System and Method for Restricting Access through a Mantrap Portal

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.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation-in-part to U.S. patent application Ser. No. 10 / 702,059, entitled “Method and System for Enhanced Portal Security through Stereoscopy,” filed Nov. 5, 2003, the contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION [0002] This invention relates to security systems that permit controlled access to a secured area. Specifically, this invention relates to automatic door control in a secured area using a mantrap portal. [0003] A typical security issue associated with most access controlled portal security systems is to ensure that when a person is authorized for entry into a secured area, it is only that person that is permitted to enter. A mantrap secured portal is a configuration of a secured portal that is commonly employed for restricting access to that of only an authorized person at a time. [0004] A mantrap portal is a small room with two doors: one door for access to / from a...

AI Technical Summary

Problems solved by technology

A typical security issue associated with most access controlled portal security systems is to ensure that when a person is authorized for entry into a secured area, it is only that person that is permitted to enter.

The basic operation of a mantrap portal becomes increasingly complex as security of the portal is enhanced.

If a second, unauthorized person is permitted to enter the secured area with the authorized person, the security is breached.

Tailgating can occur when an authorized person knowingly or unknowingly provides unauthorized access through a portal to another traveling in the opposite direction.

For example, an unauthorized person entering the mantrap from the unsecured area can wait until someone leaves the secured area - and while the door is opened into the mantrap from the secured area, the unauthorized person can enter, thereby breaching security.

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