CN218036461U

CN218036461U - Reflective structure for metal rough surface detection and detection device

Info

Publication number: CN218036461U
Application number: CN202221471786.1U
Authority: CN
Inventors: 许进; 张祥明; 刘圣祥; 鲁华武
Original assignee: Hefei Tuxun Electronic Technology Co ltd
Current assignee: Hefei Tuxun Electronic Technology Co ltd
Priority date: 2022-06-13
Filing date: 2022-06-13
Publication date: 2022-12-13
Anticipated expiration: 2032-06-13

Abstract

The utility model relates to a rough surface of metal detects uses reflection configuration and detection device belongs to surface defect detection area. A reflecting structure for detecting a rough metal surface comprises a reflecting plate, wherein the reflecting plate is provided with an arc-shaped inner surface, a polyester film is attached to the arc-shaped inner surface to form a reflecting cavity, and the top of the reflecting cavity is provided with an opening for imaging. The utility model discloses a polyester film relies on the reflection chamber that the reflecting plate formed, with the help of the characteristic that polyester film has certain haze and higher glossiness, can provide different angle reflection light, simultaneously keep higher luminance to the processing of the image of being convenient for; meanwhile, the light intensity of some angles can be reduced, the capability of shielding tiny defects by a light source is weakened, and the detection accuracy is improved.

Description

Reflective structure for metal rough surface detection and detection device

Technical Field

The utility model relates to a surface defect detection area, specifically speaking relates to a rough surface of metal detects uses reflective structure and detection device.

Background

With the rapid development of the intelligent manufacturing technology, the control requirements of people on industrial production are more and more strict, in order to check the processing precision, products produced by a production line are usually checked, wherein the detection of the surface defects of the products is very important, and in the detection process of the products, the arrangement of a light source is very important, so that the defects and the surface texture filtration need to be considered while enough polishing brightness can be provided for the products to be detected. In the process, researches show that tunnel polishing of a common diffuse reflection coating is uniform, but partial defects are missed to be detected because of the fact that polishing is too uniform, many improvements are generally to obtain light rays with more angles, brightness is sacrificed on the contrary, and a large number of reflected light rays with different angles illuminate partial defects, so that the accuracy of surface defect detection is reduced.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

To defect detection system in prior art for the light that obtains more angles, sacrificed luminance to and the partial defect has been illuminated to the reflection light of a large amount of different angles, thereby influence the problem of the degree of accuracy that surface defect detected, the utility model provides a rough surface detection device of metal can improve light luminance, weakens the ability of the less defect of light source shielding, thereby promotes the degree of accuracy that detects.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A reflecting structure for detecting a rough metal surface comprises a reflecting plate, wherein the reflecting plate is provided with an arc-shaped inner surface, a polyester film is attached to the arc-shaped inner surface to form a reflecting cavity, and the top of the reflecting cavity is provided with an opening for imaging.

A metal rough surface detection device comprises the reflection structure for metal rough surface detection; the bottom both sides of reflecting plate are provided with respectively and face the arch light source of arc internal surface, and the below of arch light source is equipped with the light screen, is located the middle part of two light screens of reflecting plate bottom both sides forms the export that supplies the light to penetrate.

Preferably, a supporting portion is disposed at one side of the end portion of the light shielding plate facing the reflection plate, and a fixing block for fixedly supporting the reflection plate is disposed at one end of the supporting portion, so that a preset distance is maintained between the bottom portions of the two sides of the reflection plate and the light shielding plate.

Preferably, the arc-shaped inner surface of the reflection plate is semicircular in a front view direction.

Preferably, the semicircular diameter of the semicircular arc-shaped inner surface of the reflection plate is d, the length of the light shielding plate is 0.2d-0.5d, and the height of the supporting part is 0.1d-0.2d.

Preferably, the semicircular diameter of the semicircular arc-shaped inner surface of the reflection plate is d, the length of the light shielding plate is 0.3d, and the height of the supporting part is 0.16d.

Preferably, the light source module further comprises a coaxial light source, a condenser and a light splitting sheet which are arranged on one side of the top of the reflecting plate, which is deviated from the circle center of the arc-shaped inner surface, and are arranged in sequence; the light gathering body is used for gathering the light emitted by the coaxial light source; the light splitting sheet is used for conveying the light rays passing through the light gathering body to the opening at the top of the reflecting cavity and enabling the light rays to pass through the opening.

Preferably, the arched light source comprises a copper substrate arranged on one side, close to the reflector, of the light shielding plate, and at least one patch LED lamp is arranged on the copper substrate.

Preferably, tunnel cooling fins are arranged on two sides of the reflecting plate, and a fan is arranged on one side, away from the reflecting plate, of each tunnel cooling fin.

Preferably, the splitter is provided with an auxiliary cooling fin on one side deviating from the coaxial light source and on one side deviating from the illumination direction of the coaxial light source.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) The utility model discloses a polyester film relies on the reflection chamber that the reflecting plate formed, with the help of the characteristic that polyester film has certain haze and higher glossiness, can provide different angle reflection light, simultaneously keep higher luminance to the processing of the image of being convenient for; meanwhile, the light intensity of some angles can be reduced, the capability of shielding tiny defects by a light source is weakened, and the detection accuracy is improved.

(2) The utility model discloses a supporting part lifting reflecting plate and polyester film can reduce the light-emitting window of light source to predetermined position to reduce the light of some angles, weaken the ability of the small defect of light source shielding, improve the detection accuracy.

(3) The utility model adopts the mode of combining the arched light source and the coaxial light source, the coaxial light is vertically irradiated from the top of the arc inner surface of the reflecting plate, and the surface characteristics of the object can be better projected, so as to offset the capability of the arched light source for shielding the surface characteristics; and the micro defects can be well highlighted while the rough surface of the metal is shielded by adjusting the brightness ratio of the two light sources, so that the optimal image effect is obtained.

(4) The utility model discloses one side at the beam splitter and one side of coaxial light source set up auxiliary cooling fin, disperse the heat that coaxial light source department produced, set up the tunnel fin in the reflecting plate both sides simultaneously, disperse the heat that arched light source department produced, can wholly promote device's heat dispersion.

Drawings

FIG. 1 is a front view of the detecting device of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a perspective view of the coaxial light source combined with the arched light source of the present invention;

fig. 4 is a perspective view of the reflection structure of the present invention;

fig. 5 is a front view of the reflecting plate of the present invention installed in cooperation with the arched light source.

In the figure:

1. a reflective plate; 2. a polyester film; 3. a reflective cavity;

4. an arched light source; 401. a copper substrate; 402. a surface mounted LED lamp;

5. a visor; 6. an outlet; 7. a support portion; 8. a fixed block;

9. a coaxial light source; 10. a light condenser; 11. a light splitting piece;

12. tunnel cooling fins; 13. a fan; 14. an auxiliary heat sink; 15. and (4) opening.

Detailed Description

In order to make the utility model realize that the technical means, the creation characteristics, the achievement purpose and the efficacy are easy to be understood, the utility model is further explained by combining the embodiment.

In the manufacturing process of the metal frame made of metal materials, on one hand, the friction between the tool and the surface of a part and the plastic deformation of surface layer metal during chip separation can cause the roughness of the metal surface, and the difference of the processing method and the workpiece material can cause the difference of the depth, the density, the shape and the texture of marks left on the processing surface; on the other hand, other materials such as copper or silver are also electroplated on the metal surface during the processing, and the surface of the plating layer is also rough due to the factors of the chemical process. If the product quality is to be improved, the processing process is to be improved, or the product yield is to be detected, the quality detection of the surface defects is required, wherein the surface quality mainly indicates whether the surface is oxidized, blackened, contaminated, scratched, or the like.

In view of the above-mentioned problems of surface defect detection, the use of a machine vision inspection system is the most effective and fast detection method. The machine vision system converts the shot target into an image signal through a machine vision product, transmits the image signal to a special image processing system to obtain the form information of the shot target, and converts the form information into a digital signal according to the information of pixel distribution, brightness, color and the like; the image system then analyzes and processes these signals. In the process, the light source of the detection system is the most important part of the system in terms of the accuracy of image signals, and the arched light source in the light source is more applied by virtue of the excellent defect illumination capability.

The main working principle of the tunnel detection light source is as follows: after the LED emits light which is reflected by the reflecting structure, the light can be irradiated from various angles to obtain diffused light, the rough surface of the metal can be illuminated when the diffused light irradiates the surface of the measured object, the rough surface of the metal is effectively shielded, an even image effect is obtained, and therefore final image processing is carried out. In the process, if the light angle is too large, the brightness is likely to be low, and the processing of the image is not facilitated, and meanwhile, a large amount of diffused light with different angles can illuminate some small defects while shielding the rough surface of the metal, so that the surface defects are shielded all the time, and the accuracy of detecting the surface defects is reduced. In this regard, a reflective structure and a detection device are needed, which not only maintain good light brightness, but also weaken the ability of a light source to shield small defects, thereby finally improving the detection accuracy.

Example 1

As shown in fig. 2 and 4, a reflective structure for metal rough surface detection, which is a structure for reflecting light in a light source system, mainly comprises a reflective plate 1 for supporting and a polyester film 2 for reflecting light.

Specifically, the reflection plate 1 has an arc-shaped inner surface. The arc inner surface can be an elliptical arc or a circular arc, and is preferably a semicircular arc; the inner surface of the arc is attached with a polyester film 2, thereby forming a reflecting cavity 3; in the mechanism, by virtue of the characteristics of certain haze and higher glossiness of the polyester film 2, reflected light rays at different angles can be provided, and meanwhile, higher brightness is kept, so that the processing of images is facilitated; meanwhile, the light intensity of some angles can be reduced, the light source shielding tiny defects are weakened, and the detection accuracy is improved.

In addition, an opening 15 is formed at the top of the reflecting cavity 3, namely at the top of the arc-shaped surfaces of the reflecting plate 1 and the polyester film 2, so that imaging equipment can perform imaging, specifically, a camera can perform shooting.

Example 2

As shown in fig. 1 and 3, a rough metal surface detection device adopts the rough metal surface detection reflection structure of embodiment 1 as a light reflection part, and additionally, two sides of the bottom of the reflection plate 1 are respectively provided with an arched light source 4, and the light irradiation direction of the arched light source 4 faces to the arc-shaped inner surface of the reflection plate 1 to provide a light source for light reflection.

In order to avoid unnecessary light rays from being reflected on the product to be detected, light shielding plates 5 are arranged below the arched light sources 4 at the bottoms of the two sides of the reflecting plate 1, and an outlet 6 for emitting light rays can be formed in the middle of the two light shielding plates 5. Specifically, the arched light source 4 is composed of a copper substrate 401 and a chip LED lamp 402 disposed on the copper substrate 401, and the copper substrate 401 is fixedly disposed on a side of the light shielding plate 5 facing the reflector 1, and has good heat dissipation characteristics. Because light irradiation can bring certain heat, in order to avoid causing the harm for structures such as polyester film 2, set up tunnel fin 12 in reflecting plate 1 both sides, for arch light source 4 heat dissipation, tunnel fin 12 deviates from reflecting plate 1 one side still is provided with fan 13, further strengthens the heat dissipation to arch light source 4.

As shown in fig. 5, in order to provide a proper amount of reflected light rays with different angles by matching with the mylar 2, a supporting portion 7 is disposed at one side of the end portion of the light shielding plate 5 facing the reflection plate 1, and the supporting portion 7 fixedly supports the reflection plate 1 through a fixing block 8, so that a preset distance is maintained between the bottom portions of the two sides of the reflection plate 1 and the light shielding plate 5.

When the arc-shaped inner surface of the reflection plate 1 is a semicircular arc, the arc-shaped inner surface of the reflection plate 1 is semicircular in the front view direction. At this time, the sizes of the structures of the reflecting plate 1, the light shielding plate 5 and the like are limited, and researches show that when the light intensity of different angles is kept at a proper value, the semicircular diameter of the semicircular arc-shaped inner surface of the reflecting plate 1 is d, the length of the light shielding plate 5 is 0.2d-0.5d, and the height of the supporting part 7 is 0.1d-0.2d.

In another possible embodiment, when the light intensity of different angles is maintained at an optimum value, the semicircular diameter of the semicircular arc-shaped inner surface of the reflection plate 1 is d, the length of the light shielding plate 5 is 0.3d, and the height of the support 7 is 0.16d.

In addition, researches show that the tunnel surface defect condition can be better highlighted by adopting a mode of combining the arched light source 4 and the coaxial light source 9. Specifically, coaxial light vertically irradiates on a product to be measured, the surface characteristics of the protrusion body which can be better are offset with the capability of the arched light source 4 for shielding the surface characteristics, the brightness ratio of the two light sources can be adjusted, small defects are well highlighted while the rough surface of the metal is shielded, and therefore the best image effect is obtained.

Specifically, arrange in proper order and set up coaxial light source 9, the spotlight body 10 and the beam splitter 11 that are used for gathering coaxial light source 9 emission light in the one side that deviates from the arc internal surface centre of a circle in reflecting plate 1 top, beam splitter 11 is used for carrying the light that passes spotlight body 10 to the opening 15 at reflecting cavity 3 top passes through in following opening 15. The coaxial light source 9 is also composed of a copper substrate and a patch LED lamp.

Similarly, in order to enhance heat dissipation, auxiliary heat dissipation fins 14 are provided on the side of the spectroscopic plate 11 away from the coaxial light source 9 and on the side of the coaxial light source 9 away from the illumination direction.

Further, providing a socket fixing structure at one side or both sides of the reflection plate 1, and a socket fixed by the socket fixing structure, preferably an aviation socket, provide excellent electrical properties.

In the description of this patent, it is to be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "front," "back," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of this patent.

In this patent, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, but rather that the principles of the invention are described in the above embodiments and the description, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and these changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A reflective structure for detecting a rough metal surface is characterized in that: the reflective plate comprises a reflective plate (1), wherein the reflective plate (1) is provided with an arc-shaped inner surface, a polyester film (2) is attached to the arc-shaped inner surface to form a reflective cavity (3), and an opening (15) for imaging is formed in the top of the reflective cavity (3).

2. A metal rough surface detection device is characterized in that: comprising the metal rough surface detecting reflective structure according to claim 1; the light source reflecting plate is characterized in that two sides of the bottom of the reflecting plate (1) are respectively provided with an arched light source (4) facing the arc-shaped inner surface, a light shielding plate (5) is arranged below the arched light source (4), and an outlet (6) for emitting light is formed in the middle of the two light shielding plates (5) positioned on two sides of the bottom of the reflecting plate (1).

3. The metal roughness surface detection device of claim 2, wherein: one side of the end part of the light screen (5) facing the reflecting plate (1) is provided with a supporting part (7), and one end of the supporting part (7) is provided with a fixing block (8) for fixedly supporting the reflecting plate (1), so that a preset distance is kept between the bottoms of the two sides of the reflecting plate (1) and the light screen (5).

4. The metal roughness surface detection device of claim 3, wherein: the arc-shaped inner surface of the reflecting plate (1) is semicircular in the front view direction.

5. The metal roughness surface detection device of claim 4, characterized in that: the semi-circular diameter of the semi-circular arc-shaped inner surface of the reflecting plate (1) is d, the length of the light shielding plate (5) is 0.2d-0.5d, and the height of the supporting part (7) is 0.1d-0.2d.

6. The metal roughness surface detection device of claim 4, characterized in that: the semi-circular diameter of the semi-circular arc-shaped inner surface of the reflecting plate (1) is d, the length of the light shielding plate (5) is 0.3d, and the height of the supporting part (7) is 0.16d.

7. The metal roughness surface detection device of claim 2, wherein: the light source device also comprises a coaxial light source (9), a light gathering body (10) and a light splitting sheet (11), which are arranged on one side of the top of the reflecting plate (1) deviating from the circle center of the arc-shaped inner surface and are arranged in sequence; the light gathering body (10) is used for gathering the light emitted by the coaxial light source (9); the light splitting sheet (11) is used for conveying the light rays passing through the light gathering body (10) to an opening (15) at the top of the reflecting cavity (3) and passing through the opening (15).

8. The metal roughness surface detection device of claim 2, wherein: the arched light source (4) comprises a copper substrate (401) arranged on one side, close to the reflecting plate (1), of the light shading plate (5), and at least one patch LED lamp (402) is arranged on the copper substrate (401).

9. The metal roughness surface detection device of claim 2, wherein: the tunnel heat dissipation plate is characterized in that tunnel heat dissipation plates (12) are arranged on two sides of the reflecting plate (1), and a fan (13) is arranged on one side, deviating from the reflecting plate (1), of each tunnel heat dissipation plate (12).

10. The metal rough surface detection device according to claim 7, wherein: and auxiliary cooling fins (14) are arranged on one side of the light splitting sheet (11) departing from the coaxial light source (9) and one side of the coaxial light source (9) departing from the illumination direction.