Detection system and method for determining cigarette smoke concentration

Abstract

The embodiment of the invention provides a detection system and method for determining the smoke concentration of cigarettes, and the system comprises a cavity subsystem which provides a closed environment for containing smoke generated by cigarette combustion; the smoking subsystem is connected with the cavity subsystem, and smoke is sucked from the cavity subsystem in a first smoking period after the cigarette is burnt for a first preset duration; a laser point light source and a power meter probe corresponding to the cigarette smoke concentration characterization subsystem are vertically and oppositely arranged in front of and behind a simulation cavity corresponding to the cavity subsystem, so that the smoke concentration at a target position of the simulation cavity is detected under a first smoking duration and a first stopping duration corresponding to at least one first smoking period. According to the technical scheme, the change of the cigarette smoke concentration in the cigarette smoking process is dynamically detected in real time, the authenticity and accuracy of smoke concentration characterization in the cigarette smoking process are improved, and data support is provided for digital sensory evaluation of the smoke concentration in the smoking process.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of cigarette smoke concentration measurement, and in particular to a detection system and method for determining cigarette smoke concentration. Background Art

[0002] During the cigarette smoking process, the smoke concentration in the oral cavity and its dynamic change characteristics can reflect the physical and sensory properties of cigarettes, and play an important role in the research and development and evaluation of cigarette products.

[0003] The primary technology currently used to measure cigarette smoke concentration is offline static measurement, employing various techniques such as microscopy, light scattering, inertial impaction, electrostatic migration, or gravity sedimentation. However, static measurement requires collecting the smoke and then diluting it with air before measuring the smoke concentration. This results in a complex, inefficient, time-lag-prone process, and a failure to fully capture the entire smoking process. Summary of the Invention

[0004] The embodiments of the present disclosure provide a detection system and method for determining cigarette smoke concentration, so as to dynamically detect changes in cigarette smoke concentration in real time during cigarette smoking, thereby improving the authenticity and accuracy of smoke concentration representation during cigarette smoking.

[0005] In a first aspect, an embodiment of the present disclosure provides a detection system for determining cigarette smoke concentration, the system comprising:

[0006] Cavity subsystem, suction subsystem and cigarette smoke concentration characterization subsystem; among them,

[0007] The cavity subsystem is used to provide a closed environment for containing smoke generated by burning cigarettes;

[0008] The suction subsystem is connected to the cavity subsystem and is used to draw the smoke from the cavity subsystem in a first puff cycle after the cigarette has been burned for a first preset time; wherein each first puff cycle consists of three parts: a first puff duration, a first rest duration, and a second puff duration;

[0009] The laser point light source and power meter probe corresponding to the cigarette smoke concentration characterization subsystem are placed vertically relative to each other in front and behind the simulated cavity corresponding to the cavity subsystem, so as to detect the smoke concentration at the target position of the simulated cavity under the first puff duration and the first rest duration corresponding to at least one of the first puff cycles.

[0010] In a second aspect, an embodiment of the present invention further provides a detection method for determining cigarette smoke concentration, the method comprising:

[0011] Controlling the suction pump to be in an on state, and adjusting the flow control meter so that the actual suction flow rate remains within a first preset range;

[0012] Starting the laser point light source, ensuring that the spot position of the laser point light source on the simulation cavity is consistent with the target position, controlling the power meter probe to be perpendicular to the laser beam of the laser point light source, starting the power meter probe and the power display window, collecting and recording a first power value;

[0013] After the cigarette has been burned for a first preset time, the first timer and the second timer are started to collect a second power value during at least one first puff cycle; wherein the second power value is collected according to the first frequency during the first puff time and the first rest time;

[0014] A representative value of cigarette smoke concentration is determined based on the first power value and the second power value; wherein the representative value of cigarette smoke concentration reflects a trend of change in cigarette smoke concentration.

[0015] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising:

[0016] one or more processors;

[0017] a storage device for storing one or more programs,

[0018] When the one or more programs are executed by the one or more processors, the one or more processors implement the detection method for determining cigarette smoke concentration as described in any one of the embodiments of the present invention.

[0019] In a fourth aspect, an embodiment of the present invention further provides a storage medium comprising computer-executable instructions, wherein the computer-executable instructions, when executed by a computer processor, are used to perform the detection method for determining cigarette smoke concentration as described in any one of the embodiments of the present invention.

[0020] In a fifth aspect, an embodiment of the present invention further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the detection method for determining cigarette smoke concentration as described in any one of the embodiments of the present invention.

[0021] The technical solution of the embodiment of the present disclosure is a detection system for determining the smoke concentration of cigarettes, and the detection system includes a cavity subsystem, a suction subsystem, and a cigarette smoke concentration characterization subsystem. The cavity subsystem is used to provide a closed environment for containing the smoke generated by the burning of cigarettes; the suction subsystem is connected to the cavity subsystem, and is used to extract smoke from the cavity subsystem in a first suction cycle after the cigarette has been burned for a first preset time; the laser point light source and power meter probe corresponding to the cigarette smoke concentration characterization subsystem are placed vertically relative to each other in front and behind the simulated cavity corresponding to the cavity subsystem, so as to detect the smoke concentration at the target position of the simulated cavity under the first suction time and the first stop time corresponding to at least one first suction cycle. This solves the problems in the prior art of using static measurement methods to detect smoke concentration, such as complex detection process operation, low efficiency, time lag, and difficulty in fully reflecting the smoking process of cigarettes. The embodiments of the present invention construct a detection system for determining cigarette smoke concentration, dynamically detect changes in cigarette smoke concentration during cigarette smoking in real time, improve the authenticity and accuracy of smoke concentration representation during cigarette smoking, and provide data support for digital sensory evaluation of smoke concentration during smoking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings introduced here only illustrate some of the embodiments to be described by the present invention, and are not exhaustive. A person skilled in the art can derive other drawings based on these drawings without inventive effort.

[0023] Figure 1 is a schematic diagram of a detection system for determining cigarette smoke concentration provided by an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of a device for dynamically characterizing cigarette smoke concentration provided by an embodiment of the present invention;

[0025] Figure 3 This is a real-life image of the target position of the simulated cavity provided by an embodiment of the present invention;

[0026] Figure 4 is a schematic diagram of a target position of a simulated cavity provided by an embodiment of the present invention;

[0027] Figure 5 1 is a flow chart of a detection method for determining cigarette smoke concentration provided by an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the dynamic change of the flue gas concentration of product A provided by an embodiment of the present invention;

[0029] Figure 7This is a schematic diagram of the dynamic change of the flue gas concentration of product B provided by an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the dynamic change of the flue gas concentration of the C product provided by the embodiment of the present invention;

[0031] Figure 9 It is a structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0033] Before introducing the technical solutions provided by the embodiments of the present disclosure, an example description of the application scenarios can be given first. The technical solutions provided by the embodiments of the present disclosure can be applied in scenarios where the smoke concentration of cigarettes is determined. For example, scenarios where the smoke concentrations generated by cigarettes with different formulas or structures during multiple puffs are monitored and analyzed in real time. Real-time detection of changes in cigarette smoke concentration not only helps to identify and optimize key ingredients in cigarette formulas, but also helps to adjust the structural design of cigarettes to improve combustion uniformity and puffing experience. Based on the technical solutions of the embodiments of the present disclosure, the changes in cigarette smoke concentration during cigarette smoking are dynamically detected in real time, which improves the authenticity and accuracy of the smoke concentration representation during cigarette smoking and provides data support for the digital sensory evaluation of smoke concentration during smoking.

[0034] Example 1

[0035] Figure 1 Schematic diagram of a detection system for determining cigarette smoke concentration provided by an embodiment of the present disclosure. The embodiment of the present disclosure is applicable to situations where the online dynamic change of cigarette smoke concentration is determined.

[0036] like Figure 1 As shown, the detection system for determining cigarette smoke concentration includes: a cavity subsystem 110 , a suction subsystem 120 and a cigarette smoke concentration characterization subsystem 130 .

[0037] The cavity subsystem 110 is used to provide a sealed environment for containing smoke generated by burning cigarettes.

[0038] It should be noted that the cavity subsystem 110 must be well sealed to ensure that smoke generated by cigarette combustion does not leak into the external environment. The good sealing performance of the cavity subsystem can be achieved through high-precision sealing structure, sealing materials and strict assembly process.

[0039] Optionally, the cavity subsystem includes a simulated cavity, a cavity bracket supporting the simulated cavity, a connecting pipeline connected to the suction subsystem, and a gasket directly connected to the simulated cavity.

[0040] The connecting pipeline includes a suction pipeline or a hard pipe pipeline.

[0041] It should be noted that the cavity bracket ensures that the simulated cavity remains stable during testing or experiments to avoid position displacement or damage due to vibration or external forces. The design of the cavity bracket should be compatible with the shape of the simulated cavity. The cavity bracket should be able to support the weight of the simulated cavity and its internal components, as well as additional loads that may be generated by pressure or temperature changes. The selection of the cavity bracket material should take into account its strength, rigidity, and corrosion resistance. Optionally, the cavity bracket should have a certain degree of adjustability to meet the needs of the system.

[0042] It should also be noted that suction piping generally refers to flexible conduits used to extract gases or liquids, enabling fluid transport. Suction piping is flexible, allowing it to bend freely within space and be adjusted and installed as needed, making it ideal for complex environments and confined spaces. A well-sealed suction piping design prevents leaks, ensures safe fluid transport, and improves fluid transport efficiency, enabling stable flow in various environments. Rigid piping refers to pipes made of rigid materials and is typically used to transport gases or liquids. For example, rigid piping can be made of metal or plastic. Like suction piping, the primary function of rigid piping is to transport fluids. Due to its rigidity, rigid piping can withstand higher pressures and temperatures, making it particularly suitable for high-pressure or high-temperature applications. Furthermore, rigid piping provides more precise control of fluid flow, making it ideal for applications requiring precise flow rates. In cigarette smoke concentration detection systems, selecting the appropriate connecting piping type based on specific requirements can effectively improve system efficiency and safety.

[0043] The simulated cavity is used to hold and fix cigarettes and collect the smoke generated during the combustion process of cigarettes.

[0044] It should be noted that the shape of the simulated cavity can be cylindrical, rectangular, or the shape of a human mouth. The volume of the simulated cavity should be sufficient to accommodate the smoke generated by the cigarette during one or more puffs. The volume of the simulated cavity should also ensure that the smoke has sufficient residence time within the simulated cavity to facilitate effective collection and analysis. The simulated cavity can be made of a high-temperature resistant material to ensure that it does not release harmful substances or deform during high-temperature combustion. For example, the simulated cavity can be made of heat-resistant glass.

[0045] In this embodiment, the simulation cavity includes at least one cigarette opening, at least one suction opening, and at least one exhaust opening.

[0046] Among them, a cigarette opening with a first diameter is opened on the side of the simulation cavity connected to the cigarette, and the cigarette opening is used to install gaskets of different specifications; a suction opening and an exhaust opening with a first diameter are respectively opened on the two bottom surfaces connected to the simulation cavity and the suction subsystem, and the suction opening is used to inhale the smoke in the simulation cavity, and the exhaust opening is used to discharge the smoke out of the simulation cavity.

[0047] It should be noted that the first diameter refers to the size of the openings of the cigarette opening, suction port, and exhaust port on the simulated cavity, that is, the diameter. The value of the first diameter must meet the requirements of sealing, smoke flow efficiency, and compatibility. The diameters of different brands or models of cigarettes vary. The first diameter must be larger than the diameter range of the cigarette to ensure that the cigarette can be stably inserted and sealed after the gasket is installed. For example, when the first diameter of the cigarette opening is 8.4mm, in order to adapt to cigarettes with a diameter of 8mm, a 0.2mm thick gasket can be used to achieve sealing.

[0048] It should also be noted that the diameters of the suction port and the exhaust port need to balance the suction efficiency and exhaust resistance. A diameter that is too small will limit the flow rate, while a diameter that is too large may cause sealing difficulties or smoke leakage. Optionally, if the volume of the simulation cavity is large, a larger first diameter may be required to increase the suction speed. For example, when the diameter of the suction port is 10mm, it is necessary to ensure that the smoke can be quickly inhaled under standard suction conditions, such as 35mL / 2s. The first diameter of the exhaust port can be the same as that of the suction port to ensure that the smoke can be discharged smoothly and reduce residue.

[0049] Gaskets are used to prevent smoke leakage by providing a tight seal.

[0050] The specifications of the gasket include a first size, a second size and a third size to accommodate cigarettes of different circumference sizes.

[0051] It should be noted that the gasket is used to contact and seal the inner wall of the cigarette opening in the simulated cavity. The first, second, and third dimensions refer to the diameter of the gasket's center hole, the diameter of its outer edge, or its axial thickness, representing different gasket specifications. The appropriate gasket specification can be determined based on the cigarette's circumference, while allowing for sufficient clearance for installation.

[0052] It should also be noted that the gasket uses the characteristic of its material that it is more likely to undergo plastic deformation under a compressive load to fill the tiny unevenness on the connection surface of the simulated cavity, thereby achieving sealing. During the cigarette combustion process, pressure will be generated in the simulated cavity. The gasket can withstand this pressure without deformation or rupture, thus maintaining the sealing. High temperatures are generated during the combustion of cigarettes. The material of the gasket needs to maintain physical and chemical stability at high temperatures to prevent leakage due to softening or failure of the material. In addition, the smoke may contain corrosive components, and the gasket material needs to have good corrosion resistance. For example, the gasket can be made of metal suitable for high-pressure and high-temperature environments, special high-temperature resistant rubber or plastic.

[0053] Specifically, the cavity subsystem 110 is designed to provide a sealed environment to contain the smoke generated during cigarette combustion. The cavity subsystem can effectively prevent interference from external air in a sealed environment, ensuring more accurate collection and analysis of cigarette smoke.

[0054] For example, see Figure 2 The cavity subsystem 110 may include a simulated cavity 1, a cavity support 2 for supporting the simulated cavity, a connecting pipe 3 for connecting to the suction subsystem, and a gasket 4 directly connected to the simulated cavity. Figure 2 The shape of the simulated cavity is similar to the structure of the human oral cavity, with both the top and bottom being arc-shaped. For example, the volume of the simulated cavity is about 56 ml, the material of the simulated cavity is PMMA material, and the width of the simulated cavity is 60 mm. The first diameter of the cigarette mouth, the suction port, and the exhaust port can be 10 mm. Cigarettes can include thin, medium, and thick cigarettes. The size of the gasket is determined according to the circumference of the cigarette, and the size of the gasket is directly proportional to the circumference of the cigarette. When the circumference of a thin cigarette is 17 mm, the specification of the first-sized gasket can correspond to an inner diameter of 6 mm and an outer diameter of 10 mm; when the circumference of a medium cigarette is 20 mm or 22 mm, the specification of the second-sized gasket can correspond to an inner diameter of 6 mm or 7 mm and an outer diameter of 10 mm; when the circumference of a thick cigarette is 24.2 mm, the specification of the third-sized gasket can correspond to an inner diameter of 8 mm and an outer diameter of 10 mm.

[0055] The suction subsystem 120 is connected to the cavity subsystem and is used to draw the smoke from the cavity subsystem in a first suction cycle after the cigarette has been burned for a first preset time.

[0056] Each first puff cycle consists of three parts: a first puff duration, a first rest duration, and a second puff duration.

[0057] It should be noted that the first preset duration refers to the period from when the cigarette is lit until combustion reaches a stable state. For example, the first preset duration could be 5 seconds. After a cigarette is lit, the initial combustion state may be unstable, and smoke composition may fluctuate due to factors such as incomplete combustion and temperature fluctuations. Setting the first preset duration ensures that the cigarette reaches a stable state, making the collected smoke composition more consistent and repeatable, thereby improving the accuracy of the experimental data.

[0058] It should also be noted that the first puff cycle refers to the complete puff and pause process of drawing smoke from the cavity subsystem, performed in a specific time sequence. The first puff cycle consists of three key components: the first puff duration, the first pause duration, and the second puff duration. The design of these three key components effectively controls the extraction and flow of smoke, ensuring the accuracy and representativeness of the data. The first puff duration refers to the duration of the first puff taken by the puff subsystem after the start of the first puff cycle. During the first puff duration, the puff subsystem draws smoke from the cavity subsystem, a period long enough to ensure effective collection of the smoke sample. For example, the first puff duration can be 2 seconds. The first pause duration refers to the period of time after the first puff ends, during which the system pauses. During the first pause duration, the puff subsystem does not draw smoke, allowing smoke to flow within the simulated cavity. For example, the first pause duration can range from 0 to 10 seconds. The second puff duration refers to the duration of the second puff taken after the first pause duration. During the second puff duration, the puff subsystem continues to draw smoke from the simulated chamber, typically to expel the smoke. This extended period ensures that all smoke drawn during the first puff duration is expelled, preparing for the next first puff cycle. For example, the second puff duration could be 50 seconds.

[0059] Optionally, the suction subsystem includes a suction pump, a first timer, a flow stabilizer, and a flow control meter.

[0060] The suction pump communicates with the first timer through the control system, is used to receive the first timer instruction, and perform the suction operation according to the duration based on the instruction control of the first timer.

[0061] The preset suction flow rate of the suction pump is within a first preset range.

[0062] It should be noted that a suction pump is a mechanical device used to extract gas or liquid, typically driven by an electric motor, and capable of generating negative pressure to draw fluid. In an embodiment of the present invention, the suction pump's primary function is to extract smoke from the simulation chamber for subsequent analysis and measurement. By adjusting the suction pump's operating state, the smoke flow rate and suction speed can be controlled to ensure effective sample collection under various experimental conditions. During the suction process, the suction pump maintains negative pressure within the simulation chamber, ensuring continuous flow of smoke and avoiding interference from external air. The first timer is a device used for time measurement and control, capable of tracking and managing time within a set time range. In an embodiment of the present invention, the first timer is primarily used to set and control the suction pump's operating cycle, including a first suction duration, a first stop duration, and a second suction duration. The first timer can send instructions to the control system. Upon receiving the instructions from the control system, the suction pump can ensure that the suction pump starts and stops within the correct time periods to achieve the predetermined first suction cycle.

[0063] It should also be noted that the suction pump and the first timer can communicate through the control system. The first timer sends instructions to the control system via digital or analog signals. These instructions can be to start, stop, or adjust the operating state of the suction pump. After receiving the instructions from the first timer, the control system can control the operation of the suction pump based on the instructions, such as starting, stopping, or adjusting suction. The first timer instructions are signals generated by the first timer and are used to control the operating state of the suction pump. First timer instructions can include start instructions, stop instructions, and adjustment instructions. The start instruction instructs the suction pump to start operation and enter the first or second suction duration; the stop instruction instructs the suction pump to stop operation and enter the first stop duration; and the adjustment instruction can be used to adjust parameters such as the suction duration and stop duration to meet requirements. The control process of the suction pump based on the first timer instructions is as follows: After receiving the start instruction from the first timer, the control system begins counting. Then, during the first suction duration, the suction pump starts and extracts smoke. Furthermore, during the first stop duration, the suction pump stops, allowing smoke to flow within the simulated chamber. Finally, during the second suction time, the suction pump is started again to continue to extract smoke until the end.

[0064] In an embodiment of the present invention, the preset suction flow rate refers to the ideal suction speed or flow rate set when designing or using the suction pump, usually expressed in volume units (such as liters / minute). The preset suction flow rate is a reference value of the suction pump under normal working conditions. The preset suction flow rate is related to the design and manufacturing parameters of the suction pump, the physical properties of the flue gas such as density and viscosity, and the design, length and diameter of the simulation cavity and the system connecting pipes. The first preset range refers to the allowable range of the suction flow rate set in the experiment. The setting of the first preset range can ensure that under different experimental conditions, the operation of the suction pump can be maintained in an effective working state, avoiding overload or underload, thereby ensuring the accuracy and reliability of the data.

[0065] The flow stabilizer is connected to the outlet end of the suction pump through a hard pipe in the cavity subsystem and is used to adjust the actual suction flow output by the suction pump.

[0066] Among them, the flow stabilizer is a device for regulating and controlling the flow of fluid, which can ensure that the fluid flows at a stable rate in the connecting pipeline. The flow stabilizer can eliminate flow fluctuations by adjusting the pressure and flow rate of the fluid, thereby providing a uniform and stable flow output. In an embodiment of the present invention, the flow stabilizer can adjust the flow output of the suction pump according to system requirements to ensure that a constant flow rate can be maintained under different working conditions. Through the regulating effect of the flow stabilizer, the flow fluctuations caused by changes in the working state of the suction pump can be reduced, and the stability of the system can be improved. By stabilizing the flow, the working efficiency of the suction subsystem can be improved, ensuring that the extraction and analysis process of the flue gas is smoother.

[0067] It should be noted that the actual suction flow output by the suction pump refers to the actual smoke flow rate extracted during the operation of the suction pump, which is usually expressed in volume units (such as liters / minute). The actual suction flow output by the suction pump may be affected by many factors. The flow stabilizer can adjust the actual suction flow output by the suction pump in a variety of ways. For example, the flow stabilizer is usually equipped with an adjustable valve, which can be opened or closed to change the channel area of ​​the fluid, thereby controlling the suction flow. The flow stabilizer equipped with a flow sensor can monitor flow changes in real time. When the actual flow is inconsistent with the set flow, the flow stabilizer will automatically adjust the valve opening so that the suction flow is within the first preset range. The flow stabilizer can also effectively control the flow by adjusting the pressure difference between the inlet and outlet. For example, when the flow is too large, the flow stabilizer can increase the outlet pressure to reduce the flow.

[0068] The flow control meter is connected to the outlet end of the flow stabilizer through the suction pipeline in the cavity subsystem. The flow control meter communicates with the suction pump through the control system. The flow control meter is used to measure the actual suction flow in real time and feed back the actual suction flow to the control system, so that the suction pump adjusts the flow based on the actual suction flow and the preset suction flow, so that the actual suction flow of the suction pump is within a first preset range; the flow control meter communicates with the flow stabilizer through the control system, and transmits the actual suction flow to the flow stabilizer based on the control system, so that the flow stabilizer is adjusted based on the actual suction flow.

[0069] Among them, the flow controller is a device for measuring fluid flow, usually used for gas or liquid flow monitoring. Different flow controllers can be constructed based on a variety of principles, such as turbine flowmeters, ultrasonic flowmeters or mass flowmeters. The flow controller can measure the actual suction flow in the suction subsystem in real time to facilitate monitoring the operating status of the system. The flow controller feeds back the measured actual flow data to the control system to help achieve dynamic adjustment of the flow. Furthermore, through connection with the control system, the flow controller can be used to automatically adjust the working state of the suction pump to ensure that the actual flow remains within the first preset range.

[0070] It should be noted that the flow controller is connected to the outlet of the flow stabilizer through a suction pipeline, and can accurately measure the flow after adjustment by the flow stabilizer, ensuring that the measured flow is the actual flow after processing by the flow stabilizer. In addition, by measuring the flow at the outlet of the flow stabilizer, the flow controller can obtain the flow data in a timely manner and feed it back to the control system for further adjustment and control. The flow controller communicates with the suction pump through the control system, and the flow controller sends the real-time measured flow data to the control system through a digital signal or an analog signal. The control system compares the received flow data with the flow value within the first preset range to decide whether it is necessary to adjust the working state of the suction pump. The control system will send an adjustment instruction to the suction pump to ensure that the actual suction flow of the suction pump can be adjusted in real time according to the feedback from the flow controller.

[0071] Specifically, after receiving the actual flow rate data, the control system compares it with the preset suction flow rate. If the actual suction flow rate is lower than the preset flow rate, the control system issues a command to the suction pump to increase the suction flow rate; if the actual suction flow rate is higher than the preset flow rate, the control system issues a command to decrease the suction flow rate. The suction pump adjusts its operating state according to the control system's command to achieve the required preset suction flow rate, ensuring that the actual suction flow rate is within the first preset range.

[0072] It's also important to note that the flow controller transmits the actual suction flow rate measured in real time to the flow stabilizer via the control system. Upon receiving the actual suction flow rate, the flow stabilizer analyzes whether it is within a preset range. If the actual suction flow rate is lower or higher than the preset range, the flow stabilizer makes appropriate adjustments. Based on the data provided by the flow controller, the flow stabilizer adjusts its valve opening or flow rate setting to ensure the desired flow rate remains.

[0073] Specifically, the flow controller plays a key monitoring and regulation role in the suction subsystem. By effectively communicating with the suction pump and flow stabilizer, it ensures the entire system operates stably within the preset range. This dynamic regulation mechanism not only improves system efficiency but also ensures data accuracy and reliability.

[0074] Optionally, the suction subsystem also includes: a filter, a solenoid valve and a second timer.

[0075] One end of the filter disc is connected to the inlet end of the flow controller through the suction pipeline in the cavity subsystem, and the other end of the filter disc is connected to the suction port through the suction pipeline in the cavity subsystem, so as to filter the smoke entering the flow controller.

[0076] Among them, the filter disc is a device used to separate and remove solid particles, impurities or other pollutants in the flue gas. The filter disc is usually made of a porous material, which can allow the flue gas to pass through, and the solid particles in the flue gas will be captured by the material of the filter disc when the flue gas passes through. By removing impurities and particles in the flue gas, it is ensured that the flue gas entering subsequent equipment (such as flow control meters) is relatively clean. Through filtering, the filter disc can protect sensitive equipment such as flow control meters to prevent them from being blocked or damaged by impurities and affecting their normal operation. In addition, clean flue gas helps to improve the measurement accuracy of the flow control meter and ensure that reliable data is obtained. For example, the filter disc can be a Cambridge filter disc.

[0077] It should be noted that the filter, as a device through which gas flows, is connected to the air inlet to ensure that the flue gas is first filtered by the filter before entering the flow controller. This ensures that all flue gas entering the flow controller is filtered by the filter, keeping the flue gas clean. The filter connection design also prevents backflow during shutdowns or flow changes, ensuring the normal operation of the system, thereby improving the accuracy and service life of the equipment.

[0078] The solenoid valve is connected to the exhaust port through the suction pipeline in the cavity subsystem. The solenoid valve communicates with the second timer through the control system, is used to receive the second timer instruction, and control its open or closed state based on the second timer instruction.

[0079] In at least one first suction cycle, the solenoid valve is in a closed state during a first suction duration and a first stop duration, and the solenoid valve is in an open state during a second suction duration.

[0080] A solenoid valve is an automated control device that utilizes electromagnetic principles to control fluid flow. It typically consists of a solenoid coil, a valve body, and a valve, enabling on / off control of liquids or gases. In embodiments of the present invention, the solenoid valve can rapidly open or close the exhaust port, thereby controlling the discharge of smoke. By controlling the solenoid valve's on / off state through electrical signals, the entire system can be automated, reducing manual intervention and improving efficiency and accuracy.

[0081] It should be noted that when the solenoid valve communicates with the second timer, the second timer sends a control signal to the solenoid valve through the control system, and the control system may use a specific communication protocol to ensure effective communication between the solenoid valve and the second timer, so that the solenoid valve can feed back its status (such as open or closed) to the control system for the second timer to monitor and adjust. The second timer instruction is a control signal generated by the second timer to indicate the operation of the solenoid valve. The second timer instruction may include an open instruction, a close instruction, and a timing adjustment instruction. The open instruction instructs the solenoid valve to open the exhaust port to allow smoke to be discharged; the close instruction instructs the solenoid valve to close the exhaust port to stop smoke from being discharged. The timing adjustment instruction may include setting a time delay or a specific time period to control the switching state of the solenoid valve at a specific moment.

[0082] It should also be noted that when the set time is reached, the second timer sends an open or close instruction to the control system. After receiving the instruction, the control system parses the instruction content and determines whether the state of the solenoid valve needs to be adjusted. When executing the operation, the control system can send a corresponding electrical signal to the solenoid valve. If an open instruction is received, the solenoid valve's solenoid coil is energized, causing the valve to open the exhaust port and allow smoke to escape. If a close instruction is received, the solenoid valve's solenoid coil is de-energized, causing the valve to close the exhaust port and prevent fluid from escaping. In addition, after executing the operation, the solenoid valve can feed back its status to the control system to ensure real-time monitoring and management of the system. The solenoid valve plays a vital role in the system. Through effective communication with the second timer, automated control of smoke can be achieved. By receiving and executing the instructions of the second timer, the solenoid valve can respond quickly and control the exhaust of smoke, thereby ensuring the safe and efficient operation of the system.

[0083] Specifically, the suction subsystem is connected to the cavity subsystem via a connecting pipe, and the various hardware devices in the suction subsystem are connected via connecting pipes or corresponding circuits. After the cigarette has been burned for a first preset time, the suction subsystem draws smoke from the cavity subsystem in a first puff cycle.

[0084] For example, see Figure 2 The suction subsystem 120 may include a suction pump 5, a first timer 6, a flow stabilizer 7, a flow control meter 8, a filter 9, a solenoid valve 10, and a second timer 11. Figure 2 The suction subsystem 120 is connected to the cavity subsystem. After the cigarette burns stably, smoke is drawn from the cavity subsystem multiple times in a first suction cycle.

[0085] The laser point light source and power meter probe corresponding to the cigarette smoke concentration characterization subsystem 130 are placed vertically relative to each other in front and behind the simulated cavity corresponding to the cavity subsystem, so as to detect the smoke concentration at the target position of the simulated cavity during the first puff duration and the first rest duration corresponding to at least one first puff cycle.

[0086] Among them, the laser point light source is a device that emits high-intensity, monochromatic light and can be used for precise measurement. The laser point light source has high directionality and coherence, can produce a very small light spot, and is suitable for various measurements. Due to the high directionality and high intensity of the laser, the laser point light source can achieve high-precision measurement of flue gas concentration. In an embodiment of the present invention, the laser point light source can be used to irradiate flue gas, and when the laser beam passes through the flue gas, the particles or molecules in the flue gas will scatter or absorb the beam. By analyzing the changes in the laser beam, the concentration of the flue gas can be inferred. The power meter probe is a device for measuring optical power and can be used in conjunction with the laser point light source. The power meter probe can monitor the power output of the laser beam emitted by the laser point light source in real time.

[0087] It's important to note that the laser point source and power meter probe are positioned perpendicularly to each other, front and back of the simulated cavity. This ensures that the laser beam emitted by the laser point source passes directly through the flue gas in the simulated cavity, creating a clear measurement path and reducing light scattering and interference. By placing the power meter probe behind the laser source, it maximizes the amount of laser beam passing through the flue gas, ensuring sufficient signal strength for measurement, thereby improving measurement accuracy and sensitivity.

[0088] It's also important to note that during the first puff duration, the pump draws smoke, rapidly updating the smoke composition within the simulated chamber and ensuring that valid concentration data is collected within a short period of time. During the first pause duration, the smoke's fluidity allows for even distribution within the simulated chamber, enabling concentration measurements during this period to reflect a more realistic smoke distribution rather than relying solely on instantaneous data from the puff.

[0089] Optionally, the cigarette smoke concentration characterization subsystem includes a laser point light source, a power meter probe, and a power display window.

[0090] The power display window is an interface or device used to display measurement results, typically connected to a power meter probe. This can be a physical display, such as an LCD or LED screen, or a software application running on a computer interface. The power display window displays real-time data on laser beam power or flue gas concentration as measured by the power meter probe, allowing operators to monitor measurement results at any time. Furthermore, through a graphical interface, the power display window facilitates analysis of data trends, facilitating further research or adjusting experimental parameters.

[0091] The laser point light source is used to emit a laser beam to a target position in the simulation cavity.

[0092] Among them, the laser beam is a beam with high coherence, monochromaticity and directionality emitted by a laser point light source. The target position refers to the target detection point or observation point of the laser beam in the simulation cavity. The choice of target position can be diverse depending on the position required for detection. When the structure of the simulation cavity is similar to the shape of the mouth, the target position can be determined according to different research positions. For example, if the upper membrane of the mouth (such as the upper palate) is being studied, the laser beam can be set at the upper position of the simulation cavity to measure the smoke concentration in that area. If the stimulation response of the tongue is being studied, the laser beam can be set at the bottom of the simulation cavity to measure the smoke concentration near the tongue. If the position close to the throat is being studied, the laser beam can be placed close to the suction port of the simulation cavity to measure the smoke concentration in that area. See Figure 3 , is a real-life image of the target position of the simulated cavity provided by an embodiment of the present invention, where the laser beam is a green beam. Figure 4 , which is a schematic diagram of the target position of the simulation cavity provided by an embodiment of the present invention. Figure 4 The green dot in the figure is the target position of the simulated cavity.

[0093] The power meter probe is used to collect power data of the laser beam after passing through the simulation cavity at a first frequency after the cigarette is burned for a first preset time.

[0094] The first frequency may refer to the frequency at which the power meter probe collects power data of the laser beam after it passes through the simulated cavity at regular intervals. The higher the first frequency, the more refined the collected power data, reflecting faster-changing signals. Power data refers to the power value of the laser beam after it passes through the simulated cavity, as measured by the power meter probe. Power data is typically expressed in watts or milliwatts.

[0095] It's important to note that the first frequency is typically controlled by the system's data acquisition unit or control system. The system sets the sampling frequency to ensure that changes in power data are effectively captured. Specifically, the performance of the power meter probe and data acquisition system determines the maximum sampling frequency. High-performance equipment can collect data at higher frequencies. The first frequency can also be adjusted based on specific measurement requirements.

[0096] The power display window communicates with the power meter probe and is used to present power data collected by the power meter probe.

[0097] It should be noted that after measuring the laser beam power, the power meter sensor outputs the result. Power meter sensors are typically equipped with a standard connection interface to facilitate connection to the power display window. Selecting the appropriate interface ensures stable and reliable data transmission. The power meter sensor transmits the measured optical power data to the power display window via the connection interface. After the power display window receives the data, the system processes and formats the data for easy understanding and use. This data processing and formatting may include unit conversion, data smoothing, and trend graph generation.

[0098] Specifically, the cigarette smoke concentration characterization subsystem includes a laser point light source, a power meter probe, and a power display window. Through these components, the subsystem measures smoke concentration at a target location within the simulated cavity during at least a first puff duration and a first rest duration, processes and formats the data, and displays it in real time.

[0099] For example, see Figure 2 The smoke concentration characterization subsystem 130 includes a laser point light source 12, a power meter probe 13, and a power display window 14. The relevant parameters of the laser point light source can be set according to needs. The output wavelength of the laser beam emitted by the laser point light source can be 520nm, the operating voltage of the laser point light source can be DC2.8-5.2V, the imaging of the emitted laser beam can be point-shaped, and the spot size can be adjusted. The power of the laser beam can be 5mW. Figure 2 , the laser point light source can be placed in front of the simulation cavity, about 25cm away from the simulation cavity. The relevant parameters of the power meter probe can be set according to needs. The power range that the power meter probe can detect can be 0.01~100mW, the effective aperture of the power meter probe can be 10mm, the time interval for power data collection can be 0.2s, and the wavelength range can be 400~1100nm. Figure 2 The power meter probe can be placed directly behind the simulation cavity and connected to the power display window to collect the power of the flue gas in real time.

[0100] The technical solution of the embodiment of the present disclosure is a detection system for determining the smoke concentration of cigarettes, and the detection system includes a cavity subsystem, a suction subsystem, and a cigarette smoke concentration characterization subsystem. The cavity subsystem is used to provide a closed environment for containing the smoke generated by the burning of cigarettes; the suction subsystem is connected to the cavity subsystem, and is used to extract smoke from the cavity subsystem in a first suction cycle after the cigarette has been burned for a first preset time; the laser point light source and power meter probe corresponding to the cigarette smoke concentration characterization subsystem are placed vertically relative to each other in front and behind the simulated cavity corresponding to the cavity subsystem, so as to detect the smoke concentration at the target position of the simulated cavity under the first suction time and the first stop time corresponding to at least one first suction cycle. This solves the problems in the prior art of using static measurement methods to detect smoke concentration, such as complex detection process operation, low efficiency, time lag, and difficulty in fully reflecting the smoking process of cigarettes. The embodiments of the present invention construct a detection system for determining cigarette smoke concentration, dynamically detect changes in cigarette smoke concentration during cigarette smoking in real time, improve the authenticity and accuracy of smoke concentration representation during cigarette smoking, and provide data support for digital sensory evaluation of smoke concentration during smoking.

[0101] Example 2

[0102] Figure 5 This is a flow chart of a method for determining cigarette smoke concentration provided by an embodiment of the present disclosure. Based on the aforementioned detection system, the following details how to detect cigarette smoke concentration using the detection system. This embodiment of the present disclosure is applicable to situations where the detection system for determining cigarette smoke concentration is used to determine cigarette smoke concentration. This method can be performed by the detection system for determining cigarette smoke concentration. Technical terms that are identical or corresponding to those in the aforementioned embodiments are not repeated here.

[0103] like Figure 5 As shown, the method includes:

[0104] S210 , controlling the suction pump to be in an on state, and adjusting the flow control meter to keep the actual suction flow rate within a first preset range.

[0105] Optionally, the timing parameters of the first timer and the second counter are set according to the first suction cycle, and the preset suction flow rate of the suction pump is set within a first preset range.

[0106] It should be noted that, based on the circumference of the cigarette, a gasket of suitable specifications can be determined and fixed, and the target position of the simulated cavity can be determined and marked.

[0107] Specifically, before turning on the suction pump, first ensure that the hardware and related piping in the detection system for determining cigarette smoke concentration are properly connected and free of leaks or faults. Then, determine the flow rate within the first preset range and record it for reference in subsequent operations. Set the timing parameters of the first timer and the second counter based on the first puff cycle. During the first and second puff durations, set the suction pump to the on state based on the first timer; during the first off state, set the suction pump to the off state based on the first timer; during the first and first off states, set the solenoid valve to the off state based on the second timer; during the second puff duration, set the solenoid valve to the open state based on the second timer. Determine and secure a gasket of appropriate specifications based on the circumference of the cigarette. Determine and mark the target location of the simulated cavity based on the location to be tested. Finally, turn on the power supply or start switch of the suction pump to initiate operation and generate negative pressure. After the suction pump is started, adjust the flow controller to ensure that the actual puff flow rate is within the first preset range.

[0108] S220, start the laser point light source, ensure that the spot position of the laser point light source on the simulation cavity is consistent with the target position, control the power meter probe to be perpendicular to the laser beam of the laser point light source, start the power meter probe and the power display window, collect and record the first power value.

[0109] After the laser point source and power meter probe are adjusted to optimal settings, begin recording the laser power value. The first power value refers to the stable power output value measured when the laser point source is adjusted and the power meter probe is perpendicular to the laser beam. It should be noted that the laser point source is moved to ensure that the laser spot is projected exactly at the target location.

[0110] Specifically, the relevant parameters of the laser point light source are set according to needs. The output wavelength of the laser beam emitted by the laser point light source, the operating voltage of the laser point light source, and the power of the laser beam can be set. Start the laser point light source device and ensure that it works properly. Then, according to the preset target position, move the laser point light source to ensure that the light spot generated by the laser point light source falls on the target position on the simulation cavity. Furthermore, adjust the power meter probe according to the position of the laser point light source so that the power meter probe is perpendicular to the laser beam of the laser point light source. The relevant parameters of the power meter probe can be set according to needs. The power range that the power meter probe can detect, the effective aperture of the power meter probe, the time interval for power data collection, and the wavelength range, etc. can be set. After adjustment, turn on the power meter probe and the power display window, and collect and record the first power value when the power output value stabilizes.

[0111] S230: After the cigarette has been burned for a first preset time, start a first timer and a second timer to collect a second power value in at least one first puff cycle.

[0112] The second power value is collected according to the first frequency during the first puffing duration and the first pause duration.

[0113] The second power value refers to the laser power value collected at the first acquisition frequency during at least one complete first puff cycle, including the first puff time and the first rest time, after the cigarette has burned for a first preset duration. The second power value is measured using a power meter probe and reflects the laser output power during and after the puff.

[0114] It should be noted that the start and end times of collecting the second power value can be manually controlled. If automatic recording is used, ensure that the power meter probe automatically collects data at the first puff time and the first stop time. The start and end times of collecting the second power value can also be precisely controlled using a first timer. When using the first timer to precisely control the collection of the second power value, connect the power meter probe's recording function to the first timer. When the first timer reaches the first puff time, the power meter probe automatically starts recording the power value. Similarly, when the first timer reaches the first stop time, the power meter probe stops recording.

[0115] Optionally, after completing the collection of the second power value under at least one first puff cycle, the puff pump, the laser point light source, the power meter probe and the power display window are sequentially turned off, the residual cigarette is removed, and the simulation cavity is cleaned.

[0116] Specifically, according to the functions of the first timer and the second timer, after the exhaust is completed, the system automatically starts timing and continues the next puff at the set time interval until the puff task is completed. The suction pump, laser point light source, power meter probe and power display window are turned off in sequence, the residual cigarette is taken out, and the simulation cavity is cleaned.

[0117] S240: Determine a cigarette smoke concentration representative value of the second power value based on the first power value and the second power value.

[0118] Among them, the representative value of cigarette smoke concentration can reflect the changing trend of cigarette smoke concentration.

[0119] Optionally, the representative value of cigarette smoke concentration is determined based on the following formula:

[0120]

[0121] Among them, N p is the cigarette smoke concentration; P0 is the first power value; PT is the second power value; K is the extinction coefficient, which is related to the type of cigarette; L0 is the distance traveled by the laser beam generated by the laser point light source; A p is the average projected area of ​​the particles, is the representative value of cigarette smoke concentration.

[0122] It should be noted that the formula for determining the representative value of cigarette smoke concentration can be derived based on the following process. Specifically, when a parallel monochromatic beam of light passes perpendicularly through a uniform, non-scattering, light-absorbing substance, its absorbance is directly proportional to the concentration of the light-absorbing substance and the thickness of the absorption layer, and inversely proportional to the transmittance. The formula is:

[0123] I T =I0 exp(-KL0N P A P );

[0124] Among them, I0 is the light intensity when there is no substance, that is, the light intensity corresponding to when there is no smoke. T It is the intensity of light after passing through the substance, that is, the corresponding light intensity after the presence of smoke. K is the extinction coefficient, that is, the degree of absorption and scattering of light by a medium or material when light passes through a certain medium or material, usually expressed in concentration per unit length (such as cm -1 ) represents. In the embodiment of the present invention, K is related to the type of cigarette, and different types of cigarettes correspond to fixed K values. In the embodiment of the present invention, L0 represents the width of the simulation cavity, and L0 is a constant value when the size of the simulation cavity is fixed. N P is the number of particles per unit volume, which is the concentration of cigarette smoke. P is the average projected area of ​​the particles, N P and A P The product of the two can represent the concentration of cigarette smoke.

[0125] According to I T =I0 exp(-KL0N P A P ), we can get It can be seen that under the conditions of extinction coefficient K and the distance L0 of the laser beam generated by the laser point light source, the concentration of cigarette smoke and the value Therefore, the concentration change pattern of the same cigarette during the smoking process can be directly detected by To reflect.

[0126] It should be noted that for I0 and I T , light intensity I and light radiation intensity I e The relationship is I=K λ I e .

[0127] Among them, Kλ is the optical efficiency, which is related to the wavelength λ. Since the wavelength of the laser beam in the experiment remains unchanged, K λ Is a constant. Radiation intensity I e The relationship between the radiation flux, that is, the optical power value P, is I e =P / Ω.

[0128] Wherein, Ω is the solid angle, which remains unchanged in the embodiment of the present invention. λ I e and I e =P / Ω, we can know Combine and It can be seen that That is, to obtain the change of cigarette smoke concentration, it is only necessary to determine the representative value of cigarette smoke With the changes. The larger the value, the greater the cigarette smoke concentration.

[0129] Optionally, after determining the representative value of cigarette smoke concentration, a curve showing the change of cigarette smoke concentration over time is obtained based on at least one representative value of cigarette smoke concentration in the first cycle.

[0130] The cigarette smoke concentration change curve is a curve formed by representative values ​​of cigarette smoke concentration under the first puff duration and the first rest duration.

[0131] Specifically, based on the first power value and the second power value, a representative value of the cigarette smoke concentration reflecting the trend of cigarette smoke concentration change can be obtained.

[0132] The technical solution of the embodiment of the present disclosure controls the suction pump to be in the on state, and adjusts the flow control meter to keep the actual suction flow rate within the first preset range. Then, start the laser point light source, ensure that the spot position of the laser point light source on the simulation cavity is consistent with the target position, control the power meter probe to be perpendicular to the laser beam of the laser point light source, start the power meter probe and the power display window, collect the first power value and record it. Furthermore, after the cigarette has been burned for a first preset period of time, start the first timer and the second timer, and collect the second power value under at least one first puff cycle. Finally, based on the first power value and the second power value, determine the representative value of the cigarette smoke concentration that reflects the trend of change in the cigarette smoke concentration. Through the first power value and the second power value, the trend of change in the cigarette smoke concentration can be effectively identified, the accuracy of the change in the cigarette smoke concentration can be improved, and reliable data support can be provided for the study of the smoke concentration in the cigarette combustion process, while providing a scientific basis for product development.

[0133] Example 3

[0134] As an optional embodiment of the above embodiment, this technical solution is introduced with three examples.

[0135] Set the first puff duration of the first and second timers to 2 seconds, the first pause duration to 10 seconds, and the second puff duration to 50 seconds. Set the preset suction flow rate of the suction pump to 1.00L / min-1.10L / min. Place cigarette products A, B, and C in the constructed experimental setup. Select gaskets of appropriate specifications based on the circumference of the cigarette products and secure them horizontally in the simulated cavity. Figure 4 ,The green dot is the target position marked on the simulation cavity.

[0136] Turn on the suction pump and adjust the flow controller so that the actual suction flow is 1.05L / min.

[0137] Turn on the laser point light source and adjust the laser point light source according to the target position so that the spot position of the laser point light source on the simulation cavity is consistent with the target position. Figure 4 Adjust the power meter probe so that it is perpendicular to the laser beam of the laser point light source. Then open the power meter probe and power display window, and start collecting and recording the first power value when there is no smoke at the target position.

[0138] After lighting the cigarette and waiting for 5 seconds until combustion stabilizes, the first and second timers are activated, and the cigarette is puffed for a specified period of time. The second power value is collected during at least one first puff cycle. After puffing ceases, the second power value is continuously collected at the first frequency for the first puff duration.

[0139] After the suction pump completes the exhaust operation according to the specified time and program, it will automatically perform suction on the 2nd, 3rd and 4th ports.

[0140] After smoking cigarette A, the pump, laser light source, power meter probe, and power display window were turned off in sequence. The remaining cigarette butt was removed and the simulation chamber was cleaned. A new cigarette was then installed and the above steps were repeated, performing dynamic smoke concentration testing on cigarettes B and C in turn.

[0141] In the first example, the cigarette is product A, the circumference of product A is 24.2 mm, the total length of the cigarette is 84 mm, and the length of the cigarette is 59 mm. Based on the first power value and the second power value, the representative value of the smoke concentration of product A in the first cycle is calculated. Figure 6 Based on the representative value of the smoke concentration of cigarette product A, a curve showing the change of the smoke concentration of cigarette product A over time can be obtained.

[0142] See also Figure 6, at the target position, within 2s of suction, The value of is gradually increasing, and reaches a maximum value of 0.68 at 2s, indicating that the smoke concentration is increasing. The value of begins to decrease at a certain rate and tends to be stable after 6 seconds, indicating that the smoke concentration first decreases and then tends to be constant. This may be because the large-sized aerosol particles in the smoke begin to settle after the end of inhalation, and then the smoke concentration tends to be constant due to the slow sedimentation of small-sized particles.

[0143] In the second example, the cigarette is product B, the circumference of product B is 22mm, the total length of the cigarette is 84mm, and the length of the cigarette is 54mm. Based on the first power value and the second power value, the representative value of the smoke concentration of product B in the first cycle is calculated. Figure 7 Based on the representative value of the smoke concentration of cigarette product B, a curve showing the change of the smoke concentration of cigarette product B over time can be obtained.

[0144] See also Figure 7 From the concentration change results of cigarette B, within 2 seconds of smoking, The value of gradually increases and reaches a maximum value of 1.14 at 2s, indicating that the smoke concentration increases as the smoking process proceeds, and the smoke concentration formed is greater than that of cigarette product A. The value fluctuates around 1.14, indicating that the smoke concentration changes tend to be stable at this time, and the balance between the floating and settling speeds of aerosol particles is achieved, making the smoke concentration tend to remain unchanged.

[0145] In the third example, the cigarette is product C, the circumference of product C is 17 mm, the total length of the cigarette is 97 mm, and the length of the cigarette is 67 mm. Based on the first power value and the second power value, the representative value of the smoke concentration of product C in the first cycle is calculated. Figure 8 , based on the representative value of the smoke concentration of the C cigarette product, a curve of the change of the smoke concentration of the C cigarette product over time can be obtained.

[0146] See also Figure 8 For cigarette product C, just like cigarette product A, within the 2 seconds of smoking, The value of gradually increases and reaches a maximum value of 1.53 at 2s, indicating that the smoke concentration is also increasing during smoking, and is greater than the smoke concentration formed by cigarette products A and B. After smoking for 2s, The value of continues to increase at a certain rate and stabilizes after 4s, indicating that the smoke concentration increases first.

[0147] This may be because the smoke after puffing moves toward the detection site, thereby increasing the smoke concentration at that location, indicating that the smoke of this cigarette has a stronger lateral diffusion ability.

[0148] The technical solution of the disclosed embodiments accurately derives representative smoke concentration values ​​for each cigarette product through calculation of the first and second power values. By analyzing the smoke concentration curve over time, the smoke concentration trends of different cigarette products during the puffing process can be clearly observed. This dynamic monitoring can reveal the characteristics of cigarette combustion and smoke diffusion. By analyzing the smoke concentration characteristics of different cigarette products, cigarette design and production processes can be optimized based on the characteristics of smoke concentration changes, thereby reducing harmful emissions and improving product safety and user experience.

[0149] Example 4

[0150] Figure 9 This is a schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure. Figure 9 , which shows an electronic device (eg Figure 9 The terminal device in the embodiments of the present disclosure may include, but is not limited to, a mobile terminal such as a mobile phone, a laptop computer, a digital broadcast receiver, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), an in-vehicle terminal (such as an in-vehicle navigation terminal), and the like. Figure 9 The electronic device shown is only an example and should not limit the functions and scope of use of the embodiments of the present disclosure.

[0151] like Figure 9 As shown, the electronic device 500 may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 501, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 502 or a program loaded from a storage device 508 into a random access memory (RAM) 503. Various programs and data required for the operation of the electronic device 500 are also stored in the RAM 503. The processing device 501, the ROM 502, and the RAM 503 are connected to each other via a bus 504. An edit / output (I / O) interface 505 is also connected to the bus 504.

[0152] Typically, the following devices may be connected to the I / O interface 505: an input device 506 including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 507 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 508 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 509. The communication device 509 may allow the electronic device 500 to communicate with other devices wirelessly or by wire to exchange data. Although Figure 9 The electronic device 500 is shown with various devices, but it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed instead.

[0153] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a non-transitory computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 509, or installed from the storage device 508, or installed from the ROM 502. When the computer program is executed by the processing device 501, the above-mentioned functions defined in the method of the embodiment of the present disclosure are performed.

[0154] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0155] The electronic device provided in the embodiment of the present disclosure and the detection method for determining cigarette smoke concentration provided in the above embodiment belong to the same inventive concept. For technical details not fully described in this embodiment, please refer to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0156] Example 5

[0157] An embodiment of the present disclosure provides a computer storage medium having a computer program stored thereon. When the program is executed by a processor, the detection method for determining the cigarette smoke concentration provided in the above embodiment is implemented.

[0158] It should be noted that the computer-readable medium mentioned above in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, device, or component. In the present disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. Such a propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to wires, optical cables, RF (radio frequency), etc., or any suitable combination thereof.

[0159] In some embodiments, the server can communicate using any currently known or later developed network protocol, such as HTTP (HyperText Transfer Protocol), and can be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or later developed network.

[0160] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0161] The computer-readable medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device:

[0162] Controlling the suction pump to be in an on state, and adjusting the flow control meter so that the actual suction flow rate remains within a first preset range;

[0163] Starting the laser point light source, ensuring that the spot position of the laser point light source on the simulation cavity is consistent with the target position, controlling the power meter probe to be perpendicular to the laser beam of the laser point light source, starting the power meter probe and the power display window, collecting and recording a first power value;

[0164] After the cigarette has been burned for a first preset time, the first timer and the second timer are started to collect a second power value during at least one first puff cycle; wherein the second power value is collected according to the first frequency during the first puff time and the first rest time;

[0165] A representative value of cigarette smoke concentration is determined based on the first power value and the second power value; wherein the representative value of cigarette smoke concentration reflects a trend of change in cigarette smoke concentration.

[0166] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages, or a combination thereof, including, but not limited to, object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0167] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the module, program segment, or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of the boxes in the block diagram and / or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0168] The units involved in the embodiments described in this disclosure may be implemented in software or hardware, wherein the name of a unit does not necessarily limit the unit itself.

[0169] The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, and without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chip (SOCs), complex programmable logic devices (CPLDs), and the like.

[0170] In the context of the present disclosure, a machine-readable medium can be a tangible medium that can contain or store a program for use by or in conjunction with an instruction execution system, device or equipment. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium can include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0171] The above description is merely a preferred embodiment of the present disclosure and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also includes other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the above-mentioned disclosed concepts. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this disclosure.

[0172] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details have been included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0173] Although the subject matter has been described in language specific to structural features and / or methodological logical acts, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely example forms of implementing the claims.

Claims

1. A detection system for determining cigarette smoke concentration, characterized in that: include: Cavity subsystem, suction subsystem and cigarette smoke concentration characterization subsystem; among them, The cavity subsystem is used to provide a closed environment for containing smoke generated by burning cigarettes; The suction subsystem is connected to the cavity subsystem and is used to draw the smoke from the cavity subsystem in a first puff cycle after the cigarette has been burned for a first preset time; wherein each first puff cycle consists of three parts: a first puff duration, a first rest duration, and a second puff duration; The laser point light source and power meter probe corresponding to the cigarette smoke concentration characterization subsystem are placed vertically relative to each other in front and behind the simulated cavity corresponding to the cavity subsystem, so as to detect the smoke concentration at the target position of the simulated cavity under the first puff duration and the first rest duration corresponding to at least one of the first puff cycles.

2. The detection system for determining cigarette smoke concentration according to claim 1, characterized in that: The cavity subsystem includes a simulated cavity, a cavity support supporting the simulated cavity, a connecting pipeline connected to the suction subsystem, and a gasket directly connected to the simulated cavity; wherein the connecting pipeline includes a suction pipeline or a hard pipeline; The simulation cavity is used to accommodate and fix the cigarette and collect smoke generated during the combustion process of the cigarette; The gasket is used to prevent smoke leakage by providing airtightness; wherein, the specifications of the gasket include a first size, a second size and a third size, so as to adapt to cigarettes of different circumference sizes.

3. The detection system for determining cigarette smoke concentration according to claim 2, characterized in that: The simulation cavity includes at least one cigarette opening, at least one suction opening, and at least one exhaust opening; Among them, at least one cigarette opening with a first diameter is opened on the side of the simulation cavity connected to the cigarette, and the cigarette opening is used to install gaskets of different specifications; at least one suction opening and at least one exhaust opening with a first diameter are respectively opened on the two bottom surfaces of the simulation cavity connected to the suction subsystem, and the suction opening is used to inhale the smoke in the simulation cavity, and the exhaust opening is used to discharge the smoke out of the simulation cavity.

4. The detection system for determining cigarette smoke concentration according to claim 1, characterized in that: The suction subsystem includes a suction pump, a first timer, a flow stabilizer, and a flow control meter; The suction pump communicates with the first timer via a control system, is configured to receive an instruction from the first timer, and control the suction operation to be performed according to a duration based on the instruction from the first timer; wherein a preset suction flow rate of the suction pump is within a first preset range; The flow stabilizer is connected to the outlet end of the suction pump through a hard pipe in the cavity subsystem and is used to adjust the actual suction flow output by the suction pump; The flow control meter is connected to the outlet end of the flow stabilizer through the suction pipeline in the cavity subsystem, and the flow control meter communicates with the suction pump through the control system. The flow control meter is used to measure the actual suction flow in real time and feed back the actual suction flow to the control system, so that the suction pump adjusts the flow based on the actual suction flow and the preset suction flow, so that the actual suction flow of the suction pump is within a first preset range; the flow control meter communicates with the flow stabilizer through the control system, and transmits the actual suction flow to the flow stabilizer based on the control system, so that the flow stabilizer is adjusted based on the actual suction flow.

5. The detection system for determining cigarette smoke concentration according to claim 4, characterized in that: The suction subsystem further includes: a filter, a solenoid valve, and a second timer; One end of the filter is connected to the inlet of the flow controller via the suction pipeline in the cavity subsystem, and the other end of the filter is connected to the suction port via the suction pipeline in the cavity subsystem, for filtering the smoke entering the flow controller; The solenoid valve is connected to the exhaust port through the suction pipeline in the cavity subsystem, and the solenoid valve communicates with the second timer through a control system, and is used to receive the second timer instruction and control its open or closed state based on the second timer instruction; wherein, in at least one first suction cycle, the solenoid valve is in a closed state during the first suction duration and the first stop duration, and the solenoid valve is in an open state during the second suction duration.

6. The detection system for determining cigarette smoke concentration according to claim 1, characterized in that: The cigarette smoke concentration characterization subsystem includes a laser point light source, a power meter probe and a power display window; The laser point light source is used to emit a laser beam to a target position in the simulation cavity; The power meter probe is used to collect power data of the laser beam after passing through the simulation cavity at a first frequency after the cigarette has been burned for a first preset time period; The power display window is in communication with the power meter probe and is used to present the power data collected by the power meter probe.

7. A method for determining cigarette smoke concentration, comprising the detection system for determining cigarette smoke concentration according to claims 1 to 6, characterized in that: The method comprises: Controlling the suction pump to be in an on state, and adjusting the flow control meter so that the actual suction flow rate remains within a first preset range; Starting the laser point light source, ensuring that the spot position of the laser point light source on the simulation cavity is consistent with the target position, controlling the power meter probe to be perpendicular to the laser beam of the laser point light source, starting the power meter probe and the power display window, collecting and recording a first power value; After the cigarette has been burned for a first preset time, the first timer and the second timer are started to collect a second power value during at least one first puff cycle; wherein the second power value is collected according to the first frequency during the first puff time and the first rest time; A representative value of cigarette smoke concentration is determined based on the first power value and the second power value; wherein the representative value of cigarette smoke concentration reflects a trend of change in cigarette smoke concentration.

8. The method according to claim 7, characterized in that Before turning on the suction pump, the method further comprises: The timing parameters of the first timer and the second counter are set according to the first suction cycle, and the preset suction flow rate of the suction pump is set within a first preset range.

9. The method according to claim 7, characterized in that The step of determining the cigarette smoke concentration representative values ​​of the second power value according to the first power value and the second power value includes: The representative value of the cigarette smoke concentration is determined based on the following formula: Among them, N p is the cigarette smoke concentration; P0 is the first power value; P T is the second power value; K is the extinction coefficient, which is related to the type of cigarette; L0 is the distance traveled by the laser beam generated by the laser point light source; A p is the average projected area of ​​the particles, is the representative value of cigarette smoke concentration.

10. The method according to claim 9, characterized in that After determining the representative value of cigarette smoke concentration, the method further includes: A curve showing the change of cigarette smoke concentration over time is obtained based on the representative value of cigarette smoke concentration in at least one first cycle; wherein the cigarette smoke concentration change curve is a curve formed by the representative values ​​of cigarette smoke concentration in the first puff duration and the first rest duration.

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