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CN-121998094-A - Digital railway network multisource topology data comparison method

CN121998094ACN 121998094 ACN121998094 ACN 121998094ACN-121998094-A

Abstract

The invention discloses a comparison method of digital railway network multisource topology data, which comprises the steps of S1, constructing a railway operation topology network based on train operation data and used for forming a time sequence topology reference reflecting the actual use state of the railway network, S2, constructing a railway physical topology network based on infrastructure related data and used for describing railway lines, stations and engineering connection relations thereof, and S3, executing topology comparison and consistency analysis between the railway operation topology network and the railway physical topology network to form a topology checking result. According to the invention, the special linear space-time continuity constraint of the railway road network is introduced, the railway operation topology is constructed as a space-time reference, and the space-time reference is gradually compared and inferred with the physical topology data with heterogeneous sources, so that the automatic consistency analysis and check between the multi-source topology data are realized, and the problem that the engineering requirements of large-scale and continuous update are difficult to meet due to the fact that the manual check is only relied on item by item is solved.

Inventors

  • LIU XINYU
  • MA ZHIYUAN
  • DONG ZHIJIE
  • WANG RAN
  • QI CHUNYU
  • JIANG XIANGUO
  • YANG XUKUN
  • FU MENG
  • XU SHENGBO
  • YANG JIACHEN
  • CHANG MINGYUAN

Assignees

  • 中国国家铁路集团有限公司
  • 中国铁路设计集团有限公司

Dates

Publication Date
20260508
Application Date
20260128

Claims (10)

  1. 1. A comparison method of digital railway network multisource topology data is characterized by comprising the following steps: s1, constructing a railway operation topology network based on train operation data, and forming a time sequence topology reference reflecting the actual use state of the railway network; s2, constructing a railway physical topology network based on infrastructure data, wherein the railway physical topology network is used for describing railway lines, stations and engineering connection relations of the railway lines and stations; And S3, performing topology comparison and consistency analysis between the railway operation topology network and the railway physical topology network to form a topology checking result.
  2. 2. The method for comparing the multi-source topology data of the digital railway network of claim 1, wherein the method for constructing the railway operation topology network comprises the following steps: s11, acquiring railway train operation data, wherein the railway train operation data is divided according to road bureaus and stored in a log form according to rows, and comprises train codes, station/line names, station/line codes and arrival/departure information; S12, preprocessing railway train operation data; S13, constructing a station node set; S14, constructing a train running path; s15, constructing a directed connection relation in an operation topology according to a front-back sequence relation in a train operation path; and S16, aggregating a plurality of logic sections with the same start and stop stations and consistent running directions to form stable running section nodes.
  3. 3. The method for comparing the multi-source topology data of the digital railway network according to claim 2, wherein the step S12 comprises the following steps: s121, reading track data, removing records of invalid or missing key information, and converting station data into interval representation; s122, grouping the data according to train codes, and carrying out ascending sort according to station serial numbers in each train group to ensure that a correct running track set is formed.
  4. 4. The method for comparing multisource topology data of a digital railway network according to claim 2, wherein constructing a set of station nodes comprises traversing all track records to extract unique station codes and station names, creating a graph node for each unique station and adding the graph node into the set.
  5. 5. The method for comparing the multi-source topology data of the digital railway network according to claim 2, wherein the step S15 comprises the following steps: S151, constructing a logic subinterval topology; s152, constructing a logic interval topology.
  6. 6. The method for comparing the multi-source topology data of the digital railway network of claim 5, wherein the method for constructing the logical subinterval topology comprises the following steps: s1511 traversing the train path for each train Ordered sequence of stations of (a) Iterating to generate a train operation interval Establishing a connection And Logic subintervals of (a) And put into A collection; S1511 according to the train running direction Build-up in the figure Is provided, wherein, Indicating the start site of the station, Representing a terminating site.
  7. 7. The method for comparing the multi-source topology data of the digital railway network of claim 5, wherein the method for constructing the logical interval topology comprises the following steps: S1521 traversing the logical subinterval set generated in S1511 Press start-stop station Grouping and aggregating the sub-intervals to form an interval; s1522 construction Is to establish logical intervals at the same time All sites contained therein Thereby forming a complete road network topology.
  8. 8. The method for comparing the multi-source topology data of the digital railway network of claim 1, wherein the method for constructing the physical topology network of the railway comprises the following steps: S21, loading data from a planning and design system, an infrastructure ledger system or public geographic information; S22, analyzing the node elements and the connection elements in the data in the S21, extracting basic attribute information of the node elements and the connection elements, unifying attribute field structures of the nodes and the connection in different data sources, and eliminating elements with obviously irrelevant or missing key attributes; S23, constructing a railway micro-physical topological network based on node elements and connection relations thereof; S24, carrying out hierarchical aggregation on the railway micro-physical topological network to construct a railway mesophysical topological network suitable for operation topological comparison.
  9. 9. The method for comparing the multi-source topology data of the digital railway network of claim 8, wherein S24 comprises: S241, in the same station range, carrying out aggregation treatment on a plurality of micro nodes with the same engineering attribute or belonging to the same functional unit, and merging the micro nodes into a physical station node; s242, merging continuous nodes in the same engineering interval in the same direction to form a physical topology unit of an expression interval structure; And S243, reserving a mapping relation between nodes before and after aggregation in the aggregation process so as to support subsequent retrospective topology to microstructure.
  10. 10. The method for comparing multisource topology data of a digital railway network according to claim 1, wherein S3 comprises: s31, identifying high-confidence anchor nodes in the whole network range, wherein the anchor nodes serve as initial constraints of a comparison process; S32, taking anchor point nodes as starting points, executing topology diffusion search in the running topology network according to the train running sequence, and synchronously searching candidate nodes in a preset neighborhood range in the physical topology network to form directional path matching; S33, in the topology diffusion process, carrying out multistage confidence judgment on the corresponding relation between the operation topology node and the physical topology node; S34, after completing one round of topology diffusion, automatically selecting a new anchor point from the confirmed high-confidence matching nodes, repeatedly executing S31-S33, enabling a comparison result to gradually cover a larger range of network intervals, and gradually converging the corresponding relation between the operation topology and the physical topology through multiple rounds of iteration; And S305, performing auxiliary analysis on the nodes which cannot be automatically determined by adopting a force-guiding layout or manual rechecking mode to form a topology checking result.

Description

Digital railway network multisource topology data comparison method Technical Field The invention relates to the technical field of railway informatization and traffic information processing, in particular to a comparison method of digital railway network multisource topology data. Background With the continuous advancement of digital railway and intelligent railway construction, railway road network topology data has become a fundamental data resource for supporting line planning, transportation organization, simulation analysis, capability assessment and digital twin modeling. However, compared with road traffic, an electric power network or a communication network, the railway road network has the structural characteristics of high specialization and strong constraint, and the topological form of the railway road network is simultaneously restricted by multiple factors such as engineering construction structures, transport organization logics, train operation rules and the like, so that the railway road network data is determined to have obvious specificity in expression mode, granularity level and evolution mechanism. From the prior art, the multi-source topology data construction and comparison method is mainly mature in the traffic fields of highways, aviation, water transportation and the like. Related methods are typically based on high-precision maps, remote sensing images, or continuous GPS tracks, with topological element matching achieved by spatial proximity, field consistency, or geometric similarity. Such methods generally imply the preconditions of homologous or near-homologous data sources, high consistency of semantic definition of nodes and edges, and reliable high-precision spatial referencing. However, the foregoing preconditions are often difficult to satisfy simultaneously in a multi-source data environment of a railway, so that the prior art is difficult to be directly applicable to comparison and verification between a railway operation topology and a physical topology. Inside the railway industry, maintenance and update of existing road network topology data still highly depend on manual reporting and manual auditing. On one hand, the method has the advantages of heavy workload, long period and poor real-time performance, and on the other hand, once hysteresis occurs in the reporting, auditing or convergence links, topology information distortion or dyssynchrony is easily formed on the national level, thereby influencing the reliability of capacity analysis, transportation organization optimization and auxiliary decision making. In addition, different service systems are oriented to different application scenes, and obvious differences exist on the recording mode and focus of the road network, so that the multi-source data are obvious in difference in scale, structure and expression form, a unified topology alignment mechanism is lacking, only manual item-by-item check is relied on, and the engineering requirements of large-scale and continuous update are difficult to meet. In an actual railway informatization system, railway road network topology data are mainly scattered and derived from the following systems (1) a planning design and engineering construction system is formed, a physical structure topology taking a line, a station yard and a section as cores is formed, data updating has obvious stages and hysteresis, the section or the left line of the station yard is often used as a main record object on a macroscopic scale, (2) operation data formed by a transportation organization and scheduling system are recorded by taking a train as cores, the arrival time, the operation sequence and the passing relation of the train between different stations are recorded, the actual use state of the railway network is reflected, and the operation logic of the mesoscopic scale is more embodied, (3) the existing railway geographic information or the station account system is used for maintaining the station position and the line information in a static mode, and part of the data lack of complete line geometric description, wherein professional systems such as signals and scheduling are focused on microscopic scale equipment or track circuit information. For a long time, the data are maintained by different railway offices and different service lines respectively, and a unified topology comparison and check mechanism is lacked, so that a unified topology network which truly reflects the running state of the railway is difficult to form in time on a national scale. Therefore, a technical scheme capable of effectively comparing and checking railway multisource topology data under the conditions of incomplete space information and inconsistent semantics is needed. Disclosure of Invention Aiming at the problems in the prior art, the invention discloses a comparison method of digital railway road network multisource topology data, the invention constructs railway operation topology as space-time