Security door system
First Claim
1. A method of operating a revolving security door system, said door system comprising a substantially arcuate drum defining an enclosure and opposed first and second openings, a revolving door disposed for rotation within the enclosure and including plural radially extending door wings, a secure zone within said enclosure, first sensor means disposed generally along a radial line extending from an axis of rotation of said door to said enclosure for detecting at least one of an intruder and an object moving into said zone from said first opening on a nonsecure side of said door system, said first sensor being activated the entire time said revolving door is revolving, and second sensor means comprising plural object detection sensors for sensing the presence of an object remaining in said zone, said method comprising:
- rotating said door to allow an authorized person to pass from said second opening on a secure side of said door system to said first opening;
generating a light curtain by said first sensor;
detecting with said first sensor means an intruder entering said zone;
affirmatively deactivating said first sensor means any time a door wing passes through said light curtain; and
arresting movement of said door in response to detecting said intruder entering said zone and in a position of said door to allow said intruder to exit said zone through said first opening.
1 Assignment
0 Petitions
Accused Products
Abstract
A revolving security door includes a drum defining a secure zone between door openings controlled by a revolving door disposed within the drum and wherein light curtain sensors and active infrared sensors may detect an intruder moving from a non-secure side of the doorway to the secure side and detect objects left behind in a secure zone. Methods of operation prevent persons or objects from passing from the non-secure side to the secure side of the doorway.
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Citations
13 Claims
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1. A method of operating a revolving security door system, said door system comprising a substantially arcuate drum defining an enclosure and opposed first and second openings, a revolving door disposed for rotation within the enclosure and including plural radially extending door wings, a secure zone within said enclosure, first sensor means disposed generally along a radial line extending from an axis of rotation of said door to said enclosure for detecting at least one of an intruder and an object moving into said zone from said first opening on a nonsecure side of said door system, said first sensor being activated the entire time said revolving door is revolving, and second sensor means comprising plural object detection sensors for sensing the presence of an object remaining in said zone, said method comprising:
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rotating said door to allow an authorized person to pass from said second opening on a secure side of said door system to said first opening; generating a light curtain by said first sensor; detecting with said first sensor means an intruder entering said zone; affirmatively deactivating said first sensor means any time a door wing passes through said light curtain; and arresting movement of said door in response to detecting said intruder entering said zone and in a position of said door to allow said intruder to exit said zone through said first opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operating a revolving security door system, said door system comprising a substantially arcuate drum defining an enclosure and opposed first and second openings, a revolving door disposed for rotation within the enclosure and including plural radially extending door wings, a secure zone within said enclosure, a first sensor including a transmitter and a receiver, the first sensor being disposed generally along a radial line extending from an axis of rotation of said door to said enclosure for detecting at least one of an intruder and an object moving into said zone from said first opening on a non-secure side of said door system and plural object detection sensors for sensing the presence of an object remaining in said zone, said method comprising:
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rotating said door to allow an authorized person to pass from said second opening on a secure side of said door system to said first opening; transmitting radiation radially from said transmitter toward a reflector positioned at said axis of rotation; reflecting said radiation from the reflector toward said receiver to detect with said first sensor an intruder entering said zone; and arresting movement of said door in response to detecting said intruder entering said zone and being in a position of said door to allow said intruder to exit said zone through said first opening. - View Dependent Claims (11)
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12. A method of operating a revolving security door system, said door system comprising a substantially arcuate drum defining an enclosure and opposed first and second openings, a revolving door disposed for rotation within the enclosure and including plural radially extending door wings, a secure zone within said enclosure, a light curtain sensor including a transmitter and a receiver, the light curtain sensor being disposed generally along a radial line extending from an axis of rotation of said door to said enclosure for detecting at least one of an intruder and an object moving into said zone from said first opening on a non-secure side of said door system and plural object detection sensors for sensing the presence of an object remaining in said zone, said method comprising:
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rotating said door to allow an authorized person to pass from said second opening on a secure side of said door system to said first opening; transmitting radiation radially from said transmitter toward said axis of rotation to said receiver to detect with said light curtain sensor an intruder entering said zone; and generating a signal from a member disposed on said door wing to affirmatively deactivate said light curtain sensor when a door wing would otherwise be sensed by said light curtain sensor as said door rotates. - View Dependent Claims (13)
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Specification