The deformation information is obtained from ultrasonic echo time delay.
软组织的形变信息是通过超声回波延迟时间得到的。
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。
The launch system USES ultrasonic echo and reflection of the time difference to measure the distance test.
该零碎应用发射超声波与反射回波时间差来测量待测间隔。
A method about acquisition and processing of ultrasonic echo signal in liquid level measurement is introduced.
介绍了一种在液位测量中超声回波信号的采集与处理方法。
Using the time-gain compensation and peak time detecting technique, the arrival time of ultrasonic echo can be correctly detected.
采用了时间增益补偿技术和峰值时间检测技术，可正确检测超声波回波的到达时间。
The inventive diagnostic apparatus is adapted for simultaneous acquisition of ultrasonic echo signals and surface enhanced Raman spectroscopic signals.
本发明的诊断设备适于同时采集超声回波信号和表面增强拉曼光谱 信号。
By interaction between ultrasonic waves and elastic medium, it carries much information of material, which is received in the form of ultrasonic echo signals.
它是利用超声换能器的振动产生的超声波与弹性介质相互作用，从而携带了有关材料组织性能的信息，这种信息随同超声回波信号被接收到。
Methods 17 patients were examined by trans thoracic echocardiography(TTE), and observed the membrane shape ultrasonic echo, blood stream change in aortic canal.
方法采用经胸超声（TTE）检查17例夹层动脉瘤患者，观察主动脉管腔内有无膜样回声及管腔内血流情况。
By interaction between ultrasonic waves and elastic medium, it has carried much information of material, which are received in the form of ultrasonic echo signals.
它是利用超声换能器的振动产生的超声波与弹性介质相互作用，从而携带大量有关材料性能的信息，这种信息以超声回波信号的形式被接收到。
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。
For the detection and processing of ultrasonic echo signal, the method proposed by this paper is able to improve the whole precision on a certain technical condition.
对于超声回波信号的检测与处理，本文提出的方法在一定的技术条件下可以实现回波信号整体检测精度的提高。
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.
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。
This paper attempts to preprocess ultrasonic signal by wavelet filtering based on the mathematical model of the ultrasonic echo, extracts weak echoes from signal with high noise background.
在超声反射回波的数学模型基础上，利用小波滤波方法对超声信号进行预处理，提取强噪声背景中的弱回波信号。
Based on studying the generating and receiving circuit of ultrasonics, this dissertation analyzes that the key to improve measuring accuracy is how to seek the starting time of ultrasonic echo signal.
在研究了超声波信号的产生、接收电路的基础上，分析了提高测量精度的关键在于如何精确地寻找到超声波回波信号的起点时刻。
Echo Sounder is a kind of acoustic measuring depth equipment, which can measure depth with the time between transmitted wave and echo on condition in which the speed of ultrasonic is fixed.
回声测深仪是用来测量水深的一种声学测量设备，其以水中超声波的传播速度为确定条件，利用发射波与反射回波时间差来测量水深。
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。
In the a high frame rate (HFR) ultrasonic imaging system, the weighting process by limited diffraction beams on echo signal takes the most of the calculation time for constructing an image.
在高帧率超声成像算法中，对回波信号进行有限衍射波束加权处理占用了成像中大部分计算时间。
Meterials and Methods: Reviewing the ultrasonic data of 76 cases with spleen mass proved by operation and pathology. The size, number, border, interior echo of the lesions were analysed.
材料和方法：回顾性分析76例脾脏肿块患者的超声检查资料，分析脾脏肿块的大小、数目、边界、内部回声等多种超声表现。
Methods: Doppler ultrasonic diagnostic apparatus was used to observe the form, echo, activity and blood flow.
方法应用彩色多普勒超声诊断仪观察心脏瓣膜形态、回声、活动状态、瓣口血流情况。
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。
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。
It is often misjudged the flaw echo in ultrasonic examination that the echo signals produced by sound field property and geometrical shape of the component examined according to sound field theory.
超声探伤中，由于声场特性、件几何形状的影响，所产生的各种回波信号常常被误判为缺陷信号。
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 ultrasonic defect echo of a austenite stainless steel with coarse grainswas acqiuired and processed using a developed computerized ultrasonic signal analysissystem.
采用计算机化超声信号分析系统，对奥氏体不锈钢粗晶材料缺陷的超声回波信号进行采集和加工。
The good performances of ultrasonic transmission and echo composition of the system are validated by the experiments.
试验表明该系统具有良好的超声发射和回波合成能力。
This paper introduces an ultrasonic ranging method based on analyzing the envelope of echo .
介绍了一种基于回波包络分析的高精度超声波测距方法。
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。
The measurement of crack height by ultrasonic edge peak echo method and digital signal processing was described, and the results were given.
介绍采用数字信号处理的超声端点反射回波声程测量裂纹高度的方法研究和结果。
The measurement of crack height by ultrasonic edge peak echo method and digital signal processing was described, and the results were given.
介绍采用数字信号处理的超声端点反射回波声程测量裂纹高度的方法研究和结果。
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