Capacitance monitoring method, device, equipment and medium

Abstract

The present application provides a capacitance monitoring method, device, equipment and medium, and the capacitance monitoring method is used to monitor the capacitance state of an adjustable capacitor. The capacitance monitoring method includes: constructing a charge and discharge circuit of an adjustable capacitor and a test resistor; controlling and adjusting the capacitance value of the adjustable capacitor, and controlling the charge and discharge circuit to alternately be in a charging state and a discharging state with a preset duration as the charge and discharge cycle; obtaining the monitoring voltage value of the charge and discharge circuit at intervals, and determining the multiple monitoring capacitance values ​​of the adjustable capacitor in sequence according to at least the resistance value of the test resistor, the preset duration and two adjacent monitoring voltage values; determining the capacitance state of the adjustable capacitor as a non-extreme state or an extreme state according to the relationship between each monitoring capacitance value of the adjustable capacitor and the nominal range; when determining that the capacitance state of the adjustable capacitor is an extreme state, stop adjusting the capacitance value of the adjustable capacitor or control the capacitance value of the adjustable capacitor to be adjusted in the opposite direction. The present application can prevent the adjustable capacitor from being damaged.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to a capacitance monitoring method, a capacitance monitoring device, an electronic device, and a computer-readable storage medium. Background Art

[0002] At present, adjustable capacitors can play a good role in various application scenarios, especially by adjusting the capacitance value of the adjustable capacitor, specific circuit functions can be conveniently realized. However, when controlling and adjusting the capacitance value of the adjustable capacitor, the adjustable capacitor may not reach the required capacitance value as expected. Therefore, when controlling and adjusting the capacitance value of the adjustable capacitor, how to monitor the capacitance state of the adjustable capacitor to avoid the adjustable capacitor being damaged has become a problem that needs to be considered. Summary of the invention

[0003] The present application provides a capacitance monitoring method, a capacitance monitoring device, an electronic device and a computer-readable storage medium, which can monitor the capacitance state of an adjustable capacitor when controlling and adjusting the capacitance value of the adjustable capacitor to prevent the adjustable capacitor from being damaged.

[0004] In the first aspect, a capacitance monitoring method is provided, and the capacitance monitoring method is used to monitor the capacitance state of an adjustable capacitor, and the capacitance state includes a non-extreme state and an extreme state. Wherein, the capacitance monitoring method includes: constructing a charge and discharge circuit of an adjustable capacitor and a test resistor; controlling and adjusting the capacitance value of the adjustable capacitor, and controlling the charge and discharge circuit to alternately be in a charging state and a discharging state with a preset duration as a charge and discharge cycle; obtaining the monitoring voltage value of the charge and discharge circuit at intervals, and determining multiple monitoring capacitance values ​​of the adjustable capacitor in sequence according to at least the resistance value of the test resistor, the preset duration, and two adjacent monitoring voltage values; determining the capacitance state of the adjustable capacitor as a non-extreme state or an extreme state according to the relationship between each monitoring capacitance value of the adjustable capacitor and the nominal range; when determining that the capacitance state of the adjustable capacitor is an extreme state, stop adjusting the capacitance value of the adjustable capacitor or control the capacitance value of the adjustable capacitor to be adjusted in the opposite direction.

[0005] In a possible implementation, each charge-discharge cycle includes a charging period and a discharging period. The control of the charge-discharge circuit to alternately be in a charging state and a discharging state with a preset duration as the charge-discharge cycle includes: in the charging period of each charge-discharge cycle, the control of the charge-discharge circuit to be connected to a DC source, and to charge the adjustable capacitor according to the DC power output by the DC source to be in a charging state; in the discharging period of each charge-discharge cycle, the control of the charge-discharge circuit to be disconnected from the DC source, so that the adjustable capacitor is discharged and is in a discharging state.

[0006] In a possible implementation, the monitoring voltage value of the charge and discharge circuit is obtained intermittently, and multiple monitoring capacitance values ​​of the adjustable capacitor are determined in sequence at least according to the resistance value of the test resistor, a preset time length, and two adjacent monitoring voltage values, including: obtaining the monitoring voltage value of the charge and discharge circuit once every 1 / 2 of the preset time length; determining in sequence multiple monitoring capacitance values ​​of the adjustable capacitor in a charging state of the charge and discharge circuit according to the resistance value of the test resistor, the preset time length, the first monitoring voltage value and the second monitoring voltage value obtained twice adjacently, and the voltage value of the DC power output by the DC source; determining in sequence multiple monitoring capacitance values ​​of the adjustable capacitor in a charging state of the charge and discharge circuit according to the resistance value of the test resistor, the preset time length, and the second preset relationship between the second monitoring voltage value and the third monitoring voltage value obtained twice adjacently.

[0007] In a possible implementation manner, the first preset relationship is V2=(Vc-V1)×(1-e x ), x = -t / (R×C1), wherein R is the resistance value of the test resistor, C1 is the monitoring capacitance value of the adjustable capacitor when the charge and discharge circuit is in the charging state, t is 1 / 2 of the preset time length, V1 and V2 are respectively the first monitoring voltage value and the second monitoring voltage value obtained twice adjacently, Vc is the voltage value of the DC power output by the DC source, and e is a natural constant.

[0008] In a possible implementation manner, the second preset relationship is V3=V2×e x , x=-t / (R×C2), where R is the resistance value of the test resistor, C2 is the monitoring capacitance value of the adjustable capacitor when the charge and discharge circuit is in the discharge state, t is 1 / 2 of the preset time length, V2 and V3 are the second monitoring voltage value and the third monitoring voltage value obtained twice adjacently, respectively, and e is a natural constant.

[0009] In a possible implementation, determining whether the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state based on the relationship between each monitored capacitance value of the adjustable capacitor and the nominal range in sequence includes: comparing in sequence whether each monitored capacitance value of the adjustable capacitor is within the nominal range, and when a certain monitored capacitance value is within the nominal range, determining that at the moment corresponding to the monitored capacitance value, the capacitance state of the adjustable capacitor is a non-extreme state; and when a certain monitored capacitance value is outside the nominal range, determining that at the moment corresponding to the monitored capacitance value, the capacitance state of the adjustable capacitor is an extreme state.

[0010] In a possible implementation, after determining in turn that the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state according to the relationship between each monitored capacitance value of the adjustable capacitor and the nominal range, the capacitance monitoring method further includes: when it is determined that the capacitance state of the adjustable capacitor is a non-extreme state and the capacitance value of the adjustable capacitor is not equal to the target capacitance value, controlling to continuously adjust the capacitance value of the adjustable capacitor.

[0011] In the second aspect, a capacitance monitoring device is also provided, wherein the capacitance monitoring device uses the above-mentioned capacitance monitoring method to monitor the capacitance state of the adjustable capacitor, and the capacitance state includes a non-extreme state and an extreme state. Wherein, the capacitance monitoring device includes a test resistor, a control unit, and an acquisition unit. The control unit is used to construct a charge and discharge circuit of the adjustable capacitor and the test resistor, and control and adjust the capacitance value of the adjustable capacitor, and control the charge and discharge circuit to alternately be in a charging state and a discharging state with a preset duration as a charge and discharge cycle. The acquisition unit is used to intermittently acquire the monitoring voltage value of the charge and discharge circuit. Wherein, the control unit is also used to determine the multiple monitoring capacitance values ​​of the adjustable capacitor in sequence at least according to the resistance value of the test resistor, the preset duration, and two adjacent monitoring voltage values, and determine the capacitance state of the adjustable capacitor as the non-extreme state or the extreme state according to the relationship between each monitoring capacitance value of the adjustable capacitor and the nominal range, and when it is determined that the capacitance state of the adjustable capacitor is the extreme state, stop adjusting the capacitance value of the adjustable capacitor or control the capacitance value of the adjustable capacitor to be adjusted in the opposite direction.

[0012] In a third aspect, an electronic device is also provided, the electronic device comprising an adjustable capacitor and the above-mentioned capacitance monitoring device.

[0013] In a fourth aspect, a computer-readable storage medium is further provided, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed on a computer or a processor, the above-mentioned capacitance monitoring method is implemented.

[0014] The capacitance monitoring method, capacitance monitoring device, electronic device and computer-readable storage medium of the present application, by constructing a charging and discharging circuit of an adjustable capacitor and a test resistor, can control the charging and discharging circuit to alternately be in a charging state and a discharging state when controlling the capacitance value of the adjustable capacitor, and then obtain the monitoring voltage value of the charging and discharging circuit at intervals, and determine multiple monitoring capacitance values ​​of the adjustable capacitor in sequence, so as to determine whether the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state, thereby realizing the monitoring of the capacitance state of the adjustable capacitor. At the same time, when it is determined that the capacitance state of the adjustable capacitor is an extreme state, the capacitance value of the adjustable capacitor is stopped from being adjusted or the capacitance value of the adjustable capacitor is controlled to be adjusted in the opposite direction, which can also prevent the adjustable capacitor from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0016] Figure 1 Flow chart of a capacitance monitoring method in an embodiment of the present application.

[0017] Figure 2 for Figure 1 A sub-flowchart of step S200 in FIG.

[0018] Figure 3 for Figure 1 A sub-flowchart of step S300 in FIG.

[0019] Figure 4 for Figure 1 A sub-flowchart of step S400 in FIG.

[0020] Figure 5 FIG. 4 is a flow chart of a capacitance monitoring method in another embodiment of the present application.

[0021] Figure 6 FIG. 4 is a schematic diagram of a capacitance monitoring device in an embodiment of the present application.

[0022] Figure 7 It is a schematic diagram of an electronic device in an embodiment of the present application.

[0023] Explanation of reference numerals: 1000, electronic device, RFP, radio frequency power, Cp, adjustable capacitance, 10, capacitance monitoring device, Rt, test resistor, DC, direct current source, 100, control unit, 200, acquisition unit, Vt, monitoring voltage value, S1, first switch, S2, second switch. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0027] In the description of the embodiments of the present application, it should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the features used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0028] In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or device.

[0029] See also Figure 1 , Figure 1 FIG. 1 is a flow chart of a capacitance monitoring method in an embodiment of the present application. Figure 1 As shown, the present application provides a capacitance monitoring method, which is used to monitor the capacitance state of an adjustable capacitor, where the capacitance state includes a non-extreme state and an extreme state. The capacitance monitoring method includes:

[0030] Step S100: constructing a charge and discharge circuit of an adjustable capacitor and a test resistor;

[0031] Step S200: controlling and adjusting the capacitance value of the adjustable capacitor, and controlling the charge-discharge circuit to alternately be in a charging state and a discharging state with a preset duration as the charge-discharge cycle;

[0032] Step S300: obtaining the monitoring voltage value of the charge-discharge circuit at intervals, and determining a plurality of monitoring capacitance values ​​of the adjustable capacitor in sequence at least according to the resistance value of the test resistor, the preset time length, and two adjacent monitoring voltage values;

[0033] Step S400: determining whether the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state according to the relationship between each monitored capacitance value of the adjustable capacitor and the nominal range;

[0034] Step S500: when it is determined that the capacitance state of the adjustable capacitor is an extreme value state, stop adjusting the capacitance value of the adjustable capacitor or control the capacitance value of the adjustable capacitor to be adjusted in the opposite direction.

[0035] Therefore, the above-mentioned capacitance monitoring method in the present application, by constructing a charging and discharging circuit of an adjustable capacitor and a test resistor, can control the charging and discharging circuit to alternately be in a charging state and a discharging state when controlling the capacitance value of the adjustable capacitor, and then obtain the monitoring voltage value of the charging and discharging circuit intermittently, and determine multiple monitoring capacitance values ​​of the adjustable capacitor in sequence, so as to determine whether the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state, thereby realizing the monitoring of the capacitance state of the adjustable capacitor. At the same time, when it is determined that the capacitance state of the adjustable capacitor is an extreme state, the capacitance value of the adjustable capacitor is stopped from being adjusted or the capacitance value of the adjustable capacitor is controlled to be adjusted in the opposite direction, so as to avoid the adjustable capacitor from being damaged.

[0036] Specifically, when controlling and adjusting the capacitance value of the adjustable capacitor, a controller and an adjusting motor are often used to implement it. The controller outputs a control signal to the adjusting motor so that the adjusting motor adjusts the distance between the two plates of the adjustable capacitor, thereby changing the capacitance value of the adjustable capacitor. However, it is found in actual operation that the adjustable capacitor may not reach the required capacitance value as expected, and when the distance between the two plates of the adjustable capacitor reaches the maximum nominal value or the minimum nominal value, and the controller determines that the distance between the two plates of the adjustable capacitor has not reached the maximum nominal value or the minimum nominal value, and then if the distance between the two plates of the adjustable capacitor continues to be adjusted, the adjustable capacitor will be damaged. Therefore, when controlling and adjusting the capacitance value of the adjustable capacitor, monitoring the capacitance state of the adjustable capacitor can effectively prevent the adjustable capacitor from being damaged, and the current capacitance value of the adjustable capacitor can also be determined by obtaining multiple monitoring capacitance values.

[0037] Please also read Figure 2 , Figure 2 for Figure 1 A sub-flow chart of step S200 in FIG. Each charge-discharge cycle includes a charge period and a discharge period. Figure 1 , Figure 2 As shown, step S200 controls the charge and discharge circuit to alternately be in the charge state and the discharge state with a preset duration as the charge and discharge cycle, which may specifically include:

[0038] Step S210: During the charging period of each charging and discharging cycle, the charging and discharging circuit is controlled to be connected to the DC source, and the adjustable capacitor is charged according to the DC power output by the DC source so as to be in a charging state;

[0039] In step S210, the adjustable capacitor is charged according to the DC power output by the DC source and is in a charging state, that is, the DC source is controlled to output DC power, so as to charge the adjustable capacitor according to the DC power output by the DC source and is in a charging state.

[0040] Step S220: During the discharge period of each charge-discharge cycle, the charge-discharge circuit is controlled to be disconnected from the DC source, so that the adjustable capacitor is discharged and in a discharge state.

[0041] Therefore, the above-mentioned capacitance monitoring method in the present application controls the charging and discharging circuit to be connected or disconnected with the DC source, so that the charging and discharging circuit is correspondingly in the charging period or the discharging stage of each charging and discharging cycle, thereby alternating between the charging state and the discharging state.

[0042] In some embodiments, the duration of the charging period and the duration of the discharging period of each charging and discharging cycle may be equal. In other embodiments, the duration of the charging period and the duration of the discharging period of each charging and discharging cycle may not be equal, as long as the sum of the duration of the charging period and the duration of the discharging period of each charging and discharging cycle is equal to the preset duration.

[0043] In one or more embodiments, the capacitance monitoring method is applied to a capacitance monitoring device, which includes a test resistor, a DC source, a first switch, and a second switch, wherein the test resistor and the second switch are connected to two ends of an adjustable capacitor in sequence, and the DC source is connected to a connection point between the test resistor and the second switch through the first switch, and is connected to a connection point between the second switch and the adjustable capacitor. The test resistor is used to form a charge-discharge circuit with the adjustable capacitor, the DC source is used to output DC power, and the first switch and the second switch are used to switch between on and off states, so that the charge-discharge circuit is alternately in a charge state and a discharge state with a preset duration as a charge-discharge cycle.

[0044] Further, controlling the charge-discharge circuit to connect to the DC source in step S210 may specifically include: controlling the first switch to be turned on, and controlling the second switch to be turned off. Controlling the charge-discharge circuit to disconnect from the DC source in step S220 may specifically include: controlling the first switch to be turned off, and controlling the second switch to be turned on.

[0045] Please also read Figure 3 , Figure 3 for Figure 1 A sub-flow chart of step S300 in FIG. Figure 1 , Figure 3 As shown, step S300: intermittently obtaining the monitoring voltage value of the charge and discharge circuit, and determining multiple monitoring capacitance values ​​of the adjustable capacitor in sequence at least according to the resistance value of the test resistor, the preset time length, and two adjacent monitoring voltage values, may specifically include:

[0046] Step S310: acquiring a monitoring voltage value of the charge-discharge circuit once every 1 / 2 of a preset time period;

[0047] Among them, the time length of the charging period and the time length of the discharging period of each charging and discharging cycle are equal, so that the monitoring voltage value of the charging and discharging circuit is obtained once every 1 / 2 of the preset time length, that is, the monitoring voltage value of the charging and discharging circuit is obtained once when the charging and discharging circuit switches from the charging state to the discharging state, and the monitoring voltage value of the charging and discharging circuit is obtained once when the charging and discharging circuit switches from the discharging state to the charging state.

[0048] Step S320: sequentially determining a plurality of monitoring capacitance values ​​of the adjustable capacitor in a charging state in the charge-discharge circuit according to the resistance value of the test resistor, the preset time length, a first preset relationship between the first monitoring voltage value and the second monitoring voltage value obtained twice adjacently, and the voltage value of the DC power output by the DC source;

[0049] Step S330: sequentially determine multiple monitoring capacitance values ​​of the adjustable capacitor in the charging state of the charge-discharge circuit according to the resistance value of the test resistor, the preset time length, and a second preset relationship between the second monitoring voltage value and the third monitoring voltage value obtained twice adjacently.

[0050] Among them, the first monitoring voltage value and the second monitoring voltage value obtained twice adjacently are the two monitoring voltage values ​​obtained at the start and end time of the charging period of each charging and discharging cycle, and the second monitoring voltage value and the third monitoring voltage value obtained twice adjacently are the two monitoring voltage values ​​obtained at the start and end time of the discharge period of each charging and discharging cycle. It should be noted that the end time of the charging period of each charging and discharging cycle is also the start time of the discharge phase of the charging and discharging cycle, and the end time of the discharge phase of each charging and discharging cycle is also the start time of the charging period of the next charging and discharging cycle.

[0051] In particular, step S320 and step S330 may be executed successively or simultaneously, and the present application is not limited thereto. Generally speaking, when a set of the first monitoring voltage value and the second monitoring voltage value are obtained, step S320 may be executed once, and then when a set of the second monitoring voltage value and the third monitoring voltage value are obtained, step S330 may be executed once. Specifically, when a second monitoring voltage value is obtained, step S320 may be executed once, and then when a corresponding third monitoring voltage value is obtained, step S330 may be executed once.

[0052] Therefore, the above-mentioned capacitance monitoring method in the present application, by configuring to obtain a monitoring voltage value of the charging and discharging circuit once every 1 / 2 of the preset time interval, and according to the first preset relationship and the second preset relationship, can not only continuously determine multiple monitoring capacitance values ​​of the adjustable capacitor to continuously monitor the capacitance state of the adjustable capacitor, but also can determine the two monitoring capacitance values ​​of the adjustable capacitor according to the three detection voltage values ​​in each charging and discharging cycle, the monitoring frequency is faster, and the monitoring efficiency is also higher.

[0053] In one or more embodiments, the first preset relationship is V2=(Vc-V1)×(1-e x ), x = -t / (R×C1), where R is the resistance value of the test resistor, C1 is the monitoring capacitance value of the adjustable capacitor in the charging state of the charge and discharge circuit, t is 1 / 2 of the preset time length, V1 and V2 are the first monitoring voltage value and the second monitoring voltage value obtained twice adjacently, Vc is the voltage value of the DC power output by the DC source, and e is a natural constant.

[0054] Therefore, the above-mentioned capacitance monitoring method in the present application can determine the monitoring capacitance value of the adjustable capacitor when the charging and discharging circuit is in the charging state based on the first monitoring voltage value and the second monitoring voltage value obtained when the charging and discharging circuit is in the charging state, and based on known parameters.

[0055] In one or more embodiments, the second preset relationship is V3=V2×e x , x=-t / (R×C2), where R is the resistance value of the test resistor, C2 is the monitoring capacitance value of the adjustable capacitor in the discharge state of the charge and discharge circuit, t is 1 / 2 of the preset time length, V2 and V3 are the second monitoring voltage value and the third monitoring voltage value obtained twice adjacently, respectively, and e is a natural constant.

[0056] Therefore, the above-mentioned capacitance monitoring method in the present application can determine the monitoring capacitance value of the adjustable capacitor when the charging and discharging circuit is in the discharging state based on the second monitoring voltage value and the third monitoring voltage value obtained when the charging and discharging circuit is in the discharging state, and based on known parameters.

[0057] In one or more embodiments, the preset time length may be less than or equal to the first preset value, thereby being able to adapt to the adjustment speed of the capacitance value of the adjustable capacitor and further speeding up the monitoring frequency without fully charging or discharging the charge and discharge circuit to zero, and being able to continuously monitor the capacitance state of the adjustable capacitor.

[0058] Furthermore, the first preset value may be less than or equal to 2 times the charge and discharge constant, or less than or equal to 3 times the charge and discharge constant. Generally speaking, the first preset value may be configured as 2 times the charge and discharge constant. The charge and discharge constant may be the product of the resistance value of the test resistor and the maximum nominal value of the adjustable capacitor.

[0059] In one or more embodiments, the charge and discharge constant may be less than or equal to the second preset value, thereby enabling the detection frequency to be faster. Specifically, generally speaking, the resistance value of the test resistor may be configured to be less than or equal to the third preset value so that the charge and discharge constant is less than or equal to the second preset value. Alternatively, when the maximum nominal value of the adjustable capacitor is small, for example, when applied to an impedance matching network, the maximum nominal value of the adjustable capacitor may be only 100pF, then the resistance value of the test resistor may be set according to specific needs.

[0060] In one or more embodiments, the monitoring voltage value of the charge-discharge circuit is obtained intermittently in step S300, wherein the interval may be a uniform interval or an uneven interval. The interval may be set as required and may vary specifically according to a preset duration and a change in the resistance value of the test resistor. For example, by setting a preset duration and / or a resistance value of the test resistor, the interval may be very small, which is equivalent to continuously obtaining the monitoring voltage value of the charge-discharge circuit.

[0061] Please also read Figure 4 , Figure 4 for Figure 1 A sub-flow chart of step S400 in FIG. Figure 1 , Figure 4 As shown, step S400: determining whether the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state according to the relationship between each monitored capacitance value of the adjustable capacitor and the nominal range in sequence, may specifically include:

[0062] Step S410: Compare in turn whether each monitoring capacitance value of the adjustable capacitor is within the nominal range. When a certain monitoring capacitance value is within the nominal range, determine that at the moment corresponding to the monitoring capacitance value, the capacitance state of the adjustable capacitor is a non-extreme state; when a certain monitoring capacitance value is outside the nominal range, determine that at the moment corresponding to the monitoring capacitance value, the capacitance state of the adjustable capacitor is an extreme state.

[0063] Among them, when a certain monitoring capacitance value is within the nominal range of step S410, it may specifically include: when a certain monitoring capacitance value is greater than the minimum nominal value and less than the maximum nominal value. When a certain monitoring capacitance value is outside the nominal range of step S410, it may specifically include: when a certain monitoring capacitance value is less than or equal to the minimum nominal value or greater than or equal to the maximum nominal value. Further, generally speaking, when a certain monitoring capacitance value is equal to the minimum nominal value or equal to the maximum nominal value, it is determined that at the moment corresponding to the monitoring capacitance value, the capacitance state of the adjustable capacitor is an extreme value state.

[0064] Therefore, the above-mentioned capacitance monitoring method in the present application can determine whether the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state at the moment corresponding to each monitoring capacitance value by sequentially comparing whether each monitoring capacitance value of the adjustable capacitor is within the nominal range.

[0065] Specifically, the capacitance state of the adjustable capacitor is a non-extreme state, that is, the adjustable capacitor is adjustable in the current direction; the capacitance state of the adjustable capacitor is an extreme state, that is, the adjustable capacitor is not adjustable in the current direction.

[0066] See also Figure 5 , Figure 5 FIG. 1 is a flow chart of a capacitance monitoring method in another embodiment of the present application. Figure 5 In step S400, after determining that the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state according to the relationship between each monitored capacitance value of the adjustable capacitor and the nominal range, the capacitance monitoring method may further include:

[0067] Step S600: when it is determined that the capacitance state of the adjustable capacitor is a non-extreme value state and the capacitance value of the adjustable capacitor is not equal to the target capacitance value, controlling to continuously adjust the capacitance value of the adjustable capacitor.

[0068] in, Figure 5 The steps S100 to S400 shown in FIG. Figure 1 The relevant introduction in will not be repeated here.

[0069] Therefore, the capacitance monitoring method in the present application can adjust the capacitance value of the adjustable capacitor to the target capacitance value without damaging the adjustable capacitor.

[0070] Please refer again Figure 1 .like Figure 1 As shown, the control of step S500 adjusts the capacitance value of the adjustable capacitor in the opposite direction, which may specifically include: controlling to adjust the capacitance value of the adjustable capacitor in the opposite direction to be equal to the target capacitance value.

[0071] In one or more embodiments, the adjustable capacitor can be used to adjust the power parameters of the RF power passing through, wherein the power value of the DC power output by the DC source is less than the power value of the RF power passing through the adjustable capacitor. The power parameters are amplitude, phase, etc., and impedance matching is achieved by adjusting the power parameters of the RF power.

[0072] Furthermore, the ratio of the power value of the DC power output by the DC source to the power value of the RF power passing through the adjustable capacitor is less than a fourth preset value, thereby avoiding as much as possible the influence of the adjustable capacitor on the adjustment of the power parameters of the RF power passing through when executing the capacitance monitoring method.

[0073] The capacitance monitoring method of the present application can determine whether the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state through the above steps, thereby monitoring the capacitance state of the adjustable capacitor and indicating the adjustment method of the adjustable capacitor according to the capacitance state of the adjustable capacitor.

[0074] See also Figure 6 , Figure 6 FIG. 1 is a schematic diagram of a capacitance monitoring device in an embodiment of the present application. Figure 6 As shown, the present application also provides a capacitance monitoring device 10, which uses the capacitance monitoring method of any of the aforementioned embodiments to monitor the capacitance state of the adjustable capacitor Cp, and the capacitance state includes a non-extreme state and an extreme state. Among them, the capacitance monitoring device 10 includes a test resistor Rt, a control unit 100, and an acquisition unit 200. The control unit 100 is used to construct a charge and discharge circuit of the adjustable capacitor Cp and the test resistor Rt, and to control and adjust the capacitance value of the adjustable capacitor Cp, and control the charge and discharge circuit to alternately be in a charging state and a discharging state with a preset duration as the charge and discharge cycle. The acquisition unit 200 is used to intermittently obtain the monitoring voltage value Vt of the charge and discharge circuit. Among them, the control unit 100 is also used to determine multiple monitoring capacitance values ​​of the adjustable capacitor Cp in sequence according to at least the resistance value of the test resistor Rt, the preset time length and two adjacent monitoring voltage values ​​Vt, and determine the capacitance state of the adjustable capacitor Cp as a non-extreme state or an extreme state according to the relationship between each monitoring capacitance value of the adjustable capacitor Cp and the nominal range, and when it is determined that the capacitance state of the adjustable capacitor Cp is an extreme state, stop adjusting the capacitance value of the adjustable capacitor Cp or control the capacitance value of the adjustable capacitor Cp to be adjusted in the opposite direction.

[0075] Please refer again Figure 1 .like Figure 1 As shown, the capacitance monitoring method is used to monitor the capacitance state of the adjustable capacitor, and the capacitance state includes a non-extreme state and an extreme state. The capacitance monitoring method includes:

[0076] Step S100: constructing a charge and discharge circuit of an adjustable capacitor and a test resistor;

[0077] Step S200: controlling and adjusting the capacitance value of the adjustable capacitor, and controlling the charge-discharge circuit to alternately be in a charging state and a discharging state with a preset duration as the charge-discharge cycle;

[0078] Step S300: obtaining the monitoring voltage value of the charge-discharge circuit at intervals, and determining a plurality of monitoring capacitance values ​​of the adjustable capacitor in sequence at least according to the resistance value of the test resistor, the preset time length, and two adjacent monitoring voltage values;

[0079] Step S400: determining whether the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state according to the relationship between each monitored capacitance value of the adjustable capacitor and the nominal range;

[0080] Step S500: when it is determined that the capacitance state of the adjustable capacitor is an extreme value state, stop adjusting the capacitance value of the adjustable capacitor or control the capacitance value of the adjustable capacitor to be adjusted in the opposite direction.

[0081] Among them, more specific steps of the capacitance monitoring method can refer to the relevant content of the capacitance monitoring method in any of the aforementioned embodiments, which will not be repeated here.

[0082] like Figure 6 As shown, the capacitance monitoring device 10 may also include a direct current source DC, a first switch S1, and a second switch S2, wherein the test resistor Rt and the second switch S2 are connected to both ends of the adjustable capacitor Cp in sequence, and the direct current source DC is connected to the connection point between the test resistor Rt and the second switch S2 through the first switch S1, and is connected to the connection point between the second switch S2 and the adjustable capacitor Cp. The test resistor Rt is used to form a charge-discharge circuit with the adjustable capacitor Cp, the direct current source DC is used to output direct current power, and the first switch S1 and the second switch S2 are used to switch between the on and off states accordingly, so that the charge-discharge circuit is alternately in the charging state and the discharging state with a preset duration as the charge-discharge cycle.

[0083] Furthermore, the control unit 100 controls the on and off states of the first switch S1 and the second switch S2 to control the charge and discharge circuit to alternately be in the charge state and the discharge state with a preset duration as the charge and discharge cycle.

[0084] In one or more embodiments, the capacitance monitoring device 10 may further include a third switch (not shown in the figure), the third switch is connected between the test resistor Rt and the adjustable capacitor Cp, and the control unit 100 controls the third switch to be turned on to construct a charging and discharging circuit between the adjustable capacitor Cp and the test resistor Rt.

[0085] In one or more embodiments, the control unit 100 may include a controller and an adjusting motor connected to each other, and the controller is used to output a control signal to the adjusting motor to control the adjusting motor to adjust the capacitance value of the adjustable capacitor Cp.

[0086] In one or more embodiments, the controller may be a general-purpose processor such as a central processing unit (CPU), or a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate logic devices, transistor logic devices, and other logic control devices, or a microprocessor such as a micro control unit (MCU).

[0087] In one or more embodiments, the acquisition unit 200 may be a voltmeter, or other voltage detection devices such as a voltage sensor, or a voltage detection circuit composed of components such as a resistor, a capacitor, and a diode.

[0088] In one or more embodiments, the steps of the capacitance monitoring method and the functional operations performed by the capacitance monitoring device 10 correspond to each other, and the relevant contents can be referenced to each other, which will not be repeated here. The control unit 100 is mainly used to determine the capacitance state of the adjustable capacitor Cp.

[0089] The capacitance monitoring method and capacitance monitoring device 10 of the present application can determine whether the capacitance state of the adjustable capacitor Cp is a non-extreme state or an extreme state through the above steps and structures, thereby monitoring the capacitance state of the adjustable capacitor Cp and indicating the adjustment method of the adjustable capacitor Cp according to the capacitance state of the adjustable capacitor Cp.

[0090] See also Figure 7 , Figure 7 FIG. 1 is a schematic diagram of an electronic device in an embodiment of the present application. Figure 7 As shown, the present application further provides an electronic device 1000, and the electronic device 1000 includes an adjustable capacitor Cp and the capacitance monitoring device 10 of any of the aforementioned embodiments.

[0091] Please refer again Figure 6 .like Figure 6As shown, the capacitance monitoring device 10 uses the capacitance monitoring method of any of the aforementioned embodiments to monitor the capacitance state of the adjustable capacitor Cp, and the capacitance state includes a non-extreme state and an extreme state. Among them, the capacitance monitoring device 10 includes a test resistor Rt, a control unit 100, and an acquisition unit 200. The control unit 100 is used to construct a charge and discharge circuit of the adjustable capacitor Cp and the test resistor Rt, and to control and adjust the capacitance value of the adjustable capacitor Cp, and control the charge and discharge circuit to alternately be in a charging state and a discharging state with a preset duration as the charge and discharge cycle. The acquisition unit 200 is used to intermittently obtain the monitoring voltage value Vt of the charge and discharge circuit. Among them, the control unit 100 is also used to determine multiple monitoring capacitance values ​​of the adjustable capacitor Cp in sequence according to at least the resistance value of the test resistor Rt, the preset time length and two adjacent monitoring voltage values ​​Vt, and determine the capacitance state of the adjustable capacitor Cp as a non-extreme state or an extreme state according to the relationship between each monitoring capacitance value of the adjustable capacitor Cp and the nominal range, and when it is determined that the capacitance state of the adjustable capacitor Cp is an extreme state, stop adjusting the capacitance value of the adjustable capacitor Cp or control the capacitance value of the adjustable capacitor Cp to be adjusted in the opposite direction.

[0092] The more specific structure of the capacitance monitoring device 10 may refer to the relevant contents of the capacitance monitoring device 10 in any of the aforementioned embodiments, which will not be described in detail here.

[0093] In one or more embodiments, the electronic device 1000 may be a radio frequency power supply device, which may be used to output radio frequency power RFP to a load, and the adjustable capacitor Cp may be used to adjust the power parameters of the radio frequency power RFP passing through. The power parameters include amplitude, phase, etc., and impedance matching between the radio frequency power supply device and the load is achieved by adjusting the power parameters of the radio frequency power RFP.

[0094] The capacitance monitoring method, capacitance monitoring device 10 and electronic device 1000 of the present application can determine whether the capacitance state of the adjustable capacitor Cp is a non-extreme state or an extreme state through the above steps and structures, thereby monitoring the capacitance state of the adjustable capacitor Cp and indicating the adjustment method of the adjustable capacitor Cp according to the capacitance state of the adjustable capacitor Cp.

[0095] The present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer program runs on a computer or a processor, the capacitance monitoring method of any of the aforementioned embodiments is implemented.

[0096] In the multiple embodiments provided in the present application, it should be understood that the disclosed methods, devices and equipment can be implemented in other ways. For example, the device embodiments described above are only schematic; for example, the division of units is only a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0097] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0098] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0099] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform some steps of the methods of various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program codes.

[0100] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A capacitance monitoring method, characterized in that: Used to monitor the capacitance state of the adjustable capacitor, wherein the capacitance state includes a non-extreme value state and an extreme value state; Wherein, the capacitance monitoring method comprises: Construct a charge and discharge circuit of an adjustable capacitor and a test resistor; Controlling and adjusting the capacitance value of the adjustable capacitor, and controlling the charge and discharge circuit to alternately be in a charging state and a discharging state with a preset duration as the charge and discharge cycle; Obtaining monitoring voltage values ​​of the charge and discharge circuit at intervals, and determining multiple monitoring capacitance values ​​of the adjustable capacitor in sequence at least according to the resistance value of the test resistor, a preset time length, and two adjacent monitoring voltage values; determining whether the capacitance state of the adjustable capacitor is a non-extreme value state or an extreme value state according to the relationship between each monitored capacitance value of the adjustable capacitor and the nominal range; When it is determined that the capacitance state of the adjustable capacitor is an extreme value state, the capacitance value of the adjustable capacitor is stopped from being adjusted or the capacitance value of the adjustable capacitor is controlled to be adjusted in the opposite direction.

2. The capacitance monitoring method according to claim 1, characterized in that: Each charge and discharge cycle includes a charging period and a discharging period; The control charging and discharging circuit is alternately in a charging state and a discharging state with a preset duration as a charging and discharging cycle, including: During the charging period of each charging and discharging cycle, the charging and discharging circuit is controlled to be connected to the DC source, and the adjustable capacitor is charged according to the DC power output by the DC source so as to be in a charging state; During the discharge period of each charge and discharge cycle, the charge and discharge circuit is controlled to be disconnected from the DC source so that the adjustable capacitor is discharged and in a discharge state.

3. The capacitance monitoring method according to claim 2, characterized in that: The monitoring voltage value of the charge-discharge circuit is obtained at intervals, and multiple monitoring capacitance values ​​of the adjustable capacitor are determined in sequence at least according to the resistance value of the test resistor, the preset time length, and two adjacent monitoring voltage values, including: The monitoring voltage value of the charge and discharge circuit is obtained once every 1 / 2 of the preset time period; Determine in sequence a plurality of monitoring capacitance values ​​of the adjustable capacitor in a charging state in the charging and discharging circuit according to a first preset relationship between a resistance value of the test resistor, a preset time length, a first monitoring voltage value and a second monitoring voltage value obtained twice adjacently, and a voltage value of the DC power output by the DC source; According to the resistance value of the test resistor, the preset time length, and the second preset relationship between the second monitoring voltage value and the third monitoring voltage value obtained twice adjacently, multiple monitoring capacitance values ​​of the adjustable capacitor in the charging and discharging circuit are determined in sequence.

4. The capacitance monitoring method according to claim 3, characterized in that: The first preset relationship is V2=(Vc-V1)×(1-e x ), x = -t / (R×C1), wherein R is the resistance value of the test resistor, C1 is the monitoring capacitance value of the adjustable capacitor when the charge and discharge circuit is in the charging state, t is 1 / 2 of the preset time length, V1 and V2 are respectively the first monitoring voltage value and the second monitoring voltage value obtained twice adjacently, Vc is the voltage value of the DC power output by the DC source, and e is a natural constant.

5. The capacitance monitoring method according to claim 3, characterized in that: The second preset relationship is V3=V2×e x , x=-t / (R×C2), where R is the resistance value of the test resistor, C2 is the monitoring capacitance value of the adjustable capacitor when the charge and discharge circuit is in the discharge state, t is 1 / 2 of the preset time length, V2 and V3 are the second monitoring voltage value and the third monitoring voltage value obtained twice adjacently, respectively, and e is a natural constant.

6. The capacitance monitoring method according to claim 1, characterized in that: The step of determining whether the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state according to the relationship between each monitored capacitance value of the adjustable capacitor and the nominal range in sequence includes: Compare each monitoring capacitance value of the adjustable capacitor in turn to see if it is within the nominal range. When a certain monitoring capacitance value is within the nominal range, determine that at the moment corresponding to the monitoring capacitance value, the capacitance state of the adjustable capacitor is a non-extreme state; when a certain monitoring capacitance value is outside the nominal range, determine that at the moment corresponding to the monitoring capacitance value, the capacitance state of the adjustable capacitor is an extreme state.

7. The capacitance monitoring method according to claim 1, characterized in that: After determining that the capacitance state of the adjustable capacitor is a non-extreme state or an extreme state according to the relationship between each monitored capacitance value of the adjustable capacitor and the nominal range, the capacitance monitoring method further includes: When it is determined that the capacitance state of the adjustable capacitor is a non-extreme value state and the capacitance value of the adjustable capacitor is not equal to the target capacitance value, the capacitance value of the adjustable capacitor is continuously adjusted.

8. A capacitance monitoring device, characterized in that: The capacitance monitoring device monitors the capacitance state of the adjustable capacitor using the capacitance monitoring method according to any one of claims 1 to 7, wherein the capacitance state includes a non-extreme state and an extreme state; Wherein, the capacitance monitoring device includes a test resistor, a control unit and an acquisition unit; The control unit is used to construct a charge and discharge circuit of the adjustable capacitor and the test resistor, and to control and adjust the capacitance value of the adjustable capacitor, and to control the charge and discharge circuit to alternately be in a charging state and a discharging state with a preset duration as a charge and discharge cycle; The acquisition unit is used to intermittently acquire the monitoring voltage value of the charge and discharge circuit; Among them, the control unit is also used to determine the multiple monitoring capacitance values ​​of the adjustable capacitor in sequence according to at least the resistance value of the test resistor, the preset time length and two adjacent monitoring voltage values, and determine the capacitance state of the adjustable capacitor as the non-extreme state or the extreme state according to the relationship between each monitoring capacitance value of the adjustable capacitor and the nominal range, and when it is determined that the capacitance state of the adjustable capacitor is the extreme state, stop adjusting the capacitance value of the adjustable capacitor or control the capacitance value of the adjustable capacitor to be adjusted in the opposite direction.

9. An electronic device, characterized in that: It comprises an adjustable capacitor and the capacitance monitoring device as claimed in claim 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed on a computer or a processor, the capacitance monitoring method according to any one of claims 1 to 7 is implemented.

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