Communications – electrical: acoustic wave systems and devices – Echo systems – Presence or movement only detection
Patent
1995-12-28
1998-01-27
Mullen, Thomas
Communications, electrical: acoustic wave systems and devices
Echo systems
Presence or movement only detection
340541, 902 6, G01S 1500
Patent
active
057128308
ABSTRACT:
Acoustic surveillance of objects and human traffic in spatial zones of a shopping mall and associated retail selling space is used to detect shopper traffic movement and from it, traffic data such as: shopper volume, shopper flow, crowding, and also unusual motion such as crowd surges that might connote an emergency situation. The apparatus uses phased arrays of acoustic transducers including arrays oriented in a vertical aspect which enables differentiation of non-shopping young children to arrive at more accurate headcount figures. Several specific types of detected movement defined as abnormal trigger an alert to a remote monitoring station. The alerts are automatically prioritized using rule-based criteria. Enhanced surveillance of the alert site by audio links as well as site alert history information are also provided.
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Kononov Alex
Plumlee William Wayne
Ross Paul C.
Lucent Technologies - Inc.
Mullen Thomas
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