Barrier Sensor Logic for False Alarm Suppression
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Solution Overview
Problem
Security systems frequently generate false alarms when occupants forget the system is armed and open doors or windows, leading to unnecessary responses from public services and potential fines, while existing solutions that prevent false alarms do not allow monitoring of open barriers.
Innovation Solution
A barrier sensor system that includes a human detection device to determine if a person is inside the premises when a barrier is opened, preventing alarms when authorized and initiating alarms when unauthorized access is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the security system is armed to protect against intruders, then security protection is improved, but false alarms occur when occupants open doors or windows
Solution Approach 1:
A human detection device (motion sensor, camera, or biometric scanner) is introduced as an intermediary between the barrier sensor and the alarm system. When a barrier is opened, the human detection device determines whether a person is present inside the premises before triggering an alarm, thereby distinguishing between authorized occupants and unauthorized intruders
Solution Approach 2:
The system changes the parameter of alarm triggering from a simple binary state (barrier open/closed) to a conditional state that includes human presence detection. The alarm system evaluates multiple parameters (barrier status, human presence, location) before generating an alarm signal
2Reliability
If the system triggers an alarm when a barrier is opened, then unauthorized access is detected, but legitimate occupancy movements cause false alarms
Solution Approach 1:
The human detection device serves as a mediator that provides context about the person opening the barrier. It determines whether the individual is an authorized occupant or an intruder based on motion patterns, facial recognition, or other biometric data, allowing the system to respond appropriately
Solution Approach 2:
The detection system is segmented into multiple independent components: the barrier sensor detects the open/closed state, the human detection device detects presence and identifies the person, and the processor integrates this information to make an intelligent decision about whether to trigger an alarm
3Ease of operation
If the system allows occupants to open barriers without alarm, then ease of operation is improved, but monitoring capability is lost when barriers are open
Solution Approach 1:
The system dynamically adjusts its monitoring behavior based on the barrier state and human presence. When a barrier is opened by an authorized person, the system transitions to a relaxed monitoring mode that tracks the open barrier and detects subsequent movements, balancing convenience with security
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
Reduces false alarms by allowing occupants to open doors or windows while the system is armed, maintaining continuous monitoring and triggering alarms only when unauthorized access occurs.
Implementation Method 1
a human detection device for determining when a human being is inside a monitored premises in proximity to the barrier
Data Source
AI summary
A system, method and apparatus for monitoring a barrier. The barrier sensor refrains from transmitting an alarm signal to a receiver when the barrier sensor determines that the barrier has been placed into an open position and that a human being is inside the premises in proximity to the human detection device. Further, the barrier sensor transmits an alarm signal to a receiver when the barrier sensor determines that the barrier has been moved from the open position and that a human being is not inside the premises in proximity to the barrier.