基于声学参量阵一种机场驱鸟新方法的探究

在机场发生鸟撞一直以来是飞行安全中的一个重要威胁,现阶段国际上通常采用的是对鸟类无伤害的驱鸟方法,这些方法都面临着鸟类已经产生了适应习惯性了,起不到应有的驱鸟作用。本文提出了基于声学参量阵的驱鸟方法以解决信号刺激与习惯化的矛盾,从而达到机场无害驱鸟。

Study of the second harmonic sound field from a circular piston source and the influence in the nonlinearity parameter tomography

In the nonlinearity parameter B/A tomography using the second harmonic wav, it is very important to analyze the ultrasonic field of the transducer, especially the generation of the second harmonic wave in the nearfield. In this paper, the theoretical study and experimental measurements of the second harmoinc pressure field from a circular piston source are performed.And the effect on the nonlinearity parameter tomograaphy is discussed. The results will be used to decrease the error of reconstruction in nonlinearity parameter tomography and bring the ultrasoinc diagnosis a step forward