Bendable Phased-Array Ultrasound Transducer for Imaging on Curved Surfaces

IF 16 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Nano Pub Date : 2025-02-20 DOI:10.1021/acsnano.4c16028

Shizhen Yin, Han Zhang, Fangfang Shi, Yiming Chen, Chao Zhong, Rui Li, Yewang Su

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Abstract

Flexible phased-array ultrasound transducers (PAUTs), promising for nondestructive testing in biomedical and industrial applications, are classified as stretchable or bendable. Stretchable PAUTs offer a superior solution for complex curved surfaces but face substantial variations in piezoelectric element pitches, particularly on surfaces with small radii, complicating position correction algorithms. Meanwhile, real-time measurement of the pitches remains a technical difficulty. In contrast, bendable PAUTs with limited variable pitches are currently more practical for engineering applications. This paper introduces an innovative bendable PAUT featuring a constant-pitch-preservation (CPP) design. It includes a flexible 12 × 12 piezo-composite element array bonded with silicone, allowing conformity to surfaces with varying curvatures while maintaining constant element pitches. This design enables accurate progressive time delays for precise ultrasound beam steering and focusing. Individual backing and matching blocks for each piezoelectric element enhance detection performance. Experimental results from pulse-echo inspections and sector scans validate its effectiveness in high-quality imaging.

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曲面成像的可弯曲相控阵超声换能器

柔性相控阵超声换能器（pats）分为可拉伸和可弯曲两类，有望用于生物医学和工业领域的无损检测。可拉伸pats为复杂曲面提供了优越的解决方案，但面临压电元件螺距的实质性变化，特别是在半径较小的表面上，使位置校正算法复杂化。同时，球场的实时测量仍然是一个技术难题。相比之下，具有有限可变螺距的可弯曲pats目前在工程应用中更为实用。本文介绍了一种具有恒定螺距保护（CPP）设计的创新可弯曲pat。它包括一个柔性的12 × 12压电复合元件阵列，与硅树脂结合，允许与不同曲率的表面一致，同时保持恒定的元件间距。这种设计可以实现精确的渐进时间延迟，以实现精确的超声波光束转向和聚焦。每个压电元件的单独支撑和匹配块提高了检测性能。脉冲回波检测和扇形扫描的实验结果验证了其在高质量成像中的有效性。

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来源期刊

ACS Nano 工程技术-材料科学：综合

CiteScore

26.00

自引率

4.10%

发文量

1627

审稿时长

1.7 months

期刊介绍： ACS Nano, published monthly, serves as an international forum for comprehensive articles on nanoscience and nanotechnology research at the intersections of chemistry, biology, materials science, physics, and engineering. The journal fosters communication among scientists in these communities, facilitating collaboration, new research opportunities, and advancements through discoveries. ACS Nano covers synthesis, assembly, characterization, theory, and simulation of nanostructures, nanobiotechnology, nanofabrication, methods and tools for nanoscience and nanotechnology, and self- and directed-assembly. Alongside original research articles, it offers thorough reviews, perspectives on cutting-edge research, and discussions envisioning the future of nanoscience and nanotechnology.