Research And Design Of Bluetooth-based Indoor Fire Fighting Positioning System

With the acceleration of urbanization,the number of large-scale buildings is increasing,and the spatial structure is more complex.Once a fire occurs,it's much more dangerous and difficult for rescue.So,how to establish an efficient and stable indoor fire-fighting positioning system becomes particularly important.Traditional indoor fire positioning system mainly relies on single-soldier fire positioning equipment,which has low efficiency,high cost and poor portability,and can not be widely used.Therefore,based on the actual demands of indoor fire protection positioning,the paper proposes a Bluetooth-based indoor fire protection positioning system.The paper mainly studies from two aspects,including positioning node design and positioning algorithm design,and builds an efficient and stable indoor fire positioning system.The main contents of this paper are concluded as follows:(1)The overall design of the system: Studying the relevant technical achievements in the field of indoor positioning,analyzing the requirements of the indoor fire positioning system,the paper proposes the overall design framework of the method according to the relevant indoor fire protection design standards.(2)System positioning node design: The positioning node adopts the scheme of single-node double-ended design,which mainly includes RF module,power module,download debugging module,etc.,the paper completes the node circuit schematic and PCB design in Altium Designer and carries out tests by making real positioning node.(3)System positioning algorithm design: Analyzing and comparing the typicalindoor positioning algorithms,then combining the background of indoor fire positioning,the paper,based on the traditional indoor positioning algorithm,proposes an improved four-side positioning algorithm.The location of the target will be determined by ranging and positioning calculations on the node RSSI data received by the mobile terminal.(4)System positioning test: Selecting the system test environment and deploy the positioning node reasonably according to the indoor fire-fighting equipment installation specifications,the paper uses the mobile terminal to collect the RSSI value of the node and the improved four-side positioning algorithm to carry out positioning in Matlab and analyses positioning errors.The test shows that,in a simulated indoor fire rescue environment,the Bluetooth-based indoor fire-fighting positioning system can locate the indoor fire-fighting rescuers effectively and stably,thus to meet the indoor fire protection positioning requirements.