Honeywell International Inc.

Kevin M Pelletier

Mark Clifford Buckley

Mark A Von Striver

A system and method for detecting glass breakage using thermal imaging is provided. The system includes an infrared image detector for acquiring an infrared image of a monitored area, and a signal processor for processing the acquired images to determine removal of a glass door or window based on a comparison of the thermal signature of the acquired image against the thermal signature of a reference image. Specifically, signal processor subtracts the reference image data from the acquired image data, which results in a substantially uniform image when the acquired image matches the reference image. On the other hand, the image resulting from the subtraction exhibits significant non-uniformity when the acquired image does not match the reference image, as would be the case if the pane of glass of a door or window were broken, removed or opened.

Passive thermal image glass breakage detector

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.

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Rocklin, CA, United States of America

Kevin M Pelletier