Abstract: A self-energy storage device and a method applied to constant mooring tension are provided. The device includes a hydraulic cylinder, a piston rod of the hydraulic cylinder is connected to one end of a cable; an energy storage module, including a first accumulator and a second accumulator, a volume of the second accumulator is greater than a volume of the first accumulator, and a maximum pressure of the first accumulator is set greater than a maximum pressure of the second accumulator. The first accumulator and the second accumulator are respectively connected to an oil chamber of the hydraulic cylinder via a hydraulic pipeline and are connected to each other via the hydraulic pipeline. The first accumulator and the second accumulator are configured to adjust an amount of hydraulic oil in the hydraulic cylinder for adjusting a pressure in the hydraulic cylinder.

Abstract: An intelligent dredging system for a high-piled wharf and a control method thereof are provided, and the system includes an intelligent monitoring-decision control subsystem and a decentralized high-pressure water disturbance subsystem. The intelligent monitoring-decision control subsystem is composed of a high-precision pile-foundation sediment siltation warning device, a tidal monitoring device and a control terminal. The decentralized high-pressure water disturbance subsystem is composed of a water spraying device, a cable and a multi-loop power distribution device.

Abstract: An intelligent dredging system for a high-piled wharf and a control method thereof are provided, and the system includes an intelligent monitoring-decision control subsystem and a decentralized high-pressure water disturbance subsystem. The intelligent monitoring-decision control subsystem is composed of a high-precision pile-foundation sediment siltation warning device, a tidal monitoring device and a control terminal. The decentralized high-pressure water disturbance subsystem is composed of a water spraying device, a cable and a multi-loop power distribution device.

Abstract: Disclosed is a real-time detection method of a block motion based on a feature point recognition, including following steps: S1, calibrating a camera; S2, shooting digital images of a block on a surface of a breakwater by the camera, and sending the digital images to a digital signal processing system based on a field programmable gate array; S3, carrying out a feature point detection of the block in the images by the digital signal processing system; S4, carrying out a coordinate conversion after the feature point detection; S5, comparing position changes of the feature points of the block before and after a test, making a difference between coordinates of the two images before and after the test to obtain a change value of the feature points, and obtaining a displacement of the block; and S6, displaying displacement calculation results on a data processor.