Defect Detection Device, System and Method

Abstract

A defect detection device, its system and method, which relate to the field of detection instruments; the defect detection device, its system and method include a transmission mechanism, an image acquisition mechanism and a mounting base; the transmission mechanism is arranged on the mounting base and is used for transmitting the product to be detected to the detection area; the image acquisition mechanism is connected to the mounting base; the image acquisition mechanism includes a first light source, a second light source and an image acquisition element; the first light source is located above and / or below the product to be detected in the detection area; the second light source is arranged on the side of the product to be detected in the detection area, and the light of the second light source can enter from the side of the product to be detected and penetrate through the product to be detected; the image acquisition element is located above and / or below the product to be detected in the detection area. The purpose of the present invention is to provide a defect detection device, its system and method to improve the defect judgment of dust, bosses and pits on the surface of the electronic screen.

Description

Technical Field

[0001] The present invention relates to the field of detection instruments, and more particularly, to a defect detection device, its system and method. Background Art

[0002] With the advent of the "mobile era", portable and efficient mobile phones and tablet electronic products will become the first choice for business people and the younger generation. They are changing our lifestyle and living habits. Subsequently, in the field of visual inspection, especially in the inspection of the mobile phone and electronic tablet industries, the requirements for electronic screens are getting higher and higher.

[0003] Currently, although the existing electronic screen defect detection can detect some defects on the surface of the electronic screen, it is unable to determine whether the defects on the surface of the electronic screen are dust, protrusions or pits. Summary of the Invention

[0004] The purpose of the present invention is to provide a defect detection device, its system and method to improve the defect judgment of dust, protrusions and pits on the surface of the electronic screen.

[0005] The embodiments of the present invention are implemented as follows:

[0006] A defect detection device includes a transmission mechanism, an image acquisition mechanism and a mounting base;

[0007] The transmission mechanism is arranged on the mounting base and is used to transfer the product to be detected to the detection area;

[0008] The image acquisition mechanism is connected to the mounting base; the image acquisition mechanism includes a first light source, a second light source and an image acquisition element;

[0009] The first light source is located above and / or below the product to be detected in the detection area; the second light source is arranged on the side of the product to be detected in the detection area, and the light of the second light source can enter from the side of the product to be detected and penetrate through the product to be detected; the image acquisition element is located above and / or below the product to be detected in the detection area.

[0010] Optionally, the transmission mechanism includes a driving device, a transmission device and a conveying device for transferring the product to be detected; the driving device is drivingly connected to the conveying device through the transmission device, and the driving device is arranged on the mounting base;

[0011] The mounting base has a detection through-hole corresponding to the position of the detection area; the first light source, the second light source and the image acquisition element are all corresponding to the position of the detection through-hole;

[0012] The conveying device is used to sequentially convey the products to be detected to the detection through-hole.

[0013] Optionally, the conveying device includes a pair of conveyor belts; the pair of conveyor belts are sequentially arranged at intervals along the conveying direction of the conveying device;

[0014] The gap between the pair of conveyor belts is a conveying gap; the conveying gap is arranged above the detection through-hole and corresponds to the detection area in position;

[0015] The position of the second light source corresponds to the conveying gap, and the light of the second light source can pass through the conveying gap.

[0016] Optionally, the transmission mechanism includes a sensor for detecting the position of the product to be detected; a sensor bracket connected to the sensor is fixedly connected to the mounting base.

[0017] Optionally, a side light source mounting member is fixedly connected to the mounting base; the side light source mounting member is arranged on the side of the conveying device and corresponds to the detection through-hole in position;

[0018] The side light source mounting member is provided with a side light source mounting groove extending in a direction perpendicular to the conveying direction of the conveying device; the second light source is arranged in the side light source mounting groove, and the second light source can be fixed at different positions in the side light source mounting groove to change the distance between the second light source and the product to be detected;

[0019] And / or, the side light source mounting member is connected with a pair of light-shielding plates; the pair of light-shielding plates are arranged above the detection through-hole, and the gap between the pair of light-shielding plates corresponds to the detection area in position.

[0020] Optionally, the transmission device includes a driving shaft arranged on the side of the mounting base;

[0021] The mounting base is fixedly connected with a driving shaft mounting seat;

[0022] The driving shaft mounting seat includes a driving shaft mounting seat body, a driving shaft mounting seat gland and a driving shaft mounting seat bearing connecting the driving shaft; the driving shaft mounting seat body is fixedly connected with the mounting base; the driving shaft mounting seat bearing is fixed in the driving shaft mounting seat body through the driving shaft mounting seat gland, and the driving shaft mounting seat gland is arranged on the side of the driving shaft mounting seat body.

[0023] Optionally, the image acquisition mechanism further includes an image acquisition support device for supporting and connecting the first light source and the image acquisition element;

[0024] The image acquisition support device includes an acquisition slide rail, an acquisition bracket, an acquisition connecting piece, and an acquisition rotating piece;

[0025] The acquisition slide rail is fixedly connected to the installation base;

[0026] The bottom of the acquisition bracket is slidably connected to the acquisition slide rail, the top of the acquisition bracket is connected to the acquisition connecting piece, and the acquisition connecting piece can be fixed at different heights of the acquisition bracket;

[0027] The acquisition rotating piece is rotatably and fixedly connected to the acquisition connecting piece;

[0028] The first light source or the image acquisition element is respectively detachably and fixedly connected to the acquisition rotating piece.

[0029] Optionally, the image acquisition support device further includes an acquisition adjustment piece;

[0030] The acquisition adjustment piece is detachably connected to the acquisition rotating piece; along a direction perpendicular to the rotation direction of the acquisition rotating piece, the acquisition adjustment piece can be fixed at different positions of the acquisition rotating piece;

[0031] The first light source or the image acquisition element is respectively connected to the acquisition rotating piece through the acquisition adjustment piece.

[0032] Optionally, the first light source is a linear light source; the second light source is a laser; the image acquisition element is a line scan camera;

[0033] And / or, the light of the second light source can be parallel to the surface of the product to be detected.

[0034] A defect detection system includes a defect detection device, and also includes a chassis, a control device, a display device, a ventilation device, and a warning device;

[0035] The control device and the display device are both arranged on the chassis, the control device is used to control the defect detection device to work; the display device is used to display the detection result of the defect detection device;

[0036] The ventilation device and the warning device are both arranged outside the chassis; the ventilation device is used to exchange the air inside the chassis; the warning device is used to display the working state of the defect detection device.

[0037] A defect detection method, applicable to a defect detection device, the method includes,

[0038] The transmission mechanism transports the product to be detected to the detection area;

[0039] The first light source and the second light source of the image acquisition mechanism flash alternately to irradiate the product to be detected. Meanwhile, the image acquisition element acquires the image of the product to be detected and forms an acquired image.

[0040] For the bright spot shown in the acquired image under the irradiation of the first light source, when irradiated by the second light source, the bright spot area generated by dust is S1, the bright spot area generated by the convex points on the surface of the product to be detected is S2, and the bright spot area generated by the concave points on the surface of the product to be detected is S3. Then the relationship among S1, S2, and S3 is: S1 > S2 > S3; the bright spot area of the concave points on the surface of the product to be detected in the acquired image under the irradiation of the first light source is the same as the bright spot area of the concave points on the surface of the product to be detected in the acquired image under the irradiation of the second light source; thus, the defects of the product to be detected are judged.

[0041] The beneficial effects are mainly as follows:

[0042] The defect detection device, its system and method provided by the present invention transfer the product to be detected to the detection area through the transfer mechanism, so that the image acquisition element can acquire the image of the product to be detected under the alternate irradiation of the first light source and the second light source; since the bright spot areas shown in the captured acquired image of the dust, convex platforms, and concave pits on the surface of the product to be detected are different under the irradiation of the first light source and the second light source, the defects of dust, convex platforms, and concave pits can be judged by comparing the bright spot areas. Specifically, for the bright spot shown in the acquired image of the image acquisition mechanism under the irradiation of the first light source, when the defect on the surface of the product to be detected is a concave point, there is no obvious change in the bright spot shown in the acquired image under the irradiation of the second light source. When the defect on the surface of the product to be detected is a convex point, the bright spot shown in the acquired image under the irradiation of the second light source is slightly larger. When the defect on the surface of the product to be detected is dust, the acquired image shows a very large bright spot under the irradiation of the second light source. Description of the Drawings

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0044] Figure 1 It is a perspective view of the defect detection device provided by the embodiment of the present invention;

[0045] Figure 2 It is a front view of the defect detection device provided by the embodiment of the present invention;

[0046] Figure 3 It is a perspective view of the image acquisition mechanism provided by the embodiment of the present invention;

[0047] Figure 4 Isometric view of the transmission mechanism provided by the embodiment of the present invention;

[0048] Figure 5 Front view of the transmission mechanism provided by the embodiment of the present invention;

[0049] Figure 6 Isometric view of the defect detection system provided by the embodiment of the present invention;

[0050] Figure 7 Isometric view of the defect detection system without showing the chassis provided by the embodiment of the present invention.

[0051] Icons: 100 - Transmission mechanism; 110 - Driving device; 120 - Conveying device; 121 - Conveyor belt; 130 - Side light source mounting member; 140 - Light shield; 150 - Transmission device; 151 - Driving shaft; 152 - Driven shaft; 160 - Guiding device; 161 - First guiding plate; 162 - Second guiding plate; 170 - Sensor; 171 - Sensor bracket;

[0052] 200 - Image acquisition mechanism; 210 - Acquisition slide rail; 220 - Acquisition bracket; 230 - Acquisition connecting member; 240 - Acquisition rotating member; 250 - Acquisition adjusting member; 270 - First light source; 271 - Second light source; 272 - Image acquisition element;

[0053] 300 - Installation base; 310 - Detection through hole; 400 - Product to be detected; 510 - Chassis; 520 - Control device; 530 - Display device; 540 - Ventilation device; 550 - Warning device. Detailed implementation manners

[0054] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0056] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0057] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0058] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0059] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0061] Embodiment

[0062] Please refer to Figures 1-5 As shown, this embodiment provides a defect detection device, Figure 1 is a perspective view of the defect detection device provided in this embodiment, Figure 2 is the front view of the defect detection device, Figure 3 is a perspective view of the image acquisition mechanism, Figure 4 is a perspective view of the transmission mechanism, Figure 5 is the front view of the transmission mechanism; wherein Figure 1 and Figure 3 show the light rays of the first light source with a rectangular body a.

[0063] The defect detection device provided in this embodiment is used to detect defects in electronic screens, especially defects in glass screens.

[0064] See Figures 1-5 As shown, the defect detection device includes a transmission mechanism 100, an image acquisition mechanism 200, and a mounting base 300.

[0065] The transmission mechanism 100 is arranged on the mounting base 300 and is used to transport the product 400 to be detected to the detection area; the product 400 to be detected is, for example, an electronic screen such as a mobile phone or an electronic tablet, and can also be a glass product or a product similar to glass. Optionally, the product to be detected is made of a light-transmitting material.

[0066] The image acquisition mechanism 200 is connected to the mounting base 300; the image acquisition mechanism 200 includes a first light source 270, a second light source 271, and an image acquisition element 272.

[0067] The first light source 270 is located above and / or below the product 400 to be detected in the detection area; that is, the first light source 270 is located above the product 400 to be detected in the detection area, or the first light source 270 is located below the product 400 to be detected in the detection area, or the first light source 270 is located above and below the product 400 to be detected in the detection area. Optionally, the first light source 270 is provided above and below the product 400 to be detected in the detection area to improve the accuracy of defect detection of the product 400 to be detected. Among them, when the first light source 270 is located above or below the product 400 to be detected in the detection area, the light of the first light source 270 can be perpendicular to the surface of the product 400 to be detected, or the light of the first light source 270 can be set at an angle to the surface of the product 400 to be detected. For example, the light of the first light source 270 is slightly inclined.

[0068] The second light source 271 is arranged on the side of the product 400 to be detected in the detection area, and the light of the second light source 271 can enter from the side of the product 400 to be detected and penetrate the product 400;

[0069] The image acquisition element 272 is located above and / or below the product 400 to be detected in the detection area; that is, the image acquisition element 272 is located above the product 400 to be detected in the detection area, or the image acquisition element 272 is located below the product 400 to be detected in the detection area, or the image acquisition element 272 is located above and below the product 400 to be detected in the detection area. Optionally, the image acquisition element 272 is provided above and below the product 400 to be detected in the detection area to improve the accuracy of defect detection of the product 400 to be detected.

[0070] Optionally, the first light source 270 is a linear light source or other similar light sources.

[0071] Optionally, the second light source 271 is a laser or other similar light source.

[0072] Optionally, the image acquisition element 272 is a line scan camera or other similar camera.

[0073] Optionally, the light rays of the second light source 271 can be parallel or approximately parallel to the surface of the product 400 to be detected. By making the light rays of the second light source 271 incident on the product to be detected in parallel, it is easier to detect the defects of the product to be detected directly or in cooperation with other detection means, which improves the accuracy and efficiency of product defect detection to a certain extent. For example, by cooperating the first light source 270, the second light source 271 and the image acquisition element 272, defects such as dust, bosses and pits on the product to be detected can be judged, greatly improving the detection efficiency of defects such as dust, bosses and pits on the product to be detected.

[0074] In the defect detection device described in this embodiment, the product 400 to be detected is transported to the detection area through the transport mechanism 100, so that the image acquisition element 272 can acquire the images of the product 400 to be detected under the alternating illumination of the first light source 270 and the second light source 271; since the dust, bosses and pits on the surface of the product 400 to be detected have different bright spot areas shown in the captured images under the illumination of the first light source 270 and the second light source 271, the dust, boss and pit defects can be judged by comparing the bright spot areas. Specifically, for the bright spot shown in the captured image under the illumination of the first light source 270, when the defect on the surface of the product 400 to be detected is a concave point, there is no obvious change in the bright spot shown in the captured image under the illumination of the second light source 271; when the defect on the surface of the product 400 to be detected is a convex point, the bright spot shown in the captured image under the illumination of the second light source 271 is slightly larger; when the defect on the surface of the product 400 to be detected is dust, a very large bright spot is shown in the captured image under the illumination of the second light source 271.

[0075] See Figure 4 and Figure 5 As shown in, in the optional solution of this embodiment, the transport mechanism 100 includes a driving device 110, a transmission device 150 and a conveying device 120 for transporting the product 400 to be detected; the driving device 110 is drivingly connected to the conveying device 120 through the transmission device 150 to drive the product 400 to be detected to move.

[0076] The mounting base 300 has a detection through-hole 310 corresponding to the position of the detection area; optionally, in the conveying direction of the conveying device 120, the cross-sectional area of the detection through-hole 310 is larger than the cross-sectional area of the detection area.

[0077] The first light source 270, the second light source 271, and the image acquisition element 272 all correspond to the position of the detection through-hole 310; so as to facilitate irradiating and photographing the product 400 to be detected.

[0078] The conveying device 120 is used to sequentially convey the product 400 to be detected to the detection through-hole 310. Through the detection through-hole 310, it is convenient for the first light source 270, the second light source 271, and the image acquisition element 272 to irradiate and photograph the product 400 to be detected with a better view, thereby facilitating the discovery of defects in the product 400 to be detected.

[0079] See Figure 4 and Figure 5 As shown, in an alternative embodiment of the present embodiment, the conveying device 120 includes a pair of conveyor belts 121; the pair of conveyor belts 121 are sequentially arranged at intervals along the conveying direction of the conveying device 120;

[0080] The gap between the pair of conveyor belts 121 is the conveying gap; the conveying gap is arranged above the detection through-hole 310 and corresponds to the detection area in position;

[0081] The position of the second light source 271 corresponds to the conveying gap, and the light of the second light source 271 can pass through the conveying gap. Through the conveying gap, it is possible to prevent the conveyor belt 121 from interfering with the image acquisition element 272 when collecting the product 400 to be detected, so as to improve the quality of the image acquisition element 272 when collecting the product 400 to be detected, and to improve the accuracy of defect detection of the product 400 to be detected.

[0082] In an alternative embodiment of the present embodiment, a side light source mounting member 130 is fixedly connected to the mounting base 300; the side light source mounting member 130 is arranged on the side of the conveying device 120 and corresponds to the position of the detection through-hole 310; through the side light source mounting member 130, it is convenient to fix the second light source 271.

[0083] Optionally, the side light source mounting member 130 is provided with a side light source mounting groove extending in a direction perpendicular to the conveying direction of the conveying device 120; the second light source 271 is arranged in the side light source mounting groove, and the second light source 271 can be fixed at different positions in the side light source mounting groove to change the distance between the second light source 271 and the product 400 to be detected; optionally, the side light source mounting member 130 is provided with a pressing member for fixing the second light source 271, so as to facilitate firmly fixing the second light source 271 in the side light source mounting groove. Optionally, the position of the second light source 271 fixed in the side light source mounting groove can be manually changed.

[0084] Optionally, a pair of light-shielding plates 140 are connected to the side light source mount 130; the pair of light-shielding plates 140 are disposed above the detection through-hole 310, and the gap between the pair of light-shielding plates 140 corresponds to the position of the detection area; to prevent other light from interfering with the image acquisition element 272 from acquiring the product 400 to be detected, so as to improve the quality of the image acquisition element 272 acquiring the product 400 to be detected, and to improve the accuracy rate of defect detection of the product 400 to be detected. Optionally, the gap between the pair of light-shielding plates 140 corresponds to the position of the conveying gap, so as to further improve the accuracy rate of defect detection of the product 400 to be detected. Optionally, the light-shielding plates 140 are made of light-impermeable materials, for example, made of stainless steel materials, plastics and other materials.

[0085] Optionally, the transmission device 150 includes a driving shaft 151 and a plurality of driven shafts 152; the plurality of driven shafts 152 are sequentially and spaced apart along the conveying direction of the conveying device 120 on the mounting base 300.

[0086] Optionally, the driving shaft 151 is drivingly connected to the driven shafts 152, and each conveyor belt 121 is connected to at least two driven shafts 152; so that the conveyor belt 121 is driven; for example, the number of driven shafts 152 connected to each conveyor belt 121 is two, three, five, etc.

[0087] Optionally, the driving shaft 151 is disposed on the side of the mounting base 300. By disposing the driving shaft 151 on the side of the mounting base 300, to prevent the driving shaft 151 from interfering with the image acquisition element 272 from acquiring the image of the product 400 to be detected, so as to improve the quality of the image acquisition element 272 acquiring the image of the product 400 to be detected, and to improve the accuracy rate of defect detection of the product 400 to be detected. Optionally, the driving shaft 151 is located below the driven shafts 152.

[0088] Optionally, the mounting base 300 is fixedly connected with a driving shaft mounting seat; the number of the driving shaft mounting seats is multiple; for example, the number of the driving shaft mounting seats is 2, 3, 4, etc. Optionally, the driving shaft 151 includes a plurality of driving shaft 151 parts connected in sequence, so as to facilitate the production and processing of the driving shaft 151. Optionally, adjacent driving shaft 151 parts are connected by a coupling.

[0089] Optionally, the driving shaft mounting seat includes a driving shaft mounting seat body, a driving shaft mounting seat gland, and a driving shaft mounting seat bearing connecting the driving shaft 151; the driving shaft mounting seat body is fixedly connected with the mounting base 300; the driving shaft mounting seat bearing is fixed in the driving shaft mounting seat body by the driving shaft mounting seat gland, and the driving shaft mounting seat gland is disposed on the side of the driving shaft mounting seat body. By connecting the driving shaft mounting seat gland to the side of the driving shaft mounting seat body, the axial runout of the driving shaft 151 during operation is reduced to a certain extent, and overpressure of the bearing can be prevented to a certain extent, thereby improving the service life of the bearing.

[0090] Optionally, the driving shaft 151 and the driven shaft 152 are driven by a magnetic wheel or a bevel gear.

[0091] Optionally, the side light source mounting member 130 is provided with two driven shaft mounting grooves extending perpendicularly to the conveying direction of the conveying device 120;

[0092] The driven shaft 152 is arranged in the driven shaft installation groove, and the driven shaft 152 can be manually fixed at different positions in the driven shaft installation groove to adjust the size of the driven shaft 152 extending toward the conveyor belt 121. By manual adjustment, the production cost of the defect detection equipment can also be reduced.

[0093] Optionally, a side light source installation groove is provided between the installation grooves of the two driven shafts 152. Optionally, the two driven shafts 152 are connected to adjacent conveyor belts 121, respectively.

[0094] See also Figure 4 and Figure 5 As shown, optionally, the transmission mechanism 100 includes a guide device 160 connected to the mounting base 300; the guide device 160 is arranged at the entrance and / or exit of the conveying device 120, that is, the guide device 160 is arranged at the entrance or exit, or the entrance and exit of the conveying device 120; optionally, the guide device 160 has a guide channel for guiding the movement of the product 400 to be inspected, and the channel opening size of the guide channel at the entrance or exit of the conveying device 120 is larger than the channel opening size at other positions, so as to facilitate the conveying device 120 to input and output the product 400 to be inspected.

[0095] Specifically, the guide device 160 includes a pair of first guide plates 161 and a pair of second guide plates 162 ; the second guide plates 162 are located between the first guide plates 161 and the detection through holes 310 ; that is, the first guide plates 161 are located at the entrance or exit of the conveying device 120 .

[0096] The conveying device 120 is disposed between a pair of first guide plates 161 and between a pair of second guide plates 162;

[0097] The distance between the pair of first guide plates 161 is greater than the distance between the pair of second guide plates 162 , so as to facilitate the conveying device 120 to input and output the to-be-detected product 400 .

[0098] See also Figure 4 and Figure 5 As shown, optionally, the transmission mechanism 100 includes a sensor 170 for detecting the position of the product 400 to be detected; through the sensor 170, the position of the product 400 to be detected is monitored in time, thereby facilitating the control of the operation of the first light source 270 and the second light source 271, and facilitating the control of the image acquisition element 272 to capture images.

[0099] Optionally, a sensor bracket 171 connected to the sensor 170 is fixedly connected to the mounting base 300. Through the sensor bracket 171, it is convenient to fix the sensor 170.

[0100] See Figures 1-3 As shown, in an alternative embodiment of the present embodiment, the image acquisition mechanism 200 further includes an image acquisition support device that supports and connects the first light source 270 and the image acquisition element 272;

[0101] The image acquisition support device includes an acquisition slide rail 210, an acquisition bracket 220, an acquisition connecting member 230, and an acquisition rotating member 240;

[0102] The acquisition slide rail 210 is fixedly connected to the mounting base 300; for example, the acquisition slide rail 210 is fixedly connected to the mounting base 300 by means of screws, welding, riveting, etc. Optionally, the acquisition slide rail 210 is fixedly connected to the mounting base 300 through a connecting member.

[0103] The bottom of the acquisition bracket 220 is slidably connected to the acquisition slide rail 210. The top of the acquisition bracket 220 is connected to the acquisition connecting member 230, and the acquisition connecting member 230 can be fixed at different heights of the acquisition bracket 220; for example, the acquisition connecting member 230 is detachably fixed at different heights of the acquisition bracket 220 by screws. By slidably connecting the bottom of the acquisition bracket 220 to the acquisition slide rail 210, it is convenient to adjust the position of the acquisition bracket 220 on the acquisition slide rail 210, and further convenient to adjust the position of the first light source 270 or the image acquisition element 272 on the acquisition slide rail 210, so as to adjust the working area of the first light source 270 or the image acquisition element 272 to cover the detection area; by being able to fix the acquisition connecting member 230 at different heights of the acquisition bracket 220, it is convenient to adjust the height of the acquisition connecting member 230, and further convenient to adjust the height of the first light source 270 or the image acquisition element 272.

[0104] The acquisition rotating member 240 is rotatably and fixedly connected to the acquisition connecting member 230; by rotatably connecting the acquisition rotating member 240 to the acquisition connecting member 230, it is convenient to adjust the angle of the acquisition rotating member 240, and further convenient to adjust the angle of the first light source 270 or the image acquisition element 272, so as to improve the image acquisition quality of the image acquisition element 272 to a certain extent, and improve the accuracy of defect detection of the product 400 to be detected.

[0105] The first light source 270 or the image acquisition element 272 is respectively detachably and fixedly connected to the acquisition rotating member 240.

[0106] Optionally, the acquisition rotating member 240 is rotatably and fixedly connected to the acquisition connecting member 230 by a screw.

[0107] See Figure 3 As shown, in an alternative solution of this embodiment, the image acquisition support device further includes an acquisition adjustment member 250;

[0108] The acquisition adjustment member 250 is detachably connected to the acquisition rotation member 240; along a direction perpendicular to the rotation direction of the acquisition rotation member 240, the acquisition adjustment member 250 can be fixed at different positions of the acquisition rotation member 240; for example, the acquisition adjustment member 250 can be detachably fixed at different positions of the acquisition rotation member 240 by screws. By being able to fix the acquisition adjustment member 250 at different positions of the acquisition rotation member 240, it is convenient to finely adjust the position of the acquisition adjustment member 250, and further convenient to finely adjust the position of the first light source 270 or the image acquisition element 272, so as to adjust the working area of the first light source 270 or the image acquisition element 272 to cover the detection area.

[0109] Optionally, the first light source 270 or the image acquisition element 272 is respectively connected to the acquisition rotation member 240 through the acquisition adjustment member 250.

[0110] Optionally, the bottom of the acquisition support 220 can move left and right on the acquisition slide rail 210, and the acquisition adjustment member 250 can be fixed at different front and rear positions of the acquisition rotation member 240; so that the first light source 270 or the image acquisition element 272 can find the optimal position through coordinated adjustment in terms of angle, up and down, front and back, left and right.

[0111] See Figure 6 and Figure 7 As shown, this embodiment also provides a defect detection system, Figure 6 and Figure 7 are the three-dimensional views of the defect detection system provided in this embodiment. Among them, Figure 6 is the three-dimensional view of the defect detection system showing the chassis, Figure 7 is the three-dimensional view of the defect detection system without showing the chassis.

[0112] See Figure 6 and Figure 7 As shown, the defect detection system provided in this embodiment includes the above-mentioned defect detection device, and further includes a chassis 510, a control device 520, a display device 530, a ventilation device 540, and a warning device 550;

[0113] Both the control device 520 and the display device 530 are arranged on the chassis 510. The control device 520 is used to control the operation of the defect detection device; the display device 530 is used to display the detection results of the defect detection device; optionally, the control device 520 is one or more of a button, a touch screen, and voice control.

[0114] The ventilation device 540 and the warning device 550 are both arranged outside the chassis 510; the ventilation device 540 is used to exchange the air inside the chassis 510; the warning device 550 is used to display the working state of the defect detection device.

[0115] Optionally, the ventilation device 540 is located at the top of the chassis 510. Optionally, the ventilation device 540 adopts a fan filter unit.

[0116] Optionally, the warning device 550 is a three-color light; the three-color light can emit red, green, and yellow lights. When the defect detection device is working normally, the three-color light can emit green light; when the defect detection device fails, the three-color light can emit red light; when the defect detection device pauses working, the three-color light can emit yellow light.

[0117] In the optional solution of this embodiment, a plurality of defect detection devices are arranged inside the chassis 510; for example, the number of defect detection devices arranged inside the chassis 510 is two, three, four, etc.

[0118] The defect detection system described in this embodiment includes the above-mentioned defect detection device, and the technical features of the above-mentioned defect detection device are also applicable to this defect detection system. The technical features of the above-mentioned disclosed defect detection device will not be described repeatedly. The defect detection system described in this embodiment has the advantages of the above-mentioned defect detection device, and the advantages of the defect detection device will not be described repeatedly here.

[0119] This embodiment also provides a defect detection method, which is applicable to the above-mentioned defect detection device; this method includes,

[0120] The transmission mechanism 100 transports the product 400 to be detected to the detection area;

[0121] The first light source 270 and the second light source 271 of the image acquisition mechanism 200 flash alternately, irradiating the product 400 to be detected, and at the same time the image acquisition element 272 acquires the image of the product 400 to be detected and forms an acquired image; that is to say, when the first light source 270 and the second light source 271 flash alternately, the image acquisition element 272 always works to acquire images.

[0122] The bright spots shown in the image collected under the illumination of the first light source 270, after being illuminated by the second light source 271, the bright spot area generated by dust is S1, the bright spot area generated by the convex points on the surface of the product to be detected is S2, and the bright spot area generated by the concave points on the surface of the product to be detected is S3. Then the relationship among S1, S2, and S3 is: S1 > S2 > S3; the bright spot area generated by the concave points on the surface of the product to be detected 400 in the collected image under the illumination of the first light source 270 is the same or substantially the same as the bright spot area generated by the concave points on the surface of the product to be detected 400 in the collected image under the illumination of the second light source 271; based on this, the defects of the product to be detected 400 are judged. It can be understood that under the illumination of the first light source 270, the bright spots shown on the collected image formed by the image acquisition element 272 collecting the product to be detected 400, after being illuminated by the second light source 271, if the bright spot area does not increase substantially, it can be judged that the bright spot is a concave point on the surface of the product to be detected 400; if the bright spot area increases a little, it can be judged that the bright spot is a convex point on the surface of the product to be detected 400; if the bright spot area increases a lot, it can be judged that the bright spot is dust on the surface of the product to be detected 400; among them, for example, when the bright spot area increases a little, it can be that the bright spot area shown under the illumination of the second light source 271 is 1.5 to 2.5 times the bright spot area shown under the illumination of the first light source 270, and it can be judged that the bright spot is a convex point on the surface of the product to be detected 400; for example, when the bright spot area increases a lot, it can be that the bright spot area shown under the illumination of the second light source 271 is more than 10 times the bright spot area shown under the illumination of the first light source 270, and it can be judged that the bright spot is dust on the surface of the product to be detected 400.

[0123] The defect detection method described in this embodiment is applicable to the above-mentioned defect detection device, and the technical features of the above-mentioned defect detection device are also applicable to this defect detection method. The technical features of the above-mentioned disclosed defect detection device will not be described repeatedly. The defect detection method described in this embodiment has the advantages of the above-mentioned defect detection device, and the advantages of the above-mentioned defect detection device will not be described repeatedly here.

[0124] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A defect detection method, characterized in that, it is applicable to a defect detection device; the defect detection device includes a transmission mechanism, an image acquisition mechanism and a mounting base; the transmission mechanism is arranged on the mounting base and is used for transmitting the product to be detected to the detection area; the image acquisition mechanism is connected to the mounting base; the image acquisition mechanism includes a first light source, a second light source and an image acquisition element; the first light source is located above and / or below the product to be detected in the detection area; the second light source is arranged on the side of the product to be detected in the detection area, and the light of the second light source can enter from the side of the product to be detected and penetrate through the product to be detected; the image acquisition element is located above and / or below the product to be detected in the detection area; the defect detection method includes, the transmission mechanism transmits the product to be detected to the detection area; the first light source and the second light source of the image acquisition mechanism flash alternately to irradiate the product to be detected, and at the same time the image acquisition element acquires an image of the product to be detected and forms an acquired image; for the bright spots shown in the acquired image under the irradiation of the first light source, after being irradiated by the second light source, the bright spot area generated by dust is S1, the bright spot area generated by the convex points on the surface of the product to be detected is S2, and the bright spot area generated by the concave points on the surface of the product to be detected is S3. The relationship between S1, S2 and S3 is: S1 > S2 > S3; the bright spot area generated by the concave points on the surface of the product to be detected in the acquired image under the irradiation of the first light source is the same as the bright spot area generated by the concave points on the surface of the product to be detected in the acquired image under the irradiation of the second light source; thus, the defects of the product to be detected are judged; for the bright spots shown in the acquired image of the image acquisition mechanism under the irradiation of the first light source, when the defect on the surface of the product to be detected is a concave point, there is no obvious change in the bright spots shown in the acquired image under the irradiation of the second light source. When the defect on the surface of the product to be detected is a convex point, the bright spots shown in the acquired image under the irradiation of the second light source are slightly larger. When the defect on the surface of the product to be detected is dust, the acquired image shows extremely large bright spots under the irradiation of the second light source.

2. The defect detection method according to claim 1, characterized in that, the transmission mechanism includes a driving device, a transmission device and a conveying device for transmitting the product to be detected; the driving device is drivingly connected to the conveying device through the transmission device, and the driving device is arranged on the mounting base; the mounting base has a detection through hole corresponding to the position of the detection area; the first light source, the second light source and the image acquisition element are all corresponding to the position of the detection through hole; the conveying device is used for sequentially conveying the product to be detected to the detection through hole.

3. The defect detection method according to claim 2, characterized in that, The conveying device includes a pair of conveyor belts; the pair of conveyor belts are arranged at intervals in sequence along the conveying direction of the conveying device; the gap between the pair of conveyor belts is a conveying gap; the conveying gap is arranged above the detection through hole and corresponds to the detection area in position; the position of the second light source corresponds to the conveying gap, and the light of the second light source can pass through the conveying gap. The transmission mechanism includes a sensor for detecting the position of the product to be detected; a sensor bracket connected to the sensor is fixedly connected to the mounting base.

4. The defect detection method according to claim 2, characterized in that a side light source mounting member is fixedly connected to the mounting base; the side light source mounting member is arranged on the side of the conveying device and corresponds to the detection through hole in position. The side light source mounting member is provided with a side light source mounting groove extending along a direction perpendicular to the conveying direction of the conveying device; the second light source is arranged in the side light source mounting groove, and the second light source can be fixed at different positions in the side light source mounting groove to change the distance between the second light source and the product to be detected. The side light source mounting member is connected with a pair of light shielding plates; the pair of light shielding plates are arranged above the detection through hole, and the gap between the pair of light shielding plates corresponds to the detection area in position.

5. The defect detection method according to claim 2, characterized in that the transmission device includes a driving shaft arranged on the side of the mounting base; the mounting base is fixedly connected with a driving shaft mounting seat; The driving shaft mounting seat includes a driving shaft mounting seat body, a driving shaft mounting seat gland and a driving shaft mounting seat bearing connecting the driving shaft; the driving shaft mounting seat body is fixedly connected with the mounting base; the driving shaft mounting seat bearing is fixed in the driving shaft mounting seat body through the driving shaft mounting seat gland, and the driving shaft mounting seat gland is arranged on the side of the driving shaft mounting seat body.

6. The defect detection method according to any one of claims 1-5, characterized in that the image acquisition mechanism further includes an image acquisition support device for supporting and connecting the first light source and the image acquisition element; The image acquisition support device includes an acquisition slide rail, an acquisition bracket, an acquisition connecting piece and an acquisition rotating piece; The acquisition slide rail is fixedly connected with the mounting base; The bottom of the acquisition bracket is slidably connected to the acquisition slide rail, the top of the acquisition bracket is connected with the acquisition connecting piece, and the acquisition connecting piece can be fixed at different heights of the acquisition bracket; The acquisition rotating piece is rotatably and fixedly connected to the acquisition connecting piece; The first light source or the image acquisition element is respectively detachably and fixedly connected to the acquisition rotating piece.

7. The defect detection method according to claim 6, characterized in that the image acquisition support device further includes an acquisition adjusting piece; The acquisition adjusting piece is detachably connected to the acquisition rotating piece; along a direction perpendicular to the rotation direction of the acquisition rotating piece, the acquisition adjusting piece can be fixed at different positions of the acquisition rotating piece. The first light source or the image acquisition element is respectively connected to the acquisition rotation element through the acquisition adjustment element.

8. The defect detection method according to any one of claims 1-5, characterized in that the first light source is a linear light source; the second light source is a laser; the image acquisition element is a line scan camera; the light of the second light source can be parallel to the surface of the product to be detected.

9. The defect detection method according to any one of claims 1-5, characterized in that it is applicable to a defect detection system, and the defect detection system includes the defect detection device, and further includes a chassis, a control device, a display device, a ventilation device and a warning device; the control device and the display device are both arranged on the chassis, and the control device is used to control the operation of the defect detection device; the display device is used to display the detection result of the defect detection device; the ventilation device and the warning device are both arranged outside the chassis; the ventilation device is used to exchange the air in the chassis; the warning device is used to display the working state of the defect detection device.

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