【摘 要】
：
Background, Motivation and Objective The long distance non-contact acoustic inspection method with defective detection accuracy comparable as the hammer method has been examined. This is the technique
【机 构】
：
Graduate School of Engineering, Toin University of Yokohama, Yokohama,Japan
论文部分内容阅读
Background, Motivation and Objective The long distance non-contact acoustic inspection method with defective detection accuracy comparable as the hammer method has been examined. This is the technique of having combined a scanning laser Doppler vibrometer (SLDV) and a long-distance acoustic device (LRAD). Although the directional characteristics of the LRAD itself are excellent in 1 kHz with ±15 degree. There are problems such as angular dependence nature to a subject and noise to the circumference at the time of considering practical use. Then, the case where a strong ultrasonic sound source and LDV for a single point were combined as the 2nd construction of the non-contact acoustic inspection method was examined.
其他文献
Background, Motivation and Objective Flow Mediated Dilation (FMD) is widely used to assess the endothelial function by ultrasound. Ideally, both the brachial artery wall shear stress (stimulus) and di
Background, Motivation and Objective During neurosurgery, intraoperative imaging can serve to provide feedback on cerebrovascular hemodynamics and help monitor procedures such as the placement of flow
Background, Motivation and Objective The peak blood velocity is a parameter of high medical interest used, for example, in the determination of carotid stenosis grade. The standard approach, which typ
Background, Motivation and Objective Golay Complementary Sequence (GCS) can compensate the high attenuation of high-frequency ultrasound by elevating signal level with low range side lobe and low impl
Background, Motivation and Objective In color flow imaging (CFI), achieving robust flow detection in the presence of tissue motion remains a long-standing challenge to be properly addressed. Key to ta
Background, Motivation and Objective The twinkling artifact is a phenomenon that rapidly alternating color pixels behind a stationary strongly reflecting medium where an acoustic shadow is expected in
Background, Motivation and Objective The well-known non-linear effect of acoustic radiation pressure, present in front of an emitting ultrasonic transducer, results in a net force that pushes the tran
Background, Motivation and Objective High frequency hydrophone has been applied widely in the field of clinical applications. To determine the hydrophone sensitivity precisely has vital importance on
Background, Motivation and Objective It is very difficult to inspect thick sections of concrete and related material using ultrasound. The problem is mainly scattering from aggregate and other types o
Background, Motivation and Objective Vector flow mapping (VFM) is a promising tool for capturing 2D flow vectors in the left ventricle (LV) and opening up new prospectives. By using color flow mapping