A New Method for Calculating the Target Strength Parameters of the Diver's Body Components

Unique features of active sonar and the possibility of easy transmission of acoustic signals in underwater environment provide the ability to identify and track the underwater targets. Use of sonar for diver detection in order to prevent the diver’s entrance to harbor equipment plants, protection from the coastal power and etc are the applications of acoustic signals in passive defence. Diver detection could be done by getting help from the active sonar, making an appropriate mathematical model for the diver and measuring its target strength. In diver detection by active method, its target strength is the most important factor. In this paper, target strength of body components and air cylinder have been measured using Urick cylindrical model and considering the swimming state of the diver, the results have been assembled to obtaining the returning echo from the whole body. The results have also been simulated by MATLAB software to detect the diver.