Dual-Sensor Smoke Alarm Logic for False Alarm Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing smoke alarm systems are overly sensitive, leading to frequent false alarms and wasteful consumption of manpower and material resources due to their high sensitivity, which is advantageous for avoiding missed fires but results in unnecessary emergency responses.
Innovation Solution
A smoke alarm system that combines smoke detection with temperature detection using sampling circuits and an analysis module to generate a smoke alarm signal only when both smoke concentration and ambient temperature thresholds are met, thereby reducing false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If smoke alarm sensitivity is increased to avoid missed fires, then fire detection capability is improved, but false alarm rate increases
Solution Approach 1:
The patent combines smoke detection with temperature detection into a unified alarm system. The alarm module receives signals from both the smoke alarm and temperature detector, and only triggers an alarm when both detectors simultaneously indicate abnormal conditions. This merging of multiple detection mechanisms allows the system to maintain high sensitivity for fire detection while filtering out false alarms through cross-validation of multiple parameters.
2Measurement precision
If high sensitivity detection is used to ensure fire detection, then detection precision is improved, but resource waste increases due to false alarms
Solution Approach 1:
The system implements feedback through the alarm module that receives and processes signals from both smoke and temperature detectors. The alarm module uses logical judgment to evaluate whether alarm conditions are met based on combined inputs, providing a feedback mechanism that prevents false alarms from triggering unnecessary emergency responses. This feedback loop ensures that resource-intensive emergency actions are only taken when both detection systems confirm actual fire conditions.
Data Source
Figure 1~2A
Figure 2B~2C
Figure 3A~3B
AI summary
A smoke alarm system comprises a smoke alarm, a temperature detector, a first sampling circuit, a second sampling circuit and an analysis module; a first terminal of the first sampling circuit is connected to the smoke alarm, and a second terminal is connected to a first input terminal of the analysis module; the first sampling circuit is used for sampling from the smoke alarm to obtain a smoke sample value which is then output to the analysis module; a first terminal of the second sampling circuit is connected to the temperature detector, and a second terminal is connected to a second input terminal of the analysis module; the second sampling circuit is used for sampling from the temperature detector to obtain a temperature sample value which is then output to the analysis module; and the analysis module determines whether a smoke alarm signal is generated.