ACOUSTIC ECHO-PULSE DETECTOR Russian patent published in 2000 - IPC

FIELD: acoustic detection systems designed for detection of objects located in different media and classification of these objects according to their acoustic resistance. The main field of application-ultrasonic inspection, as well as medicine, fish finding. SUBSTANCE: the device has a synchronizer connected to an indicator and r.f. pulse generator, whose output is connected directly to the first input of the adder and via a frequency divider-to the second input of the adder, and its output via a switch is connected to an acoustic transducer and inputs of two filters, the output of the first filter via series-connected frequency multiplies and amplifier- limiter is connected to the first input of the phase detector, and the output of the second filter is connected to the indicator signal input, and via the second amplifier-limiter-to the second input of the phase detector, whose output is connected to the second indicator signal input, in addition, the device uses the second frequency divider cut in between the output of the r.f. pulse generator and the first input of the adder, and the second frequency multiplier cut in between the output of the second filter and input of the second amplifier-limiter. EFFECT: enhanced range of detection, enhanced reliability of results. 3 dwg