走向基于能量的超声波成像,用于检测强散射材料中的微观缺陷
Shuzeng Zhang1, Hengkang Wang1, Xiongbing Li1
1School of Traffic and Transportation Engineering, Central South University, Changsha 410075, China.
Ultrasonics
|March 3, 2026
概括
一种新的基于能量的超声波成像方法有效地检测散射材料中的微观缺陷. 这种技术克服了谷物噪声,为使用标准设备进行非破坏性评估提供了一个实用的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 非破坏性的评价
- 超声波测试 超声波测试 超声波测试
背景情况:
- 在强烈散射材料中检测亚毫米缺陷是具有挑战性的,因为有颗粒引起的噪声.
- 传统的超声波方法与高噪声干扰作斗争,限制了缺陷可视化.
研究的目的:
- 提出一种基于能量的超声波成像方法,用于检测噪音材料中的微观缺陷.
- 为了提高检测灵敏度和分毫米级缺陷的分辨率.
主要方法:
- 使用有限元法模拟的谷物散射噪声和缺陷信号.
- 分析了光谱特征,以区分噪声和缺陷信号.
- 在频率域中计算信号能量,使用帕塞瓦尔定理和应用频率依赖权重.
主要成果:
- 颗粒噪声和缺陷信号具有不同的光谱特性 (峰值频率,带宽).
- 基于能量的方法成功地可视化了基于振幅的成像所错过的亚毫米缺陷.
- 在304不钢和Ti-6Al-4V合金中实现了高灵敏度和分辨率.
结论:
- 拟议的基于能量的超声波成像对于对散射材料中的微观缺陷进行非破坏性评估是有效的.
- 该方法提供了使用标准超声波设备而无需复杂算法的实用解决方案.
- 这种技术在严重的噪音条件下显著提高了缺陷检测能力.
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