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Detection and Quantitative Analysis of Defects of Underwater Concrete Structure Based on Side Scan Sonar
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Wen-hao JIANG1, Jun LU1, 2, Pan MING1, Miao-yan LIU1
Water Resources and Power | 2023, 41(8) : 161 - 165
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Water Resources and Power | 2023, 41(8): 161-165
• WATER CONSERVANCY AND HYDROPOWER ENGINEERING •
Detection and Quantitative Analysis of Defects of Underwater Concrete Structure Based on Side Scan Sonar
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Wen-hao JIANG1, Jun LU1, 2, Pan MING1, Miao-yan LIU1
Affiliations
  • 1.Nanjing Hydraulic Research Institute, Nanjing 210024, China
  • 2.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210098, China
Published: 2023-08-25 doi: 10.20040/j.cnki.1000-7709.2023.20222593
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In order to ensure the service performance of underwater concrete structures, it is urgent to carry out the detections and quantitative analyses of underwater concrete structure defects. Aiming at the common failure forms of underwater concrete structures such as collapse and indentation in practical projects, model plates with different shapes and sizes of indentations were designed and made. Using the side scan sonar carried by the unmanned ship, the defect model plates were scanned at a constant speed in a test pool. The acoustic characteristics of the defect areas were summarized by extracting the echo intensity waveforms of different shaped defects along the transverse sections. Image segmentation, mathematical morphology processing, and edge feature extraction were carried out on the original sonar image of different sizes of defects to obtain clear and complete contours of the defect areas. Through the interpretation of the longitudinal length of the defect areas, the quantitative analyses of underwater concrete defects were realized, and the identification error ratios were within 10%. It provides a new method for detecting the defects of underwater concrete structures.

underwater concrete structure  /  side scan sonar  /  defect detection  /  image processing  /  quantitative analysis
Wen-hao JIANG, Jun LU, Pan MING, Miao-yan LIU. Detection and Quantitative Analysis of Defects of Underwater Concrete Structure Based on Side Scan Sonar[J]. Water Resources and Power, 2023 , 41 (8) : 161 -165 . DOI: 10.20040/j.cnki.1000-7709.2023.20222593
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20222593
  • Receive Date：2022-12-15
  • Online Date：2026-01-28
  • Published：2023-08-25
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  • Received：2022-12-15
  • Revised：2023-04-03
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Affiliations
    1.Nanjing Hydraulic Research Institute, Nanjing 210024, China
    2.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210098, China
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https://castjournals.cast.org.cn/joweb/sdnykx/EN/10.20040/j.cnki.1000-7709.2023.20222593
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表12种不同金属材料的力学参数
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Family		 属数
Number of
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Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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