CN114113053A - Cigarette tobacco section oxygen content detection device and detection method thereof - Google Patents
Cigarette tobacco section oxygen content detection device and detection method thereof Download PDFInfo
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- CN114113053A CN114113053A CN202010895842.3A CN202010895842A CN114113053A CN 114113053 A CN114113053 A CN 114113053A CN 202010895842 A CN202010895842 A CN 202010895842A CN 114113053 A CN114113053 A CN 114113053A
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 158
- 239000001301 oxygen Substances 0.000 title claims abstract description 158
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 158
- 235000019504 cigarettes Nutrition 0.000 title claims abstract description 86
- 238000001514 detection method Methods 0.000 title claims abstract description 80
- 241000208125 Nicotiana Species 0.000 title claims abstract description 78
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 78
- 230000000391 smoking effect Effects 0.000 claims abstract description 81
- 238000007789 sealing Methods 0.000 claims abstract description 73
- 238000012545 processing Methods 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 31
- 239000007789 gas Substances 0.000 claims description 19
- 238000005086 pumping Methods 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 12
- 230000037431 insertion Effects 0.000 claims description 12
- 239000000779 smoke Substances 0.000 claims description 12
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 8
- 239000004800 polyvinyl chloride Substances 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 239000007850 fluorescent dye Substances 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 claims description 6
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- NTVIYASUTONQEE-UHFFFAOYSA-N C(CCC)C=1C=C2C=CC3=CC(=CC4=CC=C(C1)C2=C43)CCCC Chemical compound C(CCC)C=1C=C2C=CC3=CC(=CC4=CC=C(C1)C2=C43)CCCC NTVIYASUTONQEE-UHFFFAOYSA-N 0.000 claims description 3
- 229920002943 EPDM rubber Polymers 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 229920006311 Urethane elastomer Polymers 0.000 claims description 3
- 238000011088 calibration curve Methods 0.000 claims description 3
- 229920002301 cellulose acetate Polymers 0.000 claims description 3
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 claims description 3
- 229910000457 iridium oxide Inorganic materials 0.000 claims description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000002775 capsule Substances 0.000 claims 3
- 235000019505 tobacco product Nutrition 0.000 description 8
- 239000000523 sample Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
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- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/775—Indicator and selective membrane
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
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Abstract
The invention provides a device and a method for detecting the oxygen content of a cigarette tobacco section. The first and second sealing members are located on opposite end faces of the sealed cavity during testing, respectively, and a cigarette passes through the first and second sealing members during testing to seal the tobacco section within the heated cavity and to seal a portion of the hollow section and the filter section within the sealed cavity. The end of the filter segment is inserted into the smoking machine and connected to the air chamber. One of the two oxygen concentration measuring devices is arranged in the sealed cavity, the other is arranged in the air chamber and is connected to the processing system so as to receive the detected oxygen concentration and obtain the oxygen content of the tobacco section. The detection device and the detection method are simple to operate and high in accuracy, and the mouth-to-mouth oxygen content of the tobacco section of the heated cigarette in a smoking state can be rapidly obtained.
Description
Technical Field
The invention relates to the field of tobacco product detection, in particular to a device and a method for detecting the oxygen content of a cigarette tobacco section.
Background
The cigarette can produce thousands of chemical substances in the burning and smoking process, wherein part of smoke components have great harm to human health and can cause various diseases. The diversification development of the tobacco products provides a great opportunity for heating novel tobacco products which do not burn. The heating temperature applied to heat the cigarette without burning is generally low, so that the types and the release amount of harmful ingredients are obviously reduced. On one hand, the harm of the cigarettes to human bodies is reduced, and on the other hand, the requirements of smoking people on the cigarettes are met, so that the cigarettes are attracted by consumers and the attention of enterprises. At present, great companies increase the research and development efforts on novel cigarette smoking sets, but in order to ensure that tobacco is not combusted, the applied heating temperature is generally lower and does not exceed 300 ℃, so that the defects that tobacco products which are not combusted by heating generally have low smoke satisfaction and the like are caused. The Chinese patent application (application number is 201911174480.2) provides a closed heating non-combustion cigarette, which adopts a closed smoking set, and the content of oxygen in the cigarette is reduced and the heating temperature of the smoking set is properly increased, so that more smoke components are thermally liberated from the tobacco, and the condition that the satisfaction of the novel heating non-combustion cigarette product is not strong is improved. Therefore, the change of the oxygen content of the tobacco section of the novel heating non-combustion tobacco product in the smoking process has important influence on solving the problem of poor satisfaction of the smoke of the heating non-combustion tobacco product. Therefore, there is a need for an apparatus and method for obtaining the puff-by-puff oxygen content of tobacco segments by directly detecting the oxygen content.
Disclosure of Invention
In order to solve the problems, the invention provides a device for detecting the oxygen content of a cigarette tobacco section and a method for detecting the oxygen content of the cigarette tobacco section by using the device, wherein the device and the method are simple to operate, have high accuracy and are suitable for novel tobacco products of various specifications, and the gradual oxygen content of the tobacco section of a heated cigarette in a smoking state can be quickly obtained. In addition, the detection device and the detection method have the advantages of strong anti-interference capability, small error and good stability.
According to one aspect of the invention, a cigarette tobacco section oxygen content detection device is provided, the cigarette comprises a tobacco section, a hollow section and a filter tip section which are sequentially connected, the cigarette tobacco section oxygen content detection device comprises a heating cavity, a sealing cavity, a first sealing part, a second sealing part, two oxygen concentration measurement devices, a smoking machine, an air chamber and a processing system, wherein: the first sealing part is detachably arranged on two end faces of the heating cavity and the sealing cavity which are adjacent to each other, the first sealing part and the second sealing part are detachably arranged on two opposite end faces of the sealing cavity respectively during detection, and the cigarette passes through the first sealing part and the second sealing part during detection so as to seal the tobacco section in the heating cavity and seal a part of the hollow section and the filter section in the sealing cavity; the end of the filter tip section outside the sealed cavity is inserted into a smoking machine, and the smoking machine is connected to the air chamber to capture the drawn smoke into the air chamber; and one of the two oxygen concentration measuring devices is arranged in the sealed cavity, the other is arranged in the air chamber, and each of the two oxygen concentration measuring devices is connected to a processing system which is used for receiving the oxygen concentration detected by the two oxygen concentration measuring devices and obtaining the oxygen content of the tobacco section by processing the oxygen concentration.
Further, the sealed housing may further include an air inlet, a sealing cover for closing the air inlet, and a first hollow section insertion hole and a second hollow section insertion hole formed on opposite end surfaces, respectively, wherein the first hollow section insertion hole is for inserting the first sealing member, and the second hollow section insertion hole is for inserting the second sealing member.
Alternatively, the sealed cavity may have a volume between 50 mL-10L.
According to one embodiment, each of the first and second sealing members may be a sealing ring.
Further, the sealing ring may have a thickness of between 0.5mm-10 mm.
Further, the sealing ring may have a width of between 1mm-10 mm.
Alternatively, the first and second sealing members may be made of epoxy, polyvinyl chloride, ethylene propylene diene monomer, silicone, thermoplastic elastomer (TPE), neoprene, or urethane rubber.
According to another embodiment, the two oxygen concentration measuring devices may comprise a miniature probe-type oxygen sensor.
Further, the micro probe-type oxygen sensor may be a solid-state sensor.
In addition, the solid-state sensor may have a gas sensor.
Alternatively, the gas sensor may be made of a semiconductor material, a semiconductor composite material, a composite material of zinc oxide, iridium oxide, and fiber oxide.
Alternatively, the gas sensor can have a size between 0.1nm-1 mm.
According to yet another embodiment, the micro-probe oxygen sensor may be a fiber optic oxygen sensor.
Further, the fiber optic oxygen sensor may include a sensing film formed from a matrix material and a fluorescent dye indicator.
Alternatively, the matrix material may comprise one or more of polymethylmethacrylate, polytetrafluoroethylene, cellulose acetate, polyvinyl chloride, polystyrene, or room temperature vulcanized silicone rubber.
Alternatively, the fluorescent dye indicator may comprise one or more of dibutyl pyrene or ru (ii) bidentate complexes.
According to another embodiment, the two oxygen concentration measuring devices may comprise chromatographic-type or spectroscopic-type measuring devices.
According to an exemplary embodiment, the processing system may further comprise: a detection circuit connected to each of the two oxygen concentration measuring devices, respectively, to receive the detected oxygen concentration; and the data acquisition system is connected to the detection circuit to acquire and process the oxygen concentration.
According to another aspect of the present invention, there is provided a method for detecting oxygen content of a tobacco section of a cigarette by using the above apparatus for detecting oxygen content of a tobacco section of a cigarette, comprising the following steps:
inserting the cigarette to be tested into the heating cavity and the sealed cavity through the first sealing part and the second sealing part, so that the tobacco section is sealed in the heating cavity and part of the hollow section and the filter section are sealed in the sealed cavity, and at the moment, the air inlet of the sealed cavity is communicated with the atmosphere;
inserting the end part of the filter tip section into a smoking machine, and checking the sealing state of the oxygen content detection device of the cigarette tobacco section;
selecting a smoking mode of the smoking machine;
detecting the oxygen concentration in the sealed cavity and the air chamber before the smoking machine sucks through two oxygen concentration measuring devices, and sending the oxygen concentration to a processing system;
sealing the air inlet through a sealing cover and starting a smoking machine for smoking;
after the smoking is finished, waiting for the stability of a sealed cavity detection signal and an air chamber detection signal received by a processing system, and processing the sealed cavity detection signal and the air chamber detection signal to respectively obtain the oxygen concentration of the sealed cavity and the oxygen concentration of the air chamber after smoking in the smoking machine; and
calculating, by the processing system, an oxygen content of the tobacco segment of the cigarette according to the following formula:
X＝(C2-C02)*V2-(C01-C1)*V
wherein X is the oxygen content (mL) of the tobacco segment during smoking; c1The concentration (%) of oxygen in the sealed cavity after the smoking machine sucks the smoke; c2The oxygen concentration (%) of the air chamber after the smoking machine sucks the air is obtained; c01The oxygen concentration (%) in the air chamber before the smoking machine sucks the smoke; c02The oxygen concentration (%) in the sealed cavity before the smoking machine sucks the smoke is obtained; v2Is the volume of the sealed cavity; v1Is the volume of the air chamber.
According to one embodiment, the step of processing the sealed cavity detection signal and the air chamber detection signal comprises converting the sealed cavity detection signal and the air chamber detection signal into the oxygen concentration of the sealed cavity and the air chamber after being pumped by the smoking machine according to a calibration curve.
According to another embodiment, the step of waiting for the stabilization of the detection signal of the sealed cavity and the detection signal of the air chamber received by the processing system after the pumping is finished comprises opening the sealing cover after pumping a plurality of openings according to the volumes of the sealed cavity and the air chamber, and closing the sealing cover for detection after the readings of the two oxygen concentration measuring devices are stabilized.
Preferably, the cigarettes may be equilibrated for 48 hours at a temperature of 22 ± 2 ℃ and a relative humidity of 60 ± 5% before being tested, and cigarettes having an average mass difference within a range of 5mg are selected for testing.
Alternatively, the pumping mode may include an I SO pumping mode or an HCI pumping mode.
Drawings
The above and other aspects and features of the present invention will become apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of a device for detecting oxygen content in a tobacco segment of a cigarette according to an embodiment of the invention; and
fig. 2 is a schematic structural view of a sealed chamber according to an embodiment of the present invention.
Detailed Description
Illustrative, non-limiting embodiments of the present invention are described in detail below with reference to the accompanying drawings, which further illustrate the apparatus and method for detecting oxygen content in a tobacco segment of a cigarette according to the present invention.
The oxygen content detection device for the tobacco section of the cigarette is used for detecting the mouth-to-mouth oxygen content of the tobacco section of the heated cigarette in a smoking state, and comprises a heating cavity 1, a sealing cavity 2, a first sealing part 3, a second sealing part 4, two oxygen concentration measuring devices 5, a smoking machine 6, an air chamber 7 and a processing system, wherein the processing system is shown in figure 1. The cigarette to be tested generally comprises successively adjacent tobacco segments 8, hollow segments 9 and filter segments 10. For example, the heating chamber 1 may adopt one or more of circumferential heating, needle heating and electromagnetic heating.
Specifically, the heating chamber 1 and the sealed chamber 2 are disposed adjacently, and the first sealing member 3 is detachably provided on both end faces of the heating chamber 1 and the sealed chamber 2 adjacent to each other, as shown in fig. 1. In addition, the first seal member 3 and the second seal member 4 are detachably located on the opposite end faces of the sealed housing 2, respectively, during the inspection. The arrangement is such that when a cigarette passes through the first and second sealing members 3, 4 during testing, the tobacco section 8 is sealed within the heating cavity 1 so as to be heated and seal the hollow section 9 and a portion of the filter section 10 within the sealed cavity 2, thereby constituting a closed testing arrangement. A portion of the filter segment 10 is located outside the sealed housing 2 and the end of the filter segment outside the sealed housing is inserted into a smoking machine 6, the smoking machine 6 then being connected to the air chamber 7 to trap the drawn smoke within the air chamber.
Two oxygen concentration measuring devices 5 are provided one inside the sealed chamber 2 and the other inside the gas chamber 7 for monitoring the oxygen concentration in real time, and each oxygen concentration measuring device 5 is connected to a processing system. The processing system is used for receiving the oxygen concentrations detected by the two oxygen concentration measuring devices and obtaining the oxygen content of the tobacco section by processing the oxygen concentrations. According to an exemplary embodiment, the processing system may further comprise a detection circuit 11 and a data acquisition system 12. A detection circuit 11 is connected to each of the two oxygen concentration measuring devices 5 to receive the detected oxygen concentration in the sealed chamber 2 and the gas chamber 7, for example, the detection circuit may be connected to the oxygen concentration measuring devices 5 through an optical fiber 13. The data acquisition system 12 is connected to the detection circuit 11 to perform data acquisition and processing on the oxygen concentration received by the detection circuit, so as to obtain the oxygen content of the tobacco segment. The device for detecting the oxygen content of the cigarette tobacco section is easy to operate, can quickly obtain a detection structure, has strong anti-interference capability, small error and good stability, and can be used for detecting novel tobacco products with various specifications.
According to an embodiment of the present invention, the sealed housing 2 may further include an air inlet 21, a sealing cover 22 for closing the air inlet 21, and a first hollow section insertion hole 23 and a second hollow section insertion hole 24 respectively formed on opposite end surfaces. The first hollow section insertion hole 23 is for inserting the first seal member 3, and the second hollow section insertion hole 24 is for inserting the second seal member 24. Preferably, the sealed housing 2 may have a volume of between 50 mL-10L.
Preferably, each of the first and second seal members 3 and 4 may be a seal ring. For example, the sealing ring may have a thickness of between 0.5mm-10 mm. In addition, the sealing ring may, for example, have a width of between 1mm and 10 mm. According to an example, the first sealing member 3 and the second sealing member 4 may be made of epoxy, polyvinyl chloride, ethylene propylene diene monomer, silicone, thermoplastic elastomer (TPE), neoprene, urethane rubber, or other organic polymer rubber.
According to an alternative embodiment of the present invention, the two oxygen concentration measuring devices 5 may comprise a miniature probe-type oxygen sensor. Further, according to an example, the micro probe-type oxygen sensor may be a solid state sensor. The solid-state sensor can have a gas sensor, for example. Alternatively, the gas sensor may be made of a semiconductor material, a semiconductor composite material, a metal oxide material such as zinc oxide or iridium oxide, and a composite material of an optical fiber oxide. Preferably, the gas sensor may have a size between 0.1nm and 1 mm. According to another example, the micro-probe oxygen sensor may be a fiber optic oxygen sensor. The fiber optic oxygen sensor may include a sensing membrane formed from a matrix material and a fluorescent dye indicator. Optionally, the matrix material comprises one or more of polymethylmethacrylate, polytetrafluoroethylene, cellulose acetate, polyvinyl chloride, polystyrene, or room temperature vulcanized silicone rubber. The fluorescent dye indicator may include one or more of dibutyl pyrene or ru (i) bidentate complexes. The oxygen concentration measuring device may be a chromatograph or other spectral measuring device.
The method for detecting the oxygen content of the tobacco section of the cigarette according to the invention is described below, and the method uses the above-mentioned device for detecting the oxygen content of the tobacco section of the cigarette to detect the oxygen content of the tobacco section of the cigarette in a smoking process one by one. Specifically, the method for detecting the oxygen content of the tobacco section of the cigarette can comprise the following steps:
inserting the cigarette to be tested into the heating cavity 1 and the sealed cavity 2 through the first sealing part 3 and the second sealing part 4, so that the tobacco section 8 is sealed in the heating cavity 1 and part of the hollow section 9 and the filter tip section 10 are sealed in the sealed cavity 2, and the air inlet 21 of the sealed cavity 2 is communicated with the atmosphere;
inserting the end part of the filter tip section 10 into the smoking machine 6, and checking the sealing state of the oxygen content detection device of the cigarette tobacco section;
selecting a smoking mode for the smoking machine 6, which may include, for example, a standard smoking mode (ISO smoking mode), a canadian deep smoking mode (HCI smoking mode), or any one of the smoking modes commonly used in the art;
the oxygen concentration C in the sealed cavity 2 and the air chamber 7 before the smoking machine 6 sucks is detected by two oxygen concentration measuring devices 501、C02And sent to the processing system;
closing the air inlet 21 by the sealing cover 22 and starting the smoking machine 6 for smoking;
after the pumping is finished, waiting for the processing system to receive stable sealed cavity detection signals and stable air chamber detection signals, and processing the sealed cavity detection signals and the air chamber detection signals to respectively obtain the oxygen concentration C of the sealed cavity 2 and the air chamber 7 after the smoking machine 6 pumps1、C2(ii) a And
calculating, by the processing system, an oxygen content of the tobacco segment of the cigarette according to the following formula:
X＝(C2-C02)*V2-(C01-C1)*V
wherein X is the oxygen content (mL) of the tobacco segment during smoking; c1Is the oxygen concentration (%) in the sealed cavity 2 after the smoking machine 6 sucks; c2The concentration (%) of oxygen in the air chamber 7 after being sucked by the smoking machine 6; c01Is the oxygen concentration (%) in the air chamber 7 before the smoking machine 6 sucks; c02Is the oxygen concentration (%) in the sealed cavity 2 before the smoking machine 6 sucks; v2Is the volume of the sealed cavity 2; v1Is the volume of the air chamber 7.
In addition, the step of processing the sealed cavity detection signal and the air chamber detection signal may further include converting the sealed cavity detection signal and the air chamber detection signal into the oxygen concentration of the sealed cavity and the air chamber after being sucked by the smoking machine according to the calibration curve.
According to one embodiment, the step of waiting for the seal chamber detection signal and the gas chamber detection signal received by the processing system to stabilize after the pumping is finished may further comprise opening the sealing cap 22 after pumping a plurality of ports (e.g., 3-5 ports) according to the volumes of the seal chamber 2 and the gas chamber 7, and closing the sealing cap 22 for detection until the readings of the two oxygen concentration measuring devices stabilize.
When the cigarette is detected, the cigarette sample to be detected can be balanced for 48 hours in an environment with the temperature of 22 +/-2 ℃ and the relative humidity of 60 +/-5% before being detected, and the cigarette with the average mass difference within the range of 5mg is selected for detection.
Next, two exemplary embodiments according to the present invention will be explained.
First exemplary embodiment
And detecting the mouth-by-mouth oxygen content of a tobacco section of a certain brand of cigarette which is heated and does not burn in an ISO smoking mode.
1. Preparing and selecting a certain brand of cigarette sample which is not burned by heating. Balancing the cigarette sample for 48 hours under the environment that the temperature is 22 +/-2 ℃ and the relative humidity is 60 +/-5%, selecting a plurality of cigarettes, and controlling the average mass within the range of 5 mg.
2. The sealing ring is made of polyvinyl chloride, the thickness of the sealing ring is about 1mm, and the width of the sealing ring is 3 mm. The volume of the sealed chamber 2 was 500mL, and the volume of the gas cell 7 was 500 mL.
3. And calibrating the oxygen concentration measuring devices 5 in the sealed cavity 2 and the air chamber 7, and drawing a standard curve.
4. The cigarette is connected with the cigarette tobacco section oxygen content detection device according to the invention as shown in figure 1, the optical fiber oxygen sensor is placed at the position of the sampling port 5, and the smoking machine is started to perform smoking in an ISO standard mode. Before the smoking machine 6 sucks, the oxygen concentration in the sealed cavity 2 is C01The oxygen concentration in the gas chamber 7 is C02After the smoking machine 6 sucks the smoke, the concentration in the sealed cavity 2 and the concentration in the air chamber 7 are respectively C1、C2. The data records and the results of the oxygen content of the tobacco sections are shown in table 1.
5. After 4 suction ports are sucked, the sealing cover 22 is opened, and measurement is carried out after the reading of the optical fiber oxygen sensor is stable.
TABLE 1 variation of oxygen content of tobacco segments on a cut-by-cut basis in ISO suction mode
Second exemplary embodiment
And detecting the mouth-by-mouth oxygen content of a tobacco section of a certain brand of cigarette which is heated and does not burn in an ISO smoking mode.
1. Preparing and selecting a certain brand of cigarette sample which is not burned by heating. Balancing the cigarette sample for 48 hours under the environment that the temperature is 22 +/-2 ℃ and the relative humidity is 60 +/-5%, selecting a plurality of cigarettes, and controlling the average mass within the range of 5 mg.
2. The sealing ring is made of polyvinyl chloride, the thickness of the sealing ring is about 0.5mm, and the width of the sealing ring is 5 mm. The volume of the sealed cavity 2 is 300mL, and the volume of the air chamber is 300 mL.
3. Calibrating a chromatograph, and drawing a standard curve.
4. The cigarette is connected with the cigarette tobacco section oxygen content detection device according to the invention as shown in figure 1, a chromatographic sampling port is inserted at the position of a sampling port 5, and a smoking machine 6 is started to perform smoking in an ISO standard mode. Before the smoking machine 6 sucks, the oxygen concentration in the sealed cavity 2 is C01The oxygen concentration in the gas chamber 7 is C02And standing for 60s after the smoking machine 6 sucks the smoke, and respectively measuring the oxygen concentrations in the sealed cavity 2 and the air chamber 7 as C1、C2. The data records and the results of the oxygen content of the tobacco sections are shown in table 2.
5. After 3 puffs, the seal cap 22 was opened for 120s and the measurement was performed.
TABLE 2 variation of oxygen content of tobacco segments on a cut-by-cut basis in ISO suction mode
Although exemplary embodiments of the present invention have been described, it will be apparent to those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (23)
1. The utility model provides a cigarette tobacco section oxygen content testing device, the cigarette is including the tobacco section, well hollow segment and the filter tip section that adjoin in proper order, cigarette tobacco section oxygen content testing device is including heating cavity, seal chamber, first seal part, second seal part, two oxygen concentration measuring device, smoking machine, air chamber and processing system, wherein:
the first sealing part is detachably arranged on two end faces of the heating cavity and the sealing cavity which are adjacent to each other, the first sealing part and the second sealing part are detachably arranged on two opposite end faces of the sealing cavity respectively during detection, and the cigarette passes through the first sealing part and the second sealing part during detection so as to seal the tobacco section in the heating cavity and seal a part of the hollow section and the filter section in the sealing cavity;
the end of the filter segment outside the sealed cavity is inserted into the smoking machine and the smoking machine is connected to the air chamber to trap the drawn smoke within the air chamber; and
one of the two oxygen concentration measuring devices is arranged in the sealed cavity, the other is arranged in the air chamber, and each of the two oxygen concentration measuring devices is connected to the processing system which is used for receiving the oxygen concentrations detected by the two oxygen concentration measuring devices and obtaining the oxygen content of the tobacco section by processing the oxygen concentrations.
2. The apparatus for detecting oxygen content in tobacco segment of cigarette according to claim 1, wherein the sealed chamber further comprises an air inlet, a sealing cover for sealing the air inlet, and a first hollow segment insertion hole and a second hollow segment insertion hole formed on two opposite end surfaces, respectively, wherein the first hollow segment insertion hole is used for inserting the first sealing member, and the second hollow segment insertion hole is used for inserting the second sealing member.
3. The cigarette tobacco segment oxygen content detection device of claim 1 or 2, wherein the sealed cavity has a volume of between 50 mL-10L.
4. The cigarette tobacco segment oxygen content detection device of claim 1, wherein each of the first and second sealing members is a sealing ring.
5. The cigarette tobacco segment oxygen content detection device of claim 4, wherein the sealing ring has a thickness of between 0.5mm-10 mm.
6. The cigarette tobacco segment oxygen content detection device of claim 4, wherein the sealing ring has a width of between 1mm-10 mm.
7. The cigarette tobacco segment oxygen content detection device of claim 1, wherein the first sealing member and the second sealing member are made of epoxy, polyvinyl chloride, ethylene propylene diene monomer, silicone, thermoplastic elastomer (TPE), neoprene, or urethane rubber.
8. The cigarette tobacco segment oxygen content detection device of claim 1, wherein the two oxygen concentration measurement devices comprise a miniature probe-type oxygen sensor.
9. The cigarette tobacco segment oxygen content detection device of claim 8, wherein the miniature probe-type oxygen sensor is a solid-state sensor.
10. The cigarette tobacco segment oxygen content detection device of claim 9, wherein the solid state sensor has a gas sensor.
11. The cigarette tobacco segment oxygen content detection device of claim 10, wherein the gas sensor is made of a semiconductor material, a semiconductor composite material, zinc oxide, iridium oxide, and a composite material of optical fiber oxide.
12. The cigarette tobacco segment oxygen content detection device of claim 10, wherein the gas sensor has a size between 0.1nm-1 mm.
13. The cigarette tobacco segment oxygen content detection device of claim 8, wherein the micro probe-type oxygen sensor is an optical fiber oxygen sensor.
14. The cigarette tobacco segment oxygen content detection device of claim 13, wherein the fiber optic oxygen sensor comprises a sensitive membrane formed from a matrix material and a fluorescent dye indicator.
15. The cigarette tobacco segment oxygen content detection device of claim 14, wherein the matrix material comprises one or more of polymethylmethacrylate, polytetrafluoroethylene, cellulose acetate, polyvinyl chloride, polystyrene, or room temperature vulcanized silicone rubber.
16. The cigarette tobacco segment oxygen content detection device of claim 14, wherein the fluorescent dye indicator comprises one or more of dibutyl pyrene or ru (ii) bidentate complex.
17. The cigarette tobacco segment oxygen content detection device of claim 1, wherein the two oxygen concentration measurement devices comprise chromatographic-type or spectral-type measurement devices.
18. The cigarette tobacco segment oxygen content detection device of claim 1, wherein the processing system further comprises:
a detection circuit connected to each of the two oxygen concentration measuring devices, respectively, to receive the detected oxygen concentration; and
a data acquisition system connected to the detection circuit for data acquisition and processing of the oxygen concentration.
19. A method for detecting the oxygen content of a tobacco segment of a cigarette by using the apparatus for detecting the oxygen content of a tobacco segment of a cigarette according to claim 1, comprising the steps of:
inserting a cigarette to be tested into the heating cavity and the sealed cavity through the first sealing part and the second sealing part, so that the tobacco section is sealed in the heating cavity and part of the hollow section and the filter section are sealed in the sealed cavity, and at the moment, an air inlet of the sealed cavity is communicated with the atmosphere;
inserting the end part of the filter tip section into the smoking machine, and checking the sealing state of the oxygen content detection device of the cigarette tobacco section;
selecting a smoking mode for the smoking machine;
detecting the oxygen concentration in the sealed cavity and the air chamber before the smoking machine sucks through the two oxygen concentration measuring devices and sending the oxygen concentration to the processing system;
closing the air inlet through a sealing cover and starting the smoking machine to suck;
after the smoking is finished, waiting for the stability of the sealed cavity detection signal and the air chamber detection signal received by the processing system, and processing the sealed cavity detection signal and the air chamber detection signal to respectively obtain the oxygen concentration in the sealed cavity and the air chamber after the smoking machine smokes; and
calculating, by the processing system, an oxygen content of the tobacco segment of the cigarette according to the following formula:
X＝(C2-C02)*V2-(C01-C1)*V
wherein X is the oxygen content (mL) of the tobacco segment during smoking; c1Is that it is(ii) the concentration (%) of oxygen in the sealed enclosure after smoking by the smoking machine; c2(ii) is the oxygen concentration (%) within the air chamber after smoking by the smoking machine; c01(ii) is the oxygen concentration (%) within the air chamber prior to smoking by the smoking machine; c02(ii) is the oxygen concentration (%) within the sealed enclosure prior to smoking by the smoking machine; v2Is the volume of the sealed cavity; v1Is the volume of the air chamber.
20. The method of claim 19, wherein the step of processing the capsule detection signal and the gas cell detection signal comprises converting the capsule detection signal and the gas cell detection signal to a concentration of oxygen within the capsule and the gas cell, respectively, after smoking of the smoking machine according to a calibration curve.
21. The method of claim 19, wherein waiting for the seal chamber and chamber detection signals received by the processing system to stabilize after the pumping is complete comprises opening the seal cap after pumping multiple ports based on the volume of the seal chamber and chamber, and closing the seal cap for detection until the readings of the two oxygen concentration measurement devices stabilize.
22. The method according to claim 19, wherein the cigarettes are equilibrated for 48 hours at a temperature of 22 ± 2 ℃ and a relative humidity of 60 ± 5% before being tested, and cigarettes having an average mass difference within 5mg are selected for testing.
23. The method of claim 19, wherein the pumping mode comprises an ISO pumping mode or an HCI pumping mode.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114720529A (en) * | 2022-04-19 | 2022-07-08 | 浙江中烟工业有限责任公司 | Method and system for detecting oxygen concentration around combustion cone of burning and smoking cigarette |
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