CN114356271A - Multi-dimensional disaster information multi-screen linkage visualization method for underground space - Google Patents
Multi-dimensional disaster information multi-screen linkage visualization method for underground space Download PDFInfo
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Abstract
The invention relates to the technical field of disaster prevention and reduction, in particular to a multi-screen linkage visualization method for multidimensional disaster situation information of underground space, which comprises indexing, organizing and managing disaster site data of underground space, scheduling disaster site data, constructing a three-dimensional scene and a two-dimensional scene, multi-screen linkage and interactive browsing and dynamic plotting of multidimensional information, synchronizing the two-dimensional scene and the three-dimensional scene in real time through coordinate transformation and an interactive event triggering mechanism, synchronizing a viewpoint, a visual field, zooming and LOD display, and mapping coordinates to enable geographic coordinates of two-dimensional space-time data to correspond to the spatial position of the three-dimensional scene through coordinate transformation. And the consistency of the displayed content and range of the two can be ensured, and a visual basis is provided for underground space intelligent service.
Description
Technical Field
The invention relates to the technical field of disaster prevention and reduction, in particular to a multi-dimensional disaster information multi-screen linkage visualization method for an underground space.
Background
The development of urban underground space is the main melody of the development of China and even the world at present, comprehensive utilization of underground space becomes the first-choice technical policy for relieving the bottleneck of urban development, and the urban underground space represented by subways, underground public buildings and the like relieves the relevant contradictions generated in the rapid development process of cities to a great extent.
The underground space is used as a closed space, once the underground space has a disaster, the disaster can be timely and effectively processed only by comprehensively and accurately judging the disaster, and no disaster visualization processing method which can consider the overall situation and can visually feel exists at present due to the particularity of the underground space.
Therefore, a multi-screen linkage visualization method for underground space multi-dimensional disaster information needs to be designed, advantages of two-dimensional and three-dimensional space-time data are taken into consideration, complex disaster information management and relevant space analysis can be performed by utilizing a mature two-dimensional space technology, a three-dimensional virtual reality technology and processing capacity of multi-source multi-scale data can be utilized, multi-screen linkage visualization of the underground space multi-dimensional information can achieve multi-screen linkage of two-dimensional and three-dimensional scenes, and in a disaster rescue process, various types of moving targets such as rescue equipment and rescue personnel need to be accessed to be matched with a two-dimensional and three-dimensional map, and real-time dynamic calibration and self-adaptive visualization are needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a multi-screen linkage visualization method for underground space multi-dimensional disaster information, takes the advantages of two-dimensional and three-dimensional space-time data into consideration, not only can the mature two-dimensional space technology be utilized to manage and analyze the complex disaster information, but also the three-dimensional virtual reality technology and the processing capacity of multi-source and multi-scale data can be utilized, the multi-screen linkage visualization of the underground space multi-dimensional information can realize the multi-screen linkage of two-dimensional and three-dimensional scenes, and a visualization basis is provided for the intelligent service of the underground space:
the method comprises the following steps:
s1: underground space disaster site data indexing, organizing and managing;
s2: scheduling underground space disaster field data;
s3: constructing a three-dimensional scene and a two-dimensional scene of an underground space;
s4: multi-dimensional information multi-screen linkage of an underground space;
s5: interactive browsing and dynamic plotting;
the three-dimensional scene construction comprises the following steps:
s30: constructing a multi-source disaster information space-time unified reference frame;
s31: reading various data in the field vision range of the disaster based on the space-time unified reference frame;
s32: acquiring field three-dimensional point cloud information according to the SLAM three-dimensional ground object scene sensing terminal;
s33: constructing a three-dimensional scene of an underground space disaster site, providing a visualization scheme of a three-dimensional dynamic scene of the underground space, and constructing a three-dimensional dynamic display mode, wherein the three-dimensional scene is in a spherical projection form;
s1 and S2 specifically are: the comprehensive situation data of the underground space disaster site is read, organization and management mechanisms of various data are analyzed, a dynamic positioning database is established for the mobile object, and efficient space-time integrated distributed storage and composite index of the mobile object space-time data are established, so that efficient scheduling of the disaster site data is realized.
The two-dimensional scene construction comprises the following steps: adopting a system framework with the same three-dimensional scene in the steps S30-S32, scheduling and displaying two-dimensional scenes of different levels according to needs, wherein the two-dimensional scenes are in a plan view form;
the three-dimensional scene and the two-dimensional scene are synchronized in real time through a coordinate transformation and interaction event triggering mechanism;
the coordinate transformation makes the geographic coordinate of the two-dimensional space-time data correspond to the spatial position of the three-dimensional scene through coordinate mapping;
the real-time synchronization comprises viewpoint synchronization, visual field synchronization, zooming synchronization and LOD display synchronization;
the multi-dimensional information multi-screen linkage calculates the position information of the current view in real time by monitoring the interaction event of the view and combining a coordinate dynamic linkage algorithm, and forwards the position information to another view through a message queue, and the corresponding view updates the view position according to the received message, so that the synchronization of the display range of the two-dimensional and three-dimensional view windows is realized;
the coordinate dynamic linkage algorithm comprises a three-dimensional scene positioning two-dimensional plane view and a two-dimensional plane map positioning three-dimensional scene.
The three-dimensional scene positioning two-dimensional plane view is a two-dimensional plane map positioned through a three-dimensional scene, namely the position of a center point of the two-dimensional scene and the map display range are calculated through attitude information such as the viewpoint position, the angle, the height and the like of the three-dimensional scene.
The positioning of the three-dimensional plane map through the two-dimensional scene is to calculate the viewpoint position and the attitude parameter of the three-dimensional scene through the central point position and the map display range of the two-dimensional plane map.
The multidimensional information multi-screen linkage takes a defined communication interface as a bridge for communication between a system main frame and each sub-function module, each function module is taken as a plug-in, a defined communication protocol is followed, a WebGL-based map engine is adopted, and bottom codes are realized by HTML and JavaScript.
The sub-function module comprises a two-dimensional visualization system and a three-dimensional visualization system.
The two-dimensional visualization function module adopts an open-source leaf.
Two-dimensional and three-dimensional disaster information is presented in a multi-screen manner.
The disaster site data also includes temperature, humidity, air pressure, and gas type.
Compared with the prior art, the two-dimensional visualization and three-dimensional visualization platform established by the multi-screen linkage mechanism has the consistency on data content and service content, through a two-three dimensional coordinate conversion linkage algorithm, the geographic coordinate, the viewpoint angle and the height can be transmitted to the three-dimensional view through the message transmission module when the two-dimensional view is operated, the three-dimensional view updates the space coordinate of the view angle in real time according to the received message, the three-dimensional information can also be transmitted to the two-dimensional view through the message transmission module when the three-dimensional view is operated, instructions can be sent to operate in the two-dimensional view and the three-dimensional view, and the consistency of the displayed contents and ranges of the two-dimensional view and the three-dimensional view can be ensured, namely two-dimensional and two-dimensional, two-dimensional and three-dimensional are all shared by position information to realize real-time multi-screen visualization, and a visualization basis is provided for intelligent service of underground space.
Drawings
FIG. 1 is a schematic diagram of a multi-screen linkage visualization technology route for underground space multi-dimensional information.
FIG. 2 is a schematic diagram of a two-dimensional and three-dimensional coordinate dynamic linkage algorithm of the present invention.
FIG. 3 is a schematic diagram illustrating a two-dimensional and three-dimensional multi-screen linkage principle of the present invention.
FIG. 4 is a schematic diagram of the overall structure and function structure of the two-dimensional and three-dimensional multi-screen linkage system of the present invention.
FIG. 5 is a schematic diagram of a two-dimensional and three-dimensional multi-screen linkage effect according to the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Referring to fig. 1-5, the invention provides a multi-dimensional disaster information multi-screen linkage visualization method for underground space:
the method comprises the following steps:
s1: underground space disaster site data indexing, organizing and managing;
s2: scheduling underground space disaster field data;
s3: constructing a three-dimensional scene and a two-dimensional scene of an underground space;
s4: multi-dimensional information multi-screen linkage of an underground space;
s5: interactive browsing and dynamic plotting;
the three-dimensional scene construction comprises the following steps:
s30: constructing a multi-source disaster information space-time unified reference frame;
s31: reading various data in the field vision range of the disaster based on the space-time unified reference frame;
s32: acquiring field three-dimensional point cloud information according to the SLAM three-dimensional ground object scene sensing terminal; (ii) a
S33: constructing a three-dimensional scene of an underground space disaster site, providing a visualization scheme of a three-dimensional dynamic scene of the underground space, and constructing a three-dimensional dynamic display mode, wherein the three-dimensional scene is in a spherical projection form;
s1 and S2 specifically are: the comprehensive situation data of the underground space disaster site is read, organization and management mechanisms of various data are analyzed, a dynamic positioning database is established for the mobile object, and efficient space-time integrated distributed storage and composite index of the mobile object space-time data are established, so that efficient scheduling of the disaster site data is realized.
The two-dimensional scene construction comprises the following steps: adopting a system framework with the same three-dimensional scene in the steps S30-S32, scheduling and displaying two-dimensional scenes of different levels according to needs, wherein the two-dimensional scenes are in a plan view form;
the three-dimensional scene and the two-dimensional scene are synchronized in real time through a coordinate transformation and interaction event triggering mechanism;
the coordinate transformation makes the geographic coordinate of the two-dimensional space-time data correspond to the spatial position of the three-dimensional scene through coordinate mapping;
the real-time synchronization comprises viewpoint synchronization, visual field synchronization, zooming synchronization and LOD display synchronization;
the multi-dimensional information multi-screen linkage calculates the position information of the current view in real time by monitoring the interaction event of the view and combining a coordinate dynamic linkage algorithm, and forwards the position information to another view through a message queue, and the corresponding view updates the view position according to the received message, so that the synchronization of the display range of the two-dimensional and three-dimensional view windows is realized;
the coordinate dynamic linkage algorithm comprises a three-dimensional scene positioning two-dimensional plane view and a two-dimensional plane map positioning three-dimensional scene.
The three-dimensional scene positioning two-dimensional plane view is a two-dimensional plane map positioned through a three-dimensional scene, namely the position of a center point of the two-dimensional scene and the map display range are calculated through attitude information such as the viewpoint position, the angle, the height and the like of the three-dimensional scene.
The positioning of the three-dimensional plane map through the two-dimensional scene is to calculate the viewpoint position and the attitude parameter of the three-dimensional scene through the central point position and the map display range of the two-dimensional plane map.
The multidimensional information multi-screen linkage takes a defined communication interface as a bridge for communication between a system main frame and each sub-function module, each function module is taken as a plug-in, a defined communication protocol is followed, a WebGL-based map engine is adopted, and bottom codes are realized by HTML and JavaScript.
The sub-function module comprises a two-dimensional visualization system and a three-dimensional visualization system.
The two-dimensional visualization function module adopts an open-source leaf.
Two-dimensional and three-dimensional disaster information is presented in a multi-screen manner.
The disaster site data also includes temperature, humidity, air pressure, and gas type.
Example (as shown in figure 1):
(1) underground space disaster site data access
The method comprises the steps of reading comprehensive situation data of a disaster site in an underground space, analyzing organization and management mechanisms of various data, constructing a dynamic positioning database aiming at a mobile object, establishing efficient time-space integrated distributed storage and composite index of time-space data of the mobile object, and realizing efficient scheduling of the disaster site data, wherein the underground space can be underground spaces such as an underground garage, an underground mine site, an underground building, a subway tunnel and the like, and the comprehensive data of the disaster site to be read comprises various information such as temperature, humidity, air pressure, gas type and the like of the site.
(2) Construction of three-dimensional scene of underground space
By constructing a multi-source disaster information space-time unified reference frame, the multi-feature normalized expression of the space-time reference, the expression mode and the scale precision of the multi-source disaster information is realized. Reading various data in the field vision range of the disaster based on a unified space-time data frame, acquiring field three-dimensional point cloud information according to an SLAM three-dimensional ground feature scene perception terminal, constructing a three-dimensional scene of an underground space disaster field, providing a visualization scheme of an underground space three-dimensional dynamic scene, and constructing a three-dimensional dynamic display mode.
(3) Two-dimensional scene construction of underground space
The two-dimensional and three-dimensional multi-screen linkage realization is based on the fact that two-dimensional scenes and three-dimensional scenes need viewpoint view field synchronization and LOD scaling synchronization, so that the two-dimensional scenes cannot be simply used as scenes of the same hierarchy, and the two-dimensional scenes of different hierarchies are scheduled and displayed according to needs. The method adopts a system framework the same as that of a three-dimensional scene, and is different in that the three-dimensional scene needs to be subjected to spherical projection in a spherical three-dimensional form, and a two-dimensional scene adopts a plane graph form.
(4) Multi-screen linkage display for multidimensional information of underground space
The geographic coordinates of the two-dimensional space-time data correspond to the spatial position of the three-dimensional scene through coordinate mapping, and the synchronization is kept through an interactive event triggering mechanism. Under the support of approaches such as viewpoint vision field synchronization, LOD synchronization and the like, the multi-dimensional information multi-screen linkage also has an interactive browsing function so as to realize real-time dynamic tracking of disaster scene perception data under the condition of a three-dimensional scene.
The multi-dimensional information multi-screen linkage visualization of the underground space mainly refers to two-dimensional and three-dimensional visualization of the underground space. The three-dimensional scene display adopts a computer graphics technology, and projects a three-dimensional space on a screen according to a visual principle, so that the three-dimensional scene display has the characteristics of space sense, distance sense, perspective characteristics of large and small sizes and the like, and the effect similar to human eye vision is simulated. The two-dimensional map projects the earth surface to a plane according to a certain mathematical and comprehensive rule, and expresses the geographic distribution, combination and related two-dimensional plane model of the object by using symbols. However, map projection may generate a certain degree of deformation, for a region within a certain range, because it uses a strict mathematical model, it may perform various mathematical transformations and operations, such as measuring distance, statistical data, spatial analysis relationship, etc., and two-dimensional and three-dimensional information is presented in a multi-screen manner, i.e. two-dimensional one screen, three-dimensional one screen, and two-dimensional and three-dimensional position information is visualized by sharing real-time multiple screens.
As shown in fig. 3, the principle of two-dimensional and three-dimensional multi-screen linkage visualization is realized by a message mutual response mechanism, the position information of the current view is calculated in real time by monitoring the interaction event of the view and combining with a coordinate dynamic linkage algorithm and is forwarded to another view through a message queue, and the corresponding view updates the view position according to the received message, so as to realize the synchronization of the window display range of the two-dimensional and three-dimensional views.
The standard dynamic linkage algorithm comprises two parts:
(1) three-dimensional scene positioning two-dimensional plane view (as shown in figure 2)
The positioning of the two-dimensional plane map through the three-dimensional scene is to calculate the position of the center point of the two-dimensional scene and the display range of the map through the attitude information such as the viewpoint position, the angle, the height and the like of the three-dimensional scene. As shown in the figure, the method is an algorithm schematic diagram, P is a plane map viewpoint, M is a plane map central point, ABEF is a plane map visual area, and the PM is always vertical to an ABEF plane according to the characteristics of a two-dimensional GIS; o is a three-dimensional scene viewpoint, OM is a sight line direction, FOV is a viewpoint visual range angle, OC and OD are a sight line upper boundary and a sight line lower boundary, and pitch is an included angle between the sight line and the horizontal direction. The problem is converted into the coordinate and sight of a viewpoint O in a known three-dimensional scene
Vector, finding the (x, y) coordinates of point P and vector
Length of (d). Wherein the vector
The length of (a) is related to the display scale of a two-dimensional plane map system, different two-dimensional systems have different view point height-to-range ratios, and only the length of (a) is requiredSolution vector
Length, obtaining a vector by a coefficient delta
Length, which is determined by the particular two-dimensional GIS system used.
P point plane coordinates of
(2) Two-dimensional plane map positioning three-dimensional scene
The positioning of the three-dimensional plane map through the two-dimensional scene is to calculate the viewpoint position and the attitude parameter of the three-dimensional scene through the central point position and the map display range of the two-dimensional plane map, according to the agreed rule, the depression elevation angle pitch and the view angle range FOV are fixed values, the problem is converted into the coordinate of the viewpoint P and the viewpoint height PM of the known two-dimensional plane map, and the (x, y, z) space coordinate of the viewpoint O in the three-dimensional scene is solved.
0 point coordinate is
As shown in fig. 4, the system uses a defined communication interface as a bridge for communication between the system main frame and each sub-function module, each function module is used as a plug-in, and follows a defined communication protocol, the function modules mainly relate to two-dimensional visualization and three-dimensional visualization, wherein the two-dimensional visualization system uses open-source leaf let. FIG. 4 is a general architecture and functional structure of two-dimensional and three-dimensional multi-screen linkage.
The two-dimensional visualization platform and the three-dimensional visualization platform established through the multi-screen linkage mechanism have consistency on data content and service content, the geographic coordinates, the viewpoint angle and the height can be transmitted to the three-dimensional view through the message transmission module when the two-dimensional view is operated through a two-three-dimensional coordinate conversion linkage algorithm, and the three-dimensional view updates the space coordinates of the view angle in real time according to the received message. The instructions can be sent out in the two-dimensional view and the three-dimensional view to carry out operation easily, and the consistency of the displayed content and range of the two views can be ensured.
The embodiments of the present invention have been described above, but the scope of the present invention is not limited to the above, and the present invention can be implemented by a user by making various modifications within a range not departing from the gist of the present invention, but the present invention is included in the scope of protection of the present patent.
The invention integrally solves the problem that the prior art cannot provide a comprehensive and visual visualization mode for the disaster condition of the underground space, and ensures that various types of moving targets such as rescue equipment, rescuers and the like can be accessed and matched with two three-dimensional maps, real-time dynamic calibration and self-adaptive visualization in the disaster rescue process through a two-three-dimensional multi-screen linkage mode, and the two-three-dimensional multi-screen linkage visualization of the underground space is the premise of realizing the management of the moving targets such as the rescue equipment, the rescuers and the like and a large amount of emergency equipment, and the self-adaptive visualization and dynamic calibration and tracking of the rescuers in the underground space, and also provides a visualization basis for intelligent service of the underground space.
Claims (9)
1. A multi-screen linkage visualization method for underground space multi-dimensional disaster information comprises the following steps:
s1: underground space disaster site data indexing, organizing and managing;
s2: scheduling underground space disaster field data;
s3: constructing a three-dimensional scene and a two-dimensional scene of an underground space;
s4: multi-dimensional information multi-screen linkage of an underground space;
s5: interactive browsing and dynamic plotting;
the three-dimensional scene construction comprises the following steps:
s30: constructing a multi-source disaster information space-time unified reference frame;
s31: reading various data in the field vision range of the disaster based on the space-time unified reference frame;
s32: acquiring field three-dimensional point cloud information according to the SLAM three-dimensional ground object scene sensing terminal;
s33: constructing a three-dimensional scene of an underground space disaster site, providing a visualization scheme of a three-dimensional dynamic scene of the underground space, and constructing a three-dimensional dynamic display mode, wherein the three-dimensional scene is in a spherical projection form;
the S1 and S2 are specifically as follows: reading comprehensive situation data of an underground space disaster site, analyzing organization and management mechanisms of various data, constructing a dynamic positioning database aiming at a mobile object, and establishing efficient time-space integrated distributed storage and composite index of the time-space data of the mobile object to realize efficient scheduling of the disaster site data;
the two-dimensional scene construction comprises: scheduling and displaying two-dimensional scenes of different levels according to needs by adopting the system framework with the same three-dimensional scenes in the steps S30-S32, wherein the two-dimensional scenes are in a plan view form;
the three-dimensional scene and the two-dimensional scene are synchronized in real time through a coordinate transformation and interaction event triggering mechanism; the coordinate transformation enables the geographic coordinates of the two-dimensional space-time data to correspond to the spatial position of the three-dimensional scene through coordinate mapping;
the real-time synchronization comprises viewpoint synchronization, visual field synchronization, zooming synchronization and LOD display synchronization; the multi-dimensional information multi-screen linkage calculates the position information of the current view in real time by monitoring the interaction event of the view and combining a coordinate dynamic linkage algorithm, and forwards the position information to the other view through a message queue, and the corresponding view updates the view position according to the received message, so that the synchronization of the display range of the two-dimensional and three-dimensional view windows is realized.
2. The method for multi-screen linkage visualization of the underground space multi-dimensional disaster information according to claim 1, wherein the coordinate dynamic linkage algorithm comprises three-dimensional scene positioning two-dimensional plane view and two-dimensional plane map positioning three-dimensional scene.
3. The underground space multi-dimensional disaster information multi-screen linkage visualization method according to claim 2, wherein the three-dimensional scene positioning two-dimensional plane view is a two-dimensional plane map through three-dimensional scene positioning, namely, the position of a two-dimensional scene center point and the map display range are calculated through attitude information such as viewpoint position, angle and height of the three-dimensional scene.
4. The underground space multi-dimensional disaster information multi-screen linkage visualization method according to claim 2, wherein the positioning of the three-dimensional plane map through the two-dimensional scene is to calculate a viewpoint position and an attitude parameter of the three-dimensional scene through a central point position and a map display range of the two-dimensional plane map.
5. The underground space multi-dimensional disaster information multi-screen linkage visualization method according to claim 1, wherein the multi-dimensional information multi-screen linkage takes a defined communication interface as a bridge for communication between a system main frame and each sub-function module, each function module is taken as a plug-in, follows a defined communication protocol, and is based on a WebGL map engine, and bottom codes are realized by HTML and JavaScript.
6. The method for multi-dimensional disaster information and multi-screen linkage visualization in underground space according to claim 5, wherein the sub-functional modules comprise a two-dimensional visualization system and a three-dimensional visualization system.
7. The method according to claim 6, wherein the two-dimensional visualization function module is an open-source leaf.
8. The method for multi-screen linkage visualization of underground space multi-dimensional disaster information according to claim 1, wherein the two-dimensional and three-dimensional disaster information is presented in a multi-screen manner.
9. The method according to claim 1, wherein the disaster site data further comprises temperature, humidity, air pressure and gas types.
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