Collimation alignment detection structure
By adopting a collimation alignment detection structure in circuit board detection, and using an imaging processing mechanism and refractive components to achieve simultaneous detection of workpiece components, it solves the problems of many detection equipment, inconvenient operation, and difficult to ensure accuracy in the prior art, and achieves efficient and accurate detection effects.
Patent Information
- Application Number
- CN202510070702.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2025-04-29
AI Technical Summary
In the process of detecting workpieces such as circuit boards, the prior art requires two sets of testing equipment to detect two sets of components, resulting in inconvenience in operation, waste of resources and difficult to ensure detection accuracy.
A collimation alignment detection structure is adopted, including a detection mechanism and an imaging processing mechanism, and the first imaging light source and the second imaging light source respectively explore the parts distributed in the vertical direction of the workpiece, and use the refractive component to accurately refract the reflected light to the detection mechanism, so as to achieve simultaneous image capture, photographing, detection and comparison of two groups of components.
It effectively reduces the number of applications of the detection body and ensures the accuracy of detection. Only one set of detection bodies needs to be calibrated to ensure accurate detection of multiple sets of components.
Smart Images
Figure CN119901744A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of alignment detection equipment, and in particular to an alignment detection structure. Background Art
[0002] During the production and processing of circuit boards with tiny components, it is necessary to inspect the surface defects, size positioning and other processing conditions of the tiny components on their surface, so optical inspection equipment is needed.
[0003] During the actual processing and inspection of workpieces such as circuit boards, some workpieces require that the positions of components distributed along their vertical direction be aligned, and that the installation positions and sizes on the workpieces be the same. In order to achieve this inspection requirement, the operator will place two sets of inspection equipment between the two sets of components distributed above and below the workpiece, and the two sets of inspection equipment are used to inspect the two sets of components distributed above and below. After the photos taken by the two sets of inspection equipment are formed and uploaded to the cloud, the online analysis system electrically connected to the inspection equipment can analyze the features in the photos and determine whether there are surface defects on the parts; in addition, the online analysis system can also compare the photos taken by the two sets of inspection equipment, and by comparing the clarity of the photos, the position and size of the components on the circuit board, it can determine whether the two sets of components distributed above and below are aligned in the vertical direction on the workpiece, and whether the installation positions and sizes on the workpiece are the same.
[0004] However, the inspection of a group of workpiece parts by two groups of inspection equipment causes inconvenience in operation and wastes inspection resources. Moreover, the two groups of inspection equipment need to be calibrated synchronously before each operation. Once the calibration is out of sync, the inspection accuracy is easily affected, so there is room for improvement. Summary of the invention
[0005] Purpose of the invention: The present application provides an alignment detection structure, aiming to improve the above-mentioned technical problems.
[0006] Technical solution: The present application provides a collimation alignment detection structure for detecting surface defects of components distributed in a vertical direction on a group of workpieces, and whether their positions and sizes on the workpieces are the same. The collimation alignment detection structure includes: a detection mechanism for capturing images of components on the workpiece, and capable of detecting and comparing the captured contents; an imaging processing mechanism, wherein the imaging processing mechanism includes a first imaging light source, a refraction component and a second imaging light source sequentially arranged in the vertical direction; wherein the refraction component is configured on the imaging path of the detection mechanism; the first imaging light source and the second imaging light source are respectively used to irradiate components distributed in the vertical direction of the workpiece, and the components irradiated by the first imaging light source and / or the second imaging light source can be imaged, detected and compared by the detection mechanism through the refraction component; the distance between the first imaging light source and the adjacent components is different from the distance between the second imaging light source and the adjacent components; the imaging distance from the components close to the first imaging light source to the detection mechanism through the refraction component is equal to the imaging distance from the components close to the second imaging light source to the detection mechanism through the refraction component.
[0007] By adopting the above technical solution, the first imaging light source and the second imaging light source respectively searchlight the components distributed along the vertical direction of the workpiece, so that the components can be illuminated, and the illuminated components can emit reflected light, and the emitted reflected light can be accurately refracted toward the detection mechanism through the refraction component, and then through a set of detection mechanisms, two groups of components distributed along the vertical direction of the workpiece can be imaged, photographed, detected and compared at the same time, effectively reducing the number of detection bodies used; in addition, by changing the distance between the first imaging light source and the second imaging light source and the adjacent components, the imaging distances of different components to the detection mechanism are made the same, thereby ensuring the accuracy of the detection body in imaging and taking photos. Therefore, only one set of detection bodies needs to be calibrated to ensure the accuracy of the detection body in detecting multiple groups of components at the same time.
[0008] Furthermore, the detection mechanism includes: a detection body, which is used to detect and compare components located on the imaging path; an imaging lens, which is configured on the detection body and located on the imaging path, and is used to enable the detection body to image the components located on the imaging path; and a distance adjustment component, which is used to enable the detection body to move relative to the imaging lens along the extension direction of the imaging path so that the detection body can focus on the components located on the imaging path.
[0009] By adopting the above technical solution, the detection body uses the imaging lens to capture, photograph, detect and compare the features located on the imaging path. The imaging lens increases the range of the detection body that can capture images; the distance adjustment component can enable the detection body to move relative to the imaging lens, so that the detection body can focus and capture features at different positions on the imaging path through the imaging lens, thereby ensuring the accuracy of the detection body's imaging and the clarity of the shooting.
[0010] Furthermore, the distance adjusting assembly includes: a base plate, extending in the horizontal direction, for carrying the detection body and the imaging lens; the imaging lens is fixed on the base plate; a top cover, fixedly arranged on the detection body and slidably connected to the base plate, so that the detection body can move relative to the imaging lens; an end frame, arranged on the base plate; a distance adjusting screw is threadedly connected to the end frame, and the distance adjusting screw passes through one end of the end frame and is arranged in the top cover and can rotate relative to the top cover; when the distance adjusting screw is threadedly rotated on the end frame, the distance adjusting screw can carry the top cover and the detection body to move relative to the imaging lens.
[0011] By adopting the above technical solution, the top cover is fixedly connected to the detection body, and after the pitch-adjusting screw is rotated in the clockwise direction, one end of the pitch-adjusting screw inside the top cover can push the top cover and the detection body to move toward the imaging lens along the imaging path; after the operator rotates the pitch-adjusting screw in the counterclockwise direction, one end of the pitch-adjusting screw inside the top cover can carry the top cover and the detection body to move away from the imaging lens along the imaging path; in this process, the operator rotates the pitch-adjusting screw in the clockwise or counterclockwise direction, which can quickly and conveniently realize the movement of the lens of the detection body relative to the imaging lens, and then complete the rapid focusing of the detection body, thereby improving the convenience and accuracy of the operator in capturing and shooting different features on the imaging path through the detection body.
[0012] Furthermore, the refractive component includes: a connecting plate, which is arranged on the imaging path; the two opposite sides of the connecting plate in the vertical direction are respectively used for installing the first imaging light source and the second imaging light source; a semi-transmissive and semi-reflective prism block; a first channel for installing the semi-transmissive prism block is provided through the connecting plate; the refractive surface of the semi-transmissive and semi-reflective prism block is inside the semi-transmissive prism block and coincides with one of the diagonals of the semi-transmissive prism block, and the angle between the side wall of the refractive surface facing the imaging lens and the horizontal plane is 45°; a second channel extending along the imaging path is provided through the connecting plate in the horizontal direction, and the second channel is connected to the first channel.
[0013] By adopting the above technical scheme, in addition to being able to install the splitter prism block, the first channel can also form a channel together with the second channel for the reflected light of components located at different positions of the workpiece; after the reflected light of the components enters the first channel from the top of the connecting plate in the vertical direction, part of the reflected light can pass through the refractive surface and then irradiate the bottom of the connecting plate; another part of the reflected light can be reflected along the imaging path away from the imaging lens through the refractive surface; after entering the first channel from the bottom of the connecting plate in the vertical direction, part of the reflected light can pass through the refractive surface and then irradiate the top of the connecting plate; another part of the reflected light can be reflected along the imaging path toward the direction close to the imaging lens through the refractive surface; this process achieves the effect that the reflected light emitted by the components located above and below the connecting plate can be placed on the imaging path, ensuring that the components located below the connecting plate can be directly imaged, photographed, detected and compared by the detection body.
[0014] Furthermore, the first imaging light source includes a first searchlight located at the top of the connecting plate, and a first light guide channel connected to the first channel is penetrated by the first searchlight; the refraction component also includes a reflector, and the reflector is located on the side of the splitter prism block away from the imaging lens, and the reflector is located on the imaging path; after the parts close to the first searchlight are irradiated by the first searchlight, the reflected light passes through the first light guide channel in the vertical direction and can be reflected to the reflector through the refractive surface along the imaging path, and the reflector can reflect the reflected light again and make the reflected light pass through the refractive surface along the imaging path before being imaged by the detection body.
[0015] By adopting the above technical solution, after the first spotlight irradiates the components located above the connecting plate, the components located above the connecting plate can be illuminated, and the reflected light emitted by the illuminated components can pass through the first light guide channel in the vertical direction and enter the dichroic prism block; part of the reflected light passes through the refractive surface and then passes through the second light guide channel, and another part of the reflected light is reflected by the refractive surface and then refracted toward the reflector along the imaging path; the reflector can reflect the reflected light back to the dichroic prism block again, and part of the reflected light reflected back to the dichroic prism block can pass through the refractive surface and refracted toward the imaging lens along the imaging path, and can then be imaged and photographed by the detection body with the imaging lens.
[0016] Furthermore, the second imaging light source includes a second searchlight located at the bottom of the connecting plate, and a second light guide channel connected to the first channel is penetrated by the second searchlight; after the components close to the second searchlight are irradiated by the second searchlight, their reflected light passes through the second light channel in the vertical direction and can be reflected along the imaging path through the refractive surface toward the detection body, and can then be imaged by the detection body.
[0017] By adopting the above technical solution, the second spotlight can illuminate the components located below the connecting plate. After the components located below the connecting plate are illuminated, the reflected light released by them can pass through the second light guide channel in the vertical direction and enter the dichroic prism block; part of the reflected light can be refracted toward the imaging lens along the imaging path direction under the reflection action of the refractive surface, and then can be imaged and photographed by the detection body with the imaging lens.
[0018] Furthermore, the distance between the first searchlight and the nearby components is greater than the distance between the second searchlight and the nearby components.
[0019] By adopting the above technical scheme, since the components located above the connecting plate need to be reflected by the reflector when the inspection body takes an image, the imaging distance generated by the inspection body when taking an image of the components above the connecting plate is greater than the imaging distance generated when the inspection body takes an image of the components below the connecting plate, which makes it easy for at least one of the photos to be out of focus or unclear when the inspection body takes images of the components above and below the connecting plate at the same time; therefore, after setting the distance between the first searchlight and the nearby components to be greater than the distance between the second searchlight and the nearby components, by shortening the physical distance between the second searchlight and the components below the connecting plate, the imaging distance of the components located above the connecting plate when the inspection body successfully takes an image can be equal to the imaging distance of the components located below the connecting plate when the inspection body successfully takes an image, which helps to ensure the imaging accuracy and shooting clarity of the inspection body.
[0020] Furthermore, the first searchlight and the second searchlight are both bowl-shaped searchlights, and the height dimension of the second searchlight is greater than the height dimension of the first searchlight.
[0021] By adopting the above technical solution, the bowl-shaped searchlight has the effect of sufficient illumination surface and is not easy to produce light and shadow interference, which helps to ensure the brightness of the illuminated parts and the penetration intensity of the reflected light emitted by the illuminated parts; making the height of the second searchlight larger than the height of the first searchlight can achieve the distance between the first searchlight and the nearby parts greater than the distance between the second searchlight and the nearby parts in the fastest and lowest cost, which helps to quickly and stably ensure that the imaging distance of the parts located above the connecting plate when the image is successfully taken by the inspection body is equal to the imaging distance of the parts located below the connecting plate when the image is successfully taken by the inspection body.
[0022] In summary, this application has at least the following beneficial technical effects: The first imaging light source and the second imaging light source respectively searchlight the components distributed along the vertical direction of the workpiece, so that the components can be illuminated, and the illuminated components can emit reflected light, and the emitted reflected light can be accurately refracted toward the detection mechanism through the refraction component, and then through a set of detection mechanisms, two groups of components distributed along the vertical direction of the workpiece can be imaged, photographed, detected and compared at the same time, effectively reducing the number of detection bodies used; in addition, by changing the distance between the first imaging light source and the second imaging light source and the adjacent components, the imaging distances of different components to the detection mechanism are made the same, thereby ensuring the accuracy of the detection body in imaging and taking photos. Therefore, only one set of detection bodies needs to be calibrated to ensure the accuracy of the detection body in detecting multiple groups of components at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of an alignment detection structure in an embodiment of the present application; Figure 2 It is an exploded schematic diagram of the positional relationship between the detection body, the bottom plate and the top cover in the embodiment of the present application; Figure 3 is an exploded schematic diagram of the positional relationship between the imaging processing mechanism and the detection mechanism in the embodiment of the present application; Figure 4 Schematic diagram of the connection relationship between the beam splitter prism block and the connecting plate in the embodiment of the present application; Figure 5 is a schematic cross-sectional view of the connecting plate along the vertical direction in an embodiment of the present application; Figure 6 It is a schematic diagram of the refraction path of the reflected light of the components in the embodiment of the present application on the beam splitter prism block and the reflector.
[0024] Description of reference numerals: 1. Detection mechanism; 2. Imaging processing mechanism; 3. Detection body; 4. Image taking lens; 5. Distance adjustment assembly; 51. Bottom plate; 52. Top cover; 53. End frame; 54. Distance adjustment screw rod; 6. First image taking light source; 61. First searchlight; 611. First light guide channel; 7. Refraction assembly; 71. Connecting plate; 711. First channel; 712. Second channel; 72. Beam splitter prism block; 721. Refraction surface; 73. Reflector; 8. Second image taking light source; 81. Second searchlight; 811. Second light guide channel; X. Image taking path. DETAILED DESCRIPTION
[0025] The embodiment of the present application discloses an alignment detection structure.
[0026] The following is combined with Figure 1-6 This application is described in further detail.
[0027] Reference Figure 1 , A collimation alignment detection structure is used to image, detect, and compare the components of a workpiece distributed in the vertical direction. Among them, the collimation alignment detection structure includes a detection mechanism 1 and an imaging processing mechanism 2. The detection mechanism 1 can image and photograph the components at both ends in the height direction of the imaging processing mechanism 2, and can detect and compare the taken photos, so as to determine whether there are surface defects on the components at both ends in the height direction of the imaging processing mechanism 2, whether they are symmetric along the vertical direction, and whether the positions and sizes on the workpiece are all the same.
[0028] Refer to Figure 2 , The detection mechanism 1 includes a detection body 3, an imaging lens 4, and a distance adjustment component 5. Among them, the distance adjustment component 5 further includes a bottom plate 51, a top cover 52, and an end frame 53. The bottom plate 51 can be a horizontal steel plate, and the top wall of the bottom plate 51 is used for installing the detection body 3 and the imaging lens 4. Among them, the detection body 3 can be a camera with an on-line photo analysis system, and the camera is also connected to an external display screen through a PLC controller, so that the operator can see the photos taken and shot by the detection body 3 at any time. The top cover 52 can be a U-shaped steel plate, the detection body 3 is fixed in the side wall of the top cover 52 by bolts, and the side wall of the top cover 52 is slidably connected to the bottom plate 51 through a chute.
[0029] Refer to Figure 2 , In this embodiment, the lens orientation direction of the detection body 3 is the imaging path X, and the imaging path X is the same as the length direction of the bottom plate 51. The imaging lens 4 can be a high-definition imaging lens 4 adapted to the detection body 3. The imaging lens 4 is fixed on the top wall of the bottom plate 51 by bolts. The imaging lens 4 is placed along the imaging path X direction, and the lens of the detection body 3 is properly fitted inside the side wall of the imaging lens 4. The operator can push the top cover 52 to move along the length direction of the bottom plate 51, so that the lens of the detection body 3 moves relative to the imaging lens 4, and then the detection body 3 can focus on and image objects at different positions on the imaging path X, so as to ensure the clarity of the images taken and photos shot by the detection body 3.
[0030] Refer to Figure 2The end frame 53 can be an L-shaped steel frame, one end of the end frame 53 overlaps with the bottom plate 51, and the other end overlaps with the top cover 52. The end frame 53 is threadedly connected with a pitch adjusting screw 54, one end of the pitch adjusting screw 54 in the length direction is always located at the side of the end frame 53 away from the top cover 52, and the other end is rotatably arranged inside the top cover 52 through a ring plate. After the operator rotates the pitch-adjusting screw rod 54 in the clockwise direction, one end of the pitch-adjusting screw rod 54 inside the top cover 52 can push the top cover 52 and the detection body 3 to move along the imaging path X direction toward the imaging lens 4; after the operator rotates the pitch-adjusting screw rod 54 in the counterclockwise direction, one end of the pitch-adjusting screw rod 54 inside the top cover 52 can carry the top cover 52 and the detection body 3 to move along the imaging path X direction away from the imaging lens 4; therefore, after the operator rotates the pitch-adjusting screw rod 54 in the clockwise or counterclockwise direction, the lens of the detection body 3 can be quickly and conveniently moved relative to the imaging lens 4, thereby completing the rapid focusing of the detection body 3.
[0031] Reference Figure 3 The imaging processing mechanism 2 is used to assist the detection body 3 to capture images of the parts distributed in the vertical direction of the workpiece. The imaging processing mechanism 2 includes a first imaging light source 6, a refractive component 7, and a second imaging light source 8, which are sequentially distributed along the vertical direction. The refractive component 7 is located on the imaging path X, and the first imaging light source 6 is located at the top thereof to assist the detection body 3 to capture images of the parts located above the refractive component 7; the second imaging light source 8 is located at the bottom of the refractive component 7, and the second imaging light source 8 is used to assist the detection body 3 to capture images of the parts located below the refractive component 7.
[0032] Reference Figure 3 and Figure 4 The refractive component 7 includes a connecting plate 71 and a beam splitter prism block 72 , wherein the connecting plate 71 can be a horizontal steel plate, which is fixed to the top wall of the bottom plate 51 by bolts to protect the imaging lens 4 and is covered on the protective block outside the imaging lens 4 .
[0033] Reference Figure 4 and Figure 5 A first channel 711 is vertically penetrated at the center of the connecting plate 71 , and a second channel 712 is also vertically penetrated on the connecting plate 71 along the imaging path X direction. The second channel 712 is connected to the first channel 711 and the two are perpendicular to each other.
[0034] Reference Figure 4 and Figure 6, the beam splitter prism block 72 can be made of K9 glass, a transparent square block with semi-transmissive and semi-reflective properties, and a refractive surface 721 coinciding with one of the docking lines is provided inside the beam splitter prism block 72. In the present embodiment, the angle between the side wall of the refractive surface 721 facing the imaging lens 4 and the horizontal plane is 45°. The outer circumference of the beam splitter prism block 72 is smaller than the inner diameter of the first channel 711. The beam splitter prism block 72 can be placed in the first channel 711 and fixed in the side wall of the first channel 711 by glue, and the beam splitter prism block 72 is located at the center of the intersection of the first channel 711 and the second channel 712. In the present embodiment, after the light enters the first channel 711 in the vertical direction from the top of the connecting plate 71, part of the light can pass through the refractive surface 721 and then irradiate the bottom of the connecting plate 71; another part of the light can be reflected along the imaging path X in the direction away from the imaging lens 4 through the refractive surface 721. After the light enters the first channel 711 along the vertical direction from the bottom of the connecting plate 71, part of the light can pass through the refractive surface 721 and then irradiate the top of the connecting plate 71; another part of the light can be reflected by the refractive surface 721 along the imaging path X toward the direction close to the imaging lens 4.
[0035] Reference Figure 3 The first imaging light source 6 includes a first searchlight 61. In this embodiment, the first searchlight 61 can be a bowl-shaped searchlight, which is fixed to the top wall of the connecting plate 71 by bolts, and the inner diameter of the first searchlight 61 decreases from the end away from the connecting plate 71 to the end close to the connecting plate 71.
[0036] Reference Figure 3 A first light guiding channel 611 is vertically penetrated on the first searchlight 61 , and the first light guiding channel 611 is connected to the first channel 711 .
[0037] Reference Figure 4 and Figure 6 The refractive component 7 also includes a reflector 73, which is placed in the side wall of the first channel 711 along the vertical direction, and the mirror surface of the reflector 73 faces the beam splitter prism block 72, and the side wall of the reflector 73 facing away from the beam splitter prism block 72 is glued to the side wall of the first channel 711 by glue.
[0038] Reference Figure 3 The second imaging light source 8 includes a second searchlight 81, which is the same as the first searchlight 61 and is symmetrically fixed to the side wall of the connecting plate 71 away from the first searchlight 61 by bolts. A second light guide channel 811 is provided through the second searchlight 81, and the second light guide channel 811 is also connected to the first channel 711.
[0039] Reference Figure 4 and Figure 6In this embodiment, the detection body 3 simultaneously captures, photographs, detects, and compares the components located above and below the connecting plate 71. After the first spotlight irradiates the components located above the connecting plate 71, the components located above the connecting plate 71 can be illuminated, and the beam splitter prism block 72 located below the components can receive the reflected light emitted by them, that is, the reflected light emitted by the illuminated components can pass through the first light guide channel 611 along the vertical direction and enter the beam splitter prism block 72; part of the reflected light passes through the refractive surface 721 and then passes through the second light guide channel 811, and another part of the reflected light is reflected by the refractive surface 721 and then refracted toward the reflector 73 along the imaging path X direction; the reflector 73 can reflect the reflected light back to the beam splitter prism block 72 again, and part of the reflected light reflected back to the beam splitter prism block 72 can pass through the refractive surface 721 and refracted toward the imaging lens 4 along the imaging path X direction, and can then be imaged and photographed by the detection body 3 with the imaging lens 4.
[0040] Reference Figure 4 and Figure 6 At the same time, the second spotlight can also illuminate the components located below the connecting plate 71. After the components located below the connecting plate 71 are illuminated, the reflected light released by them can pass through the second light guide channel 811 in the vertical direction and enter the splitter prism block 72; part of the reflected light can be refracted toward the imaging lens 4 along the imaging path X direction under the reflection action of the refractive surface 721, and then can be imaged and photographed by the detection body 3 with the imaging lens 4.
[0041] Reference Figure 3 Since the components located above the connecting plate 71 need to be reflected by the reflector 73 when the inspection body 3 takes an image, the imaging distance generated when the inspection body 3 takes an image of the components above the connecting plate 71 is greater than the imaging distance generated when the inspection body 3 takes an image of the components below the connecting plate 71. As a result, when the inspection body 3 takes images of the components above and below the connecting plate 71 at the same time, at least one of the photos may be out of focus or unclear. Therefore, in this embodiment, the height dimension of the second searchlight 81 is greater than the height dimension of the first searchlight 61, that is, the distance between the second searchlight 81 and the parts located below the connecting plate 71 is smaller than the distance between the first searchlight 61 and the parts located above the connecting plate 71. By shortening the physical distance between the second searchlight 81 and the parts below the connecting plate 71, the imaging distance of the parts located above the connecting plate 71 when the image is successfully captured by the inspection body 3 is equal to the imaging distance of the parts located below the connecting plate 71 when the image is successfully captured by the inspection body 3, thereby ensuring the imaging accuracy and shooting clarity of the inspection body 3.
[0042] The implementation principle of an alignment detection structure in an embodiment of the present application is that the detection body 3 simultaneously captures, photographs, detects, and compares the components located above and below the connecting plate 71.
[0043] After the first spotlight irradiates the components located above the connecting plate 71, the components located above the connecting plate 71 can be illuminated, and the reflected light emitted by the illuminated components can pass through the first light guide channel 611 in the vertical direction and enter the beam splitter prism block 72. Part of the reflected light is reflected by the refractive surface 721 and refracted toward the reflector 73 along the imaging path X direction. The reflector 73 can reflect the reflected light back to the beam splitter prism block 72 again, and part of the reflected light reflected back to the beam splitter prism block 72 can pass through the refractive surface 721 and refract toward the imaging lens 4 along the imaging path X direction, and then can be imaged and photographed by the detection body 3 with the imaging lens 4.
[0044] The second spotlight can also illuminate the components below the connecting plate 71. After the components below the connecting plate 71 are illuminated, the reflected light released can pass through the second light guide channel 811 in the vertical direction and enter the beam splitter prism block 72. Part of the reflected light can be refracted toward the imaging lens 4 along the imaging path X direction under the reflection effect of the refractive surface 721, and can then be imaged and photographed by the detection body 3 with the imaging lens 4.
[0045] This process uses a set of detection bodies 3 to simultaneously image, photograph, detect and compare two groups of parts distributed in the vertical direction of the workpiece, thereby reducing the number of detection bodies 3 used; and since only one set of detection bodies 3 needs to be calibrated, it helps to ensure the accuracy of the detection body 3 in detecting multiple groups of parts at the same time.
[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. An alignment detection structure, characterized in that: Used to detect surface defects of parts distributed along the vertical direction on a group of workpieces, and whether the positions and sizes on the workpieces are the same, the alignment detection structure includes: A detection mechanism (1) is used to capture images of components on a workpiece and to detect and compare the contents of the captured images; An imaging processing mechanism (2), the imaging processing mechanism (2) comprising a first imaging light source (6), a refraction component (7) and a second imaging light source (8) which are arranged in sequence along a vertical direction; Wherein, the refraction component (7) is arranged on the imaging path (X) of the detection mechanism (1); The first imaging light source (6) and the second imaging light source (8) are respectively used to illuminate components of the workpiece distributed in the vertical direction, and the components illuminated by the first imaging light source (6) and / or the second imaging light source (8) can be imaged, detected and compared by the detection mechanism (1) through the refractive component (7); The distance between the first imaging light source (6) and the nearby components is different from the distance between the second imaging light source (8) and the nearby components; the imaging distance of the components near the first imaging light source (6) reaching the detection mechanism (1) through the refractive component (7) is equal to the imaging distance of the components near the second imaging light source (8) reaching the detection mechanism (1) through the refractive component (7).
2. The alignment detection structure according to claim 1, characterized in that: The detection mechanism (1) comprises: A detection body (3) for detecting and comparing components located on the imaging path (X); An imaging lens (4) is arranged on the detection body (3) and is located on an imaging path (X), and is used to enable the detection body (3) to capture an image of a component located on the imaging path (X); The distance adjustment component (5) is used to enable the detection body (3) to move relative to the imaging lens (4) along the extension direction of the imaging path (X), so that the detection body (3) can focus on the components located on the imaging path (X).
3. The alignment detection structure according to claim 2, characterized in that: The distance adjustment component (5) comprises: A bottom plate (51) extends in a horizontal direction and is used to carry the detection body (3) and the imaging lens (4); the imaging lens (4) is fixed on the bottom plate (51); A top cover (52) is fixedly arranged on the detection body (3) and is slidably connected to the bottom plate (51) so that the detection body (3) can move relative to the imaging lens (4); An end frame (53) is arranged on the bottom plate (51); a distance-adjusting screw rod (54) is threadedly connected to the end frame (53); the distance-adjusting screw rod (54) passes through one end of the end frame (53) and is arranged in the top cover (52) and can rotate relative to the top cover (52); when the distance-adjusting screw rod (54) is threadedly rotated on the end frame (53), the distance-adjusting screw rod (54) can carry the top cover (52) and the detection body (3) to move relative to the imaging lens (4).
4. The alignment detection structure according to claim 2, characterized in that: The refraction component (7) comprises: A connecting plate (71) is arranged on the imaging path (X); two opposite sides of the connecting plate (71) in the vertical direction are respectively used for installing the first imaging light source (6) and the second imaging light source (8); A beam splitter prism block (72) capable of semi-transmitting and semi-reflecting light; a first channel (711) for installing the beam splitter prism block (72) is provided through the connecting plate (71); a refractive surface (721) of the beam splitter prism block (72) capable of semi-transmitting and semi-reflecting light is located inside the beam splitter prism block (72) and coincides with one of the diagonals of the beam splitter prism block (72); and an angle between the side wall of the refractive surface (721) facing the imaging lens (4) and a horizontal plane is 45°; A second channel (712) extending along the imaging path (X) is provided through the connecting plate (71) in a horizontal direction, and the second channel (712) is communicated with the first channel (711).
5. The alignment detection structure according to claim 4, characterized in that: The first imaging light source (6) comprises a first searchlight (61) located on the top of the connecting plate (71), and a first light guide channel (611) communicating with the first channel (711) is provided through the first searchlight (61); The refraction component (7) further comprises a reflector (73), wherein the reflector (73) is located on a side of the beam splitting prism block (72) away from the imaging lens (4), and the reflector (73) is located on an imaging path (X); After a component close to the first searchlight (61) is illuminated by the first searchlight (61), its reflected light passes through the first light guide channel (611) in a vertical direction and can be reflected toward the reflector (73) along an imaging path (X) through the refractive surface (721). The reflector (73) can reflect the reflected light again and allow the reflected light to pass through the refractive surface (721) along the imaging path (X) before being imaged by the detection body (3).
6. The alignment detection structure according to claim 5, characterized in that: The second imaging light source (8) comprises a second searchlight (81) located at the bottom of the connecting plate (71), and a second light guide channel (811) communicating with the first channel (711) is provided through the second searchlight (81); After a component close to the second searchlight (81) is illuminated by the second searchlight (81), its reflected light passes through the second light channel in a vertical direction and can be reflected along the imaging path (X) through the refractive surface (721) toward the detection body (3), thereby being imaged by the detection body (3).
7. The alignment detection structure according to claim 6, characterized in that: The distance between the first searchlight (61) and the adjacent components is greater than the distance between the second searchlight (81) and the adjacent components.
8. The alignment detection structure according to claim 7, characterized in that: The first searchlight (61) and the second searchlight (81) are both bowl-shaped searchlights, and the height dimension of the second searchlight (81) is greater than the height dimension of the first searchlight (61).