CN213121656U - Appearance inspection device and appearance inspection system - Google Patents

Abstract

The utility model provides an appearance inspection device, including the lighting device that can focus the device of shooing and adjustable wavelength and luminance, the device of shooing of can focusing the shooting end with lighting device's illumination end is towards an inspection area, the device of shooing of can focusing the shooting end avoids lighting device, the device of shooing of can focusing with lighting device is used for the electricity to connect photo processing center, the utility model also provides a pair of appearance inspection system, including an above-mentioned appearance inspection device, appearance inspection system still includes photo processing center, can focus the device of shooing with lighting device electricity connect in photo processing center reaches the purpose that improves whether qualified rate of accuracy of inspection article.

Description

Appearance inspection device and appearance inspection system

Technical Field

The utility model belongs to the technical field of the visual inspection, more specifically say, relate to a visual inspection device and visual inspection system.

Background

After the article is produced, the surface of the article needs to be inspected. If the surface of the object is detected to have defects, the object is unqualified. If the surface of the object is inspected to have no defects, the object is qualified. Typically, the blemishes include dirt, dust, scratches, oil stains, and the like. In the prior art, the surface of an object is usually inspected in a manual mode, and tiny flaws on the surface of the object are not easy to be inspected in a manual mode, so that the accuracy of judging whether the object is qualified is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an appearance inspection device to solve among the prior art with the judging that solves existence among the prior art and inspect whether qualified rate of accuracy is low technical problem.

In order to realize one of the above purposes, the utility model adopts the technical scheme that: the utility model provides an appearance inspection device is including the lighting device of the device of shooing of can focusing and adjustable wavelength and luminance, the shooting end of the device of shooing of can focusing with lighting device's illumination end orientation check area, the shooting end of the device of shooing of can focusing is avoided lighting device, the device of shooing of can focusing with lighting device is used for the electricity to connect photo processing center.

Further, the appearance inspection device further comprises a conveying device and a clamping device, the clamping device is provided with a clamping end portion and a fixing end portion, the clamping end portion of the clamping device is used for clamping an object to be inspected, the fixing end portion of the clamping device is fixed to the output end of the conveying device, the conveying device is used for driving the clamping device to drive the object to be inspected to move into the inspection area or to be far away from the inspection area, and the conveying device and the clamping device are kept away from the inspection area.

Furthermore, the clamping end of the clamping device is provided with a fixing plate with a through hole, or two elastic sheets which are oppositely arranged, or two output shafts of the finger cylinder.

Further, the lighting device is set as an annular light source or an annular square light source or a planar light source, and when the lighting device is set as the annular light source, the shooting end of the focusing photographing device faces the inner ring of the annular light source; when the lighting device is set as the annular square light source, the shooting end of the focusing photographing device faces the inner ring of the annular square light source.

Further, the focusing photographing device is set as a focusing camera or a fixed-focus camera mounted on an output shaft of the linear driving assembly.

Further, the linear driving assembly is set to be a Z-axis module or a cylinder.

Further, the focusing photographing device is set as a visual camera or an industrial camera.

Further, the appearance inspection device further comprises a linear driving mechanism, the illuminating device is fixed on an output shaft of the linear driving mechanism, the linear driving mechanism drives the illuminating device to be far away from or close to the inspection area, and the linear driving mechanism avoids the inspection area.

Further, the linear driving mechanism is set as an X-axis module or a Y-axis module.

The utility model provides a pair of visual inspection device's beneficial effect lies in: compared with the prior art, the method comprises the steps of placing an object to be inspected in an inspection area, adjusting the brightness and wavelength of an illuminating device according to prestored illumination data, illuminating the detected surface of the object to be inspected by the adjusted illuminating device, photographing the illuminated detected surface by a focusable photographing device to obtain photographing data, comparing the photographing data with image comparison data of the prestored illumination data, and if the photographing data is the same as the image comparison data, determining that the object to be inspected is qualified; if the photographing data is different from the image contrast data, the object to be inspected is unqualified. When the detected surface of the object to be inspected has tiny flaws, the difference between the photographing data and the image contrast data can be caused. The visual inspection device is simple in structure, whether the object to be inspected is qualified or not can be rapidly distinguished through comparison of the photographing data and the image comparison data, and the accuracy rate of whether the object to be inspected is qualified or not is improved. The photo processing center is convenient for rapidly comparing the photographing data with the image comparison data, the object to be checked does not need to be checked by eyes manually, and the speed and the accuracy of checking the object to be checked are improved. The method comprises the steps of photographing check points with different heights on a detected surface of an object to be checked through a focusing photographing device, and ensuring that clear images of each check point are obtained, so that whether flaws exist in each check point or not is determined.

The utility model discloses a second purpose lies in providing an appearance inspection system, for realizing second purpose, the utility model discloses a technical scheme be: an appearance inspection system comprises the appearance inspection device, and further comprises a photo processing center, wherein the focusing photographing device and the illuminating device are electrically connected to the photo processing center.

The utility model provides a pair of visual inspection system's beneficial effect lies in: compared with the prior art, the photo processing center is convenient for rapidly comparing the photographing data with the image comparison data, the object to be checked does not need to be checked by eyes manually and directly, and the speed and the accuracy of checking the object to be checked are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of an inspection apparatus according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 3 is a first schematic structural view of a clamping end of a clamping device of an inspection device according to an embodiment of the present invention;

fig. 4 is a second schematic structural view of a clamping end portion of a clamping device of an inspection device according to an embodiment of the present invention;

fig. 5 is a third schematic structural view of a clamping end portion of a clamping device of an inspection device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an inspection apparatus according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram three of an inspection apparatus according to an embodiment of the present invention;

fig. 8 is a first schematic flow chart of an appearance inspection apparatus according to an embodiment of the present invention;

fig. 9 is a schematic flow chart of an appearance inspection apparatus according to an embodiment of the present invention;

fig. 10 is a block diagram of an appearance inspection system according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a computer device according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a lens member according to an embodiment of the present invention;

fig. 13 is a cross-sectional view at B-B in fig. 12.

Wherein, in the figures, the respective reference numerals:

1. a graphic card device; 11. a monochrome graphic card; 12. an adjustment movement device; 13. a backlight device; 14. an illumination device; 2. an image sensing device; 3. a distance increasing device; 31. a distance-increasing mirror; 32. adjusting the movable device; 4. detecting a region; 5. a conveying device; 6. a clamping device; 61. clamping the end; 611. a fixing plate; 612. a through hole; 613. an elastic sheet; 614. a finger cylinder; 62. a fixed end portion; 7. a focus adjustable photographing device; 8. an illumination device; 9. an examination region; 101. selecting a module; 102. a data selection module; 103. pre-storing a selection module; 104. an illumination photographing module; 105. an image comparison module; 106. a reference selection module; 107. a detection point positioning module; 11a, a lens; 11b, a light through hole; 11c, a fixed seat; 11d, a detected surface; 11e, a first check point; 11f, a second checkpoint; 11g, third checkpoint.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 and fig. 2, an inspection apparatus according to the present invention will now be described. An inspection apparatus includes a card apparatus 1 and an image sensing apparatus 2;

the image card device 1 comprises a monochrome image card 11, wherein the monochrome image card 11 has a monochrome surface;

the acquisition end of the image sensing device 2 faces the monochromatic surface, the image sensing device 2 and the monochromatic graphic card 11 are arranged at intervals, a detection area 4 is arranged between the acquisition end of the image sensing device 2 and the monochromatic graphic card 11, and the detection area 4 is used for placing a lens piece.

A user places a lens piece in the detection area 4, controls the image sensing device 2, enables the acquisition end of the image sensing device 2 to acquire an inspection image of a single color surface through the current light through hole of the lens piece, and if no impurity image exists on the inspection image, the inspection image proves that no defect exists in the current light through hole of the lens piece; if the inspection image includes an image of foreign matter, it is verified that there is something wrong with the light-passing hole of the lens member at present. The inspection device has simple structure and low cost. Whether the corresponding lens piece is provided with the defective object or not is judged through the inspection image, the user does not need to directly observe the light through hole of the lens piece by eyes, and the efficiency of inspecting the light through hole of the lens piece is improved.

Specifically, the image card device 1 and the image sensing device 2 are disposed on a preset plane (not shown) which is set as a table top or an inner table top of a dust box.

In particular, the lens element is provided as a lens or a lens.

Specifically, the image sensing device 2 is set as an image sensing chip or an industrial camera. The image sensor device 2 is preferably electrically connected to a computing center (not shown) which comprises a memory, a processor and a computer program stored in the memory and executable on the processor. The calculation center stores a standard image of a single color surface, receives the inspection image and compares the inspection image with the standard image, if the inspection image is different from the standard image, the inspection image is proved to have a defective object in a light through hole of the lens piece corresponding to the inspection image, and the calculation center sends out reminding information; if the inspection image is the same as the standard image, the inspection image proves that no defect exists in the light through hole of the lens piece corresponding to the inspection image, and the calculation center does not send out reminding information.

Specifically, the foreign matter image is set as a spot image on the inspection image or/and a bar image on the inspection image.

Further, please refer to fig. 1 and fig. 2 together, as the utility model provides a specific implementation of an inspection apparatus, the inspection apparatus further includes distance-increasing device 3, distance-increasing device 3 includes distance-increasing mirror 31, distance-increasing mirror 31 sets up between monochromatic face and image sensing device 2, one end of distance-increasing mirror 31 is towards the collection end of image sensing device 2, the other end is towards the monochromatic face, detection area 4 is located between the collection end of distance-increasing mirror 31 and image sensing device 2.

After the lens element is placed in the detection area 4, the distance increasing lens 31 increases the focal length of the lens element, so that the acquisition end of the image sensing device 2 acquires an inspection image of a monochromatic surface through the current light through hole of the lens element and the distance increasing lens 31. The acquisition end of the image sensing device 2, the light through hole of the lens piece and the range extender 31 are matched to simulate to carry out far-focus shooting on a single-color surface, the distance between the single-color image card 11 and the acquisition end of the image sensing device 2 does not need to be set far, and the size of the inspection device is reduced.

Specifically, the pitch device 3 is disposed on a preset plane.

Further, please refer to fig. 1 and fig. 2, as the utility model provides a specific implementation of an inspection device, distance-increasing device 3 still includes adjusts mobile device 32, distance-increasing mirror 31 is fixed at the output of adjusting mobile device 32, adjust mobile device 32 and avoid detection area 4, adjust mobile device 32 and be used for driving distance-increasing mirror 31 and keep away from or be close to image sensing device 2's collection end, adjust mobile device 32 and do not influence the lens piece and place in detection area 4, conveniently adjust the distance between distance-increasing mirror 31 and the image sensing device 2, improve the convenience of using inspection device.

Specifically, the adjustment movement device 32 is fixed on a preset plane.

Optimally, the adjustment mechanism 32 is configured as an XYZ-axis adjustment mechanism or a Z-axis module.

Further, refer to fig. 1 and fig. 2, as the utility model provides a specific implementation of an inspection device, picture card device 1 still includes adjusts telecontrol equipment 12, monochromatic picture card 11 is fixed on the output of adjusting telecontrol equipment 12, it is used for driving monochromatic picture card 11 and keeps away from or be close to the collection end of image sensing device 2 to adjust telecontrol equipment 12, it avoids detection area 4 to adjust telecontrol equipment 12, it does not influence the lens piece and places in detection area 4 to adjust telecontrol equipment 12, conveniently adjust the distance between picture card device 1 and the image sensing device 2, improve the convenience of using inspection device.

In particular, the adjustment movement means 12 are fixed on a preset plane.

Optimally, the adjusting movement device 12 is configured as an XYZ-axis adjusting device or a Z-axis module.

Further, please refer to fig. 1 to 2, as a specific embodiment of the inspection apparatus provided by the present invention, the inspection apparatus further includes a conveying device 5 and a clamping device 6, the clamping device 6 has a clamping end 61 and a fixing end 62, the clamping end 61 of the clamping device 6 is used for clamping the lens, the fixing end 62 of the clamping device 6 is fixed on the output end of the conveying device 5, the conveying device 5 is used for driving the clamping device 6 to drive the lens to move to the detection area 4 or keep away from the detection area 4, and the conveying device 5 and the clamping device 6 avoid the detection area 4.

The conveying device 5 is convenient for controlling the clamping device 6 to move, and then the lens piece on the clamping end part 61 moves along with the movement of the clamping device 6, so that the lens piece can conveniently enter and exit the detection area 4, and the use convenience of the inspection device is improved.

By clamping the lens member by the clamping end 61, the clamping end 61 does not affect the image sensing device 2

In particular, the conveying device 5 is fixed on a preset plane.

The transport device 5 is preferably an XYZ-axis adjustment device or an X-axis module.

Further, please refer to fig. 1 and fig. 6, as a specific embodiment of the present invention, the conveying device 5 has a plurality of output ends, the clamping device 6 is provided with a plurality of clamping devices 6, each clamping device 6 corresponds to the output end of the conveying device 5 one by one, and the clamping device 6 is fixed on the output end of the corresponding conveying device 5.

When the lens member on one holding device 6 is in the detection area 4, the lens member on the other holding device 6 can be processed or the lens can be placed on the holding device 6 without the lens member, thereby improving the convenience of the inspection device.

Specifically, a plurality of output ends of the conveyor 5 are integrally provided, and in this case, the conveyor 5 is configured as a conveyor belt device.

Further, referring to fig. 2 to 5, as an embodiment of the present invention, the holding end 61 of the holding device 6 is a fixing plate 611 having a through hole 612, or two elastic pieces 613 disposed oppositely, or two output shafts of the finger cylinder 614.

When the lens is placed in the through hole 612, the lens is not easy to move on the fixing plate 611, and the lens is simple in structure and very practical; the distance between the two elastic pieces 613 is conveniently adjusted to hold lens pieces of different specifications. The finger cylinder 614 is convenient to use and facilitates clamping and releasing the lens piece.

Further, please refer to fig. 1 and fig. 2, as a specific embodiment of the present invention, the card device 1 further includes a backlight device 13 with adjustable brightness, the monochrome card 11 is set as a transparent card, the monochrome surface of the monochrome card 11 is set as a monochrome transparent plane, the backlight device 13 is disposed on a side of the monochrome card 11 facing away from the monochrome surface, and the light emitting side of the backlight device 13 faces the monochrome card 11.

The light emitted from the backlight device 13 passes through the light-transmitting graphic card, so that the image sensing device 2 can acquire a clear inspection image. The brightness of the backlight device 13 is adjusted according to the lens pieces with different specifications, so that the image sensing device 2 can acquire clear inspection images through the lens pieces with different specifications. The brightness of the backlight device 13 is kept unchanged, so that a user can conveniently check the lens piece with the same specification, and the difficulty of using the checking device is reduced.

Further, as the utility model provides a specific implementation mode of an inspection device, monochromatic picture card 11 is fixed on backlight unit 13, reduces the volume of picture card device 1, is convenient for move monochromatic picture card 11 and backlight unit 13 simultaneously.

Specifically, the backlight 13 may be fixed on an output shaft of the adjustment movement device 12.

Further, please refer to fig. 6, as a specific implementation manner of the inspection apparatus provided by the present invention, the card apparatus 1 further includes a lighting device 14 with adjustable brightness, the monochrome card 11 is set as an opaque card, the monochrome surface of the monochrome card 11 is set as a monochrome opaque plane, the lighting device 14 is used for illuminating the monochrome opaque plane, and the lighting device 14 is located on one side of the inspection area 4.

The light emitted by the illuminating element 14 is irradiated on the opaque picture card, so that the image sensing device 2 can acquire a clear inspection image conveniently. The brightness of the illuminating part 14 is adjusted according to the lens parts with different specifications, so that the image sensing device 2 can obtain clear inspection images through the lens parts with different specifications. The brightness of the illuminating piece 14 is kept unchanged, so that a user can conveniently inspect the lens piece with the same specification, and the difficulty of using the inspection device is reduced.

In particular, the illumination member 14 and the opaque chart are fixed to the output shaft of the adjustment movement device 12.

Further, as a specific implementation of the present invention provides an inspection apparatus, the monochrome surface is set to be a black plane or a white plane, and the background of the inspection image is black or white, so as to be convenient for rapidly identifying whether the inspection image is different from the standard image.

Referring to fig. 1, 6 and 7 together, an appearance inspection apparatus according to the present invention will now be described. The appearance inspection device comprises a focusing photographing device 7 and an illuminating device 8 capable of adjusting wavelength and brightness, wherein a photographing end of the focusing photographing device 7 and an illuminating end of the illuminating device 8 face an inspection area 9, a photographing end of the focusing photographing device 7 avoids the illuminating device 8, and the focusing photographing device 7 and the illuminating device 8 are electrically connected with a photo processing center.

Placing an object to be inspected in an inspection area 9, adjusting the brightness and wavelength of an illuminating device 8 according to prestored illumination data, illuminating the detected surface of the object to be inspected by the adjusted illuminating device 8, then photographing the illuminated detected surface by a focusable photographing device 7 to obtain photographing data, comparing the photographing data with image comparison data of the prestored illumination data, and if the photographing data is the same as the image comparison data, determining that the object to be inspected is qualified; if the photographing data is different from the image contrast data, the object to be inspected is unqualified. When the detected surface of the object to be inspected has tiny flaws, the difference between the photographing data and the image contrast data can be caused. The visual inspection device is simple in structure, whether the object to be inspected is qualified or not can be rapidly distinguished through comparison of the photographing data and the image comparison data, and the accuracy rate of whether the object to be inspected is qualified or not is improved. The photo processing center is convenient for rapidly comparing the photographing data with the image comparison data, the object to be checked does not need to be checked by eyes manually, and the speed and the accuracy of checking the object to be checked are improved. The check points with different heights on the detected surface of the object to be checked are photographed through the focusing photographing device 7, so that clear images of each check point are guaranteed to be obtained, and whether flaws exist at each check point is determined.

Specifically, the focus-adjustable photographing device 7 is set as a focus-adjustable camera or a fixed-focus camera mounted on an output shaft of the linear driving assembly. And the linear driving assembly drives the fixed-focus camera to focus with the object to be inspected. The focusing camera adjusts the focal length between the focusing camera and an object to be inspected through a focusing lens of the focusing camera.

Optimally, the linear driving assembly is set to be a Z-axis module or an air cylinder, the Z-axis module plays a role in accurately adjusting the fixed-focus camera, and the air cylinder is low in cost.

Specifically, the focus-adjustable photographing device 7 and the illumination device 8 are disposed on a preset plane.

Specifically, the image contrast data is set as a contrast picture, and the photographing data is set as a photographing picture.

Specifically, the object to be inspected is set as a lens piece or a mobile phone case or a mobile phone screen.

Further, please refer to fig. 1 and fig. 2, as a specific embodiment of the appearance inspection apparatus provided by the present invention, the appearance inspection apparatus further includes a conveying apparatus 5 and a clamping apparatus 6, the clamping apparatus 6 has a clamping end 61 and a fixing end 62, the clamping end 61 of the clamping apparatus 6 is used for clamping the object to be inspected, the fixing end 62 of the clamping apparatus 6 is fixed on the output end of the conveying apparatus 5, the conveying apparatus 5 is used for driving the clamping apparatus 6 to drive the object to be inspected to move into the inspection area 9 or keep away from the inspection area 9, the conveying apparatus 5 and the clamping apparatus 6 avoid the inspection area 9, the convenience of moving the object to be inspected is improved, the object to be inspected is conveniently clamped on the clamping apparatus 6, and the object to be inspected is detached from the clamping apparatus 6.

Specifically, the conveying device 5 of the appearance inspection device is common to the conveying device 5 of the inspection device described above, that is, the conveying device 5 conveys the lens pieces into the detection area 4 and the inspection area 9, respectively.

Further, referring to fig. 3 to 5, as an embodiment of the appearance inspection apparatus of the present invention, the holding end 61 of the holding device 6 is a fixing plate 611 having a through hole 612, or two elastic pieces 613 disposed oppositely, or two output shafts of the finger cylinder 614.

The fixing plate 611 is convenient for placing a circular object to be inspected in the through hole 612, and the distance between the two elastic pieces 613 is adjustable, so that objects to be inspected with different sizes can be conveniently clamped. The finger cylinder 614 is convenient to use, and the convenience of clamping and releasing the object to be checked is improved.

Further, please refer to fig. 1, fig. 6 and fig. 7 together, as a specific embodiment of the appearance inspection apparatus provided by the present invention, the lighting device 8 is set as an annular light source or an annular square light source or a planar light source, when the lighting device 8 is set as an annular light source, the shooting end of the focus-adjustable shooting device 7 faces the inner ring of the annular light source; when the lighting device 8 is set as an annular square light source, the shooting end of the focusable shooting device 7 faces the inner circle of the annular square light source.

The annular light source and the annular square light source can perform low-angle irradiation, and the focusing photographing device 7 can photograph tiny flaws conveniently. The shooting end of the focusing shooting device 7 faces towards the inner ring of the annular light source or the inner ring of the annular square light source, so that light reflected by an object to be checked can enter the shooting device conveniently, and clear pictures can be shot by the focusing shooting device 7. The plane light source is convenient to install. The cost is low, and the cost of the appearance inspection device is favorably reduced.

Further, as the utility model provides a pair of a concrete implementation of visual inspection device, can focus the device 7 of shooing and establish to vision camera or industry camera, the resolution ratio of vision camera is high, and the photo of shooing is difficult for the distortion. The industrial camera is convenient for installing different lenses.

Further, please refer to fig. 1, fig. 6 and fig. 7 together, as a specific embodiment of the present invention, the appearance inspection apparatus further includes a linear driving mechanism (not shown), the lighting device 8 is fixed on the output shaft of the linear driving mechanism, the linear driving mechanism drives the lighting device 8 to be far away from or close to the inspection area 9, the linear driving mechanism avoids the inspection area 9, the distance between the lighting device 8 and the inspection area 9 can be adjusted according to the size of the object to be inspected, so as to improve the convenience of the appearance inspection apparatus.

Further, as the utility model provides a pair of a concrete implementation of visual inspection device, sharp actuating mechanism establishes to X axle module or Y axle module, and the precision of X axle module and Y axle module is high, is convenient for finely tune the distance between lighting device 8 and the inspection area 9.

The utility model provides an appearance inspection system, an appearance inspection system include foretell appearance inspection device, and appearance inspection system still includes photo processing center (not shown in the figure), and the device of can focusing 7 and the 8 electricity of lighting device are connected in photo processing center.

The photo processing center is convenient for rapidly comparing the photographing data with the image comparison data, the object to be checked does not need to be checked by eyes manually, and the speed and the accuracy of checking the object to be checked are improved.

Referring to fig. 8, a method for inspecting appearance according to the present invention will now be described. The appearance inspection method comprises the following steps:

s1-1: selecting an object to be checked;

s1-2: selecting a plurality of pre-stored illumination data according to the object to be checked, wherein each pre-stored illumination data comprises wavelength data, brightness data, focal length data and image contrast data;

s1-3: selecting one pre-stored lighting data;

s1-4: controlling an illuminating device of an appearance inspection system to illuminate the inspected surface of the object to be inspected according to the current wavelength data and the current brightness data, and controlling a focus-adjustable photographing device of the appearance inspection system to photograph the inspected surface according to the focal length data to obtain photographing data;

s1-5: judging whether the current photographing data is the same as the current image contrast data or not, if so, returning to execute the step S1-3 until all the pre-stored lighting data are selected; and if the current photographing data is different from the current image contrast data, the object to be inspected is unqualified.

Through the steps S1-1 to S1-5, whether the inspected surface of the object to be inspected has flaws or not is judged, so that whether the object to be inspected is qualified or not is judged, and the speed of inspecting the object to be inspected is improved. Under the same wavelength data, focal length data and brightness data, the qualified photographing data corresponding to the object to be inspected must be consistent with the image contrast data. If the photographing data and the image contrast data are inconsistent under the same wavelength data, focal length data and brightness data, it is proved that the inspected surface of the object to be inspected has flaws, the object to be inspected is regarded as a defective product, and the object to be inspected is not suitable for leaving a factory.

Specifically, a plurality of objects to be inspected are provided, and each object to be inspected is inspected through the steps S1-1 to S1-5.

Specifically, a plurality of pre-stored illumination data are selected according to the object to be inspected, and each pre-stored illumination data corresponds to the inspection point with different heights on the object to be inspected.

Specifically, controlling the focus-adjustable photographing device according to the focal length data may be understood as adjusting a focal length between the focus-adjustable photographing device and the inspected surface according to the focal length data.

Further, referring to fig. 9, as a specific implementation manner of the appearance inspection method provided by the present invention, before the step S1-2, the method further includes the following steps:

s2-1: selecting a standard reference object according to the object to be checked;

s2-2: determining a plurality of detection points on the detected surface of the standard reference object according to a plurality of detection points on the detected surface of the object to be detected, wherein each detection point corresponds to each detection point one by one;

s2-3: selecting a detection point;

s2-4: adjusting the wavelength and the brightness of the illuminating device to illuminate one detection point, and simultaneously controlling the focal distance between the focusing photographing device and the current detection point to photograph so as to obtain a corresponding real-time image;

s2-5: judging whether the current real-time image is the clearest image, if so, recording the current real-time image as the image contrast data, simultaneously recording the focal length data, the wavelength data and the brightness data of the current focusing photographing device corresponding to the current real-time image, forming the current prestored lighting data by the current focal length data, the current image contrast data, the current wavelength data and the current brightness data, and returning to execute the step S2-3 until the detection point is confirmed to be selected; and if the current real-time image is not the clearest image, returning to the step of 2-4.

Several pre-stored illumination data are determined through the steps S2-1 to S2-5, so as to facilitate the inspection of the object to be inspected.

Specifically, the standard reference object is set as an object without defects, and if the object to be inspected is a lens piece, the standard reference object is set as a lens piece without defects; if the object to be inspected is the mobile phone shell, the standard reference object is set as the mobile phone shell without defects.

Further, as a specific embodiment of the visual inspection method provided by the present invention, step S2-5 is set as follows:

judging whether an electric signal corresponding to the current real-time image is in a threshold value or not through the focusing photographing device, if so, recording the current real-time image as image comparison data, simultaneously recording the focal length data, the wavelength data and the brightness data of the current focusing photographing device corresponding to the current real-time image, forming current prestored lighting data through the current focal length data, the current image comparison data, the current wavelength data and the current brightness data, and returning to execute the step S2-3 until the detection point is confirmed to be selected; and if the current real-time image is not the clearest image, returning to the step of 2-4.

When the real-time image is clearest, the electric signal of the image sensor of the focusing photographing device reaches a threshold value. When the focusing photographing device photographs without changing the focal length, the wavelength condition and the brightness condition are changed, the electric signal generated by the focusing photographing device changes in a distribution function, the distribution function changes in a wave crest, and when the electric signal reaches a threshold value, the electric signal is in the position of the wave crest. Or when the focusing photographing device photographs without changing the wavelength, the focal length condition and the brightness condition are changed, the electric signal generated by the focusing photographing device changes in a distribution function, the distribution function changes in a wave crest, and when the electric signal reaches a threshold value, the electric signal is in the wave crest position. Or when the focusable photographing device photographs without changing the brightness, the focal length condition and the wavelength condition are changed, the electric signal generated by the focusable photographing device changes in a distribution function, the distribution function changes in a wave crest, and when the electric signal reaches a threshold value, the electric signal is positioned at the wave crest position

Specifically, step S2-4 is set to: selecting the wavelength of an illuminating device according to the material of an object to be inspected, keeping the wavelength of the illuminating device unchanged, adjusting the brightness of the illuminating device to illuminate a detection point, and simultaneously controlling the focal length of the focusing photographing device to photograph the current detection point to obtain a corresponding real-time image.

Specifically, the real-time image is obtained under the illumination with the same wavelength, so that whether the electric signal corresponding to the real-time image reaches the threshold value or not is rapidly confirmed under the condition of the same wavelength, and the pre-stored illumination data corresponding to each detection point is obtained.

Further, as a specific embodiment of the visual inspection method provided by the present invention, step S1-5 is set as follows:

judging whether the current photographing data is the same as the current image contrast data or not through an image contrast system, if so, returning to execute the step S1-3 until all the pre-stored lighting data are selected; and if the current photographing data is different from the current image comparison data, the appearance inspection system outputs that the object to be inspected is unqualified.

The image contrast system is convenient for rapidly comparing the photographing data with the image contrast data, the object to be checked does not need to be checked by eyes manually and directly, and the speed and the accuracy of checking the object to be checked are improved.

Specifically, the image contrast system is the same as the photo processing center of the appearance inspection system described above.

Referring to fig. 10, the present invention further provides an appearance inspection system, including:

a selection module 101 for selecting an object to be inspected;

the data selection module 102 is used for selecting a plurality of pre-stored illumination data according to the object to be checked, wherein each pre-stored illumination data comprises wavelength data, brightness data, focal length data and image contrast data;

a pre-storing selection module 103, which selects one of the pre-stored lighting data;

the illumination photographing module 104 is used for controlling an illumination device of an appearance inspection system to illuminate the inspected surface of the object to be inspected according to the current wavelength data and the current brightness data, and controlling a focus-adjustable photographing device of the appearance inspection system to photograph the inspected surface according to the focal length data to obtain photographing data;

the image comparison module 105 is configured to determine whether the current photographing data is the same as the current image comparison data, and if the current photographing data is the same as the current image comparison data, return to the step of selecting one of the pre-stored lighting data until all of the pre-stored lighting data are selected; and if the current photographing data is different from the current image contrast data, the object to be inspected is unqualified.

Further, referring to fig. 10, as a specific implementation manner of the appearance inspection system provided by the present invention, the appearance inspection system further includes:

a reference selection module 106 for selecting a standard reference object according to the object to be checked;

a detection point positioning module 107, configured to determine a plurality of detection points on the detected surface of the standard reference object according to a plurality of detection points on the detected surface of the object to be detected, where each detection point corresponds to each detection point;

a detection point selection module 108 for selecting one of the detection points;

the real-time image acquisition module 109 is used for adjusting the wavelength and the brightness of the lighting device to light one detection point, and simultaneously controlling the focal distance between the focusing photographing device and the current detection point to photograph so as to obtain a corresponding real-time image;

a clearest image recognition module 1010, configured to determine whether the current real-time image is a clearest image, record the current real-time image as the image contrast data if the current real-time image is the clearest image, record the focal length data of the current focus-adjustable photographing device, the wavelength data of the current lighting device, and the brightness data corresponding to the current real-time image, form the current pre-stored lighting data according to the current focal length data, the current image contrast data, the current wavelength data, and the current brightness data, and return to the step of selecting one of the detection points until it is determined that the detection point is selected; and if the current real-time image is not the clearest image, returning to the step of executing the step of adjusting the wavelength and the brightness of the lighting device to light one detection point, and controlling the focusing photographing device to photograph the current detection point to obtain the corresponding real-time image.

Further, as a specific implementation manner of the present invention, the clearest image recognition module 1010 is set as: judging whether an electric signal corresponding to the current real-time image is in a threshold value or not through the focusing photographing device, if so, recording the current real-time image as image comparison data, simultaneously recording the focal length data, the wavelength data and the brightness data of the current focusing photographing device corresponding to the current real-time image, forming current prestored lighting data through the current focal length data, the current image comparison data, the current wavelength data and the current brightness data, and returning to execute the step of selecting one detection point until the detection point is confirmed to be selected; and if the current real-time image is not the clearest image, returning to the step of executing the step of adjusting the wavelength and the brightness of the lighting device to light one detection point, and controlling the focusing photographing device to photograph the current detection point to obtain the corresponding real-time image.

Further, as a specific embodiment of the present invention, the image comparison module 105 is configured to: judging whether the current photographing data is the same as the current image contrast data or not through an image contrast system, if so, returning to the step of selecting one pre-stored lighting data by the appearance inspection system until all the pre-stored lighting data are selected; and if the current photographing data is different from the current image comparison data, the appearance inspection system outputs that the object to be inspected is unqualified.

For a specific limitation of the visual inspection system, reference may be made to the above-mentioned limitation of a visual inspection method, which is not described herein again. The various modules in an appearance inspection system described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor of a computer device, and can also be stored in a storage in the computer in a software form, so that the processor can call and execute the modules.

Referring to fig. 11, the present invention further provides a computer device, which includes a memory, a processor and a computer program stored in the memory and operable on the processor, wherein the processor executes the computer program to implement the steps of the appearance inspection method, such as steps S1-1 to S1-5 shown in fig. 9, or the computer program implements the functions of the modules of the inspection apparatus, such as the functions of modules 105 to 1010 shown in fig. 10, when executed by the processor. To avoid repetition, further description is omitted here.

Referring to fig. 11, the present invention further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the visual inspection method. Such as steps S1-1 to S1-5 shown in fig. 9, or the computer program is executed by a processor to implement the functions of the respective modules of the above-described inspection apparatus, such as the functions of the modules 105 to 1010 shown in fig. 10. To avoid repetition, further description is omitted here.

It will be understood by those skilled in the art that all or part of the processes of implementing an appearance inspection method described above can be implemented by quality-related hardware through a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the method as described in the above embodiment ten. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. The non-volatile memory may include read only memory, programmable ROM, electrically erasable programmable ROM, or flash memory. Volatile memory may include random access memory or external cache memory IQ. Random access memory is available in a variety of forms such as, without limitation, static RAM, dynamic RAM, synchronous DRAM, double data rate SDRAM, enhanced SDRAM, synchronous DRAM, memory bus, direct RAM, direct memory bus dynamic RAM, and memory bus dynamic RAM.

Further, referring to fig. 12 and 13, the lens element according to the present invention is described, where the lens element includes a lens 11a and a fixing base 11c, the lens 11a is embedded in the fixing base 11c, a light-passing area of the lens 11a is a light-passing hole 11b, a detected surface 11d is disposed on an end surface of the fixing base 11c, the detection points include a first detection point 11e, a second detection point 11f, and a third detection point 11g, centers of the first detection point 11e, the second detection point 11f, and the third detection point 11g are located on a straight line, and the first detection point 11e, the second detection point 11f, and the third detection point 11g sequentially approach the lens 11a from an outer edge of the end surface of the fixing base 11 c. The first checkpoint 11e, the second checkpoint 11f and the third checkpoint 11g differ in height. The lens member can be inspected by using the above-described inspection apparatus, appearance inspection system, and appearance inspection method.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides an appearance inspection device, its characterized in that, is including the focusing lighting device who shoots the device and adjustable wavelength and luminance, the focusing shoot the device the shoot end with lighting device's illumination end orientation check area, the focusing shoot the device the shoot end avoid lighting device, the focusing shoot the device with lighting device is used for the electricity to connect photo processing center.

2. The visual inspection apparatus of claim 1, further comprising a conveying device and a holding device, wherein the holding device has a holding end and a fixing end, the holding end of the holding device is used for holding the object to be inspected, the fixing end of the holding device is fixed on the output end of the conveying device, the conveying device is used for driving the holding device to move the object to be inspected into the inspection area or away from the inspection area, and the conveying device and the holding device avoid the inspection area.

3. The visual inspection device of claim 2, wherein the holding end of the holding device is a fixed plate having a through hole, two elastic pieces disposed opposite to each other, or two output shafts of the finger cylinder.

4. The visual inspection apparatus according to claim 1, wherein said illumination means is provided as an annular light source or an annular square light source or a planar light source, and when said illumination means is provided as said annular light source, a photographing end of said focus-adjustable photographing means faces an inner circumference of said annular light source; when the lighting device is set as the annular square light source, the shooting end of the focusing photographing device faces the inner ring of the annular square light source.

5. The visual inspection apparatus of claim 1, wherein said focus-adjustable photographing means is configured as a focus-adjustable camera or a fixed focus camera mounted on an output shaft of the linear driving assembly.

6. The visual inspection apparatus of claim 5, wherein said linear drive assembly is configured as a Z-axis module or a pneumatic cylinder.

7. The visual inspection apparatus of claim 6, wherein said focusing means is a vision camera or an industrial camera.

8. The visual inspection apparatus of claim 4, further comprising a linear drive mechanism, said illumination device being secured to an output shaft of said linear drive mechanism, said linear drive mechanism driving said illumination device away from or toward said inspection area, said linear drive mechanism avoiding said inspection area.

9. The visual inspection apparatus of claim 8, wherein the linear drive mechanism is configured as an X-axis module or a Y-axis module.

10. An appearance inspection system comprising an appearance inspection apparatus according to any one of claims 1 to 9, said appearance inspection system further comprising a photo processing center, said focusable photographing apparatus and said illumination apparatus being electrically connected to said photo processing center.

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