CN111667561B - Visual analysis and processing method for fire of large public building - Google Patents
Visual analysis and processing method for fire of large public building Download PDFInfo
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Abstract
The invention discloses a visual analysis processing method for fire of a large public building, which comprises the following steps that fire analysis needs to be carried out on a subway building, and the following steps are needed: the method comprises the steps of fire scene 360-degree panoramic image storage → fire scene material evidence reduction hotspot addition → roaming and skipping among a plurality of fire scene images → real scene and virtual character of the fire scene → animation creation of surrounding environment → fire scene image measurement → three-dimensional reconstruction of the fire scene → fire process animation simulation → reporting demonstration file of the fire scene. The invention utilizes the panoramic image, the scene real scene, the virtual character and the animation establishment of the surrounding environment and the scene image measurement to establish a virtual building engineering three-dimensional model, the digitization technology provides the subway building scene for the model, simulates the fire trend and the fire scene change in the building under different environments, compares the existing fire scene, and can be used as the fire early warning demonstration reference after the summary.
Description
Technical Field
The invention relates to the technical field of fire visible analysis and processing methods, in particular to a large-scale public building fire visible analysis and processing method.
Background
The large-scale public building refers to a public place with high concentration of personnel and large building area and space structure, and has the outstanding characteristics of large internal space, dense population and difficult evacuation. Once a fire disaster happens to the building, the fire and smoke spread quickly, people are difficult to evacuate, and serious injury is easily caused. With the development of economy and the gradual increase of urban construction, the number of urban high-rise buildings is increased, and the high-rise buildings are mostly positioned in the center of a city, so that once a fire disaster happens to the high-rise buildings, great loss is caused. In recent years, high-rise buildings have frequent fire disasters at home and abroad, which bring extremely bad influence on the society.
When a fire breaks out in a building, the evacuation action of people is not only related to the evacuation capacity of people, but also depends to a great extent on the spatial structure of the building, the evacuation capacity of evacuation channels, the fire protection performance of the building, the fire condition and the like. Therefore, in the high-rise building fire, the fire extinguishing strategy making and the personnel evacuation correct decision are important, and the computer simulation technology is used for simulating the high-rise building fire so as to provide a basis for fire fighting decision and fire analysis.
However, most of the existing buildings carry out fire early warning simulation on the site, follow-up fire reasons and fire occurrence positions are not analyzed and processed on the site after some fires, and effective disaster prevention demonstration can be provided for follow-up similar high-rise subway buildings.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a visual analysis and processing method for fire of a large public building.
The invention provides a visual analysis and processing method for fire of a large public building, which is characterized by comprising the following steps of:
s1: fire analysis needs to be carried out on subway buildings, and the following steps are required: the method comprises the steps of fire scene 360-degree panoramic image storage → fire scene material evidence reduction hotspot addition → roaming and jumping among a plurality of fire scene images → real scene and virtual character of the fire scene → animation creation of the surrounding environment → fire scene image measurement → three-dimensional reconstruction of the fire scene → animation simulation of the fire process → reporting demonstration file on the fire scene;
s2: and (3) storing a 360-degree panoramic image of a fire scene: through the functions of white balance, exposure compensation, HDR and the like in a professional camera, a fire scene image can be clearly and accurately recorded in an indoor environment with weak light;
s3: adding a fire scene material evidence reduction hotspot: a process of extracting trace material evidence which can prove the cause of the fire, and a system investigation work of making a fire conclusion through field analysis;
s4: roaming and skipping among a plurality of fire scene images: the method adopts a three-dimensional fire investigation method, for a three-dimensional fire field with discontinuous middle, the investigation is generally started from the lower layer of an upper fire field, and for a continuous three-dimensional fire field, the investigation is started from the lowest layer;
s5: animation creation of real scene and virtual character in fire scene, surrounding environment and image measurement in fire scene: people around the fire scene are counted, and the positions and scene simulation is carried out on the survival, serious injury, light injury, death and unidentified people, so that the change of the positions of people and the change of the fire scene in the process from the fire occurrence to the evacuation are improved; meanwhile, the fire occurrence positions are classified and divided into a first level to a fifth level, and the areas utilize the building partitions in the subway building, so that the subsequent simulation of position change is facilitated; simultaneously surveying and mapping the areas with different grades in the field, and reserving a map, wherein the number is the number of the fire grades-the area name-the surveying and mapping time;
s6: three-dimensional reconstruction of a fire scene: carrying out reduction site and three-dimensional modeling by measuring drawing paper and a panoramic image drawing;
s7: and (3) fire process animation simulation: putting the three-dimensional modeling model into an animation simulation program, and changing simulation conditions such as wind direction, temperature, humidity and other factors to obtain a series of simulation animation results and a fire scene forming diagram;
s8: reporting a demonstration file at a fire scene: and summarizing the simulation animation result and the fire scene forming diagram, comparing the simulation animation result with different fire scenes which are numbered as fire levels, area names and mapping time, and obtaining a conclusion through comparison, so that the analysis and processing precision is improved.
As a further aspect of the present invention, the extraction in S3 includes the following parts: orientation and topography of the fire scene; obtaining evidence which can prove a fire site and a fire point; acquiring evidence capable of identifying an ignition source; acquiring evidence that a fire is identified; finding out the conditions of fire property loss and casualties; the effectiveness and other conditions of the fire-fighting equipment are checked.
As a further scheme of the invention, the determined reason in the roaming and jumping among the plurality of fire scene images in the S4 is caused artificially, and the line-following exploration can be carried out again.
As a further scheme of the invention, the three-dimensional reconstruction of the fire scene in the S6 is based on a mass model resource library, and the mass model resource library comprises common building components in subway buildings.
As a further scheme of the invention, the equipment used in the storage of the 360-degree panoramic image of the fire scene in the S2 comprises a precise fisheye lens, a high-end single lens reflex and a full-automatic shooting holder.
As a further aspect of the present invention, the fire process animation in S7 uses a simulation Unity3D engine.
The beneficial effects of the invention are as follows: the method utilizes a 360-degree panoramic image of a fire scene, animation creation of a real scene and a virtual character of the fire scene, animation measurement of the surrounding environment and the fire scene image measurement to establish a virtual building engineering three-dimensional model, utilizes a digital technology to provide a complete subway building live scene consistent with the actual situation for the model, compares the fire occurrence trend and the fire scene change in the building under different internal simulation environments, improves the simulation precision of the fire occurrence animation by comparing the existing fire scene, provides a fire occurrence reason and a fire scene forming diagram, can demonstrate and reference later fire early warning after summarizing, and supplements the fire analysis processing method in another mode.
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FIG. 1 is a process flow chart of a visualization analysis processing method for fire of a large public building according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a visualization analysis processing method for fire of a large public building is characterized by comprising the following steps:
s1: fire analysis needs to be carried out on subway buildings, and the following steps are required: the method comprises the steps of fire scene 360-degree panoramic image storage → fire scene material evidence reduction hotspot addition → roaming and jumping among a plurality of fire scene images → real scene and virtual character of the fire scene → animation creation of the surrounding environment → fire scene image measurement → three-dimensional reconstruction of the fire scene → animation simulation of the fire process → reporting demonstration file on the fire scene;
s2: and (3) storing a 360-degree panoramic image of a fire scene: through the functions of white balance, exposure compensation, HDR and the like in the professional camera, the fire scene image can be clearly and accurately recorded in an indoor environment with weak light;
s3: adding a fire scene material evidence reduction hotspot: a process of extracting trace material evidence which can prove the fire reason, and a system investigation work of making a fire conclusion through field analysis;
s4: roaming and skipping among a plurality of fire scene images: the method adopts a three-dimensional fire investigation method, for a three-dimensional fire field with discontinuous middle, the investigation is generally started from the lower layer of an upper fire field, and for a continuous three-dimensional fire field, the investigation is started from the lowest layer;
s5: animation creation and fire scene image measurement of real scene, virtual character and surrounding environment of fire scene: people around the fire scene are counted, and the positions and scene simulation is carried out on the survival, serious injury, light injury, death and unidentified people, so that the change of the positions of people and the change of the fire scene in the process from the fire occurrence to the evacuation are improved; meanwhile, the fire occurrence positions are classified and divided into a first level to a fifth level, and the areas utilize building partitions in subway buildings, so that the subsequent simulation of position change is facilitated; simultaneously surveying and mapping the areas with different grades in the field, and reserving a map, wherein the number is the number of the fire grades-the area name-the surveying and mapping time;
s6: three-dimensional reconstruction of a fire scene: carrying out reduction site and three-dimensional modeling by measuring drawing paper and a panoramic image drawing;
s7: and (3) fire process animation simulation: putting the three-dimensional modeling model into an animation simulation program, and changing simulation conditions such as wind direction, temperature, humidity and other factors to obtain a series of simulation animation results and a fire scene forming diagram;
s8: reporting a demonstration file at a fire scene: and summarizing the simulation animation result and the fire scene forming diagram, comparing the simulation animation result with different fire scenes which are numbered as fire levels, area names and mapping time, and obtaining a conclusion through comparison, so that the analysis and processing precision is improved.
The extraction work in S3 includes the following parts:
orientation and topography of the fire scene;
obtaining evidence which can prove a fire site and a fire point;
acquiring evidence capable of identifying an ignition source;
acquiring evidence that a fire is identified;
finding out the conditions of fire property loss and casualties;
the effectiveness and other conditions of the fire-fighting equipment are checked,
and S4, determining that the reason for roaming and jumping among the multiple fire scene images is caused artificially, and then performing exploration by a line-following method, wherein the three-dimensional reconstruction of the fire scene in S6 is based on a massive model resource library, the massive model resource library comprises common building parts in subway buildings, the equipment used for storing the 360-degree panoramic images of the fire scene in S2 is provided with a precise fisheye lens, a high-end single-lens reflex camera and a full-automatic shooting tripod head, and the fire process animation in S7 is realized by adopting a Unity3D engine.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A visual analysis and processing method for fire disasters of large public buildings is characterized by comprising the following steps:
s1: fire analysis needs to be carried out on subway buildings, and the following steps are required: the method comprises the steps of fire scene 360-degree panoramic image storage → fire scene material evidence reduction hotspot addition → roaming and jumping among a plurality of fire scene images → real scene and virtual character of the fire scene → animation creation of the surrounding environment → fire scene image measurement → three-dimensional reconstruction of the fire scene → animation simulation of the fire process → reporting demonstration file on the fire scene;
s2: and (3) storing a 360-degree panoramic image of a fire scene: through the functions of white balance, exposure compensation, HDR and the like in the professional camera, the fire scene image can be clearly and accurately recorded in an indoor environment with weak light;
s3: adding a fire scene material evidence reduction hotspot: a process of extracting trace material evidence which can prove the fire reason, and a system investigation work of making a fire conclusion through field analysis;
s4: roaming and skipping among a plurality of fire scene images: the method adopts a three-dimensional fire investigation method, for a three-dimensional fire field with discontinuous middle, the investigation is generally started from the lower layer of an upper fire field, and for a continuous three-dimensional fire field, the investigation is started from the lowest layer;
s5: animation creation and fire scene image measurement of real scene, virtual character and surrounding environment of fire scene: people around the fire scene are counted, and the positions and scene simulation is carried out on the survival, serious injury, light injury, death and unidentified people, so that the change of the positions of people and the change of the fire scene in the process from the fire occurrence to the evacuation are improved; meanwhile, the fire occurrence positions are classified and divided into a first level to a fifth level, and the areas utilize the building partitions in the subway building, so that the subsequent simulation of position change is facilitated; simultaneously surveying and mapping the areas with different grades in the field, and reserving a map, wherein the number is the number of the fire grades-the area name-the surveying and mapping time;
s6: three-dimensional reconstruction of a fire scene: carrying out reduction site and three-dimensional modeling by measuring drawing paper and a panoramic image drawing;
s7: and (3) fire process animation simulation: putting the three-dimensional modeling model into an animation simulation program, and changing simulation conditions such as wind direction, temperature, humidity and other factors to obtain a series of simulation animation results and a fire scene forming diagram;
s8: reporting a demonstration file at a fire scene: and summarizing the simulation animation result and the fire scene forming diagram, comparing the simulation animation result with different fire scenes which are numbered as fire levels, area names and mapping time, and obtaining a conclusion through comparison, so that the analysis and processing precision is improved.
2. The visualization analysis processing method for fire disaster in large-scale public buildings according to claim 1, wherein the extraction work in S3 comprises the following parts: orientation and topography of the fire scene; acquiring evidence capable of proving a fire site and a fire point; acquiring evidence capable of identifying an ignition source; acquiring evidence that a fire is identified; finding out the conditions of fire property loss and casualties; the effectiveness and other conditions of the fire-fighting equipment are checked.
3. The visualization analysis and processing method for fire disaster in large-scale public buildings according to claim 1, wherein the reason for determining the roaming and jumping among the plurality of fire scene images in S4 is artificial, and the line-by-line exploration can be performed again.
4. The visualization analysis processing method for the fire of the large public building according to claim 1, wherein the three-dimensional reconstruction of the fire scene in the step S6 is based on a massive model resource library, and the massive model resource library comprises common building components in subway buildings.
5. The visualization analysis processing method for fire disaster in large-scale public buildings according to claim 1, characterized in that the devices used for storing the 360 ° panoramic image of the fire scene in S2 are a precise fisheye lens, a high-end single lens reflex camera and a full-automatic shooting pan-tilt.
6. The visualization analysis processing method for fire in large public buildings according to claim 1, wherein the fire process animation in S7 adopts a simulation Unity3D engine.
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