CN114527034A - Method for improving cigarette density online detection precision by using multi-source temperature dynamic compensation - Google Patents
Method for improving cigarette density online detection precision by using multi-source temperature dynamic compensation Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 105
- 235000019504 cigarettes Nutrition 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 claims abstract description 29
- 241000208125 Nicotiana Species 0.000 claims description 65
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 65
- 241000510097 Megalonaias nervosa Species 0.000 claims description 24
- 238000004364 calculation method Methods 0.000 claims description 24
- 238000005259 measurement Methods 0.000 description 20
- 238000002474 experimental method Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000001739 density measurement Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- KBPHJBAIARWVSC-RGZFRNHPSA-N lutein Chemical compound C([C@H](O)CC=1C)C(C)(C)C=1\C=C\C(\C)=C\C=C\C(\C)=C\C=C\C=C(/C)\C=C\C=C(/C)\C=C\[C@H]1C(C)=C[C@H](O)CC1(C)C KBPHJBAIARWVSC-RGZFRNHPSA-N 0.000 description 2
- 238000000874 microwave-assisted extraction Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000007427 paired t-test Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
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- 239000000047 product Substances 0.000 description 1
- 238000012353 t test Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004260 weight control Methods 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
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/24—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing the transmission of wave or particle radiation through the material
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
- A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
- A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
- A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
Abstract
The method for improving the cigarette density online detection precision by using multi-source temperature dynamic compensation comprises the following steps: step 1, predetermining a standard reference value and a standard reference speed of each temperature, and then calculating a compensation coefficient of unit temperature fluctuation of each temperature at the standard reference speed; step 2, acquiring an actual value of the temperature related to the detection precision of the whole production process of the cigarette making machine in real time; step 3, acquiring the production speed of the cigarette making machine in real time; step 4, calculating the density detection compensation value C1 of each temperature according to a temperature compensation algorithm; step 5, performing speed compensation on the compensation value C1 calculated by the temperature compensation algorithm according to the speed compensation algorithm to obtain a compensation value
Wherein V0 is a markThe quasi-reference speed, V1, is the actual production speed and the offset value, C2, is the final offset value. The invention can improve the online detection precision of cigarette density.
Description
The technical field is as follows:
the invention relates to the technical field of tobacco processes, in particular to a method for detecting cigarette density on line.
Background art:
in the field of tobacco cigarette manufacturing, the microwave is generally installed on a cigarette making machine at home and abroad nowadays, the density and the moisture (ZL200510065057.0, ZL202010415591.4 and ZL200720024015.7) of a cigarette strip are measured on line by utilizing a microwave resonance cavity medium perturbation method, and the weight of the cigarette is calculated. Meanwhile, as an important influencing factor of microwave detection technology, temperature is always the key point of research on various microwave detection systems. For example, Wangjinzhu (influence and solution of temperature on microwave measurement concentration) develops influence on microwave measurement concentration by temperature, and Zhang par (influence of temperature control on microwave extraction of lutein ester) explores influence of temperature control on microwave-assisted extraction rate of lutein ester. In the tobacco industry, the precision requirement for microwave detection of cigarette weight is very high, a series of complete verification methods (for example, the cigarette weight control verification method ZL202010461423.9 of a PASSIM cigarette making machine is researched by Wucheng high level) are established aiming at the verification of microwave detection, the central value is generally 650 mg, and the detection deviation requirement is within 5 mg. By taking a conventional cigarette with the diameter of 7.8mm and the center value of 650 mg as a reference, the same microwave detection device is used for detecting the change of more than 15 mg of cigarettes with the same weight even under different environments (under different temperature conditions actually occurring in various cigarette factories, including but not limited to the influences of various temperatures of environments, devices, materials and the like), which has obvious influence on the quality of the cigarettes. In order to improve the detection precision and stability of microwaves, continuous research work is carried out in the tobacco industry all the time, the temperature is one of the research directions, for example, forest Wigner and the like (a device for detecting the tobacco shred temperature of a microwave density detector and a compensation method ZL202011607135.6) according to the published text, the detection head and the signal converter are designed in a split type, the miniaturization design of the detection head is realized, the installation position of the signal converter is flexible, and the requirement of the limitation of the installation space of an industrial field is well met; by judging the tobacco shred temperature range, the detection and the processing of abnormal conditions are realized, the mathematical model is simplified, and the problem of inaccurate wet density measurement caused by tobacco shred temperature difference is solved.
However, in principle, the accuracy of microwave detection is also affected by the following factors (as shown in fig. 1): for the microwave density detection technology, since the density detection value of the smoke branch section can be considered to be obtained by detecting the resonance frequency offset Δ f caused by the smoke branch section in the resonant cavity, the density value of the smoke branch section is in direct proportion to the resonance frequency offset Δ f caused by the smoke branch section, and the resonance frequency offset Δ f caused by the density is larger, the influence of each temperature element on the resonance frequency offset Δ f of the detection system can be equivalent to the influence on the density detection value.
The microwave source module is generally mainly composed of a microwave emitter, a power amplifier, a high-frequency circuit board and a microwave transmission medium. The temperature change affects the transmitting power and transmission impedance of the microwave source, and the influence of the temperature change on the circuit board is far larger than that on the high-frequency device in the normal working temperature range from the influence degree on the density detection. In commonly used high frequency circuit boards, the sheet loss is approximately proportional to temperature, and the sheet loss is also approximately proportional to frequency (fig. 2, cited by rogerscorp. And because the resonance frequency point is obtained by obtaining a frequency amplitude characteristic curve through scanning the system from low frequency to high frequency and then calculating, the microwave loss at high frequency is increased by the temperature rise. Therefore, the resonance frequency point calculated after the frequency sweep will shift to the low frequency direction when the temperature rises, and the shift direction is consistent with the shift direction caused by the density increase of the cigarette section (fig. 3), that is, the shift amount Δ f of the resonance frequency is increased. Therefore, the temperature rise of the microwave source module causes the detection value to be higher, and the offset is in proportion to the temperature rise.
For the temperature of the detection module, because the detection module also adopts a high-frequency circuit board for microwave transmission, which is the same as the principle that the microwave source is influenced by the temperature, the invention considers that the temperature of the detection module is increased, the resonance frequency offset delta f is increased, the detection value is higher, and the offset is in direct proportion to the temperature amplitude.
The temperature compensation method for the resonant cavity module is characterized in that the resonant cavities in the microwave density detection equipment commonly used in the industry at present all adopt TM010The calculation formula of the resonant wavelength of the cylindrical cavity resonant mode is as follows: λ ═ K0 xr, where K0 is a fixed coefficient. It can be seen that the resonant wavelength is directly proportional to the cavity radius R, and thus the resonant frequency is inversely proportional to the cavity radius R. The radius of the resonant cavity can be slightly changed due to the change of the temperature, and the radius of the resonant cavity can be regarded as being in direct proportion to the temperature in a normal working temperature range, so that the resonant frequency is in inverse proportion to the temperature of the resonant cavity. Therefore, the temperature rise of the resonant cavity module reduces the resonant frequency, the resonant frequency offset delta f is increased, the detection value is higher, and the offset is in direct proportion to the temperature rise.
Aiming at the temperature of a measured object cigarette strip, in the normal cigarette production process, the incoming cut tobacco is in a constant temperature and humidity state, but is influenced by the heat of a fluidized bed of a cigarette making machine after entering the cigarette making machine, so that the temperature is increased. And then, after the tobacco shreds are wrapped into strips by the cigarette paper, the glue sticking part is dried by a constant-temperature soldering iron, the surface temperature of the cigarette paper rises, and meanwhile, a tobacco gun water cooling bed below the tobacco strips takes away part of heat of the tobacco strips, so that the temperature of the tobacco strips is in a relatively complex changing environment.
The cigarette rod temperature (including inside and outside) utilizes the change of pipe tobacco temperature (finally be the inside temperature compensation of cigarette rod) in the fluidized bed and the change of the cigarette rod temperature (finally be the outside temperature compensation of cigarette rod) at the microwave entrance simultaneously, makes real-time compensation calculation to the measuring value of cigarette density. The method comprises the specific steps that a fluidized bed temperature sensor is arranged in a fluidized bed to obtain the real-time temperature of the tobacco shred environment, a temperature sensor is arranged in a water cooling bed to obtain the real-time temperature of the water cooling bed, and the variation quantity of the real-time temperature can be equal to the variation quantity of the surface temperature of the tobacco rod. And the dielectric constant of the material is increased due to the increase of the temperature, the microwave energy loss is increased, the resonant frequency is further reduced, the offset delta f of the resonant frequency is increased, the detection value is higher, and the offset is in direct proportion to the temperature increase.
Aiming at the air source temperature, continuous compressed air is required to be arranged in the cigarette bar detection channel to realize cigarette bar guiding and channel cleaning, and the compressed air can be influenced by the environment before entering the cigarette making machine or the temperature is changed due to the influence of the heat of the cigarette making machine after entering the cigarette making machine. The change of the air source temperature can change the actual temperature of the cigarette when the cigarette passes through the detection point and the temperature of the detection channel to a certain extent, thereby influencing the measurement result.
In summary, the general knowledge in the art suggests that: in actual production, the fluctuation of the tobacco shred temperature is minimal or even no fluctuation, namely, the method mainly plays a role in providing a warning function of loss or overrun of the tobacco shred temperature, and for temperature compensation, the compensation function of improving the measurement precision is quite limited. The reason is mainly shown in the following aspects:
1) the method only considers the influence of the pure tobacco shred temperature, but does not consider the influence of the density measurement deviation caused by the working conditions of a plurality of key links 40 in the 3 key processes of pneumatic tobacco shred feeding, tobacco shred suction forming and filter tip assembling in the most cigarette process, and the working conditions in the processes change more frequently than the tobacco shred temperature, namely have larger influence on the measurement, which is the key point that the cigarette density detection precision by the microwave method is not enough at present. For example: 1) the influence of the temperature change of the microwave core devices such as the microwave source module, the detection module, the resonant cavity module and other microwave detection system temperature sensitive modules on the measurement result deviation is not considered, and specifically, the deviation of the frequency generated due to the temperature can be shown in fig. 2 and fig. 3; before the cigarette equipment is operated, certain preheating is needed, namely, the measurement is reliable only when the temperature reaches a certain range, so that the cigarette equipment is generally preheated in the early shift during normal production to allow production; if the temperature compensation can be considered, the measurement precision can be effectively improved on one hand, and the starting time can be saved on the other hand; 2) secondly, no consideration is given to the fact that during the production process, a stream of compressed air with a pressure of about 2bar is injected into the cigarette channel, the temperature of the compressed air further influences the actual temperature of the detected cigarette when the detected cigarette passes through the detection point and the temperature of the detection channel, so that the measurement result is influenced, and the temperature of the compressed air is generally uncontrolled in the industrial manufacturing field unless the environment is particularly emphasized, so that the final measurement precision is obviously influenced especially at the climate change node without considering the temperature compensation of the compressed air; 3) although the tobacco shred temperature is compensated, in the whole cigarette manufacturing process, the tobacco shred temperature is only the most initial temperature of the content of the cigarette strip, and the tobacco shred temperature is subjected to a series of heating processes such as material lifting, wind blowing, fluidized bed wire feeding, glue adding, heating of the cigarette segment outer packaging paper by a soldering iron, heating of the filter tip end and the outer packaging paper by a washboard and the like (the processes comprise a process before microwave measurement and a process after microwave measurement, and the fluctuation of the processes causes the deviation of cigarette density measurement no matter before or after the process. For example, assuming that the temperature at the microwave measuring point is 60 degrees, and the heating temperature of the washboard after the measuring point is far more than 60 degrees, which results in the final product, the moisture must be lost, that is, the measured density must deviate from the actual object, so that consideration must be given to the measured density), the total is a comparison file, and the influence of the temperature change of the tobacco rod as the measured object finally entering the resonant cavity and the possible future passing of all heating stations is not considered. 4) Moreover, because the temperature of each station of the cigarette making machine changes frequently, the difference is larger when products with different specifications are produced, for example, the conventional cigarette has the diameter of 7.8mm, the influence degree of the temperature is smaller (the temperature is slowly transferred to the tobacco shreds in the cigarettes), the diameter of the thin cigarettes is only 5.4 mm, and compared with the conventional cigarette, the heated temperature is very easy to transfer to the tobacco shreds in the cigarettes;
in addition, the absence of factors influencing the production speed of the cigarette making machine is a disadvantage of the above mentioned reference document, i.e. at different speeds, it is obvious that at the same temperature, the natural loss of moisture through the same path is small.
In summary, the prior art only considers the compensation of the initial tobacco shred temperature, and cannot really play a role in improving the detection precision.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for improving the online detection precision of cigarette density by using multi-source temperature dynamic compensation.
The invention is applied to a microwave density online detection system of a cigarette making machine, and aims to realize accurate compensation of detection values of the system.
The invention discloses a method for improving cigarette density online detection precision by utilizing multi-source temperature dynamic compensation, which comprises the following steps:
step 1, predetermining a standard reference value and a standard reference speed of each temperature, and then calculating a compensation coefficient of unit temperature fluctuation of each temperature at the standard reference speed. The calculation method is as follows: and aiming at the unit compensation of each temperature, namely fixing other temperatures, changing a certain temperature, obtaining the deviation between the weight calculation value of the standard cigarette and the actual weight of the sampled real object under the experimental condition, obtaining the compensation coefficient of the unit temperature according to the ratio of the deviation between the temperature and the standard reference temperature and the weight deviation, and sequentially obtaining the compensation coefficient corresponding to each temperature at the standard reference speed.
Step 2, acquiring the actual value of the temperature related to the detection precision of the whole production process of the cigarette making machine in real time, comprising the following steps: temperature associated with the microwave detector itself, temperature directly associated with the tobacco rod temperature, temperature associated with the environment.
And 3, acquiring the production speed of the cigarette making machine in real time.
Step 4, calculating a density detection compensation value C1 for each temperature according to a temperature compensation algorithm, specifically comprising:
the density detection compensation amount calculation formula specific to the microwave source temperature is as follows: cy is Ky (Ty-Ty0), wherein Cy is the compensation quantity of the microwave source temperature, Ky is the compensation coefficient of the microwave source temperature, Ty is the microwave source temperature, and Ty0 is the standard reference temperature of the microwave source.
The density detection compensation amount calculation formula specific to the detection module temperature is as follows: cj is Kj x (Tj-Tj0), where Cj is the detection module temperature compensation quantity, Kj is the detection module temperature compensation coefficient, Tj is the detection module temperature, and Tj0 is the detection module standard reference temperature.
The density detection compensation amount calculation formula specific to the resonant cavity temperature is as follows: and Cq is Kq x (Tq-Tq0), wherein Cq is the temperature compensation quantity of the resonant cavity, Kq is the temperature compensation coefficient of the resonant cavity, Tq is the temperature of the resonant cavity, and Tq0 is the standard reference temperature of the resonant cavity.
The density detection compensation amount calculation formula specific to the internal temperature of the cigarette rod is as follows: cs is Ks (Ts-Ts0), wherein Ks is the coefficient of internal temperature compensation of the tobacco rod, Ts is the internal temperature of the tobacco rod, and Ts0 is the standard reference temperature inside the tobacco rod;
the density detection compensation amount calculation formula specific to the external temperature of the cigarette rod is as follows: and Cb is Kb x (Tb-Tb0), wherein Cb is the external temperature compensation amount of the tobacco rod at the microwave inlet, Kb is the external temperature compensation coefficient of the tobacco rod, Tb is the external temperature of the tobacco rod, and Tb0 is the external standard reference temperature of the tobacco rod.
The density detection compensation amount calculation formula specific to the washboard temperature is as follows: and Cw is Tw x (Tw-Tw0), wherein Cw is the temperature compensation amount of the washboard, Kw is the temperature compensation coefficient of the cigarette washboard, Tw is the temperature of the washboard, and Tw0 is the standard reference temperature of the washboard.
The density detection compensation amount calculation formula specific to the compressed air temperature is as follows: and Ck is Kk x (Tk-Tk0), wherein Ck is a compressed air temperature compensation quantity, Kk is a compressed air temperature compensation coefficient, Tk is a compressed air temperature, and Tk0 is a compressed air standard reference temperature.
In summary, the integrated temperature compensation value C1 of the cigarette segment density detection is Cy + Cj + Cq + Cs + Cb + Cw + Ck. Can be expressed as: c1 ═ Ky x (Ty-Ty0) + Kj x (Tj-Tj0) + Kq x (Tq-Tq0) + Ks x (Ts-Ts0) + Kb x (Tb-Tb0) + Kw x (Tw-Tw0) + Kk x (Tk-Tk 0). Wherein the unit of the C1 value is mg/cm3。
Step 5, performing speed compensation on the compensation value C1 calculated by the temperature compensation algorithm according to the speed compensation algorithm to obtain a compensation value
Wherein V0 is the standard reference speed, V1 is the actual production speed, and the compensation value C2 is the final compensation value.
The above steps are performed according to a control period, typically every few millisecond cycles.
Further, the temperature related to the microwave detector itself in step 2 includes: microwave source temperature, detection module temperature and resonant cavity temperature; temperatures directly related to the tobacco rod temperature include: the internal temperature of the cigarette strip, the external temperature of the cigarette strip and the temperature of the washboard; the temperatures associated with the environment include: the temperature of the compressed air; the microwave source temperature, the detection module temperature and the resonant cavity temperature are directly obtained from microwaves, the internal temperature of the cigarette strip is obtained by a tobacco shred temperature sensor, the external temperature of the cigarette strip is represented by the fluidized bed temperature, the washboard temperature is detected by using a washboard temperature detection value of a cigarette making machine, and the compressed air temperature is obtained by a gas temperature sensor before the compressed air is injected into a microwave detector.
The working principle of the invention is as follows: according to related references, the density detection offset of the microwave is in direct proportion to the temperature rise and is not only related to the surface temperature of the cigarette strip, so that the standard reference value of the temperature of each component and the standard reference speed of production, which are closely related to the whole production process of the cigarette making machine and the microwave detection precision, are predetermined firstly, then the compensation coefficient of unit temperature fluctuation of each temperature at the standard reference speed is calculated, then the temperature value and the production speed are obtained in real time in the production process, the density detection comprehensive compensation value of each temperature is calculated according to a temperature compensation algorithm, and then the speed compensation is carried out on the comprehensive compensation value C1 calculated by the temperature compensation algorithm according to the speed compensation algorithm to obtain the final density compensation value.
The invention has the advantages that: 1) the deviation of the density detection value caused by the temperature change of all parts in the whole process can be compensated; 2) the speed compensation can be carried out on the compensation value based on the temperature, the high-precision dynamic compensation of the microwave density detection value in the cigarette online production process based on the multi-source temperature and the production speed is comprehensively realized, and further accurate control of cigarette production is further supported.
Drawings
FIG. 1 is a schematic diagram of microwave density detection affecting temperature.
Fig. 2 is a graph of rogues board frequency versus loss.
FIG. 3 is a graph of resonant frequency point shift caused by changes in microwave source temperature.
Fig. 4 is a flow chart of a method of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
1. A standard reference value and a standard reference speed for each temperature are predetermined, and then a compensation coefficient for unit temperature fluctuation of each temperature at the standard reference speed is calculated. The calculation method is as follows: and aiming at the unit compensation of each temperature, namely fixing other temperatures, changing a certain temperature, obtaining the deviation between the weight calculation value of the standard cigarette and the actual weight of the sampled real object under the experimental condition, obtaining the compensation coefficient of the unit temperature according to the ratio of the deviation between the temperature and the standard reference temperature and the weight deviation, and sequentially obtaining the compensation coefficient corresponding to each temperature at the standard reference speed. Compensation coefficients at a standard reference temperature and at a standard reference speed.
In summary, the integrated temperature compensation value C1 of the cigarette segment density detection is Cy + Cj + Cq + Cs + Cb + Cw + Ck. Can be expressed as: c1 ═ Ky x (Ty-Ty0) + Kj x (Tj-Tj0) + Kq x (Tq-Tq0) + Ks x (Ts-Ts0) + Kb x (Tb-Tb0) + Kw x (Tw-Tw0) + Tk x (Tk-Tk 0). Wherein the unit of the C1 value is mg/cm3And the other symbols mean:
ky is the compensation coefficient of the microwave source temperature (the value measured in the experiment is 0.25), Ty is the microwave source temperature, Ty0 is the standard reference temperature of the microwave source (the value of the embodiment is 50 ℃)
Kj is the temperature compensation coefficient of the detection module (the experimental value is 0.2), Tj is the temperature of the detection module, Tj0 is the standard reference temperature of the detection module (the value of the embodiment is 62 ℃)
Kq is the temperature compensation coefficient of the resonant cavity (the value measured by the experiment is 0.27), Tq is the temperature of the resonant cavity, Tq0 is the standard reference temperature of the resonant cavity (the value of the embodiment is 64 ℃)
Ks is the compensation coefficient of the internal temperature of the tobacco rod (the value measured by the experiment is 0.2), Ts is the internal temperature of the tobacco rod, Ts0 is the standard reference temperature of the internal of the tobacco rod (the value of the embodiment is 35 ℃)
Kb is the compensation coefficient of the external temperature of the tobacco rod (the value measured by the experiment is 0.15), Tb is the external temperature of the tobacco rod, Tb0 is the standard reference temperature of the external of the tobacco rod (the value of the embodiment is 60 ℃)
Kw is the compensation coefficient of the external temperature of the washboard (the value measured by the experiment is 0.09), Tw is the washboard temperature, Tw0 is the external standard reference temperature of the tobacco rod (the value of the embodiment is 135 ℃)
Kk is the compressed air temperature compensation coefficient (the value measured by the experiment is 0.08), Tk is the compressed air temperature, Tk0 is the compressed air standard reference temperature (the value of the embodiment is 30 ℃)
The standard reference speed, which is 6000 counts/min, is used in this example.
2. Real-time acquisition of actual values of various temperatures related to detection precision of the whole production process of the cigarette making machine
Wherein mainly include: the microwave source temperature is 51 ℃, the detection module temperature is 63 ℃, the resonant cavity temperature is 65 ℃, the internal temperature of the tobacco rod is 35 ℃, the external temperature of the tobacco rod is 61 ℃, the washboard temperature is 130 ℃, and the compressed air temperature is 30 ℃.
3. The cigarette was obtained at a production rate of 6100 cigarettes/min.
4. According to the formula, the compensation value C1 is calculated as the influence factor caused by the cavity temperature, including: microwave source temperature, detection module temperature, resonant cavity temperature, cigarette bar internal temperature, cigarette bar external temperature, washboard temperature directly related to cigarette bar temperature, compressed air temperature related to environment, and microwave detector temperature; the temperature of the microwave source, the temperature of the detection module and the temperature of the resonant cavity are directly obtained from microwaves, the internal temperature of the cigarette strip is obtained by a tobacco shred temperature sensor, the external temperature of the cigarette strip is represented by the temperature of a fluidized bed, the temperature of the washboard adopts the temperature detection value of the washboard of the cigarette making machine, and the temperature of compressed air is detected by a gas temperature sensor before the compressed air is injected into a microwave detector.
From the actual value and the compensation algorithm, the compensation value C1 calculated for the period is calculated to be 0.42 in table 1.
5. Performing speed compensation on the compensation value C1 calculated by the temperature compensation algorithm according to the speed compensation algorithm to obtain a compensation value
Where V0 is a standard reference speed, 6000 counts/min in the embodiment, and V1 is a value of the compensation value C2 obtained by the calculation formula of C2 in the step 3, where the actual production speed is 6100 counts/min, and C2 in this embodiment is 0.413.
Experimental data prove that the standard deviation of density detection can be reduced by 33.3% by using the method in a conventional production environment without any compensation algorithm, and compared with the temperature compensation of only cut tobacco by 28% alone, the temperature compensation of the cut tobacco is reduced by 28%.
Table 1: calculating a compensation value according to a compensation formula
In order to evaluate the technical effect of the invention, the technical effect is verified by using the measurement standard deviation (mg), and the measurement standard deviations (mg) of the microwave detection system without any temperature compensation, the microwave detection system with tobacco shred temperature compensation alone and the microwave detection system with multi-source temperature and speed dynamic compensation in the patent are respectively compared, the calculation mode of the measurement standard deviation is that 50 cigarettes are taken from each test sample, and the standard deviation of the 50 cigarettes is calculated, namely the measurement standard deviation, which is also a general method for evaluating the microwave detection performance in the tobacco industry, and the comparison results are as follows:
table 2: comparison of measurement standard deviations
In order to confirm whether the measurement standard deviation of the microwave detection system (sample 3) using the multi-source temperature compensation of the patent and the microwave detection system not using the temperature compensation (sample 1) and only using the tobacco shred temperature compensation (sample 2) has a statistical significance difference, the sample 1 and the sample 3, and the sample 2 and the sample 3 are respectively subjected to pairing t test, and the results are as follows:
1. the paired t test of the sample 1 and the sample 3 has the following result:
descriptive statistics
Estimate of paired difference
Examination of
From the above results, it is found that the mean values of sample 1 and sample 3 are 5.38 and 3.58, respectively, the standard deviations are 0.382 and 0.266, respectively, t is 11.62, P is 0.000 < 0.001, and H is rejected according to the test level 0.050Receiving H1Two groups of samples can be considered to have significant differences. It can therefore be considered that the standard deviation of the measurements using the microwave detection system of the present invention is lower than that of the microwave detection system without temperature compensation.
2. The paired t test of the sample 2 and the sample 3 has the following result:
descriptive statistics
Estimate of paired difference
Examination of
From the above results, the mean values of samples 2 and 3 were 4.97 and 3.58, the standard deviations were 0.447 and 0.266, t was 10.03, P was 0.000 < 0.001, and H was rejected according to the 0.05 test level0Receiving H1Two groups of samples can be considered to have significant differences. It can therefore be considered that the standard deviation of the measurements using the microwave detection system of the present invention is lower than that using only the tobacco shred temperature compensation.
Claims (2)
1. The method for improving the cigarette density online detection precision by utilizing multi-source temperature dynamic compensation comprises the following steps:
step 1, predetermining a standard reference value and a standard reference speed of each temperature, and then calculating a compensation coefficient of unit temperature fluctuation of each temperature at the standard reference speed; the calculation method is as follows: aiming at the unit compensation of each temperature, namely fixing other temperatures, changing a certain temperature, obtaining the deviation between a standard cigarette weight calculation value and the actual weight of a sampled real object under the experimental condition, obtaining a compensation coefficient of the unit temperature according to the ratio of the deviation between the temperature and the standard reference temperature and the weight deviation, and sequentially obtaining the compensation coefficient corresponding to each temperature at the standard reference speed;
step 2, acquiring the actual value of the temperature related to the detection precision of the whole production process of the cigarette making machine in real time, comprising the following steps: temperatures associated with the microwave detector itself, temperatures directly associated with the tobacco rod temperature, temperatures associated with the environment;
step 3, acquiring the production speed of the cigarette making machine in real time;
step 4, calculating the density detection compensation value C1 of each temperature according to a temperature compensation algorithm, specifically comprising:
the density detection compensation amount calculation formula specific to the microwave source temperature is as follows: cy is Ky (Ty-Ty0), wherein Cy is the compensation quantity of the microwave source temperature, Ky is the compensation coefficient of the microwave source temperature, Ty is the microwave source temperature, and Ty0 is the standard reference temperature of the microwave source;
specifically, the density detection compensation quantity calculation formula for the detection module temperature is as follows: cj is Kj x (Tj-Tj0), wherein Cj is the temperature compensation quantity of the detection module, Kj is the temperature compensation coefficient of the detection module, Tj is the temperature of the detection module, and Tj0 is the standard reference temperature of the detection module;
the density detection compensation amount calculation formula specific to the resonant cavity temperature is as follows: the temperature compensation method comprises the following steps of (1) Cq is Kq x (Tq-Tq0), wherein Cq is a resonant cavity temperature compensation quantity, Kq is a resonant cavity temperature compensation coefficient, Tq is a resonant cavity temperature, and Tq0 is a resonant cavity standard reference temperature;
the density detection compensation amount calculation formula specific to the internal temperature of the cigarette rod is as follows: cs is Ks (Ts-Ts0), wherein Ks is the coefficient of internal temperature compensation of the tobacco rod, Ts is the internal temperature of the tobacco rod, and Ts0 is the standard reference temperature inside the tobacco rod;
the density detection compensation amount calculation formula specific to the external temperature of the cigarette rod is as follows: cb is Kb x (Tb-Tb0), wherein Cb is the external temperature compensation amount of the tobacco rod at the microwave inlet, Kb is the external temperature compensation coefficient of the tobacco rod, Tb is the external temperature of the tobacco rod, and Tb0 is the external standard reference temperature of the tobacco rod;
the density detection compensation amount calculation formula specific to the washboard temperature is as follows: cw is Kw (Tw-Tw0), wherein Cw is the temperature compensation amount of the washboard, Kw is the temperature compensation coefficient of the cigarette washboard, Tw is the temperature of the washboard, and Tw0 is the standard reference temperature of the washboard;
the density detection compensation quantity calculation formula specific to the compressed air temperature is as follows: ck is Kk x (Tk-Tk0), wherein Ck is a compressed air temperature compensation quantity, Kk is a compressed air temperature compensation coefficient, Tk is a compressed air temperature, and Tk0 is a compressed air standard reference temperature;
to sum up, the comprehensive temperature compensation value C1 of the cigarette section density detection is Cy + Cj + Cq + Cs + Cb + Cw + Ck; can be expressed as: c1 ═ Ky x (Ty-Ty0) + Kj x (Tj-Tj0) + Kq x (Tq-Tq0) + Ks x (Ts-Ts0) + Kb x (Tb-Tb0) + Kw x (Tw-Tw0) + Kk x (Tk-Tk 0); wherein the unit of the C1 value is mg/cm3；
Step 5, performing speed compensation on the compensation value C1 calculated by the temperature compensation algorithm according to the speed compensation algorithm to obtain a compensation value
Wherein V0 is the standard reference speed, V1 is the actual production speed, and the compensation value C2 is the final compensation value.
2. The method for improving the cigarette density online detection precision by using the multi-source temperature dynamic compensation as claimed in claim 1, wherein the method comprises the following steps: the temperatures associated with the microwave detector itself, as described in step 2, include: microwave source temperature, detection module temperature and resonant cavity temperature; temperatures directly related to the tobacco rod temperature include: the internal temperature of the cigarette strip, the external temperature of the cigarette strip and the temperature of the washboard; the temperatures associated with the environment include: the temperature of the compressed air; the temperature of the microwave source, the temperature of the detection module and the temperature of the resonant cavity are directly obtained from microwaves, the internal temperature of the cigarette strip is obtained by a tobacco shred temperature sensor, the external temperature of the cigarette strip is represented by the temperature of a fluidized bed, the temperature of a washboard is detected by the temperature of the washboard of the cigarette making machine, and the temperature of compressed air is obtained by a gas temperature sensor before the compressed air is injected into a microwave detector.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866169A (en) * | 2012-07-02 | 2013-01-09 | 中国电子科技集团公司第四十一研究所 | Compensation method for density data of cigarette igniting end of cigarette |
| CN104165822A (en) * | 2014-08-19 | 2014-11-26 | 云南中烟工业有限责任公司 | Method for quantitatively evaluating uniformity of cigarette density distribution |
| CN104597059A (en) * | 2015-02-13 | 2015-05-06 | 郑州长河电子工程有限公司 | Microwave high-speed on-line detection device for density and moisture content of cigarettes |
| CN207181216U (en) * | 2017-08-22 | 2018-04-03 | 河北省世纪吉星电子科技有限公司 | Density of tobacco rod detection means |
| CN111879661A (en) * | 2020-05-16 | 2020-11-03 | 深圳市鸿捷源自动化系统有限公司 | Microwave online cigarette density and moisture testing device and method |
-
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- 2022-02-11 CN CN202210128705.6A patent/CN114527034B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866169A (en) * | 2012-07-02 | 2013-01-09 | 中国电子科技集团公司第四十一研究所 | Compensation method for density data of cigarette igniting end of cigarette |
| CN104165822A (en) * | 2014-08-19 | 2014-11-26 | 云南中烟工业有限责任公司 | Method for quantitatively evaluating uniformity of cigarette density distribution |
| CN104597059A (en) * | 2015-02-13 | 2015-05-06 | 郑州长河电子工程有限公司 | Microwave high-speed on-line detection device for density and moisture content of cigarettes |
| CN207181216U (en) * | 2017-08-22 | 2018-04-03 | 河北省世纪吉星电子科技有限公司 | Density of tobacco rod detection means |
| CN111879661A (en) * | 2020-05-16 | 2020-11-03 | 深圳市鸿捷源自动化系统有限公司 | Microwave online cigarette density and moisture testing device and method |
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