Title :
Mini-sonar---A Miniaturized Sector Scanning Sonar
Author :
Holzschuh, Jack E.
Author_Institution :
Naval Ocean Syst. Center, Kailua, HI, USA
Abstract :
Use of small submersibles has increased in recent years. A vehicle that is simply a swimming TV camera can be made quite small, but its utility is limited because of its limited view of its surroundings. The mini-sonar program was started at NOSC to develop a small sector scanning sonar for use on small vehicles without affecting their bulk. A scan-within-a-pulse type sonar was selected. Design range is 100 yards, operating frequency 300kHz, sector 80 , beamwidth 4 , and size 9 × 5 × 4 inches. An added constraint is use of pressure tolerant electronics. The largest contributing factor to meeting all these design requirements was a unique beamformer. This beamformer uses sine and cosine weighted resistors rather than a delay and sum technique. Also, by electrically switching the receiving array end for end, the required number of beam- formers is halved. This paper discusses the design of this sonar, concentrating on the beamformer.
Keywords :
array signal processing; radar signal processing; sonar; beamformer; mini sonar; miniaturized sector scanning sonar; submersibles; swimming TV camera; Consumer electronics; Displays; Electronics packaging; Frequency synchronization; Pulse amplifiers; Pulse generation; Sonar; Switches; Timing; Vehicles;
Conference_Titel :
OCEANS '80
Conference_Location :
Seattle, WA
DOI :
10.1109/OCEANS.1980.1151417