ALEXANDRIA, Va., July 3 -- United States Patent no. 12,347,311, issued on July 1, was assigned to NEC Corp. (Tokyo).
"Road monitoring system, road monitoring device, and road monitoring method" was invented by Yuma Matsuda (Tokyo) and Tomoyuki Hino (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "To improve the accuracy of vehicle speed calculation, the present disclosure extracts, on the basis of an optical signal received from an optical fiber cable laid in a road, a first pattern according to the traveling state of a vehicle on the road in a first time range and a first distance range, generates, on the basis of the first pattern, a second pattern in which the number of time points included in the fi...