Research On The Technology Of Torpedo Sonar Target

Torpedo sonar target is one kind of acoustic electric drone which is used for torpedo under water experimentation. It can receive the acoustic signal in the water, and tests if there is"detection"signal in it. If it has tested the"detection"signal, then it sets the target's intension, Doppler excursion and radiate noise, then, sends the echo back. The paper studied deeply the correspond theory of the sonar target. The main work includes:1. Studied the corresponding theory and technique of the sonar information processing. Discussed the mechanism and mode of the sonar target based on the passive sonar equation. Then discussed the characteristics of the target's echo in the water, including the target's intensity, Doppler excursion, delay of the echo, and noise interference .Then introduced some methods of how to distill the target's information.2. According to the sonar target's function requirements, the overall hardware design was given.. The whole system can be divided into DSP module; FPGA module; signal gathering module; signal output module ;isolating module; peripherally memory module; network module; clock module and power module, all modules were introduced clearly here.3. According to the technical demands and the hardware design, the overall software design was given; Explained every function module's implementation in detail, introduced the mathematic model and implementation of the best detecting system; finally introduced the way how to carry out the Doppler excursion with interpolation and alterable sample rate.4. Finally, completed the correlative electrical test including the target's intension and Doppler excursion.