CN204629260U - A kind of light source for crown cap defect intelligent detection equipment - Google Patents

Abstract

A light source for intelligent detection equipment for metal cover defects, used in conjunction with an image acquisition device, including a coaxial light source coaxially arranged from top to bottom, a dome shadowless light source and a 0-degree ring light source; the coaxial light source It includes an illumination source one and a semi-transparent mirror; the dome shadowless light source includes a spherical reflection part and an illumination source two arranged on the edge of the spherical reflection part, and a white diffuse reflection material is arranged inside the spherical reflection part; The 0-degree annular light source is provided with an illumination source 3 and a diffuse reflection plate behind the illumination source 3 on the inner side. The light source used in the intelligent detection equipment for metal cover defects of the utility model can highlight all existing defects such as scratches, black spots, broken glue, bubble position deviation, and edge deformation on the entire metal cover surface, thereby ensuring image quality. The acquisition device can capture clear images for the computer system to process data.

Description

A light source for intelligent detection equipment for metal cover defects

technical field

The utility model relates to the field of detection lighting, in particular to a light source used for intelligent detection equipment for metal cover defects.

Background technique

In many beverage and food packaging, it is often necessary to set a metal cover on the top or bottom of the packaging can to form a closed space with the packaging can to isolate the air and prolong the shelf life of the beverage or food. In industrial production, the metal cover may be deformed, cracked, or the film is scratched or damaged due to stamping, rounding and other forming processes, which will affect the quality and safety of the corresponding product. The traditional inspection method is to rely on manual inspection of the appearance of the metal cover. On the rapid production line, relying on manual inspection, the labor cost is high, and the work is tedious, it is easy to have false detection, missed detection, etc., which does not meet the requirements of efficient and high-quality production inspection. Therefore, there is a need for a device capable of intelligently inspecting the metal caps on the production line.

When using equipment for intelligent inspection of metal covers, the selection and design of the light source of the image acquisition device is very important. When a common light source irradiates the metal cover, more reflected light will enter the lens of the image acquisition device, causing interference and affecting the result of processing and judgment. In addition, ordinary light sources can only illuminate the upper surface of the metal cover, but cannot illuminate the side of the metal cover. At the same time, when ordinary light sources reflect defects such as scratches, black spots, broken glue, bubble position deviation and foreign objects on the metal cover, as well as defects such as deformation and cracks on the edge of the metal cover, there are more or less insufficient or blind spots. As a result, the image acquisition is inaccurate, resulting in missed detection or misjudgment by intelligent detection, and affecting the detection effect.

Contents of the invention

Aiming at the deficiencies in the prior art, the utility model provides a light source used for intelligent detection equipment for metal cover defects.

In order to solve the above technical problems, the utility model is solved through the following technical solutions:

A light source for intelligent detection equipment for metal cover defects, used in conjunction with an image acquisition device, including a coaxial light source coaxially arranged from top to bottom, a dome shadowless light source and a 0-degree ring light source; the coaxial light source It includes an illumination source one and a semi-transparent mirror; the dome shadowless light source includes a spherical reflection part and an illumination source two arranged on the edge of the spherical reflection part, and the top of the spherical reflection part is provided with an opening, and the opening The diameter matches the size of the semi-transparent mirror of the coaxial light source, and the inside of the spherical reflection part is provided with a white diffuse reflection material; Three rear diffusers;

The coaxial light source, the position between the dome shadowless light source and the 0-degree ring light source are set according to the following requirements: the light emitted by the illumination source enters after being reflected by the semi-transparent mirror and the upper surface of the metal cover to be inspected. The lens of the image acquisition device, the light emitted by the second illumination source enters the lens of the image acquisition device after being reflected by the spherical reflection part and the metal cover to be inspected sequentially, and the light emitted by the third illumination source passes through the The side reflection of the metal cover to be inspected enters the lens of the image acquisition device.

Preferably, the second illumination source is an LED light source.

Preferably, the light emitted by the LED light source is blue light.

Preferably, the third illumination source is an LED light source that emits white light.

Furthermore, the light source used in the intelligent detection equipment for metal cover defects of the present invention also includes a light source controller, which is used to adjust the on/off of the coaxial light source, the dome shadowless light source and the 0-degree ring light source. off and brightness.

According to the light source used in the intelligent detection equipment for metal cover defects of the utility model, the light source system includes a coaxial light source, a dome shadowless light source and a 0-degree ring-shaped light source which are superimposed sequentially from top to bottom. When the coaxial light source is working, the light emitted by the lighting source is reflected by the semi-transparent mirror and then shines on the surface of the metal cover parallel to the direction of the lens, and then returns to the lens parallel to the direction of the lens, which can not only reduce the specular reflection, but also compensate for the dome Insufficient brightness of the shadowless light source to the center of the metal cover. A row of LED lamps emitting blue light wavelengths is installed on the inner side of the edge of the spherical reflection part of the dome shadowless light source. Because metal covers of different materials have different degrees of light reflection under the same light source, using a dome light source that emits uniform blue light can reduce interference from the material of the metal cover. The light irradiates the inside of the circular spherical reflector in the form of scattering, and becomes uniform diffuse light after being reflected by the internal white diffuse reflection material. The light is basically parallel to the direction of the lens and irradiates the surface of the metal cover. The smooth surface of the metal cover will Make the light return along the direction of the camera lens, and the uneven surface such as the skeleton, contour and defect on the surface of the metal cover will scatter the light to other directions outside the lens, so that the lens of the image acquisition device captures the uniform illumination clear image of the metal cover. The 0-degree ring light source includes two rows of LED lamp beads and a diffuser plate. When it is working, the light emitted by the LED becomes uniform light after passing through the diffuser plate, and it flows from the surrounding of the metal cover at an approximately horizontal angle. The central illumination of the cover surface compensates the light flux at the side edge of the cover, thus clearly reflecting the characteristic information on the circumference of the metal cover.

In the light source used for intelligent detection equipment for metal cover defects of the utility model, the coaxial light source and the dome shadowless light source irradiate the entire front surface of the metal cover, including the central surface, the edge surface, and the glue injection surface of the metal cover. And the curling part; the 0-degree ring light source is mainly irradiated on the side edge of the metal cover, and is mainly used to illuminate the curling part of the metal cover to highlight the defects existing on the curling edge. The dome shadowless light source can clearly display the front surface image of the metal cover with different materials, textures and skeletons in the image. At the same time, in order to make up for the circular dark field in the metal cover image caused by the use of the dome light source, Use a coaxial light source superimposed above the dome light source to fill in the light, thereby eliminating the influence of the dark field. Under uniform blue light irradiation, it can highlight the uneven part of the metal cover surface and the skeleton pattern in the center of the metal cover, so as to detect defects such as scratches, black spots, broken glue, bubble position deviation and foreign objects on the surface of the object. . The 0-degree ring light source irradiates the side edge of the metal cover to highlight the curling area of the metal cover to detect defects such as edge deformation and cracks on the edge. The light source system composed of three light sources can highlight all existing defects such as scratches, black spots, glue breakage, bubble position offset, and edge deformation on the entire metal cover surface, thus ensuring that the image acquisition device can capture clear images. The image of the computer system is used for data processing, which improves the accuracy and efficiency of intelligent detection, and has broad industrial application prospects.

Description of drawings

Fig. 1 is the structural representation of a preferred embodiment of the present utility model;

Explanation of reference signs: 1-metal cover; 2-0-degree ring light source, 21-illumination source three, 22-diffusion plate; 3-dome shadowless light source, 31-spherical reflection part, 32-illumination source two, 33 - opening; 4 - coaxial light source, 41 - illumination source one, 42 - semi-transparent mirror; 5 - lens.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.

Referring to accompanying drawing 1, the utility model provides a kind of light source that is used for the intelligent detection equipment of metal cap defect, is used in conjunction with an image acquisition device, comprises the coaxial light source 4 that coaxially arranges from top to bottom, dome shadowless light source 3 and 0 degree ring light source 2. Wherein, the coaxial light source 4 is provided with an illumination source one 41 and a semi-transparent mirror 42 . Dome shadowless light source 3 is provided with spherical reflector 31, and the inside of this spherical reflector 31 is coated with white diffuse reflection material; Mirror 42 is matched in size. An illumination source 2 32 is provided on the inner edge of the spherical reflector 31 . An illumination source 3 21 is provided inside the 0-degree annular light source 2 , and a diffusion plate 22 is provided behind the illumination source 3 21 .

Specifically, the coaxial light source 3, the position between the dome shadowless light source 3 and the 0-degree ring light source 4 are set according to the following requirements: the light emitted by the illumination source 1 42 in the coaxial light source 4 passes through the half mirror 42 and the light to be inspected. The upper surface of the metal cover 1 is reflected and enters the lens 5 of the image acquisition device, which not only reduces the specular reflection, but also compensates for the lack of light flux at the center of the metal cover surface by the dome shadowless light source 3 . The light emitted by the second illumination source 32 in the dome shadowless light source 3 enters the lens 5 after being reflected by the spherical reflector 31 and the metal cover 1 to be inspected in sequence. Preferably, in this embodiment, the second illumination source 32 is an LED light source, especially, the light emitted by the LED light source is blue light. Because metal covers of different materials have different degrees of light reflection when illuminated by the same light source, the use of a dome light source that emits uniform blue light can reduce the interference of the metal cover material. The light emitted by the illumination source 2 32 irradiates the interior of the circular spherical reflection part 31 in the form of scattering, and becomes uniform diffused light after being reflected by the white diffuse reflection material inside, and the light irradiates the metal cover in a direction substantially parallel to the lens 5 The smooth surface of the metal cover will make the light return along the direction of the camera lens, while the uneven surface such as skeleton, contour and defect on the surface of the metal cover will scatter the light to other directions outside the lens, so that the image acquisition The unit's lens captures a sharp, evenly lit image of the metal cover. The coaxial light source and the dome shadowless light source irradiate the entire front surface of the metal cover, including the center surface, bezel surface, glue injection surface and curling part of the metal cover, to detect scratches, black spots, and broken parts on the surface of the metal cover. Defects such as glue, bubble position offset and foreign matter.

The 0-degree ring light source 2 includes an illumination source three 21 and a diffuser plate 22. Preferably, the illumination source three is two rows of LED lamp beads. When it works, the light emitted by the LED becomes uniform light after passing through the diffuser plate 22, and irradiates from the periphery of the metal cover to the center of the cover at an approximately horizontal angle to compensate for the luminous flux at the side edge of the cover, thereby clearly reflecting the metal surface. Feature information on the cover circumference. It is used to detect defects such as edge deformation and cracks on the edge.

The light source used in the intelligent detection equipment for metal cover defects of the utility model also includes a light source controller (not shown in the figure), the light source controller is used to adjust the coaxial light source 4, the dome shadowless light source 3 and the 0-degree ring light source 2 On/off and brightness, so that the image acquisition of the metal cover can be carried out in the best light.

The light source used in the intelligent detection equipment for metal cover defects of the utility model adopts a light source system composed of three light sources, which can remove all scratches, black spots, broken glue, and bubble position deviations that exist on the entire metal cover surface. , Edge deformation and other defects are highlighted, thus ensuring that the image acquisition device can capture clear images for data processing by the computer system, improving the accuracy and efficiency of intelligent detection, and has broad industrial application prospects.

In a word, the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall include Within the protection scope of the present utility model.

Claims (5)

1. for a light source for crown cap defect intelligent detection equipment, with an image collecting device with the use of, it is characterized in that:

Comprise the coaxial coaxial light source (4) arranged from top to bottom, dome is without shadow light source (3) and 0 degree of annular light source (2); Described coaxial light source (4) comprises light source one (41), and semi-transparent reflection mirror (42); Described dome comprises spheric reflection portion (31) without shadow light source (3) and is located at the light source two (32) at edge, described spheric reflection portion, the top in described spheric reflection portion is provided with opening (33), semi-transparent reflection mirror (42) size of described opening diameter and described coaxial light source matches, and the inside of described spheric reflection portion (31) is provided with white diffuse reflective material; The diffuse reflector (22) of described 0 degree of annular light source (2) after inner side is provided with light source three (21) and is located at described light source three;

Described coaxial light source (4), dome is arranged by requirement as follows without the position between shadow light source (3) and 0 degree of annular light source (2): the light that described light source one (41) sends enters the camera lens (5) of described image collecting device after the upper surface reflection of semi-transparent reflection mirror (42) and crown cap to be checked (1), the light that described light source two (32) sends is successively through described spheric reflection portion (31), the camera lens (5) of described image collecting device is entered after crown cap to be checked (1) reflection, the light that described light source three (21) sends enters the camera lens (5) of described image collecting device after the offside reflection of described crown cap to be checked (1).

2., as claimed in claim 1 for the light source of crown cap defect intelligent detection equipment, it is characterized in that: described light source two (32) is LED light source.

3., as claimed in claim 2 for the light source of crown cap defect intelligent detection equipment, it is characterized in that: the light that described light source two (32) sends is blue light.

4., as claimed in claim 1 for the light source of crown cap defect intelligent detection equipment, it is characterized in that: the LED light source that described light source three (21) is the coloured light that turns white.

5. the light source for crown cap defect intelligent detection equipment as described in any one of claim 1-4, it is characterized in that: also comprise light source controller, described light source controller is for regulating described coaxial light source, dome without the ON/OFF of shadow light source and 0 degree of annular light source and brightness.