Observation of Sows with Reproductive Defects by Real Time Ultrasonic B-mode Scan
نویسندگان
چکیده
منابع مشابه
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Time-of-flight diffraction method (ToFD) is an amplitude-independent sizing method which is based on the measurement of time-of-flight of defect tip diffracted waves. Although ToFD can measure through-wall length of defect accurately, this method is not capable of measuring horizontal defect size. In this paper, a new ToFD method for evaluating horizontal planar defects is presented. The finite...
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Most frequently applied ultrasonic inspection techniques measure the reflectivity of geometric scatterers that are caused by impurities, flaws and defects in the material. Based on the echo sounder principles, the reflector has to be insonified by directed sound pulses. This requires a large number of transducers with different incident angles and sound field patterns, which are more and more r...
متن کاملTime-of-flight modeling of transversal ultrasonic scan of wood.
Time-of-flight is a time for an ultrasonic pulse to cross a sample. It contains valuable information about the mechanical properties of a material. For the ultrasonic pulse propagating in wood perpendicular to the grain the relation between the time-of-flight and the elastic constants is rather complex due to the strong anisotropicity of wood. With the help of some assumptions this relation can...
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ژورنال
عنوان ژورنال: Nihon Chikusan Gakkaiho
سال: 1986
ISSN: 1346-907X,1880-8255
DOI: 10.2508/chikusan.57.288