Fire Alarm System Indoor Positioning via BLE and RFID
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Solution Overview
Problem
During fire alarm events, it is difficult or impossible to accurately count the number of individuals remaining inside a building or determine the location of those not at designated rally points, hindering the efficiency of rescue operations.
Innovation Solution
The integration of BLE receivers and RFID readers into existing fire alarm systems to detect wireless signals from user devices, utilizing algorithms for indoor positioning to provide location information of occupants to first responders, enhancing the speed and accuracy of emergency response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual counting of occupants at rally points is used, then no additional sensors or complex systems are required, but the speed and accuracy of locating individuals in danger is insufficient
Solution Approach 1:
The patent repurposes existing fire alarm system devices (smoke detectors, heat detectors, notification devices) to perform dual functions: their original fire detection role and new occupant positioning role. By integrating BLE receivers and RFID readers into these existing distributed devices, the system achieves accurate location tracking without adding separate dedicated positioning infrastructure, thus improving measurement precision while limiting device complexity increase.
Solution Approach 2:
The system utilizes user devices (smartphones, wearables) that occupants already carry to provide positioning functionality. These devices continuously broadcast identification information and signal strength data, enabling the fire alarm system to automatically track occupant locations without requiring occupants to wear special equipment or manually check in at rally points.
2Speed
If no indoor positioning system is implemented, then the system remains simple and cost-effective, but the speed of emergency response and rescue operations is hindered
Solution Approach 1:
The system performs preliminary positioning and tracking of all occupants throughout the building during normal operations. By continuously monitoring and recording location data before an emergency occurs, the system is already prepared with up-to-date position information when a fire alarm triggers, eliminating the need for time-consuming manual headcounts and enabling immediate identification of missing individuals.
Solution Approach 2:
The system implements real-time feedback by continuously receiving identification information and signal strength measurements from distributed devices, processing this data to calculate current occupant positions, and immediately updating the location display. This continuous feedback loop ensures that during an emergency, the most current position information is available without delay.
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 solution enables rapid and accurate counting of individuals at rally points and locating those in danger, thereby improving the efficiency of emergency services' rescue operations.
Implementation Method 1
The distributed devices comprise wireless receivers for receiving broadcast identification information from user devices
Data Source
AI summary
A building management system tracks occupants of a building in which the building management system is installed and presents information about the occupants, including location information, to first responders during emergency and/or training events. Distributed devices of the building management system receive identification information broadcast by user devices of the occupants and sends the identification information to a control panel of the building management system. Location information for the occupants is generated based on the identification information received from the user devices and stored along with time and date information. This location information is then retrieved and presented to first responders, for example, by displaying a map of the building with icons representing the distributed devices and occupants, based on the location information.