ultrasonic echo

The used ultrasonic testing method is only limited to A-scope pulse-echo method.

所用的超声探伤方法仅限于八型显示脉冲反射法.

In the ultrasonic non-destructive testing, the precise position of the echo is very important information.

在超声无损检测中，回波的精确定位具有很重要的意义。

Sound field characteristic and echo wave feature in ultrasonic nondestructive test of electron beam weld

电子束焊缝超声无损检测声场特性及回波特征

Inside Scarfing Interferes with Ultrasonic Echo Signal

内毛刺形态对超声波回波信号的影响

Due to these correcting devices, the signal of ultrasonic echo waves becomes relatively complicated.

由于引入了这些校正装置, 超声回波信号变得相对复杂.

Design and analysis of the lower electronic noise circuit with a ultrasonic pulse echo ranging system

低噪声回波测距系统的电路设计与系统分析

Secondly, the technique of profile extraction based on duplicate wavelet transform is used to extract ultrasonic echo signal character owing to the trait of duplicate wavelet transform providing instantaneous phase information and the inherent relation between signal profile and object shape.

然后，根据复小波变换可以提供信号瞬时相位信息的特点，采用了复小波变换提取超声回波包络的方法，并提出一种根据包络线提取物体特征参数的技术；

To enhance the signal to noise ratio ( SNR) of fundamental ultrasonic echo signals for ultrasonic nondestructive testing ( UNDT) and ultrasonic nondestructive evaluation ( UNDE), an improved technique to suppress structural noises of ultrasonic signals was presented.

为了提高超声无损检测（UNDT）与无损评价（UNDE）基础数据的信噪比（SNR），提出了一种基于神经网络模式识别理论的小波域超声信号消噪技术。

The research technique route and tenet is to pick-up characteristic parameters by analyzing relevant ultrasonic echo signals and then found the relation between the structure configuration and evolvement process, till realize UNDE and UNDT of materials finally.

本研究的基本技术路线和宗旨是通过对超声回波信号进行相应的分析，提取模型的特征参数，并与材料的组织形态及其演变过程相关联，最终实现材料的超声无损表征与评价。

The principle of thermocouple thermometry was used for temperature measurement and the pulse-echo technique for ultrasonic velocity.

温度测量应用热电偶测温原理，声速测量采用脉冲回波技术。