Telescopic fence safety measure on-line monitoring device and detection method

Abstract

The invention discloses a telescopic fence safety measure on-line monitoring device and a detection method, and mainly relates to the technical field of electric power safety operation and on-line monitoring. The device comprises a monitoring host, a conductive monitoring line and a fixing clamp. The conductive monitoring lines are arranged on the plurality of telescopic fences forming the safety isolation area through the fixing clamps to form a closed-loop electrical monitoring loop and are connected with the monitoring host. The method comprises the following steps: arranging safety measures and initializing a device to form an electrical loop; the on-off state of the loop is monitored in real time; if the loop is disconnected, a local sound-light alarm is triggered and alarm information is sent to a remote background; and recovering the device after the work is finished. The system has the beneficial effects that electrified closed-loop real-time monitoring and instant damage alarm of fence safety measures are realized.

Description

Technical Field

[0001] This invention relates to the field of power safety operation and online monitoring technology, specifically to an online monitoring device and detection method for retractable fence safety measures. Background Technology

[0002] In power system substation operation and maintenance, equipment repair and other work sites, to ensure the safety of personnel and equipment, it is usually necessary to use multiple retractable fences to construct physical isolation barriers between the work area and energized or operating equipment, forming a closed or semi-closed isolation zone, and retaining a single designated entrance and exit. Currently, the deployment and status monitoring of safety measures mainly rely on two methods: one is manual setup and regular inspection by operators; the other is remote monitoring using video surveillance systems in some important areas.

[0003] However, existing technologies have significant shortcomings: First, manual inspection is inefficient, has blind spots, and cannot achieve continuous real-time monitoring around the clock. It also relies on personnel responsibility and is prone to gaps in monitoring due to negligence or shift changes. Second, while video surveillance provides visual information, it is affected by factors such as installation angle, lighting conditions (e.g., nighttime, backlighting), equipment obstruction, and interference from the complex electromagnetic environment of substations, making it difficult to achieve reliable, all-weather, and comprehensive monitoring. More importantly, both manual inspection and video surveillance are "passive observation" or "post-event retrospective" in nature, unable to provide immediate and proactive detection and alarm when the mechanical connection status of the safety fence changes (e.g., the connecting clips are accidentally opened or intentionally removed). If on-site personnel temporarily move or cross the fence and fail to restore it properly, this safety hazard is difficult to detect in a timely manner, making it impossible to reliably guarantee the integrity of safety measures throughout the operation and posing a significant safety risk.

[0004] Therefore, there is an urgent need for an active monitoring technology that can be closely integrated with the physical structure of the fence, monitor the integrity of safety measures in real time and automatically, and issue audible and visual warnings and report remotely when the measures are damaged, in order to make up for the shortcomings of existing methods and improve the level of safety management at the work site. Summary of the Invention

[0005] The purpose of this invention is to provide an online monitoring device and detection method for telescopic fence security measures, which realizes real-time monitoring of fence security measures in an electrified closed loop and immediate alarm for damage.

[0006] To achieve the above objectives, the present invention employs the following technical solution: On the one hand, the present invention provides an online monitoring device for telescopic fence safety measures, including a monitoring host, a conductive monitoring line and a fixing clamp; The conductive monitoring line is laid on several telescopic fences that constitute a safety isolation area through the fixing clamps to form a continuous electrical monitoring loop; the first end of the electrical monitoring loop is electrically connected to the power output terminal and monitoring terminal of the monitoring host, and the end of the electrical monitoring loop is short-circuited or electrically connected to another monitoring terminal of the monitoring host, so that the electrical monitoring loop forms a closed loop. The monitoring host includes: The circuit monitoring module is used to apply monitoring signals to the electrical monitoring circuit and detect the on / off status of the electrical monitoring circuit in real time. An alarm control module, connected to the circuit monitoring module, is used to generate an alarm control signal when the circuit monitoring module detects that the electrical monitoring circuit is disconnected; A local alarm unit, connected to the alarm control module, is used to respond to the alarm control signal and issue a local audible and visual alarm. The communication module is connected to the alarm control module and is used to respond to the alarm control signal and send the alarm information of the safety measure failure to the remote monitoring backend.

[0007] Preferably, the conductive monitoring line is a cable with a waterproof male connector and a waterproof female connector; the fixing clamp is a U-shaped saddle clamp, which is used to fix the cable body of the conductive monitoring line to the vertical pole of the telescopic fence; the waterproof male connector and the waterproof female connector form a pluggable electrical connection node, which is configured to correspond to the mechanical connection buckle position between two adjacent telescopic fences and is integrated into a protective housing to form an integrated buckle connector.

[0008] On the other hand, the present invention also provides an online monitoring method for the safety measures of a retractable fence, applied to the above-mentioned online monitoring device for the safety measures of a retractable fence, the method comprising the following steps: Safety measure deployment and device initialization steps: When using several telescopic fences to form a closed safety isolation area, simultaneously lay the conductive monitoring line along the fence through fixing clamps, and connect the conductive monitoring lines on adjacent fences through male and female plugs to form a continuous electrical monitoring loop that runs through all fences; connect the two ends of the electrical monitoring loop to the corresponding ports of the monitoring host to complete the physical connection and power-on of the monitoring device. Real-time monitoring and status judgment steps: The monitoring host continuously applies a low-voltage DC or low-frequency AC monitoring signal to the electrical monitoring circuit through its internal circuit monitoring module, and collects the circuit's electrical parameters in real time, and judges the circuit's on / off status based on the electrical parameters; Alarm triggering and information reporting steps: When it is determined that the electrical monitoring circuit is in an open state, the monitoring host immediately triggers the alarm process, controls the local alarm unit to issue an audible and visual alarm, and at the same time sends an alarm message containing time and location information to the designated remote monitoring background through the communication module. Safety measure removal and device recovery steps: When the maintenance work is completed and the safety fence needs to be removed, first disconnect the power supply of the monitoring host, then disconnect each male and female plug connection point in sequence, and finally remove the conductive monitoring wire from the fence to complete the recovery of the device.

[0009] Preferably, in the safety measure deployment and device initialization step, the step of deploying the conductive monitoring wire along the fence using fixing clamps specifically involves: for each section of the telescopic fence, a conductive monitoring wire is fixed at the vertical pole positions at 1 / 3 and 2 / 3 of its length using U-shaped saddle clamps; the male and female ends of the corresponding conductive monitoring wires on adjacent sections of the fence are distributed opposite each other to facilitate the interlocking of the conductive monitoring wires when the fence is connected by clips.

[0010] Preferably, after completing the safety measures deployment and device initialization steps, a self-test step is performed: after the monitoring host is powered on, an internal system self-test is first performed, including power supply voltage, loop monitoring module function, and communication module link status; after the self-test passes, the normal operation indicator and communication normal indicator are lit, and the safety alarm indicator is turned off; at the same time, a device startup ready status message is sent to the remote monitoring backend through the communication module.

[0011] Preferably, in the alarm triggering and information reporting steps, the local alarm unit is controlled to issue an audible and visual alarm, specifically by: activating the voice chip pre-installed in the monitoring host to play a voice warning; at the same time, the red safety alarm indicator light is controlled to flash or remain constantly lit.

[0012] Preferably, in the alarm triggering and information reporting steps, sending an alarm message to the designated remote monitoring backend specifically involves: the communication module sending the alarm information to the monitoring server in the local area network in the form of TCP / IP messages through the trusted WLAN network within the substation; the alarm information includes at least the device's unique ID, alarm type, and alarm trigger time; after receiving the alarm information, the monitoring server can trigger the SMS platform to send alarm SMS messages to the mobile phones of preset relevant personnel.

[0013] Preferably, the real-time monitoring and status judgment steps also include a communication link self-check: the communication module of the monitoring host periodically performs handshake communication with the remote monitoring backend; if the handshake fails for a preset number of consecutive times, the communication link is determined to be abnormal, the monitoring host lights up the communication fault indicator and records the local log, but does not disconnect the monitoring of the electrical monitoring circuit; when the communication link is restored, the cached alarm information that was not successfully sent is automatically resent.

[0014] Preferably, in the real-time monitoring and status judgment step, the on / off state of the circuit is judged based on the electrical parameters, and a multi-level threshold delay judgment strategy is adopted, specifically including: When the loop resistance is detected to increase instantaneously to the first threshold, a short delay timer is started; If the loop resistance returns to the normal range within a short delay, it is determined to be interference and no alarm is triggered. If the loop resistance continues to be abnormal and further increases to the second threshold within a short delay, it will be immediately determined that the loop is broken and the alarm triggering and information reporting steps will be initiated. If the loop resistance is still between the first and second thresholds at the end of the short delay, a long delay timer is started; if it does not recover within the long delay, it is determined that the loop is abnormally disconnected, and the alarm triggering and information reporting steps are initiated.

[0015] Preferably, in the safety measure removal and device recovery steps, the safety measure removal and device recovery steps are as follows: after receiving the signal from the monitoring host that the device is powered off or the circuit is normally disconnected, the remote monitoring backend generates a work record that the safety measure has been removed; when the on-site personnel recover the device, they need to operate in sequence and close the protective cover of the male and female plugs to prevent the contacts from being contaminated for future use.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention forms a closed-loop electrical circuit by deploying conductive monitoring lines on the fence, which directly and continuously senses the mechanical connection status (on / off) of the fence. Any destructive behavior that causes the fence connection point to separate will immediately cause the circuit to break and be detected by the host, realizing active monitoring of the integrity of safety measures with millisecond-level response, and completely solving the time blind spots and judgment delay problems of manual inspection and video surveillance.

[0017] 2. Once damage is detected, the device simultaneously triggers a high-decibel voice alarm and a conspicuous eye indicator, which can immediately and effectively deter people who attempt to enter without authorization. At the same time, the alarm information is uploaded to the backend in real time via wireless network and pushed to relevant personnel, realizing remote synchronous monitoring and rapid emergency response, forming a three-dimensional security protection network.

[0018] 3. The device has a simple structure, and its core monitoring logic is based on the principle of circuit switching. It has strong anti-interference capabilities and is unaffected by factors such as light, weather, and obstructed view, making it suitable for complex electromagnetic environments such as substations. The installation method integrates with existing fence clips without changing the original work process. It is flexible in deployment and has self-testing and status indication functions, facilitating maintenance and management.

[0019] 4. The status of each stage of the device, including startup, normal monitoring, alarm, and dismantling, can be recorded and uploaded, forming a complete electronic ledger of safety measures. This provides an objective basis for subsequent safety analysis and responsibility determination, and promotes the standardization of safety management. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation of the fence plug-in wiring of the present invention; Figure 2 This is a schematic diagram of the main unit of the online monitoring device for telescopic fence safety measures of the present invention; Figure 3 This is the wiring diagram of the online monitoring device for the safety measures of the telescopic fence of the present invention; Figure 4 This is a flowchart of the method of the present invention.

[0021] The labels shown in the attached diagram are as follows: 1. Waterproof female connector; 2. Fence connector; 3. U-shaped saddle clip; 4. Waterproof male connector; 5. Telescopic fence. Detailed Implementation

[0022] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0023] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0024] Example: This embodiment provides a specific implementation plan for an online monitoring device and detection method for safety measures of retractable fences used during the maintenance of the main transformer in the equipment area of ​​a 220kV substation.

[0025] System overall structure and deployment scenario: like Figures 1 to 3As shown, the monitoring system in this embodiment mainly consists of three parts: a monitoring host, a conductive monitoring line, and fixing clamps. The deployment scenario is a safety isolation fence set up around the "main transformer maintenance area". This area needs to use 8 standard telescopic fence sections connected end to end to form a rectangular closed area, with only one entrance and exit about 1.2 meters wide reserved on the north side. The monitoring system is deployed on this closed fence link.

[0026] Detailed description of each component: 1. Monitoring host: Physical structure: It is an industrial-grade waterproof and dustproof enclosure, with dimensions of approximately 250mm*180mm*100mm. The front panel of the enclosure is equipped with multiple status indicator lights: a green "normal operation" indicator light, a green "sufficient power / normal power supply" indicator light, a green "normal communication" indicator light, and a red "safety alarm" indicator light. The panel also has a power switch, a system reset button, and a mute button. The side of the enclosure provides two aviation plug interfaces with waterproof locking nuts, marked "loop access +" and "loop access -" respectively, for connecting electrical monitoring circuits. Internal circuitry and functional modules: Main control unit: A low-power microcontroller (MCU) is used as the control core of the entire host; Loop monitoring module: Controlled by MCU, it includes a constant current source circuit and a high-precision ADC (analog-to-digital converter) sampling circuit. The constant current source can output a low-voltage DC safety monitoring signal of about 1mA and 12V (it can also be configured as a low-frequency AC signal to resist polarization). The ADC continuously samples the voltage between "loop access +" and "loop access -". The MCU calculates the loop resistance in real time using Ohm's law, which is the core electrical parameter for judging the on / off state. Alarm control module: Integrated into the software logic of the MCU, when an abnormality is detected in the circuit, the corresponding GPIO pin of the MCU outputs a high-level alarm control signal; Local alarm unit: includes a high-power voice synthesis chip and speaker, and a high-brightness red LED (i.e., "safety alarm" indicator). After receiving the alarm control signal, the voice chip drives the speaker to play a pre-recorded warning voice in a loop: "Please note that the safety fence measures have been compromised. Entry into non-working areas is prohibited. Please restore the safety measures immediately!" At the same time, the red LED flashes at a frequency of 1Hz. Communication module: It adopts an industrial-grade WLAN module, supports the 802.11b / g / n protocol, and is pre-configured with the SSID and authentication certificate of the trusted WLAN network in the substation, which can realize automatic and secure access and is used for TCP / IP communication with the background monitoring server of the local area network in the substation. Power module: Powered by a high-capacity lithium battery pack, and equipped with charge / discharge management circuitry and power detection circuitry. It can also be connected to an external 12V adapter via a side DC interface to provide power and charge the battery simultaneously.

[0027] 2. Conductivity monitoring line and fixing clamp: Conductivity monitoring cable: RVSP shielded soft copper core cable with a cross-sectional area of ​​0.75mm² is used. The outer sheath is made of oil-resistant and UV-resistant orange PVC material for easy identification. The length of each cable matches the length of a fully extended telescopic fence section (usually 1.5 meters or 2 meters). One end of the cable is crimped with a waterproof female connector, and the other end is crimped with a waterproof male connector. Both male and female connectors are aviation plug specifications with IP67 protection rating, threaded locking ring and rubber sealing ring. Fixtures: U-shaped saddle clamps (or U-shaped clamps) made of nylon are used. Their inner diameter is slightly larger than the sum of the diameter of the fence post and the outer diameter of the cable. The cable can be tightly bound to the fence post with the matching self-tapping screws to prevent it from shaking or falling off. Integrated snap-fit ​​connector: To further enhance reliability and convenience, this embodiment employs an improved design, integrating the waterproof male and female connector sockets into a high-strength ABS engineering plastic protective housing. The shape and size of this housing are specifically designed to integrate with the mechanical rotating snap-fit ​​(a common type of fence connector) at the ends of existing telescopic fences. Specifically, the bottom of the housing has a slot that matches the top of the fence vertical post, and both sides have lugs that engage with the locking tongue of the mechanical snap-fit. During installation, the operator simply aligns and snaps the mechanical snap-fit ​​of the two fence sections as usual. During this process, the male and female connectors, pre-installed in this integrated housing from the two fence sections, automatically align and connect as the snap-fit ​​is tightened. This achieves simultaneous and one-time completion of mechanical and electrical connections, greatly simplifying operation and ensuring that the electrical connection point and mechanical stress point are aligned, making monitoring more direct and reliable.

[0028] System installation and initialization: 1. Pre-installation of Fence and Monitoring Lines: Before deploying the fence, pre-install conductive monitoring lines for each section of the retractable fence to be used. With the fence fully extended, locate two vertical poles at 1 / 3 and 2 / 3 of its length. On each selected vertical pole, use two U-shaped clamps to fix the main body of one conductive monitoring line parallel to the ground. The key point is the orientation of the plugs of the monitoring lines on adjacent fence sections: It is agreed that the "direction of movement" (i.e., clockwise or counterclockwise when forming a closed area) of all fence sections should be consistent. Therefore, for any fence section, the monitoring line located at the front end in the direction of movement (i.e., the end to which the next fence section will connect) should be equipped with a female connector; the monitoring line located at the rear end in the direction of movement (i.e., the end to which the previous fence section connects) should be equipped with a male connector, thus forming a pattern of "opposite distribution" of male and female connectors. 2. Safety area layout and electrical circuit construction: Maintenance personnel transported the 8 sections of fence with pre-installed monitoring lines to the vicinity of the #1 main transformer in the conventional manner. The ends were connected by mechanical rotating buckles to form a rectangular enclosed area (with an entrance and exit). When connecting each pair of mechanical buckles, the use of integrated buckle connectors automatically completed the electrical connection of the corresponding male and female plugs during the mechanical locking process. If an integrated design is not used, the corresponding male and female plugs on the adjacent fences must be manually inserted and the locking rings tightened after the mechanical connection. 3. Circuit Connection to Host: After all fence connections are complete, a continuous conductor consisting of 8 monitoring wires connected in series through 7 connection points is formed along the entire fence link. This conductor is the "electrical monitoring circuit". Place the monitoring host in a corner of the rectangular area near the reserved entrance / exit (for convenient wiring and without obstructing passage). Locate the starting point of the electrical monitoring circuit (i.e., any point on the fence link can be chosen as the starting point; theoretically, it can be any location, but usually a location close to the host is chosen), cut its wire (or use the reserved terminal block), and separate two wire cores. Connect one wire core (considered the beginning of the circuit) to the host's "Circuit Access+" port; the other wire core (considered the end of the circuit) can be: (1) Short-circuit mode: Directly connect to the host “loop access-” port. At this time, the host uses two-wire monitoring. The monitoring signal flows out from “+”, through the entire loop, and flows back from “-”. (2) End-of-line return mode (not explicitly shown in the figure but a common variation): The wire core continues to be laid along the fence link (keeping insulated from the first wire core), goes around the entire fence, and then returns to the host and connects to the "loop access-" port; This mode forms a physically complete ring network and has a certain ability to locate breakpoints, but the wiring is slightly more complex. This embodiment uses a simple short-circuit mode, such as... Figure 3 The wiring diagram is shown below; 4. System Power-On and Self-Test: Connect the host power supply (this embodiment uses the built-in battery), turn on the host power switch, the host MCU starts, and performs the following self-tests in sequence: Power self-test: The power module reports the battery voltage. If it is higher than the minimum operating voltage (e.g., 11V), the "Power Full" indicator light will stay on. Loop self-test: The loop monitoring module applies a monitoring signal to the newly connected electrical monitoring loop. The MCU detects the initial loop resistance. If the resistance value is within a preset reasonable range (e.g., the theoretical value calculated based on the total length of the fence and the resistivity of the cable ±10%), the loop connection is considered normal and the "normal operation" indicator light stays on. If the resistance is infinite (open circuit) or far below the normal value (short circuit), the indicator light flashes as an alarm. Communication self-test: The communication module attempts to connect to the preset WLAN network and establish a TCP connection with the LAN background monitoring server (IP address pre-configured), sending a "handshake" heartbeat packet. If a confirmation reply is received from the server, the "Communication Normal" indicator light will remain on. After all the above self-tests pass, the red "Safety Alarm" indicator light remains off. At the same time, the communication module immediately sends a "Device Start-up Ready" message to the backend server. The message includes: Device ID (e.g., "YT-01"), status ("Start"), timestamp, and initial loop resistance value. The backend server can then generate an electronic record of the safety measures deployment based on this information and automatically trigger the SMS platform to send a notification SMS to the mobile phones of the work supervisor, safety officer, and other pre-assigned personnel, stating that "The safety fence and monitoring system for the main transformer maintenance area have been deployed and started."

[0029] Real-time monitoring and intelligent judgment: After the system initialization is completed, it enters a 24 / 7 uninterrupted monitoring state. The circuit monitoring module in the host continuously applies a constant current of 1mA to the electrical monitoring circuit at a frequency of 10 times per second, and samples the voltage to calculate the circuit resistance R. 1. Basic continuity judgment: Under normal circumstances, the loop resistance R is stable near the basic resistance value R0 (for example, the total length of 8 sections of fence is about 24 meters, the cable resistance is about 0.5 ohms, plus the contact resistance, R0 is about 0.8-1.5 ohms). The MCU sets a circuit breaker threshold R_open (for example, 10 kiloohms). When R is detected to be greater than R_open, it is immediately determined that "the loop is open". 2. Multi-level threshold delay judgment strategy: To distinguish between genuine fence damage and instantaneous environmental disturbances (such as a person slightly touching a plug, electromagnetic pulse, etc.), this embodiment adopts a more intelligent judgment logic: The first threshold R1 is set to a value that is significantly higher than R0 but much lower than R_open, such as 100 ohms. When an instantaneous jump of R to a value greater than R1 is detected, the MCU determines it as a "suspected anomaly" but does not immediately trigger an alarm. Instead, it starts a short delay timer T1 (set to 1 second). During timeout T1: If R drops and recovers to a normal range of less than R1 within 1 second, it is determined to be a transient interference, the system ignores this event and continues monitoring; If R remains abnormal during T1 and further increases sharply to exceed the second threshold R2 (set to 1 kiloohm), it indicates that the connection point is likely to be completely disconnected. At this time, the system will immediately determine "loop disconnection" without waiting for T1 to end and jump to the alarm process. If timer T1 ends (1 second elapsed), and the value of R remains between R1 (100 ohms) and R2 (1 kiloohms), for example, stable at 500 ohms, this state may correspond to a "sub-healthy" state such as the plug being partially pulled out or the contact being severely poor but not completely disconnected. The system will then start a long delay timer T2 (set to 8 seconds). During the T2 timeout: R is continuously monitored. If R recovers to less than R1 within 8 seconds, it is determined that the temporary poor contact has been resolved and the system alarm is cleared. If R has not recovered by the end of the T2 timeout, it is determined that the abnormal disconnection is ongoing and the system determines that the circuit is "disconnected" and triggers an alarm. This strategy effectively prevents false alarms caused by minor disturbances, while ensuring reliable capture of real destructive behavior. 3. Communication Link Persistence Self-Check: While monitoring in real time, the communication module sends a heartbeat packet to the backend server every 30 seconds to keep the TCP connection active. If no response is received from the server for three consecutive times (i.e., 90 seconds), the MCU determines that the "communication link is abnormal". At this time, the "communication normal" indicator light on the front panel of the host changes from solid green to flashing (or off). The system records a communication fault log in the local non-volatile memory. The system continues to perform monitoring and judgment. Once an alarm is triggered, the alarm control signal will start the local audible and visual alarm as usual, and at the same time, the alarm information will be stored in a "waiting to be sent buffer queue". When the communication module detects that the network has recovered and re-established a connection with the server, it will automatically check the buffer queue and resend all the unsent alarm information in the queue to the server in chronological order to ensure the integrity of the alarm information.

[0030] Alarm triggering and linkage response: When the system determines "circuit disconnection" through the above logic, it immediately enters the alarm triggering process with almost no delay (excluding possible anti-interference delay, the maximum is no more than 9 seconds, and for actual damage, it is usually determined within 1 second). 1. Local alarm activation: Sound alarm: The alarm control module triggers the voice chip, which drives the speaker to play preset voice warnings in a loop at a sound pressure level of no less than 85 decibels. The powerful sound is enough to attract the attention of nearby personnel in a noisy substation environment, and form an immediate and effective on-site deterrent to people who attempt to enter illegally or unintentionally damage the fence. Light alarm: The red "safety alarm" indicator light changes from being off to flashing at a high frequency (e.g., 2Hz), making it particularly noticeable at night or in dimly lit places; Upon hearing or seeing the alarm, on-site personnel (such as the work supervisor or safety monitor) should immediately go to check to confirm whether the fence was blown down by the wind, accidentally touched by someone, or caused by other reasons, and take measures to restore the fence connection. 2. Remote information reporting and linkage: Simultaneously, the alarm control module triggers the communication module. The communication module immediately constructs a "Security Measures Violation Alarm" TCP / IP message and sends it to the backend monitoring server via the connected WLAN network. The message content includes at least: {"DeviceID":"YT-01","AlarmType":"FENCE_BREAK","Timestamp":"2023-10-2714:35:22","Resistance":"INF"}; After receiving the alarm message, the backend server performs the following actions: Real-time display: On the graphical interface of the substation safety monitoring system, the location icon representing the main transformer maintenance area immediately turns red and flashes, while the detailed information of the alarm pops up. Audio alert: An alarm sounded in the monitoring room; Record storage: Alarm information is permanently stored in the database to form an unalterable security event log; SMS push (linkage): The server calls the integrated SMS gateway interface to automatically send alarm SMS messages to a preset list of responsible personnel (such as the work supervisor, station manager, and safety specialist), for example: "[Substation Safety Alarm] Equipment YT-01 reported at 14:35 that the fence measures were compromised. Please check immediately! #1 Main Transformer Maintenance Area"; This process enables multi-level, three-dimensional alarms, from on-site perception to remote monitoring and then to personnel mobile terminals, ensuring that relevant personnel can be informed of safety anomalies immediately, regardless of their location within the station, thus greatly shortening emergency response time.

[0031] Alarm recovery and system reset: When on-site personnel reconnect the damaged fence (e.g., by re-fastening the dislodged clips, the integrated connector regains electrical connection), the electrical monitoring circuit is restored. The main circuit monitoring module detects that the resistance R has returned to the normal range (less than R1); 1. The local alarm unit immediately stops playing the voice message, and the red "Safety Alarm" indicator light changes from flashing to turning off; 2. Simultaneously, the host sends an "alarm recovery" status message to the backend server via the communication module: {"DeviceID":"YT-01","Status":"NORMAL","Timestamp":"2023-10-2714:38:05"}; 3. The backend server updates the monitoring interface status, the icon returns to green, and records the alarm recovery time and operation loop.

[0032] Work completion and equipment recovery: After all the maintenance work on the main transformer was completed, the safety measures were removed with the permission of the person in charge of the work.

[0033] 1. Power failure of the host: First, go to the monitoring host and turn off the power switch. Before the power failure, the host MCU will send a final status message to the background server through the communication module, indicating "device shutdown" or "circuit normally disconnected (planned)". 2. Background record generation: After receiving this signal, the background server will automatically generate a final record of "Safety measures have been lifted" in the electronic safety log of this operation, marking the safety closure of this fence protection task. 3. On-site recycling: On-site personnel proceed as follows: Disconnect the aviation connectors for "loop access +" and "loop access -" on the main unit; Along the fence link, open the mechanical latches between each fence section in sequence. When the mechanical latches are opened, the integrated latch connectors separate and the male and female plugs automatically disconnect. If an integrated design is not used, you need to manually unscrew and unplug the electrical plugs before opening the mechanical latches. Retract each section of the fence and untie the U-shaped saddle clips securing the conductive monitoring wires, then remove the monitoring wires from the fence. When storing conductive monitoring wires, the rubber protective caps of the male and female connectors must be tightened to protect their metal contacts from dust, moisture or mechanical damage, and to ensure good contact for the next use. After inventorying the main unit, all monitoring lines and clamps, put them back into the special toolbox to complete the recycling.

[0034] The foregoing detailed description of preferred embodiments of the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and all such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

[0035] The above is a detailed description of the preferred embodiments of the present invention, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An online monitoring device for retractable fence safety measures, characterized in that, Includes the monitoring host, conductive monitoring line, and fixing fixture; The conductive monitoring line is laid on several telescopic fences that constitute a safety isolation area through the fixing clamps to form a continuous electrical monitoring loop; the first end of the electrical monitoring loop is electrically connected to the power output terminal and monitoring terminal of the monitoring host, and the end of the electrical monitoring loop is short-circuited or electrically connected to another monitoring terminal of the monitoring host, so that the electrical monitoring loop forms a closed loop. The monitoring host includes: The circuit monitoring module is used to apply monitoring signals to the electrical monitoring circuit and detect the on / off status of the electrical monitoring circuit in real time. An alarm control module, connected to the circuit monitoring module, is used to generate an alarm control signal when the circuit monitoring module detects that the electrical monitoring circuit is disconnected; A local alarm unit, connected to the alarm control module, is used to respond to the alarm control signal and issue a local audible and visual alarm. The communication module is connected to the alarm control module and is used to respond to the alarm control signal and send the alarm information of the safety measure failure to the remote monitoring backend.

2. The online monitoring device for telescopic fence safety measures according to claim 1, characterized in that, The conductive monitoring line is a cable with a waterproof male and a waterproof female connector; the fixing clamp is a U-shaped saddle clamp, which is used to fix the cable body of the conductive monitoring line to the vertical pole of the telescopic fence; the waterproof male and waterproof female connectors form a pluggable electrical connection node, which is configured to correspond to the mechanical connection buckle position between two adjacent telescopic fences and is integrated into a protective housing to form an integrated buckle connector.

3. A method for online monitoring of safety measures of a telescopic fence, applied to the monitoring device as described in claim 1 or 2, characterized in that, The method includes the following steps: Safety measure deployment and device initialization steps: When using several telescopic fences to form a closed safety isolation area, simultaneously lay the conductive monitoring line along the fence through fixing clamps, and connect the conductive monitoring lines on adjacent fences through male and female plugs to form a continuous electrical monitoring loop that runs through all fences; connect the two ends of the electrical monitoring loop to the corresponding ports of the monitoring host to complete the physical connection and power-on of the monitoring device. Real-time monitoring and status judgment steps: The monitoring host continuously applies a low-voltage DC or low-frequency AC monitoring signal to the electrical monitoring circuit through its internal circuit monitoring module, and collects the circuit's electrical parameters in real time, and judges the circuit's on / off status based on the electrical parameters; Alarm triggering and information reporting steps: When it is determined that the electrical monitoring circuit is in an open state, the monitoring host immediately triggers the alarm process, controls the local alarm unit to issue an audible and visual alarm, and at the same time sends an alarm message containing time and location information to the designated remote monitoring background through the communication module. Safety measure removal and device recovery steps: When the maintenance work is completed and the safety fence needs to be removed, first disconnect the power supply of the monitoring host, then disconnect each male and female plug connection point in sequence, and finally remove the conductive monitoring wire from the fence to complete the recovery of the device.

4. The online monitoring method for safety measures of a telescopic fence according to claim 3, characterized in that, In the steps of safety measure deployment and device initialization, the step of laying the conductive monitoring wire along the fence using fixing clamps is as follows: for each section of telescopic fence, a conductive monitoring wire is fixed with a U-shaped saddle clamp at the vertical pole position at 1 / 3 and 2 / 3 of its length; the male and female ends of the corresponding conductive monitoring wires on adjacent sections of fence are distributed opposite each other to facilitate the interlocking of conductive monitoring wires when the fence is connected by buckles.

5. The online monitoring method for safety measures of a telescopic fence according to claim 3, characterized in that, After completing the safety measures deployment and device initialization steps, a self-test step is performed: After the monitoring host is powered on, it first performs an internal system self-test, which includes power supply voltage, loop monitoring module function, and communication module link status; after the self-test passes, the normal operation indicator and communication normal indicator are lit, and the safety alarm indicator is turned off; at the same time, a device startup ready status message is sent to the remote monitoring backend through the communication module.

6. The online monitoring method for safety measures of a telescopic fence according to claim 3, characterized in that, In the alarm triggering and information reporting steps, the local alarm unit is controlled to issue an audible and visual alarm. Specifically, the voice chip preset in the monitoring host is activated to play a voice warning; at the same time, the red safety alarm indicator light is controlled to flash or remain constantly lit.

7. The online monitoring method for safety measures of a telescopic fence according to claim 3, characterized in that, In the alarm triggering and information reporting steps, sending alarm messages to the designated remote monitoring backend specifically involves the communication module sending the alarm information to the monitoring server in the local area network in the form of TCP / IP messages through the trusted WLAN network within the substation; the alarm information includes at least the device's unique ID, alarm type, and alarm trigger time. After receiving the message, the monitoring server can trigger the SMS platform to send alarm SMS messages to the mobile phones of relevant personnel.

8. The online monitoring method for safety measures of a telescopic fence according to claim 3, characterized in that, The real-time monitoring and status judgment steps also include communication link self-check: the communication module of the monitoring host periodically performs handshake communication with the remote monitoring backend; if the handshake fails for a preset number of consecutive times, the communication link is determined to be abnormal, the monitoring host lights up the communication fault indicator and records the local log, but does not disconnect the monitoring of the electrical monitoring circuit; when the communication link is restored, the cached alarm information that was not successfully sent is automatically resent.

9. The online monitoring method for safety measures of a telescopic fence according to claim 8, characterized in that, In the real-time monitoring and status judgment step, the on / off state of the circuit is determined based on the electrical parameters, and a multi-level threshold delay judgment strategy is adopted, specifically including: When the loop resistance is detected to increase instantaneously to the first threshold, a short delay timer is started; If the loop resistance returns to the normal range within a short delay, it is determined to be interference and no alarm is triggered. If the loop resistance continues to be abnormal and further increases to the second threshold within a short delay, it will be immediately determined that the loop is broken and the alarm triggering and information reporting steps will be initiated. If the loop resistance is still between the first and second thresholds at the end of the short delay, a long delay timer is started; if it does not recover within the long delay, it is determined that the loop is abnormally disconnected, and the alarm triggering and information reporting steps are initiated.

10. The online monitoring method for safety measures of a telescopic fence according to claim 3, characterized in that, In the safety measure removal and device recovery steps, the specific steps are as follows: After receiving a signal from the monitoring host indicating that the device is powered off or the circuit is normally disconnected, the remote monitoring backend generates a work record indicating that the safety measure has been removed; when recovering the device, on-site personnel must operate in sequence and close the protective covers of the male and female plugs to prevent contact damage for future use.

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