Visual identification system and multistage screening visual selector

Abstract

The utility model discloses a visual identification system and a multistage screening visual selector, and the visual identification system comprises an image obtaining device and a lens assembly. The lens assembly comprises at least one reflecting lens unit, and the at least one reflecting lens unit is adjacent to each column of materials conveyed by the conveying belt and is obliquely and upwards arranged in the space, so that when the materials pass through the reflecting lens units, the materials are imaged on the reflecting lens units; the image acquisition equipment comprises first image acquisition equipment, and the first image acquisition equipment is used for simultaneously shooting the material and the reflecting lens unit so as to directly acquire an image reflecting the surface characteristics of the material and indirectly acquire an image reflecting the surface characteristics of the material through an image in the reflecting lens unit. The shooting visual angle of the first image acquisition equipment is increased through the reflection lens unit so as to increase the range of the first image acquisition equipment capable of acquiring the surface characteristics of the material.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of screening and classifying, especially to a visual identification system for identifying materials and a multi-stage screening and visual selection machine for screening materials. BACKGROUND

[0002] The screening and visual selection machine for screening materials (such as nuts, fruits, etc.) in the prior art usually comprises a conveying platform, a visual identification system, and a rejection mechanism; the conveying platform comprises a conveying belt for conveying materials and conveying rollers for supporting and driving the conveying belt; the image acquisition device in the visual identification system (the core component of the image acquisition device is a camera or a video camera, and the image acquisition device further comprises auxiliary components such as a backlight panel and a light source) is used to take pictures of the materials on the conveying belt to obtain images reflecting the surface features (including shape features, surface quality, color features, etc.) of the materials; the image processing and analysis system in the visual identification system (such as an image processing and analysis program installed in a computer) is used to process and analyze the obtained images and finally divide the materials into different grades according to the surface features; the rejection mechanism separates the materials of the same grade from other materials by changing the conveying track of the materials; and the material collecting mechanism is used to collect the materials of the same grade.

[0003] The visual identification system of the conventional multi-stage screening and visual selection machine usually only comprises a single set of image acquisition device. As can be easily understood, due to the limitations of the camera and the video camera in terms of the range and capability of taking pictures and the shape features of the materials (such as spherical materials or spherical-like materials), it is difficult to obtain more comprehensive surface feature information of the materials by using a single set of image acquisition device.

[0004] In order to obtain more comprehensive surface feature information of the materials, the prior art attempts to configure multiple sets of image acquisition devices to take pictures of the materials from different angles to obtain more comprehensive surface feature information of the materials. However, this method of obtaining more comprehensive surface image features of the materials by using multiple sets of image acquisition devices has the following problems:

[0005] 1. Each set of image acquisition device occupies a certain installation space due to the presence of components such as cameras (video cameras), backlight panels, light sources, and control modules. Therefore, multiple sets of image acquisition devices are difficult to obtain sufficient installation space, and the installation is greatly limited or even impossible.

[0006] 2. Even if multiple sets of image acquisition devices can be installed in limited space, the light emitted by the light sources in different image acquisition devices may interfere with each other, affecting the shooting effect, so that the obtained images are difficult to clearly and accurately reflect the surface features of the materials.

[0007] 3. As can be easily understood, the addition of multiple sets of image acquisition devices will inevitably increase the cost. The utility model discloses a kind of visual identification systems and multi-stage screening visual selection machine to solve the problems in the prior art.

[0008] In view of the above problems existing in the prior art, the utility model aims to provide a visual identification system and a multi-stage screening visual selection machine to solve the problems in the prior art.

[0009] To achieve the above object, the utility model adopts the following scheme.

[0010] A visual identification system comprises an image acquisition device and a lens assembly.

[0011] The lens assembly comprises at least one reflecting lens unit, and each of the at least one reflecting lens unit is adjacent to each column of materials conveyed by a conveying belt and is arranged in space with an upward inclination, so that the materials are imaged on the reflecting lens unit when the materials pass through the reflecting lens unit.

[0012] The image acquisition device comprises a first image acquisition device, which simultaneously photographs the materials and the reflecting lens unit to directly acquire images reflecting the surface features of the materials and indirectly acquire images reflecting the surface features of the materials through the reflecting lens unit, so that the photographing angle of the first image acquisition device is increased by the reflecting lens unit to increase the range of the surface features of the materials that can be acquired by the first image acquisition device.

[0013] Preferably, the first image acquisition device is located above the conveying belt.

[0014] Preferably, at least one reflecting lens unit is arranged on each side of each column of materials.

[0015] Preferably, a plurality of reflecting lens units are arranged on each side of each column of materials, and the plurality of reflecting lens units on each side of each column of materials are arranged in a circumferential direction.

[0016] Preferably, the spatial posture and position of each reflecting lens unit on each side of each column of materials are adjustable.

[0017] Preferably, the plurality of reflecting lens units on each side of each column of materials are sequentially hinged by a spherical hinge assembly, so that the spatial posture and position of the reflecting lens units are adjustable.

[0018] Preferably, the mirror surface of the reflecting lens unit is a plane.

[0019] Preferably, the mirror surface of the reflecting lens unit is a convex surface.

[0020] Preferably, the image acquisition device further comprises a second image acquisition device, which is located below the conveying belt, and the conveying belt is configured to be transparent.

[0021] The second image acquisition device photographs the material from below via the conveyor belt to obtain an image of the surface features of the material.

[0022] Preferably, the image acquisition device comprises a video camera or a still camera.

[0023] The utility model discloses a multi -stage screening visual selection machine, including, conveying platform, rejecting system, material collecting mechanism, still include above -mentioned visual identification system.

[0024] Compared with the prior art, the visual identification system and the multi -stage screening visual selection machine provided by the utility model have the advantages that:

[0025] 1, utilize the mirror piece unit to the material and carry out imaging, utilize single set image acquisition device to material and the mirror piece unit photograph one aspect can increase the range of view another aspect can reduce the low latitude area of material in the image distortion, thereby make visual identification system more comprehensive, accurate acquisition material's surface features.

[0026] 2, through increasing the arrangement quantity of mirror piece unit, the surface features of material can be obtained from more visual angle, compared with the scheme that the number of image acquisition device is increased to increase the visual angle, the utility model avoids the problem that the equipment is difficult to install due to insufficient installation space, the problem that numerous light sources interfere with each other and the problem of cost increase.

[0027] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory in nature and are not intended to limit the present utility model.

[0028] The foregoing summary of various implementations or examples of the technology described in the utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0029] In the drawings, which are not necessarily drawn to scale, like numerals can describe similar components in different views. Like numerals having different letter suffixes can represent different instances of similar components. The drawings illustrate generally, by way of example, various embodiments of the present utility model and are not intended to limit the present utility model in any way. The same or similar reference numerals in all figures can represent similar parts. Such embodiments are illustrative, and not intended to be exhaustive or limiting of the present utility model. The embodiments are not meant to be exhaustive or limiting in any way.

[0030] Figure 1 It is a perspective view of the multi -stage screening visual selection machine provided by the utility model.

[0031] Figure 2 It is a perspective view of the multi -stage screening visual selection machine provided by the utility model. Figure 1 It is an enlarged view of the partial A.

[0032] Figure 3 The front view of the visual identification system provided by the utility model.

[0033] Figure 4 The plan view of the visual identification system provided by the utility model.

[0034] In the figure:

[0035] 10-conveying platform; 11-conveying belt; 211-first image acquisition device; 2111-first camera; 212-second image acquisition device; 2121-second camera; 22-lens assembly; 221-reflective lens unit; 30-rejection mechanism; 40-receiving mechanism; 100-material; 101-low latitude area; 102-pit. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly and completely below in combination with the drawings of the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0037] Unless otherwise defined, the technical terms or scientific terms used in the utility model should be understood as the usual meaning by those skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, which may change accordingly when the absolute position of the described object changes.

[0038] In order to keep the following description of the embodiments of the utility model clear and simple, the utility model omits the detailed description of known functions and known components.

[0039] As shown in Figures 1 to 4 The utility model discloses a kind of visual identification system and multi-stage screening visual selection machine comprising the visual identification system, as shown in Figure 1As shown, the multi-stage screening visual sorter comprises the visual recognition system, a conveying platform 10, a rejection mechanism 30 and a material collecting mechanism 40. The visual recognition system disclosed in the utility model is dedicated to more comprehensively, clearly and accurately obtaining the surface feature information (the surface features include but are not limited to: shape features, surface quality, color features) of the spherical or spherical-like material 100, so that the image analysis and processing program (the program is installed in the computer system) in the visual recognition system can realize the accurate classification of the material 100 (for example, the excellent grade).

[0040] The conveying platform 10 comprises a platform body, conveying rollers installed on the platform body and conveying belts 11 installed on the conveying rollers. The conveying belts 11 can comprise a plurality of conveying belts 11, and the conveying belts 11 in each column are arranged in parallel and can be responsible for conveying one or more columns of materials 100. In the utility model, the conveying belts 11 are preferably configured in a transparent state so that the visual recognition system can also obtain the surface feature information of the material 100 from the bottom of the conveying belts 11 via the conveying belts 11.

[0041] The visual recognition system and the rejection mechanism 30 are arranged in sequence along the direction in which the material 100 is conveyed on the conveying belts 11, and the material collecting mechanisms 40 are arranged on both sides of the rejection mechanism 30. When the material 100 on the conveying belts 11 passes through the visual recognition system, the image acquisition device (the core component is a camera or a video camera, and the auxiliary equipment includes a back light plate, a light source and the like) in the visual recognition system photographs the material 100 to obtain the image reflecting the surface features of the material 100. Then, the image analysis and processing program in the visual recognition system obtains the image reflecting the surface features of the material 100 and classifies the corresponding material 100 based on the surface feature information of the material 100 reflected by the image. The material 100 classified by the grade is changed in the conveying track by the rejection mechanism 30 when the material 100 passes through the rejection mechanism 30, and then is received by the corresponding material collecting mechanism 40, so as to realize the screening and receiving of the material 100 according to the grade.

[0042] Since the image analysis and processing program classifies the material 100 by analyzing the surface features of the material 100 reflected in the image, whether the image obtained by the image acquisition device can more comprehensively and accurately reflect the surface features of the material 100 determines the screening effect of the visual sorter.

[0043] The image acquired by using a single set of image acquisition devices is difficult to comprehensively and accurately reflect the surface features of the material 100. Specifically, the reason why the image is difficult to comprehensively reflect the surface features of the material 100 is that the surface of the material 100 facing away from the camera (or the video camera) cannot be captured by the camera, so that the surface features of the back of the material 100 cannot be presented in the image. The image is difficult to accurately reflect the surface features of the material 100, which is specifically manifested in that the surface of the low-latitude area 101 of the material 100 cannot be presented in the image in proportion, and the surface of this area is compressed in the image. If there are defects such as cracks and notches in the low-latitude area 101, the defects are not easy to be identified in the image. In other words, the single set of image acquisition devices has the defects of small stereoscopic view range and image distortion of the low-latitude area 101 in acquiring the image of the material 100. However, using multiple sets of image acquisition devices to shoot the material 100 from different angles also has problems such as insufficient installation space, mutual interference between light rays, high cost, etc.

[0044] In the utility model, as shown in the drawings, Figures 2 to 4 The means for expanding the view range and reducing the distortion of the low-latitude area 101 of the material 100 by adding the lens assembly 22 in the adjacent area of the material 100 is used instead of the means for expanding the view range and reducing the distortion of the low-latitude area 101 of the material 100 by increasing the number of image acquisition devices. Specifically, the first image acquisition device 211 is arranged above the conveying belt 11, the second image acquisition device 212 is arranged below the conveying belt 11, the conveying belt 11 is configured in a transparent state, the lens assembly 22 comprises at least one reflecting lens unit 221, the first image acquisition device 211 is used for shooting the material 100 from above the material 100 by means of the first camera 2111 and auxiliary components (such as a back light plate, a light source, etc., not shown in the drawings), and the second image acquisition device 212 is used for shooting the material 100 from below the material 100 by means of the second camera 2121 and auxiliary components (such as a back light plate, a light source, etc., not shown in the drawings) through the conveying belt 11. The reflecting lens unit 221 is arranged adjacent to the material 100 and is arranged in space in an inclined manner. The arrangement position and spatial attitude of the reflecting lens unit 221 should at least meet the following requirements: the low-latitude area 101 of the material 100 corresponding to the angle (or the viewing angle) at which the reflecting lens unit 221 is located should be able to form an image with a smaller distortion in the reflecting lens unit 221, and the high-latitude area of the material 100 (i.e., the top and bottom areas of the material 100) can not necessarily form an image in the reflecting lens unit 221 or the formed image is allowed to be distorted (because the top and bottom areas of the material 100 acquired by directly shooting the material 100 by using the first camera 2111 of the first image acquisition device 211 and the second camera 2121 of the second image acquisition device 212 are not distorted images).

[0045] It should be noted that althoughFigure 3 The position of the first camera 2111 shown is a position directly above the material 100, however, this should not be understood as a limitation on the relative position of the first camera 2111 and the material 100, in fact, the first image acquisition device 2111 can be arranged at any position allowed by the installation space and capable of simultaneously shooting the material 100 and the reflective lens unit 221.

[0046] In the present application, when the material 100 passes through the reflective lens unit 221, the first camera 2111 of the first image acquisition device 211 simultaneously shoots the material 100 and the reflective lens unit 221, thus, the image acquired by the first image acquisition device 211 includes both image information obtained by directly shooting the material 100 and image information of the image in the reflective lens unit 221 acquired by shooting the reflective lens unit 221, thus, in the present application, the surface feature information of the material 100 reflected by the image acquired by the first image acquisition device 211 is more comprehensive and accurate, the specific reason being that the image formed by the reflective lens unit 221 includes the surface features of the back of the material 100 (the side of the material 100 facing away from the first camera 2111) that cannot be obtained by directly shooting the material 100 by the first camera 2111, thus, the image obtained by the first image acquisition device 211 also includes at least partial surface features of the back of the material 100, for example, the low-latitude region 101 of the material 100 reflected in the image formed by the reflective lens unit 221 is not excessively distorted, thus, the distortion degree of the image obtained by the first image acquisition device 211 in reflecting the surface features of the low-latitude region 101 of the material 100 is greatly improved, thus, the surface features of the material 100 reflected by the image are more accurate, as shown, if the material 100 has a pit 102 defect in the low-latitude region 101, it can be accurately identified from the image of the reflective lens unit 221. Figure 3 Based on the above, using the reflective lens unit 221 to image the material 100 and using a single set of image acquisition device to shoot the material 100 and the reflective lens unit 221 can increase the field of view and reduce the distortion of the low-latitude region 101 of the material 100 in the image.

[0047] In some preferred schemes, as shown in Figure 2 In some more preferred schemes, as shown in Figure 4As shown, multiple reflective mirror units 221 are arranged on each side of each column of material 100, and these units are arranged circumferentially. This allows for a more comprehensive and accurate reflection of the surface features of the material 100 in the acquired image. In some more preferred embodiments, the spatial orientation and position of each reflective mirror unit 221 on each side of each column of material 100 are adjustable, allowing the reflective mirror unit 221 to be adjusted to a more suitable position and spatial angle, and adapting to different types and sizes of material 100. Preferably, each reflective mirror unit 221 is mounted on a base plate (not shown) to facilitate the installation of the reflective mirror unit 221 and the interconnection between them. Preferably, the multiple reflective mirror units 221 on each side are sequentially hinged via ball joint assemblies (i.e., hinged by the engagement of a ball cup component and a ball head component) to make the spatial orientation and position of the reflective mirror unit 221 adjustable. Figure 2 As shown, the reflective lens unit 221 in the lens assembly 22 described above is mounted on a crossbeam located above the conveyor belt 11, with its position and height adjustable via a connecting component.

[0048] Furthermore, although exemplary embodiments have been described in this invention, its scope includes any and all embodiments based on this invention that have equivalent elements, modifications, omissions, combinations (e.g., schemes involving intersections of various embodiments), adaptations, or alterations. Elements in the claims will be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the implementation of this application, which will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered illustrative only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0049] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. Other embodiments can be used by those skilled in the art when reading the above description. Furthermore, in the above detailed description, various features may be grouped together to simplify the invention. This should not be construed as an intention that a disclosed feature not claimed is necessary for any claim. Rather, the subject matter of the invention may be less than all the features of a particular disclosed embodiment. Thus, the following claims are incorporated herein by reference as examples or embodiments, wherein each claim is an independent, separate embodiment, and these embodiments are contemplated to be combined with each other in various combinations or arrangements. The scope of the invention should be determined by reference to the appended claims and the full scope of their equivalents.

[0050] The above examples are only exemplary embodiments of the present application, and are not used to limit the present application, and the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and the modification or equivalent replacement is also regarded as falling within the protection scope of the present application.

Claims

1. A visual recognition system, characterized by, Comprising: an image acquisition device and a lens assembly; the lens assembly comprises at least one reflective lens unit, at least one of the reflective lens units is arranged adjacent to and spatially inclined upwardly to each column of material conveyed by the conveyor belt, so that when the material passes through the reflective lens unit, the material is imaged on the reflective lens unit; the image acquisition device comprises a first image acquisition device, the first image acquisition device simultaneously photographs the material and the reflective lens unit to directly acquire images reflecting the surface features of the material and indirectly acquire images reflecting the surface features of the material through the image in the reflective lens unit, thereby increasing the viewing angle of the first image acquisition device by the reflective lens unit to increase the range of surface features of the material that the first image acquisition device can acquire.

2. The visual recognition system of claim 1, wherein, The first image acquisition device is located above the conveyor belt.

3. The visual recognition system of claim 1, wherein, At least one of the reflective lens units is arranged on each side of each column of material.

4. The visual recognition system of claim 3, wherein, A plurality of the reflective lens units are arranged on each side of each column of material, and the plurality of reflective lens units on each side of each column of material are arranged in a circumferential direction.

5. The visual recognition system of claim 4, wherein, The spatial posture and position of each of the reflective lens units on each side of each column of material are adjustable.

6. The visual recognition system of claim 4, wherein, The plurality of reflective lens units on each side of each column of material are sequentially hinged by a spherical hinge assembly so that the spatial posture and position of the reflective lens units are adjustable.

7. The visual recognition system of claim 1, wherein, The mirror surface of the reflective lens unit is planar.

8. The visual recognition system of claim 1, wherein, The mirror surface of the reflective lens unit is convex.

9. The visual recognition system of claim 1, wherein, The image acquisition device further comprises a second image acquisition device, the second image acquisition device is located below the conveyor belt, and the conveyor belt is configured to be transparent; wherein: The second image acquisition device photographs the material from below through the conveyor belt to obtain images of the surface features of the material.

10. The visual recognition system of claim 1, wherein, The image acquisition device comprises a video camera or a still camera.

11. A multi-stage screening vision sorter comprising a conveying platform, a reject system, a collection mechanism, characterised in that, Also comprising the visual recognition system as claimed in any one of claims 1 to 10.

Images