Brittle Sensing Sheet for Window Intrusion Detection
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Solution Overview
Problem
Existing alarm devices fail to effectively alert emergency responders to potential forced entries at buildings, as they do not provide a discreet and reliable method to detect window damage without compromising visibility or security.
Innovation Solution
A window-integrated sensing sheet made of translucent, brittle, and electrically conductive material that breaks upon damage, triggering an alarm unit to communicate a distress call to emergency responders via a wireless network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional alarm device is used, then it can detect intrusion, but it fails to provide reliable and discreet detection of window damage
Solution Approach 1:
The sensing sheet is integrated directly into the window structure, merging the detection function with the window itself. This eliminates the need for separate complex alarm devices while providing reliable detection of window damage through the conductive properties of the sensing sheet material.
Solution Approach 2:
The patent replaces traditional mechanical alarm triggers with an electrical sensing system. The sensing sheet uses changes in electrical properties (conductivity, capacitance, or resistance) to detect window damage, substituting mechanical detection mechanisms with more reliable electrical sensing.
2Illumination intensity
If a translucent sensing sheet is used, then visibility is maintained, but the detection capability must remain effective
Solution Approach 1:
The sensing sheet is made from a composite material that combines translucency with electrical conductivity (such as conductive polymer, metallic mesh, or carbon-based materials). This allows the sheet to maintain optical transparency for visibility while simultaneously providing effective electrical sensing capability for detecting window damage.
3Ease of operation
If the sensing sheet is integrated into the window, then discreet detection is achieved, but the window structure must be modified
Solution Approach 1:
The sensing sheet is pre-manufactured as a complete functional unit with integrated conductive patterns and sensing elements before being installed into the window. This preliminary preparation simplifies the overall manufacturing process, as the sensing component can be produced separately and then integrated into the existing window structure without requiring complex modifications to the window fabrication process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a discreet and reliable means to detect window damage, ensuring timely alerts to emergency responders without obstructing visibility, enhancing building security and response efficiency.
Implementation Method 1
The sensing sheet is comprised of a brittle material thereby facilitating the sensing sheet to be broken when the window is damaged
Implementation Method 2
the alarm unit communicates a distress call to emergency responders to alert the emergency responders to the potential of a forced entry at the building
Data Source
AI summary
A burglary alarm assembly for alerting emergency responders to a forced entry includes a window that is positionable in a window opening in a building. A sensing sheet is integrated into the window and the sensing sheet is comprised of a translucent material to pass light therethrough. The sensing sheet is comprised of a brittle material thereby facilitating the sensing sheet to be broken when the window is damaged. An alarm unit is in electrical communication with the sensing sheet. The alarm unit receives an alarm input when the sensing sheet is broken to detect when the window has been damaged by a potential intruder. Moreover, the alarm unit communicates a distress call to emergency responders to alert the emergency responders to the potential of a forced entry at the building.


