Cigarette moisture measuring device

Abstract

The utility model discloses a cigarette moisture measuring device which comprises a metal shell, a bottom plate, a microwave transmitting antenna, a microwave receiving antenna and a copper column radiating antenna which jointly form a microwave resonant cavity, generated microwaves are radiated to a cigarette placed on a first through hole in the metal shell through the copper column radiating antenna, and when the moisture of tobacco shreds changes, the microwave transmitting antenna transmits the microwaves to the cigarette through the copper column radiating antenna. The loss value received by the microwave receiving antenna is increased, and the moisture content value of the tobacco shreds is determined by calculating the loss value; the cigarette can be placed outside the metal shell for moisture detection, and does not pass through the interior of the cavity, so that the size and the transmission convenience of the transmission device are not influenced; and as the cavity is internally sealed, the moisture of the cigarette does not influence the service life of the assembly in the cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette moisture detection, in particular to a cigarette moisture measuring device. Background Art

[0002] The existing cigarette moisture detection methods include the following several kinds:

[0003] 1. Gravimetric method: This is a traditional moisture detection method, which determines the moisture content by measuring the weight change of the cigarette before and after heating. The disadvantage of this method is that it takes a long time, requires the cigarette to go through a drying process, and has high technical requirements for equipment and operators.

[0004] 2. Conductivity method: It measures the moisture content by using the conductivity of moisture in the cigarette. Although this method is faster than the gravimetric method, the conductivity method is limited by the physical structure and chemical composition of the cigarette, and may be affected by other ions, resulting in inaccurate measurement.

[0005] 3. Near-infrared spectroscopy method: It determines the moisture content by analyzing the absorption and reflection characteristics of the cigarette to near-infrared light. This method is fast and non-destructive, but the equipment cost is high, and complex spectral analysis technology is required.

[0006] 4. Karl Fischer method: This is a moisture determination method based on chemical reaction, which determines the moisture content by the consumption of reagents reacting with moisture. Although it has high accuracy, the operation is complex and it is not suitable for rapid detection.

[0007] Microwave resonator technology is a technology that uses the characteristics of the interaction between electromagnetic waves with microwave frequencies and substances to detect the characteristics of substances. The microwave resonator is very sensitive to the dielectric constant of substances, and the dielectric constant is closely related to the moisture content in substances. The microwave resonator has the following advantages for cigarette moisture measurement:

[0008] 1. Penetration ability: Microwaves can penetrate most non-metallic substances, including tobacco, which enables microwave technology to detect the moisture in cigarettes without damage.

[0009] 2. Fast response: The interaction speed between microwaves and substances is fast, and rapid measurement can be achieved, which is particularly important for rapid detection on the production line.

[0010] 3. High resolution: The microwave resonator can be designed to have a very high Q value (quality factor), which means that it can measure very small changes in dielectric constant very precisely, thereby providing high-resolution moisture measurement.

[0011] 4. Adaptability: Microwave resonator technology can adapt to different environmental conditions, including changes in temperature and humidity, which makes it more reliable in practical applications.

[0012] In the prior art, for the moisture density detection of cigarette rods, the cigarette rods pass through the cavity, and the design of the transmission device is restricted by the size inside the cavity. When quickly measuring the moisture of multiple cigarette rods, it will affect the overall layout.

[0013] Therefore, it is necessary to develop a cigarette rod moisture measuring device to solve the above problems. Utility Model Content

[0014] The purpose of the present utility model is to design a cigarette rod moisture measuring device to solve the above problems.

[0015] The present utility model realizes the above purpose through the following technical solutions:

[0016] A cigarette rod moisture measuring device includes:

[0017] A metal shell; the metal shell is formed into a cylindrical shape, and the first end of the metal shell is provided with an opening;

[0018] A bottom plate; the bottom plate is installed on the opening at the first end of the metal shell; a cylindrical cavity is formed between the bottom plate and the metal shell;

[0019] A microwave transmitting antenna;

[0020] A microwave receiving antenna; the microwave transmitting antenna and the microwave receiving antenna are arranged side by side on the bottom plate, and the acting ends of the microwave transmitting antenna and the microwave receiving antenna pass through the bottom plate and are placed in the cavity;

[0021] A copper column radiation antenna; a first through hole is provided in the middle of the second end of the metal shell, the first end of the copper column radiation antenna is installed in the first through hole, the second end of the copper column radiation antenna is arranged close to the center of the bottom plate, and the axis line of the copper column radiation antenna is placed between the microwave transmitting antenna and the microwave receiving antenna.

[0022] The beneficial effect of the present utility model lies in:

[0023] In this application, the metal shell, the bottom plate, the microwave transmitting antenna, the microwave receiving antenna, and the copper column radiation antenna jointly form a microwave resonator. The generated microwave is radiated to the cigarette rod placed on the first through hole on the metal shell through the copper column radiation antenna. When the moisture of the tobacco changes, the loss value received by the microwave receiving antenna will increase. By calculating the size of the loss value, the moisture content value of the tobacco is determined; this application can realize placing the cigarette rod outside the metal shell for moisture detection without passing through the inside of the cavity, so that the volume and transmission convenience of the transmission device are not affected; and because the cavity is in a sealed state, the moisture of the cigarette rod will not affect the service life of the components inside the cavity. Description of the Drawings

[0024] Figure 1 It is a structural schematic diagram of the present utility model;

[0025] Figure 2 is the sectional view of the present utility model Figure 1 (axial view);

[0026] Figure 3 is the sectional view of the present utility model Figure 2 (axial view)

[0027] Figure 4 is the top view of the present utility model;

[0028] Figure 5 is for the present utility model Figure 4 sectional view B-B in;

[0029] Figure 6 is the bottom view of the present utility model;

[0030] Figure 7 is the structural schematic diagram of the copper column radiation antenna in the present utility model;

[0031] Figure 8 is the structural schematic diagram of the first mounting seat and the second mounting seat in the present utility model;

[0032] Figure 9 is the mounting structural schematic diagram of the copper column radiation antenna in the present utility model;

[0033] In the figure: 1 - microwave transmitting antenna; 2 - microwave receiving antenna; 3 - copper column radiation antenna; 4 - cavity; 5 - metal housing; 51 - third mounting ring groove; 52 - fourth mounting ring groove; 53 - first through hole; 54 - first screw hole; 55 - second screw hole; 6 - bottom plate; 7 - first counterbore; 8 - first bolt; 9 - connecting screw hole; 10 - top cover; 11 - second counterbore; 12 - second bolt; 13 - third counterbore; 14 - third bolt; 15 - third screw hole; 16 - first mounting ring; 17 - first mounting seat; 18 - second through hole; 19 - second mounting ring; 20 - first mounting ring groove; 21 - third through hole; 22 - second mounting ring groove; 23 - second mounting seat; 24 - third mounting ring; 25 - mounting groove. Specific embodiments

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0036] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the utility model product is customarily placed during use, or the orientation or positional relationships commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0038] In addition, the terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0039] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, terms such as "disposed", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] The following will describe in detail the specific embodiments of the present utility model with reference to the drawings.

[0041] As Figures 1-6 shown, a cigarette moisture measuring device includes:

[0042] A metal housing 5; the metal housing 5 is formed into a cylindrical shape, and the first end of the metal housing 5 is provided with an opening;

[0043] A bottom plate 6; the bottom plate 6 is installed on the opening of the first end of the metal housing 5; a cylindrical cavity 4 is formed between the bottom plate 6 and the metal housing 5;

[0044] A microwave transmitting antenna 1;

[0045] Microwave receiving antenna 2; The microwave transmitting antenna 1 and the microwave receiving antenna 2 are installed side by side on the bottom plate 6, and the acting ends of the microwave transmitting antenna 1 and the microwave receiving antenna 2 pass through the bottom plate 6 and are placed in the cavity 4;

[0046] Copper column radiation antenna 3; A first through hole 53 is provided in the middle of the second end of the metal housing 5. The first end of the copper column radiation antenna 3 is installed in the first through hole 53. The second end of the copper column radiation antenna 3 is arranged close to the center of the bottom plate 6, and the axis line of the copper column radiation antenna 3 is placed between the microwave transmitting antenna 1 and the microwave receiving antenna 2.

[0047] As Figures 1-9 shown, the cigarette moisture measuring device further includes a top cover 10, a first mounting seat 17, and a second mounting seat 23. The first mounting seat 17 and the second mounting seat 23 are preferably made of rubber and plastic materials. A first mounting ring 16 is formed on the outer wall of the first end of the copper column radiation antenna 3. A fourth mounting ring groove 52 is provided on the first end of the metal housing 5 and above the first through hole 53. The outer side of the upper end of the first mounting seat 17 is connected with a second mounting ring 19. A second through hole 18 is provided in the first mounting seat 17. A first mounting ring groove 20 is provided on the inner wall of the upper end of the first mounting seat 17. The first mounting seat 17 is installed in the first through hole 53, and the second mounting ring 19 is installed in the fourth mounting ring groove 52; A third through hole 21 is provided at the center of the top cover 10. A second mounting ring groove 22 is provided below the third through hole 21 at the lower end of the top cover 10. The second mounting seat 23 is formed into a cylindrical structure with an open lower end and a cylindrical mounting groove 25 provided inside. The outer side of the lower end of the second mounting seat 23 is connected with a third mounting ring 24. The second mounting seat 23 is installed in the third through hole 21, and the third mounting ring 24 is installed in the second mounting ring groove 22. The first mounting ring 16 is installed in the second mounting ring groove 22 and is connected to the bottom of the second mounting seat 23 at the upper end. The upper end of the copper column radiation antenna 3 is placed in the second through hole 18 and the mounting groove 25.

[0048] As Figures 8-9 shown, the diameters of the second through hole 18 and the mounting groove 25 are the same.

[0049] As Figures 1-2 shown, a plurality of connection screw holes 9 for connecting with external devices are provided on the first end of the metal housing 5.

[0050] As Figure 1 and 3 shown, a plurality of first screw holes 54 are provided near the edge of the first end of the metal housing 5. A plurality of first counterbored holes 7 are correspondingly provided on the bottom plate 6. A plurality of first bolts 8 respectively pass through the plurality of first counterbored holes 7 and are screwed into the plurality of first screw holes 54.

[0051] As Figure 2As shown in the figure, a plurality of second screw holes 55 are provided near the edge of the second end of the metal housing 5, and a plurality of third screw holes 15 are provided in the middle of the second end of the metal housing 5. A plurality of second counterbored holes 11 are provided near the edge of the top cover 10, and a plurality of third counterbored holes 13 are provided in the middle of the top cover 10. A plurality of second bolts 12 respectively pass through the plurality of second counterbored holes 11 and are screwed into the plurality of second screw holes 55, and a plurality of third bolts 14 respectively pass through the plurality of third counterbored holes 13 and are screwed into the plurality of third screw holes 15.

[0052] As Figure 2 shown in the figure, a third mounting ring groove 51 is provided at the second end of the metal housing 5, and the top cover 10 is placed in the third mounting ring groove 51, and the top surface of the top cover 10 is flush with the end surface of the second end of the metal housing 5.

[0053] As Figure 5 shown in the figure, the metal housing 5 preferably has a diameter of 60 mm and a height of 29 mm.

[0054] In this application, the resonant frequency of the microwave resonator is simulated by HFSS, and the lowest loss value S1 of the microwave resonator is calculated. It is radiated to the surface of the cut tobacco through the copper column radiation antenna 3. When the moisture content of the cut tobacco changes, the loss value at the microwave receiving antenna 2 will increase. By calculating the magnitude of the loss value, the moisture content value of the cut tobacco can be determined. The microwave resonator in this application is designed with specific dimensions to ensure that the electromagnetic wave inside the cavity 4 can resonate at a specific microwave frequency, ensuring that the microwave can effectively penetrate the cut tobacco and be absorbed by the moisture therein. Considering the installation space and the best detection position, the designed frequency is selected between 3.0 - 6.0 GHZ.

[0055] The working principle of this application is as follows: Microwaves can penetrate substances, including cut tobacco. When microwaves pass through cut tobacco containing moisture, the moisture molecules will absorb the microwave energy, resulting in changes in the propagation speed and phase of the microwaves, which will change the resonant frequency or quality factor (Q value) of the resonator. By calculating these changes and deviations, the moisture content in the cut tobacco can be deduced.

[0056] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A cigarette moisture measurement device, characterized in that: include: Metal housing; The metal shell is formed into a cylindrical shape, and the first end of the metal shell is open; Base plate; The bottom plate is mounted on the first end opening of the metal shell; A cylindrical cavity is formed between the bottom plate and the metal shell; Microwave transmitting antenna; Microwave receiving antenna; The microwave transmitting antenna and the microwave receiving antenna are installed side by side on the bottom plate, and the active ends of the microwave transmitting antenna and the microwave receiving antenna pass through the bottom plate and are placed in the cavity; Copper column radiating antenna; a first through hole is provided in the middle of the second end of the metal shell, the first end of the copper column radiating antenna is installed in the first through hole, the second end of the copper column radiating antenna is arranged close to the center of the bottom plate, and the axis line of the copper column radiating antenna is placed between the microwave transmitting antenna and the microwave receiving antenna.

2. A cigarette moisture measurement device according to claim 1, characterized in that: The cigarette moisture measuring device also includes a top cover, a first mounting seat, and a second mounting seat. A first mounting ring is formed on the outer wall of the first end of the copper column radiating antenna, a fourth mounting ring groove is arranged on the first end of the metal shell and above the first through hole, a second mounting ring is connected to the outer side of the upper end of the first mounting seat, a second through hole is arranged in the first mounting seat, a first mounting ring groove is opened on the inner wall of the upper end of the first mounting seat, the first mounting seat is installed in the first through hole, and the second mounting ring is installed in the fourth mounting ring groove; a third through hole is arranged at the center of the top cover, a second mounting ring groove is arranged at the lower end of the top cover and below the third through hole, the second mounting seat is formed into a cylindrical structure with an opening at the lower end and a cylindrical mounting groove arranged inside, a third mounting ring is connected to the outer side of the lower end of the second mounting seat, the second mounting seat is installed in the third through hole, the third mounting ring is installed in the second mounting ring groove, the first mounting ring is installed in the second mounting ring groove, and the upper end is connected to the bottom of the second mounting seat, and the upper end of the copper column radiating antenna is placed in the second through hole and the mounting groove.

3. A cigarette moisture measurement device according to claim 2, characterized in that: The second through hole and the mounting groove have the same diameter.

4. The cigarette moisture measurement device according to claim 1, characterized in that: A plurality of connection screw holes for connecting with external equipment are arranged on the first end of the metal shell.

5. The cigarette moisture measurement device according to claim 1, characterized in that: A plurality of first screw holes are arranged near the edge of the first end of the metal shell, and a plurality of first countersunk holes are arranged correspondingly on the bottom plate. A plurality of first bolts pass through the plurality of first countersunk holes respectively and then are screwed into the plurality of first screw holes.

6. The cigarette moisture measurement device according to claim 1, characterized in that: A plurality of second screw holes are arranged near the edge of the second end of the metal shell, a plurality of third screw holes are arranged in the middle of the second end of the metal shell, a plurality of second countersunk holes are arranged near the edge on the top cover, a plurality of third countersunk holes are arranged in the middle of the top cover, a plurality of second bolts are respectively passed through the plurality of second countersunk holes and then screwed into the plurality of second screw holes, and a plurality of third bolts are respectively passed through the plurality of third countersunk holes and then screwed into the plurality of third screw holes.

7. The cigarette moisture measurement device according to claim 1, characterized in that: The second end of the metal shell is provided with a third mounting ring groove, the top cover is placed in the third mounting ring groove, and the top surface of the top cover is flush with the second end surface of the metal shell.

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