CN220961301U - Portable reflected microwave gypsum board moisture content measuring device - Google Patents
Portable reflected microwave gypsum board moisture content measuring device Download PDFInfo
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- CN220961301U CN220961301U CN202322763581.1U CN202322763581U CN220961301U CN 220961301 U CN220961301 U CN 220961301U CN 202322763581 U CN202322763581 U CN 202322763581U CN 220961301 U CN220961301 U CN 220961301U
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- spiral ring
- gypsum board
- measuring device
- microwave sensor
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 35
- 239000010440 gypsum Substances 0.000 title claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 22
- 239000010935 stainless steel Substances 0.000 claims abstract description 22
- 239000000919 ceramic Substances 0.000 claims abstract description 13
- 238000004806 packaging method and process Methods 0.000 claims abstract description 13
- 230000010355 oscillation Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 8
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The portable reflected microwave gypsum board water content measuring device belongs to the field of microwave application, and comprises a stainless steel cylinder; ceramic packaging sheets and rear covers respectively arranged at the front end and the rear end of the stainless steel cylinder; the horn antenna cover is fixed on the front side of the microwave sensor, the narrow opening of the horn antenna cover is tightly attached to the microwave sensor, and the wide opening of the horn antenna cover faces the measured material; the spiral ring comprises an inner spiral ring and an outer spiral ring, the inner spiral ring is fixed on the rear side of the microwave sensor, the outer spiral ring is glued on the inner wall of the stainless steel cylinder, and the inner spiral ring is meshed with the outer spiral ring; and the moisture signal display control terminal is connected with the front instrument amplifying circuit and the temperature and humidity sensor. Through installing the horn antenna housing at microwave sensor front end, make microwave sensor still can receive the reflection signal of higher intensity when keeping away from the measured material surface, increased the area of microwave measurement cross-section under the prerequisite of guaranteeing microwave sensor sensitivity, effectively improved the accuracy of test result when measuring the uneven measured material of surface moisture distribution.
Description
Technical Field
The utility model belongs to the technical field of microwave application, and mainly relates to a portable device for measuring the moisture content of a reflective microwave gypsum board.
Background
At present, the reflection type microwave water-containing device on the market often needs to be close to the tested materials as much as possible during testing so as to obtain stronger signals and reduce noise interference, thereby ensuring the measurement accuracy. But this results in a very small cross-sectional area of the microwave signal measured on the surface of the material being measured. When measuring objects with uneven water distribution such as gypsum boards, the water content of the gypsum boards cannot be represented by the single measurement result, and the actual water content of the gypsum boards can be accurately obtained by measuring the water content of the gypsum boards at different positions for multiple times and taking the average value of the results.
Disclosure of utility model
In order to solve the problems in the prior art, the utility model provides a portable device for measuring the water content of a reflective microwave gypsum board.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
The portable device for measuring the water content of the reflective microwave gypsum board comprises:
a stainless steel cylinder;
Ceramic packaging sheets and rear covers respectively arranged at the front end and the rear end of the stainless steel cylinder;
the horn antenna housing, the microwave sensor, the spiral ring, the front instrument amplifying circuit and the temperature and humidity sensor are all arranged in the stainless steel cylinder; the horn antenna cover is fixed on the front side of the microwave sensor, the narrow opening of the horn antenna cover is tightly attached to the microwave sensor, and the wide opening of the horn antenna cover faces to the measured material; the spiral ring comprises an inner spiral ring and an outer spiral ring, the inner spiral ring is fixed at the rear side of the microwave sensor, the outer spiral ring is glued on the inner wall of the stainless steel cylinder, and the inner spiral ring and the outer spiral ring are meshed with each other;
And the moisture signal display control terminal is connected with the front instrument amplifying circuit and the temperature and humidity sensor.
Further, the wall thickness of the stainless steel cylinder is 3-7 mm, and the outer diameter is 75-120 mm.
Further, the thickness of the ceramic packaging sheet is 4-10 mm, and the diameter is 70-110 mm.
Further, the diameter of the wide opening of the horn antenna housing is 69-109 mm.
Further, the frequency range of the microwave local oscillation signal generated by the microwave sensor is 2.4-11 GHz, the radiation power is 5-50 mw, and the working voltage is 5V.
Further, the microwave sensor transmits microwave signals and receives reflected echo signals, and the transmission angle and caliber of the microwave sensor are related to the distance between the wide opening of the horn antenna housing and the measured material.
Further, the external diameter of the spiral ring is 70-110 mm, and the adjustable length is 10-50 mm.
Further, the front-back adjustable distance of the microwave sensor is 10-50 mm by adjusting the spiral ring rotation.
Further, the moisture signal display control terminal is realized by a singlechip and a touch control display screen, the singlechip is used for signal subsequent processing and water content calculation, and the touch control display screen is used for displaying the water content.
The beneficial effects of the utility model are as follows:
According to the portable reflection microwave gypsum board water content measuring device provided by the utility model, the horn antenna housing is arranged at the front end of the microwave sensor, so that microwave signals received and transmitted by the microwave sensor are converged when passing through the horn antenna housing, the microwave energy density in front of the microwave sensor is improved, so that the microwave sensor can still receive high-intensity reflection signals containing the water content information of the microwave sensor when being far away from the surface of a measured material, the distance between the microwave sensor and the measured material is increased by adjusting the spiral ring on the premise of ensuring the sensitivity of the microwave sensor, the area of a microwave measuring section is further increased, the single measuring result is more close to the real water content of the measured material, and the accuracy of the measuring result when the measured material with uneven water content distribution on the surface is effectively improved.
In addition, the utility model has the advantages of simple structure, high measuring speed, touch screen control and display, and the like.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the portable reflective microwave gypsum board moisture content measuring device of the utility model.
Fig. 2 is a schematic diagram of the internal structure of the portable reflective microwave gypsum board moisture content measuring device of the present utility model.
FIG. 3 is a graph showing the voltage signal as a function of the water content of the gypsum board.
In the figure, 1, measured materials, 2, ceramic packaging sheets, 3, a stainless steel cylinder, 4, a horn-shaped antenna housing, 5, a microwave sensor, 6, a spiral ring, 7, a front instrument amplifying circuit, 8, a temperature and humidity sensor, 9, a rear cover, 10 and a moisture signal display control terminal.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the portable device for measuring the moisture content of the reflective microwave gypsum board provided by the utility model mainly comprises: the device comprises a measured material 1, a ceramic packaging piece 2, a stainless steel cylinder 3, a horn-shaped antenna housing 4, a microwave sensor 5, a spiral ring 6, a front instrument amplifying circuit 7, a temperature and humidity sensor 8, a rear cover 9 and a moisture signal display control terminal 10.
Wherein the tested material 1 is gypsum board without metal impurities. The ceramic packaging piece 2 is a round ceramic packaging piece, the ceramic packaging piece 2 is fixed at the front end of the stainless steel cylinder 3, and the ceramic packaging piece 2 is tightly attached to the tested material 1 so as to achieve high sensitivity; the rear cover 9 is fixed at the rear end of the stainless steel cylinder 3, and the horn antenna housing 4, the microwave sensor 5, the spiral ring 6, the front instrument amplifying circuit 7 and the temperature and humidity sensor 8 are all arranged inside the stainless steel cylinder 3. The horn antenna housing 4 is fixed on the front side of the microwave sensor 5 through screws, the narrow opening of the horn antenna housing 4 is tightly attached to the microwave sensor 5, and the wide opening of the horn antenna housing 4 is opposite to the measured material 1. The microwave sensor 5 is used for transmitting microwaves and receiving reflected echo signals, and the transmitting angle and caliber of the microwave sensor are related to the distance between the wide opening of the horn antenna housing 4 and the measured material 1. The spiral ring 6 comprises an inner spiral ring and an outer spiral ring, the whole stainless steel material is adopted, the inner spiral ring is fixed on the rear side of the microwave sensor 5 through screws, the outer spiral ring is adhered to the inner wall of the stainless steel cylinder 3 through adhesion, and the inner spiral ring and the outer spiral ring are meshed with each other. In the device debugging stage, according to the different fields of the device application, the internal spiral ring needs to be manually rotated in advance to adjust the distance between the microwave sensor 5 and the tested material 1, and then the distance between the wide opening of the horn antenna housing 4 and the tested material 1 is adjusted. After the position of the microwave sensor 5 reaching the optimal measurement sensitivity is determined, the internal and external spiral rings of the spiral ring 6 are fixed by screws, so that the position of the microwave sensor 5 is fixed, and meanwhile, the pre-meter amplifying circuit 7 needs to be zeroed and the amplification factor is adjusted.
In addition, the front-mounted instrument amplification circuit 7 and the temperature and humidity sensor 8 are both arranged on the inner wall of the rear side of the stainless steel cylinder 3, the front-mounted instrument amplification circuit 7 and the temperature and humidity sensor 8 are both connected with the moisture signal display control terminal 10, the microwave sensor 5 emits microwaves with the frequency of 2.4-11GHz, and the echo signals reflected by the measured material 1 are mixed with the microwave local oscillation signals to output direct-current mixed voltage signals containing moisture information of the measured material 1; after the direct current mixing voltage signal output by the microwave sensor 5 is zeroed and amplified by the front-mounted instrument amplifying circuit 7, the direct current mixing voltage signal and the environment temperature and humidity direct current signal output by the temperature and humidity sensor 8 are transmitted to the moisture signal display control terminal 10, the moisture signal display control terminal 10 carries out subsequent processing on the signals, and a touch display screen is arranged at the front end panel of the moisture signal display control terminal 10, so that the moisture content of the measured material 1 is displayed on the touch display screen of the moisture signal display control terminal 10. Wherein, the direct current mixed voltage signal output by the microwave sensor 5 is modulated into a variable voltage signal after being zeroed and amplified by the front-end instrument amplifying circuit 7, and the variable range of the direct current mixed voltage signal is modulated within the range of 0-5V.
The moisture signal display control terminal 10 can be realized by a singlechip and a touch control display screen, a direct current mixing voltage signal output by the microwave sensor 5 is zeroed and amplified by the front-end instrument amplifying circuit 7, the signal is input into the moisture signal display control terminal 10, then is sent to the singlechip and is subjected to software filtering, and then is converted into a corresponding moisture content value after being subjected to internal scaling operation together with an environment temperature and humidity direct current signal input into the singlechip by the temperature and humidity sensor 8, and is driven by the singlechip and displayed on the serial touch display screen.
The internal scaling operation method can be used for branching linear scaling and nonlinear scaling, and is specifically as follows: when in linear calibration, the water content of the measured material 1 is set to be changed between 0 and max percent, if the collected voltage signal is 5V, the output is displayed as the water content max percent, if the collected voltage signal is 0V, the output is displayed as the water content 0 percent, and the rest signals output the water content according to the linear proportion; for some tested materials 1, the mixed frequency voltage signals and the water content of the tested materials 1 are in a nonlinear relation, calibration is needed in a measurement and debugging stage, the corresponding relation between each voltage signal between 0 and 5V output by a pre-meter amplifying circuit 7 and the water content value of the tested materials 1 is tested, the functional relation between the mixed frequency voltage signals and the water content of the tested materials 1 is calculated by fitting an upper computer, and then the functional relation is written into a singlechip, so that the water content of the tested materials 1 can be calculated by the singlechip after the voltage signals are input into the singlechip during measurement.
Specifically, the portable reflection microwave gypsum board water content measuring device provided by the utility model has the following typical size parameters:
the wall thickness of the stainless steel cylinder 3 is 3-7 mm, and the outer diameter is 75-120 mm.
The thickness of the ceramic packaging sheet 2 is 4-10 mm, and the diameter is 70-110 mm.
The horn antenna housing 4 faces the wide mouth diameter of the measured material 1 by 69-109 mm.
In order to ensure that the device works stably, a plane antenna structure integrating microwave transmission and reception is selected as the microwave sensor 5, so that the transmission of a microwave local oscillator signal, the reception of an echo signal and the mixing output are realized. The microwave sensor 5 outputs a direct current mixing voltage signal, and the signal needs to be processed, so that the calibration of moisture is realized, and the measurement control requirements of different industrial applications are met. The frequency range of the microwave local oscillation signal generated by the microwave sensor 5 is 2.4-11 GHz, the radiation power is 5-50 mw, and the working voltage is 5V.
The external diameter of the spiral ring 6 is 70-110 mm, and the adjustable length is 10-50 mm.
The adjustable distance between the front and the back of the microwave sensor 5 can be between 10mm and 50mm by adjusting the rotation of the spiral ring 6.
Example 1: water content determination of Standard plasterboard
In this example, the moisture content of a 9.5mm standard gypsum board was measured. The method comprises the following steps:
Prior to testing, a standard gypsum board of 9.5mm thickness was prepared as test material 1: mixing gypsum powder and water according to a certain proportion, fully stirring, pouring into a glass mould after forming uniform gypsum slurry, covering a mould top plate, pressing the mould top plate until the top plate and a glass side plate are mutually clung, standing until gypsum is initially set, and taking down to obtain a tested material 1. The ceramic packaging sheet 2 is closely attached to the surface of the gypsum board, and the reading of the touch display screen is recorded. The microwave sensor 5 is a low-power microwave transceiver module, the frequency of the generated microwave local oscillation signal is 8.97GHz, and the direct-current excitation voltage is 5V. The voltage signal output by the microwave sensor 5 at room temperature is shown in fig. 3 as a function of the water content of the gypsum board.
In summary, the portable device for measuring the moisture content of the reflective microwave gypsum board can realize high-precision nondestructive measurement of the moisture content of materials with uneven moisture content distribution such as gypsum boards.
In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present utility model.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (9)
1. Portable reflection microwave gypsum board moisture content measuring device, its characterized in that includes:
a stainless steel cylinder;
Ceramic packaging sheets and rear covers respectively arranged at the front end and the rear end of the stainless steel cylinder;
the horn antenna housing, the microwave sensor, the spiral ring, the front instrument amplifying circuit and the temperature and humidity sensor are all arranged in the stainless steel cylinder; the horn antenna cover is fixed on the front side of the microwave sensor, the narrow opening of the horn antenna cover is tightly attached to the microwave sensor, and the wide opening of the horn antenna cover faces to the measured material; the spiral ring comprises an inner spiral ring and an outer spiral ring, the inner spiral ring is fixed at the rear side of the microwave sensor, the outer spiral ring is glued on the inner wall of the stainless steel cylinder, and the inner spiral ring and the outer spiral ring are meshed with each other;
And the moisture signal display control terminal is connected with the front instrument amplifying circuit and the temperature and humidity sensor.
2. The portable reflective microwave gypsum board moisture content measuring device according to claim 1, wherein the stainless steel cylinder has a wall thickness of 3-7 mm and an outer diameter of 75-120 mm.
3. The portable reflective microwave gypsum board moisture content measuring device according to claim 1, wherein the ceramic packaging sheet has a thickness of 4-10 mm and a diameter of 70-110 mm.
4. The portable reflective microwave gypsum board moisture content measuring device according to claim 1, wherein the wide mouth diameter of the horn antenna housing is 69-109 mm.
5. The portable reflective microwave gypsum board moisture content measuring device according to claim 1, wherein the frequency range of the microwave local oscillation signal generated by the microwave sensor is 2.4-11 GHz, the radiation power is 5-50 mw, and the working voltage is 5V.
6. The portable reflective microwave gypsum board moisture content measuring device according to claim 1, wherein the microwave sensor transmits microwave signals and receives reflected echo signals, and the transmission angle and caliber of the microwave sensor are related to the distance between the wide opening of the horn antenna housing and the measured material.
7. The portable reflective microwave gypsum board moisture content measuring device according to claim 1, wherein the spiral ring has an outer diameter of 70-110 mm and an adjustable length of 10-50 mm.
8. The portable reflection microwave gypsum board water content measuring device according to claim 1, wherein the front-rear adjustable distance of the microwave sensor is 10-50 mm by adjusting the spiral ring rotation.
9. The portable reflection microwave gypsum board water content measuring device according to claim 1, wherein the water content signal display control terminal is realized by a single chip microcomputer and a touch display screen, the single chip microcomputer is used for signal subsequent processing and water content calculation, and the touch display screen is used for displaying the water content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322763581.1U CN220961301U (en) | 2023-10-16 | 2023-10-16 | Portable reflected microwave gypsum board moisture content measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322763581.1U CN220961301U (en) | 2023-10-16 | 2023-10-16 | Portable reflected microwave gypsum board moisture content measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220961301U true CN220961301U (en) | 2024-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322763581.1U Active CN220961301U (en) | 2023-10-16 | 2023-10-16 | Portable reflected microwave gypsum board moisture content measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220961301U (en) |
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2023
- 2023-10-16 CN CN202322763581.1U patent/CN220961301U/en active Active
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