Microwave generating method and device

Abstract

A microwave generation method and device are disclosed. The method is used in a microwave energy atomization device, and includes: a microwave generation module generating an Nth microwave signal (S1), where N is an integer greater than or equal to 1; detecting a feedback signal corresponding to the Nth microwave signal and generating an adjustment signal based on the feedback signal (S2); a microwave control module adjusting a control signal based on the adjustment signal and sending the adjusted control signal to the microwave generation module (S3). After generating a microwave signal, the control signal is adjusted by obtaining a feedback signal that outputs the microwave signal, and the microwave to be generated next is adjusted based on the output status of the microwave signal, thereby enabling timely adjustment of microwave energy absorption efficiency, with advantages such as fast adjustment speed and high accuracy.

Description

[Technical Field]

[0001] The present invention relates to the field of microwave energy atomization devices, and more particularly to microwave generating methods and devices. [Background technology]

[0002] When microwave energy is used to atomize aerosols, it is difficult to completely absorb the microwave energy transmitted to the atomization substrate. However, there is an optimal operating frequency corresponding to the atomization substrate. Microwave energy using this optimal operating frequency is absorbed to the maximum extent by the atomization substrate while minimizing the amount of microwave energy reflected, thereby maximizing energy utilization. During operation, the resistance characteristics of the atomization substrate in the atomizer are constantly changing, so the optimal operating frequency for microwave energy absorption by the atomization substrate also changes. Therefore, to ensure maximum energy utilization, it is necessary to timely adjust the frequency of the microwave energy.

[0003] Currently, microwaves within a certain frequency range are mainly scanned at regular intervals, and parameters such as the voltage standing wave ratio or return loss of the microwaves at different frequencies are calculated and compared to find the optimal parameters, and the frequency corresponding to the optimal parameters is used as the frequency of the microwave to be generated.Frequency scanning consumes a large amount of computing resources and has problems such as slow scanning speed and low scanning accuracy, which significantly affect the microwave energy absorption efficiency, high power consumption, and equipment overheating. Summary of the Invention [Problem to be solved by the invention]

[0004] The technical problem that the present invention aims to solve is to provide an improved method and apparatus for generating microwaves. [Means for solving the problem]

[0005] To solve the technical problems, the technical solutions adopted by the present invention are as follows: A microwave generating method for use in a microwave energy atomization device is provided, the method comprising: a microwave generating module generating an N-th microwave signal (N is an integer equal to or greater than 1); detecting a feedback signal corresponding to the Nth microwave signal and generating an adjustment signal based on the feedback signal; The microwave control module adjusts a control signal based on the adjustment signal and transmits the adjusted control signal to the microwave generating module.

[0006] Preferably, when N is equal to 1, the step of generating an Nth microwave signal by the microwave generation module includes the steps of obtaining a predetermined control signal and generating the Nth microwave signal having a corresponding frequency based on the predetermined control signal; When N is greater than 1, the step of the microwave generating module generating the Nth microwave signal includes the step of obtaining the control signal, and adjusting the frequency of the (N-1)th microwave signal based on the control signal to generate the Nth microwave signal.

[0007] Preferably, the step of adjusting the frequency of the (N-1)th microwave signal based on the control signal to generate the Nth microwave signal comprises: The step of comparing the control signal with predetermined parameter conditions and adjusting the frequency of the (N-1)th microwave signal to generate the Nth microwave signal.

[0008] Preferably, the predetermined parameters include a first signal value and a second signal value; comparing the control signal to predetermined parameter conditions and adjusting the frequency of the (N-1)th microwave signal to generate the Nth microwave signal; When the control signal is equal to or less than the first signal value, setting the frequency of the (N-1)th microwave signal to a generation frequency of the Nth microwave signal; When the control signal is greater than the first signal value and less than the second signal value, increasing the frequency of the (N-1)th microwave signal based on the control signal, and setting the increased frequency as a generation frequency of the Nth microwave signal; When the control signal is equal to or greater than the second signal value, acquiring the predetermined control signal and setting the frequency corresponding to the predetermined control signal as the generation frequency of the N-th microwave signal; Or, When the control signal is equal to or less than the first signal value, setting the frequency of the (N-1)th microwave signal to a generation frequency of the Nth microwave signal; When the control signal is greater than the first signal value and less than the second signal value, reducing the frequency of the (N-1)th microwave signal based on the control signal, and setting the reduced frequency as a generation frequency of the Nth microwave signal; When the control signal is equal to or greater than the second signal value, the method includes acquiring the predetermined control signal and setting the frequency corresponding to the predetermined control signal as the generation frequency of the Nth microwave signal.

[0009] Preferably, the predetermined parameters include the first signal value, the second signal value, the third signal value and the fourth signal value; comparing the control signal to predetermined parameter conditions and adjusting the frequency of the (N-1)th microwave signal to generate the Nth microwave signal; When the control signal is equal to or less than the first signal value or equal to or more than the second signal value, acquiring the predetermined control signal and setting a frequency corresponding to the predetermined control signal as a generation frequency of the N-th microwave signal; When the control signal is greater than the first signal value and equal to or less than the third signal value, increasing the frequency of the (N-1)th microwave signal based on the control signal, and setting the increased frequency as a generation frequency of the Nth microwave signal; When the control signal is greater than the third signal value and equal to or less than the fourth signal value, setting the frequency of the (N-1)th microwave signal to a generation frequency of the Nth microwave signal; When the control signal is greater than the fourth signal value and less than the second signal value, reducing the frequency of the (N-1)th microwave signal based on the control signal and setting the reduced frequency as the generation frequency of the Nth microwave signal.

[0010] Preferably, the step of generating the microwave signal for the Nth time by the microwave generating module further comprises the step of adjusting the microwave signal to a set power.

[0011] Preferably, the feedback signal includes a forward microwave power and a backward microwave power, the forward microwave power being the power for transmitting the microwave signal to the outside, and the backward microwave power being the backward microwave power of the received microwave signal.

[0012] Preferably, the step of generating an adjustment signal based on the feedback signal comprises: calculating a voltage standing wave ratio based on the feedback signal; and generating the adjustment signal based on the voltage standing wave ratio; or calculating a return loss based on the feedback signal; and generating the adjustment signal based on the return loss; or generating the adjustment signal based on a difference between the forward microwave power and the reverse microwave power; or generating the adjustment signal based on the backward microwave power.

[0013] Preferably, the method further includes a step of the microwave control module acquiring the predetermined control signal before the step of the microwave control module adjusting the control signal based on the adjustment signal; The step of the microwave control module adjusting the control signal based on the adjustment signal includes adjusting the control signal based on a difference between the adjustment signal and the predetermined control signal.

[0014] Preferably, the predetermined control signal is a predetermined voltage signal that is set in advance, and the predetermined voltage signal is a voltage that is converted when the voltage standing wave ratio reaches a required value.

[0015] The present invention further provides a microwave generating device, including a microwave generating module, a detection module and a microwave control module; the microwave generation module generates an N-th microwave signal (N is an integer equal to or greater than 1) and acquires a control signal transmitted from the microwave control module; The detection module is connected to the microwave generating module, and detects a feedback signal corresponding to the Nth microwave signal, and generates an adjustment signal based on the feedback signal; The microwave control module is respectively connected to the microwave generating module and the detection module, acquires the adjustment signal, adjusts the control signal based on the adjustment signal, and sends the adjusted control signal to the microwave generating module.

[0016] Preferably, the microwave generating module includes a signal source module and a power amplifier; a first end of the signal source module is connected to the microwave control module, a second end of the signal source module is connected to a first end of the power amplifier, and a second end of the power amplifier is connected to the detection module; The signal source module obtains a predetermined control signal when N is equal to 1, and generates the Nth microwave signal having a corresponding frequency according to the predetermined control signal; and obtains the control signal when N is greater than 1, and adjusts the frequency of the (N-1)th microwave signal according to the control signal to generate the Nth microwave signal; The power amplifier adjusts the microwave signal to a set power.

[0017] Preferably, the signal source module further compares the control signal with a predetermined parameter condition, and adjusts a frequency of the N-1th microwave signal to generate the Nth microwave signal.

[0018] Preferably, the feedback signal includes a forward microwave power and a backward microwave power, and the detection module includes a feedback signal detection module and a feedback signal conversion module; a first end of the feedback signal detection module is connected to the microwave generating module, a second end of the feedback signal detection module is connected to the first end of the feedback signal conversion module, and a second end of the feedback signal conversion module is connected to the microwave control module; the feedback signal detection module detects the forward microwave power and the reverse microwave power; The feedback signal conversion module generates an adjustment signal based on the feedback signal.

[0019] Preferably, the feedback signal detection module includes a first coupler, a second coupler, and a circulator; a first end of the first coupler is connected to the microwave generating module, a second end is connected to the input end of the circulator, and a third end is connected to the feedback signal converting module, the first coupler detects the forward microwave power and transmits the forward microwave power to the feedback signal converting module; a first end of the second coupler is connected to the split end of the circulator, and a second end of the second coupler is connected to the feedback signal conversion module, the circulator splits the backward microwave power, and the second coupler detects the backward microwave power and transmits the backward microwave power to the feedback signal conversion module; or the feedback signal detection module includes a third coupler; The first end of the third coupler is connected to the microwave generating module, and the second and third ends of the third coupler are connected to the feedback signal converting module, which detects the forward microwave power and the backward microwave power, and transmits the forward microwave power to the feedback signal converting module via the second end and the backward microwave power to the feedback signal converting module via the third end.

[0020] Preferably, the microwave control module includes a differential amplifier circuit that adjusts the control signal based on a difference between the adjusted signal and the predetermined control signal. [Effects of the Invention]

[0021] The microwave generating method and apparatus embodying the present invention have the following beneficial effects: after generating a microwave signal, a feedback signal for outputting the microwave signal is obtained to adjust the control signal, and the microwave to be generated next is adjusted based on the output status of the microwave signal, thereby enabling timely adjustment of the microwave energy absorption efficiency, with advantages such as fast adjustment speed and high accuracy. [Brief explanation of the drawings]

[0022] The present invention will now be further described with reference to the drawings and examples. [Figure 1] 1 is a structural schematic diagram of a microwave generating device according to some embodiments of the present invention; [Figure 2] FIG. 1 is a flow diagram of a microwave generation method according to some embodiments of the present invention. [Figure 3] FIG. 2 is a voltage vs. frequency diagram of a microwave generating module according to some embodiments of the present invention. [Figure 4] 2 is a structural schematic diagram of a feedback signal detection module according to some embodiments of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0023] In order to make the technical features, objects and effects of the present invention more clearly understandable, specific embodiments of the present invention will now be described in detail with reference to the drawings.

[0024] When one element is described as being "connected" to another element, it may be directly or indirectly connected to the other element. Terms such as "first," "second," etc. do not indicate or imply relative importance, nor do they implicitly indicate the number of technical features, but are merely for description purposes. The above terms do not limit the present technical solution, but are merely used for ease of description.

[0025] The microwave-generating method and apparatus provided by the present invention are used in microwave energy atomization devices that use microwaves to heat and atomize an atomization substrate to generate an aerosol. The atomization substrate may be a solid aerosol-forming matrix, such as a treated plant leaf product, although in some other embodiments the atomization substrate may be a liquid aerosol-forming matrix.

[0026] The microwave energy atomization device includes a substrate fixing base for fixing the atomization substrate, an atomization chamber, a transmitting antenna, a microwave generating device, a power supply battery, and a housing. The substrate fixing base accommodates and fixes the atomization substrate, and the power supply battery supplies power to the microwave energy atomization device, with the microwave generating device and the power supply battery being disposed within the housing. The transmitting antenna is disposed at the bottom of the atomization chamber or another suitable location and attached adjacent to the housing to transmit a microwave signal. The microwave energy atomization device further includes a microwave focusing device, with the transmitting antenna disposed within the microwave focusing device. The transmitting antenna radiates microwaves, and the microwave focusing device focuses at least a portion of the microwaves radiated from the transmitting antenna onto the atomization chamber at a position where the atomization substrate is disposed, thereby heating the atomization substrate.

[0027] As shown in FIG. 1, in one embodiment, the microwave generating device includes a microwave generating module 1, a detection module 2 and a microwave control module.

[0028] The microwave generating module 1 generates an Nth (N is an integer equal to or greater than 1) microwave signal and receives the control signal transmitted from the microwave control module. Specifically, the microwave generating module 1 is connected to the microwave control module and the detection module 2, and after generating a microwave signal, transmits the microwave signal to the transmitting antenna via the detection module 2, and the transmitting antenna transmits the microwave signal. The microwave generating module 1 also receives an external start signal and stop signal and operates under the control of the start signal and stop signal.

[0029] In a preferred embodiment, the microwave generation module 1 includes a signal source module and a power amplifier, a first end of the signal source module is connected to the microwave control module, a second end of the signal source module is connected to a first end of the power amplifier, and the second end of the power amplifier is connected to the detection module 2. The signal source module obtains a predetermined control signal and generates an Nth microwave signal having a corresponding frequency based on the predetermined control signal when N is equal to 1, and obtains a control signal and adjusts the frequency of the (N-1)th microwave signal based on the control signal to generate the Nth microwave signal when N is greater than 1. The power amplifier adjusts the microwave signal to a set power to control the frequency and power of the microwave generation.

[0030] Specifically, the signal source module includes a voltage-controlled oscillator, whose output frequency corresponds to the input control voltage. When generating a first microwave signal, the voltage-controlled oscillator receives a predetermined control signal and generates a microwave signal with a default frequency based on the predetermined control signal. When generating subsequent microwave signals, the voltage-controlled oscillator modifies the frequency of the generated microwave signal based on the control signal in consideration of the previous microwave signal, thereby adjusting the frequency of the microwave signal in real time based on the transmission efficiency of the previous microwave signal transmitted to the outside via the transmitting antenna. Furthermore, because the microwave signal generated by the voltage-controlled oscillator has a low power, a power amplifier amplifies the microwave signal output from the signal source module to a required power value. For example, a transistor with model number BLM2425M9S20 or other device is used to amplify the power of the microwave signal.

[0031] In a preferred embodiment, the signal source module further compares the control signal with a predetermined parameter condition and adjusts the frequency of the (N-1)th microwave signal to generate the Nth microwave signal, specifically by adding some resistors or other devices to control the voltage controlled oscillator to specifically request adjustment of the frequency of the microwave signal only when the control signal meets the predetermined parameter condition, thereby avoiding unconstrained and frequent adjustment of the frequency of the microwave signal and ensuring the safety of the device.

[0032] The detection module 2 is connected between the transmitting antenna and the microwave generating module 1 and detects a feedback signal corresponding to the Nth microwave signal transmitted by the transmitting antenna. The detection module 2 generates an adjustment signal based on the feedback signal. Specifically, the microwave signal is output via the detection module 2. For example, the microwave signal is output to the transmitting antenna, which then transmits the microwave signal to the atomization substrate. Because the resistance of the transmitting antenna and the atomization substrate do not perfectly match, not all microwaves are absorbed by the atomization substrate, and the unabsorbed microwaves are reflected and received by the antenna. Therefore, the detection module detects the microwave signal transmitted from the transmitting antenna and the reflected microwave signal, and analyzes them in real time to obtain the absorption efficiency of the microwave signal having the corresponding frequency in the atomization substrate. The adjustment signal is then generated, thereby dynamically adjusting the microwave signal generation frequency based on the microwave absorption efficiency in the atomization substrate.

[0033] In a preferred embodiment, the feedback signal includes forward microwave power and backward microwave power, and the detection module 2 includes a feedback signal detection module and a feedback signal conversion module. A first end of the feedback signal detection module is connected to the microwave generating module 1, a second end of the feedback signal detection module is connected to the first end of the feedback signal conversion module, and a second end of the feedback signal conversion module is connected to the microwave control module. The feedback signal detection module detects the forward microwave power and the backward microwave power. The feedback signal conversion module generates an adjustment signal based on the feedback signal.

[0034] Specifically, the forward microwave power is the microwave power radiated by the transmitting antenna to the atomized substrate, and the backward microwave power is the microwave power received by the transmitting antenna and reflected back. The feedback signal detection module detects the forward microwave power and the backward microwave power, and then transmits them to the feedback signal conversion module, which converts the feedback signal into a corresponding electrical signal.

[0035] 4, in a preferred embodiment, the feedback signal detection module includes a first coupler 4, a second coupler 5, and a circulator 3. The first coupler 4 has a first end connected to the microwave generating module, a second end connected to the input end of the circulator 3, a third end connected to the feedback signal converting module, and a fourth end connected to a resistor, and the first coupler 4 detects the forward microwave power and transmits the forward microwave power to the feedback signal converting module. The second coupler 5 has a first end connected to the isolated end of the circulator, a second end connected to the feedback signal converting module, and a third end connected to another resistor. The circulator 3 separates the backward microwave power, and the second coupler 5 detects the backward microwave power and transmits it to the feedback signal converting module.

[0036] Specifically, when the microwave signal passes through the first coupler 4, the first coupler 4 combines the forward microwave power according to a certain ratio to detect the forward microwave power; the microwave signal passing through the first coupler 4 is input to the input end of the circulator 3 and then output from the output end to the transmitting antenna; the microwave signal is transmitted to the atomization substrate via the transmitting antenna, and then a portion of it is reflected by the transmitting antenna to form a backward microwave signal; the backward microwave signal enters the output end of the circulator, is separated by the circulator, and reaches the separating end to be transmitted to the second coupler 5; the second coupler 5 also combines the backward microwave power according to a certain ratio to detect the backward microwave power.

[0037] Alternatively, in another preferred embodiment, the feedback signal detection module includes a third coupler, a first end of which is connected to the microwave generating module, and a second and third ends of which are connected to the feedback signal converting module, for detecting forward microwave power and backward microwave power, and transmitting the forward microwave power to the feedback signal converting module via the second end and the backward microwave power to the feedback signal converting module via the third end.

[0038] Specifically, a bidirectional coupler is adopted for the third coupler. When the microwave signal passes through the third coupler, the third coupler combines the forward microwave power according to a certain ratio to detect the forward microwave power. The microwave signal passing through the third coupler reaches the transmitting antenna, which transmits the microwave signal to the atomization substrate through the transmitting antenna. After that, a part of the microwave signal is reflected by the transmitting antenna to form a backward microwave signal, which is then transmitted to the third coupler to combine the backward microwave power according to a certain ratio to detect the backward microwave power.

[0039] In a preferred embodiment, the feedback signal conversion module generates an adjustment signal based on the feedback signal. The feedback signal conversion module uses a power detector to convert based on the input power signal and output a voltage signal. For example, it uses a MAX2016 power detector, an LT5581 power detector, etc.

[0040] The microwave control module is respectively connected to the microwave generation module 1 and the detection module 2, obtains the adjustment signal, adjusts the control signal based on the adjustment signal, and transmits the adjusted control signal to the microwave generation module 1.

[0041] In a preferred embodiment, the microwave control module includes a differential amplification circuit that adjusts the control signal based on the difference between the adjustment signal and a predetermined control signal. Specifically, the differential amplification circuit outputs a voltage that proportionally amplifies the difference in voltage between the two input terminals, proportionally amplifies the difference in the two voltage signals of the adjustment signal and the predetermined control signal, that is, outputs the control signal. The specific amplification factor is related to the specific circuit installation of the differential amplification circuit.

[0042] In a preferred embodiment, the predetermined control signal is a preset predetermined voltage signal, and the predetermined voltage signal is the voltage converted when the voltage standing wave ratio (VSWR) reaches the required value. Specifically, the predetermined control signal does not change, and when VSWR < X, it is the pre-converted voltage. The value of X may vary according to actual needs, for example, it is 1.5, 1.4, etc. Since the resistance of the atomizing base material has changed, the default frequency corresponding to the predetermined control signal is not necessarily the optimal operating frequency. Therefore, the predetermined control signal and the adjustment signal are combined to adjust the control signal input to the microwave generation module 1.

[0043] [[ID=]] The operation process of the microwave generating device of this embodiment is as follows: after receiving a start signal, the microwave generating module 1 obtains a predetermined control signal as a control signal, generates microwaves having a frequency corresponding to the predetermined control signal, and transmits them to the transmitting antenna via the detection module 2, the transmitting antenna radiates the microwaves to the atomization substrate, the detection module 2 detects the feedback signal and generates an adjustment signal, the microwave control module adjusts the control signal based on the adjustment signal, the microwave generating module 1 adjusts or continuously maintains the microwave generation power based on the control signal, and then continuously outputs microwaves via the detection module, and this cycle is repeated until the microwave generating module 1 receives a stop signal.

[0044] The microwave generating device of this embodiment uses negative feedback automatic control logic to realize automatic frequency tracking of a hardware circuit, and the speed of automatic frequency tracking depends on the conversion speed of the hardware, which is much faster than the frequency tracking speed of software control, and does not need to consume computing resources of the control module.

[0045] As shown in Figure 2, Figure 2 is a flow diagram of one embodiment of the microwave generating method provided by the present invention. The microwave generating method of this embodiment is used in a microwave energy atomization device, and includes the following steps: S1: The microwave generating module generates a microwave signal for the Nth time (N is an integer greater than or equal to 1). Specifically, after receiving a start signal sent from the external control system, the microwave generating module 1 continuously generates a microwave signal based on the input voltage, which reaches the transmitting antenna through the detection module 2, and radiates the microwave to the atomization substrate through the transmitting antenna. The microwave generating module 1 stops operating until it receives a stop signal sent from the external control system.

[0046] In a preferred embodiment, the predetermined control signal is a predetermined voltage signal set in advance, and the predetermined voltage signal is a voltage that is converted when the voltage standing wave ratio (VSWR) reaches a required value. Specifically, the predetermined control signal is a voltage converted according to the actual needs of the value of the voltage standing wave ratio, that is, the voltage converted when VSWR < X. The value of X may vary according to actual needs, for example, 1.5, 1.4, etc. The voltage standing wave ratio measures the efficiency of transmitting microwave power to the atomizing substrate through the transmitting antenna. When the resistances of the two do not match, some microwave power is reflected, thereby reducing the power transmitted to the atomizing substrate. The higher the reflected power, the larger the voltage standing wave ratio.

[0047] In a preferred embodiment, when N is equal to 1, in step S1, the step of the microwave generation module generating the Nth microwave signal includes obtaining a predetermined control signal and generating the Nth microwave signal having a corresponding frequency based on the predetermined control signal. When N is greater than 1, in step S1, the step of the microwave generation module generating the Nth microwave signal includes obtaining a control signal, adjusting the frequency of the (N - 1)th microwave signal based on the control signal, and generating the Nth microwave signal.

[0048] Specifically, when generating the first microwave signal, after obtaining the predetermined control signal, a microwave signal having a default frequency is generated based on the predetermined control signal. For example, referring to FIG. 3, when the predetermined control signal is 1V, based on the input voltage of 1V, the voltage-controlled oscillator outputs a default microwave signal with a frequency of 2.45 GHz and a power of 0 dBm.

[0049] When generating the microwave signal after the first time, the frequency of the microwave signal generated based on the control signal is adjusted based on the previous microwave signal, thereby adjusting the frequency of the microwave signal in real time based on the transmission efficiency of transmitting the previous microwave signal to the outside through the transmitting antenna.

[0050] In a preferred embodiment, step S1 further includes adjusting the microwave signal to a set power. Specifically, since the power of the microwave signal generated by the voltage-controlled oscillator is low, the power of the microwave signal is amplified to a power value that meets requirements. For example, the power of the microwave signal is amplified from 0 dBm to 40 dBm, where Bm represents an absolute power value based on a power of 1 mW.

[0051] S2: Detect a feedback signal corresponding to the Nth microwave signal, and generate an adjustment signal based on the feedback signal. Specifically, the detection module 2 detects the feedback signal corresponding to the emitted microwave to obtain the absorption status of the microwave with the corresponding frequency in the atomization substrate, and the adjustment signal generated based on the feedback signal can adjust the control signal to further adjust the microwave frequency, so that the generated microwave energy can be maximally absorbed by the atomization substrate.

[0052] In a preferred embodiment, the feedback signal includes forward microwave power and backward microwave power, where the forward microwave power is the power of the microwave signal transmitted to the outside, and the backward microwave power is the backward microwave power of the received microwave signal. Specifically, microwaves that are not absorbed by the atomization substrate are reflected and received by the antenna, and this power is the backward microwave power, and the forward microwave power is the microwave power radiated from the transmitting antenna to the atomization substrate. The forward microwave power and the backward microwave power can be detected using a coupler or circulator.

[0053] For example, the amplified first microwave signal has a frequency of 2.45 GHz and a power of 40 dBm. When it reaches the feedback signal detection module, some of the power is coupled. Assuming the coupling coefficient is -20 dBm, the power of the forward microwave detected by the feedback signal detection module is 40 dBm-20 dBm=20 dBm. Furthermore, the power of the first microwave signal passing through the feedback signal detection module is attenuated by 1 dBm. When it reaches the transmitting antenna, the frequency of the first microwave signal is 2.45 GHz and the power is 39 dBm (7.943 W). Assuming the frequency of the backward microwave returning to the transmitting antenna is 2.45 GHz and the power is 36 dBm (3.981 W), the power reflection rate in this case is approximately 50%, and the power of the backward microwave detected by the feedback signal detection module is 36 dBm-20 dBm=16 dBm. Since the coupling coefficient is constant, the transmission efficiency of the microwave signal can be obtained by detecting only the combined portion of the forward microwave power and the backward microwave power.

[0054] In a preferred embodiment, in step S2, generating an adjustment signal based on the feedback signal includes calculating a voltage standing wave ratio based on the feedback signal and generating an adjustment signal based on the voltage standing wave ratio, or calculating a return loss based on the feedback signal and generating an adjustment signal based on the return loss, or generating an adjustment signal based on a difference between forward microwave power and reverse microwave power, or generating an adjustment signal based on the reverse microwave power.

[0055] Specifically, for a constant power of the forward microwave signal, the smaller the power of the reverse microwave signal, the higher the absorption efficiency of the microwave signal. Therefore, the microwave control module can evaluate the absorption efficiency of the microwave signal at the current frequency using the adjustment signal generated based on the feedback signal. Therefore, the adjustment signal can be obtained by converting the voltage standing wave ratio, return loss, reverse microwave power value, or the difference between the forward and reverse microwave powers and outputting a voltage signal. For example, based on a reverse microwave power value of 16 dBm, the converted adjustment signal is 1.6 V. Based on the difference between the forward and reverse microwave powers of 4 dBm, the converted adjustment signal is 0.4 V. Based on a voltage standing wave ratio value of 3, the converted adjustment signal is 0.3 V. Based on a return loss of 6 dB, the converted adjustment signal is 0.6 V.

[0056] S3: The microwave control module adjusts the control signal based on the adjustment signal and sends the adjusted control signal to the microwave generating module 1. Specifically, since the transmission efficiency varies depending on the frequency of the microwave signal, it is necessary to find an appropriate microwave signal frequency that meets the transmission efficiency requirements. The control signal input to the microwave generating module 1 is adjusted based on the adjustment signal and the adjusted control signal is sent to the microwave generating module 1, and the microwave generating module 1 adjusts the frequency of the microwave signal based on the adjusted control signal. By dynamically adjusting the frequency of the microwave signal, it can adapt to continuous changes in resistance.

[0057] In a preferred embodiment, the method further includes a step before step S3 in which the microwave control module acquires a predetermined control signal, and in step S3, the step of the microwave control module adjusting the control signal based on the adjustment signal includes a step of adjusting the control signal based on a difference between the adjustment signal and the predetermined control signal. Specifically, the adjustment signal and the predetermined control signal are input to a differential amplifier circuit, and converted at a certain ratio based on the difference in voltage between the adjustment signal and the predetermined control signal to acquire the control signal.

[0058] For example, when generating a microwave signal for the first time, based on the backward microwave power value, the converted regulating signal is 1.6 V, and the predetermined control signal is 1 V, and the difference between the two is 0.6 V. If the difference between the two is assumed to be the control signal, the control signal is 0.6 V. Since the regulating signals obtained according to different conversion methods are different, the specific conversion relationship between the difference between the two should also be adjusted accordingly.

[0059] In a preferred embodiment, in step S1, adjusting the frequency of the (N-1)th microwave signal based on the control signal to generate the Nth microwave signal includes comparing the control signal with predetermined parameter conditions and adjusting the frequency of the (N-1)th microwave signal to generate the Nth microwave signal. Specifically, according to actual needs, the frequency of the microwave signal cannot be increased or decreased infinitely. Therefore, some conditions are set to compare the control signal with the parameter conditions, and the frequency of the microwave signal is controlled according to the conditions.

[0060] In a preferred embodiment, the predetermined parameters include a first signal value and a second signal value. In step S1, the step of comparing the control signal with a predetermined parameter condition and adjusting the frequency of the (N-1)th microwave signal to generate the Nth microwave signal includes the steps of: if the control signal is equal to or less than the first signal value, setting the frequency of the (N-1)th microwave signal as the generation frequency of the Nth microwave signal; if the control signal is greater than the first signal value and less than the second signal value, increasing the frequency of the (N-1)th microwave signal based on the control signal and setting the increased frequency as the generation frequency of the Nth microwave signal; and if the control signal is equal to or greater than the second signal value, obtaining the predetermined control signal and setting the frequency corresponding to the predetermined control signal as the generation frequency of the Nth microwave signal.

[0061] For example, referring to FIG. 3 , the first signal value VA is 0.5V, the second signal value VB is 2V, and the frequency increases by 0.05 GHz for every 1V increase in voltage. If the frequency of the (N-1)th microwave signal is 2.45 GHz and the control signal obtained based on the (N-1)th microwave signal is 0.6V, the frequency is increased by 0.03 GHz, corresponding to a frequency increase of 0.6V in the voltage, and the generated frequency of the Nth microwave signal is 2.48 GHz. If the control signal obtained based on the Nth microwave signal is 0.4V, the frequency remains unchanged, and the generated frequency of the (N+1)th microwave signal remains 2.48 GHz. If the control signal obtained based on the (N+1)th microwave signal is 2.1V, the frequency is reset to the default frequency corresponding to a predetermined control signal of 1V, and the generated frequency of the (N+2)th microwave signal is 2.45 GHz.

[0062] In another preferred embodiment, in step S1, the step of comparing the control signal with a predetermined parameter condition and adjusting the frequency of the (N-1)th microwave signal to generate the Nth microwave signal includes the steps of: when the control signal is less than or equal to a first signal value, setting the frequency of the (N-1)th microwave signal as the generation frequency of the Nth microwave signal; and when the control signal is greater than the first signal value and less than a second signal value, reducing the frequency of the (N-1)th microwave signal based on the control signal, and setting the reduced frequency as the generation frequency of the Nth microwave signal.

[0063] For example, referring to FIG. 3 , the first signal value VA is 0.5V and the second signal value VB is 2V. If the frequency of the (N-1)th microwave signal is 2.45 GHz and the control signal obtained based on the (N-1)th microwave signal is 0.6V, the frequency is reduced by 0.03 GHz, which corresponds to a frequency that reduces the voltage by 0.6V, and the generated frequency of the Nth microwave signal is 2.42 GHz. If the control signal obtained based on the Nth microwave signal is 0.4V, the frequency does not change and the generated frequency of the (N+1)th microwave signal remains 2.42 GHz. If the control signal obtained based on the (N+1)th microwave signal is 2.1V, the frequency is reset to the default frequency corresponding to a predetermined control signal of 1V, and the generated frequency of the (N+2)th microwave signal is 2.45 GHz.

[0064] In one preferred embodiment, the predetermined parameters include a first signal value, a second signal value, a third signal value, and a fourth signal value. In step S1, the step of comparing the control signal with the predetermined parameter conditions and adjusting the frequency of the (N-1)th microwave signal to generate the Nth microwave signal includes: The method includes the steps of: acquiring a predetermined control signal when the control signal is equal to or less than a first signal value or equal to or more than a second signal value, and setting a frequency corresponding to the predetermined control signal as a generation frequency of the N-th microwave signal; increasing the frequency of the (N-1)th microwave signal based on the control signal when the control signal is greater than the first signal value and equal to or less than a third signal value, and setting the increased frequency as the generation frequency of the N-th microwave signal; when the control signal is greater than the third signal value and equal to or less than a fourth signal value, setting the frequency of the (N-1)th microwave signal as the generation frequency of the N-th microwave signal; and reducing the frequency of the (N-1)th microwave signal based on the control signal when the control signal is greater than the fourth signal value and less than the second signal value, and setting the reduced frequency as the generation frequency of the N-th microwave signal.

[0065] For example, referring to FIG. 3 , the first signal value VA is 0.5V, the second signal value VB is 2V, the third signal value Va is 1V, and the fourth signal value Vb is 1.5V. If the frequency of the (N-1)th microwave signal is 2.45 GHz and the control signal obtained based on the (N-1)th microwave signal is 0.8V, the frequency increase step is increased by 0.04 GHz, which corresponds to a frequency that increases the voltage by 0.8V, and the generated frequency of the Nth microwave signal is 2.49 GHz. If the control signal obtained based on the Nth microwave signal is 1.1V, the frequency does not change, and the generated frequency of the (N+1)th microwave signal remains 2.49 GHz. If the control signal obtained based on the (N+1)th microwave signal is 1.6V, the frequency decrease step is decreased by 0.08 GHz, which corresponds to a frequency that decreases the voltage by 1.6V, and the generated frequency of the (N+2)th microwave signal is 2.41 GHz. If the control signal obtained based on the (N+2)th microwave signal is 2.1V or 0.4V, it is reset to the default frequency corresponding to the predetermined control signal of 1V, and the generated frequency of the (N+3)th microwave signal becomes 2.45GHz.

[0066] The microwave generation method of this embodiment uses negative feedback automatic control logic to realize automatic frequency tracking of a hardware circuit, and the speed of automatic frequency tracking depends on the conversion speed of the hardware, which is much faster than the frequency tracking speed of software control, and does not require consuming computing resources of the control module.

[0067] Each embodiment of the present specification is described step by step, and each embodiment is described mainly by focusing on the differences from other embodiments. Identical or similar parts between the embodiments can be mutually referenced.

[0068] The above examples only represent some embodiments of the present invention, and although the description is specific and detailed, it cannot be understood as limiting the patent scope of the present invention. It should be noted that those skilled in the art may freely combine the above technical features and make some modifications and improvements without departing from the concept of the present invention, and all of these belong to the protection scope of the present invention, and therefore, all equivalent modifications and modifications completed within the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A microwave generating method for use in a microwave energy atomizing device, comprising: a microwave generating module generating an Nth microwave signal (N is an integer equal to or greater than 1); detecting a feedback signal corresponding to the Nth microwave signal and generating an adjustment signal based on the feedback signal; a step of a microwave control module adjusting a control signal based on the adjustment signal and transmitting the adjusted control signal to the microwave generation module.

2. When N is equal to 1, the step of generating an Nth microwave signal by the microwave generation module includes the steps of obtaining a predetermined control signal and generating the Nth microwave signal having a corresponding frequency based on the predetermined control signal; 2. The microwave generating method according to claim 1, wherein when N is greater than 1, the step of generating an N-th microwave signal by the microwave generating module includes the steps of: acquiring the control signal; and adjusting a frequency of the (N-1)th microwave signal based on the control signal to generate the N-th microwave signal.

3. adjusting a frequency of the (N-1)th microwave signal based on a control signal to generate the Nth microwave signal, 3. The microwave generating method of claim 2, further comprising the step of comparing the control signal with predetermined parameter conditions and adjusting a frequency of the (N-1)th microwave signal to generate the Nth microwave signal.

4. the predetermined parameters include a first signal value and a second signal value; comparing the control signal to predetermined parameter conditions and adjusting the frequency of the (N-1)th microwave signal to generate the Nth microwave signal; When the control signal is equal to or less than the first signal value, setting the frequency of the (N-1)th microwave signal to a generation frequency of the Nth microwave signal; When the control signal is greater than the first signal value and less than the second signal value, increasing the frequency of the (N-1)th microwave signal based on the control signal, and setting the increased frequency as a generation frequency of the Nth microwave signal; When the control signal is equal to or greater than the second signal value, acquiring the predetermined control signal and setting the frequency corresponding to the predetermined control signal as the generation frequency of the N-th microwave signal; Or, When the control signal is equal to or less than the first signal value, setting the frequency of the (N-1)th microwave signal to a generation frequency of the Nth microwave signal; When the control signal is greater than the first signal value and less than the second signal value, reducing the frequency of the (N-1)th microwave signal based on the control signal, and setting the reduced frequency as a generation frequency of the Nth microwave signal; and when the control signal is equal to or greater than the second signal value, acquiring the predetermined control signal and setting a frequency corresponding to the predetermined control signal as a generation frequency of the N-th microwave signal.

5. the predetermined parameters include a first signal value, a second signal value, a third signal value, and a fourth signal value; comparing the control signal to predetermined parameter conditions and adjusting the frequency of the (N-1)th microwave signal to generate the Nth microwave signal; When the control signal is equal to or less than the first signal value or equal to or more than the second signal value, acquiring the predetermined control signal and setting a frequency corresponding to the predetermined control signal as a generation frequency of the N-th microwave signal; When the control signal is greater than the first signal value and equal to or less than the third signal value, increasing the frequency of the (N-1)th microwave signal based on the control signal, and setting the increased frequency as a generation frequency of the Nth microwave signal; When the control signal is greater than the third signal value and equal to or less than the fourth signal value, setting the frequency of the (N-1)th microwave signal to a generation frequency of the Nth microwave signal; and when the control signal is greater than the fourth signal value and less than the second signal value, reducing the frequency of the (N-1)th microwave signal based on the control signal, and setting the reduced frequency as a generation frequency of the Nth microwave signal.

6. 2. The microwave generating method of claim 1, wherein the step of generating the microwave signal N times by the microwave generating module further comprises the step of adjusting the microwave signal to a set power.

7. 2. The microwave generating method of claim 1, wherein the feedback signal includes a forward microwave power and a backward microwave power, the forward microwave power being a power for transmitting the microwave signal to an external source, and the backward microwave power being a backward microwave power of the received microwave signal.

8. generating an adjustment signal based on the feedback signal; calculating a voltage standing wave ratio based on the feedback signal; and generating the adjustment signal based on the voltage standing wave ratio; or calculating a return loss based on the feedback signal; and generating the adjustment signal based on the return loss; or generating the adjustment signal based on a difference between the forward microwave power and the reverse microwave power; or The method of claim 7, further comprising generating the adjustment signal based on the backward microwave power.

9. The method further includes a step of the microwave control module acquiring a predetermined control signal before the step of the microwave control module adjusting the control signal based on the adjustment signal; 2. The microwave generating method of claim 1, wherein the step of the microwave control module adjusting the control signal based on the adjustment signal includes adjusting the control signal based on a difference between the adjustment signal and the predetermined control signal.

10. 10. The microwave generating method according to claim 2 or 9, wherein the predetermined control signal is a predetermined voltage signal that is set in advance, and the predetermined voltage signal is a voltage that is converted when a voltage standing wave ratio reaches a required value.

11. A microwave generating device including a microwave generating module, a detection module, and a microwave control module; the microwave generation module generates an N-th microwave signal (N is an integer equal to or greater than 1), and acquires a control signal transmitted from the microwave control module; The detection module is connected to the microwave generating module, and detects a feedback signal corresponding to the Nth microwave signal, and generates an adjustment signal based on the feedback signal; The microwave control module is connected to the microwave generation module and the detection module, respectively, and is configured to acquire the adjustment signal, adjust the control signal based on the adjustment signal, and transmit the adjusted control signal to the microwave generation module.

12. the microwave generating module includes a signal source module and a power amplifier; a first end of the signal source module is connected to the microwave control module, a second end of the signal source module is connected to a first end of the power amplifier, and a second end of the power amplifier is connected to the detection module; The signal source module obtains a predetermined control signal when N is equal to 1, and generates the Nth microwave signal having a corresponding frequency according to the predetermined control signal; and obtains the control signal when N is greater than 1, and adjusts the frequency of the (N-1)th microwave signal according to the control signal to generate the Nth microwave signal; The microwave generating device according to claim 11, wherein the power amplifier adjusts the microwave signal to a set power.

13. 13. The microwave generating apparatus of claim 12, wherein the signal source module further compares the control signal with a predetermined parameter condition and adjusts a frequency of the (N-1)th microwave signal to generate the Nth microwave signal.

14. the feedback signal includes a forward microwave power and a backward microwave power, and the detection module includes a feedback signal detection module and a feedback signal conversion module; a first end of the feedback signal detection module is connected to the microwave generating module, a second end of the feedback signal detection module is connected to a first end of the feedback signal conversion module, and a second end of the feedback signal conversion module is connected to the microwave control module; the feedback signal detection module detects the forward microwave power and the reverse microwave power; The microwave generating device of claim 11 , wherein the feedback signal converting module generates an adjustment signal based on the feedback signal.

15. the feedback signal detection module includes a first coupler, a second coupler, and a circulator; a first end of the first coupler is connected to the microwave generating module, a second end is connected to the input end of the circulator, and a third end is connected to the feedback signal converting module, the first coupler detects the forward microwave power and transmits the forward microwave power to the feedback signal converting module; a first end of the second coupler is connected to the split end of the circulator, and a second end of the second coupler is connected to the feedback signal conversion module, the circulator splits the backward microwave power, and the second coupler detects the backward microwave power and transmits the backward microwave power to the feedback signal conversion module; or the feedback signal detection module includes a third coupler; 15. The microwave generating device of claim 14, wherein a first end of the third coupler is connected to the microwave generating module, and a second end and a third end of the third coupler are connected to the feedback signal converting module, the third coupler detects the forward microwave power and the backward microwave power, and transmits the forward microwave power to the feedback signal converting module via the second end and the backward microwave power to the feedback signal converting module via the third end.

16. The microwave generating device according to claim 11 , wherein the microwave control module includes a differential amplifier circuit that adjusts the control signal based on a difference between the adjustment signal and a predetermined control signal.

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