Intelligent grounding method based on NFC and state sensing
By combining NFC identity authentication and status sensors, the grounding connection status is monitored in real time and graded alarms are issued, which solves the safety defects in traditional grounding wire management and realizes full controllability, traceability and refined management of the power maintenance process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHANGQIU POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO
- Filing Date
- 2025-12-30
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional grounding wire management suffers from safety defects such as incorrect objects, false status, uncontrolled sequence, and black box process. Existing improvement solutions have failed to fully address the reliability and real-time sensing issues of grounding wires.
An intelligent grounding method based on NFC and status sensing is adopted. Through NFC identity authentication and status sensors, the tightness of the grounding connection, contact resistance and environmental parameters are monitored in real time. Combined with the data processing module, filtering comparison and hierarchical alarm are performed to achieve full control and traceability.
It enables mandatory binding of operator identities, real-time monitoring and early warning of grounding connections, and the creation of electronic work records, thereby improving the inherent safety and management sophistication of power maintenance.
Smart Images
Figure CN121908268A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power safety operation technology, and in particular to a smart grounding method based on NFC and status sensing. Background Technology
[0002] Traditional grounding wire management has systemic safety defects in terms of preventing errors and ensuring accuracy. The traditional operation mode has four core risks: First, the risk of incorrect object connection, where operators may accidentally enter a live area to connect the grounding wire, causing a serious accident; second, the risk of false status, where the reliability of the grounding wire connection cannot be perceived in real time, and the hidden dangers of false connections and loose connections are difficult to detect; third, the risk of uncontrolled sequence, where the safe sequence of connecting and disconnecting grounding wires depends on the self-awareness of the personnel, lacks technical interlocks, and is prone to violations of operation; and fourth, the risk of process black box, where operation information relies on manual recording, making it difficult to trace and provide early warnings.
[0003] While existing solutions offer some improvements, they all have limitations: the mechanical five-proof lock system mainly addresses the issue of accidental entry intervals but cannot detect the status of the grounding wire itself; the RFID-based intelligent grounding stake only achieves asset location management and remains a static management system; and the simple status indicator grounding wire is limited by insufficient reliability and poor anti-interference capabilities, and is not deeply integrated with the operation process and back-end system.
[0004] Therefore, there is an urgent need for an intelligent grounding technology solution that can systematically solve the above problems and achieve full-process controllability and traceability. Summary of the Invention
[0005] This application provides a smart grounding method based on NFC and status sensing to solve the above problems.
[0006] On the one hand, this application provides a smart grounding method based on NFC and status sensing, the method comprising the following steps: Step S1: Build an intelligent grounding system including a grounding body, NFC identification, status sensing, data processing and communication modules. The grounding body realizes the electrical connection between the equipment to be grounded and the earth, and the NFC identification module is integrated into the connection end of the grounding body. Step S2: The operator holds the NFC identity verification device close to the NFC recognition module to complete the identity authentication. Only after successful verification can the subsequent operation be performed; otherwise, the operation will be prohibited and an alarm will be triggered. Step S3: Connect the grounding body to the equipment to be grounded. During the process, the status sensing module collects the connection tightness, contact resistance and ambient temperature and humidity parameters in real time and transmits them to the data processing module. Step S4: The data processing module analyzes the parameters to determine whether the grounding meets the standards. If it does, the system is considered successful and the information is uploaded to the monitoring terminal. If it does not meet the standards, the system prompts for adjustment and issues an alarm. Step S5: After successful grounding, the status sensing module continuously collects operating parameters, and the data processing module monitors and analyzes them. If the parameters exceed the limits, an abnormal warning is sent and a graded alarm is triggered.
[0007] In one implementation of this application, the identity authentication in step S2 specifically includes: the NFC identification module establishing an NFC communication link with the identity identification device, and using an encrypted transmission protocol to read the operator ID, operation permission level, and department information stored in the identity identification device; the data processing module matching the read identity information with a preset legal identity information database, and determining that the identity authentication is successful when the match is successful and the operation permission level meets the current grounding operation requirements.
[0008] In one implementation of this application, the state sensing module in step S3 includes a pressure sensor, a resistance sensor, and a temperature and humidity sensor; the pressure sensor is used to collect pressure data at the connection point between the grounding main module and the equipment to be grounded, in order to characterize the connection tightness parameter; the resistance sensor is used to collect contact resistance data between the grounding main module and the equipment to be grounded, and grounding resistance data between the grounding main module and the earth; the temperature and humidity sensor is used to collect ambient temperature and humidity data of the grounding operation area.
[0009] In one implementation of this application, the pressure data collected by the pressure sensor is preset to a safe threshold range. When the collected pressure data is within the safe threshold range, the connection tightness is determined to meet the requirements. In one implementation of this application, the data processing module's analysis and processing of the state parameters in step S4 includes: filtering and noise reduction of the collected state parameters to remove abnormal data caused by environmental interference; comparing the processed state parameters with the corresponding preset safety thresholds; if all state parameters meet the preset safety thresholds, the grounding connection is deemed to meet the requirements; if at least one state parameter does not meet the preset safety threshold, the grounding connection is deemed to not meet the requirements.
[0010] In one implementation of this application, the alarm prompt in step S2 and the alarm signal in step S4 both include audible and visual alarms. The alarm prompt for failed identity authentication is a flashing red light accompanied by a low-frequency buzzer; the alarm signal for grounding failure is a solid red light accompanied by a high-frequency buzzer; the graded alarm in step S5 includes a first-level warning and a second-level warning. The first-level warning is a flashing yellow light accompanied by a medium-frequency buzzer, and the second-level warning is a solid red light accompanied by a high-frequency buzzer and linked to the voice prompt function of the monitoring terminal.
[0011] In one implementation of this application, the communication module in steps S4 and S5 adopts a wireless communication method, including at least one of Bluetooth, Wi-Fi and 4G / 5G; the data uploaded to the monitoring terminal by the data processing module includes operator identity information, grounding start time, grounding status parameters, whether grounding is successful and abnormal data during operation, and all data are timestamped and stored in the database of the monitoring terminal.
[0012] In one implementation of this application, a grounding termination process is also included: the operator holds the identification device close to the NFC identification module to send a termination command, the data processing module verifies and records the termination time, disconnects the connection, and summarizes the operation data to upload to the monitoring terminal to form a report.
[0013] In one implementation of this application, the data processing module has a fault self-diagnosis function, which periodically checks the working status of each module, and sends information containing the fault type and location to the monitoring terminal when a fault is detected.
[0014] In one implementation of this application, the continuous acquisition frequency of the status sensing module in step S5 can be adjusted according to the importance level of the grounding equipment, and an acquisition frequency adapted to the importance level can be configured for grounding equipment of different importance levels.
[0015] This application provides a smart grounding method based on NFC and status sensing, which has the following advantages: 1. By using NFC near-field communication to achieve mandatory identity binding and permission verification between operators and grounding equipment, and combining real-time sensor networks to dynamically monitor connection tightness, contact resistance and environmental parameters, a three-in-one proactive safety protection system of "human-machine-status" is constructed, which eliminates the risk of misoperation and identity fraud from the source and significantly improves the inherent safety level of the operation process.
[0016] 2. The system transforms abstract safety procedures into executable hardware logic and data criteria. Through the intelligent analysis module, it filters, compares, and judges thresholds of multi-source sensor data, realizing objective and real-time assessment of grounding connection quality and abnormal graded early warning. This promotes the transformation of safety management from post-event accountability to an intelligent model of pre-event prevention and in-event control.
[0017] 3. All operational data, status sequences, and alarm events throughout the entire process are automatically collected, timestamped, and uploaded to the monitoring terminal, forming a complete and tamper-proof electronic work record. This achieves full transparency and precise traceability of the grounding operation process, providing a reliable data foundation for operation and maintenance analysis, responsibility definition, and procedure optimization, and greatly improving the level of precision in safety management. Attached Figure Description
[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 A flowchart illustrating an intelligent grounding method based on NFC and status sensing, provided for an embodiment of this application. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0020] This application provides an intelligent grounding method based on NFC and status sensing. The technical solution proposed in this application will be described in detail below with reference to the accompanying drawings.
[0021] Figure 1 This is a flowchart illustrating a smart grounding method based on NFC and status sensing, provided as an embodiment of this application. Figure 1 As shown, the method mainly includes the following steps: Step S1: Build an intelligent grounding system including a grounding body, NFC identification, status sensing, data processing and communication modules. The grounding body realizes the electrical connection between the equipment to be grounded and the earth, and the NFC identification module is integrated into the connection end of the grounding body. Step S2: The operator holds the NFC identity verification device close to the NFC recognition module to complete the identity authentication. Only after successful verification can the subsequent operation be performed; otherwise, the operation will be prohibited and an alarm will be triggered. Step S3: Connect the grounding body to the equipment to be grounded. During the process, the status sensing module collects the connection tightness, contact resistance and ambient temperature and humidity parameters in real time and transmits them to the data processing module. Step S4: The data processing module analyzes the parameters to determine whether the grounding meets the standards. If it does, the system is considered successful and the information is uploaded to the monitoring terminal. If it does not meet the standards, the system prompts for adjustment and issues an alarm. Step S5: After successful grounding, the status sensing module continuously collects operating parameters, and the data processing module monitors and analyzes them. If the parameters exceed the limits, an abnormal warning is sent and a graded alarm is triggered.
[0022] In the solution of this application, the identity authentication process is specifically as follows: The NFC recognition module establishes a near-field communication link with the identity identification device carried by the operator, and securely reads the operator ID, permission level, and department information stored therein through an encryption protocol; Subsequently, the data processing module compares the obtained identity data with the pre-stored legal personnel information database. When the information matches and the permission of this person meets the level required for the current grounding operation, the authentication is considered passed.
[0023] The status sensing module consists of multiple sensors: The pressure sensor is used to monitor the pressing force at the connection between the grounding main body and the device to reflect the connection tightness; The resistance sensor is responsible for detecting the contact resistance between the two and the grounding resistance of the grounding main body to the ground; The temperature and humidity sensor collects the ambient temperature and humidity data at the operation site. For the pressure data, the system presets a safe threshold range, and only when the measured pressure falls within this range is the tightness determined to meet the requirements.
[0024] The data processing module performs preprocessing including filtering and noise reduction on the obtained status parameters to eliminate outliers caused by environmental interference; Then, it compares each processed parameter with the corresponding preset safety threshold one by one. If all parameters meet the threshold requirements, the grounding connection is determined to be qualified; If any one parameter exceeds the limit, the connection is determined to be unqualified.
[0025] Regarding alarm prompts, when the identity authentication fails, it will trigger the red light to flash and a low-frequency beep; When the grounding fails, it corresponds to the red light being constantly on and a high-frequency beep. During the continuous monitoring stage, the system sets hierarchical alarms: The first-level warning is manifested as the yellow light flashing and a medium-frequency beep; The second-level warning is the red light being constantly on and a high-frequency beep, and it also triggers the monitoring terminal to start a voice reminder.
[0026] The communication module supports wireless transmission methods such as Bluetooth, Wi-Fi, or 4G / 5G, and sends the data including the operator's identity, grounding start and end times, real-time status parameters, operation results, and abnormal situations, with a time stamp attached, to the monitoring terminal and stores it in the database.
[0027] In addition, the system includes a grounding end process: The operator uses the identity identification device again to send an end instruction to the NFC module. After verification, the system records the operation end time, disconnects the connection, and summarizes the whole-process data to generate a report for uploading. The data processing module also has a self-diagnosis function, regularly checks the operation status of each module, and sends information including the fault type and location to the monitoring end when a fault occurs. The system can dynamically adjust the data acquisition frequency of the status sensors according to the importance of the grounding equipment to achieve differential monitoring of different-level equipment.
[0028] Below is an application example of this application in a specific scenario: maintenance work is being carried out on a circuit breaker in a 110kV line bay at a 220kV substation. The work involves safely grounding the lines on both sides of the de-energized 110kV circuit breaker to ensure the safety of the maintenance personnel.
[0029] Participating Equipment and Personnel: Operator: Maintenance team member A with the appropriate qualifications and operating permissions. Identification Equipment: NFC work card held by A, with his / her identity ID, access level, and team information already entered. Intelligent Grounding System: Intelligent grounding device deployed in this 110kV bay, including an NFC identification module integrated on the grounding clamp, a status sensing module (pressure / resistance / temperature and humidity sensors), a built-in data processing unit, and a 4G communication module. Monitoring Terminal: Safety operation monitoring platform in the substation's main control room.
[0030] Example of a specific application process: 1. Preparation and Identity Verification: Maintenance personnel A arrives at the designated 110kV bay carrying a dedicated grounding wire and their personal NFC work card. A brings their NFC work card close to the NFC recognition area on the grounding wire clamp. The system reads the work card information via encrypted communication, and the data processing module compares it with the backend database to confirm that "A" has the "grounding operation" permission for this bay, thus verifying identity. If authentication fails (e.g., unauthorized personnel or insufficient permissions), the device will immediately emit a flashing red light accompanied by a low-frequency beeping alarm and lock subsequent operations.
[0031] 2. Grounding Wire Connection and Real-time Status Monitoring: After authentication, A begins connecting the grounding wire. He first reliably connects the grounding terminal to the grounding stake in the grounding grid. During this process, pressure sensors monitor the clamping force between the clamp and the grounding stake, and between the equipment clamp and the circuit breaker terminals in real time. Resistance sensors simultaneously measure the grounding resistance between the clamp and the grounding stake, and the contact resistance between the clamp and the circuit breaker terminals. Temperature and humidity sensors collect temperature and humidity data from the work site. All sensor data is transmitted to the data processing module in real time.
[0032] 3. Intelligent Connection Quality Judgment: The data processing module performs filtering and noise reduction preprocessing on the received pressure, resistance, temperature, and humidity data. The processed data is compared with preset thresholds: the pressure value must be within the safe threshold range to ensure tightness; the grounding resistance and contact resistance must be lower than the safety upper limit specified in the regulations; ambient temperature and humidity are used as auxiliary references. If all parameters meet the standards, the system determines that the grounding connection is qualified, and the data processing module uploads the "grounding successful" information, operator "A", start time, and various measured parameters to the main control room monitoring platform via the 4G network after adding a timestamp.
[0033] If any parameter fails to meet the standard (for example, insufficient pressure indicates a possible loose connection, or excessive resistance indicates poor contact), the system determines that the connection is unqualified, immediately triggers a local alarm with a constant red light and a high-frequency buzzer, and simultaneously prompts the user to adjust the direction on the handheld terminal or local indicator screen (such as "Please increase the clamping force" or "Please check the contact surface"), and prevents the system from reporting a successful status.
[0034] 4. Continuous monitoring and early warning during operation: After the grounding wire is successfully connected, the system enters continuous monitoring mode. The status sensing module continues to collect various parameters at a preset frequency (for example, for 110kV equipment of this importance, it is set to collect once per second).
[0035] The data processing module continuously analyzes the data. If, during maintenance, equipment vibration causes a slight loosening of the clamp, and the pressure sensor data drops to the first-level warning threshold, the system immediately activates a first-level warning with flashing yellow lights and a mid-frequency buzzer, alerting nearby personnel to check. If the loosening worsens, causing a further drop in pressure or an increase in resistance to the second-level warning threshold, the system upgrades to a second-level warning with a solid red light and a high-frequency buzzer, and triggers a voice broadcast on the monitoring platform (e.g., "Attention! Grounding wire connection abnormal in XX bay!") to notify remote monitoring personnel to intervene urgently.
[0036] 5. Work Completion and Data Archiving: After the maintenance work is completed, A needs to remove the grounding wire. He brings his NFC work card close to the NFC identification module again and sends a "Work Completed" command. After verifying his identity, the system records the work completion time. The data processing module summarizes the complete data chain of this grounding operation (including start and end times, operator, timeline records of all status parameters, alarm events, etc.), generates a structured report, and uploads it to the monitoring platform through the communication module, forming an immutable electronic work archive for subsequent traceability and analysis.
[0037] 6. System Self-Check and Maintenance: During non-operational periods, the data processing module periodically executes a self-diagnostic program to check whether the NFC module, various sensors, and communication links are functioning properly. Upon detecting a fault (such as an abnormal sensor signal), it immediately sends an alarm message to the monitoring terminal containing the specific faulty component and suggested troubleshooting locations, facilitating proactive maintenance by operations and maintenance personnel and ensuring system reliability.
[0038] Summary of Results: As demonstrated by the application examples above, this application's method deeply integrates NFC authentication, multi-state real-time sensing, intelligent analysis and early warning, and end-to-end data traceability, permeating the entire "identity verification-connection-monitoring-removal" process of grounding operations. It not only effectively prevents traditional risks such as accidental entry into the designated area and misoperation, but also transforms safety management from passive result inspection to proactive process control through real-time connection status sensing and intelligent early warning, significantly improving the inherent safety level and refined, information-based management capabilities of power maintenance grounding operations.
[0039] The various embodiments in this application are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.
[0040] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0041] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.
Claims
1. A smart grounding method based on NFC and status sensing, characterized in that, The method includes the following steps: Step S1: Build an intelligent grounding system. The grounding main body enables the electrical connection between the equipment to be grounded and the earth. The NFC identification module is integrated into the connection end of the grounding main body. Step S2: The operator holds the NFC identity verification device close to the NFC recognition module to complete the identity authentication. Only after successful verification can the subsequent operation be performed; otherwise, the operation will be prohibited and an alarm will be triggered. Step S3: Connect the grounding body to the equipment to be grounded. During the process, the status sensing module collects the connection tightness, contact resistance and ambient temperature and humidity parameters in real time and transmits them to the data processing module. Step S4: The data processing module analyzes the parameters to determine whether the grounding meets the standards. If it does, the system is considered successful and the information is uploaded to the monitoring terminal. If it does not meet the standards, the system prompts for adjustment and issues an alarm. Step S5: After successful grounding, the status sensing module continuously collects operating parameters, and the data processing module monitors and analyzes them. If the parameters exceed the limits, an abnormal warning is sent and a graded alarm is triggered.
2. The intelligent grounding method based on NFC and status sensing according to claim 1, characterized in that, The identity authentication in step S2 specifically includes: the NFC identification module establishing an NFC communication link with the identity identification device, and using an encrypted transmission protocol to read the operator ID, operation permission level, and department information stored in the identity identification device; the data processing module matching the read identity information with a preset legal identity information database, and determining that the identity authentication is successful when the match is successful and the operation permission level meets the current grounding operation requirements.
3. The intelligent grounding method based on NFC and status sensing according to claim 1, characterized in that, The state sensing module mentioned in step S3 includes a pressure sensor, a resistance sensor, and a temperature and humidity sensor; the pressure sensor is used to collect pressure data at the connection point between the grounding main module and the equipment to be grounded, in order to characterize the connection tightness parameters; the resistance sensor is used to collect contact resistance data between the grounding main module and the equipment to be grounded, and grounding resistance data between the grounding main module and the earth; the temperature and humidity sensor is used to collect ambient temperature and humidity data of the grounding operation area.
4. The intelligent grounding method based on NFC and status sensing according to claim 3, characterized in that, The pressure data collected by the pressure sensor is preset to a safe threshold range. When the collected pressure data is within the safe threshold range, the connection tightness is determined to meet the requirements.
5. The intelligent grounding method based on NFC and status sensing according to claim 1, characterized in that, The data processing module in step S4 analyzes and processes the status parameters, including: filtering and denoising the collected status parameters to remove abnormal data caused by environmental interference; comparing the processed status parameters with the corresponding preset safety thresholds; if all status parameters meet the preset safety thresholds, the grounding connection is deemed to meet the requirements; if at least one status parameter does not meet the preset safety threshold, the grounding connection is deemed to not meet the requirements.
6. The intelligent grounding method based on NFC and status sensing according to claim 1, characterized in that, The alarm prompts mentioned in step S2 and the alarm signals mentioned in step S4 both include audible and visual alarms. The alarm prompt for failed identity authentication is a flashing red light accompanied by a low-frequency buzzer; the alarm signal for grounding failure is a solid red light accompanied by a high-frequency buzzer; the graded alarms mentioned in step S5 include a first-level warning and a second-level warning. The first-level warning is a flashing yellow light accompanied by a medium-frequency buzzer, and the second-level warning is a solid red light accompanied by a high-frequency buzzer and is linked to the voice prompt function of the monitoring terminal.
7. The intelligent grounding method based on NFC and status sensing according to claim 1, characterized in that, In steps S4 and S5, the communication module uses wireless communication, including at least one of Bluetooth, Wi-Fi, and 4G / 5G; the data uploaded by the data processing module to the monitoring terminal includes operator identity information, grounding start time, grounding status parameters, whether grounding was successful, and abnormal data during operation, and all data is timestamped and stored in the database of the monitoring terminal.
8. The intelligent grounding method based on NFC and status sensing according to claim 1, characterized in that, It also includes a grounding termination process: the operator holds the identification device close to the NFC recognition module to send a termination command, the data processing module verifies and records the termination time, disconnects the connection, and summarizes the operation data to upload to the monitoring terminal to form a report.
9. The intelligent grounding method based on NFC and status sensing according to claim 1, characterized in that, The data processing module has a fault self-diagnosis function, which periodically checks the working status of each module. If a fault is detected, it sends information including the fault type and location to the monitoring terminal.
10. The intelligent grounding method based on NFC and status sensing according to claim 1, characterized in that, In step S5, the continuous acquisition frequency of the status sensing module can be adjusted according to the importance level of the grounding equipment, and an acquisition frequency adapted to the importance level can be configured for grounding equipment of different importance levels.