阅读说明：本技术 微波输出控制方法、装置、存储介质及终端设备 (Microwave output control method and device, storage medium and terminal equipment ) 是由 林先其 贾小翠 刘东屹 李晨楠 文章 于 2019-09-02 设计创作，主要内容包括：本申请实施例公开了一种微波输出控制方法、装置、存储介质及终端设备,其中,方法包括：获取微波加热的工作状态；所述工作状态包括待加热物体的状态和对所述待加热物体加热的微波传输线的状态；所述待加热物体构成所述微波传输线的一部分；根据所述工作状态,确定微波发生器输出微波信号的工作参数；其中,所述微波发生器的微波输出端口与所述微波传输线的微波馈入端口连接。本申请实施例可以有效地提高微波加热的能效比。(The embodiment of the application discloses a microwave output control method, a microwave output control device, a storage medium and terminal equipment, wherein the method comprises the following steps: acquiring the working state of microwave heating; the operating state includes a state of an object to be heated and a state of a microwave transmission line heating the object to be heated; the object to be heated constitutes a part of the microwave transmission line; determining the working parameters of the microwave signal output by the microwave generator according to the working state; wherein, the microwave output port of the microwave generator is connected with the microwave feed-in port of the microwave transmission line. The embodiment of the application can effectively improve the energy efficiency ratio of microwave heating.)

1. A microwave output control method, comprising:

acquiring the working state of microwave heating; the operating state includes a state of an object to be heated and a state of a microwave transmission line heating the object to be heated; the object to be heated constitutes a part of the microwave transmission line;

determining the working parameters of the microwave signal output by the microwave generator according to the working state; wherein the microwave generator is connected with the microwave transmission line.

2. The method of claim 1, wherein the microwave generator is connected to the microwave transmission line through a microwave power amplifier, the method further comprising:

and determining the working parameters of the microwave power amplifier for amplifying the microwave signals according to the working state.

3. The method of claim 1, wherein the operating parameter comprises an output frequency of the microwave generator, and the obtaining comprises:

sequentially setting the output frequency of the microwave generators according to a set frequency interval in a set frequency range;

acquiring the working state of microwave heating under each output frequency; and

the process of determining comprises:

and determining the output frequency of the microwave generator according to the working state of each output frequency.

4. The method of claim 3, wherein said obtaining operating conditions for microwave heating at each of said output frequencies comprises:

and acquiring the reflected power of the microwave transmission line subjected to microwave heating at each output frequency.

5. The method of claim 4, wherein the determining comprises:

judging whether the reflected power is smaller than a first reflected power threshold value;

turning off the output of the microwave generator if the reflected power is greater than the first reflected power threshold.

6. The method of claim 5, further comprising:

if the reflected power is smaller than the first reflected power threshold value, selecting the reflected power within a set range from the obtained reflected power;

judging whether the reflected power in the set range is smaller than a second reflected power threshold value;

and if the reflected power in the set range is smaller than the second reflected power threshold value, setting the output frequency of the microwave generator according to the output frequency corresponding to the reflected power in the set range.

7. The method of claim 6, further comprising:

and if the reflected power in the set range is larger than the second reflected power threshold value, reducing the frequency interval.

8. The method of claim 4, wherein the determining comprises:

determining a range of output frequencies of the microwave generator if the reflected power of the microwave transmission line is below a second reflected power threshold;

keeping the output frequency of the microwave generator within said range.

9. The method according to claim 1, wherein the operation state includes at least one of a gas generation amount of the object to be heated, a temperature of the microwave transmission line, and a time period of the microwave heating, and the determining includes:

judging whether the working state reaches a threshold value corresponding to the working state;

and if the working state reaches a threshold value corresponding to the working state, determining the output waveform of the microwave generator.

10. The method of claim 1, wherein the microwave generator comprises multiple microwave output ports, the microwave transmission line comprises multiple microwave feed ports, and the microwave feed ports are connected to one of the microwave output ports; the working state comprises the attribute of the object to be heated and the position relation between each microwave feed-in port and the object to be heated, and the determining process comprises the following steps:

and determining the output phase of each microwave signal fed into each microwave feed-in port by the microwave generator according to the attribute of the object to be heated and the position relationship between each microwave feed-in port and the object to be heated.

11. The method of claim 2, wherein the operating parameter of the microwave power amplifier comprises at least one of gain and gate voltage.

12. A microwave output control apparatus, comprising:

the working state acquisition module is used for acquiring the working state of microwave heating; the operating state includes a state of an object to be heated and a state of a microwave transmission line heating the object to be heated; the object to be heated constitutes a part of the microwave transmission line;

the working parameter determining module is used for determining the working parameters of the microwave signal output by the microwave generator according to the working state; wherein the microwave generator is connected with the microwave transmission line.

13. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 11.

14. A terminal device for realizing microwave output control is characterized by comprising:

one or more processors;

storage means for storing one or more programs;

the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1-11.

15. A terminal device for realizing microwave output control is characterized by comprising: the microwave transmission line comprises a microwave generator, a control unit and a microwave transmission line; the microwave transmission line comprises a shielding cavity, and an object to be heated can be placed in the shielding cavity and form a part of the microwave transmission line;

the control unit is connected with the microwave generator and is used for controlling the operation of the microwave generator and realizing the method according to any one of claims 1 to 11;

and the microwave output port of the microwave generator is connected with the microwave feed-in port of the microwave transmission line.

16. The terminal apparatus of claim 15, further comprising a power amplifier, wherein a microwave output port of the microwave generator is connected to a microwave feed port of the microwave transmission line through the power amplifier; the control unit is connected with the power amplifier and used for controlling the work of the power amplifier.

Technical Field

The embodiment of the application relates to the technical field of microwave application, in particular to a microwave output control method and device, a storage medium and terminal equipment.

Background

The form of microwave heating is gradually emerging in the field of thermal energy conversion. The microwave heating has the advantages of directness, instantaneity, selectivity and the like. The principle of microwave heating is as follows: when a substance to be heated is heated by microwaves, polar molecules in the substance to be heated rotate at a high speed in accordance with a high-frequency alternating electromagnetic field, and a large amount of heat is generated in accordance with the rotation of the polar molecules themselves and the mutual friction between adjacent molecules. However, microwave heating is not arbitrary, and the efficiency of microwave heating depends on the mutual matching between the microwave power source and the object to be heated. How to improve the energy efficiency ratio of microwave heating is a technical problem which needs to be solved urgently at present.

Disclosure of Invention

Embodiments of the present application provide a microwave output control method, an apparatus, a storage medium, and a terminal device, so as to solve or alleviate one or more technical problems in the prior art.

As an aspect of an embodiment of the present application, an embodiment of the present application provides a microwave output control method, including: acquiring the working state of microwave heating; the operating state includes a state of an object to be heated and a state of a microwave transmission line heating the object to be heated; the object to be heated constitutes a part of the microwave transmission line; determining the working parameters of the microwave signal output by the microwave generator according to the working state; wherein the microwave generator is connected with the microwave transmission line.

As an aspect of an embodiment of the present application, an embodiment of the present application provides a microwave output control apparatus, including a working state obtaining module, configured to obtain a working state of microwave heating; the operating state includes a state of an object to be heated and a state of a microwave transmission line heating the object to be heated; the object to be heated constitutes a part of the microwave transmission line; the working parameter determining module is used for determining the working parameters of the microwave signal output by the microwave generator according to the working state; wherein the microwave generator is connected with the microwave transmission line.

As an aspect of the embodiments of the present application, the embodiments of the present application provide a design, a structure of the microwave output control includes a processor and a memory, the memory is used for a device of the microwave output control to execute a program corresponding to the method of the microwave output control, and the processor is configured to execute the program stored in the memory. The microwave output control device further comprises a communication interface for communicating the microwave output control device with other equipment or a communication network.

As an aspect of the embodiments of the present application, a computer-readable storage medium is provided, which is used for computer software instructions for a microwave output control device, and includes a program for executing the microwave output control method.

By adopting the technical scheme, the working parameters of the microwave signal output by the microwave generator are determined by detecting the state of the object to be heated and the state of the microwave transmission line for heating the object to be heated in the microwave heating process, and the effect of controlling the microwave output is achieved. In addition, in the microwave heating process, the control of microwave output is also adjusted in real time according to the state fed back by microwave heating, so that the energy efficiency ratio of microwave heating can be effectively improved.

The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and following detailed description.

Drawings

In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.

Fig. 1 shows a schematic flowchart of a microwave output control method provided in an embodiment of the present application.

Fig. 2 shows a schematic flowchart of a microwave output control method provided in an embodiment of the present application.

Fig. 3 is a schematic flowchart illustrating an output frequency control method according to an embodiment of the present application

Fig. 4 is a schematic flowchart illustrating a method for controlling whether the output of the microwave generator is output or not according to an embodiment of the present application.

Fig. 5 is a flowchart illustrating a method for determining a range of output frequencies according to an embodiment of the present disclosure.

Fig. 6 shows a schematic structural diagram of a microwave heating device provided in an embodiment of the present application.

Fig. 7 shows a flowchart of adaptive control of output frequency according to an embodiment of the present application.

Fig. 8 shows a flowchart of adaptive power control provided in an embodiment of the present application.

Fig. 9 to 12 respectively show a schematic structural diagram of a microwave heating device provided in an embodiment of the present application.

Fig. 13 is a schematic structural diagram illustrating a microwave output control device according to an embodiment of the present application.

Fig. 14 shows a schematic structural diagram of a terminal device provided in an embodiment of the present application.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

As an exemplary implementation, fig. 1 shows a schematic flow chart of an embodiment of a microwave output control method, including steps S100 and S200, as follows:

and S100, acquiring the working state of microwave heating. The operation state may include a state of the object to be heated and a state of the microwave transmission line to heat the object to be heated. The object to be heated constitutes a part of the microwave transmission line. In some embodiments, the microwave transmission line is disposed within a shielded cavity. The shielding cavity can be semi-closed, and the opening of the shielding cavity is provided with a shielding cover which can cover the opening of the shielding cavity. An object to be heated can be placed in the shielding cavity through the opening, and is integrated with the microwave transmission line. Of course, the shielded cavity may be fully enclosed. The loss tangent of the object to be heated is larger than the loss tangent of the portion of the microwave transmission line that is in contact with the object to be heated. Since the loss tangent of the object to be heated is larger than the loss tangent of the portion of the microwave transmission line in contact therewith, energy is more lost to the object to be heated having a high loss angle, and heating of the object to be heated by the microwave transmission line is realized.

Illustratively, the state of the object to be heated may include temperature, shape, positional relationship with the microwave transmission line, substance condition generated by the object to be heated, and the like. The state of the microwave transmission line may include temperature, reflected power, etc.

S200, determining working parameters of microwave signals output by a microwave generator according to the obtained working state; wherein the microwave generator is connected with the microwave transmission line.

The operating parameters may include the output frequency, output power, phase, output waveform, etc. of the microwave signal. The output waveform may include a pulse waveform, a continuous wave, a sawtooth wave, and the like. The microwave generator may include a plurality of microwave output ports, and the microwave transmission line may also include a plurality of microwave feed ports, each microwave feed port of the microwave transmission line being connected to a lower microwave output port. Therefore, the microwave generator can output a plurality of paths of microwave signals to the microwave transmission line to heat the object to be heated.

Thus, the operating parameters may also include controlling the output of each microwave output port.

In the embodiment of the application, the control of the microwave output can be adjusted in real time according to the state fed back by microwave heating, so that the energy efficiency ratio of the microwave heating can be effectively improved.

In some embodiments, the microwave generator may also be connected to the microwave transmission line through a microwave power amplifier. The microwave power amplifier sets the adjustment of gain and grid voltage. As shown in fig. 2, the method for controlling microwaves provided in this embodiment may further include step S300, as follows:

and S300, determining the working parameters of the microwave power amplifier for amplifying the microwave signals according to the obtained working state. The operating parameter of the microwave power amplifier may comprise at least one of gain, gate voltage.

In some embodiments, according to the obtained operating state, the operating parameters of the microwave generator and the microwave power amplifier may be adjusted at the same time, or one of the operating parameters may be adjusted. The regulation of the microwave power amplifier is cooperated with the regulation of the output power of the microwave generator, so that the microwave power amplifier can be ensured to work on a high-power and high-efficiency working node, and the microwave power amplifier can be protected from being damaged due to overlarge input power. In some embodiments, the control of the output waveform of the microwave generator may be coordinated with the adjustment of the gate voltage of the microwave power amplifier, so that the power dissipation value of the microwave power amplifier is a minimum value during the period of no output of the microwave generator.

Illustratively, examples of the two above-mentioned synergistic adjustments may be as follows:

in some embodiments, the microwave generator may be scanned in frequency steps, which may greatly improve the uniformity of microwave heating. Meanwhile, the microwave output is continuously adjusted in a stepping mode by using the frequency and is heated, and a relatively better or optimal energy feed point, namely the output frequency, can be found through the feedback state information. As shown in fig. 3, the process of controlling the output frequency of the microwave generator provided in this embodiment may include steps S110, S120, and S210 as follows:

and S110, setting the output frequency of the microwave generator according to the set frequency interval in the set frequency range. For example, the set frequency range may be 300Hz to 400Hz, the frequency interval is 10Hz, the microwave generator may increase the frequency value from 300Hz every 10Hz, so that the microwave generator outputs microwave signals with frequencies of 300Hz, 310Hz, 320Hz, 330Hz, …, and 400 Hz. The microwave transmission line continuously generates loss under the excitation of microwave signals, and the effect of uniform heating is achieved.

And S120, acquiring the working state of microwave heating under each output frequency.

S210, determining the output frequency of the microwave generator according to the working state of each output frequency.

In the embodiment of the application, when the microwave generator outputs the microwave signals of corresponding frequencies step by step according to a certain frequency interval, the feedback power of the microwave transmission quantity under each output frequency can be obtained, and the range or a certain numerical value of the output frequency of the microwave generator can be determined according to the change condition of the feedback power, so that the energy fed in by the microwave generator can be ensured to achieve better utilization efficiency.

In some embodiments, the temperature change of the object to be heated and the change of the substance generated by the object to be heated at each output frequency can be obtained to determine the range or a certain value of the output frequency of the microwave generator, and the feeding capacity of the microwave generator can be ensured to achieve better utilization efficiency.

In some embodiments, during the microwave heating by the step-by-step setting of the microwave generator, whether or not the object to be heated is present in the microwave transmission line may be judged by the change in the reflected power.

Exemplarily, referring to fig. 4, fig. 4 shows a control process of whether the output of the microwave generator is outputted or not, including steps S410 to S440, as follows:

and S410, acquiring the reflected power of the microwave transmission line for microwave heating at each output frequency.

And S420, judging whether the reflected power is smaller than a first reflected power threshold value.

And S430, if the reflected power is larger than the first reflected power threshold value, the output of the microwave generator is turned off.

S440, if the reflected power is less than the first reflected power threshold, maintaining the output of the microwave generator.

In the embodiment of the present application, the first reflected power threshold value is used for determining whether or not an object to be heated is present. The value range is related to the loss tangent of the object to be heated and the transmission line in contact with the object to be heated. The smaller the loss tangent, the greater the power reflected, while the larger the loss angle of the object to be heated, the smaller the power reflected. Therefore, the present embodiment may set one reflected power threshold, i.e., the first reflected power threshold. If the reflected power is greater than the first reflected power threshold, indicating the absence of an object to be heated, the output of the microwave generator may be turned off.

Typically, the first reflected power threshold is less than the rated output power of the microwave generator. For example, the nominal output power is 40dBm, and the first reflected power threshold may be set to 34dBm or less.

In general, the first reflected power threshold value may be determined according to a loss tangent between a loss tangent of a body to be heated and a loss tangent of a transmission line in contact with the body to be heated. For example, when the object to be heated is not added to the microwave transmission line, the reflected power is 36 dBm; adding an object to be heated into the microwave transmission line, wherein the reflected power is 20 dBm; at this time, the value of the first reflected power threshold may be 20-36 dBm.

In some embodiments, if the reflected power is less than the first reflected power threshold, indicating the presence of an object to be heated, the output of the microwave generator may be maintained. Meanwhile, the output frequency of the microwave generator can be adjusted, and the energy consumption ratio of microwave heating is improved. The output frequency of the microwave generator may be specifically adjusted as follows:

first, the reflected power within the set range is selected from the acquired reflected powers. The setting range may be a range in which one or more reflected powers at the respective arrangement positions are sequentially selected, for example, a minimum reflected power. The setting range may be a range having an upper limit value and a lower limit value.

Then, whether the reflected power within the set range is smaller than a second reflected power threshold value is judged. For example, it is determined whether the minimum reflected power is less than a second reflected power threshold.

At this time, if the reflected power within the set range is less than the second reflected power threshold value, the output frequency of the microwave generator is set according to the output frequency corresponding to the reflected power within the set range. For example, an output frequency corresponding to the minimum reflected power can be selected from this set range as the output power of the microwave generator.

In addition, if the reflected power within the set range is greater than the second reflected power threshold, the frequency interval is narrowed. And continuously setting the output frequency of the microwave generator at the frequency interval, acquiring corresponding reflected power, and repeating the steps until the reflected power within the set range is smaller than a second reflected power threshold value.

In some embodiments, the frequency range in which the microwave generator operates may be determined during the step-wise setting of the microwave generator for microwave heating.

Exemplarily, referring to fig. 5, fig. 5 shows a control process of a range of an output frequency of a microwave generator, including steps S510 to S530, as follows:

and S510, acquiring the reflected power of the microwave transmission line for microwave heating at each output frequency.

S520, a range of the output frequency of the microwave generator is determined in a case where the reflected power of the microwave transmission line is lower than a second reflected power threshold. Generally, the second reflected power threshold is lower than the first reflected power threshold.

S530, keeping the output frequency of the microwave generator within the range of the determined output frequency.

In this embodiment, the second reflected power threshold is used to determine the working state of the power source, and the output frequency smaller than the second reflected power threshold is beneficial to feeding microwave energy, i.e. effective heating can be achieved. And taking the second reflected power threshold as a boundary, and taking the output frequency corresponding to the reflected power smaller than the second reflected power threshold as a working frequency point of the microwave generator. Of course, the smaller the reflected power, the more favorable the output frequency corresponds to for the energy feed, i.e. heating, of the microwave signal. The value of the second reflected power threshold is within a certain range, and the value range is related to the rated output power of the microwave generator. For example, when the rated output power is 40dBm, the second reflected power threshold may be set to 30dBm or lower.

During the microwave heating process, the reflected power of the microwave transmission line may shift in frequency. For example, the output power F and the operating frequency point of the microwave transmission line are F, and at time t1, the reflected power of the microwave transmission line is less than the second reflected power threshold, but at time t2, the reflected power of the microwave transmission line may be at the second reflected power threshold. However, we need to ensure that the microwave generator remains in operation at all times when the reflected power is lower than the second reflected power. This requires that the embodiment of the present application automatically track the output power, and operate with the minimum output power when the reflected power is lower than the second reflected power threshold, so as to achieve the purpose of optimization.

Illustratively, 3 output powers are generated in steps of 1MHz, based on the current output power f, for example: f-2, f-1, f; alternatively, f-1, f, f + 1; or f, f +1, f + 2. Then, the microwave generator outputs corresponding microwave signals to the microwave transmission line in sequence according to the generated output power, and obtains the reflected power fed back under each output power. And selecting the output power corresponding to the minimum reflected power as the output power of the current microwave generator. After the microwave generator was operated at the above selected output power for 2 seconds, the above operation was repeated again. It should be noted that the above-mentioned step is not limited to 1MHz, and may be 2MHz, 3MHz, or the like. The duration of the operation is not limited to 2 seconds, and may be 4 seconds, 5 seconds, or the like. This is done for convenience of example only.

In some embodiments, the operation state includes at least one of a gas generation amount of the object to be heated, a temperature of the microwave transmission line, and a time period of the microwave heating, and the determining includes:

judging whether the working state reaches a threshold value corresponding to the working state;

and if the working state reaches the threshold value corresponding to the working state, determining the output waveform of the microwave generator.

Illustratively, the output waveform of the microwave generator may be dynamically adjusted if the time period for heating the object to be heated reaches a preset time period threshold value. Alternatively, the gain or gate voltage of the microwave power amplifier may be adjusted so that the output power of the microwave signal input into the microwave transmission line can meet the heating requirement. The output waveform of microwave generation may also be adjusted at this time if the gas generation amount of the object to be heated reaches a preset gas content threshold value. For example, a continuous wave microwave signal is adjusted to a pulsed microwave signal. For another example, the duty cycle of the pulsed microwave signal is adjusted. Alternatively, if the temperature of the object to be heated reaches a preset temperature threshold value, the output waveform of the microwave generator may be adjusted. Or, if the temperature of the microwave transmission line reaches a preset temperature threshold, the output waveform of the microwave generator can be adjusted.

In some embodiments, the microwave generator may include multiple microwave output ports. The microwave transmission line may include a plurality of microwave feed ports, each microwave feed port being connected to a microwave output port for receiving the plurality of microwave signals. The operating state may include the properties of the object to be heated and the positional relationship between each microwave feed port and the object to be heated. The attribute of the object to be heated may include the shape, size, type, and the like of the object to be heated. The positional relationship may include a distance, an angle, and the like. When the microwave signals are transmitted to the object to be heated, the microwave signals can be synthesized into one microwave signal so as to improve the feeding efficiency of microwave energy.

Exemplarily, the step S200 may include: and determining the output phase of each microwave signal fed into each microwave feed-in port by the microwave generator according to the attribute of the object to be heated and the position relationship between each microwave feed-in port and the object to be heated. For example, assuming that there are four microwave feed ports, the output phases of the microwave signals fed to the microwave feed ports are determined to be 15 degrees, 45 degrees, 75 degrees, and 90 degrees, respectively, based on the positional relationship between the microwave feed ports and the object to be heated, and the shape of the object to be heated. When the microwave signals of different phases are transmitted to the object to be heated, one microwave signal can be synthesized to heat the object to be heated.

Referring to fig. 6, fig. 6 shows a structure of a microwave heating apparatus provided in an embodiment of the present application. The microwave heating apparatus includes a microwave generator 1, a microwave power amplifier 2, a control unit 4, and a microwave transmission line 3. The microwave transmission line 3 comprises a shielded cavity in which the object 6 to be heated can be placed and which constitutes a part of the microwave transmission line 3. The object 6 to be heated may include a solid substance or a liquid substance, for example, tobacco tar, aroma, and the like. The microwave output port of the microwave generator is connected with the microwave feed-in port of the microwave transmission line. The microwave output port and the microwave feed port may employ a standard 50 Ω impedance or a non-standard impedance. In some embodiments, the microwave power amplifier 1 may not be provided in the microwave heating apparatus, and the microwave generator 1 is directly connected to the microwave transmission line 3.

The control unit 4 controls the microwave generator 1 to generate a microwave signal, the microwave generator 1 transmits the generated microwave signal to the microwave power amplifier 2, the microwave power amplifier 2 amplifies the received microwave signal and feeds the amplified microwave signal into the microwave transmission line 3, and the microwave transmission line 3 is excited by the microwave signal to generate heat through self-loss, so that the object 6 to be heated is heated. Meanwhile, the control unit 4 acquires the state of the object 6 to be heated or the state of the microwave transmission line 3, and adaptively adjusts the working parameters of the microwave generator 1 or the microwave power amplifier 2 according to the acquired state, so that the power of the microwave signal fed into the microwave transmission line 3 meets the heating requirement. For example, if the object 6 to be heated is a gas matrix, the demand for the amount of mist that can be generated by heating needs to be satisfied. Of course, the control unit 4 can control whether the microwave generator and the microwave power amplifier operate or not, in addition to the operating parameters of the microwave generator and the microwave power amplifier.

Illustratively, the control unit 4 monitors the temperature of the microwave transmission line 3 in real time. When the temperature of the microwave transmission line 3 reaches a predetermined value, the control unit 4 starts the corresponding operation. For example, the output waveform of the microwave generator 1 is changed, the gain of the microwave power amplifier 2 is changed, and the like. It is ensured that the microwave transmission line 3 is not inconvenient to use or even damaged due to an excessively high temperature.

Illustratively, the control unit 4 monitors the reflected power of the microwave transmission line 3 in real time, directly or indirectly determining the conditions of the on or off operation of the microwave generator 1 and the microwave power amplifier 2, the output frequency range of the energy feed-in, etc.

Illustratively, the control unit 4 monitors the temperature of the gas substrate, the aerosol generation amount in real time. The microwave transmission line 3 is pure for continuously heating the gas-like substance matrix, and when a certain temperature interval is reached, for example: the aerosol amount reaches an excellent state at 280 +/-5 ℃. At this time, the control unit 4 can adaptively adjust the operating parameters of the microwave generator 1 and the microwave power amplification so that the temperature of the gas substrate tends to be constant and the aerosol generation amount is maintained in an excellent state.

Based on the above embodiments, the flow of the adaptive control of the output frequency in the embodiments of the present application may be as follows:

in the first step, microwave feed-in and microwave generator turn-on or turn-off are judged step by step. The microwave generator feeds microwaves into the microwave transmission line in a set frequency step, and the control unit detects the reflected power fed back to the microwave generator by the microwave transmission line in the feeding process. The control unit judges whether the reflected power is less than a first reflected power threshold. If the reflected power is less than the first reflected power threshold, the output of the microwave generator is maintained. If the reflected power is greater than the first reflected power threshold, it is an indication that the object to be heated is not present, at which point the output of the microwave generator needs to be turned off.

In a second step, the range of the output frequency of the microwave generator is determined. The control unit compares the reflected power corresponding to each output power, and determines the range of the output power corresponding to the reflected power smaller than the second reflected power threshold value. And the output power of the microwave signal output from the microwave generator is controlled to fall within the range of the output power determined here.

And thirdly, dynamically adjusting the output frequency of the microwave generator. And detecting the reflected power fed back by the microwave transmission line in real time. And dynamically adjusting the output frequency of the microwave generator at intervals through preset stepping, so that the reflection power value of the microwave transmission line is always lower than a second reflection power threshold value.

Illustratively, referring to fig. 7, a flow of adaptive control of output frequency according to an embodiment of the present application is shown, which includes the following steps:

s610, step-by-step setting an output frequency of the microwave generator according to a preset frequency.

S620, determining whether the reflected power fed back by the microwave transmission line at each output frequency is smaller than a first reflected power threshold P0.

S630, if not, the output of the microwave generator is turned off.

And S640, if so, extracting the output frequency with the minimum reflected power from the output frequencies.

S650, determine whether the reflected power corresponding to the extracted output frequency is smaller than the second reflected power threshold P1.

S660, if not, taking the extracted output frequency as a starting point, reducing the frequency step, and repeating the steps S610 to S650 until the reflection power corresponding to the extracted output frequency is smaller than the second reflection power threshold, and performing step S670.

And S670, if yes, taking the extracted output frequency as the output frequency of the microwave generator. And repeatedly executing the steps S610 to S650 with the extracted output frequency as a starting point at a certain interval.

Through the self-adaptive operation, the microwave can be fed in under the output power of the microwave generator, the reflected power of the microwave transmission line is smaller than the second reflected power threshold, and the output power is the minimum value in the output power range corresponding to the reflected power smaller than the second reflected power threshold.

Referring to fig. 8, a flow of power adaptive control according to an embodiment of the present application is shown as follows:

and S710, starting timing when the microwave generator starts to work.

S720, judging whether the heating time reaches the preset time, judging whether the temperature of the gas-shaped object generating base body reaches the preset temperature, judging whether the temperature of the microwave transmission line reaches the preset temperature, and judging whether the aerosol quantity generated by the gas-shaped object generating base body reaches the preset aerosol quantity.

And S730, if one or more of the four strips are reached, adjusting the output waveform of the microwave generator into pulse microwaves, synchronously controlling the grid voltage of the microwave power amplifier, and dynamically adjusting the duty ratio of the pulse microwaves, so that the power fed into the microwave transmission line meets the requirement of actual power for generating the required aerosol quantity.

Fig. 9 to 12 respectively show the structures of the microwave heating apparatus according to the embodiment of the present application. The structure of each microwave heating apparatus will be described below:

referring to fig. 9, the microwave heating apparatus includes a microwave generator 1, a microwave power amplifier 2, and a control unit 4. The microwave power amplifier comprises a gain adjusting circuit 201, a grid voltage bias 202, a microwave power amplifier tube cascade 203, an output matching 204, a circulator 205, a detection circuit 206 and an absorption load 207. The aerosol-generating substrate tends to exhibit good frequency band response and good microwave absorption at lower impedances compared to 50 Ω, such as 35 Ω. Thus, the output match 204 is matched to an impedance of 35 Ω, while the circulator 205 port impedance is designed to 35 Ω. Allowing the aerosol-generating substrate 6 to absorb microwave energy more readily while also reducing the loss of microwave power source and accommodating the size of smaller products.

Referring to fig. 10, the microwave heating apparatus includes a microwave generator 1, a microwave power amplifier 2, and a control unit 4. The microwave power amplifier 2 may include a gain adjustment circuit 201, a gate bias 202, a microwave power amplifier tube cascade 203, an output match 204, a circulator 205, a detector circuit 206, and an absorption load 207. Therefore, the output matching 204 can be matched to an impedance of 35 Ω, and at the same time, the port impedance of the circulator 205 can be designed to 35 Ω. Allowing the aerosol-generating substrate 6 to absorb microwave energy more readily while also reducing the loss of microwave power source and accommodating the size of smaller products.

Referring to fig. 11, the microwave heating apparatus may include a microwave generator 1, a microwave power amplifier 2, and a control unit 4. The microwave power amplifier 2 may include a gain adjustment circuit 201, a gate bias 202, a microwave power amplifier tube cascade 203, an output match 204, an isolator 208, and a detector circuit 206. Therefore, the output matching 204 can be matched to 35 Ω, and at the same time, the isolator 208 port impedance can be designed to 35 Ω. Allowing the aerosol-generating substrate 6 to absorb microwave energy more readily while also reducing the loss of microwave power source and accommodating the size of smaller products.

Referring to fig. 12, the microwave heating apparatus may include a microwave generator 1, a microwave power amplifier 2, and a control unit 4. The microwave power amplifier 2 may include a gain adjustment circuit 201, a gate bias 202, a microwave power amplifier tube cascade 203, an output matching 204, and a detection circuit 206. When the aerosol generating substrate 6 presents good impedance at 50 omega characteristic and is not influenced by the ambient temperature, the working efficiency of the microwave power source can be greatly improved, the circuit size is reduced, and the manufacturing cost of the product is reduced.

As an example of the embodiment of the present application, fig. 13 shows a microwave output control apparatus provided in the embodiment of the present application, including:

a working state obtaining module 100, configured to obtain a working state of microwave heating; the operating state includes a state of an object to be heated and a state of a microwave transmission line heating the object to be heated; the object to be heated constitutes a part of the microwave transmission line;

the first parameter determining module 200 is configured to determine, according to the working state, a working parameter of the microwave generator for outputting a microwave signal; wherein the microwave generator is connected with the microwave transmission line.

In some embodiments, the apparatus further comprises:

a second parameter determining module 300, configured to determine, according to the operating state, an operating parameter of the microwave power amplifier for amplifying the microwave signal.

In some embodiments, the operating parameter includes an output frequency of the microwave generator, and the operating state acquiring module 100 includes:

a frequency setting unit for setting the output frequency of the microwave generator at a set frequency interval within a set frequency range;

a state acquisition unit for acquiring a working state of microwave heating at each of the output frequencies; and

the first parameter determination module 200 includes:

and the output frequency determining unit is used for determining the output frequency of the microwave generator according to the working state of each output frequency.

In some embodiments, the state obtaining unit is configured to obtain reflected power of the microwave transmission line subjected to microwave heating at each of the output frequencies.

In some embodiments, the first parameter determining module 200 includes:

the reflected power judging unit is used for judging whether the reflected power is smaller than a first reflected power threshold value or not;

a shut-off output unit for shutting off the output of the microwave generator if the reflected power is greater than the first reflected power threshold;

a holding output unit for holding the output of the microwave generator if the reflected power is less than the first reflected power threshold.

In some embodiments, the first parameter determining module 200 includes:

a frequency range determining unit for determining a range of an output frequency of the microwave generator in a case where a reflected power of the microwave transmission line is lower than a second reflected power threshold value;

a frequency maintaining unit for maintaining the output frequency of the microwave generator within the range.

In some embodiments, the operation state includes at least one of a gas generation amount of the object to be heated, a temperature of the microwave transmission line, and a time period of the microwave heating, and the first parameter determination module 200 includes:

the state judgment unit is used for judging whether the working state reaches a threshold value corresponding to the working state;

and the output waveform determining unit is used for determining the output waveform of the microwave generator if the working state reaches a threshold corresponding to the working state.

In some embodiments, the microwave generator comprises multiple microwave output ports, the microwave transmission line comprises multiple microwave feed ports, and the microwave feed ports are connected to one of the microwave output ports; the operating state includes attributes of the object to be heated and a positional relationship between each of the microwave feed ports and the object to be heated, and the first parameter determination module 200 includes:

and the phase determining unit is used for determining the output phase of each microwave signal fed into each microwave feed-in port by the microwave generator according to the attribute of the object to be heated and the position relation between each microwave feed-in port and the object to be heated.

In some embodiments, the operating parameter of the microwave power amplifier comprises at least one of gain and gate voltage.

The functions of the device can be realized by hardware, and can also be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

As an example of the embodiment of the present application, the embodiment of the present application provides a design, a structure of the microwave output control includes a processor and a memory, the memory is used for a device of the microwave output control to execute a program corresponding to the method of the microwave output control, and the processor is configured to execute the program stored in the memory. The microwave output control device further comprises a communication interface for communicating the microwave output control device with other equipment or a communication network.

The apparatus further comprises:

a communication interface 23 for communication between the processor 22 and an external device.

The memory 21 may comprise a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

If the memory 21, the processor 22 and the communication interface 23 are implemented independently, the memory 21, the processor 22 and the communication interface 23 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 14, but this is not intended to represent only one bus or type of bus.

Optionally, in a specific implementation, if the memory 21, the processor 22 and the communication interface 23 are integrated on a chip, the memory 21, the processor 22 and the communication interface 23 may complete mutual communication through an internal interface.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

The computer readable media of the embodiments of the present application may be computer readable signal media or computer readable storage media or any combination of the two. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable read-only memory (CDROM). Additionally, the computer-readable storage medium may even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

In embodiments of the present application, a computer readable signal medium may comprise a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, input method, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, Radio Frequency (RF), etc., or any suitable combination of the preceding.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware that is related to instructions of a program, and the program may be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium. The storage medium may be a read-only memory, a magnetic or optical disk, or the like.

While the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.