CN108896441B - Correction method for detecting density distortion of end part of filter stick by microwave densitometer - Google Patents
Correction method for detecting density distortion of end part of filter stick by microwave densitometer Download PDFInfo
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Abstract
The invention discloses a correction method for detecting density distortion of a filter stick end by a microwave densitometer, which comprises the following steps: detecting the density of the filter stick for one time by using the characteristic that a microwave densitometer detects accurate data of the non-end part of the filter stick to obtain detection data of the end part distortion of the filter stick; changing the original end of the filter stick into a non-end to carry out one-time measurement to obtain non-distorted detection data of the original end of the filter stick; carrying out regression analysis on distorted detection data and non-distorted detection data of the same detection unit, and establishing a data correction mathematical model of the unit; and establishing data correction mathematical models of all detection units needing to be corrected, and correcting distortion data obtained by measuring filter rods with the same specification by applying the corresponding data correction mathematical models to obtain accurate data. The invention is not affected by the uniformity of the axial density of the object, and has accurate compensation, strong applicability and convenient operation.
Description
Technical Field
The invention relates to the technical field of tobacco detection, in particular to a correction method for detecting density distortion of a filter stick end by a microwave densitometer.
Background
At present, the density detection current situation of filter stick products is as follows: the microwave densitometer can carry out density detection on an object by taking the length of 1mm or less as a measuring unit, so that the microwave densitometer is very convenient for detecting and analyzing the density and the fluctuation of the filter stick.
The filter stick density detection device has certain defects in density detection processing, and due to the fact that the resonant cavity has certain width, when the end of an object image filter stick is measured, a measured object does not completely fill the resonant cavity, the measured value cannot truly reflect the actual density of the measured object, certain deviation always occurs, and negative effects are brought to filter stick axial density monitoring and analysis.
In order to eliminate the deviation when the microwave densitometer detects the end of the filter rod, the prior document with the application number of 201210224705.2 discloses a patent named as "compensation method of density data of cigarette end of the filter rod", and through experimental analysis, the method proposed in the patent compensates the object with good uniformity of axial density, but the compensation effect is poor when the uniformity of axial density of the object is not good.
In summary, in the prior art, an effective solution is not yet available for the problem of correcting density distortion when the axial density uniformity of an object is not good.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a correction method for detecting the density distortion of the end part of a filter stick by a microwave densitometer, and the correction method is a compensation method which is not influenced by the axial density uniformity of an object and has the advantages of accurate compensation, strong applicability and convenient operation.
The correction method for detecting the density distortion of the end part of the filter stick by the microwave densitometer comprises the following steps:
detecting the density of the filter stick for one time by using the characteristic that a microwave densitometer detects accurate data of the non-end part of the filter stick to obtain detection data of the end part distortion of the filter stick;
changing the original end of the filter stick into a non-end to carry out one-time measurement to obtain non-distorted detection data of the original end of the filter stick;
carrying out regression analysis on distorted detection data and non-distorted detection data of the same detection unit, and establishing a data correction mathematical model of the unit;
and establishing data correction mathematical models of all detection units needing to be corrected, and correcting distortion data obtained by measuring filter rods with the same specification by applying the corresponding data correction mathematical models to obtain accurate data.
In a further preferred technical scheme, the specific scheme for changing the original end of the filter stick into the non-end is as follows: the end of the detected filter stick is tightly butted with the end of another filter stick, or
Cutting the middle of the detected filter stick, and then tightly butting the two original end parts of the filter stick, or
And tightly butting the end of the detected filter stick with one newly cut end.
In a further preferred technical scheme, the end of the detected filter stick is tightly butted with the end of another filter stick, and when the detected filter stick is a filter stick with unit length value of millimeter as an integer, the detection is started from the detected filter stick in the second detection.
According to a further preferable technical scheme, when the other filter stick is a filter stick with unit length value of millimeter as an integer, the first detection end of the detected filter stick is tightly butted with the end part of the other filter stick, and the detection from the other filter stick is started in the second detection.
According to a further preferable technical scheme, when the two filter rods of the detected filter rod and the other filter rod are both filter rods with unit length values of millimeters as integers, the end of the detected filter rod is tightly butted with the end of the other filter rod, and then the detection is started from the detected filter rod or the other filter rod during the second detection.
According to a further preferable technical scheme, one millimeter of the filter stick is one unit when the microwave densitometer detects the density of the filter stick.
In a further preferred technical scheme, the number of the detection units needing to be corrected for the filter stick is 4-8.
According to a further preferable technical scheme, the middle of the same filter stick is cut into two sections, and the B point in the middle of the detected filter stick from the A point is cut at a position of a whole millimeter.
According to a further preferable technical scheme, the end part A and the end part B are exchanged, and the density value of the point A is measured twice before and after the density value of the point A corresponds to the same millimeter filter stick.
Compared with the prior art, the invention has the beneficial effects that:
the invention utilizes the characteristic that the microwave densitometer detects the accurate data of the non-end part of the filter stick, establishes the data correction mathematical model of all the measurement units needing to be corrected, utilizes the model to correct the data, is not influenced by the uniformity of the axial density of the object, and has accurate compensation, strong applicability and convenient operation.
The invention tightly joints the end of a detected filter stick with the end of another filter stick, and the corresponding precondition is as follows: the detected filter stick is a filter stick with unit length value of millimeter as an integer, and the detection is started from the detected filter stick in the second detection; or the other filter stick is a filter stick taking the unit length value of millimeter as an integer, the first detection end of the detected filter stick is tightly butted with the end part of the other filter stick, and the detection is started from the other filter stick in the second detection; when the two filter sticks are filter sticks with unit length values of millimeters as integers, the two filter sticks can be randomly butted and detected.
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The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic view showing the detection of two end parts of a filter rod body which are closely butted after the middle part of the filter rod body is cut off.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In an exemplary embodiment of the present application, as shown in fig. 1, there is provided a correction method for detecting density distortion of a filter rod end by a microwave densitometer, including:
detecting a filter stick:
and (3) placing the first normal filter stick into a microwave densitometer for detection, so that the end A is detected firstly to obtain end detection data A1jd which is a distortion value, then cutting the filter stick at a point B at the middle position of a whole millimeter from the point A, switching over the end A, B, tightly connecting the two ends of the cut CB and BA for second measurement, so that the end B is detected firstly to obtain middle detection data A1jz which is a non-distortion value.
The density value output by the microwave densitometer is a unit from one millimeter from the end, and the point B is arranged at the middle millimeter position from the point A during cutting, so that after the end is exchanged, the density value of the point A is measured twice before and after the density value of the point A corresponds to the same millimeter filter stick, otherwise, the density value cannot be guaranteed.
Detecting the ith filter stick according to the method for detecting the first filter stick to obtain end detection data Aijd and middle detection data Aijz;
j is the detection unit number, and is an integer from 1 to m, and m is the maximum distortion unit number, and is generally 4-8.
i is the number of filter sticks and is an integer from 1 to n, and the value of n is 30-50.
Establishing a data correction mathematical model:
performing regression analysis on the two groups of numbers A11 d-An 1d and A11 z-An 1z to establish a data correction mathematical model Y1 of the 1 st detection unit
Performing regression analysis on the two groups of numbers A1 jd-Anjd and A1 jz-Anjz to establish a data correction mathematical model Yj of the jth detection unit
Until the mathematical model Ym of the m unit is built
When the filter stick of the brand is detected in the future, the detection data of the first … … mth unit and the second … … mth unit can be respectively corrected by using the established mathematical models Y1 and Y2 … … Ym, and the detection unit in the application is a detected object which is 1mm long and is detected by using a microwave densitometer.
More detailed example 1
The detection data of the A-brand filter stick is corrected according to the method of the invention:
the correction models of the first to fifth detection units from the extreme end are shown in table 1.
Table 1A brand filter stick detection data correction model table
| Number of detecting unit | Detection data correction model |
| 1 | y＝1.0038x+54.604 |
| 2 | y＝1.0018x+27.123 |
| 3 | y＝0.9963x+13.242 |
| 4 | y＝1.0031x+6.8372 |
| 5 | y＝1.006x+2.0894 |
The comparison before and after the detection data correction is shown in table 2.
TABLE 2A reference table before and after correction of detection data of filter stick
| Number of detecting unit | 1 | 2 | 3 | 4 | 5 |
| Data before correction (mg/cm)3) | 83.8883 | 111.895 | 126.866 | 132.5 | 137.368 |
| Corrected data (mg/cm)3) | 138.8111 | 141.0321 | 139.6386 | 139.748 | 140.2816 |
The method of the invention also corrects the detection data of the filter stick with the brand B:
the correction models of the first to fifth detection units from the extreme end are shown in table 3.
Table 3B brand filter stick detection data correction model table
| Number of detecting unit | Detection data correction model |
| 1 | y＝0.9969x+47.909 |
| 2 | y＝0.9928x+21.719 |
| 3 | y＝0.9895x+10.366 |
| 4 | y＝0.9968x+5.3421 |
| 5 | y＝0.9931x+3.1627 |
The control before and after the correction of the test data is shown in Table 4.
Table 4 comparison table before and after correcting detection data of filter stick with grade B
| Number of detecting unit | 1 | 2 | 3 | 4 | 5 |
| Data before correction (mg/cm)3) | 71.1312 | 97.9753 | 112.103 | 118.083 | 121.911 |
| Corrected data (mg/cm)3) | 118.820 | 118.989 | 121.292 | 123.047 | 124.233 |
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (6)
1. The correction method for detecting the density distortion of the end part of the filter stick by the microwave densitometer is characterized by comprising the following steps of:
detecting the density of the filter stick for one time by using the characteristic that a microwave densitometer detects accurate data of the non-end part of the filter stick to obtain detection data of the end part distortion of the filter stick;
changing the original end of the filter stick into a non-end to carry out one-time measurement to obtain non-distorted detection data of the original end of the filter stick;
the specific scheme for changing the original end of the filter stick into the non-end is as follows: the end of the detected filter stick is tightly butted with the end of another filter stick, or
Cutting the middle of the detected filter stick, and then tightly butting the two original end parts of the filter stick, or
Tightly butting the end part of the detected filter stick with a newly cut end part;
when the filter stick is cut off, cutting off the middle of the same filter stick to obtain two sections, and cutting off a B point at the middle whole millimeter from the A point of the detected filter stick when cutting off;
the end part A and the end part B are exchanged, and the density value of the point A is measured twice before and after and corresponds to the same millimeter filter stick;
carrying out regression analysis on distorted detection data and non-distorted detection data of the same detection unit, and establishing a data correction mathematical model of the unit;
and establishing data correction mathematical models of all detection units needing to be corrected, and correcting distortion data obtained by measuring filter rods with the same specification by applying the corresponding data correction mathematical models to obtain accurate data.
2. The correction method for detecting the density distortion of the end part of the filter stick by the microwave densitometer according to claim 1, wherein one millimeter of the filter stick is one unit when the microwave densitometer detects the density of the filter stick.
3. A correction method for detecting density distortion of a filter rod end by a microwave densitometer as claimed in claim 1, wherein the number of detection units required for correcting the filter rod is 4-8.
4. A correction method for detecting end density distortion of a filter stick by a microwave densitometer as claimed in claim 1, wherein the detected end of the filter stick is closely butted with the end of another filter stick, and when the detected filter stick is a filter stick with unit length value of millimeter as integer, the detection is started from the detected filter stick in the second detection.
5. The correction method for detecting the density distortion of the end part of the filter stick by the microwave densitometer as claimed in claim 1, wherein when the other filter stick is a filter stick with the unit length value of millimeter as an integer, the first detection end of the detected filter stick is tightly butted with the end part of the other filter stick, and the detection from the other filter stick is started in the second detection.
6. The correction method for detecting the density distortion of the end part of the filter stick by the microwave densitometer as claimed in claim 1, wherein when both the detected filter stick and the other filter stick are filter sticks with unit length value of millimeter as integer, the end part of the detected filter stick is tightly butted with the end part of the other filter stick, and then the detection is started from the detected filter stick or the other filter stick in the second detection.
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| CN110279142B (en) * | 2019-02-14 | 2021-10-08 | 山东中烟工业有限责任公司 | Method for determining whether bead explosion in filter stick is damaged or not, storage medium and equipment |
| CN110595944B (en) * | 2019-08-21 | 2021-12-03 | 山东中烟工业有限责任公司 | Method and system for correcting end density data of bead blasting filter stick |
| CN115266768A (en) * | 2022-08-01 | 2022-11-01 | 龙岩烟草工业有限责任公司 | Method and device for measuring quality of carbon particles of filter stick and computer equipment |
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