Cigarette force collapse loose end determination method and device

Abstract

The invention provides a cigarette force collapse loose end determination method and device, and relates to the technical field of cigarette detection. The device comprises a vertical stress module, a mechanical sensing module, a dynamic monitoring module and a multi-direction stress simulation module. The detection method comprises the following steps: adjusting device parameters, carrying out multi-cycle vertical falling on cigarettes, measuring loose head change, calculating mechanical parameters such as compression modulus and rebound rate, and establishing a multiple linear regression model and a comprehensive evaluation index in combination with dynamic deformation and acoustic emission signals. The scheme can be adapted to conventional, fine and heat-not-burn cigarettes and electronic cigarette cartridges, multi-dimensional quantitative evaluation of force collapse resistance is realized by simulating a multi-directional stress scene and intelligent data modeling, the detection blank is filled, technical support is provided for cigarette quality improvement, and the method has the characteristics of simplicity and convenience in operation, accuracy in detection and wide application.

Description

TECHNICAL FIELD

[0001] The present document relates to the technical field of cigarette force collapse hollow detection, and particularly relates to a cigarette force collapse hollow detection method and device. BACKGROUND

[0002] Cigarette hollow is a key indicator affecting the quality of cigarettes, and is closely related to the tobacco filling structure and mechanical properties. During transportation, storage and consumption, the tobacco is prone to collapse under dynamic external forces such as impact, vibration or human tobacco, which leads to the expansion of the hollow and seriously affects the consumer experience. The existing detection method (such as GB / T 22838.9) can only detect static hollow, and cannot simulate the dynamic force process in the actual scene, making it difficult to accurately evaluate the anti-collapse ability of the cigarette under non-steady state conditions.

[0003] In recent years, with the popularity of new products such as medium cigarettes, slim cigarettes and heat-not-burn cigarettes, the structural differences of different specifications of cigarettes have put forward higher detection requirements for force collapse resistance. The traditional single-dimensional detection method cannot meet the industry demand, and there is an urgent need for a detection technology that covers dynamic force simulation, mechanical property analysis and multi-parameter correlation evaluation. In addition, the existing device lacks the integration capabilities of cigarette drop posture control, multi-directional force simulation and intelligent data processing, resulting in deviations between the detection results and the actual scene, and making it difficult to accurately guide the optimization of cigarette formula and process improvement.

[0004] Therefore, it is a key technical requirement to develop a cigarette force collapse hollow detection method and device that can simulate real force scenarios, quantify the dynamic mechanical response of tobacco and realize multi-specification adaptation to improve the quality of cigarette products. SUMMARY

[0005] According to the embodiments of the present application, a cigarette force collapse hollow detection method and device are provided to solve the above problems.

[0006] According to the embodiments of the present application, a cigarette force collapse hollow detection device is provided, which comprises:

[0007] A vertical force module includes a vertically arranged cigarette guide pipe and a lower cigarette collection tray. The length, inner diameter of the guide pipe and the spacing of the tray are adjustable, and the inner wall of the guide pipe is provided with an anti-rotation guide structure to ensure the vertical drop posture of the cigarette;

[0008] A mechanical sensing module is used for integrating a pressure sensor and a displacement sensor in the tray, for collecting the peak pressure F max and the compression amount Δh when the cigarette is impacted, and synchronously calculating the dynamic compression modulus and the quasi-static compression modulus of the tobacco;

[0009] Dynamic monitoring module: including a high-speed camera and an acoustic emission sensor, respectively used for acquiring deformation sequence and acoustic emission signal at the moment of cigarette impact, the high-speed camera is equipped with an AI image algorithm module, which can identify the tobacco slip trajectory of cigarette end in real time;

[0010] Multi-directional force simulation module: horizontal impact component and vibration component can be selected and matched, which are used for simulating multi-directional force scenarios of cigarettes.

[0011] According to the embodiment of the present application, a cigarette force collapse empty head determination method is provided, comprising:

[0012] S1, adjusting the length, inner diameter and tray spacing of the guide pipe according to the cigarette specification, calibrating the sensor, and obtaining L 短支 ;

[0013] S2, dropping the cigarette vertically through the guide pipe for n times, measuring the initial empty head average L0 and the empty head average Lx after each stress;

[0014] S3, calculating the compression modulus E and the resilience rate through the mechanical sensing module;

[0015] S4, obtaining v, θ and acoustic emission characteristic parameters through the dynamic monitoring acquisition module;

[0016] S5, establishing the correlation model of the empty head change value ΔL x = L x -L0 and each monitoring parameter, and calculating the comprehensive evaluation index;

[0017] wherein, Δh residual is residual deformation.

[0018] By adopting the embodiment of the present application, the following beneficial effects are achieved:

[0019] The vertical force module with anti-rotation guide structure is arranged to ensure the vertical dropping posture of the cigarette, the dynamic and quasi-static compression modulus, resilience energy and other mechanical parameters are calculated synchronously by the mechanical sensing module, the deformation sequence and acoustic signals are captured in real time by the high-speed camera and acoustic emission sensor, and the AI image algorithm module is equipped to analyze the tobacco slip trajectory, at the same time, the multi-directional force simulation module is used to simulate the composite stress scenarios such as transportation vibration and consumer tobacco, so that the full-dimensional detection from static empty head to dynamic mechanical response is realized; the detection method quantifies the force collapse resistance through multi-cycle vertical dropping, multi-parameter correlation modeling and comprehensive evaluation index (FCI), which can be adapted to conventional, slim, heat-not-burn cigarettes and electronic cigarette cartridges, fills the gap of cigarette force collapse resistance quantification evaluation, provides a scientific basis for cigarette formula optimization and quality control, and has the advantages of high equipment integration, comprehensive detection dimension, strong result reliability, simple operation, accurate detection, wide application, simulation of real stress scenarios, and accurate guidance for improving cigarette quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the one or more embodiments of the present specification or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present specification, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 The frame diagram of the cigarette force collapse empty head measuring device according to the embodiment of the present application is shown in

[0022] Figure 2 The schematic diagram of the cigarette force collapse empty head measuring method according to the embodiment of the present application is shown in DETAILED DESCRIPTION

[0023] In order to make the person skilled in the art better understand the technical solutions in the one or more embodiments of the present specification, the technical solutions in the one or more embodiments of the present specification will be clearly and completely described below in combination with the drawings in the one or more embodiments of the present specification. Obviously, the described embodiments are only some embodiments of the present specification, not all embodiments. Based on the one or more embodiments of the present specification, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present document.

[0024] Device embodiment

[0025] According to the embodiment of the present application, a cigarette force collapse empty head measuring device is provided, Figure 1 The frame diagram of the cigarette force collapse empty head measuring device according to the embodiment of the present application is shown in Figure 1 The cigarette force collapse empty head measuring device according to the embodiment of the present application specifically includes:

[0026] The vertical force receiving module 10 includes a vertically arranged cigarette guide pipe and a lower cigarette collecting tray. The length, inner diameter and tray spacing of the guide pipe can be adjusted, and the inner wall of the guide pipe is provided with an anti-rotation guide structure to ensure the vertical falling posture of the cigarette.

[0027] The cigarette guide pipe is made of glass material, with a length of 800 mm and an inner diameter of 8 mm (adapted to conventional cigarettes). The inner wall is provided with a spiral anti-rotation protrusion (height 1 mm, spacing 5 mm) to ensure that the rotation angle of the cigarette is less than 5° when it falls vertically.

[0028] The tray is made of stainless steel material, with a 5 mm thick silica gel buffer layer (Shore hardness 35 degrees) on the surface, and a spacing of 95 mm from the bottom of the guide pipe.

[0029] Mechanical sensing module 12, used for pressure sensor and displacement sensor integrated in the tray, used to collect the peak pressure F when the cigarette hits max and compression Δh, and simultaneously calculate the dynamic compression modulus and quasi-static compression modulus of tobacco;

[0030] The tray integrates a pressure sensor (range 0-50N, accuracy 0.1N) and a displacement sensor (accuracy 0.01mm), which is connected to the industrial computer via a data cable to calculate the dynamic compression modulus in real time. Among them L 短支 is the length of the cigarette excluding the filter rod section, and S is the cross-sectional area of ​​the short section.

[0031] The dynamic monitoring module 14 includes a high-speed camera and an acoustic emission sensor, which are used to respectively obtain the deformation sequence and acoustic emission signal of the cigarette at the moment of impact. The high-speed camera is equipped with an AI image algorithm module to identify the sliding trajectory of the tobacco at the end of the cigarette in real time;

[0032] A high-speed camera (frame rate 2000fps) is installed on the side of the duct and equipped with an AI algorithm module to identify the sliding trajectory of tobacco in real time and calculate the change rate of the short end depth. and deformation angle θ, acoustic emission sensors (frequency range 20-80kHz) are arranged around the pallet to extract the main frequency, energy value and ring count of the acoustic wave signal.

[0033] The multi-directional force simulation module 16 includes an optional horizontal impact component and a vibration component, which is used to simulate the multi-directional force scenario of the cigarette;

[0034] In the embodiment of the present invention, the horizontal impact component is provided as a detachable roller device, which is installed on the side of the conduit. The rubber baffle on the inner wall of the roller has a hardness of 55 degrees Shore and the rotation speed can be adjusted to 8m / s to simulate horizontal impact. A three-dimensional vibration table (frequency 20Hz, amplitude 0.5mm) is integrated under the pallet to simulate transportation vibration.

[0035] The vertical force module consists of a vertical cigarette duct and a tray below. The inner wall of the duct is equipped with an anti-rotation guide structure with adjustable parameters. The tray integrates the pressure and displacement sensors of the mechanical sensing module. The high-speed camera and acoustic emission sensor of the dynamic monitoring module are respectively arranged on the side of the duct and around the tray to capture deformation and sound wave signals. The horizontal impact component and vibration component of the multi-directional force simulation module are attached to the duct or tray.

[0036] Method Example

[0037] According to an embodiment of the present invention, a method for measuring the collapse of cigarettes is provided. Figure 2 This is a flow chart of a method for measuring the collapse of cigarettes according to an embodiment of the present invention. Figure 2 As shown, the method for measuring the collapse of cigarettes according to the embodiment of the present invention specifically includes:

[0038] S1, adjust the length, inner diameter and tray spacing of the guide pipe according to the cigarette specification, calibrate the sensor, and obtain L 短支 ;

[0039] According to the cigarette type (such as the inner diameter of a slim cigarette being 6.5mm), the inner diameter and length of the guide pipe are adjusted, the tray spacing is set to 1.1 times the length of the cigarette (such as 84mm cigarette being set to 92mm), the pressure sensor is calibrated by a standard weight (0-50N), the displacement sensor is calibrated by a standard gauge block (0-10mm), and the high-speed camera is corrected by a calibration board (accuracy 0.01mm).

[0040] S2, the cigarette is vertically dropped through the guide pipe for n times, and the initial empty head average L0 and the empty head average Lx after each stress are measured;

[0041] The cigarette used in the embodiment of the application needs to be pre-processed, specifically including:

[0042] Sample processing and information collection: collect commercially available A and B brand cigarettes, and make the to-be-tested cigarettes balance in an environment of 22℃±2℃ and relative humidity of 60%±5% for 48h. Collect sample information, and the lengths of the A and B brand cigarettes are both 84.0mm, and the lengths of the filter rods are both 25.0mm;

[0043] Sample determination: select 20 cigarettes as a group of samples, and use a cylindrical millimeter ruler visual method or an infrared photoelectric empty head detection method to measure the initial empty head average L0 of the cigarettes. The cigarettes are sequentially placed into a self-made testing device, the cigarettes are vertically dropped through the guide pipe to the tray, the cigarettes at the tray are collected, the sample is circulated for 10 times, and the empty head averages L x

[0044] S3, calculate the compression modulus E, the rebound rate and the related parameters of the tobacco layer interlayer bonding force through the mechanical sensing module;

[0045] Dynamic compression modulus E: according to the formula , wherein L 短支 is the length of the cigarette after removing the filter rod section, and S is the cross-sectional area of the short section;

[0046] Δhresidual is the residual deformation;

[0047] The tobacco layer interlayer bonding force is obtained by peeling test, and the calculation formula is F 剥离 is the peeling peak value, r is the radius of the cigarette, and h is the height of the peeling section.

[0048] S4, obtain v, θ and acoustic emission characteristic parameters through the dynamic monitoring acquisition module;

[0049] S5. Establish short position change value ΔL x =L x -L0 and the correlation model of each monitoring parameter, and calculate the comprehensive evaluation index;

[0050] The association model includes the multiple linear regression equation:

[0051] ΔL x =α0+∑α i Parameter i, where parameter i includes: E, rebound rate, v and acoustic emission energy value.

[0052] The comprehensive evaluation index is calculated by weighting after standardizing each parameter, and the formula is:

[0053] FCI=FCI=∑(ω i ·Z i );

[0054] where ω i is the weight parameter, determined by the hierarchical analysis method, Z i To standardize parameter values, the weight determination process of the AHP method is as follows:

[0055] Step 1: Establish a hierarchical model and decompose the comprehensive evaluation problem into the following levels:

[0056] Target layer: Comprehensive evaluation of cigarette force collapse resistance (FCI).

[0057] Criterion layer: key parameters affecting FCI, such as compression modulus E (reflecting tobacco structural stiffness), spring rate (reflecting tobacco elastic recovery ability), short change rate v (reflecting dynamic deformation sensitivity), and acoustic emission energy (reflecting the degree of tobacco breakage);

[0058] Scenario level: different cigarette samples or test conditions;

[0059] Step 2: Construct a judgment matrix and invite industry experts or quality control engineers to compare the relative importance of each parameter pairwise, using a 1-9 scale to assign values;

[0060] Step 3: Calculate the weight vector

[0061] Step 3.1 calculates the normalized value of each column of the judgment matrix;

[0062] Step 3.2 calculates the average value of each row to obtain the initial weight vector ω;

[0063] Step 4: Consistency check

[0064] Multiply the judgment matrix A by the weight vector ω to obtain Aω;

[0065] Calculate the consistency index CI and consistency ratio CR:

[0066]

[0067] Step 5, according to the AHP calculation results.

[0068] Further, the weight can be fine-tuned according to different cigarette types (such as slim cigarettes vs. regular cigarettes), for example, slim cigarettes pay more attention to the rebound rate (the weight is increased to 0.3).

[0069] When the multi-direction force simulation module applies an external force different from the vertical direction to the cigarette, the L x , F max and dynamic deformation parameters under the corresponding working condition are recorded synchronously.

[0070] The number of empty head detection samples is not less than a preset number, and the mean value is taken to meet the repeatability requirement.

[0071] The method adjusts the device parameters to adapt to different specifications of cigarettes, including regular cigarettes, slim cigarettes, heat-not-burn cigarettes and electronic cigarette cartridges.

[0072] By adopting the embodiment of the present application, the following beneficial effects are achieved:

[0073] By using multi-cycle vertical drop, multi-parameter correlation modeling and comprehensive evaluation index (FCI) to quantify the force collapse resistance, the method can adapt to regular, slim, heat-not-burn and electronic cigarette cartridges, filling the gap in the quantitative evaluation of cigarette force collapse resistance, providing a scientific basis for cigarette formula optimization and quality control. The method has the advantages of high equipment integration, comprehensive detection dimension, strong result reliability, simple operation, precise detection, wide application, simulation of real stress scenarios, and precise guidance for improving cigarette quality.

[0074] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for measuring the collapse of cigarettes, characterized in that include: The vertical force-bearing module includes a vertically arranged cigarette duct and a cigarette collection tray below. The length, inner diameter and spacing between the ducts are adjustable, and an anti-rotation guide structure is provided on the inner wall of the duct to ensure that cigarettes fall vertically. Mechanical sensing module, used for pressure sensor and displacement sensor integrated in the tray, used to collect the peak pressure F when the cigarette hits max and compression Δh, and simultaneously calculate the dynamic compression modulus and quasi-static compression modulus of tobacco; Dynamic monitoring module: This includes a high-speed camera and an acoustic emission sensor, which are used to obtain the deformation sequence and acoustic emission signal of the cigarette at the moment of impact, respectively. The high-speed camera is equipped with an AI image algorithm module to identify the sliding trajectory of the tobacco at the cigarette end in real time; Multi-directional force simulation module: includes optional horizontal impact components and vibration components, used to simulate multi-directional force scenarios of cigarettes; The vertical force module consists of a vertical cigarette duct and a tray below. The inner wall of the duct is equipped with an anti-rotation guide structure with adjustable parameters. The tray integrates the pressure and displacement sensors of the mechanical sensing module. The high-speed camera and acoustic emission sensor of the dynamic monitoring module are respectively arranged on the side of the duct and around the tray to capture deformation and sound wave signals. The horizontal impact component and vibration component of the multi-directional force simulation module are attached to the duct or tray.

2. The device according to claim 1, characterized in that The mechanical sensing module is also used to calculate the compression modulus of tobacco Among them L 短支 is the length of the cigarette excluding the filter rod section, and S is the cross-sectional area of ​​the short section.

3. The device according to claim 1, characterized in that The dynamic monitoring module uses a high-speed camera to analyze the change rate of the cigarette empty end depth. and deformation angle θ, and extract the main frequency, energy value and ring count of the acoustic wave signal through the acoustic emission sensor.

4. A method for measuring the force collapse of cigarettes based on the device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Adjust the tube length, inner diameter and tray spacing according to the cigarette specifications, calibrate the sensor, and obtain L 短支 ; S2. Drop the cigarette vertically through the tube for n cycles, and measure the initial short end mean L0 and the short end mean Lx after each force application; S3. Calculating the compression modulus E, rebound rate, and interlayer bonding force parameters of tobacco using a mechanical sensing module; S4. Acquire v, θ and acoustic emission characteristic parameters through a dynamic monitoring acquisition module; S5. Establish short position change value ΔL x =L x -L0 and the correlation model of each monitoring parameter, and calculate the comprehensive evaluation index; in, Δhresidual is the residual deformation.

5. The method according to claim 4, characterized in that The association model includes the multiple linear regression equation: ΔL x =α0+∑α i Parameter i, where parameter i includes: E, rebound rate, v and acoustic emission energy value.

6. The method according to claim 4, characterized in that The comprehensive evaluation index is calculated by weighting after standardizing each parameter, and the formula is: FCI=FCI=∑(ω i ·WITH i ); where ω i is the weight parameter, Z i is the standardized parameter value.

7. The method according to claim 4, characterized in that When the multi-directional force simulation module applies external forces different from the vertical direction to the cigarette, the L under the corresponding working conditions is recorded simultaneously. x 、F max and dynamic deformation parameters.

8. The method according to claim 4, characterized in that The interlayer bonding strength of the tobacco shreds is obtained by peeling test, and the calculation formula is: F 剥离 is the peeling peak, r is the cigarette radius, and h is the peeling section height.

9. The method according to claim 4, characterized in that The sample size of the short position detection is not less than the preset number, and the average is taken to meet the repeatability requirement.

10. The method according to claim 4, characterized in that The method adapts to cigarettes of different specifications by adjusting device parameters, including regular cigarettes, slim cigarettes, heat-not-burn cigarettes and electronic cigarette cartridges.

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