The rangefinder described is a self-contained instrument for hand-held operation by a diver for searching, tracking, navigation and surveying applications. It has four modes: (1) to measure range to a passive target directly to +or-1 m; (2) to measure range to a passive target indirectly to +or-0.1 m; (3) to measure range to a coded transponder to either +or-1 m or +or-0.1 m; and (4) to indicate the presence of multiple targets downrange where each target occurs in a selected range interval. The pulse echo principle is employed, with pulses typically 250 mus long. The carrier frequency of 300 kHz can be altered easily if required by changing the transducer array.
A multiple function sonar rangefinder for divers
Ein multifunktionaler Sonarentfernungsmesser fuer Taucher
Ultrasonics ; 22 , 1 ; 16-24
1984
9 Seiten, 11 Quellen
Aufsatz (Zeitschrift)
Englisch
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