Ground moving target indicator (GMTI) radar that converts radar tracks to directed graphs (DG), and creates weighted DGs aligned with superimposed with digital maps

摘要

The present invention is directed to a system that includes a semantic reasoning engine that is configured to convert radar track data into a directed graph representation (DGR) of the predetermined surveillance region and iteratively combine the DGRs to create a weighted directed graph (WDG) aligned and superimposed with the digital map data. The WDG includes first WDG elements corresponding to moving objects detected by a radar system. The WDG is compared to historical data to obtain a surveillance detection parameter. An alarm message is generated if the surveillance detection parameter deviates from the historical data by a predetermined amount. An output device is coupled to the semantic reasoning engine and is configured to provide a representation of the digital map data, the WDG and the at least one alarm message.

主权项

1. A system comprising:
at least one sensor input configured to provide radar track data, the radar track data being derived from one or more radar images, each radar image being obtained by a radar system during a radar imaging dwell of a predetermined surveillance region; at least one digital memory configured to store digital map data substantially corresponding to the predetermined surveillance region; a semantic reasoning engine coupled to the at least one sensor input and the at least one digital memory, the semantic reasoning engine being configured to convert the radar track data from each radar image into an directed graph representation (DGR) of the predetermined surveillance region and iteratively combine each succeeding DGR with preceding DGRs obtained during a predetermined time frame to create a weighted directed graph (WDG) aligned and superimposed with the digital map data, the WDG including first WDG elements corresponding to moving objects detected by the radar system during the radar imaging dwell, the semantic reasoning engine also being configured to compare the WDG to historical data to obtain at least one surveillance detection parameter, at least one alarm message being generated if the at least one surveillance detection parameter deviates from the historical data by a predetermined amount; and at least one output device coupled to the semantic reasoning engine, the at least one output device being configured to provide a representation of the digital map data, the WDG and the at least one alarm message.