Research On The Technique Of Passive Acoustic Fuse Based On Mine

The false alarm probability is an important indicator to judge the merits of the mine property and also heavily dependent on the signal detection accuracy in the Passive Acoustic Fuse of mine.The main contents of Dissertation is conducted on the three following issues of passive acoustic fuse: firstly,we researched the mechanism and acoustic characteristics of ship radiated noise and simulated the ship radiated noise with the basic acoustic characteristics.Secondly,we developed a adaptive variability index CFAR technique to ensure the Passive Acoustic Fuse of mine's detection have CFAR properties.Finally,we measured the distance of targets by exploiting the noise of targets radiated.mainly to complete the precise orientation to targets.the key is to achieve the goal of precise distance measurement with the limited space and minimal primitives in the sound array coordinate.Firstly,in order to study the Passive Acoustic Fuse of mine more realistic,we analyzed the source to be detected by the Acoustic Fuse of mine-ship radiated noise's mechanism and acoustic characteristics,built corresponding mathematical models and simulated signal of radiated noise.providing simulated signal for subsequent use of ship radiated noise suppressing ambient noise,reduce the false alarm rate.Secondly,CFAR detector is used to achieve the idea of reducing the false alarm rate of Passive Acoustic Fuse of mine.in the form of a computer simulation,simulated the environment of Acoustic Fuse of mine working.By use the signal of the radiation noise generated by ship and the environment noise we simulated,design adaptive detection threshold of VI-CFAR detection algorithm to achieve modeling and simulation of Acoustic Fuse of mine.Additionally,on the basis of results of CFAR algorithm,we estimated the probability of detection and the false alarm rate of the algorithm to verification its CFAR characteristics in the Passive Acoustic Fuse of mine.Finally,Considering the limited space,the streamline modeling and other combat indicators of mine,we set up two installation method of sensor arrays and analyze the arrays of them.Then we analyze the data collected in the Fuxian Lake to feasibility it's useful to mount such Arrays on mine.After that,we choose linear array to do some research about forecasting route of target,compared the forecasting route and the actual route.The predicted results could provide some information about if we decided to detonate or not and when we choose to detonate.By this we could minimize the probability of detonate whenthe target is out of the explosion range of mine.