Security Access Control Alarm Classification Using Time Thresholds
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Solution Overview
Problem
Existing security access control systems fail to differentiate between true and false alarms, leading to inefficient responses from security staff, particularly in scenarios where a loose door triggers false alarms, and are not cost-effective for large-scale implementations.
Innovation Solution
A security system that includes electronic entry means, a request to exit device, sensors to detect door separation, and a logic unit with a timer to classify alarms based on time thresholds, distinguishing between true and false door forced open alarms by determining the intent behind door openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional security access control systems are used, then alarm detection is provided, but false alarms cannot be differentiated from true alarms leading to inefficient security staff responses
Solution Approach 1:
The system introduces time as a new parameter for alarm classification. By measuring the time interval between door opening detection and door closing detection, the system can distinguish between true alarms (longer duration) and false alarms (shorter duration), enabling precise alarm classification and efficient security staff response
Solution Approach 2:
The patent replaces traditional mechanical alarm systems with an electronic system that uses sensors, timers, and logic units to detect and classify alarms. This substitution enables more precise measurement and classification of alarm conditions, improving both measurement precision and response efficiency
2Reliability
If magnetic locks and contacts with different tolerances are installed to prevent loose door scenarios, then door security is improved, but the system becomes more complex and less cost-effective for large-scale implementations
Solution Approach 1:
The system uses a single sensor device that serves multiple functions: detecting door opening, detecting door closing, and providing data for alarm classification. This multi-functional approach maintains door security reliability while reducing system complexity compared to multiple specialized components
Solution Approach 2:
Instead of using complex mechanical tolerances and multiple contacts, the system uses time parameter measurement to distinguish between door states. The timer measures the duration between opening and closing events, providing a simple yet effective mechanism for alarm classification without adding mechanical complexity
3Ease of operation
If a crash bar or shorter recovery period hardware is added to eliminate passive request to exit device, then door exit control is improved, but the system becomes more complex and costly for large-scale sites
Solution Approach 1:
The system replaces mechanical crash bars and passive exit devices with an electronic control system. The logic unit processes sensor signals and controls door access electronically, providing easier operation and exit control while reducing mechanical hardware complexity for large-scale implementations
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
This system effectively differentiates true from false alarms, allowing for prioritized responses and reducing security staff workload, while being more cost-effective for large-scale installations by accurately classifying alarms and reducing false alarm triggers.
Implementation Method 1
a sensor device configured to detect an open door
Data Source
AI summary
A security system to identify a true door forced open alarm is provided. The security system includes an electronic entry means configured to allow access through a door. The security system also includes a request to exit device configured to indicate a request to exit the door. The security system also includes a logic unit configured to control access through the door and determine whether an open state of the door is allowed.