39 results about "Ocean wave height" patented technology

The invention provides an undulatory sea surface ghost reflection suppression method and device. The undulatory sea surface ghost reflection suppression method comprises that based on an undulatory sea surface reflection coefficient calculation formula, the angular frequency, the wave number, the ocean wave height and the seawater speed which correspond to the obtained seismic data in a frequency-wavenumber domain are calculated to obtain a reflection coefficient; a white noise coefficient is obtained by calculating the angular frequency corresponding to the seismic data in the frequency-wavenumber domain; a ghost reflection suppression operator, of the frequency-wavenumber domain, corresponding to preset towing cable scanning depth is obtained by calculating the reflection coefficient and the white noise coefficient; frequency-wavenumber domain suppression data is obtained by means of the suppression operator; then the frequency-wavenumber domain suppression data is converted into time-space domain suppression data; the time-space domain suppression data is divided by a preset time window interval; the sum of absolute values of frequency domain data corresponding to the towing cable scanning depth in the same time window is worked out; and the time-space domain suppression data corresponding to the minimum sum of the absolute values serves as seismic data of the corresponding time window after ghost reflection suppression. According to the invention, undulatory sea surface ghost reflection can be effectively suppressed.

The invention provides a satellite-borne laser near-coast terrain detection laser radar and a detection method. The satellite-borne laser near-coast terrain detection laser radar comprises a laser, atransmitting optical light splitting device, a large-aperture telescope, a relay optical device, a multi-channel photoelectric detector, a laser controller, a signal acquisition and processing module,a signal conditioning and detector control module and a comprehensive controller. Parallel dual-wavelength laser emission is utilized, large dynamic detection of deep sea and shallow sea seabed echoes is achieved through large and small view field detection of 532 nm wavelength laser echoes, synchronous detection of the sea surface is achieved through 1064 nm echo detection, and therefore the near-coast seabed terrain and a water depth are accurately measured; atmospheric detection is realized through parallel dual-wavelength laser emission and polarization receiving detection; and through multi-beam laser emission and sub-view-field receiving detection, high-efficiency measurement of an ocean wave height and the near-coast land terrain is achieved, the laser radar is carried by a satellite platform, and global-scale near-coast terrain and water depth measurement can be achieved through continuous scanning in a satellite flight direction.

The invention discloses an ocean wave height measuring device comprising a power switch (1), an indicator lamp (2), a charging aviation plug (3), a handle (4), a knob switch (5), an antenna (6), a pin(7), a blade (8), an upper casing (10), an O-ring rubber ring I (11), a middle casing (12), a control plate (14), an O-ring rubber ring II (15), a rechargeable battery ( 16), a lower casing (17), a foam buffer head (18), a counterweight head (19) and a transmitting module (20). The ocean wave height measuring device has high resistance to water-entry impact and has a good wave-following performance when floating freely in seawater. A six-axis inertial sensor is used for calculation and processing to obtain wave height data, and the wave height data is transmitted through the transmitting module. The problem of high-precision measurement of wave height can be solved.

The invention discloses a deep learning-based sea wave height prediction method and application thereof, and the method comprises the steps: respectively inputting sea wave data information into an AM-LSTM model and a CatBoost model, obtaining and outputting P1 and P2, and reconstructing P1 and P2 according to the following formula to obtain a prediction sequence P; p = q2 * P1 + q1 * P2, w1 is the mean value of the MAE, the RMSE and the MAPE output by the AM-LSTM model, and w2 is the mean value of the MAE, the RMSE and the MAPE output by the CatBoost model. According to the sea wave height prediction method, the advantages of the LSTM in deep learning in the aspect of processing long-term data prediction, the characteristics of the attention mechanism and the characteristics of few parameters, fast training and difficult overfitting of the CatBoost are considered, the predicted data are reconstructed, the prediction precision is high, the generalization performance is high, the method is especially suitable for sea wave height prediction, and the application prospect is promising.

The invention provides a hydrofoil boat wave climbing control method and relates to the field of control strategies, specifically to a hydrofoil boat wave climbing control method. The hydrofoil boat wave climbing control method comprises the following steps of (1) establishing an ocean wave height sequence model and a predication sequence; (2) establishing a force and moment equilibrium linear equation; (3) measuring the height of a hull relative to a sea level; (4) calculating a deviation value of the hull following the waves; (5), judging hydrofoil water outlet and hull water striking situations; (6) designing a finite time-domain optimal control performance index, selecting a decision variable, calculating desired flap deflection angle needed by controlling, and controlling a longitudinal displacement height of a hydrofoil boat; and (7) repeatedly executing the whole optimizing process within an ocean wave period. According to the hydrofoil boat wave climbing control method, by forecasting an ocean wave sequence, a discrete segmental control method is designed to update control output in real time, and therefore, the hydrofoil boat tracks wave height change of a high ocean condition in time to reduce hydrofoil water outlet and hull water striking.

The invention belongs to the technical field of ocean wave height prediction, and discloses an ocean wave height prediction method and system, computer equipment, a storage medium, and a terminal. The method comprises the following steps: selecting a feature with a high correlation coefficient as an input feature for predicting an ocean wave height; establishing a chaos model according to particle swarm behavior characteristics to solve the problem of premature convergence of particle swarms, wherein the CDW performs optimization in an initialization stage for a BP model, and in a CPSO-BP model, a chaotic particle swarm optimization (CPSO) algorithm searches optimal particles in a solution space to optimize initial weights and threshold values of a BP network; using parameters optimized by the CPSO algorithm as initial weights and threshold values of an ELM network to be transmitted to an ELM network; carrying out wave height prediction in the ocean early warning field by using a CPSO-BP model or a CPSO-ELM model. The deep learning method is used for wave height prediction, and the method has the advantages of high accuracy, low cost and high operation speed.

The invention discloses a sea wave height prediction method. The prediction method comprises the following steps: carrying out VMD decomposition on an original sea wave height data sequence; inputting a plurality of discrete subsequences IMF1, IMF2,..., IMFk obtained through the VMD decomposition into an AM-LSTM model to obtain model prediction results PIMF1, PIMF2,..., PIMFk of the plurality of discrete subsequences; inputting the original sea wave height data into the AM-LSTM model to obtain a model prediction result PIMF of the original sea wave height data sequence; performing reconstruction calculation on the model prediction results PIMF1, PIMF2... PIMFk of the plurality of discrete subsequences and the model prediction result PIMF of the original sea wave height data sequence to obtain a final prediction value of the sea wave height, and evaluating the final prediction value.

The invention discloses a graphical display method for marine meteorological safety early warning. The method includes the steps: obtaining sea wave height forecasting and early warning information and wind field wind speed forecasting and early warning information of a target sea area; according to an electronic map of the target sea area, mapping the sea wave height forecasting and early warninginformation and the wind field wind speed forecasting and early warning information of the target sea area to corresponding positions of the electronic map; dividing the wind field wind speed into aplurality of wind speed grades, and setting corresponding colors for the wind speed grades; and mapping the colored wind speed grade information to the electronic map. According to the invention, thewind speed of the wind field is colored, so that a worker can determine the wind speed of the wind field everywhere in the target sea area more visually; and the sea wave height information and the wind field wind speed information of the target sea area are mapped on the electronic map, so that the worker can determine the specific sea wave height information and the wind field wind speed information, and can check the accurate information of a certain position on the map more conveniently and quickly, and the working efficiency is improved.

The invention discloses an ocean-wave height adaptive underwater communication system for a communication range-finding common optical system, belongs to the field of spatial laser communication, andaims at solving problems that the adaptive adjustment of ocean waves cannot be achieved in the prior art, a laser range-finding module and a communication module are independent, the size and weight are large, and the structure is complex. The range-finding light emitted by a laser range-finding emitter and communication light emitted by a laser communication emitter are combined by a two-in-one composite optical fiber into one light source for output, and then are outputted through one common zooming system, and are finally focused at a far-field sea level or at a specified laser breakdown depth position below the sea level. The range-finding light beam is reflected by the sea surface, and the laser range-finding receives the light signal and converts the light signal into an electric signal. The electric signal is transmitted to the data processing system for calculating the height of the sea level in real time, and then the information is fed back to a controller. The controller drives the motor to change the focal length of the common zooming system, thereby adjusting the focus position of the laser range-finding light beam and the laser-excited underwater communication light beam, and forming closed-loop control.

The invention discloses a real-time sea wave segmentation method and device based on an adaptive threshold frame difference method. The method comprises the following steps: acquiring a moving sea wave video sequence image of a target sea area; carrying out gray scale conversion on the moving sea wave video sequence image; carrying out differential operation on two adjacent frames of the obtainedgrayscale image; generating an adaptive threshold value according to the differentiated image; and according to the adaptive threshold, carrying out threshold operation to output a final sea wave segmentation image. The method is suitable for the work of binocular vision-based sea wave height measurement and three-dimensional reconstruction. According to the method, the moving sea waves can be rapidly segmented, the consumed time is short, the effect is obvious, the method can be applied to different scenes through application of the self-adaptive threshold value, the work of resetting the threshold value under different videos is reduced, and the method is simple, easy to program and implement, low in algorithm time consumption and real-time.

The invention relates to an energy collecting device for generating power through ocean energy. The energy collecting device is characterized by comprising a wave focusing unit and a water storage pool; the wave focusing unit comprises a wave gathering plate, hinges, a driving rod, a motor, a gradient controller, a horizontal supporting frame, a sliding groove, a sliding block and a driven rod; the wave gathering plate is connected with the driving rod and the driven rod through the hinges and is located above the horizontal supporting frame, and the gradient of the wave gathering plate is controlled through the gradient controller; the driving rod is connected with the motor through a rotating shaft; and the wave gathering plate and the horizontal supporting frame form a slope way with the slope angle capable of automatically increasing and decreasing, a sliding groove is formed in one side of the horizontal supporting frame, the sliding block is connected with the driven rod through the hinge, and the sliding block slides back and forth between the left end and the right end of the sliding groove under the effect of the driven rod. Automatic adjustment can be carried out according to the on-site and real-time ocean wave height and wave length, the ocean wave energy is obtained to the maximum degree, the overall efficiency and the total output of power generation of a power generator are improved, and the energy collecting device is suitable for replacing an existing energy collecting device of an overtopping type wave power generating device.

The invention discloses a method for smoothing output power of a direct-drive type ocean wave electric generator. On the premise of conducting direct electric generation through ocean wave energy, the purpose is realized that the power output by the electric generator is enabled to be smooth and steady through the method of adjusting the current iq of a shaft q of the electric generator, instead of additionally arranging electrical energy storage devices required by a regular ocean wave electric generation system. The prediction method of ocean wave heights based on an ARMA model is introduced to the calculation process of the ocean wave energy, the magnitude of the current iq of the shaft q of the electric generator is properly adjusted according to the work efficiency of the ocean wave electric generator, so that the process of converting the ocean wave energy into electric energy is enabled to be smooth and steady, and thus it is guaranteed that the output power of the ocean wave electric generator is enabled to be smooth and steady. According to the method for smoothing the output power of the direct-drive type ocean wave electric generator, on the one hand, the electrical energy storage devices required by the regular ocean wave electric generation system are omitted, and thus input cost is greatly reduced, on the other hand, the electrical energy quality output by the ocean wave electric generation system is improved, and the operation performance of parallel grid power transmission of a direct-drive type ocean wave electric generation system is improved.

The invention relates to a low-altitude flight pneumatic identification control method for dynamically correcting a reference trajectory, and belongs to the field of aircraft control. According to the method, the method comprises the steps: firstly, an autoregression model is designed to predict the sea wave height, and a flight height reference instruction introducing sea wave height dynamic prediction information is given; then the aircraft longitudinal dynamics model is converted into a speed subsystem and a height subsystem, and dynamic inverse control is designed for the speed subsystem; and backstepping method control is designed for a height subsystem, the problem of unknown aerodynamic characteristics caused by sea waves is considered, an aerodynamic function is converted into a linear parameterization form of multiplication of a known state vector and an unknown aerodynamic parameter vector, and an adaptive estimation law is designed to estimate unknown aerodynamic parameters. According to the pneumatic identification control method for designing the dynamic correction of the reference trajectory by considering the influence of sea waves, highly fine control is realized, and the method is of great significance to ultra-low-altitude sea-skimming penetration prevention.

The invention discloses a sea wave height detection method, device and apparatus and a storage medium. The sea wave height detection method comprises the following steps of: receiving a first echo signal returned by an emission source from a to-be-detected point at a first position, and receiving a second echo signal returned by the emission source from the to-be-detected point at a second position; determining a phase difference between the first echo signal and the second echo signal; and determining the height of the to-be-measured point according to the phase difference, the distance between the second position and the to-be-measured point and a first position parameter. The problem that sea wave height measurement accuracy is poor is solved; the accuracy and stability of sea wave height measurement are improved; and the use efficiency of ocean remote sensing measurement equipment is improved.