An electric energy metering box and a safety control system and control method thereof

Abstract

The application relates to the technical field of power equipment, in particular to an electric energy metering box and a safety control system and control method thereof. The electric energy metering box comprises a box body, an openable and closable box door and an internal electric meter module. A box door driving mechanism is connected to the box door and the box body and used for driving the closure of the box door. An opening door detection device is arranged at the joint of the box door and the box body and used for monitoring the opening start time stamp, the closure time stamp and the duration of the box door in real time; a control device is arranged in the box body and connected to the opening door detection device and the box door driving mechanism in signal connection, judges whether there is a power stealing risk, and controls the box door driving mechanism according to the judgment result. The opening door detection device is used for monitoring the opening duration of the box door of the electric energy metering box in real time, and the preset threshold and the intelligent evaluation mechanism are combined, so that whether there is a power stealing risk can be judged during the opening of the box door and corresponding measures can be taken, and the fairness and accuracy of the power metering process are ensured.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, specifically to an electricity metering box and its safety control system and control method. Background Technology

[0002] In modern multi-user electricity metering systems such as those in residential buildings, multiple electricity meters are typically integrated into a single electricity metering box. Users and staff need to periodically open the box to check meter readings or recharge electricity cards. However, this process presents a serious security risk: the meters may be maliciously tampered with or electricity may be stolen by criminals. Especially with frequent opening of the metering box, unprotected meters are vulnerable to unauthorized access, leading to electricity theft.

[0003] Currently, traditional electricity metering boxes primarily rely on physical locks and mechanical methods to ensure meter security. However, these traditional designs often neglect the protection needs when the box door is open. In actual use, electricity metering boxes frequently need to be opened and closed, especially during meter readings and card top-ups. This means that even with locks and security devices, it's impossible to prevent users or malicious individuals from taking advantage of the situation to tamper with or steal electricity. Existing electricity metering boxes typically lack real-time monitoring and intelligent response mechanisms, failing to promptly identify the risk of electricity theft when the box door is open, and also failing to provide sufficient automated security measures.

[0004] Currently, most electricity metering boxes on the market are still limited to simple mechanical protection, failing to incorporate intelligent monitoring and automated control systems. When the box door is illegally opened, they cannot provide timely warnings or automatically take protective measures. Furthermore, existing technologies largely fail to consider the impact of repeated opening and closing of the box door on the security of the electricity metering system, making the meter module vulnerable to tampering with meter data or electricity theft when exposed to the outside world.

[0005] Therefore, there is an urgent need for a new safety control system for electricity metering boxes that can not only monitor the opening status of the box door in real time, but also automatically take protective measures based on the actual risk assessment results. Summary of the Invention

[0006] The technical problem this invention aims to solve is that existing protection technologies for electricity metering boxes cannot effectively monitor the duration of door opening and lack an intelligent mechanism for assessing the risk of electricity theft. Traditional electricity metering boxes, during frequent door openings, fail to detect and assess the relationship between opening time and the risk of electricity theft in real time, resulting in the inability to promptly detect and prevent potential electricity theft.

[0007] (II) Technical Solution

[0008] To address the aforementioned technical problems, this invention provides an electricity metering box for multiple users, comprising: 1. an electricity metering box, including a box body, an openable and closable door, and an internal electricity meter module, further comprising:

[0009] A door drive mechanism connects the door and the box body, and is used to drive the door to close and maintain the closed state of the door.

[0010] A door opening detection device is installed at the junction of the door and the body of the container to monitor the door opening start time stamp, closing time stamp and duration in real time, and generate corresponding detection signals.

[0011] A control device is installed in the enclosure and is signal-connected to the door opening detection device and the door drive mechanism, respectively. It is used to receive the detection signal from the door opening detection device, determine whether there is a risk of electricity theft, and control the door drive mechanism according to the determination result.

[0012] Furthermore, the aforementioned electricity metering box also includes a first lock and a second lock, each independently installed on the box door, wherein:

[0013] The first lock is an externally operable authentication lock, containing a mechanical key cylinder exposed on the outside of the box door for easy user operation, such as recharging electricity cards. The design of this lock primarily ensures that users can easily open the electricity metering box to check meter readings or operate the electricity card when needed, while the external operability of the lock cylinder prevents unauthorized personnel from opening the box door.

[0014] The second door lock is an electromagnetically driven safety lock, including an electromagnet assembly and a locking pin, wherein the locking pin forms an interference fit with the locking hole at the door frame of the box.

[0015] The electromagnet assembly is connected to the control device via a signal. When a risk of electricity theft is detected, the control device first drives the cabinet door to a fully closed state, and then outputs a locking signal to cause the locking pin to extend into the locking hole, forming a mechanical lock.

[0016] The combination of these two locks ensures both ease of operation for users and enhanced security against electricity theft. Especially in situations of potential theft, the electromagnetic safety lock automatically activates, firmly locking the door and preventing any opportunity for tampering with the meter, thus improving the overall security of the electricity meter.

[0017] Furthermore, the electricity metering box also includes

[0018] A visual monitoring device, located on the outside of the enclosure and connected to the control device via signal, includes a wide-angle camera and an infrared supplementary light unit;

[0019] The wide-angle camera is fixedly connected to the enclosure, covering the area along the opening trajectory of the door. When the electricity metering box door is opened, the wide-angle camera can clearly record image data of the relevant area. Whether it's day or night, the infrared supplementary lighting unit ensures clear images even in low-light conditions. This monitoring system can record the operation of the electricity metering box in real time. If electricity theft or improper operation occurs, it can provide effective evidence for subsequent investigations, preventing perpetrators from denying their actions.

[0020] An audible and visual alarm device, signal-connected to the control device, is integrated externally into the enclosure. Upon detecting any abnormality or risk of electricity theft, the alarm is immediately triggered, emitting sound and flashing lights to provide immediate warning. This audible and visual alarm not only quickly attracts the attention of those nearby but also effectively deters electricity theft, serving as a preventative and deterrent measure.

[0021] The present invention also provides a safety control system for an electricity metering box, which is based on the electricity metering box described in any of the above claims and includes the following steps:

[0022] S1: The door opening detection device continuously collects the start timestamp t1 of the door opening action and calculates the continuous opening duration Δt in real time; by monitoring the door opening duration, the system can accurately capture each door opening situation, providing basic data for subsequent judgment of electricity theft risk.

[0023] S2: When Δt reaches the preset first threshold T1, execute:

[0024] The control device sends a locking command to the door drive mechanism and outputs a pulse signal to force the door to close to the closed state. Simultaneously, the wide-angle camera of the visual monitoring device is activated to continuously collect images of the door operation area. This process not only ensures the timely closing of the door, but also provides evidence for potential illegal operations through image acquisition.

[0025] S3: The door closure status is detected a second time by the door opening detection device. When the door is verified to be closed, the control device activates the electromagnetic drive component of the second door lock, driving the locking pin to embed into the locking hole of the box body, forming an irreversible mechanical lock.

[0026] When it is confirmed that the second door lock is in the locked state, the drive state of the door drive mechanism is released;

[0027] When the closure verification fails: the drive state of the door drive mechanism is maintained continuously, and the continuous closing action can prevent external personnel from forcibly stopping the closing.

[0028] S4: After the locking / closing action of the two door locks is triggered, the following actions are executed: the audible and visual alarm device is activated, a warning sound of a preset frequency is output, and the lights are controlled to flash;

[0029] The monitoring image data before the locking is retrieved, and the timestamp, GPS positioning information and locking force parameters are superimposed to generate an encrypted evidence file. The encrypted evidence file is then uploaded to the monitoring platform through the power line carrier communication module to achieve traceable evidence storage and sharing after the fact.

[0030] S5: Maintain the locked state until an unlock command is received from an authorized terminal, the command of which must include a dynamic verification code bound to the enclosure serial number;

[0031] When unlocking, the control device first cuts off the power to the electromagnetic latch and retracts the latch. After resetting, the door opening detection device re-enters the monitoring state.

[0032] Through this series of steps, the power metering box security control system of the present invention can achieve fully automated protection management, from real-time monitoring to evidence storage, and then to intelligent control and alarm feedback, comprehensively improving the security and anti-theft capabilities of the power metering box, greatly reducing the probability of electricity theft, and ensuring the fairness and accuracy of power metering.

[0033] According to one embodiment of the present invention, the first threshold T1 in step S2 is dynamically generated through the following steps:

[0034] (a) User behavior analysis:

[0035] Collect data on the duration and frequency of users' historical door opening operations;

[0036] Extract the temporal and frequency features of operational behaviors to construct a user behavior model;

[0037] The key to this process is that by analyzing users' historical usage data, the system can identify users' normal operating patterns and habits.

[0038] (b) Intelligent threshold calculation:

[0039] Based on the user behavior model, normal operating patterns are analyzed using machine learning algorithms.

[0040] By combining the statistical distribution of historical duration and the real-time frequency deviation, the first threshold T1 of adaptability is dynamically calculated; it can adjust the sensitivity of security protection response according to the behavioral characteristics of different users, avoiding false triggering or missed detection problems that may be caused by fixed thresholds.

[0041] (c) Dynamic optimization mechanism:

[0042] Regularly update the user behavior model and adjust the threshold generation rules based on the latest operational data;

[0043] When a behavior pattern deviates significantly from historical patterns, the system automatically increases the safety margin to strengthen the interlocking response, thereby further improving the system's security.

[0044] The above methods enable the electricity metering box to flexibly adjust the threshold according to the actual usage environment and user operation behavior, effectively preventing electricity theft and improving the system's reliability and responsiveness.

[0045] According to one embodiment of the present invention, in order to effectively avoid harm to users caused by misoperation and to ensure that the electricity metering box has higher fault tolerance when handling abnormal situations, the present invention adopts a phased locking process in the locking command to gradually guide the closing process of the box door, ensuring safety and not interfering with the user's normal operation.

[0046] The locking command in step S2 includes a phased locking process:

[0047] (a) First stage: Alert-based interlocking

[0048] When Δt reaches T1, the control device drives the door drive mechanism to close the door to the preset safe opening degree θ (θ=25° to 35°), and triggers the following operation:

[0049] Activate the audible and visual alarm device to the warning state;

[0050] Maintain the θ opening state for a preset waiting time τ (τ = 3 to 5 seconds);

[0051] The system alerts the user that the door is about to close and provides sufficient reaction time by setting a preset waiting time τ (3 to 5 seconds).

[0052] (b) Second stage: Forced locking

[0053] After the waiting time τ ends, regardless of whether the cabinet door has been manually accessed, execute:

[0054] The control device outputs a high-power pulse signal to drive the door drive mechanism to fully close the door.

[0055] After verifying the closed state through the door opening detection device, the electromagnetic locking component of the second door lock is immediately activated.

[0056] If a closure failure is detected, the audible and visual alarm device will be activated to the second alarm state.

[0057] By employing this phased interlocking process, this invention effectively improves the system's fault tolerance in the face of abnormal operations, ensuring the safety of the electricity metering box while preventing injury or discomfort caused by forced operations. This design allows the electricity metering box to provide efficient and safe protection while also responding flexibly to actual conditions, offering a more intelligent and user-friendly operating experience.

[0058] According to one embodiment of the present invention, in order to prevent false alarms caused by users forgetting to close the door or misoperation, the present invention adds a judgment logic after the warning locking stage. Through visual monitoring devices and intelligent image analysis technology, it intelligently determines whether there is a person in the operating area, thereby avoiding unnecessary alarms and locking operations.

[0059] Specifically, the following decision logic is added after the warning locking phase in step (a):

[0060] (a1) During the period of maintaining the θ opening state, the wide-angle camera of the visual monitoring device is used to acquire images of the operating area in real time;

[0061] Convolutional neural networks are used to analyze image data, calculate the probability of people being present, and determine the presence or absence of people.

[0062] (a2) When the system is determined to be unmanned, the sound and light alarm device shall be immediately terminated.

[0063] The control box door drive mechanism smoothly closes the box door to a fully closed state in a low torque mode (≤5N·m);

[0064] The second door lock's locking function must be disabled, and the first door lock must remain in a reversible open state.

[0065] When it is determined that someone is present, continue to execute the forced locking procedure in step (b).

[0066] Through the above methods, the present invention not only avoids false alarms caused by the door not being closed or minor misoperation, but also provides a more user-friendly and humanized user experience through intelligent human recognition and judgment mechanisms, and improves the reliability and accuracy of the system.

[0067] The present invention also provides a safety control system for an electricity metering box, configured in the aforementioned electricity metering box, comprising:

[0068] The time monitoring unit is configured to continuously collect the opening start time and closing time of the cabinet door, and calculate the duration of a single opening.

[0069] The risk assessment unit, connected to the time monitoring unit via a signal, is configured as follows:

[0070] The duration is compared with a preset baseline threshold.

[0071] When the duration exceeds the baseline threshold, a power theft risk assessment signal is generated;

[0072] The drive control unit is signal-connected to the risk assessment unit and the door drive mechanism, and is configured to output a locking command to the door drive mechanism in response to the electricity theft risk determination signal to forcibly lock the door.

[0073] Furthermore, the safety control system for the electricity metering box also includes:

[0074] The tamper detection module is connected to the drive control unit and is used to detect abnormal current fluctuations in the display circuit of the meter module. Based on the monitoring data, it generates a tamper judgment signal. The drive control unit responds to the tamper judgment signal first, interrupts the risk assessment signal, and outputs a locking command to the door drive mechanism to forcibly lock the door.

[0075] The present invention also provides a safety control method for an energy metering box based on the above-mentioned safety control system for energy metering boxes, which is executed by the above-mentioned safety control system for energy metering boxes and includes the following steps:

[0076] (1) The abnormal display circuit parameter change of the meter module is monitored in real time through the tamper detection module; when the preset tampering conditions are met, the door locking trigger command is immediately generated and the routine risk assessment process is interrupted.

[0077] (2) After generating the door locking trigger command, the door closing process skips the door opening duration reference threshold judgment logic and directly sends the door locking drive signal to the door drive mechanism to drive the door to close in a preset priority mode.

[0078] (3) Maintain the locked state of the cabinet door until an authorized unlocking command is received. The unlocking command must be verified through an independent security channel. After unlocking, reset the system to the initial monitoring state and clear the tampering event marker.

[0079] Through its integrated design, this system enables the electricity metering box to respond immediately to electricity theft and tampering, and to protect against these incidents with optimal security strategies. Specifically, when tampering is detected, the system prioritizes response and forcibly locks the box door, thereby preventing the tampering or theft of meter data. This system not only enhances the security of the electricity metering box but also improves management efficiency, ensures the fairness and accuracy of the electricity metering process, and provides reliable security and data support for relevant regulatory authorities.

[0080] (III) Beneficial Effects of the Invention: The present invention monitors the opening duration of the electricity metering box door in real time through a door opening detection device, and, combined with a preset threshold and intelligent evaluation mechanism, can accurately determine whether there is a risk of electricity theft during the door opening process. By promptly detecting potential electricity theft and automatically taking protective measures, the risk of tampering or electricity theft of the electricity metering box during opening is effectively avoided. Simultaneously, the intelligent control system of the present invention can automatically adjust the protection strategy according to the actual situation, improving the security and reliability of the electricity metering box and ensuring the fairness and accuracy of the electricity metering process. Attached Figure Description

[0081] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0082] Figure 1 A three-dimensional structural diagram of an energy metering box with its door open, according to an embodiment of the present invention;

[0083] Figure 2 A three-dimensional structural diagram of an energy metering box with its door closed, according to an embodiment of the present invention;

[0084] Figure 3 This is a three-dimensional structural diagram of the door lock of an energy metering box according to an embodiment of the present invention;

[0085] Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure from another perspective.

[0086] Icons: 1. Box body; 11. Box door; 111. Door frame; 1111. Locking hole; 12. Box door drive mechanism; 13. Door opening detection device; 14. First door lock; 141. Key lock cylinder; 15. Second door lock; 151. Electromagnet assembly; 152. Locking bolt; 16. Magnetic lock; 2. Electricity meter module; 21. Electricity card slot; 3. Control device; 4. Visual monitoring device; 5. Audible and visual alarm device. Detailed Implementation

[0087] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Specific implementation examples:

[0089] like Figures 1 to 4 As shown, this embodiment provides an electricity metering box and an anti-theft method based on it. The electricity metering box is mainly installed in the public area of ​​residential buildings for multi-user electricity metering and recharging. In this embodiment, the electricity metering box is shared by six users and specifically includes a box body 1, an openable and closable door 11, and an internal meter module 2. The box body 1 is a cabinet-type box body, welded from 1.5mm thick cold-rolled steel plate, with a phosphated surface and coated with anti-rust paint. The openable and closable door 11 consists of two double-leaf doors 11 located on one side of the box body 1, with a door panel thickness of 2.0mm and sealing rubber strips along the edges. A magnetic lock 16 is also provided to reinforce the locking of the door 11. The middle door frame 111 is made of 6061-T6 high-strength aluminum alloy profile and is rigidly connected to the box body 1 by stainless steel bolts.

[0090] The internal meter module 2 is equipped with an electricity card insertion interface 21 and a tamper detection module. The tamper detection module is signal-connected to the drive control unit and is used to detect abnormal current fluctuations in the display circuit of the meter module 2. Based on the monitoring data, it generates a tamper judgment signal. The drive control unit responds to the tamper judgment signal first, interrupts the risk assessment signal, and outputs a locking command to the door 11 drive mechanism 12 to forcibly lock the door 11.

[0091] like Figure 1 As shown, a drive mechanism 12 is provided on the inner side of the top of the housing 1. Its drive end is connected to the housing door 11, which is used to drive the housing door 11 to close and maintain the closed state. The drive mechanism 12 can be a linear motor driven push rod mechanism, a gear and rack synchronous drive mechanism 12, or a gas spring assisted electromagnetic locking mechanism. In this embodiment, an arc-shaped push mechanism matching the opening and closing stroke of the housing door 11 is preferred. It includes a power unit composed of a 57 stepper motor and a planetary gearbox, as well as a chrome-plated arc-shaped guide rail. The arc-shaped push component is made of stainless steel. One end is fixedly connected to the inner wall of the housing door 11 through a universal joint, and the other end slides along the guide rail to realize stepless opening and closing control of the housing door 110-90°. The opening and closing speed can be adjusted between 5-15° / s.

[0092] like Figure 1 , 3and Figure 4 As shown, the door opening detection device 13 is located at the junction of the door 11 and the cabinet 1, and is used to monitor the opening timestamp, closing timestamp, and duration of the door 11 in real time. Specifically, the detection device includes a contact microswitch installed on the edge of the door frame 111 and the door body; pairs of infrared photoelectric sensors arranged on both sides of the door frame 111; and an auxiliary detection unit including a Hall sensor integrated at the door hinge, which, in conjunction with a permanent magnet, monitors the door opening angle in real time. The data is transmitted to the control device 3 via an SPI interface. The signals from multiple sensors are fused using Kalman filtering to generate a precise door opening duration Δt.

[0093] like Figures 1 to 4 As shown, the system also includes a first lock 14 and a second lock 15, each independently installed on the door 11. The exposed portion of the key cylinder 141 of the first lock 14 is made of brass and has a nickel-plated surface to enhance corrosion resistance. After inserting the authorized key, the user can unlock the door 11 by rotating it 120° clockwise to view the meter data or recharge the IC card.

[0094] The second door lock 15 is an electromagnetically driven safety lock, including an electromagnet assembly 151 and a locking pin 152. The locking pin 152 forms an interference fit with the locking hole 1111 at the door frame 111 of the box body 1.

[0095] Furthermore, such as Figure 1 , 2 As shown, the visual monitoring device 4 is located at the top center of the door frame 111 of the enclosure 1, and is fixed with an adjustable bracket. The visual monitoring device 4 includes a 2-megapixel wide-angle camera and an 850nm wavelength infrared supplementary light unit. The camera has a horizontal viewing angle of 130°, a vertical viewing angle of 75°, a minimum illumination of 0.001Lux@F1.6, a built-in 6mm focal length fixed-focus lens, and an IR-CUT dual filter automatic switching mechanism to ensure clear imaging day and night. The effective illumination distance is 8 meters, and intelligent supplementary light intensity control is achieved through PWM dimming.

[0096] The wide-angle camera's field of view covers the 0-90° trajectory area of ​​the door 11 when it opens. Data is stored locally on a TF card and can also be synchronously uploaded to the management platform via RS-485 bus.

[0097] The audible and visual alarm device 5 is integrated into the top of the door frame 111, and includes a ceramic speaker and a red and blue dual-color LED light strip. The LED light strip uses a constant current drive circuit and supports three modes: strobe, slow flash, and constant light, with a light intensity ≥2000mcd. When the alarm is triggered, the speaker outputs a preset sound effect sequence, and the LED flashes in an alternating red and blue pattern, with an effective warning distance of up to 30 meters.

[0098] The enclosure 1 has an independent power supply unit inside, which provides 12V / 2A DC power to the visual monitoring and audible and visual alarm device 5, and has built-in overvoltage, overcurrent and short circuit protection circuits.

[0099] Control device 3, the core of this anti-theft system, is located inside the enclosure 1. Integrated within a sealed compartment, the main control chip receives signals from the microswitch and infrared sensor of the door opening detection device 13 via a GPIO port. It calculates the opening duration Δt of the door 11 in real time (accuracy ±0.1 seconds) and monitors the current change rate ΔI / Δt of the electricity meter module 2. The video stream from the visual monitoring device 4 is input via a MIPI interface and analyzed by a lightweight AI model (such as YOLOv3-Tiny) embedded in the processor to identify abnormal tools (such as jumpers or pliers).

[0100] The stepper motor of the door 11 drive mechanism 12 is connected to the dedicated motor drive chip of the control device 3 via a four-wire system (pulse, direction, enable, ground) to receive PWM pulse signals to control the opening and closing angle and speed. The electromagnet assembly 151 of the two door lock is connected via a high-current MOSFET drive circuit. The control board outputs a 5V TTL level signal to trigger the MOSFET to conduct and supply a 24V / 5A working current to the electromagnetic coil.

[0101] The specific control method in this embodiment includes the following steps:

[0102] S1: Real-time monitoring and data acquisition

[0103] The door opening detection device 13 continuously collects the start timestamp t1 of the opening action of the box door 11 and calculates the continuous opening duration Δt in real time.

[0104] S2: Hierarchical interlocking trigger

[0105] When Δt reaches the preset first threshold T1, execute:

[0106] The control device 3 sends a locking command to the drive mechanism 12 of the door 11 and outputs a pulse signal to force the door 11 to close to the closed state.

[0107] The wide-angle camera of the visual monitoring device 4 is activated simultaneously to continuously capture images of the operation area of ​​the cabinet door 11 at a frame rate of 5fps.

[0108] S3: Lockout Verification and Security Locking

[0109] The door 11 is closed by secondary detection using the door opening detection device 13. When the verification closing displacement Δs ≤ 1mm:

[0110] The control device 3 activates the electromagnetic drive assembly of the second door lock 15, driving the locking pin 152 to embed into the locking hole 1111 of the housing 1 with a holding force of ≥80N, forming an irreversible mechanical lock.

[0111] If the closure verification fails (Δs>1mm), the spring energy storage assembly of the second door lock 15 is triggered to perform instantaneous impact locking.

[0112] S4: Linked Alarms and Data Forensics

[0113] Synchronously execute within 0.5 seconds after the locking action of the second door lock 15 is triggered:

[0114] The sound and light alarm device 5 is activated, outputting a preset warning sound at a sound pressure level of 105dB, and controlling the three-color LED lights to flash alternately at a frequency of 2Hz in red-blue dual colors.

[0115] Retrieve monitoring image data from 30 seconds prior to locking, overlay timestamps, GPS coordinates, and locking force parameters, and generate encrypted evidence files using the AES-256 algorithm;

[0116] The encrypted file is uploaded to the monitoring platform via the power line carrier communication module using OFDM modulation, with a carrier frequency band of 50kHz-150kHz.

[0117] S5: Lockout status maintained

[0118] Maintain the mechanical lock until a dynamic unlock command is received from an authorized terminal, the command containing a verification code bound to the serial number of enclosure 1 and the lock timestamp;

[0119] When unlocking, the control device 3 first cuts off the electromagnetic drive power of the second door lock 15, then releases the mechanical limit constraint of the first door lock 14, and resets to re-enter the monitoring state.

[0120] Furthermore, the first threshold T1 in step S2 is dynamically generated through the following steps:

[0121] (a) User behavior modeling stage:

[0122] Collect a user historical operation dataset D, containing N valid door opening records. Each record includes:

[0123] Opening start time t_start_i and closing time t_end_i (i=1,2,...,N);

[0124] The duration of a single activation is Δt_i = t_end_i - t_start_i;

[0125] Operation frequency feature f_i, which counts the average number of operations performed by a user during the daily [t_low, t_high] time period;

[0126] Construct a feature vector x_i = [Δt_i, f_i, day_type_i], where day_type_i is the code for weekdays / holidays (0 / 1);

[0127] (b) Machine learning training phase:

[0128] The random forest algorithm is used to train the classification model M, with the input feature vector x_i and the output normal / abnormal label y_i;

[0129] Model parameters: Maximum depth of decision tree ≤ 8, 70% of features are randomly selected for each tree;

[0130] The optimization objective is to maximize the F1 score, and the optimal parameters are selected through 5-fold cross-validation.

[0131] (c) Dynamic threshold calculation stage:

[0132] For the current user's data D_current from the last 7 days, calculate:

[0133] The average normal operation time, mu = (Δt_1 + Δt_2 + ... + Δt_n) / n;

[0134] Standard deviation sigma = sqrt( (Σ(Δt_i - mu)^2 ) / (n-1) );

[0135] Frequency deviation delta_f = |f_current - f_history| / f_history;

[0136] Dynamically generated thresholds:

[0137] The base threshold T_base = mu + 2*sigma;

[0138] If delta_f > 0.3, then T1 = T_base * 1.15;

[0139] Otherwise, T1 = T_base * (1 + delta_f);

[0140] (d) Online update mechanism:

[0141] The model is updated daily at midnight.

[0142] Retain 90% of the weight from historical data, and give 10% weight to newly added data;

[0143] If the model's prediction accuracy is less than 90% for three consecutive days, full data retraining will be triggered.

[0144] Threshold reset rule: On the 1st of each month, mu and sigma are recalculated based on the data from the previous month.

[0145] Furthermore, the locking instruction in step S2 includes a phased locking process:

[0146] (a) First stage: Alert-based interlocking

[0147] When Δt reaches T1, the control device 3 drives the door 11 drive mechanism 12 to close the door 11 to the preset safe opening degree θ (θ=25° to 35°), and triggers the following operation:

[0148] Activate the audible and visual alarm device to the warning state (red flashing at 1Hz, sound pressure level 80dB).

[0149] Maintain the θ opening state for a preset waiting time τ (τ = 3 to 5 seconds);

[0150] (b) Second stage: Forced locking

[0151] The control device 3 outputs a high-power pulse signal to drive the door 11 drive mechanism 12 to fully close the door 11 with a torque of ≥10 N·m;

[0152] After the door opening detection device 13 verifies the closed state (Δs≤1mm), the electromagnetic locking component of the second door lock 15 is immediately activated.

[0153] If a closure failure is detected (Δs>1mm), the backup interlocking mechanism and the upgraded audible and visual alarm mode will be activated simultaneously (red flashing at 2Hz, sound pressure level increased to 105dB).

[0154] Furthermore, the following decision logic is added after the warning locking phase in step (a):

[0155] (a1) During the period of maintaining the θ opening state, the wide-angle camera of the visual monitoring device 4 is used to collect images of the operation area in real time;

[0156] Convolutional neural networks are used to analyze image data, calculate the probability of people being present, and determine the presence or absence of people.

[0157] (a2) When the system is determined to be unmanned, the sound and light alarm device 5 shall be immediately terminated.

[0158] The control box door 11 drive mechanism 12 smoothly closes the box door 11 to a fully closed state in a low torque mode (≤5N·m);

[0159] The locking function of the second door lock 15 is prohibited from being activated, and the reversible open state of the first door lock 14 is maintained.

[0160] When it is determined that someone is present, continue to execute the forced locking procedure in step (b).

[0161] Furthermore, the method also includes the following steps:

[0162] When abnormal current fluctuations (ΔI / Δt>10A / s), continuous data verification failures, or physical protection triggering are detected in the meter display circuit, the following actions are executed immediately:

[0163] Interrupt routine monitoring and force the drive door 11 to close with a torque of ≥15 N·m.

[0164] The electromagnetic latch and the backup locking mechanism are activated simultaneously to form a double lock;

[0165] Trigger an upgraded audible and visual alarm (115dB, 5Hz red and blue strobe), start panoramic video recording from the camera, and generate an encrypted log containing tampering characteristics;

[0166] The latch is maintained until remote multi-factor authorization unlocking, which requires verification of dynamic certificates, biometrics, and physical keys.

[0167] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A safety control method for an electricity metering box, characterized in that, Based on the operation of an electricity metering box, the electricity metering box includes a box body, an openable and closable box door, a box door drive mechanism, a door opening detection device, a control device, a first door lock, a second door lock, a visual monitoring device, and an audible and visual alarm device. The box door drive mechanism connects the box door and the box body. The door opening detection device is located at the junction of the box door and the box body. The control device is signal-connected to the door opening detection device and the box door drive mechanism. The second door lock is signal-connected to the control device and includes an electromagnetic drive assembly and a locking pin. The box body has a locking hole for the locking pin to be inserted. The visual monitoring device includes a wide-angle camera. The method includes the following steps: S1: The door opening detection device continuously collects the start timestamp t1 of the door opening action and calculates the continuous opening duration Δt in real time; S2: When Δt reaches the preset first threshold T1, execute: The control device sends a locking command to the door drive mechanism and outputs a pulse signal to force the door to close to the closed state. The wide-angle camera of the visual monitoring device is activated simultaneously to continuously capture images of the door operation area. S3: The door closure status is detected a second time by the door opening detection device. When the door is verified to be closed, the control device activates the electromagnetic drive component of the second door lock, driving the locking pin to embed into the locking hole of the box body, forming an irreversible mechanical lock. When it is confirmed that the second door lock is in the locked state, the driving state of the door drive mechanism is released; When the closure verification fails: the drive state of the door drive mechanism is continuously maintained; S4: After the locking / closing action of the two door locks is triggered, the following actions are executed: the audible and visual alarm device is activated, a warning sound of a preset frequency is output, and the lights are controlled to flash; Retrieve monitoring image data before locking, and overlay timestamps, GPS positioning information and locking force parameters to generate encrypted evidence files; The encrypted evidence file is uploaded to the monitoring platform via the power line carrier communication module; S5: Maintain the locked state until an unlock command is received from an authorized terminal, the command of which must include a dynamic verification code bound to the enclosure serial number; When unlocking, the control device first cuts off the power to the electromagnetic latch and retracts the latch. After resetting, the door opening detection device re-enters the monitoring state.

2. The safety control method for an electricity metering box according to claim 1, characterized in that, The first threshold T1 in step S2 is dynamically generated through the following steps: (a) User behavior analysis: Collect data on the duration and frequency of users' historical door opening operations; Extract the temporal and frequency features of operational behaviors to construct a user behavior model; (b) Intelligent threshold calculation: Based on the user behavior model, normal operating patterns are analyzed using machine learning algorithms. By combining the statistical distribution of historical duration and the real-time frequency deviation, the first threshold T1 of adaptability is dynamically calculated; (c) Dynamic optimization mechanism: Regularly update the user behavior model and adjust the threshold generation rules based on the latest operational data; When a behavior pattern is detected to deviate significantly from historical patterns, the safety margin is automatically increased to strengthen the interlocking response.

3. The safety control method for an electricity metering box according to claim 2, characterized in that, The locking command in step S2 includes a phased locking process: (a) First stage: Alert-based interlocking When Δt reaches T1, the control device drives the door drive mechanism to close the door to a preset safe opening degree θ, which is 25° to 35°, and triggers the following operation: Activate the audible and visual alarm device to the warning state; Maintain the θ opening state for a preset waiting time τ, where τ is 3 to 5 seconds; (b) Second stage: Forced locking After the waiting time τ has elapsed, regardless of whether the cabinet door has been manually accessed, execute: The control device outputs a high-power pulse signal to drive the door drive mechanism to fully close the door. After verifying the closed state through the door opening detection device, the electromagnetic locking component of the second door lock is immediately activated. If a closure failure is detected, the audible and visual alarm device will be activated to the second alarm state.

4. The safety control method for an electricity metering box according to claim 3, characterized in that, The following decision logic is added after the warning interlocking phase in step (a): (a1) During the period of maintaining the θ opening state, the wide-angle camera of the visual monitoring device is used to acquire images of the operating area in real time; Convolutional neural networks are used to analyze image data, calculate the probability of people being present, and determine the presence or absence of people. (a2) When the system is determined to be unmanned, the sound and light alarm device shall be immediately terminated. The control box door drive mechanism is set to a low torque mode to smoothly close the box door to a fully closed state, wherein the torque of the low torque mode is less than or equal to 5 N·m; The second door lock's locking function must be disabled, and the first door lock must remain in a reversible open state. When it is determined that someone is present, continue to execute the forced locking procedure in step (b).

5. A safety control method for an electricity metering box, characterized in that, Based on the safety control system of the electricity metering box, the safety control system of the electricity metering box includes a time monitoring unit, a risk assessment unit, a drive control unit, a tamper detection module, a door drive mechanism and an electricity meter module. The time monitoring unit is configured to continuously collect the opening start time and closing time of the door and calculate the duration of a single opening. The risk assessment unit is signal-connected to the time monitoring unit and configured to compare the duration with a preset benchmark threshold, and generate a power theft risk determination signal when the duration exceeds the benchmark threshold; the drive control unit is signal-connected to the risk assessment unit and the door drive mechanism and configured to respond to the power theft risk determination signal and output a locking command to the door drive mechanism to forcibly lock the door. The tamper detection module is signal-connected to the drive control unit and is used to detect abnormal current fluctuations in the display circuit of the meter module. Based on the monitoring data, it generates a tamper judgment signal. The drive control unit responds to the tamper judgment signal first, interrupts the risk assessment signal, and outputs a locking command to the door drive mechanism to forcibly lock the door. The method includes the following steps: (1) The abnormal display circuit parameter change of the meter module is monitored in real time through the tamper detection module; when the preset tamper conditions are met, the door locking trigger command is immediately generated and the routine risk assessment process is interrupted. (2) After generating the door locking trigger command, the door closing process skips the door opening duration reference threshold judgment logic and directly sends the door locking drive signal to the door drive mechanism to drive the door to close in a preset priority mode. (3) Maintain the locked state of the cabinet door until an authorized unlocking command is received. The unlocking command must be verified through an independent security channel. After unlocking, reset the system to the initial monitoring state and clear the tampering event marker.

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