CN211669047U

CN211669047U - Visual light source and machine vision system

Info

Publication number: CN211669047U
Application number: CN201921608958.3U
Authority: CN
Inventors: 黄伟福; 林�章
Original assignee: Shenzhen Hegho Electric Co ltd
Current assignee: Shenzhen Hegho Electric Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-10-13
Anticipated expiration: 2029-09-25

Abstract

The embodiment of the utility model discloses visual light source and machine vision system, visual light source includes light emitting component, first housing and second housing, light emitting component is located to first housing cover, light emitting component is towards the inner wall of first housing, light emitting component is used for sending out light, first housing is connected to the second housing, the second housing is provided with detects the chamber, opening and a plurality of through-hole, opening and through-hole all with detect the chamber intercommunication, the opening extends to the opposite side of second housing by one side of second housing, it is used for holding and detects the piece to detect the chamber, the opening is used for allowing to detect the piece business turn over and detects the chamber, the through-hole is used for installing and gets for instance equipment. The inner wall of the first cover shell can reflect light rays to the inner wall of the second cover shell, and the light rays can be subjected to multiple diffuse reflection between the inner walls of the first cover shell and the second cover shell. Through the arrangement, the effective illumination area can be enlarged, so that the piece to be detected can be illuminated and detected on the same detection station in the visual light source, the detection efficiency is improved, and meanwhile, the cost is reduced.

Description

Visual light source and machine vision system

Technical Field

The utility model relates to a visual lighting technology field especially relates to and is used for a visual light source and machine vision system.

Background

Electronic components and precision parts are used as functional parts, and the quality of the components and precision parts is often determined to be required to be used subsequently, so the requirements on the quality inspection of the electronic components and precision parts in the production process are very strict.

The traditional manual visual inspection has extremely low quality inspection efficiency except for the omission of inspection caused by factors such as fatigue, inattention, subjective judgment and the like, and cannot meet the requirement of mass production at all. The way of using machine vision instead of visual inspection is becoming more and more widespread. However, as the market demands for the sizes of components and precision parts to be smaller and smaller, the quality requirement is higher and higher, and the quality control becomes more and more difficult in the production process.

At present, a plurality of detection stations are required to be arranged on different surfaces of a piece to be detected by an illuminating light source in the market, and the placing position of the piece to be detected is frequently changed in the detection process, so that the detection efficiency is low, and the cost is high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the embodiment of the utility model provides a visual light source and a machine vision system which can treat a detection piece at the same station to illuminate.

The embodiment of the utility model provides a solve its technical problem and adopt following technical scheme:

there is provided a visual light source comprising:

a light emitting assembly, the light emitting assembly;

the first cover shell is covered on the light-emitting component, and the light-emitting component faces to the inner wall of the first cover shell;

the second housing is connected with the first housing and provided with a detection cavity, an opening and a plurality of through holes, the opening and the through holes are communicated with the detection cavity, the opening extends from one side of the second housing to the other side of the second housing, the detection cavity is used for accommodating a piece to be detected, the opening is used for allowing the piece to be detected to enter and exit the detection cavity, and the through holes are used for installing image capturing equipment; wherein the content of the first and second substances,

the inner wall of the first housing may reflect the light to the inner wall of the second housing, and the light may be diffusely reflected a plurality of times between the inner walls of the first housing and the second housing.

In some embodiments, the first and second shells are each thin-walled hemispheres, and the first and second shells are joined to form a hollow sphere.

In some embodiments, the light emitting assembly includes a circuit board and a light emitting element disposed on and electrically connected to the circuit board and facing an inner wall of the first housing.

In some embodiments, the circuit board is in a ring shape, and the plurality of light emitting elements are distributed on the circuit board with the center of the circuit board as a circle center.

In some embodiments, the diameter of the light emitting element is 3.5 millimeters.

In some embodiments, the light emitting element is an LED lamp bead.

In some embodiments, the opening is disposed along a central axial plane of the second housing.

In some embodiments, the plurality of through holes are annularly distributed on the second housing.

In some embodiments, the inner walls of the first and second enclosures are each provided with a nano-reflective material.

On the other hand, the embodiment of the utility model provides a still provide a machine vision system, machine vision system includes camera and foretell visual light source, the camera install in the through-hole.

Compared with the prior art, the circuit board of the visual light source provided by the embodiment of the invention comprises a first cover shell, a second cover shell and a light-emitting component, wherein the first cover shell is connected with the second cover shell, the first cover shell is covered on the light-emitting component, the light-emitting component faces to the inner wall of the first cover shell, the light-emitting component is used for emitting light, the inner wall of the first cover shell can reflect the light to the inner wall of the second cover shell, the light can be subjected to multiple diffuse reflection between the inner walls of the first cover shell and the second cover shell, the second cover shell is provided with a detection cavity, an opening and a plurality of through holes, the opening and the through holes are communicated with the detection cavity, the opening extends from one side of the second cover shell to the other side of the second cover shell, the detection cavity is used for accommodating a piece to be detected, the opening is used for allowing the piece to be detected to pass through the detection cavity, the through hole is used for installing image capturing equipment. Through the arrangement, the effective illumination area can be enlarged, so that the piece to be detected can be illuminated and detected on the same detection station in the visual light source, the detection efficiency is improved, and meanwhile, the cost is reduced.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a perspective view of a visual light source according to an embodiment of the present invention;

fig. 2 is an exploded view of a visual light source according to an embodiment of the present invention;

fig. 3 is an exploded view of another angle of a visual light source according to an embodiment of the present invention;

fig. 4 is a schematic view of a machine vision system according to another embodiment of the present invention.

Detailed Description

In order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and specific examples. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. As used in this specification, the terms "upper," "lower," "inner," "outer," "vertical," "horizontal," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and simplicity in description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and are not to be considered limiting of the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.

Referring to fig. 1, an embodiment of the present invention provides a visual light source 100 for illuminating a to-be-detected object 110, where the to-be-detected object 110 may be an electronic component, a precision object, or the like. The visual light source 100 comprises a first housing 10, a second housing 20 and a light-emitting component 30, wherein the first housing 10 is connected with the second housing 20 to form an integral housing structure of the visual light source 100, the first housing 10 covers the light-emitting component 30, the light-emitting component 30 faces to the inner wall of the first housing 10, the light-emitting component 30 is used for emitting light, the inner wall of the first housing 10 can reflect the light to the inner wall of the second housing 20, the light can be diffused and reflected between the inner walls of the first housing 10 and the second housing 20 for multiple times and provide illumination for the surface of a piece 110 to be detected, and the piece 110 to be detected can enter and exit and be accommodated in the second housing 20.

Referring to fig. 2 and 3, the first housing 10 and the second housing 20 are both thin-walled hemispheres, and the first housing 10 and the second housing 20 are connected to form a hollow sphere, so that the light emitted from the light-emitting element 30 can be reflected on the spherical inner wall for multiple times by using the characteristic of the spherical inner wall, and the inside of the hollow sphere can generate enough and uniform light, so that the visual light source 100 has a large effective illumination area therein, and the visual light source 100 can provide illumination for each surface of the object 110 to be detected.

A connecting piece 12 is arranged between the first cover shell 10 and the second cover shell 20, and the connecting piece 12 sequentially penetrates through the first cover shell 10 and the second cover shell 20, so that the first cover shell 10 is fixedly connected with the second cover shell 20. Through the arrangement, the first housing 10 and the second housing 20 can be directly connected without adding a fixing part on the connecting surface of the first housing 10 and the second housing 20, so as to reduce the volume of the visual light source 100. In a specific implementation, the connector 12 may be a bolt.

In some other embodiments, the first housing 10 and the second housing 20 may have other shapes to form other shapes of housing structures, for example, the first housing 10 and the second housing 20 are connected to form a cylinder or a rectangular parallelepiped.

The first housing 10 is provided with a hemispherical reflective cavity 101 inside, the light emitting element 30 is accommodated in the reflective cavity 101, and light emitted by the light emitting element 30 is irradiated into the first housing 10 through the reflective cavity 101 and then reflected out of the reflective cavity 101 through the inner wall of the first housing 10.

Referring to fig. 2, in some embodiments, the first housing 10 is further provided with a step surface 102, and the step surface 102 extends along an axial direction of an inner wall of the first housing 10, wherein the step surface 102 is used for abutting against the light emitting element 30, so that the light emitting element 30 is fixed in the reflective cavity 101.

Referring to fig. 3, in some embodiments, the first housing 10 is further provided with a mounting base 103, the mounting base 103 is located at a dome of the first housing 10, and the mounting base 103 is used for fixing the visual light source 100 on the inspection apparatus or the inspection table.

Referring to fig. 1, the second housing 20 is provided with a detection cavity 201, an opening 202 and a plurality of through holes 203, and the opening 202 and the through holes 203 are both communicated with the detection cavity 201. The opening 202 extends from one side of the second housing 20 to the other side of the second housing 20, the detecting cavity 201 is used for accommodating the object 110 to be detected, the opening 202 is used for allowing the object 110 to be detected to enter and exit the detecting cavity 201, and the through hole 203 is used for installing the image capturing device, which may be the camera 200 in a specific implementation.

The piece 110 to be detected can enter the detection cavity 201 from one end of the opening 202 and be completely accommodated in the detection cavity 201, and the piece 110 to be detected can exit the detection cavity 201 from the other end of the opening 202 after detection is completed, that is, the opening 202 is communicated with the detection cavity 201 to form a detection channel, and the piece 110 to be detected can move on the detection channel and be detected.

Preferably, the plurality of through holes 203 are annularly distributed on the second housing 20, and the plurality of cameras 200 can be disposed around the center of the second housing 20 through the corresponding plurality of through holes 203, so that the plurality of cameras 200 can photograph and image the to-be-detected piece 110 from multiple angles.

In some embodiments, the opening 202 is disposed along a central axial plane of the second enclosure 20, i.e., the opening 202 extends along one side of a middle portion of the second enclosure 20 to the other side of the second enclosure 20. The arc length of the opening 202 can be set according to actual needs, and only the piece 110 to be detected can be completely accommodated in the detection cavity 201 to be illuminated when passing through the detection channel.

Referring to fig. 2 and 3, in some embodiments, the second housing 20 includes a left housing 21 and a right housing 22, and the left housing 21 and the right housing 22 are both smaller than half of the shape of the first housing 10, that is, the left housing 21 and the right housing 22 are both thin-walled smaller than a quarter of a sphere. The left and

right cases

21 and 22 are oppositely coupled to the first case 10, and the left and

right cases

21 and 22 are formed substantially in a hemispherical shape. The detection cavity 201 is formed between the left cover 21 and the right cover 22, and the openings 202 are formed on two opposite edges of the left cover 21 and the right cover 22.

Since the left housing 21 and the right housing 22 are formed in a substantially hemispherical shape, preferably, the four through holes 203 are annularly distributed on the second housing 20, that is, the four cameras 200 are disposed around the center of the second housing 20 through the corresponding four through holes 203, so that the plurality of cameras 200 can photograph the object 110 from an angle range of 360 degrees.

In some embodiments, the inner walls of the first housing 10 and the second housing 20 are both provided with a nano reflective material (not shown), and by using the characteristics of the nano reflective material that the absorbance is extremely low and the surface of the nano particles is micro concave-convex uniform, the inner walls of the first housing 10 and the second housing 20 can efficiently reflect light, the reflectivity can reach more than 95%, the reflectivity of the inner walls of the first housing 10 and the second housing 20 can be improved, the surface of the object 110 to be detected can be uniformly illuminated in an effective illumination area, and the camera 200 can capture uniform reflected light, thereby improving the imaging quality of the object 110 to be detected.

Referring to fig. 2 and fig. 3, the light emitting assembly 30 includes a circuit board 31 and a light emitting device 32, the circuit board 31 is mounted on the step surface 102 of the first housing 10, the light emitting device 32 is disposed on the circuit board 31 and electrically connected to the circuit board 31, the light emitting device 32 faces the inner wall of the first housing 10, and light emitted by the light emitting device 32 can be reflected to the inner wall of the second housing 20 through the inner wall of the first housing 10.

In some embodiments, the circuit board 31 has a ring shape, and the plurality of light emitting elements 32 are distributed on the circuit board 31 with the center of the circuit board 31 as the center of the circle. The light emitting elements 32 can be distributed on the circuit board 31 in a plurality of circles according to actual requirements, and the plurality of light emitting elements 32 in each circle are all arranged by taking the center of the circuit board 31 as the center of a circle.

Further, in order to improve the heat dissipation effect of the light emitting elements 32, the distance between two adjacent light emitting elements 32 is 2.5-3 mm, so as to facilitate the heat dissipation of the light emitting elements 32.

In order to ensure the brightness and the service life of the light emitting elements 32, the light emitting elements 32 are preferably 3.5 mm LED lamp beads.

In some embodiments, the visual light source 100 further comprises a circuit connector 40, the circuit connector 40 penetrates through the first housing 10 and is connected with the circuit board 31, and the circuit connector 40 is used for controlling the opening of the light-emitting element 32.

The visual light source 100 provided by the embodiment can be used as a special light source for appearance detection of precision components and the like in machine vision detection application, and the visual light source 100 provided by the embodiment can be widely applied to different detection illumination occasions, such as production quality detection occasions of 3C precision hardware, communication precision components, semiconductors, chip resistors and capacitors, and the like.

Referring to fig. 4, the arrow indicates a movement track of the object 110 passing through the visual light source 100. In another aspect, another embodiment of the present invention further provides a machine vision system 300, where the machine vision system 300 includes the above-mentioned vision light source 100 and the camera 200. The four cameras 200 are mounted in the four through holes 203 of the vision light source 100, the vision light source 100 is used for illuminating the to-be-detected piece 110, and the cameras 200 are used for shooting the to-be-detected piece 110. Specifically, the to-be-detected piece 110 may be sucked by the suction nozzle and enter the detection cavity 201 from one end of the opening 202 along the preset path, until the to-be-detected piece 110 moves to the center position of the detection cavity 201, the plurality of cameras 200 trigger image capture, and after the image capture, the suction nozzle withdraws the to-be-detected piece 110 from the detection cavity 201 along the other end of the preset path having the opening 202.

The machine vision system 300 provided by the embodiment has a large effective illumination area, the number of the required cameras 200 can be reduced, the four cameras 200 can shoot and capture the image of the to-be-detected piece 110 in 360 degrees, single-station simultaneous shooting can be realized, the machine volume is smaller, the product detection quality is improved, and meanwhile, the production efficiency is improved and the input cost is reduced.

It should be noted that the preferred embodiments of the present invention are described in the specification and the drawings, but the present invention can be realized in many different forms, and is not limited to the embodiments described in the specification, and these embodiments are not provided as additional limitations to the present invention, and are provided for the purpose of making the understanding of the disclosure of the present invention more thorough and complete. Moreover, the above features are combined with each other to form various embodiments not listed above, and all of them are considered as the scope of the present invention described in the specification; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.

Claims

1. A visual light source, comprising:

a light emitting assembly for emitting light;

2. The visual light source of claim 1,

the first encloser and the second encloser are both thin-walled hemispheres, and the first encloser and the second encloser are connected to form a hollow sphere.

3. A visual light source as claimed in claim 1 or claim 2,

the light emitting assembly includes a circuit board and a light emitting element, the light emitting element is disposed on and electrically connected to the circuit board, and the light emitting element faces an inner wall of the first housing.

4. The visual light source of claim 3,

the circuit board is in a ring shape, and the plurality of light-emitting elements are distributed on the circuit board by taking the center of the circuit board as a circle center.

5. The visual light source of claim 4,

the diameter of the light emitting element is 3.5 mm.

6. The visual light source of claim 5,

the light-emitting element is an LED lamp bead.

7. The visual light source of claim 2,

the opening is arranged along the central axial surface of the second cover shell.

8. The visual light source of claim 2,

the through holes are distributed in the second housing in an annular mode.

9. The visual light source of claim 1,

the inner walls of the first encloser and the second encloser are both provided with nanometer reflective materials.

10. A machine vision system comprising a camera and a visual light source as claimed in any one of claims 1 to 9, said camera being mounted to said through hole.