CN-121980884-A - Natural resource three-dimensional visual modeling method based on digital twin

CN121980884ACN 121980884 ACN121980884 ACN 121980884ACN-121980884-A

Abstract

The invention relates to the technical field of digital simulation, in particular to a three-dimensional visual modeling method of natural resources based on digital twinning, which comprises the steps of constructing a discrete calculation map according to a live-action three-dimensional model of a target area and geographic information system data, projecting a design bottom plate of a building information model to the discrete calculation map to determine design boundary nodes, carrying out constraint propagation calculation on the discrete calculation map by taking the design boundary nodes as propagation starting points, determining the accumulated compliance consumption and the accumulated horizontal projection distance of each node in the discrete calculation map, determining the topology type of the node according to the accumulated compliance consumption, the accumulated horizontal projection distance, the original terrain elevation and preset engineering slope releasing parameters of the node, and carrying out geometric reconstruction on the discrete calculation map according to the topology type of each node to generate a digital twinning model fusing the building information model and the live-action three-dimensional model. The invention synchronously realizes the automatic avoidance yielding of the slope model and the closed generation of the structure.

Inventors

LI ZICHUAN
LU DANHUAN
LIU JIAHUI
YAN XIAODONG
LIN YAN
YIN GUOQIANG
WANG QI
LI QUANXIU
SUN XIANGLONG
CAO ZHENGWEI
HE YING
Yu jiaolong
WANG KAI
WANG XIAOMENG

Assignees

浙江臻善科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260409

Claims (10)

1. A digital twinning-based natural resource three-dimensional visual modeling method, characterized in that the method comprises: For a target area to be subjected to earthwork deduction, constructing a discrete calculation map according to a live-action three-dimensional model of the target area and geographic information system data, wherein nodes in the discrete calculation map record original terrain elevation, and edges in the discrete calculation map are configured with passing resistance weights, and the passing resistance weights are used for representing compliance costs of crossing different types of surface areas; projecting a design base plate of a building information model to the discrete calculation map, determining a design boundary node and endowing the design boundary node with a design reference elevation corresponding to the design base plate, wherein the design boundary node is a node in a projection area of the design base plate; Taking the design boundary node as a propagation starting point, performing constraint propagation calculation on the discrete calculation map, and determining the accumulated compliance consumption and the accumulated horizontal projection distance of each node in the discrete calculation map; for each node in the discrete calculation map, determining a theoretical design elevation of the node according to the accumulated horizontal projection distance of the node and a preset engineering slope parameter; Determining the topology type of the node according to a first comparison result of the theoretical design elevation of the node and the original terrain elevation and a second comparison result of the accumulated compliance consumption of the node and a preset compliance consumption threshold; and geometrically reconstructing the discrete calculation map according to the topology type of each node to generate a digital twin model fusing the building information model and the live-action three-dimensional model.
2. The digital twinning-based natural resource three-dimensional visual modeling method according to claim 1, wherein constructing a discrete computation graph comprises: Discretizing the triangular mesh of the live-action three-dimensional model, extracting and de-duplicating the vertexes of all triangular patches to form a node set; Defining connection edges between nodes in the node set according to the edge connection relation of the triangular patches to form an edge set; and recording the elevation value of each node in the three-dimensional space as the original terrain elevation.
3. The digital twinning-based natural resource three-dimensional visual modeling method according to claim 1, wherein determining the passing resistance weight corresponding to each edge in the discrete computation map comprises: For each edge in the discrete computing map, determining a corresponding earth surface coverage class for the edge in the geographic information system data; obtaining a resistance coefficient corresponding to the earth surface covering category according to a preset resistance coefficient mapping relation reflecting engineering constraint intensity of different earth surface covering categories; and determining the passing resistance weight of the edge according to the three-dimensional geometric length of the edge and the resistance coefficient.
4. The digital twinning-based natural resource three-dimensional visual modeling method of claim 1, wherein performing constraint propagation calculations on the discrete computation atlas comprises: Initializing the cumulative compliance consumption and the cumulative horizontal projection distance of the design boundary nodes to be zero, initializing the cumulative compliance consumption and the cumulative horizontal projection distance of other nodes except the design boundary nodes in the discrete calculation map to be a preset maximum value, and recording self identification for each design boundary node as design attribution; establishing a minimum priority queue based on the accumulated compliance consumption of the nodes, and adding all the design boundary nodes into the minimum priority queue; And for each adjacent node of the current node, updating the accumulated compliance consumption and the accumulated horizontal projection distance of the adjacent node based on the passing resistance weight and the horizontal projection distance between the current node and the adjacent node, recording the design attribution of the current node as the design attribution of the adjacent node under the condition that the updating is successful, and adding the adjacent node or reordering in the minimum priority queue based on the updated accumulated compliance consumption of the adjacent node.
5. The digital twinning-based natural resource three-dimensional visual modeling method of claim 4, wherein updating the cumulative compliance consumption and cumulative horizontal projection distance of the adjacency node comprises: determining an attempted compliance consumption for the neighboring node based on the accumulated compliance consumption for the current node and the pass resistance weights for edges connecting the current node and the neighboring node; Determining an attempted horizontal projection distance of the adjacent node according to the accumulated horizontal projection distance of the current node and the two-dimensional Euclidean distance of the current node and the adjacent node on a horizontal projection plane; In the event that the attempted compliance consumption of the neighboring node is less than the current accumulated compliance consumption of the neighboring node, updating the accumulated compliance consumption of the neighboring node based on the attempted compliance consumption and updating the accumulated horizontal projection distance of the neighboring node based on the attempted horizontal projection distance.
6. The digital twinning-based natural resource three-dimensional visual modeling method according to claim 4, wherein determining a theoretical design elevation of the node according to the accumulated horizontal projection distance of the node and a preset engineering slope parameter comprises: Acquiring the design elevation associated with the node, wherein the design elevation associated with the node is the design reference elevation of the design boundary node corresponding to the design attribution recorded by the node; And determining the theoretical design elevation of the node according to the design elevation associated with the node, the accumulated horizontal projection distance of the node and the preset engineering slope setting parameter.
7. The digital twinning-based natural resource three-dimensional visual modeling method of claim 6, wherein determining the topology type of the node comprises: determining the filling type of the node according to the design elevation associated with the node and the original terrain elevation of the node; Determining the node as a landing node when the filling type is a filling type and the theoretical design elevation is greater than or equal to the original terrain elevation, and determining the node as the landing node and determining the topology type of the landing node as a first topology type when the filling type is a digging type and the theoretical design elevation is greater than or equal to the original terrain elevation; For a non-floor node, determining that the topology type of the node is a second topology type if the second comparison result is that the accumulated compliance consumption is less than or equal to the compliance consumption threshold; and determining that the topology type of the node is a third topology type if the second comparison result is that the accumulated compliance consumption is greater than the compliance consumption threshold.
8. The digital twinning-based natural resource three-dimensional visual modeling method according to claim 7, wherein geometrically reconstructing the discrete computation atlas according to the topology type of each node comprises: For a node with a topology type of a second topology type, updating the space elevation of the node according to the theoretical design elevation of the node; For nodes with the topology type of a third topology type, performing vertex splitting operation to generate vertexes representing the top of a design slope and vertexes representing the foundation of the soil retaining structure, adjusting vertex indexes of triangular patches connected with the original nodes to reconstruct connection relations, and constructing new triangular patches between new vertexes generated by adjacent nodes with the third topology type to form a materialized soil retaining structure surface; And for the nodes with the topology type of the first topology type, calculating normal vectors of all triangular patches associated with the nodes, and carrying out weighted average on the normal vectors to generate and endow the smoothed vertex normal vectors of the nodes.
9. The digital twinning-based natural resource three-dimensional visual modeling method of claim 8, wherein adjusting vertex indexes of triangular patches connected to original nodes to reconstruct connection relations comprises: For each triangular patch connected with the original node, obtaining topology types of other vertexes except the original node in the triangular patch; Modifying the vertex index pointing to the original node in the vertex indexes of the triangular surface patch to point to the vertex on the top of the representative design slope under the condition that the topology type of the other vertexes has the second topology type; And modifying the vertex index pointing to the original node in the vertex indexes of the triangular surface patches to point to the vertex representing the foundation of the retaining structure under the condition that the second topology type does not exist in the topology types of the other vertexes.
10. The three-dimensional visual modeling method of natural resources based on digital twinning according to claim 3, wherein a resistance coefficient mapping relation reflecting engineering constraint intensity of different earth surface coverage categories is preset, and the method is configured to be that for an area category marked as forbidden engineering encroachment in the geographic information system data, the corresponding resistance coefficient is a first value, and for an area category marked as allowed earthwork, the corresponding resistance coefficient is a second value, and the first value is larger than the second value.

Description

Natural resource three-dimensional visual modeling method based on digital twin Technical Field The invention relates to the technical field of digital simulation, in particular to a digital twinning-based natural resource three-dimensional visual modeling method. Background With the deep application of the digital twin technology in natural resource management and homeland space planning engineering, the requirements of the deduction and compliance examination of earthwork on heterogeneous model fusion are increasingly urgent, and effective combination of a building information model (Building Information Modeling, BIM) and a live-action three-dimensional model reflecting the current ground surface is required to be realized so as to support the accurate development of core links such as engineering design, earthwork quantity estimation and the like. In the prior art, a fusion multi-reliance traditional geometric calculation method of a heterogeneous model, such as Boolean operation or a grid smoothing algorithm based on space distance, aims at eliminating the intersection and conflict among the models from a geometric layer, tries to construct a three-dimensional model meeting engineering requirements, and meets the basic requirement of combining topography and design intention in the deduction process of an earthwork scheme. However, the coupling relation between the earth surface semantic constraint and the engineering physical constraint is not fully considered in the traditional method, so that the fused three-dimensional model often has the problems of insufficient compliance, unclosed structure, geometrical accuracy not conforming to engineering specifications and the like, and the compliance examination and accurate deduction of the actual engineering are difficult to reliably support. Disclosure of Invention In order to solve the technical problem that the existing heterogeneous model fusion method is poor in application effect in three-dimensional visual modeling of natural resources, the invention aims to provide a three-dimensional visual modeling method of natural resources based on digital twinning, and the adopted technical scheme is as follows: The first aspect provides a three-dimensional visual modeling method of natural resources based on digital twinning, which comprises the steps of constructing a discrete calculation map according to a real-scene three-dimensional model of a target area and geographic information system data for the target area to be deduced, wherein nodes in the discrete calculation map record original terrain elevation, edges in the discrete calculation map are configured with passing resistance weights, the passing resistance weights are used for representing compliance costs of traversing different types of surface areas, projecting a design base plate of a building information model to the discrete calculation map, determining design boundary nodes and giving the design boundary nodes with design reference elevation corresponding to the design base plate, wherein the design boundary nodes are nodes in a projection area of the design base plate, performing constraint propagation calculation on the discrete calculation map by taking the design boundary nodes as propagation starting points, determining accumulated compliance consumption and accumulated horizontal projection distance of each node in the discrete calculation map, wherein the accumulated compliance consumption is accumulated on the basis of passing resistance weights of all edges on a propagation path, the accumulated horizontal projection distance is accumulated on the basis of projection length of the propagation path on a horizontal plane, accumulating the accumulated compliance cost of each node in the discrete calculation, comparing the accumulated compliance consumption with the accumulated horizontal projection distance of each node with the first topology map according to the preset level projection parameter of the first topology map, determining the accumulated compliance consumption of each node in the first topology map and the first topology map than the first topology map by comparing the accumulated compliance consumption of each node with the first topology map, and generating a digital twin model fusing the building information model and the live-action three-dimensional model. In one possible design, a discrete calculation map is constructed, wherein the discrete calculation map comprises the steps of carrying out discretization on a triangular grid of the live-action three-dimensional model, extracting and de-duplicating vertexes of all triangular patches to form a node set, defining connecting edges among nodes in the node set according to edge connection relations of the triangular patches to form an edge set, and recording elevation values of each node in a three-dimensional space as the original terrain elevation. In a possible design, determining the passing resistance weight co