Anti-piggybacking: sensor system for security door to detect two

Details Anti-piggybacking: sensor system for security door to detect two Anti-piggybacking: sensor system for security door to detect two

1991-09-09

1993-04-13

Cuomo, Peter M.

Safes, bank protection, or a related device

Bank protection devices

Trapping mechanisms

367 93, 340541, 49 42, G08B 1316

Patent

active

052019063

ABSTRACT:
A control system for a revolving door includes an ultrasonic sensor having multiple sensor heads. The door has a housing and multiple movable compartments formed by door wings. The sensors emit energy waves into the housing in bursts, then receive echoes from any objects, including people, in the compartments. The sensors are activated when the door is activated by an authorized user. A controller stores a binary "echo" or "no echo" signal in memory in response to an emitted energy wave. The system determines a maximum height of an object or person in a compartment, then measures the total amount of time that it detects something above a selected percentage of the maximum height. When this time reaches a predetermined amount, the system interprets that as "piggybacking" (two individuals in one compartment). The system also interprets signals that go above, drop below, and then rise above the selected percentage again as piggybacking.

REFERENCES:
patent: 4060039 (1977-11-01), Lagarrigue
patent: 4060935 (1977-12-01), Miller et al.
patent: 4112419 (1978-09-01), Kinoshita et al.
patent: 4332016 (1982-05-01), Berntsen
patent: 4341165 (1982-07-01), Calandritti et al.
patent: 4347590 (1982-08-01), Heger et al.
patent: 4475308 (1984-10-01), Heise et al.
patent: 4485374 (1984-11-01), Meserow et al.
patent: 4530183 (1985-07-01), Heise et al.
patent: 4586195 (1986-04-01), DeGeorge et al.
patent: 4627193 (1986-12-01), Schwarz
patent: 4628496 (1986-12-01), Lee
patent: 4682153 (1987-07-01), Boozer et al.
patent: 5012455 (1991-04-01), Schwarz et al.
patent: 5097454 (1992-03-01), Schwarz et al.

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