Online detection device and detection method for moisture content of fragrance line of cigarette filter stick

Abstract

The invention relates to an online detection device and method for the moisture content of an aromatic line of a cigarette filter stick. The device comprises a guide assembly, one end of which is used for guiding an incense line impregnated with perfume from a perfume barrel, and the other end of which is used for guiding the incense line out to a filter stick forming cigarette gun; the guide assembly is used for folding the incense lines into a plurality of strands of non-intersecting incense lines and conducting the incense lines; the microwave resonant cavity is used for transmitting a microwave detection signal with a preset microwave frequency to an incense line area in the cavity; the radio frequency detection module is used for detecting a microwave response signal of the incense line area aiming at the microwave detection signal and acquiring a water content map of the incense line according to the microwave response signal; the data processing module is used for comparing the water content map of the incense line with a standard water content map corresponding to a preset microwave frequency to obtain the water content of the incense line in the incense line area; according to the water content of the incense lines in the incense line area and the length of the incense lines in the incense line area, the water content of the incense lines in the incense line area is obtained. The device can improve the detection accuracy of the water content.

Description

Technical Field

[0001] The present application relates to the technical field of tobacco detection, and in particular to an online detection device and method for the moisture content of a cigarette filter rod. Background Art

[0002] Fragrance filter rod flavoring technology is currently a widely used cigarette flavoring technology. Fragrance filter rods are made by adding yarn impregnated with fragrances during filter rod molding. They enhance flavor, retain moisture, and improve taste, making them suitable for all types of low-tar cigarette products. When producing flavor filter rods, the tensioned yarn is passed through a barrel filled with edible flavorings, allowing the yarn to absorb and fix the flavor components. During the smoking process, the fragrance thread is heated to release the aroma. The amount of flavor liquid absorbed by the yarn will directly affect the smell, taste, and even appearance of the corresponding cigarette product. For the same model of flavor filter rods, testing the moisture content of the fragrance thread is a method to determine the amount of flavor adsorption.

[0003] However, the current online method for detecting the moisture content of incense threads has the problem of low detection accuracy. Summary of the Invention

[0004] Based on this, it is necessary to provide an online detection device and method for the moisture content of a cigarette filter rod that can detect the moisture content of the cigarette filter with high accuracy to address the above technical problems.

[0005] An online detection device for the moisture content of a cigarette filter rod includes a microwave resonant cavity, a radio frequency detection module, a data processing module, and a guide component, wherein:

[0006] The guide assembly has one end for guiding the incense wire soaked in spices from the spice barrel, and the other end for guiding the incense wire to the filter rod forming pipe; the guide assembly is used to fold the incense wire into multiple non-intersecting incense wires and conduct the incense wire; wherein the folded incense wire passes through the microwave resonant cavity;

[0007] The microwave resonant cavity is used to transmit a microwave detection signal of a preset microwave frequency to the incense line area within the microwave resonant cavity;

[0008] The radio frequency detection module is used to detect the microwave response signal of the incense thread area to the microwave detection signal, and obtain the moisture content spectrum of the incense thread according to the microwave response signal;

[0009] The data processing module is used to compare the moisture content spectrum of the incense thread with the standard moisture content spectrum corresponding to the preset microwave frequency to obtain the moisture content of the incense thread in the incense thread area; and to obtain the moisture content of the incense thread in the incense thread area based on the moisture content of the incense thread in the incense thread area and the length of the incense thread in the incense thread area.

[0010] The above-mentioned online detection device for the moisture content of the incense thread of the cigarette filter rod folds the incense thread through a guide component, folding the incense thread into multiple non-intersecting strands, thereby exponentially increasing the effective length and material amount of the incense thread area in the microwave resonant cavity, and can significantly amplify the weak microwave signal changes, greatly improving the detection sensitivity of trace moisture differences in the incense thread and the accuracy of the final moisture content calculation.

[0011] In one embodiment, the guide assembly includes a plurality of guide rollers with grooves; the plurality of guide rollers with grooves are used to conduct the incense thread through the grooves, and the plurality of guide rollers with grooves are arranged according to preset positions so that the incense thread forms multiple strands of incense thread parallel to each other in the microwave resonance cavity.

[0012] In one embodiment, the guide assembly further includes an adjustment assembly for tensioning the incense thread according to a preset tension force.

[0013] In one embodiment, the adjustment component is further used to adjust the positions of the plurality of guide rollers to adjust the length of the folded portion of the incense thread.

[0014] In one embodiment, the adjustment component is further used to adjust the number of guide rollers that transmit the incense thread to adjust the number of folded strands of the incense thread.

[0015] In one embodiment, the positional relationship between the guide assembly and the microwave resonant cavity is configured so that the axis of the microwave resonant cavity is parallel to the multiple incense threads formed by folding the guide assembly.

[0016] In one embodiment, the detection device further includes a spice liquid detection module for detecting the components of the spice liquid in the spice barrel, obtaining the component ratio and characteristic frequency of each component, and sending the component ratio and characteristic frequency of each component to the data processing module;

[0017] The data processing module is further configured to send the characteristic frequency of the component as the preset microwave frequency to the microwave resonant cavity when the component proportion of the component is greater than a preset proportion threshold and the characteristic frequency of the component is greater than a preset frequency threshold.

[0018] In one embodiment, the radio frequency detection module is further used to couple and amplify the microwave response signal, and perform analog-to-digital conversion to obtain a moisture content spectrum of the incense thread.

[0019] In one embodiment, the guide assembly is also used to conduct the standard moisture content fragrance line;

[0020] The data processing module is further configured to send a target microwave frequency corresponding to the standard moisture content fragrance line to the microwave resonant cavity;

[0021] The microwave resonant cavity is further used to transmit a microwave detection signal of a target microwave frequency to the fragrance line area of ​​the standard moisture content fragrance line in the microwave resonant cavity;

[0022] The radio frequency detection module is further configured to detect a standard microwave response signal of the incense thread region of the standard moisture content incense thread to the microwave detection signal of the target microwave frequency, and obtain a moisture content map of the standard incense thread according to the standard microwave response signal;

[0023] The data processing module is further used to store the standard incense thread moisture content spectrum as the standard moisture content spectrum corresponding to the target microwave frequency.

[0024] A method for online detection of moisture content of a cigarette filter rod's incense string, applied to a data processing module in the above-mentioned device for online detection of moisture content of a cigarette filter rod's incense string, comprises:

[0025] Comparing the moisture content spectrum of the incense thread with the standard moisture content spectrum corresponding to the preset microwave frequency to obtain the moisture content of the incense thread in the incense thread area;

[0026] The moisture content of the incense thread in the incense thread area is obtained according to the moisture content of the incense thread in the incense thread area and the length of the incense thread in the incense thread area. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 Schematic diagram of the structure of an online detection device for moisture content of a cigarette filter rod in one embodiment;

[0029] Figure 2 A schematic diagram of the installation positions of the guide roller and the microwave resonant cavity in an online detection device for the moisture content of a cigarette filter rod in one embodiment;

[0030] Figure 3 Schematic diagram of a flow chart of an online detection method for moisture content of a cigarette filter rod in one embodiment;

[0031] Figure 4 This is a structural block diagram of an online detection device for moisture content of a cigarette filter rod in one embodiment;

[0032] Figure 5 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0033] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0035] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intervening element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc., if there is transmission of electrical signals or data between the connected objects.

[0036] As used herein, the singular forms "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include," "comprising," "having," and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Furthermore, the term "and / or" as used in this specification includes any and all combinations of the relevant listed items.

[0037] As described in the background technology, the online method for detecting the moisture content of incense threads in the prior art has the problem of low accuracy in detecting the moisture content of incense threads. The applicant has found through research that the reason for this problem is that the size of the incense threads is relatively thin and the overall moisture content is relatively low, which makes it difficult to distinguish the detection feature quantities. In addition, the yarn is made of flexible material and vibrates and deforms during the operation of the unit, making it difficult for the detection device to focus and capture the incense thread to be tested in order to accurately detect the moisture content of the incense thread.

[0038] Based on the above reasons, the present application provides an online detection device for the moisture content of a cigarette filter rod, which can improve the accuracy of the moisture content detection of the cigarette filter rod.

[0039] In one embodiment, Figure 1As shown, an online detection device for the moisture content of a cigarette filter rod is provided, comprising a microwave resonant cavity, a radio frequency detection module, a data processing module, and a guide component, wherein:

[0040] The above-mentioned guide assembly, one end of the above-mentioned guide assembly is used to introduce the incense wire impregnated with spices from the spice barrel, and the other end of the above-mentioned guide assembly is used to guide the incense wire to the filter rod forming cigarette gun; the above-mentioned guide assembly is used to fold the incense wire into multiple non-intersecting incense wires, and to conduct the above-mentioned incense wire; wherein, the folded incense wire passes through the microwave resonant cavity.

[0041] A scented thread can refer to a thread impregnated with fragrance. The thread can be a fiber bundle made of natural or chemical fibers. A scented thread is a crucial component of cigarette filters, carrying and slowly releasing fragrance.

[0042] Moisture content refers to the percentage of water in a scent string relative to its total mass. Moisture content is a key process parameter that influences the quality of a scent string, such as its fragrance release stability and physical strength.

[0043] In-line testing refers to real-time, non-destructive testing of materials (in this case, incense yarn) in continuous operation on the production line, without stopping the machine for sampling. This enables real-time monitoring and feedback control of the production process.

[0044] Among them, the filter rod forming gun can refer to a key component of the cigarette filter rod production equipment, which is used to wrap, shape and cut fiber bundles, incense threads (such as the incense threads described in this embodiment), wrapping paper and other materials into filter rod segments of specified length and shape.

[0045] The guide assembly is used to guide and guide the incense thread, ensuring a continuous and directional flow along the production line. Using specialized mechanical structures (such as guide wheels, chutes, and clamps), the guide assembly folds a single, continuous incense thread into multiple, non-intersecting strands. For example, the incense thread can be bent into a "U" or "S" shape, forming a bundle of two, three, or more parallel but separate strands. While folding the incense thread, the guide assembly ensures smooth and stable passage through the microwave resonant cavity. In this embodiment, the guide assembly folds the incense thread, primarily to significantly increase the total length of the incense thread passing through the microwave resonant cavity's detection zone (the incense thread area). Incense thread itself is very thin, and the change in the microwave signal caused by a single strand passing through the microwave resonant cavity can be very weak, making it difficult to accurately detect. Folding into multiple strands effectively concentrates more incense thread material within the limited detection space, significantly increasing the amplitude of the microwave signal (microwave response signal), thereby significantly improving detection sensitivity and accuracy. Among them, "non-intersection" is to ensure that each incense thread is independent, to avoid mutual adhesion affecting detection or complicating signal interpretation.

[0046] In this embodiment, the incense cord is conducted through the guide assembly so that the incense cord is in a continuous operation state, and then real-time, non-destructive detection can be achieved through other modules without stopping the machine for sampling, thereby finally achieving online detection.

[0047] The microwave resonant cavity is used to transmit a microwave detection signal of a preset microwave frequency to the incense line area within the microwave resonant cavity.

[0048] Microwaves can refer to electromagnetic waves within a certain frequency range. Microwaves can be significantly affected by water molecules, such as through amplitude attenuation and interdependence. A resonant cavity can be a specially designed metal cavity that generates and maintains an electromagnetic standing field wave pattern of a specific frequency. When a substance is placed in the resonant cavity, it disturbs the electromagnetic field within it. In this embodiment, the microwave resonant cavity is tuned to a specific preset frequency (the preset microwave frequency). Its primary function is to transmit a microwave detection signal of this frequency to an incense stick placed in a specific area within the cavity (the incense stick area). The absorption of microwave energy by water molecules causes a measurable change in the resonant characteristics of the resonant cavity.

[0049] The incense thread area may refer to the physical space within the microwave resonant cavity specifically used for placement and detection of the folded incense thread. The microwave signal primarily acts on the incense thread within this area. The microwave detection signal may refer to microwave energy of a specific frequency generated by the microwave resonant cavity and emitted into the incense thread area.

[0050] The radio frequency detection module is used to detect the microwave response signal of the incense thread area to the microwave detection signal, and obtain the moisture content spectrum of the incense thread according to the microwave response signal.

[0051] Radio frequency (RF) refers to electromagnetic waves within a specific range, and microwaves are also included in the higher frequency bands of RF. In this embodiment, the RF detection module is responsible for detecting changes in the electromagnetic field within the microwave resonant cavity after the microwave detection signal is emitted, namely the microwave response signal. This response signal directly reflects the degree of microwave energy absorption by the incense thread (primarily caused by moisture). The core task of the RF detection module is to convert physical electromagnetic field changes into electrical signals and, based on these signals, generate a moisture content map of the incense thread. This moisture content map can be a signal characteristic reflecting the overall moisture distribution characteristics of the incense thread.

[0052] The microwave response signal refers to a signal generated when the incense thread (especially the moisture in it) absorbs the energy of the microwave detection signal, causing changes in the electromagnetic field characteristics (such as resonant frequency, signal amplitude, and phase) within the resonant cavity. The RF detection module detects this changed signal.

[0053] The incense thread moisture profile refers to the data output by the RF detection module, which contains information about the moisture content (or distribution) within the incense thread region as reflected by the microwave response signal. This can be a time-varying curve (reflecting the moisture content changes throughout the incense thread) or a graph containing spatial distribution information.

[0054] The above-mentioned data processing module is used to compare the above-mentioned moisture content spectrum of the incense thread with the standard moisture content spectrum corresponding to the above-mentioned preset microwave frequency to obtain the moisture content of the incense thread in the above-mentioned incense thread area; and to obtain the moisture content of the incense thread in the above-mentioned incense thread area based on the moisture content of the incense thread in the above-mentioned incense thread area and the length of the incense thread in the above-mentioned incense thread area.

[0055] The data processing module first receives the incense thread moisture content map provided by the radio frequency detection module and compares it with a known standard moisture content map pre-established for the currently used preset microwave frequency. This standard map can be obtained through experimental calibration and represents the typical response pattern of incense thread to microwaves at a specific moisture content. The data processing module then calculates the moisture content of the incense thread within the incense thread area by comparing the real-time moisture content map with the standard moisture content map using a preset algorithm. After obtaining the moisture content, the data processing module combines the known length of the incense thread within the incense thread area (i.e., the total length of the multiple folded incense threads being tested) with the known length of the incense thread within the incense thread area and uses a specific calculation model to ultimately determine the moisture content of the incense thread within the incense thread area.

[0056] The standard moisture content spectrum can refer to a data spectrum obtained through pre-calibrated experiments. The standard moisture content spectrum records the typical microwave response signal characteristics generated by incense thread samples with different known moisture contents passing through the resonant cavity at a specific preset microwave frequency. The standard moisture content spectrum serves as a benchmark for the data processing module to compare and calculate moisture content.

[0057] In the above-mentioned online detection device for the moisture content of the incense thread of the cigarette filter rod, the incense thread is folded by a guide component, and the incense thread is folded into multiple non-intersecting strands, which exponentially increases the effective length and material amount of the incense thread area in the microwave resonant cavity. The weak microwave signal changes can be significantly amplified, greatly improving the detection sensitivity of trace moisture differences in the incense thread and the accuracy of the final moisture content calculation.

[0058] In one embodiment, Figure 2 As shown, the guide assembly 10 includes a plurality of guide rollers with grooves, such as Figure 2 The guide rollers 102, 104, 106 and 108 shown in FIG. 1 are used to guide the incense thread through the grooves. Figure 2As shown, the plurality of guide rollers with grooves are arranged in predetermined positions so that the incense thread forms a plurality of parallel incense threads in the microwave resonant cavity. Figure 2 Only four grooved guide rollers are shown. For the purpose of paralleling multiple incense lines, other numbers of grooved guide rollers can also be provided. Figure 2 The guide roller setting in the figure is only for example. In actual situation, multiple guide rollers with grooves can be set according to actual needs to make the folded incense lines parallel to each other.

[0059] The guide roller may refer to a cylindrical rotating component used to support and guide the movement path of the incense stick. The groove may refer to a groove machined on the cylindrical surface of the guide roller. The groove is used to accommodate and position the incense stick. The incense stick is embedded in the groove and runs. The sidewalls of the groove limit the lateral movement of the incense stick on the roller surface, ensuring that the incense stick strictly follows the preset path. The specific position of the incense stick on the roller surface is determined by the groove, which is the basis for the subsequent "parallel multi-strand" arrangement. The preset position may refer to the specific installation position and arrangement of these grooved guide rollers in space. The purpose is to accurately achieve the above-mentioned "folded multi-strand non-intersecting incense sticks" and the "multi-strand parallel incense sticks" in this embodiment. The multi-strand parallel incense sticks can refer to each strand of incense stick formed after folding, whose running directions are parallel to each other without crossing. The parallel arrangement can arrange multiple incense sticks in a regular and dense manner within the limited space of the microwave resonant cavity, maximizing the total length of the incense sticks passing through the detection area, thereby improving detection sensitivity. The parallel arrangement can also keep the relative position and posture of each incense thread constant in the microwave field, helping to ensure that the conditions under which the microwave field acts on each incense thread are as consistent as possible, reducing signal fluctuations caused by differences in the posture of the incense threads (such as crossing and entanglement leading to local accumulation), and improving the stability and repeatability of detection.

[0060] In this embodiment, multiple guide rollers with grooves are set according to preset positions, and the imported incense thread is repeatedly guided and folded in space to form multiple parallel-running incense thread segments. The grooves can ensure that the incense thread runs along the designed path to avoid deviation and slippage; the guide rollers are set according to preset positions to ensure that the multiple incense threads formed by folding are parallel to each other, meeting the requirements of the optimized detection form and achieving stable and reliable parallel folding.

[0061] In one embodiment, the guide assembly further includes an adjustment assembly for tensioning the incense cord to a preset tension. The adjustment assembly can be used to apply and maintain the preset tension during the conduction of the incense cord. The preset tension can refer to a pre-set tension value applied to the incense cord; this tension value can be determined based on the incense cord's material, strength, running speed, and the need for detection stability. For example, the guide assembly can include an adjustment assembly, which can include a tension sensor, a spring-loaded arm, a pneumatic / hydraulic cylinder, a servo-motor-driven slider, and so on. The adjustment assembly acts at one or more points along the incense cord's path (for example, one or more movable tension rollers within a guide roller system). This assembly monitors the tension in the incense cord in real time (via sensors) or passively maintains it (via springs, etc.). When the tension deviates from the preset tension, the adjustment assembly activates (e.g., moves the tension roller position), changes the length of the incense cord path, or applies force to restore the tension to the preset value (preset tension), thereby reducing vibration and deformation of the incense cord.

[0062] In this embodiment, constant tension is maintained by adjusting the components to prevent the incense threads from sag or become overly tense during conduction. Slack can cause the threads to wobble, touch, or even become tangled within the resonant cavity, seriously interfering with the detection signal. Excessive tension can break the threads or cause physical deformation (e.g., elongation), affecting the accuracy and veracity of moisture content measurements. By maintaining constant tension through the adjustment components, the multiple incense threads remain parallel, thereby improving detection accuracy.

[0063] In one embodiment, the adjustment assembly is further used to adjust the positions of the plurality of guide rollers to adjust the length of the folded portion of the incense thread.

[0064] For example, the adjustment assembly can use mechanical devices (such as slide rails, screws, or servo motors) to change the spatial position of one or more grooved guide rollers. After an operator or control system sets a target folding length, the adjustment assembly moves specific guide rollers to change the position of the "inflection point" of the incense string's folding path. By moving the guide rollers, the length of the incense string's path within the folding area is changed, thereby adjusting the length of the folded portion of the incense string within the microwave detection area.

[0065] In this embodiment, the position of multiple guide rollers can be adjusted through an adjustment assembly, thereby adjusting the length of the folded portion of the incense string. Increasing the folded length increases the length of the incense string within the detection area, thereby enhancing the amplitude of the microwave response signal and, in turn, improving the detection sensitivity to small changes in moisture content. Reducing the folded length reduces the detection sensitivity. Therefore, by adjusting the length of the folded portion of the incense string through the adjustment assembly, detection performance can be actively optimized.

[0066] In another embodiment, when the position of the guide roller is adjusted by the adjustment component, the adjustment component can control the tensioning force in a linked manner to ensure that the preset tensioning force required by the above embodiment can be maintained while changing the path length, thereby avoiding sudden changes in tension caused by length changes.

[0067] In one embodiment, the adjustment component is further used to adjust the number of guide rollers that transmit the incense thread, so as to adjust the number of folded strands of the incense thread.

[0068] Adjusting the number of guide rollers can refer to dynamically increasing or decreasing the number of grooved guide rollers involved in guiding and folding the incense string through a mechanism (e.g., a detachably mounted, removable swinging arm or a switchable roller assembly). The number of folded strands of the incense string can refer to the number of parallel strands formed after the incense string is folded (e.g., 2, 3, 4, etc.), which can be determined by the number and layout of the rollers involved in the folding process.

[0069] In this embodiment, the number of guide rollers for transmitting the incense thread is adjusted by adjusting the component to adjust the number of folded strands of the incense thread. When the number of strands is increased, the total length of the incense thread in the detection area can be effectively increased, thereby enhancing the detection sensitivity; when the number of strands is reduced, the sensitivity can be reduced to meet the needs of signal saturation scenarios; therefore, by adjusting the number of folded strands of the incense thread by adjusting the component, a wide range and high flexibility of detection sensitivity control can be achieved.

[0070] In one embodiment, the positional relationship between the guide assembly and the microwave resonant cavity is configured so that the axis of the microwave resonant cavity is parallel to the multiple incense threads formed by folding the guide assembly.

[0071] Among them, the axis of the microwave resonant cavity can refer to the main symmetry axis or propagation direction axis of the microwave energy field distribution designed inside the resonant cavity, and is also the direction of the optimal detection path that the incense line needs to pass through.

[0072] Specifically, when the microwave resonant cavity is fixedly installed, its axial direction has been determined. The installation position and direction of the guide assembly (including all rollers) need to ensure that the final output of the "multiple parallel incense wires" bundle entering the resonant cavity has an overall extension direction (the direction of each incense wire) parallel to the axis of the resonant cavity.

[0073] The field intensity distribution inside the microwave resonant cavity is usually optimal and most uniform along its axial direction. In this embodiment, the positional relationship between the guide component and the above-mentioned microwave resonant cavity is configured so that the axis of the above-mentioned microwave resonant cavity is parallel to the multiple incense wires formed by folding the above-mentioned guide component, and the parallel incense wire bundles are also extended along the axial direction of the microwave resonant cavity. Each incense wire can be exposed to the microwave field to the greatest extent, and each incense wire is subjected to uniform microwave action along its length. All parallel incense wires are in basically the same field strength environment, ensuring maximum microwave energy utilization and action uniformity, and improving detection accuracy and consistency.

[0074] In one embodiment, the above-mentioned detection device also includes a spice liquid detection module, which is used to detect the components of the spice liquid in the above-mentioned spice barrel, obtain the component ratio and characteristic frequency of each of the above-mentioned components, and send the component ratio and characteristic frequency of each of the above-mentioned components to the above-mentioned data processing module.

[0075] Among them, the components of the fragrance liquid may refer to the specific various chemical substances contained in the fragrance liquid. The component proportion may refer to the proportion of each component in the total mass of the fragrance liquid. The characteristic frequency may refer to the specific frequency at which each component absorbs microwave energy most strongly, which is determined based on the dielectric properties of the substance. For example, water molecules have a strong absorption peak at a specific frequency, and other organic solvents or fragrance molecules may also have absorption peaks in a specific frequency band. Specifically, the fragrance liquid detection module can directly receive user input, and the user can directly input the components present in the current fragrance liquid and the characteristic frequency of the components. The fragrance liquid detection module can also use a variety of analysis techniques to detect and identify the existing components and the characteristic frequency of the components from the current fragrance liquid.

[0076] The above-mentioned data processing module is also used to send the characteristic frequency of the above-mentioned component as the above-mentioned preset microwave frequency to the above-mentioned microwave resonant cavity when the component proportion of the above-mentioned component is greater than the preset proportion threshold and the characteristic frequency of the above-mentioned component is greater than the preset frequency threshold.

[0077] The preset percentage threshold can be a pre-set percentage value, which is used to filter out components with low content and minimal impact on the overall dielectric properties. Only components with a sufficiently large percentage are considered. The preset frequency threshold can be a pre-set frequency limit, which is used to filter out components with characteristic frequencies that are too low and outside the commonly used microwave frequency band.

[0078] For example, if only one component meets the requirements, its characteristic frequency can be directly used as the preset microwave frequency. If multiple components meet the requirements, the selection strategy may include: selecting the characteristic frequency of the component with the largest proportion; selecting the characteristic frequency of the component with the highest characteristic frequency (potentially the strongest absorption); selecting the characteristic frequency closest to the water absorption peak (if water is the main component, this is preferred). Alternatively, a weighted optimal frequency can be calculated by combining proportion and frequency.

[0079] The dielectric properties of fragrance threads (which influence microwave absorption) are not only determined by moisture but are also significantly affected by other components in the fragrance liquid (particularly solvents such as ethanol and propylene glycol). The ingredients and proportions of different fragrance formulas vary significantly. If the fragrance liquid contains a component with a distinct frequency characteristic and a significant proportion, microwaves with its characteristic frequency can be selected as the transmission signal. In this embodiment, the fragrance liquid detection module detects the proportions and characteristic frequencies of each of the aforementioned components and selects the characteristic frequency of the current major interfering component (with a large proportion and a high characteristic frequency) as the preset microwave frequency. If the characteristic frequency of a major component is selected, the system actually measures the strong absorption point of that component (which could be water or the main solvent). As long as the proportion of that component remains relatively stable, changes in its absorption signal can more sensitively reflect changes in moisture content (because changes in water content can affect the concentration or overall dielectric properties of that component).

[0080] In one embodiment, the radio frequency detection module is further used to couple and amplify the microwave response signal, and perform analog-to-digital conversion to obtain a moisture content spectrum of the incense thread.

[0081] Coupling is used to efficiently extract the weak microwave response signal from the microwave cavity while minimizing interference with the microwave field within the cavity. Amplification is used to increase the signal amplitude to a level that can be effectively processed by subsequent circuits (especially the analog-to-digital converter (ADC). Analog-to-digital conversion converts the analog microwave response signal (continuously varying voltage or current) after coupling and amplification into a digital signal (a discrete sequence of binary values) for subsequent digital signal processing and analysis. Analog-to-digital conversion bridges the gap between the physical world (analog signals) and the information world (digital data). Only by converting the signal into a digital signal can the powerful computing power of the data processing module be utilized to perform complex graph generation, comparative analysis, and moisture content calculation.

[0082] In this embodiment, the RF detection module uses two steps, coupling amplification and analog-to-digital conversion, to maximize the retention of signal authenticity through coupling, while solving the problem of signal weakness to ensure basic sensitivity; high-precision digitization is achieved through analog-to-digital conversion, laying the foundation for subsequent accurate analysis.

[0083] In one embodiment, the guide component is also used to conduct the standard moisture content incense line; the data processing module is also used to send the target microwave frequency corresponding to the standard moisture content incense line to the microwave resonant cavity; the microwave resonant cavity is also used to transmit a microwave detection signal of the target microwave frequency to the incense line area of ​​the standard moisture content incense line in the microwave resonant cavity; the radio frequency detection module is also used to detect the standard microwave response signal of the incense line area of ​​the standard moisture content incense line for the microwave detection signal of the target microwave frequency, and obtain the standard incense line moisture spectrum according to the standard microwave response signal; the data processing module is also used to store the standard incense line moisture spectrum as the standard moisture content spectrum corresponding to the target microwave frequency.

[0084] The "standard moisture content incense thread" may refer to an incense thread sample with a known, precise, and stable moisture content, serving as a reference for calibrating the detection device. The "target microwave frequency" may refer to the microwave operating frequency assigned to the microwave resonant cavity by the data processing module during this embodiment. The "standard microwave response signal" may refer to the microwave response signal detected by the radio frequency detection module when the standard moisture content incense thread passes through the microwave resonant cavity operating at the target microwave frequency. The "standard moisture content spectrum" may refer to the spectrum generated by the radio frequency detection module based on processing of the standard microwave response signal, representing the characteristic response of the standard moisture content incense thread at the target microwave frequency. The "standard moisture content spectrum" corresponding to the target microwave frequency may refer to the reference spectrum ultimately stored by the data processing module and associated with the target microwave frequency. In subsequent actual production testing (using the same frequency), the real-time moisture content spectrum detected will be compared with this stored reference spectrum to calculate the moisture content of the tested incense thread.

[0085] Specifically, the guide component guides the standard moisture content incense thread into its conduction path, the data processing module determines the target microwave frequency used for this calibration, and the data processing module sends the target microwave frequency to the microwave resonant cavity. The microwave resonant cavity adjusts its operating frequency to the received target microwave frequency. The guide component conducts the standard moisture content incense thread to the incense thread area within the microwave resonant cavity. The microwave resonant cavity transmits a microwave detection signal of the target microwave frequency to this area. The radio frequency detection module detects the standard microwave response signal generated by the standard incense thread area. The radio frequency detection module processes the detected standard microwave response signal to generate a standard incense thread moisture content map, and sends the standard incense thread moisture content map to the data processing module. The data processing module receives the standard incense thread moisture content map and stores this map as the standard moisture content map corresponding to the target microwave frequency (or updates it to cover the old reference map at this frequency).

[0086] In this embodiment, by using a physical standard sample (standard moisture content fragrance line) to re-measure and update the standard moisture content map, the drift of the system can be compensated in real time. The updated reference map reflects the response characteristics of the device state at the current moment, thereby ensuring long-term detection accuracy.

[0087] Based on the same inventive concept, in one embodiment, Figure 3 As shown, the embodiment of the present application further provides a method for online detection of moisture content of a cigarette filter string, which is applied to a data processing module in the above-mentioned device for online detection of moisture content of a cigarette filter string. The method comprises:

[0088] Step S202: Compare the moisture content spectrum of the incense thread with the standard moisture content spectrum corresponding to the preset microwave frequency to obtain the moisture content of the incense thread in the incense thread area.

[0089] Step S204, obtaining the moisture content of the incense thread in the incense thread area according to the moisture content of the incense thread in the incense thread area and the length of the incense thread in the incense thread area.

[0090] The solution to the problem provided by this method is similar to the solution described in the above-mentioned device. Therefore, the specific limitations in the above-mentioned embodiment of the method for online detection of moisture content of the fragrance thread of a cigarette filter rod can be found in the above-mentioned limitations on the device for online detection of moisture content of the fragrance thread of a cigarette filter rod, and will not be repeated here.

[0091] In one embodiment, the device for online detection of moisture content of a cigarette filter rod may specifically include:

[0092] A guide assembly, one end of which is used to guide the incense wire soaked in spices from the spice barrel, and the other end of which is used to guide the incense wire to the filter rod forming cigarette gun; the guide assembly is used to fold the incense wire into multiple non-intersecting incense wires and to conduct the incense wire; wherein the folded incense wire passes through the microwave resonant cavity.

[0093] Among them, the guide assembly includes multiple guide rollers with grooves; the multiple guide rollers with grooves are used to conduct the above-mentioned incense threads through the grooves, and the multiple guide rollers with grooves are arranged according to preset positions so that the above-mentioned incense threads form multiple parallel incense threads in the above-mentioned microwave resonance cavity.

[0094] The guide assembly further includes an adjustment assembly for tensioning the incense thread according to a preset tensioning force.

[0095] The above-mentioned adjustment component is also used to adjust the positions of the multiple above-mentioned guide rollers to adjust the length of the folded part of the above-mentioned incense thread.

[0096] The above-mentioned adjustment component is also used to adjust the number of guide rollers that transmit the above-mentioned incense thread to adjust the number of folded strands of the above-mentioned incense thread.

[0097] The positional relationship between the guide assembly and the microwave resonant cavity is configured so that the axis of the microwave resonant cavity is parallel to the multiple incense threads formed by folding the guide assembly.

[0098] The microwave resonant cavity is used to transmit a microwave detection signal of a preset microwave frequency to the incense line area in the above-mentioned microwave resonant cavity.

[0099] The radio frequency detection module is configured to detect a microwave response signal from the incense thread region in response to the microwave detection signal, and to obtain a moisture content profile of the incense thread based on the microwave response signal. The radio frequency detection module is further configured to couple and amplify the microwave response signal and perform analog-to-digital conversion on the signal to obtain a moisture content profile of the incense thread.

[0100] The data processing module is used to compare the moisture content spectrum of the above-mentioned incense thread with the standard moisture content spectrum corresponding to the above-mentioned preset microwave frequency to obtain the moisture content of the incense thread in the above-mentioned incense thread area; and to obtain the moisture content of the incense thread in the above-mentioned incense thread area based on the moisture content of the incense thread in the above-mentioned incense thread area and the length of the incense thread in the above-mentioned incense thread area.

[0101] The above-mentioned detection device also includes a spice liquid detection module, which is used to detect the components of the spice liquid in the above-mentioned spice barrel, obtain the component ratio and characteristic frequency of each of the above-mentioned components, and send the component ratio and characteristic frequency of each of the above-mentioned components to the above-mentioned data processing module; the above-mentioned data processing module is also used to send the characteristic frequency of the above-mentioned component as the above-mentioned preset microwave frequency to the above-mentioned microwave resonant cavity when the component ratio of the above-mentioned component is greater than the preset ratio threshold and the characteristic frequency of the above-mentioned component is greater than the preset frequency threshold.

[0102] In order to obtain the standard moisture content spectrum corresponding to the preset microwave frequency, the above-mentioned online detection device for the moisture content of the fragrance line of the cigarette filter rod can also be used for: the above-mentioned guide component is also used to conduct the standard moisture content fragrance line; the above-mentioned data processing module is also used to send the target microwave frequency corresponding to the above-mentioned standard moisture content fragrance line to the above-mentioned microwave resonant cavity; the above-mentioned microwave resonant cavity is also used to transmit a microwave detection signal of the target microwave frequency to the fragrance line area of ​​the standard moisture content fragrance line in the above-mentioned microwave resonant cavity; the above-mentioned radio frequency detection module is also used to detect the standard microwave response signal of the fragrance line area of ​​the above-mentioned standard moisture content fragrance line for the microwave detection signal of the above-mentioned target microwave frequency, and obtain the standard fragrance line moisture content spectrum according to the above-mentioned standard microwave response signal; the above-mentioned data processing module is also used to store the above-mentioned standard fragrance line moisture content spectrum as the standard moisture content spectrum corresponding to the above-mentioned target microwave frequency.

[0103] Based on the above-mentioned online detection device for the moisture content of the cigarette filter rod, the online detection method for the moisture content of the cigarette filter rod applied to the data processing module thereof may specifically include:

[0104] Step S1, comparing the moisture content spectrum of the incense thread with the standard moisture content spectrum corresponding to the preset microwave frequency to obtain the moisture content of the incense thread in the incense thread area.

[0105] Step S2, obtaining the moisture content of the incense thread in the above-mentioned incense thread area according to the moisture content of the incense thread in the above-mentioned incense thread area and the length of the incense thread in the above-mentioned incense thread area.

[0106] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0107] Based on the same inventive concept, embodiments of the present application also provide an online moisture content detection device for a filter rod for cigarettes, for implementing the aforementioned method for online moisture content detection of a filter rod. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the online moisture content detection device for a filter rod for cigarettes provided below can be found in the aforementioned method for online moisture content detection of a filter rod for cigarettes, and will not be further elaborated here.

[0108] In one embodiment, Figure 4 As shown, an online detection device 900 for the moisture content of a cigarette filter rod is provided, comprising: a graph comparison module 901 and a moisture content acquisition module 902, wherein:

[0109] The spectrum comparison module 901 is used to compare the moisture content spectrum of the incense thread with the standard moisture content spectrum corresponding to the preset microwave frequency to obtain the moisture content of the incense thread in the incense thread area.

[0110] The moisture content acquisition module 902 is used to obtain the moisture content of the incense thread in the above-mentioned incense thread area according to the moisture content of the incense thread in the above-mentioned incense thread area and the length of the incense thread in the above-mentioned incense thread area.

[0111] Each module in the aforementioned device for online detection of moisture content in cigarette filter rods can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a computer device's memory in the form of software, allowing the processor to call and execute the corresponding operations of each module.

[0112] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 5 As shown. The computer device includes a processor, a memory, and a network interface connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store online detection data of the moisture content of the cigarette filter thread. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a method for online detection of the moisture content of the cigarette filter thread is implemented.

[0113] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0114] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0115] Comparing the moisture content spectrum of the incense thread with the standard moisture content spectrum corresponding to the preset microwave frequency to obtain the moisture content of the incense thread in the incense thread area;

[0116] The moisture content of the incense thread in the above-mentioned incense thread area is obtained according to the moisture content of the incense thread in the above-mentioned incense thread area and the length of the incense thread in the above-mentioned incense thread area.

[0117] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0118] Comparing the moisture content spectrum of the incense thread with the standard moisture content spectrum corresponding to the preset microwave frequency to obtain the moisture content of the incense thread in the incense thread area;

[0119] The moisture content of the incense thread in the above-mentioned incense thread area is obtained according to the moisture content of the incense thread in the above-mentioned incense thread area and the length of the incense thread in the above-mentioned incense thread area.

[0120] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0121] Comparing the moisture content spectrum of the incense thread with the standard moisture content spectrum corresponding to the preset microwave frequency to obtain the moisture content of the incense thread in the incense thread area;

[0122] The moisture content of the incense thread in the above-mentioned incense thread area is obtained according to the moisture content of the incense thread in the above-mentioned incense thread area and the length of the incense thread in the above-mentioned incense thread area.

[0123] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), data processing logic devices based on quantum computing, and the like.

[0124] Throughout this specification, references to terms such as "some embodiments," "other embodiments," and "desired embodiments" indicate that a particular feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present application. The schematic descriptions of these terms throughout this specification do not necessarily refer to the same embodiment or example.

[0125] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0126] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An online detection device for moisture content of a cigarette filter rod, characterized in that: It includes a microwave resonant cavity, a radio frequency detection module, a data processing module and a guide component, wherein: The guide assembly has one end for guiding the incense wire soaked in spices from the spice barrel, and the other end for guiding the incense wire to the filter rod forming pipe; the guide assembly is used to fold the incense wire into multiple non-intersecting incense wires and conduct the incense wire; wherein the folded incense wire passes through the microwave resonant cavity; The microwave resonant cavity is used to transmit a microwave detection signal of a preset microwave frequency to the incense line area within the microwave resonant cavity; The radio frequency detection module is used to detect the microwave response signal of the incense thread area to the microwave detection signal, and obtain the moisture content spectrum of the incense thread according to the microwave response signal; The data processing module is used to compare the moisture content spectrum of the incense thread with the standard moisture content spectrum corresponding to the preset microwave frequency to obtain the moisture content of the incense thread in the incense thread area; and to obtain the moisture content of the incense thread in the incense thread area based on the moisture content of the incense thread in the incense thread area and the length of the incense thread in the incense thread area.

2. The detection device according to claim 1, characterized in that The guide assembly includes a plurality of guide rollers with grooves; the plurality of guide rollers with grooves are used to conduct the incense thread through the grooves, and the plurality of guide rollers with grooves are arranged according to preset positions so that the incense thread forms multiple strands of incense thread parallel to each other in the microwave resonance cavity.

3. The detection device according to claim 2, characterized in that The guide assembly also includes an adjustment assembly for tensioning the incense thread according to a preset tensioning force.

4. The detection device according to claim 3, characterized in that The adjustment component is also used to adjust the positions of the plurality of guide rollers to adjust the length of the folded portion of the incense thread.

5. The detection device according to claim 4, characterized in that The adjustment component is also used to adjust the number of guide rollers that transmit the incense thread to adjust the number of folded strands of the incense thread.

6. The detection device according to any one of claims 1 to 5, characterized in that: The positional relationship between the guide component and the microwave resonant cavity is configured so that the axis of the microwave resonant cavity is parallel to the multiple incense threads formed by folding the guide component.

7. The detection device according to any one of claims 1 to 5, characterized in that: The detection device further includes a spice liquid detection module for detecting the components of the spice liquid in the spice barrel, obtaining the component ratio and characteristic frequency of each component, and sending the component ratio and characteristic frequency of each component to the data processing module; The data processing module is further configured to send the characteristic frequency of the component as the preset microwave frequency to the microwave resonant cavity when the component proportion of the component is greater than a preset proportion threshold and the characteristic frequency of the component is greater than a preset frequency threshold.

8. The detection device according to any one of claims 1 to 5, characterized in that: The radio frequency detection module is also used to couple and amplify the microwave response signal, and perform analog-to-digital conversion to obtain a moisture content spectrum of the incense thread.

9. The detection device according to claim 1, characterized in that The guide assembly is also used to conduct the standard moisture content fragrance line; The data processing module is further configured to send a target microwave frequency corresponding to the standard moisture content fragrance line to the microwave resonant cavity; The microwave resonant cavity is further used to transmit a microwave detection signal of a target microwave frequency to the fragrance line area of ​​the standard moisture content fragrance line in the microwave resonant cavity; The radio frequency detection module is further configured to detect a standard microwave response signal of the incense thread region of the standard moisture content incense thread to the microwave detection signal of the target microwave frequency, and obtain a moisture content map of the standard incense thread according to the standard microwave response signal; The data processing module is further used to store the standard incense thread moisture content spectrum as the standard moisture content spectrum corresponding to the target microwave frequency.

10. A method for online detection of moisture content of cigarette filter rods, characterized in that: Applied to a data processing module, the data processing module being deployed in a detection device according to any one of claims 1 to 9; the method comprising: Comparing the moisture content spectrum of the incense thread with the standard moisture content spectrum corresponding to the preset microwave frequency to obtain the moisture content of the incense thread in the incense thread area; The moisture content of the incense thread in the incense thread area is obtained according to the moisture content of the incense thread in the incense thread area and the length of the incense thread in the incense thread area.

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