134 音響ホログラフィ法による円管内壁表面の測定(オーガナイズドセッション : O.S.5 音響・振動の計測と可視化技術I)

概要

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A "Space Division Reconstruction (SDR) method" is proposed for acoustic imaging of inner wall surfaces in cylindrical pipes. This method uses a Paraxial Approximation to each subspace which is circumferentially divided and reconstructs the whole inner surface from these partial images. The observation region which is larger than that of the paraxial approximation region for an acoustic holography is used in order to improve angular resolution. The simulation studies reveal that the visualization of the reflectivity of the inner wall surface is possible using an ultrasonic transceiver with the wide beam width. A noted feature of this system is the ability to obtain a high angular resolution using a non-focusing beam.
一般社団法人日本機械学会の論文
2001-06-05