ACOUSTIC SONAR Russian patent published in 2018 - IPC G01S15/06 

FIELD: acoustics.

SUBSTANCE: invention relates to acoustic echolocation systems for subsurface sounding and can be used to detect local inhomogeneities in an acoustically transparent medium. Device comprises a video impulse generator, a radio impulse generator connected to it, an emitting acoustoelectric transducer, first receiving acoustoelectric transducer connected to a first receiver unit, a first time interval determining unit, first input of which is connected to an output of the video impulse generator, and a second input is connected to an output of the first receiver unit, as well as a second receiver unit and a second time interval determining unit, first input of which is connected to an output of the second receiver unit, and information outputs of the first and second time interval determining units are connected to a computing unit which output is connected to an indicating unit, second and third receiving acoustoelectric transducers, a third receiver unit, a coincidence circuit, a control unit, and a third time interval determining unit are introduced, wherein the emitting acoustoelectric transducer is connected to an output of the radio impulse generator, second and third receiving acoustoelectric transducers are connected respectively to an input of the second and third receiver units, first input of the third time interval detecting unit is connected to an output of the third receiver unit, its second input is connected to the output of the first receiver unit, as well as to the second input of the first and second time interval determining units, and the information output is connected to the computing unit, control outputs of the first, second and third time interval determining units are connected to the inputs of the coincidence circuit which output is connected to a control input of the computing unit, and an output of the control unit is connected to control inputs of the first, second and third time interval determining units and to a control input of the video impulse generator. Achieved technical result is provided by the use of three reception channels and the correlation processing of the received reflected impulses. It allows to determine the spatial coordinates of the inhomogeneity, reduce the effect on the result of measuring the coordinates of the shape of an object being located and the presence of small inhomogeneities in the medium.

EFFECT: technical problem to be solved is to increase the reliability and accuracy of determining the location of the inhomogeneity.

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