阅读说明：本技术 控制方法、微波设备和存储介质 (Control method, microwave device and storage medium ) 是由 吴添洪 陈茂顺 唐相伟 于 2020-05-29 设计创作，主要内容包括：本发明公开了一种控制方法、微波设备和存储介质。控制方法用于微波设备,微波设备包括微波源,控制方法包括：从预设的扫描频段中确定标识频点；在微波设备加热的过程中,控制微波源以第一功率在标识频点进行扫描,以确定目标回损值；控制微波源以第二功率在标识频点进行扫描,以确定当前回损值,第二功率小于第一功率；在当前回损值与目标回损值的差异小于预设阈值的情况下,控制微波源以第二功率在扫描频段进行全频段扫描,以确定回损信息；根据回损信息控制微波设备运行。如此,可以提高回损信息的准确性并使得扫描功率较小,从而使得根据回损信息对微波设备的控制更加准确,并降低扫描对加热过程的影响。(The invention discloses a control method, microwave equipment and a storage medium. The control method is used for the microwave equipment, the microwave equipment comprises a microwave source, and the control method comprises the following steps: determining an identification frequency point from a preset scanning frequency band; in the heating process of the microwave equipment, controlling a microwave source to scan at an identification frequency point with first power so as to determine a target return loss value; controlling a microwave source to scan at the identification frequency point by second power so as to determine a current return loss value, wherein the second power is smaller than the first power; under the condition that the difference between the current return loss value and the target return loss value is smaller than a preset threshold value, controlling the microwave source to perform full-band scanning in a scanning frequency band at a second power so as to determine return loss information; and controlling the microwave equipment to operate according to the return loss information. Therefore, the accuracy of return loss information can be improved, the scanning power is lower, the control of the microwave equipment according to the return loss information is more accurate, and the influence of scanning on the heating process is reduced.)

1. A control method for a microwave apparatus, the microwave apparatus comprising a microwave source, the control method comprising:

determining an identification frequency point from a preset scanning frequency band;

in the heating process of the microwave equipment, controlling the microwave source to scan at the identification frequency point with first power so as to determine a target return loss value;

controlling the microwave source to scan at the identification frequency point by second power so as to determine a current return loss value, wherein the second power is smaller than the first power;

under the condition that the difference between the current return loss value and the target return loss value is smaller than a preset threshold value, controlling the microwave source to perform full-band scanning in the scanning frequency band at a second power so as to determine return loss information;

and controlling the microwave equipment to operate according to the return loss information.

2. The control method according to claim 1, wherein controlling the microwave source to scan at the identified frequency point with a first power to determine a target return loss value comprises:

controlling the microwave source to scan for multiple times at the identification frequency point by first power so as to determine a plurality of identification return loss values;

and determining the target return loss value according to the plurality of identification return loss values.

3. The control method according to claim 1, wherein the number of the identified frequency points is plural, and controlling the microwave source to scan at the identified frequency points with a first power to determine a target return loss value comprises:

controlling the microwave source to scan at a plurality of the identification frequency points with a first power so as to determine a target return loss value of each identification frequency point;

controlling the microwave source to scan at the identification frequency point with a second power to determine a current return loss value, including;

controlling the microwave source to scan at a plurality of the identification frequency points with a second power so as to determine the current return loss value of each identification frequency point;

the control method comprises the following steps:

and under the condition that the deviation between the current return loss value and the target return loss value corresponding to each identification frequency point is smaller than the preset threshold, determining that the difference between the current return loss value and the target return loss value is smaller than the preset threshold.

4. The control method according to claim 1, characterized by comprising:

acquiring a preset adjusting parameter under the condition that the deviation between the current return loss value and the target return loss value is greater than or equal to the preset threshold value;

and updating the second power according to the adjustment parameter, and entering the step of controlling the microwave source to scan the identification frequency point by the second power so as to determine the current return loss value.

5. The control method of claim 4, wherein adjusting the parameter comprises adjusting power, and wherein updating the second power according to the adjustment parameter comprises:

and taking the sum of the adjusted power and the second power before updating as the updated second power.

6. The control method according to claim 4, characterized by comprising:

under the condition that the second power is smaller than or equal to a preset third power, the step of controlling the microwave source to scan at the identification frequency point by the second power so as to determine a current return loss value is entered, wherein the third power is smaller than the first power;

and under the condition that the second power is greater than the third power, controlling the microwave source to perform full-band scanning in the scanning frequency band by using the third power so as to determine return loss information.

7. The microwave equipment is characterized by comprising a microwave source and a controller, wherein the controller is used for determining an identification frequency point from a preset scanning frequency band; and the microwave source is controlled to scan at the identification frequency point with first power in the heating process of the microwave equipment so as to determine a target return loss value; the microwave source is used for controlling the microwave source to scan at the identification frequency point by second power so as to determine a current return loss value, and the second power is smaller than the first power; and the microwave source is controlled to perform full-band scanning in the scanning frequency band at a second power under the condition that the difference between the current return loss value and the target return loss value is smaller than a preset threshold value so as to determine return loss information; and the microwave equipment is controlled to operate according to the return loss information.

8. The microwave device of claim 7, wherein the controller is configured to control the microwave source to scan the identified frequency point multiple times at a first power to determine multiple identified return loss values; and means for determining the target return loss value from the plurality of identified return loss values.

9. The microwave device according to claim 7, wherein the number of the identification frequency points is plural, and the controller is configured to control the microwave source to scan at the plural identification frequency points with a first power, so as to determine a target return loss value of each of the identification frequency points; the microwave source is controlled to scan at a plurality of the identification frequency points with a second power so as to determine the current return loss value of each identification frequency point; and the processing unit is used for determining that the difference between the current return loss value and the target return loss value is smaller than the preset threshold value under the condition that the deviation between the current return loss value and the target return loss value corresponding to each identification frequency point is smaller than the preset threshold value.

10. The microwave device according to claim 7, wherein the controller is configured to obtain a preset adjustment parameter if a deviation between the current return loss value and the target return loss value is greater than or equal to the preset threshold; and the step of updating the second power according to the adjustment parameter and controlling the microwave source to scan the identification frequency point with the second power so as to determine the current return loss value.

11. The microwave device according to claim 10, wherein the adjustment parameter comprises an adjustment power, and the controller is configured to use a sum of the adjustment power and the second power before updating as the updated second power.

12. The microwave device according to claim 7, wherein the controller is configured to enter the step of controlling the microwave source to scan the identified frequency point with the second power to determine a current return loss value if the second power is less than or equal to a preset third power, where the third power is less than the first power; and the microwave source is controlled to perform full-band scanning in the scanning frequency band at the third power under the condition that the second power is greater than the third power so as to determine return loss information.

13. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements the steps of the control method according to any one of claims 1 to 6.

Technical Field

The present invention relates to household appliances, and more particularly, to a control method, a microwave device, and a storage medium.

Background

In the related art, a microwave device using a semiconductor power amplifier as a power source generally performs scanning during heating food, so as to obtain the response characteristic of a cavity containing food through signal excitation and reflection detection, thereby providing a basis for a subsequent heating algorithm. In order to reduce the influence of the sampling detection on the heating process, the related art generally selects as low an excitation power as possible for the sampling detection. However, this tends to result in inaccurate adjustment of the heating algorithm, thereby making the heating less effective.

Disclosure of Invention

The embodiment of the invention provides a control method, microwave equipment and a storage medium.

The control method of the embodiment of the invention is used for microwave equipment, the microwave equipment comprises a microwave source, and the control method comprises the following steps:

determining an identification frequency point from a preset scanning frequency band;

in the heating process of the microwave equipment, controlling the microwave source to scan at the identification frequency point with first power so as to determine a target return loss value;

controlling the microwave source to scan at the identification frequency point by second power so as to determine a current return loss value, wherein the second power is smaller than the first power;

under the condition that the difference between the current return loss value and the target return loss value is smaller than a preset threshold value, controlling the microwave source to perform full-band scanning in the scanning frequency band at a second power so as to determine return loss information;

and controlling the microwave equipment to operate according to the return loss information.

According to the control method provided by the embodiment of the invention, the identification frequency point in the scanning frequency band is scanned with larger first power to determine the target return loss value, then the identification frequency point is scanned with smaller second power to determine the current return loss value, and under the condition that the difference between the current return loss value and the target return loss value is smaller than the preset threshold value, the scanning frequency band is scanned with the second power to determine the return loss information in a full-frequency band manner, so that the accuracy of the return loss information can be improved, the scanning power is smaller, the control of the microwave equipment according to the return loss information is more accurate, and the influence of the scanning on the heating process is reduced.

In some embodiments, controlling the microwave source to scan at the identified frequency point at a first power to determine a target return loss value comprises:

controlling the microwave source to scan for multiple times at the identification frequency point by first power so as to determine a plurality of identification return loss values;

and determining the target return loss value according to the plurality of identification return loss values.

In some embodiments, the number of the identified frequency points is multiple, and controlling the microwave source to scan at the identified frequency points with a first power to determine a target return loss value includes:

controlling the microwave source to scan at a plurality of the identification frequency points with a first power so as to determine a target return loss value of each identification frequency point;

controlling the microwave source to scan at the identification frequency point with a second power to determine a current return loss value, including;

controlling the microwave source to scan at a plurality of the identification frequency points with a second power so as to determine the current return loss value of each identification frequency point;

the control method comprises the following steps:

and under the condition that the deviation between the current return loss value and the target return loss value corresponding to each identification frequency point is smaller than the preset threshold, determining that the difference between the current return loss value and the target return loss value is smaller than the preset threshold.

In certain embodiments, the control method comprises:

acquiring a preset adjusting parameter under the condition that the deviation between the current return loss value and the target return loss value is greater than or equal to the preset threshold value;

and updating the second power according to the adjustment parameter, and entering the step of controlling the microwave source to scan the identification frequency point by the second power so as to determine the current return loss value.

In some embodiments, the adjusting the parameter includes adjusting a power, and updating the second power according to the adjusting parameter includes:

and taking the sum of the adjusted power and the second power before updating as the updated second power.

In certain embodiments, the control method comprises:

under the condition that the second power is smaller than or equal to a preset third power, the step of controlling the microwave source to scan at the identification frequency point by the second power so as to determine a current return loss value is entered, wherein the third power is smaller than the first power;

and under the condition that the second power is greater than the third power, controlling the microwave source to perform full-band scanning in the scanning frequency band by using the third power so as to determine return loss information.

The microwave equipment comprises a microwave source and a controller, wherein the controller is used for determining an identification frequency point from a preset scanning frequency band; and the microwave source is controlled to scan at the identification frequency point with first power in the heating process of the microwave equipment so as to determine a target return loss value; the microwave source is used for controlling the microwave source to scan at the identification frequency point by second power so as to determine a current return loss value, and the second power is smaller than the first power; and the microwave source is controlled to perform full-band scanning in the scanning frequency band at a second power under the condition that the difference between the current return loss value and the target return loss value is smaller than a preset threshold value so as to determine return loss information; and the microwave equipment is controlled to operate according to the return loss information.

According to the microwave equipment provided by the embodiment of the invention, the identification frequency point in the scanning frequency band is scanned with larger first power to determine the target return loss value, then the identification frequency point is scanned with smaller second power to determine the current return loss value, and under the condition that the difference between the current return loss value and the target return loss value is smaller than the preset threshold value, the scanning frequency band is scanned with the second power to determine the return loss information in a full-frequency band manner, so that the accuracy of the return loss information can be improved, the scanning power is smaller, the microwave equipment can be controlled more accurately according to the return loss information, and the influence of scanning on the heating process is reduced.

In some embodiments, the controller is configured to control the microwave source to perform a plurality of scans at the identified frequency point at a first power to determine a plurality of identified return loss values; and means for determining the target return loss value from the plurality of identified return loss values.

In some embodiments, the number of the identified frequency points is multiple, and the controller is configured to control the microwave source to scan the multiple identified frequency points at a first power, so as to determine a target return loss value of each identified frequency point; the microwave source is controlled to scan at a plurality of the identification frequency points with a second power so as to determine the current return loss value of each identification frequency point; and the processing unit is used for determining that the difference between the current return loss value and the target return loss value is smaller than the preset threshold value under the condition that the deviation between the current return loss value and the target return loss value corresponding to each identification frequency point is smaller than the preset threshold value.

In some embodiments, the controller is configured to obtain a preset adjustment parameter if a deviation between the current return loss value and the target return loss value is greater than or equal to the preset threshold; and the step of updating the second power according to the adjustment parameter and controlling the microwave source to scan the identification frequency point with the second power so as to determine the current return loss value.

In some embodiments, the adjustment parameter comprises an adjusted power, and the controller is configured to determine a sum of the adjusted power and the second power before updating as the updated second power.

In some embodiments, the controller is configured to enter the step of controlling the microwave source to scan the identified frequency point with the second power to determine a current return loss value when the second power is less than or equal to a preset third power, where the third power is less than the first power; and the microwave source is controlled to perform full-band scanning in the scanning frequency band at the third power under the condition that the second power is greater than the third power so as to determine return loss information.

A computer-readable storage medium of an embodiment of the present invention has a computer program stored thereon, which when executed by a processor, implements the steps of the control method of any of the above-described embodiments.

The computer-readable storage medium of the embodiment of the invention scans the identification frequency point in the scanning frequency band with a larger first power to determine the target return loss value, then scans the identification frequency point with a smaller second power to determine the current return loss value, and scans the full frequency band in the scanning frequency band with the second power to determine the return loss information under the condition that the difference between the current return loss value and the target return loss value is smaller than the preset threshold value, so that the accuracy of the return loss information can be improved, the scanning power is smaller, the control of the microwave equipment according to the return loss information is more accurate, and the influence of the scanning on the heating process is reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic flow chart of a control method according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a microwave apparatus according to an embodiment of the present invention;

FIG. 3 is a block schematic diagram of a microwave apparatus according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of a control method according to another embodiment of the present invention;

FIG. 5 is a schematic flow chart of a control method according to yet another embodiment of the present invention;

FIG. 6 is a flow chart illustrating a control method according to still another embodiment of the present invention;

FIG. 7 is a schematic flow chart of a control method according to another embodiment of the present invention;

fig. 8 is a flowchart illustrating a control method according to still another embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

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

In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

Referring to fig. 1 and 2, a control method and a microwave apparatus 100 are provided according to an embodiment of the present invention. The control method is used for the microwave device 100, the microwave device 100 comprises a microwave source 110, and the control method comprises the following steps:

step S11: determining an identification frequency point from a preset scanning frequency band;

step S12: in the heating process of the microwave device 100, controlling the microwave source 110 to scan at the identification frequency point with a first power to determine a target return loss value;

step S14: controlling the microwave source 110 to scan at the identified frequency point with a second power to determine a current return loss value, wherein the second power is smaller than the first power;

step S16: under the condition that the difference between the current return loss value and the target return loss value is smaller than a preset threshold value, controlling the microwave source 110 to perform full-band scanning in a scanning frequency band at a second power so as to determine return loss information;

step S19: the operation of the microwave device 100 is controlled according to the return loss information.

The control method in the embodiment of the present invention can be implemented by the microwave apparatus 100 in the embodiment of the present invention.

Referring to fig. 3, a microwave device 100 according to an embodiment of the present invention includes a microwave source 110 and a controller 120, where the controller 120 is configured to determine an identification frequency point from a preset scanning frequency band; and is used for controlling the microwave source 110 to scan at the identification frequency point with the first power in the heating process of the microwave device 100 so as to determine the target return loss value; and is used for controlling the microwave source 110 to scan at the identification frequency point with a second power to determine the current return loss value, wherein the second power is smaller than the first power; and is used for controlling the microwave source 110 to perform full-band scanning in a scanning frequency band with a second power to determine return loss information under the condition that the difference between the current return loss value and the target return loss value is smaller than a preset threshold value; and for controlling the operation of the microwave device 100 in dependence on the return loss information.

According to the control method and the microwave device 100 provided by the embodiment of the invention, the identification frequency point in the scanning frequency band is scanned with a larger first power to determine the target return loss value, then the identification frequency point is scanned with a smaller second power to determine the current return loss value, and when the difference between the current return loss value and the target return loss value is smaller than the preset threshold value, the full-band scanning is performed in the scanning frequency band with the second power to determine the return loss information, so that the accuracy of the return loss information can be improved, the scanning power is smaller, the control of the microwave device 100 according to the return loss information is more accurate, and the influence of the scanning on the heating process is reduced.

Note that the return loss is also the return loss, which is a logarithmic value of the ratio of the emitted power to the reflected power. In other words, the target return loss value in the present embodiment is a logarithmic value of the ratio of the first power to the corresponding reflected power. The current return loss value in this embodiment is a logarithmic value of the ratio of the second power to the corresponding reflected power.

In addition, the return loss value can be converted with parameters such as reflection coefficient, standing wave value and the like. Therefore, parameters such as a reflection coefficient, a standing wave value and the like can be obtained firstly, and then a return loss value is determined according to the obtained parameters; or obtaining the return loss value, and determining parameters such as the reflection coefficient, the standing wave value and the like according to the return loss value.

It can be understood that, in the related art, the microwave device using the semiconductor power amplifier as the power source generally performs scanning during the process of heating food, so as to obtain the response characteristics of the cavity containing food through signal excitation and reflection detection, and quantize the response characteristics into different forms of return loss such as reflection coefficient and standing wave, thereby providing a basis for the subsequent heating algorithm, that is, providing a basis for updating the heating parameters.

Since the load, i.e. the food, responds differently at different frequencies, the reflection coefficient fluctuates within the available sweep frequency range. The more intense the fluctuation, the greater the number of frequency points that need to be scanned. Under the same sampling speed, the more the frequency points are, the longer the sampling time is required in the whole frequency band of the scanning frequency band. This results in a greater total energy of scanning within the scanning period relative to the total energy of heating of the heating process within the scanning period.

Furthermore, the related art generally requires that the heating process use certain specific frequency points, specific phases, at specific stages. Therefore, the scanning total energy with excessive specific gravity can interfere with the energy distribution of the heating process, influence the heating parameters, and further have great influence on the heating result. To avoid scan detection from affecting the heating process, the related art typically uses lower power levels during the scanning process.

For example: for a microwave device with a maximum power of about 500W, the scanning power is 10W, even less than 1W. Thus, the scanning power and total scanning energy are almost negligible with respect to the heating power and total heating energy.

However, because the heating power and the scanning power have a great difference, there is a deviation between the return loss value of the scanning result and the theoretical return loss value, and if the return loss information obtained by scanning with a small power is directly adopted to adjust the heating algorithm for heating with a large power, the adjustment of the heating algorithm is easily inaccurate, so that the heating effect is poor. Moreover, since the impedance of the microwave device varies greatly under different load conditions at different frequency points, the above deviation cannot be compensated by one-time calibration.

According to the control method and the microwave device 100 of the embodiment of the invention, under the condition that the difference between the current return loss value and the target return loss value is smaller than the preset threshold, the microwave source 110 is controlled to perform full-band scanning in the scanning frequency band at the second power to determine the return loss information, so that the scanning power can be ensured to reach the return loss value with smaller return loss value deviation corresponding to the larger first power at the smaller second power, and the influence of the scanning process on the heating process is reduced to the maximum extent. Moreover, because the second power of the full-band scanning in the scanning frequency band is lower, more scanning frequency points can be added in the scanning frequency band to more accurately describe and feed back the characteristics of food, so that the control of the microwave equipment 100 according to return loss information is more accurate, and the heating effect is better.

In the present embodiment, the microwave apparatus 100 is a semiconductor microwave oven. The microwave sources 110 are semiconductor microwave sources, the number of the microwave sources 110 can be 1, 2, 3 or other numbers, and the microwave sources 110 can generate microwave signals of 2.4GHz-2.5 GHz.

In other embodiments, microwave apparatus 100 may include a microwave dryer, a microwave sterilizer, and the like. The specific form of the microwave device 100 is not limited herein.

Referring to fig. 2 again, the microwave apparatus 100 further includes an antenna 130, a heating tube 140, and a side frame 150.

The antenna 130 is used to couple microwaves generated by the microwave source 110 into the cavity of the microwave device 100. It will be appreciated that in other embodiments, the microwaves generated by the microwave source 110 may be coupled into the cavity of the microwave apparatus 100 by other means, such as equivalent magnetron coupling, probe coupling, etc. In the example of fig. 2, the number of antennas 130 is 2. It is understood that the number of antennas 130 may be 1, 3, 4, or other numbers in other examples. The specific number of antennas 130 is not limited herein.

The heat generating pipe 140 may be disposed at the top of the case of the microwave apparatus 100, and the heat generating pipe 140 is used to emit high temperature infrared rays. The controller 120 can control the heating tube 140 to operate independently, and can also control the heating tube 140 to operate synchronously with the microwave source 110. Thus, different operation modes can be realized through the heating tube 140 and the microwave source 110.

The side frame 150 is provided at an inner wall of the microwave apparatus 100. The side frame 150 may be used to hold a tray of the microwave oven. In the example of fig. 2, the number of the side frames 150 is two, and the two side frames 150 are disposed to face each other. One of the side frames 150 is disposed at a first inner wall, and the other side frame 150 is disposed at a second inner wall opposite to the first inner wall.

In step S11, the scanning frequency band may be a frequency band ranging from 2.4GHz to 2.5 GHz. The scanning frequency band may be determined according to the range of the microwave generated by the microwave source 110. The scanning frequency range can also be set according to default information. The scanning frequency band can be set according to the input information. The input information may be information input by a user. The number of identification frequency points may be 1, 2, 3, 4 or other numbers. The specific source of the scanned frequency band and the specific number of the identified frequency points are not limited herein.

In step S12, the first power has a value range of: greater than 30W. Therefore, the first power is the power of the heating level, so that the accuracy of the determined target return loss value is ensured when the microwave source 110 scans the identification frequency point with the first power.

It will be appreciated that the closer the scanning power is to the actual heating power, the smaller the difference between the resulting return loss value and the theoretical value. The theoretical value is a return loss value obtained by scanning the same frequency point with an actual heating power. Therefore, with the first power in the above range, the target return loss value can be made closer to the theoretical value, i.e., more accurate.

In step S16, in the present embodiment, the difference between the current return loss value and the target return loss value may refer to a difference rate between the current return loss value and the target return loss value, and the preset threshold may be a percentage. In other words, the difference between the current return loss value and the target return loss value is (current return loss value-target return loss value)/target return loss value × 100%.

Therefore, the difference between the current return loss value and the target return loss value is measured in a percentage mode, and the deviation degree of the current return loss value relative to the target return loss value can be clearly reflected.

Specifically, the preset threshold may range from 0.5% to 5%. For example, 0.5%, 0.8%, 1%, 2.3%, 3.1%, 4.7%, 5%, or other values.

In the present embodiment, the preset threshold is 1%. Therefore, under the condition that the difference between the current return loss value and the target return loss value is less than 1%, the microwave source 110 is controlled to perform full-band scanning in the scanning frequency band by using the second power, so that the situation that the return loss information obtained by using the second power has small deviation can be ensured, the situation that the control time is too long or even cannot be achieved due to the fact that the difference requirement is too small can be avoided, and the efficiency is improved.

It is understood that, in other embodiments, the difference between the current return loss value and the target return loss value may refer to a difference between the current return loss value and the target return loss value, and the preset threshold may be a numerical value. The specific form of the difference between the current return loss value and the target return loss value is not limited herein.

In step S16, the phrase "controlling the microwave source 110 to perform full-band scanning in the scanning frequency band with the second power" means that the microwave source 110 is controlled to perform full-band and multi-frequency-point scanning in the scanning frequency band with the second power, that is, to perform scanning at all scanning frequency points in the scanning frequency band. It can be understood that the number of scanning frequency points is greater than the number of identification frequency points.

In this embodiment, the microwave source 110 may be controlled to scan all the scanning frequency points in the scanning frequency band with the second power according to the preset step length. Further, the microwave source 110 may be controlled to scan sequentially at all scanning frequency points within the scanning frequency band.

For example, the scanning frequency band is 2.4GHz-2.5GHz, and the preset step length is 0.01HZ, then the scanning can be performed at frequency point 2.4GHz, frequency point 2.41GHz, frequency point 2.42GHz, frequency point 2.43GHz, frequency point 2.44GHz, frequency point 2.45GHz, frequency point 2.46GHz, frequency point 2.47GHz, frequency point 2.48GHz, frequency point 2.49GHz, and frequency point 2.5GHz in sequence.

In other embodiments, the microwave source 110 may be controlled to scan at the second power at all of the scanning frequency points within the scanning frequency band according to the priority. Furthermore, the scanning can be performed on a plurality of scanning frequency points in the scanning frequency band according to the order of the priority from high to low. Therefore, scanning can be preferentially carried out at the scanning frequency points with higher priority, and the scanning efficiency is improved.

In step S16, the return loss information may include a return loss value corresponding to each scanned frequency bin. Thus, the return loss information is scanned based on the full frequency band, the scanning frequency points are more, and the characteristics of the load, namely the food, can be described more accurately, so that the microwave equipment 100 is controlled to operate more accurately.

In step S19, the heating parameters of the microwave device 100 may be revised according to the return loss information, and the microwave device 100 is controlled to operate according to the heating parameters. In this manner, the operation of the microwave apparatus 100 may be more accurately controlled by revising the heating parameters.

Taking thawing as an example, if it is determined from the return loss information that the temperature of the food has risen from-18 ℃ to-3 ℃ to 0 ℃, the heating power may be reduced or a preset on-off heating mode may be adopted to avoid local overheating of the food due to high-power heating.

Referring to fig. 4, in some embodiments, step S12 includes:

step S121: controlling the microwave source 110 to scan for multiple times at the identification frequency point with the first power so as to determine multiple identification return loss values;

step S122: and determining a target return loss value according to the plurality of identification return loss values.

In some embodiments, the controller 120 is configured to control the microwave source 110 to perform a plurality of scans at the identified frequency points at the first power to determine a plurality of identified return loss values; and for determining a target return loss value from the plurality of identified return loss values.

Therefore, multiple scanning is carried out at the identification frequency point, the target return loss value is determined according to the obtained multiple identification return loss values, the condition that the target return loss value is high due to the fact that only one scanning is carried out at the identification frequency point can be avoided, and the stability and the accuracy of the target return loss value are improved.

Specifically, in step S121, the microwave source 110 may be controlled to perform scanning for a preset number of times at the identified frequency point with the first power. Thus, since the preset number of times is a fixed value, this makes the number of scans predictable, thereby making the control method more stable.

In step S122, the average of the plurality of identified return loss values may be used as the target return loss value. Therefore, the target return loss value is uniformly influenced by the plurality of identification return loss values, and the accuracy of the target return loss value is improved.

In step S122, the mode of the plurality of identified return loss values may be set as the target return loss value. Therefore, the target return loss value is relatively concentrated data in the identification return loss values, the influence of the identification return loss value with larger deviation in the identification return loss values on the target return loss value is avoided, and the accuracy of the target return loss value is improved. Further, in a case where the number of modes of the plurality of identification loss values is plural, an average of the plural modes may be set as the target loss value. Thus, the accuracy of the target return loss value is further improved.

Referring to fig. 5, in some embodiments, the step S12 includes the following steps:

step S123: controlling a microwave source 110 to scan at a plurality of identification frequency points with a first power to determine a target return loss value of each identification frequency point;

step S14 includes;

step S141: controlling the microwave source 110 to scan at a plurality of identification frequency points with a second power to determine a current return loss value of each identification frequency point;

the control method comprises the following steps:

step S15: and under the condition that the difference between the current return loss value and the target return loss value corresponding to each identification frequency point is smaller than a preset threshold value, determining that the difference between the current return loss value and the target return loss value is smaller than the preset threshold value.

In some embodiments, the number of the identified frequency points is multiple, and the controller 120 is configured to control the microwave source 110 to scan the multiple identified frequency points at the first power to determine a target return loss value of each identified frequency point; and is used for controlling the microwave source 110 to scan at the plurality of identification frequency points with the second power so as to determine the current return loss value of each identification frequency point; and the processing unit is used for determining that the difference between the current return loss value and the target return loss value is smaller than the preset threshold value under the condition that the difference between the current return loss value and the target return loss value corresponding to each identification frequency point is smaller than the preset threshold value.

Therefore, under the condition that the microwave source 110 performs full-band scanning in the scanning frequency band at the second power, the return loss value corresponding to each scanning frequency point in the return loss information is close to the target value obtained by scanning at each scanning frequency point at the first power, which is beneficial to improving the accuracy of the return loss information.

Specifically, the number of identification frequency points may be 2, 3, 4, or other numbers. The specific number of identified frequency points is not limited herein.

In one example, the heat generating device 100 is a 2.45GHz semiconductor microwave oven, the scanning frequency band is 2.4GHz to 2.5GHz, the number of identification frequency points is 3, and the 3 identification frequency points are respectively: 2.4GHz, 2.45GHz and 2.5 GHz. The microwave source 110 may be controlled to scan at the first power at 2.4GHz, 2.45GHz, and 2.5GHz to determine a target return loss value for each identified frequency bin. And then controlling the microwave source 110 to scan at 2.4GHz, 2.45GHz and 2.5GHz with the second power so as to determine the current return loss value of each identification frequency point. Under the condition that the difference between the current return loss value corresponding to 2.4GHz and the target return loss value is smaller than a preset threshold value, the difference between the current return loss value corresponding to 2.45GHz and the target return loss value is smaller than the preset threshold value, and the difference between the current return loss value corresponding to 2.5GHz and the target return loss value is smaller than the preset threshold value, the difference between the current return loss value and the target return loss value can be determined to be smaller than the preset threshold value, so that the microwave source 110 is controlled to perform full-band scanning on a scanning frequency band at a second power to determine return loss information; and controls the operation of the microwave device 100 according to the return loss information.

Referring to fig. 6, in some embodiments, the control method includes:

step S17: acquiring a preset adjusting parameter under the condition that the difference between the current return loss value and the target return loss value is greater than or equal to a preset threshold value;

step S18: the second power is updated according to the adjustment parameter, and the process proceeds to step S14.

In some embodiments, the controller 120 is configured to obtain a preset adjustment parameter when a difference between the current return loss value and the target return loss value is greater than or equal to a preset threshold; and a step for updating the second power according to the adjustment parameter, and controlling the microwave source 110 to scan at the identified frequency point with the second power to determine the current return loss value.

Therefore, under the condition that the difference between the current return loss value and the target return loss value is larger than or equal to the preset threshold value, the second power is updated through adjusting the parameters, and then the updated second power is adopted to scan at the identification frequency point to determine the current return loss value, so that the difference between the current return loss value and the target return loss value is smaller than the preset threshold value. This may enable adjustment of the second power.

Referring to fig. 7, in some embodiments, adjusting the parameter includes adjusting the power, and step S18 includes:

step S181: and taking the sum of the adjusted power and the second power before updating as the updated second power.

In some embodiments, adjusting the parameter includes adjusting the power, and the controller 120 is configured to use a sum of the adjusted power and the second power before the update as the updated second power.

Thus, the second power before updating is added with the adjusting power, so that the second power can be updated uniformly from low to high.

In one example, the identification frequency point is 2.45GHz, the preset threshold is 1%, and the adjustment power is 3dB, that is, the step length is 3 dB. The microwave source 110 is controlled to scan at 2.45GHz at a first power to determine a target return loss value.

The initial second power is-20 dB, the microwave source 110 is controlled to scan at 2.45GHz by-20 dB to determine the current return loss value, and if the difference between the current return loss value corresponding to-20 dB and the target return loss value is greater than or equal to 1%, the-20 dB is added by 3dB to obtain the updated second power of-17 dB.

And controlling the microwave source 110 to scan at 2.45GHz by-17 dB to determine the current return loss value, wherein if the difference between the current return loss value corresponding to-17 dB and the target return loss value is greater than or equal to 1%, adding 3dB to-17 dB to obtain the updated second power of-14 dB.

And controlling the microwave source 110 to scan at 2.45GHz by-14 dB to determine a current return loss value, and controlling the microwave source 110 to scan at-14 dB in a full frequency band at a scanning frequency band if the difference between the current return loss value corresponding to-14 dB and the target return loss value is less than 1%, so as to determine return loss information, and controlling the microwave device 100 to operate according to the return loss information.

Note that the unit dB is used to characterize the relative value. In the above example, the unit dB may be used to characterize the relative value to the maximum output power of the microwave source 110. Namely: dB ═ 10lg (second power w/maximum output power w of microwave source 110). In other examples, the unit dB may also be used to characterize the relative value of the second power before and after the update. Namely: dB ═ 10lg (second power w after update/second power w before update). It will be appreciated that in other embodiments, the power may also be measured in units of w. And are not limited herein.

It is understood that in some other examples, adjusting the parameter may include adjusting the scale, and step S18 may include: and taking the product of the adjusted proportion and the second power before updating as the updated second power. In this way, updating of the second power can also be achieved.

In still other examples, the adjustment parameter may include an adjustment formula, and step S18 may include: and substituting the second power before updating into an adjusting formula to determine the second power after updating. In this way, updating of the second power can also be achieved.

The specific manner of updating the second power is not limited herein.

Referring to fig. 8, in some embodiments, the control method includes:

step S132: when the second power is greater than the third power, controlling the microwave source 110 to perform full-band scanning in a scanning frequency band at the third power to determine return loss information;

when the second power is less than or equal to a preset third power, the step S14 is entered, and the third power is less than the first power;

in some embodiments, the controller 120 is configured to, in a case that the second power is less than or equal to a preset third power, enter a step of controlling the microwave source 110 to scan at the identified frequency point with the second power to determine a current return loss value, where the third power is less than the first power; and is used for controlling the microwave source 110 to perform full-band scanning in the scanning frequency band at the third power to determine the return loss information when the second power is greater than the third power.

Therefore, the second power can be prevented from being overlarge, so that the influence of the scanning process on the heating process is avoided. It can be understood that, after the second power is updated according to the adjustment parameter, the second power may be too large and larger than the third power, at this time, even if the difference between the current return loss value and the target return loss value corresponding to the updated second power is smaller than the preset threshold, the microwave source 110 cannot be controlled to perform full-band scanning in the scanning frequency band with the second power, otherwise, the influence of the scanning process on the heating process is easily caused, and the heating effect of the microwave device 100 is affected accordingly. Therefore, in the present embodiment, the third power is set to avoid that the heating process is greatly affected by the scanning process caused by the excessive second power, so that the reliability of the microwave apparatus 100 can be improved, and the heating effect of the microwave apparatus 100 can be ensured.

Specifically, the numerical range of the third power is: greater than or equal to-5 dB and less than or equal to-1 dB.

In this embodiment, the third power is-3 dB. In other embodiments, the third power may be-5 dB, -4dB, -2dB, -1dB or other values within the above range. The specific value of the third power is not limited herein.

In addition, it is understood that the control method may include: step S131: it is determined whether the second power is less than or equal to a preset third power. As shown in fig. 8.

In one example, the third power is-3 dB, the identification frequency point is 2.45GHz, the preset threshold is 1%, and the adjustment power is 3dB, that is, the step length is 3 dB. The microwave source 110 is controlled to scan at 2.45GHz at a first power to determine a target return loss value.

The initial second power is-5 dB and less than-3 dB, the microwave source 110 is controlled to scan at 2.45GHz by-5 dB to determine the current return loss value, and if the difference between the current return loss value corresponding to-5 dB and the target return loss value is greater than or equal to 1%, the-5 dB is added by 3dB to obtain the updated second power of-2 dB.

And the updated second power is-2 dB and is greater than the third power by-3 dB, the microwave source 110 is controlled to perform full-band scanning at the scanning frequency band by-3 dB to determine return loss information, and the microwave device 100 is controlled to operate according to the return loss information.

Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of the control method of any of the above embodiments.

For example, in the case where the program is executed by a processor, the following are implemented: step S11: determining an identification frequency point from a preset scanning frequency band; step S12: in the heating process of the microwave device 100, controlling the microwave source 110 to scan at the identification frequency point with a first power to determine a target return loss value; step S14: controlling the microwave source 110 to scan at the identified frequency point with a second power to determine a current return loss value, wherein the second power is smaller than the first power; step S16: under the condition that the difference between the current return loss value and the target return loss value is smaller than a preset threshold value, controlling the microwave source 110 to perform full-band scanning in a scanning frequency band at a second power so as to determine return loss information; step S19: the operation of the microwave device 100 is controlled according to the return loss information.

The computer-readable storage medium of the embodiment of the present invention scans the identification frequency point in the scanning frequency band with a larger first power to determine the target return loss value, and then scans the identification frequency point with a smaller second power to determine the current return loss value, and performs full-band scanning in the scanning frequency band with the second power to determine the return loss information under the condition that the difference between the current return loss value and the target return loss value is smaller than the preset threshold, so as to improve the accuracy of the return loss information and make the scanning power smaller, thereby making the control of the microwave device 100 according to the return loss information more accurate, and reducing the influence of the scanning on the heating process.

The computer readable storage medium may be disposed in the microwave device 100, or may be disposed in a cloud server, and the microwave device 100 may communicate with the cloud server to obtain the corresponding program.

It will be appreciated that the computer program comprises computer program code. The computer program code may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying computer program code, recording medium, U-disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), software distribution medium, and the like.

The controller 104 of the microwave device 100 is a single chip integrated with a processor, a memory, a communication module, and the like. The processor may refer to a processor included in the controller 104. The Processor 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.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processing module-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

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

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

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

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art within the scope of the present invention.