本文選題：超聲相控陣　切入點：無損檢測　出處：《電子學(xué)報》2017年10期 　論文類型：期刊論文

【摘要】：針對超聲波無損檢測的全聚焦算法(TFM)處理全矩陣數(shù)據(jù)耗時巨大的問題,本文基于橢圓弧掃描轉(zhuǎn)換提出了一種單層物體超聲波無損檢測的新全聚焦算法DEA-TFM.相對于傳統(tǒng)全聚焦算法的逆向處理過程,新算法結(jié)合計算機光柵圖形學(xué)中的橢圓繪制算法,解釋了全聚焦算法的計算過程實際上是一個正向處理過程;它將結(jié)果圖像的繪制和生成轉(zhuǎn)化為橢圓弧的掃描轉(zhuǎn)換操作和疊加;同時對原Bresenham橢圓繪制算法進行擴展,提出了繪制二維任意橢圓的改進算法,使新全聚焦算法能夠適用于任意形狀的相控陣超聲波換能器探頭.經(jīng)過仿真實驗證明,新算法和傳統(tǒng)算法有著相同的運行結(jié)果,但是新算法運行速度有一個數(shù)量級的提升.
[Abstract]:In order to solve the problem that full focus algorithm (TFM) of ultrasonic nondestructive testing (NDT) processing full matrix data takes a lot of time, In this paper, a new full-focus algorithm DEA-TFMfor ultrasonic nondestructive testing of single-layer objects is proposed based on elliptical arc scanning conversion. Compared with the reverse processing of traditional full-focus algorithm, the new algorithm combines with the ellipse rendering algorithm in computer grating graphics. It is explained that the calculation process of the full focus algorithm is actually a forward processing process, which converts the rendering and generating of the resulting image into the scanning conversion operation and superposition of the elliptical arc, and extends the original Bresenham ellipse rendering algorithm. An improved algorithm for drawing 2-D arbitrary ellipse is proposed, which makes the new full-focus algorithm applicable to the ultrasonic transducer probe of phased array with arbitrary shape. The simulation results show that the new algorithm has the same operation results as the traditional algorithm. But the speed of the new algorithm is improved by an order of magnitude.
【作者單位】： 清華大學(xué)計算機科學(xué)與技術(shù)系;
【基金】：教育部博士點基金(No.20130002110002)
【分類號】：TB559;TP391.41

【相似文獻】

相關(guān)期刊論文 前1條

1 陳亮,王廣昌;激光超聲波無損檢測技術(shù)[J];光電子技術(shù)與信息;1997年02期

相關(guān)碩士學(xué)位論文 前1條

1 占惠星;激光超聲波無損檢測片劑硬度的研究[D];南昌航空大學(xué);2010年

，

本文編號：1625542