CN218032792U

CN218032792U - Visual detection light source and automatic optical detection equipment

Info

Publication number: CN218032792U
Application number: CN202221681639.7U
Authority: CN
Inventors: 林鑫
Original assignee: Guangzhou Luchen Intelligent Equipment Technology Co ltd
Current assignee: Guangzhou Luchen Intelligent Equipment Technology Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-12-13
Anticipated expiration: 2032-06-30

Abstract

The utility model discloses a visual detection light source and automatic optical detection equipment, this visual detection light source includes annular light source device and coaxial light source device, annular light source device includes first casing, first casing has the first chamber that holds, the first chamber wall that holds the chamber goes up the annular and is provided with first light-emitting component, first opening and second opening have been seted up to first casing, coaxial light source device includes the second casing, the second casing has the second and holds the chamber, third opening and fourth opening have been seted up to the second casing, fourth opening, the second holds the chamber, the third opening, the second opening, first chamber and the first opening of holding communicates along vertical direction in proper order, the second holds the intracavity and is provided with second light-emitting component and spectroscope, the spectroscope is located between third opening and the fourth opening, the light beam of second light-emitting component transmission can be reflected to the first chamber that holds by the spectroscope. Through setting up coaxial light source device, increase the coaxial light beam irradiation detection object of high depth of parallelism, guarantee imaging quality.

Description

Visual detection light source and automatic optical detection equipment

Technical Field

The utility model relates to an optical detection equipment technical field especially relates to a visual detection light source and contain automatic optical detection equipment of this visual detection light source.

Background

An Automatic Optical Inspection (AOI) apparatus is an apparatus for inspecting common defects encountered in the production of PCBA (Printed Circuit Board Assembly) boards based on Optical principles. The automatic optical detection equipment mainly comprises a rack and an optical detection unit arranged on the rack, wherein the optical detection unit photographs the PCBA board to obtain an image, and detects defects through image processing. The optical detection unit comprises a camera and a light source, the existing light source is mainly a multilayer lamp panel, a red LED lamp, a green LED lamp, a blue LED lamp and a white LED lamp are respectively arranged on the multilayer lamp panel, the multilayer lamp panel can be simultaneously opened or independently opened, and light with various colors irradiates a detection object on the PCBA board to obtain images through the camera. In some feature detection scenarios, for example: the surface smoothness, the roughness of tin-plated Mark point and tin-plated pad detect, and micro-hole or mar detect, and on the diffusion board that the light beam in this type of light source passed through the bowl form was projected the detection object, received the structure influence light beam and be difficult to throw into camera lens after PCBA board reflection, and then caused the formation of image dark partially, can't detect the operation.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: the coaxial light source device is arranged on the annular light source device, so that coaxial light beams with high parallelism are increased to irradiate a detection object, and the imaging quality is ensured.

The embodiment of the utility model provides a another aim at: the automatic optical detection equipment can adapt to different detection scenes and has comprehensive detection functions.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a visual detection light source, includes annular light source device and coaxial light source device, coaxial light source device set up in the top of annular light source device, annular light source device includes first casing, first casing has the first chamber that holds, the first chamber wall that holds the chamber goes up the annular and is provided with first light-emitting component, first opening and second opening have been seted up respectively to the bottom and the top of first casing, coaxial light source device includes the second casing, the second casing has the second and holds the chamber, third opening and fourth opening have been seted up respectively to the bottom and the top of second casing, the fourth opening the second hold the chamber the third opening the second opening the first chamber that holds with first opening communicates in proper order along vertical direction, the second holds the intracavity and is provided with second light-emitting component and spectroscope, the spectroscope be located the third opening with between the fourth opening, just the spectroscope with second light-emitting component is the setting, the light beam of second light-emitting component transmission can by the spectroscope reflection extremely the first contained angle that holds.

As a preferable aspect of the visual inspection light source, the first opening, the second opening, the third opening, and the fourth opening are coaxial.

As a preferred scheme of visual inspection light source, first light-emitting component includes a plurality of first lamp plates and first diffuser plate, first diffuser plate is the bowl form, first diffuser plate set up in on the first chamber wall that holds the chamber, it is a plurality of first lamp plate is located first diffuser plate with between the chamber wall, follow the top to the bottom of first casing, it is a plurality of first lamp plate is in proper order around one side of first diffuser plate.

As a preferred scheme of the visual detection light source, the lighting device further comprises a third light-emitting assembly, the third light-emitting assembly is arranged on one side, away from the first lamp panel, of the first diffusion plate, and the third light-emitting assembly is adjacent to the first opening.

As a preferred scheme of visual detection light source, the second light-emitting component includes second lamp plate and second diffuser plate, the second diffuser plate vertical set up in the second holds the chamber and will the second holds the chamber and cuts apart formation main cavity room and vice cavity, the third opening with the fourth opening all with main cavity room intercommunication, the second lamp plate set up in vice cavity, just the second lamp plate with the second diffuser plate is parallel.

As a preferable embodiment of the visual inspection light source, an angle between the beam splitter and the second diffusion plate is 45 °.

As a preferred scheme of visual detection light source, the second lamp plate includes a plurality of white light lamp pearls that are array distribution.

As a preferable mode of the visual detection light source, a part of the second housing is inserted into the second opening.

As a preferable scheme of the visual detection light source, the first opening and the fourth opening are covered with glass plates.

The beneficial effects of the utility model are that: according to the visual detection light source, the coaxial light source device is additionally arranged above the annular light source device, and the coaxial light source is used for projecting the coaxial light beams with high parallelism to the PCBA board, so that the light beams can be smoothly projected upwards to the camera lens after being reflected by the PCBA board, the problem of dark imaging is solved, and the imaging quality during detection is ensured.

The automatic optical detection equipment comprises the visual detection light source and the camera assembly, wherein the camera assembly is positioned on one side, close to the fourth opening, of the visual detection light source.

The beneficial effects of the utility model are that: the visual inspection light source is provided with an upper coaxial light source device which can project a vertical downward coaxial light beam. There is also an underlying annular light source device that projects high angle light and low angle light around the test object. Therefore, the automatic optical detection equipment can adapt to different detection scenes, can be used for carrying out plane image detection, concave-convex information detection, micro-hole or scratch detection and the like on a detection object on the PCBA board, and has the characteristic of comprehensive detection function.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

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

Fig. 2 is a cross-sectional view of the visual inspection light source according to the embodiment of the present invention.

In the figure:

1. an annular light source device; 11. a first housing; 110. a first accommodating chamber; 111. a first opening; 112. a second opening; 113. a first annular step; 114. a second annular step; 115. a third annular step; 116. a fourth annular step; 12. a first lamp panel; 13. a first diffusion plate; 14. a glass plate; 2. a coaxial light source device; 21. a second housing; 211. a main chamber; 212. a secondary chamber; 213. a third opening; 214. a fourth opening; 22. a second lamp panel; 23. a second diffusion plate; 24. a beam splitter; 3. a third light emitting element; 4. and a terminal.

Detailed Description

In order to make the technical problems, the adopted technical solutions and the achieved technical effects of the present invention clearer, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in FIG. 1 and FIG. 2, the present invention provides a visual inspection light source for providing a light source for an automatic optical inspection device. The top of visual detection light source is provided with the camera, and the PCBA board is placed in the below of visual detection light source, and the light beam that the visual detection light source sent shines on the PCBA board to get into the camera through the reflection of PCBA board, and then make the camera obtain the image of PCBA board. The visual inspection light source comprises an annular light source device 1 and a coaxial light source device 2. The annular light source device 1 is used for irradiating annular light beams with low angles to the PCBA board, namely the light beams are irradiated from the peripheral direction of the PCBA board; the coaxial light source device 2 is used to irradiate a PCBA board with a high-angle axial light beam, that is, a light beam is irradiated from directly above the PCBA board. The annular light source device 1 includes a first housing 11 and a first light emitting component, the first housing 11 has a first accommodating cavity 110, a first opening 111 is opened at the bottom of the first housing 11, a second opening 112 is opened at the top of the first housing 11, the first opening 111 and the second opening 112 are both communicated with the first accommodating cavity 110, and the first opening 111 faces the PCBA board. The first light-emitting assembly is annularly arranged on the wall of the first accommodating cavity 110, and light beams emitted by the first light-emitting assembly enter the first accommodating cavity 110 and irradiate the PCBA board through the first opening 111. The coaxial light source device 2 includes a second housing 21, a second light emitting component and a beam splitter 24, the second housing 21 has a second accommodating cavity, a third opening 213 is opened at the bottom of the second housing 21, a fourth opening 214 is opened at the top of the second housing 21, the third opening 213 and the fourth opening 214 are both communicated with the second accommodating cavity, and the third opening 213 faces the camera. From the top to the bottom of the visual detection light source, the fourth opening 214, the second accommodating cavity, the third opening 213, the second opening 112, the first accommodating cavity 110 and the first opening 111 are sequentially communicated in the vertical direction, so that light beams emitted by the coaxial light source device 2 and the annular light source device 1 can be irradiated to a camera above after being reflected by a PCBA board below, and imaging is achieved. The camera is arranged on one side of the coaxial light source device 2, which is far away from the annular light source device 1, and the lens of the camera is opposite to the fourth opening 214. The second light-emitting component and the beam splitter 24 are disposed in the second accommodating cavity, the beam splitter 24 is located between the third opening 213 and the fourth opening 214, and the beam splitter 24 and the second light-emitting component form an included angle, so that the light beam emitted by the second light-emitting component can be reflected by the beam splitter 24 to irradiate the first accommodating cavity 110 downwards. The beam splitter 24 has both light reflecting and light transmitting properties, and one function of the beam splitter 24 is to receive light from the second light emitting component and reflect the light to be projected onto the PCBA board through the ring-shaped light source device 1. A portion of the light beam emitted by the second light-emitting assembly is reflected into the first receiving cavity 110, i.e., onto the PCBA board. The beam splitter 24 also functions to receive light reflected from the PCBA board and transmit the light directly to the side of the beam splitter 24 facing the camera, so that part of the light reflected by the PCBA board and projected upwards can pass through the beam splitter 24 to enter the camera. In this embodiment, the coaxial light source device 2 is added above the annular light source device 1, and the coaxial light source device 2 is used to project a coaxial light beam with high parallelism to the PCBA board, so that the light beam can be smoothly projected upwards to the camera lens after being reflected by the PCBA board, thereby solving the problem of dark imaging and ensuring the imaging quality during detection.

Specifically, referring to fig. 2, the first opening 111, the second opening 112, the third opening 213, and the fourth opening 214 are coaxial. The first opening 111 is shaped to fit the first diffusion plate 13 having a bowl shape, and the first opening 111 is shaped to be circular. The camera lens is opposite to the fourth opening 214, the shape of the fourth opening 214 is matched with that of the camera lens, and the structure can enable the camera lens to extend into the fourth opening 214, so that the whole structure is compact, and the light reflection caused by the adjacent area of the side wall of the fourth opening 241 can be avoided. The first opening 111 and the fourth opening 214 are covered with a glass plate 14, and the glass plate 14 is a transparent glass plate, so that the light beam can pass through the glass plate 14. The glass plate 14 is used for dust prevention to prevent external dust from entering the inside of the visual inspection light source.

In another embodiment, a portion of the second housing 21 is inserted into the second opening 112. It will be appreciated that inserting the end of the second housing 21 near the first housing 11 into the second opening 112 is beneficial to reduce the overall height of the visual inspection light source, making the overall structure compact. In this embodiment, the second housing 21 has a rectangular parallelepiped shape, the second opening 112 is rectangular, and one end of the second housing 21 close to the first housing 11 is inserted into the second opening 112.

Specifically, referring to fig. 2, the first light emitting assembly includes a plurality of first lamp panels 12 and first diffusion plates 13, the first diffusion plates 13 are bowl-shaped, a small end of each first diffusion plate 13 is located at one side of the second opening 112, a large end of each first diffusion plate 13 is located at one side of the first opening 111, and the first diffusion plates 13 are disposed on the cavity wall of the first accommodating cavity 110. The first diffusion plate 13 is a translucent plate which is processed by atomization or frosting, and the direct light emitted by the first light-emitting assembly can become diffused light after passing through the first diffusion plate 13, so as to provide better diffusion effect, and obtain uniform and stable diffused light irradiation area. This structure enables the light beam emitted by the first light-emitting element to uniformly cover the surface of the PCBA board corresponding to the first opening 111. A plurality of first lamp panels 12 are located between the first chamber wall that holds chamber 110 and first diffuser plate 13, and from the top to the bottom of first casing 11, a plurality of first lamp panels 12 surround in proper order around the first diffuser plate 13 towards the first one side that holds the chamber wall of chamber 110. In this embodiment, first lamp plate 12 is three, and three first lamp plate 12 from the top down arranges in proper order and the cladding is in the outside of first diffuser plate 13 to make the light beam that sends on all first lamp plates 12 can both project on first diffuser plate 13. Be array distribution on the first lamp plate 12 that is close to the top of first casing 11 and have a plurality of ruddiness lamp pearl and white light lamp pearl for throw ruddiness and white light to PCBA board. Be array distribution on first lamp plate 12 near the bottom of first casing 11 and have a plurality of blue light lamp pearls and white light lamp pearl for throw blue light and white light to PCBA board. Be the array on the first lamp plate 12 that is located the middle part and distribute a plurality of green glow lamp pearls for throw the green glow to the PCBA board.

The first housing 11 is stepped, and the cross section of the first housing 11 is circular. From the top to the bottom of the first housing 11, the first housing 11 includes a first annular step 113, a second annular step 114, a third annular step 115, and a fourth annular step 116 connected in this order. The four annular steps are coaxially arranged, the radius of the four annular steps is gradually increased, and the structure enables the first shell 11 to be in a shape with a small top and a large bottom, so that the appearance of the first shell 11 is matched with that of the first diffusion plate 13. Among the three first lamp panels 12, the first lamp panel 12 located above is installed between the first annular step 113 and the second annular step 114, and two ends of the first lamp panel 12 are connected with the first annular step 113 and the second annular step 114 respectively; the first lamp panel 12 located in the middle is installed between the second annular step 114 and the third annular step 115, and two ends of the first lamp panel 12 are connected with the second annular step 114 and the third annular step 115 respectively; first lamp plate 12 that is located the below is installed between third annular step 115 and fourth annular step 116, and the both ends of this first lamp plate 12 are connected with third annular step 115 and fourth annular step 116 respectively.

The visual inspection light source further comprises a third light-emitting assembly 3, the third light-emitting assembly 3 is in a circular ring shape, the third light-emitting assembly 3 is arranged on one side, away from the first lamp panel 12, of the first diffusion plate 13, and the third light-emitting assembly 3 is located at a position close to the first opening 111. Third light emitting component 3 includes third lamp plate and connecting piece, and the third lamp plate is the ring form, and the connecting piece setting is in the week portion of third lamp plate, and the third lamp plate passes through the connecting piece to be fixed on first casing 11. Array distribution has a plurality of white light lamp pearls on the third lamp plate, and white light lamp pearl is located the third lamp plate and deviates from a side of first opening 111. The light beam that the third lamp plate sent out throws on PCBA board after 13 reflections of first diffuser plates. This structure makes the light beam that the third lamp plate sent more even. Simultaneously, because white light lamp pearl on the third lamp plate is towards the top and is emitted the light beam, be favorable to avoiding white light lamp pearl to take place mirror surface reflection and get into the camera on PCBA board, and then avoid appearing the reflection of light.

Specifically, referring to fig. 2, the second light emitting assembly includes a second lamp panel 22 and a second diffusion plate 23. The second diffusion plate 23 is made of the same material as the first diffusion plate 13, and is used for diffusing the light beam of the second lamp panel 22 to form a uniform light beam. The second lamp panel 22 and the second diffusion plate 23 are rectangular. Second diffuser plate 23 vertically sets up in the second holds the intracavity, and second diffuser plate 23 holds the chamber with the second and cuts apart formation main cavity 211 and sub-cavity 212, and third opening 213 and fourth opening 214 communicate with main cavity 211, and sub-cavity 212 is outside the orthographic projection scope of fourth opening 214, and second lamp plate 22 is installed in sub-cavity 212. This structure can avoid second lamp plate 22 to cause the interference to the formation of image of camera. It has a plurality of white light lamp pearls to be array distribution on the second lamp plate 22, and second lamp plate 22 is parallel and the interval setting with second diffuser plate 23. The light beam emitted from the second lamp panel 22 passes through the second diffusion plate 23 and is projected into the main chamber 211. The beam splitter 24 is disposed in the main chamber 211, and an included angle between the beam splitter 24 and the second diffusion plate 23 is 45 °. This structure makes one side of beam splitter 24 face second diffuser 23, and the other side faces fourth opening 214, and the light beam of second lamp panel 22 passes through beam splitter 24's reflection and projects on PCBA board, and the reflection light that upwards on PCBA board passes through beam splitter 24 and transmits to the camera.

Specifically, as shown in fig. 1, this visual detection light source still includes a plurality of binding post 4, and binding post 4 is connected with first lamp plate 12, second lamp plate 22 and third lamp plate, and binding post 4 is used for being connected with automated optical inspection equipment's the control unit to the bright of lamp pearl goes out on the control each lamp plate.

The utility model also provides an automatic optical detection equipment, including foretell visual detection light source and camera subassembly, the camera subassembly is used for taking a picture to the PCBA board, and the camera subassembly is located one side that the visual detection light source is close to fourth opening 214. The visual detection light source and the camera component form an optical detection unit, the optical detection unit is installed on a rack of the automatic optical detection equipment through a motion component, and the motion component drives the optical detection unit to move along the surface of the PCBA board. It will be appreciated that the camera assembly is located above the second housing 21, and reflected light on the PCBA board can pass through the first opening 111, the first receiving chamber 110, the second opening 112, the third opening 213, the main chamber 211 and the fourth opening 214 in order to enter the lens of the camera assembly. Since the visual inspection light source has the coaxial light source device 2 positioned above, it can project a coaxial light beam vertically downward. There is also an annular light source device 1 located below which can project high-angle light and low-angle light that surrounds the detection object. Therefore, the automatic optical detection equipment can adapt to different detection scenes, can be used for carrying out plane image detection, concave-convex information detection, micro-hole or scratch detection and the like on a detection object on the PCBA board, and has the characteristic of comprehensive detection function.

Claims

1. The utility model provides a visual detection light source, its characterized in that, includes annular light source device and coaxial light source device, coaxial light source device set up in annular light source device's top, annular light source device includes first casing, first casing has first chamber that holds, the annular is provided with first light-emitting component on the first chamber wall that holds the chamber, first opening and second opening have been seted up respectively to the bottom and the top of first casing, coaxial light source device includes the second casing, the second casing has the second and holds the chamber, third opening and fourth opening have been seted up respectively to the bottom and the top of second casing, the fourth opening the second hold the chamber the third opening the second opening the first chamber that holds with first opening communicates in proper order along vertical direction, the second holds the intracavity and is provided with second light-emitting component and spectroscope, the spectroscope be located the third opening with between the fourth spectroscope opening, just the second light-emitting component be the setting, the light beam of second light-emitting component transmission can by the reflection contained angle extremely first intracavity holds.

2. The visual inspection light source of claim 1, wherein the first opening, the second opening, the third opening, and the fourth opening are coaxial.

3. The visual inspection light source of claim 1, wherein the first light emitting assembly comprises a plurality of first light panels and a first diffusion plate, the first diffusion plate is in a bowl shape, the first diffusion plate is disposed on a cavity wall of the first accommodating cavity, the plurality of first light panels are disposed between the first diffusion plate and the cavity wall, and the plurality of first light panels sequentially surround one side of the first diffusion plate from the top to the bottom of the first housing.

4. The visual inspection light source of claim 3, further comprising a third light emitting assembly disposed on a side of the first diffuser plate facing away from the first lamp panel, the third light emitting assembly being adjacent to the first opening.

5. The visual inspection light source of claim 1, wherein the second light emitting assembly comprises a second light panel and a second diffuser panel, the second diffuser panel is vertically disposed in the second accommodating cavity and divides the second accommodating cavity into a main cavity and an auxiliary cavity, the third opening and the fourth opening are both communicated with the main cavity, the second light panel is disposed in the auxiliary cavity, and the second light panel is parallel to the second diffuser panel.

6. The visual inspection light source of claim 5, wherein the beam splitter is angled at 45 ° to the second diffuser plate.

7. The visual inspection light source of claim 5, wherein the second light panel includes a plurality of white light beads distributed in an array.

8. The visual inspection light source of any one of claims 1 to 7, wherein a portion of the second housing is plugged into the second opening.

9. The visual inspection light source of any one of claims 1 to 7, wherein the first opening and the fourth opening are each covered with a glass plate.

10. An automated optical inspection apparatus comprising the vision inspection light source of any one of claims 1 to 9 and a camera assembly, the camera assembly being located on a side of the vision inspection light source adjacent the fourth opening.