Title :
Design and testing of a three-dimensional acoustical imaging system
Author :
McGehee, Duncan ; Jaffe, Jules S.
Author_Institution :
Scripps Instn. of Oceanogr., California Univ., San Diego, La Jolla, CA, USA
Abstract :
The Acoustical Imaging Group of the Marine Physical Laboratory, Scripps Institution of Oceanography, is developing a real time, high resolution three-dimensional acoustical imaging system for use in the ocean. The system, called Fish TV (FTV) is designed for the observation of macrozooplankton and small fish. The system makes use of a set of eight transmitted fan beams and a set of eight receive beams rotated 90° with respect to the transmit beams. The resulting transmit/receive pairs form a set of 64 2° by 2° beams for an overall ensonified area of 16° by 16°. The third dimension, range, is provided by time. The system operates at a center frequency of 330 kHz, with a bandwidth of 30 kHz. An experiment using an artificial target, a 40 μsec long transmitted pulse, and minimal data processing indicates that the system tracks targets with accuracy
Keywords :
acoustic imaging; aquaculture; oceanographic equipment; oceanographic techniques; sonar; zoology; 300 to 360 kHz; Acoustical Imaging Group; FTV; Fish TV; Marine Physical Laboratory; Scripps Institution of Oceanography; design; fan beam; fish; high resolution; macrozooplankton; marine animal; ocean; ocean marine biology; plankton; real time; sea; sonar; target tracking; three-dimensional acoustical imaging system; zooplankton; Acoustic beams; Acoustic imaging; Acoustic testing; High-resolution imaging; Image resolution; Laboratories; Marine animals; Oceans; Real time systems; System testing;
Conference_Titel :
OCEANS '93. Engineering in Harmony with Ocean. Proceedings
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-1385-2
DOI :
10.1109/OCEANS.1993.326221
