Miniature circuit breaker detection method and detection device thereof

Abstract

The invention discloses a miniature circuit breaker detection method and system. The method comprises the steps that whether the difference value between the sequence length of a second time sequence and the sequence length of a certain first time subsequence is smaller than a preset length threshold value or not is judged; if the length is not smaller than the preset length threshold value, vibration signals of the circuit breaker in a preset time period are acquired, and the vibration signals are sorted based on the at least one first time subsequence to obtain at least one vibration signal sequence; selecting at least one target vibration signal from the at least one vibration signal sequence according to the at least one electromagnet coil current sub-sequence, and performing feature extraction on the at least one target vibration signal to obtain a vibration feature corresponding to the at least one target vibration signal; and comparing each vibration characteristic with a preset vibration characteristic database, and determining the working state of the circuit breaker. Accurate and real-time monitoring of the state of the circuit breaker is achieved, and the efficiency and reliability of fault diagnosis are remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit breaker detection, and particularly relates to a detection method and a detection device for a miniature circuit breaker. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal or abnormal circuit conditions. When dangerous situations such as a short circuit or a sharp increase in voltage occur in the circuit where the power circuit breaker is located, the power circuit breaker will be triggered to work, causing an open circuit phenomenon in the circuit where the power circuit breaker is located. Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers according to their usage scope. The division between high and low voltages is relatively blurred. Generally, those above 3 kV are called high-voltage electrical appliances. During the use of a circuit breaker, a energy storage spring wire is an indispensable component.

[0003] Since there are a large amount of ambient noise, equipment noise, and mechanical vibrations before the circuit breaker makes an operating sound, and there are aftershock vibration signals after the moving and static contacts of the circuit breaker collide, these interfering vibration signals are likely to cause deviations in the analysis results, thereby resulting in inaccurate final circuit breaker fault detection results. Summary of the Invention

[0004] The present invention provides a detection method and a detection device for a miniature circuit breaker, which are used to solve the technical problem that interfering vibration signals are likely to cause deviations in the analysis results, thereby resulting in inaccurate final circuit breaker fault detection results.

[0005] In a first aspect, the present invention provides a detection method for a miniature circuit breaker, including:

[0006] Obtaining the electromagnetic coil current values at each acquisition moment within a preset time period after the closing moment of the circuit breaker, and sorting the electromagnetic coil current values in chronological order to obtain an electromagnetic coil current sequence;

[0007] According to a preset current threshold, using a preset partitioning strategy to partition the electromagnetic coil current sequence to obtain at least one electromagnetic coil current subsequence, and partitioning at least one corresponding first time subsequence according to the at least one electromagnetic coil current subsequence;

[0008] Obtaining a second time sequence between the closing moment and the opening moment of the circuit breaker, and determining whether the difference between the sequence length of the second time sequence and the sequence length of a certain first time subsequence is less than a preset length threshold, where the certain first time subsequence is any one of the at least one first time subsequences;

[0009] If it is not less than the preset length threshold, obtain the vibration signals of the circuit breaker within a preset time period, and sort each vibration signal based on the at least one first time subsequence to obtain at least one vibration signal sequence;

[0010] Select at least one target vibration signal from the at least one vibration signal sequence according to the at least one electromagnet coil current subsequence, and perform feature extraction on the at least one target vibration signal to obtain vibration features corresponding to the at least one target vibration signal;

[0011] Compare each vibration feature with a preset vibration feature database to determine the working state of the circuit breaker.

[0012] In a second aspect, the present invention provides a small circuit breaker detection device, including:

[0013] An acquisition module configured to acquire the electromagnet coil current values at each acquisition moment within a preset time period after the closing moment of the circuit breaker, and sort the electromagnet coil current values based on the time sequence to obtain an electromagnet coil current sequence;

[0014] A division module configured to divide the electromagnet coil current sequence according to a preset current threshold and a preset division strategy to obtain at least one electromagnet coil current subsequence, and divide at least one corresponding first time subsequence according to the at least one electromagnet coil current subsequence;

[0015] A judgment module configured to acquire a second time sequence between the closing moment and the opening moment of the circuit breaker, and judge whether the difference between the sequence length of the second time sequence and the sequence length of a certain first time subsequence is less than a preset length threshold, where the certain first time subsequence is any one of the at least one first time subsequences;

[0016] A sorting module configured to, if it is not less than the preset length threshold, obtain the vibration signals of the circuit breaker within a preset time period, and sort each vibration signal based on the at least one first time subsequence to obtain at least one vibration signal sequence;

[0017] An extraction module configured to select at least one target vibration signal from the at least one vibration signal sequence according to the at least one electromagnet coil current subsequence, and perform feature extraction on the at least one target vibration signal to obtain vibration features corresponding to the at least one target vibration signal;

[0018] A comparison module configured to compare each vibration feature with a preset vibration feature database to determine the working state of the circuit breaker.

[0019] In a third aspect, an electronic device is provided, which includes: at least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and when the instructions are executed by the at least one processor, the at least one processor is enabled to perform the steps of the small circuit breaker detection method according to any embodiment of the present invention.

[0020] In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the program instructions are executed by a processor, the processor is enabled to perform the steps of the small circuit breaker detection method according to any embodiment of the present invention.

[0021] The small circuit breaker detection method and its detection device of the present application break through the limitations of single-parameter monitoring in traditional circuit breaker state detection through spatio-temporal correlation analysis of current subsequences and vibration signals. By time-aligning and dividing subsequences of the electromagnetic coil current sequence and the vibration signal sequence, mechanical faults (such as contact jamming, mechanism wear) or electrical faults (such as coil overheating, short-circuit current impact) within a preset time period after the circuit breaker is closed can be accurately located, avoiding misjudgment of a single signal source. And by combining synchronous acquisition, subsequence division, and matching mechanism of current-vibration signals within a preset time period, accurate and real-time monitoring of the circuit breaker state is achieved, significantly improving the efficiency and reliability of fault diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a flowchart of a small circuit breaker detection method provided by an embodiment of the present invention;

[0024] Figure 2 It is a structural block diagram of a small circuit breaker detection device provided by an embodiment of the present invention;

[0025] Figure 3 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figure 1 , which shows a flowchart of a method for detecting a miniature circuit breaker according to the present application.

[0028] As Figure 1 shown, the method for detecting a miniature circuit breaker specifically includes the following steps:

[0029] Step S101: Obtain the electromagnetic coil current values at each acquisition moment within a preset time period after the closing moment of the circuit breaker, and sort the electromagnetic coil current values in chronological order to obtain an electromagnetic coil current sequence.

[0030] Step S102: Divide the electromagnetic coil current sequence according to a preset current threshold and a preset division strategy to obtain at least one electromagnetic coil current subsequence, and divide at least one corresponding first time subsequence according to the at least one electromagnetic coil current subsequence.

[0031] In this step, each electromagnetic coil current in the electromagnetic coil current sequence is compared with the current threshold in chronological order; when a certain electromagnetic coil current and another electromagnetic coil current are both greater than the current threshold, the certain electromagnetic coil current is used as the first electromagnetic coil current in the electromagnetic coil current subsequence, and the other electromagnetic coil current is used as the last electromagnetic coil current in the electromagnetic coil current subsequence to obtain an electromagnetic coil current subsequence, that is, at least one electromagnetic coil current subsequence is obtained, where the acquisition moment of a certain electromagnetic coil current is earlier than the acquisition moment of the other electromagnetic coil current.

[0032] It should be noted that obtain the first acquisition moment corresponding to the first electromagnetic coil current and the second acquisition moment corresponding to the second electromagnetic coil current in a certain electromagnetic coil current subsequence, where the first electromagnetic coil current is the first electromagnetic coil current in a certain electromagnetic coil current subsequence, and the second electromagnetic coil current is the last electromagnetic coil current in a certain electromagnetic coil current subsequence; divide all the acquisition moments between the first acquisition moment and the second acquisition moment into the same sequence to obtain a certain first time subsequence.

[0033] Step S103: Obtain the second time series between the closing moment and the opening moment of the circuit breaker, and determine whether the difference between the sequence length of the second time series and the sequence length of a certain first time subsequence is less than a preset length threshold, where the certain first time subsequence is any one of the at least one first time subsequences.

[0034] In a specific embodiment, after determining whether the difference between the sequence length of the second time series and the sequence length of a certain first time subsequence is less than the preset length threshold, if it is not less than the preset length threshold, directly determine that the circuit breaker is in a normal working state.

[0035] Step S104: If it is not less than the preset length threshold, obtain the vibration signals of the circuit breaker within a preset time period, and sort each vibration signal based on the at least one first time subsequence to obtain at least one vibration signal sequence.

[0036] In this step, sort each vibration signal based on the acquisition time, and align the sorted vibration signals with the at least one first time subsequence to obtain at least one vibration signal sequence.

[0037] Step S105: Select at least one target vibration signal from the at least one vibration signal sequence according to the at least one electromagnet coil current subsequence, and perform feature extraction on the at least one target vibration signal to obtain vibration features corresponding to the at least one target vibration signal.

[0038] In this step, align a certain electromagnet coil current subsequence with a certain vibration signal sequence based on the acquisition time, and use the vibration signal corresponding to the mutated electromagnet coil current in the certain electromagnet coil current subsequence as the target signal, where the current value of the mutated electromagnet coil current is greater than or less than the other electromagnet coil currents in a certain electromagnet coil current subsequence, and the other electromagnet coil currents are the electromagnet coil currents in a certain electromagnet coil current subsequence excluding the mutated electromagnet coil current; convert each target vibration signal into a vibration parameter sequence in chronological order; perform denoising processing on the vibration parameter sequence to obtain a denoised parameter sequence; perform envelope spectrum analysis on the denoised parameter sequence to obtain vibration features; and process the vibration features through a mutation signal starting point extraction algorithm to obtain accurate vibration features.

[0039] Step S106: Compare each vibration feature with a pre-set vibration feature database to determine the working state of the circuit breaker.

[0040] In summary, the method of the present application breaks through the limitations of single-parameter monitoring in traditional circuit breaker state detection through the spatio-temporal correlation analysis of the current subsequence and the vibration signal. By aligning the time of the electromagnet coil current sequence and the vibration signal sequence and dividing the subsequence, mechanical faults (such as contact jamming and mechanism wear) or electrical faults (such as coil overheating and short-circuit current impact) of the circuit breaker within a preset time period after closing can be accurately located, avoiding misjudgment of a single signal source. Moreover, by combining the synchronous acquisition, subsequence division, and matching mechanism of the current-vibration signal within the preset time period, accurate and real-time monitoring of the circuit breaker state is achieved, significantly improving the efficiency and reliability of fault diagnosis.

[0041] Please refer to Figure 2 , which shows a structural block diagram of a small circuit breaker detection device of the present application.

[0042] As Figure 2 shown, the small circuit breaker detection device 200 includes an acquisition module 210, a division module 220, a judgment module 230, a sorting module 240, an extraction module 250, and a comparison module 260.

[0043] Among them, the acquisition module 210 is configured to acquire the electromagnet coil current values at each acquisition moment within a preset time period after the closing moment of the circuit breaker, and sort the electromagnet coil current values based on the time sequence to obtain an electromagnet coil current sequence; the division module 220 is configured to divide the electromagnet coil current sequence according to a preset current threshold and a preset division strategy to obtain at least one electromagnet coil current subsequence, and divide at least one corresponding first time subsequence according to the at least one electromagnet coil current subsequence; the judgment module 230 is configured to acquire a second time sequence between the closing moment and the opening moment of the circuit breaker, and judge whether the difference between the sequence length of the second time sequence and the sequence length of a certain first time subsequence is less than a preset length threshold, where the certain first time subsequence is any one of the at least one first time subsequences; the sorting module 240 is configured to, if it is not less than the preset length threshold, acquire the vibration signal of the circuit breaker within the preset time period, and sort each vibration signal based on the at least one first time subsequence to obtain at least one vibration signal sequence; the extraction module 250 is configured to select at least one target vibration signal from the at least one vibration signal sequence according to the at least one electromagnet coil current subsequence, and extract features of the at least one target vibration signal to obtain vibration features corresponding to the at least one target vibration signal; the comparison module 260 is configured to compare each vibration feature with a pre-set vibration feature database to determine the working state of the circuit breaker.

[0044] It should be understood thatFigure 2 The various modules described in Figure 1 correspond to the respective steps in the method described in the reference Figure 2 . Thus, the operations, features, and corresponding technical effects described above for the method also apply to

[0045] the various modules in

[0046] and will not be elaborated here.

[0047] In some other embodiments, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored. When the program instructions are executed by a processor, the processor is caused to execute the small circuit breaker detection method in any of the above method embodiments;

[0048] As an implementation manner, the computer-readable storage medium of the present invention stores computer-executable instructions, and the computer-executable instructions are set as:

[0047] Obtain the electromagnetic coil current values at each acquisition moment within a preset time period after the closing moment of the circuit breaker, and sort the electromagnetic coil current values in chronological order to obtain an electromagnetic coil current sequence;

[0048] According to a preset current threshold, use a preset partitioning strategy to partition the electromagnetic coil current sequence to obtain at least one electromagnetic coil current subsequence, and partition at least one corresponding first time subsequence according to the at least one electromagnetic coil current subsequence;

[0049] Obtain a second time sequence between the closing moment and the opening moment of the circuit breaker, and determine whether the difference between the sequence length of the second time sequence and the sequence length of a certain first time subsequence is less than a preset length threshold, where the certain first time subsequence is any one of the at least one first time subsequences;

[0050] If it is not less than the preset length threshold, obtain the vibration signal of the circuit breaker within the preset time period, and sort the vibration signals based on the at least one first time subsequence to obtain at least one vibration signal sequence;

[0051] Select at least one target vibration signal from the at least one vibration signal sequence according to the at least one electromagnetic coil current subsequence, and perform feature extraction on the at least one target vibration signal to obtain vibration features corresponding to the at least one target vibration signal;

[0052] Compare each vibration feature with a pre-set vibration feature database to determine the working state of the circuit breaker.

[0053] A computer-readable storage medium may include a storage program area and a storage data area. Among them, the storage program area may store an operating system and application programs required for at least one function; the storage data area may store data created according to the use of the miniature circuit breaker detection device, etc. In addition, the computer-readable storage medium may include a high-speed random access memory, and may also include a memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some embodiments, the computer-readable storage medium may optionally include a memory remotely provided with respect to the processor, and these remote memories may be connected to the miniature circuit breaker detection device through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0054] Figure 3 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention, as Figure 3 shown, the device includes: a processor 310 and a memory 320. The electronic device may further include: an input device 330 and an output device 340. The processor 310, the memory 320, the input device 330, and the output device 340 may be connected through a bus or other means, Figure 3 taking connection through a bus as an example. The memory 320 is the above-mentioned computer-readable storage medium. The processor 310 executes various functional applications and data processing of the server by running non-volatile software programs, instructions, and modules stored in the memory 320, that is, implements the miniature circuit breaker detection method in the above method embodiment. The input device 330 may receive input digital or character information, and generate key signal inputs related to user settings and function controls of the miniature circuit breaker detection device. The output device 340 may include a display device such as a display screen.

[0055] The above electronic device may execute the method provided by the embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method. For technical details not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.

[0056] As an implementation manner, the above electronic device is applied to a miniature circuit breaker detection device and is used for a client, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can:

[0057] Obtain the electromagnetic coil current values at each acquisition moment within a preset time period after the closing moment of the circuit breaker, and sort the electromagnetic coil current values in chronological order to obtain an electromagnetic coil current sequence;

[0058] Divide the electromagnet coil current sequence according to a preset current threshold using a preset division strategy to obtain at least one electromagnet coil current subsequence, and divide at least one corresponding first time subsequence according to the at least one electromagnet coil current subsequence;

[0059] Obtain a second time series between the closing moment and the opening moment of the circuit breaker, and determine whether the difference between the sequence length of the second time series and the sequence length of a certain first time subsequence is less than a preset length threshold, where the certain first time subsequence is any one of the at least one first time subsequences;

[0060] If it is not less than the preset length threshold, obtain the vibration signal of the circuit breaker within a preset time period, and sort each vibration signal based on the at least one first time subsequence to obtain at least one vibration signal sequence;

[0061] Select at least one target vibration signal from the at least one vibration signal sequence according to the at least one electromagnet coil current subsequence, and perform feature extraction on the at least one target vibration signal to obtain vibration features corresponding to the at least one target vibration signal;

[0062] Compare each vibration feature with a pre-set vibration feature database to determine the working state of the circuit breaker.

[0063] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course also by hardware. Based on such an understanding, the essence of the above technical solution or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of each embodiment or some parts of the embodiments.

[0064] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present invention.

Claims

1. A method for detecting a miniature circuit breaker, characterized in that, Including: Obtain the electromagnetic coil current values at each acquisition moment within a preset time period after the closing moment of the circuit breaker, and sort the electromagnetic coil current values in chronological order to obtain an electromagnetic coil current sequence; According to a preset current threshold, use a preset partitioning strategy to partition the electromagnetic coil current sequence to obtain at least one electromagnetic coil current subsequence, and partition at least one corresponding first time subsequence according to the at least one electromagnetic coil current subsequence; Obtain a second time sequence between the closing moment and the opening moment of the circuit breaker, and determine whether the difference between the sequence length of the second time sequence and the sequence length of a certain first time subsequence is less than a preset length threshold, where the certain first time subsequence is any one of the at least one first time subsequences; If it is not less than the preset length threshold, obtain the vibration signal of the circuit breaker within the preset time period, and sort the vibration signals based on the at least one first time subsequence to obtain at least one vibration signal sequence; Select at least one target vibration signal from the at least one vibration signal sequence according to the at least one electromagnetic coil current subsequence, and perform feature extraction on the at least one target vibration signal to obtain vibration features corresponding to the at least one target vibration signal; Compare each vibration feature with a preset vibration feature database to determine the working state of the circuit breaker.

2. The method for detecting a miniature circuit breaker according to claim 1, characterized in that, The step of using a preset partitioning strategy to partition the electromagnetic coil current sequence according to a preset current threshold to obtain at least one electromagnetic coil current subsequence includes: Compare each electromagnetic coil current in the electromagnetic coil current sequence with the current threshold in chronological order; When a certain electromagnetic coil current and another electromagnetic coil current are both greater than the current threshold, use the certain electromagnetic coil current as the first electromagnetic coil current in the electromagnetic coil current subsequence and the other electromagnetic coil current as the last electromagnetic coil current in the electromagnetic coil current subsequence to obtain an electromagnetic coil current subsequence, that is, obtain at least one electromagnetic coil current subsequence, where the acquisition moment of the certain electromagnetic coil current is earlier than the acquisition moment of the other electromagnetic coil current.

3. A method for detecting a miniature circuit breaker according to claim 1, characterized in that, The step of partitioning at least one corresponding first time subsequence according to the at least one electromagnetic coil current subsequence includes: Obtain the first acquisition moment corresponding to the first electromagnetic coil current and the second acquisition moment corresponding to the second electromagnetic coil current in a certain electromagnetic coil current subsequence, where the first electromagnetic coil current is the first electromagnetic coil current in the certain electromagnetic coil current subsequence and the second electromagnetic coil current is the last electromagnetic coil current in the certain electromagnetic coil current subsequence; Partition all acquisition moments between the first acquisition moment and the second acquisition moment into the same sequence to obtain a certain first time subsequence.

4. A method for detecting a miniature circuit breaker according to claim 1, characterized in that, After determining whether the difference between the sequence length of the second time series and the sequence length of a first time subsequence is less than a preset length threshold, the method further includes: If it is not less than the preset length threshold, it is directly determined that the circuit breaker is in a normal working state.

5. A method for detecting a miniature circuit breaker according to claim 1, characterized in that, The obtaining of the vibration signals of the circuit breaker within a preset time period and the sorting of each vibration signal based on the at least one first time subsequence to obtain at least one vibration signal sequence includes: Sorting each vibration signal based on the acquisition time, and aligning the sorted vibration signals with the at least one first time subsequence to obtain at least one vibration signal sequence.

6. The method for detecting a miniature circuit breaker according to claim 1, wherein The selecting of at least one target vibration signal from the at least one vibration signal sequence according to the at least one electromagnet coil current subsequence and the feature extraction of the at least one target vibration signal to obtain vibration features corresponding to the at least one target vibration signal includes: Aligning a certain electromagnet coil current subsequence with a certain vibration signal sequence based on the acquisition time, and using the vibration signal corresponding to the mutated electromagnet coil current in the certain electromagnet coil current subsequence as the target signal, where the current values of the mutated electromagnet coil current are all greater than or less than the other electromagnet coil currents in the certain electromagnet coil current subsequence, and the other electromagnet coil currents are the electromagnet coil currents in the certain electromagnet coil current subsequence excluding the mutated electromagnet coil current; Converting each target vibration signal into a vibration parameter sequence in chronological order; Performing denoising processing on the vibration parameter sequence to obtain a denoised parameter sequence; Performing envelope spectrum analysis on the denoised parameter sequence to obtain the vibration features; Processing the vibration features through a mutation signal starting point extraction algorithm to obtain accurate vibration features.

7. A miniature circuit breaker detection device, characterized in that, Including: An acquisition module configured to acquire the electromagnet coil current values at each acquisition time within a preset time period after the closing moment of the circuit breaker, and sort the electromagnet coil current values in chronological order to obtain an electromagnet coil current sequence; A division module configured to divide the electromagnet coil current sequence according to a preset current threshold by using a preset division strategy to obtain at least one electromagnet coil current subsequence, and divide at least one corresponding first time subsequence according to the at least one electromagnet coil current subsequence; A judgment module configured to acquire a second time series between the closing moment and the opening moment of the circuit breaker, and judge whether the difference between the sequence length of the second time series and the sequence length of a first time subsequence is less than a preset length threshold, where the first time subsequence is any one of the at least one first time subsequences; A sorting module configured to, if it is not less than the preset length threshold, acquire the vibration signals of the circuit breaker within a preset time period, and sort each vibration signal based on the at least one first time subsequence to obtain at least one vibration signal sequence; An extraction module, configured to select at least one target vibration signal from the at least one vibration signal sequence according to the at least one electromagnet coil current subsequence, and perform feature extraction on the at least one target vibration signal to obtain vibration features corresponding to the at least one target vibration signal; A comparison module, configured to compare each vibration feature with a preset vibration feature database to determine the working state of the circuit breaker.

8. An electronic device, characterized in that, Comprising: At least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, the method according to any one of claims 1 to 6 is implemented.

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