Two applications of time reversal mirrors: Seismic radio and seismic radar
Type
ArticleKAUST Department
Center for Subsurface Imaging and Fluid ModelingEarth Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2011-10-03Online Publication Date
2011-10-03Print Publication Date
2011-10Permanent link to this record
http://hdl.handle.net/10754/552137
Metadata
Show full item recordAbstract
Two seismic applications of time reversal mirrors (TRMs) are introduced and tested with field experiments. The first one is sending, receiving, and decoding coded messages similar to a radio except seismic waves are used. The second one is, similar to radar surveillance, detecting and tracking a moving object(s) in a remote area, including the determination of the objects speed of movement. Both applications require the prior recording of calibrationGreen’s functions in the area of interest. This reference Green’s function will be used as a codebook to decrypt the coded message in the first application and as a moving sensor for the second application. Field tests show that seismicradar can detect the moving coordinates ( x(t), y(t), z(t)) of a person running through a calibration site. This information also allows for a calculation of his velocity as a function of location. Results with the seismic radio are successful in seismically detecting and decoding coded pulses produced by a hammer. Both seismic radio and radar are highly robust to signals in high noise environments due to the super-stacking property of TRMs.Citation
Two applications of time reversal mirrors: Seismic radio and seismic radar 2011, 130 (4):1985 The Journal of the Acoustical Society of AmericaPublisher
Acoustical Society of America (ASA)PubMed ID
21973353ae974a485f413a2113503eed53cd6c53
10.1121/1.3621469
Scopus Count
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