Device and method for measuring dynamic contact pressure of tulip contact of circuit breaker

Abstract

The invention relates to a device and a method for measuring dynamic contact pressure of a tulip contact of a circuit breaker, and the device comprises a dynamic contact pressure detection module, a data conversion and transmission module and an application terminal which are connected in sequence. The dynamic contact pressure detection module comprises an equipment shell, a pressure sensor and a radial telescopic structure, the pressure sensor and the radial telescopic structure are arranged in the equipment shell, the pressure sensor is circumferentially arranged between the equipment shell and the radial telescopic structure and is used for dynamically measuring pressure signal data of the circuit breaker tulip contact, and the radial telescopic structure is used for reducing through stretching and retracting; the data conversion and transmission module is used for transmitting the pressure signal data to the application terminal in real time, and the application terminal is used for evaluating the pressure signal data of the circuit breaker tulip contact based on a convolutional neural calculation model to obtain an evaluation result. Compared with the prior art, the method has the advantages of real-time detection, long-term monitoring, predictive analysis and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage switchgear fault detection and state evaluation, and in particular to a device and method for measuring the dynamic contact pressure of a circuit breaker plum blossom contact. Background Art

[0002] High-voltage switchgear plays a key role in power systems. It is typically used for relay protection, monitoring, and measurement equipment, and is essential for ensuring the safe and stable operation of power grids. Circuit breakers, as core components of high-voltage switchgear, are primarily responsible for automatically disconnecting faulty circuits, preventing accidents from escalating, and ensuring the safe operation of power grids and electrical equipment. The plum blossom contacts are crucial components in circuit breakers, responsible for achieving electrical connection and disconnection. Their contact state directly impacts the performance and reliability of the circuit breaker.

[0003] Over time, plum blossom contacts may malfunction. Common causes include arc burns, mechanical wear, contamination, and oxidation. Arc burns typically occur during the opening and closing of circuit breakers, causing high-temperature arcs to burn near the contacts, melting and oxidizing the metal material on the contact surface, increasing surface resistance and affecting conductivity. Frequent opening and closing actions can cause contact surface wear, reduced contact area, and increased contact resistance, potentially leading to poor contact. In addition, contacts exposed to the air are susceptible to dust, moisture, and contaminants, forming an oxide layer or dirt layer, increasing contact resistance, and even inducing arc discharge, leading to circuit breaker failure.

[0004] Currently, common methods for inspecting circuit breaker contacts include regular manual inspection, infrared thermal imaging, and contact resistance measurement. While regular manual inspection is intuitive, it is time-consuming and labor-intensive, making it difficult to detect problems promptly. Infrared thermal imaging can detect contact temperature distribution and identify temperature anomalies, but it cannot directly reflect changes in contact pressure and resistance. Contact resistance measurement can directly reflect contact wear and contamination, but it requires power outages, which can affect power continuity. Traditional inspection methods lack intelligent and information-based management, preventing real-time data collection, storage, and analysis, remote monitoring, and abnormality alarms. Summary of the Invention

[0005] The purpose of the present invention is to provide a circuit breaker plum blossom contact dynamic contact pressure measuring device and measuring method for accurately evaluating the contact state of the circuit breaker plum blossom contact.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A device for measuring the dynamic contact pressure of a circuit breaker plum blossom contact comprises: a dynamic contact pressure detection module, a data conversion and transmission module, and an application terminal connected in sequence. The dynamic contact pressure detection module comprises a device housing, a pressure sensor disposed within the device housing, and a radial telescopic structure. The pressure sensor is circumferentially arranged between the device housing and the radial telescopic structure and is used to dynamically measure pressure signal data of the circuit breaker plum blossom contact. The radial telescopic structure is used to change its diameter by telescoping. The data conversion and transmission module is used to transmit the pressure signal data to the application terminal in real time. The application terminal is used to evaluate the pressure signal data of the circuit breaker plum blossom contact based on a convolutional neural computing model to obtain an evaluation result.

[0008] Furthermore, the pressure sensor is a resistive pressure sensor.

[0009] Furthermore, the radial telescopic structure includes a slide base assembly and a bottom sliding assembly radially arranged on the slide base assembly. The slide base assembly is provided with a first groove for installing the pressure sensor in the first groove through a bolt. The bottom sliding assembly is used to drive the slide base assembly to extend and retract by sliding to achieve diameter change.

[0010] Furthermore, the chute base assembly includes a plurality of chute bases, and the chute bases are arranged in a circumferential distribution.

[0011] Furthermore, the bottom sliding assembly includes a base, a base slide, a cam plate and a tray arranged at the bottom of the cam plate, the base, cam plate and tray are connected by bearings, the base is provided with a plurality of radially distributed second grooves, the base slide is provided with a plurality of strips, which are installed in the second grooves for reciprocating in the radial direction, driving the slide base assembly to extend and retract in the lateral direction, the cam plate is provided with a plurality of arc openings, the arc openings are used to limit the diameter change range of the base slide, the cam plate and the base slide are clamped by a movable connecting rod, and the movable connecting rod drives the base slide to move radially in the second groove by rotating the tray.

[0012] Furthermore, the data conversion and transmission module includes a data receiving unit, an internal data conversion unit and a wireless transmission unit connected in sequence.

[0013] The data receiving unit is used to receive the pressure signal data,

[0014] The internal data conversion unit is used to perform internal conversion and processing on the pressure signal data to obtain pressure conversion data.

[0015] The wireless transmission unit is used to transmit the pressure conversion data to the application terminal.

[0016] Furthermore, the application terminal includes a receiving and pre-processing unit, a database unit, and a processing and evaluation unit.

[0017] The receiving and pre-processing unit is used to receive the pressure signal data in real time and perform denoising pre-processing using a moving average filtering method;

[0018] The database unit is used to store the pre-processed pressure signal data in a database;

[0019] The processing and evaluation unit is used to perform stress evaluation based on the database using a convolutional neural computing model and output an evaluation result.

[0020] Furthermore, the processing and evaluation unit includes an anomaly detection module, a pressure analysis module, a contact level evaluation module, a warning module and an operation report generation module.

[0021] The anomaly detection module is used to detect pressure peaks, valleys and abnormal fluctuations based on the pressure signal data within a certain period of time in the database;

[0022] The pressure analysis module is used to analyze and process the pressure signal within a certain period of time in the database to obtain the average pressure value, standard deviation and variance, and trend analysis results, wherein the trend analysis results are predicted using a time series analysis method or a regression analysis method;

[0023] The contact level assessment module is used to assess the compression force level of the circuit breaker plum blossom contacts using a convolutional neural computing model based on the real-time received pressure signal data, and obtain corresponding compression force levels, including normal, slightly loose, moderately loose, and severely loose;

[0024] The warning module is used to compare the results of the anomaly detection module and the pressure analysis module with a preset safety threshold to determine whether the preset safety threshold is exceeded. If so, a warning is issued; if not, no warning is issued;

[0025] The operation report generation module is used to integrate the results of the anomaly detection module, the pressure analysis module, the contact level assessment module and the warning module to generate an operation report.

[0026] The present invention also provides a method for measuring the dynamic contact pressure of a circuit breaker contact according to the above-mentioned device, comprising the following steps:

[0027] Insert the dynamic contact pressure detection module into the circuit breaker contact, rotate the tray, and thereby drive the movable link to move along the arc-shaped opening path in the cam plate. The other end of the movable link drives the base slide bar to move radially in the second groove, so that the slide groove base can be expanded and contracted in the horizontal direction to adapt to the size of the circuit breaker contact;

[0028] The pressure sensor collects the pressure signal data in real time and transmits it to the application terminal through the data conversion and transmission module;

[0029] The application terminal receives the pressure signal data in real time, performs denoising preprocessing using a moving average filtering method, and stores the data in a database. The application terminal also uses a convolutional neural computing model in a contact level evaluation module to evaluate the pressing force level of the pressure signal data of the circuit breaker plum blossom contact to obtain the corresponding pressing force level. The moving average filtering method operation expression is:

[0030] y i =f i +e i i=1,2,...,N

[0031] Where y i is the pressure signal data, f i is the deterministic component, e i is the random component, and N is the number of signals.

[0032] Furthermore, the steps performed by the application terminal also include:

[0033] An anomaly detection module is used to detect the pressure signal data within a certain period of time in the database to detect pressure peaks, valleys and abnormal fluctuations;

[0034] Using a pressure analysis module, the pressure signal within a certain period of time in the database is analyzed and processed to obtain an average pressure value, a standard deviation and a variance, and a trend analysis result, wherein the trend analysis result is predicted using a time series analysis method or a regression analysis method;

[0035] Using a warning module, compare the results of the anomaly detection module and the pressure analysis module with a preset safety threshold to determine whether the preset safety threshold is exceeded. If so, a warning is issued; otherwise, no warning is issued;

[0036] An operation report generation module is used to integrate the results of the anomaly detection module, the pressure analysis module, the contact level assessment module and the warning module to generate an operation report.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] (1) The present invention combines Internet of Things technology to obtain the pressure signal data of the circuit breaker's plum blossom contacts in real time through a dynamic contact pressure detection module, and performs calculations and analysis through an application terminal, thereby accurately evaluating the contact status of the circuit breaker's plum blossom contacts, ensuring accurate monitoring of the circuit breaker status, timely discovering problems, and improving the reliability and safety of the equipment.

[0039] (2) The test device of the present invention uses a slotted structure and bolts to securely connect the pressure sensor, device housing, and elongated chute base, ensuring system stability and reliability. The cam plate is designed with three arc-shaped openings to allow the device housing to move flexibly in the radial direction, meeting the measurement requirements of different diameters and improving the system's applicability and flexibility.

[0040] (3) The application terminal of the present invention can not only perform calculation and analysis on real-time data, but also analyze and process the data stored in the database, detect abnormal data, abnormal fluctuations and trend analysis, etc., so that the detection device has the advantages of real-time detection, long-term monitoring, predictive analysis, etc., which can bring convenience and efficiency improvement to equipment maintenance and management.

[0041] (4) The present invention introduces a filtering algorithm to process the contact pressure detection data, and realizes denoising based on the difference in scale of the wavelet coefficients of the signal and noise, thereby effectively improving the detection accuracy of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic structural diagram of the measuring device of the present invention;

[0043] Figure 2 Schematic diagram of the structure of the dynamic contact pressure detection module of the present invention;

[0044] Figure 3 It is a structural schematic diagram of the radial telescopic structure of the present invention;

[0045] Figure 4 This is a schematic structural diagram of the base and base slider of the present invention;

[0046] Figure 5 It is a structural schematic diagram of the cam plate and the tray of the present invention;

[0047] Figure 6 Schematic diagram of the measurement method of the present invention;

[0048] In the figure, 1. Circuit breaker plum blossom contact; 2. Dynamic contact pressure detection module; 21. Equipment housing; 22. Base slide; 23. Base; 24. Cam plate; 25. Tray; 26. Pressure sensor; 27. Second groove; 28. Slide base; 29. ​​First groove; 3. Data conversion and transmission module; 4. Application terminal. DETAILED DESCRIPTION

[0049] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0050] Example 1

[0051] This embodiment provides a circuit breaker plum blossom contact dynamic contact pressure measurement device, such as Figure 1 As shown, the device includes a dynamic contact pressure detection module 2, a data conversion and transmission module 3 and an application terminal 4 which are connected in sequence.

[0052] like Figure 2 As shown, the dynamic contact pressure detection module 2 includes a device housing 21 with a semi-dome and a cylinder combined structure, a high-precision resistive pressure sensor 26 and a radial telescopic structure, as shown in FIG. Figure 3 As shown, the radial telescopic structure includes a slide base assembly and a bottom sliding assembly radially arranged on the slide base assembly. The slide base assembly includes a plurality of slide bases 28 arranged along a circumferential distribution. The bottom sliding assembly includes a base 23, a base slide 22, a cam plate 24, and a tray 25 arranged at the bottom of the cam plate 24. Specifically, the connection method of the various components in the dynamic contact pressure detection module 2 is as follows: the pressure sensor 26 is fixed on the inner side of the device housing 1 and is tightly connected to the telescopic structure. The pressure sensor 26 is fixedly installed along the radial direction of the column between the device housing 21 and the slide base 28 of the telescopic structure. In this embodiment, the number of slide bases 28 is three and they are arranged along a circumferential distribution. A first groove 29 is provided on the slide base 28 for placing the pressure sensor 26, so that the three are firmly connected together by bolts, so that the overall structure is reliably connected.

[0053] like Figure 4 As shown, in the radial telescopic structure, the base 23 is provided with a second groove 27, which is distributed radially on the base 23. The base 23 is provided with three base slides 22. The base slides 22 can reciprocate in the second groove 27 and achieve diameter change by telescoping to adapt to the measurement of plum blossom contacts of different sizes. Figure 5 As shown, the cam disc 24 is a flat circular disc with three arc-shaped openings. These arc-shaped openings are used to limit the range of diameter change of the base slide 22. The cam disc 24 is connected to the base slide 22 via a movable connecting rod. The base 23 and the tray 25 are connected via bearings for easy rotation. By rotating the tray 25, the movable connecting rod moves along the arc-shaped opening path in the cam disc 24. The other end of the movable connecting rod drives the base slide 22 to move radially within the second groove 27, causing the slide base 28 to expand and contract in the horizontal direction, thereby expanding the diameter to the required diameter required for the measurement of the plum blossom contact 1.

[0054] The data conversion and transmission module 3 includes a data receiving unit for the pressure sensor 26, an internal data conversion unit, and a Bluetooth-based wireless transmission unit for the application terminal 4. This module obtains real-time pressure signal data from the dynamic contact pressure detection module 2 via the data receiving unit. After internal conversion and processing by the internal data conversion unit, the data is transmitted to the application terminal 4 via the wireless transmission unit. The Bluetooth-based wireless transmission unit is a low-power, high-speed transmission unit that ensures stable and secure operation of the device.

[0055] The application terminal 4 includes a receiving and preprocessing unit, a database unit with a built-in SQLite local database, and a processing and evaluation unit. The receiving and preprocessing unit should support multiple communication protocols and adapt to different types of Bluetooth devices and interface requirements. It is used to obtain contact pressure data in real time from the data conversion and transmission module 3, and preprocess the data, such as using moving average filtering for preliminary denoising. The moving average method can filter out random fluctuations in the data, smooth the data curve, and reduce the impact of random errors. This method is simple to calculate, has fewer floating-point operations, can effectively suppress white noise and pulse interference, and has a high smoothing effect. This method is suitable for online real-time processing and is widely used in engineering practice, which helps to improve the detection accuracy of the system. Its basic principle is as follows: decompose the dynamic test data y(t) into a deterministic component f(t) and a random component x(t). Among them, the deterministic component f(t) represents the effective signal, and the random component x(t) represents the noise, that is, x(t) = e(t), so the dynamic pressure test data from the plum blossom contact can be expressed as:

[0056] y i =f i +e i i=1,2,...,N

[0057] It can be considered that the non-stationary data {y i} is close to a steady change, and the local average processing method is used to reduce {e i}The unreasonable fluctuation of data caused by this method. All data intervals are processed locally using the same method one by one, and relatively smooth overall measurement data results can be obtained. i}, thereby minimizing the random errors in stress test data.

[0058] The SQLite local database pressure data in the database unit includes two types of contact pressure data: real-time pressure values ​​and historical pressure data. Real-time pressure values ​​include the specific value of the current contact pressure, and historical pressure data includes the pressure change trend over a period of time.

[0059] The processing and evaluation unit includes an anomaly detection module, a pressure analysis module, a contact level assessment module, a warning module, and an operation report generation module. The anomaly detection module detects two types of anomaly detection data: pressure peaks and valleys, and abnormal fluctuations. Pressure peaks and valleys record the highest and lowest contact pressure values, while abnormal fluctuations identify sudden changes and instabilities in contact pressure. The pressure analysis module analyzes pressure data to generate pressure analysis data, including average pressure values, standard deviations, variances, and trend analysis. The average pressure value is used to calculate the average pressure over a period of time. The standard deviation and variance are used to assess the fluctuation range and dispersion of pressure data. Trend analysis includes predicting future pressure trends through methods such as time series analysis and regression analysis. This unit's long-term historical data includes long-term comparative evaluation with the device's own historical data. Categorized data storage involves categorizing data based on basic information such as time, location, operator, circuit breaker model, and contact type, and performing comparative analysis of data from different circuit breaker contact types.

[0060] The contact level assessment module uses a convolutional neural computing model to assess the compression force level of the circuit breaker contact 1 based on the real-time received pressure signal data, and obtains the corresponding compression force level. The training steps of the convolutional neural computing model include:

[0061] (1) Obtain the compression force signal of the circuit breaker plum blossom contact and perform sliding filtering on it;

[0062] (2) According to the variation range of the plum blossom contact pressing force measurement value, different contact state levels are set and a data set is constructed. For example, the pressing force can be divided into four levels: "normal", "slightly loose", "moderately loose" and "severely loose";

[0063] (3) Construct a CNN network, use the data set for training and learning, and ensure that the data distribution of each level is balanced. Construct a convolutional neural network model that can identify the contact state level corresponding to different plum blossom contact pressure values;

[0064] (4) Encapsulate the convolutional neural computing model and load it to the application terminal 4.

[0065] The warning module generates warning reports, including high-voltage warnings, abnormal fluctuation warnings, and maintenance advisory warnings. A high-voltage warning is issued immediately when contact pressure exceeds a preset safety threshold. An abnormal fluctuation warning is issued when contact pressure fluctuates excessively, potentially causing abnormal wear or failure of the circuit breaker's contact 1. A maintenance advisory warning issues urgent maintenance recommendations when a serious anomaly or potential hazard is detected, advising immediate equipment inspection and maintenance.

[0066] The Operation Report Generation Module integrates the results of the Anomaly Detection Module, Pressure Analysis Module, Exposure Level Assessment Module, and Warning Module to generate an Operation Report. These reports include annual, quarterly, and monthly reports, specifically covering overall pressure changes, maximum, minimum, average, and trend values; recording and analyzing all detected abnormal pressure events and corresponding treatment measures; and summarizing and evaluating data from the entire reporting period, assessing the long-term status trends of the equipment and providing improvement recommendations to support equipment maintenance plans.

[0067] Example 2

[0068] This embodiment provides a method for measuring the dynamic contact pressure of a circuit breaker plum blossom contact. The method performs a measurement operation based on the measuring device in embodiment 1, such as Figure 6 As shown, the measurement method includes the following steps:

[0069] S1. Select the corresponding model of dynamic contact pressure detection module 2 according to the switch cabinet circuit breaker plum blossom contact 1 to be repaired and adjust it to zero;

[0070] S2. Insert the dynamic contact pressure detection module 2 into the circuit breaker plum blossom contact 1, adjust the measurement diameter to meet the detection requirements, and collect real-time pressure data;

[0071] S3, the data conversion and transmission module 3 receives, converts and sends the pressure data to the application terminal 4, the application terminal 4 receives, converts and processes the data, and uploads the data to the mobile device's SQLite local database;

[0072] S4, application terminal 4 integrates the real-time pressure detection results and long-term data, displays the real-time pressure detection data and the revised predicted value to the user for comparison and generates a comprehensive operation report, and automatically sends a warning report to the user when necessary;

[0073] S5. The user can obtain the status data of the circuit breaker contact 1 from the application terminal 4 at any time, and then adjust the circuit breaker operation and maintenance strategy.

[0074] The rest is the same as in Example 1.

[0075] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0076] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A circuit breaker plum blossom contact dynamic contact pressure measuring device, characterized in that: include: A dynamic contact pressure detection module (2), a data conversion and transmission module (3), and an application terminal (4) are connected in sequence. The dynamic contact pressure detection module (2) includes a device housing (21), a pressure sensor (26) and a radial telescopic structure arranged inside the device housing (21). The pressure sensor (26) is circumferentially arranged between the device housing (21) and the radial telescopic structure and is used to dynamically measure the pressure signal data of the circuit breaker plum blossom contact (1). The radial telescopic structure is used to change the diameter by telescoping. The data conversion and transmission module (3) is used to transmit the pressure signal data to the application terminal (4) in real time. The application terminal (4) is used to evaluate the pressure signal data of the circuit breaker plum blossom contact (1) based on a convolutional neural computing model to obtain an evaluation result.

2. A circuit breaker plum blossom contact dynamic contact pressure measuring device according to claim 1, characterized in that: The pressure sensor (26) is a resistance pressure sensor.

3. A circuit breaker plum blossom contact dynamic contact pressure measuring device according to claim 1, characterized in that: The radial telescopic structure includes a slide base assembly and a bottom sliding assembly radially arranged on the slide base assembly. The slide base assembly is provided with a first groove (29) for installing the pressure sensor (26) in the first groove (29) by means of a bolt. The bottom sliding assembly is used to drive the slide base assembly to telescope by sliding to achieve diameter change.

4. A circuit breaker plum blossom contact dynamic contact pressure measuring device according to claim 3, characterized in that: The chute base assembly comprises a plurality of chute bases (28), and the chute bases (28) are arranged in a circumferential distribution.

5. The circuit breaker plum blossom contact dynamic contact pressure measuring device according to claim 3, characterized in that: The bottom sliding assembly includes a base (23), a base slide (22), a cam disc (24) and a tray (25) arranged at the bottom of the cam disc (24); the base (23), the cam disc (24) and the tray (25) are connected by bearings; the base (23) is provided with a plurality of radially distributed second grooves (27); the base slide (22) is provided with a plurality of strips, which are installed in the second grooves (27) for radial reciprocating motion to drive the slide base assembly to extend and retract in the transverse direction; the cam disc (24) is provided with a plurality of arc-shaped openings, which are used to limit the diameter change range of the base slide (22); the cam disc (24) and the base slide (22) are connected by a movable connecting rod; by rotating the tray (25), the movable connecting rod drives the base slide (22) to move radially in the second groove (27).

6. A circuit breaker plum blossom contact dynamic contact pressure measuring device according to claim 1, characterized in that: The data conversion and transmission module (3) comprises a data receiving unit, an internal data conversion unit and a wireless transmission unit connected in sequence, The data receiving unit is used to receive the pressure signal data, The internal data conversion unit is used to perform internal conversion and processing on the pressure signal data to obtain pressure conversion data. The wireless transmission unit is used to transmit the pressure conversion data to the application terminal (4).

7. A circuit breaker plum blossom contact dynamic contact pressure measuring device according to claim 1, characterized in that: The application terminal (4) comprises a receiving and pre-processing unit, a database unit, a processing and evaluation unit, The receiving and pre-processing unit is used to receive the pressure signal data in real time and perform denoising pre-processing using a moving average filtering method; The database unit is used to store the pre-processed pressure signal data in a database; The processing and evaluation unit is used to perform stress evaluation based on the database using a convolutional neural computing model and output an evaluation result.

8. A circuit breaker plum blossom contact dynamic contact pressure measuring device according to claim 7, characterized in that: The processing and evaluation unit includes an anomaly detection module, a pressure analysis module, a contact level evaluation module, a warning module and an operation report generation module. The anomaly detection module is used to detect pressure peaks, valleys and abnormal fluctuations based on the pressure signal data within a certain period of time in the database; The pressure analysis module is used to analyze and process the pressure signal within a certain period of time in the database to obtain the average pressure value, standard deviation and variance, and trend analysis results, wherein the trend analysis results are predicted using a time series analysis method or a regression analysis method; The contact level evaluation module is used to evaluate the compression force level of the circuit breaker plum blossom contact (1) using a convolutional neural computing model for the pressure signal data received in real time, and obtain corresponding compression force levels, including normal, slightly loose, moderately loose and severely loose; The warning module is used to compare the results of the anomaly detection module and the pressure analysis module with a preset safety threshold to determine whether the preset safety threshold is exceeded. If so, a warning is issued; if not, no warning is issued; The operation report generation module is used to integrate the results of the anomaly detection module, the pressure analysis module, the contact level assessment module and the warning module to generate an operation report.

9. A method for measuring the dynamic contact pressure of a circuit breaker plum blossom contact according to any one of claims 1 to 8, characterized in that: The following steps are involved: Inserting the dynamic contact pressure detection module (2) into the circuit breaker plum blossom contact (1), rotating the tray (25), thereby driving the movable link to move along the arc-shaped opening path in the cam plate (24), and the other end of the movable link drives the base slide (22) to move radially in the second groove (27), so that the slide groove base (28) can be expanded and contracted in the transverse direction to adapt to the size of the circuit breaker plum blossom contact (1); The pressure sensor (26) collects the pressure signal data in real time and transmits the data to the application terminal (4) through the data conversion and transmission module (3); The application terminal (4) receives the pressure signal data in real time, performs denoising preprocessing using a moving average filtering method, stores the data in a database, and uses a convolutional neural computing model in a contact level evaluation module to evaluate the pressing force level of the pressure signal data of the circuit breaker plum blossom contact (1) to obtain the corresponding pressing force level, wherein the moving average filtering method operation expression is: y i =f i +e i i=1,2,...,N Where y i is the pressure signal data, f i is the deterministic component, e i is the random component, and N is the number of signals.

10. A measuring method according to claim 9, characterized in that: The steps performed by the application terminal (4) further include: An anomaly detection module is used to detect the pressure signal data within a certain period of time in the database to detect pressure peaks, valleys and abnormal fluctuations; Using a pressure analysis module, the pressure signal within a certain period of time in the database is analyzed and processed to obtain an average pressure value, a standard deviation and a variance, and a trend analysis result, wherein the trend analysis result is predicted using a time series analysis method or a regression analysis method; Using a warning module, compare the results of the anomaly detection module and the pressure analysis module with a preset safety threshold to determine whether the preset safety threshold is exceeded. If so, a warning is issued; otherwise, no warning is issued; An operation report generation module is used to integrate the results of the anomaly detection module, the pressure analysis module, the contact level assessment module and the warning module to generate an operation report.

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