使用超声波剪切波断层扫描来绘制混凝土部件垂直表面破裂的成像
Sai Teja Kuchipudi1,2, Sergey Pudovikov3, Herbert Wiggenhauser4
1CSIR-Central Building Research Institute, Roorkee, 247667, India.
Scientific reports
|December 8, 2023
概括
这项研究引入了一种新的超声波成像方法,使用半跳转总聚焦方法 (HSTFM) 准确测量混凝土结构中垂直裂的深度. 这种技术增强了结构安全性和耐久性评估.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 非破坏性测试是指非破坏性测试.
背景情况:
- 混凝土表面的破裂损害了结构的耐用性,因为它促进了水分和化学物质的入,加速了损坏.
- 准确估计地下裂范围对于评估结构安全性,可靠性和计划维修至关重要.
- 干点接触 (DPC) 超声波阵列的进步为混凝土中缺陷检测提供了高分辨率的成像.
研究的目的:
- 提出和评估半跳转总聚焦方法 (HSTFM) 用于使用超声波脉冲回声数据对混凝土的垂直裂进行成像.
- 为了比较HSTFM与标准的合成孔径聚焦技术 (SAFT) 用于混凝土裂的特征.
- 为估计表面破裂裂深度提供一个补充方法.
主要方法:
- 利用超声波成像的时间域脉冲回声数据中的半跳转旅行模式.
- 采用半跳转总聚焦方法 (HSTFM),处理从后墙反射的信号.
- 在模拟和实验超声波数据上评估该技术,这些数据来自有人工裂和痕的混凝土样本.
主要成果:
- 通过HSTFM技术,成功地在混凝土样本中成像了垂直裂.
- 通过分析生成图像中值反射信号的长度来估计裂深度.
- 该方法证明了其作为标准SAFT裂深度评估的补充工具的能力.
结论:
- 半跳转总聚焦方法 (HSTFM) 是一种可行的技术,用于成像和估计混凝土垂直表面破裂裂的深度.
- HSTFM补充了SAFT等现有方法,为结构健康监测和维护提供了有价值的数据.
- 这种超声波方法有助于提高混凝土结构的耐用性和可靠性评估.
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