This paper describes a new signal processing technique for the accurate measurement of small (sub wavelength) thicknesses of membrane-like structures using pulse-echo ultrasound. An examination of the discrete-time signal in complex frequency space reveals easily identifiable features whose location ...
SonicPy: a suite of programs for ultrasound pulse-echo data acquisition and analysis Sound speed and elastic constants measurements in solids and liquids are commonly performed using the ultrasound pulse-echo technique. Recent advances have... R Hrubiak,BT Sturtevant - 《High Pressure Research》 被...
M Pernot,Mickal Tanter,M Fink - 《Ultrasound in Medicine & Biology》 被引量: 201发表: 2004年 Ultrasonic Imaging of Concrete Elements Using Reconstruction by Synthetic Aperture Focusing Technique Pulse-echo measurement systems are described, which are able to acquire large sets of data on linear ...
Pulse-echo ultrasound system utilizing conjugate e 专利名称：Pulse-echo ultrasound system utilizing conjugate emitting and receiving apertures 发明人：William S. Trimmer,David H. R. Vilkomerson 申请号：US06/335919 申请日：19811230 公开号：US04430898A 公开日：19840214 专利内容由知识产权出版社提供 摘要...
Methods applied include calorimetry, dilatometry; the laser flash technique for thermal diffusivity measurement and ultrasound pulse echo for the measurement of ... - 《Steel Research International》 被引量: 8发表: 2012年 加载更多0关于我们 百度学术集成海量学术资源,融合人工智能、深度学习、大数据分析等...
2.1.1 Pulse–echo technique In this method the pulsed sonic wave is shouted into the material and the echo signal is received where a single transducer acts as a transmitter and a receiver. In this case, traveling time (t) of the wave is measurable and the length of the material (L) ...
Ultrasound has been proposed as an alternative 3D method to read out dosimetric gels. The ultrasonic properties of MAGIC gel are investigated in relation to producing a dosimetry system based on a pulse-echo technique. The sound speed, attenuation coefficient, and density of MAGIC gel were measured...
1) ultrasonic pulse-echo method 超声回波法 2) Ultrasonic 超声 1. Application of ultrasonic technique in the preparation of TiO_2 based photocatalysts; 超声在TiO_2基光催化剂制备过程中的应用 2. The application of split-radix algorithm in pipeline corrosion ultrasonic inner inspection; ...
A pulse-echo, immersion method for ultrasonic evaluation of a material which accounts for and eliminates nonlevelness in the equipment set-up and sample thickness variation effects employs a single tr
The echo signal polluted by noise needs to be filtered in the ultrasound imaging system. However, the conventional fixed bandpass filter doesn't work effectively, because the bandwidth and center frequency of the ultrasound echo signal is time-varying. The Adaptive filter with NLMS then is applied...