Intelligent electrostatic grounding alarm

Abstract

The invention relates to an intelligent static grounding alarm, which is used for dangerous goods places such as Chinese petrochemical engineering, Chinese aviation oil and armies, belongs to the technical field of industrial safety monitoring, and comprises a shell, a static conductive grounding alarm and a winding device, the shell is divided into upper and lower spaces by a horizontal partition plate; the static conductive grounding alarm is located in the upper space and comprises a mainboard, an over-current protector, a display screen and an alarm. The mainboard is integrated with an intelligent diagnosis module based on multi-source information fusion, the module synchronously collects grounding resistance, loop current, connection point voltage drop, environment temperature and humidity and clamping force data, an improved D-S evidence theory algorithm is adopted to carry out real-time fusion analysis, trend early warning is carried out through an LSTM network, and the intelligent diagnosis module is used for diagnosing the clamping force. And four-level credibility evaluation and predictive maintenance of the grounding state are realized. According to the invention, the problems of high false alarm rate, large electric leakage risk, poor night visibility and inconvenient maintenance in the prior art are solved, and the reliability, safety and intelligent level of electrostatic grounding monitoring are significantly improved.

Description

A smart electrostatic grounding alarm Technical Field

[0001] This invention relates to the field of industrial safety equipment technology, specifically to an intelligent electrostatic grounding alarm for loading, unloading, and storage sites of flammable and explosive hazardous materials. Background Technology

[0002] In hazardous materials handling facilities such as Sinopec (gas stations), China Aviation Oil, and the military, friction generates significant amounts of static electricity during the transfer of flammable and explosive media via tank trucks and storage tanks. If this static charge accumulates and is not promptly grounded, it can easily generate discharge sparks, leading to serious safety accidents. Therefore, static grounding alarms are indispensable critical safety equipment in such operations. Their core functions are twofold: first, to provide a reliable static discharge path for the transfer equipment; and second, to continuously monitor the continuity of the grounding circuit, triggering an alarm when the circuit is broken or the resistance is too high.

[0003] Currently, the technological evolution of electrostatic grounding alarms on the market mainly revolves around structural optimization and functional integration. For example, patent CN223205641U discloses an alarm device with a wire harness recycling function, which mainly solves the problem of messy and inconvenient storage of grounding cables. Patent CN118980835A discloses a conductivity detector with integrated temperature monitoring, aiming to improve the accuracy of oil conductivity detection through temperature compensation. However, these improvements have not addressed the deep-seated defects in the core monitoring reliability, inherent safety, and intelligence of such devices, mainly including: 1. High false alarm rate and misjudgment of status: Most products adopt a simple "on / off" or "threshold comparison" principle. That is, they only monitor the loop resistance, and when the resistance value exceeds a set threshold (such as 55Ω), it is judged as a fault and an alarm is triggered. However, in actual complex industrial environments (such as tanker shaking, instantaneous oxidation of connection points, drastic changes in ambient temperature and humidity, electromagnetic interference, etc.), the grounding resistance value will fluctuate briefly, leading to frequent false alarms, creating a "boy who cried wolf" effect, seriously reducing the reliability of the alarm, and easily causing staff to become desensitized. Meanwhile, traditional equipment may not be able to identify "high-resistance connection" (i.e., increased contact resistance but not completely disconnected) caused by loose connection points in a timely manner, which may lead to missed detection.

[0004] 2. Lack of leakage current protection: Current alarms are designed to handle only microampere-level electrostatic discharge current. However, when monitored equipment such as tank trucks and pipelines experience power frequency leakage due to insulation damage, dangerous current may flow back into the alarm body along the grounding wire. This can not only burn out the alarm's internal precision circuitry, but more seriously, it may electrify the grounding clamps, cables, and even the alarm casing, posing a fatal electric shock hazard to operators—the so-called "backstab" risk. Current products generally lack intrinsically safe isolation or protection designs to address this risk.

[0005] 3. Limited monitoring dimensions, hindering predictive maintenance: Existing technologies only provide binary information on "whether the connection is currently established," failing to assess the "good" or "bad" trend of grounding quality. Operators have no way of knowing whether grounding stakes are corroded, connection clamps are loose, or cables are aging. Maintenance work relies entirely on reactive repairs after a fault occurs or fixed periodic replacements, making predictive maintenance based on equipment health status impossible, which is both uneconomical and creates safety windows.

[0006] Therefore, developing a new generation of electrostatic grounding alarm that integrates intelligent diagnosis, multiple safety protections, status prediction, and user-friendly design is of urgent market demand and significant safety importance. Summary of the Invention

[0007] The present invention aims to overcome the shortcomings of the prior art and provide an intelligent electrostatic grounding alarm. Its core purpose is to significantly improve the reliability, safety and user experience of the device through the deep integration of hardware security protection and software intelligent diagnosis.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: An intelligent electrostatic grounding alarm mainly includes a housing, a conductive electrostatic grounding alarm, and a winding device. The housing is arranged vertically by horizontal partitions, resulting in a compact structure. The conductive electrostatic grounding alarm is located in the upper space. Its core innovation lies in the integrated intelligent diagnostic module on the mainboard, and the addition of an overcurrent protector.

[0009] The intelligent diagnostic module, the core software component of this invention, constructs a comprehensive state perception system by simultaneously collecting five dimensions of data: grounding resistance, loop current, connection point voltage drop, ambient temperature and humidity, and grounding clamp holding force. The module employs an improved DS evidence theory algorithm to perform real-time fusion analysis of multi-source data, effectively suppressing false alarms caused by single parameter jumps and calculating a comprehensive reliability value reflecting the grounding status. Simultaneously, the module utilizes a long short-term memory network to perform time-series analysis of historical grounding resistance data, enabling early warning of performance degradation. Finally, the system refines the grounding status into four levels: "Excellent," "Good," "Caution," and "Fault," providing output and prompts.

[0010] The overcurrent protector is connected in series between the cable and the motherboard. It has three independent pluggable fuses inside, each corresponding to one of the cores of the three-core cable, providing physical protection against leakage current.

[0011] The cable uses a three-core structure, including an electrostatic discharge line, a detection line, and a common line. When the motherboard is powered on, it first connects the electrostatic discharge line and the common line for self-testing. After the self-test is successful, it switches to the detection line and the common line circuit for operational monitoring, thereby ensuring that the electrostatic discharge line is not energized under normal monitoring conditions, which facilitates maintenance and testing.

[0012] Furthermore, the cable sheath is made of a highly wear-resistant, self-fluorescent material to enhance nighttime visibility; the display screen on the top of the housing is set at a 30-60 degree angle for easy observation while standing; and the winding device can achieve uniform cable winding.

[0013] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: 1. The reliability is greatly improved: the intelligent diagnostic algorithm reduces the false alarm rate caused by environmental interference from the industry average of 5%-10% to less than 1%. At the same time, by identifying states such as "high resistance connectivity", the risk of missed alarms is reduced and the alarm reliability is extremely high.

[0014] 2. Intrinsic safety guarantee: The overcurrent protector provides ultimate physical protection against leakage current "backstrike"; the three-core wire design avoids potential risks to maintenance personnel from the detection current; and the fluorescent cable enhances on-site physical safety.

[0015] 3. Maintenance mode transformation: Through the trend early warning function, the system has shifted from "post-failure maintenance" to "pre-failure maintenance", which improves equipment availability and reduces the probability of sudden safety accidents and overall maintenance costs.

[0016] 4. User experience optimization: The tilted screen, cable visibility at night, convenient fuse replacement, and support for non-powered testing make the entire process of equipment installation, observation, and maintenance safer, easier, and more efficient. Attached Figure Description

[0017] The technical solution of the present invention will be further described below with reference to the accompanying drawings: Figure 1 is a schematic cross-sectional view of the overall structure of the intelligent electrostatic grounding alarm of the present invention; Figure 2 is a wiring diagram of the three-core cable in the present invention; Figure 3 is a flowchart of the software algorithm logic of the intelligent diagnostic module.

[0018] The components include: 1. Shell; 11. Partition; 12. Upper electrical compartment; 13. Lower mechanical compartment; 2. Winding device; 3. Main board; 4. Overcurrent protector; 41. Fuse; 5. LCD display screen; 6. Integrated sound, light and voice alarm; 7. Power module; 8. Cable; 81. Static discharge line; 82. Detection line; 83. Common line; 9. Intelligent grounding clamp. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figures 1-3 show the intelligent electrostatic grounding alarm described in this invention. The core of its technical solution lies in the integration of hardware security architecture, multi-dimensional sensing system and intelligent diagnostic algorithm.

[0021] An intelligent electrostatic grounding alarm includes a housing 1, an electrostatic grounding alarm disposed within the housing 1, and a winding device 2.

[0022] The housing 1 is made of high-strength engineering plastic or metal material, which has good impact resistance, corrosion resistance and electromagnetic shielding performance. The inner cavity of the housing 1 is divided into an upper electrical compartment 12 and a lower mechanical compartment 13 by a horizontally set metal partition 11. This design effectively isolates the mechanical vibration of the winding mechanism and the interference of dust on the upper precision electronic circuits, and improves the overall structural strength.

[0023] The electrostatic discharge grounding alarm is the core of the system, integrated within the upper electrical compartment 12. It includes a mainboard 3, an intelligent sensing subsystem, an overcurrent protector 4, a human-machine interface unit, and a power module 7. The mainboard 3 serves as the central processing unit, employing a low-power, high-performance microcontroller based on the ARM Cortex-M4 core. The mainboard 3 integrates a high-precision analog front-end circuit, a multi-channel synchronous analog-to-digital converter, a relay drive circuit, a communication interface, and the key intelligent diagnostic module of this invention. This module runs as embedded software, responsible for coordinating the operation of all sensors and executing the core algorithm.

[0024] The intelligent sensing subsystem comprises multiple sensors that provide raw data to the motherboard 3. These include a grounding resistance measurement unit, a loop current monitoring sensor, and a connection point status sensor. The grounding resistance measurement unit employs a constant current source-voltage detection method. A known, safe microampere-level AC test current is injected into the detection loop through a precision constant current source on the motherboard 3, accurately measuring the voltage drop across the loop to calculate the loop resistance. The loop current monitoring sensor uses a non-contact miniature Hall current sensor connected in series in the common ground loop to monitor the current amplitude and waveform in real time, which can be used to determine the presence of abnormal current (such as leakage). The connection point status sensor incorporates a high-precision strain gauge-based thin-film pressure sensor within the jaws of the intelligent grounding clamp 9 for real-time measurement of clamping force. A miniature electrochemical sensor is located at the contact point between the clamp and the metal surface to monitor the micro-voltage drop and temperature / humidity near the contact point. This data is transmitted to the motherboard 3 via a dedicated signal line in cable 8 through a miniature signal conditioning circuit integrated within the clamp.

[0025] The overcurrent protector 4 is the key safety hardware of this invention. Its input terminal is directly connected to the external three-core cable 8, and its output terminal is connected to the motherboard 3. Internally, the protector has three independent protection branches, each containing a fast-blow, pluggable fuse holder and a fuse 41 of the corresponding specification (for example, a 500mA / 250V slow-blow fuse can be selected for the electrostatic discharge circuit, and a 100mA / 250V fast-blow fuse can be selected for the detection circuit). When an abnormal current exceeding the safety threshold (such as power frequency leakage) occurs on any line, the corresponding fuse 41 will melt within milliseconds, physically cutting off the dangerous path and protecting subsequent circuits and personnel safety.

[0026] The human-computer interaction unit includes a high-brightness LCD display screen 5 fixed at an angle of 30-60 degrees (preferably 45 degrees) on the top cover of the housing 1, which supports visibility in sunlight; an integrated sound, light and voice alarm 6 that integrates a high-volume buzzer, multi-color LED warning lights (red / yellow / green) and a voice synthesis chip; and several waterproof buttons.

[0027] The power module 7 is powered by an explosion-proof certified lithium battery pack, typically a 3.6V disposable lithium-ion battery or a rechargeable lithium-ion battery pack, with a battery life of more than one year and an undervoltage alarm function.

[0028] The winding device 2, located in the lower mechanical compartment 13, is used to house the cable 8 connected to the intelligent grounding clamp 9. It includes a horizontally placed winding roller, a drive mechanism (which can be a manual crank, a micro geared motor, or a combination of both) to provide rotational power to the winding roller, and a crucial reciprocating sliding cable routing device. This cable routing device, using existing technology such as a screw or cam mechanism, ensures that the cable 8 is evenly and tightly wound in layers on the winding roller during winding and unwinding, preventing the cable 8 from becoming tangled, knotted, or subject to mutual compression and wear.

[0029] Detailed description of core innovations: I. Intelligent diagnosis and false alarm reduction algorithm based on multi-source information fusion: This is the "brain" of the invention. The algorithm runs in the intelligent diagnosis module of motherboard 3, and its process is as follows: 1. Data synchronous acquisition: The system synchronously triggers and reads the data of all sensors at a fixed sampling period (e.g., 10 times per second) to ensure that the timestamps of each parameter are aligned.

[0030] 2. Feature extraction and preprocessing: Perform digital filtering (such as Kalman filtering) on ​​the original data to remove noise and extract effective feature values, such as the mean and variance of resistance, the fundamental component of current, and the stability index of clamping force.

[0031] 3. Improved DS Evidence Theory Integration: Identification Framework Establishment: Define the identification framework for grounding status as Θ = {Reliable, Uncertain, Faulty}.

[0032] Basic probability allocation: Design a dedicated basic probability allocation function for each source of evidence (sensor). For example: • For grounding resistance R: When R < 10Ω, m_R (reliable) = 0.9, m_R (uncertain) = 0.1, m_R (fault) = 0; when 10Ω ≤ R < 55Ω, the probability tilts towards "uncertain"; when R ≥ 55Ω, the probability tilts towards "fault".

[0033] • Regarding the clamping force F: When F is stable near the rated value, strong support is “reliable”; when F fluctuates or falls below the threshold, support is “uncertain” or “failure”.

[0034] • For loop current I: When a 50 / 60Hz power frequency component is detected, it strongly supports the "fault" (suspected leakage).

[0035] Evidence synthesis and decision-making: The improved weighted Dempster combination rule of this invention is adopted. First, appropriate weight factors are assigned to each sensor based on its long-term historical data (such as failure rate and drift). When multiple pieces of evidence conflict (e.g., resistance momentarily exceeds the limit but clamping force is normal), the algorithm does not simply deny them, but performs weighted average synthesis to finally calculate the comprehensive confidence value for propositions such as "reliable" and "fault". Only when the comprehensive confidence value of the "fault" proposition exceeds a very high confidence threshold (e.g., 0.85) will the system determine it as a real fault and issue an alarm, thereby effectively filtering out transient interference.

[0036] II. LSTM Network-Driven Trend Warning and Predictive Maintenance: A lightweight Long Short-Term Memory (LSTM) neural network model runs in parallel within the algorithm. This model takes grounding resistance time-series data and ambient temperature data over a past time window (e.g., 24 hours) as input. After offline training, the model can learn the normal variation pattern of grounding resistance under the influence of various factors. During online operation, the model predicts the resistance change trend in real time over a future period (e.g., the next hour). When the predicted value approaches or exceeds the warning threshold, or when the slope of the prediction curve changes abnormally, the system does not trigger an emergency alarm. Instead, it displays a yellow warning message on the screen stating "Grounding performance is showing a downward trend; it is recommended to check the connection points." This information can also be uploaded to the backend management system for scheduled maintenance.

[0037] III. Three-Core Cable Structure and Safety Self-Test Logic: This invention abandons the traditional two-core cable and adopts a three-core dedicated cable 8 consisting of a thick electrostatic discharge wire 81, a thin detection wire 82, and a medium common wire 83. Its core logic is implemented by the mainboard 3 controlling the relay: 1. Power-on self-test stage: After the device is powered on, the mainboard 3 first controls the relay K1 to engage, connecting the electrostatic discharge wire 81 and the common wire 83, forming a closed "cable self-test circuit" without a ground path. The mainboard 3 measures the resistance of this circuit. If the resistance is infinite or abnormally high, it is determined that the electrostatic discharge wire 81 or the common wire 83 is open-circuited, and an alarm for "cable fault" is immediately triggered to prevent the use of damaged cables.

[0038] 2. Normal operating phase: After the self-test passes, relay K1 disconnects and K2 engages, connecting the detection line 82 to the common line 83, forming a "grounding monitoring loop" that includes a ground path. At this time, the electrostatic discharge line 81 is electrically suspended and carries no detection current. A multimeter can safely measure the resistance across its two ends for easy maintenance.

[0039] 3. This design physically separates the "high-voltage" discharge path from the "low-voltage" detection path, improving safety and maintainability.

[0040] IV. Comprehensive Humanized and Safety Design: 1. Tilt Display Screen: Conforms to the natural downward viewing angle of the human eye, allowing for clear data reading without bending over.

[0041] 2. Self-fluorescent warning cable: The outer sheath of the cable is made of high-strength polyurethane material mixed with long-lasting rare earth fluorescent powder. It absorbs light energy during the day and automatically emits a long-lasting, soft green fluorescence at night or in the dark, significantly improving visibility and preventing tripping risks.

[0042] 3. Plug-in fuses: The fuses on the overcurrent protector 4 adopt a standard automotive-grade plug-in design, which can be replaced without tools. Furthermore, fuses with different safety ratings can be flexibly replaced according to the expected short-circuit current in different environments, making them highly adaptable.

[0043] The workflow is as follows: 1. System power-on and initialization: The installer fixes the equipment to the loading and unloading platform column and clamps the grounding clamp onto the designated grounding stake on the tank truck. Turn on the power switch.

[0044] ① System self-test: The mainboard 3 first controls relay K1 to engage (K2 to disengage), and measures the resistance between the electrostatic discharge line 81 and the common line 83. If the resistance is less than 1Ω, the cable is normal, and the screen displays "System self-test passed". If the resistance is too high, the screen displays "Cable fault, please check", and the red light flashes.

[0045] ② Parameter settings: The main alarm resistance threshold (e.g., 55Ω), warning threshold (e.g., 30Ω), alarm volume, etc. can be set by pressing the buttons.

[0046] 2. Normal operation and intelligent diagnosis: After the self-test is passed, the system enters the working mode (K1 is disconnected, K2 is engaged).

[0047] ① Data acquisition: The motherboard 3 synchronously acquires the following data every 100 milliseconds: grounding resistance value (measured through the detection line 82-common line 83 loop), voltage signal output by the Hall current sensor (reflecting the loop current), clamping force, temperature and humidity, and micro-voltage data transmitted by the grounding clamp.

[0048] ② Algorithm Execution: Real-time Fusion: Suppose that at a certain moment, a slight vibration causes the grounding resistance to momentarily jump to 60Ω (exceeding the 55Ω threshold), but the clamping force sensor data shows that the pressure is stable and normal, the loop current is normal, and the ambient temperature does not change abruptly. At this time, in the DS algorithm, the resistance evidence supports "fault," but the clamping force and current evidence strongly support "reliability." After the algorithm performs conflict synthesis based on the weights of each sensor (e.g., the clamping force weight is set to 0.4, and the resistance weight to 0.3), the overall confidence value of the "fault" proposition may only be 0.35, far below the alarm threshold of 0.85. Therefore, the system does not alarm, the status light remains green, and this fluctuation event is only recorded in the background.

[0049] Trend Warning: After a week of continuous operation, LSTM model analysis revealed a slow but continuous linear upward trend in the average grounding resistance value at the same time each day (e.g., gradually increasing from 5Ω to 25Ω), although still far below the alarm threshold of 55Ω. The model predicted that, following this trend, the resistance might exceed the warning threshold of 30Ω after 48 hours. Therefore, the system displayed a yellow warning message: "Caution: Grounding resistance is trending upward; it is recommended to check grounding stake corrosion or clamp cleanliness," and uploaded this warning to the control room.

[0050] 3. Fault and Alarm Handling: If the grounding clamp is accidentally knocked off, the resistance becomes infinite, and the clamping force drops to 0. All evidence highly supports the "fault," and the overall confidence value instantly exceeds 0.9. The system immediately triggers the highest level alarm: the red warning light flashes, the buzzer sounds a rapid long beep, and the display shows "Fault: Grounding Disconnected!".

[0051] If the tanker truck experiences a leakage, the power frequency current flows into the grounding circuit. The Hall sensor will immediately detect the abnormal 50Hz AC component, providing strong evidence of a "fault." Simultaneously, fuse 41 in the overcurrent protector 4 may blow within tens of milliseconds. Before blowing, the intelligent algorithm may have already triggered a "suspected leakage fault" alarm based on the abnormal current; after fuse 41 blows, the detection circuit breaks, the resistance becomes infinite, and the fault is confirmed again. Multiple safeguards ensure safety in extreme situations.

[0052] 4. Routine Maintenance: During nighttime inspections, the fluorescent cable is clearly visible. If a problem is suspected in a section of the cable, the equipment can be turned off directly, and the two ends of the electrostatic discharge wire 81 can be measured with a multimeter in resistance mode (since it is not energized during operation, there is no need to worry about damaging the multimeter). If fuse 41 needs to be replaced, simply open the compartment door, remove the old fuse 41, and insert the new one.

[0053] The above embodiments demonstrate that this invention, through collaborative innovation in hardware and software, constructs a highly reliable, safe, intelligent, and user-friendly electrostatic grounding monitoring solution. Those skilled in the art can make various equivalent substitutions or minor modifications under the guidance of the core concepts of this invention (multi-source information fusion diagnosis, three-core wire safety logic, overcurrent protection, and user-friendly design), all of which fall within the protection scope of this invention.

Claims

1. An intelligent electrostatic grounding alarm, comprising a housing, a conductive electrostatic grounding alarm disposed within the housing, and a winding device, characterized in that: The electrostatic discharge grounding alarm includes a main board, an overcurrent protector, and an alarm. The main board integrates an intelligent diagnostic module, which is configured to: synchronously collect grounding resistance, loop current, connection point voltage drop, ambient temperature and humidity, and grounding clamp holding force data; perform real-time fusion analysis of multi-source data based on an improved DS evidence theory algorithm to calculate the comprehensive reliability of the grounding status; and perform trend analysis of grounding resistance time-series data based on an LSTM network to predict the risk of performance degradation. Based on the comprehensive reliability and trend analysis results, the four-level grounding status assessment results are output. The overcurrent protector is connected in series between the external cable and the input terminal of the motherboard; the winding device is used to wind up and unwind the cable connected to the grounding clamp.

2. The intelligent electrostatic grounding alarm according to claim 1, characterized in that, The cable is a three-core cable, including an electrostatic discharge line, a detection line, and a common line; the motherboard is configured to: control the electrostatic discharge line and the common line to connect first to form a first circuit during startup, and perform cable continuity self-test; After the self-test passes, the system switches to connect the control detection line with the common line to form a second circuit for grounding resistance testing.

3. The intelligent electrostatic grounding alarm according to claim 2, characterized in that, The overcurrent protector is equipped with three independent pluggable fuses, which are connected one-to-one with the three core wires of the three-core cable.

4. The intelligent electrostatic grounding alarm according to claim 1, characterized in that, The outer sheath of the cable is made of a highly wear-resistant, self-fluorescent material.

5. The intelligent electrostatic grounding alarm according to claim 1, characterized in that, The top of the housing is equipped with a tilted display screen, the tilt angle of which is 30 degrees to 60 degrees.

6. The intelligent electrostatic grounding alarm according to claim 1, characterized in that, The specific steps of the intelligent diagnostic module for real-time fusion analysis include: establishing basic probability allocation functions for the data from each sensor, including grounding resistance, loop current, connection point voltage drop, ambient temperature and humidity, and clamping force, and mapping them to the "reliable," "uncertain," and "fault" identification frameworks; dynamically allocating weights based on the historical reliability data of each sensor, and using a weighted average method to synthesize conflicting evidence to obtain a comprehensive reliability value for the "grounding reliability" proposition; and comparing the comprehensive reliability value with a preset threshold to determine the current grounding status level.

7. The intelligent electrostatic grounding alarm according to claim 1, characterized in that, The intelligent diagnostic module outputs a four-level grounding status assessment result, including "Excellent", "Good", "Caution", and "Fault". When the status is "Caution", the alarm will activate a warning prompt; when the status is "Fault", an audible and visual alarm will be activated.

8. The intelligent electrostatic grounding alarm according to claim 1, characterized in that, It also includes a thin-film pressure sensor installed inside the smart grounding clamp for real-time monitoring of the clamping force data.

9. The intelligent electrostatic grounding alarm according to claim 1, characterized in that, The winding device includes a horizontally arranged winding roller, a drive mechanism, and a reciprocating sliding device; the drive mechanism can be manually driven, motor driven, or a combination of both.

10. A monitoring method based on the intelligent electrostatic grounding alarm device according to any one of claims 1-9, characterized in that, Includes the following steps: Simultaneously collect multi-dimensional sensor data; Call the intelligent diagnostic module to perform real-time fusion analysis and trend warning; Based on the diagnostic results, the alarm device is controlled to issue corresponding prompts or alarms and display the status level; the overcurrent protector provides physical protection against leakage current.

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