Evacuation indication control method and system based on fire emergency lighting

Abstract

The invention discloses an evacuation indication control method and system based on fire-fighting emergency lighting, and relates to the technical field of fire-fighting emergency lighting, and the method comprises the following steps: real-time environment monitoring: employing a plurality of high-precision sensors to collect environment data, including smoke concentration, temperature and video images, in a building. Key information of the fire position, the smoke concentration and the channel condition can be accurately mastered, dynamic evacuation path planning is carried out on the basis, multiple factors of the channel traffic capacity, the smoke concentration and the distance from an emergency exit are comprehensively considered, it is ensured that the safest and fastest evacuation path is planned for personnel, and the evacuation efficiency is improved. In addition, the emergency lighting brightness self-adaptive adjusting function ensures that people can clearly see the evacuation path and the surrounding environment in different environments, and the evacuation speed and accuracy are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire emergency lighting, and in particular to an evacuation indication control method and system based on fire emergency lighting. Background Art

[0002] As the size and complexity of buildings continue to increase, people pay more and more attention to life safety. Fire emergency lighting and evacuation indication systems, as an important part of building safety, play a vital role in emergency situations such as fire. When an emergency occurs, people need to find safe evacuation routes quickly and accurately to avoid loss of life and property. Therefore, an efficient and reliable fire emergency lighting evacuation indication system is of great significance to protecting people's life safety.

[0003] At present, traditional fire emergency lighting and evacuation indication systems usually use fixed evacuation signs in evacuation route planning, which cannot be dynamically adjusted according to the actual fire situation. When a fire occurs, the spread of smoke may quickly change the passability of the passage, but the traditional system cannot perceive and adjust the evacuation route in time, resulting in people being directed to dangerous areas. On the other hand, the existing system often only considers a single factor when planning the route, such as the distance from the safe exit, while ignoring the important factors of the passage capacity and smoke concentration. This results in the planned evacuation route being suboptimal, increasing the time and risk of personnel evacuation.

[0004] In summary, the existing fire emergency lighting and evacuation indication systems have many shortcomings in dynamic evacuation path planning and cannot meet the high requirements of modern buildings for safe evacuation. Therefore, there is an urgent need for a fire emergency lighting evacuation indication control method and system for dynamic evacuation path planning based on real-time environmental monitoring data to improve the efficiency and safety of personnel evacuation. Summary of the invention

[0005] The purpose of the present invention is to make up for the shortcomings of the prior art and provide an evacuation indication control method and system based on fire emergency lighting, which can significantly improve the evacuation efficiency in emergency situations by real-time monitoring of the environmental status in the building and dynamically adjusting the evacuation path. The system uses high-precision sensors to collect key data on smoke concentration, temperature and light in real time, quickly analyze the fire situation, and update the evacuation indication in real time to ensure that personnel can evacuate to a safe area quickly and accurately.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: On the one hand, a method for controlling evacuation indication based on fire emergency lighting comprises the following steps:

[0007] S100, real-time environmental monitoring, uses a variety of sensors to collect environmental data in the building, the environmental data includes smoke concentration, temperature and video images, the sensors include smoke sensors, temperature sensors, light sensors and video surveillance cameras;

[0008] S200, the collected data is transmitted to the central control center in real time, and the central control center analyzes and processes the environmental data, determines the fire situation and formulates an evacuation strategy, that is, receives data from the sensor module, including smoke concentration data S, temperature data T, light intensity data L and video image data V, and determines the location of the fire and the on-site situation;

[0009] S300, based on real-time environmental monitoring data, performs dynamic evacuation route planning and updates the signs on emergency lighting fixtures;

[0010] S400, intelligently adjusts the brightness of emergency lighting fixtures according to ambient light intensity and smoke concentration;

[0011] S500 uses voice prompts and flashing lights to provide evacuation instructions and guidance.

[0012] Furthermore, the S200 analyzes the smoke density data S, and if the smoke density S exceeds a preset smoke density threshold S th , it is determined that a fire has occurred, that is: S>S th , then a fire sign F occurs smoke =1, otherwise F smoke =0.

[0013] Furthermore, the S200 analyzes the temperature data T, and the temperature data T rises rapidly in a short period of time and exceeds a preset temperature change threshold value T. ch , combined with the smoke concentration judgment result F smoke , further confirm the possibility of fire, that is: T(t)-T(t-Δt)>T ch And F smoke =1, then the fire occurs flag F fire =1, otherwise F fire =0, where t is the current time and Δt is the time interval.

[0014] Furthermore, the S200 uses the video image data V to perform image analysis to identify smoke and flame features. If smoke and flame features are detected, the judgment of fire occurrence is enhanced, that is, if smoke and flame features are detected in the video image, the fire occurrence flag F image =1, otherwise F image =0, the comprehensive fire judgment flag is F total =F fire ×F imageo , where Ffire A sign indicating a fire has occurred.

[0015] Furthermore, the S200 central control center determines the fire status according to the fire identification mark F total and light intensity data L, combined with the nodes and edges of the grid architecture and weights w ij , formulate an evacuation strategy, namely F total =1, the evacuation route planning is started, the indication signs on the emergency lighting fixtures are updated, and the brightness of the emergency lighting fixtures is adjusted.

[0016] Furthermore, the S300 constructs a grid architecture according to the building data layout of real-time environmental monitoring, where N represents the nodes of rooms and passages, and the edges E represent the passages connecting these nodes, where the nodes N i Represents the intersection of the room and the passage, edge E ij Represents connecting two nodes N i and N j channels, for each node N i and edge E ij Assign weight w ij The weight is determined by the passage capacity, smoke density and distance to the safe exit. The formula is: ij =k1·c ij +k2·s ij +k3·d ij , where c ij Indicates channel E ij The traffic capacity, s ij Indicates channel E ij The smoke concentration, d ij Indicates channel E ij The distance to the nearest safe exit, k1, k2, k3 are weight coefficients, and at the same time, calculate the distance from any node N i To the secure exit node N exit The shortest path P i,exit ,Right now Among them, P i,exit Represents slave node N i Go to emergency exit N exit The path, Indicates the path corresponding to the minimum value, and introduces the heuristic function h(N i ), search for the optimal path efficiency based on the A algorithm, and update the shortest path Right now ∑ Eij w ij +h(N j )),in, represents the shortest path, h(N j ) is a heuristic function, representing the node N jEstimated distance to the emergency exit;

[0017] For channel E detected ij When the smoke density is too high and the channel is blocked by fire obstacles, the weight of the channel w ij Set it to the maximum value, exclude the channel from participating in path planning, recalculate the shortest evacuation path based on real-time environmental monitoring data, and update the indicator signs on the emergency lighting fixtures. The indicator sign update formula is: Among them, U ij Indicates the update status of the indicator, θ is the weight threshold, for w ij When it is less than the threshold θ, the indication flag is updated.

[0018] On the other hand, an evacuation indication control system based on fire emergency lighting is composed of a sensor module, a central control module, a path planning module, an emergency lighting module and a control instruction generation module:

[0019] The sensor module includes a smoke sensor, a temperature sensor, a light sensor and a video surveillance camera, which is responsible for collecting environmental data inside the building and transmitting it to the central control module;

[0020] The central control module quickly analyzes and processes environmental data to accurately determine the location of the fire, its spreading trend, and the distribution of smoke;

[0021] The path planning module calculates and plans the optimal evacuation path, excludes passages that are not suitable for evacuation, recalculates the shortest path, and updates the indicator signs on the emergency lighting fixtures;

[0022] The emergency lighting fixture module adjusts the brightness of the emergency lighting fixture according to the ambient light intensity and smoke concentration;

[0023] The control instruction generation module is composed of emergency lighting fixtures distributed in the building, and receives control instructions from the central control module to realize the functions of brightness adjustment, indicator sign display, voice prompt, and light flashing.

[0024] Furthermore, the system uses a combination of wired and wireless communication with the fire alarm system and the automatic sprinkler system in the building. When the fire alarm system detects a fire signal and triggers an alarm, it immediately sends fire information to the evacuation indication control system, including the floor where the fire occurred, the location of the area, and the key parameters of the fire size. After receiving this information, the system quickly starts the evacuation indication control strategy.

[0025] Compared with the prior art, the evacuation indication control method and system based on fire emergency lighting have the following beneficial effects:

[0026] 1. Through real-time environmental monitoring, the present invention can accurately grasp the key information of the fire location, smoke concentration and channel conditions. The dynamic evacuation route planning based on this comprehensively considers multiple factors such as channel capacity, smoke concentration and distance to the safe exit, ensuring that the safest and fastest evacuation route is planned for personnel, greatly shortening the evacuation time. In addition, the adaptive adjustment function of the emergency lighting brightness ensures that personnel can clearly see the evacuation route and the surrounding environment in different environments, further improving the speed and accuracy of evacuation.

[0027] Second, the present invention adopts dynamic evacuation path planning and timely adjusts the evacuation route according to real-time environmental changes to prevent people from mistakenly entering dangerous areas. When it is detected that a channel is not suitable for evacuation, its weight is immediately set to a maximum value and excluded from the path planning to ensure that people stay away from channels with high smoke concentrations and obstacles. On the other hand, the adaptive adjustment function of emergency lighting brightness provides people with good lighting conditions, allowing them to clearly observe the surrounding environment and reduce the occurrence of accidents caused by unclear vision.

[0028] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is an operation flow chart of an evacuation indication control method based on fire emergency lighting;

[0031] Figure 2 It is a structural connection diagram of an evacuation indication control system based on fire emergency lighting. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1

[0034] This embodiment describes in detail the application of an evacuation indication control method based on fire emergency lighting in a commercial complex. By real-time monitoring of environmental data, dynamic evacuation route planning and guidance, and linkage with the fire protection system, the efficiency and safety of personnel evacuation in commercial complexes in emergency situations such as fire are improved.

[0035] In the specific implementation, first of all, in large commercial complexes, smoke sensors, temperature sensors, light sensors and video surveillance cameras are installed in key locations of corridors, stairwells and elevator halls on each floor. Smoke sensors and temperature sensors can monitor in real time the smoke concentration and temperature changes generated when a fire occurs. Light sensors are used to sense changes in ambient light intensity. Video surveillance cameras monitor the on-site situation in all directions. These sensors are responsible for collecting environmental data and transmitting the data to the central control center through wireless communication technology. The central control center is located in the security monitoring room of the building.

[0036] Then, the central control center quickly analyzes and processes the data from various sensors. When the smoke concentration exceeds the preset smoke concentration threshold S th When S>S th , it is determined that a fire may occur, and the fire sign F smake =1, otherwise F smoke =0, at the same time, analyze the temperature data T, if T(t)-T(t-Δt)>T ch And and F smoke =1, it further confirms that a fire has occurred, and the fire occurrence flag F fire =1, otherwise F fire = 0, where t is the current time and Δt is the time interval. The video surveillance camera uses image analysis technology to identify smoke and flame features. If smoke or flame features are detected, the fire flag F image =1, otherwise F image =0, the comprehensive fire judgment flag is F total =F fire ×F imageo Once F total =1, the central control center immediately starts evacuation route planning.

[0037] When planning the evacuation route, a grid architecture is constructed based on the building data layout of real-time environmental monitoring, where N represents the nodes of rooms and passages, and the edge E represents the passages connecting these nodes. i Represents the intersection of the room and the passage, edge E ij Represents connecting two nodes N i and N j channels, for each node N i and edge Eij Assign weight w ij The weight is determined by the passage capacity, smoke density and distance to the safe exit. The formula is: ij =k1·c ij +k2·s ij +k3·d ij , where c ij Indicates channel E ij The traffic capacity, s ij Indicates channel E ij The smoke concentration, d ij Indicates channel E ij The distance to the nearest safe exit, k1, k2, k3 are weight coefficients, and at the same time, calculate the distance from any node N i To the secure exit node N exit The shortest path P i,exit ,Right now Among them, P i,exit Represents slave node N i Go to emergency exit N exit The path, Indicates the path corresponding to the minimum value, and introduces the heuristic function h(N i ), search for the optimal path efficiency based on the A algorithm, and update the shortest path Right now ∑ Eij w ij +h(N j )),in, represents the shortest path, h(N j ) is a heuristic function, representing the node N j Estimated distance to the safe exit, for detected channel E ij When the smoke density is too high and the channel is blocked by fire obstacles, the weight of the channel w ij Set it to the maximum value, exclude the channel from participating in path planning, recalculate the shortest evacuation path based on real-time environmental monitoring data, and update the indicator signs on the emergency lighting fixtures. The indicator sign update formula is: Among them, U ij Indicates the update status of the indicator, θ is the weight threshold, for w ijWhen it is less than the threshold value θ, the indicator sign is updated, and the brightness of the emergency lighting fixtures is adaptively adjusted according to the ambient light intensity and smoke concentration. In areas with high smoke concentration or dim light, the brightness of the emergency lighting fixtures is automatically increased to ensure that personnel can clearly see the evacuation path and the surrounding environment. For example, a fire occurs in a certain area of ​​the shopping mall and smoke is everywhere. The light sensor detects a decrease in light intensity, and the smoke sensor detects an increase in smoke concentration. The system automatically increases the brightness of the emergency lighting fixtures near the area to more than 80% of the maximum value to provide sufficient lighting for personnel evacuation.

[0038] At the same time, the system adopts multi-mode indication and guidance methods. Emergency lighting fixtures guide people to evacuate through voice prompts and flashing lights. For example, when a fire occurs, the emergency lighting fixtures will issue a voice prompt: "Please stay calm, evacuate in the direction of the light, and go to the nearest safe exit." The light flashing mode uses a unique coding method to convey different information through different flashing frequencies and colors. For example, a green light that flashes quickly and continuously indicates the direction of the safe exit, and a red light indicates a dangerous area, reminding people to avoid it.

[0039] In addition, the system uses a combination of wired and wireless communication methods with the fire alarm system and automatic sprinkler fire extinguishing system in the commercial complex to achieve close linkage. When the fire alarm system detects a fire signal and triggers an alarm, it immediately sends fire information to this evacuation indication control system, including key parameters such as the floor where the fire occurred, the location of the area, and the size of the fire. After receiving this information, the central control center quickly activates the corresponding evacuation indication control strategy. For example, if a fire occurs on a certain floor of a shopping mall and the automatic sprinkler fire extinguishing system is activated in this area, the system will adjust the evacuation route according to the water spraying situation and the size of the fire, avoid areas with accumulated water, and remind personnel through the signs on the emergency lighting fixtures that "the ground ahead is slippery, please pay attention to safety."

[0040] In summary, by applying the fire emergency lighting evacuation indication control method of this patent in commercial complexes, the efficiency and safety of personnel evacuation can be effectively improved. Real-time environmental monitoring and dynamic evacuation route planning ensure that personnel can quickly find a safe evacuation route and avoid being directed to dangerous areas. The adaptive adjustment of emergency lighting brightness and multi-mode indication and guidance provide personnel with clear evacuation instructions, enabling them to respond quickly and correctly in an emergency. The linkage with the fire protection system further enhances the overall fire emergency response capabilities and ensures the safe operation of the commercial complex.

[0041] Embodiment 2

[0042] This embodiment introduces in detail an application of an evacuation indication control system based on fire emergency lighting in a high-rise office building. Through the application of this system, the efficiency and safety of personnel evacuation in high-rise office buildings in emergency situations such as fires are improved.

[0043] First, the sensor modules in the system are distributed in every corner of the office building, including smoke sensors, temperature sensors, light sensors and video surveillance cameras. Smoke sensors and temperature sensors can monitor the smoke concentration and temperature changes when a fire occurs in real time. Once an abnormality is detected, the data is immediately transmitted to the central control module. The light sensor senses the changes in the ambient light intensity in real time, providing a basis for the adaptive adjustment of the brightness of emergency lighting fixtures. Video surveillance cameras monitor public areas such as corridors, elevators, and hallways in all directions, providing real-time image information for the central control module.

[0044] After receiving the data from the sensor module, the central control module conducts rapid analysis and processing. When the smoke concentration exceeds the preset threshold or the temperature rises rapidly in a short period of time, the system determines that a fire may have occurred, and further confirms it in combination with the video surveillance image. If a fire is confirmed, the central control module immediately starts evacuation route planning. In terms of evacuation route planning, the system builds a grid architecture based on the structural layout of the office building. The intersection of each room and channel is regarded as a node, and the channel connecting two nodes is regarded as an edge. A weight is assigned to each node and edge. The determination of the weight takes into account factors such as the channel's capacity, smoke concentration, and distance to the safe exit. For the channel's capacity, the system will evaluate the channel's width, the number of people it can accommodate, and whether there are obstacles. If the channel is wide, can accommodate a large number of people, and has no obstacles, the capacity will be given a higher weight; conversely, if the channel is narrow, can accommodate a limited number of people, or there are obstacles, the weight of the capacity will be reduced accordingly. In terms of smoke concentration, the system determines the weight based on the smoke concentration value detected by the smoke sensor. The higher the smoke concentration, the lower the weight of the channel will be, so as to avoid people choosing channels with high smoke concentrations for evacuation. The distance to the safe exit is also an important factor in the weight considerations. The closer the channel is to the safe exit, the higher the weight will be, so as to guide people to reach the safe exit faster.

[0045] By comprehensively considering these factors, the system can accurately calculate the shortest path from any node to the safe exit. The system traverses all possible paths, compares their sum of weights, and selects the path with the smallest sum of weights as the shortest path. At the same time, the system will introduce heuristic search, based on some empirical rules and estimates, to further improve the efficiency of path search and ensure that the optimal evacuation path can be found quickly. When it is detected that some channels are blocked by excessive smoke concentration or fire obstacles, the system will set the weight of the channel to the highest value to exclude it from path planning, so as to ensure that personnel will not be guided to dangerous channels during the evacuation process. Then, the system will recalculate the shortest evacuation path based on real-time environmental monitoring data and update the signs on the emergency lighting fixtures in a timely manner. The update decision of the sign is based on the weight threshold. If the weight of a channel is lower than the threshold, it means that the channel is relatively safe. The system will update the sign to guide personnel to choose the channel for evacuation; if the weight is higher than the threshold, it means that there is a greater risk in the channel, and the system will not update the sign to prevent personnel from entering the channel.

[0046] The emergency lighting module adaptively adjusts the brightness of the emergency lighting according to the ambient light intensity and smoke concentration. During the day when the smoke concentration is low, the lamps maintain a low brightness to save energy, and at night or when the smoke concentration is high, the brightness of the lamps automatically increases to ensure that personnel can clearly see the evacuation route and the surrounding environment. For example, when a fire occurs, if the smoke concentration on a certain floor is large, the light sensor detects a sharp drop in light intensity, and the system will automatically increase the brightness of the emergency lighting on that floor and adjacent floors to the maximum value to provide sufficient lighting for personnel evacuation. At the same time, the system adopts a multi-mode indication and guidance method. The emergency lighting not only guides personnel to evacuate through traditional arrow signs, but is also equipped with voice prompts and light flashing functions. When a fire occurs, the lamps will issue a voice prompt: "Please evacuate quickly to the stairs and do not take the elevator." The light flashing mode is used to attract people's attention when the smoke is large or the line of sight is obstructed. For example, a fast-flashing yellow light indicates the direction of emergency evacuation, and a flashing blue light indicates a safe area.

[0047] In addition, the system is closely linked with the fire alarm system and automatic sprinkler fire extinguishing system in the office building. When the fire alarm system detects a fire signal and triggers an alarm, it immediately sends fire information to the evacuation indication control system, including key parameters such as the floor where the fire occurred, the location of the area, and the size of the fire. After receiving this information, the system quickly initiates the corresponding evacuation indication control strategy. For example, if the fire occurs on an intermediate floor, the system will dynamically adjust the evacuation route according to the direction of fire spread and smoke diffusion. If the smoke concentration in the stairwell is low, the system will guide people to evacuate through the stairs; if the smoke concentration in the stairwell is high, the system will find other relatively safe evacuation channels and guide people in time through the signs on the emergency lighting fixtures. At the same time, the system will remind people to avoid areas with accumulated water according to the working condition of the automatic sprinkler fire extinguishing system to avoid accidents such as falls caused by slippery floors. The system also has remote monitoring and management functions. The property management department of the office building can monitor the operating status of the system in real time through the central control platform, view the data of each sensor and the working condition of the emergency lighting fixtures, and take timely measures to deal with it once an abnormality is found. For example, when a smoke sensor fails, the central control platform will issue an alarm to remind the management personnel to replace or repair the sensor in time to ensure the normal operation of the system. In order to ensure the reliability and stability of the system, the system is regularly maintained and tested, and a comprehensive system inspection is carried out every month, including sensor calibration, functional testing of emergency lighting fixtures, and stability testing of the communication system. A simulated fire drill is conducted every six months to test the evacuation indication effect of the system in actual emergency situations, and at the same time, let the people in the office building be familiar with the evacuation process and precautions.

[0048] In summary, by applying this fire emergency lighting evacuation indication and control system in high-rise office buildings, the efficiency and safety of personnel evacuation are effectively improved. The system's real-time environmental monitoring, dynamic evacuation path planning, adaptive adjustment of emergency lighting brightness, multi-mode indication and guidance, and linkage with the fire protection system provide all-round protection for the safe evacuation of personnel in emergency situations.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for controlling evacuation indication based on fire emergency lighting, characterized in that: The method comprises the following steps: S100, real-time environmental monitoring, uses a variety of sensors to collect environmental data in the building, the environmental data includes smoke concentration, temperature and video images, the sensors include smoke sensors, temperature sensors, light sensors and video surveillance cameras; S200, the collected data is transmitted to the central control center in real time, and the central control center analyzes and processes the environmental data, determines the fire situation and formulates an evacuation strategy, that is, receives data from the sensor module, including smoke concentration data S, temperature data T, light intensity data L and video image data V, and determines the location of the fire and the on-site situation; S300, based on real-time environmental monitoring data, performs dynamic evacuation route planning and updates the signs on emergency lighting fixtures; S400, intelligently adjusts the brightness of emergency lighting fixtures according to ambient light intensity and smoke concentration; S500 uses voice prompts and flashing lights to provide evacuation instructions and guidance.

2. The evacuation indication control method based on fire emergency lighting according to claim 1 is characterized in that: The S200 analyzes the smoke density data S. If the smoke density S exceeds a preset smoke density threshold S th , it is determined that a fire has occurred, that is: S>S th , then a fire sign F occurs smoke =1, otherwise F smoke =0.

3. The evacuation indication control method based on fire emergency lighting according to claim 2 is characterized in that: The step S200 analyzes the temperature data T. If the temperature data T rises rapidly in a short period of time and exceeds a preset temperature change threshold value T, ch , combined with the smoke concentration judgment result F smoke , further confirm the possibility of fire, that is: T(t)-T(t-Δt)>T ch And F smoke =1, then the fire occurs flag F fire =1, otherwise F fire =0, where t is the current time and Δt is the time interval.

4. The evacuation indication control method based on fire emergency lighting according to claim 3 is characterized in that: The S200 uses the video image data V to perform image analysis to identify smoke and flame features. If smoke and flame features are detected, the judgment of fire occurrence is enhanced, that is, if smoke and flame features are detected in the video image, the fire occurrence flag F image =1, otherwise F image =0, the comprehensive fire judgment flag is F total =F fire ×F imageo , where F fire A sign indicating a fire has occurred.

5. The evacuation indication control method based on fire emergency lighting according to claim 4 is characterized in that: The S200 central control center determines the fire flag F total and light intensity data L, combined with the nodes and edges of the grid architecture and weights w ij , formulate an evacuation strategy, namely F total =1, the evacuation route planning is started, the indication signs on the emergency lighting fixtures are updated, and the brightness of the emergency lighting fixtures is adjusted.

6. The evacuation indication control method based on fire emergency lighting according to claim 1 is characterized in that: The S300 constructs a grid architecture according to the building data layout of real-time environmental monitoring, where N represents the nodes of rooms and channels, and the edges E represent the channels connecting these nodes, where the nodes N i Represents the intersection of the room and the passage, edge E ij Represents connecting two nodes N i and N j channels, for each node N i and edge E ij Assign weight w ij The weight is determined by the passage capacity, smoke density and distance to the safe exit. The formula is: ij =k1·c ij +k2·s ij +k3·d ij , where c ij Indicates channel E ij The traffic capacity, s ij Indicates channel E ij The smoke concentration, d ij Indicates channel E ij The distance to the nearest safe exit, k1, k2, k3 are weight coefficients, and at the same time, calculate the distance from any node N i To the secure exit node N exit The shortest path P i,exit ,Right now Among them, P i,exit Represents slave node N i Go to emergency exit N exit The path, Indicates the path corresponding to the minimum value, and introduces the heuristic function h(N i ), search for the optimal path efficiency based on the A algorithm, and update the shortest path Right now in, represents the shortest path, h(N j ) is a heuristic function, representing the node N j Estimated distance to safe exit; For channel E detected ij When the smoke density is too high and the channel is blocked by fire obstacles, the weight of the channel w ij Set it to the maximum value, exclude the channel from participating in path planning, recalculate the shortest evacuation path based on real-time environmental monitoring data, and update the indicator signs on the emergency lighting fixtures. The indicator sign update formula is: Among them, U ij Indicates the update status of the indicator, θ is the weight threshold, for w ij When it is less than the threshold θ, the indication flag is updated.

7. An evacuation indication control system based on fire emergency lighting according to any one of claims 1 to 6, characterized in that: The system consists of a sensor module, a central control module, a path planning module, an emergency lighting module and a control instruction generation module: The sensor module includes a smoke sensor, a temperature sensor, a light sensor and a video surveillance camera, which is responsible for collecting environmental data inside the building and transmitting it to the central control module; The central control module quickly analyzes and processes environmental data to accurately determine the location of the fire, its spreading trend, and the distribution of smoke; The path planning module calculates and plans the optimal evacuation path, excludes passages that are not suitable for evacuation, recalculates the shortest path, and updates the indicator signs on the emergency lighting fixtures; The emergency lighting fixture module adjusts the brightness of the emergency lighting fixture according to the ambient light intensity and smoke concentration; The control instruction generation module is composed of emergency lighting fixtures distributed in the building, and receives control instructions from the central control module to realize the functions of brightness adjustment, indicator sign display, voice prompt, and light flashing.

8. The evacuation indication control system based on fire emergency lighting according to claim 7, characterized in that: The system uses a combination of wired and wireless communication with the fire alarm system and automatic sprinkler fire extinguishing system in the building. When the fire alarm system detects a fire signal and triggers an alarm, it immediately sends fire information to the evacuation indication control system, including key parameters such as the floor where the fire occurred, the location of the area, and the size of the fire. After receiving this information, the system quickly starts the evacuation indication control strategy.

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