It is introduced that a kind of large dynamic range laser pulse echo power measurement system.
介绍一种大动态范围激光回波功率线性测量系统。
In this paper, a equivalence sampling module for high-speed pulse echo acquisition is introduced.
文中介绍用于高速脉冲回波采集的等效采样模块。
Pulse Echo method (PEM) is a fast, economic and feasible method for Low-strain Dynamic Testing (LDT) of piles.
小应变反射波法是当前在工程桩基检测中应用的动测法之一。
Artificial intelligence principles are used to determine and analyse the defects according to pulse echo characteristics.
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。
A new method for ultrasonic distance measurement based on ultrasonic circulation and multi pulse echo principle is presented in the paper.
本文介绍了一种基于超声波循环反射测量原理的高精度超声测距方法，并给出了以单片机为核心的测距系统的组成。
Ultrasonic method for oil film thickness measurement is discussed in this paper, including the pulse echo method and the continuous wave method.
本文对超声波油膜厚度测量法进行了探讨。它包括脉冲反射法和连续波法。
The method is based on Pulse echo characteristic in oil film. Separatingone pulse echo from reflected pulses, the oil film change is demonstrated.
其基本原理是超声波在油膜层中的反射波中分离出一条与油膜厚度的变化同步变化的反射脉冲井进行处理以显示油膜厚度。
The principle of detector is that the A-Scan flaw instrument of USL32 beams the ultrasonic to detect the bar material with the method of pulse echo once.
该系统采用A型超声波探伤仪产生超声波脉冲，采用一次脉冲反射法检测棒材。
Based on synthesizing advantages of the pulse echo and spectral ration techniques, a new method, the equivalent acoustic impedance technique is proposed.
在综合了回声法和频谱振幅比法优点的基础上，提出等效声阻抗法。
An instrument for measuring ultrasonic attenuation by means of comparing the ultrasonic pulse echo with a calibrated exponential decay wave-form is described.
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。
The result is accord with geological sample and sediment chart, so this method can be applied on sediment classification of narrow-band pulse echo sound signal.
分析结果与地质采样结果及海图均吻合，说明本文提出的方法应用于窄带脉冲信号的海底底质分类是适用的。
The four common ultrasonic methods for measuring Q value in the laboratory, rise time, pulse echo, spectral ration and waveform inversion techniques are reviewed.
回顾了实验室中超声波测量Q值的四种常用方法：上升时间法、回声法、频谱振比法和波形反演法。
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.
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。
The Methodological investigation on the measurement of thickness of downhole casing with ultrasonic pulse echo technique is carried out both in theory and in experiments.
利用理论分析和实验模拟的方法研究了超声脉冲反射技术测量井下套管厚度的方法。
The transmission rule of the lamb wave in the structure of the flexible joint is discussed, and the ultrasonic pulse echo is analyzed in the time-field and frequency-field.
本文首先分析了板波诱发纵波在柔性接头构件中的传播规律，对原始回波信号进行时域和频域分析。
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.
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。
The frequency response of the transducers is measured experimentally using laser ultrasound and a pulse echo reflecting method. The spectral analysis results are compared and analyzed.
由激光超声方法和自发自收脉冲反射法实验测定了所制作的换能器的频率响应，并比较了频谱分析结果。
Soil dynamic properties index about the test site were acquired, pulse echo dynamic test figures of model piles enclosed with soil and without soil were also acquired and analysed systematically.
获得试验场地土动力特性指标和桩周有土、无土两种情况下模型桩的反射波特性曲线，并进行了系统分析。
The characteristics of this "echo" pulse tell us about the superposition we have made. Credit: ucl.
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。
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.
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；
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.
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。
Steering exposure time of a camera through control electron shutter with laser echo pulse is an effective method for inhibiting background noise.
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。
This paper introduces two methods of ultrasonic characterization of thin layers: 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。
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.
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。
We use … used it to track potentially dangerous asteroids, sending out a strong pulse of radio waves and listening for the echo.
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。
The scheme accomplishes range tracking by adopting three range gate tracking to make middle gate always centered at echo pulse center through feedback circuit and deviation calculation circuit.
该方案采用三波门跟踪，通过偏差计算电路和反馈控制电路使中间波门中心始终对准目标回波脉冲中心，完成距离跟踪。
The laser echo acquiring and processing technique is a key technique in laser pulse imaging.
激光回波信号采集和处理技术是激光脉冲成像的关键技术。
Z echo NMR pulse sequence is proposed for using in measurement of pure dipole or quadrupole spectrum.
本文提出一个Z回波核磁共振(nmr)脉冲序列，可以获得三能级体系的纯偶极或纯四极谱。
The according pulse accumulation method is designed and realized, i. e. digitalizing the echo and synchronously accumulating them in RAM.
并设计了先对回波信号进行高速采样然后同步累加进行脉冲积累的方案。
The according pulse accumulation method is designed and realized, i. e. digitalizing the echo and synchronously accumulating them in RAM.
并设计了先对回波信号进行高速采样然后同步累加进行脉冲积累的方案。
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