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| 混凝土缺陷识别与超分辨率成像方法 |
| Identification of defects in concrete and super-resolution imaging method |
| 投稿时间：2025-05-22 修订日期：2025-06-13 |
| 中文摘要: |
| 声波传输遵循瑞利准则，超声成像存在分辨率阈值。针对混凝土内部缺陷间距小于分辨率阈值的两个缺陷，传统的全聚焦成像无法区分，本文提出时间反转全聚焦成像先提高成像分辨率，再设计包含跳跃连接和残差块的轻量化网络模型的超分辨率重构方法，在时间反转全聚焦成像图的基础上，提取损伤特征，去除噪声干扰，实现超分辨率重构。实验结果表明：该方法能突破瑞利准则的限制，有效识别混凝土内部小于分辨率阈值的两个缺陷，检测精度达99.69%，实现缺陷的超分辨率重构。 |
| 英文摘要: |
| Ultrasound phased array imaging exists a resolution threshold affected by acoustic diffraction. Traditional total focus method cannot distinguish adjacent defects with internal defect spacing less than the resolution threshold in concrete. This paper proposes time reversal total focus method to first improve the imaging resolution, and then design a super-resolution reconstruction method that includes a lightweight network model with skip connections and residual blocks. Based on the time reversal total focus method image, damage features are extracted, noise interference is removed, and super-resolution reconstruction is achieved. The experimental results show that this method can break through the limitations of the Rayleigh criterion, effectively identify adjacent defects within concrete that are below the resolution threshold, achieve a detection accuracy of 99.69%, and achieve super-resolution reconstruction of defects. |
| DOI： |
| 中文关键词: 混凝土 超声检测 全聚焦 时间反转 超分辨率 瑞利准则 |
| 英文关键词: Concrete Ultrasonic testing Total Focus Method Time reversal Super-resolution Rayleigh criterion |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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