scholarly journals Field test and fading measurement of a distributed acoustic sensor system over a 50 km-long fiber

2018 ◽  
Author(s):  
Faruk Uyar ◽  
Ibrahim T. Ozdur ◽  
Ekmel Ozbay ◽  
Tolga Kartaloglu
Keyword(s):  
Field Test ◽  
Sensor System ◽  
Acoustic Sensor

Application of a Winch-type Towed Acoustic Sensor to a Wave-powered Unmanned Surface Vehicle

2016 ◽  
Vol 67 (1) ◽  
pp. 125 ◽  
Author(s):  
Taejun Moh ◽  
Namdo Jang ◽  
Seok Jang ◽  
Jin Hyung Cho
Keyword(s):  
Sensor System ◽  
Surveillance Systems ◽  
Acoustic Sensor ◽  
Surveillance Network ◽  
Unmanned Surface Vehicle ◽  
Sea Trial ◽  
Ocean Science ◽  
Acoustic Surveillance ◽  
High Resolution Images ◽  
Future Work

Although many countries have focused on anti-submarine warfare for several decades, underwater submarines can hardly be detected by current assets such as patrol aircraft, surface ships and fixed underwater surveillance systems. Due to the difficult conditions of the oceanic environment and the relative quietness of submarines, existing acoustic surveillance platforms are not able to fully cover their mission areas. To fill in the gaps, a winch-type towed acoustic sensor system was developed and integrated into a wave-powered unmanned surface vehicle by the Korea Institute of Ocean Science and Technology. In June 2015, sea trial tests were conducted to verify maneuvering, acoustic signal detection, and communication capabilities. During the maneuvering test, the wave-powered glider successfully moved along programmed waypoints. Despite towing the acoustic sensor system, only 20% of initial electricity was consumed in 20 days. The acoustic sensor was lowered to depths of 100–150 m by the winch system, and received signals from an acoustic simulator lowered to depths of 50–100 m by RV Jangmok. Simulated submarine noises that were refracted downward could be clearly received and classified by the hydrophone system, from distances of 2–8 km, while it was being towed silently and deeply. In addition, an optical camera provided high-resolution images of surface vessels, allowing integration with acoustic detection of underwater objects. In conclusion, this new platform using a deeply towed hydrophone system is worthy of consideration as an underwater surveillance asset. Future work is required to strengthen inter-asset communication and obstacle avoidance, and to overcome strong currents to make this technology a reliable part of the underwater surveillance network.

Detecting pink bollworm in cotton bolls using a multiple acoustic sensor system

1994 ◽  
Vol 95 (5) ◽  
pp. 2882-2882 ◽  
Author(s):  
Robert Hickling ◽  
Peter Lee ◽  
Wei Wei ◽  
Michelle Walters Geyer ◽  
David Pierce ◽  
...  
Keyword(s):  
Pink Bollworm ◽  
Sensor System ◽  
Acoustic Sensor ◽  
Cotton Bolls

Acoustic Sensor System to Detect Bacteria in an Aquatic Environment

2020 ◽  
Vol 56 (5) ◽  
pp. 604-609
Author(s):  
O. I. Guliy ◽  
B. D. Zaitsev ◽  
O. A. Karavaeva ◽  
A. K. M. Alsowaidi ◽  
O. S. Larionova ◽  
...  
Keyword(s):  
Aquatic Environment ◽  
Sensor System ◽  
Acoustic Sensor

AutoDietary: A Wearable Acoustic Sensor System for Food Intake Recognition in Daily Life

2016 ◽  
Vol 16 (3) ◽  
pp. 806-816 ◽  
Author(s):  
Yin Bi ◽  
Mingsong Lv ◽  
Chen Song ◽  
Wenyao Xu ◽  
Nan Guan ◽  
...  
Keyword(s):  
Food Intake ◽  
Daily Life ◽  
Sensor System ◽  
Acoustic Sensor
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