Page 150 - 201805

第 37 卷 第 5 期 Vol. 37, No.5
2018 年 9 月 Journal of Applied Acoustics September, 2018

纪念应崇福院士诞辰100周年

阵元固体指向性补偿对超声全聚焦成像的

优化研究 ∗

王 冲 † 毛 捷 廉国选

(中国科学院声学研究所 声场声信息国家重点实验室 北京 100190)

摘要 超声全聚焦成像中，声波的传播受到阵元指向性的影响，位于阵元不同方位的缺陷成像幅度不同。缺陷
相对阵列中心偏角越大，回波幅度越低，容易造成漏检。为提高超声全聚焦算法对固体中大偏角缺陷的成像能
力，该文引入了矩形阵元固体指向性函数，建立了基于固体指向性补偿的超声全聚焦优化算法，利用指向性系
数对不同角度区域的成像进行幅值补偿。实验结果表明，相对于基本超声全聚焦和传统指向性补偿的超声全
聚焦算法，该文固体指向性优化算法对大偏角缺陷的成像幅度补偿效果更好，检测灵敏度更高，有效避免了缺
陷漏检，扩展了超声全聚焦算法检测范围。
关键词 超声相控阵检测，全聚焦成像，指向性
中图法分类号: TB559 文献标识码: A 文章编号: 1000-310X(2018)05-0732-06
DOI: 10.11684/j.issn.1000-310X.2018.05.018

The optimization for ultrasonic total focusing method of solid directivity
compensation of array element

WANG Chong MAO Jie LIAN Guoxuan

(State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)

Abstract The propagation of sound waves is affected by the directivity of the array element, and the total
focusing imaging amplitude of defects is different from different angles. The larger the relative angle with the
array center, the lower the amplitude of the echo is, which is easy to cause the defects to be missed. To improve
the inspection effect of total focusing method (TFM) to defects with large angles relative to array center, the
far field directivity function in solid medium of a single element is applied to the TFM algorithm in this paper,
to compensate the amplitude of defects in large angle area. Experimental results show that compared with
the basic TFM algorithm and the traditional directional compensation TFM algorithm, the optimized TFM
algorithm in this paper based on solid directivity has higher detection sensitivity for defects in large angles,
and the effective detection range of TFM is expanded.
Key words Ultrasonic phased array, Total focusing method, Directivity

2018-06-13 收稿; 2018-07-03 定稿
中国科学院科研装备研制项目 (YZ201251)
∗
作者简介: 王冲 (1990- ), 男, 山东淄博人, 博士研究生, 研究方向: 超声检测与信号处理。
† 通讯作者 E-mail: wangchong@mail.ioa.ac.cn