Multi-modal ultrasonic nondestructive evaluation with phased arrays

相控阵多模态超声无损评估

• 批准号: 4977-2007
• 负责人: Sedov, Alexander
• 金额: $ 0.73万
• 依托单位: Lakehead University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=364774
• 关键词: Multi; modal; ultrasonic; nondestructive; evaluation

The field of nondestructive evaluation (NDE) is concerned with the inspection of materials   (without harming them),in order to keep the structures we live in, the machinery we work with, the vehicles we ride in safe and reliable. Ultrasound, used in medicine, is also used to conduct NDE inspections and to locate and identify dangerous flaws such as cracks in materials. Such ultrasonic inspections, however, involve a very complex combination of electrical and acoustic/elastic components. Modeling of these components is the focus of this research program. Specifically, we will develop computer-based models of ultrasonic NDE systems that use phased array transducers and mode-converted ultrasonic waves. Phased array transducers allow one to scan a component electronically making inspections cheaper and faster.They also allow us to generate and receive waves of different types, including  mode-converted waves that are not observable by conventional transducers. Having the ability to model such multi-modal responses using phased arrays will allow us to develop significantly improved ultrasonic inspection systems. The direct beneficiaries will be the engineers who perform inspections on major structures such as aircraft, pipelines, bridges and nuclear reactors. The general public will also benefit by those engineers having the advanced methods developed here to keep those structures safe and reliable.

无损评估（NDE）领域与检查材料的检查有关（不损害它们），以保持我们居住的结构，与我们合作的机械以及我们安全可靠的车辆。在医学中使用的超声检查也用于进行NDE检查，并找到和识别材料裂缝之类的危险缺陷。但是，这种超声检查涉及电气和声学/弹性成分的非常复杂的组合。这些组件的建模是该研究计划的重点。具体而言，我们将开发基于计算机的超声波NDE系统的模型，这些模型使用分阶段阵列传感器和模式转换超声波波。分阶段阵列换能器允许人们以电子方式扫描组件，从而使检查更便宜，更快。它们还允许我们生成和接收不同类型的波，包括传统传感器无法观察到的模式转换波。具有使用分阶段阵列对此类多模式响应进行建模的能力将使我们能够显着改善超声检查系统。直接好处将是对飞机，管道，桥梁和核反应堆等主要结构进行检查的工程师。公众还将从这里开发出高级方法来确保这些结构安全可靠的工程师受益。