Multifunctional detection method, system and device for combustion performance of cigar

Abstract

The invention relates to the technical field of tobacco combustion performance detection, and discloses a multifunctional detection method, system and device for cigar combustion performance, and the method comprises the following steps: setting the temperature of a sealed constant temperature test box and the content of imported oxygen, cutting cigars into sample strips with fixed length and width, pre-treating the cigar leaf sample strips, and detecting the cigar combustion performance according to the pre-treated cigar leaf sample strips. Fixing the pre-treated cigar sample strip on a clamping device; the igniter ignites and heats the sample strip, meanwhile, the infrared detector starts timing, and the experiment is ended when the set combustion experiment time or the ignition point of the sample strip is extinguished; taking out the sample strip, and calculating experimental data of the sample; and measuring the oxygen index of the cigar tobacco leaves. The system comprises a tobacco initialization module, a timing calculation module and a critical point calculation module. According to the invention, by controlling variables and standardizing the sample strip, the influence of external factors on the test result can be eliminated, so that cigars in different batches or from different sources can be compared under the same condition.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco leaf combustion performance detection, and in particular to a multifunctional detection method, system and device for cigar combustion performance. Background Art

[0002] The combustibility of cigars refers to the ability of cigars to maintain uniform and continuous burning after being lit. The combustibility of cigar tobacco leaves is one of the key indicators for evaluating the quality of cigars. Experiments show that the combustion characteristics of tobacco leaves have a significant impact on the sensory quality and have a key impact on the taste and aroma of cigars. Good combustibility not only affects the taste and experience of cigars, but is also directly related to the quality of cigars and consumer satisfaction; the combustibility of cigars directly affects the smoking experience. Cigars with good combustibility and uniform burning can provide stable smoke and consistent taste, and the ash can form a beautiful ash line, allowing smokers to enjoy the complex flavor of cigars and the joy of holding ash. On the contrary, the substances contained in tobacco leaves with poor combustibility cannot be fully decomposed, the potential aroma components are not fully released, and a variety of unpleasant odors will be produced, affecting the industrial availability of tobacco leaves; and cigars with uneven burning may cause "running fire" or oblique burning (that is, one side of the cigar burns faster than the other side), affecting the taste and causing waste. High-quality cigars usually use tobacco leaves of uniform thickness, which can provide consistent burning speed and temperature during the burning process, ensuring the overall quality of the cigar. Cigars with poor burning properties are easy to extinguish and need to be relighted frequently, which is not only troublesome but also affects the smoker's experience. Good burning properties can improve consumer satisfaction and increase brand loyalty; the burning properties of cigars are judged by measuring the length of cigar burning in a certain period of time. Generally speaking, cigars with uniform and moderate burning speeds are considered to have good burning properties. The burning speed is affected by the oxygen content in the air. Due to different oxygen contents at different air flow rates or different altitudes, the tested burning data has the problem of poor comparability.

[0003] Prior art 1, Chinese patent, application number 202311457996.4 discloses a cigar burning rate and ash detection device and method, including the following steps: screening of cigars and tobacco leaves before the experiment, pre-treatment preparation; method adjustment and device pre-experimental preparation; cigar combustibility detection and smoke capture; cigar tobacco leaf strip combustibility detection; cigar ash collection and determination; cigar burning state, ash image processing and data analysis. Although it solves the problem that the traditional technology of determining the combustion performance of cigars is mostly determined by measuring the element content in cigar tobacco leaves, indirectly judging by the ratio of the content of combustion-supporting elements to flame-retardant elements, or subjectively scoring the burning rate, ash color and smoldering properties of cigars based on sensory evaluation, which lacks objectivity, accuracy and directness; however, its detection results may be affected by factors such as sample preparation and instrument accuracy.

[0004] Prior art 2, Chinese patent, application number 202311509249.0 discloses a rapid detection method for the temperature distribution of cigars during continuous smoking, including the following steps: determination of temperature distribution detection points; translational averaging of the original temperature data of repeated tests; completion of the temperature curve of each depth interpolation point; and obtaining the temperature field distribution. Although a standardized method for detecting the temperature distribution of cigars during continuous smoking is provided, the temperature curves of all depths can be obtained in one test, and there is no need to conduct a test for each depth. This can reduce the consumption of cigars during the test and quickly complete the detection of the temperature distribution of cigars. The standardized detection and data preprocessing methods can provide more abundant information for the subsequent analysis of the detector, and provide basic data support for the study of the combustion mechanism and smoke generation of cigars; however, the dynamic change of temperature may increase the complexity of the temperature distribution, thereby placing higher requirements on the accuracy and stability of the detection method.

[0005] Prior art three, Chinese patent, application number 202210086978.9 discloses a synergist for improving the combustibility and ash ash value of fermented cigar tobacco leaves and its use method, the synergist includes an enzyme preparation and a combustion enhancer; the enzyme preparation includes 0.3-0.5 parts of protease and 0.1-0.3 parts of reducing sugar by weight; the combustion enhancer includes 5-10 parts of water-soluble magnesium salt, 3-7 parts of water-soluble potassium salt, and 2-5 parts of chitosan by weight; the method of using the synergist is to first plant the enzyme preparation working solution and the combustion enhancer working solution, take the fermented cigar tobacco leaves and soak them; after drying, spray the combustion enhancer working solution several times; dry and control the moisture content. Although it can significantly improve the combustion performance of cigar tobacco leaves, the ash ash value is higher, and the aroma released by combustion is improved; but its practicality for other types of tobacco or tobacco leaves is limited.

[0006] At present, the existing technologies 1, 2 and 3 have the problem that the combustion speed is affected by the oxygen content in the air, and the combustion data tested at different air flow rates or at different altitudes have poor comparability due to different oxygen contents. Therefore, the present invention provides a multifunctional detection method, system and device for the combustion performance of cigars. Summary of the invention

[0007] The main purpose of the present invention is to provide a multifunctional detection device for the combustion performance of cigars and a method for using the same, so as to solve the problem in the prior art that the combustion speed is affected by the oxygen content in the air, and the combustion data tested are poorly comparable due to different oxygen contents at different air flow rates or at different altitudes.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A multifunctional detection method for the combustion performance of cigars, comprising:

[0010] Setting the temperature of the sealed constant temperature test box and the inlet oxygen content, cutting the cigar into sample strips of fixed length and width, pre-treating the cigar leaf sample strips, and fixing the pre-treated cigar sample strips on the clamp;

[0011] The igniter ignites and heats the sample strip, and the infrared detector starts timing at the same time, and the experiment ends when the set combustion test time or the burning point of the sample strip is extinguished; the sample strip is taken out and the experimental data of the sample is calculated;

[0012] The oxygen index of cigar tobacco leaves is measured; if the sample fails to burn continuously, the oxygen concentration is gradually increased until the critical point at which the sample can continue to burn for 2 seconds; if the sample continues to burn for more than 10 seconds or burns to the bottom of the sample, the oxygen concentration is reduced until the critical point is found. The critical point obtained is the oxygen index of cigar tobacco leaves.

[0013] As a further improvement of the present invention, the process of pretreating the cigar tobacco leaf sample strips comprises the following steps:

[0014] Set the temperature range of the sealed constant temperature test box to 10-50 degrees; set the inlet oxygen content;

[0015] Cut the cigar into sample strips of fixed length and width, with the number of sample strips for each test sample being no less than 6; the sample strips are cut in one of the following directions: parallel to the leaf vein direction, perpendicular to the leaf vein direction, or at an angle of 45 degrees to the leaf vein direction;

[0016] The pretreatment of the cigar tobacco leaf sample strip is to balance the sample strip under temperature and humidity for no less than 24 hours; the temperature is 20-30°C and the relative humidity is 40-70%; the cigar tobacco leaf sample strip is fixed on the clamp and kept constant for 5-10 minutes to stabilize the temperature and oxygen content of the multifunctional detection device for the combustion performance of cigar tobacco.

[0017] As a further improvement of the present invention, the inlet oxygen content is set constant for 10-30 minutes, the oxygen content range is 0-100%; the oxygen pressure is 5-40 kPa.

[0018] As a further improvement of the present invention, the process of conducting the sample strip ignition point experiment includes the following steps:

[0019] Start the ignition program, the igniter starts to heat up to the set ignition temperature, and control the igniter to rise to contact with the bottom of the sample strip. Set the ignition temperature of the ignition program to 300-500℃, and the ignition time to 2-10s. After reaching the set ignition time, stop the ignition program, and the igniter descends and cools down;

[0020] When the ignition program is detected to be started, the timing program is started at the same time, and the infrared detector starts timing until the set combustion test time or the burning point of the test sample is extinguished, the test is ended and the timing is stopped, and the sample test strip is taken out;

[0021] Measure the burning length of the sample strip taken out, calculate the sample smoldering time and smoldering uniformity; calculate the burning rate and burning uniformity of the sample, and record the calculated sample test data.

[0022] As a further improvement of the present invention, the ignition program control formula is:

[0023]

[0024] Where T(x, t) represents the temperature distribution of the igniter at position x and time t; K represents the thermal diffusion coefficient, which is related to the thermal conductivity of the igniter material; η represents the heating fluctuation amplitude, which describes the periodic fluctuations in the heating process; ω represents the heating fluctuation frequency; λ represents the spatial attenuation coefficient, which describes the attenuation of heat with distance; σ represents the random fluctuation intensity; W(t) represents the standard Wiener process, which is used to describe the random noise in the heating process;

[0025] The control formula of the igniter rising height h(t):

[0026]

[0027] Where h(t) represents the height of the igniter at time t; h0 represents the initial height of the igniter; γ represents the saturation value of the rising height; τ represents the time constant, which controls the rising speed; ( represents the error function amplitude; erf(·) represents the Gaussian error function; t c represents the central time point; σ t Represents the time standard deviation.

[0028] As a further improvement of the present invention, the combustion experiment timing and detection formula is:

[0029]

[0030] In the formula, Δt represents the effective combustion time; represents the wavelet transform of the infrared detection signal I(t), a is the scale parameter, b is the translation parameter; I(t) represents the detection signal intensity of the infrared detector at time t; t1 represents the start time of the ignition program; t2 represents the end time of the combustion experiment;

[0031] The calculation formula of combustion uniformity U is:

[0032]

[0033] Wherein, U represents the combustion uniformity; L represents the total combustion length of the sample strip; (x) represents the infrared detection signal intensity at position x; represents the second-order derivative of the infrared detection signal intensity; β represents the weight coefficient; D f represents the fractal dimension, which describes the complexity of the combustion path; ACF(I(x), Δx) represents the spatial autocorrelation function, which describes the correlation of the signal in space;

[0034] The calculation formula of burning rate V is:

[0035]

[0036] In the formula, V represents the burning rate; Δ represents the effective burning time; E a represents the combustion activation energy; R represents the universal gas constant; T avg represents the average temperature during the combustion process; χ represents the nonlinear correction coefficient; Li2(·) represents the second-order polylogarithmic function; T max Indicates the highest temperature during the combustion process; T min Indicates the lowest temperature during the combustion process.

[0037] As a further improvement of the present invention, the process of calculating the sample test data includes the following steps:

[0038] Measure the sample strip taken out and record its burning length as L; calculate the sample smoldering time and smoldering uniformity;

[0039] Calculate the burning rate and combustion uniformity of the sample;

[0040] Establish a mapping relationship table between sample combustion length and sample smoldering time, smoldering uniformity, combustion rate and combustion uniformity, and record the calculated sample test data.

[0041] As a further improvement of the present invention, the process of measuring the oxygen index of cigar tobacco leaves comprises the following steps:

[0042] Setting the temperature of the sealed constant temperature test box and the inlet oxygen content, cutting the cigar into sample strips of fixed length and width, pre-treating the cigar leaf sample strips, and fixing the pre-treated cigar sample strips on the clamp;

[0043] The igniter ignites and heats the sample strip, and the infrared detector starts timing at the same time, setting the ignition temperature to 500°C and the ignition time to 5s;

[0044] If the sample fails to continue burning, the cigar tobacco leaf sample strips are pretreated again, the total air pressure is maintained at 101.3 kPa, and the oxygen concentration is gradually increased by 0.1% each time until the critical point at which the sample can continue to burn for 2 seconds; if the sample continues to burn for more than 10 seconds or burns to the bottom of the sample, the oxygen concentration is reduced by 0.5% each time until the critical point is found; the critical point obtained is the cigar tobacco leaf oxygen index.

[0045] To achieve the above object, the present invention also provides the following technical solutions:

[0046] A multifunctional detection system for the combustion performance of cigars, which is applied to the multifunctional detection method for the combustion performance of cigars, and the multifunctional detection system for the combustion performance of cigars comprises:

[0047] The tobacco leaf initialization module is used to set the temperature of the sealed constant temperature test box and the inlet oxygen content, cut the cigar into sample strips of fixed length and width, pre-treat the cigar leaf sample strips, and fix the pre-treated cigar leaf sample strips on the clamp;

[0048] The timing calculation module is used for the igniter to ignite and heat the sample strip, and the infrared detector starts timing at the same time, and ends the experiment when the set combustion test time or the burning point of the sample strip is extinguished; the sample strip is taken out and the experimental data of the sample is calculated;

[0049] The critical point calculation module is used to measure the oxygen index of cigar tobacco leaves. If the sample fails to burn continuously, the oxygen concentration is gradually increased until the critical point at which the sample can continue to burn for 2 seconds. If the sample continues to burn for more than 10 seconds or burns to the bottom of the sample, the oxygen concentration is reduced until the critical point is found. The critical point obtained is the oxygen index of the cigar tobacco leaves.

[0050] To achieve the above object, the present invention also provides the following technical solutions:

[0051] A multifunctional detection device for the combustion performance of cigars, which is applied to the multifunctional detection method for the combustion performance of cigars, and the multifunctional detection device for the combustion performance of cigars comprises: a sealed constant temperature test box, an infrared detector, a blade holder, a sample strip, an igniter, an air inlet and an air outlet;

[0052] Among them, an infrared detector is arranged on one side of the sealed constant temperature test box, a blade holder is arranged on the top of the sealed constant temperature test box along the detection direction of the infrared detector, an igniter is arranged at the corresponding bottom of the blade holder, and a sample strip is arranged between the blade holder and the igniter; an air inlet is arranged at the bottom edge of the sealed constant temperature test box in a direction parallel to the igniter, and an air outlet is arranged on the top of the sealed constant temperature test box diagonally opposite to the air inlet.

[0053] The present invention can eliminate the influence of external factors on the test results by controlling variables and standardizing sample strips, so that cigars from different batches or different sources can be compared under the same conditions; the burning time is an important indicator for measuring the burning speed and quality of cigars; the burning characteristics of cigars under normal conditions can be understood, providing basic data for oxygen index determination; determining the oxygen index of cigars is a key indicator for measuring their combustion performance and safety; the higher the oxygen index, the less likely the cigars are to burn, thereby improving their safety to a certain extent; in addition, the oxygen index can also be used to guide the production and formula adjustment of cigars to meet different market demands and safety standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A schematic diagram of the steps of an embodiment of a multifunctional detection method for the combustion performance of cigars according to the present invention;

[0055] Figure 2 A schematic flow chart of the steps of pre-treating a cigar tobacco leaf sample strip according to one embodiment of the multifunctional detection method for the combustion performance of cigar tobacco of the present invention;

[0056] Figure 3 A schematic flow chart of the steps of conducting a sample strip ignition point experiment according to an embodiment of the multifunctional detection method for the combustion performance of cigars of the present invention;

[0057] Figure 4 A schematic flow chart of the steps of calculating sample test data obtained by one embodiment of the multifunctional detection method for the combustion performance of cigars of the present invention;

[0058] Figure 5 A schematic flow chart of the steps of measuring the oxygen index of cigar tobacco leaves according to one embodiment of the multifunctional detection method for the combustion performance of cigar tobacco of the present invention;

[0059] Figure 6 It is a structural schematic diagram of an embodiment of a multifunctional detection device for cigar combustion performance of the present invention;

[0060] Figure 7 A schematic diagram of functional modules of an embodiment of a multifunctional detection system for cigar combustion performance of the present invention;

[0061] Figure 8 It is a structural schematic diagram of an embodiment of an electronic device of the present invention;

[0062] Fig. 9 It is a schematic structural diagram of an embodiment of the storage medium of the present invention. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] The terms "first", "second" and "third" in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0065] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0066] like Figure 1 As shown, this embodiment provides an embodiment of a multifunctional detection method for the combustion performance of cigars. In this embodiment, the multifunctional detection method for the combustion performance of cigars specifically includes the following steps:

[0067] Step S100: setting the temperature of the sealed constant temperature test box and the inlet oxygen content, cutting the cigar into sample strips of fixed length and width, pre-treating the cigar leaf sample strips, and fixing the pre-treated cigar sample strips on the clamp;

[0068] Step S200: The igniter ignites and heats the sample strip, and the infrared detector starts timing at the same time, and the experiment ends when the set combustion experiment time or the burning point of the sample strip is extinguished; the sample strip is taken out and the experimental data of the sample is calculated;

[0069] Step S300: measuring the oxygen index of the cigar tobacco leaves; if the sample fails to burn continuously, gradually increasing the oxygen concentration until the critical point at which the sample can burn continuously for 2 seconds is reached; if the sample burns continuously for more than 10 seconds or burns to the bottom of the sample, reducing the oxygen concentration until the critical point is found, and the critical point obtained is the oxygen index of the cigar tobacco leaves.

[0070] Preferably, in step S100 of this embodiment, the test environment is set, standardized cigar sample strips are prepared, and pre-processed and fixed, providing a unified and controllable starting condition for the combustion test; step S200 ignites the sample strips by an igniter and uses an infrared detector to time until the combustion ends; the combustion behavior of the cigar is directly observed, and data on the burning time is collected; step S300 finds the critical point at which the cigar can continue to burn for 2 seconds by adjusting the oxygen concentration, that is, the oxygen index; it directly reflects the combustion stability of the cigar under different oxygen concentrations.

[0071] In summary, this embodiment can eliminate the influence of external factors on the test results by controlling variables and standardizing sample strips, so that cigars from different batches or different sources can be compared under the same conditions; the burning time is an important indicator for measuring the burning speed and quality of cigars; the burning characteristics of cigars under normal conditions can be understood, providing basic data for oxygen index determination; determining the oxygen index of cigars is a key indicator for measuring their combustion performance and safety; the higher the oxygen index, the less likely the cigars are to burn, thereby improving their safety to a certain extent; in addition, the oxygen index can also be used to guide the production and formula adjustment of cigars to meet different market demands and safety standards.

[0072] Furthermore, if Figure 2 As shown, the process of pre-treating the cigar tobacco leaf sample strip in step S100 specifically includes the following steps:

[0073] Step S101: Set the temperature range of the sealed constant temperature test box to 10-50 degrees, preferably 20-40 degrees; set the inlet oxygen content to be constant for 10-30 minutes, the oxygen content range is 0-100%, preferably 15-30%; the oxygen pressure is 5-40kPa;

[0074] Step S102: cutting the cigar into sample strips of fixed length and width, with the number of sample strips for each test sample being no less than 6; the sample strips are cut in any one of the following directions: parallel to the leaf vein direction, perpendicular to the leaf vein direction, and at an angle of 45 degrees to the leaf vein direction;

[0075] Step S103: pre-treatment of the cigar tobacco leaf sample strip, the sample strip is balanced at a certain temperature and humidity for not less than 24 hours; the temperature is preferably 20-30°C, and the relative humidity is preferably 40-70%; the cigar tobacco leaf sample strip is fixed on the clamp and kept constant for 5-10 minutes to stabilize the temperature and oxygen content of the multifunctional detection device for the combustion performance of cigar tobacco.

[0076] Preferably, in step S101 of this embodiment, the temperature range of the sealed constant temperature test box is set to 10-50 degrees, ensuring that the test environment is under controllable temperature conditions, which helps to simulate the influence of different ambient temperatures on the combustion performance of cigars; the inlet oxygen content range is set to 0-100% and constant for 10-30 minutes, and the oxygen pressure is set to 5-40kPa, so that the test can simulate different oxygen concentrations and pressure conditions, thereby evaluating the combustion characteristics of cigars in different oxygen environments; step S102 cuts the cigars into sample strips of fixed length and width, ensuring that the sample strips of each test sample have consistent sizes, which helps The invention can reduce the test error caused by size difference; the number of sample strips for each test sample is not less than 6, which increases the reliability and statistical significance of the test; the selection of the cutting direction of the sample strip can evaluate the influence of different cutting directions on the combustion performance of cigar tobacco; step S103 the cigar tobacco leaf sample strip is balanced at a certain temperature and humidity for not less than 24 hours, which helps to eliminate the stress of the sample strip caused by the temperature and humidity difference, so as to ensure the accuracy of the test; the sample strip is fixed on the clamp and kept constant for 5-10 minutes, so that the temperature and oxygen content of the multifunctional detection device of the combustion performance of cigar tobacco are stable, which helps to reduce the interference factors in the test process.

[0077] In summary, this embodiment can ensure the accuracy and repeatability of the test results by precisely controlling the temperature, oxygen content and pressure of the test box; the preferred temperature and oxygen content ranges can be closer to the actual usage scenario, making the test results more practical; the consistency and comparability of the test are ensured by standardized sample strip preparation; the use of multiple sample strips improves the reliability and accuracy of the test; the evaluation of different cutting directions helps to deeply understand the impact of the structure of cigar on the combustion performance; the temperature and humidity balance of the sample strip ensures the consistency of the test conditions, thereby improving the accuracy of the test results; the stability of the device temperature and oxygen content helps to reduce test errors and improve the reliability of the test.

[0078] Furthermore, if Figure 3 As shown, the process of performing the sample strip ignition point test in step S200 specifically includes the following steps:

[0079] Step S201: start the ignition program, the igniter starts to heat up to the set ignition temperature, and controls the igniter to rise to contact the bottom of the sample strip. The ignition temperature of the ignition program is preferably set to 300-500°C, and the ignition time is 2-10s. After the set ignition time is reached, stop the ignition program, and the igniter descends and cools down;

[0080] Step S202: When the ignition program is detected to be started, the timing program is started at the same time, and the infrared detector starts timing until the set combustion test time or the burning point of the test sample is extinguished, the test is ended and the timing is stopped, and the sample test strip is taken out;

[0081] Step S203: Measure the burning length of the sample strip taken out, calculate the smoldering time and smoldering uniformity of the sample; calculate the burning rate and burning uniformity of the sample, and record the calculated sample test data.

[0082] Among them, the ignition program control formula of step S201 is:

[0083]

[0084] Where T(x, t) represents the temperature distribution of the igniter at position x and time t (°C); K represents the thermal diffusion coefficient (m 2 / s), which is related to the thermal conductivity of the igniter material; η is the heating fluctuation amplitude (℃ / s), which describes the periodic fluctuation in the heating process; ω is the heating fluctuation frequency (rad / s); λ is the spatial attenuation coefficient (1 / m), which describes the attenuation of heat with distance; σ is the random fluctuation intensity (℃ / s); W(t) represents the standard Wiener Process, which is used to describe the random noise in the heating process.

[0085] The control formula of the igniter rising height h(t):

[0086]

[0087] Where h(t) is the height of the igniter at time t (mm); h0 is the initial height of the igniter (mm); γ is the saturation value of the rising height (mm); τ is the time constant (s), which controls the rising speed; ζ is the error function amplitude (mm); erf(·) is the Gaussian error function; t c represents the central time point (s); σ t represents the time standard deviation (s);

[0088] Step S202 Combustion experiment timing and detection formula:

[0089]

[0090] In the formula, Δt represents the effective combustion time (s); represents the wavelet transform of the infrared detection signal I(t), a is the scale parameter, b is the translation parameter; I(t) represents the detection signal intensity of the infrared detector at time t (dimensionless); t1 represents the start time of the ignition program (s); t2 represents the end time of the combustion experiment (s);

[0091] The calculation formula of combustion uniformity U is:

[0092]

[0093] Wherein, U represents the combustion uniformity (dimensionless); L represents the total combustion length of the sample strip (mm); (x) represents the infrared detection signal intensity at position x (dimensionless); represents the second-order derivative of the infrared detection signal intensity; β represents the weight coefficient (dimensionless); D f It represents the fractal dimension, which describes the complexity of the combustion path. ACF(I(x), Δx) represents the spatial autocorrelation function, which describes the spatial correlation of the signal.

[0094] The calculation formula of burning rate V is:

[0095]

[0096] Where V represents the burning rate (mm / s); Δ represents the effective burning time (s); E a represents the combustion activation energy (J / mol); R represents the universal gas constant (8.314 J / (mol·K)); T avg represents the average temperature during combustion (K); χ represents the nonlinear correction coefficient; Li2(·) represents the second-order polylogarithmic function; T max Indicates the highest temperature during the combustion process (K); T min Indicates the lowest temperature during the combustion process (K).

[0097] Preferably, in step S201 of this embodiment, the igniter starts heating and quickly heats up to the set ignition temperature. This temperature range is to ensure that the sample strip can be reliably ignited; the igniter contacts the bottom end of the sample strip and performs an ignition operation for 2-10 seconds. This time period is to ensure that the sample strip can burn stably and avoid that heating for too long may have an adverse effect on the experimental results; after the set ignition time is reached, the igniter stops heating and cools down to avoid continued heating by the igniter interfering with the subsequent combustion process; in step S202, the infrared detector starts timing synchronously when the ignition program is started, which can Accurately record the time from the start of ignition to the end of the combustion experiment; the timing continues until the set combustion experiment time or the combustion point of the experimental sample is extinguished, which can ensure the integrity of the experimental data; after the experiment, the timing program stops and the sample experimental strip is taken out for measurement and analysis; step S203 measures the combustion length of the sample strip taken out, calculates the sample smoldering time and smoldering uniformity, which helps to understand the stability of the sample strip during the combustion process; calculates the burning rate and combustion uniformity of the sample, which can reflect the combustion performance of the material and its safety in practical applications; the calculated sample test data is recorded for analysis and comparison.

[0098] In summary, this embodiment ensures the consistency of the initial conditions of the experiment and improves the accuracy and repeatability of the experimental results by precisely controlling the ignition temperature and ignition time; the raising and lowering and cooling operations of the igniter help to control the boundary conditions of the experiment, making the combustion process more stable and controllable; through precise timing, the combustion performance of the sample strip can be accurately evaluated, including key indicators such as combustion rate and combustion time; the use of infrared detectors can improve the accuracy and reliability of timing and reduce the impact of human errors on experimental results; through measurement and calculation, comprehensive data on the combustion performance of the sample strip can be obtained, providing an important basis for the safety assessment and application of materials; data recording helps in data analysis and verification of experimental results, and improves the reliability and scientificity of the experiment.

[0099] Furthermore, if Figure 4 As shown, the process of calculating the sample test data in step S203 specifically includes the following steps:

[0100] Step S2031: Measure the sample strip taken out, and record its burning length as L; calculate the sample smoldering time and smoldering uniformity, and the calculation process is as follows:

[0101]

[0102]

[0103] Where τ is the smoldering time of the sample, s t is the smoldering uniformity, t iis the smoldering time of the i-th sample strip of the sample, n is the total number of test samples of the sample, and the smoldering time is the time from the cigar tobacco leaf being ignited to the burning point being naturally extinguished.

[0104] Step S2032: Calculate the combustion rate and combustion uniformity of the sample. The calculation process is as follows:

[0105]

[0106]

[0107] Where V is the burning rate of the sample, s v is the combustion uniformity, L i is the burning time T of the i-th specimen of the sample i The burning length under n is the total number of test specimens of the sample tested.

[0108] Step S2033: Establish a mapping relationship table between sample combustion length and sample smoldering time, smoldering uniformity, combustion rate and combustion uniformity, and record the calculated sample test data.

[0109] Preferably, in step S2031 of this embodiment, the performance of the sample in the combustion process can be intuitively understood by measuring the burning length of the sample strip taken out; the average smoldering time of the sample is obtained by averaging the smoldering time of multiple sample strips, which reflects the average length of time for the sample to naturally extinguish after ignition to the ignition point; the uniformity of the smoldering time is calculated by the standard deviation formula, which reflects the discrete degree of the smoldering time between different sample strips, that is, the stability of the smoldering process; step S2032 obtains the average burning rate of the sample by averaging the ratio of the burning length to the burning time of multiple sample strips, which reflects the linear length of the sample burning per unit time; the uniformity of the burning rate is calculated by the standard deviation formula, which reflects the discrete degree of the burning rate between different sample strips, that is, the stability of the combustion process; step S2033 integrates the information of the sample such as the burning length, smoldering time, smoldering uniformity, burning rate and combustion uniformity to form a mapping relationship table for data analysis and processing; the calculated sample test data is recorded to provide a basis for data analysis and performance evaluation.

[0110] In summary, this embodiment calculates the smoldering characteristics of the sample, including the average smoldering time and the stability of the smoldering process, to provide a basis for combustion performance analysis and improvement; it is of great significance for evaluating the combustion performance of the sample and predicting its performance in actual use; by establishing a mapping relationship table and recording data, the combustion performance data of the sample can be systematically managed and analyzed, providing data support for product improvement and optimization; at the same time, these data can also be used for performance comparison and evaluation between different samples.

[0111] Furthermore, if Figure 5 As shown, the process of measuring the oxygen index of cigar tobacco leaves in step S300 specifically includes the following steps:

[0112] Step S301: setting the temperature of the sealed constant temperature test box and the inlet oxygen content, cutting the cigar into sample strips of fixed length and width, pre-treating the cigar leaf sample strips, and fixing the pre-treated cigar sample strips on a holder;

[0113] Step S302: The igniter ignites and heats the sample strip, and the infrared detector starts timing at the same time, setting the ignition temperature to 500°C and the ignition time to 5s;

[0114] Step S303: If the sample fails to continue to burn, the cigar tobacco leaf sample strip is pretreated again, the total air pressure is maintained at 101.3 kPa, and the oxygen concentration is gradually increased by 0.1% each time until the critical point at which the sample can continue to burn for 2 seconds is reached; if the sample continues to burn for more than 10 seconds or burns to the bottom of the sample, the oxygen concentration is reduced by 0.5% each time until the critical point is found; the critical point obtained is the cigar tobacco leaf oxygen index.

[0115] Preferably, in step S301 of this embodiment, the temperature and oxygen content of the sealed constant temperature test box are set to ensure the consistency of the test environment and reduce the influence of external factors on the test results; the cigars are cut into fixed lengths and widths to ensure that all test samples have the same physical dimensions and improve the accuracy and comparability of the test; the cigar leaf sample strips are pretreated, which may include steps such as drying and balancing humidity to eliminate initial differences between samples; the pretreated cigar leaf sample strips are fixed on the clamp to ensure that the position of the sample is stable during the test to facilitate observation and measurement; step S302 uses an igniter to heat the sample strip to a set ignition temperature and time to trigger the combustion process; the infrared detector starts timing to accurately measure the burning time of the sample; step S303 adjusts the oxygen concentration according to the combustion condition of the sample until a critical point is found at which the sample can continue to burn for 2 seconds; and the oxygen index of the cigar leaf is accurately determined by gradually increasing or decreasing the oxygen concentration.

[0116] In summary, this embodiment provides a standardized and repeatable test environment for combustion testing; ensures the accuracy and reliability of test results, and facilitates comparison between different samples; standardizes ignition conditions to ensure that the ignition process of each test is consistent; through precise timing, provides data support for judging the combustion performance of samples; oxygen index is an important indicator for measuring the combustion performance of materials, reflecting the flame retardancy of materials in air; by accurately measuring the oxygen index, the combustion performance of cigar tobacco leaves can be evaluated, providing an important basis for product quality control and research and development.

[0117] This embodiment also provides an embodiment of a multifunctional detection experiment of cigar burning performance. In this embodiment, the multifunctional detection experiment of cigar burning performance is applied to the multifunctional detection method of cigar burning performance in the above embodiment. The multifunctional detection experiment of cigar burning performance includes:

[0118] The same cigar tobacco leaf sample was tested for combustibility in an open environment in Kunming and Zhengzhou. The specific experimental method is as follows: 6 sample strips with a width of 10 mm and a height of 80 mm were cut parallel to the veins of the cigar tobacco leaf, and the sample strips were taken out after balancing at 20°C and 65% relative humidity for 24 hours to measure the combustibility performance; the temperature of the sealed constant temperature test box was set to 20°C, the air inlet and outlet were open to the atmosphere, the sample strips were fixed on the clamp, kept constant for 10 minutes, the igniter was heated to 500°C, the igniter was raised to contact the sample strips, ignited for 2S, and measured, and the smoldering time is shown in Table 1.

[0119] In order to verify the method of the present invention, the flammability of the above cigar tobacco leaf samples was tested in Kunming using the present invention. The method of cutting and pre-treating the tobacco leaf sample strips is consistent with the above method. The temperature of the sealed constant temperature test box is set to 20°C, the oxygen content is set to 21.3%, and the oxygen pressure is set to 20.9Kpa. After being constant for 10 minutes, the subsequent test steps are consistent with the above steps. The measured smoldering time is shown in Table 1.

[0120] As shown in Table 1, the smoldering time of the same sample in Kunming and Zhengzhou is significantly different and not comparable. However, after the oxygen content of cigar tobacco leaves was controlled by the method in Kunming, the test results of the same sample in Kunming and Zhengzhou were basically consistent. This shows that the present invention can effectively reduce the influence of altitude on the combustion performance of cigar tobacco leaves, and can simulate the combustion performance of tobacco leaves at different altitudes.

[0121] Table 1 Cigar tobacco smoldering time data

[0122]

[0123] Preferably, in this embodiment, the cigar tobacco leaves are cut into sample strips with a width of 10 mm and a height of 80 mm in parallel along the veins to ensure that all the sample strips have the same physical size, thereby improving the accuracy and comparability of the test results; the samples are balanced at 20°C and 65% relative humidity for 24 hours to eliminate the influence of humidity on the combustion performance and ensure the consistency of the test conditions; the combustion performance of the same cigar tobacco leaf sample is tested in an open environment in Kunming and Zhengzhou respectively, and the smoldering time is recorded; the temperature of the sealed constant temperature test box is set to 20°C, but the air inlet and outlet are open to the atmosphere to simulate the combustion conditions in the actual environment ; The combustion performance of cigar tobacco leaves was tested in Kunming using the method of the present invention, and the combustion environment under different altitude conditions was simulated by controlling the oxygen content (set to 21.3%) and the oxygen pressure (set to 20.9Kpa); after 10 minutes of constant temperature, ignition and combustion performance tests were performed according to the established steps, and the smoldering time was recorded; the smoldering time data obtained in the open environment of Kunming and Zhengzhou and in Kunming using the method of the present invention were statistically analyzed; the average smoldering time (τ) and the smoldering time uniformity (s_t) were calculated to evaluate the stability and consistency of the combustion performance under different test conditions.

[0124] In summary, this embodiment standardizes the size of the sample strips and the processing conditions before the test, providing a stable and repeatable benchmark for subsequent combustion performance tests; evaluates the difference in combustion performance of the same sample under different geographical environments, and reveals the influence of environmental factors such as altitude on combustion performance; verifies the effectiveness of the method of the present invention, that is, reducing the influence of altitude on combustion performance by controlling oxygen content and pressure; makes the combustion performance data obtained under different altitude conditions comparable, and provides strong support for the quality control and research and development of cigar products; through data analysis, intuitively displays the difference in combustion performance of the same sample under different test conditions; verifies that the method of the present invention can significantly reduce the influence of altitude on combustion performance and improve the accuracy and comparability of test results.

[0125] This embodiment also provides an embodiment of a multifunctional detection experiment of cigar burning performance. In this embodiment, the multifunctional detection experiment of cigar burning performance is applied to the multifunctional detection method of cigar burning performance in the above embodiment. The multifunctional detection experiment of cigar burning performance includes:

[0126] In order to study the combustion performance of cigar tobacco leaves from origins A and B, 10 sample strips with a width of 20 mm and a height of 100 mm were cut from the cigar tobacco leaves along the vertical direction of the veins. The strips were taken out after equilibration for 24 hours at 22°C and a relative humidity of 50%, and the flammability performance was measured. The temperature of the sealed constant temperature test box was set at 25°C, the oxygen content was set at 20.9%, and the oxygen partial pressure was 21KPa. After being kept constant for 10 minutes, the sample strips were fixed on the clamp and kept constant for 10 minutes. The igniter was heated to 300°C, and the igniter was raised to contact the sample strips, ignited for 5S, and burned for 1 minute. Then, the burning length was measured. The burning rate is shown in Table 2.

[0127] It can be seen from the table that the burning rate of cigar tobacco leaves from origin A is lower than that from origin B, and the uniformity of its burning rate is also worse than that of tobacco leaves from origin B.

[0128] Table 2 Burning rate of cigar tobacco leaves

[0129]

[0130]

[0131] Preferably, in this embodiment, the cigar tobacco leaves are cut into sample strips with a width of 20 mm and a height of 100 mm along the vertical direction of the leaf veins to ensure that all sample strips have uniform size, which is to eliminate the changes in combustion performance caused by size differences and make the test results more comparable; the sample strips are balanced at 22°C and 50% relative humidity for 24 hours, which is to ensure that the humidity state of the sample strips before the test is consistent and avoid the influence of humidity on the combustion performance; the temperature of the sealed constant temperature test box is set to 25°C, the oxygen content is set to 20.9%, and the oxygen partial pressure is 21Kpa. These parameters are set to simulate a specific combustion environment and ensure the consistency of the test conditions; the igniter is heated to 300°C, the sample strips are ignited for 5 seconds, and then burned for 1 minute. This step is to observe and record the burning rate of the cigar tobacco leaves; after burning, the sample strips are taken out, the burning length is measured, and the burning rate is calculated. By statistically analyzing the average burning rate (V) and the uniformity of the burning rate (s_v), the differences in the burning performance of cigar tobacco leaves from different origins can be quantified.

[0132] In summary, this embodiment provides a stable and reliable test basis for the test of combustion performance through standardized sample strip preparation; through balance treatment, the interference of humidity as a variable on the test results is eliminated, thereby improving the accuracy and reliability of the test; by controlling the environmental conditions in the test box, the combustion performance of cigar tobacco leaves from different origins under the same conditions can be studied, so as to more accurately compare their differences; through ignition and combustion tests, the combustion performance data of cigar tobacco leaves can be intuitively obtained, providing a basis for analysis and comparison; through the measurement and analysis of the burning rate, the difference in combustion performance between cigar tobacco leaves from origins A and B can be clearly seen, providing strong data support for quality control, product development and market positioning.

[0133] This embodiment also provides an embodiment of a multifunctional detection experiment of cigar burning performance. In this embodiment, the multifunctional detection experiment of cigar burning performance is applied to the multifunctional detection method of cigar burning performance in the above embodiment. The multifunctional detection experiment of cigar burning performance includes:

[0134] For two tobacco leaf samples, C and D cigar tobacco leaves, which are difficult to ignite under normal conditions, 40 sample strips with a width of 10 mm and a height of 80 mm were cut from the cigar tobacco leaves along the veins at a 45° direction, and taken out after balancing at 20°C and a relative humidity of 65% for 24 hours to measure the flammability performance; the temperature of the sealed constant temperature test box was set at 20°C, the total air pressure was 101.3, and the oxygen content was set at 20.9%. After being kept constant for 10 minutes, the sample strips were fixed on the clamp and kept constant for 10 minutes. The igniter was heated to 500°C, and the igniter was raised to contact the sample strips, and ignited for 5S, and the oxygen concentration was gradually increased by 0.1% each time until the oxygen content reached 23.6% (C) and 22.5% (D), respectively, and the sample could continue to burn for 2s. That is, the oxygen index of tobacco leaf A is 23.6% and the oxygen index of tobacco leaf B is 22.5%.

[0135] Preferably, in this embodiment, the cigar tobacco leaves are cut into sample strips with a width of 10 mm and a height of 80 mm along the veins at a 45° angle. This step ensures that all sample strips have consistent physical size and shape, thereby reducing the impact of sample strip size differences on the combustion performance test results; the sample strips are balanced at 20°C and 65% relative humidity for 24 hours. This step is intended to eliminate the impact of humidity on the combustion performance of cigar tobacco leaves and ensure that all sample strips have consistent humidity conditions before the test; the temperature of the sealed constant temperature test box is set to 20°C, the total air pressure is 101.3 kPa, and the oxygen content is set to 20.9%, which is kept constant for 10 minutes. This step simulates specific environmental conditions and provides a stable test environment for subsequent combustion performance tests; the sample strips are fixed on the holder and kept constant for 10 minutes. This step ensures the stable state of the sample strips before the test and reduces the impact of changes in the position or state of the sample strips on the test results; the igniter is heated to 500°C, the sample strips are ignited for 5 seconds, and then the oxygen concentration is gradually increased until the sample can burn for 2 seconds. This step aims to determine the minimum oxygen index of cigar tobacco leaves (i.e. the minimum oxygen concentration that can sustain combustion); the oxygen index of cigar tobacco leaves C and D was determined to be 23.6% and 22.5%. This step is a summary and quantification of the previous test results, providing a basis for subsequent analysis and comparison.

[0136] In summary, this embodiment improves the accuracy and comparability of the test, making the combustion performance test results between different sample strips more convincing; improves the reliability of the test results, making the test results more truly reflect the combustion performance of cigar tobacco leaves; by controlling the test environment, the combustion performance of cigar tobacco leaves under different oxygen concentrations can be studied, providing a basis for understanding its combustion mechanism; improves the stability of the test, making the test results more accurate and reliable; by determining the oxygen index, the combustion performance of different cigar tobacco leaves can be more intuitively compared, providing strong data support for quality control, product development and market positioning.

[0137] like Figure 6 As shown, this embodiment also provides an embodiment of a multifunctional detection device for cigar combustion performance. In this embodiment, the multifunctional detection device for cigar combustion performance is applied to the multifunctional detection method for cigar combustion performance in the above embodiment. The multifunctional detection device for cigar combustion performance comprises: a sealed constant temperature test box 1, an infrared detector 2, a blade holder 3, a sample strip 4, an igniter 5, an air inlet 6 and an air outlet 7;

[0138] Among them, an infrared detector 2 is arranged on one side of the sealed constant temperature test box 1, a blade holder 3 is arranged on the top of the sealed constant temperature test box 1 along the detection direction of the infrared detector 2, an igniter 5 is arranged at the corresponding bottom of the blade holder 3, and a sample strip 4 is arranged between the blade holder 3 and the igniter 5; an air inlet 6 is arranged at the bottom edge of the sealed constant temperature test box 1 in a direction parallel to the igniter 5, and an air outlet 7 is arranged at the top of the sealed constant temperature test box 1 diagonally opposite to the air inlet 6.

[0139] Preferably, the sealed constant temperature test box 1 of this embodiment has a constant temperature range of 10-50 degrees; the infrared detector 2 can simultaneously record the combustion start and end time of multiple tobacco leaves, with a timing accuracy of 0.01s; the clamp 3 can simultaneously hold multiple cigar tobacco leaves; the height of the leaf clamp 3 can be adjusted according to the length of the leaf; the sample strip 4 is a cigar tobacco leaf of fixed size; the igniter 5 is an electric soldering iron that can heat the temperature to 300-1000 degrees and can be kept constant at the set temperature; the igniter 5 can be raised and lowered; the igniter 5 can realize the simultaneous ignition of multiple tobacco leaves, and accurately control the burning of the leaves. The combustion starts at the same time; the air entering through the air inlet 6 is precisely transported by a binary air pump; there is an oxygen concentration adjustment function, and the oxygen concentration can be adjusted by the binary air pump, the oxygen concentration adjustment range is 0-100%, and the oxygen pressure adjustment range is 5-40kpa; each air inlet has a glass fiber filter to buffer the incoming air and keep the inflowing air uniform and stable; each air outlet 7 has a glass fiber filter to buffer the outflowing air and keep the inflowing air uniform and stable; the air pipe connected to the air outlet 7 adopts a liquid seal to ensure the air pressure of the sealed constant temperature test box 1 and prevent air from entering the sealed constant temperature test box 1.

[0140] In summary, the present embodiment integrates a sealed constant temperature test box 1, an infrared detector 2, a leaf holder 3, an igniter 5, an air inlet 6, an air outlet 7 and other components, which can realize a comprehensive detection of the combustion performance of cigars; by simultaneously recording the combustion start and end time of multiple tobacco leaves, and realizing the simultaneous ignition of multiple tobacco leaves, the detection efficiency is greatly improved; the infrared detector 2 in the device has a high-precision timing function (0.01s), which can accurately record the combustion time; the igniter 5 can be heated to a specified temperature (300-1000 degrees) and kept constant, and can lift and accurately control the start of leaf combustion, ensuring the accuracy and controllability of the experiment; the sealed constant temperature test box 1 provides a stable temperature environment (10-50 degrees), which is crucial for studying the influence of temperature on the combustion performance of cigars; By precisely delivering air and adjusting the oxygen concentration (0-100%) through the binary air pump, the influence of oxygen concentration on combustion performance can be studied, further enhancing the controllability of the experiment and the accuracy of the results; both the air inlet 6 and the air outlet 7 are provided with glass fiber filters, which can buffer the air flow and keep the inflow and outflow of air uniform and stable; it helps to reduce interference factors during the experiment and improve the reliability of the data; the air pipe connected to the air outlet 7 adopts a liquid seal, which can ensure the stability of the air pressure in the sealed constant temperature test box and prevent external air from entering, thereby ensuring the closedness and stability of the experimental environment; the height of the leaf clamp 3 can be adjusted according to the length of the leaf, and multiple cigar tobacco leaves can be held at the same time, which increases the adaptability and flexibility of the device, making it suitable for the detection of cigar tobacco leaves of different specifications and quantities.

[0141] like Figure 7 As shown, this embodiment also provides an embodiment of a multifunctional detection system for cigar burning performance. In this embodiment, the multifunctional detection system for cigar burning performance is applied to the multifunctional detection method for cigar burning performance in the above embodiment. The multifunctional detection system for cigar burning performance includes:

[0142] The tobacco leaf initialization module 8 is used to set the temperature of the sealed constant temperature test box and the inlet oxygen content, cut the cigar into sample strips of fixed length and width, pre-treat the cigar leaf sample strips, and fix the pre-treated cigar leaf sample strips on the clamp;

[0143] The timing calculation module 9 is used for the igniter to ignite and heat the sample strip, and the infrared detector starts timing at the same time, and ends the experiment when the set combustion experiment time or the burning point of the sample strip is extinguished; the sample strip is taken out and the experimental data of the sample is calculated;

[0144] The critical point calculation module 10 is used to measure the oxygen index of the cigar tobacco leaves; if the sample fails to burn continuously, the oxygen concentration is gradually increased until the critical point at which the sample can burn continuously for 2 seconds is reached; if the sample burns continuously for more than 10 seconds or burns to the bottom of the sample, the oxygen concentration is reduced until the critical point is found, and the critical point obtained is the oxygen index of the cigar tobacco leaves.

[0145] Preferably, the tobacco leaf initialization module 8 of this embodiment sets the test environment, prepares standardized cigar sample strips, and performs pretreatment and fixation, thereby providing a unified and controllable starting condition for the combustion test; the timing calculation module 9 ignites the sample strips through an igniter and uses an infrared detector to time until the combustion ends; directly observes the combustion behavior of the cigar and collects data on the burning time; the critical point calculation module 10 finds the critical point, i.e., the oxygen index, at which the cigar can continue to burn for 2 seconds by adjusting the oxygen concentration; and directly reflects the combustion stability of the cigar under different oxygen concentrations.

[0146] In summary, this embodiment can eliminate the influence of external factors on the test results by controlling variables and standardizing sample strips, so that cigars from different batches or different sources can be compared under the same conditions; the burning time is an important indicator for measuring the burning speed and quality of cigars; the burning characteristics of cigars under normal conditions can be understood, providing basic data for oxygen index determination; determining the oxygen index of cigars is a key indicator for measuring their combustion performance and safety; the higher the oxygen index, the less likely the cigars are to burn, thereby improving their safety to a certain extent; in addition, the oxygen index can also be used to guide the production and formula adjustment of cigars to meet different market demands and safety standards.

[0147] like Figure 8 As shown, this embodiment provides an embodiment of an electronic device. In this embodiment, the electronic device 11 includes a processor 111 and a memory 112 coupled to the processor 111 .

[0148] The memory 112 stores program instructions for implementing the multifunctional detection method of the burning performance of cigar in any of the above embodiments.

[0149] The processor 111 is used to execute the program instructions stored in the memory 112 to perform a multifunctional detection method of the burning performance of a cigar.

[0150] The processor 111 may also be referred to as a CPU (Central Processing Unit). The processor 111 may be an integrated circuit chip having the ability to process signals. The processor 111 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0151] Further, Fig. 9 The schematic diagram of the structure of the storage medium of an embodiment of the present application is that the storage medium 12 of the embodiment of the present application stores program instructions 121 capable of implementing all the above methods, wherein the program instructions 121 can be stored in the above storage medium in the form of a software product, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or terminal devices such as a computer, a server, a mobile phone, and a tablet.

[0152] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0153] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional units. The above is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, is also included in the patent protection scope of the present invention.

[0154] The specific implementation methods of the invention are described in detail above, but they are only examples, and the invention is not limited to the specific implementation methods described above. For those skilled in the art, any equivalent modification or substitution of the invention is also within the scope of the invention, therefore, the equalization, modification, improvement, etc. made without departing from the spirit and principle of the invention should be included in the scope of the invention.

Claims

1. A multifunctional detection method for the combustion performance of cigars, characterized in that: The multifunctional detection method for the combustion performance of cigars comprises: Setting the temperature of the sealed constant temperature test box and the inlet oxygen content, cutting the cigar into sample strips of fixed length and width, pre-treating the cigar leaf sample strips, and fixing the pre-treated cigar sample strips on the clamp; The igniter ignites and heats the sample strip, and the infrared detector starts timing at the same time, and the experiment ends when the set combustion test time or the burning point of the sample strip is extinguished; the sample strip is taken out and the experimental data of the sample is calculated; The oxygen index of cigar tobacco leaves is measured; if the sample fails to burn continuously, the oxygen concentration is gradually increased until the critical point at which the sample can continue to burn for 2 seconds; if the sample continues to burn for more than 10 seconds or burns to the bottom of the sample, the oxygen concentration is reduced until the critical point is found. The critical point obtained is the oxygen index of cigar tobacco leaves.

2. The multifunctional detection method for the combustion performance of cigar according to claim 1, characterized in that: The process of pre-treating the cigar tobacco leaf sample strips comprises the following steps: Set the temperature range of the sealed constant temperature test box to 10-50 degrees; set the inlet oxygen content; Cut the cigar into sample strips of fixed length and width, with the number of sample strips for each test sample being no less than 6; the sample strips are cut in one of the following directions: parallel to the leaf vein direction, perpendicular to the leaf vein direction, or at an angle of 45 degrees to the leaf vein direction; The pretreatment of the cigar tobacco leaf sample strip is to balance the sample strip under temperature and humidity for no less than 24 hours; the temperature is 20-30°C and the relative humidity is 40-70%; the cigar tobacco leaf sample strip is fixed on the clamp and kept constant for 5-10 minutes to stabilize the temperature and oxygen content of the multifunctional detection device for the combustion performance of cigar tobacco.

3. The multifunctional detection method for the combustion performance of cigar according to claim 2, characterized in that: Set the inlet oxygen content, keep it constant for 10-30 minutes, the oxygen content range is 0-100%; oxygen pressure is 5-40kPa.

4. The multifunctional detection method for the combustion performance of cigar according to claim 1, characterized in that: The process of conducting the sample strip ignition point test includes the following steps: Start the ignition program, the igniter starts to heat up to the set ignition temperature, and control the igniter to rise to contact with the bottom of the sample strip. Set the ignition temperature of the ignition program to 300-500℃, and the ignition time to 2-10s. After reaching the set ignition time, stop the ignition program, and the igniter descends and cools down; When the ignition program is detected to be started, the timing program is started at the same time, and the infrared detector starts timing until the set combustion test time or the burning point of the test sample is extinguished, the test is ended and the timing is stopped, and the sample test strip is taken out; Measure the burning length of the sample strip taken out, calculate the sample smoldering time and smoldering uniformity; calculate the burning rate and burning uniformity of the sample, and record the calculated sample test data.

5. The multifunctional detection method for the combustion performance of cigar according to claim 4, characterized in that: Ignition program control formula: Where T(x,t) represents the temperature distribution of the igniter at position x and time t; k represents the thermal diffusion coefficient, which is related to the thermal conductivity of the igniter material; η represents the heating fluctuation amplitude, which describes the periodic fluctuations in the heating process; ω represents the heating fluctuation frequency; λ represents the spatial attenuation coefficient, which describes the attenuation of heat with distance; σ represents the random fluctuation intensity; W(t) represents the standard Wiener process, which is used to describe the random noise in the heating process; The control formula of the igniter rising height h(t): Where h(t) represents the height of the igniter at time t; h0 represents the initial height of the igniter; γ represents the saturation value of the rising height; τ represents the time constant, which controls the rising speed; ζ represents the error function amplitude; erf(·) represents the Gaussian error function; t c represents the central time point; σ t Represents the time standard deviation.

6. The multifunctional detection method for the combustion performance of cigar according to claim 4, characterized in that: Combustion experiment timing and detection formula: Where Δt represents the effective combustion time; W{I(t)}(a,b) represents the wavelet transform of the infrared detection signal I(t), a is the scale parameter, and b is the translation parameter; I(t) represents the detection signal intensity of the infrared detector at time t; t1 represents the start time of the ignition program; t2 represents the end time of the combustion experiment; The calculation formula of combustion uniformity U is: Wherein, U represents the combustion uniformity; L represents the total combustion length of the sample strip; (x) represents the infrared detection signal intensity at position x; represents the second-order derivative of the infrared detection signal intensity; β represents the weight coefficient; D f represents the fractal dimension, which describes the complexity of the combustion path; ACF(I(x),Δx) represents the spatial autocorrelation function, which describes the correlation of the signal in space; The calculation formula of burning rate V is: In the formula, V represents the burning rate; Δ represents the effective burning time; E a represents the combustion activation energy; R represents the universal gas constant; T avg represents the average temperature during the combustion process; χ represents the nonlinear correction coefficient; Li2(·) represents the second-order polylogarithmic function; T max Indicates the highest temperature during the combustion process; T min Indicates the lowest temperature during the combustion process.

7. The multifunctional detection method for the combustion performance of cigar according to claim 4, characterized in that: The process of calculating the sample test data includes the following steps: Measure the sample strip taken out and record its burning length as L; calculate the sample smoldering time and smoldering uniformity; Calculate the burning rate and combustion uniformity of the sample; Establish a mapping relationship table between sample combustion length and sample smoldering time, smoldering uniformity, combustion rate and combustion uniformity, and record the calculated sample test data.

8. The multifunctional detection method for the combustion performance of cigar according to claim 1, characterized in that: The process of measuring the oxygen index of cigar tobacco leaves includes the following steps: Setting the temperature of the sealed constant temperature test box and the inlet oxygen content, cutting the cigar into sample strips of fixed length and width, pre-treating the cigar leaf sample strips, and fixing the pre-treated cigar sample strips on the clamp; The igniter ignites and heats the sample strip, and the infrared detector starts timing at the same time, setting the ignition temperature to 500°C and the ignition time to 5s; If the sample fails to continue burning, the cigar tobacco leaf sample strips are pretreated again, the total air pressure is maintained at 101.3 kPa, and the oxygen concentration is gradually increased by 0.1% each time until the critical point at which the sample can continue to burn for 2 seconds; if the sample continues to burn for more than 10 seconds or burns to the bottom of the sample, the oxygen concentration is reduced by 0.5% each time until the critical point is found; the critical point obtained is the cigar tobacco leaf oxygen index.

9. A multifunctional detection system for the combustion performance of cigars, which is applied to the multifunctional detection method for the combustion performance of cigars as claimed in any one of claims 1 to 8, characterized in that: The multifunctional detection system for the combustion performance of cigars comprises: The tobacco leaf initialization module is used to set the temperature of the sealed constant temperature test box and the inlet oxygen content, cut the cigar into sample strips of fixed length and width, pre-treat the cigar leaf sample strips, and fix the pre-treated cigar leaf sample strips on the clamp; The timing calculation module is used for the igniter to ignite and heat the sample strip, and the infrared detector starts timing at the same time, and ends the experiment when the set combustion test time or the burning point of the sample strip is extinguished; the sample strip is taken out and the experimental data of the sample is calculated; The critical point calculation module is used to measure the oxygen index of cigar tobacco leaves. If the sample fails to burn continuously, the oxygen concentration is gradually increased until the critical point at which the sample can continue to burn for 2 seconds. If the sample continues to burn for more than 10 seconds or burns to the bottom of the sample, the oxygen concentration is reduced until the critical point is found. The critical point obtained is the oxygen index of the cigar tobacco leaves.

10. A multifunctional detection device for the combustion performance of cigars, applied to the multifunctional detection method for the combustion performance of cigars as claimed in any one of claims 1 to 7, characterized in that: The multifunctional detection device for the combustion performance of cigars comprises: a sealed constant temperature test box, an infrared detector, a leaf holder, a sample strip, an igniter, an air inlet and an air outlet; Among them, an infrared detector is arranged on one side of the sealed constant temperature test box, a blade holder is arranged on the top of the sealed constant temperature test box along the detection direction of the infrared detector, an igniter is arranged at the corresponding bottom of the blade holder, and a sample strip is arranged between the blade holder and the igniter; an air inlet is arranged at the bottom edge of the sealed constant temperature test box in a direction parallel to the igniter, and an air outlet is arranged on the top of the sealed constant temperature test box diagonally opposite to the air inlet.

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