Wireless Signal Degradation Fire Detection
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Solution Overview
Problem
Current fire detection systems in buildings lack efficient methods to accurately and promptly detect fires using wireless signal degradation analysis, particularly in environments where water vapor changes affect radio signal strength.
Innovation Solution
A wireless mesh network system that records baseline and subsequent signal characteristics within a building, using IEEE 802.11 or IEEE 802.15.4 frequency ranges, to detect abnormal signal degradations indicative of fires by pinpointing locations with increased water vapor or temperature changes, triggering alarms and fire suppression systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fire detection systems are used, then fire detection can be performed, but the detection accuracy and promptness are insufficient particularly in environments where water vapor changes affect detection reliability
Solution Approach 1:
The system segments the fire detection task into multiple independent measurement components: baseline signal characteristic recording, real-time signal monitoring, and abnormality detection. Each component operates independently to assess different aspects of fire conditions, with water vapor detection, temperature detection, and smoke detection functioning as separate but complementary measurement channels that collectively improve overall detection reliability and precision
Solution Approach 2:
The wireless signal serves multiple functions simultaneously: it carries baseline environmental data for comparison, real-time fire condition information, and location identification data. The system uses a single wireless communication infrastructure to perform what would traditionally require multiple separate detection systems, improving reliability through multi-functional verification while maintaining measurement precision through integrated analysis
2Speed
If wireless signal monitoring is used to detect fire, then detection speed improves, but the system complexity increases due to baseline recording and continuous monitoring requirements
Solution Approach 1:
The system uses existing wireless communication infrastructure and devices to perform detection functions without requiring dedicated specialized equipment. Standard wireless transmitters and receivers serve dual purposes: normal communication and fire detection, eliminating the need for complex dedicated detection hardware while maintaining fast detection response through continuous signal monitoring
Solution Approach 2:
The system performs preliminary baseline signal characteristic recording during normal operations before fire events occur. This baseline data is stored and automatically compared against real-time signals during potential fire events, enabling rapid detection without requiring complex real-time analysis of all environmental parameters from scratch
3Measurement precision
If baseline signal characteristics are recorded and compared, then detection accuracy improves, but the loss of time for baseline recording and processing increases
Solution Approach 1:
The system continuously records and monitors wireless signal characteristics during normal operations, transforming the baseline recording process from a discrete pre-event task into an ongoing useful action. This continuous monitoring maintains measurement precision by constantly updating baseline data while eliminating time loss during actual fire events, as the system is already in a state of readiness with current baseline data available for immediate comparison
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 identifies fire locations through signal strength and quality changes, enabling timely and targeted fire suppression actions, enhancing building safety and reducing false alarms.
Implementation Method 1
detect abnormal signal degradations indicative of fires by pinpointing locations with increased water vapor or temperature changes
Data Source
AI summary
A method for detecting an event in or around a building. The method includes recording a baseline signal characteristic that characterizes a wireless signal transmitted between devices in or around the building during a baseline time period and recording a second signal characteristic that characterizes the wireless signal during a second time period after the baseline time period. An event in or around the building is detected in response to a determination that the second signal characteristic is abnormal relative to the baseline signal characteristic, the event degrading the wireless signal during the second time period. An alarm is triggered in response to detecting the event.