positioning according to claim 5, characterized in that: The support body (5) is provided with a supporting portion for fixing the LED wiring board.

7. The imaging module for object positioning according to claim 1, characterized in that: The backlight source (2) is connected to the cover plate (4) via bolts.

8. The imaging module for object positioning according to claim 1, characterized in that: The beam splitter (3) is connected to the cover plate (4) by glue, and the support body (5) clamps and fixes the beam splitter (3) at the side.

9. The imaging module for object positioning according to claim 1, characterized in that: The support body (5) and the cover plate (4) are provided with wire outlet grooves.

10. The imaging module for object positioning according to claim 1, characterized in that: The center of the arc-shaped light source (1) is concentric with the center of the field of view of the assembled support assembly within 5 mm above and below.

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