Acoustic ground vibration detector

Details Acoustic ground vibration detector Acoustic ground vibration detector

1987-05-27

1989-07-18

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Receivers

367180, 367136, 367188, 181112, 181122, 340566, G01V 100, G01V 116, G08B 1300

Patent

active

048499471

ABSTRACT:
In an acoustic ground vibration detector for the detection of infrasound ground vibrations, comprising at least one three-component geophone probe, the three individual geophones of said geophone probe are electrically connected in series and act upon an operation amplifier whose output signal activates a Reed relay. The activated Reed relay switches on a sound signal transmitter which produces an audible acoustic signal for the duration of the ground vibration signal. The acoustic ground vibration detector is intended in particular for locating buried persons. Moreover, it serves to protect important objects by registering infrasound ground vibrations produced by footfall sound.

REFERENCES:
patent: 3615162 (1971-10-01), Barber
patent: 4151504 (1979-04-01), Mayne et al.
patent: 4163206 (1979-07-01), Hall, Jr.
patent: 4186371 (1979-01-01), Toubkin et al.
patent: 4300135 (1981-11-01), Horn et al.
patent: 4374378 (1983-02-01), Lee
Baule, H., "Seismische Untersuchengen unter Tage", Gluckauf, Feb. 26, 1949, pp. 161-166.
Baule, H., "Das Bergbauhorchgerat., Ein hochempfindliches, klienes Afhorgerat fur Klopfzeichen und Gebirgsgerausche", Bergmannische Seitschrift Gluckauf, 1952, vol. 25/26, pp. 645-647.
Baule, H., "3D Unit", Jul. 1984 of the Dutch Company Sensor Nederland bv, 2251 AP Voorschoten.

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