Acoustic object detection system and method

Details Acoustic object detection system and method Acoustic object detection system and method

1997-01-30

1998-10-27

Swann, Glen

Communications, electrical: acoustic wave systems and devices

Echo systems

Presence or movement only detection

340553, G08B 1316

Patent

active

058286268

ABSTRACT:
A standing wave field is generated within a protected space, the standing wave field comprising a plurality of signals traveling along a plurality of propagation paths within the protected space, the propagation paths including reflections of the signals off of objects within the protected space. A change in a predetermined characteristic of the standing wave field is detected upon the changing of a physical characteristic of an object within said protected space, and an alarm signal is generated when said change in the standing wave field is greater than a predetermined threshold value.

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