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12238results about "Waterborne vessels" patented technology

Method and system for predicting ship motion or the like to assist in helicopter landing

A method for a short-term prediction of future ship motion in open water to furnish visual cueing information that can be remotely presented to a pilot during an aircraft landing is described. Two sets of samples of the sea surface geometry along a radial azimuth line from a ship as a function of elevation of a sensor are first acquired. These are compensated to remove the components due to the ship's motion. Two wave traces are then separately derived in Cartesian format from the two sets of acquired samples. These wave traces are subjected to a Fast Fourier Transform to detect the amplitudes and phases of the individual wavelength components. The direction of the wavelength components is determined using a measure of their phase change in the scan direction during the time interval between the two scans together with their measured wavelength. The amplitude, direction and phase of each component is utilized together with the known motion characteristics of the moving ship in order to derive a short-term prediction of future ship motion in the time domain. A quiescent period of the ship motion is located by comparing the short-term prediction with the pre-defined operating limit criteria. Finally, a message signal is transmitted to the pilot of the aircraft indicating Time-to-Land and the duration of the quiescent period.
Owner:LOCKHEED MARTIN CORP

Wave, wind and light comprehensive electricity generation ship on sea

The invention discloses a wave, wind and light comprehensive electricity generation ship on the sea in the technical field of development and utilization of ocean renewable energy sources. Floaters are installed on the two sides of a hull respectively, the floaters vibrate up and down under the action of waves, and wave energy is firstly translated into mechanical energy and then translated into high-pressure energy of hydraulic oil through a hydraulic transition system; a perpendicular shaft wind machine is installed on a deck of the hull, wind rotors rotate under the action of blown wind, and wind energy is firstly translated into mechanical energy and then translated into high-pressure energy of the hydraulic oil through the hydraulic transition system; the hydraulic oil carrying the high-pressure energy works through impacting a hydraulic motor and drives a direct driven electric generator to generate electricity; a photovoltaic cell square matrix is installed on the deck of the hull to absorb solar energy and translate the solar energy into electric energy. The wave, wind and light comprehensive electricity generation ship solves the problems that electricity generation with ocean energy resources is high in unit cost, poor in stability and the like, and greatly improves competitive power of the development and utilization of the ocean renewable energy sources due to the high flexibility of a system.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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