Fire Alarm Control Unit Prioritizing External Alerts
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Solution Overview
Problem
Existing fire alarms often fail to reliably alert residents of external events like fires when internal events, such as battery exhaustion or maintenance needs, overlap with external events, leading to potential miscommunication or missed alerts.
Innovation Solution
A fire alarm system with a control unit that prioritizes alerts for external events like fires over internal events, using a combination of audio and visual signals to ensure timely notification, including a photoelectric sensor for smoke detection and a microcomputer for determining alert priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the alarm issues alerts for both internal events (battery exhaustion, maintenance needs) and external events (fires) simultaneously, then comprehensive monitoring is achieved, but alert reliability deteriorates when time periods overlap
Solution Approach 1:
The patent segments alert types into internal events (battery exhaustion, maintenance needs) and external events (fires, smoke detection). By categorizing and separately managing these event types, the system can apply different priority rules to each segment, ensuring that external events receive appropriate attention while internal events are handled without compromising overall alert reliability.
Solution Approach 2:
The patent changes the parameter of alert priority by introducing time period overlap detection. When the control unit determines that the time period of an internal event overlaps with an external event, it modifies the alert issuance behavior by prioritizing the external event. This parameter change (priority level) resolves the contradiction by ensuring reliable notification of critical external events while still tracking internal events.
2Reliability
If the alarm prioritizes external events over internal events during overlapping time periods, then external event notification reliability is improved, but internal event monitoring may be delayed
Solution Approach 1:
The control unit performs preliminary detection of time period overlaps between internal and external events. By identifying potential conflicts in advance, the system can proactively manage alert issuance timing, ensuring that external events are notified without delay while internal events are scheduled appropriately after the external event notification, thus minimizing time loss.
Solution Approach 2:
The system implements feedback by continuously monitoring the status of both internal and external events. When an external event occurs during an overlapping period, the system provides feedback by issuing the external event alert first, then subsequently notifying the internal event. This feedback mechanism ensures that critical external events are prioritized while internal events are still communicated, balancing reliability and time loss concerns.
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 system improves alert reliability by prioritizing fire alerts over internal events, ensuring residents are promptly notified of external threats while addressing potential confusion from overlapping events.
Implementation Method 1
a smoke detecting unit with a smoke inlet, which is provided at the center of its cover, and detects the outbreak of a fire when the concentration of smoke produced by a fire reaches a predetermined concentration
Data Source
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AI summary
An object of the present disclosure is to improve reliability relating to an alert. An alarm (1) is to be installed in a structural component. The alarm (1) includes an apparatus detecting unit (6), a control unit (10), and an alert unit (8). The apparatus detecting unit (6) is configured to detect first information corresponding to an internal event relating to the alarm (1) itself. The control unit (10) is configured to receive the first information to determine the presence or absence of the internal event. The control unit (10) is configured to receive second information relating to an external event that requires emission of an alarm sound to determine the presence or absence of the external event. The alert unit (8) is configured to issue an alert concerning the presence of the internal event and the presence of the external event. The internal event at least includes a time for replacement of the alarm (1). The control unit (10) is configured to cause the alert unit (8) to issue an alert concerning the external event with priority over an alert concerning the time for replacement.