CN115052383A

CN115052383A - Method and device for controlling accurate output of frequency source energy and electronic equipment

Info

Publication number: CN115052383A
Application number: CN202210791012.5A
Authority: CN
Inventors: 杨强; 刘荣军; 赵瑞华; 陈君涛; 甄建宇; 赵灿; 朱安康
Original assignee: San Microelectronics Technology Suzhou Co ltd
Current assignee: San Microelectronics Technology Suzhou Co ltd
Priority date: 2022-07-05
Filing date: 2022-07-05
Publication date: 2022-09-13

Abstract

The application is applicable to the technical field of microwaves and provides a method and a device for controlling the energy of a frequency source to be output accurately and electronic equipment. The method for controlling the precise output of the frequency source energy is applied to a microwave generating device with a plurality of frequency source channels, and comprises the following steps: acquiring first power of a transmitting signal and second power of a reflected signal of each frequency source channel under a first working frequency and a first working phase in the process of heating a heated object by a microwave generating device; determining standing wave information of the heated object at a first working frequency and a first working phase according to the first power and the second power of each frequency source channel; determining target transmitting power according to the standing wave information; and sending a second attenuation instruction to an electrically-adjusted attenuator in a frequency source of the microwave generating device based on the target transmitting power. The method can improve the control precision of the signal transmitting power.

Description

Method and device for controlling accurate output of frequency source energy and electronic equipment

Technical Field

The application belongs to the technical field of microwaves, and particularly relates to a method and a device for controlling accurate output of frequency source energy and electronic equipment.

Background

The microwave oven is widely applied to the fields of microwave heating, drying and the like. Most of the traditional microwave ovens in industrial microwave heating and drying application adopt a magnetron as a microwave source, the working frequency of the traditional microwave oven mainly adopts 915MHz +/-15 MHz, and the whole machine power of the microwave oven is within the range of 10W-10 KW.

However, the magnetron needs a high-voltage device when working, the output power of the microwave oven adopting the magnetron depends on the anode voltage under the high-voltage condition, the control precision of the output power is poor, and the working frequency is fixed and unadjustable.

Disclosure of Invention

In view of this, the present application provides a method, an apparatus and an electronic device for controlling the energy accurate output of a frequency source, which can improve the control accuracy of the signal emission power and improve the heating efficiency of the heated object.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, an embodiment of the present application provides a method for controlling precise output of energy from a frequency source, which is applied to a microwave generating apparatus having multiple frequency source channels, where the method for controlling precise output of energy from a frequency source includes: acquiring first power of a transmitting signal and second power of a reflected signal of each frequency source channel under a first working frequency and a first working phase in the process of heating a heated object by a microwave generating device; determining standing wave information of the heated object at the first working frequency and the first working phase according to the first power and the second power of each frequency source channel; determining target transmitting power according to the standing wave information; and sending a second attenuation instruction to an electric adjusting attenuator in a frequency source of the microwave generating device based on the target transmitting power, wherein the second attenuation instruction is used for instructing the electric adjusting attenuator to perform second attenuation processing on the signal.

According to the method for controlling the accurate output of the frequency source energy, the second attenuation instruction is sent to the electrically adjustable attenuator according to the target transmitting power, the electrically adjustable attenuator performs second attenuation processing on the power of the signal according to the second attenuation instruction, and the accuracy of the second attenuation processing is higher (higher than the preset accuracy), so that the accuracy of the frequency source energy output can be improved through controlling the electrically adjustable attenuator, and the actual power output by the frequency source is closer to or equal to the target transmitting power.

With reference to the first aspect, in some embodiments, the determining standing wave information of the heated object at the first operating frequency and the first operating phase according to the first power and the second power of each frequency source channel includes: calculating a difference between the first power and the second power; and carrying out preset conversion on the difference value to obtain a standing wave value corresponding to each frequency source channel.

In combination with the first aspect, in some embodiments, the determining a target transmit power from the standing wave information includes: and taking the transmitting power of the microwave signal corresponding to the minimum value of the standing wave value in the preset time period as the target transmitting frequency.

With reference to the first aspect, in some embodiments, the sending a second attenuation instruction to an electrically-tuned attenuator in a frequency source of the microwave generating apparatus based on the target transmission power includes: generating the second attenuation instruction according to the first transmission power and the target transmission power, so that the electric attenuator attenuates the power of a signal to the target transmission power based on the second attenuation instruction; and sending the second attenuation instruction to the electrically-adjusted attenuator.

With reference to the first aspect, in some embodiments, the microwave generating device includes at least two adjusting circuits, each adjusting circuit corresponds to one of the frequency source channels, and each adjusting circuit includes a coupler and a circulator; the acquiring a first power of a transmission signal and a second power of a reflection signal of each frequency source channel at a first working frequency and a first working phase comprises: acquiring first power of each path of regulating circuit through a coupler of each path of regulating circuit; and acquiring the second power of each path of regulating circuit through the circulator of each path of regulating circuit.

In combination with the first aspect, in some embodiments, the method further comprises: sending a first attenuation instruction to a numerical control attenuator in a frequency source of the microwave generating device; the first attenuation instruction is used for instructing the numerical control attenuator to perform first attenuation processing on a signal, and the precision of the first attenuation processing is lower than that of the second attenuation processing.

With reference to the first aspect, in some embodiments, the sending a first attenuation instruction to a digitally controlled attenuator in a frequency source of the microwave generating device includes: calculating the difference between the target transmitting frequency and the current transmitting frequency; generating the first attenuation instruction according to the difference and a first attenuation range of the numerical control attenuator, so that the numerical control attenuator attenuates the power of a signal to first transmission power based on the first attenuation instruction, wherein the first transmission power is greater than the target transmission power, and the difference between the first transmission power and the target transmission power is smaller than a second attenuation range of the electrically-adjustable attenuator; and sending the first attenuation instruction to the numerical control attenuator.

In a second aspect, the present application provides an apparatus for controlling precise output of frequency source energy, which is applied to a microwave generating apparatus having multiple frequency source channels, and the apparatus for controlling precise output of frequency source energy includes: the microwave heating device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring first power of a transmitting signal and second power of a reflected signal of each frequency source channel under a first working frequency and a first working phase in the process of heating a heated object by the microwave generating device; a standing wave information determination module for determining standing wave information of the heated object at the first operating frequency and the first operating phase from the first power and the second power of each frequency source channel; the power determining module is used for determining target transmitting power according to the standing wave information; and the instruction sending module is used for sending a second attenuation instruction to the electric adjusting attenuator in the frequency source of the microwave generating device based on the target transmitting power, wherein the second attenuation instruction is used for indicating the electric adjusting attenuator to perform second attenuation processing on the signal.

In a third aspect, an embodiment of the present application provides a microwave heating control method, which is applied to a microwave generating apparatus having multiple frequency source channels, and the microwave heating control method includes: acquiring first power of a transmitting signal and second power of a reflected signal of each frequency source channel under a first working frequency and a first working phase in the process of heating a heated object by a microwave generating device; determining standing wave information of the heated object at the first working frequency and the first working phase according to the first power and the second power of each frequency source channel; determining target working parameters according to the standing wave information, wherein the target working parameters comprise target working frequency, target working phase and target transmitting power; heating the heated object based on the target operating parameter.

In a fourth aspect, the present application provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the steps of the method for controlling the precise output of energy from the frequency source according to any one of the first aspect.

In a fifth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, implements the steps of the method for controlling the precise output of energy from a frequency source as described in any one of the above first aspects.

In a sixth aspect, the present application provides a computer program product, which when run on a terminal device, causes an electronic device to execute the steps of the method for controlling the accurate output of energy from a frequency source according to any one of the first aspect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a microwave generating apparatus based on a phase control system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a microwave generating apparatus based on a phase control system according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a first frequency source chip according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of another first frequency source chip provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a microwave generating apparatus based on a phase control system according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a microwave generating apparatus based on a phase control system according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a second frequency source chip according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of another second frequency source chip provided in an embodiment of the present application;

FIG. 9 is a flow chart of a microwave heating control method provided in an embodiment of the present application;

FIG. 10 is a flow chart of a method for controlling the precise output of energy from a frequency source provided by an embodiment of the present application;

FIG. 11 is a schematic structural diagram of an apparatus for controlling precise output of energy from a frequency source according to an embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

To make the objects, technical solutions and advantages of the present application more clear, the following description is made by way of specific embodiments with reference to the accompanying drawings.

Fig. 1 shows a schematic structural diagram of a microwave generating apparatus based on a phase control system according to an embodiment of the present application. Referring to fig. 1, the microwave generating apparatus may include a first frequency source chip 110, a first microprocessor 120, a first adjusting circuit 130, and a second adjusting circuit 140. It should be noted that, two paths of adjusting circuits are taken as an example in fig. 1, but not limited to this, and in other embodiments, more than three paths of adjusting circuits may also be included.

The first frequency source chip 110 may include at least two frequency source channels, and the microwave generating device will be described below by taking the example that the first frequency source chip 110 includes two frequency source channels (a first frequency source channel and a second frequency source channel). The first adjusting circuit 130 is connected to the first frequency source channel, and the second adjusting circuit 140 is connected to the second frequency source channel.

The first adjusting circuit 130 may include a first amplifying block, a first coupler, and a first circulator, which are connected in sequence, and the second adjusting circuit 140 may include a second amplifying block, a second coupler, and a second circulator, which are connected in sequence. The input end of the first amplification module is connected with the first frequency source channel, and the input end of the second amplification module is connected with the second frequency source channel. The output of the first circulator is connected to the output of the first adjusting circuit 130, and the output of the second circulator is connected to the output of the second adjusting circuit 140.

The first microprocessor 120 is connected to each of the at least two frequency source channels, and can control frequency stepping, phase shifting, and attenuation of each frequency source channel, thereby implementing heating control of the heated object.

For example, the first microprocessor 120 may perform forward power detection on the first regulating circuit 130 through the first coupler, perform reverse power detection on the first regulating circuit 130 through the first circulator, perform forward power detection on the second regulating circuit 140 through the second coupler, and perform reverse power detection on the second regulating circuit 140 through the second circulator, respectively. The first microprocessor 120 determines standing wave information of the object to be heated based on the detection result, and controls the first frequency source chip 110 such as frequency stepping, phase shift, attenuation, and the like based on the standing wave information.

The forward power may be the power information of the signal transmitted by the first adjusting circuit 130 or the power information of the signal transmitted by the second adjusting circuit 140. The reverse power may be information of the power of the signal reflected by the first adjusting circuit 130 or information of the power of the signal reflected by the second adjusting circuit 140.

Referring to fig. 2, the first adjusting circuit 130 may include a first power amplifying circuit 131, a second power amplifying circuit 132, a third power amplifying circuit 133, a first coupler 134, and a first circulator 135, which are connected in sequence. The first power amplification circuit 131, the second power amplification circuit 132, and the third power amplification circuit 133 constitute a power amplification module of the first adjustment circuit 130.

The second adjusting circuit 140 may include a fourth power amplifying circuit 141, a fifth power amplifying circuit 142, a sixth power amplifying circuit 143, a second coupler 144, and a second circulator 145, which are connected in sequence. The fourth power amplification circuit 141, the fifth power amplification circuit 142, and the sixth power amplification circuit 143 constitute a power amplification block of the second regulation circuit 140.

A possible circuit structure of the first frequency source chip 110 is explained below.

First, the first circuit structure of the first frequency source chip 110

Referring to fig. 3, the first frequency source chip 110 may include: the first signal generating unit 1111, the first digital control attenuator 1112, the seventh power amplifying circuit 1113, the first power divider 1114, the first digital phase shifter 1115, the first electrical modulation attenuator 1116, the second digital phase shifter 1117 and the second electrical modulation attenuator 1118.

The first signal generating unit 1111, the first digitally controlled attenuator 1112, the seventh power amplifying circuit 1113, the first power divider 1114, the first digital phase shifter 1115 and the first electrically tunable attenuator 1116 form the first frequency source channel, such as channel 1 shown in fig. 3. The first signal generating unit 1111, the first digitally controlled attenuator 1112, the seventh power amplifying circuit 1113, the first power divider 1114, the second digital phase shifter 1117 and the second electrically controlled attenuator 1118 form the second frequency source channel, such as channel 2 shown in fig. 3.

The first output end of the first power divider 1114 is connected to the input end of the first digital phase shifter 1115, and the output end of the first digital phase shifter 1115 is connected to the input end of the first electrically tunable attenuator 1116. The output terminal of the first electrically tunable attenuator 1116 is connected to the first output terminal of the first frequency source chip 110.

A second output end of the first power divider 1114 is connected to an input end of the second digital phase shifter 1117, and an output end of the second digital phase shifter 1117 is connected to an input end of the second electrically-controlled attenuator 1118. The output end of the second electrically tunable attenuator 1118 is connected to the second output end of the first frequency source chip 110.

Referring to fig. 3, the first frequency source chip 110 may further include a first SPI (Serial Peripheral Interface) Interface and a first voltage-controlled attenuation (VT) Interface. First SPI interface is connected with first signal generation unit 1111, and first VT interface is connected with first electrically tunable attenuator 1116 and second electrically tunable attenuator 1118.

In this embodiment, the first SPI interface and the first VT interface are both used for connecting with the first microprocessor 120. Among them, the first microprocessor 120 may transmit a MISO (master receive slave) signal, a MOSI (master transmit slave receive) signal, an SCLK (internal system clock) signal, and an SSN (enable) signal to the first signal generation unit 1111 through the first SPI interface. First microprocessor 120 may control first electrically tunable attenuator 1116 and/or second electrically tunable attenuator 1118 via the first VT interface.

In addition, the first frequency source chip 110 may further include a first crystal oscillator interface and a first power interface. The first frequency source chip 110 may be connected to an external crystal oscillator through a first crystal oscillator interface, where the external crystal oscillator may be a 16MHz chip oscillator for industrial use. The first frequency source chip 110 may be connected to an external power source through a first power interface, and an LDO (low dropout regulator) may be built in the first frequency source chip 110. The LDO can convert an external power into 3.3V or 5V to supply power to various parts in the first frequency source chip 110.

An input end of the first signal generating unit 1111 is connected to an external crystal oscillator through a first crystal oscillator interface, and an output end of the first signal generating unit 1111 is connected to an input end of the first digitally controlled attenuator 1112. The output terminal of the first digitally controlled attenuator 1112 is connected to the input terminal of the first power divider 1114 through a seventh power amplifier circuit 1113.

In some embodiments, the first frequency source chip 110 may further include a first channel switch, an eighth power amplifier, a second channel switch, and a ninth power amplifier.

The first signal generating unit 1111, the first digital control attenuator 1112, the seventh power amplifying circuit 1113, the first power divider 1114, the first digital phase shifter 1115, the first electrically tunable attenuator 1116, the first channel switch, and the eighth power amplifier constitute the first frequency source channel. The output end of the first electrically tunable attenuator 1116 is connected to the input end of the eighth power amplifier circuit through the first channel switch, and the output end of the eighth power amplifier circuit is connected to the first output end of the first frequency source chip 110.

The first signal generating unit 1111, the first digitally controlled attenuator 1112, the seventh power amplifying circuit 1113, the first power divider 1114, the second digital phase shifter 1117, the second electrically controlled attenuator 1118, the second channel switch, and the ninth power amplifier form the second frequency source channel. The output end of the second electrically tunable attenuator 1118 is connected to the input end of the ninth power amplifier circuit through the second channel switch, and the output end of the ninth power amplifier circuit is connected to the second output end of the first frequency source chip 110.

Optionally, the first frequency source chip 110 may further be provided with a first channel switch (LVTTL) interface, and the first LVTTL interface is connected to the first channel switch and the second channel switch. The first LVTTL interface is used to connect with the first microprocessor 120. The first microprocessor 120 may send a control instruction to the first channel switch and the second channel switch through the first LVTTL interface, and control the first channel switch and/or the second channel switch to be turned on and turned off.

The first frequency source chip 110 receives a channel switch instruction sent by the first microprocessor 120 through the first LVTTL interface, and the first channel switch and the second channel switch respectively execute the channel switch instruction to control on/off of the respective frequency source channel.

Referring to fig. 2, the first programmable frequency source of the first frequency source chip 110 may include the first signal generation unit 1111, the first digitally controlled attenuator 1112, the seventh power amplification circuit 1113, the first power divider 1114, the first digital phase shifter 1115, the first channel switch, and the eighth power amplifier in fig. 3. The first ALC control unit may include first electrically tunable attenuator 1116 in fig. 3. The second programmable frequency source may include the first signal generating unit 1111, the first digitally controlled attenuator 1112, the seventh power amplifying circuit 1113, the first power divider 1114, the second digital phase shifter 1117, the second channel switch, and the ninth power amplifier in fig. 3. The second ALC control unit may include the second electrically tunable attenuator 1118 of fig. 3.

Second, second circuit structure of first frequency source chip 110

Referring to fig. 4, the first frequency source chip 110 may include a second signal generation unit 1131, a second digital attenuator 1132, a tenth power amplifier 1133, a third digital phase shifter 1134, and a third electrically tunable attenuator 1135, which are connected in sequence. The first frequency source chip 110 further includes a third signal generating unit 1141, a third digitally controlled attenuator 1142, a twelfth power amplifier 1143, a fourth digital phase shifter 1144 and a fourth electrically tunable attenuator 1145, which are connected in sequence.

Referring to fig. 4, the first frequency source chip 110 may further include a second SPI interface and a second VT interface. The second SPI interface is connected with the second signal generation unit 1131 and the third signal generation unit 1141, and the second VT interface is connected with the third electrically tunable attenuator 1135 and the fourth electrically tunable attenuator 1145.

In this embodiment, the second SPI interface and the second VT interface are both used for connecting with the first microprocessor 120. The first microprocessor 120 may transmit the MISO signal, the MOSI signal, the SCLK signal, and the SSN signal to the second signal generation unit 1131 and the third signal generation unit 1141 through the second SPI interface. The first microprocessor 120 may control the third electrically tunable attenuator 1135 and/or the fourth electrically tunable attenuator 1145 through the second VT interface.

In addition, the first frequency source chip 110 may further include a second crystal interface and a second power interface. The first frequency source chip 110 may be connected to an external crystal oscillator through a second crystal oscillator interface, where the external crystal oscillator may be a 16MHz chip oscillator for industrial use. First frequency source chip 110 may be connected to an external power source through a second power interface, and first frequency source chip 110 may have an LDO built in. The LDO can convert an external power into 3.3V or 5V to supply power to various parts in the first frequency source chip 110.

The second signal generating unit 1131 and the third signal generating unit 1141 may be connected to an external crystal oscillator through a second crystal oscillator interface. For example, the second signal generating unit 1131 and the third signal generating unit 1141 may be connected to the same crystal oscillator, or may be connected to different crystal oscillators, which is not limited in this respect.

In some embodiments, the first frequency source chip 110 may further include a third channel switch, an eleventh power amplifier, a fourth channel switch, and a thirteenth power amplifier.

The first frequency source channel includes a second signal generating unit 1131, a second digital controlled attenuator 1132, a tenth power amplifier 1133, a third digital phase shifter 1134, a third electrically tunable attenuator 1135, a third channel switch, and an eleventh power amplifier, which are connected in sequence. The output end of the third electrically tunable attenuator 1135 is connected to the input end of the eleventh power amplifier through the third channel switch, and the output end of the eleventh power amplifier is connected to the first output end of the first frequency source chip 110.

The second frequency source channel includes a third signal generating unit 1141, a fourth digital controlled attenuator 1142, a twelfth power amplifier 1143, a fourth digital phase shifter 1144, a fourth electrically-tunable attenuator 1145, a fourth channel switch and a thirteenth power amplifier, which are connected in sequence. The output end of the fourth electrically tunable attenuator 1145 is connected to the input end of the thirteenth power amplifier through the fourth channel switch, and the output end of the thirteenth power amplifier is connected to the second output end of the frequency source chip 110.

Optionally, the first frequency source chip 110 may further be provided with a second channel switch (LVTTL) interface, where the second LVTTL interface is connected to the third channel switch and the fourth channel switch. The second LVTTL interface is used to connect with the first microprocessor 120. The first microprocessor 120 may send a control instruction to the third channel switch and the fourth channel switch through the second LVTTL interface, and control the third channel switch and/or the fourth channel switch to be turned on and turned off.

The first frequency source chip 110 receives the channel switch instruction sent by the first microprocessor 120 through the second LVTTL interface, and the third channel switch and the fourth channel switch respectively execute the channel switch instruction to control on/off of the respective frequency source channel.

Referring to fig. 2, the first programmable frequency source of the first frequency source chip 110 may include a second signal generation unit 1131, a second digital controlled attenuator 1132, a tenth power amplifier 1133, a third digital phase shifter 1134, a third channel switch, and an eleventh power amplifier. The first ALC control unit may include a third electrically tunable attenuator 1135. The second programmable frequency source may include a third signal generation unit 1141, a third digitally controlled attenuator 1142, a twelfth power amplifier 1143, a fourth digital phase shifter 1144, a fourth channel switch, and a thirteenth power amplifier. The second ALC control unit may include a fourth electrically tunable attenuator 1145.

In some embodiments, the first frequency source chip 110 may have three or more frequency source channels.

In some embodiments, the positional relationship of the digital phase shifter, the electrically tunable attenuator, and the channel switch may vary for each frequency source channel.

The first frequency source channel is taken as an example for explanation. For example, the tenth power amplifier 1133 is connected to the third electrically tunable attenuator 1135, the third digital phase shifter 1134, and the third channel switch in sequence. For another example, the tenth power amplifier 1133 is sequentially connected to the third channel switch, the third electrically tunable attenuator 1135, and the third digital phase shifter 1134. The eleventh power amplifier is located behind the third electrically-tuned attenuator 1135, and may amplify the attenuated signal.

The first microprocessor 120 has a plurality of inputs and outputs. The first microprocessor 120 has a first input connected to the first coupler 134, a second input connected to the first circulator 135, a third input connected to the second coupler 144, and a fourth input connected to the second circulator 145. A first output terminal of the first microprocessor 120 is connected to the SPI interface of the first frequency source chip 110, a second output terminal is connected to the LVTTL interface of the first frequency source chip 110, and a third output terminal is connected to the VT interface of the first frequency source chip 110.

According to the multi-channel microwave generating device with the phase control system, the control signal for controlling the frequency source is generated through the first power of the transmitting signal and the second power of the reflecting signal, and the heated object is heated, so that the parameter of the microwave signal can be adjusted, and the heating efficiency of the heated object can be improved.

And the target working parameters of the microwave generating device for heating the heated object are determined through the standing wave information, and the microwave generating device heats the heated object according to the target working parameters, so that the adjustment of the working frequency, the working phase and the emission power is realized, the heating efficiency of the heated object can be improved, and the control precision of the signal emission power is improved.

The operation of the multi-channel microwave generator of the phase control system is described below with reference to fig. 1 to 4 as an example:

first, the first microprocessor 120 sends an initial mode control command to the signal generating unit, the numerical control attenuator, the electrical tuning attenuator and the digital phase shifter in the first frequency source chip 110 through the SPI interface of the first frequency source chip 110, and the microwave generating device is turned on to operate. The initial mode control command is used to indicate the initial operating parameters of the microwave generating device, for example, the initial operating parameters may be an initial output power of 100W, an initial operating frequency of 2450MHz, and an initial phase of 0.

Then, the first microprocessor 120 acquires first power information of the transmission signal of the first adjusting circuit 130 through the first coupler 134, second power information of the reflection signal of the first adjusting circuit 130 through the first circulator 135, third power information of the transmission signal of the second adjusting circuit 140 through the second coupler 144, and fourth power information of the reflection signal of the second adjusting circuit 140 through the second circulator 145. The first microprocessor 120 determines the standing wave value of the heated object at the current operating frequency and the current phase according to the first to fourth power information.

The transmission signal is a signal projected by the first adjusting circuit 130 to the heated object, and the reflection signal is a signal reflected by the first adjusting circuit 130 after being projected to the heated object. Each path of regulating circuit corresponds to a standing wave value, and the standing wave values corresponding to different regulating circuits can be the same or different.

For example, for the first adjusting circuit 130, the first microprocessor 120 may determine the standing wave value corresponding to the first adjusting circuit 130 according to the first power information and the second power information. The first microprocessor 120 may determine the standing wave value corresponding to the first adjusting circuit 130 based on the difference between the first power information and the second power information. For example, the first microprocessor 120 calculates a difference between the first power information and the second power information, and performs a predetermined conversion on the difference to obtain a standing wave value corresponding to the first adjusting circuit 130.

For example, for the second adjusting circuit 140, the first microprocessor 120 may determine the standing wave value corresponding to the second adjusting circuit 140 according to the third power information and the fourth power information. The first microprocessor 120 may determine the standing wave value corresponding to the second adjusting circuit 140 based on a difference between the third power information and the fourth power information. For example, the first microprocessor 120 calculates a difference between the third power information and the fourth power information, and performs a predetermined conversion on the difference to obtain a standing wave value corresponding to the second adjusting circuit 140.

Then, based on the above method for determining the standing wave information of each adjusting circuit, the first microprocessor 120 performs an uninterrupted fast frequency sweep on the signal generating unit, performs an uninterrupted fast phase sweep on the digital phase shifter, and can determine the real-time variation of the standing wave value along with the frequency and phase of the microwave.

Then, the first microprocessor 120 determines the optimal operation mode of the microwave generating device according to the real-time variation of the standing wave value along with the frequency and phase of the microwave.

The optimal working mode of the microwave generating device comprises an optimal working frequency, an optimal working phase and an optimal transmitting power. The first microprocessor 120 may use the operating frequency, the operating phase, and the transmitting power corresponding to the minimum value of the standing wave value in a certain time period as the optimal operating frequency, the optimal operating phase, and the optimal transmitting power, respectively. Thereby, an optimal operation mode of the microwave generating device in the time period can be obtained.

Then, the channel switch is turned off, and the first microprocessor 120 is waited to send a new work instruction.

For example, for each working cycle of the microwave generating device, the first microprocessor 120 first determines the minimum value of the standing wave value in the current working cycle, and the corresponding working frequency, working phase and transmitting power are respectively used as the optimal working frequency, optimal working phase and optimal transmitting power. And taking the optimal working frequency, the optimal working phase and the optimal transmitting power as working parameters of the next working period.

Then, the first microprocessor 120 receives the working instruction according to the working instruction in the optimal working mode, and the signal generating unit, the numerical control attenuator, the electrically tunable attenuator and the digital phase shifter adjust the working parameters.

For example, the work instructions may include a frequency code instruction, an attenuation value instruction, and a voltage value instruction. The signal generating unit implements the precise adjustment of the frequency according to the frequency code command sent by the first microprocessor 120. The numerical control attenuator realizes the large-range adjustment of the output power according to the attenuation value instruction sent by the first microprocessor 120, and the electrically adjustable attenuator carries out the precise adjustment of the output power according to the voltage value instruction sent by the first microprocessor 120.

Finally, the first microprocessor 120 sends a channel switch closing instruction to the channel switch, the channel switch is closed in response to the channel switch closing instruction, and the microwave generating device starts to operate according to the optimal operating mode, thereby completing one operating cycle.

The channel switch closing instruction can be realized in a pulse instruction mode, and the channel switch is adjusted.

Fig. 5 is a schematic structural diagram illustrating a microwave generating apparatus based on a phase control system according to an embodiment of the present application. Referring to fig. 5, the microwave generating apparatus may include a second frequency source chip 210, a third regulating circuit 220, and a fourth regulating circuit 230. The second frequency source chip 210 includes a power source 211 and a second microprocessor 212, and the power source 211 and the second microprocessor 212 are integrally provided in one chip. It should be noted that fig. 5 illustrates a two-way adjusting circuit, but the invention is not limited thereto, and in other embodiments, the adjusting circuit may further include more than three ways.

The power source 211 may include at least two frequency source channels, and the microwave generating device is described below by taking the example that the frequency source 211 includes two frequency source channels (a third frequency source channel and a fourth frequency source channel). The third adjusting circuit 130 is connected to the third frequency source channel, and the fourth adjusting circuit 140 is connected to the fourth frequency source channel. For the structures of the third adjusting circuit 220 and the fourth adjusting circuit 230, please refer to the first adjusting circuit 130 and the second adjusting circuit 140, which are not described herein again.

The second microprocessor 212 is connected to each of the at least two frequency source channels, and can control the step, phase shift, and attenuation of the frequency of each frequency source channel, thereby controlling the heating of the object to be heated.

For example, the second microprocessor 212 may perform forward power detection on the third regulating circuit 220 through the third coupler, backward power detection on the third regulating circuit 220 through the third circulator, forward power detection on the fourth regulating circuit 230 through the fourth coupler, and backward power detection on the fourth regulating circuit 230 through the fourth circulator, respectively. The second microprocessor 212 determines standing wave information of the object to be heated based on the detection result, and controls the frequency source 211 such as frequency stepping, phase shifting, attenuation, and the like based on the standing wave information.

The forward power may be the power information of the signal transmitted by the third adjusting circuit 220 or the power information of the signal transmitted by the fourth adjusting circuit 230. The reverse power may be information on the power of the signal reflected by the second adjusting circuit 220 or information on the power of the signal reflected by the third adjusting circuit 230.

Referring to fig. 6, the third adjusting circuit 220 may include a fourteenth power amplifying circuit 221, a fifteenth power amplifying circuit 222, a sixteenth power amplifying circuit 223, a third coupler 224, and a third circulator 225, which are connected in sequence. The fourteenth power amplifier circuit 221, the fifteenth power amplifier circuit 222, and the sixteenth power amplifier circuit 223 constitute a power amplifier module of the third regulator circuit 220.

The fourth adjusting circuit 230 may include a seventeenth power amplifying circuit 231, an eighteenth power amplifying circuit 232, a nineteenth power amplifying circuit 233, a fourth coupler 234, and a fourth circulator 235, which are connected in sequence. Among them, the seventeenth power amplifying circuit 231, the eighteenth power amplifying circuit 232, and the nineteenth power amplifying circuit 233 constitute a power amplifying module of the fourth adjusting circuit 230.

A possible circuit structure of the second frequency source chip 210 is explained below.

First circuit structure of first and second frequency source chips 210

Referring to fig. 7, the power source 211 may include: a fourth signal generating unit 2111, a fourth digitally controlled attenuator 2112, a twentieth power amplifying circuit 2113, a second power divider 2114, a fifth digital phase shifter 2115, a fifth electrically-tuned attenuator 2116, a sixth digital phase shifter 2117 and a sixth electrically-tuned attenuator 2118.

The fourth signal generating unit 2111, the fourth digitally controlled attenuator 2112, the twentieth power amplifying circuit 2113, the second power divider 2114, the fifth digital phase shifter 2115 and the fifth electrically controlled attenuator 2116 form the third frequency source channel. The fourth signal generating unit 2111, the fourth digitally controlled attenuator 2112, the twentieth power amplifying circuit 2113, the second power divider 2114, the sixth digital phase shifter 2117 and the sixth electrically controlled attenuator 2118 form the fourth frequency source channel.

A first output end of the second power divider 2114 is connected to an input end of a fifth digital phase shifter 2115, and an output end of the fifth digital phase shifter 2115 is connected to an input end of a fifth electrically tunable attenuator 2116. The output end of the fifth electrically tunable attenuator 2116 is connected to the first output end of the second frequency source chip 210.

A second output end of the second power divider 2114 is connected to an input end of a sixth digital phase shifter 2119, and an output end of the sixth digital phase shifter 2119 is connected to an input end of a sixth electrically tunable attenuator 2120. The output end of the sixth electrically tunable attenuator 2120 is connected to the second output end of the second frequency source chip 210.

Referring to fig. 7, the second frequency source chip 210 may further include a third oscillator interface and a third power interface. The second frequency source chip 210 may be connected to an external crystal oscillator through a third crystal oscillator interface, where the external crystal oscillator may be a 16MHz industrial patch crystal oscillator. The second frequency source chip 210 may be connected to an external power source through a third power interface, and the second frequency source chip 210 may have an LDO built therein. The LDO can convert an external power source into 3.3V or 5V to supply power to various parts in the second frequency source chip 210.

An input end of the fourth signal generation unit 2111 is connected to an external crystal oscillator through a third crystal oscillator interface, and an output end of the fourth signal generation unit 2111 is connected to an input end of the fourth digitally controlled attenuator 2112. An output end of the fourth digitally controlled attenuator 2112 is connected to an input end of the second power divider 2114 through a twentieth power amplification circuit 2113.

The frequency source chip in this embodiment has a third frequency source channel and a fourth frequency source channel, and can output two paths of signals through the third frequency source channel and the fourth frequency source channel.

Specifically, the fourth signal generating unit 2111, the fourth digitally controlled attenuator 2112, the twentieth power amplifier 2113, the second power divider 2114, the fifth digital phase shifter 2115 and the fifth electrically controlled attenuator 2116 form a third frequency source channel (channel 1 shown in fig. 7).

The fourth signal generation unit 2111, the fourth digitally controlled attenuator 2112, the twentieth power amplifier 2113, the second power divider 2114, the sixth digital phase shifter 2117 and the sixth electrically controlled attenuator 2118 form a fourth frequency source channel (channel 2 shown in fig. 7).

A second output end of the second power divider 1114 is connected to an input end of the sixth digital phase shifter 2117, and an output end of the sixth digital phase shifter 2117 is connected to an input end of the sixth electrically tunable attenuator 2118. An output end of the sixth electrically tunable attenuator 2118 is connected to a second output end of the second frequency source chip 110.

As shown in fig. 7, the second microprocessor 212 is connected to a fourth signal generating unit 2111, a fourth digitally controlled attenuator 2112, a fifth digital phase shifter 2115, a fifth electrically controlled attenuator 2116, a sixth digital phase shifter 2117 and an eighth electrically controlled attenuator 2118. The microprocessor 112 is used for controlling the signal generating unit 1111, the digitally controlled attenuator 1112 and the digital phase shifter, the electrically adjusted attenuator and the channel switch of each processing circuit to control the frequency, the phase and the power of the output signal of the second frequency source chip 110.

The second microprocessor 212 is configured to send a frequency modulation instruction to the fourth signal generating unit 2111, send a first attenuation instruction to the fourth digitally controlled attenuator 2112, send a phase shift instruction to the fifth digital phase shifter 2115 and the sixth digital phase shifter 2117, and send a second attenuation instruction to the fifth electrically tunable attenuator 2116 and the sixth electrically tunable attenuator 2118, respectively.

The fourth signal generating unit 2111 executes the frequency modulation instruction to adjust the frequency of the first power signal. The fourth digitally controlled attenuator 2112 performs attenuation processing on the first power signal in accordance with the first attenuation instruction. The fifth digital phase shifter 2115 performs a phase shift process on the power signal transmitted by the second power divider 2114 according to the phase shift instruction, and the sixth digital phase shifter 2117 performs a phase shift process on the power signal transmitted by the second power divider 2114 according to the phase shift instruction. The fifth electrically tunable attenuator 2116 attenuates the power signal transmitted by the second power divider 2114 according to the second attenuation instruction, and the second electrically tunable attenuator 1118 attenuates the power signal transmitted by the second power divider 2114 according to the second attenuation instruction.

Referring to fig. 7, the second frequency source chip 210 may further be provided with a crystal oscillator interface and a power interface. The fourth signal generating unit 2111 may be connected to an external crystal oscillator through a crystal oscillator interface, where the external crystal oscillator may be a 16MHz chip oscillator for industrial use. The frequency source chip 110 may be connected to an external power source through a power interface, and the second frequency source chip 210 may have an LDO (low dropout regulator) built therein. The LDO can convert an external power source into 3.3V or 5V to supply power to various parts in the second frequency source chip 210.

The input end of the fourth signal generating unit 2111 is connected to an external crystal oscillator through a crystal oscillator interface, and the output end of the signal generating unit 1111 is connected to the input end of the digital control attenuator 1112. The output terminal of the fourth digitally controlled attenuator 2112 is connected to the input terminal of the second power divider 2114 via a twentieth power amplifier 2113.

In some embodiments, the second frequency source chip 210 may also be provided with a communication interface (not shown). The second microprocessor 212 can be communicatively connected to an external terminal via the communication interface. The user can control the working state of the second frequency source chip 210 through the external terminal, and know the real-time parameters of the second frequency source chip 210, etc.

For example, the operating frequency of the second frequency source chip 210 may be 915MHz ± 15MHz, 2450MHz ± 50MHz, 433MHz, or other frequencies, which is not limited in this respect. The power of the microwave oven to which the second frequency source chip 210 of the embodiment of the present application is applied may be 10W to 1 KW.

In some embodiments, the frequency source chip 110 may further include a fifth channel switch, a twenty-first power amplifier, a sixth channel switch, and a twenty-second power amplifier.

The fourth signal generating unit 2111, the fourth digitally controlled attenuator 2112, the twentieth power amplifying circuit 2113, the second power divider 2114, the fifth digital phase shifter 2115, the fifth electrically tunable attenuator 2116, the fifth channel switch, the twenty-first power amplifier, the sixth digital phase shifter 2117, the sixth electrically tunable attenuator 2118, the sixth channel switch, and the twenty-second power amplifier constitute the frequency source 211 of the second frequency source chip 210.

A fourth signal generating unit 2111, a fourth digitally controlled attenuator 2112, a twentieth power amplifying circuit 2113, a second power divider 2114, a fifth digital phase shifter 2115, a fifth electrically-controlled attenuator 2116, a fifth channel switch and a twenty-first power amplifier form a third frequency source channel. An output end of the fifth electrically-tunable attenuator 2116 is connected to an input end of the twenty-first power amplifier through the fifth channel switch, and an output end of the twenty-first power amplifier is connected to the first output end of the second frequency source chip 210.

A fourth frequency source channel is formed by the fourth signal generating unit 2111, the fourth digitally controlled attenuator 2112, the twentieth power amplifying circuit 2113, the second power divider 2114, the sixth digital phase shifter 2117, the sixth electrically controlled attenuator 2118, the sixth channel switch and the twenty-second power amplifier. An output end of the sixth electrically-tunable attenuator 2118 is connected to an input end of a twenty-second power amplifier through a sixth channel switch, and an output end of the twenty-second power amplifier is connected to a second output end of the second frequency source chip 210.

In addition, the second microprocessor 212 is also connected to a fifth channel switch and a sixth channel switch, respectively. The second microprocessor 212 is configured to send channel switch commands to the fifth channel switch and the sixth channel switch, respectively. And the fifth channel switch and the sixth channel switch respectively execute channel switch instructions to control the on-off of respective frequency source channels.

It should be noted that the circuit structure shown in fig. 7 is only one example of the second frequency source chip 210, and the embodiment of the present application is not limited thereto.

In some embodiments, the second frequency source chip 210 may have three or more frequency source channels.

In some embodiments, the positional relationship of the fifth digital phase shifter 2115, the fifth electrically tunable attenuator 2116 and the fifth channel may vary. For example, the second power divider 2114 is connected to the fifth electrically tunable attenuator 2116, the fifth digital phase shifter 2115 and the fifth channel switch in sequence. For another example, the second power divider 2114 is sequentially connected to the fifth channel switch, the fifth electrically tunable attenuator 2116, and the fifth digital phase shifter 2115. The twenty-first power amplifier is located behind the fifth electrically-tuned attenuator 2116, and can amplify the attenuated signal.

Second circuit structure of second and third frequency source chips 210

Referring to fig. 8, the second frequency source chip 210 may include a second microprocessor 212 and a frequency source (not shown). The frequency source includes a third frequency source channel (channel 1 shown in fig. 8) and a fourth frequency source channel (channel 2 shown in fig. 8). Through the third frequency source channel and the fourth frequency source channel, the second frequency source chip 210 can output two signals.

Specifically, the second frequency source chip 210 may include a fifth signal generation unit 2131, a fifth digitally controlled attenuator 2132, a twenty-third power amplification circuit 2133, a seventh digital phase shifter 2134, and a seventh electrically controlled attenuator 2135, which are connected in sequence. The second frequency source chip 210 further includes a sixth signal generating unit 2141, a sixth digitally controlled attenuator 2142, a twenty-fifth power amplifying circuit 2143, an eighth digital phase shifter 2144, and an eighth electrically tunable attenuator 2145, which are connected in sequence.

The third frequency source channel includes a fifth signal generation unit 2131, a fifth digitally controlled attenuator 2132, a twenty-third power amplifier 2133, a seventh digital phase shifter 2134 and a seventh electrically controlled attenuator 2135, which are connected in sequence.

The fourth frequency source channel includes a sixth signal generating unit 2141, a sixth digitally controlled attenuator 2142, a twenty-fifth power amplifier 2143, an eighth digital phase shifter 2144, and an eighth electrically tunable attenuator 2145, which are connected in sequence.

Specifically, an output end of the fifth signal generation unit 2131 is connected to an input end of a fifth digitally controlled attenuator 2132, an output end of the fifth digitally controlled attenuator 2132 is connected to an input end of a seventh digital phase shifter 2134 through a thirteenth power amplifier 2133, an output end of the seventh digital phase shifter 2134 is connected to an input end of a seventh electrically tunable attenuator 2135, and an output end of the seventh electrically tunable attenuator 2135 is connected to a first output end of the second frequency source chip 210.

An output end of the sixth signal generating unit 2141 is connected to an input end of the sixth digitally controlled attenuator 2142, an output end of the sixth digitally controlled attenuator 2142 is connected to an input end of the eighth digital phase shifter 2144 through a twenty-fifth power amplifier 2143, an output end of the eighth digital phase shifter 2144 is connected to an input end of the eighth electrically tunable attenuator 2145, and an output end of the eighth electrically tunable attenuator 2145 is connected to a second output end of the second frequency source chip 210.

The second microprocessor 212 is connected with the signal generating unit, the numerical control attenuator, the digital phase shifter and the electrically-tuned attenuator of each frequency source channel. The second microprocessor 112 is used for controlling the signal generating unit, the numerical control attenuator, the digital phase shifter and the electrically-tuned attenuator so as to control the frequency, the phase and the power of the output signal of the second frequency source chip 210.

As shown in fig. 8, the second microprocessor 212 is connected to the fifth signal generating unit 2131, the fifth digitally controlled attenuator 2132, the seventh digital phase shifter 2134, the seventh electrically controlled attenuator 2135, the sixth signal generating unit 2141, the sixth digitally controlled attenuator 2142, the eighth digital phase shifter 2144 and the eighth electrically controlled attenuator 2145.

The second microprocessor 212 is configured to send a frequency modulation instruction to the fifth signal generation unit 2131 and the sixth signal generation unit 2141, send a third attenuation instruction to the fifth numerical control attenuator 2132 and the sixth numerical control attenuator 2142, send a phase shift instruction to the seventh digital phase shifter 2134 and the eighth digital phase shifter 2144, and send a fourth attenuation instruction to the seventh electrical attenuator 2135 and the eighth electrical attenuator 2145, respectively.

The fifth signal generating unit 2131 and the sixth signal generating unit 2141 execute a frequency modulation command to adjust the frequency of the respective first power signal. The fifth digitally controlled attenuator 2132 and the sixth digitally controlled attenuator 2142 perform attenuation processing on the respective first power signals according to the third attenuation instruction, respectively. The seventh digital phase shifter 2134 performs phase shifting processing on the received power signal according to the phase shifting instruction, and the eighth digital phase shifter 2144 performs phase shifting processing on the received power signal according to the phase shifting instruction. The seventh electrically adjustable attenuator 2135 attenuates the received power signal according to the fourth attenuation instruction, and the eighth electrically adjustable attenuator 2145 attenuates the received power signal according to the fourth attenuation instruction.

Referring to fig. 8, the second frequency source chip 210 may further include a fourth crystal oscillator interface and a fourth power interface. The second frequency source chip 210 may be connected to an external crystal oscillator through a fourth crystal oscillator interface, where the external crystal oscillator may be a 16MHz industrial patch crystal oscillator. The second frequency source chip 210 may be connected to an external power source through a fourth power interface, and the second frequency source chip 210 may have an LDO built in. The LDO can convert an external power source into 3.3V or 5V to supply power to various parts in the second frequency source chip 210.

The fifth signal generating unit 2131 and the sixth signal generating unit 2141 may both be connected to an external crystal oscillator through a fourth crystal oscillator interface. For example, the fifth signal generating unit 2131 and the sixth signal generating unit 2141 may be connected to the same crystal oscillator, or may be connected to different crystal oscillators, which is not limited thereto.

The second microprocessor 212 has a plurality of inputs and outputs. The second microprocessor 212 has a first input connected to the third coupler 224, a second input connected to the third circulator 225, a third input connected to the fourth coupler 234, and a fourth input connected to the fourth circulator 245. The output of the second microprocessor 212 is connected to a frequency source 211. Specifically, the output end of the second microprocessor 212 is connected to the signal generating unit, the digital control attenuator, the digital phase shifter, and the electrically tunable attenuator in the second frequency source chip 210, respectively.

In some embodiments, the second frequency source chip 210 may further include a seventh channel switch, a twenty-fourth power amplifier, an eighth channel switch, and a twenty-fifth power amplifier.

The third frequency source channel includes a fifth signal generating unit 2131, a fifth digital controlled attenuator 2132, a twenty-third power amplifying circuit 2133, a seventh digital phase shifter 2134, a seventh electrical attenuator 2135, a seventh channel switch and a twenty-fourth power amplifier, which are connected in sequence. An output end of the seventh electrically tunable attenuator 2135 is connected to an input end of a twenty-fourth power amplifier through a seventh channel switch, and an output end of the twenty-fourth power amplifier is connected to the first output end of the second frequency source chip 210.

The fourth frequency source channel includes a sixth signal generating unit 2141, a sixth digitally controlled attenuator 2142, a twenty-fifth power amplifying circuit 2143, an eighth digital phase shifter 2144, an eighth electrically tunable attenuator 2145, an eighth channel switch, and a twenty-sixth power amplifier, which are connected in sequence. The output end of the eighth electrically tunable attenuator 2145 is connected to the input end of the twenty-sixth power amplifier through the eighth channel switch, and the output end of the twenty-sixth power amplifier is connected to the second output end of the second frequency source chip 110.

In addition, the second microprocessor 212 is also connected to a seventh channel switch and an eighth channel switch, respectively. The second microprocessor 212 is used for sending channel switch commands to the seventh channel switch and the eighth channel switch respectively. And the seventh channel switch and the eighth channel switch respectively execute channel switch instructions to control the on-off of respective frequency source channels.

For the working process of the microwave generating device shown in fig. 5 to 8, please refer to the working process of the microwave generating device shown in fig. 1 to 4, which is not described herein again.

Illustratively, the parameters of each of the above numerical control attenuators are as follows: the attenuation range is 0-30 dB, the stepping is 1dB, and the attenuation precision is +/-0.5 dB. The parameters of each electrically-adjusted attenuator are as follows: the attenuation range is 0-30 dB, the continuous adjustable effect is achieved, and the working voltage is 0-3.3V. The parameters of the digital phase shifters are as follows: 0-360 degrees, 1.4 degrees of stepping and less than or equal to 2 degrees of phase shifting precision. The parameters of the above-mentioned channel switches are as follows: the degree of turn-off is 60dB, and the response time is within 150 ms.

Based on the microwave generating device, the embodiment of the application also provides a microwave heating control method. Referring to fig. 9, the microwave heating control method includes steps 301 to 304.

Step 301, in the process of heating the heated object by the microwave generating device, acquiring a first power of the transmitting signal and a second power of the reflected signal of each frequency source channel at the first working frequency and the first working phase.

The microwave generating device can have two or more frequency source channels, and each frequency source channel can generate a transmitting signal with a set frequency, a set phase and a set power. The signals generated by the frequency source channels are transmitted to the heated object through corresponding regulating circuits, the heated object can transmit the signals, and the regulating circuits can acquire the signals transmitted back by the heated object. Therefore, the transmission signal is a signal projected onto the heating object by the adjusting circuit, and the reflection signal is a signal reflected back after the adjusting circuit is projected onto the heating object.

For example, a first power of the transmission signal of each adjusting circuit may be obtained through the coupler of each adjusting circuit, and a second power of the reflection signal of each adjusting circuit may be obtained through the circulator of each adjusting circuit.

It should be noted that the first power of each frequency source channel may be the same or different, and the second power of each frequency source channel may be the same or different.

For example, the first operating frequency may be an operating frequency at a first time, the first operating phase may be an operating phase at the first time, and the first time may be any time. For example, the first time may be an initial time at which the microwave generating device starts to operate. At this time, the first operating frequency and the first operating phase may be an initial operating frequency and an initial phase corresponding to an initial operating parameter set by a user. For example, the initial operating frequency may be 2450MHz and the initial phase may be 0. For another example, the first time may be any time during the operation of the microwave generating device.

Step 302, according to the first power and the second power of each frequency source channel, determining standing wave information of the heated object under the first working frequency and the first working phase.

When a microwave signal is transmitted from one medium (e.g., an antenna of a microwave generating device) to another medium (e.g., an object to be heated), energy of the microwave signal is partially reflected due to the difference between the two media, and the reflected microwave is a standing wave.

In some embodiments, step 302 may include: and for each frequency source channel, determining standing wave information corresponding to the frequency source channel according to the first power and the second power. Wherein the standing wave value corresponding to each frequency source channel can be determined based on a difference between the first power and the second power. For example, a difference between the first power and the second power is calculated, and then the difference is subjected to preset conversion to obtain a standing wave value corresponding to each frequency source channel.

In this embodiment, each frequency source channel corresponds to one standing wave information, and the standing wave information of each frequency source channel may be the same or different. And respectively controlling the working states of the corresponding frequency source channels according to the standing wave information of each frequency source channel.

Step 303, determining target operating parameters for heating the heated object by the microwave generating device according to the standing wave information, wherein the target operating parameters comprise target operating frequency, target operating phase and target transmitting power.

The target operating parameters may be operating parameters corresponding to an optimal operating mode of the microwave generating device, and may include, for example, an optimal operating frequency, an optimal operating phase, and an optimal transmitting power. In the optimal working mode, each frequency source channel works under the respective optimal working frequency, optimal working phase and optimal transmitting power, and the heating efficiency of the microwave generating device to the heated object is the highest.

In some embodiments, the frequency of the microwave signal corresponding to the minimum value of the standing wave value in a certain time period may be taken as the target operating frequency, the phase of the microwave signal corresponding to the minimum value of the standing wave value may be taken as the target operating phase, and the transmitting power of the microwave signal corresponding to the minimum value of the standing wave value may be taken as the target transmitting frequency. Thereby, an optimal operation mode of the microwave generating device in the time period can be obtained.

And step 304, controlling the microwave generating device to heat the heated object according to the target operating parameters.

For example, a microprocessor of the microwave generating device may generate a control instruction according to a target operating parameter, and a signal generating unit, a numerical control attenuator, an electrical tuning attenuator, and a digital phase shifter in a frequency source chip of the microwave generating device receive the operating instruction, and adjust the operating parameter of the microwave generating device to the target operating parameter or to approach the target operating parameter. The microwave generator heats the object to be heated according to the target operating frequency, the target operating phase, and the target emission frequency determined in step 103.

For example, the control instructions may include a frequency adjustment instruction, a first attenuation instruction, and a second attenuation instruction. For example, the frequency adjustment command may be a frequency code command, the first attenuation command may be an attenuation value command, and the second attenuation command may be a voltage value command. And the signal generating unit realizes the accurate adjustment of the working frequency of the signal according to the frequency adjusting instruction. The numerical control attenuator adjusts the power of the signal in a large range according to the first attenuation instruction, and the electric-tuning attenuator precisely adjusts the power of the signal according to the second attenuation instruction.

In some embodiments, the frequency code instructions may be generated based on the target operating frequency and the current operating frequency. A phase value command may be generated based on the target operating phase and the current operating phase. The attenuation value command and the voltage value command may be generated based on the target transmit power and the current transmit power.

For convenience of description, the adjustment of the signal by the digitally controlled attenuator is referred to as a first attenuation process, and the adjustment of the signal by the electrically adjusted attenuator is referred to as a second attenuation process. The first attenuation processing can be desaturation attenuation of the signal; the second attenuation process may be a more accurate attenuation after the signal is de-guaranteed and attenuated.

Specifically, the first attenuation process may be implemented by performing a large-amplitude attenuation (or coarse attenuation) on the signal by using a numerical control attenuator, and the second attenuation process may be implemented by performing a small-amplitude attenuation (or precise attenuation) on the signal by using an electrical adjustable attenuator. The signal is attenuated to a set value through second attenuation processing after the signal is attenuated to gain unsaturation through the numerical control attenuator.

It is understood that the signal gain is linear to a certain degree, but when the signal gain is increased to a certain degree, the signal gain tends to be saturated or even decreased. Therefore, the digital control attenuator can be used to attenuate the signal to the set value before saturation (i.e. the desaturation attenuation), and then the second attenuation process with higher precision is performed to attenuate the signal to the set value, so that the attenuation precision and efficiency can be improved.

Optionally, the control instructions may also include channel switch instructions. And the channel switch of each frequency source channel realizes the control of the opening and/or the disconnection of the corresponding frequency source channel according to the channel switch instruction. For example, the channel switch closing command may be implemented in the form of a pulse command.

According to the microwave heating control method, in the process that the microwave generating device heats the heated object, the first power of the transmitting signal and the second power of the reflecting signal of each frequency source channel under the first working frequency and the first working phase are obtained. Then, according to the first power and the second power of each frequency source channel, the standing wave information of the heated object under the first working frequency and the first working phase is determined. And determining target working parameters of the microwave generating device for heating the heated object according to the standing wave information, wherein the target working parameters comprise a target working frequency, a target working phase and a target transmitting power. And finally, controlling a frequency source of the microwave generating device to heat the heated object according to the target working parameters.

According to the microwave heating control method, the target working parameters of the microwave generating device for heating the heated object are determined through the standing wave information, and the microwave generating device heats the heated object according to the target working parameters, so that the working frequency, the working phase and the emission power are adjustable, the heating efficiency of the heated object can be improved, and the control precision of the signal emission power is improved.

Based on the microwave generating device, the embodiment of the application also provides a method for controlling the energy of the frequency source to be accurately output. Referring to fig. 10, the method for controlling the precise output of the energy of the frequency source may include steps 401 to 404.

Step 401, during the heating process of the object to be heated by the microwave generating device, acquiring a first power of the transmitting signal and a second power of the reflected signal of each frequency source channel at the first operating frequency and the first operating phase.

The microwave generating device can be provided with two or more frequency source channels, and each frequency source channel can generate a transmitting signal with set frequency, set phase and set power. The signals generated by the frequency source channels are transmitted to the heated object through the corresponding regulating circuits, the heated object can transmit the signals, and the regulating circuits can acquire the signals transmitted back by the heated object. Therefore, the transmission signal is a signal projected onto the heating object by the adjusting circuit, and the reflection signal is a signal reflected back after the adjusting circuit is projected onto the heating object.

Step 402, according to the first power and the second power of each frequency source channel, determining standing wave information of the heated object under the first working frequency and the first working phase.

In some embodiments, step 402 may comprise: and for each frequency source channel, determining standing wave information corresponding to the frequency source channel according to the first power and the second power. Wherein the standing wave value corresponding to each frequency source channel can be determined based on a difference between the first power and the second power. For example, a difference between the first power and the second power is calculated, and then the difference is subjected to preset conversion to obtain a standing wave value corresponding to each frequency source channel.

And step 403, determining target transmitting power according to the standing wave information.

The target transmission power may be a transmission power corresponding to an optimal operation mode of the microwave generating device, for example, the target transmission power may be an optimal transmission power. In the optimal working mode, each frequency source channel works under the respective optimal working frequency, optimal working phase and optimal transmitting power, and the heating efficiency of the microwave generating device to the heated object is the highest.

In some embodiments, the frequency of the microwave signal corresponding to the minimum value of the standing wave values in the preset time period may be used as the target operating frequency, the phase of the microwave signal corresponding to the minimum value of the standing wave values may be used as the target operating phase, and the transmitting power of the microwave signal corresponding to the minimum value of the standing wave values may be used as the target transmitting frequency. Thereby, an optimal operation mode of the microwave generating device in the time period can be obtained.

And 404, sending a second attenuation instruction to an electrically-adjusted attenuator in a frequency source of the microwave generating device based on the target transmitting power.

The second attenuation instruction is used for indicating the electrically-adjusted attenuator to perform second attenuation processing on the signal, and the precision of the second attenuation processing is higher and is greater than the preset precision.

In some embodiments, the method may further include: sending a first attenuation instruction to a numerical control attenuator in a frequency source of the microwave generating device; the first attenuation instruction is used for instructing the numerical control attenuator to perform first attenuation processing on a signal, and the precision of the first attenuation processing is lower than that of the second attenuation processing.

The numerical control attenuator performs first attenuation processing on the power of the signal according to the first attenuation instruction, the electrically-adjustable attenuator in the frequency source performs second attenuation processing on the power of the signal according to the second attenuation instruction, and the precision of the second attenuation processing is greater than that of the first attenuation processing. For example, the numerical control attenuator can adjust the power of the signal in a large range according to the first attenuation instruction, and the electrically adjustable attenuator can finely adjust the power of the signal according to the second attenuation instruction.

For example, the first attenuation process may be desaturation attenuation of the signal; the second attenuation process may be a more accurate attenuation after the signal is de-guaranteed and attenuated.

Specifically, the first attenuation process may be implemented by performing a large-amplitude attenuation (also referred to as a coarse attenuation) on the signal by using a numerical control attenuator, and the second attenuation process may be implemented by performing a small-amplitude attenuation (also referred to as a precise attenuation) on the signal by using an electrically adjustable attenuator. The signal is firstly attenuated to gain unsaturation through the numerical control attenuator, and then the signal is attenuated to a set value through second attenuation processing.

As an implementation, the first attenuation instruction and the second attenuation instruction may be generated according to the target transmission power and the current transmission power.

For example, a difference between the target transmitting power and the current transmitting power is calculated, and a first attenuation instruction and a second attenuation instruction are generated according to the difference, the parameters of the numerical control attenuator and the parameters of the electric adjusting attenuator. The parameters of the numerical control attenuator can comprise a first attenuation range and a first attenuation precision, and the parameters of the electrically adjustable attenuator can comprise a second attenuation range and a second attenuation precision.

In one scenario, a first attenuation instruction may be generated based on the difference and the first attenuation range such that the digitally controlled attenuator attenuates the power of the signal to a first transmit power based on the first attenuation instruction. The first transmitting power is larger than the target transmitting power, and the difference value between the first transmitting power and the target transmitting power is smaller than the second attenuation range. And then generating a second attenuation instruction according to the first power value and the target transmitting power. And enabling the electrically-adjusted attenuator to attenuate the power of the signal to the target transmitting power based on the second attenuation instruction.

In another scenario, if the difference is smaller than the second attenuation range, a second attenuation instruction is generated according to the difference and the target transmit power. The electrically-adjusted attenuator attenuates the power of the signal to the target transmitting power based on the second attenuation instruction. In this case, the signal may be attenuated without using a digitally controlled attenuator.

It should be noted that the frequency source of the microwave generating device may have a plurality of frequency source channels, and each frequency source channel may correspond to one digitally controlled attenuator and one electrically tuned attenuator. And the frequency source channels can be independent from each other and do not interfere with each other. Therefore, for each frequency source channel, in step 204, based on the target transmission power and the current transmission power of the frequency source channel, a first attenuation instruction may be sent to the numerical control attenuator in the frequency source channel, and a second attenuation instruction may be sent to the electrical adjustable attenuator in the frequency source channel.

According to the method for controlling the accurate output of the frequency source energy, in the process that the microwave generating device heats the heated object, the first power of the transmitting signal and the second power of the reflecting signal of each frequency source channel under the first working frequency and the first working phase are obtained. Then, according to the first power and the second power of each frequency source channel, the standing wave information of the heated object under the first working frequency and the first working phase is determined. And determining the target emission power of the microwave generating device for heating the heated object according to the standing wave information. And based on the target transmitting power, sending a first attenuation instruction to a numerical control attenuator in the frequency source, and sending a second attenuation instruction to an electrically-adjusted attenuator in the frequency source. And the numerical control attenuator in the frequency source performs first attenuation processing on the power of the signal according to the first attenuation instruction, the electrically-adjustable attenuator in the frequency source performs second attenuation processing on the power of the signal according to the second attenuation instruction, and the precision of the second attenuation processing is greater than that of the first attenuation processing.

According to the method for controlling the accurate output of the frequency source energy, a first attenuation instruction is sent to the numerical control attenuator according to the target transmitting power, a second attenuation instruction is sent to the electric regulation attenuator, the numerical control attenuator carries out first attenuation processing on the power of a signal according to the first attenuation instruction, the electric regulation attenuator carries out second attenuation processing on the power of the signal according to the second attenuation instruction, and the precision of the second attenuation processing is larger than that of the first attenuation processing, so that the precision of the frequency source energy output can be improved through the control over the numerical control attenuator and the electric regulation attenuator, and the actual power output by the frequency source is closer to or equal to the target transmitting power.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Referring to fig. 11, an apparatus 500 for controlling precise output of energy from a frequency source is provided in an embodiment of the present application, including: an acquisition module 501, a standing wave information determination module 502, a power determination module 503, and a heating control module 504.

The acquiring module 501 is configured to acquire a first power of the transmission signal and a second power of the reflection signal of each frequency source channel at the first operating frequency and the first operating phase during the heating process of the object to be heated by the microwave generating device.

A standing wave information determining module 502, configured to determine standing wave information of the heated object at the first operating frequency and the first operating phase according to the first power and the second power of each frequency source channel.

And a power determining module 503, configured to determine a target transmission power according to the standing wave information.

An instruction sending module 504, configured to send a second attenuation instruction to an electrical tuning attenuator in a frequency source of the microwave generating apparatus based on the target transmitting power, where the second attenuation instruction is used to instruct the electrical tuning attenuator to perform second attenuation processing on a signal.

According to the device for controlling the accurate output of the frequency source energy, the second attenuation instruction is sent to the electrically-adjustable attenuator according to the target transmitting power, the electrically-adjustable attenuator performs second attenuation processing on the power of the signal according to the second attenuation instruction, and the second attenuation processing precision is higher (higher than the preset precision), so that the precision of the frequency source energy output can be improved through the control of the electrically-adjustable attenuator, and the actual power output by the frequency source is closer to or equal to the target transmitting power.

Fig. 12 is a schematic diagram of an electronic device according to an embodiment of the present invention. As shown in fig. 12, the electronic apparatus 600 of this embodiment includes: a processor 601, a memory 602, and a computer program stored in the memory 602 and operable on the processor 601, such as a program for controlling the accurate output of energy from a frequency source. The processor 601, when executing the computer program, implements the steps in the above-mentioned method embodiment for controlling the precise output of the energy of the frequency source, such as steps 401 to 404 shown in fig. 10. Alternatively, the processor 601, when executing the computer program, implements the functions of the modules in the above device embodiments, for example, the functions of the modules 501 to 504 shown in fig. 11.

Illustratively, the computer program may be partitioned into one or more modules that are stored in the memory 602 and executed by the processor 601 to implement the present invention. The one or more modules may be a series of computer program instruction segments capable of performing certain functions, which are used to describe the execution of the computer program in the electronic device 600. For example, the computer program may be divided into an acquisition module, a standing wave information determination module, a power determination module, and an instruction transmission module as shown in fig. 11.

The electronic device 600 may be a microwave oven, an electric oven, or other microwave heating device. The electronic device 600 may include, but is not limited to, a processor 601, a memory 602. Those skilled in the art will appreciate that fig. 12 is merely an example of the electronic device 600, and does not constitute a limitation of the electronic device 600, and may include more or fewer components than those shown, or some of the components may be combined, or different components, e.g., the terminal device may also include an input-output device, a network access device, a bus, etc.

The Processor 601 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The storage 602 may be an internal storage unit of the electronic device 600, such as a hard disk or a memory of the electronic device 600. The memory 602 may also be an external storage device of the electronic device 600, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the electronic device 600. Further, the memory 602 may also include both internal storage units and external storage devices of the electronic device 600. The memory 602 is used for storing the computer programs and other programs and data required by the terminal device. The memory 602 may also be used to temporarily store data that has been output or is to be output.

Optionally, in some embodiments, the present application further provides a computer-readable storage medium having stored therein instructions, which when executed on a computer or a processor, cause the computer or the processor to perform one or more steps of any one of the above methods.

Optionally, in some embodiments, the present application further provides a computer program product containing instructions, which when run on a computer or a processor, causes the computer or the processor to perform one or more steps of any of the methods described above.

Optionally, in some embodiments, the present application further provides a chip system, where the chip system may include a memory and a processor, and the processor executes a computer program stored in the memory to implement one or more steps of any of the above methods. The chip system can be a single chip or a chip module consisting of a plurality of chips.

Optionally, in some embodiments, the present application further provides a chip system, and the chip system may include a processor, the processor is coupled with a memory, and the processor executes a computer program stored in the memory to implement one or more steps of any of the above methods. The chip system can be a single chip or a chip module consisting of a plurality of chips.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. . Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A method for controlling the precise output of frequency source energy is applied to a microwave generating device with a plurality of frequency source channels, and comprises the following steps:

acquiring first power of a transmitting signal and second power of a reflected signal of each frequency source channel under a first working frequency and a first working phase in the process of heating a heated object by a microwave generating device;

determining standing wave information of the heated object at the first working frequency and the first working phase according to the first power and the second power of each frequency source channel;

determining target transmitting power according to the standing wave information;

and sending a second attenuation instruction to an electric adjusting attenuator in a frequency source of the microwave generating device based on the target transmitting power, wherein the second attenuation instruction is used for instructing the electric adjusting attenuator to perform second attenuation processing on the signal.

2. The method of claim 1, wherein determining standing wave information of the heated object at the first operating frequency and the first operating phase from the first power and the second power of each frequency source channel comprises:

calculating a difference between the first power and the second power;

and carrying out preset conversion on the difference value to obtain a standing wave value corresponding to each frequency source channel.

3. The method of claim 1, wherein determining a target transmit power from the standing wave information comprises:

and taking the transmitting power of the microwave signal corresponding to the minimum value of the standing wave value in the preset time period as the target transmitting frequency.

4. The method for controlling the precise energy output of the frequency source according to claim 1, wherein the sending a second attenuation instruction to an electrically-controlled attenuator in the frequency source of the microwave generating apparatus based on the target transmitting power includes:

generating the second attenuation instruction according to the first transmission power and the target transmission power, so that the electric attenuator attenuates the power of a signal to the target transmission power based on the second attenuation instruction;

and sending the second attenuation instruction to the electrically adjusted attenuator.

5. The method for controlling accurate output of frequency source energy according to claim 1, wherein the microwave generating device includes at least two adjusting circuits, each adjusting circuit corresponds to one of the frequency source channels, and each adjusting circuit includes a coupler and a circulator;

the acquiring a first power of a transmission signal and a second power of a reflection signal of each frequency source channel at a first operating frequency and a first operating phase includes:

acquiring first power of each path of regulating circuit through a coupler of each path of regulating circuit;

and acquiring the second power of each path of regulating circuit through the circulator of each path of regulating circuit.

6. The method of claim 1, further comprising:

sending a first attenuation instruction to a numerical control attenuator in a frequency source of the microwave generating device;

the first attenuation instruction is used for instructing the numerical control attenuator to perform first attenuation processing on a signal, and the precision of the first attenuation processing is lower than that of the second attenuation processing.

7. The method of claim 6, wherein said sending a first attenuation command to a digitally controlled attenuator in a frequency source of said microwave generating device comprises:

calculating the difference between the target transmitting frequency and the current transmitting frequency;

generating the first attenuation instruction according to the difference and a first attenuation range of the numerical control attenuator, so that the numerical control attenuator attenuates the power of a signal to first transmission power based on the first attenuation instruction, wherein the first transmission power is greater than the target transmission power, and the difference between the first transmission power and the target transmission power is smaller than a second attenuation range of the electrically-adjustable attenuator;

and sending the first attenuation instruction to the numerical control attenuator.

8. An apparatus for controlling precise output of energy from a frequency source, for use in a microwave generating apparatus having a plurality of frequency source channels, the apparatus comprising:

the microwave heating device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring first power of a transmitting signal and second power of a reflected signal of each frequency source channel under a first working frequency and a first working phase in the process of heating a heated object by the microwave generating device;

a standing wave information determination module for determining standing wave information of the heated object at the first operating frequency and the first operating phase according to the first power and the second power of each frequency source channel;

the power determining module is used for determining target transmitting power according to the standing wave information;

and the instruction sending module is used for sending a second attenuation instruction to the electric adjusting attenuator in the frequency source of the microwave generating device based on the target transmitting power, wherein the second attenuation instruction is used for indicating the electric adjusting attenuator to perform second attenuation processing on the signal.

9. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor when executing the computer program implements the steps of the method of controlling the precise output of energy from a frequency source as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of controlling the precise output of energy from a frequency source as claimed in any one of claims 1 to 7 above.