阵元失效对超声阵列换能器的影响及优化研究

发布时间：2018-05-20 21:04

本文选题：超声相控阵 + 阵元失效　；参考：《电子学报》2017年08期

【摘要】：超声阵列换能器单个或多个阵元的振动效率、几何尺寸等参数的改变,会影响整个阵列的声场分布等性能参数,降低超声检测的分辨率及相应的检测效果.基于阵列换能器声压分布理论,利用自适应算法,从阵元激励的角度,探讨阵列超声换能器阵元激励的优化方法,消除阵元失效的影响.研究结果表明,利用声场分布空间中有限数量的优化参考点,经过对激励参数的优化,可以使有阵元失效阵列的整个声场分布、指向性及聚焦特性等性能指标与标准无阵元失效阵列的基本一致,达到期望的标准声场分布的参数指标,大大降低超声检测设备的应用成本,提高检测效果.
[Abstract]:The change of vibration efficiency and geometric size of single or multiple array elements of ultrasonic array transducer will affect the sound field distribution and other performance parameters of the whole array, and reduce the resolution of ultrasonic detection and the corresponding detection effect. Based on the theory of acoustic pressure distribution of array transducers, the optimization method of array ultrasonic transducer array element excitation is discussed from the angle of array element excitation by using adaptive algorithm to eliminate the effect of array element failure. The results show that by using the finite number of optimal reference points in the sound field distribution space and by optimizing the excitation parameters, the whole sound field distribution of the array with array failure can be made. The performance indexes such as directivity and focusing characteristics are basically the same as those of the standard non-array element failure array, which reach the expected parameter index of the standard sound field distribution, greatly reduce the application cost of ultrasonic testing equipment and improve the detection effect.
【作者单位】：陕西师范大学物理学与信息技术学院陕西师范大学应用声学所;
【基金】：国家自然科学基金(No.11574192,No.11274217) 陕西师范大学中央高校基本科研业务费专项资金资助(No.GK201704003)
【分类号】：TB552

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