CN116458675A - Ultra-precise detection method and device for cigarette weight and cigarette making machine - Google Patents
Ultra-precise detection method and device for cigarette weight and cigarette making machine Download PDFInfo
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- 235000019504 cigarettes Nutrition 0.000 title claims abstract description 243
- 238000001514 detection method Methods 0.000 title claims abstract description 77
- 238000005070 sampling Methods 0.000 claims abstract description 139
- 241000208125 Nicotiana Species 0.000 claims description 41
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 41
- 238000005520 cutting process Methods 0.000 claims description 26
- 238000004364 calculation method Methods 0.000 claims description 19
- 238000005259 measurement Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 4
- 238000004260 weight control Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
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- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- A24C5/3424—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes by weighing
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- 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
-
- 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
- A24C5/14—Machines of the continuous-rod type
- A24C5/28—Cutting-off the tobacco rod
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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
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Abstract
The application discloses an ultra-precise detection method and device for cigarette weight and a cigarette making machine, wherein the ultra-precise detection method comprises the following steps: receiving the density and the radius of a plurality of sampling points on a double-length cigarette bar, wherein the double-length cigarette bar comprises a front cigarette bar and a back cigarette bar which are connected with each other, and the sampling point width of each sampling point is the same; and calculating the first weight of the front cigarette rod and the second weight of the back cigarette rod according to the density, the sampling point width and the radius of all the sampling points. According to the method, the multiple sampling points are arranged on the double-length cigarette strip, the weight of the cigarette strip is calculated by using the density, the radius and the sampling point width detected by all the sampling points, and the online measurement error caused by taking the radius as a constant is avoided, so that the calibration error is reduced.
Description
Technical Field
The application relates to the technical field of detection, in particular to an ultra-precise detection method and device for cigarette weight and a cigarette making machine.
Background
The weight of cigarettes is one of the most important physical indexes of cigarettes, and how to accurately control the weight on line is always the research focus of the domestic and foreign tobacco industry. Through technical development for many years, the existing weight control system in the tobacco industry detects the weight of cigarettes through a microwave density sensor, and feeds an actual weight signal back to the control system, and compared with a given weight, an actuating mechanism is controlled to adjust the leveling device to move up and down, so that the weight of the cigarettes is controlled.
Therefore, the microwave density sensor is one of the most important quality detection sensors of the cigarette making machine, is a core element of a cigarette weight control system, and the cigarette making machine weight control system constructed based on the detection system greatly promotes the progress of cigarette making technology and changes the making mode that the cigarette making machine weight control can only be adjusted manually. The microwave density sensor can perform online weight detection, and can realize the rejection of overall weight abnormality and local abnormality besides control. Therefore, the accuracy of online detection is improved, and the method has important significance for improving the quality of cigarettes. However, some high-end equipment and high-end microwave density sensors are mainly imported, and the technology and interfaces are completely blocked. In recent years, along with the demands of cost reduction, efficiency enhancement and digital design, the excavation of manufacturing bottom data is further expanded, and the most important of rolling equipment and working procedures is that the detection data in cigarettes is more accurate.
The principle of microwave-based cigarette weight detection is shown in fig. 3, where the signal processing system samples 128 times the density of a double length cigarette rod (hereinafter referred to as the preceding and succeeding cigarette rods, respectively, on the cigarette machine) between two positioning pulses of the shaft encoder, and the system meters the positioning pulses and the incremental pulses generated by the shaft encoder and uses these two sets of pulses to calculate the density of the rod.
From the above, the number of sampling points of the density of each cigarette rod (the preceding cigarette rod and the following cigarette rod) is 64, and the weight of each cigarette rod can be calculated by weighting and summing the sampling results. The on-line detection value is generally calibrated in an off-line comparison sampling mode, so that the on-line detection quality of the microwave sensor is ensured to be consistent with that of an off-line instrument.
However, when calculating the weight of the rod from the sampling result, the circumference of the rod is regarded as a constant, i.e. the radius at each sampling point is the same, and the rod weight is calculated by combining the constant with the rod length. However, the actual circumference of the rod is a variable quantity and the production process is controlled to fluctuate around a central value. Therefore, the existing calculation mode tends to cause larger online measurement errors, so that larger calibration errors are generated during calibration.
In addition, when the weight of the cigarette is calculated according to the sampling result, the length of the cigarette is used as a constant, namely the lengths of the front cigarette and the rear cigarette are the same, but the lengths of the front cigarette and the rear cigarette have a certain error after being actually cut, which causes an online measurement error. For example, a cigarette standard of 650 milligrams for a 54 millimeter unit length may be considered approximately 12 milligrams per millimeter (although the tobacco cut filler distribution within the cigarette is non-uniform). The first cut of the cigarette machine is to cut the rod into double length rods (including a front and a rear), if there is an error in the length of all two rear front and rear rods, assuming that the front is 1 mm long (55 mm) and the rear is 1 mm short (53 mm), this will result in a calculated and actual difference of up to 24 mg. On-line measurement errors can lead to large calibration errors in calibration.
Disclosure of Invention
The application provides an ultra-precise detection method and device for cigarette weight and a cigarette making machine, wherein a plurality of sampling points are arranged on a double-length cigarette rod, the weight of the cigarette rod is calculated by using the density, the radius and the sampling point width detected on all the sampling points, and the online measurement error caused by taking the radius as a constant is avoided, so that the calibration error is reduced.
The application provides an ultra-precise detection method for cigarette weight, which comprises the following steps:
receiving the density and the radius of a plurality of sampling points on a double-length cigarette bar, wherein the double-length cigarette bar comprises a front cigarette bar and a back cigarette bar which are connected with each other, and the sampling point width of each sampling point is the same;
and calculating the first weight of the front cigarette rod and the second weight of the back cigarette rod according to the density, the sampling point width and the radius of all the sampling points.
Preferably, the calculation of the first weight of the preceding tobacco rod and the second weight of the following tobacco rod specifically comprises:
taking the first half part of all the sampling points as the sampling points of the front cigarette bar and the second half part of all the sampling points as the sampling points of the back cigarette bar, so that the lengths of the front cigarette bar and the back cigarette bar are equal;
and calculating a first weight according to the sampling points of the front cigarette bar and the width, density and radius of the corresponding sampling points, and calculating a second weight according to the sampling points of the rear cigarette bar and the width, density and radius of the corresponding sampling points.
Preferably, the ultra-precise detection method further comprises:
receiving the second lengths of the front cigarette bar and the rear cigarette bar after the double-length cigarette bar is cut into the front cigarette bar and the rear cigarette bar, and taking the second lengths as the actual lengths of the front cigarette bar and the rear cigarette bar;
and the first weight is calculated according to the sampling point corresponding to the actual length of the preceding cigarette rod and the density and the radius corresponding to the sampling point, and the second weight is calculated according to the sampling point corresponding to the actual length of the following cigarette rod and the density and the radius corresponding to the sampling point.
Preferably, the ultra-precise detection method further comprises:
the tobacco rod weight detection system is calibrated based on the first and second weights determined from the actual lengths of the preceding and succeeding tobacco rods.
Preferably, the cigarette weight detection system comprises a density detection sensor and a circumference detection sensor which are arranged on the first cutting station and are respectively used for detecting the density and the radius of each sampling point;
wherein the first cutting station is used for cutting double-length cigarette rods.
Preferably, the cigarette weight detection system further comprises a length sensor on the primary cutting station, and the length sensor is used for detecting the second lengths of the front cigarette rod and the rear cigarette rod;
the primary cutting station is used for cutting the double-length tobacco rod into a front tobacco rod and a rear tobacco rod.
The application also provides an ultra-precise detection device for the weight of the cigarettes, which comprises a first receiving module and a calculating module;
the first receiving module is used for receiving the density and the radius of a plurality of sampling points on the double-length cigarette bar, the double-length cigarette bar comprises a front cigarette bar and a back cigarette bar which are connected with each other, and the sampling point width of each sampling point is the same;
the calculating module is used for calculating the first weight of the front cigarette rod and the second weight of the back cigarette rod according to the density, the sampling point width and the radius of all the sampling points.
Preferably, the calculation module includes a division module and a first weight calculation module;
the dividing module is used for taking the first half part of all the sampling points as the sampling points of the front cigarette bar and taking the second half part of all the sampling points as the sampling points of the back cigarette bar, so that the lengths of the front cigarette bar and the back cigarette bar are equal;
the first weight calculation module is used for calculating a first weight according to the sampling points of the front cigarette bar and the width, the density and the radius of the sampling points corresponding to the sampling points, and calculating a second weight according to the sampling points of the rear cigarette bar and the width, the density and the radius of the sampling points corresponding to the sampling points.
Preferably, the ultra-precise detection device further comprises a second receiving module, wherein the second receiving module is used for receiving the second lengths of the front cigarette bar and the rear cigarette bar as the actual lengths of the front cigarette bar and the rear cigarette bar after the double-length cigarette bar is cut into the front cigarette bar and the rear cigarette bar;
the calculation module comprises a second weight calculation module, wherein the second weight calculation module is used for calculating the first weight according to the sampling points corresponding to the actual length of the preceding cigarette rod and the density and the radius corresponding to the sampling points, and calculating the second weight according to the sampling points corresponding to the actual length of the following cigarette rod and the density and the radius corresponding to the sampling points.
The application also provides a cigarette making machine, which comprises a cigarette weight detection system, wherein the cigarette weight detection system is used for executing the ultra-precise detection method.
Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the present application, 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 application and together with the description, serve to explain the principles of the application.
FIG. 1 is a flow chart of an ultra-precise method for detecting the weight of a cigarette provided by the application;
FIG. 2 is a block diagram of a preferred embodiment of the cigarette weight detection system provided herein;
FIG. 3 is a schematic block diagram of a density detection sensor;
FIG. 4 is a graph of resonance curves for a cavity of a density detection sensor and at different densities;
FIG. 5 is a schematic diagram of a segmentation calculation in density detection provided herein;
fig. 6 is a block diagram of an ultraprecise detection device for cigarette weight provided in the present application.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
The application provides an ultra-precise detection method and device for cigarette weight and a cigarette making machine, wherein a plurality of sampling points are arranged on a double-length cigarette rod, the weight of the cigarette rod is calculated by using the density, the radius and the sampling point width detected on all the sampling points, and the online measurement error caused by taking the radius as a constant is avoided, so that the calibration error is reduced. On the basis, the method and the device calculate the respective weight based on the actual lengths of the cut front cigarette bar and the cut back cigarette bar, avoid online measurement errors caused by taking the radius and the length of the front cigarette bar and the cut back cigarette bar as constants, and reduce calibration errors.
Example 1
As shown in fig. 1, the ultra-precise detection method for the weight of the cigarette provided by the application comprises the following steps:
s110: the method comprises the steps of receiving the density and the radius of a plurality of sampling points on a double-length cigarette rod, wherein the double-length cigarette rod comprises a front cigarette rod and a back cigarette rod which are connected with each other, and the sampling point width of each sampling point is the same.
S120: and calculating the first weight of the front cigarette rod and the second weight of the back cigarette rod according to the density, the sampling point width and the radius of all the sampling points.
First embodiment
As an embodiment, in the present application, the cigarette weight detecting system includes an upper computer (e.g., an industrial personal computer for executing S110 and S120) and a shaft encoder (refer to reference numeral 1 in fig. 2), a density detecting sensor (refer to reference numeral 2 in fig. 2) and a circumference detecting sensor (refer to reference numeral 3 in fig. 2) mounted on the first cutting station, for detecting the density and radius of each sampling point, respectively. Wherein the first cutting station is used for cutting double-length cigarette rods. In fig. 2, 4 is a cutting device, 6 is a double length cigarette obtained after cutting at a first cutting station, and 7 is a single length front cigarette rod and a back cigarette rod obtained after cutting at a first cutting station. In this embodiment, the first weight and the second weight are calculated from the density, radius, and sampling point width of each sampling point.
The density detection sensor performs density detection based on microwaves. As shown in fig. 3, the microwave signal is generated by a microwave signal generator, the signal is sent to the resonant cavity assembly through the transmission line, when the tested cigarette rod passes through the resonant cavity, the cigarette rods with different densities and water contents can cause the energy parameters of the microwave electromagnetic field to change to different degrees, and the density signal of the cigarette rod is obtained through detecting, analyzing and processing the energy parameter change quantity and is output to the cigarette weight calculating module, so that the detection of the cigarette weight is realized. A resonance curve in the frequency domain is obtained by the detector, which reflects the electromagnetic properties in the current cavity. The peak of the resonance curve is the highest energy position, and the corresponding frequency is the resonance frequency in the state.
As the rod passes through the cavity of the microwave cavity, rod segments of different densities and moisture content will have different dielectric constants, the real part of which will cause a frequency shift (as shown in the horizontal axis of fig. 4) and the imaginary part will cause a change in the on-load quality factor (Q-value) (as shown in the vertical axis of fig. 4). The complex dielectric constant of the medium can be approximately estimated by measuring the changes of the resonant frequency and the quality factors before and after the resonance cavity (Empty Applicator) and the load (Filled Applicator). The higher the density and humidity, the higher the complex permittivity, the lower the resonance curve (lower the Q value) and the larger the resonance frequency shift.
The microwave scanning head obtains sampling data through AD sampling, and the relation between the sampling data and the tobacco shred density is expressed as:
ρ i ＝Kw i +Q (1)
ρ i representing the density of the cut tobacco; w (w) i Sampling data representing the AD; K. q is a matching coefficient. The density of the cut tobacco can be obtained according to the above formula.
The upper computer performs density sampling for a double-length cigarette bar (including a front cigarette bar and a rear cigarette bar which are connected with each other) for a preset number of times n (for example, 256 times, 128 times, etc.) between two positioning pulses of the shaft encoder, namely, the double-length cigarette bar is divided into a preset number n of sampling points, and segmentation processing is performed, wherein the width of the sampling points corresponding to each sampling point is the same, as shown in fig. 5.
Based on the above, in S110, the density detection sensor and the circumference detection sensor acquire the density and radius at each sampling point using the positioning pulse and the incremental pulse generated by the shaft encoder.
And the upper computer performs data synchronization and data matching on all densities and radiuses acquired by the density detection sensor and the circumference detection sensor through the synchronization bus 8, namely, the densities and the radiuses of the same sampling point are corresponding.
In this embodiment, the lengths of the preceding and following tobacco rods are equal. Thus, in S120, a first weight of the preceding tobacco rod and a second weight of the following tobacco rod are calculated, comprising:
p1: the first half of all the sampling points (1 st to 1 stSample points) as sample points of the preceding cigarette rod, the second half of all sample points (the +.>To n sampling points) as sampling points for the subsequent tobacco rod such that the lengths of the preceding and subsequent tobacco rods are equal.
P2: calculating a first weight W according to the sampling point of the front cigarette rod and the width, density and radius of the corresponding sampling point Front road 1 Calculating a second weight W according to the sampling point of the subsequent cigarette rod and the width, density and radius of the corresponding sampling point Back pass 1 I.e.
At the same time, the total weight W of the double-length cigarette rod can be calculated Total 1 ：
Second embodiment
In a preferred embodiment, the system for detecting the weight of cigarettes further comprises a length sensor 5 at the primary cutting station for detecting the second lengths of the front and rear cigarette rods obtained after the double cigarette rods are cut as the front and rear cigarette rodsActual length of cigarette rod 1 And l 2 As shown in fig. 2. The primary cutting station is used for cutting the double-length tobacco rod into a front tobacco rod and a rear tobacco rod.
As one embodiment, the length sensor system comprises an industrial camera and an LED light source, wherein the LED light source irradiates the cut front cigarette rod and the cut back cigarette rod, photographs are taken through the industrial camera, and machine vision analysis is performed to obtain length information.
In this preferred embodiment, the ultra-precise detection method for the weight of the cigarette further comprises:
the upper computer receives the second lengths of the front cigarette bar and the rear cigarette bar, which are obtained by cutting the double-length cigarette bar into the front cigarette bar and the rear cigarette bar, and the second lengths are used as the actual lengths of the front cigarette bar and the rear cigarette bar. In S120, a first weight is calculated according to the sampling point corresponding to the actual length of the preceding cigarette rod and the density and radius corresponding to the sampling point, and a second weight is calculated according to the sampling point corresponding to the actual length of the following cigarette rod and the density and radius corresponding to the sampling point, namely
This embodiment takes into account the cutting loss, taking the preset number n as 128, the sampling point width of each section of sampling point as 1 mm as an example, if the middle point of the 64 th section is cut, the first 0.5 mm part of the 64 th section belongs to the preceding cigarette rod, the last 0.5 mm part of the 64 th section belongs to the following cigarette rod, the weight of the preceding cigarette rod is the weight of the first 0.5 mm part of the 64 th section and the first 1-63 th section, and the weight of the following cigarette rod is the weight of the last 0.5 mm part of the 64 th section and 65-128 th section for the whole double length cigarette rod. Therefore, the precision of weight detection is improved, the control performance is further improved, and the tobacco shred consumption is reduced.
Preferably, the cigarette weight detection system is calibrated in accordance with the first and second weights determined by the actual lengths of the preceding and following cigarettes in the preferred embodiment to minimize calibration errors.
Examples of two embodiments are given below:
taking the ZJ17E cigarette machine as an example, the preset weight value of the product is 666 mg, the production speed is 7000 pieces/min, the product is folded to about 112 pieces/second, and the circumference standard of the cigarette rod is 24.2 mm, namely the diameter is about 7.7 mm. For ease of understanding and computing presentation, 128 segments per double length rod, i.e., 64 segments per single length rod, are measured, with the single rod length specification set to 64 millimeters, i.e., 1 millimeter per sample point.
Tables 1 and 2 show the detection data of the preceding and following cigarettes, respectively, obtained by the detection methods of the first and prior art embodiments:
table 1: preceding cigarette bar detection data
Table 2: later cigarette bar detection data
According to a first embodiment:
according to the prior art, the total weight of the double rod is 1341.83 mg, the weight of the former rod is about 672.08 mg, and the weight of the latter rod is about 669.75 mg.
If according to the second embodiment, if the length l of the cut front cigarette rod obtained at the primary cutting station 1 Length l of the subsequent tobacco rod of 63.5 mm 2 64.5 mm. It follows that when a cut is made at the midpoint of the 64 th section, the first 0.5 mm portion of the 64 th section belongs to the preceding tobacco rod and the last 0.5 mm portion of the 64 th section belongs to the following tobacco rod, the weight of the preceding tobacco rod is the weight of the first 0.5 mm portions of the 1 st to 63 th sections and the 64 th section, and the weight of the following tobacco rod is the weight of the last 0.5 mm portion of the 64 th section and the weight of the 65 to 128 sections for the entire double length tobacco rod. Whereby:
in the calibration process, if the offline measurement result is W Sampling of the front path =662.1 mg, W Post sampling = 674.2 mg.
As can be seen from the above, the difference between the online detection result and the offline measurement result in the prior art is greater than the difference between the online detection result and the offline measurement result in the first embodiment, and the difference between the online detection result and the offline measurement result in the first embodiment is greater than the difference between the online detection result and the offline measurement result in the second embodiment. Compared with the prior art, the online detection result of the first embodiment is more accurate than that of the prior art; compared with the first embodiment, the on-line measurement result of the second embodiment can find the problem of the length of the cigarettes and calibrate the cigarette weight detection system more accurately.
To verify the effect of the second embodiment, a sample verification of cigarettes of preset weight (which is the basic function of the ZJ17E cigarette machine) is performed by sampling 100 cigarettes, and obtaining the samples: 1) Deviation degree of average value and preset weight value: 2) Standard deviation.
Table 3 shows the accuracy obtained with the second example and prior art. As can be seen from table 3, the second example has a significant decrease in both mean deviation and standard deviation, 32.6% and 12.6% respectively, compared to the prior art.
TABLE 3 Table 3
Example two
Based on the ultra-precise detection method, the application also provides an ultra-precise detection device for the weight of the cigarettes. As shown in fig. 6, the ultra-precise detection apparatus includes a first receiving module 610 and a calculating module 620.
The first receiving module 610 is configured to receive the density and the radius of a plurality of sampling points on a double-length tobacco rod, where the double-length tobacco rod includes a front tobacco rod and a back tobacco rod that are connected to each other, and the sampling point width of each sampling point is the same.
The calculation module 620 is configured to calculate a first weight of the preceding tobacco rod and a second weight of the following tobacco rod according to the density, the sampling point width, and the radius of all the sampling points.
Preferably, the calculation module 620 includes a partitioning module 6201 and a first weight calculation module 6202.
The dividing module 6201 is configured to take the first half of all the sampling points as sampling points of the front cigarette bar and the second half of all the sampling points as sampling points of the back cigarette bar, so that lengths of the front cigarette bar and the back cigarette bar are equal.
The first weight calculating module 6202 is configured to calculate a first weight according to the sampling point of the preceding tobacco rod and the width, density and radius of the sampling point, and calculate a second weight according to the sampling point of the following tobacco rod and the width, density and radius of the sampling point.
Preferably, the ultra-precise detection device further comprises a second receiving module 630, wherein the second receiving module 630 is configured to receive the second lengths of the front and rear cigarette rods as the actual lengths of the front and rear cigarette rods after the double-length cigarette rods are cut into the front and rear cigarette rods.
The calculating module 620 further includes a second weight calculating module 6203, where the second weight calculating module 6203 is configured to calculate the first weight according to the sampling point corresponding to the actual length of the previous tobacco rod and the corresponding density and radius thereof, and calculate the second weight according to the sampling point corresponding to the actual length of the subsequent tobacco rod and the corresponding density and radius thereof.
Example III
Based on the above, the application also provides a cigarette making machine, which comprises a cigarette weight detection system, wherein the cigarette weight detection system is used for executing the ultra-precise detection method.
Although specific embodiments of the present application have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (10)
1. An ultra-precise detection method for the weight of a cigarette is characterized by comprising the following steps:
receiving the density and the radius of a plurality of sampling points on a double-length cigarette bar, wherein the double-length cigarette bar comprises a front cigarette bar and a back cigarette bar which are connected with each other, and the sampling point width of each sampling point is the same;
and calculating the first weight of the front cigarette rod and the second weight of the back cigarette rod according to the density, the sampling point width and the radius of all the sampling points.
2. The ultra-precise detection method of the weight of cigarettes according to claim 1, wherein calculating a first weight of a preceding cigarette rod and a second weight of a subsequent cigarette rod specifically comprises:
taking the first half part of all the sampling points as the sampling points of the front cigarette bar and the second half part of all the sampling points as the sampling points of the back cigarette bar, so that the lengths of the front cigarette bar and the back cigarette bar are equal;
and calculating the first weight according to the sampling points of the front cigarette bar and the width, density and radius of the corresponding sampling points, and calculating the second weight according to the sampling points of the rear cigarette bar and the width, density and radius of the corresponding sampling points.
3. The ultra-precise detection method of the weight of cigarettes according to claim 1, further comprising:
receiving the second lengths of the front cigarette bar and the rear cigarette bar, which are obtained by cutting the double-length cigarette bar into the front cigarette bar and the rear cigarette bar, and taking the second lengths as the actual lengths of the front cigarette bar and the rear cigarette bar;
and the first weight is calculated according to the sampling point corresponding to the actual length of the preceding cigarette rod and the density and the radius corresponding to the sampling point, and the second weight is calculated according to the sampling point corresponding to the actual length of the following cigarette rod and the density and the radius corresponding to the sampling point.
4. The ultra-precise detection method of the weight of cigarettes according to claim 3, further comprising:
and calibrating the cigarette weight detection system according to the first weight and the second weight determined by the actual lengths of the front cigarette rod and the rear cigarette rod.
5. The ultra-precise detection method of the weight of the cigarettes according to claim 4, wherein the weight detection system of the cigarettes comprises a density detection sensor and a circumference detection sensor which are installed on the first cutting station and are respectively used for detecting the density and the radius of each sampling point;
wherein the first cutting station is used for cutting double-length cigarette rods.
6. The ultra-precise detection method of the weight of cigarettes according to claim 5, wherein the system for detecting the weight of cigarettes further comprises a length sensor on a primary slitting station for detecting a second length of a preceding cigarette rod and a subsequent cigarette rod;
the primary cutting station is used for cutting the double-length tobacco rod into a front tobacco rod and a rear tobacco rod.
7. The ultra-precise detection device for the weight of the cigarettes is characterized by comprising a first receiving module and a calculating module;
the first receiving module is used for receiving the density and the radius of a plurality of sampling points on the double-length cigarette bar, the double-length cigarette bar comprises a front cigarette bar and a back cigarette bar which are connected with each other, and the sampling point width of each sampling point is the same;
the calculation module is used for calculating the first weight of the front cigarette rod and the second weight of the back cigarette rod according to the density, the sampling point width and the radius of all the sampling points.
8. The ultraprecise detection device of a cigarette weight according to claim 7, wherein the calculation module comprises a dividing module and a first weight calculation module;
the dividing module is used for taking the first half part of all the sampling points as the sampling points of the front cigarette bar and taking the second half part of all the sampling points as the sampling points of the back cigarette bar, so that the lengths of the front cigarette bar and the back cigarette bar are equal;
the first weight calculation module is used for calculating the first weight according to the sampling points of the front cigarette bar and the width, the density and the radius of the corresponding sampling points, and calculating the second weight according to the sampling points of the rear cigarette bar and the width, the density and the radius of the corresponding sampling points.
9. The ultra-precise detection device of a cigarette weight according to claim 7, further comprising a second receiving module for receiving a second length of the front and rear cigarette rods as an actual length of the front and rear cigarette rods after the double cigarette rods are cut into the front and rear cigarette rods;
and the calculation module comprises a second weight calculation module, wherein the second weight calculation module is used for calculating the first weight according to the sampling points corresponding to the actual length of the front cigarette rod and the corresponding density and radius thereof, and calculating the second weight according to the sampling points corresponding to the actual length of the rear cigarette rod and the corresponding density and radius thereof.
10. A cigarette machine comprising a cigarette weight detection system for performing the ultra-precise detection method of claims 1-6.
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