文中介绍用于高速脉冲回波采集的等效采样模块。
In this paper, a equivalence sampling module for high-speed pulse echo acquisition is introduced.
超声脉冲回波法是一种高精度的弹性模量声速测量法。
The ultrasonic pulse reflecting method is applied to survey the dynamic elastic moduli.
采用人工智能原理，根据脉冲回波特征，对缺陷作出判断和分析。
Artificial intelligence principles are used to determine and analyse the defects according to pulse echo characteristics.
本装置用超声脉冲回波与定标指数波形比较的方法测量超声衰减。
An instrument for measuring ultrasonic attenuation by means of comparing the ultrasonic pulse echo with a calibrated exponential decay wave-form is described.
为此，他们产生高频率的超声波脉冲回波是由传感器检测和评估。
For this purpose they generate a high frequency ultrasonic pulse the echo of which is detected and evaluated by the sensor.
介绍了两种常用的材料薄层超声表征方法———纵波脉冲回波法和兰姆波法。
This paper introduces two methods of ultrasonic characterization of thin layers: longitudinal pulse-echo and Lamb waves.
本文介绍了两种目前常用的材料薄层超声表征方法——纵波脉冲回波法和兰姆波法。
This paper introduces two methods of ultrasonic characterization of thin layers: pulse-echo and Lamb waves.
超声脉冲回波法以缺陷定位准确、适用范围广、操作方便等优点广泛应用于无损检测。
Ultrasonic echo method is widely applied in non-destructive detection for its advantage of accurate defect locating, wide application, convenient operation and so on.
超声脉冲回波法以缺陷定位准确、适用范围广、操作方便等优点广泛应用于无损检测。
Ultrasonic echo method is widely applied in non-destructive detection for its advantage of accurate defect locating, wide application, and convenient operation and so on.
阐释了单个脉冲回波信号和多周期脉冲串回波信号，利用积累来提高检测性能的多种方法。
Some methods of enhancing detection performance in dealing with the single pulse echo signal and the multi-period pulse bunch echo signal by accumulating are summarized.
利用多普勒频移原理实现了运动目标速度测量，利用脉冲回波测距原理实现运动目标距离测量。
The speed of moving-target was measured based on the principle of PD frequency shift, and the range of moving-target on the pulse-echo principle.
本文报道了一种基于脉冲回波相位谱的超声波速度测量方法，并给出了它的详细理论推导过程。
This paper presents the development of a pulse-echo measurement method, based on the use of a phase spectrum to determine the ultrasonic wave velocity. A detailed descripsion of the theory is given.
自行研制了大电机定子绝缘超声波检测系统，它能同时显示被测试样的A扫描脉冲回波和C扫描平面图。
A new ultrasonic testing system has been developed for application to stator insulation of large generator. It provides A-scan signals and C-scan map for tested specimen.
提出一种宽脉冲等效法，在不降低距离分辨率的前提下可克服雷达多个脉冲回波积累检测时距离走动的影响。
The equivalent wide pulse (EWP) long coherent integrated technique with range resolution capability is proposed which can overcome range migration in a low observable target detector.
回顾了泡沫夹层结构常用的无损检测方法：空气耦合超声方法、脉冲回波超声方法以及激光错位散斑干涉方法。
The popular non destructive test methods for the foam-cored sandwich structure are reviewed; including air coupled ultrasonic method, pulse-echo ultrasonic method and shearogragh method.
本文介绍一种微机控制的声速与温度关系测量系统。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。
This paper presents a system which combines the measurement of ultrasonic velocity and temperature based on a single board microcomputer.
分析了探头调整时脉冲回波信号的变化特点，在实验的基础上构建了声束入射角与表面波时域特征值间的关系模型。
Using the characteristics of pulse echo singal during the probe adjustment, a relation model between angle of incidence and time-domain eigenvalue of reflect wave signals was proposed.
仿真与实际测试结果表明，该方法能有效提取远距离微弱激光脉冲回波信号，从而提高系统信噪比，扩大了系统原有的测程。
Simulation and actual test result shows that the new arithmetic could detect weak laser pulse signal effectively, increase the SNR and expand measuring range of laser range finder.
这种“回波”脉冲的特性可以告诉我们系统处于何种叠加态上。
The characteristics of this "echo" pulse tell us about the superposition we have made. Credit: ucl.
分析了超宽带冲激脉冲雷达与连续波雷达的不同的回波特性，指出冲激脉冲雷达对超低空目标探测的潜在优势。
Differences of echo characteristic between impulse radar and continuous wave radar are analyzed, and the potential of UWB impulse for Super-Low-Altitude target-detection is remarked.
脉冲展宽特性是激光回波的重要特性，其影响到回波接收信噪比和测距精度。
As an important feature, the characteristics of echo stretching affects SNR of received laser echo signal and ranging accuracy.
根据三脉冲激光雷达回波信号的特点，对信号进行差分滤波和匹配滤波处理，信噪比提高约1.5倍；
According to laser radar echo characteristic, the difference filter and the match filter were adopted. As a result, the SNR is advanced about 1.5 times.
本文研究的雷达视频回波信号模拟与仿真是针对机载下视脉冲多普勒雷达，包括目标信号、地杂波信号和噪声信号的模拟与仿真。
In the thesis, the video echo of the airborne PD radar was simulated. The simulated echoes include the signals of the target, the ground clutter and the noise.
通过对比研究激光对漫反射大目标、小目标和“猫眼”光学镜头的回波信号，给出激光主动侦察原理：对目标的距离测量应用脉冲激光测距原理实现；
Theprinciples of the laser active reconnaissance are explained via the comparison of the echo signal. target ranging isrealized by adopting the principle the pulse laser ranging.
用激光回波脉冲控制电子快门来操纵摄像机的曝光时间，是抑制背景噪声的一种有效方法。
Steering exposure time of a camera through control electron shutter with laser echo pulse is an effective method for inhibiting background noise.
我们通常…通常用它来跟踪有潜在危险的小天体，发出强大的无线电脉冲然后聆听回波。
We use … used it to track potentially dangerous asteroids, sending out a strong pulse of radio waves and listening for the echo.
文中以脉冲雷达回波信号和相位码信号为例。
Phase coded signal and the pulse radar echo have been simulated.
通过在特定时刻对DDS生成的信号进行补相，可以使单dds同时生成多个目标的与被测雷达全相参的常规脉冲和线性调频回波信号。
By setting the DDS's offset phase at given time, a single DDS can generate multi-target phase-coherence signals including LFM and general pulse for evaluated radar.
并且讨论了在脉冲多普勒相参体制雷达下目标回波的相位信息以及目标信号的多普勒谱特性。
Then discussing the phase information and Doppler characteristic of target echo wave in the pulse Doppler phase radar.
并且讨论了在脉冲多普勒相参体制雷达下目标回波的相位信息以及目标信号的多普勒谱特性。
Then discussing the phase information and Doppler characteristic of target echo wave in the pulse Doppler phase radar.
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