Segmented draw resistance nondestructive testing system for heated cigarettes

Abstract

The utility model discloses a heating cigarette segmented draw resistance nondestructive detection system and a detection method thereof. The heating cigarette segmented draw resistance nondestructive detection system comprises a sample feeding unit, a draw resistance unit and a computer system, the suction resistance unit comprises a plurality of electromagnetic valves and a plurality of latex tubes, and the electromagnetic valves are used for switching the opening and closing states of the latex tubes and the on-off states of all pipelines so as to realize different test conditions of open suction resistance, side face closed suction resistance, end face closed suction resistance and reverse end closed suction resistance. According to the utility model, negative pressure is applied to different parts of a sample in a combined manner, the open draw resistance, the side closed draw resistance, the end face closed draw resistance and the reverse end closed draw resistance of the heated cigarette are recorded in real time through the pressure sensor, and the draw resistance characteristics of each section of the heated cigarette are obtained, so that sectional nondestructive testing is realized. The segmented draw resistance nondestructive testing system disclosed by the utility model can realize high-precision and multi-segment independent and combined draw resistance measurement, and meets various application requirements.

Description

Technical Field

[0001] The utility model belongs to the technical field of tobacco detection, and particularly relates to a non-destructive detection system for the segmented draw resistance of heated cigarettes. Background Technique

[0002] The draw resistance of heated cigarettes is an important index for evaluating the physical quality of heated cigarettes and directly affects the sensory quality of heated cigarette products. The draw resistance of normally commercially available (international market) heated cigarettes is different from that of traditional cigarettes. Generally, during the consumption process, the cigarette holder adds draw resistance to the cigarette, and the heated cigarette itself is composed of multiple functional segments, and each segment can generate draw resistance during the suction process, and the draw resistance of the heated cigarette is jointly formed by them. Measuring the draw resistance of each part of the heated cigarette, especially the filter tip section and the tobacco rod section, different types of heated cigarettes have air flow channels or perforations with ventilation effects in the hollow section or the filter tip end. After the draw resistance is formed, it will also affect the product quality index. The measurement of the segmented draw resistance is crucial for the control of quality indexes and their stability during the production process. At present, there are the following problems in the measurement of the draw resistance of heated cigarettes: 1. The draw resistance of the heated cigarette obtained by the standard method of GB / T22838.5-2009 is integral and cannot obtain the draw resistance of a certain section of the heated cigarette. 2. Heated cigarettes are currently divided into two types. One is the HNB (Heated Not Burn) with an open end, and the other is the NSC (Natural Smoke Cigarettes) with a closed end (Contributions to Tobacco&NicotineResearch, 2022, 31(3): 162-174.). Both have a tobacco rod section, a hollow section, and a filter tip section. Especially for NSC heated cigarettes, during use, the air flow does not pass through the heated tobacco rod. The draw resistance is formed by the air flow channels formed by perforations in the hollow section or the filter tip section, and then the draw resistance formed by the hollow section + the filter tip section or the filter tip section. There is no test method for this type of heated cigarette in all current test methods. 3. During the test, if the measured draw resistance of the heated cigarette is unstable, it is impossible to quickly know the stability degree of the draw resistance of each part of the heated cigarette stick through the fluctuation degree of the integral draw resistance. If you want to know the contribution rate of each section such as the tobacco section, the air flow channel in the hollow section, and the draw resistance of the filter tip section to the draw resistance value, it is necessary to cut the heated cigarette into multiple sections for separate measurement. This method not only has a long measurement period, is time-consuming and laborious, but also brings measurement errors.

[0003] Therefore, in actual operation, how to measure the draw resistance of each section of the heated cigarette and how to measure the draw resistance of the NSC heated cigarette are urgent problems that people need to solve.

[0004] In order to solve the above problems, the present utility model is proposed. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a non-destructive detection system and method for the segmented draw resistance of heated tobacco products in view of the deficiencies of the prior art. The present utility model applies negative pressure to different parts of the sample to obtain its draw resistance characteristics, and further processes and analyzes the measurement results of the pressure sensor, so as to achieve segmented non-destructive detection. The segmented draw resistance non-destructive detection system of the present utility model can realize high-precision, multi-segment and flexible combination (single and combined) measurement of the draw resistance of heated tobacco products, meeting various application requirements.

[0006] The present utility model provides a non-destructive detection system for the segmented draw resistance of heated tobacco products, which includes a sample feeding unit, a draw resistance unit and a computer system;

[0007] The sample feeding unit is used to feed the sample into the probe of the draw resistance unit from above. The sample feeding unit includes a cylinder, and the precise position of the sample in the probe of the draw resistance unit is controlled by the cylinder;

[0008] The draw resistance unit includes a plurality of solenoid valves and a plurality of latex tubes. The solenoid valves are used to switch the opening and closing states of the latex tubes and the on-off of each pipeline to realize different test conditions of open draw resistance, side closed draw resistance, end face closed draw resistance and reverse end closed draw resistance;

[0009] The probe of the draw resistance unit adopts a multi-section segmented design, and each section has an accurate scale indication for adjusting the position;

[0010] The draw resistance unit further includes a pressure sensor, which is used to measure the open draw resistance, side closed draw resistance, end face closed draw resistance and reverse end closed draw resistance of the sample in real time, and transmit the obtained data to the computer system;

[0011] The computer system records and analyzes the pressure data, and obtains the draw resistance data of each section of the sample according to the open draw resistance, side closed draw resistance, end face closed draw resistance and reverse end closed draw resistance data.

[0012] Among them, the open draw resistance refers to the situation where both the tobacco section and the filter section of the heated tobacco product are open, and there are pores in the hollow section or the filter section has ventilation holes. The side closed draw resistance refers to the situation where both the tobacco section and the filter section of the heated tobacco product are open, and there are pores in the hollow section or the filter section has ventilation holes, but it is in a closed state. The end face closed draw resistance refers to the situation where the tobacco section of the heated tobacco product is closed, the filter section is open, and there are pores in the hollow section or the filter section has ventilation holes. The reverse end closed draw resistance refers to the situation where the tobacco section of the heated tobacco product is open, the filter section is closed, and there are pores in the hollow section or the filter section has ventilation holes.

[0013] Preferably, the probe of the draw resistance unit is suitable for measuring samples with a length of 45 - 100 mm.

[0014] Preferably, the draw resistance unit adopts a multi-section segmented design, and each adjustment position has a scale indication.

[0015] Preferably, the probe of the draw resistance unit has a hierarchical sealing structure.

[0016] The length of the latex tube covering the sample corresponds to the length indicated by the scale for each adjustment position, and the hierarchical sealing is also to adapt to different sample lengths. During the actual operation process, according to the different lengths of the test samples, the position of the sample is adjusted in combination with the scale indication.

[0017] Preferably, a test sample is accommodated in the probe of the draw resistance unit, and there are a top sealing pipe clamp valve, an upper air flow channel, a middle air flow channel, a lower air flow channel and a bottom sealing inclined block around the probe. The opening and closing states of the top sealing pipe clamp valve, the upper air flow channel, the middle air flow channel, the lower air flow channel and the bottom sealing inclined block are realized by switching the opening and closing states of the latex tube and the on-off of each pipeline through the solenoid valve.

[0018] Preferably, the latex tube has an automatic monitoring function, and when the latex tube is damaged, a replacement reminder is sent in time.

[0019] Preferably, a tobacco blowing pipeline is provided inside the probe of the draw resistance unit, which can automatically clean impurities such as tobacco and dust inside the probe of the draw resistance unit.

[0020] When using the segmented draw resistance non-destructive testing system of the present invention, the segmented draw resistance non-destructive testing method includes the following steps:

[0021] S1. The sample feeding unit feeds the sample into the probe of the draw resistance unit from above, and the cylinder controls the precise position of the sample in the probe of the draw resistance unit;

[0022] S2. The opening and closing states of the latex tube and the on-off of each pipeline are switched through the solenoid valve to realize different test conditions of open draw resistance, side-closed draw resistance, end-closed draw resistance and reverse-end closed draw resistance;

[0023] S3. The pressure sensor measures the open draw resistance, side-closed draw resistance, end-closed draw resistance and reverse-end closed draw resistance of the sample in real time, and transmits the obtained data to the computer system;

[0024] S4. The computer system records and analyzes the pressure data, and obtains the draw resistance data of each section of the sample according to the open draw resistance, side-closed draw resistance, end-closed draw resistance and reverse-end closed draw resistance data.

[0025] Preferably, the draw resistance unit includes a probe head, a test sample is accommodated in the probe head, and a top sealing pipe clamp valve, an upper air flow channel, a middle air flow channel, a lower air flow channel and a bottom sealing inclined block are provided around the probe head;

[0026] The open draw resistance refers to the situation where both the tobacco section and the filter section of the heated cigarette are open, and there are pores in the hollow section or the filter section has ventilation holes; when detecting the open draw resistance situation, the middle air flow channel, the top sealing pipe clamp valve and the lower air flow channel are opened, while the upper air flow channel and the bottom sealing inclined block are closed;

[0027] The side-closed draw resistance refers to the situation where both the tobacco section and the filter section of the heated cigarette are open, and there are pores in the hollow section or the filter section has ventilation holes, but it is in a closed state; when detecting the side-closed draw resistance situation, the middle air flow channel and the upper air flow channel are closed, while the top sealing pipe clamp valve, the lower air flow channel and the bottom sealing inclined block are opened;

[0028] The end-face closed draw resistance refers to the situation where the tobacco section of the heated cigarette is closed, the filter section is open, and there are pores in the hollow section or the filter section has ventilation holes; when detecting the end-face closed draw resistance situation, the top sealing pipe clamp valve, the upper air flow channel and the bottom sealing inclined block are closed, while the middle air flow channel and the lower air flow channel are opened;

[0029] The reverse-end closed draw resistance refers to the situation where the tobacco section of the heated cigarette is open, the filter section is closed, and there are pores in the hollow section or the filter section has ventilation holes; when detecting the reverse-end closed draw resistance situation, the top sealing pipe clamp valve, the middle air flow channel and the bottom sealing inclined block are closed, while the upper air flow channel and the middle air flow channel are opened.

[0030] Compared with the prior art, the present utility model has the following beneficial effects:

[0031] 1. High-precision segmented measurement: This system applies negative pressure to different parts of the heated cigarette and records the open draw resistance, side-closed draw resistance, end-face closed draw resistance and reverse-end closed draw resistance in real time through a pressure sensor, so as to obtain the draw resistance characteristics of each section of the heated cigarette. This system uses a high-precision pressure sensor to achieve precise draw resistance measurement of various parts of the heated cigarette (such as the tobacco section, the hollow section, the filter section). This precise segmented measurement helps to achieve more detailed quality traceability and process optimization.

[0032] 2. Non-destructive testing: The system design avoids the cutting operation in the traditional method and can complete the draw resistance detection without damaging the sample. This non-destructive testing method not only improves the measurement efficiency, but also reduces the potential test errors caused by sample damage, ensuring the accuracy and reliability of the detection results.

[0033] 3. Automation and Intelligence: The system is configured with automatic monitoring and automatic cleaning functions. The automatic monitoring of the latex tube status can send replacement reminders in a timely manner to avoid measurement failures caused by pipeline breakage. The tobacco cut filler blowing pipeline inside the probe can automatically clean the impurities inside the probe, reducing manual intervention and improving the automation level of the detection process and the long-term stability of the equipment.

[0034] 4. High Efficiency and Energy Saving: This system reduces the time and energy consumption of manual operation in the traditional method through the precision control of the needle-shaped cylinder for sample position and the latex tube controlled by the solenoid valve. The automated detection process significantly shortens the measurement cycle, improves work efficiency, and reduces labor intensity and operation and maintenance costs.

[0035] 5. Flexible Adaptability: The system adopts a multi-section segmented design for the probe, and the probe of the draw resistance unit has a hierarchical sealing structure. The system can be applied to heated tobacco products with a length in the range of 45 - 60 mm and can adjust the test conditions according to actual needs. This design flexibility enables the system to meet the detection requirements of different types of heated tobacco products and improves the applicable range and practicality of the system. Description of the Drawings

[0036] Figure 1 It is a schematic structural diagram of the segmented draw resistance non-destructive detection system in the embodiment.

[0037] Figure 2 It is a schematic structural diagram of the draw resistance unit.

[0038] Names of the reference numerals in the description of the drawings: 1. Top sealing pipe clamp valve; 2. Upper air flow channel; 3. Middle air flow channel; 4. Lower air flow channel; 5. Bottom sealing inclined block. Detailed Embodiments

[0039] The following further describes the present utility model in detail in conjunction with the embodiments.

[0040] Those skilled in the art will understand that the following embodiments are only used to illustrate the present utility model and should not be construed as limiting the scope of the present utility model. For those not specified in the embodiments regarding specific technologies or conditions, they shall be carried out according to the technologies or conditions described in the literature in this field or according to the product specifications. For those materials or equipment not specified regarding the manufacturer, they are all conventional products that can be obtained by purchase.

[0041] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the" and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the description of the present utility model means the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we say an element is "connected" to another element, it can be directly connected to other elements, or there may also be intermediate elements. In addition, the "connection" used herein may include wireless connection.

[0042] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more. The orientation or positional relationship indicated by terms such as "inside", "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0043] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", "provided with" 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. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] Those skilled in the art can understand that, unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as the general understanding of those of ordinary skill in the field to which the present utility model belongs. It should also be understood that terms such as those defined in a general dictionary should be understood as having a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless defined as here.

[0045] The structural schematic diagram is as Figure 1-2 shown. This embodiment is a segmented suction resistance non-destructive testing system, which includes a sample feeding unit, a suction resistance unit and a computer system;

[0046] The sample feeding unit is used to feed the sample into the probe of the suction resistance unit from above. The sample feeding unit includes a cylinder, and the precise position of the sample in the probe of the suction resistance unit is controlled by the cylinder;

[0047] The draw resistance unit includes a plurality of solenoid valves and a plurality of latex tubes. The solenoid valves are used to switch the opening and closing states of the latex tubes and the on-off states of each pipeline, so as to realize different test conditions of open draw resistance, side-closed draw resistance, end-closed draw resistance, and reverse-end closed draw resistance;

[0048] The probe of the draw resistance unit adopts a multi-section segmented design, and each section's adjustment position has an accurate scale indication;

[0049] The draw resistance unit further includes a pressure sensor, which is used to measure the open draw resistance, side-closed draw resistance, end-closed draw resistance, and reverse-end closed draw resistance of the sample in real time, and transmit the obtained data to the computer system;

[0050] The computer system records and analyzes the pressure data, and obtains the draw resistance data of each section of the sample according to the open draw resistance, side-closed draw resistance, end-closed draw resistance, and reverse-end closed draw resistance data.

[0051] Among them, the open draw resistance refers to the situation where both the tobacco section and the filter section of the heated cigarette are open, and the ventilation holes in the hollow section are open. The side-closed draw resistance refers to the situation where both the tobacco section and the filter section of the heated cigarette are open, and the ventilation holes in the hollow section are closed. The end-closed draw resistance refers to the situation where the tobacco section of the heated cigarette is closed, the filter section is open, and the ventilation holes in the hollow section are open. The reverse-end closed draw resistance refers to the situation where the tobacco section of the heated cigarette is open, the filter section is closed, and the ventilation holes in the hollow section are open.

[0052] The draw resistance unit adopts a multi-section segmented design, and each section's adjustment position has a scale indication.

[0053] The probe of the draw resistance unit has a hierarchical sealing structure.

[0054] The corresponding scale indication for each section's adjustment position is the length of the latex tube covering the sample, and the hierarchical sealing is also to adapt to different sample lengths. During the actual operation process, according to the different lengths of the test samples, the position of the sample is adjusted in combination with the scale indication.

[0055] The probe of the draw resistance unit accommodates a test sample, and there are a top sealing pipe clamp valve, an upper air flow channel, a middle air flow channel, a lower air flow channel, and a bottom sealing inclined block around the probe. The opening and closing states of the top sealing pipe clamp valve, the upper air flow channel, the middle air flow channel, the lower air flow channel, and the bottom sealing inclined block are realized by the solenoid valves switching the opening and closing states of the latex tubes and the on-off states of each pipeline.

[0056] The latex tube state has an automatic monitoring function, and when the latex tube is damaged, a replacement reminder is sent in time.

[0057] Inside the probe of the draw resistance unit, there is a tobacco blowing pipeline, which can automatically clean impurities such as tobacco and dust inside the probe of the draw resistance unit.

[0058] The segmented draw resistance non-destructive testing method, using the segmented draw resistance non-destructive testing system, includes the following steps:

[0059] S1. The sample loading unit feeds the sample into the probe of the draw resistance unit from above, and controls the precise position of the sample in the probe of the draw resistance unit through the cylinder;

[0060] S2. By switching the opening and closing states of the latex tube and the on-off of each pipeline through the solenoid valve, different test conditions such as open draw resistance, side closed draw resistance, end face closed draw resistance, and reverse end closed draw resistance are realized;

[0061] S3. The pressure sensor measures the open draw resistance, side closed draw resistance, end face closed draw resistance, and reverse end closed draw resistance of the sample in real time, and transmits the obtained data to the computer system;

[0062] S4. The computer system records and analyzes the pressure data, and obtains the draw resistance data of each section of the sample according to the open draw resistance, side closed draw resistance, end face closed draw resistance, and reverse end closed draw resistance data.

[0063] The draw resistance unit includes a probe, a test sample is accommodated in the probe, and there are a top sealing pipe clamp valve, an upper air flow channel, a middle air flow channel, a lower air flow channel, and a bottom sealing inclined block around the probe;

[0064] Open draw resistance means that both the tobacco section and the filter section of the heated cigarette are open, and the ventilation holes in the hollow section are open; when detecting the open draw resistance situation, the middle air flow channel, the top sealing pipe clamp valve, and the lower air flow channel are open, while the upper air flow channel and the bottom sealing inclined block are closed;

[0065] Side closed draw resistance means that both the tobacco section and the filter section of the heated cigarette are open, and the ventilation holes in the hollow section are closed; when detecting the side closed draw resistance situation, the middle air flow channel and the upper air flow channel are closed, while the top sealing pipe clamp valve, the lower air flow channel, and the bottom sealing inclined block are open;

[0066] End face closed draw resistance means that the tobacco section of the heated cigarette is closed, the filter section is open, and the ventilation holes in the hollow section are open; when detecting the end face closed draw resistance situation, the top sealing pipe clamp valve, the upper air flow channel, and the bottom sealing inclined block are closed, while the middle air flow channel and the lower air flow channel are open;

[0067] The reverse-end closed draw resistance refers to the situation where the tobacco section of the heated cigarette is open, the filter section is closed, and the ventilation holes in the hollow section are open; when detecting the reverse-end closed draw resistance situation, the top sealed pipe clamp valve, the middle air flow channel, and the bottom sealed inclined block are closed, while the upper air flow channel and the middle air flow channel are open.

[0068] Example 1:

[0069] The length of the sample to be tested is 45 mm.

[0070] 1. Measurement of side closed draw resistance

[0071] System settings: When measuring the side closed draw resistance △P1, the draw resistance unit in the instrument closes the middle air flow channel 3 and the upper air flow channel 2, and at the same time opens the top sealed pipe clamp valve 1 and the lower air flow channel 4, and closes the bottom sealed inclined block 5. Such settings ensure that both ends of the cigarette are open, enabling the air flow to pass through the tobacco section, the hollow section, and the filter section.

[0072] Operating status: ① Open ② Closed ③ Closed ④ Open ⑤ Closed.

[0073] Calculation formula: The measured side closed draw resistance △P1 can be calculated by formula (1):

[0074] R1 + R2 = △P1

[0075] Wherein, R1 is the draw resistance of the tobacco section, and R2 is the draw resistance of the filter section.

[0076] 2. Measurement of end face closed draw resistance

[0077] System settings: When measuring the end face closed draw resistance △P2, the draw resistance unit in the instrument closes the top sealed pipe clamp valve 1, the upper air flow channel 2, and the bottom sealed inclined block 5, and at the same time opens the middle air flow channel 3 and the lower air flow channel 4. Such settings make the tobacco section closed, and the air flow enters from the air inlet hole of the hollow section and passes through the lower half of the hollow section and the filter section.

[0078] Operating status: ① Closed ② Closed ③ Open ④ Open ⑤ Closed.

[0079] Calculation formula: The measured end face closed draw resistance △P2 can be calculated by formula (2):

[0080] R3 + R2 = △P2

[0081] Wherein, R3 is the draw resistance of the holes opened on the side wall of the hollow section, and R2 is the draw resistance of the filter section.

[0082] 3. Measurement of reverse-end suction end face closed draw resistance

[0083] System settings: When measuring the reverse suction end face closed suction resistance △P3, the suction resistance unit in the instrument closes the top sealed tube clamp valve 1, the middle air flow channel 3, and the bottom sealed inclined block 5, and at the same time opens the upper air flow channel 2 and the middle air flow channel 3. Such settings ensure that the filter tip section is closed, and the air flow enters from the air inlet hole of the hollow section and flows through the upper half of the hollow section and the tobacco section.

[0084] Operating status: ①Closed ②Open ③Open ④Closed ⑤Closed.

[0085] Calculation formula: The measured reverse suction end face closed suction resistance △P3 can be calculated by formula (3):

[0086] R1 + R3 = △P3

[0087] Wherein, R1 is the suction resistance of the tobacco section, and R3 is the suction resistance of the holes opened on the side wall of the hollow section.

[0088] Comprehensive test and calculation

[0089] After placing the cigarette on the comprehensive test platform, the side closed suction resistance △P1, the end face closed suction resistance △P2, and the reverse suction end face closed suction resistance △P3 can be obtained through the measurement of the above three suction resistances. Using the following three equations:

[0090] R1 + R2 = △P1 (1)

[0091] R3 + R2 = △P2 (2)

[0092] R1 + R3 = △P3 (3)

[0093] The suction resistance values of each section can be obtained by solving these equations: the suction resistance R1 of the tobacco section, the suction resistance R2 of the hollow section, and the suction resistance R3 of the filter tip section.

[0094] Through the above embodiments, accurate measurement of the suction resistance of different parts of the cigarette can be achieved, ensuring the non-destructiveness and high precision of the detection process.

[0095] Select 8 samples and repeat the above process to obtain the values of R1, R2, and R3 respectively, as shown in Table 1

[0096]

[0097] Furthermore, to improve the test accuracy, the suction resistance of the hollow section, L - the length of the hollow section of the cigarette (mm), and a - the distance from the air hole to the tobacco section are introduced into the test method. The specific implementation is as follows: The CCD measurement element measures the length of the hollow section of the cigarette and the distance from the air hole to the tobacco section, and introduces them into the formulas of the side closed suction resistance △P1, the end face closed suction resistance △P2, and the reverse suction end face closed suction resistance △P3. The specific modification is

[0098] R1 + R2 + 10 = △P1 (1)

[0099]

[0100] The 10 in formula (1) is the suction resistance value of the hollow section. The corrected suction resistance values of each section are obtained by using the equations: the suction resistance of the tobacco section R1, the suction resistance of the hollow section R2, and the suction resistance of the filter section R3.

[0101] Select 8 samples and repeat the above process to obtain the corrected values of R1, R2, and R3 respectively, as shown in Table 2.

[0102]

[0103] By comparing Table 1 and Table 2, the test accuracy of the sectional suction resistance test method after adopting the correction scheme has increased significantly.

[0104] Example 2: Measurement of the suction resistance of an NSC heated cigarette with a product whose end needs to be sealed

[0105] The length of the sample to be tested is 45 mm.

[0106] The specific implementation steps are as follows:

[0107] System preparation: Select to measure the suction resistance of the sealed end face. In this case, the suction resistance unit in the suction resistance measuring instrument closes the top sealing tube clamp valve 1, the upper air flow channel 2, and the bottom sealing inclined block 5 to ensure that the air flow only flows in the required area.

[0108] Operating state: ①Closed ②Closed ③Open ④Open ⑤Closed.

[0109] Airflow control: Then, open the middle air flow channel 3 and the lower air flow channel 4. At this time, the air flow will enter from the air inlet hole of the hollow section and flow through the lower half of the hollow section and the filter section.

[0110] Data acquisition: The instrument measures the suction resistance under the specified operating conditions, records the pressure change when the air flow passes through the hollow section and the filter section, and calculates the suction resistance value of the NSC heated cigarette.

[0111] Example 3: Measurement of the suction resistance of an unperforated HNB heated cigarette

[0112] The length of the sample to be tested is 45 mm.

[0113] The specific implementation steps are as follows:

[0114] System preparation: Select to measure the suction resistance of the sealed side. Set the suction resistance unit inside the instrument, close the middle air flow channel 3 and the upper air flow channel 2, and at the same time open the top sealing tube clamp valve 1 and the lower air flow channel 4, and close the bottom sealing inclined block 5 to ensure that both ends of the cigarette are open.

[0115] Operating state: ①Open ②Closed ③Closed ④Open ⑤Closed.

[0116] Airflow control: In this configuration, the airflow will enter from both ends of the cigarette rod, passing through the tobacco section, the hollow section, and the filter section. The airflow path passes through each section, enabling accurate measurement of the draw resistance of each part.

[0117] Data acquisition: The instrument measures the draw resistance under predetermined operating conditions, records the pressure changes when the airflow passes through the tobacco section, the hollow section, and the filter section, and calculates the side-sealed draw resistance, i.e., the draw resistance of the non-perforated HNB heated cigarette.

[0118] Example 4, Measurement of the draw resistance of perforated HNB

[0119] System preparation: Select to measure the open draw resistance. Configure the internal draw resistance unit of the instrument to open the middle airflow channel 3, close the upper airflow channel 2, open the top seal clamp valve 1 and the lower airflow channel 4 at the same time, and close the bottom seal bevel 5. This configuration makes both ends and the side wall of the cigarette rod completely open.

[0120] Operating state: ①Closed ②Open ③Open ④Open ⑤Closed.

[0121] Airflow control: In this state, the airflow will enter the tobacco section and the hollow section through the openings of the cigarette rod, and flow into the interior of the cigarette rod through the perforations, passing through each section of the tobacco section, the hollow section, and the filter section.

[0122] Data acquisition: Under predetermined operating conditions, the instrument records the pressure changes when the airflow passes through each section and calculates the open draw resistance value, i.e., the draw resistance of the perforated HNB.

Claims

1. A nondestructive testing system for segmented draw resistance of heated cigarettes, characterized in that: It includes a sample loading unit, an absorption resistance unit and a computer system; The sample loading unit is used to transport the sample to the probe of the resistance absorption unit, and the sample loading unit includes a cylinder, and the position of the sample in the probe of the resistance absorption unit is controlled by the cylinder; The draw resistance unit includes a plurality of solenoid valves and a plurality of latex tubes, wherein the solenoid valves are used to switch the open and closed states of the latex tubes and the on and off states of each pipeline, so as to realize different test conditions of the open draw resistance, side closed draw resistance, end closed draw resistance and reverse end closed draw resistance of the heated cigarette; The suction resistance unit further comprises a pressure sensor, which is used to measure the open suction resistance, side closed suction resistance, end closed suction resistance and reverse end closed suction resistance of the sample in real time, and transmit the obtained data to the computer system; The computer system records and analyzes the pressure data, and obtains the sample's resistance data for each section based on the open resistance, side-sealed resistance, end-sealed resistance and reverse-end-sealed resistance data.

2. The nondestructive testing system for segmented draw resistance of heated cigarettes according to claim 1, characterized in that: Open draw resistance refers to the situation where the tobacco section and filter section of the heated cigarette are both open, and the hollow section has a hole or the filter section has a ventilation hole; Side closed draw resistance refers to the situation where the tobacco section and filter section of the heated cigarette are both open, and the hollow section has a hole or the filter section has a vent hole and is closed; End-face closed draw resistance refers to the situation where the tobacco section of the heated cigarette is closed, the filter section is open, and the hollow section has a channel or the filter section has a vent hole and is open; Reverse end-closed draw resistance refers to the situation where the tobacco segment of a heated cigarette is open, the filter segment is closed, and the hollow segment has holes or the filter segment has ventilation holes and is open.

3. The nondestructive testing system for segmented draw resistance of heated cigarettes according to claim 1, characterized in that: The probe of the resistance absorption unit is suitable for measuring samples with a length of 45-100 mm.

4. The nondestructive testing system for segmented draw resistance of heated cigarettes according to claim 1, characterized in that: The resistance absorption unit adopts a multi-section segmented design, and each adjustment position has a scale indication.

5. The nondestructive testing system for segmented draw resistance of heated cigarettes according to claim 1, characterized in that: The probe of the resistance absorption unit has a hierarchical sealing structure.

6. The nondestructive testing system for segmented draw resistance of heated cigarettes according to claim 1, characterized in that: The measuring head of the absorption resistance unit contains a test sample, and a top sealing tube clamp valve, an upper air flow channel, a middle air flow channel, a lower air flow channel and a bottom sealing inclined block are arranged around the measuring head.

7. The nondestructive testing system for segmented draw resistance of heated cigarettes according to claim 1, characterized in that: The state of the latex tube has an automatic monitoring function, and when the latex tube is damaged, a replacement reminder is issued in time.

8. The nondestructive testing system for segmented draw resistance of heated cigarettes according to claim 1, characterized in that: A tobacco blowing pipeline is arranged inside the measuring head of the suction resistance unit, which can automatically clean the tobacco, dust and impurities inside the measuring head of the suction resistance unit.

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