Ground penetrating sonar

Details Ground penetrating sonar Ground penetrating sonar

1997-02-14

1998-02-17

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Parametric sonar

367138, G01S 1500

Patent

active

057198233

ABSTRACT:
A ground-penetrating sonar echo locating device uses acoustic energy to locate underground structures, such as piping. A transducer, driven with two frequencies whose amplitudes would be rapidly attenuated in surface or through-the-ground transmission, is directed toward the ground through a silastic waveguide having a non-linear characteristic that produces a narrow beam of acoustic energy having neglible side lobes at a third frequency that is relatively unattenuated in ground transmission to produce reflections indicative of sub-soil conditions.

REFERENCES:
patent: 4308599 (1981-12-01), Thiele
patent: 5025423 (1991-06-01), Earp

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