ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,444,313, issued on Oct. 14, was assigned to TONGJI UNIVERSITY (Shanghai).

"Detection method and system for underground space by joint use of fixed sensor and UAV movement detection" was invented by Gang Li (Shanghai), Bin He (Shanghai) and Runjie Shen (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a detection method and system for an underground space by joint use of fixed sensors and unmanned aerial vehicle (UAV) movement detection. The detection system includes underground space sensor nodes and an underground space UAV. The underground space sensor nodes are configured to perform fixed monitoring based on a...