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US 2022/0065977 A1Published application
City-scale acoustic impulse detection and localization
AssigneeNEC Laboratories America, Inc.
InventorsSarper OZHARAR, Yue TIAN, Shaobo HAN, Ting WANG, Yangmin DING
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Abstract
Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously enable city-scale acoustic impulse detection and localization using standard, live aerial telecommunications optical fiber cables through the use of distributed acoustic sensing exhibiting an error of less than 1.22 m.
Claims10
A city-scale acoustic impulse detection and localization method comprising:
- providing a distributed fiber optic sensing system (DFOS), said system including a length of optical fiber;
- and
- a DFOS interrogator and analyzer in optical communication with the length of optical fiber;
- said method comprising:
- operating the DFOS during the acoustic impulse event;
- determining, by the DFOS, that that acoustic impulse event occurred by detecting signals produced by mechanical vibrations induced in the optical fiber from the acoustic impulse event;
- performing a spatial and temporal analysis on the detected signals;
- generating a probability distribution of source location of the acoustic impulse event;
- and
- outputting one or more indicia of the generated probability distribution.
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Dependencies are inferred from the claim text.