The application belongs to the technical field of
nuclear power business data management, aims to solve the problem of device-level integration of cross-
modal data, and provides a multi-
source data multi-level association retrieval method and
system for DCS devices, the method receives and analyzes retrieval input, generates structured retrieval instructions, generates multi-level labels, realizes accurate matching and
semantic association analysis, schedules parallel retrieval of
time series databases, graph databases and full-text engines, fuses results through dynamic
weight distribution and time window alignment strategy, generates a composite retrieval report, displays topological relationships in a device association graph, and presents
time series curves, event markers and analysis reports in a multi-
modal view, and realizes penetrating analysis from process chain to
device parameters through real-time updating of content; the
system comprises a retrieval
service layer, an
association model layer and a
data source layer. The application realizes multi-
level data penetrating retrieval from the device
physical layer to the
process logic layer and then to the event context layer, and provides full-
link data tracing capability for industrial scenes.