System fault awareness method and apparatus, computer device, and storage medium

Abstract

The application relates to a system fault sensing method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a real-time voltage oscillation signal collected by a voltage sensor placed between detection loops of a to-be-detected system when the to-be-detected system is powered on and powered off; wherein the detection loop is a loop in which a source and a drain of a switching device in the to-be-detected system are located; determining a degradation trend of the to-be-detected system according to the real-time voltage oscillation signal and a reference voltage oscillation signal corresponding to the detection loop of the to-be-detected system; and performing fault sensing on the to-be-detected system according to the degradation trend of the to-be-detected system. Through the above method, the detection of a slight fault and the prediction of a system fault can be realized.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a system fault perception method, apparatus, computer equipment, and storage medium. Background Art

[0002] With the continuous development of microelectronics technology, the degree of informatization, intelligence and electrification of modern equipment is constantly improving. The performance degradation of electronic components will seriously affect the normal operation of various modern systems, thereby affecting normal production and life. Therefore, it is extremely important to perceive these system failures.

[0003] However, existing fault sensing methods typically use sensors such as current transformers, Rogowski coils, and Hall sensors to online monitor current, voltage, and other signals from power electronic devices in equipment systems to obtain circuit, module, or system fault information. This approach can only diagnose relatively obvious system faults and can only detect faults after they occur in the system under test. It cannot monitor system degradation in real time or predict system failures. Therefore, how to detect system degradation in real time and predict failures has become an urgent problem. Summary of the Invention

[0004] Based on this, it is necessary to provide a system fault perception method, device, computer equipment and storage medium that can detect system degradation process in real time and predict faults in response to the above technical problems.

[0005] In a first aspect, the present application provides a method for detecting system failures. The method includes:

[0006] Acquire a real-time voltage oscillation signal collected by a voltage sensor placed between detection circuits of the system to be detected when the system to be detected is powered on or off; wherein the detection circuit is the circuit where the source and drain electrodes corresponding to the switching device in the system to be detected are located;

[0007] Determine the degradation trend of the system to be detected based on the real-time voltage oscillation signal and the reference voltage oscillation signal corresponding to the detection circuit of the system to be detected;

[0008] According to the degradation trend of the system to be detected, fault perception is performed on the system to be detected.

[0009] In one embodiment, determining the degradation trend of the system to be detected based on the real-time voltage oscillation signal and the reference voltage oscillation signal corresponding to the detection circuit of the system to be detected includes:

[0010] Determine the real-time oscillation frequency according to the real-time voltage oscillation signal;

[0011] Determining a reference oscillation frequency based on a reference voltage oscillation signal corresponding to a detection circuit of the system to be detected;

[0012] The degradation trend of the system to be detected is determined according to the real-time oscillation frequency and the reference oscillation frequency.

[0013] In one embodiment, determining the real-time oscillation frequency according to the real-time voltage oscillation signal includes:

[0014] Determine the voltage oscillation period according to the real-time voltage oscillation signal;

[0015] According to the voltage oscillation period, the real-time oscillation frequency is determined.

[0016] In one embodiment, determining the degradation trend of the system to be detected based on the real-time oscillation frequency and the reference oscillation frequency includes:

[0017] The degradation trend of the system to be detected is determined according to the ratio of the real-time oscillation frequency to the reference oscillation frequency.

[0018] In one embodiment, the voltage sensor is a voltage sensor with a capacitive coupling structure; the voltage sensor includes two upper and lower insulating plates, a coupling structure impedance and a voltage output port; wherein the upper insulating plate is used to place the energized wire of the detection circuit, and the lower insulating plate is used to place a metal sheet that senses the real-time voltage oscillation signal of the energized wire; one end of the coupling structure impedance is connected to the metal sheet, and the other end of the coupling structure impedance is connected to the voltage output port; the real-time voltage oscillation signal sensed by the metal sheet is transmitted to the voltage output port through the coupling structure impedance.

[0019] In one embodiment, the system to be detected includes a DC-to-AC inverter and / or a DC-to-DC power supply circuit.

[0020] In a second aspect, the present application also provides a system fault sensing device. The device includes:

[0021] A signal acquisition module is used to acquire a real-time voltage oscillation signal collected by a voltage sensor placed between detection circuits of the system to be detected when the system to be detected is powered on and off; wherein the detection circuit is the circuit where the source and drain electrodes corresponding to the switching device in the system to be detected are located;

[0022] A trend determination module is used to determine the degradation trend of the system to be detected based on the real-time voltage oscillation signal and the reference voltage oscillation signal corresponding to the detection circuit of the system to be detected;

[0023] The fault sensing module is used to sense faults in the system to be detected based on the degradation trend of the system to be detected.

[0024] In a third aspect, the present application also provides a computer device. The computer device comprises a memory and a processor. The memory stores a computer program. The processor implements the following steps when executing the computer program:

[0025] acquiring a real-time voltage oscillation signal collected by a voltage sensor placed between detection loops of the to-be-detected system when the to-be-detected system is powered on or powered off; wherein the detection loops are loops in which source electrodes and drain electrodes corresponding to switching devices in the to-be-detected system are located;

[0026] determining a degradation trend of the to-be-detected system according to the real-time voltage oscillation signal and a reference voltage oscillation signal corresponding to the detection loops of the to-be-detected system;

[0027] performing fault perception on the to-be-detected system according to the degradation trend of the to-be-detected system.

[0028] In a fourth aspect, the present application also provides a computer readable storage medium. The computer readable storage medium stores a computer program. The computer program is executed by a processor to implement the following steps:

[0029] acquiring a real-time voltage oscillation signal collected by a voltage sensor placed between detection loops of the to-be-detected system when the to-be-detected system is powered on or powered off; wherein the detection loops are loops in which source electrodes and drain electrodes corresponding to switching devices in the to-be-detected system are located;

[0030] determining a degradation trend of the to-be-detected system according to the real-time voltage oscillation signal and a reference voltage oscillation signal corresponding to the detection loops of the to-be-detected system;

[0031] performing fault perception on the to-be-detected system according to the degradation trend of the to-be-detected system.

[0032] In a fifth aspect, the present application also provides a computer program product. The computer program product comprises a computer program. The computer program is executed by a processor to implement the following steps:

[0033] acquiring a real-time voltage oscillation signal collected by a voltage sensor placed between detection loops of the to-be-detected system when the to-be-detected system is powered on or powered off; wherein the detection loops are loops in which source electrodes and drain electrodes corresponding to switching devices in the to-be-detected system are located;

[0034] determining a degradation trend of the to-be-detected system according to the real-time voltage oscillation signal and a reference voltage oscillation signal corresponding to the detection loops of the to-be-detected system;

[0035] performing fault perception on the to-be-detected system according to the degradation trend of the to-be-detected system.

[0036] The above-mentioned system fault sensing method, device, computer equipment and storage medium. A voltage sensor is used to collect the real-time voltage oscillation signal of the system to be detected when it is powered on and off, and compares it with the reference voltage oscillation signal corresponding to the detection circuit of the system to be detected. Based on the comparison result of the two oscillation signals, the degradation trend of the system to be detected is determined, and then system faults are predicted based on the degradation trend of the system to be detected. This method introduces a voltage sensor. Each time the system to be detected is powered on and off, the real-time voltage oscillation signal of the detection circuit and the reference voltage oscillation signal are used to reflect the degradation trend of the detection system. By analyzing the degradation trend, an impending failure of the system to be detected can be predicted before it occurs, achieving the effect of predicting system faults. In addition, even if the system to be detected exhibits slight degradation, the slight difference between the real-time voltage oscillation signal and the reference voltage oscillation signal can be used to reflect the degradation trend of the system to be detected, thereby achieving real-time detection of slight faults. In other words, this solution can not only detect slight faults, but also predict system faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a diagram of an application environment of a system fault perception method in one embodiment;

[0038] Figure 2 1 is a flow chart of a method for sensing system faults in one embodiment;

[0039] Figure 3 1 is a flow chart of a method for determining a degradation trend of a system to be detected in one embodiment;

[0040] Figure 4 Schematic diagram of the structure of a voltage sensor in one embodiment;

[0041] Figure 5 is a flow chart of a system fault perception method according to another embodiment;

[0042] Figure 6 A fault detection principle of a DC-to-AC inverter in one embodiment;

[0043] Figure 7 A fault detection principle of a DC-DC power supply circuit in another embodiment is provided;

[0044] Figure 8 is a structural block diagram of a system fault sensing device in one embodiment;

[0045] Figure 9 is a structural block diagram of a system fault sensing device in another embodiment;

[0046] Figure 10 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0048] The system fault perception method provided in the embodiment of the present application can be applied to Figure 1 In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in FIG. Figure 1 As shown. The computer device includes a processor, a memory and a network interface connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data required for related processing. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, it implements the system fault perception method shown in any of the following embodiments.

[0049] In one embodiment, Figure 2 As shown, a system fault perception method is provided, which is applied to Figure 1 The computer device in the example is used to illustrate the process, including the following steps:

[0050] S201 , obtaining a real-time voltage oscillation signal collected by a voltage sensor placed between detection circuits of the system to be detected when the system to be detected is powered on or off.

[0051] The detection circuit is a circuit where the source and drain corresponding to the switch device in the system to be detected are located. The system to be detected includes a DC-to-AC inverter and / or a DC-to-DC power supply circuit.

[0052] Among them, the power-on and power-off of the system to be detected refers to the moment when the circuit to be detected is powered on or off; the voltage oscillation signal is the voltage signal formed by the voltage oscillation when the detection circuit of the system to be detected is powered on or off; the switching device in the system to be detected has a gate, a drain and a source, and the drain and the source are together in a loop, which is the detection loop of the system to be detected.

[0053] Optionally, the voltage sensor is placed above or below the detection loop of the to-be-detected system, and when the switch of the to-be-detected system is turned on or off, the detection loop is powered on or off, at this time, the voltage in the detection loop oscillates, and the voltage sensor placed above or below the detection loop of the to-be-detected system can perceive the oscillation and collect the oscillation signal as a real-time voltage oscillation signal.

[0054] Optionally, the voltage sensor for collecting the real-time voltage oscillation signal is preferably a voltage sensor based on a capacitive coupling structure. The voltage sensor based on the capacitive coupling structure can realize fault detection of the to-be-detected system without contacting the detection loop of the to-be-detected system. Compared with the existing contact type, the method in the present application does not need to change the original loop of the to-be-detected system, so that the detection is more accurate, and the use is more convenient by placing above or below the detection loop of the to-be-detected system.

[0055] S202, determining the degradation trend of the to-be-detected system according to the real-time voltage oscillation signal and the reference voltage oscillation signal corresponding to the detection loop of the to-be-detected system.

[0056] The reference voltage oscillation signal is the voltage oscillation signal of the to-be-detected system in the initial state or the factory state, which can be measured by the voltage sensor placed between the detection loop of the to-be-detected system when the to-be-detected system is just put into use (i.e. the first time of power on / off operation), or can be marked when the to-be-detected system is shipped; the real-time voltage oscillation signal is the voltage oscillation signal collected by the voltage sensor when the to-be-detected system is in use; and the degradation trend is the degradation degree of each element in the to-be-detected system.

[0057] Optionally, a relationship mapping table can be made in advance according to the relationship between various different voltage oscillation signals, reference voltage oscillation signals and the degradation trend of the to-be-detected system, and the degradation trend of the to-be-detected system is determined by looking up the table according to the real-time voltage oscillation signal and the reference voltage oscillation signal.

[0058] S203, performing fault perception on the to-be-detected system according to the degradation trend of the to-be-detected system.

[0059] Optionally, a fault threshold can be set in advance, for example, the fault threshold is set to 30%, and when it is detected that the degradation degree of the to-be-detected system is about to exceed the fault threshold, it can be determined that the to-be-detected system is about to fail, thereby realizing fault perception of the to-be-detected system.

[0060] The above embodiment collects the real-time voltage oscillation signal of the to-be-detected system when the to-be-detected system is powered on and powered off through the voltage sensor, compares the real-time voltage oscillation signal with the reference voltage oscillation signal corresponding to the detection loop of the to-be-detected system, determines the degradation trend of the to-be-detected system according to the comparison result of the two oscillation signals, and predicts the system failure according to the degradation trend of the to-be-detected system. In this method, the voltage sensor is introduced, and the real-time voltage oscillation signal and the reference voltage oscillation signal of the detection loop are used to reflect the degradation trend of the to-be-detected system when the to-be-detected system is powered on and powered off each time. The system failure can be predicted by analyzing the degradation trend before the to-be-detected system fails. In addition, even if the to-be-detected system is weakly degraded, the degradation trend of the to-be-detected system can be reflected through the subtle difference between the real-time voltage oscillation signal and the reference voltage oscillation signal, and the real-time detection of the weak failure can be realized. That is, the present scheme can not only detect weak failure, but also predict system failure.

[0061] The above embodiment describes how to detect weak system failure and predict system failure. In the present embodiment, how to determine the degradation trend of the to-be-detected system is described in more detail, as shown in the following. Figure 3

[0062] S301, determining a real-time oscillation frequency according to the real-time voltage oscillation signal.

[0063] Specifically, the voltage oscillation period is first determined according to the real-time voltage oscillation signal, and then the real-time oscillation frequency is determined according to the voltage oscillation period.

[0064] The oscillation frequency is the number of times of voltage oscillation per second, and the voltage oscillation period is the time required for voltage to oscillate once.

[0065] Optionally, the voltage sensor can be linked with an oscilloscope. After the real-time voltage oscillation signal is transmitted to the oscilloscope by the voltage sensor, the oscilloscope can display the real-time voltage oscillation signal in the form of two-dimensional image coordinates. The oscillation duration of the real-time voltage oscillation signal and the oscillation frequency of the real-time voltage oscillation signal are determined by searching the coordinates. The oscillation duration is divided by the oscillation frequency to obtain the time required for each oscillation, that is, the voltage oscillation period. The reciprocal of the voltage oscillation period is the real-time oscillation frequency.

[0066] S302, determining a reference oscillation frequency according to the reference voltage oscillation signal corresponding to the detection loop of the to-be-detected system.

[0067] Optionally, the way of determining the reference oscillation frequency according to the reference voltage oscillation signal corresponding to the detection loop of the to-be-detected system is similar to the way of determining the real-time oscillation frequency according to the real-time voltage oscillation signal in the above step S301, which will not be described here. ​

[0068] Optionally, the reference oscillation frequency of the system to be detected may also be directly obtained by checking the nameplate of the system to be detected.

[0069] S303 : Determine the degradation trend of the system to be detected according to the real-time oscillation frequency and the reference oscillation frequency.

[0070] Specifically, the degradation trend of the system to be detected may be determined according to the ratio of the real-time oscillation frequency to the reference oscillation frequency.

[0071] Among them, the ratio of the real-time oscillation frequency to the reference oscillation frequency is related to the degree of degradation of the system to be detected. The higher the degree of degradation of the system to be detected, the smaller the ratio. That is, the ratio of the real-time oscillation frequency to the reference oscillation frequency will become smaller and smaller over time, and the real-time oscillation frequency will be less than or equal to the reference oscillation frequency.

[0072] Optionally, the real-time oscillation frequency is divided by the reference oscillation frequency to obtain a number less than or equal to 1 and greater than or equal to 0. The closer the number is to 0, the more serious the degradation of the system to be detected is, and the closer the number is to 1, the milder the degradation of the system to be detected is.

[0073] It should be noted that the degradation of the system to be detected is essentially the change of equivalent inductance, equivalent capacitance, equivalent resistance, etc. in the circuit due to the degradation of the components in the system to be detected. The changes in equivalent inductance, equivalent capacitance, equivalent resistance, etc. will cause the change of the natural oscillation frequency during transient switching of the circuit (i.e., the real-time oscillation frequency). Specifically, the more serious the degradation of the components, the lower the natural oscillation frequency during transient switching. Therefore, the degradation trend of the system to be detected can be judged based on the natural oscillation frequency during transient switching of the circuit. The relationship between the natural oscillation frequency and the equivalent inductance, equivalent capacitance, and equivalent resistance is specifically expressed as the following formula (1):

[0074] F=(1 / LC-R 2 / 4L 2 ) 1 / 2

[0075] Among them, F is the natural oscillation frequency, L is the equivalent inductance, C is the equivalent capacitance, and R is the equivalent resistance.

[0076] The above embodiment first determines the real-time oscillation frequency based on the real-time voltage oscillation signal, then determines the reference oscillation frequency based on the reference voltage oscillation signal. Finally, the degradation trend of the system to be detected is determined based on the ratio of the real-time oscillation frequency to the reference oscillation frequency. Using this method, even if the system to be detected exhibits slight degradation, the real-time oscillation frequency will change, thereby determining the degradation trend of the system to be detected. Therefore, this method can detect subtle system faults and predict system failures based on the system degradation.

[0077] The above two embodiments explain in principle how to detect slight degradation of the system and predict faults, and the key component is the voltage sensor. In this embodiment, Figure 4 As shown in FIG, the structure of the voltage sensor is described in detail, including:

[0078] The voltage sensor of this embodiment is a voltage sensor with a capacitive coupling structure; the voltage sensor includes two upper and lower insulating plates, a coupling structure impedance and a voltage output port; the upper insulating plate is used to place the energized wire of the detection circuit, and the lower insulating plate is used to place the metal sheet that senses the real-time voltage oscillation signal of the energized wire; one end of the coupling structure impedance is connected to the metal sheet, and the other end of the coupling structure impedance is connected to the voltage output port; the real-time voltage oscillation signal sensed by the metal sheet is transmitted to the voltage output port through the coupling structure impedance.

[0079] Optional, such as Figure 4 As shown, the voltage sensor includes an upper insulating plate 1 for placing the energized wire 2 of the detection circuit; a lower insulating plate 3 for placing a metal sheet 4 for sensing the real-time voltage oscillation signal of the energized wire 2; a coupling structure impedance 5, which is a fixed value. For example, in this solution, the resistance of the coupling structure impedance can be 50 ohms; a voltage output port 6, which is used to transmit the real-time voltage oscillation signal to the outside. For example, when the voltage output port 6 is connected to an oscilloscope, the voltage output port 6 can input the real-time voltage oscillation signal to the oscilloscope for display; a ground wire 7, which is connected to the voltage output port 6; one end of the coupling structure impedance 5 is connected to the metal sheet 4, and the other end is connected to the voltage output port.

[0080] The above embodiment describes in detail the composition structure of the voltage sensor. When the system degrades or fails, the voltage sensor designed in this solution can detect slight system degradation, greatly improving the accuracy of fault detection. The voltage sensor does not need to be connected to the circuit and does not need to change the original circuit of the system to be detected, making the detection more accurate. In addition, the voltage sensor is placed above or below the detection circuit of the system to be detected, making it more convenient to use.

[0081] In order to more comprehensively demonstrate this solution, this embodiment provides an optional method for system fault perception, such as Figure 5 As shown:

[0082] S501 , obtaining a real-time voltage oscillation signal collected by a voltage sensor placed between detection circuits of the system to be detected when the system to be detected is powered on or off.

[0083] The detection circuit is the circuit where the source and drain corresponding to the switching device in the system to be detected are located.

[0084] S502: Determine a voltage oscillation period according to the real-time voltage oscillation signal.

[0085] S503: Determine a real-time oscillation frequency according to the voltage oscillation period.

[0086] S504 , determining a reference oscillation frequency according to a reference voltage oscillation signal corresponding to the detection circuit of the system to be detected.

[0087] S505 : Determine the degradation trend of the system to be detected according to the ratio of the real-time oscillation frequency to the reference oscillation frequency.

[0088] S506: Detect faults of the system to be detected based on the degradation trend of the system to be detected.

[0089] Optionally, the system to be detected may be a DC to AC inverter and / or a DC to DC power supply circuit, such as Figure 6 As shown in the figure, a fault detection principle of a DC-AC inverter is demonstrated. The system to be detected contains three detection circuits with source and drain. A voltage sensor is placed between each detection circuit to collect real-time voltage oscillation signals of the three detection circuits in the system, that is, it is possible to detect the degradation trend of the system to be detected and predict faults of the system to be detected.

[0090] Optional, such as Figure 7 As shown, a fault detection principle of a DC-DC power supply circuit is demonstrated. The system to be detected includes a detection circuit with a source and a drain. A voltage sensor is placed between the detection circuits to collect the real-time voltage oscillation signal of the detection circuit in the system, that is, the degradation trend of the system to be detected can be detected and the fault of the system to be detected can be predicted.

[0091] The specific process of the above S501-S506 can be found in the description of the above method embodiment. The implementation principles and technical effects are similar and will not be repeated here.

[0092] It should be understood that, although the steps in the flowcharts of the above embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts of the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0093] Based on the same inventive concept, embodiments of the present application also provide a system fault sensing device for implementing the aforementioned system fault sensing method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations in one or more embodiments of the system fault sensing device provided below can be found in the above-described limitations on the system fault sensing method and will not be further elaborated here.

[0094] In one embodiment, Figure 8 As shown, a system fault sensing device 8 is provided, comprising: a signal acquisition module 80, a trend determination module 81 and a fault sensing module 82, wherein:

[0095] The signal acquisition module 80 is used to obtain a real-time voltage oscillation signal collected by a voltage sensor placed between detection circuits of the system to be detected when the system to be detected is powered on and off; wherein the detection circuit is the circuit where the source and drain electrodes corresponding to the switching devices in the system to be detected are located;

[0096] A trend determination module 81 is configured to determine a degradation trend of the system to be detected based on the real-time voltage oscillation signal and a reference voltage oscillation signal corresponding to the detection circuit of the system to be detected;

[0097] The fault sensing module 82 is used to sense faults in the system to be detected based on the degradation trend of the system to be detected.

[0098] In another embodiment, Figure 9 As shown above Figure 8 The trend determination module 81 in further includes:

[0099] A first frequency acquisition unit 810 is configured to determine a real-time oscillation frequency according to the real-time voltage oscillation signal;

[0100] The second frequency acquisition unit 811 is used to determine the reference oscillation frequency according to the reference voltage oscillation signal corresponding to the detection circuit of the system to be detected;

[0101] The trend determination unit 812 is configured to determine the degradation trend of the system to be detected according to the real-time oscillation frequency and the reference oscillation frequency.

[0102] In another embodiment, the above Figure 9 The first frequency acquisition unit 810 in is specifically configured to:

[0103] The voltage oscillation period is determined according to the real-time voltage oscillation signal; and the real-time oscillation frequency is determined according to the voltage oscillation period.

[0104] In another embodiment, the above Figure 9 The medium trend determination unit 812 is specifically used for:

[0105] The degradation trend of the system to be detected is determined according to the ratio of the real-time oscillation frequency to the reference oscillation frequency.

[0106] In another embodiment, the voltage sensor is a voltage sensor with a capacitive coupling structure; the voltage sensor includes two upper and lower insulating plates, a coupling structure impedance and a voltage output port; wherein the upper insulating plate is used to place the energized wire of the detection circuit, and the lower insulating plate is used to place a metal sheet that senses the real-time voltage oscillation signal of the energized wire; one end of the coupling structure impedance is linked to the metal sheet, and the other end of the coupling structure impedance is connected to the voltage output port; the real-time voltage oscillation signal sensed by the metal sheet is transmitted to the voltage output port through the coupling structure impedance.

[0107] In one embodiment, the system to be detected includes a DC-to-AC inverter and / or a DC-to-DC power supply circuit.

[0108] Each module in the aforementioned transmission system fault sensing device may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor within a computer device in the form of hardware, or may be stored in a computer device memory in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0109] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 10 As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface, the display unit and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a system fault perception method is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device casing, or an external keyboard, touchpad or mouse.

[0110] Those skilled in the art will understand that Figure 10 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0111] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0112] Acquire a real-time voltage oscillation signal collected by a voltage sensor placed between detection circuits of the system to be detected when the system to be detected is powered on or off; wherein the detection circuit is the circuit where the source and drain electrodes corresponding to the switching device in the system to be detected are located;

[0113] Determine the degradation trend of the system to be detected based on the real-time voltage oscillation signal and the reference voltage oscillation signal corresponding to the detection circuit of the system to be detected;

[0114] According to the degradation trend of the system to be detected, fault perception is performed on the system to be detected.

[0115] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0116] Determine the real-time oscillation frequency according to the real-time voltage oscillation signal;

[0117] Determining a reference oscillation frequency based on a reference voltage oscillation signal corresponding to a detection circuit of the system to be detected;

[0118] The degradation trend of the system to be detected is determined according to the real-time oscillation frequency and the reference oscillation frequency.

[0119] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0120] Determine the voltage oscillation period according to the real-time voltage oscillation signal;

[0121] According to the voltage oscillation period, the real-time oscillation frequency is determined.

[0122] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0123] The degradation trend of the system to be detected is determined according to the ratio of the real-time oscillation frequency to the reference oscillation frequency.

[0124] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0125] The voltage sensor is a voltage sensor with a capacitive coupling structure; the voltage sensor includes two upper and lower insulating plates, a coupling structure impedance and a voltage output port; the upper insulating plate is used to place the energized wire of the detection circuit, and the lower insulating plate is used to place the metal sheet that senses the real-time voltage oscillation signal of the energized wire; one end of the coupling structure impedance is connected to the metal sheet, and the other end of the coupling structure impedance is connected to the voltage output port; the real-time voltage oscillation signal sensed by the metal sheet is transmitted to the voltage output port through the coupling structure impedance.

[0126] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0127] The system to be detected includes a DC-to-AC inverter and / or a DC-to-DC power supply circuit.

[0128] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0129] Acquire a real-time voltage oscillation signal collected by a voltage sensor placed between detection circuits of the system to be detected when the system to be detected is powered on or off; wherein the detection circuit is the circuit where the source and drain electrodes corresponding to the switching device in the system to be detected are located;

[0130] Determine the degradation trend of the system to be detected based on the real-time voltage oscillation signal and the reference voltage oscillation signal corresponding to the detection circuit of the system to be detected;

[0131] According to the degradation trend of the system to be detected, fault perception is performed on the system to be detected.

[0132] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0133] Determine the real-time oscillation frequency according to the real-time voltage oscillation signal;

[0134] Determining a reference oscillation frequency based on a reference voltage oscillation signal corresponding to a detection circuit of the system to be detected;

[0135] The degradation trend of the system to be detected is determined according to the real-time oscillation frequency and the reference oscillation frequency.

[0136] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0137] Determine the voltage oscillation period according to the real-time voltage oscillation signal;

[0138] According to the voltage oscillation period, the real-time oscillation frequency is determined.

[0139] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0140] The degradation trend of the system to be detected is determined according to the ratio of the real-time oscillation frequency to the reference oscillation frequency.

[0141] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0142] The voltage sensor is a voltage sensor with a capacitive coupling structure; the voltage sensor includes two upper and lower insulating plates, a coupling structure impedance and a voltage output port; the upper insulating plate is used to place the energized wire of the detection circuit, and the lower insulating plate is used to place the metal sheet that senses the real-time voltage oscillation signal of the energized wire; one end of the coupling structure impedance is connected to the metal sheet, and the other end of the coupling structure impedance is connected to the voltage output port; the real-time voltage oscillation signal sensed by the metal sheet is transmitted to the voltage output port through the coupling structure impedance.

[0143] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0144] The system to be detected includes a DC-to-AC inverter and / or a DC-to-DC power supply circuit.

[0145] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0146] Acquire a real-time voltage oscillation signal collected by a voltage sensor placed between detection circuits of the system to be detected when the system to be detected is powered on or off; wherein the detection circuit is the circuit where the source and drain electrodes corresponding to the switching device in the system to be detected are located;

[0147] Determine the degradation trend of the system to be detected based on the real-time voltage oscillation signal and the reference voltage oscillation signal corresponding to the detection circuit of the system to be detected;

[0148] According to the degradation trend of the system to be detected, fault perception is performed on the system to be detected.

[0149] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0150] Determine the real-time oscillation frequency according to the real-time voltage oscillation signal;

[0151] Determining a reference oscillation frequency based on a reference voltage oscillation signal corresponding to a detection circuit of the system to be detected;

[0152] The degradation trend of the system to be detected is determined according to the real-time oscillation frequency and the reference oscillation frequency.

[0153] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0154] Determine the voltage oscillation period according to the real-time voltage oscillation signal;

[0155] According to the voltage oscillation period, the real-time oscillation frequency is determined.

[0156] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0157] The degradation trend of the system to be detected is determined according to the ratio of the real-time oscillation frequency to the reference oscillation frequency.

[0158] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0159] The voltage sensor is a voltage sensor with a capacitive coupling structure; the voltage sensor includes two upper and lower insulating plates, a coupling structure impedance and a voltage output port; the upper insulating plate is used to place the energized wire of the detection circuit, and the lower insulating plate is used to place the metal sheet that senses the real-time voltage oscillation signal of the energized wire; one end of the coupling structure impedance is connected to the metal sheet, and the other end of the coupling structure impedance is connected to the voltage output port; the real-time voltage oscillation signal sensed by the metal sheet is transmitted to the voltage output port through the coupling structure impedance.

[0160] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0161] The system to be detected includes a DC-to-AC inverter and / or a DC-to-DC power supply circuit.

[0162] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0163] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0164] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A system fault perception method, characterized in that: The method comprises: Acquiring a real-time voltage oscillation signal collected by a voltage sensor placed between detection circuits of the system to be detected when the system to be detected is powered on and off; wherein the detection circuit is the circuit where the source and drain electrodes corresponding to the switching device in the system to be detected are located, and the system to be detected includes a DC-to-AC inverter and / or a DC-to-DC power supply circuit; determining a degradation trend of the system to be detected based on the real-time voltage oscillation signal and a reference voltage oscillation signal corresponding to a detection circuit of the system to be detected; Performing fault sensing on the system to be detected based on a degradation trend of the system to be detected; In which, the voltage sensor is a voltage sensor with a capacitive coupling structure; the voltage sensor includes two upper and lower insulating plates, a coupling structure impedance and a voltage output port; wherein, the upper insulating plate is used to place the energized wire of the detection circuit, and the lower insulating plate is used to place a metal sheet that senses the real-time voltage oscillation signal of the energized wire; one end of the coupling structure impedance is connected to the metal sheet, and the other end of the coupling structure impedance is connected to the voltage output port; the real-time voltage oscillation signal sensed by the metal sheet is transmitted to the voltage output port through the coupling structure impedance.

2. The method according to claim 1, characterized in that Determining the degradation trend of the system to be detected based on the real-time voltage oscillation signal and a reference voltage oscillation signal corresponding to the detection circuit of the system to be detected includes: determining a real-time oscillation frequency according to the real-time voltage oscillation signal; determining a reference oscillation frequency according to a reference voltage oscillation signal corresponding to a detection circuit of the system to be detected; The degradation trend of the system to be detected is determined according to the real-time oscillation frequency and the reference oscillation frequency.

3. The method according to claim 2, characterized in that The step of determining the real-time oscillation frequency according to the real-time voltage oscillation signal includes: determining a voltage oscillation period according to the real-time voltage oscillation signal; The real-time oscillation frequency is determined according to the voltage oscillation period.

4. The method according to claim 2, characterized in that Determining the degradation trend of the system to be detected based on the real-time oscillation frequency and the reference oscillation frequency includes: The degradation trend of the system to be detected is determined according to the ratio of the real-time oscillation frequency to the reference oscillation frequency.

5. The method according to claim 1, wherein The performing fault sensing on the system to be detected according to the degradation trend of the system to be detected includes: Fault perception is performed on the system to be detected based on the magnitude relationship between the degradation trend of the system to be detected and the fault threshold.

6. A system fault sensing device, characterized in that: The device comprises: A signal acquisition module, configured to acquire a real-time voltage oscillation signal collected by a voltage sensor placed between detection circuits of the system to be detected when the system to be detected is powered on and off; wherein the detection circuit is a circuit where the source and drain electrodes corresponding to the switching device in the system to be detected are located, and the system to be detected includes a DC-to-AC inverter and / or a DC-to-DC power supply circuit; a trend determination module, configured to determine a degradation trend of the system to be detected based on the real-time voltage oscillation signal and a reference voltage oscillation signal corresponding to a detection circuit of the system to be detected; a fault sensing module, configured to sense faults of the system to be detected based on a degradation trend of the system to be detected; In which, the voltage sensor is a voltage sensor with a capacitive coupling structure; the voltage sensor includes two upper and lower insulating plates, a coupling structure impedance and a voltage output port; wherein, the upper insulating plate is used to place the energized wire of the detection circuit, and the lower insulating plate is used to place a metal sheet that senses the real-time voltage oscillation signal of the energized wire; one end of the coupling structure impedance is connected to the metal sheet, and the other end of the coupling structure impedance is connected to the voltage output port; the real-time voltage oscillation signal sensed by the metal sheet is transmitted to the voltage output port through the coupling structure impedance.

7. The method according to claim 6, characterized in that The trend determination module includes: A first frequency acquisition unit, configured to determine a real-time oscillation frequency according to the real-time voltage oscillation signal; A second frequency acquisition unit, configured to determine a reference oscillation frequency according to a reference voltage oscillation signal corresponding to a detection circuit of the system to be detected; The trend determination unit is used to determine the degradation trend of the system to be detected according to the real-time oscillation frequency and the reference oscillation frequency.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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