超音波リニア・マトリクスアレイ探触子の3次元放射音場のモデル化とその性能比較

概要

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A multi-Gaussian beam (MGB) model without the paraxial approximation has been proposed in order to calculate off-axis wave fields from an ultrasonic transducer as well as on-axis wave fields. Using this MGB model, we can model three dimensional (3-D) elastic wave fields radiated from an array transducer to a solid with an efficient computational time. In this paper, brief formulations of the MGB model are described first and then the accuracy of the MGB model is checked in comparison with results of the Rayleigh-Sommerfeld numerical integral model. As applications of the MGB model, we investigate performances of both linear and matrix phased array transducers using the MGB model. Also the 3-D wave fields from the matrix phased array transducer in solid are visualized.
2009-11-25