Composite filter stick quality detection method and system based on microwave technology

Abstract

The invention relates to the technical field of tobacco product production, in particular to a composite filter stick quality detection method and system based on the microwave technology, and the composite filter stick quality detection system based on the microwave technology is deployed on line on a filter stick forming machine, so that online detection and elimination actions are realized, and the quality of tobacco products is improved. When filter stick fixing pieces made of different materials and with different densities are encountered, different absorption and amplitude deviation changes are achieved, simple, rapid and accurate measurement of different sections of the filter stick can be achieved through microwave resonance method detection, and in this way, the quality problem of composite filter sticks aiming at defects in the prior art is solved; in the prior art, visual inspection is carried out by adopting an artificial lamp box backlight mode, the detection speed is slow, the labor intensity is high, and large-scale batch production is not facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco product production, and in particular to a composite filter rod quality detection method and system based on microwave technology. Background Art

[0002] With the gradual opening of domestic heat-not-burn cigarettes, various Chinese tobacco companies will successively launch free heat-not-burn cigarette brands, and the application of cigarette composite technology will increase. At the same time, cigarette filter rods have developed from single-function to multi-function. In high-end cigarettes, multi-component composite filter rods have begun to be used in large quantities. The development of composite filter rods that integrate the functions of harm reduction and tar reduction, flavor enhancement and flavor enhancement, and product differentiation has become one of the focuses of Chinese cigarette research. Multi-component composite filter rods are usually made of two to three different materials, cut and spliced ​​by a special composite filter rod forming machine.

[0003] However, during the production process, composite filter rods are often prone to quality defects such as phase drift, arrangement errors, gaps, etc., which seriously affect product quality. For quality problems of defective composite filter rods, visual inspection is carried out by artificial light box backlighting, which has a slow inspection speed and is labor-intensive, which is not conducive to large-scale batch production. Summary of the invention

[0004] The purpose of the present invention is to provide a composite filter rod quality detection method and system based on microwave technology, aiming to solve the technical problem that the quality problem of defective composite filter rods in the prior art all adopts artificial light box backlighting for visual inspection, which has slow detection speed, is labor-intensive, and is not conducive to large-scale batch production.

[0005] To achieve the above-mentioned purpose, the present invention adopts a composite filter rod quality detection system based on microwave technology, which includes a main control subsystem, a microwave subsystem and a filter rod transmission subsystem;

[0006] The microwave subsystem includes a microwave control module, a microwave signal generator module, a first microwave isolator, a resonant cavity, a second microwave isolator and a detection microwave amplifying circuit. The microwave control module and the filter rod transmission subsystem are both connected to the main control subsystem, the microwave signal generator is connected to the microwave control module, the detection microwave amplifying circuit is both connected to the second microwave isolator and the main control subsystem, and the detection microwave amplifying circuit is also connected to the microwave control submodule, and the resonant cavity is arranged between the first microwave isolator and the second microwave isolator.

[0007] Among them, the main control subsystem includes a network communication module, an AD sampling and identification module and a unit signal processing module, the network communication module is connected to the microwave control module, the AD sampling and identification module is connected to the detection microwave amplification circuit, and the unit signal processing module is connected to the AD sampling and identification module.

[0008] The filter rod transmission subsystem is used to transmit the composite filter rod to be tested and realize the function of the composite filter rod passing through the middle of the resonance cavity at a uniform speed.

[0009] Wherein, the microwave signal generator module is used to generate microwave signals.

[0010] Wherein, the microwave control module is used to control the microwave signal generator module to generate and receive signals.

[0011] The present invention also provides a composite filter rod quality detection method based on microwave technology, using the composite filter rod quality detection system based on microwave technology as described above,

[0012] The steps include:

[0013] The composite filter rod to be tested is transmitted based on the filter rod transmission subsystem;

[0014] At the same time, the microwave control module is started to issue a command, and the microwave generator module generates a microwave signal of a preset frequency and power;

[0015] The microwave signal is transmitted to the composite filter rod via the first microwave isolator, and part of the signal is absorbed after penetrating the filter rod, and part of the signal is reflected and transmitted and enters the detection microwave amplification circuit via the second microwave isolator to be converted into a level signal and transmitted to the AD sampling and identification module;

[0016] Until the AD sampling and identification module collects the microwave signal of a complete filter rod, the defective filter rod is analyzed through the identification and analysis algorithm, and a rejection signal is synchronously given to the unit signal processing module to complete the rejection action.

[0017] Among them, the microwave signal generated by the microwave generator module is 80G.

[0018] The present invention discloses a composite filter rod quality detection method and system based on microwave technology. First, the composite filter rod to be detected is transmitted based on the filter rod transmission subsystem. At the same time, the microwave control module is started to issue instructions, and the microwave generator module generates a microwave signal with a preset frequency and power. The microwave signal is transmitted to the composite filter rod through the first microwave isolator, and part of the signal is absorbed after penetrating the filter rod, and part of the signal is reflected and transmitted and enters the detection microwave amplification circuit through the second microwave isolator to be converted into a level signal and transmitted to the AD sampling and recognition module. Until the AD sampling and recognition module collects the microwave signal of a complete filter rod, the defective filter rod is analyzed through the recognition and analysis algorithm, and a rejection signal is synchronously given to the unit signal processing module to complete the rejection action, thereby completing the quality detection of the composite filter rod and completing the rejection. In this way, the quality problem of the defective composite filter rod in the prior art is solved. The visual inspection is performed by artificial light box backlighting, and the detection speed is slow, labor-intensive, and not conducive to large-scale batch production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a resonance curve diagram of the resonant cavity of the present invention.

[0021] Figure 2 It is a principle block diagram of the composite filter rod quality detection system based on microwave technology of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the filter rod transmission subsystem of the present invention.

[0023] Figure 4 It is a microwave acquisition circuit diagram of the AD sampling and identification module of the present invention.

[0024] Figure 5 It is a microwave signal control circuit diagram of the present invention.

[0025] 101-main control subsystem, 102-microwave subsystem, 103-filter rod transmission subsystem, 104-microwave control module, 105-microwave signal generator module, 106-first microwave isolator, 107-resonant cavity, 108-second microwave isolator, 109-detection microwave amplification circuit, 110-network communication module, 111-AD sampling identification module, 112-unit signal processing module. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0027] See also Figure 1 to Figure 5 ,in Figure 1 is a resonance curve diagram of the resonant cavity of the present invention, Figure 2 This is a principle block diagram of the composite filter rod quality detection system based on microwave technology of the present invention. Figure 3 is a schematic structural diagram of the filter rod transmission subsystem 103 of the present invention, Figure 4 is a microwave acquisition circuit diagram of the AD sampling and identification module 111 of the present invention, Figure 5 It is a microwave signal control circuit diagram of the present invention.

[0028] The present invention provides a composite filter rod quality detection system based on microwave technology, comprising a main control subsystem 101, a microwave subsystem 102 and a filter rod transmission subsystem 103;

[0029] The microwave subsystem 102 includes a microwave control module 104, a microwave signal generator module 105, a first microwave isolator 106, a resonant cavity 107, a second microwave isolator 108 and a detection microwave amplifying circuit 109. The microwave control module 104 and the filter rod transmission subsystem 103 are both connected to the main control subsystem 101, the microwave signal generator is connected to the microwave control module 104, the detection microwave amplifying circuit 109 is both connected to the second microwave isolator 108 and the main control subsystem 101, and the detection microwave amplifying circuit 109 is also connected to the microwave control submodule, and the resonant cavity 107 is arranged between the first microwave isolator 106 and the second microwave isolator 108;

[0030] The main control subsystem 101 includes a network communication module 110, an AD sampling identification module 111 and a unit signal processing module 112, wherein the network communication module is connected to the microwave control module 104, the AD sampling identification module 111 is connected to the detection microwave amplification circuit 109, and the unit signal processing module 112 is connected to the AD sampling identification module 111;

[0031] The filter rod transmission subsystem 103 is used to transmit the composite filter rod to be tested and realize the function of the composite filter rod passing through the middle of the resonance cavity 107 at a uniform speed;

[0032] The microwave signal generator module 105 is used to generate microwave signals;

[0033] The microwave control module 104 is used to control the microwave signal generator module 105 to generate and receive signals.

[0034] According to the present specific implementation, the composite filter rod to be inspected is firstly transmitted based on the filter rod transmission subsystem 103, and at the same time, the microwave control module 104 is started to issue an instruction, and the microwave generator module generates a microwave signal of preset frequency and power; the microwave signal is transmitted to the composite filter rod through the first microwave isolator 106, and part of the signal is absorbed after penetrating the filter rod, and part of the signal is reflected and transmitted and enters the detection microwave amplification circuit 109 through the second microwave isolator 108 to be converted into a level signal and transmitted to the AD sampling and identification module 111; until the AD sampling and identification module 111 collects the microwave signal of a complete filter rod, the defective filter rod is analyzed through the identification and analysis algorithm, and a rejection signal is synchronously given to the unit signal processing module 112 to complete the rejection action, thereby completing the quality inspection of the composite filter rod and completing the rejection, thereby solving the quality problem of the defective composite filter rod in the prior art, which adopts the artificial light box backlight method for visual inspection, and its detection speed is slow, labor-intensive, and is not conducive to large-scale batch production.

[0035] The present invention also provides a composite filter rod quality detection method based on microwave technology, using the composite filter rod quality detection system based on microwave technology as described above,

[0036] The steps include:

[0037] S101, transmitting the composite filter rod to be detected based on the filter rod transmission subsystem 103;

[0038] According to this specific embodiment, the filter rod transmission subsystem 103 can realize the function of allowing the composite filter rod to pass through the middle of the resonance cavity 107 at a uniform speed.

[0039] S102, at the same time, the microwave control module 104 is started to issue a command, and the microwave generator module generates a microwave signal of a preset frequency and power;

[0040] According to this specific implementation, the microwave signal generated by the microwave generator module is 80G.

[0041] S103, the microwave signal is transmitted to the composite filter rod via the first microwave isolator 106, and part of the signal is absorbed after penetrating the filter rod, and part of the signal is reflected and transmitted and enters the detection microwave amplification circuit 109 via the second microwave isolator 108 to be converted into a level signal and transmitted to the AD sampling and identification module 111;

[0042] For this specific implementation, the first microwave isolator 106 and the second microwave isolator 108 are also called unidirectional devices, which are devices that transmit electromagnetic waves in one direction, and are non-reciprocal two-port microwave ferrite devices. When the electromagnetic wave is transmitted in the forward direction, all the power can be fed to the load, and the reflected wave from the load is greatly attenuated. This unidirectional transmission characteristic can be used to isolate the influence of load changes on the signal source.

[0043] S104, until the AD sampling and identification module 111 collects the microwave signal of a complete filter rod, the defective filter rod is analyzed through the identification and analysis algorithm, and a rejection signal is synchronously given to the unit signal processing module 112 to complete the rejection action.

[0044] The composite filter rod quality detection method and system based on microwave technology of the present invention are used. First, the composite filter rod to be detected is transmitted based on the filter rod transmission subsystem 103. At the same time, the microwave control module 104 is started to issue a command, and the microwave generator module generates a microwave signal with a preset frequency and power; the microwave signal is transmitted to the composite filter rod through the first microwave isolator 106, and part of the signal is absorbed after penetrating the filter rod, and part of the signal is reflected and transmitted and enters the detection microwave amplification circuit 109 through the second microwave isolator 108 to be converted into a level signal and transmitted to the AD sampling and identification module 111; until the AD sampling and identification module 111 collects the microwave signal of a complete filter rod, the defective filter rod is analyzed through the identification and analysis algorithm, and a rejection signal is synchronously given to the unit signal processing module 112 to complete the rejection action, thereby completing the quality detection of the composite filter rod and completing the rejection. In this way, the quality problem of the composite filter rod with defects in the prior art is solved. The visual inspection is performed by artificial light box backlighting, and the detection speed is slow, labor-intensive, and not conducive to large-scale batch production.

[0045] By deploying the composite filter rod quality detection system based on microwave technology online on the filter rod forming machine, online detection and rejection can be achieved. When encountering filter rod firmware of different materials and densities, with different absorption and amplitude offset changes, microwave resonance detection can achieve simple, fast and accurate measurement of different sections of the filter rod.

[0046] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A composite filter rod quality detection system based on microwave technology, characterized in that: It includes main control subsystem, microwave subsystem and filter rod transmission subsystem; The microwave subsystem includes a microwave control module, a microwave signal generator module, a first microwave isolator, a resonant cavity, a second microwave isolator and a detection microwave amplifying circuit. The microwave control module and the filter rod transmission subsystem are both connected to the main control subsystem, the microwave signal generator is connected to the microwave control module, the detection microwave amplifying circuit is both connected to the second microwave isolator and the main control subsystem, and the detection microwave amplifying circuit is also connected to the microwave control submodule, and the resonant cavity is arranged between the first microwave isolator and the second microwave isolator.

2. The composite filter rod quality detection system based on microwave technology according to claim 1, characterized in that: The main control subsystem includes a network communication module, an AD sampling and identification module and a unit signal processing module. The network communication module is connected to the microwave control module, the AD sampling and identification module is connected to the detection microwave amplification circuit, and the unit signal processing module is connected to the AD sampling and identification module.

3. The composite filter rod quality detection system based on microwave technology according to claim 2, characterized in that: The filter rod transmission subsystem is used to transmit the composite filter rod to be tested and realize the function of the composite filter rod passing through the middle of the resonance cavity at a uniform speed.

4. The composite filter rod quality detection system based on microwave technology according to claim 3, characterized in that: The microwave signal generator module is used to generate microwave signals.

5. The composite filter rod quality detection system based on microwave technology according to claim 4, characterized in that: The microwave control module is used to control the microwave signal generator module to generate and receive signals.

6. A composite filter rod quality detection method based on microwave technology, using the composite filter rod quality detection system based on microwave technology as claimed in claim 5, characterized in that: The steps include: The composite filter rod to be tested is transmitted based on the filter rod transmission subsystem; At the same time, the microwave control module is started to issue a command, and the microwave generator module generates a microwave signal of a preset frequency and power; The microwave signal is transmitted to the composite filter rod via the first microwave isolator, and part of the signal is absorbed after penetrating the filter rod, and part of the signal is reflected and transmitted and enters the detection microwave amplification circuit via the second microwave isolator to be converted into a level signal and transmitted to the AD sampling and identification module; Until the AD sampling and identification module collects the microwave signal of a complete filter rod, the defective filter rod is analyzed through the identification and analysis algorithm, and a rejection signal is synchronously given to the unit signal processing module to complete the rejection action.

7. The composite filter rod quality detection method based on microwave technology according to claim 6, characterized in that: The microwave signal generated by the microwave generator module is 80G.

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