發(fā)布時間：2018-05-20 21:04

  本文選題：超聲相控陣 + 陣元失效��； 參考：《電子學(xué)報》2017年08期

【摘要】：超聲陣列換能器單個或多個陣元的振動效率、幾何尺寸等參數(shù)的改變,會影響整個陣列的聲場分布等性能參數(shù),降低超聲檢測的分辨率及相應(yīng)的檢測效果.基于陣列換能器聲壓分布理論,利用自適應(yīng)算法,從陣元激勵的角度,探討陣列超聲換能器陣元激勵的優(yōu)化方法,消除陣元失效的影響.研究結(jié)果表明,利用聲場分布空間中有限數(shù)量的優(yōu)化參考點,經(jīng)過對激勵參數(shù)的優(yōu)化,可以使有陣元失效陣列的整個聲場分布、指向性及聚焦特性等性能指標(biāo)與標(biāo)準無陣元失效陣列的基本一致,達到期望的標(biāo)準聲場分布的參數(shù)指標(biāo),大大降低超聲檢測設(shè)備的應(yīng)用成本,提高檢測效果.
[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.
【作者單位】： 陜西師范大學(xué)物理學(xué)與信息技術(shù)學(xué)院陜西師范大學(xué)應(yīng)用聲學(xué)所;
【基金】：國家自然科學(xué)基金(No.11574192,No.11274217) 陜西師范大學(xué)中央高�；究蒲袠I(yè)務(wù)費專項資金資助(No.GK201704003)
【分類號】：TB552

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本文編號：1916229