CN113137988A - Flow detection method of special constant flow hole for tobacco - Google Patents
Flow detection method of special constant flow hole for tobacco Download PDFInfo
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- CN113137988A CN113137988A CN202110321159.3A CN202110321159A CN113137988A CN 113137988 A CN113137988 A CN 113137988A CN 202110321159 A CN202110321159 A CN 202110321159A CN 113137988 A CN113137988 A CN 113137988A
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- temperature
- flow
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- tobacco
- flow value
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- 241000208125 Nicotiana Species 0.000 title claims abstract description 36
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000012937 correction Methods 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 11
- 238000011067 equilibration Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/02—Compensating or correcting for variations in pressure, density or temperature
Abstract
The application discloses a flow detection method of a special constant flow hole for tobacco, which comprises the following steps: receiving flow values for a tobacco specific constant flow orifice at a plurality of temperatures, wherein each temperature includes a plurality of flow values; calculating an initial flow value at each temperature; dividing the plurality of temperatures into a plurality of temperature groups; for each temperature group, obtaining a fitted flow value of each temperature; if the error between the fitted flow value of each temperature in the temperature group and the initial flow value of the temperature is smaller than or equal to the threshold value, obtaining a first correction coefficient at each temperature according to a first temperature-flow value fitting curve, and correcting the initial flow value of the corresponding temperature by using the first correction coefficient to obtain a corrected flow value at the temperature. This application has improved the flow measurement precision of special constant current hole of tobacco.
Description
Technical Field
The application relates to the technical field of tobacco manufacturing, in particular to a flow detection method of a special constant flow hole for tobacco.
Background
The special constant flow hole for the tobacco is arranged on special detection equipment such as suction resistance detection equipment and ventilation rate detection equipment, provides a constant flow of 17.5mL/s in the process of measuring the suction resistance and the ventilation rate of the cigarette, and is a standard appliance used on the suction resistance detection equipment and the ventilation rate detection equipment. The special detection equipment is usually placed in a laboratory or a production workshop, the temperature range of the laboratory is 20-24 ℃, and the temperature range of the production workshop is 22-30 ℃. Because the temperature of a laboratory is different from that of a production workshop, and the temperature of different positions of the production workshop is also greatly different, the flow of the constant flow hole is inconsistent, the flow in the pipeline is influenced, and the accurate measurement of the suction resistance and the ventilation rate is further influenced.
At present, the ratio of the internal temperature of the flowmeter to the ambient temperature is used as a temperature compensation coefficient in the tobacco industry to calibrate the flow of the constant flow hole, but the calibration result is a value at a certain specific temperature, and the temperature variation range of the environment where the special detection equipment is located is large, so that the calibration result cannot be applied to all temperatures.
From the above, it is necessary to provide a compensation method suitable for multiple temperatures to eliminate the influence of temperature on the measurement result of the constant flow hole dedicated to tobacco.
Disclosure of Invention
The application provides a flow detection method of a special constant-current hole for tobacco, which comprehensively considers the influence of a plurality of temperature environments, determines the correction coefficient of the flow of the special constant-current hole for tobacco at each temperature, avoids the inadaptability of the compensation coefficient of a single temperature to other temperatures, and improves the flow measurement precision of the special constant-current hole for tobacco.
The application provides a flow detection method of a special constant flow hole for tobacco, which comprises the following steps: receiving flow values for a tobacco specific constant flow orifice at a plurality of temperatures, wherein each temperature includes a plurality of flow values; calculating the average flow value at each temperature as the initial flow value of the temperature; dividing the plurality of temperatures into a plurality of temperature groups; for each temperature group, selecting a part of temperatures in the temperature group as a first sub-temperature group, and obtaining a first temperature-flow value fitting curve of the temperature group according to the initial flow value of each temperature in the first sub-temperature group, wherein the flow value of each temperature on the first temperature-flow value fitting curve is the fitting flow value of the temperature; if the error between the fitted flow value of each temperature in the temperature group and the initial flow value of the temperature is smaller than or equal to the threshold value, obtaining a first correction coefficient at each temperature according to a first temperature-flow value fitting curve, and correcting the initial flow value of the corresponding temperature by using the first correction coefficient to obtain a corrected flow value at the temperature.
Preferably, if there is a temperature in the temperature set whose error between the fitted flow value and the initial flow value is greater than the threshold, the following steps are repeated until the error between the fitted flow value and the initial flow value of each temperature in the temperature set is less than or equal to the threshold: selecting at least one temperature out of the first sub-temperature group from the temperature group, and combining the temperature with the first sub-temperature group to form a second sub-temperature group; obtaining a second temperature-flow value fitting curve of the temperature group according to the initial flow value of each temperature in the second sub-temperature group; and updating the first temperature-flow value fitting curve by using the second temperature-flow value fitting curve.
Preferably, the difference between adjacent temperatures is the same among the plurality of temperatures.
Preferably, the first temperature-flow value fitting curve is obtained by a linear fitting algorithm.
Preferably, the first correction factor is a slope of a first temperature-flow value fitting curve.
Preferably, the number of temperatures in the first sub-temperature group is not less than half the number of temperatures in the temperature group.
Preferably, the measuring the flow value further comprises:
the tobacco specific constant flow orifice is placed in an environment at each temperature for a first predetermined time of equilibration.
Preferably, before measuring the flow value, the method further comprises the step of placing the device provided with the tobacco-specific constant-flow hole in an environment with each temperature for ventilation for a second preset time.
Preferably, the first predetermined time is not less than 24 hours.
Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic structural diagram of a flow detection device with a constant flow hole dedicated for tobacco provided by the present application;
fig. 2 is a flowchart of a flow detection method of a tobacco-dedicated constant flow orifice provided in the present application.
The figures are labeled as follows:
100-digital flowmeter 200-console 201-processor
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
The application provides a flow detection device of special constant flow orifice of tobacco. As shown in fig. 1, the flow sensing apparatus includes a digital flow meter 100 and a console 200.
The digital flowmeter is installed in the detection equipment special for the tobacco and is used for measuring the flow value of the constant flow hole special for the tobacco at a plurality of temperatures. The digital flowmeter is in signal connection with the console.
Preferably, the digital flowmeter is provided with a temperature detection function, so that the measured temperature and the measured flow value can be conveniently and correspondingly determined.
The console 200 is used for collecting signals in the detection equipment dedicated to tobacco, correspondingly processing the collected data, and sending control instructions to parts in the detection equipment dedicated to tobacco. The console 200 comprises a processor 201, and the processor 201 obtains a correction coefficient and a correction flow value of the tobacco-dedicated constant flow hole at each temperature according to the flow value measured by the digital flowmeter.
The flow detection device is used for measuring at a plurality of temperatures and obtaining the correction coefficient, and further obtaining the correction coefficient and the correction flow value at each temperature.
Preferably, the plurality of temperatures are arranged in a descending or descending order, and the difference between two adjacent temperatures is the same, i.e. a series of temperature values are taken at equal intervals.
As an example, the temperature interval is 0.5 ℃ and the temperature ranges from 20 ℃ to 30 ℃ for 21 temperature values.
As another example, the temperature interval is 1 deg.C, and the temperature ranges from 18 deg.C to 28 deg.C, for a total of 11 temperature values.
Specifically, at each temperature, the tobacco specific constant flow orifice is placed in an environment at that temperature for a first predetermined time of equilibration prior to measurement with the digital flow meter. Preferably, the first predetermined time is not less than 24 hours. And the special detection equipment provided with the special constant-current hole for the tobacco is placed in the environment with the temperature and ventilated for a second preset time, so that the gas can fully flow in the pipeline.
The application provides a flow detection method of a special constant flow hole for tobacco, which is applied to a processor 201. As shown in fig. 2, the flow rate detection method includes the following steps:
s210: flow values are received from the digital flow meter for the tobacco specific constant flow orifice at a plurality of temperatures, wherein each temperature includes a plurality of flow values.
And multiple measurements are carried out at each temperature to obtain multiple flow values at the temperature, so that the influence of the error of single measurement on the final accuracy is avoided.
S220: calculating the average flow rate value at each temperature as the initial flow rate value Q of the temperaturei0。
S230: the plurality of temperatures are divided into a plurality of temperature groups. Specifically, the series of temperatures are divided into a plurality of temperature groups in the order from large to small or from small to large, and the number of temperatures in each temperature group may be the same or different.
Taking the above example of 20-30 ℃ as an example, it can be divided into three groups, each group having 7 temperature values, i.e. 20-23 ℃, 23.5-26 ℃, 26.5-30 ℃. It can also be divided into two groups, for example 20 ℃ to 25 ℃ and 25.5 ℃ to 30 ℃.
S240: and aiming at each temperature group, selecting a part of temperatures in the temperature group as a first sub-temperature group, and obtaining a first temperature-flow value fitting curve of the temperature group according to the initial flow value of each temperature in the first sub-temperature group, wherein the flow value of each temperature on the first temperature-flow value fitting curve is the fitting flow value of the temperature.
In particular, several adjacent temperature values or several non-adjacent temperature values are selected from the temperature group to form the first sub-temperature group.
Preferably, at least one non-adjacent set of temperature values is present in the first sub-temperature set.
Preferably, the number of temperatures in the first sub-temperature group is not less than half the number of temperatures in the temperature group.
For example, in the temperature group of 20 ℃ to 25 ℃, 20 ℃, 21 ℃, 22 ℃, 23 ℃, 24 ℃ and 25 ℃ are selected to form a first sub-temperature group, and 20.5 ℃, 21.5 ℃, 22.5 ℃, 23.5 ℃ and 24.5 ℃ are temperature values outside the first sub-temperature group in the temperature group.
Preferably, the first temperature-flow value fitting curve is obtained by a linear fitting algorithm, i.e. the first temperature-flow value fitting curve is a straight line.
The abscissa of the first temperature-flow value fitting curve is a temperature value, and the ordinate is a flow value for each temperature. The ordinate of each temperature on the first temperature-flow value fitting curve is the fitted flow value of that temperature.
S250: and judging whether the error between the fitted flow value of each temperature in the temperature group and the initial flow value of the temperature is less than or equal to a threshold value. If yes, go to S290. Otherwise, S260-S280 are executed until the error of the fitted flow value of each temperature in the temperature set from the initial flow value of the temperature is less than or equal to the threshold value.
S260: at least one temperature outside the first sub-temperature group is selected from the temperature group and combined with the first sub-temperature group to form a second sub-temperature group.
In the above example, one or more temperature values selected from 20.5 deg.C, 21.5 deg.C, 22.5 deg.C, 23.5 deg.C, and 24.5 deg.C are combined with the first sub-temperature to form the second sub-temperature group.
S270: and obtaining a second temperature-flow value fitting curve of the temperature group according to the initial flow value of each temperature in the second sub-temperature group. This step is the same as the curve fitting method in S240, and is not described herein again.
S280: and updating the first temperature-flow value fitting curve by using the second temperature-flow value fitting curve.
And judging whether the updated first temperature-flow value fitting curve obtained in the step S280 meets the condition of the step S250, and if not, repeatedly executing the step S260-the step S280. If yes, go to S290.
S290: obtaining a first correction coefficient K at each temperature according to a first temperature-flow value fitting curvei。
The first correction factor is the slope of the first temperature-flow value fitted curve at a certain point. In the above-described linear fit curve, the first modification coefficient is the slope of the straight line.
S2100: correcting the initial flow value of the corresponding temperature by using the first correction coefficient at each temperature to obtainCorrected flow rate value Q at each temperaturei1Wherein Q isi1＝Ki*Qi0。
The influence of a plurality of temperature environments is comprehensively considered, the correction coefficient of the flow of the special constant-current hole for the tobacco at each temperature is determined, the inapplicability of the compensation coefficient of a single temperature to other temperatures is avoided, and the flow measurement precision of the special constant-current hole for the tobacco is improved.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (9)
1. A flow detection method of a special constant flow hole for tobacco is characterized by comprising the following steps:
receiving flow values for a tobacco specific constant flow orifice at a plurality of temperatures, wherein each temperature includes a plurality of flow values;
calculating an average flow value at each temperature as an initial flow value of the temperature;
dividing the plurality of temperatures into a plurality of temperature groups;
for each temperature group, selecting a part of temperatures in the temperature group as a first sub-temperature group, and obtaining a first temperature-flow value fitting curve of the temperature group according to the initial flow value of each temperature in the first sub-temperature group, wherein the flow value of each temperature on the first temperature-flow value fitting curve is the fitting flow value of the temperature;
if the error between the fitted flow value of each temperature in the temperature group and the initial flow value of the temperature is smaller than or equal to a threshold value, obtaining a first correction coefficient at each temperature according to the first temperature-flow value fitted curve, and correcting the initial flow value of the corresponding temperature by using the first correction coefficient to obtain a corrected flow value at the temperature.
2. The flow detection method of the special constant flow hole for tobacco as claimed in claim 1, wherein if there is a temperature in the temperature group whose error between the fitted flow value and the initial flow value is greater than the threshold value, the following steps are repeated until the error between the fitted flow value and the initial flow value of each temperature in the temperature group is less than or equal to the threshold value:
selecting at least one temperature out of a first sub-temperature group from the temperature group, and combining the temperature with the first sub-temperature group to form a second sub-temperature group;
obtaining a second temperature-flow value fitting curve of the temperature group according to the initial flow value of each temperature in the second sub-temperature group;
updating the first temperature-flow value fitting curve with the second temperature-flow value fitting curve.
3. The method for detecting the flow rate of the constant flow hole dedicated to tobacco according to claim 1 or 2, wherein the difference between adjacent temperatures is the same among the plurality of temperatures.
4. The flow detection method of the special constant flow hole for tobacco according to claim 1, characterized in that the first temperature-flow value fitting curve is obtained by a linear fitting algorithm.
5. The method for detecting the flow rate of the constant flow hole special for the tobacco as claimed in claim 4, wherein the first correction coefficient is a slope of the first temperature-flow rate value fitting curve.
6. The method for detecting the flow of the tobacco-dedicated constant-flow hole according to claim 1, wherein the number of the temperatures in the first sub-temperature group is not less than half of the number of the temperatures in the temperature group.
7. The flow detection method of the tobacco-dedicated constant flow hole according to claim 1, wherein the flow value measurement further comprises:
the tobacco specific constant flow orifice is placed in an environment at each temperature for a first predetermined time of equilibration.
8. The method for detecting the flow rate of the tobacco-dedicated constant flow hole according to claim 1 or 7, wherein before measuring the flow rate value, the method further comprises placing a device in which the tobacco-dedicated constant flow hole is installed in an environment at each temperature and ventilating for a second predetermined time.
9. The flow rate detection method of the tobacco-dedicated constant flow hole according to claim 7, wherein the first predetermined time is not less than 24 hours.
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| CN202110321159.3A CN113137988B (en) | 2021-03-25 | 2021-03-25 | Flow detection method of constant flow hole special for tobacco |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110321159.3A CN113137988B (en) | 2021-03-25 | 2021-03-25 | Flow detection method of constant flow hole special for tobacco |
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| CN113137988B CN113137988B (en) | 2023-11-21 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307657A (en) * | 2020-03-17 | 2020-06-19 | 河南中烟工业有限责任公司 | Suction resistance temperature compensation measuring method for suction resistance standard rod |
| CN111307655A (en) * | 2020-03-17 | 2020-06-19 | 河南中烟工业有限责任公司 | Cigarette resistance temperature compensation measuring method |
| CN112229455A (en) * | 2020-10-12 | 2021-01-15 | 中国烟草总公司郑州烟草研究院 | Volume flow adjustable suction resistance standard rod measuring method |
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2021
- 2021-03-25 CN CN202110321159.3A patent/CN113137988B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307657A (en) * | 2020-03-17 | 2020-06-19 | 河南中烟工业有限责任公司 | Suction resistance temperature compensation measuring method for suction resistance standard rod |
| CN111307655A (en) * | 2020-03-17 | 2020-06-19 | 河南中烟工业有限责任公司 | Cigarette resistance temperature compensation measuring method |
| CN112229455A (en) * | 2020-10-12 | 2021-01-15 | 中国烟草总公司郑州烟草研究院 | Volume flow adjustable suction resistance standard rod measuring method |
Non-Patent Citations (2)
| Title |
|---|
| S. COLARD: "Compensation for the effects of ambient conditions on the calibration of multi-capillary pressure drop standards", CONTRIBUTIONS TO TOBACCO RESEARCH, vol. 21, no. 3 * |
| 邹诚志: "基于 CFO 器件的卷烟吸阻检测装置设计", 安徽农业科学, vol. 46, no. 16 * |
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