Later it was taken that the optimized design for geometry parameters of longitudinal and transverse array ulpa wedges , and the principles for the optimized design of wedges " angles and the distance from piezocrystal center along wedge surface to test surface were deduced 随后进行了纵向和横向两种线阵楔块的几何优化设计，推导出楔块角度以及晶片中心沿楔块表而到探测而距离的优化设计原则。
3.
First , it was taken that a discuss about the effects of geometry parameters of each piezocrystal on direction parameters ( main lobe width , side lobe amplitude , elimination of grating lobes ) , amplitude of ultrasonic pressure , element viberation pattern , mutual radiation among elements , efficient test regions , ability to keep accurate and near - field distance and so on . based on the direction of ultrasonic field in ulpa deduced by ourselves . in addition , on the base of integrating all kinds of factors , it was put forward that the principle and method for optimized design of geometry parameters of piezocrystals in ulpa transducer , and its design programme and interface were compiled 首先在推导超声相控线阵换能器声场的指向性的基础上，就各个晶片几何参数对指向性指标(主瓣宽度、旁瓣幅度、消除栅瓣) 、声压幅值、阵元振动模式、阵元间互辐射、有效检测区域、精确控制能力、近场长度等方面的影响进行了论述，并在综合各方面影响的基础上，提出了晶片几何参数优化设计的原则和方法，编写了设计程序和界面。
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