CN115171321B - BIM-based intelligent fire control management system and method - Google Patents
BIM-based intelligent fire control management system and method Download PDFInfo
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/002—Distress signalling devices, e.g. rescue balloons
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- G—PHYSICS
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/32—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving rectilinearly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
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Abstract
The invention relates to an intelligent fire control management system based on BIM, comprising: a space construction module; a video monitoring module; the picture processing module is used for analyzing the picture frames to obtain picture information; the coordinate statistical analysis module is used for obtaining the personnel number N corresponding to the access destination coordinate P; the fire detection module is used for monitoring the fire condition at the position of the detection node in real time; the disaster analysis module is used for analyzing the fire at the position of the detection node to obtain the coordinate of the fire influence range; route analysis module, safety coefficient s of escape channel line coordinate i Sorting from big to small; and the evacuation indication module is used for indicating personnel evacuation. The invention also discloses a fire control management method of the intelligent fire control management system based on the BIM. The whole process of the invention does not need to be manually participated, has strong intelligence and wide application, and can be widely used in the fields of intelligent transportation, environmental protection, public safety, safe home, intelligent fire protection, industrial monitoring and the like.
Description
Technical Field
The invention relates to the technical field of intelligent fire control, in particular to an intelligent fire control management system and method based on BIM.
Background
In the prior art, although there are fire prevention and control systems, such as building automation intelligent systems based on smoke sensing probes and spray heads, an indoor fire control system refers to a facility system installed indoors to extinguish a fire occurring in a building at an initial stage. The fire hydrant system mainly comprises an indoor fire hydrant system, an automatic water spraying fire-fighting system, a water mist fire-extinguishing system, a foam fire-extinguishing system, a carbon dioxide fire-extinguishing system, a haloalkane fire-extinguishing system, a dry powder fire-extinguishing system and the like. Installing an indoor fire protection system is an effective and necessary safety measure as evidenced by fire statistics. However, the conventional fire fighting device is basically based on manual control and lacks intelligence.
The problem of manual control has been solved in the appearance of BIM technique and thing networking, and the usage is extensive, and is spread over a plurality of fields such as intelligent transportation, environmental protection, government work, public security, safe house, intelligent fire control, industrial monitoring, environmental monitoring, street lamp illumination control, view illumination control, building illumination control, square illumination control, old man's nursing, personal health, flower cultivation, water system monitoring, food tracing, investigation of enemy situation and information collection.
The existing fire-fighting system has weak monitoring capability and insufficient conveying capability.
Disclosure of Invention
The invention aims at providing the intelligent fire control management system based on the BIM, which does not need manual control, has strong intelligence and wide application.
In order to achieve the above purpose, the present invention adopts the following technical scheme: an intelligent fire management system based on BIM, comprising:
the space construction module is used for constructing a space coordinate system, and placing the monitoring area model constructed through BIM into the space coordinate system to obtain a shunt node, a channel and an access destination coordinate P;
the video monitoring module is arranged at the entrance of the monitoring area and used for acquiring the personnel video entering the monitoring area and intercepting the personnel video to obtain a picture frame;
the picture processing module is used for analyzing the picture frames to obtain picture information and obtaining access destination coordinates P through the picture information;
the coordinate statistical analysis module is used for counting the same access destination coordinate P in real time to obtain the personnel number N corresponding to the access destination coordinate P, wherein the personnel number N is obtained by subtracting the outgoing personnel from the incoming personnel, and the access destination coordinate P-the personnel number N is implanted into the space coordinate system;
the fire detection module is arranged at the position of the detection node and used for monitoring the fire condition at the position of the detection node in real time;
the disaster analysis module is used for analyzing the fire condition at the position of the detection node to obtain the fire condition influence range coordinate, namely the escape blocking node coordinate;
the route analysis module is used for receiving the escape blocking node coordinates and the shunting node coordinates, connecting the shunting node coordinates to obtain escape channel line coordinates, and according to the escape blocking node coordinate distance L i Calculating the safety coefficient s of each escape passage line coordinate i Safety coefficient s for line coordinates of escape passage i Sorting from big to small; the escape blocking node coordinate distance L i The vertical distance between the coordinates of the escape blocking node and the coordinates of the escape passage line is the vertical distance;
and the evacuation indication module is arranged on the shunt node and used for indicating evacuation of people.
The picture processing module comprises:
the information comparison module is used for searching a preset picture information-personnel information table through the picture information to compare, judging whether the picture information-personnel information table belongs to the picture information-personnel information table or not, if so, judging that the picture information-personnel information table is an intra-personnel, otherwise, judging that the picture information-personnel information table is an extra-personnel;
the target acquisition module searches a picture information-personnel information table through the picture information when the personnel is judged to be the personnel in the editor, and obtains an access target coordinate P; and when the personnel are judged to be the editors, alarming is carried out to remind the security personnel to inquire.
The detection node positions are the roofs of houses, corridor roofs and places where disaster is easy to happen on the roofs of rooms, and the detection module adopts a smoke sensor, a temperature sensor and an infrared sensor.
The evacuation indication module adopts indication boards, indication screens and performs three-dimensional display on the monitoring area model.
The object acquisition module includes:
the voice interaction terminal is used for outputting voice to inquire about the registration questions of the editorial personnel when the editorial personnel are judged, obtaining reply voice and converting the reply voice into text information;
the information searching module extracts keywords from the text information to obtain access destination, searches a preset destination-registration information record table through the destination to obtain registration information, judges whether the text information is matched with the registration information, obtains access destination coordinates P from the registration information and releases the access destination coordinates P if the text information is matched with the registration information, otherwise, sends an inquiry signal, and performs personnel inquiry registration after security personnel receive the inquiry signal.
Another object of the present invention is to provide a fire control management method of a BIM-based intelligent fire control management system, the method comprising the following sequential steps:
(1) Constructing a space coordinate system;
(2) Acquiring a personnel video entering a monitoring area, and intercepting the personnel video to acquire a picture frame;
(3) Analyzing the picture frame to obtain picture information, and obtaining access destination coordinates P through the picture information;
(4) Counting the same access destination coordinate P in real time to obtain the number N of people corresponding to the access destination coordinate P;
(5) Monitoring fire conditions at the positions of the detection nodes in real time;
(6) Analyzing the fire condition at the position of the detection node to obtain a fire condition influence range coordinate, namely an escape blocking node coordinate;
(7) Receiving the escape blocking node coordinates and the shunting node coordinates, connecting the shunting node coordinates to obtain escape channel line coordinates, and according to the escape blocking node coordinate distance L i Calculating the safety coefficient s of each escape passage line coordinate i Escape blocking node coordinate distance L i The vertical distance between the coordinates of the escape blocking node and the coordinates of the escape passage line is the vertical distance;
(8) For safety factor s i And indicating the maximum line coordinate of the escape passage.
In the step (6), the method for calculating the fire influence range coordinates includes: judging the temperature T detected by the fire detection module i If the temperature is larger than a preset set temperature T ', if the temperature is larger than the preset set temperature T', obtaining the position coordinates of the corresponding detection nodes, and connecting the coordinates in sequence to form a closed space; the closed space is of a planar circular structure or a spherical or flat three-dimensional structure, the forming method of the closed space comprises the steps of connecting node position coordinates two by two, and calculating to obtain the length LC of each line segment ij Wherein i and j are node position coordinate numbers, i is not equal to j, and min { LC is obtained by calculation ij And min { LC } ij Sequentially connecting to obtain a closed space;
calculating the radiation distance:
wherein t is the tolerance temperature of the human body, and lambda is the heat radiation loss coefficient; calculating to obtain a cross point coordinate of the channel coordinate and the closed space, extending along the channel coordinate to the opposite direction of the center of the closed space, wherein the extension is a radiation distance d, so as to obtain an escape blocking node coordinate; the coordinates of the escape blocking nodes are the coordinates of the fire influence range.
In step (7), the safety factor s i The calculation formula of (2) is as follows:
wherein L is i The coordinate distance of the escape blocking node is a fire spreading factor, and S is an escape stroke.
According to the technical scheme, the beneficial effects of the invention are as follows: according to the invention, a space coordinate system is constructed, a person video entering a monitoring area is obtained, the person video is intercepted to obtain a picture frame, the picture frame is analyzed to obtain picture information, an access destination coordinate P is obtained through the picture information, statistics is carried out on the same access destination coordinate P in real time to obtain the number N of persons corresponding to the access destination coordinate P, the fire condition at the position of a detection node is monitored in real time, and the fire condition at the position of the detection node is analyzed to obtain a fire condition influence range coordinate and an escape blocking node coordinate; receiving the escape blocking node coordinates and the shunting node coordinates, connecting the shunting node coordinates to obtain escape channel line coordinates, and according to the escape blocking node coordinate distance L i Calculating the safety coefficient s of each escape passage line coordinate i For safety factor s i The maximum escape passage line coordinate indicates, the whole process does not need manual participation, the intellectualization is strong, the application is wide, and the method is applicable to the fields of intelligent transportation, environmental protection, government work, public safety, safe home, intelligent fire protection, industrial monitoring and the like.
Drawings
FIG. 1 is a block diagram of the circuit architecture of the present system;
FIG. 2 is a block diagram of the circuit configuration of the picture processing module of FIG. 1;
fig. 3 is a flow chart of the present method.
Detailed Description
As shown in fig. 1, a BIM-based intelligent fire control management system includes:
the space construction module is used for constructing a space coordinate system, and placing the monitoring area model constructed through BIM into the space coordinate system to obtain a shunt node, a channel and an access destination coordinate P; the monitoring area comprises an open area, a building and an environment inside the building, and each access destination coordinate P, a shunt node and a channel are implanted into a space coordinate system, such as each building coordinate, address coordinates of each owner in the building and the like.
The video monitoring module is arranged at the entrance of the monitoring area and used for acquiring the personnel video entering the monitoring area and intercepting the personnel video to obtain a picture frame; the video monitoring module adopts a camera.
The picture processing module is used for analyzing the picture frames to obtain picture information and obtaining access destination coordinates P through the picture information;
the coordinate statistical analysis module is used for counting the same access destination coordinate P in real time to obtain the personnel number N corresponding to the access destination coordinate P, wherein the personnel number N is obtained by subtracting the outgoing personnel from the incoming personnel, and the access destination coordinate P-the personnel number N is implanted into the space coordinate system; for example, the number of people to the 1809 room is 18, wherein the number of people entering the office on duty is 21, the number of people going out halfway is 3, and the rest 18 people, the coordinate position of the 1809 room in the office space coordinate system is calibrated to be 18;
the fire detection module is arranged at the position of the detection node and used for monitoring the fire condition at the position of the detection node in real time;
the disaster analysis module is used for analyzing the fire condition at the position of the detection node to obtain the fire condition influence range coordinate, namely the escape blocking node coordinate;
the route analysis module is used for receiving the escape blocking node coordinates and the shunting node coordinates, and shunting the nodesThe point coordinates are connected to obtain the line coordinates of the escape passage, and the escape blocking node coordinate distance L is used for the escape i Calculating the safety coefficient s of each escape passage line coordinate i Safety coefficient s for line coordinates of escape passage i Sorting from big to small; the escape blocking node coordinate distance L i The vertical distance between the coordinates of the escape blocking node and the coordinates of the escape passage line is the vertical distance;
and the evacuation indication module is arranged on the shunt node and used for indicating evacuation of people.
As shown in fig. 2, the picture processing module includes:
the information comparison module is used for searching a preset picture information-personnel information table through the picture information to compare, judging whether the picture information-personnel information table belongs to the picture information-personnel information table or not, if so, judging that the picture information-personnel information table is an intra-personnel, otherwise, judging that the picture information-personnel information table is an extra-personnel;
the target acquisition module searches a picture information-personnel information table through the picture information when the personnel is judged to be the personnel in the editor, and obtains an access target coordinate P; and when the personnel are judged to be the editors, alarming is carried out to remind the security personnel to inquire.
For example, when the company gets on a 24-layer office, the company obtains the face picture frame of the plum four through the video monitoring module when the company passes through the gate, the picture processing module processes the face picture frame of the plum four to obtain picture information, and the picture information-personnel information table can be constructed by the job of the plum four, wherein the picture information, the name, the age, the home address, the work unit, the work address (1809 number of the building) of the plum four are included in the picture information-personnel information table. And obtaining the fourth building personnel, namely the personnel in the building, through comparison, and accessing a room with a target coordinate P of 1809.
The detection node positions are the roofs of houses, corridor roofs and places where disaster is easy to happen on the roofs of rooms, and the detection module adopts a smoke sensor, a temperature sensor and an infrared sensor.
The evacuation indication module adopts indication boards, indication screens and performs three-dimensional display on the monitoring area model. The three-dimensional display is used for displaying the optimal escape passage in the monitoring area model, and the escape route can be better displayed through the three-dimensional display, so that the indication capability is strong, and the escape route is clear at a glance.
The object acquisition module includes:
the voice interaction terminal is used for outputting voice to inquire about the registration questions of the editorial personnel when the editorial personnel are judged, obtaining reply voice and converting the reply voice into text information;
the information searching module extracts keywords from the text information to obtain access destination, searches a preset destination-registration information record table through the destination to obtain registration information, judges whether the text information is matched with the registration information, obtains access destination coordinates P from the registration information and releases the access destination coordinates P if the text information is matched with the registration information, otherwise, sends an inquiry signal, and performs personnel inquiry registration after security personnel receive the inquiry signal.
For example, when an external person opens a three-way gate, a video monitoring module obtains a picture frame of the face of the person, and processes the picture frame to obtain picture information, and the picture information is determined as the external person. The voice interaction terminal inquires the names, ages, visiting house numbers, affairs posts, target person names and the like of external persons, the visiting purpose is a house number, and a preset house number-registration information record list is searched through the house number to obtain registration information. The registration information is the name, occupation and the like of the owner, whether the name of the target person is the same as the name of the owner or not is judged, and if the name of the target person is judged to be different, the security personnel performs manual inquiry, the access target can be input after the inquiry passes, and the access target can be input through voice.
As shown in fig. 3, the method comprises the following sequential steps:
(1) Constructing a space coordinate system;
(2) Acquiring a personnel video entering a monitoring area, and intercepting the personnel video to acquire a picture frame;
(3) Analyzing the picture frame to obtain picture information, and obtaining access destination coordinates P through the picture information;
(4) Counting the same access destination coordinate P in real time to obtain the number N of people corresponding to the access destination coordinate P;
(5) Monitoring fire conditions at the positions of the detection nodes in real time;
(6) Analyzing the fire condition at the position of the detection node to obtain a fire condition influence range coordinate and an escape blocking node coordinate;
(7) Receiving the escape blocking node coordinates and the shunting node coordinates, connecting the shunting node coordinates to obtain escape channel line coordinates, and according to the escape blocking node coordinate distance L i Calculating the safety coefficient s of each escape passage line coordinate i Escape blocking node coordinate distance L i The vertical distance between the coordinates of the escape blocking node and the coordinates of the escape passage line is the vertical distance;
(8) For safety factor s i And indicating the maximum line coordinate of the escape passage.
In the step (6), the method for calculating the fire influence range coordinates includes: judging the temperature T detected by the fire detection module i If the temperature is larger than a preset set temperature T ', if the temperature is larger than the preset set temperature T', obtaining the position coordinates of the corresponding detection nodes, and connecting the coordinates in sequence to form a closed space; the closed space is of a planar circular structure or a spherical or flat three-dimensional structure, the forming method of the closed space comprises the steps of connecting node position coordinates two by two, and calculating to obtain the length LC of each line segment ij Wherein i and j are node position coordinate numbers, i is not equal to j, and min { LC is obtained by calculation ij And min { LC } ij Sequentially connecting to obtain a closed space;
calculating the radiation distance:
wherein t is the tolerance temperature of the human body, and lambda is the heat radiation loss coefficient; calculating to obtain a cross point coordinate of the channel coordinate and the closed space, extending along the channel coordinate to the opposite direction of the center of the closed space, wherein the extension is a radiation distance d, so as to obtain an escape blocking node coordinate; the coordinates of the escape blocking nodes are the coordinates of the fire influence range. Here, the channel coordinates refer to coordinates of the channel obtained by the space construction module.
In step (7), the safety factor s i The calculation formula of (2) is as follows:
wherein L is i For escape blocking node coordinate distance, a is fire spreading factor, which can be obtained empirically, and mainly affects smoke concentration, fire spreading speed, etc., and S is escape journey.
The path analysis module calculates access destination coordinates P and a safety coefficient s by accessing the destination coordinates P and the number of people N i Travel T between the coordinates of the escape route lines i And calculate and obtain the channel arrival timeWherein v is the average escape speed, b is the adjustment coefficient, and t is the sum of the escape speed and the escape speed i ±t 0 The evacuee of (1) calculates to obtain the escape flow Q, wherein t is 0 Is a predetermined time error. Judging whether the escape flow Q is larger than a preset Q ', wherein Q' can be determined according to the channel width, and if so, the evacuation indication module determines the safety coefficient s i Indicating the line coordinates of the escape route, otherwise, the evacuation indicating module performs a safety factor s on the access destination coordinates P exceeding Q' i+1 Is indicated by the line coordinates of the escape passage.
Claims (5)
1. An intelligent fire control management system based on BIM, its characterized in that: comprising the following steps:
the space construction module is used for constructing a space coordinate system, and placing the monitoring area model constructed through BIM into the space coordinate system to obtain a shunt node, a channel and an access destination coordinate P;
the video monitoring module is arranged at the entrance of the monitoring area and used for acquiring the personnel video entering the monitoring area and intercepting the personnel video to obtain a picture frame;
the picture processing module is used for analyzing the picture frames to obtain picture information and obtaining access destination coordinates P through the picture information;
the coordinate statistical analysis module is used for counting the same access destination coordinate P in real time to obtain the personnel number N corresponding to the access destination coordinate P, wherein the personnel number N is obtained by subtracting the outgoing personnel from the incoming personnel, and the access destination coordinate P-the personnel number N is implanted into the space coordinate system;
the fire detection module is arranged at the position of the detection node and used for monitoring the fire condition at the position of the detection node in real time;
the disaster analysis module is used for analyzing the fire condition at the position of the detection node to obtain the fire condition influence range coordinate, namely the escape blocking node coordinate; judging the temperature T detected by the fire detection module i If the temperature is larger than a preset set temperature T ', if the temperature is larger than the preset set temperature T', obtaining the position coordinates of the corresponding detection nodes, and connecting the coordinates in sequence to form a closed space; the closed space is of a planar circular structure or a spherical or flat three-dimensional structure, the forming method of the closed space comprises the steps of connecting node position coordinates two by two, and calculating to obtain the length LC of each line segment ij Wherein i and j are node position coordinate numbers, i is not equal to j, and min { LC is obtained by calculation ij And min { LC } ij Sequentially connecting to obtain a closed space;
calculating the radiation distance:
wherein t is the tolerance temperature of the human body, and lambda is the heat radiation loss coefficient; calculating to obtain a cross point coordinate of the channel coordinate and the closed space, extending along the channel coordinate to the opposite direction of the center of the closed space, wherein the extension is a radiation distance d, so as to obtain an escape blocking node coordinate; the escape blocking node coordinates are fire condition influence range coordinates;
a route analysis module for receivingThe escape blocking node coordinates and the shunting node coordinates are connected to obtain escape channel line coordinates according to the escape blocking node coordinates and the escape blocking node coordinates distance L i Calculating the safety coefficient s of each escape passage line coordinate i Safety coefficient s for line coordinates of escape passage i Sorting from big to small; the escape blocking node coordinate distance L i The vertical distance between the coordinates of the escape blocking node and the coordinates of the escape passage line is the vertical distance; said safety factor s i The calculation formula of (2) is as follows:
wherein L is i The coordinate distance of the escape blocking node is a fire spreading factor, and S is an escape stroke;
the evacuation indication module is arranged on the shunt node and used for indicating evacuation of people;
the picture processing module comprises:
the information comparison module is used for searching a preset picture information-personnel information table through the picture information to compare, judging whether the picture information-personnel information table belongs to the picture information-personnel information table or not, if so, judging that the picture information-personnel information table is an intra-personnel, otherwise, judging that the picture information-personnel information table is an extra-personnel;
the target acquisition module searches a picture information-personnel information table through the picture information when the personnel is judged to be the personnel in the editor, and obtains an access target coordinate P; and when the personnel are judged to be the editors, alarming is carried out to remind the security personnel to inquire.
2. The BIM-based intelligent fire management system of claim 1, wherein: the detection node positions are the roofs of houses, corridor roofs and places where disaster is easy to happen on the roofs of rooms, and the detection module adopts a smoke sensor, a temperature sensor and an infrared sensor.
3. The BIM-based intelligent fire management system of claim 1, wherein: the evacuation indication module adopts indication boards, indication screens and performs three-dimensional display on the monitoring area model.
4. The BIM-based intelligent fire management system of claim 1, wherein: the object acquisition module includes:
the voice interaction terminal is used for outputting voice to inquire about the registration questions of the editorial personnel when the editorial personnel are judged, obtaining reply voice and converting the reply voice into text information;
the information searching module extracts keywords from the text information to obtain access destination, searches a preset destination-registration information record table through the destination to obtain registration information, judges whether the text information is matched with the registration information, obtains access destination coordinates P from the registration information and releases the access destination coordinates P if the text information is matched with the registration information, otherwise, sends an inquiry signal, and performs personnel inquiry registration after security personnel receive the inquiry signal.
5. The fire control management method of a BIM-based intelligent fire control management system according to any one of claims 1 to 4, wherein: the method comprises the following steps in sequence:
(1) Constructing a space coordinate system;
(2) Acquiring a personnel video entering a monitoring area, and intercepting the personnel video to acquire a picture frame;
(3) The image processing module analyzes the picture frame to obtain picture information, and obtains access destination coordinates P through the picture information; the picture processing module comprises:
the information comparison module is used for searching a preset picture information-personnel information table through the picture information to compare, judging whether the picture information-personnel information table belongs to the picture information-personnel information table or not, if so, judging that the picture information-personnel information table is an intra-personnel, otherwise, judging that the picture information-personnel information table is an extra-personnel;
the target acquisition module searches a picture information-personnel information table through the picture information when the personnel is judged to be the personnel in the editor, and obtains an access target coordinate P; when the personnel are judged to be the editors, alarming is carried out to remind security personnel to inquire;
(4) Counting the same access destination coordinate P in real time to obtain the number N of people corresponding to the access destination coordinate P;
(5) Monitoring fire conditions at the positions of the detection nodes in real time;
(6) Analyzing the fire condition at the position of the detection node to obtain a fire condition influence range coordinate, namely an escape blocking node coordinate;
(7) Receiving the escape blocking node coordinates and the shunting node coordinates, connecting the shunting node coordinates to obtain escape channel line coordinates, and according to the escape blocking node coordinate distance L i Calculating the safety coefficient s of each escape passage line coordinate i Escape blocking node coordinate distance L i The vertical distance between the coordinates of the escape blocking node and the coordinates of the escape passage line is the vertical distance;
(8) For safety factor s i Indicating the maximum escape passage line coordinate;
in the step (6), the method for calculating the fire influence range coordinates includes: judging the temperature T detected by the fire detection module i If the temperature is larger than a preset set temperature T ', if the temperature is larger than the preset set temperature T', obtaining the position coordinates of the corresponding detection nodes, and connecting the coordinates in sequence to form a closed space; the closed space is of a planar circular structure or a spherical or flat three-dimensional structure, the forming method of the closed space comprises the steps of connecting node position coordinates two by two, and calculating to obtain the length LC of each line segment ij Wherein i and j are node position coordinate numbers, i is not equal to j, and min { LC is obtained by calculation ij And min { LC } ij Sequentially connecting to obtain a closed space;
calculating the radiation distance:
wherein t is the tolerance temperature of the human body, and lambda is the heat radiation loss coefficient; calculating to obtain a cross point coordinate of the channel coordinate and the closed space, extending along the channel coordinate to the opposite direction of the center of the closed space, wherein the extension is a radiation distance d, so as to obtain an escape blocking node coordinate; the escape blocking node coordinates are fire condition influence range coordinates;
in the step (7) of the method,
said safety factor s i The calculation formula of (2) is as follows:
wherein L is i The coordinate distance of the escape blocking node is a fire spreading factor, and S is an escape stroke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210797776.5A CN115171321B (en) | 2022-07-08 | 2022-07-08 | BIM-based intelligent fire control management system and method |
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| CN202210797776.5A CN115171321B (en) | 2022-07-08 | 2022-07-08 | BIM-based intelligent fire control management system and method |
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