Vacuum cup surface defect automatic detection equipment

Abstract

The utility model discloses a vacuum cup surface defect automatic detection device, relates to the surface defect detection technical field, mainly includes frame, jig, detection subassembly and control device, said jig is provided on said frame and is used for fixing the vacuum cup to be detected, it is provided with a plurality of sets of detection subassembly, and control device is provided for the control device. The multiple groups of detection assemblies can be arranged around the vacuum cup to be detected so as to collect images of different positions of the vacuum cup to be detected, and the detection assemblies are in signal connection with the control device and can transmit the collected image data to the control device. The workpiece surface defect detection device can realize automatic detection of workpiece surface defects, and is high in detection efficiency and good in detection effect.

Description

Technical Field

[0001] The utility model relates to the technical field of surface defect detection, in particular to automatic detection equipment for surface defects of a thermos cup. Background Art

[0002] As a portable drinking water tool widely used in life, thermos cups have complex appearance and high surface quality requirements. During the production process, scratches, color difference, pits, convex spots and other defects may appear on the surface of thermos cups, which not only affect the appearance of the product, but also may affect the safety of use. At present, the detection of surface defects of thermos cups is still mainly based on manual visual inspection, which is inefficient, costly and has a high missed detection rate.

[0003] Therefore, an automatic detection device for surface defects of a thermos cup is provided to solve the above-mentioned problems existing in the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic detection device for surface defects of a thermos cup to solve the problems existing in the above-mentioned prior art, and can realize automatic detection of surface defects of workpieces with high detection efficiency and good detection effect.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides an automatic detection device for the surface defects of a thermos cup, comprising a frame, a fixture, a detection component and a control device, wherein the fixture is arranged on the frame and is used to fix the thermos cup to be detected, the detection component is provided with multiple groups, and the multiple groups of the detection components can be arranged around the thermos cup to be detected to collect images of different positions of the thermos cup to be detected, and the detection component is connected with the control device by signal and can transmit the collected image data to the control device, and the control device can detect the surface of the thermos cup to be detected according to the image data.

[0007] Preferably, the frame includes a base and an upper shell, a working platform is provided on the top of the base, the jig and the detection component are both provided on the working platform, and the upper shell surrounds the jig and the detection component.

[0008] Preferably, the jig is cylindrical, the thermos cup to be tested can be turned upside down on the jig, and the mouth of the thermos cup to be tested is embedded in the jig.

[0009] Preferably, it also includes a driving device, which can drive the fixture to rotate around its axis;

[0010] The driving device includes a servo motor and a reducer, the reducer is fixed on the working platform, and the output shaft of the reducer is fixedly connected to the fixture, the servo motor is arranged below the working platform, and the output shaft of the servo motor is connected to the reducer through a coupling;

[0011] An involute elastic friction plate is also provided above the jig. When the thermos cup to be tested is placed on the jig, the involute elastic friction plate can be deformed, so that the jig can drive the thermos cup to be tested to rotate.

[0012] Preferably, the detection components are provided with six groups, including a first detection component, a second detection component, a third detection component, a fourth detection component, a fifth detection component and a sixth detection component; wherein, the first detection component is used to capture the image of the bottom of the thermos cup to be detected, the second detection component is used to capture the image of the bottom transition surface of the thermos cup to be detected, the third detection component and the sixth detection component are used to capture the image of the lower side surface of the thermos cup to be detected, and the fourth detection component and the fifth detection component are used to capture the image of the upper side surface of the thermos cup to be detected.

[0013] Preferably, the first detection component includes a first camera, a first detection light source, a cantilever connecting bracket, a camera connecting piece, a ring light bracket and a first support frame, the first support frame is connected to the working platform and is perpendicular to the working platform, the cantilever connecting bracket is connected to the top of the first support frame, and the cantilever connecting bracket is parallel to the working platform, the first camera is connected to the cantilever connecting bracket through a camera connecting piece, the top of the ring light bracket is connected to the cantilever connecting bracket, and the bottom is connected to the first detection light source; wherein, the first detection light source is a circular ring light source, and is located above the thermos cup to be detected, the first camera is located above the ring light bracket, the first detection light source is coaxially arranged with the first camera, and the optical axis of the first camera is perpendicular to the working platform, and the first camera can capture an image of the bottom of the thermos cup to be detected;

[0014] Wherein, the first support frame is a dovetail groove support.

[0015] Preferably, the second detection component includes a camera connecting bracket and a second camera, the second camera is connected to the cantilever connecting bracket via the camera connecting bracket, the second camera is located above the thermos cup to be detected, and the optical axis of the second camera is tilted downward toward the thermos cup to be detected, and the second camera is used to capture the image of the bottom transition surface of the thermos cup to be detected.

[0016] Preferably, the third detection component includes a third camera, a second detection light source, a first light source connecting bracket and a second light source connecting bracket, wherein the second detection light source is an arc light source and adopts a bright field illumination mode, two sides of the arc light source are respectively connected to the first light source connecting bracket and the second light source connecting bracket, and the first light source connecting bracket and the second light source connecting bracket are connected to the working platform and are perpendicular to the working platform;

[0017] The third camera is connected to the first support frame through a camera connector, the optical axis of the third camera is parallel to the working platform and is aligned with the central axis of the thermos cup to be detected, a first through hole is provided on the arc light source, the first through hole is correspondingly provided to the third camera, and the third camera can collect an image of the lower side of the thermos cup to be detected through the first through hole;

[0018] The fourth detection component includes a fourth camera, which is connected to the first support frame through a camera connector, and the fourth camera is located below the third camera; the optical axis of the fourth camera is parallel to the working platform and aligned with the central axis of the thermos cup to be detected, and a second through hole is provided on the arc light source, and the second through hole is arranged corresponding to the fourth camera, and the fourth camera can capture the image of the upper side of the thermos cup to be detected through the second through hole.

[0019] Preferably, the fifth detection component comprises a fifth camera, a third detection light source, a fourth detection light source, a second support frame and a first light source support, the fifth camera is connected to the second support frame via a camera connecting plate, wherein the second support frame is a dovetail groove support, and the optical axis of the fifth camera can be aligned with the upper side of the thermos cup to be detected to collect an image of the upper side of the thermos cup to be detected;

[0020] The third detection light source and the fourth detection light source are both connected to a first light source connecting plate via a light source side connecting plate, the two first light source connecting plates are respectively connected to the top and bottom of the first light source bracket, and the light source side connecting plate is hinged to the corresponding first light source connecting plate to adjust the angle between the optical axis of the third detection light source and the fourth detection light source and the central axis of the thermos cup to be detected, and the third detection light source and the fourth detection light source are used to provide dark field illumination.

[0021] Preferably, the sixth detection component includes a sixth camera, a fifth detection light source, a third support frame and a second light source support frame, the sixth camera is connected to the third support frame through a camera connecting plate, wherein the third support frame is a dovetail groove support, and the optical axis of the sixth camera can be aligned with the lower side of the thermos cup to be detected to collect an image of the lower side of the thermos cup to be detected;

[0022] The fifth detection light source is connected to the second light source connecting plate through a light source side connecting plate, the second light source connecting plate is connected to the top of the second light source bracket, the light source side connecting plate is hinged to the second light source connecting plate to adjust the angle between the optical axis of the fifth detection light source and the central axis of the thermos cup to be detected, and the fifth detection light source is used to provide dark field illumination.

[0023] Compared with the prior art, the utility model has achieved the following technical effects:

[0024] The utility model is provided with a plurality of detection components, which can perform all-round image acquisition on the surface of the thermos cup to be inspected, obtain high-quality surface images, and then identify and process the acquired images through a control device to detect surface defects. The utility model can realize automatic detection of surface defects of workpieces, has a high degree of automation, high detection efficiency and good detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a schematic diagram of the structure of the automatic detection device for the surface defects of a thermos cup in an embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the automatic detection device for surface defects of thermos cups in the embodiment of the utility model after removing the upper shell;

[0028] Figure 3 for Figure 2 A partial enlarged schematic diagram of the automatic detection equipment for the surface defects of the medium-sized thermos cup;

[0029] Figure 4 It is a three-dimensional structural diagram of the involute elastic friction plate in the embodiment of the utility model;

[0030] Figure 5 It is a top view of the involute elastic friction plate in the embodiment of the utility model.

[0031] In the figure: 1-frame, 2-working platform, 3-planetary reducer, 5-jig, 6-camera connecting piece, 7-third supporting frame, 8-cantilever connecting bracket, 11-second supporting frame, 12-first supporting frame, 13-first detection light source, 15-camera connecting bracket, 16-ring light bracket, 18-light source side connecting plate, 19-first light source bracket, 20-first light source connecting bracket, 21-second light source connecting bracket, 22-second light source bracket, 23-second light source connecting plate, 27-first light source connecting plate, 30-second detection light source, 35-industrial computer, 36-electric control mounting plate, 41-first camera, 42-second camera, 43-third camera, 44-fourth camera, 45-fifth camera, 46-sixth camera, 53-third detection light source, 54-fourth detection light source, 55-fifth detection light source, 61-display, 62-control panel. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] The utility model aims to provide an automatic detection device for surface defects of a thermos cup to solve the problems existing in the prior art and can realize automatic detection of surface defects of a workpiece with high detection efficiency and good detection effect.

[0034] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] Embodiment 1

[0036] like Figure 1-Figure 5 As shown, in this embodiment, an automatic detection device for surface defects of a thermos cup is provided, which mainly includes a frame 1, a fixture 5, a detection component and a control device. The fixture 5 is arranged on the frame 1, and is used to fix the thermos cup to be detected. The detection component is provided with multiple groups, and the multiple groups of the detection components can be arranged around the thermos cup to be detected to collect images of different positions of the thermos cup to be detected, and the detection component is connected to the control device by signal, and can transmit the collected image data to the control device, and the control device can detect the surface of the thermos cup to be detected according to the image data.

[0037] In the present embodiment, a plurality of detection components are provided, which can perform all-round image acquisition on the surface of the thermos cup to be inspected, obtain high-quality surface images, and then recognize and process the obtained images through the control device to detect surface defects. This can realize automatic detection of surface defects of the thermos cup workpiece to be inspected, with a high degree of automation, high detection efficiency and good detection effect.

[0038] In this embodiment, the frame 1 mainly includes a base and an upper shell. A working platform 2 is arranged on the top of the base. The fixture 5 and the detection component are arranged on the working platform 2. The working platform 2 is provided with a plurality of mounting holes, mounting grooves and threaded mounting holes, etc., for installing the fixture 5 and the detection component, etc. The upper shell surrounds the fixture 5 and the detection component.

[0039] Among them, a cavity is set in the base, and the control device is set in the cavity. The control device can be selected according to specific work needs, for example, it can be an industrial computer 35. An electric control installation board 36 is set in the cavity, and the industrial computer 35 is fixed on the electric control installation board 36. Cabinet doors are set on the front and back sides of the base, and side panels are set on the left and right sides.

[0040] The upper shell mainly includes a back panel, a left panel, a right panel and a top panel, the front side of which is open. A power switch, a power indicator light and a fan are provided on the left panel, an indicator light and a display 61 are provided on the top panel, and the display 61 is connected to the industrial computer 35 signal. A control panel 62 is provided on the top right side of the front side, and the control panel 62 is connected to the industrial computer 35 signal.

[0041] In this embodiment, the jig 5 is preferably cylindrical, and the thermos cup to be tested or other cup-shaped workpiece can be fixed on the jig 5, wherein the thermos cup to be tested can be inverted on the jig 5, and the mouth of the thermos cup to be tested is embedded in the jig 5; alternatively, other types of jigs 5 can also be selected to facilitate the fixing of different workpieces.

[0042] In this embodiment, a driving device is also included, and the driving device can drive the fixture 5 to rotate around its axis; specifically, the driving device mainly includes a servo motor and a reducer. A circular hole with a diameter of about 100 mm is opened in the middle of the working platform 2 for installing the reducer. The reducer is fixed to the working platform 2 by bolts, and the output shaft of the reducer is fixedly connected to the fixture 5 by bolts. The servo motor is arranged below the working platform 2, and the output shaft of the servo motor is connected to the reducer through a coupling; wherein the reducer can be selected according to specific work needs, for example, it can be a planetary reducer 3.

[0043] Furthermore, an involute elastic friction plate is provided above the jig 5. When the thermos cup to be tested is placed on the jig 5, the involute elastic friction plate can be deformed to provide sufficient friction force, so that when the servo motor drives the jig 5 to rotate, it can drive the thermos cup to be tested to rotate.

[0044] Among them, the jig 5 is provided with a jig table, and a fixed shaft is vertically arranged on the jig table. The involute elastic friction plate is a wheel-type structure, and a fixing hole is arranged in the middle thereof, so that it can be fixed on the fixed shaft; when the thermos cup to be tested is placed on the jig 5, the cup mouth of the thermos cup to be tested can be buckled on the outer side of the involute elastic friction plate, so that the involute elastic friction plate is tightened, thereby being able to provide an outward tension to the thermos cup to be tested, thereby achieving the fixation of the thermos cup to be tested.

[0045] In this embodiment, the detection components are preferably provided with six groups, including a first detection component, a second detection component, a third detection component, a fourth detection component, a fifth detection component and a sixth detection component; wherein, the first detection component is used to capture the image of the bottom of the thermos cup to be detected, the second detection component is used to capture the image of the bottom transition surface of the thermos cup to be detected, the third detection component and the sixth detection component are used to capture the image of the lower side surface of the thermos cup to be detected, and the fourth detection component and the fifth detection component are used to capture the image of the upper side surface of the thermos cup to be detected.

[0046] Alternatively, the number of detection components may be adjusted as needed. For example, four or eight groups of detection components may be provided, as long as all-round detection of the surface of the thermos cup to be detected can be achieved.

[0047] In this embodiment, the first detection component mainly includes a first camera 41, a first detection light source 13, a cantilever connecting bracket 8, a camera connecting member 6, a ring light bracket 16 and a first support frame 12, wherein the first support frame 12 is connected to the working platform 2 and is perpendicular to the working platform 2, the cantilever connecting bracket 8 is connected to the top of the first support frame 12, and the cantilever connecting bracket 8 is parallel to the working platform 2, the first camera 41 is connected to the cantilever connecting bracket 8 through the camera connecting member 6, the top of the ring light bracket 16 is connected to the cantilever connecting bracket 8 through a vertical connecting plate, the ring light bracket 16 and the vertical connecting plate form an L-shaped structure, and the bottom of the ring light bracket 16 is connected to the first detection light source 13; wherein the first detection light source 13 is a circular ring light source and is located above the thermos cup to be detected, the first camera 41 is located above the ring light bracket 16, the first detection light source 13 is coaxially arranged with the first camera 41, and the optical axis of the first camera 41 is perpendicular to the working platform 2, and the first camera 41 can capture an image of the bottom of the thermos cup to be detected.

[0048] In this embodiment, the second detection component is arranged based on the first detection component, and mainly includes a camera connecting bracket 15 and a second camera 42. The camera connecting bracket 15 is L-shaped, one side of which is connected to the cantilever connecting bracket 8, and the other side is connected to the second camera 42. The second camera 42 is located above the thermos cup to be inspected, and the optical axis of the second camera 42 is tilted downward toward the thermos cup to be inspected. The second camera 42 is used to capture the image of the bottom transition surface of the thermos cup to be inspected; wherein, the optical axis of the second camera 42 is preferably at an angle of -30° with the working platform 2.

[0049] In this embodiment, the third detection component mainly includes a third camera 43, a second detection light source 30, a first light source connecting bracket 20 and a second light source connecting bracket 21, wherein the second detection light source 30 is an arc light source, both sides of the arc light source are provided with strip grooves, and both sides of the arc light source are connected to the first light source connecting bracket 20 and the second light source connecting bracket 21 by bolts passing through the corresponding strip grooves, and the first light source connecting bracket 20 and the second light source connecting bracket 21 are connected to the working platform 2 by bolts and are perpendicular to the working platform 2;

[0050] The third camera 43 is connected to the first support frame 12 through a camera connector 6, the optical axis of the third camera 43 is parallel to the working platform 2 and is aligned with the central axis of the thermos cup to be inspected, a first through hole is provided on the arc light source, and the first through hole is provided corresponding to the third camera 43, and the third camera 43 can collect the image of the lower side of the thermos cup to be inspected through the first through hole.

[0051] The fourth detection component mainly includes a fourth camera 44, which is connected to the first support frame 12 through a camera connector 6, and the fourth camera 44 is located below the third camera 43; the optical axis of the fourth camera 44 is parallel to the working platform 2 and is aligned with the central axis of the thermos cup to be detected, and a second through hole is provided on the arc light source, and the second through hole is corresponding to the fourth camera 44, and the fourth camera 44 can collect the image of the upper side of the thermos cup to be detected through the second through hole.

[0052] In this embodiment, the dimensions of the arc light source are 270 mm in height and 400 mm in width. The irradiation area can completely cover one side of the thermos cup to be inspected, and the irradiation direction of the light source is distributed along the circumference of the thermos cup to be inspected. The lighting mode is a bright field lighting mode, that is, the light illuminates the surface of the sample and is reflected by the surface of the sample, and finally enters the camera to form an image. In this way, the imaging of planar defects (such as color difference, powdering, abrasions, etc.) can be clearly highlighted.

[0053] In this embodiment, the fifth detection component includes a fifth camera 45, a third detection light source 53, a fourth detection light source 54, a second support frame 11 and a first light source bracket 19, the second support frame 11 is connected to the left side of the workbench and is perpendicular to the work platform 2, the fifth camera 45 is connected to the second support frame 11 through an L-shaped camera connecting plate, and the optical axis of the fifth camera 45 can be aligned with the upper side of the thermos cup to be detected to collect the image of the upper side of the thermos cup to be detected;

[0054] The first light source bracket 19 is connected to the left side of the working platform 2 and is perpendicular to the working platform 2. The third detection light source 53 and the fourth detection light source 54 are connected to a first light source connecting plate 27 through a strip-shaped light source side connecting plate 18. The two first light source connecting plates 27 are respectively connected to the top and bottom of the first light source bracket 19 by bolts, and the light source side connecting plate 18 is hinged to the corresponding first light source connecting plate 27 to adjust the angle between the optical axis of the third detection light source 53 and the fourth detection light source 54 and the central axis of the thermos cup to be detected. The third detection light source 53 and the fourth detection light source 54 are used to provide dark field lighting; wherein, the angle between the optical axis of the third detection light source 53 and the fourth detection light source 54 and the central axis of the thermos cup to be detected is about 30°.

[0055] In this embodiment, the sixth detection component mainly includes a sixth camera 46, a fifth detection light source 55, a third support frame 7 and a second light source bracket 22, the third support frame 7 is connected to the right side of the working platform 2 and is perpendicular to the working platform 2, the sixth camera 46 is connected to the third support frame 7 through an L-shaped camera connecting plate, and the optical axis of the sixth camera 46 can be aligned with the lower side of the thermos cup to be detected to collect the image of the lower side of the thermos cup to be detected;

[0056] The second light source bracket 22 is connected to the right side of the working platform 2 and is perpendicular to the working platform 2. The fifth detection light source 55 is connected to the second light source connecting plate 23 through a strip-shaped light source side connecting plate 18. The second light source connecting plate 23 is connected to the top of the second light source bracket 22. The light source side connecting plate 18 is hinged to the second light source connecting plate 23 to adjust the angle between the optical axis of the fifth detection light source 55 and the central axis of the thermos cup to be detected to be about 30°. The fifth detection light source 55 provides dark field lighting.

[0057] In this embodiment, the third detection light source 53, the fourth detection light source 54 and the fifth detection light source 55 are all bar light sources. The length of the bar light source is 40 mm wider than the diameter of the thermos cup to be inspected, and its lighting mode is a dark field lighting mode, that is, the light source illuminates the sample in an oblique manner. Preferably, the oblique angle is set to 30°. At this time, the general reflected light does not enter the camera. Only when the light source illuminates the edge of non-planar defects such as pits and protrusions, the edge produces strong scattering due to the steep geometric structure and presents a bright outline in the dark field. In this way, the defects of edge undulations such as pits and protrusions on the surface of the thermos cup to be inspected can be highlighted.

[0058] In this embodiment, the angle between the third camera 43 and the sixth camera 46 is 90°, the angle between the fourth camera 44 and the fifth camera 45 is 90°, and the fourth camera 44 is located directly below the third camera 43 .

[0059] In this embodiment, the first support frame 12, the second support frame 11 and the third support frame 7 are preferably dovetail groove brackets. The dovetail groove bracket is a precision adjustment device based on the wedge self-locking principle, which includes structures such as a slide and a guide rail, and is used for spatial posture calibration of the camera / light source.

[0060] Among them, the bottoms of the first support frame 12, the second support frame 11 and the third support frame 7 are all provided with horizontal dovetail groove slides, and the horizontal dovetail groove slides are slidably set on a horizontal guide rail, which is set toward the thermos cup, and a horizontal rack is set on the top along its length direction, and a horizontal adjustment knob is set on the horizontal dovetail groove slide, and a gear matching the above-mentioned horizontal rack is set on the horizontal adjustment knob. By rotating the horizontal adjustment knob, the first support frame 12, the second support frame 11 or the third support frame 7 can be driven to move on the corresponding horizontal guide rail, so that the horizontal working distance (the distance from the thermos cup to be detected) can be adjusted.

[0061] The first support frame 12, the second support frame 11 and the third support frame 7 are also provided with vertical guide rails, on which a vertical dovetail groove slide is slidably provided, and the vertical guide rails are provided with a vertical rack along the length direction thereof, and the vertical dovetail groove slide is provided with a vertical adjustment knob, and the vertical adjustment knob is provided with a gear matching the above-mentioned vertical rack, and the height of the corresponding vertical dovetail groove slide can be adjusted by rotating the vertical adjustment knob.

[0062] In this embodiment, the cantilever connecting bracket 8, the third camera 43 and the fourth camera 44 are each slidably set on the vertical guide rail of the first support frame 12 through a vertical dovetail groove slide, the fifth camera 45 is slidably set on the vertical guide rail of the second support frame 11 through a vertical dovetail groove slide, and the sixth camera 46 is slidably set on the vertical guide rail of the third support frame 7 through a vertical dovetail groove slide.

[0063] Embodiment 2

[0064] This embodiment provides a method for automatically detecting surface defects of a vacuum flask, which is implemented using the automatic detection device for surface defects of a vacuum flask as described in the first embodiment, and mainly includes the following steps:

[0065] Step 1: Select a suitable jig 5 according to the model of the thermos cup to be tested, and embed the mouth of the thermos cup to be tested into the jig 5. The gradient elastic friction plate on the surface of the jig 5 will deform to provide friction for fixing the thermos cup to be tested.

[0066] Step 2: operate the human-computer interaction interface on the control panel 62, click the start detection button, and the control device controls the servo motor to move a predetermined angle at a predetermined speed. Preferably, the servo motor pauses for a short interval every 90° movement. After all cameras complete image acquisition, it continues to move 90° and repeats the image acquisition steps until a 360° image of the body of the thermos cup to be inspected is completely captured. Due to interference between light sources, each detection component needs to be triggered in sequence.

[0067] Specifically, the image acquisition process is as follows: the first detection component is used to detect defects on the bottom surface of the thermos cup to be detected. When the detection starts, the first detection light source 13 is turned on, the first camera 41 is triggered and performs image acquisition. After the image acquisition is completed, the first detection light source 13 is turned off, and the first camera 41 is triggered to close. The second detection component is used to detect defects in the transition area of ​​the bottom surface of the thermos cup to be detected. The second camera 42 is triggered at the same time as the first camera 41, and the first detection light source 13 is used for lighting. After the imaging is completed, the second camera 42 is triggered to close. The third detection component is used to detect defects on the lower side of the thermos cup to be detected, and the fourth detection component is used to detect defects on the upper side of the thermos cup to be detected. When the first detection light source 13 is turned off, the second detection light source 30 is turned on, and the third camera 43 and the fourth camera 44 are triggered at the same time to perform image acquisition. After the image acquisition is completed, the second detection light source 30 is turned off, and the third camera 43 and the fourth camera 44 are triggered to close. The fifth detection component is used to detect defects on the upper side of the thermos cup to be detected. When the second detection light source 30 is turned off, the third detection light source 53 and the fourth detection light source 54 are turned on, and the fifth camera 45 is triggered to collect images of the upper side of the thermos cup to be detected. After the collection is completed, the third detection light source 53 and the fourth detection light source 54 are turned off, and the fifth camera 45 stops triggering. The sixth detection component is used to detect defects on the lower side of the thermos cup to be detected. When the third detection light source 53 and the fourth detection light source 54 are turned off, the fifth detection light source 55 is turned on, and the sixth camera 46 is triggered to collect images of the lower side of the thermos cup to be detected. After the image collection is completed, the fifth detection light source 55 is turned off, and the sixth camera 46 stops triggering.

[0068] The above is the process of a single image acquisition. The complete image acquisition process requires the servo motor to drive the thermos cup to be inspected to rotate 4 times for a total of 360°, and the single image acquisition process needs to be repeated for each rotation. Except for the first camera 41 which only needs to capture an image once, the remaining cameras need to perform 4 image acquisitions to ensure that a complete surface image can be captured around the thermos cup to be inspected.

[0069] In this embodiment, the first camera 41 takes a single shot of the bottom surface of the thermos cup to be inspected, and the other five cameras acquire a complete circumferential image of the surface of the thermos cup to be inspected through four image acquisitions. The total time for image acquisition is within 2.5 seconds, and including the time for algorithm processing, the total time is within 5 seconds, which effectively improves the detection efficiency.

[0070] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An automatic detection device for surface defects of a thermos cup, characterized by: The apparatus comprises a frame, a fixture, a detection component and a control device. The fixture is arranged on the frame and used to fix the thermos cup to be detected. The detection component is provided with multiple groups, and the multiple groups of the detection components can be arranged around the thermos cup to be detected to collect images of different positions of the thermos cup to be detected. The detection component is connected to the control device by signal and can transmit the collected image data to the control device. The control device can detect the surface of the thermos cup to be detected according to the image data. The jig is cylindrical, the thermos cup to be tested can be buckled on the jig, and the mouth of the thermos cup to be tested is embedded in the jig, and also includes a driving device, which can drive the jig to rotate around its axis; an involute elastic friction plate is also provided above the jig, and when the thermos cup to be tested is placed on the jig, the mouth of the thermos cup to be tested can be buckled on the outside of the involute elastic friction plate, so that the involute elastic friction plate is tightened, providing an outward tension to the thermos cup to be tested, so that the jig can drive the thermos cup to be tested to rotate.

2. The automatic detection device for surface defects of a vacuum flask according to claim 1 is characterized by: The frame includes a base and an upper shell. A working platform is arranged on the top of the base. The jig and the detection component are both arranged on the working platform. The upper shell surrounds the jig and the detection component.

3. The automatic detection device for surface defects of a vacuum flask according to claim 2 is characterized in that: The driving device includes a servo motor and a reducer, the reducer is fixed on the working platform, and the output shaft of the reducer is fixedly connected to the fixture, the servo motor is arranged below the working platform, and the output shaft of the servo motor is connected to the reducer through a coupling.

4. The automatic detection device for surface defects of a vacuum flask according to claim 2 is characterized in that: The detection components are provided with six groups, including a first detection component, a second detection component, a third detection component, a fourth detection component, a fifth detection component and a sixth detection component; wherein, the first detection component is used to capture the image of the bottom of the thermos cup to be detected, the second detection component is used to capture the image of the bottom transition surface of the thermos cup to be detected, the third detection component and the sixth detection component are used to capture the image of the lower side surface of the thermos cup to be detected, and the fourth detection component and the fifth detection component are used to capture the image of the upper side surface of the thermos cup to be detected.

5. The automatic detection device for surface defects of a vacuum flask according to claim 4 is characterized in that: The first detection component includes a first camera, a first detection light source, a cantilever connecting bracket, a camera connecting piece, a ring light bracket and a first support frame, wherein the first support frame is connected to the working platform and is perpendicular to the working platform, the cantilever connecting bracket is connected to the top of the first support frame, and the cantilever connecting bracket is parallel to the working platform, the first camera is connected to the cantilever connecting bracket through a camera connecting piece, the top of the ring light bracket is connected to the cantilever connecting bracket, and the bottom is connected to the first detection light source; wherein the first detection light source is a circular ring light source, and is located above the thermos cup to be detected, the first camera is located above the ring light bracket, the first detection light source is coaxially arranged with the first camera, and the optical axis of the first camera is perpendicular to the working platform, and the first camera can capture an image of the bottom of the thermos cup to be detected; Wherein, the first support frame is a dovetail groove support.

6. The automatic detection device for surface defects of a vacuum flask according to claim 5 is characterized by: The second detection component includes a camera connecting bracket and a second camera, the second camera is connected to the cantilever connecting bracket through the camera connecting bracket, the second camera is located above the thermos cup to be detected, and the optical axis of the second camera is tilted downward toward the thermos cup to be detected, and the second camera is used to capture the image of the bottom transition surface of the thermos cup to be detected.

7. The automatic detection device for surface defects of a vacuum flask according to claim 5 is characterized by: The third detection assembly includes a third camera, a second detection light source, a first light source connecting bracket and a second light source connecting bracket, wherein the second detection light source is an arc light source and adopts a bright field lighting mode, two sides of the arc light source are respectively connected to the first light source connecting bracket and the second light source connecting bracket, and the first light source connecting bracket and the second light source connecting bracket are connected to the working platform and are perpendicular to the working platform; The third camera is connected to the first support frame through a camera connector, the optical axis of the third camera is parallel to the working platform and is aligned with the central axis of the thermos cup to be detected, a first through hole is provided on the arc light source, the first through hole is correspondingly provided to the third camera, and the third camera can collect an image of the lower side of the thermos cup to be detected through the first through hole; The fourth detection component includes a fourth camera, which is connected to the first support frame through a camera connector, and the fourth camera is located below the third camera; the optical axis of the fourth camera is parallel to the working platform and aligned with the central axis of the thermos cup to be detected, and a second through hole is provided on the arc light source, and the second through hole is arranged corresponding to the fourth camera, and the fourth camera can capture the image of the upper side of the thermos cup to be detected through the second through hole.

8. The automatic detection device for surface defects of a vacuum flask according to claim 5 is characterized by: The fifth detection assembly includes a fifth camera, a third detection light source, a fourth detection light source, a second support frame and a first light source support frame, wherein the fifth camera is connected to the second support frame via a camera connection plate, wherein the second support frame is a dovetail groove support, and the optical axis of the fifth camera can be aligned with the upper side of the thermos cup to be detected to collect an image of the upper side of the thermos cup to be detected; The third detection light source and the fourth detection light source are both connected to a first light source connecting plate via a light source side connecting plate, the two first light source connecting plates are respectively connected to the top and bottom of the first light source bracket, and the light source side connecting plate is hinged to the corresponding first light source connecting plate to adjust the angle between the optical axis of the third detection light source and the fourth detection light source and the central axis of the thermos cup to be detected, and the third detection light source and the fourth detection light source are used to provide dark field illumination.

9. The automatic detection device for surface defects of a vacuum flask according to claim 5, characterized in that: The sixth detection assembly includes a sixth camera, a fifth detection light source, a third support frame and a second light source support frame, wherein the sixth camera is connected to the third support frame via a camera connecting plate, wherein the third support frame is a dovetail groove support, and the optical axis of the sixth camera can be aligned with the lower side of the thermos cup to be detected to collect an image of the lower side of the thermos cup to be detected; The fifth detection light source is connected to the second light source connecting plate through a light source side connecting plate, the second light source connecting plate is connected to the top of the second light source bracket, the light source side connecting plate is hinged to the second light source connecting plate to adjust the angle between the optical axis of the fifth detection light source and the central axis of the thermos cup to be detected, and the fifth detection light source is used to provide dark field illumination.

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