Page 184 - 《应用声学》2023年第2期

第 42 卷 第 2 期 Vol. 42, No. 2
2023 年 3 月 Journal of Applied Acoustics March, 2023

⋄ 研究报告 ⋄

超声聚焦探头在固体中辐射声场的动态

光弹测量方法 ∗

候满钊 1,2 陈秋颖 1† 周雨轩 1 廉国选 1 毛 捷 1,2

(1 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)
(2 中国科学院大学 北京 100049)
摘要：超声聚焦探头在声场聚焦区域具有很高的检测灵敏度和分辨力，是工业超声检测中常用的探头。聚焦
探头在固体中的聚焦特性直接影响检测效果，其传统测量方法通过水中聚焦参数间接换算而来，结果存在一
定的误差。动态光弹法可以直接观测透明固体中的探头辐射声场，具有直观、无反射体或水听器的浸入影响、
全场观测等特征。进一步采用圆偏振光并结合 Senarmont 补偿法，可精确测量透明固体中探头辐射声场的绝
对应力分布，给出聚焦探头在固体中的聚焦参数，包括焦距、焦柱长度和焦斑宽度。实验测量结果与有限元仿
真计算及小球反射法测量结果吻合较好，表明了动态光弹法定量测量聚焦探头辐射声场的可行性。
关键词：超声聚焦探头；聚焦声场特性；动态光弹法
中图法分类号: O426 文献标识码: A 文章编号: 1000-310X(2023)02-0372-07
DOI: 10.11684/j.issn.1000-310X.2023.02.021

Dynamic photoelastic measurement method of ultrasonic focusing probe

radiating sound field in solid

HOU Manzhao 1,2 CHEN Qiuying 1 ZHOU Yuxuan 1 LIAN Guoxuan 1 MAO Jie 1,2

(1 Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)
(2 University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract: The ultrasonic focusing probe of high sensitivity and high resolution in the focus area is a commonly
used in industrial ultrasound testing field. The focusing characteristics of focusing probe in the solid directly
affect the detection effect. The traditional measurement method is indirectly converted by focusing parameters
in water, which is not direct and accurate. The dynamic photoelastic method can directly measure the sound
field parameters in the transparent solid with the characteristics of intuitive and no immersion effect of reflector
or hydrophone in the whole field. The absolute stress distribution of ultrasonic probe radiation in transparent
solid can be accurately measured by using circularly polarized light combined with Senarmont compensation
method. And the focusing characteristic such as focal distance, focal length and width can be got meanwhile.
The experimental results agreed with the finite element simulation and small ball reflection method well, which
verifies the effectiveness of dynamic photoelastic method in measuring solid sound field of focusing probe.
Keywords: Ultrasonic focusing probe; Radiated sound field characteristics; Dynamic photoelastic measure-
ment method

2022-01-04 收稿; 2022-03-03 定稿
∗ 船舶建造焊缝质量数字化检测技术研究项目
作者简介: 候满钊 (1994– ), 女, 河北石家庄人, 硕士研究生, 研究方向: 超声检测与信号处理。
† 通信作者 E-mail: chenqiuying@mail.ioa.ac.cn