Modular laser cigarette rod diameter detection structure

Abstract

The utility model relates to a cigarette rod diameter detection technical field, especially a modularization laser type cigarette rod diameter detection structure, including shell, set up detection hole on the shell, be provided with two laser parallel light source in the detection hole, be provided with two respectively with CMOS sensor of laser parallel light source adaptation in the detection hole, the high -performance MCU for signal processing is provided with in the shell, the clamping unit for clamping cigarette rod is provided with on the shell, the rotation unit is provided with on the shell, the rotation unit includes the rotator of installation on the shell, the rotator is installed with the rotating disc, the clamping unit is installed on the rotating disc through the elevating unit. The scheme provides a kind of modularization laser type cigarette rod diameter detection structure, solves the technical problem that sensor is usually fixed to single angle detection, its projection section will change, leads to single point measurement result cannot truly reflect the average diameter of cigarette.

Description

Technical Field

[0001] This utility model relates to the field of cigarette bar diameter detection technology, and in particular to a modular laser-type cigarette bar diameter detection structure. Background Technology

[0002] In the cigarette production process, especially in key stages such as rolling, receiving, and packaging, real-time and accurate detection of the cigarette's circumference or diameter is one of the core technical means to ensure the quality of the final product. By feeding the detection data back to the equipment control system (such as adjusting parameters like cutter head speed and air pressure), closed-loop control of production quality can be achieved, effectively avoiding the generation of batches of defective products. Therefore, measurement accuracy and reliability are crucial. Currently, most online diameter detection sensors used in the industry adopt fixed-installation laser measurement solutions. This type of solution has several inherent limitations in practical applications: First, the sensor is usually fixed at a single angle for detection. When the cigarette undergoes slight deflection or shaking during transport, its projected cross-section changes, causing the single-point measurement result to fail to accurately reflect the average diameter of the cigarette, and the measurement accuracy is easily affected by the cigarette's posture. Second, the cigarette pack is easily contaminated by tobacco shreds, dust, etc., in the detection environment, affecting the reception of the laser signal. Traditional sensors have complex structures, and cleaning and maintenance often require disassembling a large number of parts or even removing the entire unit, resulting in long downtime and affecting production efficiency. Furthermore, existing sensors are mostly custom-developed for specific cigarette machine models, and their mechanical interfaces and electrical communication protocols lack universality. This results in high costs and long development cycles when adapting or upgrading them to different cigarette machine models. Therefore, there is an urgent need in this field for a cigarette diameter detection sensor that can overcome the above-mentioned shortcomings. It should provide more stable and accurate measurement data, have an easy-to-maintain structural design, and possess good modular versatility to meet the high standards required by modern cigarette production. Utility Model Content

[0003] In view of this, the present invention provides a modular laser-type cigarette bar diameter detection structure, which aims to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A modular laser-based cigarette bar diameter detection structure includes a housing and a detection hole disposed on the housing. Two parallel laser light sources are disposed within the detection hole, and two CMOS sensor modules adapted to the parallel laser light sources are disposed within the detection hole. A high-performance MCU for signal processing is disposed inside the housing. The parallel laser light sources and the CMOS sensor modules are electrically connected, and both the parallel laser light sources and the CMOS sensors are communicatively connected to the main controller. The outer casing is provided with a clamping unit for clamping the cigarette stick, and the outer casing is provided with a rotating unit. The rotating unit includes a rotator mounted on the outer casing, and a rotating disk is mounted on the rotator. The clamping unit is mounted on the rotating disk through a lifting unit.

[0005] Preferably, the rotator includes a fixed ring nested on the outer shell, a rotating ring disposed on the fixed ring, the rotating ring being mounted on the fixed ring via a rotating wheel, the fixed ring being fixedly connected to the outer shell, and the outer wall of the rotating ring and the inner wall of the fixed ring being provided with rotating grooves for mounting the rotating wheel.

[0006] Preferably, the outer circumferential wall of the rotating disk is provided with teeth, the inside of the housing is provided with a power motor, the power output end of the power motor is rotatably connected to the top plate of the housing, and the power output end of the power motor is provided with a gear, which meshes with the teeth.

[0007] Preferably, the clamping unit includes a mounting plate connected to the lifting unit and a rotating motor mounted on the mounting plate. The power output end of the rotating motor is rotatably connected to the mounting plate. A clamping disc is fixedly mounted on the power output end of the rotating motor. A slide rail is provided on the clamping disc. A slide block is provided on the slide rail. A clamping claw is fixedly mounted on the slide block. A slot is provided on the clamping disc. A sliding column is provided on the clamping claw. The sliding column is slidably connected to the slot.

[0008] Preferably, there are four slide rails and four slide blocks, and each slide block is equipped with a clamping claw. The side of the clamping claw that contacts the tobacco stick is set to an arc shape that is adapted to the tobacco stick.

[0009] Preferably, the lifting unit includes a push rod, the power output end of the push rod is fixedly connected to the mounting plate, and a support rod is provided on one side of the push rod, the support rod being slidably connected to the power output end of the push rod.

[0010] Preferably, the slot is arc-shaped.

[0011] Compared with existing technologies, a modular laser-based cigarette bar diameter detection structure has the following positive effects: The laser parallel light source, CMOS sensor module, and main controller adopt an independent modular design and are connected via standardized electrical interfaces. When cleaning or maintenance is required, simply loosen the fixing screws on the housing to remove the entire detection unit from the rotating disk; no disassembly of the complex mechanical structure is necessary. Taking actual test data from a cigarette factory as an example, traditional sensor maintenance requires 45 minutes of downtime, while the maintenance time for this structure can be reduced to less than 12 minutes, significantly improving the overall efficiency of the equipment.

[0012] The rotating disk is driven by a motor through gear meshing, enabling stepless rotation from 0 to 360°, with the rotation speed dynamically adjusted according to the tobacco stick conveying speed. As the rotating disk rotates, the laser parallel light source, CMOS sensor module, and clamping unit mounted on it rotate synchronously around the tobacco stick axis. The laser source emits parallel beams of light towards the tobacco stick from different angles, while the CMOS sensor synchronously receives the projection signals at the corresponding angles. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the clamping unit of this utility model; Figure 3 This is a schematic diagram of the hidden part of the clamping unit of this utility model; Figure 4 This is a schematic diagram of the structure of this practical rotary device; Figure 5 This is a structural diagram of the overall hidden portion of the present invention; Reference numerals: 1. Outer shell; 2. Detection hole; 3. Laser parallel light source; 4. CMOS sensor; 5. Rotating disk; 6. Fixed ring; 7. Rotating ring; 8. Rotating wheel; 9. Tooth; 10. Gear; 11. Power motor; 12. Mounting plate; 13. Rotating motor; 14. Clamping disk; 15. Clamping claw; 16. Slot; 17. Sliding column; 18. Slide rail; 19. Slide seat; 20. Push rod; 21. Support rod. Detailed Implementation

[0015] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] Example like Figure 1-5 As shown, this embodiment provides a modular laser-based cigarette bar diameter detection structure, aiming to solve the problems of measurement accuracy being affected by posture interference, inconvenient maintenance, and poor versatility in traditional detection schemes. Its specific structure is as follows: The detection structure includes a housing 1, a detection hole 2, a laser parallel light source 3, a CMOS sensor module, a high-performance signal processing unit, a main controller, a clamping unit, a rotating unit, and a lifting unit. The housing 1 serves as the overall mounting base, integrating all functional components and providing protection. The detection hole 2 is located in the middle of the housing 1, allowing the cigarette bar to pass through and be detected. The laser parallel light source 3 works in conjunction with the CMOS sensor module to collect cigarette bar diameter data. The high-performance signal processing unit processes the detection signal in real time. The main controller enables coordinated control of all components. The clamping unit stably fixes the cigarette bar. The rotating unit drives the cigarette bar to rotate for multi-directional detection. The lifting unit adjusts the height of the cigarette bar to suit the detection position.

[0017] The outer casing 1 has a rectangular hollow structure with a horizontally penetrating detection hole 2 in the center to ensure that the cigarette stick does not collide with the hole wall during rotation. The inner wall of the detection hole 2 is polished. Two parallel laser light sources 3 and two CMOS sensor modules are installed on the inner walls of opposite sides of the detection hole 2, with their central axes collinear. Each parallel laser light source 3 and each CMOS sensor module are symmetrically installed. A high-performance MCU for signal processing is installed inside the outer casing 1. The parallel laser light sources 3 and the CMOS sensors 4 are electrically connected, and both the parallel laser light sources 3 and the CMOS sensors 4 are communicatively connected to the main controller.

[0018] The rotating unit includes a rotator, a rotating disk 5, a power motor 11, and a gear 10. The rotator consists of a fixed ring 6, a rotating ring 7, and rotating wheels 8. The fixed ring 6 is annular and is fixed to the middle of the side wall of the outer casing 1 by bolts. The inner wall of the fixed ring 6 has annular rotating grooves evenly distributed along the circumference, and multiple rotating wheels 8 are rolled and embedded in the rotating grooves. The rotating ring 7 is coaxially sleeved inside the fixed ring 6, and the outer wall has the same annular rotating grooves corresponding to the rotating groove positions. The wheel surfaces of the rotating wheels 8 simultaneously fit against the inner walls of the rotating grooves on both the fixed ring 6 and the rotating ring 7. This structure results in a low coefficient of friction for the rotating ring 7 around the axis of the fixed ring 6, smooth rotation without jamming, and extended service life of the rotator. The rotating disk 5 is a circular plate, and its outer edge is welded and fixed to the inner wall of the rotating ring 7; the outer circumferential wall of the rotating disk 5 has teeth 9 integrally formed to ensure smooth transmission. The power motor 11 is fixed inside the housing 1 by a motor bracket. The power output end of the motor extends vertically upward through the top plate of the housing 1 and is rotatably connected to the top plate by a bearing to reduce radial runout of the output end. A gear 10 is keyed to the output end of the power motor 11. The gear 10 is fully engaged with the teeth 9 of the rotating disk 5. When the power motor 11 is running, the rotating disk 5 is driven to rotate at a uniform speed through the gear 10, resulting in small transmission error. The positive effects of the rotating unit: The rotating disk 5 drives the subsequent lifting unit, clamping unit, and tobacco stick to rotate synchronously, causing the tobacco stick to rotate uniformly around its own axis. The laser parallel light source 3 can perform a 360° all-round scan of the circumference of the tobacco stick, and the CMOS sensor module continuously collects the projection data of different circumferential positions of the tobacco stick. The main controller performs weighted average calculation on multiple sets of data to obtain the average diameter value of the tobacco stick, effectively avoiding the cross-sectional projection deviation problem caused by tobacco stick deflection and shaking in traditional fixed single-point detection. The measurement accuracy of this rotating detection method is significantly better than that of traditional single-point detection, and the data stability is greatly improved, fundamentally solving the influence of tobacco stick posture interference on the detection results.

[0019] The clamping unit includes a mounting plate 12, a rotating motor 13, a clamping disk 14, a slide rail 18, a slide base 19, a clamping claw 15, a slot 16, and a sliding column 17. The mounting plate 12 is connected to the lifting unit and the rotating motor 13 is fixed by bolts. The power output end of the rotating motor 13 passes downward through the mounting plate 12 and is fixedly connected to the center of the clamping plate 14 through a coupling. The clamping plate 14 is circular, and multiple radial T-shaped slide rails 18 are evenly opened along the circumference on the top surface. The slide rails 18 have small clearance to ensure that the slide block 19 slides without jamming.

[0020] Each slide rail 18 has a slide block 19 slidably embedded in it. The top surface of the slide block 19 is fixed with a clamping claw 15 by screws. The side of the clamping claw 15 facing the cigarette is machined into an arc-shaped surface that fits the cigarette. Anti-slip texture is formed on the arc-shaped surface. Multiple clamping claws 15 are centrally symmetrically distributed and clamp the cigarette evenly from all sides, avoiding the cigarette offset caused by traditional two-point clamping. The arc-shaped surface design can prevent indentation on the surface of the cigarette and avoid damage to the cigarette. The anti-slip texture can ensure that there is no relative slippage when the cigarette rotates, ensuring the consistency of the test data. The clamping disc 14 has multiple arc-shaped slots 16 on its top surface, and the clamping claws 15 have cylindrical sliding pillars 17 integrally formed at their bottom. When the rotating motor 13 drives the clamping disc 14 to rotate, the sliding pillars 17 slide within the arc-shaped slots 16, and the multiple clamping claws 15 simultaneously contract to clamp the cigarette stick. When rotating in the opposite direction, the clamping claws 15 open to release the cigarette stick. The clamping force can be precisely controlled by the torque output of the motor, making it suitable for both regular and thin cigarette sticks, and highly versatile.

[0021] The lifting unit includes an electric push rod 20 and support rods 21. The bottom of the cylinder of the electric push rod 20 is fixed to the center of the top surface of the rotating disk 5 by bolts. The power output end of the electric push rod 20 is vertically upward and fixed to the bottom surface of the mounting plate 12. Support rods 21 are symmetrically arranged on both sides of the electric push rod 20. The support rods 21 are slidably connected to the power output end of the push rod 20. The support rods 21 can effectively reduce the shaking of the clamping unit during lifting and lowering, and improve the detection accuracy.

[0022] Workflow Cigarette stick positioning: The cigarette stick to be tested is sent to the inlet of the detection hole 2 by the cigarette machine conveying track. After the main controller receives the position signal, it controls the electric push rod 20 to start, driving the mounting plate 12 to rise to a position that matches the height of the cigarette stick conveying.

[0023] Cigarette stick clamping: The main controller controls the rotating motor 13 to rotate, the clamping plate 14 drives the sliding column 17 to slide along the arc-shaped slot 16, and the slide block 19 drives the clamping claw 15 to retract towards the center, so as to stably clamp the cigarette stick. Height adjustment: The electric push rod 20 is activated, which drives the mounting plate 12 to descend, so that the tobacco stick is accurately positioned in the detection hole 2, ensuring that the axis of the tobacco stick coincides with the axis of the detection hole 2.

[0024] Rotation detection: The main controller starts the laser parallel light source 3 and the CMOS sensor module, and simultaneously controls the power motor 11 to run, driving the rotating disk 5 to rotate at a constant speed. The cigarette stick rotates synchronously with the rotating disk 5. The CMOS sensor module continuously collects the projected images of the cigarette stick during the rotation process, quickly converts them into diameter data, and sends them to the main controller.

[0025] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular laser-based cigarette strip diameter detection structure, characterized in that, The device includes a housing (1) and a detection hole (2) on the housing (1). Two parallel laser light sources (3) are disposed inside the detection hole (2). Two CMOS sensors (4) are disposed inside the detection hole (2) and are respectively adapted to the parallel laser light sources (3). A high-performance MCU for signal processing is disposed inside the housing (1). The parallel laser light sources (3) and the CMOS sensors (4) are electrically connected. The parallel laser light sources (3) and the CMOS sensors (4) are both communicatively connected to the main controller. The outer shell (1) is provided with a clamping unit for clamping cigarette sticks. The outer shell (1) is provided with a rotating unit. The rotating unit includes a rotator installed on the outer shell (1). A rotating disk (5) is installed on the rotator. The clamping unit is installed on the rotating disk (5) through a lifting unit.

2. The modular laser-based cigarette strip diameter detection structure according to claim 1, characterized in that, The rotator includes a fixed ring (6) nested on the outer shell (1), and a rotating ring (7) is provided on the fixed ring (6). The rotating ring (7) is mounted on the fixed ring (6) by a rotating wheel (8). The fixed ring (6) is fixedly connected to the outer shell (1). The outer wall of the rotating ring (7) and the inner wall of the fixed ring (6) are provided with rotating grooves for mounting the rotating wheel (8).

3. The modular laser-based cigarette strip diameter detection structure according to claim 1, characterized in that, The outer circumferential wall of the rotating disk (5) is provided with teeth (9), and the inside of the outer shell (1) is provided with a power motor (11). The power output end of the power motor (11) is rotatably connected to the top plate of the outer shell (1). The power output end of the power motor (11) is provided with a gear (10), and the gear (10) meshes with the teeth (9).

4. The modular laser-based cigarette strip diameter detection structure according to claim 1, characterized in that, The clamping unit includes a mounting plate (12) connected to the lifting unit and a rotating motor (13) mounted on the mounting plate (12). The power output end of the rotating motor (13) is rotatably connected to the mounting plate (12). A clamping disk (14) is fixedly mounted on the power output end of the rotating motor (13). A slide rail (18) is provided on the clamping disk (14). A slide block (19) is provided on the slide rail (18). A clamping claw (15) is fixedly mounted on the slide block (19). A slot (16) is provided on the clamping disk (14). A sliding column (17) is provided on the clamping claw (15). The sliding column (17) is slidably connected to the slot (16).

5. The modular laser-based cigarette strip diameter detection structure according to claim 4, characterized in that, There are four slide rails (18) and four slide blocks (19). Each slide block (19) is equipped with a clamping claw (15). The side of the clamping claw (15) that is used to contact the cigarette stick is set to an arc shape that is adapted to the cigarette stick.

6. The modular laser-based cigarette strip diameter detection structure according to claim 4, characterized in that, The lifting unit includes a push rod (20), the power output end of the push rod (20) is fixedly connected to the mounting plate (12), and a support rod (21) is provided on one side of the push rod (20), and the support rod (21) is slidably connected to the power output end of the push rod (20).

7. The modular laser-based cigarette strip diameter detection structure according to claim 4, characterized in that, The slot (16) is set to be arc-shaped.

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