CN111307657A - Suction resistance temperature compensation measuring method for suction resistance standard rod - Google Patents
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- 238000012937 correction Methods 0.000 claims abstract description 18
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- 238000005086 pumping Methods 0.000 claims abstract description 6
- 238000010521 absorption reaction Methods 0.000 claims description 19
- 230000007613 environmental effect Effects 0.000 claims description 11
- 235000019504 cigarettes Nutrition 0.000 description 7
- 230000000704 physical effect Effects 0.000 description 5
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- 238000012360 testing method Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/10—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference
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Abstract
The invention discloses a method for measuring the suction resistance temperature compensation of a suction resistance standard rod, which comprises the following steps: adjusting the ambient temperature to a predetermined temperature TnPutting the suction resistance standard rod group into the balance box to balance for a period of time; for each suction resistance standard rod at a preset temperature TnPumping for a period of time; measuring each suction resistance standard rod of the suction resistance standard rod group at different preset temperatures TnThe lower suction resistance is M times; obtaining a relation function of a suction resistance parameter P (x) of the suction resistance standard rod group and the ambient temperature T; acquiring a suction resistance correction coefficient k of the suction resistance standard rod by using the relation function; measuring the suction resistance P of a single suction resistance standard rodxAnd obtaining a real-time ambient temperature Tp(ii) a According to Ps＝k×(Tp‑22)+PxOr Ps＝Px{1+[k×(Tp‑22)/100]Calculating to obtain a suction resistance correction value P of a suction resistance standard rods. The method for measuring the suction resistance temperature compensation of the suction resistance standard rod compensates and corrects the measured suction resistance value of the suction resistance standard rod according to the environment temperature measured by the suction resistance of the suction resistance standard rod, thereby effectively eliminating the temperature from absorbing the suction resistance of the suction resistance standard rodThe influence of resistance measurement accuracy has the advantages of strong real-time performance and high accuracy.
Description
Technical Field
The invention relates to the field of cigarette resistance measurement, in particular to a resistance temperature compensation measuring method for a resistance standard rod.
Background
The smoke resistance is an important physical property index of the cigarette, is directly related to sensory quality and mainstream smoke release amount, and is a key parameter strictly controlled in the cigarette production process.
The suction resistance standard rod is a standard component matched with the cigarette physical property comprehensive test platform and is used for calibrating the cigarette physical property comprehensive test platform to realize accurate measurement of a suction resistance value. The standard rod for the resistance absorption is made of chemical inert materials and is verified and assigned under the standard condition of the temperature of 22 ℃. The surface of the existing suction resistance standard rod is a frosted surface or a smooth surface, and is easily influenced by the ambient temperature when the suction resistance value of the suction resistance standard rod is detected.
The comprehensive test bench for physical properties of the suction resistance standard rod and the filter stick is generally stored in a physical detection laboratory and a rolling and wrapping workshop, the temperature of the laboratory fluctuates within the range of (20-24) DEG C, and the temperature of the rolling and wrapping workshop fluctuates within the range of (23-28) DEG C. The temperature of the resistance-suction standard rod is inconsistent when the resistance-suction detection is carried out between a laboratory and a rolling and wrapping vehicle, so that the calibration result of the comprehensive test bench for the physical properties of the cigarettes is influenced, and the accurate measurement of the resistance value of the cigarettes is influenced.
Therefore, how to provide a method capable of effectively eliminating the influence of temperature on the accuracy of resistance-suction standard rod resistance-suction measurement becomes a technical problem to be solved urgently in the field.
Disclosure of Invention
The invention aims to provide a new technical scheme of a suction resistance temperature compensation determination method of a suction resistance standard rod, which can effectively eliminate the influence of temperature on the suction resistance measurement accuracy of the suction resistance standard rod.
The invention provides a method for measuring the suction resistance temperature compensation of a suction resistance standard rod, which comprises the following steps:
adjusting the ambient temperature until the ambient temperature reaches a predetermined temperature TnThen putting the absorption resistance standard rod group into the reactor to balance for a period of time, wherein n is a natural number which is more than or equal to 1, and the preset temperature T is gradually increased along with the gradual increase of nnGradually increasing, wherein the suction resistance standard rod group comprises N suction resistance standard rods with different capillary tube apertures;
each suction resistance standard rod of the suction resistance standard rod group is at a preset temperature TnPumping down for a period of time, and gradually increasing the pumped flow from 0 and keeping the pumped flow at 17.5 mL/s;
measuring each suction resistance standard rod of the suction resistance standard rod group at different preset temperatures TnThe suction resistance is measured for M times, and the actually measured environment temperature T when the suction resistance of the suction resistance standard rod is measured is obtainedm；
According to different actually measured environmental temperatures TmMeasuring the suction resistance parameter P (x) of the suction resistance standard rod group to obtain a relation function of the suction resistance parameter P (x) of the suction resistance standard rod group and the ambient temperature T;
acquiring a suction resistance correction coefficient k of the suction resistance standard rod according to a relation function of a suction resistance parameter P (x) of the suction resistance standard rod group and the ambient temperature T;
measuring the suction resistance P of a single suction resistance standard rodxAnd obtaining the measured resistance to draw PxReal time ambient temperature T of timep；
According to Ps＝k×(Tp-22)+PxOr Ps＝Px{1+[k×(Tp-22)/100]Calculating to obtain a suction resistance correction value P of a suction resistance standard rods。
Optionally, T1At 22 deg.C, with increasing n, presetting a temperature TnThe equal step size is increased.
Optionally, the upper limit of n is 4, and T1At 22 deg.C, a preset temperature TnThe step size of the change of (2).
Optionally, N is 4 and M is 3.
Optionally, the measured ambient temperature T is measured according to different valuesmThe following measured suction resistance parameters P (x) of the suction resistance standard rod set are obtained to obtain a relation function of the suction resistance parameters P (x) of the suction resistance standard rod set and the ambient temperature T, wherein the relation function is as follows:
calculating different measured environmental temperatures T according to the measured suction resistancemThe average value P (a) of the resistance values of all the resistance sucking standard rods of the lower resistance sucking standard rod group;
the average value P (a) of the resistance values of the suction resistance standard rods of the suction resistance standard rod group and the actually measured ambient temperature TmAnd performing linear fitting to obtain a relation function of the resistance value of the resistance absorption standard rod group and the ambient temperature T.
Optionally, the relation function of the resistance value of the resistance-suction standard rod set and the ambient temperature T is p (a) ═ k1T+b1Wherein b is1Is a constant.
Optionally, according to Ps＝k1×(Tp-22)+PxCalculating to obtain a suction resistance correction value P of the suction resistance standard rods。
Optionally, the measured ambient temperature T is measured according to different valuesmThe following measured suction resistance parameters P (x) of the suction resistance standard rod set are obtained to obtain a relation function of the suction resistance parameters P (x) of the suction resistance standard rod set and the ambient temperature T, wherein the relation function is as follows:
calculating different actual measurement environments according to the measured suction resistanceTemperature TmThe average value P (b) of the suction resistance change rate of each suction resistance standard rod of the lower suction resistance standard rod group;
average value P (b) of suction resistance change rate of each suction resistance standard rod of suction resistance standard rod group and actually measured environment temperature TmAnd performing linear fitting to obtain a relation function of the suction resistance change rate of the suction resistance standard rod group and the ambient temperature T.
Optionally, the function of the change rate of the suction resistance standard rod set in relation to the ambient temperature T is p (b) k2T-b2Wherein b is2Is a constant.
Optionally, according to Ps＝Px{1+[k×(Tp-22)/100]Calculating to obtain a suction resistance correction value P of a suction resistance standard rods。
The method for measuring the suction resistance temperature compensation of the suction resistance standard rod compensates and corrects the measured suction resistance value of the suction resistance standard rod according to the environment temperature measured by the suction resistance of the suction resistance standard rod, effectively eliminates the influence of temperature on the suction resistance measurement accuracy of the suction resistance standard rod, and has the advantages of strong real-time performance and high accuracy.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic flow chart of a resistance-suction temperature compensation determination method of a resistance-suction standard rod according to the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention 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 invention 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 invention, 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.
As shown in fig. 1, the method for measuring the resistance-absorption temperature compensation of the resistance-absorption standard rod of the present disclosure includes the following steps:
step S1: adjusting the ambient temperature until the ambient temperature reaches a predetermined temperature TnAnd then putting the suction resistance standard rod set for balancing for a period of time. Wherein n is a natural number greater than or equal to 1, and the preset temperature T is gradually increased along with the gradual increase of nnAnd gradually increases. The above-mentioned equilibration time is typically 12 h.
The suction resistance standard rod group comprises N suction resistance standard rods with different capillary tube apertures. The number of the suction resistance standard rods in the suction resistance standard rod group can be flexibly selected according to actual requirements. For example, N is 4. The standard rod for suction resistance used in the present disclosure is a cylindrical structure having a capillary hole extending in the axial direction of the cylinder between both end faces of the cylinder. The resistance-wicking value of the resistance-wicking standard rod is related to the diameter of the capillary hole (i.e., capillary pore diameter).
In specific implementation, the temperature T is presetnMay be a standard temperature, i.e., T1It was 22 ℃. With increasing n, the preset temperature TnThe increase of (A) can be equal step length increase or flexible setting according to actual requirements.
The capillary aperture of each resistance absorption standard rod of the resistance absorption standard rod group can enable the resistance absorption of each resistance absorption standard rod to be changed in the trend of arithmetic progression. For example, the suction resistances of the respective suction resistance standard rods of the suction resistance standard rod group are 1kPa, 2kPa, 3kPa and 4kPa, respectively.
In order to ensure the accuracy of the measured suction resistance value of the suction resistance standard rod, the preset temperature T can be setnIs an equal step increase, n is higherThe limit may be 4, and T1Set to 22 ℃ and preset temperature TnThe step size of the change of (2). That is, in step S1, T1、T2、T3And T4The temperatures were set at 22 ℃, 24 ℃, 26 ℃ and 28 ℃, respectively.
Step S2: each suction resistance standard rod of the suction resistance standard rod group is at a preset temperature TnThe suction is carried out for a period of time, and the flow rate of the suction is gradually increased from 0 and is kept at 17.5 mL/s. The pumping time and the pumping flow rate can be flexibly selected according to actual requirements. After the flow rate of the suction to the suction resistance standard rod is gradually increased from 0 to 17.5mL/S, the suction to the suction resistance standard rod is continuously performed at the suction flow rate of 17.5mL/S, and then the step S3 is executed to determine the suction resistance of the suction resistance standard rod.
The step S2 can effectively avoid the influence of the gas trapped in the capillary hole of the resistance absorption standard rod on the resistance absorption measurement, and is beneficial to improving the accuracy of the resistance absorption measurement of the resistance absorption standard rod.
Step S3: measuring each suction resistance standard rod of the suction resistance standard rod group at different preset temperatures TnThe suction resistance is measured for M times, and the actually measured environment temperature T when the suction resistance of the suction resistance standard rod is measured is obtainedm. The times for measuring the suction resistance can be flexibly selected according to actual requirements.
In order to balance the relationship between detection efficiency and detection accuracy, M may be set to 3.
Step S4: according to different actually measured environmental temperatures TmAnd measuring the suction resistance parameter P (x) of the suction resistance standard rod set to obtain a relation function of the suction resistance parameter P (x) of the suction resistance standard rod set and the ambient temperature T. The above-mentioned suction resistance parameter p (x) of the suction resistance standard rod set may be, for example, the suction resistance value of each suction resistance standard rod of the suction resistance standard rod set or the suction resistance change rate of each suction resistance standard rod of the suction resistance standard rod set.
Step S5: and obtaining a suction resistance correction coefficient k of the suction resistance standard rod according to a relation function of the suction resistance parameter P (x) of the suction resistance standard rod group and the ambient temperature T.
Step S6: measuring the suction resistance P of a single suction resistance standard rodxAnd obtaining the measured resistance to draw PxReal time ambient temperature T of timep。
Step S7: according to Ps＝k×(Tp-22)+PxOr Ps＝Px{1+[k×(Tp-22)/100]Calculating to obtain a suction resistance correction value P of a suction resistance standard rods。
In one embodiment of the method for measuring the temperature compensation of the resistance absorption of the standard resistance absorption rod of the present disclosure, step S4 may be as follows:
step S4-1: calculating different measured environmental temperatures T according to the measured suction resistancemThe average value P (a) of the resistance values of the suction resistance standard rods of the lower suction resistance standard rod group. Here, P (a) is a measured ambient temperature TmAnd (3) the average value of the suction resistance values of the N suction resistance standard rods in the lower suction resistance standard rod group.
Step S4-2: the average value P (a) of the resistance values of the suction resistance standard rods of the suction resistance standard rod group and the actually measured ambient temperature TmLinear fitting is carried out to obtain a relation function P (a) k of the resistance value of the resistance absorption standard rod group and the ambient temperature T1T+b1Wherein b is1Is a constant. The suction resistance value of the suction resistance standard rod group refers to the average value of the suction resistance values of the suction resistance standard rods in the suction resistance standard rod group.
In this embodiment, step S5 is as follows: the relation function P (a) k of the resistance value of the resistance-absorbing standard rod group and the ambient temperature T1T+b1Obtaining a suction resistance correction coefficient k of a suction resistance standard rod1. Step S6 is as follows: measuring the suction resistance P of a single suction resistance standard rodxAnd obtaining the measured resistance to draw PxReal time ambient temperature T of timep. Step S7 is as follows: according to Ps＝k1×(Tp-22)+PxCalculating to obtain a suction resistance correction value P of the suction resistance standard rods. The suction resistance correction value P of the suction resistance standard rod is obtained by calculationsThe measured suction resistance value of the suction resistance standard rod is compensated and corrected according to the environment temperature measured by the suction resistance of the suction resistance standard rod, the influence of the temperature on the suction resistance measurement accuracy of the suction resistance standard rod is effectively eliminated, and the method has the advantages of strong real-time performance and high accuracy.
In another embodiment of the measuring method for the suction resistance temperature compensation of the suction resistance standard rod of the present disclosure, step S4 may be as follows:
step S4-1: calculating different measured environmental temperatures T according to the measured suction resistancemThe average value P (b) of the suction resistance change rate of each suction resistance standard rod of the lower suction resistance standard rod group. Here, P (b) is a measured ambient temperature TmAnd (3) the average value of the suction resistance change rates of the N suction resistance standard rods in the lower suction resistance standard rod group.
Step S4-2: average value P (b) of suction resistance change rate of each suction resistance standard rod of suction resistance standard rod group and actually measured environment temperature TmLinear fitting is carried out to obtain a relation function P (b) k of the suction resistance change rate of the suction resistance standard rod group and the ambient temperature T2T-b2Wherein b is2Is a constant. The suction resistance change rate of the suction resistance standard rod group refers to the average value of the suction resistance change rates of the suction resistance standard rods in the suction resistance standard rod group.
In this embodiment, step S5 is as follows: the function P (b) k of the relation between the suction resistance change rate of the suction resistance standard rod set and the ambient temperature T2T-b2Obtaining a suction resistance correction coefficient k of a suction resistance standard rod2. Step S6 is as follows: measuring the suction resistance P of a single suction resistance standard rodxAnd obtaining the measured resistance to draw PxReal time ambient temperature T of timep. Step S7 is as follows: according to Ps＝Px{1+[k2×(Tp-22)/100]Calculating to obtain a suction resistance correction value P of a suction resistance standard rods. The suction resistance correction value P of the suction resistance standard rod is obtained by calculationsThe measured suction resistance value of the suction resistance standard rod is compensated and corrected according to the environment temperature measured by the suction resistance of the suction resistance standard rod, the influence of the temperature on the suction resistance measurement accuracy of the suction resistance standard rod is effectively eliminated, and the method has the advantages of strong real-time performance and high accuracy.
An embodiment of the method for measuring the resistance-suction temperature compensation of the resistance-suction standard bar of the present disclosure is specifically described below:
setting the ambient temperature at 22 ℃, and after the ambient temperature reaches the set temperature, selecting 4 suction resistance standard rods (4 suction resistance standard rods form a suction resistance standard rod group) of 1kPa, 2kPa, 3kPa and 4kPa produced by the same manufacturer to balance for 12h at the set temperature. The draw resistance was repeatedly measured 3 times for the draw resistance standard bar groups, respectively, and the measured ambient temperature at this time was recorded to be 22.51 ℃.
Setting the environmental temperature to 24 ℃, 26 ℃ and 28 ℃ in sequence, and balancing the standard resistance rod set at the set temperature for 12 hours after the set temperature is reached. And (3) pumping each suction resistance standard rod of the suction resistance standard rod group for 2min at a set temperature, and gradually increasing the pumped flow from 0 and keeping the pumped flow at 17.5 mL/s.
The measurement was repeated 3 times for 4 draw-drag standard rods of the drag standard rod set, and the measured ambient temperature was recorded as 24.34 deg.C, 26.26 deg.C, and 28.07 deg.C in sequence. According to the suction resistance change rate of the suction resistance standard rod set obtained at different temperatures of 22.51 ℃, 24.34 ℃, 26.26 ℃ and 28.07 ℃, carrying out least square normal fitting on the suction resistance change rate and the temperature of the suction resistance standard rod set to obtain a relation function P (b) k of the suction resistance change rate of the suction resistance standard rod set and the ambient temperature T2T-b2Wherein b is2Is a constant.
Measuring the suction resistance P of the suction resistance standard rod by taking a single suction resistance standard rodxAnd obtaining the suction resistance P of the standard stick for measuring the suction resistancexReal time ambient temperature T of timep。
According to Ps＝Px{1+[k2×(Tp-22)/100]Correcting the suction resistance value of the suction resistance standard rod to be compensated to 22 ℃ under the standard condition to obtain a corrected value Ps。
Although some specific embodiments of the present invention have been described in detail by way of examples, 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 invention. 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 invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A method for measuring the suction resistance temperature compensation of a suction resistance standard rod is characterized by comprising the following steps:
adjusting the ambient temperature until the ambient temperature reaches a predetermined temperature TnThen placing the rods into a suction resistance standard rod group for balancing for a period of time, wherein n is a natural number which is more than or equal to 1 and gradually increases with the n,preset temperature TnGradually increasing, wherein the suction resistance standard rod group comprises N suction resistance standard rods with different capillary tube apertures;
each suction resistance standard rod of the suction resistance standard rod group is at a preset temperature TnPumping down for a period of time, and gradually increasing the pumped flow from 0 and keeping the pumped flow at 17.5 mL/s;
measuring each suction resistance standard rod of the suction resistance standard rod group at different preset temperatures TnThe suction resistance is measured for M times, and the actually measured environment temperature T when the suction resistance of the suction resistance standard rod is measured is obtainedm；
According to different actually measured environmental temperatures TmMeasuring the suction resistance parameter P (x) of the suction resistance standard rod group to obtain a relation function of the suction resistance parameter P (x) of the suction resistance standard rod group and the ambient temperature T;
acquiring a suction resistance correction coefficient k of the suction resistance standard rod according to a relation function of a suction resistance parameter P (x) of the suction resistance standard rod group and the ambient temperature T;
measuring the suction resistance P of a single suction resistance standard rodxAnd obtaining the measured resistance to draw PxReal time ambient temperature T of timep；
According to Ps＝k×(Tp-22)+PxOr Ps＝Px{1+[k×(Tp-22)/100]Calculating to obtain a suction resistance correction value P of a suction resistance standard rods。
2. The method for measuring the temperature compensation of the suction resistance of a standard suction resistance rod according to claim 1, wherein T is T1At 22 deg.C, with increasing n, presetting a temperature TnThe equal step size is increased.
3. The method for measuring the temperature compensation of the suction resistance of a standard suction resistance rod according to claim 2, wherein n has an upper limit of 4 and T is1At 22 deg.C, a preset temperature TnThe step size of the change of (2).
4. The method for measuring the resistance absorption temperature compensation of a standard resistance absorption rod according to claim 1, wherein N is 4 and M is 3.
5. The method for measuring the suction resistance temperature compensation of a suction resistance standard rod according to claim 1, wherein the method is based on different measured environmental temperatures TmThe following measured suction resistance parameters P (x) of the suction resistance standard rod set are obtained to obtain a relation function of the suction resistance parameters P (x) of the suction resistance standard rod set and the ambient temperature T, wherein the relation function is as follows:
calculating different measured environmental temperatures T according to the measured suction resistancemThe average value P (a) of the resistance values of all the resistance sucking standard rods of the lower resistance sucking standard rod group;
the average value P (a) of the resistance values of the suction resistance standard rods of the suction resistance standard rod group and the actually measured ambient temperature TmAnd performing linear fitting to obtain a relation function of the resistance value of the resistance absorption standard rod group and the ambient temperature T.
6. The method for measuring the suction resistance temperature compensation of the suction resistance standard rod according to claim 5, wherein the function of the relation between the suction resistance value of the suction resistance standard rod set and the ambient temperature T is P (a) k1T+b1Wherein b is1Is a constant.
7. The method for measuring the temperature compensation of the suction resistance of a standard suction resistance rod according to claim 6, wherein the measurement is carried out according to Ps＝k1×(Tp-22)+PxCalculating to obtain a suction resistance correction value P of the suction resistance standard rods。
8. The method for measuring the suction resistance temperature compensation of a suction resistance standard rod according to claim 1, wherein the method is based on different measured environmental temperatures TmThe following measured suction resistance parameters P (x) of the suction resistance standard rod set are obtained to obtain a relation function of the suction resistance parameters P (x) of the suction resistance standard rod set and the ambient temperature T, wherein the relation function is as follows:
calculating different measured environmental temperatures T according to the measured suction resistancemThe average value P (b) of the suction resistance change rate of each suction resistance standard rod of the lower suction resistance standard rod group;
average value P (b) of suction resistance change rate of each suction resistance standard rod of suction resistance standard rod group and actually measured environment temperature TmTo perform linearityFitting to obtain a relation function of the suction resistance change rate of the suction resistance standard rod group and the ambient temperature T.
9. The method for measuring the temperature compensation of the suction resistance of the standard suction resistance rod according to claim 8, wherein the function of the change rate of the suction resistance of the standard suction resistance rod set in relation to the ambient temperature T is p (b) k2T-b2Wherein b is2Is a constant.
10. The method for measuring the temperature compensation of the suction resistance of a standard suction resistance rod according to claim 9, wherein the method is based on Ps＝Px{1+[k×(Tp-22)/100]Calculating to obtain a suction resistance correction value P of a suction resistance standard rods。
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Application publication date: 20200619 |