Optical detection equipment

Abstract

The utility model discloses optical detection equipment which comprises a conveying device used for conveying a to-be-detected piece; the detection device comprises a first detection device arranged above the conveying device and a second detection device arranged below the conveying device, and the second detection device comprises a lens, a camera arranged at one end of the lens and a projection assembly arranged on the side of the other end of the lens; the second detection device is used for acquiring height data of the lower surface of the to-be-detected piece and a second image of the lower surface of the to-be-detected piece, and the first detection device is used for acquiring a first image of the upper surface of the to-be-detected piece; and the controller is used for performing defect detection on the to-be-detected piece according to the height data, the first image and the second image. The detection devices are arranged above and below the conveying device, so that the upper and lower surfaces of the to-be-detected piece can be detected at the same time, and for the to-be-detected piece of which the front and back sides need to be detected, the detection time can be shortened and the efficiency can be improved by detecting the front and back sides at the same time.

Description

Technical Field

[0001] The present application relates to the field of automated testing equipment, and in particular to an optical testing equipment. Background Art

[0002] AOI (Automated Optical Inspection) is a technology used to detect and inspect defects and problems in printed circuit boards (PCBs), electronic components, and other manufacturing processes. It uses optical systems and image processing technology to automatically scan and analyze the appearance of products to find possible defects, errors, or problems.

[0003] Although the detection efficiency and accuracy of the AOI system in the existing technology have been greatly improved compared with manual detection, it is still difficult to meet the usage scenarios with higher requirements. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide an optical detection device that can improve detection efficiency and detection accuracy and improve work efficiency.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] An optical detection device is provided, comprising:

[0007] A conveying device, used for conveying the piece to be tested;

[0008] A detection device, comprising a first detection device arranged above the conveying device and a second detection device arranged below the conveying device, wherein the second detection device comprises: a lens, a camera arranged at one end of the lens and a projection component arranged on the side of the other end of the lens, the second detection device is used to obtain height data of the lower surface of the workpiece to be tested and a second image of the lower surface of the workpiece to be tested, and the first detection device is used to obtain a first image of the upper surface of the workpiece to be tested;

[0009] A controller is used to perform defect detection on the test piece according to the height data and the first image and the second image.

[0010] Optionally, the controller is communicatively connected to the detection device, and is also used to control the first detection device and the second detection device to simultaneously acquire the first image and the second image.

[0011] Optionally, the first detection device is also used to obtain height data of the upper surface of the test piece, and the first detection device includes: a lens, a camera arranged at one end of the lens, and at least two projection components arranged on the side of the other end of the lens.

[0012] Optionally, the conveying device includes a product conveying track, on which a plurality of limit assemblies are arranged, and the limit assemblies are configured to be telescopic relative to the product conveying track. When the limit assemblies are retracted into the interior of the product conveying track, the products can move along the conveying direction of the product conveying track. When the limit assemblies are extended to protrude from the product conveying track, they hinder the products from staying in a fixed position on the product conveying track.

[0013] Optionally, the product conveying track includes a driving track and a driven track which are parallel to each other. The product is mounted between the driving track and the driven track and can move under the drive of the driving track.

[0014] Optionally, a plurality of active rollers are arranged on the active track, a plurality of driven rollers are arranged on the driven track, the axial directions of the active rollers and the driven rollers are perpendicular to the conveying direction of the product, and the limiting components are arranged at intervals along the conveying direction of the product.

[0015] Optionally, the limiting assembly is arranged on the active track and / or the driven track.

[0016] Optionally, the active track is fixedly arranged, and the driven track is movably arranged relative to the active track, so that the distance between the active track and the driven track is adjustable.

[0017] Optionally, the limit assembly includes a limit block and a limit drive device for driving the limit block to extend and retract; the limit drive device is a linear motor, and the limit block is arranged at the power output end of the linear motor.

[0018] Optionally, a position sensor is also included, which is used to detect the product position and send the product position information to the controller to provide a basis for controlling the detection and transportation of the product.

[0019] The beneficial effects of the present application are as follows: the present application can realize simultaneous detection of the upper and lower surfaces of the test piece by setting detection devices both above and below the conveying device. For the test piece that needs to be detected on both the front and back sides, simultaneous detection of the front and back sides can shorten the detection time and improve efficiency. At the same time, on the basis of standard SMT and DIP2D AOI, the quality control of plug-in components after passing through the furnace, such as excessively long pins and poor solder beads, can be achieved, which can solve the pursuit of high quality for some high-end products. At the same time, there is no need to set a turning device for turning over the test piece, which reduces the complexity of the equipment.

[0020] The second detection device can simultaneously obtain the height data of the lower surface of the test piece and the second image, that is, it realizes the 3D optical detection function, so it can obtain richer three-dimensional information, thereby realizing more accurate and comprehensive defect detection. It can achieve a wider detection coverage, scan components from multiple angles, and cover all three-dimensional spaces. Optical detection based on three-dimensional images is more accurate and can detect more defects in three-dimensional shapes such as misalignment, deformation, and warping. At the same time, the image obtained by 3D optical detection is better, and the generated three-dimensional view is more intuitive, which helps to quickly locate and identify defects.

[0021] In this solution, the position of the product on the conveying device is controlled by setting a limit component to prevent the product from continuing to move under the action of inertia after the conveying device stops conveying the product, thereby preventing the product from continuing to move under the action of inertia and affecting its position accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present application is further described in detail below based on the drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the optical detection device described in an embodiment of the present application.

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the optical detection device in an exploded state according to an embodiment of the present application.

[0025] Figure 3 This is a schematic diagram of the assembly status of the conveying device, the first detection device and the second detection device described in an embodiment of the present application.

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the second detection device and its driving mechanism in an embodiment of the present application.

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the conveying device described in the embodiment of the present application.

[0028] Figure 6 for Figure 5 A partial enlarged view of point I in the middle.

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the first detection device and its driving mechanism in an embodiment of the present application.

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the second detection device in an embodiment of the present application.

[0031] In the figure:

[0032] 100, housing assembly; 110, bottom frame; 120, display; 130, display stand; 140, keyboard; 150, mouse;

[0033] 200, conveying device; 210, active track; 220, driven track; 221, driven roller; 230, groove; 240, limit assembly; 250, position sensor; 260, motor; 270, lead screw; 280, guide shaft;

[0034] 310, first detection device; 311, 2D imaging assembly; 312, first upper linear guide rail; 313, second upper linear guide rail;

[0035] 320, second detection device; 321, 3D imaging assembly; 322, lower vertical guide rail; 323, lower first linear guide rail; 324, lower second linear guide rail;

[0036] 400, electric cabinet;

[0037] 500, drag chain;

[0038] 600, imaging system; 610, lens; 620, camera; 700, projection component. DETAILED DESCRIPTION

[0039] In order to make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0040] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] AOI (Automated Optical Inspection) is a technology used to detect and inspect defects and problems in printed circuit boards (PCBs), electronic components, and other manufacturing processes. It uses optical systems and image processing technology to automatically scan and analyze the appearance of products to find possible defects, errors, or problems.

[0043] AOI systems use cameras, lighting systems and lenses to capture images of various parts of the product for comprehensive inspection. The acquired images are analyzed and processed by image processing software to highlight possible soldering problems, component position deviations, pin breakage, short circuits, open circuits, missing passive components, poor printing, etc. AOI systems usually compare detected problems with predetermined standards or templates and classify the problems into the type and degree of defects or problems for subsequent processing.

[0044] However, how to improve the detection efficiency and quality of the AOI system is an important development direction of the current AOI system.

[0045] Reference Figure 1-8 As shown, an embodiment of the present application provides an optical inspection device, including: a conveying device 200, used to convey a workpiece to be tested; a detection device, including a first detection device 310 arranged above the conveying device 200 and a second detection device 320 arranged below the conveying device 200, the second detection device 320 including: a lens 610, a camera 620 arranged at one end of the lens 610 and a projection component 700 arranged on the side of the other end of the lens 610, the second detection device 320 is used to obtain height data of the lower surface of the workpiece to be tested and a second image of the lower surface of the workpiece to be tested, and the first detection device 310 is used to obtain a first image of the upper surface of the workpiece to be tested;

[0046] A controller is used to perform defect detection on the test piece according to the height data and the first image and the second image.

[0047] This application can detect the upper and lower surfaces of the test piece at the same time by setting up detection devices above and below the conveying device 200. For the test piece that needs to be detected on both the front and back sides, detecting the front and back sides at the same time can shorten the detection time and improve efficiency. At the same time, on the basis of standard SMT (surface mount technology) and DIP2D AOI (binocular vision two-dimensional automatic optical inspection), the quality control of plug-in components after passing through the furnace, such as excessively long pins and poor solder beads, can solve the pursuit of high quality for some high-end products. At the same time, there is no need to set up a flipping device for turning over the test piece, which reduces the complexity of the equipment.

[0048] The second detection device 320 can simultaneously obtain the height data of the lower surface of the test piece and the second image, that is, it realizes the 3D optical detection function, so it can obtain richer three-dimensional information, thereby realizing more accurate and comprehensive defect detection. It can achieve a wider detection coverage, scan components from multiple angles, and cover all three-dimensional spaces. The optical detection based on three-dimensional images is more accurate and can detect more defects in three-dimensional shapes such as misalignment, deformation, and warping. At the same time, the image obtained by 3D optical detection is better, and the generated three-dimensional view is more intuitive, which helps to quickly locate and identify defects.

[0049] It is understandable that the specific structure of the second detection device 320 for realizing the 3D detection function can be various. For example, in an optional embodiment of the present application, a technical solution of a central imaging system 600 and four side projection components 700 can be adopted. Figure 8 As shown, the imaging system 600 of the second detection device 320 includes a lens 610, and the lens 610 has a first end facing the object to be tested and a second end away from the object to be tested. A camera 620 is arranged at the second end of the lens 610, and four projection components 700 are arranged on the side of the first end of the lens 610 along the circumferential direction of the lens 620. The optical axis of the projection component 700 and the optical axis of the lens 610 are arranged to be inclined to each other. A series of structured light stripes are formed on the object to be tested through the four projection components 700. The camera 620 collects the stripe pattern through the lens 610, and solves the three-dimensional contour of the object to be tested through an algorithm, thereby completing the test.

[0050] It should be pointed out that the number of projection components 700 being 4 is not a limitation to the present solution. In other embodiments, other numbers of projection components 700 may be provided as required. In order to realize the 3D optical detection function, the number of projection components 700 may be 2 or more.

[0051] In addition, in other embodiments of the present application, the second detection device 320 can also adopt a solution of a single central projection component 700 and four side imaging systems 600. Specifically, in the present embodiment, four imaging systems 600 are arranged in the circumferential direction of the projection component 700 of the second detection device 320. Each of the imaging systems 600 includes a 3D camera and a 3D lens. The optical axis of the 3D lens and the optical axis of the lens of the projection component 700 are arranged at an angle to each other. The projection component 700 forms structured light stripes on the object to be tested, and the stripe patterns are then collected at different orientations by the imaging system 600. Finally, the three-dimensional contour of the object to be tested is solved by an algorithm to complete the test.

[0052] In the present application, the controller may be a computer, a microcontroller or other types of controllers.

[0053] Furthermore, the function of the controller in the embodiment of the present application is not limited to processing the information collected by the detection device. The controller is communicatively connected to the detection device and can also be used to control the first detection device and the second detection device to simultaneously acquire the first image and the second image.

[0054] In the present application, the first detection device 310 and the second detection device 320 respectively perform optical detection on the test piece from above and below. The specific detection scheme can be that the first detection device 310 is a 2D optical detection device and the second detection device 320 is a 3D optical detection device, or both the first detection device 310 and the second detection device 320 are 3D optical detection devices, that is, the first detection device 310 is also used to obtain the height data of the upper surface of the test piece. The first detection device 310 includes: a lens 610, a camera 620 disposed at one end of the lens 610, and at least two projection components 700 disposed on the side of the other end of the lens 610.

[0055] Specifically, the lens 610 has a first end facing the object to be tested and a second end away from the object to be tested. The second end of the lens 610 is provided with a camera 620. Four projection components 700 are arranged on the side of the first end of the lens 610 along the circumferential direction of the lens 610. The optical axes of the four projection components 700 and the optical axis of the lens 610 are arranged to be inclined to each other. A series of structured light stripes are respectively formed on the object to be tested through the four projection components 700. The camera 620 collects the stripe pattern through the lens 610, and solves the three-dimensional contour of the object to be tested through an algorithm, thereby completing the test.

[0056] Reference Figure 1-7As shown, the conveying device 200 in this embodiment includes a product conveying track, and a plurality of limit assemblies 240 are arranged on the product conveying track. The limit assemblies 240 are configured to be retractable relative to the product conveying track. When the limit assemblies 240 are retracted to the inside of the product conveying track, the product can move along the conveying direction of the product conveying track. When the limit assemblies 240 are extended to protrude from the product conveying track, they hinder the product from staying in a fixed position on the product conveying track.

[0057] In this solution, the position of the product on the conveying device 200 is controlled by setting a limit assembly 240 to prevent the product from continuing to move under the action of inertia after the conveying device 200 stops conveying the product, thereby preventing the product from continuing to move under the action of inertia and affecting its position accuracy.

[0058] Specifically, in the optical inspection equipment, the conveying device 200 usually does not clamp the product, and only drives the product to move by friction to transport the product to the inspection position. In this process, in order to improve the product transportation efficiency, the conveying device 200 usually needs to have a higher conveying speed. The faster the product conveying speed, the greater the distance the product continues to move under the influence of inertia when the active conveying suddenly stops. Therefore, there is a contradiction between transporting products at high speed and accurately transporting products to the inspection position, and the deviation between the product stop position and the inspection position will have an adverse effect on the accuracy of product inspection. In this application, by setting a limit component 240 to block the product, the high-speed moving product can be quickly stopped at the predetermined position, which further improves the accuracy of the product stop position while ensuring high-speed transportation.

[0059] Reference Figure 1-2 As shown, the optical inspection device described in the embodiment of the present application includes a shell assembly 100, a bottom frame 110 arranged inside the shell assembly 100, the conveying device 200 is arranged on the bottom frame 110, and the product conveying track includes an active track 210 and a driven track 220 parallel to each other. The product is mounted between the active track 210 and the driven track 220 and can move under the drive of the active track 210.

[0060] It is understandable that the optical inspection device described in the present application can be used to detect and inspect defects in printed circuit boards (PCBs), electronic components, and other manufacturing processes. However, the above examples are not intended to limit the present solution. In other embodiments, it can also be used to detect other products. In this embodiment, the use of PCB inspection is used as an example for illustration. During operation, the PCB moves along the product conveying track to the inspection position and then stops moving. At the inspection position, the position of the PCB to be inspected is exposed outside the product conveying track so as to be inspected by the inspection device.

[0061] Reference Figure 5-6 As shown, in the present application, a plurality of active rollers are arranged on the active track 210, a plurality of driven rollers 221 are arranged on the driven track 220, the axial direction of the active rollers and the driven rollers 221 are perpendicular to the conveying direction of the product, and the limiting components 240 are arranged at intervals along the conveying direction of the product.

[0062] The active rollers are driven by the roller driving device to rotate synchronously. The sides of the active track 210 and the driven track 220 are both provided with limiting wheels with grooves 230. When a PCB is provided in the product conveying track, the end of the PCB is located in the groove 230. During the rotation of the active roller, the PCB is driven to move by friction, and the driven roller 221 is driven by the PCB to rotate at the other end. The active roller and the driven roller 221 support the PCB, and the groove 230 limits the PCB.

[0063] In the present application, in order to ensure the accuracy of the limiting component 240 in limiting the PCB and the versatility of the limiting function, the limiting component 240 is arranged on the active track 210 .

[0064] It should be pointed out that the above-mentioned setting of the limit component 240 on the active track 210 does not serve as a limitation to the present application. In other embodiments, the limit component 240 can be set on the driven track 220, or the limit component 240 can be set on both the active track 210 and the driven track 220. When the limit component 240 is set on both the active track 210 and the driven track 220, the limit components 240 on the active track 210 and the driven track 220 can be set one by one, or staggered with each other.

[0065] In the case where the limiting components 240 on the active track 210 and the driven track 220 are arranged in a one-to-one correspondence, when it is necessary to limit the PCB in the product conveying track, the limiting components 240 on the active track 210 and the driven track 220 can be started at the same time, so that both ends of the PCB are blocked at the same time, the force on the PCB is more even, and the accuracy and stability of its staying position are better; it is also possible to only start the limiting components 240 on the active track 210 or the driven track 220 to limit the PCB.

[0066] When the limiting components 240 on the active track 210 and the driven track 220 are arranged in an alternating manner, the limiting components 240 on the active track 210 and the driven track 220 can respectively correspond to PCBs of different specifications. According to the specifications of the PCB, the corresponding limiting components 240 are activated to limit the PCB so that it can accurately stay in the preset position.

[0067] It is understandable that, when the limiting assembly 240 is only provided on the active track 210 or only provided on the driven track 220, the corresponding limiting assembly 240 can be controlled to extend to block and limit the PCB as required, so as to adapt to different PCB specifications.

[0068] Reference Figure 6 As shown, the limit assembly 240 described in the present application is arranged at the gap between two adjacent active rollers or two adjacent driven rollers 221. In the non-limiting state, the limit assembly 240 shrinks into the corresponding track and cannot contact the PCB. When limiting is required, the limit assembly 240 extends to the path of the PCB movement to block and limit the PCB. Usually, the extension of the limit assembly 240 is synchronized with the stopping of the active roller, or the limit assembly 240 is first controlled to extend and then the active roller continues to rotate to drive the PCB forward, until the PCB abuts against the limit assembly 240, and then the active roller stops rotating. It can be understood that the acting force between the active roller and the driven roller 221 and the PCB in the present application is the friction force generated by the gravity of the PCB rather than the friction force generated by the rotating roller and the driven roller 221 clamping the PCB. Therefore, when the PCB is blocked and stops moving, the active roller can still continue to rotate without getting stuck.

[0069] Specifically, the limit assembly 240 includes a limit block and a limit drive device for driving the limit block to extend and retract. The limit drive device is a linear motor 260 , and the limit block is arranged at the power output end of the linear motor 260 .

[0070] It is understandable that the structure of the above-mentioned limit assembly 240 does not serve as a limitation to the present application. Those skilled in the art may reasonably select the structural composition of the limit assembly 240 according to actual conditions so that it can achieve the limit function required by the present application.

[0071] Furthermore, when the specifications of the PCB change, its dimensions will usually change in both the length and width directions. By setting the limit assembly 240 at different positions and using it as needed, the problem of dimension changes in one direction (length or width) of the PCB can be solved. However, the dimension changes in the other direction make the device unable to adapt. Therefore, this embodiment provides a technical solution in which the distance between the active track 210 and the driven track 220 can be adjusted.

[0072] Specifically, refer to Figure 5 As shown, the active track 210 is fixedly arranged, and the driven track 220 is movably arranged relative to the active track 210, so that the distance between the active track 210 and the driven track 220 is adjustable.

[0073] The active track 210 is fixedly mounted on the bottom frame 110, and the driven track 220 is movably connected to the bottom frame 110 through the lead screw 270. When the motor 260 drives the lead screw 270 to rotate, the driven track 220 can move along the lead screw 270 in a direction close to or away from the active track 210. Furthermore, in this embodiment, a guide shaft 280 is provided parallel to the lead screw 270, and the driven track 220 is slidably mounted on the guide shaft 280, and the guide shaft 280 is fixedly connected to the bottom frame 110.

[0074] For further information, please refer to Figure 5 As shown, the optical inspection device described in the embodiment of the present application further includes a position sensor 250, which is used to detect the product position and send the product position information to the controller to provide a basis for controlling the inspection and transportation of the product.

[0075] Specifically, the working process of the conveying device 200 described in the embodiment of the present application is as follows: first, the movement of the driven rail 220 is controlled according to the product specifications, so that the distance between the active rail 210 and the driven rail 220 is suitable for installing the PCB to be detected, and then the PCB to be detected is placed in the conveying device 200, and the active roller is controlled to rotate so as to drive the PCB to move. The position sensor 250 is used to detect the position of the PCB. When it is detected that the PCB moves to the specified position, the limit assembly 240 is controlled to extend to block the PCB to limit its position, and the rotation of the active roller is stopped.

[0076] In order to further improve the detection efficiency, in the embodiment of the present application, when the first PCB is moved to the detection position for detection, the next PCB can be conveyed into the conveying device 200 and stay at a preset position on the product conveying track. When the detection of the previous PCB is completed, the next PCB enters the detection position for detection.

[0077] It should be pointed out that the moving direction of the PCB is not restricted in the present application, and the PCB can be loaded on both sides of the conveying device 200.

[0078] In the embodiment of the present application, there are a plurality of position sensors 250 , and the plurality of position sensors 250 are respectively disposed on the active track 210 and the driven track 220 .

[0079] The following takes the first detection device 310 as a 2D optical detection device and the second detection device 320 as a 3D optical detection device as an example to describe the moving structures of the first detection device 310 and the second detection device 320 in the present application. Figure 4As shown, in this embodiment, the second detection device 320 includes a 3D imaging component 321, which is installed on the lower vertical guide rail 322, and can move up and down along the lower vertical guide rail 322 in the Z-axis direction; the lower vertical guide rail 322 is movably installed on the lower first linear guide rail 323, and can move left and right in the X-axis direction along the lower first linear guide rail 323; the lower first linear guide rail 323 is installed on the lower second linear guide rail 324, and can move forward and backward in the Y-axis direction along the lower first linear guide rail 323, thereby realizing three-dimensional movement detection of the 3D imaging component 321.

[0080] Reference Figure 7 As shown, in this embodiment, the first detection device 310 includes a 2D imaging component 311, which is installed on the upper first linear guide 312 and can move left and right along the upper first linear guide 312 in the X-axis direction; the upper first linear guide 312 is installed on the upper second linear guide 313 through a profile gantry, and is driven by the lead screw 270 to move forward and backward along the second linear guide in the Y-axis direction, thereby realizing the planar movement detection of the 2D imaging component 311.

[0081] In this embodiment, the movement of each moving part is driven by a motor 260, and relative movement is achieved through guide rail guidance and screw transmission, which is a conventional technical means in the field, and those skilled in the art can make reasonable choices according to actual needs. In this embodiment, a drag chain 500 is also provided to store wires to prevent the wires from being pulled by high-speed movement.

[0082] The above two parts constitute the upper and lower detection mechanisms of the optical detection equipment. The two detection mechanisms can move simultaneously without interfering with each other, and can realize simultaneous detection and output the detection conditions of the front and back sides of the board respectively, greatly improving the detection efficiency.

[0083] Continue to refer to Figure 1 As shown, the optical detection device in the embodiment of the present application also includes a display 120, a keyboard 140 and a mouse 150. The display 120, the keyboard 140 and the mouse 150 are installed on the outside of the shell component 100 through a display bracket 130 arranged on the shell component 100. An electric cabinet 400 is also arranged on the rear side of the shell component 100, and electrical components for the optical detection device are arranged in the electric cabinet 400.

[0084] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., and other directions or positional relationships are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of this application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0085] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0086] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0087] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the scope of protection of the present application in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the present application without creative work, and these methods will fall within the scope of protection of the present application.

Claims

1. An optical detection device, characterized in that: include: A conveying device (200) for conveying a test piece; A detection device, comprising a first detection device arranged above the conveying device (200) and a second detection device (320) arranged below the conveying device (200), wherein the second detection device (320) comprises: a lens (610), a camera (620) arranged at one end of the lens (610), and a projection assembly (700) arranged on the side of the other end of the lens (610), the second detection device (320) being used to obtain height data of the lower surface of the test piece and a second image of the lower surface of the test piece, and the first detection device (310) being used to obtain a first image of the upper surface of the test piece; A controller is used to perform defect detection on the test piece according to the height data and the first image and the second image.

2. The optical detection device according to claim 1, characterized in that: The controller is communicatively connected to the detection device, and is also used to control the first detection device (310) and the second detection device (320) to simultaneously acquire the first image and the second image.

3. The optical detection device according to claim 1, characterized in that: The first detection device (310) is also used to obtain height data of the upper surface of the test piece, and the first detection device (310) comprises: a lens (610), a camera (620) arranged at one end of the lens (610), and at least two projection components (700) arranged on the side of the other end of the lens (610).

4. The optical detection device according to claim 1, characterized in that: The conveying device (200) comprises a product conveying track, on which a plurality of limit assemblies (240) are arranged, and the limit assemblies (240) are arranged to be telescopically arranged relative to the product conveying track. When the limit assemblies (240) are retracted into the interior of the product conveying track, the product can move along the conveying direction of the product conveying track. When the limit assemblies (240) are extended to protrude from the product conveying track, they block the product and make it stay at a fixed position on the product conveying track.

5. The optical detection device according to claim 4, characterized in that: The product conveying track comprises a driving track (210) and a driven track (220) which are parallel to each other. The product is mounted between the driving track (210) and the driven track (220) and can move under the drive of the driving track (210).

6. The optical detection device according to claim 5, characterized in that: The active track (210) is provided with a plurality of active rollers, the driven track (220) is provided with a plurality of driven rollers (221), the axial directions of the active rollers and the driven rollers (221) are perpendicular to the conveying direction of the product, and the limiting components (240) are arranged at intervals along the conveying direction of the product.

7. The optical detection device according to claim 5 is characterized in that: The limiting assembly (240) is arranged on the active track (210) and / or the driven track (220).

8. The optical detection device according to claim 5, characterized in that: The active track (210) is fixedly arranged, and the driven track (220) is movably arranged relative to the active track (210), so that the distance between the active track (210) and the driven track (220) is adjustable.

9. The optical detection device according to any one of claims 5 to 8, characterized in that: The limit assembly (240) comprises a limit block and a limit drive device for driving the limit block to extend and retract; the limit drive device is a linear motor (260), and the limit block is arranged at the power output end of the linear motor (260).

10. The optical detection device according to claim 5, characterized in that: It also includes a position sensor (250), which is used to detect the position of the product and send the product position information to the controller to provide a basis for controlling the detection and transportation of the product.

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