CAJ | 학술논문

文章研究B超诊断仪凸阵阵元高度方向复合聚焦声场的计算并推导了方便实用的计算公式。然后进行了实验和数值计算，实验结果与理论预测相当吻合，偏差不超过7％。最后在计算机上进行数值仿真，进一步研究了声透镜的几何参数影响声场参数的规律。
문장연구B초진단의철진진원고도방향복합취초성장적계산병추도료방편실용적계산공식。연후진행료실험화수치계산，실험결과여이론예측상당문합，편차불초과7％。최후재계산궤상진행수치방진，진일보연구료성투경적궤하삼수영향성장삼수적규률。
Focusing is an effective method to improve the resolution of transducer. Usually there are two approaches to focus, one is touse piezoelectrical component with curve shapes, the other is to use lens. In this paper, the complex focusing of two approaches is studied and a better and feasible algorithm of the focusing acoustic field in the element height direction and in axial direction of ultrasonicdiagnostic B-scanner is presented. Lens shapes are descirbed and the field parameters are numerically computed. The model results werecompared to experimental measurements. It indicates that the experimental and modal results are in close agreement, and the deviationbetween them is less than 7%. After that, by means of altering the geometric parameters of transducer, the better shape of lens andsummarized regularities of sound field are obtained