Method for detecting sediment volume of hydraulic tunnel based on cross-section geometry inversion
By using a cross-sectional geometry inversion method, the sediment extent in hydraulic tunnels is automatically identified, solving the problems of reference surface error and computational efficiency in the detection of hydraulic tunnels using three-dimensional laser scanning technology, and achieving efficient and accurate sediment volume detection.
CN122244132APending Publication Date: 2026-06-19CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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Patent Information
- Application Number
- CN202610481880.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-13
- Publication Date
- 2026-06-19
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Figure CN122244132A_ABST
Abstract
This invention provides a method for detecting the volume of sediments in hydraulic tunnels based on cross-sectional geometric inversion. Step S1: Collect three-dimensional point cloud data of the hydraulic tunnel and perform noise reduction processing; Step S2: Extract the tunnel axis from the noise-reduced three-dimensional point cloud data using the upper half-section weighted centroid method, and establish a local coordinate system along the tunnel axis; Step S3: Extract the cross-sectional point cloud along the tunnel axis, and separate the cross-sectional point cloud into a wall point set and a sediment point set through iterative fitting and residual separation, fitting the complete cross-sectional curve with the wall point set; Step S4: Calculate the difference between the fitted cross-sectional area of the complete cross-sectional curve and the actual cavity area formed by the cross-sectional point cloud to obtain the sediment cross-sectional area; Step S5: Integrate the sediment cross-sectional area along the tunnel axis to obtain the total sediment volume.
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