A method and system for planning personnel evacuation routes during gas leakage

Abstract

The present application discloses a method and system for planning a route for personnel evacuation during a gas leak, and relates to the technical field of route planning. The method includes: sending a unique identity, coordinates, and gas types supported for detection to a path safety controller through a gas link control protocol; the path safety controller parses a registration request and generates a visual topology map; the path safety controller receives a weight configuration and sends it to a gas detection device; the gas detection device calculates a leakage risk value and reports it to the path safety controller, and the controller analyzes the leakage risk of all paths, generates an optimal evacuation route, and sends it; alarm triggering and path indication, the gas detection device triggers an alarm based on the optimal evacuation route and indicates the evacuation direction. The present invention significantly improves the efficiency and safety of personnel evacuation during a gas leak through automated registration, real-time topology map generation, dynamic weight configuration, and optimal path planning.

Description

Technical Field

[0001] The present application relates to the technical field of route planning, and in particular to a method and system for planning a route for evacuating personnel in the event of a gas leak. Background Art

[0002] In chemical plants, laboratories and other environments, the leakage of harmful gases is a serious safety hazard. Once a leak occurs, how to evacuate people quickly and safely becomes a key issue. Traditional gas detection and evacuation methods usually rely on manual judgment and fixed safety exit signs. This method is often not flexible and efficient in complex and changing environments, and is prone to cause casualties.

[0003] In recent years, with the development of wireless sensor network technology, some advanced gas leak detection systems have begun to adopt distributed sensor networks. These systems monitor the gas concentration in the environment in real time through multiple sensor nodes and transmit the data to the central control system. The central control system generates an alarm and guides personnel to evacuate based on the received data. Although this method has improved the accuracy and response speed of detection to a certain extent, there are still some shortcomings, such as the complex layout and management of sensor nodes, high system maintenance costs, and limited data processing capabilities in large-scale applications. In particular, in terms of sensor configuration, it is often necessary to configure each sensor separately to complete the adjustment of a parameter, which is time-consuming and labor-intensive. In addition, managers cannot see the layout of all sensors in the entire space and cannot check the registration status of sensors in time. Summary of the invention

[0004] The present application provides a method and system for planning a route for personnel evacuation during a gas leak, which significantly improves the efficiency and safety of personnel evacuation during a gas leak through automatic registration, real-time topology map generation, dynamic weight configuration and optimal path planning.

[0005] In a first aspect, the present application provides a method for planning a personnel evacuation route in case of a gas leak, comprising:

[0006] In the detection device registration step, the gas detection device encapsulates its unique identity, coordinates and supported gas types into a registration request packet, and sends the registration request packet to the path safety controller through the gas link control protocol to apply for registration;

[0007] In the step of generating a spatial topology map, the path safety controller receives and parses the registration request packet of the gas detection device, and generates a visualized spatial topology map of the gas detection device based on the acquired unique identity identifier, coordinates, and gas types supported for detection of the gas detection device;

[0008] In the step of sending weight configuration, the path safety controller receives the weight configuration of gas type, gas concentration and duration of gas concentration exceeding the safety threshold, and sends the weight configuration to all successfully registered gas detection devices through the gas link control protocol;

[0009] In the evacuation path planning step, the gas detection device calculates whether there is a leakage risk of the gas type based on the weight issued, and reports the gas type with leakage risk and its corresponding gas concentration and the duration of the gas concentration exceeding the safety threshold through the gas link control protocol. The path safety controller analyzes the data reported by all registered gas detection devices based on the spatial topology map, generates the optimal evacuation route, and sends it to all registered gas detection devices through the gas link control protocol;

[0010] In the alarm triggering and route indication step, the registered gas detection device triggers the alarm based on the optimal evacuation route and turns on the direction lights to indicate the evacuation direction.

[0011] Furthermore, the gas link control protocol includes a request type part, a device information part, a gas information part and an alarm indication part:

[0012] The request type part is used to identify the purpose of initiating the gas link control protocol request, including gas detection device registration, weight configuration issuance, leakage risk reporting, evacuation route instruction issuance and request confirmation;

[0013] The device information part is used to identify the device information that can verify the unique identity of the initiator of the gas link control protocol;

[0014] The gas information part is used to identify data information of different gas types that need to be reported; the data information of different gas types includes gas type, gas concentration, duration of gas concentration exceeding the safety threshold, weight of gas type, weight of duration of gas concentration exceeding the safety threshold, and gas leakage risk value;

[0015] The alarm indication part is used to indicate the direction of the evacuation route.

[0016] Furthermore, the detection device registration step specifically includes:

[0017] The gas detection device fills the gas detection device registration into the request type part, fills its own unique identity and coordinates into the device information part, fills the supported gas type into the gas information part, and generates a gas detection device registration request;

[0018] The gas detection device obtains the IP address and port of the path safety controller and sends a registration request of the gas detection device to the address of the path safety controller;

[0019] The path security controller resolves the received gas detection device registration request and confirms the legitimacy of the gas detection device through the device information part; if it is legal, the path security controller generates a request confirmation data packet and sends it to the gas detection device, indicating that the registration is successful; if it is illegal, the gas detection device registration request is directly discarded, indicating that the registration of the gas detection device is abnormal.

[0020] Furthermore, the step of generating the spatial topology map specifically includes:

[0021] Based on the acquired coordinates of the gas detection device, the path safety controller generates a spatial topology map that visualizes the location information of the registered gas detection device. The spatial topology map can be used to intuitively confirm the identity, coordinates, gas types supported for detection, and weight configuration information of the gas detection device, and supports modification of the weight configuration of the gas detection device through the spatial topology map.

[0022] Furthermore, the weight configuration issuing step specifically includes:

[0023] The path safety controller receives the weight configuration modification of the gas detection device, sends the weight configuration and fills it into the request type part, fills the unique identity of the path safety controller into the device information part, fills the modified weight configuration into the gas information part, and generates a weight configuration modification request;

[0024] The path safety controller obtains the IP address and port of the gas detection device and sends a weight configuration modification request to the gas detection device.

[0025] Furthermore, the evacuation path planning step specifically includes:

[0026] The gas detection device detects whether there is a leakage risk at present based on the weight of gas type, gas concentration and the duration that the gas concentration exceeds the safety threshold. The formula is as follows:

[0027] ;

[0028] in, represents the weight of the gas type, represents the weight of gas concentration, The weight representing the duration that the gas concentration exceeds the safety threshold, Indicates the currently detected gas concentration. Indicates the duration that the currently detected gas concentration exceeds the threshold. Used to reflect the impact of gas type on leakage risk. Indicates the leakage risk value;

[0029] When the leakage risk value exceeds the threshold, it is considered that there is a leakage risk;

[0030] The gas detection device fills the leakage risk report into the request type part, fills its own unique identity and coordinates into the device information part, fills the gas type, gas concentration, duration of gas concentration exceeding the safety threshold and leakage risk value into the gas information part, and generates a leakage risk reporting request;

[0031] The gas detection device obtains the IP address and port of the path safety controller and sends a leakage risk reporting request to the path safety controller;

[0032] The path safety controller receives and parses the leakage risk reporting request, analyzes the leakage risk values ​​of the gas detection devices on all evacuable paths, obtains the evacuation path with the least total leakage risk, fills in the alarm indication part, and sends an evacuation route indication request to the gas detection device.

[0033] In a second aspect, the present application provides a system for planning a personnel evacuation route in case of a gas leak, the system comprising:

[0034] The detection device registration module is used for the gas detection device to encapsulate its own unique identity, coordinates and supported gas types into a registration request packet, and send the registration request packet to the path safety controller to apply for registration through the gas link control protocol;

[0035] The spatial topology map generation module, the path safety controller receives and parses the registration request packet of the gas detection device, and generates a visualized spatial topology map of the gas detection device based on the acquired unique identity, coordinates and gas types supported for detection of the gas detection device;

[0036] A weight configuration sending module is used for the path safety controller to receive the weight configuration of the gas type, gas concentration and the duration of the gas concentration exceeding the safety threshold, and send the weight configuration to all successfully registered gas detection devices through the gas link control protocol;

[0037] The evacuation path planning module is used for the gas detection device to calculate whether there is a leakage risk of the gas type according to the weight issued, and report the gas type with leakage risk and its corresponding gas concentration and the duration of the gas concentration exceeding the safety threshold through the gas link control protocol. The path safety controller analyzes the data reported by all registered gas detection devices based on the spatial topology map, generates the optimal evacuation route, and sends it to all registered gas detection devices through the gas link control protocol;

[0038] The alarm triggering and path indication module is used for registered gas detection devices to trigger an alarm based on the optimal evacuation route, and turn on the direction lights to indicate the evacuation direction.

[0039] The present invention adopts the above technical solution and has the following beneficial effects:

[0040] (1) The present invention enables the gas detection device to achieve plug-and-play automatic registration and configuration through the gas link control protocol, greatly reducing the need for manual operation, improving the overall stability and reliability of the system, and reducing maintenance costs and complexity;

[0041] (2) The system of the present invention can automatically generate and update the spatial distribution topology map of the detection devices, which can not only intuitively display the location and working status of each device, but also quickly locate the source of the problem when an abnormal situation occurs, assisting managers to make quick and accurate response measures;

[0042] (3) The present invention uses an algorithm to calculate and adjust the weight values ​​of different paths in real time. The system can provide the safest and fastest evacuation route suggestions for personnel evacuation. This function is particularly important in emergency situations, which can significantly improve the safety factor of personnel and reduce the risk of injury caused by improper evacuation.

[0043] These and other aspects of the present application will be more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0045] Figure 1 A flow chart of a method for planning a personnel evacuation route in the event of a gas leak provided in an embodiment of the present application;

[0046] Figure 2 A system diagram of a method for planning a personnel evacuation route in the event of a gas leak provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0048] First, the key words in the embodiments of the present application are explained:

[0049] Gas detection device: A device used to detect whether there are harmful gases in a specific environment or whether the gas concentration exceeds the safety standard. It can detect many types of gases, such as carbon monoxide, methane, etc.

[0050] Unique ID: Each gas detection device has a unique identification code that is used to distinguish different devices on the network.

[0051] Coordinates: refers to the location information of the gas detection device in the physical space, usually expressed using longitude and latitude or a specific coordinate system inside a building.

[0052] Gas Link Control Protocol: A self-developed, high-efficiency communication protocol used for data exchange between gas detection devices and path safety controllers.

[0053] Spatial topology map: A graphical interface showing the location relationship and attribute information of all registered gas detection devices, which helps to quickly understand the site layout and potential risk points.

[0054] See also Figure 1 , is a flow chart of a method for planning a personnel evacuation route in case of gas leakage provided in an embodiment of the present application, which specifically includes the following steps:

[0055] S101 is a detection device registration step in which the gas detection device encapsulates its own unique identity, coordinates, and supported gas types into a registration request package, and sends the registration request package to the path safety controller through the gas link control protocol to apply for registration.

[0056] Specifically, the gas link control protocol includes a request type part, a device information part, a gas information part and an alarm indication part:

[0057] The request type part is used to identify the purpose of initiating the gas link control protocol request, including gas detection device registration, weight configuration issuance, leakage risk reporting, evacuation route instruction issuance and request confirmation;

[0058] The device information part is used to identify the device information that can verify the unique identity of the initiator of the gas link control protocol;

[0059] The gas information part is used to identify data information of different gas types that need to be reported; the data information of different gas types includes gas type, gas concentration, duration of gas concentration exceeding the safety threshold, weight of gas type, weight of duration of gas concentration exceeding the safety threshold, and gas leakage risk value;

[0060] The alarm indication part is used to indicate the direction of the evacuation route.

[0061] Specifically, the detection device registration step specifically includes:

[0062] The gas detection device fills the gas detection device registration into the request type part, fills its own unique identity and coordinates into the device information part, fills the supported gas type into the gas information part, and generates a gas detection device registration request;

[0063] The gas detection device obtains the IP address and port of the path safety controller and sends a registration request of the gas detection device to the address of the path safety controller;

[0064] The path security controller resolves the received gas detection device registration request and confirms the legitimacy of the gas detection device through the device information part; if it is legal, the path security controller generates a request confirmation data packet and sends it to the gas detection device, indicating that the registration is successful; if it is illegal, the gas detection device registration request is directly discarded, indicating that the registration of the gas detection device is abnormal.

[0065] Specifically, suppose that in a chemical plant, there is a new gas detection device (ID: G001) that needs to be registered to the path safety controller (IP address: 192.168.1.100, port: 8080). The gas detection device supports the detection of carbon monoxide (CO) and hydrogen sulfide (H2S). After the gas detection device is started, it first generates a registration request packet containing its own unique identity (G001), coordinates (10, 20, 5) and the gas type supported for detection (CO, H2S).

[0066] After generating the registration request packet, the gas detection device sends the request packet to the specified address (192.168.1.100:8080) of the path safety controller through the gas link control protocol. After receiving the registration request packet, the path safety controller first parses the content of the request packet to extract the request type, device information, and gas information. The path safety controller confirms the legitimacy of the gas detection device through the device information part. If the unique identification of the device (G001) exists in the list of legal devices of the path safety controller, the device is considered legal.

[0067] The path safety controller sends a registration success confirmation packet back to the gas detection device, indicating that the registration is successful. After the gas detection device receives the confirmation packet, it confirms that the registration process is complete and can start normal operation. If the path safety controller does not find the device's unique identification (G001) in the list of legal devices, it considers the device illegal.

[0068] S102 is a step of generating a spatial topology map. The path safety controller receives and parses a registration request packet of the gas detection device, and generates a visualized spatial topology map of the gas detection device based on the acquired unique identification, coordinates, and gas types supported for detection of the gas detection device.

[0069] Specifically, the step of generating the spatial topology map includes:

[0070] Based on the acquired coordinates of the gas detection device, the path safety controller generates a spatial topology map that visualizes the location information of the registered gas detection device. The spatial topology map can be used to intuitively confirm the identity, coordinates, gas types supported for detection, and weight configuration information of the gas detection device, and supports modification of the weight configuration of the gas detection device through the spatial topology map.

[0071] Specifically, the spatial topology map not only provides the location information of the equipment, but also integrates the equipment status monitoring, data analysis and early warning functions, so that managers can quickly grasp the real-time status of each monitoring point, and achieve early detection and early treatment of possible safety hazards, effectively improving the efficiency and response speed of safety management. The design of the spatial topology map fully considers user-friendliness and adopts a graphical interface so that non-professionals can easily understand complex monitoring data. At the same time, the system supports custom setting of alarm rules. For example, when the concentration of a certain gas exceeds the preset value, the corresponding device icon will change color or flash, accompanied by a sound prompt, so as to remind managers to take action in time. In addition, the spatial topology map also has a historical data query function, allowing users to trace monitoring records within a specific time period, which is of great significance for accident investigation and trend analysis. In order to adapt to the needs of different scenarios, administrators can flexibly adjust the weight configuration of each gas detection device through the spatial topology map interface, such as optimizing the detection strategy in time according to the actual environmental conditions and changes in safety standards to ensure the continuous effectiveness of the system.

[0072] S103 is a weight configuration sending step, in which the path safety controller receives the weight configuration of the gas type, gas concentration and the duration of the gas concentration exceeding the safety threshold, and sends the weight configuration to all successfully registered gas detection devices through the gas link control protocol.

[0073] Specifically, the weight configuration issuing step specifically includes:

[0074] The path safety controller receives the weight configuration modification of the gas detection device, sends the weight configuration and fills it into the request type part, fills the unique identity of the path safety controller into the device information part, fills the modified weight configuration into the gas information part, and generates a weight configuration modification request;

[0075] The path safety controller obtains the IP address and port of the gas detection device and sends a weight configuration modification request to the gas detection device.

[0076] S104 evacuation path planning step, the gas detection device calculates whether there is a leakage risk of the gas type based on the issued weight, and reports the gas type with leakage risk and its corresponding gas concentration and the duration of the gas concentration exceeding the safety threshold through the gas link control protocol. The path safety controller analyzes the data reported by all registered gas detection devices based on the spatial topology map, generates the optimal evacuation route, and sends it to all registered gas detection devices through the gas link control protocol.

[0077] The evacuation path planning step specifically includes:

[0078] The gas detection device detects whether there is a leakage risk at present based on the weight of gas type, gas concentration and the duration that the gas concentration exceeds the safety threshold. The formula is as follows:

[0079] ;

[0080] in, represents the weight of the gas type, represents the weight of gas concentration, The weight representing the duration that the gas concentration exceeds the safety threshold, Indicates the currently detected gas concentration. Indicates the duration that the currently detected gas concentration exceeds the threshold. Used to reflect the impact of gas type on leakage risk. Indicates the leakage risk value;

[0081] When the leakage risk value exceeds the threshold, it is considered that there is a leakage risk;

[0082] The gas detection device fills the leakage risk report into the request type part, fills its own unique identity and coordinates into the device information part, fills the gas type, gas concentration, duration of gas concentration exceeding the safety threshold and leakage risk value into the gas information part, and generates a leakage risk reporting request;

[0083] The gas detection device obtains the IP address and port of the path safety controller and sends a leakage risk reporting request to the path safety controller;

[0084] The path safety controller receives and parses the leakage risk reporting request, analyzes the leakage risk values ​​of the gas detection devices on all evacuable paths, obtains the evacuation path with the least total leakage risk, fills in the alarm indication part, and sends an evacuation route indication request to the gas detection device.

[0085] S105 alarm triggering and path indication step: the registered gas detection device triggers an alarm based on the optimal evacuation route and turns on the direction lights to indicate the evacuation direction.

[0086] Specifically, after the gas detection device receives the evacuation route instruction request sent by the path safety controller, it parses the optimal evacuation path information in the request, and the device immediately triggers the built-in alarm system, sounds an audible and visual alarm, and reminds on-site personnel to evacuate. At the same time, the direction indicator light on the device lights up according to the direction of the optimal evacuation path, guiding personnel to evacuate quickly in the correct direction. The direction indicator light can be in the form of arrow indication or digital numbering to ensure that personnel can intuitively and quickly identify the evacuation path. In addition, the gas detection device will also update the status regularly to ensure that the alarm and indicator light remain effective until all personnel are safely evacuated. This process ensures that in an emergency, personnel can evacuate quickly and orderly to minimize danger.

[0087] Please refer to Figure 2 , provides a personnel evacuation route planning system in case of gas leakage, the system comprising:

[0088] S201 detection device registration module, used for the gas detection device to encapsulate its own unique identity, coordinates and supported gas types into a registration request packet, and send the registration request packet to the path safety controller to apply for registration through the gas link control protocol;

[0089] S202: a spatial topology map generation module, in which the path safety controller receives and parses the registration request packet of the gas detection device, and generates a visualized spatial topology map of the gas detection device based on the acquired unique identity, coordinates, and gas types supported for detection of the gas detection device;

[0090] S203 weight configuration sending module, used for the path safety controller to receive the weight configuration of gas type, gas concentration and duration of gas concentration exceeding the safety threshold, and send the weight configuration to all successfully registered gas detection devices through the gas link control protocol;

[0091] S204 evacuation path planning module, which is used for the gas detection device to calculate whether there is a leakage risk of the gas type according to the weight issued, and report the gas type with leakage risk and its corresponding gas concentration and the duration of the gas concentration exceeding the safety threshold through the gas link control protocol. The path safety controller analyzes the data reported by all registered gas detection devices based on the spatial topology map, generates the optimal evacuation route, and sends it to all registered gas detection devices through the gas link control protocol;

[0092] The S205 alarm triggering and path indication module is used for registered gas detection devices to trigger an alarm based on the optimal evacuation route and turn on the direction lights to indicate the evacuation direction.

[0093] The specific implementation of a system for planning a route for evacuating personnel during a gas leak is the same as the method for planning a route for evacuating personnel during a gas leak, and will not be described repeatedly in this embodiment.

[0094] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for planning a personnel evacuation route in case of gas leakage, characterized in that: The following steps are involved: In the detection device registration step, the gas detection device encapsulates its unique identity, coordinates and supported gas types into a registration request packet, and sends the registration request packet to the path safety controller through the gas link control protocol to apply for registration; In the step of generating a spatial topology map, the path safety controller receives and parses the registration request packet of the gas detection device, and generates a visualized spatial topology map of the gas detection device based on the acquired unique identity identifier, coordinates, and gas types supported for detection of the gas detection device; In the step of sending weight configuration, the path safety controller receives the weight configuration of gas type, gas concentration and duration of gas concentration exceeding the safety threshold, and sends the weight configuration to all successfully registered gas detection devices through the gas link control protocol; In the evacuation path planning step, the gas detection device calculates whether there is a leakage risk of the gas type based on the weight issued, and reports the gas type with leakage risk and its corresponding gas concentration and the duration of the gas concentration exceeding the safety threshold through the gas link control protocol. The path safety controller analyzes the data reported by all registered gas detection devices based on the spatial topology map, generates the optimal evacuation route, and sends it to all registered gas detection devices through the gas link control protocol; In the alarm triggering and route indication step, the registered gas detection device triggers the alarm based on the optimal evacuation route and turns on the direction light to indicate the evacuation direction; The gas link control protocol includes a request type part, a device information part, a gas information part and an alarm indication part: The request type part is used to identify the purpose of initiating the gas link control protocol request, including gas detection device registration, weight configuration issuance, leakage risk reporting, evacuation route instruction issuance and request confirmation; The device information part is used to identify the device information that can verify the unique identity of the initiator of the gas link control protocol; The gas information part is used to identify data information of different gas types that need to be reported; the data information of different gas types includes gas type, gas concentration, duration of gas concentration exceeding the safety threshold, weight of gas type, weight of duration of gas concentration exceeding the safety threshold, and gas leakage risk value; The alarm indication part is used to indicate the direction of the evacuation route; The detection device registration step specifically includes: The gas detection device fills the gas detection device registration into the request type part, fills its own unique identity and coordinates into the device information part, fills the supported gas type into the gas information part, and generates a gas detection device registration request; The gas detection device obtains the IP address and port of the path safety controller and sends a registration request of the gas detection device to the address of the path safety controller; The path security controller resolves the received gas detection device registration request and confirms the legitimacy of the gas detection device through the device information part; if it is legal, the path security controller generates a request confirmation data packet and sends it to the gas detection device, indicating that the registration is successful; if it is illegal, the gas detection device registration request is directly discarded, indicating that the registration of the gas detection device is abnormal.

2. The method for planning a personnel evacuation route in case of gas leakage according to claim 1, characterized in that: The step of generating the spatial topology map specifically includes: Based on the acquired coordinates of the gas detection device, the path safety controller generates a spatial topology map that visualizes the location information of the registered gas detection device. The spatial topology map can be used to intuitively confirm the identity, coordinates, gas types supported for detection, and weight configuration information of the gas detection device, and supports modification of the weight configuration of the gas detection device through the spatial topology map.

3. The method for planning a personnel evacuation route in case of gas leakage according to claim 2, characterized in that: The weight configuration delivery step specifically includes: The path safety controller receives the weight configuration modification of the gas detection device, sends the weight configuration and fills it into the request type part, fills the unique identity of the path safety controller into the device information part, fills the modified weight configuration into the gas information part, and generates a weight configuration modification request; The path safety controller obtains the IP address and port of the gas detection device and sends a weight configuration modification request to the gas detection device.

4. The method for planning a personnel evacuation route in case of gas leakage according to claim 3, characterized in that: The evacuation path planning step specifically includes: The gas detection device detects whether there is a leakage risk at present based on the weight of gas type, gas concentration and the duration that the gas concentration exceeds the safety threshold. The formula is as follows: ； in, represents the weight of the gas type, represents the weight of gas concentration, The weight representing the duration that the gas concentration exceeds the safety threshold, Indicates the currently detected gas concentration. Indicates the duration that the currently detected gas concentration exceeds the threshold. Used to reflect the impact of gas type on leakage risk. Indicates the leakage risk value; When the leakage risk value exceeds the threshold, it is considered that there is a leakage risk; The gas detection device fills the leakage risk report into the request type part, fills its own unique identity and coordinates into the device information part, fills the gas type, gas concentration, duration of gas concentration exceeding the safety threshold and leakage risk value into the gas information part, and generates a leakage risk reporting request; The gas detection device obtains the IP address and port of the path safety controller and sends a leakage risk reporting request to the path safety controller; The path safety controller receives and parses the leakage risk reporting request, analyzes the leakage risk values ​​of the gas detection devices on all evacuable paths, obtains the evacuation path with the least total leakage risk, fills in the alarm indication part, and sends an evacuation route indication request to the gas detection device.

5. A system based on the method for planning a personnel evacuation route in case of gas leakage according to any one of claims 1 to 4, characterized in that: include: The detection device registration module is used for the gas detection device to encapsulate its own unique identity, coordinates and supported gas types into a registration request packet, and send the registration request packet to the path safety controller to apply for registration through the gas link control protocol; The spatial topology map generation module, the path safety controller receives and parses the registration request packet of the gas detection device, and generates a visualized spatial topology map of the gas detection device based on the acquired unique identity, coordinates and gas types supported for detection of the gas detection device; A weight configuration sending module is used for the path safety controller to receive the weight configuration of the gas type, gas concentration and the duration of the gas concentration exceeding the safety threshold, and send the weight configuration to all successfully registered gas detection devices through the gas link control protocol; The evacuation path planning module is used for the gas detection device to calculate whether there is a leakage risk of the gas type according to the weight issued, and report the gas type with leakage risk and its corresponding gas concentration and the duration of the gas concentration exceeding the safety threshold through the gas link control protocol. The path safety controller analyzes the data reported by all registered gas detection devices based on the spatial topology map, generates the optimal evacuation route, and sends it to all registered gas detection devices through the gas link control protocol; The alarm triggering and path indication module is used for registered gas detection devices to trigger an alarm based on the optimal evacuation route, and turn on the direction lights to indicate the evacuation direction.

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