ACTIVE SONAR Russian patent published in 1994 - IPC

FIELD: sonic and ultrasonic technology. SUBSTANCE: active sonar has acoustical-electrical transducer connected via switch with output of pulse generator and input of amplifier. Switch changes over acoustic-electrical transducer from measurement to reception. Active sonar also has frequency-controlled self-excited oscillator whose output is connected to shaper of cycle-recurrent code connected with shaper of sync pulses and shaper of strobe pulses. Connected to control inputs of self-excited oscillator is its frequency correction unit. Output of sync pulse shaper is connected to input of pulse generator and to input of time automatic gain control whose output is connected with control input of amplifier. Output of strobe-pulse shaper is connected via multiposition switch of interval measurement to gating input of multichannel multiplexer. Outputs of cycle-recurrent code shaper are connected via multiposition switch of measured intervals to inputs of multichannel analog multiplexer. Amplifier output is connected with detector input whose output is connected with signal input of multichannel analog multiplexer whose outputs are connected with inputs of N storage locations whose outputs are connected with outputs of N discrete sources of light signals of range indicator. Object of invention is accomplished by additional introduction into active sonar of shaper of cyclic-recurrent code, sync pulse shaper, time automatic gain control, multichannel analog multiplexer, detector and N storage locations. EFFECT: increased resolving power and improved identification of registered echo signals. 2 dwg