The Optimized Arithmetic And Experiment Study Of Low Frequency Small Size Passive Acoustic Direction

In this paper, a passive acoustic direction system based on vector hydrophone for underwater targets is proposed. The system takes use of the combined information of the pressure and particle velocity of the target acoustic field to orient. It is made of two parts. One is direction finding which is based on the direction principle of pressure-differential vector hydrophone. The other part is control system. The carrier's probability to destroy the underwater target, when it goes down, greatly can be increased greatly by detecting target's direction and approaching target.First, the studied purpose and actuality is expatiated. Then, the arithmetic and princple based on the direction principle of pressure-differential vector hydrophone are reseached. The theory model of "three point fountain" is founded, the experiment imitates and error analysis are carried out. The software and hardware of system are optimized. The lab machine is installed and lab debugging. The experiment is carried out at the water pool and the reservoir. The experiment result is carefully discussed. The experiment, carried out on the water pool and the reservoir, shows that the signal processing system and the control system has a high capability of passive acoustic direction. The result of the research provides academic dependence for engineering application and shows that the system has a high probability of success on passive acoustic direction.The research result is practically useful for the underwater acoustic countermeasure technology, which can be applied on the acoustic target direction in the water. Using this system can increase the probability of successfully hitting the underwater target. The research is also valuable for the engineering application.