Space surveillance apparatus with sound source and method of sho

Details Space surveillance apparatus with sound source and method of sho Space surveillance apparatus with sound source and method of sho

1986-05-20

1988-07-05

Swann, III, Glen R.

Communications, electrical: acoustic wave systems and devices

Echo systems

Presence or movement only detection

181142, 340388, 340529, G08B 1316

Patent

active

047559730

ABSTRACT:
A space surveillance apparatus includes at least one source of sonic radiation driven by a driver circuit as well as a processing or evaluation circuit. Upon movement of an object, or presence of a foreign object within a monitored space, the processing circuit triggers an alarm signal. Each sonic source defines the volume of its own monitored space, according to the equation:

REFERENCES:
patent: Re25100 (1961-12-01), Chapin
patent: 3098213 (1963-07-01), Auer, Jr.
patent: 3343167 (1967-09-01), Rademacher
patent: 3474400 (1969-10-01), Auer et al.
patent: 4086574 (1978-04-01), Miyabe
patent: 4608674 (1986-08-01), Guscott
Trade Journal Article "Holographie Acoustique: Bonjour Les Degats;" Mesures, Regulation, Automatisme, vol. 49, No. 5, Apr., 1984.

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