Device and method for detecting underwater vertical surface scouring defects of dam

Abstract

The invention discloses a device and method for detecting scour defects on the underwater vertical surface of a dam. The device includes a carrying platform, a platform and detection equipment; the carrying platform is a remote-controlled unmanned submersible, and the carrying platform includes a frame, buoyancy blocks, The propeller and the electronic cabin; the pan-tilt is a mechanical rotating pan-tilt, and the detection equipment includes an optical camera and a three-dimensional imaging sonar. Vertical side rails are arranged on both sides of the frame carrying the platform, and a horizontal partition frame is arranged in the middle. The mechanical rotating head is fixed on the partition frame, and the detection equipment is fixed on the upper part of the mechanical rotating head. A buoyancy block and an electronic cabin are also fixed above the bulkhead, and a propeller is fixed below the bulkhead of the frame. The invention also provides a method for detecting scour defects on the underwater vertical surface of the dam. The device and method for detecting scour defects on the underwater vertical surface of a dam provided by the present invention can make up for data blanks that occur during multi-beam scanning, and solve the problem of detection and application of underwater structural defects that have similar erosion phenomena to guide walls.

Description

technical field [0001] The invention relates to an underwater detection device and a detection method, in particular to a device and a method for detecting scour defects on the underwater vertical surface of a dam. Background technique [0002] In domestic water conservancy and hydropower projects, there are more than 90,000 reservoir dams. In the process of reservoir dam safety inspection and maintenance, it is necessary to find out underwater concrete defects, dam leakage, panel cracks and erosion, and metal structures. Potential safety hazards such as corrosion and reservoir sedimentation. For the detection of underwater structures such as stilling basins behind dams, tailraces and sea diffusers, the existing technology uses multi-beam and side-scan sonar to scan along a certain survey line, which can quickly scan the entire underwater area. [0003] The multi-beam sounding system, also known as the sonar array sounding system, uses the transmitting transducer array to t...

AI Technical Summary

Problems solved by technology

[0004] However, when the existing multi-beam sounding system detects the flow surface behind the dam such as the stilling basin and the sea man, it is difficult to detect the concrete defects on the vertical surface, and the side-scan sonar can only obtain the two-dimensional topographic sound map. It is difficult to obtain the size parameters of scour defects, such as panning etc.

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