Dynamic Entry Delay Extension for Security Keypads
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Solution Overview
Problem
Current security systems trigger false alarms when users are unable to complete entering a valid access code within the preprogrammed entry delay period, leading to unnecessary alarms and resource occupation by authorities.
Innovation Solution
The system extends the entry delay period by a predetermined time interval each time a keypress matches a symbol of the valid access code, allowing users more time to disarm the system without triggering an alarm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entry delay period is fixed and relatively short to ensure quick system response and security, then system security and responsiveness are improved, but users may not have sufficient time to enter the access code, leading to false alarms
Solution Approach 1:
The entry delay period is made dynamic rather than fixed. The system automatically extends the entry delay period based on the number of keypresses entered by the user. When a user starts entering the access code, the system detects the keypresses and proportionally extends the delay period, ensuring users have adequate time to complete entry without triggering false alarms, while maintaining a relatively short initial delay for quick security response.
2Ease of operation
If the entry delay period is extended to allow users more time to enter the access code, then false alarms are reduced, but system security response time is slowed
Solution Approach 1:
The system implements a dynamic entry delay period that adjusts based on user input. The initial delay period remains relatively short to maintain quick security response. When keypresses are detected, the system proportionally extends the delay period, providing additional time only when needed. This dynamic adjustment resolves the contradiction by maintaining fast response for undisturbed scenarios while accommodating users who need more time when they are actively attempting to enter the code.
3Reliability
If the system triggers an alarm immediately when the entry delay period expires regardless of partial code entry, then system security is maintained, but false alarms increase due to user distraction or difficulty
Solution Approach 1:
The system performs preliminary detection of keypresses during the entry delay period. When keypresses are detected, the system proactively extends the entry delay period before it would normally expire. This preliminary action prevents the harmful effect of false alarms by anticipating that users may need additional time to complete their code entry, especially if they are distracted or having difficulty with the keypad.
4Ease of operation
If the system allows multiple keypress attempts with a fixed delay period, then users have opportunities to correct errors, but the fixed period may expire before users complete entry, causing alarm conditions
Solution Approach 1:
The entry delay period dynamically extends based on the number of keypresses entered by the user. As users input more keypresses, the system proportionally extends the delay period, ensuring that the time window remains sufficient for users to complete their access code entry. This dynamic adjustment prevents the entry delay period from expiring prematurely while users are attempting to enter the code, eliminating the loss of time issue while maintaining multiple attempt opportunities.
Data Source
AI summary
A system and method are provided for extending the expiration of an entry delay period for disarming a security system based on the entry of a keypress that matches a valid access code before expiration of a preprogrammed entry delay period. The security system includes a plurality of detection devices to detect any number of conditions, a user interface such as a keypad, and a control panel communicating with each of the detection devices and the user interface. The system extends the entry delay period based on the input of each keypress using the user interface that matches a symbol of a valid access code.