Mobile sensor for ground penetrating sonar

Details Mobile sensor for ground penetrating sonar Mobile sensor for ground penetrating sonar

1997-06-09

1998-09-01

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Receivers

181122, 181401, H04R 128, G01V 116

Patent

active

058020136

ABSTRACT:
A cart-mounted acoustic transmitter and receiver system for echo-locating underground structures, such as piping. A transmitting transducer, mounted in a non-resonant tube and positioned adjacent to the ground, directs sound waves downwardly through an air column while a receiving transducer, rolling over the ground, picks up echoes returned from buried objects. The rolling transducer includes a piezo-electric transducer mounted in a tubular plastic axle on which an elastomeric disc rotates making contact with the ground. A pair of port and starboard rolling transducers provide inputs to a differential amplifier to enhance detection by increasing discrimination against the return from the benign land mass.

REFERENCES:
patent: 3301345 (1967-01-01), Carder
patent: 3762496 (1973-10-01), Milberger et al.
patent: 4027753 (1977-06-01), Lantz

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