Cigarette burning and smoking uniformity evaluation method and system

Abstract

The invention provides a cigarette burning and smoking uniformity evaluation method and system. The method comprises the following steps: S1, selecting a preset number of cigarettes from a cigarette sample as to-be-detected cigarettes; s2, carrying out cigarette smoking under a fixed smoking condition; s3, recording the instantaneous pressure drop in the airflow channel during each suction, and determining the suction resistance of the current suction according to the instantaneous pressure drop; s4, recording the instantaneous pressure drop in the airflow channel during each suction, and determining the suction resistance of the current suction according to the instantaneous pressure drop; and S5, calculating and outputting a combustion and suction uniformity evaluation index according to the puff-by-puff movement change rate. According to the method, the uniformity and the stability of the cigarette burning and smoking process are determined according to the burning and smoking uniformity evaluation index. According to the cigarette smoking uniformity evaluation method and system provided by the invention, smoking evaluation personnel do not need to carry out smoking evaluation, and the smoking uniformity evaluation of the cigarettes in batches can be carried out, so that the manpower and time are greatly saved. The burning and smoking uniformity of different cigarettes can be visually represented, and an important reference is provided for cigarette design and quality evaluation.

Description

Technical Field

[0001] This application relates to the technical field of cigarette quality detection, and more specifically, to a method and system for evaluating the burning uniformity of cigarettes. Background Art

[0002] The cigarette burning process is a complex dynamic process. During the successive puffs after the cigarette is lit, the state of the smoke changes as the combustion progresses, and the sensory experience of each puff by the consumer is different. If the differences in successive puffs fluctuate greatly and the burning is uneven, it will have a negative impact on the sensory experience of smokers. Therefore, the burning uniformity of cigarettes during the burning process is very important.

[0003] Currently, the evaluation of the sensory experience such as the burning uniformity of cigarettes is mainly obtained by sensory evaluation of cigarettes by evaluators, which is time-consuming and laborious, and can only evaluate the overall sensory experience of cigarette puffing. There is no simple and intuitive way to characterize the uniformity of successive puffs of a cigarette during the entire burning process.

[0004] In summary, there is a need to provide an improved technical solution to address the above deficiencies in the prior art. Summary of the Invention

[0005] The purpose of the embodiments of this application is to provide a method and system for evaluating the burning uniformity of cigarettes, which can evaluate the burning uniformity of different cigarettes by analyzing the change trend of the draw resistance during successive puffs of cigarette sticks.

[0006] In the first aspect, a method for evaluating the burning uniformity of cigarettes is provided, including the following steps:

[0007] S1. Select a predetermined number of cigarettes from the cigarette samples as the test cigarette sticks;

[0008] S2. Perform cigarette puffing under fixed puffing conditions;

[0009] S3. Record the instantaneous pressure drop in the air flow channel during each puff, and determine the draw resistance of the current puff according to the instantaneous pressure drop;

[0010] S4. Determine the successive moving change rate according to the draw resistance;

[0011] S5. Calculate and output the burning uniformity evaluation index according to the successive moving change rate; determine the uniformity and stability of the cigarette burning process according to the burning uniformity evaluation index.

[0012] In an implementable manner, in step S5, compare the burning uniformity evaluation indexes of two or more different cigarette sticks. The smaller the burning uniformity evaluation index, the better the uniformity and stability of the cigarette stick.

[0013] In an implementable manner, in step S3, determining the draw resistance of the current puff based on the instantaneous pressure drop includes at least the following: using the average value of the instantaneous pressure drop within each puffing time as the draw resistance of the current puff.

[0014] In an implementable manner, after step S1, the selected cigarette is placed in a constant temperature and humidity condition for temperature and humidity adjustment.

[0015] In an implementable manner, the constant temperature and humidity condition includes: setting the temperature to 20 - 24 °C and setting the humidity to 55 - 65%.

[0016] In an implementable manner, in step S2, the fixed puffing conditions of the cigarette are determined according to the type or brand of the cigarette sample.

[0017] In an implementable manner, in step S4, determining the per - puff moving change rate includes at least the following: where: i is the number of randomly selected cigarette sticks, j is the number of puffs for each cigarette, P ij is the draw resistance of the current puff, and x i is the per - puff moving change rate.

[0018] In an implementable manner, in step S5, calculating the combustion uniformity evaluation index includes at least the following: where: i is the number of randomly selected cigarette sticks, and the maximum value of i is m.

[0019] According to the second aspect of the present application, there is also provided a cigarette combustion uniformity evaluation system, including a memory and a processor. The memory stores a computer program, and when the program is executed by the processor, it implements the cigarette combustion uniformity evaluation method provided in the first aspect.

[0020] Compared with the prior art, the beneficial effects of the present application are as follows:

[0021] In the technical solution of the present application, it is possible to reflect the change in the combustion state of the cigarette during per - puff combustion according to the change trend of the per - puff draw resistance of the cigarette stick during combustion. By analyzing the change trend of the draw resistance of the cigarette stick during per - puff combustion, the combustion uniformity of the cigarette can be characterized. According to the cigarette combustion uniformity evaluation method and system provided by the present application, there is no need for a smoking assessor to conduct a smoking assessment, and the combustion uniformity of a batch of cigarettes can be evaluated, greatly saving manpower and time. It can intuitively characterize the combustion uniformity of different cigarettes and provide an important reference for cigarette design and quality evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a flowchart of the cigarette combustion uniformity evaluation method according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further describes in detail the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention and are not intended to limit the present invention.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, in the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0027] According to the first aspect of the present application, referring to Figure 1 , first, a method for evaluating the burning uniformity of cigarettes is provided, including the following steps:

[0028] S1. Select a predetermined number of cigarettes from the cigarette samples as the cigarettes to be tested; specifically, randomly select i cigarettes (i = 1, 2, 3,... m).

[0029] In an implementable manner, after step S1, the selected cigarettes are placed in a constant temperature and humidity condition for temperature and humidity adjustment to eliminate the differences in temperature and humidity and ensure the accuracy of the detection.

[0030] Specifically, the temperature in this embodiment is set to 22°C and the humidity is set to 60% RH.

[0031] S2. Perform cigarette suction under fixed suction conditions, and each cigarette is suctioned j times, where j = 1, 2, 3,... n.

[0032] S3. Record the instantaneous pressure drop in the air flow channel during each suction, and use the average value of the instantaneous pressure drop within the suction time of each suction as the draw resistance P of the current suctionij ,

[0033] S4. Determine the per-puff moving change rate according to the draw resistance P ij and determine the per-puff moving change rate x i =

[0034]

[0035] S5. Calculate the burning and smoking uniformity evaluation index X according to the per-puff moving change rate. The burning and smoking uniformity evaluation index

[0036]

[0037] Example 1:

[0038] In this example, the burning and smoking uniformity of cigarettes of Brand A and Brand B is evaluated. The specific steps are as follows:

[0039] S1. Randomly select 20 cigarettes of each of Brand A and Brand B, and perform temperature and humidity adjustment for 48 hours under the constant temperature and humidity conditions of 22°C and 60% RH.

[0040] S2. Under the standard smoking conditions, use a smoking machine to smoke the cigarettes of Brand A and Brand B respectively. Each cigarette of Brand A is smoked 6 puffs, and each cigarette of Brand B is smoked 5 puffs.

[0041] It should be noted that the standard smoking conditions are a smoking volume of 35 mL, a smoking duration of 2 s, a smoking interval of 60 s, and a bell-shaped smoking curve is used for smoking.

[0042] S3. Obtain and record the per-puff draw resistance P of the cigarette sticks of Brand A and Brand B ij , as shown in Table 1 and Table 2.

[0043] Table 1 Per-puff draw resistance P of cigarette sticks of Brand A ij Record table

[0044]

[0045]

[0046] Table 2 Per-puff draw resistance P of cigarette sticks of Brand B ij Record table

[0047]

[0048] S4. Calculate and determine the per-puff moving change rate of the cigarette sticks of Brand A and Brand B according to the draw resistance P ij The per-puff moving change rate x of the cigarette sticks of Brand A and Brand B i is shown in Table 3.

[0049] Table 3 Record of the puff-by-puff movement change rate of brand A and brand B cigarettes

[0050]

[0051]

[0052] S5. Calculate the burning and inhalation uniformity evaluation index, and evaluate the uniformity of cigarettes of brand A and brand B according to the burning and inhalation uniformity evaluation index of the cigarettes.

[0053] Specifically, the combustion and inhalation uniformity evaluation index of brand A is X A =151, brand B's combustion and inhalation uniformity evaluation index X B = 263. Therefore, the combustion and inhalation uniformity evaluation index of brand A is smaller, the combustion and inhalation uniformity of brand A is better than that of brand B, and the combustion and inhalation process of brand A is more stable.

[0054] Embodiment 2:

[0055] This embodiment evaluates the smoking uniformity of cigarettes of different specifications of the same brand, and specifically includes the following steps:

[0056] S1. Randomly select 10 regular cigarettes M and 10 medium cigarettes N of the same brand, and adjust the temperature and humidity for 48 hours at a constant temperature and humidity of 22° C. and 60% RH.

[0057] S2. Puffing is performed using actual puffing parameters of a typical smoker when smoking a cigarette.

[0058] Specifically, the conventional cigarette M is smoked with a puff volume of 57 mL, a puff duration of 2.7 s, a puff interval of 22 s, and a bell-shaped puff curve. The medium cigarette N is smoked with a puff volume of 35 mL, a puff duration of 2 s, a puff interval of 60 s, and a bell-shaped puff curve.

[0059] When smoking the conventional cigarette M and the medium cigarette N, each cigarette is smoked 9 times.

[0060] S3. Obtain and record the puff resistance P of the regular cigarette M and the medium cigarette N respectively. ij , as shown in Table 4 and Table 5.

[0061] Table 4 Puff resistance record table for conventional cigarette M cigarettes

[0062]

[0063] Table 5 Puff-by-puff resistance record table for N cigarettes

[0064]

[0065] S4. Determine, based on the draw resistance P ij the rate of change of the cigarette rod moving mouth by mouth for the regular cigarette M and the medium cigarette N, and the rate of change of the cigarette rod moving mouth by mouth for the regular cigarette M and the medium cigarette N is x i as shown in Table 6.

[0066] Table 6 Rate of change of the cigarette rod of cigarettes M and N moving mouth by mouth

[0067] Cigarette serial number M N 1 0.1154 0.2884 2 0.1278 0.1698 3 0.2474 0.2234 4 0.1991 0.2913 5 0.1546 0.1450 6 0.1746 0.2312 7 0.1474 0.2264 8 0.2424 0.1943 9 0.2011 0.3155 10 0.2025 0.1527

[0068] S5. Calculate the combustion uniformity evaluation index, and evaluate the combustion uniformity of the cigarette rods of the regular cigarette M and the medium cigarette N according to the combustion uniformity evaluation index of the cigarette rods.

[0069] Specifically, the combustion uniformity evaluation index X of the regular cigarette M M = 181, and the combustion uniformity evaluation index X of the medium cigarette N N = 224.

[0070] For the same typical smoker, when sucking the regular cigarette M, the combustion uniformity evaluation index is 181, and when sucking the medium cigarette N, the combustion uniformity evaluation index is 224. Therefore, the combustion uniformity of sucking the regular cigarette M is better and the combustion is more stable. That is, this characteristic smoker may think that the combustion uniformity of cigarette M is better and make a better sensory evaluation of cigarette M. This can be used as a reference for the sensory evaluation of different cigarettes by simulated smokers.

[0071] According to the second aspect of the present application, there is also provided a cigarette combustion uniformity evaluation system, including a memory and a processor. The memory stores a computer program, and when the program is executed by the processor, it implements the cigarette combustion uniformity evaluation method provided in the first aspect.

[0072] In summary, the present application can reflect the change of the combustion state of the cigarette during the combustion process mouth by mouth according to the change trend of the draw resistance of the cigarette rod during the combustion process. By analyzing the change trend of the draw resistance of the cigarette rod during the combustion process mouth by mouth, the combustion uniformity of the cigarette can be characterized. According to the cigarette combustion uniformity evaluation method and system provided by the present application, there is no need for a smoking assessor to conduct a smoking assessment, and the combustion uniformity of a batch of cigarettes can be evaluated, which greatly saves manpower and time. It can intuitively characterize the combustion uniformity of different cigarettes and provide an important reference for cigarette design and quality evaluation.

[0073] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A method for evaluating the burning uniformity of cigarettes, characterized in that, It includes the following steps: S1. Select a predetermined number of cigarettes from the cigarette samples as the cigarettes to be tested; S2. Conduct cigarette puffing under fixed puffing conditions; S3. Record the instantaneous pressure drop in the air flow channel during each puff, and determine the draw resistance of the current puff according to the instantaneous pressure drop; S4. Determine the per-puff moving change rate according to the draw resistance; S5. Calculate and output the combustion uniformity evaluation index according to the per-puff moving change rate; determine the uniformity and stability of the cigarette combustion process according to the combustion uniformity evaluation index.

2. The cigarette burning uniformity evaluation method according to claim 1, wherein In step S5, compare the combustion uniformity evaluation indexes of two or more different cigarettes. The smaller the combustion uniformity evaluation index is, the better the uniformity and stability of the cigarette are.

3. The cigarette burning and smoking uniformity evaluation method according to claim 2, wherein In step S3, determining the draw resistance of the current puff according to the instantaneous pressure drop includes at least the following: using the average value of the instantaneous pressure drop within each puff time as the draw resistance of the current puff.

4. The method for evaluating the evenness of cigarette burning and sucking according to claim 3, wherein After step S1, place the selected cigarettes in a constant temperature and humidity condition for temperature and humidity adjustment.

5. The method for evaluating the evenness of cigarette burning according to claim 4, characterized in that, The constant temperature and humidity condition includes: the set temperature is 20 - 24 °C, and the set humidity is 55 - 65%.

6. The cigarette burning uniformity evaluation method according to claim 2, wherein In step S4, determining the per-puff movement change rate at least includes the following: Where: i is the number of randomly selected cigarette sticks, j is the number of puffs for each cigarette, and P ij is the draw resistance for the current puff, and x i is the per-puff movement change rate.

7. The method for evaluating the evenness of cigarette burning and sucking according to claim 6, wherein In step S5, calculating the combustion and inhalation uniformity evaluation index includes at least the following: In the formula: i is the number of cigarette sticks randomly selected, and the maximum value of i is m.

8. The method for evaluating the evenness of cigarette burning according to claim 2, wherein In step S2, determine the fixed puffing conditions of the cigarettes according to the type or brand of the cigarette samples.

9. A cigarette burning uniformity evaluation system, characterized in that, It includes a memory and a processor. The memory stores a computer program, and when the program is executed by the processor, it implements the cigarette combustion uniformity evaluation method according to any one of claims 1 to 8.

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