System and Method for Restricting Access through a Mantrap Portal
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United States of America Patent
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app pub date -
May 17, 2005
filing date -
Nov 5, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and system provides increased levels of security for a mantrap portal by continuously monitoring two zones of the mantrap; a primary zone and a secondary zone. A primary sensor determines that exactly one or zero people are present in the primary zone when requesting access into a secured area. A secondary sensor determines that exactly zero people are present in the secondary zone when access to the secured area is granted. The primary and secondary sensors in combination can detect piggyback events and tailgating events before granting access to a secured area. Further, the primary and secondary sensors in combination can detect the presence of unauthorized persons in a mantrap prior to granting access to the mantrap for exit from a secured area.
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