Device for detecting stretching degree of tobacco leaves after loosening and moisture regaining processing

Abstract

The invention relates to the technical field of tobacco leaf loosening detection equipment, in particular to a device for detecting the stretching degree of tobacco leaves after loosening and moisture regaining processing. According to the technical scheme, the device comprises a detection device for detecting tobacco leaves, and further comprises a material taking conveying line, a material distributing vibration disc, a material conveying line, a square detection cover and a material returning conveying line which are arranged in the detection device in sequence. Through structural design of the material taking conveying line, the material distributing vibration disc, the material transporting conveying line, the detection square cover, the material returning conveying line, the industrial camera and the like, the light transmittance of the tobacco leaves is analyzed through the image recognition technology, and the stretching degree of the tobacco leaves is converted into a quantitative index of the area proportion of a gray value region; the problems of strong evaluation subjectivity and poor consistency caused by dependence on artificial sensory judgment in the prior art are solved. And meanwhile, automatic extraction, dispersion, image acquisition and material recovery of tobacco leaf samples are also realized. The whole detection process does not need manual intervention, and the detection efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco leaf looseness detection equipment, and in particular to a device for detecting the stretching degree of tobacco leaves after looseness and moisture regain processing. Background Art

[0002] Tobacco leaf loosening and rehumidification is a technology used in the tobacco leaf processing process. Its main purpose is to restore the proper humidity of the tobacco leaves to make them more suitable for subsequent processing, storage, rolling and other operations. In order to ensure the quality and processing performance of the tobacco leaves, it is usually necessary to test the degree of stretching of the tobacco leaves after the loosening and rehumidification process. In the traditional tobacco leaf silk making process, the degree of stretching of the tobacco leaves after processing is a key indicator in the processing quality evaluation characteristics of the loosening and rehumidification process. However, the current evaluation of the degree of stretching of tobacco leaves mainly relies on manual experience and sensory judgment, which lacks objectivity, standardization and efficiency, and easily leads to inconsistent evaluation results, low production efficiency, and difficulty in quantification. Summary of the invention

[0003] The purpose of the present invention is to propose a device for detecting the stretch degree of tobacco leaves after loosening and moisture regaining processing, in order to address the problem that the current evaluation of the stretch degree of tobacco leaves mainly relies on manual experience and sensory judgment, which lacks objectivity, standardization and efficiency, and easily leads to inconsistent evaluation results, low production efficiency and difficulty in quantification.

[0004] The technical solution of the present invention is as follows: a device for detecting the stretching degree of tobacco leaves after loosening and rehumidification processing, including a detection device for checking tobacco leaves, and also including: a material taking conveyor line, a material dividing vibration plate, a material conveyor line, a detection square cover and a material return conveyor line arranged in sequence in the detection device, wherein an industrial camera is arranged in the detection square cover; a detection mechanism installed on the material conveyor line to test the humidity of tobacco leaves; a U-shaped frame fixedly connected to the material conveyor line, wherein the U-shaped frame is provided with a cylinder for driving the detection mechanism to cover the tobacco leaves on the material conveyor line; The detection mechanism includes a lifting cover arranged on the material conveying line, a grid plate is fixedly connected to the interior of the lifting cover, a heating tube for heating tobacco leaves on the material conveying line is provided on the lower surface of the grid plate, a plurality of linearly arranged air holes are opened on the grid plate, and a dry-bulb thermometer aligned with the air holes is fixedly connected to the upper surface of the grid plate.

[0005] Optionally, the piston rod of the cylinder movably passes through the U-shaped frame and is fixedly connected to the upper surface of the lifting cover, and the upper surface of the lifting cover is fixedly connected to a pair of U-shaped limit frames that clamp the U-shaped frame.

[0006] Optionally, both ends of the top of the lifting cover are provided with material taking ports, the interiors of the material taking ports are covered with sealing plates, and the sealing plates are provided with a plurality of screws.

[0007] Optionally, a pair of fixing holes are provided at the end of the U-shaped frame close to the material conveying line.

[0008] Optionally, a support cylinder is provided at the bottom of the material taking conveyor line, a plurality of discharge ports are provided on the material dividing vibration plate, and a pair of baffles are provided on both sides of the material taking conveyor line and the material transport conveyor line.

[0009] Optionally, the return material conveying line includes a conveyor belt, and a plurality of partitions are provided on the conveyor belt.

[0010] Optionally, a bracket is provided on the end of the material conveyor line away from the material dividing vibration plate, and a plurality of support blocks for supporting detection square covers are fixedly connected to the top of the bracket. A support block for supporting an industrial camera is also fixedly connected to the middle of the bracket. A backlight area is provided on the material conveyor line directly below the industrial camera.

[0011] Optionally, a plurality of bolt holes are provided at one end of the bracket close to the outer walls on both sides of the material conveying line.

[0012] Optionally, the top of the detection device is rotatably connected to a rotating bracket, a controller is provided at the end of the rotating bracket away from the detection device, the detection device is also provided with multiple pairs of viewing windows, the bottom of the detection device is fixedly connected to multiple universal pulleys, and the detection device is also provided with installation grooves for the ends of the material supply and material return conveyor line to disengage.

[0013] In summary, the present application includes at least one of the following beneficial technical effects: The present invention analyzes the light transmittance of tobacco leaves through the design of material taking conveyor lines, material dividing vibration plates, material transport conveyor lines, detection square covers, return material conveyor lines, industrial cameras and other structures through image recognition technology, and converts the degree of stretching of tobacco leaves into a quantitative indicator of the area ratio of the gray value region, thereby solving the problem of strong subjectivity and poor consistency in evaluation caused by reliance on manual sensory judgment in the prior art. At the same time, it also realizes the automatic extraction, dispersion, image acquisition and material recovery of tobacco leaves. The entire detection process does not require manual intervention, which significantly improves the detection efficiency and can meet the batch detection needs of modern tobacco leaf processing and production; Furthermore, the present invention utilizes the cooperation of the detection mechanism, U-shaped frame, cylinder, heating tube and dry-bulb thermometer to conduct preliminary detection before using the industrial camera for detection, which is equivalent to setting a pre-quality control checkpoint in the entire detection process. Through this checkpoint, the overall quality and basic conditions of the looseness of the tobacco leaves can be controlled, and some factors that affect the reliability of the final detection results (such as severe moisture) can be discovered and handled in a timely manner, resulting in abnormal looseness and tobacco leaves that cannot be accurately judged through normal detection processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a device for detecting the degree of stretching of tobacco leaves after loosening and moisture regaining processing according to the present invention is provided; Figure 2 for Figure 1 Schematic diagram of some structures; Figure 3 for Figure 2 Schematic diagram of some structures; Figure 4 for Figure 3 Schematic diagram of some structures; Figure 5 for Figure 3 Schematic diagram of the connection structure between the middle U-shaped frame and the lifting cover; Figure 6 for Figure 5 Schematic diagram of the partial split structure.

[0015] Figure numerals: 1. Detection device; 11. Universal pulley; 12. Rotating bracket; 13. Controller; 14. Viewing window; 15. Mounting slot; 2. Material taking conveyor line; 21. Support cylinder; 3. Material dividing vibration plate; 31. Material discharge port; 4. Material transport conveyor line; 41. Baffle; 42. Backlight area; 5. Detection square cover; 51. Bracket; 52. Support block; 53. Bolt hole; 54. Support block; 55. Industrial camera; 6. Return material conveyor line; 61. Conveyor belt; 62. Partition; 7. U-shaped frame; 71. Fixing hole; 72. Cylinder; 8. Lifting cover; 81. Material taking port; 82. Sealing plate; 83. Screw; 84. Grid plate; 85. Air vent; 86. Dry-bulb and wet-bulb thermometer; 87. U-shaped limit frame; 88. Heating tube. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0018] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] It should be noted that the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Example

[0023] like Figures 1 to 6As shown, the present invention proposes a detection device for the stretching degree of tobacco leaves after loosening and rehydration processing, including a detection device 1 for checking tobacco leaves, and also including: a material taking conveyor line 2, a material dividing vibration plate 3, a material transport conveyor line 4, a detection square cover 5 and a material return conveyor line 6 arranged in sequence in the detection device 1, a support tube 21 is provided at the bottom of the material taking conveyor line 2, and one end of the bottom of the material taking conveyor line 2 is located directly above the material dividing vibration plate 3, and its function is to ensure that all tobacco materials on the material taking conveyor line 2 are transported to the material dividing vibration plate 3. The material transport conveyor line 4 is located at the bottom end of the material return conveyor line 6 away from the material dividing vibration plate 3, and its function is to ensure that the tobacco materials on the material transport conveyor line 4 are finally discharged to the material return conveyor line 6. A brush device is provided at one end of the material transport conveyor line 4 away from the material dividing vibration plate 3 to sweep away the residual debris adsorbed on the backlight area 42, to ensure the cleanliness of the backlight area 42 and avoid the interference of debris on subsequent image acquisition. The material distribution vibration plate 3 is provided with a plurality of discharge ports 31, which are all located at the top of one end of the material conveying line 4, and their function is to ensure that the tobacco material discharged from the discharge port 31 will fall onto the material conveying line 4. A pair of baffles 41 are provided on both sides of the material taking conveying line 2 and the material conveying line 4, and the baffles 41 are used to ensure that the materials of the material taking conveying line 2 and the material conveying line 4 will not fall into the two sides. The return material conveying line 6 includes a conveyor belt 61, and a plurality of partitions 62 are provided on the conveyor belt 61. The partitions 62 can guide the tobacco material to move along a specific direction and path on the conveyor belt to ensure that the material reaches the designated position accurately. An industrial camera 55 is provided in the detection square cover 5. Through the backlight design and the high-resolution imaging of the industrial camera 55, the difference in light transmittance of the tobacco leaves can be clearly captured, and the gray value area ratio can be accurately calculated by combining the image recognition algorithm. For example, the area with a lower gray value corresponds to the part with more folded layers, while the area with a higher gray value corresponds to the part with better stretching. Based on this, the present invention can accurately calculate the degree of stretch of tobacco leaves, provide an objective evaluation basis for the quality of tobacco leaf processing, and thus accurately evaluate the degree of stretch of tobacco leaves. Compared with traditional manual detection, the present invention has higher detection accuracy and consistency; the U-shaped frame 7 is fixedly connected to the material conveying line 4, and a pair of fixing holes 71 are opened at the end of the U-shaped frame 7 close to the material conveying line 4. The U-shaped frame 7 is provided with a cylinder 72 that drives the detection mechanism to cover the tobacco leaves on the material conveying line 4. The piston rod of the cylinder 72 is movably passed through the U-shaped frame 7 and is fixedly connected to the upper surface of the lifting cover 8. The upper surface of the lifting cover 8 is fixedly connected with a pair of U-shaped limit frames 87 that clamp the U-shaped frame 7. The U-shaped limit frame 87 ensures that the lifting cover 8 can move up and down more stably after clamping the U-shaped frame 7 through a pair of U-shaped limit frames 87.

[0024] Further, if Figures 5 and 6As shown, a detection mechanism installed on the material conveying line 4 to test the humidity of tobacco leaves; the detection mechanism includes a lifting cover 8 arranged on the material conveying line 4, and an inclined port is opened at the bottom end of the lifting cover 8, which is used to ensure that the inclined port is closely connected to the baffle 41. Both ends of the top of the lifting cover 8 are provided with a material taking port 81, and the inside of the material taking port 81 is covered with a sealing plate 82, and a plurality of screws 83 are provided on the sealing plate 82. The inside of the lifting cover 8 is fixedly connected with a grid plate 84, and the lower surface of the grid plate 84 is provided with a heating tube 88 for heating the tobacco leaves on the material conveying line 4. The heating tube 88 works on the principle of generating heat by passing current through a resistance wire. When current passes through the resistance wire, the resistance wire will heat up, converting electrical energy into thermal energy, and then heating the surrounding tobacco leaves. Thereby, different degrees of looseness of tobacco leaves evaporate different moisture. A plurality of linearly arranged air holes 85 are opened on the grid plate 84, and the air holes 85 are used to ensure that the evaporated water vapor will pass through the air holes 85 and be detected by the dry-bulb thermometer 86. The upper surface of the grid plate 84 is fixedly connected with a dry-bulb thermometer 86 aligned with the air vent 85. The dry-bulb thermometer 86 is an instrument for measuring air humidity. It consists of two thermometers, one is a dry-bulb thermometer and the other is a wet-bulb thermometer. The two thermometers are usually installed on the same bracket and suspended by the same support rod. The main function of the dry-bulb thermometer 86 is to calculate the humidity of the air by measuring the temperature difference between the dry-bulb and wet-bulb.

[0025] Among them, Figure 3 to Figure 4 As shown, a bracket 51 is provided on one end of the material conveying line 4 away from the material distribution vibration plate 3, and a plurality of bracket blocks 52 supporting the detection square cover 5 are fixedly connected to the top of the bracket 51, and the top of the bracket block 52 is fixedly connected to the inner wall of the detection square cover 5. A support block 54 supporting the industrial camera 55 is also fixedly connected to the middle of the bracket 51. A backlight area 42 located directly below the industrial camera 55 is provided on the material conveying line 4. The backlight area 42 is used in conjunction with the industrial camera 55 to provide an area for additional lighting behind the camera object. The main function is to highlight the outline or details of the object by providing sufficient lighting, ensuring that the camera can capture the object more clearly and avoid blurry or unclear images due to insufficient lighting. A plurality of bolt holes 53 are provided on one end of the bracket 51 close to the outer wall on both sides of the material conveying line 4. The detection square cover 5 is to protect the camera and improve its working efficiency and image quality.

[0026] Going further, Figure 1As shown, the top of the detection device 1 is rotatably connected to a rotating bracket 12, and a controller 13 is provided at one end of the rotating bracket 12 away from the detection device 1. The controller 13 is the core part of the device, responsible for processing the data of the loose detection of tobacco leaves, controlling the working process of the device, and providing an operation interface. Usually, these controllers receive the state information of tobacco leaves through sensors, analyze whether the tobacco leaves are loose, and thus decide whether to perform corresponding processing or feedback. The detection device 1 is also provided with multiple pairs of viewing windows 14, and the bottom of the detection device 1 is fixedly connected with a number of universal pulleys 11. The universal pulley 11 is a special pulley, which is designed to allow the pulley to rotate freely in multiple directions, and is usually used to change the direction of the rope or cable, thereby providing more efficient mechanical transmission and control. The main difference between it and an ordinary pulley is that the universal pulley can rotate freely within a wide range of angles, so it can flexibly adapt to different installation and use environments. The detection device 1 is also provided with a mounting groove 15 for the ends of the material conveying line 2 and the return material conveying line 6 to be detached, and the mounting groove 15 is to ensure that the device can be extended from the detection device 1 for use.

[0027] In this embodiment, when it is necessary to use a device for detecting the stretching degree of tobacco leaves after loosening and rehydration processing, such as Figure 1As shown, the sample tobacco leaves are first placed on the material taking conveyor line 2. After the material taking conveyor line 2 is running, the tobacco leaves on it can be transported to one end of the material dividing vibration plate 3, and the tobacco leaves fall into the material dividing vibration plate 3 by gravity. After that, the material dividing vibration plate 3 is running, the tobacco leaf samples are shaken apart by vibration to ensure that the tobacco leaves are continuously output to the material conveyor line 4 in a single piece. This step effectively avoids the accumulation or adhesion of tobacco leaves, and provides a uniform sample distribution for the subsequent image acquisition of the industrial camera 55. Then, the tobacco leaves in the material dividing vibration plate 3 fall evenly onto the material conveyor line 4 through multiple discharge ports 31. At this time, the tobacco leaves are first transported to the bottom of the lifting cover 8 to stop the operation of all equipment. It is only necessary to start the cylinder 72 on the U-shaped frame 7, and the piston rod of the cylinder 72 pushes the lifting cover 8 to move downward until the bottom end of the lifting cover 8 completely blocks the baffle 41 on the material conveyor line 4, so that the bottom end of the lifting cover 8 can cover the tobacco leaves on the material conveyor line 4 directly below. Then, the heating tube 88 is turned on for a period of time, and the heating tube 88 can heat the tobacco leaves covered by the lifting cover 8. The heated tobacco leaves will discharge the moisture inside, and the moisture will float upward and be detected by the dry-bulb thermometer 86. The dry-bulb thermometer 86 can know whether the tobacco leaves are loose through the moisture evaporated from the tobacco leaves, because loose tobacco leaves will cause faster moisture evaporation, which in turn affects the change of wet bulb temperature, while the moisture of compact tobacco leaves evaporates slowly and the temperature difference is small. Therefore, it can be known whether the tobacco leaves are loose or compact. At this time, the material taking conveyor line 2, the material dividing vibration plate 3, the material transport conveyor line 4 and the return material conveyor line 6 can be started. Finally, the tobacco leaves that come off the material transport conveyor line 4 will fall onto the return material conveyor line 6, and the tobacco leaves that fall onto the conveyor belt 61 will be sent back to the production area through the partition 62, thereby realizing the recycling of materials and avoiding waste. When the looseness of the tobacco leaves is not known by the detection mechanism on the conveyor line 4, the tobacco leaves on the conveyor line 4 will be transported to the detection square cover 5 and located on the backlight area 42. At this time, the industrial camera 55 after being turned on cooperates with the backlight light source covered in the detection square cover 5 to shoot the image of the tobacco leaves in the light-transmitting state. The folded part and the stretched part of the tobacco leaves form an obvious color depth contrast in the image, and then after subsequent image analysis, the looseness of the tobacco leaves is finally known, which is quick and easy to operate. Finally, the tobacco leaves that have escaped from the conveyor line 4 will be sent back to the production area.

[0028] The preferred embodiments of the present invention described above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for detecting the stretching degree of tobacco leaves after loosening and rehydration processing, comprising a detection device 1 for inspecting tobacco leaves, characterized in that: Also includes: The detection device 1 is provided with a material taking conveyor line 2, a material dividing vibration plate 3, a material transport conveyor line 4, a detection square cover 5 and a material return conveyor line 6 in order, and the detection square cover 5 is provided with an industrial camera 55; A detection mechanism is installed on the material conveying line 4 to test the humidity of tobacco leaves. The detection mechanism includes a lifting cover 8 arranged on the material conveying line 4. A grid plate 84 is fixedly connected to the inside of the lifting cover 8. A heating pipe 88 for heating tobacco leaves on the material conveying line 4 is provided on the lower surface of the grid plate 84. A plurality of linearly arranged air holes 85 are opened on the grid plate 84. A dry-bulb and wet-bulb thermometer 86 aligned with the air holes 85 is fixedly connected to the upper surface of the grid plate 84. A U-shaped frame 7 is fixedly connected to the material conveying line 4 , and a cylinder 72 is provided on the U-shaped frame 7 for driving a detection mechanism to cover the tobacco leaves on the material conveying line 4 .

2. The device for detecting the stretching degree of tobacco leaves after loosening and moisture regaining processing according to claim 1 is characterized in that: The piston rod of the cylinder 72 movably passes through the U-shaped frame 7 and is fixedly connected to the upper surface of the lifting cover 8. A pair of U-shaped limiting frames 87 that clamp the U-shaped frame 7 are fixedly connected to the upper surface of the lifting cover 8.

3. The device for detecting the stretching degree of tobacco leaves after loosening and moisture regaining processing according to claim 1 is characterized in that: Both ends of the top of the lifting cover 8 are provided with material taking openings 81 , and the interiors of the material taking openings 81 are covered with sealing plates 82 , and the sealing plates 82 are provided with a plurality of screws 83 .

4. The device for detecting the stretching degree of tobacco leaves after loosening and moisture regaining processing according to claim 1 is characterized in that: The ends of the U-shaped frame 7 close to the material conveying line 4 are each provided with a pair of fixing holes 71 .

5. The device for detecting the stretching degree of tobacco leaves after loosening and moisture regaining processing according to claim 1 is characterized in that: A support tube 21 is provided at the bottom of the material taking conveyor line 2 , a plurality of discharge ports 31 are provided on the material dividing vibration plate 3 , and a pair of baffles 41 are provided on both sides of the material taking conveyor line 2 and the material transport conveyor line 4 .

6. The device for detecting the stretching degree of tobacco leaves after loosening and moisture regaining processing according to claim 1 is characterized in that: The return material conveying line 6 comprises a conveying belt 61 , on which a plurality of partitions 62 are arranged.

7. The device for detecting the stretching degree of tobacco leaves after loosening and moisture regaining processing according to claim 1 is characterized in that: A bracket 51 is provided on the end of the material conveying line 4 away from the material dividing vibration plate 3, and a plurality of bracket blocks 52 for supporting the detection square cover 5 are fixedly connected to the top of the bracket 51. A support block 54 for supporting the industrial camera 55 is also fixedly connected to the middle of the bracket 51. A backlight area 42 is provided on the material conveying line 4 and is located directly below the industrial camera 55.

8. A device for detecting the stretching degree of tobacco leaves after loosening and moisture regaining processing according to claim 7, characterized in that: A plurality of bolt holes 53 are formed at one end of the bracket 51 close to the outer walls of both sides of the material conveying line 4 .

9. The device for detecting the stretching degree of tobacco leaves after loosening and moisture regaining processing according to claim 1, characterized in that: The top of the detection device 1 is rotatably connected to a rotating bracket 12, and a controller 13 is provided at the end of the rotating bracket 12 away from the detection device 1. The detection device 1 is also provided with a plurality of pairs of viewing windows 14, and the bottom of the detection device 1 is fixedly connected to a plurality of universal pulleys 11. The detection device 1 is also provided with a mounting groove 15 for the ends of the material supply and removal conveyor line 2 and the return material conveyor line 6 to escape.

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