Page 217 - 《应用声学》2024年第1期

第 43 卷 第 1 期 Vol. 43, No. 1
2024 年 1 月 Journal of Applied Acoustics January, 2024

⋄ 研究报告 ⋄

圆柱类构件超声相控阵聚焦模型

孔惠元 1 王 鉴 1 李仰军 2† 韩 焱 2†

(1 中北大学 山西省信息探测与处理重点实验室 太原 030051)
(2 中北大学 山西省现代无损检测工程技术研究中心 太原 030051)

摘要：在利用平面相控阵超声换能器对圆柱类构件检测时，受曲界面结构引起的入射波和回波时延的影响，扫
描声束的波阵面产生弯曲，在利用传统迭代遍历算法计算延迟时间时效率低，无法发挥相控阵换能器检测优
势。针对上述问题，建立了一种基于圆柱类构件特征和耦合介质特性的超声相控阵扫描成像的聚焦模型。该
模型基于换能器、耦合介质、圆柱类构件材料特性和几何关系以及声线模型和折射定律，建立了耦合介质及被
检构件的声速、曲面曲率半径、阵列与曲面间的距离等关联的延迟时间聚焦控制模型。利用该模型计算出的延
时时间，对各阵元发射时间进行控制，从而实现扫描声束的聚焦。该文以液体和有机玻璃制介质楔块为例，对
圆柱钢曲面的相控阵声束聚焦进行了仿真实验，结果表明该文方法计算效率显著提升，同时声束可以在预设
位置实现聚焦，验证了该模型在计算效率上的优势与有效性。
关键词：相控阵超声检测；圆柱类构件；聚焦模型
中图法分类号: TB559; O426.9 文献标识码: A 文章编号: 1000-310X(2024)01-0213-10
DOI: 10.11684/j.issn.1000-310X.2024.01.025

The ultrasonic phased array focusing model of cylindrical component

KONG Huiyuan 1 WANG Jian 1 LI Yangjun 2 HAN Yan 2

(1 North University of China, Shanxi Key Laboratory of Signal Capturing & Processing, Taiyuan 030051, China)
(2 North University of China, Shanxi Research Center of Modern NDT Engineering Technology, Taiyuan 030051, China)

Abstract: When planar phased array ultrasonic transducer is used to detect cylindrical components, the
wave front of the scanned acoustic beam is bent due to the impact of incident wave and echo delay caused by
the curved interface structure. The traditional iterative traversal algorithm has low efficiency and accuracy
error in calculating the delay time, so it can not give full play to the advantages of phased array transducer.
Aiming at the above problems, a focusing model of ultrasonic phased array scanning imaging based on the
characteristics of cylindrical components and coupled media is established in this paper. Based on the material
properties and geometric relations of transducer, coupling medium, cylindrical component, sound model and
refraction law, the delay time focusing control model is established to correlate the sound velocity, curvature
radius of surface, distance between array and surface of the coupling medium and the component under test.
The delay time calculated by the model is used to control the emission time of each array, so as to realize
the focus of the scanning sound beam. This paper takes liquid and plexiglass wedges as examples to simulate the

2023-06-30 收稿; 2023-10-14 定稿
作者简介: 孔惠元 (1998– ), 男, 山西忻州人, 硕士研究生, 研究方向: 超声检测。
† 通信作者 E-mail: liyangjun@nuc.edu.cn; hanyan@nuc.edu.cn