The Development Of Falling Container Positioning System Based On The Wireless Sensor Network

With the development of the marine transportation industry,more and more goods are transported in the form of containers.With the development of the times,the number of accidents is increasing.With the taking place of falling-containers crashes,people are caused huge loss.Even some containers loaded with dangerous chemical,which causes serious pollution to ocean.Therefore salvage of falling-containers becomes a top priority.However,rapid positioning of falling-containers is the premise of salvage of container timely.Wireless sensor network is composed of several nodes self-organized sensor network,which has been widely used locating in environmental monitoring,information collection,target detection target tracking and other fields.Compared with traditional falling-containers detection and location technology,wireless sensor network has many advantages such as lowing cost,lowing costing,self-organization and node deployment conveniently.So it is more important for salvaging of falling-container.This thesis proposes a system for the rapid positioning of falling water containers based on the wireless sensor network.Firstly the article designs a water acoustic signal transceiver unit,which is used to realize underwater ranging function based on water acoustic signal processing.It also designs surface detection nodes,beacon nodes installed on the container and the data display interface of control center.The detection node,which is positioned on the surface of the water,uses the ZigBee protocol to form a wireless sensor network by self-organizing manners.This enables the surface probe to emit water acoustic signals in an orderly manner,which establish communication with the beacon node being detected.It also realize ranging base on the TOF between detection nodes and the beacon nodes.The thesis writes software programs for surface probe nodes,beacon nodes and the data display interface of control center base on some methods of node coordinate calculation.The thesis results were given in the laboratory and the salvage house,and the location of the container was realized.