Results 21 to 30 of about 4,800,869 (233)
IET Radar, Sonar & Navigation, 2021 Among so‐called active sensors that use self‐generated signals, sonar sensors are more challenging to implement than lidar and radar due in part to their limited angular field of sensing. A common solution to this challenge is scanning sensors that sweep
Masoud Jahromi Shirazi, Nicole Abaid
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A Track Initiation Method Based on Multiple Accumulation of Active Sonar Images
水下无人系统学报, 2023 To meet the requirements of autonomous detection of underwater moving targets in a strong reverberation background, a track initiation algorithm based on multiple accumulations of active sonar images was proposed to solve the problem of large amounts of ...
Kai WANG, Junsheng JIAO
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SCENARIOS FOR BENCHMARKING RANGE-DEPENDENT ACTIVE SONAR PERFORMANCE MODELS
VALIDATION OF SONAR PERFORMANCE ASSESSMENT TOOLS 2010, 2023 A set of eight sonar problems, pertaining to man-made active sonar, with source frequencies ranging from 250 Hz to 3.5 kHz, is defined. The scenarios are designed to emphasize range dependent propagation aspects in coastal waters, with the aim of testing
M. Zampolli, Ainslie, P. Schippers
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First direct measurements of behavioural responses by Cuvier's beaked whales to mid-frequency active sonar [PDF]
Biology Letters, 2013 Stacy Deruiter +2 more
exaly +2 more sources
Cavitation Detection in a Tonpilz-Type Transducer for Active SONAR Transmission System
Journal of Marine Science and Engineering, 2023 The active sound navigation and ranging (SONAR) transmission system emits acoustic pulses underwater using a wave generator, a SONAR power amplifier (SPA), and a projector. The acoustic pulse travel in the direction of the target and return as an echo to
R. Villalobos +4 more
semanticscholar +1 more source
Journal of the Acoustical Society of America, 2022 Sonar target recognition remains an active area of research due to the complex entanglement of features from various acoustic scatterers, background clutter, and distortion by waveguide propagation effects.
Bernice Kubicek +2 more
semanticscholar +1 more source
Robust adaptive beamforming method for active sonar in single snapshot [PDF]
MATEC Web of Conferences, 2019 Forming narrow beams is a useful way for active sonar to anti-reverberation when it works in the shallow water. High-resolution adaptive beamforming with the performance of narrow beamwidths and low sidelobe levels is a better and more efficient method ...
Sun Xu, Li Ranwei
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Modelled sonar and target depth distributions for active sonar operations in realistic environments
Proceedings of meetings on acoustics, 2022 Target detection performance of mid-frequency active sonars depends heavily on both sonar and target depth. For a given target depth, a sonar performance model may help predict a sonar depth that maximizes the detection performance in the present ...
Kristoffer Engedal Andreassen +1 more
semanticscholar +1 more source
Study on Active Tracking of Underwater Acoustic Target Based on Deep Convolution Neural Network
Applied Sciences, 2021 The active tracking technology of underwater acoustic targets is an important research direction in the field of underwater acoustic signal processing and sonar, and it has always been issued that draws researchers’ attention.
Maofa Wang +4 more
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Active Sonar Target Classification Method Based on Fisher’s Dictionary Learning
Applied Sciences, 2021 The marine environment is complex and changeable, and the interference of noise and reverberation seriously affects the classification performance of active sonar equipment.
Tongjing Sun +3 more
semanticscholar +1 more source