By comparison with simple shape targets, the echo strength of the complex targets versus frequency and range is more complex.
与简单形状目标相比，复杂目标的回声强度随频率和距离的变化更为复杂。
When we use it to test the underwater target strength, one problem is how to discriminate the direct sound of the source with the echo reflected from the target, finding the target character quickly.
当利用它进行水下目标强度测试时，一个很实际的问题就是怎样区分声源直达声和目标反射回声，快速找出目标特性。
The technology which can control the transducer's driving strength according to the message of Echo is proposed in this paper.
对此本文提出了利用缺陷的回波信息调整后续驱动器激励信号强度，从而达到缺陷处等强度效果的可控强度激发技术。
The technology which can control the transducer's driving strength according to the message of Echo is proposed in this paper.
对此本文提出了利用缺陷的回波信息调整后续驱动器激励信号强度，从而达到缺陷处等强度效果的可控强度激发技术。
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