CN102590276B - Method for measuring static combustion rate of cigarette - Google Patents
Method for measuring static combustion rate of cigarette Download PDFInfo
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- CN102590276B CN102590276B CN201210060687.9A CN201210060687A CN102590276B CN 102590276 B CN102590276 B CN 102590276B CN 201210060687 A CN201210060687 A CN 201210060687A CN 102590276 B CN102590276 B CN 102590276B
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Abstract
The invention discloses a method for measuring a static combustion rate of a cigarette. The method is characterized by comprising the following steps of respectively inserting two thermocouples connected with a temperature data recording device into a set position of a measured cigarette sample along an axial direction; igniting the cigarette by an igniter and starting to record temperature data, wherein when a static combustion process of the cigarette is finished, the temperature data is finished being recorded, and the temperature data and corresponding time data are stored at the same time; performing subtraction according to characteristic time points of two tendency graphs of the temperature data of the two thermocouples, which are changed along with the time, and thus obtaining the static combustion rate by dividing a difference value of the time points from a distance between the two thermocouples. The method has the advantage that a measurement result can reflect an internal combustion state of the cigarette truly. According to the calculation of the static combustion rate, the change of the temperature of a detection point is considered, and the detected object is the internal temperature of the cigarette, so that the problems of untidiness of shapes of combustion lines and non-uniformity of propelling speeds are solved, and the accuracy of a detection result is improved.
Description
technical field:
The present invention relates to a kind of assay method of cigarette burning performance, specifically a kind of assay method for static combustion rate of cigarette.
background technology:
Static combustion rate of cigarette is the important indicator that affects puff number and the fired state thereof of cigarette, and then can affect cigarette smoke quality.The cigarette Burning velocity mean speed along cigarette axial advance that is cigarette in the situation Xia， cigarette burning district without suction, unit is mm/min.At present without CORESTA recommend method or iso standard and domestic standard; conventional cigarette Burning velocity detection method has following 2 kinds: (1) cotton thread method, according to ISO 3612-1977 (abrogating) < < Tobacco and tobacco products; Cigarettes; Determination of rate of free combustion > >, is used cigarette burning velocity determination instrument; (2) utilize vision sensor to gather the burning rate of cigarette, as the patent ZL200820080422.6 < < quiet combustion velocity determination of cigarette instrument > >.
Above-mentioned two kinds of methods of measuring cigarette Burning velocity are all to utilize cigarette surface temperature to judge the start-stop signal of burning principle.Cotton thread method is to be wound around cotton thread on the microswitch of 40mm, and when cigarette burning line arrives cotton thread position, cotton thread is blown, and the microswitch of its winding ejects, and determines the start and end time of burning.Vision sensor method is to utilize vision sensor to detect cigarette surface solid-state temperature or combustion wire position, utilizes the translational speed of certain surface solid-state temperature point in quiet combustion process or combustion wire to calculate the Burning velocity of cigarette.Two kinds of method of testings are all closely related with combustion wire, in the actual quiet combustion process of cigarette, have the phenomenons such as combustion wire shape is irregular, and combustion wire fltting speed is inhomogeneous, make testing result discreteness larger.
Summary of the invention
The problem that object of the present invention exists for above-mentioned existing method just, proposes a kind of cigarette Burning velocity assay method that can truly reflect cigarette burning state, and the method testing result accuracy is higher, and can truly reflect the quiet burning state of inner cigarette.
The object of the invention is to be achieved through the following technical solutions:
Assay method for static combustion rate of cigarette of the present invention is: the desired location at tested Cigarette sample inserts respectively two thermopairs that are connected with temperature data pen recorder ((thermopair diameter is 0.25mm) vertically; Lighter lights a cigarette and starts to record temperature data, after cigarette burns and sucks process and carries out, temperature data has recorded, while storage temperature data and corresponding time data, by to two thermo-electric couple temperature datas trend map over time, utilize the characteristic time point of two trend maps to differ from and subtract, utilize two distances between thermopair to obtain Burning velocity divided by the difference result of above-mentioned time point simultaneously, unit is mm/min (mm/min).
Concrete steps are as follows:
The preparation of a, cigarette sample, in temperature, it is 22 ± 2 ℃, relative humidity is under 60 ± 5% environment, by cigarette sample balance 48 hours, select cigarette weight at hundred average individual cigarette weight ± 20mg of sample, some of the cigarette of resistance to suction within the scope of average single the resistance to suction ± 50Pa of hundred samples;
Fixing of b, cigarette sample and thermopair, apart from cigarette burning end 10mm and 50mm place, radially using in advance cushion one aperture, to facilitate the insertion of thermopair, to hold thermopair clamping assembly and make two thermopairs insert cigarette simultaneously, insertion depth is cigarette radius (being accurate to 0.1mm);
C, quiet combustion temperature data acquisition, cigarette and thermopair clamping component fixing device integral body are moved to laboratory with constant temperature and constant humidity or corresponding detection space, with lighter, light a cigarette and start to record temperature data and time data, temperature acquisition frequency is 10Hz per second, storage temperature data and time data after data acquisition completes;
The calculating of d, cigarette quiet combustion partial-length time used, utilizes temperature data to draw temperature curve, calculates the time coordinate X when maximum temperature
1, in like manner can calculate the time coordinate X of second temperature curve maximum temperature
2, cigarette from the quiet combustion of A point to the B point time used is: t=X
2-X
1, unit is min;
E, calculating cigarette Burning velocity, by the Burning velocity of formula v=40/t calculating cigarette, in formula, v is cigarette Burning velocity, the mm/min of unit; Get the mean value of some cigarette Burning velocities as the Burning velocity of this sample.
Assay method tool of the present invention has the following advantages:
(1) repeatability of test result is better than classic method;
(2) test result can truly reflect inner cigarette fired state.In the method, the situation of check point temperature variation is considered in the calculating of Burning velocity, and detection is inner cigarette temperature, thereby eliminated the irregular and inhomogeneous problem of fltting speed of combustion wire shape, testing result accuracy is improved, and can truly reflect the quiet burning state of inner cigarette.
Accompanying drawing explanation
Fig. 1 is the temperature curve with 2 check points of cigarette.
Structural representation when Fig. 2 is cigarette test.
Fig. 3 is cigarette and thermopair clamping component fixing device schematic diagram.
In figure: X
1, X
2be the quiet only time point of lighting, A, B are quiet only check point, 1. trip bolt, the 2. rack rods lighted, 3. compensation lead of thermocouple, 4. thermocouple signal plug, 5. thermopair clamping assembly, 6. thermopair clamping securing member, 7. thermopair, 8. tested cigarette, 9. folder cigarette device.
Embodiment
The present invention is described further assay method below with reference to accompanying drawing:
The preparation of a, cigarette sample, is 22 ± 2 ℃ in temperature, under the environment that relative humidity is 60 ± 5%, by cigarette sample balance 48 hours.Utilize multi-functional test desk to select cigarette weight at hundred average individual cigarette weight ± 20mg of sample, 10 of the cigarette of resistance to suction within the scope of average single the resistance to suction ± 50Pa of hundred samples.
Fixing of b, cigarette sample and thermopair, apart from cigarette burning end 10mm and 50mm place, radially using in advance cushion one aperture, to facilitate the insertion of thermopair, hold thermopair clamping assembly makes two thermopairs insert cigarette simultaneously, with rack rod, thermopair being clamped to assembly, cigarette, folder cigarette device is connected and fixed, guarantee that each several part relative position does not move with space and changes (see figure 3), insertion depth is cigarette radius (being accurate to 0.1mm) (see figure 2).
C, quiet combustion temperature data acquisition, cigarette and thermopair clamping component fixing device integral body are moved to laboratory with constant temperature and constant humidity or corresponding detection space, with lighter, light a cigarette and start to record temperature data and time data, temperature acquisition frequency is 10Hz per second, storage temperature data and time data after data acquisition completes.
The calculating of d, cigarette quiet combustion partial-length time used, utilizes temperature data to draw temperature curve (see figure 1), calculates the time coordinate X when maximum temperature
1, in like manner can calculate the time coordinate X of second temperature curve maximum temperature
2, cigarette from the quiet combustion of A point to the B point time used is: t=X
2-X
1, unit is min;
E, calculating cigarette Burning velocity.The Burning velocity that calculates cigarette by formula v=40/t, in formula, v is cigarette Burning velocity, the mm/min of unit.Finally, get the mean value of 10 cigarette Burning velocities as the Burning velocity of this sample.Table 1 is the testing result of this method and the contrast of traditional cotton collimation method.
Claims (2)
1. for an assay method for static combustion rate of cigarette, it is characterized in that: the desired location at tested Cigarette sample inserts respectively two thermopairs that are connected with temperature data pen recorder vertically; Utilize lighter to light a cigarette and start to record temperature data, after the quiet combustion process of cigarette is carried out, temperature data has recorded, while storage temperature data and corresponding time data, by to two thermo-electric couple temperature datas trend map over time, utilize the characteristic time point of two trend maps to differ from and subtract, utilize two distances between thermopair to obtain Burning velocity divided by the difference result of above-mentioned time point simultaneously; Concrete steps are as follows:
The preparation of a, cigarette sample, is 22 ± 2 ℃ in temperature, under the environment that relative humidity is 60 ± 5%, by cigarette sample balance 48 hours, selects some of cigarette;
Fixing of b, cigarette sample and thermopair, is radially using cushion one aperture in advance apart from cigarette burning end 10mm and 50mm place, holds thermopair clamping assembly and makes two thermopairs insert cigarette simultaneously, and insertion depth is cigarette radius;
C, quiet combustion temperature data acquisition, cigarette and thermocouple clamp assemblies stationary installation integral body are moved to laboratory with constant temperature and constant humidity or corresponding detection space, with lighter, light a cigarette and start to record temperature data and time data, temperature acquisition frequency is 10Hz per second, storage temperature data and time data after data acquisition completes;
The calculating of d, cigarette quiet combustion partial-length time used, utilizes temperature data to draw temperature curve, calculates the time coordinate X of maximum temperature
1, in like manner can calculate the time coordinate X of second temperature curve maximum temperature
2, cigarette from the quiet combustion of A point to the B point time used is: t=X
2-X
1, unit is min;
E, calculating cigarette Burning velocity, by the Burning velocity of formula v=40/t calculating cigarette, in formula, v is cigarette Burning velocity, the mm/min of unit; Get the mean value of some cigarette Burning velocities as the Burning velocity of this sample.
2. the assay method for static combustion rate of cigarette according to claim 1, is characterized in that: described thermopair diameter is 0.25～0.30mm.
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| CN201210060687.9A CN102590276B (en) | 2012-03-09 | 2012-03-09 | Method for measuring static combustion rate of cigarette |
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| CN201210060687.9A CN102590276B (en) | 2012-03-09 | 2012-03-09 | Method for measuring static combustion rate of cigarette |
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| CN102590276B true CN102590276B (en) | 2014-02-12 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104897847A (en) * | 2015-06-16 | 2015-09-09 | 安徽中烟工业有限责任公司 | Method and device for testing burning rate of carbonaceous heat source |
| CN105158418A (en) * | 2015-08-18 | 2015-12-16 | 北京工业大学 | Smoking simulation mechanism |
| CN105352961B (en) * | 2015-11-06 | 2018-01-30 | 浙江中烟工业有限责任公司 | A kind of cigarette burn rate assay method |
| CN106770450B (en) * | 2016-11-17 | 2019-01-22 | 中国烟草总公司郑州烟草研究院 | A kind of detection method of charcoal hot type cigarette heating source combustion characteristics |
| CN108279256B (en) * | 2018-02-02 | 2020-10-30 | 中国烟草总公司郑州烟草研究院 | Cigarette instantaneous burning rate characterization method based on temperature centroid |
| CN110108833A (en) * | 2019-05-24 | 2019-08-09 | 中国农业科学院烟草研究所 | A kind of measuring method of cigarette burn rate |
| CN110455861A (en) * | 2019-08-08 | 2019-11-15 | 西安近代化学研究所 | A kind of solid propellant combustion rate and combustion wave synchronous detecting method |
| CN110967442B (en) * | 2019-12-27 | 2022-05-06 | 江苏中烟工业有限责任公司 | Method and system for detecting instantaneous burning rate of cigarette |
| CN111855887A (en) * | 2020-07-01 | 2020-10-30 | 福建中烟工业有限责任公司 | Cigarette smoldering test system and cigarette smoldering test method |
| CN113876038A (en) * | 2021-10-26 | 2022-01-04 | 湖北中烟工业有限责任公司 | Method and device for measuring and starting temperature of smoke of heated cigarette |
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| CN2274762Y (en) * | 1996-08-21 | 1998-02-18 | 中国烟草总公司郑州烟草研究院 | Inspector for velocity of free combustion of tobacco |
| CN201188099Y (en) * | 2008-05-07 | 2009-01-28 | 郑州嘉德机电科技有限公司 | Determinator for cigarette freely combustion speed |
| CN102109393B (en) * | 2010-11-30 | 2012-05-23 | 中国烟草总公司郑州烟草研究院 | Cigarette ignition temperature distribution detector and automatic control method thereof |
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