减小声呐发射机余振时长的方法研究

Research on reducing residual vibration duration of sonar transmitter

为了解决目前声呐发射机中余振衰减时间较长的问题,首先分析了余振产生的原因及可能有效减小余振衰减时间的方法,并采用实验的方式验证了减少变压器匝数、采用引线电感小的连接线及减小换能器内阻这三种方法的有效性。实验证明这三种方法均可在不同程度上减小声呐发射机的余振时长;采用减少变压器匝数和减小换能器内阻这两种方法,发射机的余振时长可明显减小。余振时长直接影响余振盲区,余振时长的减小为进一步提高多普勒测速仪的性能提供了可能。

Aiming at the problem of long residual duration of the existing sonar transmitter,the cause of generating residual vibration and the methods of attenuating the residual vibration time are analyzed,and the effectiveness of these methods is verified by experiments.Starting from the actual demand,three methods to reduce the aftershock duration of sonar transmitter are studied by combing energy attenuation theory and corresponding experiments.The results show that the three methods can all reduce the aftershock duration of sonar transmitter to a certain extent,and provide an effective method to reduce the test blind area of ADCP,so as to further improve the test performance of ADCP.