Detection And Localization Of Drowning Container Based On Underwater Acoustic Signal Processing

With the development of shipping industry,lots of goods are transported by shipping in the form of containers,by the transportation,the accident of container fell into water will happen sometimes.When the accident occurs,in order to minimize the loss of the drowning container and the pollution of the marine environment caused by the goods in containers that assist the salvage department to complete the work of salvage the containers in timely and rapidly is needed.Therefore,it is an important research topic to detect and locate the drowning container.Wireless sensor networks(WSNs)are widely used in the fields of environment detection,information acquisition and target tracking.For the detection and localization of drowning container,the traditional positioning technology have the disadvantages of low efficiency and high cost.While the WSN has the characteristics of low cost,self-organization,low power consumption,and it can be suitable for the detection and localization system of the drowning container.In this paper,a low-cost,low-energy,drowning container detection and location system is designed.By using the underwater acoustic communication between the detection node and the underwater acoustic beacon node installed on the drowning container,realized the detection,ranging and localization of drowning containers.Firstly,the commonly used localization technology of wireless sensor network is studied.An energy saving and efficient ranging method is proposed to detect and locate the drowning container.Meanwhile,in order to avoid the interference caused by the detection of different drowning container,a method of detecting and locating the drowning container based on time-frequency addressing is proposed.Then,using the software programming realized the distance measurement,time-frequency addressing and the positioning function.Thirdly,the problem of the layout of the sensor network is studied,a mathematical model of 4 coverage optimization is established for the detection nodes in the target area.Finally,the function of the system is tested,and the test results and analysis are given.