CN222050015U

CN222050015U - Optical detection equipment

Info

Publication number: CN222050015U
Application number: CN202420095671.XU
Authority: CN
Inventors: 雷建辉; 第之兴; 张佳丰; 汪琦
Original assignee: Keweisheng Vision Technology Suzhou Co ltd
Current assignee: Keweisheng Vision Technology Suzhou Co ltd
Priority date: 2024-01-15
Filing date: 2024-01-15
Publication date: 2024-11-22
Anticipated expiration: 2034-01-15

Abstract

The utility model discloses optical detection equipment, which comprises a carrier, wherein the carrier is loaded with materials and is driven by a driving device to move. At least one backlight detection mechanism and at least one positive light detection mechanism are arranged along the moving direction of the carrier. The backlight detection mechanism comprises a first light source and a first camera, and the material can move between the first light source and the first camera. The positive light detection mechanism comprises a second light source, a second camera and a spectroscope, wherein the second light source, the second camera and the spectroscope are always positioned on the same side of the material, light rays emitted by the second light source are vertically projected on the material after being reflected by the spectroscope, the light rays reflected by the material can pass through the spectroscope, and the light rays reflected by the spectroscope are parallel to the optical axis of the second camera.

Description

Optical detection equipment

Technical Field

The utility model relates to the technical field of image detection, in particular to optical detection equipment.

Background

Computer Numerical Control (CNC) technology is a critical automated manufacturing technology and has been widely used in the industry. The key principle of CNC technology is to control the movement of a machine tool or other industrial equipment by means of a computer program to perform the tasks of accurate cutting, engraving, milling, drilling and the like. The rise in this technology is due to the development of computer controlled systems that are capable of controlling motion in a highly accurate and programmable manner.

After the materials are processed on the numerically controlled machine tool, detection is required, and a traditional automatic optical detection (AOI) system is generally adopted. However, existing AOI systems present some challenges and limitations, one of which is a balance of accuracy and efficiency. Conventional AOI systems may perform well in terms of accuracy, but sacrifice processing speed, and therefore have limited application in high-volume manufacturing environments. Another problem is complexity, and many existing AOI systems require complex setup and calibration, resulting in line downtime and increased operating costs. When the material flows on the numerical control machine tool, the optical detection of each surface is particularly important on the premise that the material does not turn over. In some positions, the light source cannot pass through the material, and the camera and the light source cannot be arranged on two sides of the material, so that the optical detection of some surfaces of the material is influenced. Therefore, an optical detection device is needed to rapidly collect each side of the material, and complete the detection of the size and the qualification rate of the material.

Disclosure of utility model

In order to overcome the above-mentioned drawbacks, an object of the present utility model is to provide an optical inspection apparatus capable of rapidly inspecting the contour and appearance of a material.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an optical detection device comprises a carrier, wherein a material is carried on the carrier, the carrier is driven by a driving device to move, and at least one backlight detection mechanism and at least one positive light detection mechanism are arranged along the moving direction of the carrier;

the backlight detection mechanism comprises a first light source and a first camera, and the material can move between the first light source and the first camera;

The positive light detection mechanism comprises a second light source, a second camera and a spectroscope, wherein the second light source, the second camera and the spectroscope are always positioned on the same side of a material, light rays emitted by the second light source are reflected by the spectroscope and then vertically projected onto the material, the light rays reflected by the material can pass through the spectroscope, and the light rays reflected by the spectroscope are parallel to the optical axis of the second camera.

The utility model has the beneficial effects that: the optical detection device adopts a measurement mode of combining backlight and front light, so that image acquisition under different conditions of materials is met, the backlight detection mechanism can acquire images when light can pass through the materials, and the front light detection mechanism can acquire light when the light cannot pass through the materials. The light projected on the material is coaxial with the parallel of the optical axis of the camera, so that the light can be more uniformly beaten on the surface of a product, the stability and the detection efficiency of measured data are greatly improved, the detectable size range is enriched, and the production efficiency is improved.

Further, the optical axis of the second camera is perpendicular to the light emitted by the second light source, the spectroscope is located between the second light source and the second camera, and the spectroscope is inclined by 45 degrees towards the second camera along the light emitted by the second light source.

Furthermore, the positive light detection mechanism further comprises a second vertical frame, a second linear module is arranged on the second vertical frame, the second light source and the optical imaging mechanism are fixed on the second vertical frame, and the second camera is fixed on the second linear module and driven by the second linear module to approach or separate from the material. And the focal length of the second camera is adjusted through the second linear module, so that the photographing definition is improved.

Further, the second light source and the spectroscope are jointly arranged in a box body, and light transmission parts are arranged on two end faces of the box body, which are distributed along the optical axis direction of the second camera. The arrangement of the box body can avoid the light scattering emitted by the second light source and improve the light condensing degree of the light.

Furthermore, the light emitted by the first light source is coaxial with the optical axis of the first camera, so that the first light source is ensured to uniformly project on the material, and the first camera collects the pattern.

Furthermore, the backlight detection mechanism further comprises a first vertical frame and a first linear module, the first vertical frame and the first linear module are respectively located at two sides of the moving direction of the carrier, the first light source is arranged on the first vertical frame, and the first camera is fixed on the first linear module and driven by the first linear module to be close to or far away from the first light source. The position of the first camera is adjusted through the first linear module, namely the distance between the first camera and the material is adjusted, the distance adjustment of the first camera is realized, and the photographing definition is improved.

Further, two backlight detection mechanisms are arranged, the left face and the right face of the material are photographed respectively, two positive light detection mechanisms are arranged, and the upper face and the lower face of the material are photographed respectively.

Further, the optical detection device further comprises a thickness detection mechanism, the thickness detection mechanism comprises two 3D cameras which are arranged up and down, the material can move between the two 3D cameras, and optical axes of the two 3D cameras are coaxial. And 3D scanning and calculation are carried out on the materials of which the sizes cannot be directly detected by using backlight or front light, so that higher accuracy is realized.

Further, the carrier comprises a discharging area extending out of the driving device, and the discharging area extends out of the driving device, so that the driving device cannot shade materials in the discharging area. The discharging area comprises two positioning pins, and positioning holes for inserting the positioning pins are formed in the materials. And the carrier is provided with a yielding hole positioned right below the material. The yielding hole yields a positive light detection mechanism positioned below the carrier to photograph the lower surface of the material.

Further, the carrier further comprises two compressing assemblies, each compressing assembly comprises a compressing block, and the compressing blocks can move up and down to compress materials on the carrier.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present utility model;

FIG. 2 is a schematic perspective view of a positive light detection mechanism according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a positive light detection mechanism according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a backlight detection mechanism according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a connection structure between a driving device and a carrier according to an embodiment of the present utility model;

Fig. 6 is an enlarged view at a in fig. 5.

In the figure:

1. A carrier; 11. a discharging area; 111. a relief hole; 112. a compaction block; 2. a material; 3. a driving device; 4. a backlight detection mechanism; 41. a first light source; 42. a first camera; 43. a first stand; 44. a first linear module; 5. a positive light detection mechanism; 51. a second light source; 52. a second camera; 53. a beam splitter; 54. a second stand; 55. a second linear module; 56. a case body; 561. a light transmitting portion; 6. and a carrier plate.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

Referring to fig. 1, the optical detection device of the present utility model includes a carrier 1, a material 2 is carried on the carrier 1, the carrier 1 is driven by a driving device 3 to move along an X direction, the carrier 1 sequentially conveys the material 2 to a backlight detection mechanism 4 and a positive light detection mechanism 5 in a moving process, and the positive light detection mechanism 5 and the backlight detection mechanism 4 perform photographing detection on different surfaces of the material 2.

Four detection stations are sequentially arranged along the moving direction of the carrier 1, namely a first detection station, a second detection station, a third detection station and a fourth detection station, the positive light detection mechanism 5 is arranged in two, is respectively located at the first detection station and the fourth detection station, respectively performs photographing detection on the upper surface and the lower surface (two surfaces distributed in the Z direction) of the material 2, and the backlight detection mechanism 4 is arranged in two, is respectively located at the second detection station and the third detection station, respectively performs photographing detection on the left surface and the right surface (two surfaces distributed in the Y direction) of the material 2. Thus, photographing and visual detection are carried out on four surfaces of the material 2 to be detected.

In another embodiment, two or three detection stations may be provided, and the backlight detection mechanism 4 and the positive light detection mechanism 5 are provided according to the photographing requirements.

Referring to fig. 4, the backlight detecting mechanism 4 includes a first light source 41 and a first camera 42, and the material 2 can be moved between the first light source 41 and the first camera 42. Referring to fig. 2 and fig. 3, the positive light detection mechanism 5 includes a second light source 51, a second camera 52 and a beam splitter 53, where the second light source 51, the second camera 52 and the beam splitter 53 are always located on the same side of the material 2, light emitted by the second light source 51 is reflected by the beam splitter 53 and then vertically projected onto the material 2, and light reflected on the material 2 can pass through the beam splitter 53 and be received by the second camera 52, and light reflected by the beam splitter 53 is parallel to an optical axis of the second camera 52.

In this embodiment, the optical detection device adopts a measurement mode of combining backlight and front light, so that image acquisition under different conditions of the material 2 is satisfied, the backlight detection mechanism 4 can perform image acquisition when light can pass through the material 2, and the front light detection mechanism 5 can perform light acquisition when light cannot pass through the material 2. The stability and the detection efficiency of the measured data are greatly improved, the detectable size range is enriched, and the production efficiency is improved.

Referring to fig. 4, the light emitted by the first light source 41 is coaxial with the optical axis of the first camera 42, and the first light source 41 and the first camera 42 are respectively located at the left and right sides of the driving device 3.

The backlight detection mechanism 4 further includes a first stand 43 and a first linear module 44, where the first stand 43 and the first linear module 44 are respectively located at two sides of the moving direction of the carrier 1, the first light source 41 is disposed on the first stand 43, and the first camera 42 is fixed on the first linear module 44 and driven by the first linear module 44 to be close to or far away from the first light source 41. The position of the first camera 42 is adjusted through the first linear module 44, namely the distance between the first camera 42 and the material 2 is adjusted, so that the distance adjustment of the first camera 42 is realized, and the photographing definition is improved. For the same material 2, the position of the first camera 42 is usually adjusted and kept stationary before the detection. When changing the material 2, the position of the first camera 42 needs to be readjusted.

Referring to fig. 3, the optical axis of the second camera 52 is perpendicular to the light emitted from the second light source 51, the beam splitter 53 is located between the second light source 51 and the second camera 52, and the beam splitter 53 is inclined at 45 ° toward the second camera 52 along the light emitted from the second light source 51. The material 2 can move to the position right above or the position most below the beam splitter 53, and the light emitted by the second light source 51 is emitted onto the beam splitter 53 along the horizontal direction, reflected by the beam splitter 53, and then vertically downward, and irradiates the material 2. At this time, the second camera 52 is also located directly above or below the material 2, and photographs the material 2.

The second light source 51 and the spectroscope 53 are jointly arranged in a box body 56, the box body 56 is made of a light-proof material, light-transmitting parts 561 are arranged on two end faces of the box body 56, which are distributed along the optical axis direction of the second camera 52, and light rays can pass through the light-transmitting parts 561. The box 56 prevents the light emitted from the second light source 51 from being dispersed, and improves the light condensing degree of the light.

The light shielding part is a light hole formed in the box body 56, the light hole is formed in the upper end face and the lower end face of the box body 56, and a light-transmitting plate can be arranged at the light hole and is fixed with the box body 56.

Referring to fig. 2, the positive light detection mechanism 5 further includes a second stand 54, a second linear module 55 is disposed on the second stand 54, the second light source 51 and the optical imaging mechanism are fixed on the second stand 54, and the second camera 52 is fixed on the second linear module 55 and is driven by the second linear module 55 to approach or separate from the material 2. The focal length of the second camera 52 is adjusted by the second linear module 55, so that the photographing definition is improved.

The first camera 42 and the second camera 52 each include a camera body and a telecentric lens that are fixedly connected.

In this embodiment, the light projected on the material 2 is parallel and coaxial with the optical axis of the camera, so that the light can be more uniformly projected on the surface of the product, and the material 2 is clear and stable in edge due to the cooperation of the telecentric lens, and the noise in the detection process is effectively removed. The edges of the materials 2 are effectively distinguished, and the accuracy and stability of size measurement are improved.

In one embodiment, the optical detection device further comprises a thickness detection mechanism, the thickness detection mechanism comprises two 3D cameras arranged one above the other, the material 2 can be moved between the two 3D cameras, and optical axes of the two 3D cameras are coaxial. For the material 2 of which the size cannot be directly detected by using backlight or front light, 3D scanning and calculation are carried out, so that the accuracy is higher.

Referring to fig. 1, the backlight detecting mechanism 4, the normal light detecting mechanism 5, the thickness detecting mechanism, and the driving device 3 are collectively fixed on a carrier plate 6.

Referring to fig. 5, the driving device 3 is a linear module, and can drive the carrier 1 to reciprocate along a straight line, the carrier 1 is detachably connected with the driving device 3, and the carrier 1 can be replaced according to different materials 2.

Referring to fig. 6, the carrier 1 includes a discharge area 11 extending out of the driving device 3, where the discharge area 11 is a portion of the carrier 1 extending out of the driving device 3 along the Y direction, and the discharge area 11 extends out of the driving device 3, so that the driving device 3 does not shade the material 2 in the discharge area 11. The discharging area 11 comprises two positioning pins, positioning holes for inserting the positioning pins are formed in the material 2, and the positioning pins play a role in positioning. The carrier 1 is provided with a yielding hole 111 positioned right below the material 2, and a positive light detection mechanism 5 positioned below the carrier 1 for yielding the yielding hole 111 can photograph the lower surface of the material 2.

The carrier 1 further comprises two pressing assemblies, each pressing assembly comprises a pressing block 112, and the pressing blocks 112 can move up and down to press the materials 2 on the carrier 1.

The specific working procedure of this embodiment is as follows: the material 2 is placed on the carrier 1 and fixed by the locating pin and the pressing component. The driving device 3 drives the material 2 to move, and the material 2 is photographed and detected on the surface to be detected through all the positive light detection mechanisms 5, the backlight detection mechanisms 4 and the thickness detection mechanisms in sequence, so that the rapid detection requirement of the material 2 is met.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. The utility model provides an optical detection equipment, includes the carrier, bear the material on the carrier, the carrier removes its characterized in that under drive arrangement drive: at least one backlight detection mechanism and at least one positive light detection mechanism are arranged along the moving direction of the carrier;

2. The optical detection apparatus according to claim 1, wherein: the optical axis of the second camera is perpendicular to the light emitted by the second light source, the spectroscope is positioned between the second light source and the second camera, and the spectroscope inclines 45 degrees towards the second camera along the light emitted by the second light source.

3. The optical detection apparatus according to claim 1, wherein: the positive light detection mechanism further comprises a second vertical frame, a second linear module is arranged on the second vertical frame, the second light source and the optical imaging mechanism are fixed on the second vertical frame, and the second camera is fixed on the second linear module and is driven by the second linear module to approach or separate from the material.

4. The optical detection apparatus according to claim 1, wherein: the second light source and the spectroscope are jointly arranged in a box body, and light transmission parts are arranged on two end faces of the box body, which are distributed along the optical axis direction of the second camera.

5. The optical detection apparatus according to claim 1, wherein: the light emitted by the first light source is coaxial with the optical axis of the first camera.

6. The optical detection apparatus according to claim 1, wherein: the backlight detection mechanism further comprises a first vertical frame and a first linear module, the first vertical frame and the first linear module are respectively located at two sides of the moving direction of the carrier, the first light source is arranged on the first vertical frame, and the first camera is fixed on the first linear module and driven by the first linear module to be close to or far away from the first light source.

7. The optical detection apparatus according to any one of claims 1 to 6, wherein: the backlight detection mechanism is provided with two, and is used for photographing the left side and the right side of the material respectively, and the positive light detection mechanism is provided with two, and is used for photographing the upper side and the lower side of the material respectively.

8. The optical detection apparatus according to claim 1, wherein: the optical detection device further comprises a thickness detection mechanism, the thickness detection mechanism comprises two 3D cameras which are arranged up and down, the material can move between the two 3D cameras, and optical axes of the two 3D cameras are coaxial.

9. The optical detection apparatus according to claim 1, wherein: the carrier comprises a discharging area extending out of the driving device, the discharging area comprises two positioning pins, positioning holes for the positioning pins to be inserted are formed in the materials, and abdicating holes located right below the materials are formed in the carrier.

10. The optical detection apparatus according to claim 9, wherein: the carrier further comprises two compressing assemblies, each compressing assembly comprises a compressing block, and the compressing blocks can move up and down to compress materials on the carrier.