Microwave moisture testing device

Abstract

The utility model discloses a microwave moisture testing device which is used for testing moisture content of materials and comprises a water testing device and a material bearing device, the water testing device is provided with a microwave antenna used for transmitting and receiving microwaves, and a transmission window is arranged on one side close to the material bearing device. And microwaves emitted by the microwave antenna penetrate through the transmission window, then irradiate the material carried by the material carrying device, are reflected and then are received by the microwave antenna, so that the moisture content in the material is tested. According to the microwave moisture testing device, the microwave antenna and the material are isolated through the transmission window, the antenna is prevented from being polluted by the material, the testing accuracy can be improved, and the testing result is more accurate.

Description

Technical Field

[0001] This application relates to the field of testing technology, and in particular to a microwave moisture testing device. Background Technology

[0002] Microwave moisture testing is a technique that uses microwave penetration to detect the moisture content in materials. It establishes a correlation between the power attenuation and phase shift changes of transmitted microwaves and the moisture content in the material. This technology plays an important role in the automation control of industrial processes and is applicable to the detection of materials such as coal, alumina, wood, grain, and pharmaceuticals.

[0003] The existing microwave moisture measurement technology involves placing a transmitting antenna and a receiving antenna on either side of a platform. The material is manually placed onto the platform. Microwaves emitted by the transmitting antenna penetrate the material and the platform, and are then received by the receiving antenna. The testing instrument establishes a correlation between the power attenuation and phase shift change of the transmitted microwaves and the moisture content of the material, and then calculates the moisture content.

[0004] However, existing microwave water measurement methods have the following problems:

[0005] 1. The test material is manually placed on the carrier platform and then analyzed. This method is suitable for moisture testing of static materials in a laboratory or offline manner, but not suitable for online analysis of materials.

[0006] 2. The microwave transmitting and receiving antennas are arranged on both sides of the platform, which makes antenna installation, alignment and maintenance troublesome, and they are easily contaminated, affecting the test results;

[0007] 3. The distance between the microwave transmitting antenna and the receiving antenna is relatively far. Microwaves need to penetrate the platform to be received. This causes changes in air temperature and humidity and the properties of the platform to have a significant impact on the sample test results.

[0008] 4. The microwave transmitting and receiving antennas were not isolated from the sample, which may cause the sample to contaminate the antennas and affect the test results. Utility Model Content

[0009] To address the aforementioned technical problems, the purpose of this utility model is to provide a microwave moisture testing device that can improve testing accuracy.

[0010] The technical solution provided by this utility model is as follows:

[0011] A microwave moisture testing device is used to test the moisture content of materials. It includes a moisture measuring device and a material carrying device. The moisture measuring device is equipped with a microwave antenna for emitting and receiving microwaves. A transmission window is provided on the side near the material carrying device so that the microwaves emitted by the microwave antenna pass through the transmission window and irradiate the material carried by the material carrying device. After reflection, the microwaves are received by the microwave antenna to realize the test of the moisture content in the material.

[0012] Preferably, the water measuring device includes a housing, and the microwave antenna is enclosed and placed inside the housing.

[0013] Preferably, one surface of the housing has an opening, and the transmissive window is mounted on the opening.

[0014] Preferably, the microwave antenna is an integrated transmitting and receiving antenna.

[0015] Preferably, the microwave antenna is integrated on the transmission window.

[0016] Preferably, the material carrying device is located below the water testing device and includes a conveying mechanism to continuously convey the material to the area below the transmission window for testing.

[0017] Preferably, the material carrying device further includes an inlet and an outlet located at the front and rear ends of the conveying mechanism, respectively, for allowing the material to fall from the inlet onto the conveying mechanism, be conveyed by the conveying mechanism to the area below the transmission window for testing, and then be discharged through the outlet after testing.

[0018] Preferably, the conveying mechanism includes a power mechanism and a transmission mechanism. The transmission mechanism is a belt drive mechanism. The power mechanism is connected to a drive wheel, and the drive wheel is driven to rotate through the power mechanism, so that the belt drives the material being carried to move.

[0019] Compared to existing technologies, this novel microwave moisture testing device isolates the microwave antenna from the material through a transmission window, preventing material contamination of the antenna and improving testing accuracy. Furthermore, the transmission window isolates the antenna from the material, reducing the need for microwaves to penetrate the platform before reception and minimizing external environmental interference. The integrated design of the transmitting and receiving antennas simplifies installation and maintenance. A conveyor mechanism enables online moisture testing of the material. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the microwave moisture testing device according to an embodiment of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0026] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0027] like Figure 1As shown, this embodiment of the invention provides a microwave moisture testing device for testing the moisture content of materials. Microwaves are high-frequency electromagnetic waves, and the attenuation and phase change that occur when they penetrate a medium are mainly determined by the dielectric constant and dielectric loss tangent of the medium. Water is a polar molecule, and its dielectric constant and loss tangent are much higher than those of general media. Therefore, by using microwaves to penetrate materials, the moisture content of the materials can be measured based on the attenuation of microwave power and the change in phase shift.

[0028] The microwave moisture testing device includes a moisture measuring device 1 and a material supporting device 2. In this embodiment, the material supporting device 2 is located below the moisture measuring device 1. Of course, in other embodiments, the material supporting device 2 can also be located at other positions on the moisture measuring device 1.

[0029] In this embodiment, the water content measuring device 1 includes a housing 11, a microwave antenna 12, and a transmission window 13. The housing 11 is rectangular in shape with an opening on its bottom surface. The microwave antenna 12 is used to transmit and receive microwaves and is enclosed within the housing 11. In this embodiment, the microwave antenna 12 is an integrated transmitting and receiving antenna, simplifying installation and maintenance. The transmission window 13 is mounted on the opening, allowing the microwaves emitted by the microwave antenna 12 to pass through the transmission window 13 and irradiate the material 3 carried by the material carrier device 2. After reflection, the microwaves are received by the microwave antenna 12, thus enabling the testing of the moisture content in the material 3. In this embodiment, the microwave antenna 12 is integrated into the transmission window 13, allowing them to be installed together on the opening for easier and more convenient installation and maintenance. Of course, the microwave antenna 12 and the transmission window 13 can also be designed and installed separately. The position of the opening and the transmission window 13 is corresponding to that of the material carrier device 2. The purpose is to place the transmission window 13 on the side close to the material carrier device 2. In other embodiments, if the material carrier device 2 is located in another position of the water measuring device 1, the position of the opening and the transmission window 13 will also be adjusted accordingly.

[0030] In this embodiment, the material carrying device 2 includes a conveying mechanism and an inlet 22 and an outlet 23 located at the front and rear ends of the conveying mechanism, respectively. The conveying mechanism is used to continuously convey the material 3 to the area below the transmission window 13 for testing. In this embodiment, the conveying mechanism includes a power mechanism (such as a motor, not shown) and a transmission mechanism. The transmission mechanism is a belt drive mechanism, and the power mechanism is connected to the drive wheel 211. The power mechanism drives the drive wheel 211 to rotate, causing the belt 212 to move the material 3 it carries. Of course, in other embodiments, the conveying mechanism can adopt other structural forms.

[0031] The feed inlet 22 and the discharge outlet 23 are used to allow the material 3 to fall from the feed inlet 22 onto the conveying mechanism, be conveyed by the conveying mechanism to the area below the transmission window 13 for testing, and then be discharged through the discharge outlet 23 after testing.

[0032] This embodiment also provides a microwave moisture testing method using the microwave moisture testing device described above. The method includes: material 3 falling from the feed inlet 22 onto the conveying mechanism; the conveying mechanism transporting material 3 to below the transmission window 13; microwaves emitted by the microwave antenna 12 passing through the transmission window 13 and irradiating the material 3 carried by the material carrier 2, being reflected and then received by the microwave antenna 12 to test the moisture content in material 3; and material 3 being discharged through the discharge outlet 23 after testing. Specifically, in this embodiment, the testing of the moisture content in material 3 includes: establishing a correlation between the power attenuation and phase shift change of the transmitted microwave and the moisture content in material 3, and then calculating the moisture content in material 3.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A microwave moisture testing device for testing the moisture content of materials, characterized in that, The device includes a water content measuring device and a material carrying device. The water content measuring device is equipped with a microwave antenna for emitting and receiving microwaves. A transmission window is provided on the side near the material carrying device, so that the microwaves emitted by the microwave antenna pass through the transmission window and irradiate the material carried by the material carrying device. After reflection, the microwaves are received by the microwave antenna to realize the test of the moisture content in the material.

2. The microwave moisture testing device as described in claim 1, characterized in that, The water measuring device includes a housing, and the microwave antenna is enclosed and placed inside the housing.

3. The microwave moisture testing device as described in claim 2, characterized in that, An opening is provided on one surface of the outer casing, and the transmissive window is mounted on the opening.

4. The microwave moisture testing device as described in claim 1, characterized in that, The microwave antenna is an integrated transmitting and receiving antenna.

5. The microwave moisture testing device as described in claim 1, characterized in that, The microwave antenna is integrated on the transmission window.

6. The microwave moisture testing device as described in any one of claims 1 to 5, characterized in that, The material carrying device is located below the water testing device and includes a conveying mechanism to continuously transport the material to the area below the transmission window for testing.

7. The microwave moisture testing device as described in claim 6, characterized in that, The material carrying device also includes an inlet and an outlet located at the front and rear ends of the conveying mechanism, respectively, for allowing the material to fall from the inlet onto the conveying mechanism, be conveyed by the conveying mechanism to the area below the transmission window for testing, and then be discharged through the outlet after testing.

8. The microwave moisture testing device as described in claim 7, characterized in that, The conveying mechanism includes a power mechanism and a transmission mechanism. The transmission mechanism is a belt drive mechanism. The power mechanism is connected to the drive wheel, and the drive wheel is driven to rotate through the power mechanism, so that the belt drives the material being carried to move.

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