Sphere appearance detection device with double-arc curved surface light source

Abstract

The utility model provides a sphere appearance detection device with double arc-shaped curved surface light sources, which comprises a first turntable, a second turntable, a first arc-shaped curved surface light source and a second arc-shaped curved surface light source, the first arc-shaped curved surface light source and the second arc-shaped curved surface light source are oppositely arranged on the two sides of the detection area so that the opening of the first rotating disc can be located between the first arc-shaped curved surface light source and the second arc-shaped curved surface light source in the detection area. According to the sphere appearance detection device with the double-arc-shaped curved surface light source, the double-arc-shaped curved surface light source is used for lighting cooperatively, so that a bright and dark field effect is formed on the exposed surface of the sphere in the open hole, and the recognition degree of a detection image is improved so as to improve the detection quality.

Description

Technical Field

[0001] The utility model relates to the field of machine vision automated detection equipment, in particular to a spherical appearance detection device with a double-arc curved surface light source. Background Art

[0002] In the process of automated inspection using machine vision, due to the high reflectivity of spheres such as steel balls or ceramic balls due to their polishing process, the existing detection devices with cameras and lenses often have difficulty in capturing high-quality images of the sphere surface information for inspection. For example, when a commonly used ring light source is illuminated on the surface of a sphere, it will produce strong and bright reflections, which makes it difficult for the camera to obtain the contour and shape of the surface, seriously affecting subsequent inspection work. Figure 1 As shown in the figure, due to the high reflective nature of the sphere surface, direct light such as surface light source will produce strong reflection when irradiating the sphere surface, making the detection operation difficult. Figure 2 As shown; using a dome light source with diffuse reflection characteristics for lighting will reflect the curved surface of the upper part of the sphere into a flat surface, causing the graphic information to change and affecting the surface detection of the sphere, such as Figure 3 Therefore, it is necessary to provide a new detection device that can effectively reduce reflections, provide uniform lighting, and maintain the true features of the sphere surface, so as to improve the detection quality of the appearance of spheres. Utility Model Content

[0003] The present utility model is proposed in view of the above technical problems and provides a spherical appearance detection device with a dual-arc curved surface light source. The first arc curved surface light source and the second arc curved surface light source are used for coordinated lighting to construct a relatively closed lighting environment, thereby providing a guarantee for improving the detection quality.

[0004] According to a first aspect of an embodiment of the present invention, a spherical appearance detection device with a dual-arc curved surface light source is provided, which includes a first turntable, a second turntable, a first arc curved surface light source, and a second arc curved surface light source.

[0005] The first turntable is connected to a first motor, the first turntable is provided with openings around a circle, a support plate is provided below the first turntable, and the first motor drives the first turntable to rotate relative to the support plate;

[0006] The supporting plate has a notch, the second turntable is partially located in the notch so that the opening of the first turntable is located above the second turntable at the position of the notch, and the second turntable is connected to a second motor, which drives the second turntable to rotate;

[0007] The first arc-shaped curved surface light source and the second arc-shaped curved surface light source are relatively arranged on both sides of the notch so that the opening of the first turntable is located between the first arc-shaped curved surface light source and the second arc-shaped curved surface light source at the notch.

[0008] According to the second aspect of the embodiment of the utility model, a spherical appearance detection device with a dual-arc curved surface light source as in the first aspect is provided, wherein the first arc curved surface light source is arranged on the outside of the first turntable, and the lamp surface of the first arc curved surface light source is an inner arc surface.

[0009] According to the third aspect of the embodiment of the utility model, a spherical appearance detection device with a dual-arc curved surface light source as in the first aspect is provided, wherein the second arc curved surface light source is arranged on the inner side of the first turntable, and the lamp surface of the second arc curved surface light source is an outer arc surface.

[0010] According to a fourth aspect of an embodiment of the present utility model, a spherical appearance detection device with a dual-arc curved surface light source as in the second or third aspect is provided, wherein the first arc curved surface light source and the second arc curved surface light source are both non-bar structures.

[0011] This structure allows each arc-shaped curved surface light source to be closer to the sphere after installation, so as to cover the entire exposed area of ​​the sphere, making it easier for subsequent imaging of the sphere to cover the entire surface area, effectively improving the detection quality.

[0012] The beneficial effect of this utility model lies in that by placing curved light sources on either side of the inspection area, the first and second curved light sources simultaneously illuminate the upper portion of the sphere to be inspected in the inspection area, forming two bright fields on the exposed surface of the sphere. Simultaneously, the area between the two bright fields is also brightened, forming a relatively dark field. This creates a distinct bright and dark field effect on the sphere's surface, enabling clearer identification of various surface defects and morphological changes, effectively improving inspection quality.

[0013] With reference to the following description and the accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The included drawings are used to provide a further understanding of the present invention, which constitute a part of the specification, illustrate the preferred embodiments of the present invention, and are used to explain the principles of the present invention together with the written description, wherein the same elements are always represented by the same figure marks.

[0015] In the attached figure:

[0016] Figure 1This is an effect diagram of an image obtained by using a ring light source for lighting in the prior art;

[0017] Figure 2 This is an effect diagram of an image obtained by using a surface light source for lighting in the prior art;

[0018] Figure 3 This is an image effect diagram of an image obtained by using a dome light source for lighting in the prior art;

[0019] Figure 4 It is a three-dimensional structural diagram of the utility model;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the arc-shaped curved surface light source of the utility model;

[0021] Figure 6 This is a schematic diagram of the lighting method using a double-arc curved surface light source in the present invention;

[0022] Figure 7 This is a schematic diagram of using a double-arc curved surface light source to illuminate a sphere in the present invention;

[0023] Figure 8 This is a diagram showing the effect of using a double-arc curved surface light source to illuminate and obtain an image in the utility model. DETAILED DESCRIPTION

[0024] With reference to the accompanying drawings, the above and other features of the present invention will become apparent through the following description. In the description and the accompanying drawings, specific embodiments of the present invention are specifically disclosed, which show some embodiments in which the principles of the present invention can be adopted, and it should be understood that the present invention is not limited to the described embodiments.

[0025] The utility model provides a spherical appearance detection device with a double-arc curved surface light source. Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. As shown in the figure, the present invention is a spherical appearance detection device with a dual arc-shaped curved surface light source, comprising a first turntable 1, a second turntable 2, a first arc-shaped curved surface light source 3, and a second arc-shaped curved surface light source 4. The first turntable 1 is connected to a first motor (not shown in the figure). The first turntable 1 has a plurality of openings arranged around its edge. Preferably, Figure 4The figure shows that the first turntable is provided with two circles of openings to improve the detection efficiency. One of the diamond-shaped openings 11 is marked as an example in the figure. A support plate 5 is provided under the first turntable 1. The first motor drives the first turntable 1 to rotate relative to the support plate 5. In this way, the sphere to be detected can be placed in each opening of the first turntable 1 and contact the upper surface of the support plate 5. As the first turntable 1 rotates, it rolls and moves. The support plate 5 has a notch (not shown in the figure). Part of the disc body of the second turntable 2 is located in the notch of the support plate so that the opening of the first turntable 1 is located above the second turntable 2 at the notch position. The second turntable 2 is connected to a second motor (not shown in the figure), and the second motor drives the second turntable 2 to rotate. In this way, when the sphere to be detected is moved to the detection area at the notch position, it can contact the upper surface of the second turntable 2. Due to the rotation of the first turntable 1 and the second turntable 2, the unfolding effect of the sphere surface is improved. The first arc-shaped curved surface light source 3 and the second arc-shaped curved surface light source 4 are relatively arranged on both sides of the notch so that the opening of the first turntable 1 is located between the first arc-shaped curved surface light source 3 and the second arc-shaped curved surface light source 4 at the notch position. A visual device 6 is provided above the detection area at the notch position, and the control device detects and judges the appearance of the sphere to be detected based on the image obtained by the visual device 6 in the detection area. Therefore, when the opening 11 of the first turntable 1 carries the sphere to be detected 001 through the detection area at the notch, by respectively arranging arc-shaped curved surface light sources on both sides of the detection area, the first arc-shaped curved surface light source 3 and the second arc-shaped curved surface light source 4 simultaneously illuminate the upper part of the sphere to be detected in the detection area, forming two bright fields on the exposed surface of the sphere, and at the same time, the area between the two bright fields is also brightened to form a relatively dark dark field, see Figure 6 、 7 , 8. Brightfield clearly reveals surface defects such as scratches, dents, and bumps on a sphere, while darkfield focuses on detecting more subtle defects such as rough surface textures, cracks, and gaps. The combination of these two lighting modes enables comprehensive detection and coverage of nearly all types of surface defects on a sphere, enabling clearer identification of various surface defects and morphological changes, effectively improving inspection quality.

[0026] See Figure 4 According to a preferred embodiment of the present invention, the first curved surface light source 3 is disposed on the outside of the first turntable 1, and the lamp surface of the first curved surface light source 3 is an inner curved surface. The second curved surface light source 4 is disposed on the inside of the first turntable 1, and the lamp surface of the second curved surface light source 4 is an outer curved surface. Figure 5This is a schematic diagram of the three-dimensional structure of the curved surface light source of the present invention. As shown in the figure, in a preferred embodiment of the present invention, the first curved surface light source 3 and the second curved surface light source 4 are both non-barred structures, with only a single-sided frame provided on the upper side for mounting and fixing. As a result, after the first curved surface light source 3 and the second curved surface light source 4 are respectively mounted and fixed on both sides of the first turntable 1, each curved surface light source can be closer to the sphere to cover the entire exposed area of ​​the sphere, facilitating subsequent imaging of the sphere to cover the entire surface area, effectively improving detection quality.

[0027] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and many features and advantages of these embodiments are clear from this detailed description. In addition, since many modifications and changes will readily occur to those skilled in the art, the embodiments of the present invention are not intended to be limited to the exact structure and operation illustrated and described, but are intended to cover all suitable modifications and equivalents.

Claims

1. A spherical appearance detection device with a double-arc curved light source, characterized in that: The sphere appearance detection device with a dual-arc curved surface light source comprises a first turntable, a second turntable, a first arc curved surface light source, and a second arc curved surface light source. The first turntable is connected to a first motor, the first turntable is provided with openings around a circle, a support plate is provided below the first turntable, and the first motor drives the first turntable to rotate relative to the support plate; The supporting plate has a notch, the second turntable is partially located in the notch so that the opening of the first turntable is located above the second turntable at the position of the notch, and the second turntable is connected to a second motor, which drives the second turntable to rotate; The first arc-shaped curved surface light source and the second arc-shaped curved surface light source are relatively arranged on both sides of the notch so that the opening of the first turntable is located between the first arc-shaped curved surface light source and the second arc-shaped curved surface light source at the notch.

2. The spherical appearance detection device with a double-arc curved light source according to claim 1, characterized in that: The first arc-shaped curved surface light source is arranged on the outer side of the first rotating disk, and the lamp surface of the first arc-shaped curved surface light source is an inner arc surface.

3. The spherical appearance detection device with a double-arc curved light source according to claim 1, characterized in that: The second arc-shaped curved surface light source is arranged on the inner side of the first rotating disk, and the lamp surface of the second arc-shaped curved surface light source is an outer arc surface.

4. The spherical appearance detection device with a double-arc curved light source according to claim 2 or 3, characterized in that: The first arc-shaped curved surface light source and the second arc-shaped curved surface light source both have a structure without baffles.

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