Novel dome light source

Abstract

The utility model discloses a novel dome light source which comprises a light source body, the light source body comprises a shell, an LED lamp bead, a white coating and a black coating, the LED lamp bead is arranged in an LED lamp bead base at the bottom of the light source body, and the white coating and the black coating are coated on the inner wall of the shell in a staggered mode. Light emitted by the LED lamp beads is irradiated to the inner wall of the shell, the reflectivity of the white coating is high, strong reflected light rays are achieved, the reflectivity of the black coating is low, and almost no reflected light rays exist. The white areas on the surface of the product correspond to reflected light rays of the white coatings, due to the fact that the black coatings on the two sides basically have no reflection, the angle range of the light rays received by the surface of the product becomes small, and the black areas on the surface of the product receive the weak reflected light rays of the white coatings on the two sides. According to the novel dome light source, light received by the surface of a whole product becomes non-uniform while one-time imaging of the hemispherical surface is guaranteed, the imaging condition of tiny scratches is better met, and imaging of the tiny scratches is highlighted.

Description

Technical Field

[0001] The utility model relates to the technical field of machine vision, and particularly relates to a novel dome light source. Background Art

[0002] For the traditional dome light source, the light emitted by a circle of LED lamp beads at the bottom is reflected by the inner wall of the hemispherical white coating and then irradiates on the object to be measured, which is suitable for the detection of curved surfaces and spherical surfaces. The existing dome light has a poor imaging effect for scratches, especially for slight scratches, there is basically no imaging effect, and its imaging effect is as Figure 1 shown. In view of this situation, a bar light source at a specific angle is usually used to solve the problem. Due to the high irregularity of the spherical surface and the very small imaging spot of the bar light source, multiple images need to be taken for imaging. The defect imaging is incomplete and the algorithm is difficult. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a novel dome light source to solve the problems proposed in the above background art.

[0004] A novel dome light source includes a light source body, the light source body includes a housing, and also includes LED lamp beads, a white coating and a black coating. The LED lamp beads are arranged in an LED lamp bead base at the bottom of the light source body, and the inner wall of the housing is alternately coated with the white coating and the black coating.

[0005] Further, the black coating and the white coating are equally spaced on the inner wall of the housing, and the black coating and the white coating have the same shape and size.

[0006] Further, the included angle between two adjacent black coatings is 5° - 10°.

[0007] Further, the LED lamp beads are evenly distributed at equal intervals in a circle at the bottom of the light source.

[0008] Advantages of the Utility Model

[0009] The utility model significantly improves the imaging effect of scratches, reduces the need for multiple image taking for imaging, enhances the detection accuracy, adapts to various detection requirements, and has a simple structure, is easy to manufacture and maintain, which is specifically reflected in the following aspects:

[0010] 1. Improve the imaging effect of scratches: The white and black coatings on the inner wall of the housing significantly reduce the reflectivity of these areas, forming a strong contrast between light and dark. When light shines on the surface of the object to be measured, the light reflection at the scratched area is different from that of the surrounding area. The black coating can better highlight these differences, making it easier to detect subtle defects such as minor scratches. The LED lamp beads are evenly distributed at equal intervals in a circle at the bottom of the light source, ensuring uniform light distribution, reducing the generation of shadows, and improving the overall uniformity and clarity of the imaging.

[0011] 2. Reduce the need for multiple imaging: Due to the design of the black coating, the new dome light source can capture more details, especially minor scratches, in a single imaging. This reduces the need for multiple imaging, improving the detection efficiency. Traditional strip light sources require multiple imaging, resulting in increased complexity of subsequent image processing algorithms. The new dome light source can obtain a complete and clear image through a single imaging, simplifying the image processing algorithm and reducing the demand for computing resources.

[0012] 3. Enhance the detection accuracy: The contrast between light and dark formed by the black and white coatings enhances the contrast of the image, making subtle defects more obvious and improving the detection accuracy. The uniform light distribution and enhanced contrast improve the reliability of the detection results.

[0013] 4. Adapt to various detection requirements: The new dome light source is still applicable to the detection of curved and spherical surfaces, maintaining the advantages of traditional dome light sources. The brightness of the LED lamp beads can be adjusted through an external controller to adapt to the needs of different detection environments and objects to be measured, improving the flexibility and application range of the light source.

[0014] 5. Simple structure and easy to manufacture: The lamp bead base, LED lamp beads, housing, white and black coatings on the inner wall of the housing, the overall combined design is simple, and each component can be independently manufactured and assembled, reducing the production cost. The equal interval distribution of the LED lamp beads and the equal interval distribution of the black coating make it more convenient to maintain and replace components, extending the service life of the light source. Description of the Drawings

[0015] Figure 1 The imaging effect diagram of the dome light source of the prior art;

[0016] Figure 2 The schematic cross-sectional structure diagram of the present utility model;

[0017] Figure 3 The schematic cross-sectional structure diagram of the present utility model;

[0018] Figure 4 The schematic rendering diagram of the present utility model;

[0019] Figure 5 Schematic diagram of the rendering effect of the present utility model;

[0020] Figure 6 Imaging effect diagram in the embodiment of the present utility model. Specific implementation manner

[0021] At the bottom of the dome light source of the present utility model, there is a circle of LED lamp beads. The light emitted by the lamp beads irradiates the inner wall of the outer shell, and the reflected light is distributed on the measured object with alternating light and dark, realizing the detection of micro scratches, and is mainly applied to the detection of curved surfaces and spherical surfaces;

[0022] The existing dome light has a poor imaging effect for scratches, especially for slight scratches, there is basically no imaging effect. In view of this situation, a bar-shaped light source at a specific angle is usually used to solve the problem. Due to the spherical surface being relatively irregular and the imaging spot of the bar-shaped light source being very small, multiple images need to be taken for imaging, the defect imaging is incomplete, and the algorithm is difficult.

[0023] The present utility model changes the light and dark distribution inside the dome light. The white area has strong reflection, and the black area has almost no reflected light, changing the light angle received by the product surface, thereby highlighting the characteristics of slight scratches, and at the same time reducing the number of image acquisitions. Specifically, please refer to Figures 2 - 5 , a new type of dome light source, including a hemispherical lamp shade. The hemispherical lamp shade constitutes the main structure of the dome light source, and the inside is a cavity for accommodating other components; the hemispherical lamp shade includes an outer shell 2, and also includes LED lamp beads 1, a white coating 3 and a black coating 4. The LED lamp beads 1 are arranged in the LED lamp bead base 5 at the bottom of the light source. The white coating 3 and the black coating 4 cover the inner wall of the outer shell 2 inside the light source. The black coating 4 and the white coating 3 are distributed at equal intervals. The shape and size of the exposed white coating 3 between two adjacent black coatings 4 are the same as those of the black coating 4. The included angle between two adjacent black coatings is 5° - 10°. The LED light emission of the present utility model irradiates the inner wall of the outer shell 2. The white area on the product surface corresponds to the reflected light of the white coating. Since there is basically no reflection on both sides of the black coating, the range of the light angle received by the product surface will become smaller, and the black area on the product surface receives weak reflected light from the white coatings on both sides. While ensuring one-time imaging of the hemispherical surface, this new type of dome light source makes the light received by the entire product surface uneven, more in line with the imaging conditions of micro scratches, and highlights the imaging of micro scratches.

[0024] Specifically, the LED lamp beads 1 are evenly distributed at the bottom of the hemispherical lamp shade to form a circle, ensuring that the light can be evenly irradiated to the inner wall of the outer shell 2. A circle of LED lamp beads 1 arranged at the bottom of the light source is used to emit light and irradiate the inner wall of the outer shell 2.

[0025] In a preferred embodiment, the specific distribution of the LED lamp beads 1 can be any of the following distribution methods:

[0026] Equidistant distribution: The LED lamp beads 1 are evenly distributed in a circle at the bottom of the light source at equal intervals to ensure uniform light distribution. The center distance between each lamp bead 1 is X millimeters (the specific value can be determined according to the actual product specifications) to reduce the shadow caused by improper distance between the lamp beads.

[0027] Annular array: The LED lamp beads 1 form an annular array and are evenly distributed around the center point at the bottom of the light source. The design of the annular array enables light to irradiate the inner wall of the white coating 3 evenly from multiple directions, thus ensuring the uniformity of the light on the surface of the object to be measured.

[0028] Multi-layer annular distribution: To further improve the uniformity and intensity of the light, a multi-layer annular array can be set at the bottom of the light source. The LED lamp beads 1 in each layer of the annular array are also distributed at equal intervals, and the distance between different layers and the number of lamp beads can be adjusted according to actual needs. For example, fewer lamp beads can be set in the inner layer and more lamp beads in the outer layer to form a gradual light effect.

[0029] Inclination at a specific angle: Each LED lamp bead 1 can be designed to be inclined at a specific angle to ensure that the light can irradiate different areas of the white coating 3 more effectively. This inclination angle can be optimized according to the surface characteristics of the object to be measured and the detection requirements. For example, the inclination angle can be set to 15° - 30° to improve the coverage range and uniformity of the light.

[0030] Zone control: The LED lamp beads 1 can be divided into multiple zones for independent control. The lamp beads 1 in each zone can be individually adjusted in brightness through an external controller to meet the needs of different detection tasks. For example, the annular array can be divided into 4 or 8 zones, and the brightness of the lamp beads 1 in each zone can be independently adjusted, thus achieving more flexible light control.

[0031] In an optimized specific embodiment, the LED lamp beads 1 are evenly distributed in the middle of the base at equal intervals, and the number of lamp beads is 30, and there are 20 black and white coatings in total.

[0032] In another optimized specific embodiment, the LED lamp beads 1 are evenly distributed in a circle at the bottom of the light source at equal intervals, and the center distance between each lamp bead 1 is 5 mm. These lamp beads 1 form an annular array and are evenly distributed around the center point at the bottom of the light source. To further improve the uniformity and intensity of the illumination, two layers of annular arrays can also be arranged at the bottom of the light source. The inner layer contains 16 lamp beads 1, and the outer layer contains 24 lamp beads 1. The center distance between the lamp beads 1 in each layer is 5 mm. In addition, each lamp bead 1 can be designed to be installed at an inclination angle of 20°, so as to ensure that the light can irradiate different areas of the white coating 3 more effectively. Through an external controller, the brightness of the lamp beads 1 in each area can be independently adjusted to achieve more flexible illumination control.

[0033] The white coating 3 and the black coating 4 cover the inner wall of the hemispherical housing, forming a complete hemispherical black-and-white alternating reflecting surface. The white coating on the inner wall is used to reflect the light of the LED lamp beads. The black and white coatings are evenly distributed on the inner wall and have the same shape and size. The reflectivity of the black coating 4 is significantly reduced, forming a strong contrast between light and dark distribution.

[0034] During specific implementation, the number and spacing distance of the black coatings 4 can be adjusted according to actual needs to achieve the best imaging effect. For example, the number of the black coatings 4 can be increased or decreased, or the distance between them can be adjusted to meet the requirements of different detection scenarios. In addition, according to the characteristics of the product surface, the shape and size of the black coating 4 can be optimized to make it more suitable for a specific type of scratch detection.

[0035] In a specific embodiment, the detection of slight scratches on the hemispherical metal surface is carried out. Figure 1 The figure shows the imaging effect diagram formed after irradiating the hemispherical metal surface with an ordinary dome light source. It can be seen that the imaging effect for scratches is poor, especially for slight scratches, there is basically no imaging effect. When using the novel dome light source of the present application to detect the hemispherical metal surface, in this embodiment, the number of black coatings of the novel dome light source used is 10 and they are evenly distributed. Under the irradiation of the novel dome light source, a dense light and dark distribution is formed on the hemispherical metal surface, and the detection effect is as Figure 6 shown. It can be seen that it can effectively highlight fine scratches and defects and improve the detection accuracy.

[0036] The utility model significantly improves the imaging effect of scratches, reduces the need for multiple image acquisitions, enhances the detection accuracy, adapts to various detection requirements, and has a simple structure, is easy to manufacture and maintain, specifically reflected in the following aspects:

[0037] 1. Improve the imaging effect of scratches: The white and black coatings on the inner wall of the housing significantly reduce the reflectivity of these areas, forming a strong contrast between light and dark. When light shines on the surface of the object to be measured, the light reflection at the scratch is different from that in the surrounding area. The black coating can better highlight these differences, making it easier to detect subtle defects such as minor scratches. The LED lamp beads are evenly distributed at equal intervals in a circle at the bottom of the light source, ensuring uniform light distribution, reducing the generation of shadows, and improving the overall uniformity and clarity of the imaging.

[0038] 2. Reduce the need for multiple imaging: Due to the design of the black coating, the new dome light source can capture more details, especially minor scratches, in a single imaging. This reduces the need for multiple imaging, improving the detection efficiency. Traditional strip light sources require multiple imaging, resulting in increased complexity of subsequent image processing algorithms. The new dome light source can obtain a complete and clear image through single imaging, simplifying the image processing algorithm and reducing the demand for computing resources.

[0039] 3. Enhance the detection accuracy: The contrast between light and dark formed by the black and white coatings enhances the contrast of the image, making subtle defects more obvious and improving the detection accuracy. The uniform light distribution and enhanced contrast reduce misjudgments caused by uneven illumination, improving the reliability of the detection results.

[0040] 4. Adapt to various detection requirements: The new dome light source is still suitable for the detection of curved and spherical surfaces, maintaining the advantages of traditional dome light sources. The brightness of the LED lamp beads can be adjusted through an external controller to adapt to the needs of different detection environments and objects to be measured, improving the flexibility and application range of the light source.

[0041] 5. Simple structure and easy to manufacture: The lamp bead base, LED lamp beads, housing, white and black coatings on the inner wall of the housing, the overall combined design is simple, and each component can be independently manufactured and assembled, reducing the production cost. The equal interval distribution of the LED lamp beads and the equal interval distribution of the black coating make it more convenient to maintain and replace components, extending the service life of the light source.

Claims

1. A new type of dome light source, comprising a light source body, the light source body including a housing (2), characterized in that, It also includes an LED lamp bead (1), a white coating (3) and a black coating (4). The LED lamp bead (1) is arranged in an LED lamp bead base (5) at the bottom of the light source body, and the inner wall of the housing (2) is alternately coated with the white coating (3) and the black coating (4).

2. A novel dome light source according to claim 1, characterized in that, The black coating (4) and the white coating (3) are equally spaced on the inner wall of the housing (2), and the black coating (4) and the white coating (3) have the same shape and size.

3. A novel dome light source according to claim 1, wherein The included angle between two adjacent black coatings (4) is 5°-10°.

4. A novel dome light source according to claim 1, characterized in that, The LED lamp beads (1) are evenly distributed at equal intervals in a circle at the bottom of the light source.

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