pulse attenuation

Pulse-echo based ultrasonic attenuation model for porosity test of carbon fiber composites

碳纤维复合材料孔隙率的脉冲反射法超声衰减测试模型

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In this paper, a measurement system of UWS electromagnetic pulse radiating field is developed, which consisted of TEM horn, coaxial transmitting line, wide band oscillograph and data processing software for the compensation of signal attenuation and aberration.

介绍了一套自行研制的高功率超宽谱电磁脉冲辐射场测量系统，该系统主要由TEM喇叭接收天线、同轴传输线、宽带示波器及微型计算机组成。

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Inputting high-frequency and single pulse signal into coaxial line, the time delay and distortion caused by dispersion can be recorded and measured by digital oscilloscope. The line length and attenuation coefficient are achieved.

将高频单脉冲信号输入同轴电缆，借助数字存储示波器记录输入、输出端的波形和相对延时，可以测量传输线的电缆长度和衰减系数，同时观察脉冲波形因色散引起的畸变。

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In this paper, an automatic voltage-controlled attenuation method suppressing interference pulse with double time constant, is presented.

本文提出了一种抑制干扰脉冲的开环双重时间常数自动压控衰减法（Dτ-VCA）。

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There are three filtering parameters that are very important, that is pulse length Δτ, band width Δω and attenuation factor Δα, the optimum values of which are determined by experiments.

在进行proni滤波时，有3个滤波参数至关重要，即脉冲长度Δτ、频带宽度Δω和衰减因子Δα，Δτ、Δω和Δα的最佳值要经实验认定。

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