Intelligent substation equipment signboard control method and device

Abstract

The invention provides an intelligent substation equipment signboard control method and device, and relates to the technical field of intelligent safety equipment of a power system, and the method comprises the steps: executing hardware and communication initialization, and carrying out power management detection; when it is detected that the current voltage meets the normal operation condition, based on a preset priority strategy, comprehensive judgment is conducted on a five-prevention system operation instruction, an intelligent grounding device state signal and local manually-set state information, a target working mode is determined, and corresponding prompt information is output; prompt information is dynamically adjusted in response to the change of the surrounding environment, and the prompt information comprises a light mode and voice content; and acquiring operation state information, periodically uploading the operation state information to a remote monitoring system, and switching to a degraded operation mode when abnormal communication is detected. According to the invention, through multi-source information fusion, priority dynamic decision, environment adaptive prompt and a communication fault-tolerant mechanism, intelligent and high-reliability operation of substation field safety prompt is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent safety equipment of power system, and particularly relates to a control method and device for an intelligent substation equipment signboard. BACKGROUND

[0002] As a key hub of the power system, the operation safety of a substation highly depends on the accurate identification of equipment states and the strict specification of operation processes. In recent years, with the advancement of the construction of intelligent substations, automation systems such as the five-prevention system (to prevent misoperation of circuit breakers, to prevent live-line closing of disconnectors, to prevent live-line grounding, to prevent misoperation of grounding switches, and to prevent misoperation of entering live compartments) and intelligent grounding devices have gradually become popular, which puts forward higher requirements for on-site human-machine interaction terminals. However, the traditional equipment signboard is only used for static information display and has been difficult to meet the needs of dynamic safety prompts, operation guidance and multi-system linkage. Therefore, electronic signboards are gradually promoted in the field of intelligent substations.

[0003] However, the electronic signboard in the prior art still has obvious deficiencies: on the one hand, its function is relatively single, usually only supporting fixed content display or simple flashing alarm, and it cannot make dynamic decisions according to multi-source information such as five-prevention instructions, grounding states, and personnel proximity; on the other hand, it lacks deep integration with the core systems of the substation, and it cannot receive operation step instructions of the five-prevention system to realize visual guidance, nor can it automatically identify wireless state signals of the intelligent grounding device, resulting in a prominent information island problem. These problems restrict the large-scale application of electronic signboards in outdoor substation environments.

[0004] Therefore, a signboard control method and device that is intelligent, low-power, highly reliable and strongly linked are in urgent need of research. SUMMARY

[0005] In view of the deficiencies in the prior art, the present application provides a control method and device for an intelligent substation equipment signboard, which solves the technical problems of single content display, lack of integration with core systems of the substation, low intelligent level and low linkage capability of the electronic signboard in the prior art.

[0006] In one aspect, the present application provides a control method for an intelligent substation equipment signboard, applied to the intelligent substation equipment signboard, and the method comprises: performing hardware initialization and communication initialization, and performing power management detection; when it is detected that the current voltage meets the normal operation condition, based on a preset priority strategy, comprehensively judging the five-prevention system operation instruction, the intelligent grounding device state signal and the state information of the local manual setting obtained, determining a target working mode to be executed, and outputting prompt information corresponding to the target working mode; The prompt information is dynamically adjusted in response to changes in the surrounding environment, wherein the prompt information includes lighting mode and voice content; The system acquires operational status information and periodically uploads it to a remote monitoring system. When a communication anomaly is detected, it switches to a degraded operation mode.

[0007] Optionally, based on a preset priority strategy, the acquired five-proof system operation instructions, intelligent grounding device status signals, and locally manually set status information are comprehensively judged to determine the target working mode to be executed, and the corresponding prompt information of the target working mode is output. This includes: when an operation step instruction issued by the five-proof system is received, the target working mode is set to the five-proof operation guidance mode, and five-proof operation guidance information is output based on the five-proof operation guidance mode; when no operation step instruction issued by the five-proof system is received, but a wireless grounding status signal from the intelligent grounding device is received, the target working mode is set to the intelligent grounding prompt mode, and grounding status prompt information is output based on the intelligent grounding prompt mode; when no operation step instruction issued by the five-proof system is received, and no wireless grounding status signal from the intelligent grounding device is received, locally manually set status information is acquired, the target working mode is set to the manual execution status mode according to the status information, and manual execution status information is output based on the manual execution status mode.

[0008] Optionally, when the locally manually set status information is "running status", the target working mode is set to "running status mode", and running status prompt information is output based on the "running status mode"; when the locally manually set status information is "maintenance status", the target working mode is set to "maintenance status mode", and maintenance status prompt information is output based on the "maintenance status mode"; when the locally manually set status information is "fault status", the target working mode is set to "fault status mode", and running status prompt information is output based on the "fault status mode".

[0009] Optionally, the step of dynamically adjusting the prompt information in response to the surrounding environment of the target sign includes: when the target operating mode is the running state mode, outputting the operating state prompt information including a first visual prompt for representing live operation, and simultaneously triggering a voice prompt and a corresponding dynamic visual prompt for warning of live risk when personnel are detected approaching; when the target operating mode is the maintenance state mode, outputting the operating state prompt information including a second visual prompt for representing maintenance status, and switching to a third visual prompt for representing grounded status when a valid grounding signal is detected, while playing a grounding status voice prompt; when no valid grounding signal is detected, maintaining the second visual prompt and not responding to personnel approaching; when the target operating mode is the fault state mode, outputting the operating state prompt information including a fourth visual prompt for representing abnormal status, and prohibiting the triggering of any voice prompts.

[0010] Optionally, when the target operating mode is the five-proof operation guidance mode, five-proof operation guidance information is output based on the five-proof operation guidance mode, and an operation timer is started simultaneously. The five-proof operation guidance information includes an operation step frequency light prompt and a voice prompt associated with the operation step frequency light prompt. When the target operating mode is the intelligent grounding prompt mode, grounding status prompt information is output based on the intelligent grounding prompt mode, and a grounding event log is recorded simultaneously. The grounding status prompt information includes an alternating flashing light prompt and a voice prompt for warning of the grounding status.

[0011] Optionally, the power management detection includes: acquiring the current voltage of the target sign and comparing the current voltage with a preset voltage threshold; when the current voltage is lower than the voltage threshold, activating a low-power operation state, wherein the low-power operation state includes reducing lighting brightness and limiting voice broadcasting function; when the current voltage is higher than or equal to the voltage threshold, determining that the current voltage meets the normal operating conditions, collecting ambient light intensity, and automatically adjusting the lighting brightness based on the ambient light intensity.

[0012] Optionally, after switching to a degraded operating mode when a communication anomaly is detected, the method further includes: enabling a watchdog mechanism to monitor the operating status; and resetting based on the watchdog mechanism when an abnormal operating status is detected.

[0013] Another aspect of the present invention provides a control device for intelligent substation equipment identification signs, used to implement the intelligent substation equipment identification sign control method as described in any of the preceding claims, comprising: Physical signage; The execution and output module is used to output lighting modes and voice prompts according to control commands. The sensing and input module is used to acquire local manual setting status, personnel proximity signals, and ambient light intensity; The wireless communication module is used to receive operation commands from the five-prevention system and status signals from the intelligent grounding device, and to interact with the remote monitoring system. The power module is used to supply power to various functional modules and to realize power management monitoring and low power management. The core control unit is located in the sensing and input module and is electrically connected to the execution and output module, the wireless communication module and the power module, respectively. It is used to perform hardware and communication initialization, power management detection, and comprehensively judge multi-source input information based on a preset priority strategy to determine the target working mode and output corresponding prompt information. The core control unit is also configured to dynamically adjust the prompt information in response to changes in the surrounding environment, periodically upload operating status information to the remote monitoring system, and switch to a degraded operating mode when a communication anomaly is detected.

[0014] Optionally, the wireless communication module includes: a ZigBee communication unit for wireless communication with the intelligent grounding device; a WiFi communication unit for establishing a connection with the five-proof system and receiving operation commands; and an NB-IoT communication unit for periodically uploading operating status information to the remote monitoring system. The core control unit communicates with the ZigBee communication unit and the WiFi communication unit via a serial port and controls the NB-IoT communication unit via an AT command set. When any communication channel is detected to be abnormal, the core control unit automatically switches to a degraded operation mode.

[0015] Optionally, the sensing and input module includes: a device status switching switch for manually setting the device to be in operation, maintenance, or fault state; a personnel detection sensor for detecting whether personnel are approaching the sign; and an ambient light sensor for collecting the current light intensity. The core control unit reads the status of the device status switching switch through the GPIO interface, responds to the trigger signal of the personnel detection sensor through an interrupt, and collects the analog signal of the ambient light sensor through the ADC interface to achieve real-time sensing of local status and environmental information.

[0016] The intelligent substation equipment identification sign control method and device provided by this invention firstly ensures stable startup and operation of the device in complex outdoor power supply environments by performing hardware and communication initialization and combining power management detection. Secondly, based on a preset priority strategy, it comprehensively judges the operation commands of the five-prevention system, the status signals of the intelligent grounding device, and the local manual status, realizing proactive identification and priority response to high-safety-level events, breaking through the limitations of traditional signs that can only display statically or provide simple alarms. Thirdly, it dynamically adjusts the lighting and voice prompts by sensing changes in the surrounding environment, making the prompt information both visual and adaptable, improving the level of intelligence in human-computer interaction. Finally, by periodically uploading the operating status and automatically switching to a degraded operating mode when communication is abnormal, it ensures data synchronization with the remote monitoring system and maintains basic safety prompt functions when the link is interrupted, significantly enhancing the reliability and availability of the system at the substation site. The above method overcomes the problems of traditional electronic signs, such as single function, lack of system linkage, and insufficient reliability, through multi-source information fusion, dynamic priority decision-making, environmental adaptive prompts, and communication fault tolerance mechanisms, realizing intelligent and highly reliable operation of safety prompts at the substation site.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 A schematic diagram of the overall process of the intelligent substation equipment identification plate control method provided in one embodiment of this application; Figure 2 This application provides a schematic diagram of the control flow of the priority strategy in an embodiment of the intelligent substation equipment identification plate control method. Figure 3 A schematic diagram of the overall structure of the intelligent substation equipment identification sign control device in one embodiment of this application. Detailed Implementation

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] This invention provides a control method for intelligent substation equipment identification signs, applicable to intelligent substation equipment identification signs, such as... Figure 1 As shown, the method includes: performing hardware initialization and communication initialization, and conducting power management detection; when the current voltage is detected to meet the normal operating conditions, based on a preset priority strategy, comprehensively judging the acquired five-proof system operation commands, intelligent grounding device status signals, and locally manually set status information to determine the target operating mode to be executed, and outputting the prompt information corresponding to the target operating mode; dynamically adjusting the prompt information in response to changes in the surrounding environment, wherein the prompt information includes light mode and voice content; acquiring operating status information, periodically uploading the operating status information to the remote monitoring system, and switching to a degraded operating mode when a communication anomaly is detected.

[0024] The intelligent substation equipment identification sign control method provided by this invention firstly ensures stable startup and operation of the device in complex outdoor power supply environments by performing hardware and communication initialization and combining power management detection. Secondly, based on a preset priority strategy, it comprehensively judges the operation commands of the five-prevention system, the status signals of the intelligent grounding device, and the local manual status, realizing proactive identification and priority response to high-safety-level events, breaking through the limitations of traditional signs that can only display statically or provide simple alarms. Thirdly, it dynamically adjusts the lighting and voice prompts by sensing changes in the surrounding environment, making the prompt information both visual and adaptable, improving the level of intelligence in human-machine interaction. Finally, by periodically uploading the operating status and automatically switching to a degraded operating mode when communication is abnormal, it ensures data synchronization with the remote monitoring system and maintains basic safety prompt functions when the link is interrupted, significantly enhancing the reliability and availability of the system at the substation site. The above method overcomes the problems of traditional electronic signs, such as single function, lack of system linkage, and insufficient reliability, through multi-source information fusion, dynamic priority decision-making, environmental adaptive prompts, and communication fault tolerance mechanisms, realizing intelligent and highly reliable operation of safety prompts at the substation site.

[0025] Specifically, in the above embodiments, based on a preset priority strategy, the acquired five-proof system operation instructions, intelligent grounding device status signals, and locally manually set status information are comprehensively judged to determine the target working mode to be executed, and the prompt information corresponding to the target working mode is output, including: when an operation step instruction issued by the five-proof system is received, the target working mode is set to the five-proof operation guidance mode, and five-proof operation guidance information is output based on the five-proof operation guidance mode; when no operation step instruction issued by the five-proof system is received, but a wireless grounding status signal from the intelligent grounding device is received, the target working mode is set to the intelligent grounding prompt mode, and grounding status prompt information is output based on the intelligent grounding prompt mode; when no operation step instruction issued by the five-proof system is received, and no wireless grounding status signal from the intelligent grounding device is received, the locally manually set status information is obtained, the target working mode is set to the manual execution status mode according to the status information, and manual execution status information is output based on the manual execution status mode.

[0026] In this embodiment, such as Figure 2As shown, after initialization and confirmation of normal power supply, the device continuously monitors three types of key status signals: first, operation instructions from the five-proof system (such as opening, closing, and grounding); second, wireless grounding status signals from the intelligent grounding device (indicating whether the grounding wire has been connected or disconnected); and third, the manual status set by the local device status conversion switch (including operation, maintenance, and fault modes). The system arbitrates the above information in real time according to a preset three-level priority strategy: the first priority is the operation instructions from the five-proof system. Once a valid five-proof operation instruction is received, regardless of the current status, the system immediately interrupts the original prompting logic and sets the target working mode to the five-proof operation guidance mode. In this mode, the core control unit parses the instruction type and drives the audio-visual output module to execute prompting actions strictly corresponding to the operation, such as outputting a specific frequency light flashing sequence and simultaneously playing guiding voice, forming intuitive and executable on-site guidance. The second priority is the status signal of the intelligent grounding device. When no five-prevention command is detected but a valid grounding status signal (such as grounded or grounding abnormal) is received from the intelligent grounding device, the system switches the target working mode to the intelligent grounding prompt mode. At this time, the device outputs a specially designed grounding warning prompt (such as alternating red and yellow flashing lights and the voice "Warning, there is a grounding wire here") to prevent accidental operation of live equipment or accidental disconnection of the grounding wire. At the same time, it records the grounding event log and reports it to the five-prevention system to achieve closed-loop management of the grounding status. The third priority is the local manual setting state. Only when there is neither a five-prevention command nor an intelligent grounding signal will the system adopt the setting value of the local state conversion switch and enter the manual execution state mode. In this mode, the device enters the running, maintenance or fault state according to the switch position and outputs the corresponding basic prompt information (such as a solid green light for running, a slow flashing yellow light for maintenance, and a fast flashing red light for fault) as a routine status indication for daily operation and maintenance.

[0027] The priority strategy provided in this application ensures that safety-critical events (such as five-prevention operations and grounding alarms) always receive the highest response priority, effectively avoiding confusion or omissions caused by multi-source information conflicts, significantly improving the safety and standardization of substation on-site operations. At the same time, all state transitions are accompanied by clear visual and auditory feedback, enabling maintenance personnel to quickly and accurately understand the current equipment status and the operations to be performed, thus achieving the goal of intelligent human-machine interaction.

[0028] Furthermore, such as Figure 2As shown, when the locally manually set status information is "Running Status", the target working mode is set to "Running Status Mode", and "Running Status Prompt Information" is output based on the "Running Status Mode"; when the locally manually set status information is "Maintenance Status", the target working mode is set to "Maintenance Status Mode", and "Maintenance Status Prompt Information" is output based on the "Maintenance Status Mode"; when the locally manually set status information is "Fault Status", the target working mode is set to "Fault Status Mode", and "Running Status Prompt Information" is output based on the "Fault Status Mode".

[0029] Furthermore, the system dynamically adjusts the prompting information in response to the surrounding environment of the target sign, including: when the target's operating mode is in the running state mode, outputting operating status prompting information including a first visual prompt representing live operation, and simultaneously triggering a voice prompt and corresponding dynamic visual prompt to warn of live risks when personnel are detected approaching; when the target's operating mode is in the maintenance state mode, outputting operating status prompting information including a second visual prompt representing the maintenance state, and switching to a third visual prompt representing the grounded state when a valid grounding signal is detected, while simultaneously playing a grounding status voice prompt; when no valid grounding signal is detected, maintaining the second visual prompt and not responding to personnel approaching; when the target's operating mode is in the fault state mode, outputting operating status prompting information including a fourth visual prompt representing the abnormal state, and prohibiting the triggering of any voice prompts.

[0030] In this embodiment, when the system does not receive the five-prevention system operation command and does not detect the effective status signal of the intelligent grounding device, it will enter the manual execution state mode according to the physical location of the local equipment state conversion switch, and further subdivide it into the operation state mode, maintenance state mode and fault state mode to provide basic safety prompts that match the actual working conditions.

[0031] Specifically, when the local state transition switch is in the running position, the core control unit sets the target operating mode to the running state mode. In this mode, the device controls the LED lighting module to output a first visual cue (e.g., a solid green light) to indicate that the equipment is energized, serving as a regular operating indicator. Simultaneously, the system continuously monitors the area around the sign using personnel detection sensors (e.g., infrared dual-technology sensors). Once personnel are detected, a dynamic safety warning mechanism is immediately triggered: on one hand, the LED switches to a dynamic visual cue (e.g., a blue flashing light) to warn of energization risks; on the other hand, the sound and light alarm module is simultaneously activated to play a preset voice prompt (e.g., "Equipment is energized, be careful"), which continues for a preset time before automatically reverting to the basic operating cue, thus achieving proactive protection. When the local state transition switch is in the maintenance position, the core control unit sets the target operating mode to the maintenance state mode. At this time, the device first outputs a second visual cue (e.g., a slow-flashing yellow light) to indicate that the equipment is under maintenance. To further enhance the safety of maintenance operations, the system also actively queries the wireless status of the intelligent grounding device. If a valid grounding signal is received... If no grounding signal is detected, the system switches to a third visual cue (e.g., alternating red and yellow flashing) to indicate grounding, and plays a grounding status voice prompt (e.g., warning, there is a grounding wire here). If no grounding signal is detected, the system maintains a slow yellow flashing state. In this state, even if personnel are detected approaching, no additional voice or dynamic light prompts are triggered to avoid interfering with normal maintenance procedures. This also clearly distinguishes between ungrounded maintenance and live operation scenarios. When the local status switch is in the fault position, the core control unit sets the target operating mode to the fault state mode. The device outputs a fourth visual cue (e.g., rapidly flashing red light) to indicate equipment abnormality, providing high visibility to warn of equipment faults or abnormalities and prohibiting any operation. In this mode, no form of voice prompt is allowed. Regardless of whether personnel are detected approaching, only the rapidly flashing red light is maintained to prevent information interference or misjudgment. These three manual status modes not only accurately map the basic operating conditions of substation equipment, but also construct a hierarchical basic safety prompt through differentiated audio-visual strategies (including whether to respond to personnel approaching, whether to link grounding status, and whether to enable voice prompts), meeting the needs of on-site safety management.

[0032] Specifically, in the above embodiments, when the target working mode is the five-proof operation guidance mode, five-proof operation guidance information is output based on the five-proof operation guidance mode, and an operation timer is started at the same time. The five-proof operation guidance information includes operation step frequency light prompts and voice prompts associated with the operation step frequency light prompts. When the target working mode is the intelligent grounding prompt mode, grounding status prompt information is output based on the intelligent grounding prompt mode, and a grounding event log is recorded at the same time. The grounding status prompt information includes alternating flashing light prompts and voice prompts for warning of grounding status.

[0033] In this implementation, when the target operating mode is the five-prevention operation guidance mode, the core control unit immediately parses the operation type of the instruction and generates matching five-prevention operation guidance information. This information includes two parts: first, an operation step frequency light prompt, which drives multi-color LEDs to indicate the operation nature with specific colors and flashing frequencies (e.g., slow blue flashing indicates a tripping operation, fast yellow flashing indicates removing the ground wire); second, voice prompts associated with the operation step frequency light prompt, which are simultaneously broadcast through a speaker with clear and concise operation guidance (e.g., please perform a closing operation or please connect the ground wire), achieving dual visual and auditory guidance. Simultaneously, an operation timer is automatically started, setting a preset time limit for the current operation step. If the operation is not completed within the time limit or no feedback on completion is received, an overtime alarm or an anomaly report can be triggered, thereby urging maintenance personnel to standardize the operation. The system promptly executes the five-prevention procedures to effectively prevent misoperation or omissions. When the target operating mode is the intelligent grounding warning mode, the core control unit immediately enters the grounding safety warning state and outputs grounding status warning information. The warning information also adopts a multi-modal approach: on the one hand, it controls the LED module to perform alternating flashing light prompts (e.g., red and yellow LEDs flashing rapidly alternately) to form a highly recognizable visual warning; on the other hand, it plays voice prompts to warn of the grounding status (e.g., warning, there is a grounding wire here, do not operate), clearly informing on-site personnel that there are grounding protection measures in place. In addition, the system synchronously records the grounding event log, including the grounding device ID, grounding status, timestamp, and sign location information, and uploads the log to the five-prevention system and remote monitoring system through the wireless communication module to achieve traceability and closed-loop management of grounding operations.

[0034] The two high-priority modes provided in this application transform the instructions and status of the substation's core automation system into intuitive and executable on-site prompts, supplemented by time monitoring and event recording functions. This significantly enhances the signage's proactive guidance capabilities and safety management value in critical operational scenarios, truly achieving deep linkage and collaborative protection with the five-prevention system and intelligent grounding device.

[0035] Specifically, in the above embodiments, power management detection includes: acquiring the current voltage of the target sign and comparing the current voltage with a preset voltage threshold; when the current voltage is lower than the voltage threshold, activating a low-power operation state, wherein the low-power operation state includes reducing the lighting brightness and limiting the voice broadcast function; when the current voltage is higher than or equal to the voltage threshold, determining that the current voltage meets the normal operating conditions, collecting the ambient light intensity, and automatically adjusting the lighting brightness based on the ambient light intensity.

[0036] In this embodiment, when the current voltage is detected to be lower than the voltage threshold, the device is determined to be in a low-power state and automatically switches to low-power operation. In this state, to extend battery life and maintain basic safety prompt functions, energy-saving measures are actively taken. On the one hand, the brightness of the LED lighting module is significantly reduced by lowering the PWM duty cycle (e.g., reducing the backlight brightness to 30% of the normal value or keeping only the status indicator light on). On the other hand, the voice broadcast function is limited or completely turned off to avoid the high-power audio amplifier circuit from working, thereby prioritizing the core visual prompt capabilities under power-limited conditions. Conversely, when the current voltage is higher than or equal to the voltage threshold, the system confirms that the power state meets the normal operating conditions and then activates the complete environmental perception and adaptive adjustment function. At this time, the core control unit collects the ambient light intensity around the sign through the ambient light sensor and dynamically calculates the target lighting brightness based on the preset light intensity mapping algorithm. Subsequently, by adjusting the PWM signal duty cycle of the LED driver circuit, the lighting brightness is automatically adjusted. In strong light environments, the backlight is reduced or turned off to avoid glare, and in weak light or nighttime environments, the brightness is increased to ensure that the sign information is clearly visible.

[0037] Specifically, in the above embodiments, after switching to a degraded operating mode when a communication anomaly is detected, the method further includes: enabling a watchdog mechanism to monitor the operating status; and resetting based on the watchdog mechanism when an abnormal operating status is detected.

[0038] In this embodiment, to address the risk of communication interruption caused by complex electromagnetic environment or network fluctuations at the substation site, the device has a fault-tolerant and self-recovery mechanism. When the core control unit fails to receive a valid heartbeat packet from the remote monitoring system or the five-prevention system for a continuous period of time and the communication timeout exceeds a preset threshold, a communication anomaly is determined to have occurred, and the device automatically switches to a degraded operation mode. In this mode, the device no longer relies on external commands, but instead maintains basic safety prompt functions based on local sensors and status switches. For example, it continues to display the operating, maintenance, or fault status according to the position of the equipment status switching switch, and responds to local events such as personnel approaching or grounding signals, ensuring that critical safety information is not lost due to communication interruption.

[0039] Furthermore, upon entering degraded operation mode, the system immediately activates the Independent Watchdog Timer (IWDG) mechanism to monitor the main control program's operating status in real time. Specifically, during the initialization phase, the core control unit configures the watchdog timer's reload value and frequency division coefficient, sets a reasonable timeout period, and periodically performs a watchdog feed operation to clear the counter during normal program loops. If the core control unit fails to feed the watchdog in time due to program crashes, infinite loops, or hardware interference, the watchdog counter will overflow and trigger a hardware reset signal, forcibly restarting the system. After the reset, the device re-executes the initialization process and attempts to establish a communication connection again. If communication is still not restored, the degraded operation mode continues, and watchdog monitoring is reactivated. The watchdog mechanism ensures that even under extreme conditions of communication link failure, the device still has autonomous fault detection and recovery capabilities, effectively preventing the complete paralysis of the prompting function due to software anomalies, and improving the long-term operational reliability and safety of the intelligent signage in unattended substation environments.

[0040] Another aspect of the present invention provides a control device for intelligent substation equipment identification signs, used to implement the aforementioned intelligent substation equipment identification sign control method, comprising: a physical identification sign; an execution and output module, used to output lighting modes and voice prompts according to control commands; a sensing and input module, used to acquire local manual setting status, personnel proximity signals, and ambient light intensity; a wireless communication module, used to receive operation commands from the five-prevention system and status signals from the intelligent grounding device, and to interact with a remote monitoring system; a power supply module, used to supply power to each functional module and to realize power management monitoring and low-power management; and a core control unit, disposed in the sensing and input module, electrically connected to the execution and output module, the wireless communication module, and the power supply module, used to perform hardware and communication initialization, perform power management detection, and comprehensively judge multi-source input information based on a preset priority strategy to determine the target operating mode, and output corresponding prompts; wherein, the core control unit is also configured to dynamically adjust the prompts in response to changes in the surrounding environment, periodically upload operating status information to the remote monitoring system, and switch to a degraded operating mode when a communication anomaly is detected.

[0041] The intelligent substation equipment identification plate control device provided by this invention, such as... Figure 3As shown, the physical signage is made of weather-resistant metal or engineering plastic, with pre-drilled mounting holes and light-transmitting windows for integrating LED lighting modules and status indicator lights. The execution and output module includes high-brightness white LED beads and RGB LED indicator lights, as well as an audio-visual alarm module consisting of a 5W speaker and a CLASS D audio amplifier circuit, supporting pre-recorded voice prompts and operation guidance sounds to achieve dual visual and auditory warnings. The sensing and input module includes a three-position mechanical equipment status switching switch, corresponding to operating, maintenance, and fault states respectively. Status indicator LEDs are located next to the switch for visual confirmation, a dual-technology infrared personnel detection sensor, and an ambient light sensor. The wireless communication module can adopt a multi-mode design, including a ZigBee communication unit and a WiFi communication unit. It can also be expanded with an NB-IoT module to support data transmission from a remote monitoring platform. The power module is a solar power system, consisting of a 20W monocrystalline silicon solar panel, a 20Ah lithium iron phosphate battery, and an MPPT smart charger. The system consists of an electrical controller, capable of long-term operation in outdoor environments without mains power, and equipped with overcharge and over-discharge protection functions. The core control unit uses an STM32F407 microcontroller with a main frequency of up to 168MHz. It has rich built-in peripheral resources, including multiple UART, SPI, I²C, ADC, and PWM output interfaces. The main control chip is located inside the sensing and input module. It reads status switch signals through the GPIO interface, responds to personnel detection sensor triggers through the interrupt pin, collects analog signals from the ambient light sensor through the ADC channel, communicates with the ZigBee / WiFi module through the serial port, and drives LED lighting and RGB indicator lights through PWM signals, while controlling the start and stop of the audio power amplifier.

[0042] In its operation, the core control unit first performs hardware and communication initialization and monitors the output voltage of the power module. When the voltage meets the normal operating conditions, it comprehensively judges the operation commands from the five-proof system, the status signals of the intelligent grounding device, and the local manual setting status based on a preset priority strategy to determine the current target operating mode (such as the five-proof operation guidance mode, the intelligent grounding prompt mode, or the manual execution mode), and drives the execution to output the corresponding light mode and voice content. At the same time, it dynamically adjusts the brightness of the white LED according to the ambient light sensor data and increases the prompt intensity when a person is detected approaching. In addition, the device periodically uploads the operating status to the remote monitoring system through the wireless communication module. Once a communication abnormality is detected, it automatically switches to a degraded operating mode, relying only on local input to maintain basic prompt functions, and activates a watchdog mechanism to monitor program operation to ensure long-term reliable operation of the system.

[0043] Specifically, in the above embodiments, such as Figure 3As shown, the wireless communication module includes: a ZigBee communication unit for wireless communication with the smart grounding device; a WiFi communication unit for establishing a connection with the five-proof system and receiving operation commands; an NB-IoT communication unit for periodically uploading operating status information to the remote monitoring system; the core control unit communicates with the ZigBee and WiFi communication units via a serial port and controls the NB-IoT communication unit via the AT command set; when any communication channel is detected to be abnormal, the core control unit automatically switches to a degraded operation mode.

[0044] In this embodiment, the ZigBee communication unit operates in the 2.4 GHz ISM band, adopts the IEEE 802.15.4 protocol, and features low power consumption, self-organizing networking, and strong anti-interference capabilities. It is mainly used for short-range point-to-point or star network communication with smart grounding devices deployed in the field, receiving their grounding status signals in real time, and providing a reliable data source for grounding safety alerts. The WiFi communication unit supports IEEE 802.11. The NB-IoT communication unit uses the b / g / n standard to access the substation's internal LAN, establishing a TCP / IP connection with the five-prevention system host to receive operational instructions. The WiFi communication unit boasts high transmission speeds and supports a bidirectional heartbeat mechanism for real-time monitoring of the link status with the five-prevention system. The NB-IoT communication unit, based on the operator's cellular network, features wide coverage, low power consumption, and strong penetration capabilities. It is dedicated to periodically uploading device operating status information to a remote monitoring platform, enabling remote visual management and big data analysis of device status. In terms of hardware connectivity, the core control unit communicates with the ZigBee and WiFi communication units via two independent Universal Asynchronous Receiver / Transmitter (UART) serial ports for full-duplex communication, achieving high-speed and stable data exchange. For the NB-IoT communication unit, a third serial port sends standard AT command sets (such as AT+CSQ to query signal strength and AT+CIPSEND to send data) for configuration and control, ensuring compatibility with mainstream modules and reducing hardware-software coupling.

[0045] Furthermore, continuous health monitoring is performed on any of the above communication channels. If a valid data packet is not received multiple times, the heartbeat times out, or a communication error code is returned, the core control unit will determine that a communication abnormality has occurred and immediately activate the fault tolerance mechanism, automatically switching to a degraded operation mode. In this mode, the device no longer relies on external system commands, but instead relies solely on local sensing and input modules to maintain basic safety prompt functions, ensuring that critical status information can still be effectively conveyed to on-site maintenance personnel even in the event of a network interruption.

[0046] Specifically, in the above embodiments, such as Figure 3As shown, the sensing and input module includes: a device status switching switch for manually setting the device to be in operation, maintenance, or fault state; a personnel detection sensor for detecting whether personnel are approaching the sign; an ambient light sensor for collecting the current light intensity; the core control unit reads the status of the device status switching switch through the GPIO interface, responds to the trigger signal of the personnel detection sensor through interrupt, and collects the analog signal of the ambient light sensor through the ADC interface to realize real-time perception of local status and environmental information.

[0047] In this embodiment, the equipment status switching switch is a three-position mechanical toggle switch, corresponding to three preset operating states: operation, maintenance, and fault. It is typically installed on the front or side of the sign for easy access. Each position of the switch is clearly marked, and optional status indicator LEDs can be added to provide visual feedback. The switch's output signal is directly connected to the general purpose input / output pins of the core control unit. After system initialization, the core control unit configures the corresponding GPIO as input mode and periodically or event-drivenly reads its level status, thereby accurately obtaining the current operating status of the equipment manually set by maintenance personnel, serving as the third-level input source in priority judgment. The personnel detection sensor uses dual-technology infrared detection and is installed on the edge area of ​​the front of the sign to detect personnel within a range of 1 to 3 meters in front of the sign. To detect the presence of people approaching, compared to a single sensor, the dual-technology mechanism effectively suppresses false triggers caused by temperature changes, small animal movement, or electromagnetic interference, significantly improving detection accuracy. The sensor's output is connected to an external interrupt pin of the core control unit. When valid human movement is detected, the sensor outputs a rising edge or high-level pulse, triggering a hardware interrupt. The core control unit immediately responds to the interrupt service routine, records the person approaching event, and initiates a corresponding dynamic prompt strategy to achieve intelligent interaction that responds immediately to people. The ambient light sensor is a high-sensitivity analog output illuminance sensor installed on an unobstructed area of ​​the signboard surface to collect the ambient light intensity in real time. The analog voltage output signal is filtered and then input to the analog-to-digital converter (ADC) channel of the core control unit. The core control unit periodically initiates ADC sampling, converting the analog voltage value into a digital value, and calculates a suitable target value for LED lighting brightness based on a preset light-brightness mapping algorithm. Then, it dynamically adjusts the brightness of the white LED backlight through a PWM signal to ensure that it is not glaring in strong light and is clearly visible in low light, balancing visibility and energy saving.

[0048] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A control method for intelligent substation equipment identification signs, applied to intelligent substation equipment identification signs, characterized in that, The method includes: Perform hardware initialization and communication initialization, and perform power management checks; When the current voltage is detected to meet the normal operating conditions, based on the preset priority strategy, the acquired five-prevention system operation instructions, intelligent grounding device status signals and locally manually set status information are comprehensively judged to determine the target working mode to be executed, and the prompt information corresponding to the target working mode is output. The prompt information is dynamically adjusted in response to changes in the surrounding environment, wherein the prompt information includes lighting mode and voice content; The system acquires operational status information and periodically uploads it to a remote monitoring system. When a communication anomaly is detected, it switches to a degraded operation mode.

2. The method according to claim 1, characterized in that, The system, based on a preset priority strategy, comprehensively judges the acquired five-prevention system operation commands, intelligent grounding device status signals, and locally manually set status information to determine the target operating mode to be executed, and outputs the corresponding prompt information for the target operating mode, including: When an operation step instruction is received from the five-proof system, the target working mode is set to the five-proof operation guidance mode, and the five-proof operation guidance information is output based on the five-proof operation guidance mode. When no operation instructions are received from the five-prevention system, but a wireless grounding status signal is received from the intelligent grounding device, the target working mode is set to the intelligent grounding prompt mode, and grounding status prompt information is output based on the intelligent grounding prompt mode. When no operation instructions are received from the five-prevention system and no wireless grounding status signal is received from the intelligent grounding device, the system obtains the locally manually set status information, sets the target working mode to manual execution mode based on the status information, and outputs manual execution status information based on the manual execution mode.

3. The method according to claim 2, characterized in that, When the locally manually set status information is running, the target working mode is set to the running status mode, and running status prompt information is output based on the running status mode. When the locally manually set status information is maintenance status, the target working mode is set to maintenance status mode, and maintenance status prompt information is output based on the maintenance status mode. When the locally manually set status information is a fault status, the target working mode is set to the fault status mode, and the running status prompt information is output based on the fault status mode.

4. The method according to claim 3, characterized in that, The dynamic adjustment of the prompt information in response to the surrounding environment of the target sign includes: When the target working mode is the running state mode, the output includes the running state prompt information, which includes a first visual prompt to characterize the live operation. When personnel are detected approaching, a voice prompt and a corresponding dynamic visual prompt to warn of the risk of live operation are triggered simultaneously. When the target operating mode is maintenance mode, the operating status prompt information including the second visual prompt for representing the maintenance status is output, and when a valid grounding signal is detected, it switches to the third visual prompt for representing the grounded status, and plays a grounding status voice prompt; when no valid grounding signal is detected, the second visual prompt is maintained and no response is given to personnel approaching. When the target operating mode is fault state mode, the output includes the operating status prompt information including a fourth visual prompt to characterize the abnormal state, and any voice prompts are prohibited from being triggered.

5. The method according to claim 2, characterized in that, When the target working mode is the five-proof operation guidance mode, the five-proof operation guidance information is output based on the five-proof operation guidance mode, and the operation timer is started at the same time. The five-proof operation guidance information includes operation step frequency light prompts and voice prompts associated with the operation step frequency light prompts. When the target working mode is the intelligent grounding prompt mode, grounding status prompt information is output based on the intelligent grounding prompt mode, and grounding event log is recorded at the same time. The grounding status prompt information includes alternating flashing light prompts and voice prompts for warning of grounding status.

6. The method according to claim 1, characterized in that, The power management detection includes: Obtain the current voltage of the target sign and compare the current voltage with a preset voltage threshold; When the current voltage is lower than the voltage threshold, a low-power operation state is activated, wherein the low-power operation state includes reducing the lighting brightness and limiting the voice broadcast function; When the current voltage is higher than or equal to the voltage threshold, it is determined that the current voltage meets the normal operating conditions, the ambient light intensity is collected, and the lighting brightness is automatically adjusted based on the ambient light intensity.

7. The method according to claim 1, characterized in that, After switching to a degraded operation mode upon detecting a communication anomaly, the method further includes: Enable watchdog timer to monitor operational status; When an abnormal operating status is detected, a reset is performed based on the watchdog mechanism.

8. A smart substation equipment identification sign control device, characterized in that, The method for controlling intelligent substation equipment identification signs as described in any one of claims 1 to 7 includes: a wireless communication module, a power supply module, a sensing and input module, an execution and output module, and a core control unit; Physical signage; The execution and output module is used to output lighting modes and voice prompts according to control commands. The sensing and input module is used to acquire local manual setting status, personnel proximity signals, and ambient light intensity; The wireless communication module is used to receive operation commands from the five-prevention system and status signals from the intelligent grounding device, and to interact with the remote monitoring system. The power module is used to supply power to various functional modules and to realize power management monitoring and low power management. The core control unit is located in the sensing and input module and is electrically connected to the execution and output module, the wireless communication module and the power module, respectively. It is used to perform hardware and communication initialization, power management detection, and comprehensively judge multi-source input information based on a preset priority strategy to determine the target working mode and output corresponding prompt information. The core control unit is also configured to dynamically adjust the prompt information in response to changes in the surrounding environment, periodically upload operating status information to the remote monitoring system, and switch to a degraded operating mode when a communication anomaly is detected.

9. The intelligent substation equipment identification plate control device according to claim 8, characterized in that, The wireless communication module includes: ZigBee communication unit for wireless communication with smart grounding devices; The WiFi communication unit is used to establish a connection with the five-proof system and receive operation commands. The NB-IoT communication unit is used to periodically upload operational status information to the remote monitoring system; The core control unit communicates with the ZigBee communication unit and the WiFi communication unit via a serial port, and controls the NB-IoT communication unit via the AT command set. When any communication channel is detected to be abnormal, the core control unit automatically switches to a degraded operation mode.

10. The intelligent substation equipment identification plate control device according to claim 8, characterized in that, The sensing and input module includes: Equipment status switching switch is used to manually set the device to be in operation, maintenance or fault status; Personnel detection sensors are used to detect whether people are approaching the signage. An ambient light sensor is used to collect the current light intensity. The core control unit reads the state of the device state transition switch through the GPIO interface, responds to the trigger signal of the personnel detection sensor through interrupt, and collects the analog signal of the ambient light sensor through the ADC interface to realize real-time perception of local status and environmental information.

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