CN216821615U - Unfreezing device for removing antenna coupling - Google Patents
Unfreezing device for removing antenna coupling Download PDFInfo
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- CN216821615U CN216821615U CN202122812087.0U CN202122812087U CN216821615U CN 216821615 U CN216821615 U CN 216821615U CN 202122812087 U CN202122812087 U CN 202122812087U CN 216821615 U CN216821615 U CN 216821615U
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Abstract
The application discloses a defrosting device for removing antenna coupling, relates to the technical field of defrosting, and particularly relates to a defrosting device for removing antenna coupling; the device comprises: the power module, the control module, the radio frequency amplification module and the plurality of antennas are arranged, and the frequency and the amplitude of radio frequency signals transmitted by the antennas are respectively and independently regulated, so that uniformly distributed electromagnetic fields are obtained in the shielding cavity, and the function of quickly thawing food materials is realized; through setting up different antennas in different polarization directions to improve isolation between the antenna unit, reduce the power coupling between each passageway under the condition of various different loads, improve the effect of unfreezing.
Description
Technical Field
The application relates to the technical field of unfreezing, in particular to an unfreezing device for antenna coupling removal.
Background
In the current life, the most original mode of depending on heat transfer is often adopted for unfreezing food materials, and the method comprises natural unfreezing, water immersion unfreezing, refrigerator cold storage unfreezing and the like. The method has long thawing time, and is easy to cause the juice loss rate of the food materials in the thawing process and the microbial contamination, so that the quality of the thawed food materials is poor.
In the existing microwave (915MHz and 2450MHz) thawing technology, because the field intensity distribution of an electromagnetic field is not uniform, a hot spot is formed at the center of the electromagnetic field, so that the phenomena of large temperature difference between the surface temperature and the center of thawed food materials and local overheating are caused, and the food material quality is not favorably maintained; the low-frequency (13.56MHz, 27MHz and 40MHz) unfreezing technology has the problems of long unfreezing time, excessive heating at the edge and incapability of heating to more than 0 ℃. Especially in scenes such as fresh markets, supermarkets, restaurants and the like, the existing unfreezing technology cannot meet the requirement for quickly unfreezing large-volume food materials.
Therefore, in view of the problems in the prior art, it is important to provide a thawing technology capable of thawing food material uniformly and quickly.
SUMMERY OF THE UTILITY MODEL
The utility model aims to avoid the defects in the prior art and provides the unfreezing device capable of unfreezing food materials uniformly and quickly.
The purpose of the utility model is realized by the following technical scheme:
a de-antenna coupled thawing apparatus, comprising: the device comprises a power supply module, a control module, a radio frequency amplification module and a plurality of antennas;
the power supply module is respectively connected with the control module and the radio frequency amplification module and respectively supplies power to the control module and the radio frequency amplification module; the control module comprises a plurality of signal generating units and a plurality of amplitude control units; the radio frequency amplification module comprises a plurality of signal amplification units; the signal generating unit is used for generating radio frequency signals and sending the radio frequency signals to the corresponding amplitude control unit, and the amplitude control unit is used for adjusting the amplitude of the received radio frequency signals, sending the radio frequency signals to the corresponding signal amplifying unit for amplifying the signals and sending the radio frequency signals to the corresponding antenna; the polarization directions of two adjacent antennas form a space vector included angle theta, and the theta is more than 0 degree and less than 180 degrees.
Specifically, a detection module is arranged between the radio frequency amplification module and each antenna; the detection module is connected with the control module; the detection module comprises a power detection unit and a plurality of power couplers; the power coupler includes: the input end, the output end, the coupling end and the isolation end; the input end of each power coupler is respectively and independently connected with the corresponding signal amplification unit, the output end of each power coupler is respectively and independently connected with the corresponding antenna, and the coupling end and the isolation end of each power coupler are respectively and independently connected with the power detection unit.
More specifically, the control module further comprises an MCU, and target power is arranged in the MCU; the MCU is respectively and independently connected with each unit in the control module; the power detection unit samples the forward power of each antenna through the coupling end of each power coupler; the MCU is used for generating an amplitude control signal according to the target power and the sampled forward power and transmitting the amplitude control signal to the corresponding amplitude control unit.
More specifically, a shielded cavity; each antenna is arranged in the shielding cavity; an insulating supporting plate is arranged in the shielding cavity.
More specifically, a plurality of metal clapboards and temperature sensors are also arranged in the shielding cavity; the metal partition plate is arranged between the adjacent antennas; the temperature sensor is connected with the MCU and provides temperature information in the cavity for the MCU.
In the above, the antenna includes an IFA antenna, and the space vector angle θ is 90 °.
In the above, the polarization of the antenna is circular polarization or elliptical polarization.
Above, the antenna comprises a multi-frequency microstrip antenna.
Furthermore, the control module also comprises a plurality of phase control units; the phase control unit is respectively connected with the corresponding amplitude control unit and the signal amplification unit and is used for controlling the phase of the radio frequency signal so as to enable the power output by each antenna to have different phases.
Furthermore, the power detection unit samples the reflected power through the isolation end of each power coupler and sends the collected reflected power to the MCU.
The utility model achieves the following beneficial effects: a de-antenna coupled thawing apparatus, comprising: the power supply module, the control module, the radio frequency amplification module and the plurality of antennas are arranged, and the frequency and the amplitude of radio frequency signals transmitted by the antennas are independently regulated and controlled respectively, so that an electromagnetic field with uniform distribution is obtained in the shielding cavity, and the function of quickly thawing food materials is realized; through setting up different antennas in different polarization directions to improve isolation between the antenna unit, reduce the power coupling between each passageway under the condition of various different loads, improve the effect of unfreezing.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic block diagram of a de-antenna coupled thawing apparatus in an embodiment of the present application;
FIG. 2 is a first structural schematic diagram of a de-antenna coupled thawing device in an embodiment of the present application;
fig. 3 is a second structural diagram of a defrosting apparatus for decoupling an antenna in an embodiment of the present application.
Wherein, fig. 2 to fig. 3 include:
1. a shielding cavity; 2. an insulating support plate; 31. a first antenna; 32. a second antenna; 33. a third antenna;
41. a first metal separator; 42. a second metal separator; 5. and (4) unfreezing the food material.
Detailed Description
In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below through embodiments with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Example 1
One of the implementation methods of the thawing apparatus for antenna decoupling according to the present application, as shown in fig. 1, 2 and 3, includes: the antenna comprises a shielding cavity 1, an insulating supporting plate 2, a power supply module, a control module, a radio frequency amplification module and a plurality of antennas; the antenna includes: a first antenna 31 and a second antenna 32. Wherein, insulating layer board 2, first antenna 31 and second antenna 32 all set up in shielding cavity 1, and insulating layer board 2 can adopt materials such as glass, pottery to make for place the edible material 5 that unfreezes.
The power module is respectively connected with each module to supply power to each module.
The control module comprises a plurality of signal generating units and a plurality of amplitude control units, namely a first amplitude control unit and a second amplitude control unit; the rf amplifying module includes a plurality of signal amplifying units, i.e., a first signal amplifying unit and a second signal amplifying unit, which correspond to the first antenna 31 and the second antenna 32, respectively.
The signal generating unit is used for generating radio frequency signals and sending the radio frequency signals to the corresponding amplitude control unit; the amplitude control unit adjusts the amplitude of the received radio frequency signal, sends the radio frequency signal to a corresponding signal amplification unit for signal amplification, sends the radio frequency signal to a corresponding antenna, and generates an electromagnetic field for radiating and unfreezing the food material 5 in the shielding cavity 1.
Specifically, as shown in fig. 1, the first signal generating unit is configured to generate a first radio frequency signal and send the first radio frequency signal to the first amplitude control unit; the first amplitude control unit adjusts the amplitude of the received first radio frequency signal, and sends the first radio frequency signal to the first signal amplification unit for signal amplification, and then sends the first radio frequency signal to the first antenna 31. The second signal generating unit is used for generating a second radio frequency signal and sending the second radio frequency signal to the second amplitude control unit; the second amplitude control unit adjusts the amplitude of the received second radio frequency signal, and sends the second radio frequency signal to the second signal amplification unit for signal amplification, and then sends the second radio frequency signal to the second antenna 32. At this time, the first radio frequency signal or the second radio frequency signal has a relatively independent channel from the time the first radio frequency signal or the second radio frequency signal is generated and transmitted to the first antenna 31 or the second antenna 32, and the first radio frequency signal and the second radio frequency signal do not interfere with each other. Similarly, when multiple antennas are provided, each antenna (e.g., the third antenna 33) is provided with a relatively independent channel, and the following statements are not repeated unnecessarily.
More specifically, the polarization directions of two adjacent antennas form a space vector included angle theta, and theta is more than 0 degree and less than 180 degrees; i.e. two adjacent antennas, with different polarization directions. The antenna polarization is a parameter describing the vector space orientation of electromagnetic waves radiated by the antenna. Since the electric field and the magnetic field have a constant relationship, the polarization direction of electromagnetic waves radiated from the antenna is generally directed in the space of the electric field vector. The polarization of the antenna is classified into linear polarization, circular polarization, and elliptical polarization. Linear polarization is divided into horizontal polarization and vertical polarization; circular polarization is further classified into left-hand circular polarization and right-hand circular polarization.
More specifically, the antenna includes an IFA antenna, and the space vector angle θ is 90 °.
When adopting two antenna structure:
such as: the first antenna 31 and the second antenna 32 are both IFA antennas, the first antenna 31 adopts vertical polarization, and the second antenna 32 adopts horizontal polarization;
another example is: the first antenna 31 and the second antenna 32 are both IFA antennas, and the first antenna 31 employs 45 ° polarization and the second antenna 32 employs-45 ° polarization.
When adopting three antenna structure:
such as: the first antenna 31, the second antenna 32 and the third antenna 33 are all IFA antennas, the first antenna 31 adopts vertical polarization, the second antenna 32 adopts horizontal polarization, and the third antenna 33 adopts vertical polarization; or the first antenna 31 with horizontal polarization, the second antenna 32 with vertical polarization and the third antenna 33 with horizontal polarization.
Two adjacent antennas adopt different polarization directions, so that the isolation between the antennas can be improved, and the power coupling between channels under various different loads is reduced.
In another embodiment, two adjacent antennas use circular or elliptical polarization in different directions.
Preferably, a plurality of metal partition plates are further arranged in the shielding cavity 1 and arranged between the adjacent antennas to isolate the two adjacent antennas and avoid close-range coupling.
Specifically, the first metal spacer 41 is disposed between the first antenna 31 and the second antenna 32; the second metal spacer 42 is disposed between the second antenna 32 and the third antenna 33.
Due to the arrangement of the metal partition plates, the isolation between adjacent antennas can be further enhanced, the power emitted by a certain antenna is prevented from being absorbed by the adjacent antennas, namely, the corresponding reflected power is reduced, and therefore the radio frequency energy emitted by each antenna can be effectively absorbed by the unfreezing food material 5.
Example 2
As shown in fig. 1, fig. 2 and fig. 3, a main technical solution of this embodiment is substantially the same as that of embodiment 1, and features not explained in this embodiment adopt the explanations in embodiment 1, and are not described again here. This example differs from example 1 in that:
the control module also comprises an MCU, and target power is arranged in the MCU; the MCU is respectively and independently connected with each unit in the control module.
A detection module is arranged between the radio frequency amplification module and each antenna; the detection module is connected with the control module; the detection module comprises a power detection unit and a plurality of power couplers, and each antenna is provided with a corresponding power coupler and arranged between the antenna and a corresponding signal amplification unit.
The power coupler adopts a directional power coupler, and comprises: the input end, the output end, the coupling end and the isolation end; the input end of each power coupler is respectively and independently connected with the corresponding signal amplification unit, the output end of each power coupler is respectively and independently connected with the corresponding antenna, and the coupling end and the isolation end of each power coupler are respectively and independently connected with the power detection unit. The coupling end is used for coupling with a radio frequency signal input by the input end to generate forward power and sending the forward power to the power detection unit.
Specifically, the power coupler includes a first power coupler and a second power coupler, input ends of the first power coupler and the second power coupler are respectively and independently connected with the first signal amplification unit and the second signal amplification unit, output ends of the first power coupler and the second power coupler are respectively and independently connected with the first antenna 31 and the second antenna 32, and a coupling end and an isolation end are respectively and independently connected with the power detection unit. Similarly, when multiple antennas are provided, each antenna (e.g., third antenna 33) is provided with a corresponding power coupler, and the following statements are not repeated in a cumbersome manner.
The power detection unit samples the forward power of each antenna through the coupling end of each power coupler; and the MCU respectively and independently compares each collected forward power with the target power to calculate and generate an amplitude control signal, and sends the amplitude control signal to the corresponding amplitude control unit. If the forward power is larger than the set target power, the MCU controls the corresponding amplitude control unit to reduce the amplitude of the radio-frequency signal and reduce the output power of the radio-frequency signal; if the forward power is smaller than the set target power, the MCU controls the corresponding amplitude control unit to increase the amplitude of the radio-frequency signal and enhance the output power of the radio-frequency signal. The function of respectively regulating and controlling the output power of the radio-frequency signal of each antenna is realized, and the unfreezing efficiency is improved.
Preferably, the control module is further connected with a control interface, and the target power can be selected or set through the control interface so as to achieve a better unfreezing effect.
More preferably, a temperature sensor is further arranged in the shielding cavity 1; the temperature sensor is connected with the MCU and provides temperature information in the cavity for the MCU. The MCU can adjust the radio frequency power corresponding to each antenna by combining with the actual temperature condition in the shielding cavity 1, so as to avoid the condition that the output radio frequency power is too small or too high.
Example 3
As shown in fig. 1, fig. 2 and fig. 3, a main technical solution of this embodiment is substantially the same as that of embodiment 1 or embodiment 2, and features not explained in this embodiment adopt the explanations in embodiment 1 or embodiment 2, and are not described again here. This example differs from example 1 or example 2 in that:
the antenna comprises a multi-frequency microstrip antenna. The microstrip antenna comprises a dielectric substrate, a radiator and a ground plate; the thickness of the dielectric substrate is far smaller than the wavelength, the metal thin layer at the bottom of the substrate is connected with the grounding plate, and the metal thin layer with a specific shape is manufactured on the front surface of the substrate through a photoetching process to be used as a radiator; the multi-frequency microstrip antenna is a microstrip antenna having a plurality of radiation frequency bands.
When adopting two antenna structure:
such as: the first antenna 31 adopts an IFA antenna, and the second antenna 32 adopts a multi-frequency microstrip antenna;
for another example: the first antenna 31 and the second antenna 32 both use multi-frequency microstrip antennas.
When adopting three antenna structure:
such as: the first antenna 31 and the third antenna 33 both adopt multi-frequency microstrip antennas; the second antenna 32 employs an IFA antenna.
Example 4
As shown in fig. 1, fig. 2 and fig. 3, a main technical solution of this embodiment is substantially the same as that of embodiment 1, embodiment 2 or embodiment 3, and features not explained in this embodiment adopt the explanations in embodiment 1, embodiment 2 or embodiment 3, and are not described again here. This example differs from example 1 or example 2 or example 3 in that:
the control module also comprises a plurality of phase control units, wherein the phase control units are arranged between the corresponding amplitude control units and the signal amplification units, are respectively connected with the corresponding amplitude control units and the corresponding signal amplification units, and are used for controlling the phases of the radio-frequency signals so as to enable the power output by each antenna to have different phases, thus the isolation between the antennas can be further improved, and the power coupling between channels under the condition of various different loads can be further reduced.
Specifically, the phase control unit comprises a first phase control unit and a second phase control unit; the first phase control unit is arranged between the first amplitude control unit and the first signal amplification unit and is respectively and independently connected with the first amplitude control unit and the first signal amplification unit; the second phase control unit is arranged between the second amplitude control unit and the second signal amplification unit and is respectively and independently connected with the second amplitude control unit and the second signal amplification unit. Similarly, when a plurality of antennas are provided, each antenna (e.g., the third antenna 33) is provided with a corresponding phase control unit, and the following description will not be repeated redundantly.
In the initial stage of thawing, the control module outputs radio frequency signals with smaller power energy to each antenna in a specified frequency band sequentially under different frequencies, the power detection unit samples the reflected power through the isolation end of each power coupler and sends the collected reflected power to the MCU; and the MCU calculates the output frequency of the radio frequency signal corresponding to each antenna when the reflection power is minimum through comparison calculation according to the received reflection power so as to determine the output frequency corresponding to each antenna.
Further, the power detection unit sends the collected forward powers to the MCU, and the MCU compares the forward powers with each other and judges whether the forward powers have the same frequency or not; if the forward power with the same frequency exists, a phase adjusting signal is generated and sent to the corresponding phase control unit, and the phase of the radio frequency signal is adjusted. If no radio frequency signal with the same phase exists, the MCU controls each amplitude control unit to increase the amplitude of the radio frequency signal, enhance the output power of the radio frequency signal and start to unfreeze the unfrozen food material 5.
By regulating and controlling the phase and frequency of the radio-frequency signal output by each antenna, the output working efficiency can be further improved, and the reflected power is reduced, so that the transmitted radio-frequency energy can be effectively absorbed by the unfreezing food material 5, and the absorption rate can reach 80-90%.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims (10)
1. A de-antenna coupled thawing apparatus, comprising: the device comprises a power supply module, a control module, a radio frequency amplification module and a plurality of antennas;
the power supply module is respectively connected with the control module and the radio frequency amplification module and respectively supplies power to the control module and the radio frequency amplification module;
the control module comprises a plurality of signal generating units and a plurality of amplitude control units;
the radio frequency amplification module comprises a plurality of signal amplification units;
the signal generating unit is used for generating radio frequency signals and sending the radio frequency signals to the corresponding amplitude control unit, and the amplitude control unit is used for adjusting the amplitude of the received radio frequency signals, sending the radio frequency signals to the corresponding signal amplifying unit for amplifying the signals and sending the radio frequency signals to the corresponding antenna;
the polarization directions of two adjacent antennas form a space vector included angle theta, and the theta is more than 0 degree and less than 180 degrees.
2. A de-antenna-coupled thawing apparatus according to claim 1, wherein: a detection module is arranged between the radio frequency amplification module and each antenna; the detection module is connected with the control module;
the detection module comprises a power detection unit and a plurality of power couplers;
The power coupler includes: the input end, the output end, the coupling end and the isolation end; the input end of each power coupler is separately connected with the corresponding signal amplification unit, the output end of each power coupler is separately connected with the corresponding antenna, and the coupling end and the isolation end of each power coupler are separately connected with the power detection unit.
3. The de-antenna-coupled thawing apparatus according to claim 2, comprising:
the control module also comprises an MCU, and target power is arranged in the MCU;
the MCU is respectively and independently connected with each unit in the control module;
the power detection unit samples the forward power of each antenna through the coupling end of each power coupler;
the MCU is used for generating an amplitude control signal according to the target power and the sampled forward power and sending the amplitude control signal to the corresponding amplitude control unit.
4. A de-antenna-coupled thawing apparatus according to claim 3, comprising: a shielding cavity;
each antenna is arranged in the shielding cavity;
an insulating supporting plate is arranged in the shielding cavity.
5. The antenna-decoupled thawing apparatus of claim 4, wherein:
A plurality of metal clapboards and temperature sensors are arranged in the shielding cavity;
the metal partition plate is arranged between the adjacent antennas;
the temperature sensor is connected with the MCU and provides temperature information in the cavity for the MCU.
6. A de-antenna-coupled thawing apparatus according to any of claims 1 to 5, wherein:
the antenna comprises an IFA antenna, and the space vector included angle theta is equal to 90 degrees.
7. The de-antenna-coupled thawing apparatus according to any of claims 1 to 5, comprising:
the polarization of the antenna adopts circular polarization or elliptical polarization.
8. The de-antenna-coupled thawing apparatus according to any of claims 1 to 5, comprising:
the antenna comprises a multi-frequency microstrip antenna.
9. A de-antenna-coupled thawing apparatus according to claim 8, comprising;
the control module also comprises a plurality of phase control units;
the phase control unit is respectively connected with the corresponding amplitude control unit and the corresponding signal amplification unit and is used for controlling the phase of the radio frequency signal so as to enable the power output by each antenna to have different phases.
10. A de-antenna-coupled thawing apparatus according to claim 3, comprising:
the power detection unit samples the reflected power through the isolation end of each power coupler and sends the collected reflected power to the MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122812087.0U CN216821615U (en) | 2021-11-16 | 2021-11-16 | Unfreezing device for removing antenna coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122812087.0U CN216821615U (en) | 2021-11-16 | 2021-11-16 | Unfreezing device for removing antenna coupling |
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| Publication Number | Publication Date |
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| CN216821615U true CN216821615U (en) | 2022-06-28 |
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| CN202122812087.0U Active CN216821615U (en) | 2021-11-16 | 2021-11-16 | Unfreezing device for removing antenna coupling |
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