Control method and device of radio frequency equipment and radio frequency equipment

Abstract

This application provides a control method, apparatus, storage medium, and radio frequency (RF) device. The RF device includes an RF power amplification circuit and a tuning circuit. The RF power amplification circuit outputs RF power to the tuning circuit. The tuning circuit includes at least one energy storage element for impedance matching. The on / off state of each energy storage element is controlled by a corresponding relay switch. The method includes: in response to an impedance matching command, reducing the input voltage of the RF power amplification circuit to a set voltage; and performing impedance matching by adjusting the on / off state of each relay switch at the set voltage. The technical solution of this application can improve the reliability of using RF devices and extend their service life.

Description

Technical Field

[0001] This application relates to the field of radio frequency technology, and more specifically, to a control method, apparatus, storage medium, and radio frequency device for a radio frequency device. Background Technology

[0002] Currently, in the control process of radio frequency (RF) equipment, especially when the RF equipment is executing impedance matching commands, the components in the impedance matching circuit (such as relays, capacitors, inductors, etc.) are usually easily damaged and consumable. It is understandable that when these components are damaged, the RF equipment will not be able to effectively perform the impedance matching function, thereby reducing the reliability and service life of the RF equipment. Based on this, how to improve the reliability of RF equipment during use and thus extend its service life is an urgent technical problem to be solved. Summary of the Invention

[0003] The embodiments of this application provide a control method, apparatus, storage medium, and radio frequency device for a radio frequency device, which can improve the reliability of the radio frequency device to a certain extent and thus extend the service life of the radio frequency device.

[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0005] According to a first aspect of the present application, a control method for a radio frequency (RF) device is provided. The RF device includes an RF power amplification circuit and a tuning circuit. The RF power amplification circuit is used to output RF power to the tuning circuit. The tuning circuit includes at least one energy storage element for impedance matching. The at least one energy storage element is used for impedance matching. The on / off state of each energy storage element is controlled by a corresponding relay switch. The method includes: in response to an impedance matching command, reducing the input voltage of the RF power amplification circuit to a set voltage; and performing impedance matching by adjusting the on / off state of each relay switch at the set voltage.

[0006] In some embodiments of this application, based on the foregoing scheme, the impedance matching by adjusting the opening and closing states of each relay switch includes: adjusting the opening and closing states of each relay switch and obtaining the power value output by the RF power amplifier circuit as the forward power value, and obtaining the power value output by the tuning circuit as the reverse power value; determining whether impedance matching is completed based on the forward power value and the reverse power value; if impedance matching is not completed, returning to the steps of adjusting the opening and closing states of each relay switch and obtaining the power value output by the RF power amplifier circuit, until impedance matching is completed.

[0007] In some embodiments of this application, based on the foregoing scheme, adjusting the opening and closing state of each relay switch includes: obtaining the priority of each relay switch combination in a preset manner; determining the relay switch combination with the highest priority from the relay switch combinations that have not been determined in the current impedance matching cycle, as the target relay switch combination; opening the relay switches belonging to the target relay switch combination, and closing the relay switches that do not belong to the target combination.

[0008] In some embodiments of this application, based on the foregoing scheme, if there are at least two of the highest priority relay switch combinations, the method further includes: determining the number of times each of the highest priority relay switch combinations has been determined historically; and determining the highest priority relay switch combination with the fewest determinations as the target relay switch combination.

[0009] In some embodiments of this application, based on the foregoing scheme, adjusting the opening and closing states of each relay switch and obtaining the power value output by the radio frequency power amplification circuit includes: turning off the output power of the radio frequency power amplification circuit; adjusting the opening and closing states of each relay switch after a first preset time; turning on the output power of the radio frequency power amplification circuit after a second preset time; and obtaining the power value output by the radio frequency power amplification circuit after a third preset time.

[0010] In some embodiments of this application, based on the foregoing scheme, determining whether impedance matching is completed based on the forward power value and the reverse power value includes: calculating the reflection coefficient based on the forward power value and the reverse power value, wherein the reflection coefficient is used to characterize the power consumption level of the RF power amplifier circuit; if the reflection coefficient is greater than or equal to the reflection coefficient threshold, then impedance matching is not completed.

[0011] In some embodiments of this application, based on the foregoing scheme, calculating the reflection coefficient based on the forward power value and the reverse power value includes: calculating the ratio between the reflected power value and the forward power value; and determining the ratio as the reflection coefficient.

[0012] In some embodiments of this application, the method is applied to a radio frequency defrosting device based on the foregoing scheme.

[0013] According to a second aspect of the embodiments of this application, a control device for a radio frequency (RF) device is provided. The RF device includes an RF power amplification circuit and a tuning circuit. The RF power amplification circuit is used to output RF power to the tuning circuit. The tuning circuit includes at least one energy storage element, which is used for impedance matching. The on / off state of each energy storage element is controlled by a corresponding relay switch. The device includes: a reduction unit, used to reduce the input voltage of the RF power amplification circuit to a set voltage in response to an impedance matching command; and a matching unit, used to perform impedance matching by adjusting the on / off state of each relay switch under the set voltage.

[0014] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, characterized in that the computer-readable storage medium stores at least one piece of program code, the at least one piece of program code being loaded and executed by a processor to perform the operations performed by the method described in any of the first aspects above.

[0015] According to a fourth aspect of the embodiments of this application, a radio frequency device is provided, including one or more processors and one or more memories, wherein the one or more memories store at least one piece of program code, the at least one piece of program code being loaded and executed by the one or more processors to perform the operations performed by the method described in any of the first aspects above.

[0016] In the technical solution provided in this application, the radio frequency (RF) device includes an RF power amplification circuit that outputs RF power to a tuning circuit, and a tuning circuit including at least one energy storage element. The energy storage element is used for impedance matching, and the on / off state of each energy storage element is controlled by a corresponding relay switch. When the RF device receives an impedance matching command, it reduces the input voltage of the RF power amplification circuit to a set voltage. Then, at the set voltage, it performs impedance matching by adjusting the on / off state of each relay switch. Therefore, by reducing the input voltage of the RF power amplification circuit during the execution of the impedance matching command, the RF device can effectively reduce the impact of the input voltage on the relay switches during the on / off process, and also reduce the impact on the energy storage element in the impedance matching circuit. This reduces the losses of the relays, energy storage elements, etc., in the tuning circuit of the RF device, thereby improving the reliability of the RF device and extending its service life.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0019] Figure 1 A schematic diagram of a radio frequency defrosting device according to an embodiment of this application is shown;

[0020] Figure 2 A flowchart of a control method for a radio frequency device according to an embodiment of this application is shown;

[0021] Figure 3 A circuit diagram of a tuning circuit according to an embodiment of this application is shown;

[0022] Figure 4 A detailed flowchart illustrating impedance matching by adjusting the on / off states of various relay switches according to one embodiment of this application is shown.

[0023] Figure 5 A detailed flowchart illustrating the adjustment of the opening and closing states of various relay switches according to one embodiment of this application is shown;

[0024] Figure 6 A detailed flowchart illustrating the adjustment of the opening and closing states of various relay switches and the acquisition of the power value output by the radio frequency power amplifier circuit according to one embodiment of this application is shown.

[0025] Figure 7 A timing diagram is shown illustrating the adjustment of the opening and closing states of various relay switches and the acquisition of the power value output by the radio frequency power amplifier circuit according to one embodiment of this application.

[0026] Figure 8 An overall flowchart of a control method for a radio frequency device according to an embodiment of this application is shown;

[0027] Figure 9 A block diagram of a control device for a radio frequency device according to an embodiment of this application is shown;

[0028] Figure 10 A schematic diagram of the structure of a computer system suitable for implementing the radio frequency device of the present application is shown. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0030] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0031] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0032] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0033] It should be noted that "multiple" in this article refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0036] The following detailed description of some embodiments of this application will be provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] The radio frequency (RF) device proposed in this application includes an RF power amplification circuit and a tuning circuit. The RF power amplification circuit is used to output RF power to the tuning circuit. The tuning circuit includes at least one energy storage element for impedance matching. The on / off state of each energy storage element is controlled by a corresponding relay switch. 。

[0038] It should be noted that the energy storage element can be a capacitor, an inductor, a chemical battery, etc., and this application does not limit the specific components.

[0039] The radio frequency (RF) device proposed in this application refers to a device with RF functionality, such as a refrigerator with RF defrosting functionality. It is understood that, correspondingly, the control method for the RF device proposed in this application can be applied to RF defrosting equipment.

[0040] To enable those skilled in the art to better understand the implementation of the radio frequency device of this application as a radio frequency defrosting device, the following will be combined with Figure 1 Please provide an explanation.

[0041] See Figure 1 The diagram shows a schematic structural diagram of a radio frequency defrosting device according to an embodiment of the present application.

[0042] like Figure 1 The diagram illustrates a possible radio frequency (RF) defrosting device, comprising a hardware system and a control system. The hardware system includes an adjustable power supply for powering the entire RF defrosting device and enabling output voltage regulation; an RF power amplification circuit for outputting RF power to a tuning circuit and providing RF defrosting energy to the food during the defrosting process; a tuning circuit for compensating for load impedance mismatch caused by changes in the food's state; and a food and cavity for accommodating the food to be defrosted.

[0043] like Figure 1The control system of the radio frequency defrosting device shown includes: power closed-loop control, which samples the forward and reverse power signals and outputs control signals to the adjustable power supply and radio frequency power amplification circuit to achieve precise output power closed-loop control; automatic matching control, which automatically acquires the forward and reverse power signals to automatically send impedance matching commands to the tuning circuit when impedance mismatch occurs; defrosting process control, which controls the output power curve and output time according to the needs of food identification and the defrosting process; and food identification, which judges and identifies the type of food and determines its basic information (such as quality, temperature, etc.).

[0044] It should be noted that the radio frequency device and the control method for the radio frequency device proposed in this application can be applied not only to the field of food thawing, but also to other fields, such as medical and beauty. The specific application field is not limited here.

[0045] See Figure 2 The diagram shows a flowchart of a control method for a radio frequency device according to an embodiment of the present application, which specifically includes steps 110 to 112.

[0046] Step 110: In response to the impedance matching command, reduce the input voltage of the RF power amplifier circuit to a set voltage.

[0047] In some implementations, the input voltage can be controlled to decrease to a set voltage at a certain slope. Alternatively, the input voltage can be controlled to decrease to a set voltage according to a certain curve or broken line. This application does not limit the specific implementation. It is understood that if the radio frequency device is a radio frequency defrosting device, then it can be controlled to decrease to a set voltage by means of... Figure 1 The adjustable power supply shown reduces the input voltage to the set voltage.

[0048] In this embodiment, by reducing the input voltage to a set voltage, a low-voltage execution condition is created for impedance matching in the subsequent tuning circuit. This effectively avoids high-voltage impacts on various components in the tuning circuit, thereby improving the service life of these components and the overall service life of the radio frequency equipment.

[0049] Step 120: Under the set voltage, impedance matching is performed by adjusting the opening and closing states of each relay switch.

[0050] It is understandable that when impedance mismatch occurs in the tuning circuit, an impedance matching command will be executed to maximize the utilization of the RF power output by the RF amplifier circuit.

[0051] The following will combine Figure 3 A specific implementation of the tuning circuit is described to enable those skilled in the art to better understand this embodiment.

[0052] See Figure 3 The diagram shows a circuit diagram of a tuning circuit according to an embodiment of this application.

[0053] like Figure 3 The diagram shows a possible tuning matching loop circuit, which includes a series energy storage element 1, a parallel energy storage element 2, an inductor 3, and a capacitor 4. In one embodiment, three sets of capacitors can be configured in the series energy storage element 1 and five sets of capacitors can be configured in the parallel energy storage element. Of course, the specific types and quantities of energy storage elements included in the series energy storage element 1 and the parallel energy storage element 2 can also be designed according to the specific scenario, which is not limited in this application.

[0054] In this embodiment, when the impedance of capacitor 4 changes (i.e., when the state of the food in the food chamber changes), an impedance mismatch will occur in the tuning circuit. In this case, it can be resolved by adjusting, for example... Figure 3 The opening and closing states of each relay switch shown are used for impedance matching, that is, adjusting the opening and closing states of different energy storage elements in series energy storage element 1 and / or parallel energy storage element 2 to compensate for impedance mismatch, so that the RF power output by the RF amplifier circuit can be maximized.

[0055] In some embodiments, the specific implementation of impedance matching by adjusting the opening and closing states of each relay switch can be as follows: Figure 4 Perform the steps shown.

[0056] See Figure 4 The diagram shows a detailed flowchart of impedance matching by adjusting the opening and closing states of various relay switches according to an embodiment of the present application, specifically including steps 121 to 123.

[0057] Step 121: Adjust the opening and closing state of each relay switch, and obtain the power value output by the RF power amplifier circuit as the positive power value, and obtain the power value output by the tuning circuit as the reverse power value.

[0058] It should be noted that the RF power output from an RF power amplifier circuit generally involves power loss, efficient power utilization, and power being transmitted back to the RF power amplifier circuit. Understandably, the lower the values ​​of power loss and power being transmitted back to the RF power amplifier circuit, the higher the utilization rate of the RF power.

[0059] It should also be noted that the power value output by the tuning circuit represents a portion of the RF power output from the RF power amplifier circuit that is not effectively utilized, but is reflected back to the RF power amplifier circuit by the tuning circuit. Therefore, this portion of the RF power value can be obtained as the power value output by the tuning circuit.

[0060] Step 122: Based on the forward power value and the reverse power value, determine whether impedance matching has been completed.

[0061] In some implementations, a preset reverse power threshold can be used. When the obtained reverse power value is lower than the reverse power threshold, impedance matching is considered to be complete.

[0062] In some implementations, impedance matching can be considered complete when a preset power difference threshold is set and the difference between the forward and reverse power values ​​is greater than the power difference threshold.

[0063] In some implementations, impedance matching can be determined as follows:

[0064] First, based on the forward power value and the reverse power value, the reflection coefficient is calculated. The reflection coefficient is used to characterize the power consumption level of the RF power amplifier circuit. Second, if the reflection coefficient is greater than or equal to the reflection coefficient threshold, impedance matching is not completed. If the reflection coefficient is less than the reflection coefficient threshold, impedance matching is considered to be completed.

[0065] The reflection coefficient can be determined by calculating the ratio between the reflected power value and the forward power value; the ratio is then used as the reflection coefficient; the reflection coefficient can also be determined by calculating the logarithm of the ratio between the reflected power value and the forward power value, i.e., S11(dB) = 10lg(reflected power value / forward power value), and the logarithm S11 is used as the reflection coefficient.

[0066] In this embodiment, different implementation methods for determining whether impedance matching is complete can be designed according to different application scenarios, and this application does not limit them.

[0067] See also Figure 4 Step 123: If impedance matching is not completed, return to the step of adjusting the opening and closing state of each relay switch and obtaining the power value output by the RF power amplifier circuit until impedance matching is completed.

[0068] It is understandable that the process of executing impedance matching commands in the tuning circuit is a cyclical process. That is, within one cycle, impedance matching is performed by adjusting the opening and closing states of each relay switch. The success of impedance matching is determined by the forward and reverse power values. If impedance matching is successful, the impedance matching command is terminated; otherwise, the process continues in the next cycle.

[0069] In some embodiments, the specific implementation of adjusting the opening and closing states of each relay switch can be as follows: Figure 5 Perform the steps shown.

[0070] See Figure 5 The diagram shows a detailed flowchart of adjusting the opening and closing states of various relay switches according to an embodiment of the present application, specifically including steps 1211 to 1213.

[0071] Step 1211: Obtain the preset priority of each relay switch combination.

[0072] It is understandable that the higher the priority of the relay switch combination, the more efficient it is to complete the impedance matching command.

[0073] For example, such as Figure 3 The capacitors in the series energy storage element 1 (e.g., containing 3 sets of capacitors) and the parallel energy storage element 2 (e.g., containing 5 sets of capacitors) shown can be connected in series or parallel with the tuning circuit in different combinations by adjusting the opening and closing states of each relay switch, thereby compensating for the load and achieving impedance matching. It can be understood that each relay switch combination corresponds to a different reverse power value. In some embodiments, the priority of each relay switch combination can be set according to its corresponding reverse power value; that is, the lower the reverse power of a relay switch combination, the higher its priority.

[0074] Step 1212: Determine the highest priority relay switch combination from the relay switch combinations that have not been determined in the current impedance matching cycle, and use it as the target relay switch combination.

[0075] Step 1213: Open the relay switches belonging to the target relay switch combination and close the relay switches not belonging to the target combination.

[0076] It should be noted that opening a relay switch belonging to the target relay switch combination means that the energy storage element corresponding to that relay will be connected to the tuning circuit in series or parallel to achieve impedance matching. Closing a relay switch not belonging to the target combination means that the energy storage element corresponding to that relay will not be connected to the tuning circuit.

[0077] In this embodiment, by setting the priority of the relay switch combination during an impedance matching process, and by executing the opening and closing action of the relay switch combination with the highest priority first in an impedance matching cycle, the execution efficiency of impedance matching can be improved.

[0078] In some implementations, if there are at least two of the highest priority relay switch combinations, the opening and closing states of each relay switch can be adjusted by following steps 1 to 2.

[0079] Step 1: Determine the number of times each of the highest priority relay switch combinations has been identified historically.

[0080] Step 2: Determine the relay switch combination with the lowest frequency and highest priority as the target relay switch combination.

[0081] In this embodiment, when two or more highest priority relay switch combinations are obtained, by selecting the relay switch combination that has been used the least in history as the target relay switch combination, the repeated use of the same set of relay switch combinations can be avoided, thereby reducing the loss burden of the set of relay switch combinations and enhancing the reliability of the tuning circuit to a certain extent, and improving the service life of the radio frequency equipment.

[0082] In some implementations, such as Figure 4 In step 121 shown, adjusting the opening and closing states of each relay switch and obtaining the power value output by the RF power amplifier circuit can be implemented according to... Figure 6 implement.

[0083] See Figure 6 The diagram illustrates a detailed flowchart of adjusting the opening and closing states of various relay switches and obtaining the power value output by the radio frequency power amplifier circuit according to an embodiment of the present application, specifically including steps 1214 to 1217.

[0084] Step 1214: Turn off the output power of the radio frequency power amplifier circuit.

[0085] In this embodiment, by shutting down the output power of the RF power amplifier circuit, the relay switch can be ensured to perform opening and closing actions in a zero-power state. This effectively avoids the impact of RF power on components in the tuning circuit, including capacitors, inductors, relays, etc., and to a certain extent improves the stability of the tuning circuit and extends the service life of the RF equipment.

[0086] Step 1215: After the first preset time, adjust the opening and closing state of each relay switch.

[0087] It should be noted that turning off the output power of the RF power amplifier circuit does not immediately reduce the RF power in the tuning circuit to zero power. Therefore, in this embodiment, by delaying the first preset time before adjusting the opening and closing state of the relay switch, it is more likely to ensure that the relay performs the opening and closing action in a zero power state.

[0088] Step 1216: After the second preset time, turn on the output power of the radio frequency power amplifier circuit.

[0089] It should be noted that there is a certain amount of jitter time during the opening and closing action of the relay switch. Therefore, in this embodiment, by delaying the second preset time before activating the output power of the radio frequency power amplifier circuit, the effectiveness of the relay switch in performing the opening and closing action can be ensured.

[0090] Step 1217: After a third preset time, obtain the power value output by the radio frequency power amplification circuit.

[0091] It should be noted that while acquiring the power value output by the RF power amplification circuit (i.e., the forward power value), the power value output by the tuning circuit (i.e., the reverse power value) is also acquired. In some embodiments, this can be achieved through methods such as... Figure 1 The automatic matching control module shown is used to acquire the power value output by the RF power amplifier circuit and the power value output by the tuning circuit.

[0092] To enable those skilled in the art to better understand this embodiment, the following will be combined with Figure 7 Please provide an explanation.

[0093] See Figure 7 A timing diagram is shown illustrating the adjustment of the opening and closing states of various relay switches and the acquisition of the power value output by the radio frequency power amplifier circuit according to one embodiment of this application.

[0094] like Figure 7 The settings shown are: first preset time t1, second preset time t2, and third preset time t3. This can be achieved from... Figure 7 The image clearly shows that the relay switch is in one cycle when it performs one opening and closing action.

[0095] Upon receiving the impedance matching command, the input voltage is first reduced to the set voltage. After the input voltage stabilizes at the set voltage, the output power of the RF power amplifier circuit is turned off. After time t1, the on / off state of each relay switch is adjusted. After time t2, the output power of the RF power amplifier circuit is turned on. After time t3, the output power of the RF power amplifier circuit and the output power of the tuning circuit are acquired. The impedance matching is then determined based on the acquired power. If it is not completed, the cycle continues. If the impedance matching is completed, the input voltage is raised to the initial value, and the impedance matching command is exited.

[0096] To enable those skilled in the art to better understand the specific implementation methods of the technical solutions in this application, the following will be combined with... Figure 8 The overall process of the technical solution in this application is explained.

[0097] See Figure 8 The diagram shows an overall flowchart of a control method for a radio frequency device according to an embodiment of the present application, specifically including steps 801 to 807.

[0098] Step 801: In response to the impedance matching command, initiate impedance matching;

[0099] Step 802: Reduce the input voltage of the RF power amplifier circuit to a set voltage;

[0100] Step 803: Turn off the output power of the RF power amplifier circuit;

[0101] Step 804: After the first preset time, adjust the opening and closing state of each relay switch;

[0102] Step 805: After the second preset time, turn on the output power of the radio frequency power amplifier circuit;

[0103] Step 806: After the third preset time, obtain the power value output by the RF power amplifier circuit and the power value output by the tuning circuit; and determine whether impedance matching has been completed.

[0104] If impedance matching is not completed, return to step 803 until impedance matching is completed;

[0105] If impedance matching is completed, proceed to step 807 to exit impedance matching.

[0106] In some embodiments of this application, the RF device includes an RF power amplifier circuit that outputs RF power to a tuning circuit, and a tuning circuit including at least one energy storage element. The energy storage element is used for impedance matching, and the on / off state of each energy storage element is controlled by a corresponding relay switch. When the RF device receives an impedance matching command, it reduces the input voltage of the RF power amplifier circuit to a set voltage. Then, at the set voltage, it performs impedance matching by adjusting the on / off state of each relay switch. Therefore, by reducing the input voltage of the RF power amplifier circuit during the execution of the impedance matching command, the RF device can effectively reduce the impact of the input voltage on the relay switches during the on / off process, and also reduce the impact on the energy storage element in the impedance matching circuit. This reduces the losses of relays, energy storage elements, etc., in the tuning circuit of the RF device, thereby improving the reliability of the RF device and extending its service life.

[0107] The following describes an apparatus embodiment of this application, which can be used to execute the control method for the radio frequency device in the above embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the control method for the radio frequency device described above.

[0108] Figure 9 A block diagram of a control device for a radio frequency device according to an embodiment of this application is shown.

[0109] Reference Figure 9 As shown, a control device 900 for a radio frequency device according to an embodiment of this application includes: a downsampling unit 901 and a matching unit 902.

[0110] The control device for the radio frequency equipment includes a radio frequency power amplification circuit and a tuning circuit. The radio frequency power amplification circuit is used to output radio frequency power to the tuning circuit. The tuning circuit includes at least one energy storage element, which is used for impedance matching. The on / off state of each energy storage element is controlled by a corresponding relay switch. The device includes: a reduction unit 901, used to reduce the input voltage of the radio frequency power amplification circuit to a set voltage in response to an impedance matching command; and a matching unit 902, used to perform impedance matching by adjusting the on / off state of each relay switch under the set voltage.

[0111] In some embodiments of this application, based on the foregoing scheme, the matching unit 902 further includes: adjusting the opening and closing states of each relay switch, and obtaining the power value output by the RF power amplifier circuit as the forward power value, and obtaining the power value output by the tuning circuit as the reverse power value; determining whether impedance matching is completed based on the forward power value and the reverse power value; if impedance matching is not completed, returning to the steps of adjusting the opening and closing states of each relay switch and obtaining the power value output by the RF power amplifier circuit, until impedance matching is completed.

[0112] In some embodiments of this application, based on the foregoing scheme, the matching unit 902 further includes: obtaining the priority of each relay switch combination in a preset manner; determining the relay switch combination with the highest priority from the relay switch combinations that have not been determined in the current impedance matching cycle, as the target relay switch combination; opening the relay switch belonging to the target relay switch combination, and closing the relay switch that does not belong to the target combination.

[0113] In some embodiments of this application, based on the foregoing scheme, the matching unit 902 further includes: if there are at least two of the highest priority relay switch combinations, determining the number of times each of the highest priority relay switch combinations has been determined in history; and determining the highest priority relay switch combination with the fewest determinations as the target relay switch combination.

[0114] In some embodiments of this application, based on the foregoing scheme, the matching unit 902 further includes: turning off the output power of the radio frequency power amplification circuit; adjusting the opening and closing state of each relay switch after a first preset time; turning on the output power of the radio frequency power amplification circuit after a second preset time; and acquiring the power value output by the radio frequency power amplification circuit after a third preset time.

[0115] In some embodiments of this application, based on the foregoing scheme, the matching unit 902 further includes: calculating a reflection coefficient based on the forward power value and the reverse power value, wherein the reflection coefficient is used to characterize the power consumption level of the RF power amplifier circuit; if the reflection coefficient is greater than or equal to a reflection coefficient threshold, then impedance matching is not completed.

[0116] In some embodiments of this application, based on the foregoing scheme, the matching unit 902 further includes: calculating the ratio between the reflected power value and the forward power value; and determining the ratio as the reflection coefficient.

[0117] In some embodiments of this application, based on the foregoing scheme, the matching unit 902 further includes: the method is applied to a radio frequency defrosting device.

[0118] Figure 10 A schematic diagram of the structure of a computer system suitable for implementing the radio frequency device of the present application is shown.

[0119] It should be noted that, Figure 10 The computer system 1000 of the radio frequency device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0120] like Figure 10 As shown, the computer system 1000 includes a Central Processing Unit (CPU) 1001, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 1002 or programs loaded from storage portion 1008 into Random Access Memory (RAM) 1003, such as performing the methods described in the above embodiments. The RAM 1003 also stores various programs and data required for system operation. The CPU 801, ROM 1002, and RAM 1003 are interconnected via a bus 1004. An Input / Output (I / O) interface 1005 is also connected to the bus 1004.

[0121] The following components are connected to I / O interface 1005: an input section 1006 including a keyboard, mouse, etc.; an output section 1007 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 1008 including a hard disk, etc.; and a communication section 1009 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 1009 performs communication processing via a network such as the Internet. A drive 1010 is also connected to I / O interface 1005 as needed. Removable media 1011, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 1010 as needed so that computer programs read from them can be installed into storage section 1008 as needed.

[0122] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 1009, and / or installed from removable medium 1011. When the computer program is executed by central processing unit (CPU) 1001, it performs various functions defined in the system of this application.

[0123] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such transmitted data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0124] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0125] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0126] In another aspect, this application also provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the control method for the radio frequency device described in the above embodiments.

[0127] In another aspect, this application also provides a computer-readable medium, which may be included in the radio frequency device described in the above embodiments; or it may exist independently and not assembled into the radio frequency device. The computer-readable medium carries one or more programs, which, when executed by the radio frequency device, cause the radio frequency device to implement the control method of the radio frequency device described in the above embodiments.

[0128] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0129] Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, touch terminal, or network device, etc.) to execute the method according to the embodiments of this application.

[0130] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0131] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A control method for a radio frequency device, characterized in that, The radio frequency device includes a radio frequency power amplification circuit and a tuning circuit. The radio frequency power amplification circuit is used to output radio frequency power to the tuning circuit. The tuning circuit includes at least one energy storage element, which is used for impedance matching. The on / off state of each energy storage element is controlled by a corresponding relay switch. The method includes: In response to an impedance matching command, the input voltage of the RF power amplifier circuit is reduced to a set voltage; Under the set voltage, impedance matching is achieved by adjusting the opening and closing states of each relay switch; The impedance matching by adjusting the opening and closing states of each relay switch includes: Adjust the opening and closing state of each relay switch, and obtain the power value output by the radio frequency power amplification circuit as the positive power value, and obtain the power value output by the tuning circuit as the reverse power value; Based on the forward power value and the reverse power value, determine whether impedance matching has been completed; If impedance matching is not completed, return to the steps of adjusting the opening and closing states of each relay switch and obtaining the power value output by the RF power amplifier circuit until impedance matching is completed. The adjustment of the opening and closing states of each relay switch includes: Obtain the preset priority of each relay switch combination; set its priority according to the reverse power value corresponding to each group of relay switches. The highest priority relay switch combination is determined from the relay switch combinations that are not determined in the current impedance matching cycle, and is used as the target relay switch combination. Open the relay switches that belong to the target relay switch combination, and close the relay switches that do not belong to the target relay switch combination; If at least two of the highest priority relay switch combinations exist, the method further includes: Determine the number of times each of the highest priority relay switch combinations has been identified historically; The relay switch combination with the lowest frequency is determined as the target relay switch combination.

2. The method according to claim 1, characterized in that, The adjustment of the opening and closing states of each relay switch and the acquisition of the power value output by the RF power amplification circuit include: Turn off the output power of the radio frequency power amplifier circuit; After the first preset time, adjust the opening and closing state of each relay switch; After a second preset time, the output power of the radio frequency power amplifier circuit is turned on; After a third preset time, the power value output by the radio frequency power amplification circuit is obtained.

3. The method according to claim 1, characterized in that, The step of determining whether impedance matching is complete based on the forward power value and the reverse power value includes: Based on the forward power value and the reverse power value, the reflection coefficient is calculated, which is used to characterize the power consumption of the RF power amplifier circuit. If the reflection coefficient is greater than or equal to the reflection coefficient threshold, impedance matching is not complete.

4. The method according to claim 3, characterized in that, The calculation of the reflection coefficient based on the forward power value and the reverse power value includes: Calculate the ratio between the reverse power value and the forward power value; The ratio is determined as the reflection coefficient.

5. The method according to any one of claims 1 to 4, characterized in that, The method is applied to radio frequency defrosting equipment.

6. A control device for a radio frequency device, characterized in that, The radio frequency device includes a radio frequency power amplification circuit and a tuning circuit. The radio frequency power amplification circuit is used to output radio frequency power to the tuning circuit. The tuning circuit includes at least one energy storage element, which is used for impedance matching. The on / off state of each energy storage element is controlled by a corresponding relay switch. The device includes: A reduction unit is used to reduce the input voltage of the RF power amplifier circuit to a set voltage in response to an impedance matching command; A matching unit is used to perform impedance matching by adjusting the opening and closing states of each relay switch under the set voltage. The matching unit is also used to adjust the opening and closing state of each relay switch, and to obtain the power value output by the radio frequency power amplification circuit as the positive power value, and to obtain the power value output by the tuning circuit as the reverse power value. Based on the forward power value and the reverse power value, determine whether impedance matching has been completed; If impedance matching is not completed, return to the steps of adjusting the opening and closing states of each relay switch and obtaining the power value output by the RF power amplifier circuit until impedance matching is completed. Obtain the preset priority of each relay switch combination; set its priority according to the reverse power value corresponding to each group of relay switches. The highest priority relay switch combination is determined from the relay switch combinations that are not determined in the current impedance matching cycle, and is used as the target relay switch combination. Open the relay switches that belong to the target relay switch combination, and close the relay switches that do not belong to the target relay switch combination; If there are at least two of the highest priority relay switch combinations, determine the number of times each of the highest priority relay switch combinations has been determined in history; The relay switch combination with the lowest frequency is determined as the target relay switch combination.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one piece of program code, which is loaded and executed by a processor to perform the operations performed by the method as described in any one of claims 1 to 5.

8. A radio frequency device, characterized in that, It includes a memory and one or more programs, wherein one or more programs are stored in the memory and configured to be executed by one or more processors, wherein the one or more programs contain instructions for performing the method as described in any one of claims 1 to 5.

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