Design Of Rapid Detection System For The Trapped Personnel After The Earthquake Based On WiFi

After the earthquake disaster,will lead to a part of the staff trapped in the ruins,this time an urgent need for a fast and efficient detection technology is applied to the trapped after the earthquake investigation and search and rescue to go.With the rapid use of smart phones in the market at the same time,WiFi-based short-range wireless communication technology has been greatly developed,making it possible to use WiFi-based short-range wireless communication technology to locate the target has become a reality.At present,based on mobile phone WiFi after the earthquake trapped rapid detection technology is also little research,the use of mobile WiFi to achieve the earthquake disaster trapped personnel rapid detection method is a new method of investigating personnel will be based on mobile phone WiFi positioning Technical equipment used to post-earthquake trapped personnel positioning and search and rescue have good prospects.This topic is devoted to the application of WiFi positioning technology to the rapid detection system of trapped personnel after the earthquake,the main design of a set of mobile phone WiFi signal can be obtained,and the detection of the mobile phone to quickly locate the system,through the system on the shock After the ruins of the trapped personnel in the environment to locate indirectly,to post-earthquake search and rescue work to provide an effective means of assistance.Based on the analysis of the existing WiFi positioning system,the WiFi information of the mobile phone is acquired by the WiFi hotspot device in the earthquake ruin environment and the acquired information is transmitted to the control center platform which integrates the data processing function.The platform device will process the results in a variety of forms intuitively displayed or transmitted to the superior decision system.For the analysis results,the main research results include the overall design of the fast detection system,the hardware and software design of the WiFi hotspot device,the hardware and software design,the system transplantation and the wireless data transmission test in the system.Wireless WiFi hotspot device design.The device is mainly integrated wireless WiFi communication module,GPS positioning module.Wireless WiFi module can achieve wireless WiFi work in STA and AP two modes,AP / STA mode can detect trapped mobile phone WiFi information and information processing and control center platform to communicate.Because each WiFi hotspot itself is fixed,so the GPS module can access the WiFi hotspot device itself latitude and longitude information.Design of Platform Equipment for Control Center.The platform equipment mainly integrates high-performance ARM processor,DDR3 fast memory,eMMC high-speed flash memory,GPS positioning module,wireless WiFi communication module,long-distance wireless data transmission module,LCD liquid crystal display.GPS module can obtain the location information of the control center platform for calculating the relative position of the plane with the multiple WiFi hotspots;the WiFi module can interact with the WiFi module in the wireless hotspot,obtain the WiFi information of the WiFi hotspot search and WiFi hotspot itself's geographical location information;long-distance wireless data transmission module can achieve a few kilometers away from the data transmission,can control the center of the data processing platform real-time transmission to the higher decision-making system;LCD liquid crystal display can be in the control center platform The equipment is visually showing the results of the trapped personnel after the treatment.In this paper,the design of the post-earthquake trapped personnel rapid detection system for some functional experimental test.In the wireless WiFi hotspot test,when the WiFi hotspot runs in the AP mode,by sending the WiFi signal to the surroundings,the MAC address information and RSSI information of the connected mobile phone can be obtained according to the mobile phone connected to the AP.The test on the platform is mainly when the WiFi hotspot device works in AP mode,the platform equipment and hot spots to establish a connection and data transmission test.Through the analysis of experimental test results,the design of the trapped personnel rapid detection system can effectively identify the mobile phone WiFi information within the scope of investigation,so as to achieve the rapid positioning of trapped personnel to provide a good data support.In order to be able to better play the performance of the entire system,but also the need for further optimization and expansion of the system.Equipment features to be improved areas,including WiFi hotspot search range control,the use of more accurate GPS module,reducing the physical size of the entire system for the system to provide portable mobile power and so on.Device software part of the place to be optimized,including WiFi hotspots on trapped mobile phone WiFi information and RSSI information acquisition speed.