US Patent No. 9,103,908

SECURITY MONITORING SYSTEM USING BEAMFORMING ACOUSTIC IMAGING AND METHOD USING THE SAME


Patent No. 9,103,908
Issue Date August 11, 2015
Title Security Monitoring System Using Beamforming Acoustic Imaging And Method Using The Same
Inventorship Kang-Ho Park, Daejeon (KR)
Sung Q Lee, Daejeon (KR)
Woo Seok Yang, Daejeon (KR)
Jongdae Kim, Daejeon (KR)
Semyung Wang, Gwangju (KR)
Daesung Kim, Gwangju (KR)
Kihyun Kim, Gwangju (KR)
Assignee ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR) GWANGJ...

Claim of US Patent No. 9,103,908

1. A security monitoring system using beamforming acoustic imaging, the system comprising:
a primary detection device that initially detects a trespasser in a space;
an acoustic generating device that generates acoustic signals in response to the initial detection of the trespasser in the
space,

wherein the acoustic generating device generates the acoustic signals periodically for monitoring a position of the trespasser
after initial detection of the trespasser in the space;

a plurality of acoustic measuring devices that receive the acoustic signals; and
an acoustic image processing device that periodically generates acoustic images that include a distribution of the acoustic
signals by applying a beamforming algorithm to the acoustic signals received by the plurality of acoustic measuring devices
and determines the position of the trespasser in a space by comparing a reference acoustic image of the space generated before
the trespasser is detected and a generated acoustic image of the space generated after the trespasser is detected,

wherein the acoustic image processing device includes a fixed beamformer or an adaptive beamformer detecting the acoustic
signals in the plurality of acoustic measuring devices, dividing the detected acoustic signals into a specific frequency component
using fast fourier transform and performing angle division on a specific angle direction, thereby obtaining the distribution
of the acoustic signals.