基于椭圆弧扫描转换的超声波无损检测全聚焦算法

doi:10.3969/j.issn.0372-2112.2017.10.010

电子学报 ›› 2017, Vol. 45 ›› Issue (10): 2375-2382.DOI: 10.3969/j.issn.0372-2112.2017.10.010

基于椭圆弧扫描转换的超声波无损检测全聚焦算法

崔文凯, 秦开怀

清华大学计算机科学与技术系, 北京 100084

收稿日期:2016-02-22 修回日期:2016-07-08 出版日期:2017-10-25
- 通讯作者:
- 秦开怀
- 作者简介:
- 崔文凯,男,1990年3月出生,山东菏泽人.2011年在山东大学获得工学学士学位,2014年在中国科学院大学获得工学硕士学位.现为清华大学博士研究生,主要从事超声波成像及数字图像处理方面的研究.E-mail:cuiwk1990@163.com
- 基金资助:
- 教育部博士点基金 (No.20130002110002）

Total Focusing Method for Ultrasonic Non-Destructive Inspection of Homogenous Objects Based on Elliptical Arc Scan-Conversion

CUI Wen-kai, QIN Kai-huai

Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China

Received:2016-02-22 Revised:2016-07-08 Online:2017-10-25 Published:2017-10-25
- Supported by:
- Ph.D. Programs Foundation of Ministry of Education of China (No.20130002110002)

摘要/Abstract

摘要： 针对超声波无损检测的全聚焦算法（TFM）处理全矩阵数据耗时巨大的问题，本文基于椭圆弧扫描转换提出了一种单层物体超声波无损检测的新全聚焦算法DEA-TFM.相对于传统全聚焦算法的逆向处理过程，新算法结合计算机光栅图形学中的椭圆绘制算法，解释了全聚焦算法的计算过程实际上是一个正向处理过程；它将结果图像的绘制和生成转化为椭圆弧的扫描转换操作和叠加；同时对原Bresenham椭圆绘制算法进行扩展，提出了绘制二维任意椭圆的改进算法，使新全聚焦算法能够适用于任意形状的相控阵超声波换能器探头.经过仿真实验证明，新算法和传统算法有着相同的运行结果，但是新算法运行速度有一个数量级的提升.

关键词: 超声相控阵, 无损检测, 全聚焦算法, 椭圆绘制, 正向解释

Abstract: Since it is extremely time-consuming for the traditional total focusing method (TFM) to process ultrasonic full matrix data, a novel total focusing method based on drawing elliptical arcs (DEA), called DEA-TFM, is proposed in this paper. Unlike the reversed computing process of the traditional TFM, DEA-TFM reinterprets the new total focusing method in the forward direction to improve its performance. Combined with the generation of elliptic arcs in computer raster graphics, DEA-TFM converts the generation of the result image to scan-conversion operations of multiple elliptical arcs. Besides, based on Bresenham ellipse algorithm, a rendering algorithm applicable to arbitrary elliptic arcs is put forward, making the novel total focusing method suitable for phased array probes in any shapes. The simulation experiments show that the result images generated by the novel total focusing method, DEA-TFM, are identical to those obtained by the traditional method, but the new total focusing method speeds up the imaging process by one order of magnitude.

Key words: ultrasonic phased array, non-destructive testing, total focusing method, ellipse rendering algorithm, forward explanation

中图分类号:

TG115.28+5

崔文凯, 秦开怀. 基于椭圆弧扫描转换的超声波无损检测全聚焦算法[J]. 电子学报, 2017, 45(10): 2375-2382.

CUI Wen-kai, QIN Kai-huai . Total Focusing Method for Ultrasonic Non-Destructive Inspection of Homogenous Objects Based on Elliptical Arc Scan-Conversion[J]. Acta Electronica Sinica, 2017, 45(10): 2375-2382.

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基于椭圆弧扫描转换的超声波无损检测全聚焦算法

Total Focusing Method for Ultrasonic Non-Destructive Inspection of Homogenous Objects Based on Elliptical Arc Scan-Conversion

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