Logical pet immune intrusion detection apparatus and method
First Claim
1. An apparatus for detecting intrusions within a protected region, comprising:
- an infrared sensor assembly configured for generating at least two electrical signals in response to activity registered by two vertically adjacent infrared sensing elements within a group of at least four infrared sensing elements;
means for focusing infrared energy from a protected region upon said at least four infrared sensing elements; and
means for generating an intrusion signal in response to said at least two electrical signals responsive to the registration of sufficient infrared activity within said protected region on multiple vertically arranged said infrared sensing elements.
4 Assignments
0 Petitions
Accused Products
Abstract
A system and method of discerning human intrusion from animal presence without compromising sensitivity to human intruders exhibiting low intensity infrared signatures. At least four infrared sensing elements are arranged with at least one horizontal pair and at least one vertical pair, such as within a quad-sensing element device. To generate an intrusion alert in a pet-immune mode, simultaneous changes in infrared energy must be registered in at least two vertically adjacent detection zones spanning two tiers of sensing elements, corresponding to detecting a standing or semi-standing human intruder. Intrusion is generated in a non-pet-immune detection mode in response to registering sufficient infrared activity within any one or more individual detection zones. The focal lengths of the lens elements and position of the lens tiers are configured to produce a vertical separation of detection tiers sufficient to prevent a pet from simultaneously occupying space in two vertically adjacent detection zones.
-
Citations
45 Claims
-
1. An apparatus for detecting intrusions within a protected region, comprising:
-
an infrared sensor assembly configured for generating at least two electrical signals in response to activity registered by two vertically adjacent infrared sensing elements within a group of at least four infrared sensing elements; means for focusing infrared energy from a protected region upon said at least four infrared sensing elements; and means for generating an intrusion signal in response to said at least two electrical signals responsive to the registration of sufficient infrared activity within said protected region on multiple vertically arranged said infrared sensing elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. An apparatus for detecting intrusions, comprising:
-
an infrared sensor assembly having at least four infrared sensing elements; a lens assembly configured to focus infrared energy from non-overlapping upper and lower tiers of detection zones upon upper and lower pairs of said infrared sensing elements; and a threshold circuit configured to generate an intrusion signal in response to receipt of a sufficient level of simultaneous infrared activity on vertically separated detection zones within said upper and lower tiers of detection zones. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
-
-
38. An apparatus for detecting intrusions, comprising:
-
an infrared sensor assembly having at least four infrared sensing elements arranged in at least two horizontally-oriented sensor tiers; a lens assembly configured to focus infrared energy from non-overlapping upper and lower tiers of detection zones to said sensor tiers; and a threshold circuit coupled to said sensor tiers and configured to generate an intrusion signal in response to infrared activity; and a mode selector input coupled to said threshold circuit for selecting either a pet-immune operating mode or a non-pet-immune operating mode; wherein said threshold circuit operates within said pet-immune mode by generating intrusion signals in response to a sufficient level of infrared activity registered on at least two tiers of detection zones which are vertically adjacent to one another; wherein threshold circuit operates within said non-pet-immune mode by generating intrusion signals in response to a sufficient level of infrared activity registered on any of said infrared sensing elements. - View Dependent Claims (39)
-
-
40. A method of discriminating human intrusion from animal intrusion within an infrared detection area, comprising:
-
registering infrared intensity within the infrared detection area as received from at least two stacked non-overlapping detection tiers each having a plurality of non-overlapping detection zones; rejecting common infrared signals simultaneously occurring on horizontally adjacent detection zones within a given said detection tier; and generating an intrusion signal indicative of the presence of human intruders in response to registering sufficient simultaneous infrared activity on vertically adjacent detection zones in at least two of said stacked detection tiers. - View Dependent Claims (41, 42, 43, 44, 45)
-
Specification