Screen mesh detection device for tobacco material vibration screening equipment
Through the cooperation of the CIS scanning component and the parallel light source component, the optical signal is converted by using the photosensitive sensor to achieve efficient and accurate detection of the screen mesh, solving the separation accuracy problem caused by the screen mesh deformation, and ensuring the quality of tobacco materials.
Patent Information
- Application Number
- CN202422636017.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In the prior art, the deformation of the screen in the vibration sorting machine causes the change of the mesh, affecting the accuracy of the tobacco or tobacco leaf sorting, and the traditional detection methods are inefficient or insufficient in accuracy.
The CIS scanning component and the parallel light source component are used to capture the detailed characteristics of the screen mesh through the CIS scanning head, and the optical signal is converted using a photosensitive sensor to achieve high-precision detection.
It realizes efficient and accurate detection of screen mesh holes, ensures that screen mesh meets quality standards, and improves the uniformity and consistency of tobacco material sorting.
Smart Images
Figure CN223283588U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cigarette machinery and equipment, in particular to a screen mesh detection device used in tobacco material vibration screening equipment. Background Art
[0002] Tobacco structure testing is a crucial aspect of the tobacco-making process, involving the precise inspection and analysis of the structure of cut tobacco or tobacco leaves. Currently, most tobacco structure testing equipment utilizes vibrating separator technology. This equipment, by setting specific quality standards, sieves cut tobacco or tobacco leaves according to the size of the screen, separating samples of varying sizes. These samples are then weighed and their percentage of the total mass is calculated to assess the uniformity and consistency of the tobacco structure.
[0003] The quality of the screen is crucial to ensuring sorting quality. However, due to the continuous vibration of the vibrating sorter, the screen may deform, which may cause subtle changes in the screen mesh. These changes can significantly affect the sorting accuracy of the tobacco or tobacco leaves, and thus affect the quality of the final product.
[0004] After novelty search, traditional solutions, such as CN202310268881.4_A steel mesh mesh detection device and CN202321478581.0_A mesh detection equipment, provide a solution for detecting mesh holes using camera image recognition technology. However, this technology based on visual recognition is less effective for high-precision detection such as mesh deformation, and is usually used in relatively low-requirement detection work such as finished product qualification inspection. In the field of tobacco structure detection, detection accuracy has a greater impact on the detection results, so the requirements for recognition accuracy are also increased accordingly.
[0005] There are also technical solutions that use traditional vernier calipers to sample and test the mesh, but these solutions require the installed screen to be removed from the equipment for testing, and the entire process is time-consuming and labor-intensive.
[0006] Therefore, how to efficiently detect the mesh size of the screen is a technical problem that needs to be solved urgently.
[0007] In order to solve the above problems, people have been seeking an ideal technical solution. Utility Model Content
[0008] The purpose of the utility model is to address the deficiencies of the prior art and thus provide a screen mesh detection device for tobacco material vibration screening equipment with high detection accuracy and high detection efficiency.
[0009] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a screen mesh detection device for tobacco material vibration screening equipment, comprising a CIS scanning component, a parallel light source component and a screen support structure;
[0010] The CIS scanning component is arranged above or below the screen support structure and is used to scan the mesh of the screen supported on the screen support structure;
[0011] The parallel light source assembly is arranged below or above the screen support structure relative to the CIS scanning assembly, and is used to provide light source for the CIS scanning assembly.
[0012] Based on the above, the effective scanning area of the CIS scanning component is smaller than the effective support area of the screen support structure, and the CIS scanning component as a whole moves horizontally along the span direction of the screen support structure; the effective light-emitting area of the parallel light source component is adapted to the effective scanning area of the CIS scanning component, and moves horizontally along the span direction of the screen support structure synchronously with the CIS scanning component.
[0013] Based on the above, the effective scanning area of the CIS scanning assembly is smaller than the effective support area of the screen support structure, and the CIS scanning assembly as a whole moves horizontally along the span direction of the screen support structure; the effective light-emitting area of the parallel light source assembly is fixed to the effective support area of the covering screen support structure.
[0014] Based on the above, the effective scanning area of the CIS scanning assembly covers the effective support area of the screen support structure and is fixed; the effective light-emitting area of the parallel light source assembly is smaller than the effective scanning area of the CIS scanning assembly, and the parallel light source assembly as a whole moves horizontally along the span direction of the screen support structure.
[0015] Based on the above, the CIS scanning assembly and the parallel light source assembly are driven to move by the same translation mechanism, and the translation mechanism includes at least two transverse guide rails, a moving unit and at least two limit members. The transverse guide rails are laid parallel to the span direction of the screen support structure, and the moving unit includes a vertical guide rod and a moving seat. The vertical guide rod is slidably set on the transverse guide rails through each moving seat, and the limit members are set at both ends of the transverse guide rails to limit the moving stroke of the moving unit.
[0016] Based on the above, the CIS scanning assembly includes a frame-shaped housing, an electric screw module, a glass cover and a CIS scanning head. The electric screw module is installed in the frame-shaped housing and the driving direction is perpendicular to the overall movement direction of the CIS scanning assembly. The CIS scanning head is installed at the driving end of the electric screw module to perform reciprocating linear motion inside the frame-shaped housing to perform scanning action; the glass cover is sealed on the outside of the frame-shaped housing and serves as a scanning window of the CIS scanning head.
[0017] Based on the above, the parallel light source assembly includes a parallel light source housing that is compatible with the size of the CIS scanning assembly, an LED light board, an array of LED point light sources, an array of plano-convex lenses, and a light isolation plate group;
[0018] The LED light board is installed at the bottom of the parallel light source housing, the array LED point light source is installed based on the LED light board, the light isolation plate group is used to isolate the array LED point light sources one by one, the array plano-convex lens covers the array LED point light sources as a window, each convex lens in the array plano-convex lens corresponds one by one to each LED point light source and each LED point light source is located at the focus of the corresponding plano-convex lens, which is used to convert divergent light into parallel light.
[0019] Based on the above, the CIS scanning assembly and the parallel light source assembly are respectively mounted on the vertical guide rod through a first connecting member and a second connecting member;
[0020] The CIS scanning assembly and the first connecting member can rotate vertically, and the first connecting member and the vertical guide rod can rotate horizontally and slide vertically, and a corresponding locking mechanism is provided;
[0021] The parallel light source assembly and the second connecting member can rotate vertically, and the second connecting member and the vertical guide rod can rotate horizontally and slide vertically, and corresponding locking mechanisms are provided.
[0022] Based on the above, it also includes a three-dimensional frame, and the CIS scanning component, parallel light source component and screen support structure are all installed based on the three-dimensional frame. A placement table is set on the three-dimensional frame at one end of the translation mechanism, which is used as a temporary support for the CIS scanning component and the parallel light source component.
[0023] Based on the above, the vertical rotation angle of the CIS scanning assembly and the parallel light source assembly is 90°. The present invention has substantial features and progress compared to the prior art. Specifically, the present invention utilizes CIS scanning technology and a parallel light source. When the parallel light emitted by the parallel light source passes through the screen, the parallel light that hits the metal wire of the screen will be blocked and will not be received by the photosensor in the CIS scanning head. The parallel light that does not hit the metal wire will pass through the mesh of the screen and be received by the photosensor in the CIS scanning head. The photosensor can convert the received light signal into an electrical signal. Therefore, the image captured by the CIS scanning head can accurately map the detailed features of the mesh of the screen. Using this image, we can evaluate and detect the size, shape and distribution of the mesh of the screen to ensure that it meets the required specifications and quality standards.
[0024] Furthermore, other auxiliary supporting structures such as translation scanning and movable adjustment are added to increase the automation and electronic control capabilities of the device and improve the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of a screen mesh detection device for tobacco detection equipment of the present invention;
[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the translation mechanism in Example 2 of the present utility model.
[0027] Figure 3 This is a structural diagram of the CIS scanning component in Example 2 of the present utility model.
[0028] Figure 4 This is a cross-sectional view of the CIS scanning assembly in Example 2 of the present utility model.
[0029] Figure 5 This is a structural diagram of the parallel light source assembly in Example 2 of the present utility model.
[0030] Figure 6 This is a cross-sectional view of the parallel light source assembly in Example 2 of the present utility model.
[0031] Figure 7 This is a schematic diagram of the working status of the device in Example 2 of the present utility model.
[0032] Figure 8 This is a schematic diagram of Example 1 of the present utility model.
[0033] Description of the marks in the figure:
[0034] 1. CIS scanning assembly; 2. Parallel light source assembly; 3. Placement table; 4. Translation mechanism; 5. Horizontal guide rail; 6. Limiting piece; 7. Screen;
[0035] 101. Frame-shaped housing; 102. Glass cover; 103. Electric lead screw module; 104. CIS scanner head; 1011. First groove; 1031. Stepper motor; 1032. Lead screw; 1033. Mounting seat; 1034. Lead screw bearing; 1035. Bushing; 1036. Guide rail; 1037. Coupling; 1041. Lead screw nut; 1042. Guide rail sleeve.
[0036] 21. Parallel light source housing; 22. LED light board; 23. Array LED point light source; 24. Array plano-convex lens; 25. Light isolation plate assembly; 211. Second groove 2;
[0037] 41. Vertical guide rod; 42. Moving seat; 43. Vertical adjustment member; 44. Rotational adjustment member; 45. First connecting member; 46. Rotational limit locking screw; 47. Rotational locking screw; 48. Vertical locking screw; 49. Second connecting member; 421. Roller; 51. Guide groove. DETAILED DESCRIPTION
[0038] The technical solution of the present utility model is further described in detail below through specific implementation methods.
[0039] Example 1
[0040] like Figure 8 As shown, a screen mesh detection device for tobacco material vibration screening equipment includes a CIS scanning component 1, a parallel light source component 2 and a screen support structure.
[0041] The CIS scanning assembly 1 is arranged above or below the screen support structure and is used to scan the mesh of the screen 7 supported on the screen support structure;
[0042] The parallel light source assembly 2 is arranged below or above the screen support structure relative to the CIS scanning assembly, and is used to provide light source for the CIS scanning assembly 1.
[0043] In this solution, the CIS scanning technology is used with the currently popular technology of using cameras to collect images for recognition, and a parallel light source component 2 is set on the opposite side of the CIS scanning component 1 to provide sufficient parallel light. The parallel light emitted by the parallel light source will be blocked when it passes through the screen. The parallel light that hits the metal wire of the screen will be blocked and will not be received by the photosensor in the CIS scanning head. The parallel light that does not hit the metal wire will pass through the mesh of the screen and be received by the photosensor in the CIS scanning head. The photosensor can convert the received light signal into an electrical signal. Therefore, the image captured by the CIS scanning head can accurately map the detailed features of the mesh of the screen. Using this image, we can evaluate and detect the size, shape and distribution of the mesh of the screen to ensure that it meets the required specifications and quality standards.
[0044] The CIS scanning component 1 and the parallel light source component 2 are arranged above and below the screen 7, and their upper and lower positions are interchangeable without affecting the accuracy of detection.
[0045] Example 2
[0046] like Figure 1-Figure 7 As shown, in the preferred solution, taking into account the cost constraints and the screen size factors, different distribution forms can be used in different situations.
[0047] When the screen size is larger than the CIS scanning component, the effective scanning area of the CIS scanning component 1 is smaller than the effective support area of the screen support structure, that is, the area of the mesh distribution in the screen, which is called the effective support area. The CIS scanning component as a whole moves horizontally along the span direction of the screen support structure; the effective light-emitting area of the parallel light source component is adapted to the effective scanning area of the CIS scanning component, and moves horizontally along the span direction of the screen support structure synchronously with the CIS scanning component.
[0048] The above solution is relatively the most complex and is used as the basic structural form for describing this embodiment to fully illustrate the details of each structural improvement.
[0049] Specifically, to facilitate installation, a three-dimensional frame is also included. The CIS scanning component 1, parallel light source component 2 and screen support structure are all installed based on the three-dimensional frame. A placement table 3 is set on the three-dimensional frame at one end of the translation mechanism, which is used as a temporary support for the CIS scanning component 1 and the parallel light source component 2.
[0050] The CIS scanning assembly 1 and the parallel light source assembly 2 are driven to move by the same translation mechanism 4, which includes at least two transverse guide rails 5, a moving unit and at least two limit members 6. In this embodiment, there are two transverse guide rails 5, which are distributed up and down, and there are two limit members 6, which are arranged at both ends of one of the transverse guide rails 5. The translation mechanism 4 can be driven electrically or manually.
[0051] The transverse guide rail 4 is laid parallel to the span direction of the screen support structure. The movable unit includes a vertical guide rod 41 and a movable seat 42. The vertical guide rod 41 is slidably set on the transverse guide rail 5 through each movable seat 42. The limit member 6 is set at both ends of the transverse guide rail 4 to limit the moving stroke of the movable unit.
[0052] The CIS scanning assembly 1 includes a frame-shaped housing 101, an electric lead screw module 103, a glass cover 102, and a CIS scanning head 104. The electric lead screw module 103 is installed in the frame-shaped housing 101 and is driven in a direction perpendicular to the overall movement direction of the CIS scanning assembly 1. In this embodiment, the frame-shaped housing 101 is a rectangular frame, the overall movement direction of the CIS scanning assembly 1 is horizontal, and the movement direction of the CIS scanning head 104 is horizontal and vertical. The CIS scanning head 104 is installed at the driving end of the electric lead screw module 103 to perform reciprocating linear motion inside the frame-shaped housing for performing a scanning action;
[0053] Specifically, the electric screw module 103 includes a stepper motor 1031, a screw 1032, a mounting seat 1033, a screw bearing 1034, a sleeve 1035, a guide rail 1036, and a coupling 1037. A screw nut 1041 and two guide rail sleeves 1042 are set at the bottom of the CIS scanning head. The screw nut 1041 is installed on the screw 1032, the sleeve 1035 is installed on the guide rail 1036, and the guide rail sleeve 1042 is installed on the sleeve 1035.
[0054] The glass cover 102 is sealed on the outside of the frame-shaped housing 101 and is embedded in a first groove 1011 provided on the frame-shaped housing 101 , serving as a scanning window for the CIS scanning head 104 .
[0055] The parallel light source assembly 2 includes a parallel light source housing 21 that is adapted to the size of the CIS scanning assembly and is in the shape of a rectangular frame. It also includes an LED light board 22, an array of LED point light sources 23, an array of plano-convex lenses 24 and a light isolation plate group 25.
[0056] The LED light board 22 is installed at the bottom of the parallel light source housing 21, and the array LED point light source 23 is installed based on the LED light board 22. The light isolation plate group 25 is used to isolate the array LED point light source 23 one by one. The array plano-convex lens 24 covers the array LED point light source 23 as a window and is embedded based on the second groove 211 set on the parallel light source housing 21. Each convex lens in the array plano-convex lens 24 corresponds to each LED point light source 23 one by one, and each LED point light source 23 is located at the focus of the corresponding plano-convex lens 24, which is used to convert divergent light into parallel light. At this time, the plano-convex lens converts the scattered light emitted by the corresponding LED point light source into parallel light. There is a gap between the upper surface of the light isolation plate group and the lower surface of the array plano-convex lens. The light isolation plate group isolates the light emitted by each LED point light source, preventing the light emitted by each LED point light source from irradiating the plano-convex lens that does not correspond to it, affecting the parallel effect of the light emitted by the parallel light source as a whole.
[0057] To facilitate adjustment, the CIS scanning assembly 1 and the parallel light source assembly 2 are mounted on the vertical guide rod 41 via a first connecting member 45 and a second connecting member 49 , respectively.
[0058] The CIS scanning assembly 1 and the first connecting member 45 are vertically rotatable and connected by a rotational limit locking screw 46. The parallel light source assembly 2 and the second connecting member 49 are vertically rotatable and also connected by a rotational limit locking screw 46. Specifically, the first and second mounting members 45 and 49 are provided with a 90-degree annular groove (the grooves are positioned differently). The groove width matches the major diameter of the threaded end of the rotational limit locking screw 46. The first and second mounting members 45 and 49 are fixed in place by the rotational limit locking screw 46. When the rotational limit locking screw 46 is loosened, the first and second mounting members 45 and 49 can rotate within a range of 90 degrees.
[0059] The first connecting member 45 and the vertical guide rod 41 can rotate horizontally and slide vertically, and a corresponding locking mechanism is provided. Specifically, in this embodiment, rotation adjustment is achieved by rotating the adjusting member 44 and the vertical guide rod 41, and a rotation locking screw 47 is provided thereon to lock the rotating adjusting member 44 by pressing. The height adjustment of vertical sliding is achieved by the vertical adjusting member 43 and the vertical guide rod 41, and a vertical locking screw 48 is provided thereon to lock the vertical adjusting member 43 by pressing.
[0060] The second connecting member 49 and the vertical guide rod 41 can rotate horizontally and slide vertically, and a corresponding locking mechanism is provided, which is consistent with the structure of the first connecting member 45 and will not be described in detail.
[0061] Working process description:
[0062] Before performing the screen detection, the CIS scanning component 1 and the parallel light source component 2 are respectively moved to the top and bottom of the screen 7 through the translation mechanism 4. The glass cover of the CIS scanning component 1 is attached to the bottom of the screen 7, and the parallel light emitted by the parallel light source component 2 can cover the glass cover of the CIS scanning component.
[0063] When performing screen inspection, the lead screw moving module of the CIS scanning unit drives the CIS scanning head to scan the screen at a constant speed. When the parallel light emitted by the parallel light source passes through the screen, the parallel light hitting the metal wire of the screen will be blocked and will not be received by the photosensor in the CIS scanning head. The parallel light that does not hit the metal wire will pass through the mesh of the screen and be received by the photosensor in the CIS scanning head. The photosensor can convert the received light signal into an electrical signal. Therefore, the image captured by the CIS scanning head can accurately map the detailed features of the mesh of the screen. Using this image, we can evaluate and inspect the size, shape, and distribution of the mesh of the screen to ensure that it meets the required specifications and quality standards.
[0064] The upper and lower surfaces of the transverse guide rod 5 have guide grooves 51 , and the rollers 421 of the movable seat 42 slide in the guide grooves 51 . The movable seat 42 can drive the movable assembly to move along the transverse guide rod through the transverse guide rod, thereby achieving full-range detection of the screen.
[0065] The limiting parts are installed at both ends of the transverse guide rod, and the placement rack is installed on the side of the tobacco detection equipment. When the screen mesh detection is not performed, the placement rack is used to place the CIS scanning unit and the parallel light source unit.
[0066] In other embodiments, when the size of the screen is larger than the CIS scanning assembly, but the parallel light source is low in cost and can be flatly spread to cover the entire screen area, that is, the effective scanning area of the CIS scanning assembly is smaller than the effective support area of the screen support structure (that is, the area of the distribution of the mesh holes in the screen, referred to as the effective support area), the CIS scanning assembly as a whole moves horizontally along the span direction of the screen support structure; the effective light-emitting area of the parallel light source assembly is fixed to the effective support area of the covering screen support structure.
[0067] Correspondingly, when the CIS scanning component is cheaper, the effective scanning area of the CIS scanning component covers the effective support area of the screen support structure and is fixed; the effective light-emitting area of the parallel light source component is smaller than the effective scanning area of the CIS scanning component, and the parallel light source component as a whole moves horizontally along the span direction of the screen support structure.
[0068] Each of the above scenarios can be adjusted to varying degrees based on the needs of different markets and scenarios.
[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.
Claims
1. A screen mesh detection device for tobacco material vibrating screening equipment, characterized by: Including CIS scanning component, parallel light source component and screen support structure; The CIS scanning component is arranged above or below the screen support structure and is used to scan the mesh of the screen supported on the screen support structure; The parallel light source assembly is arranged below or above the screen support structure relative to the CIS scanning assembly, and is used to provide light source for the CIS scanning assembly.
2. The screen mesh detection device for tobacco material vibrating screening equipment according to claim 1, characterized in that: The effective scanning area of the CIS scanning component is smaller than the effective support area of the screen support structure, and the CIS scanning component as a whole moves horizontally along the span direction of the screen support structure; the effective light-emitting area of the parallel light source component is adapted to the effective scanning area of the CIS scanning component, and moves horizontally along the span direction of the screen support structure synchronously with the CIS scanning component.
3. The screen mesh detection device for tobacco material vibrating screening equipment according to claim 1, characterized in that: The effective scanning area of the CIS scanning component is smaller than the effective support area of the screen support structure, and the CIS scanning component as a whole moves horizontally along the span direction of the screen support structure; the effective light-emitting area of the parallel light source component is fixed to the effective support area of the covering screen support structure.
4. The screen mesh detection device for tobacco material vibrating screening equipment according to claim 2, characterized in that: The effective scanning area of the CIS scanning assembly covers the effective support area of the screen support structure and is fixed; the effective light-emitting area of the parallel light source assembly is smaller than the effective scanning area of the CIS scanning assembly, and the parallel light source assembly as a whole moves horizontally along the span direction of the screen support structure.
5. The screen mesh detection device for tobacco material vibrating screening equipment according to claim 2, characterized in that: The CIS scanning assembly and the parallel light source assembly are driven to move by the same translation mechanism, and the translation mechanism includes at least two transverse guide rails, a moving unit and at least two limit members. The transverse guide rails are laid parallel to the span direction of the screen support structure, and the moving unit includes a vertical guide rod and a moving seat. The vertical guide rod is slidably set on the transverse guide rails through each moving seat, and the limit members are set at both ends of the transverse guide rails to limit the moving stroke of the moving unit.
6. The screen mesh detection device for tobacco material vibrating screening equipment according to claim 5, characterized in that: The CIS scanning assembly includes a frame-shaped housing, an electric screw module, a glass cover and a CIS scanning head. The electric screw module is installed in the frame-shaped housing and the driving direction is perpendicular to the overall movement direction of the CIS scanning assembly. The CIS scanning head is installed at the driving end of the electric screw module to perform reciprocating linear motion inside the frame-shaped housing to perform scanning action; the glass cover is sealed on the outside of the frame-shaped housing and serves as a scanning window for the CIS scanning head.
7. The screen mesh detection device for tobacco material vibrating screening equipment according to claim 6, characterized in that: The parallel light source assembly includes a parallel light source housing adapted to the size of the CIS scanning assembly, an LED light board, an array of LED point light sources, an array of plano-convex lenses, and a light isolation plate group; The LED light board is installed at the bottom of the parallel light source housing, the array LED point light source is installed based on the LED light board, the light isolation plate group is used to isolate the array LED point light sources one by one, the array plano-convex lens covers the array LED point light sources as a window, each convex lens in the array plano-convex lens corresponds one by one to each LED point light source and each LED point light source is located at the focus of the corresponding plano-convex lens, which is used to convert divergent light into parallel light.
8. The screen mesh detection device for tobacco material vibrating screening equipment according to claim 5, characterized in that: The CIS scanning assembly and the parallel light source assembly are respectively mounted on the vertical guide rod via a first connecting member and a second connecting member; The CIS scanning assembly and the first connecting member can rotate vertically, and the first connecting member and the vertical guide rod can rotate horizontally and slide vertically, and a corresponding locking mechanism is provided; The parallel light source assembly and the second connecting member can rotate vertically, and the second connecting member and the vertical guide rod can rotate horizontally and slide vertically, and corresponding locking mechanisms are provided.
9. The screen mesh detection device for tobacco material vibrating screening equipment according to any one of claims 5 to 8, characterized in that: It also includes a three-dimensional frame, and the CIS scanning component, parallel light source component and screen support structure are all installed based on the three-dimensional frame. A placement table is set on the three-dimensional frame at one end of the translation mechanism to serve as a temporary support for the CIS scanning component and the parallel light source component.
10. The screen mesh detection device for tobacco material vibration screening equipment according to claim 8, characterized in that: The vertical rotation angle of the CIS scanning component and the parallel light source component is 90°.
Citation Information
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