18 results about "Shallow sea" patented technology

The invention provides a method for quickly establishing a three-dimensional near-seafloor speed model in a shallow sea area; the method comprises the following steps of extracting initial informationand extracting a common-center-point gather; calculating the slope of the initial travel time in the common-center-point gather; judging whether a shot point is located in the seawater layer or not,and if yes, correcting the shot point to the seafloor; calculating the speed and the depth of inflection points corresponding to respective offset distances; performing linear interpolation on the speed at each depth to obtain a one-dimensional speed model of the common center point; after all the common-center point domain gathers are processed, adopting the linear interpolation method, calculating the speed values of the rest grid points by utilizing the one-dimensional speed model of all common center points, and a speed model is output. By adoption of the method for quickly establishing the three-dimensional near-seafloor speed model in the shallow sea area, the influence of the seawater layer on ray propagation is overcome, and the influence of multiple excitation receiving modes on an inversion result is eliminated, and the problem that the conventional method needs to carry out multi-ray tracing forward modeling is avoided.

This invention relates to the field of underwater acoustic signal processing technology, and discloses a method for calculating the transmission time of multipath underwater acoustic signals based on a Markov model. The method includes: first, performing bandgap conditioning and correlation processing on the received underwater signal to extract the energy envelope, and mapping it to a likelihood distribution in the time delay domain to obtain multipath structure observation parameters; then, calculating the tidal period phase factor based on the signal acquisition time, and establishing a multipath state evolution model modulated by this phase factor; next, using the multipath structure observation parameters to drive the model for time-series recursion, calculating the confidence sequence of the first-arrival multipath cluster's belonging state; finally, using the confidence sequence as weights, performing a fusion estimation of the preset propagation delay corresponding to each state, and outputting a continuous transmission time. This invention can effectively suppress jump errors caused by the time-varying multipath structure due to internal tides, and significantly improve the stability and accuracy of transmission time calculation in complex shallow sea environments.

This invention discloses a portable sediment sampler with a multifunctional collection structure for shallow sea use. It includes a connecting cylinder with a T-shaped operating handle fixedly connected to its top. A connecting layer column is movably installed at the bottom of the connecting cylinder, and a sampling mechanism is fixedly installed at the bottom of the connecting layer column. The sampling mechanism comprises a vertical cylinder, a compression spring, a sediment sampling cylinder, a first slot, a second slot, and a folded cylindrical plate. The sampling mechanism also includes a sealing cylinder, a threaded ring, a filter cotton sheet, and a filter plate. This sampler can simultaneously sample seabed sediment and seabed water, and can separate the sediment from the seabed water. During use, the sampler can be fixed to the side plate of a small fishing boat using an N-type mounting bracket, an adjusting rod, and a pressure disc. Furthermore, during the deep-sea sampling process, the support mechanism effectively prevents the sampling mechanism from tilting. The sampler also has an anti-loss function.

The invention relates to a shallow sea equivalent earth sound model inversion method based on sparse Bayesian learning dispersion curve estimation, and the method comprises the following steps: 1, carrying out the time-frequency transformation of broadband sound source data received by a shallow sea vertical array, and obtaining multi-frequency-point and multi-snapshot frequency domain vertical array data; step 2, constructing a horizontal wavenumber hypothesis interval and a modulus depth function hypothesis space corresponding to each frequency point according to a water layer sound velocity profile and environmental prior information; and step 3, based on a normal mode sound propagation theory, frequency domain vertical array data of each frequency point is modeled as a weighted sum of each mode depth function in the mode depth function hypothesis space, and a weight vector is a horizontal wave number spectrum. According to the method, the sound field intrinsic characteristic, namely the dispersion curve, irrelevant to the sound source is directly extracted from the vertical array data, and an equivalent earth sound model concept is utilized, so that an earth sound parameter inversion scheme which is more stable, is more tolerant to model mismatch and can effectively avoid attenuation coefficient coupling influence is realized.

This invention relates to the field of optical water quality monitoring technology, specifically to a shallow sea monitoring system and method based on multimodal optical sensing and deep learning. The system includes an electric field excitation module for generating an alternating electric field with adjustable frequency and amplitude; an optical sensing module for generating characteristic luminescent signals under alternating electric field excitation; a visual acquisition module for capturing the characteristic luminescent signals and generating multispectral image data; an edge processing module for real-time processing of the multispectral image data and water quality parameter inversion; a wireless communication module for transmitting the processing results to a terminal device; a terminal presentation module for receiving data and providing visualization and early warning management; and an energy management module for dynamically scheduling power supply strategies based on environmental energy availability. This invention achieves the detection of multiple water quality parameters through alternating current electroluminescence technology, solving the problem of low integration in multi-parameter detection systems and reducing system complexity and maintenance costs.

The present application relates to the technical field of marine mineral resources exploitation equipment, and discloses an environment-friendly shallow clay mine mining device and method, which comprises a ship body, an extraction mechanism connected to the ship body, a supporting mechanism connected to the lower part of the extraction mechanism, a lifting mechanism connected to the supporting mechanism, and a mining mechanism connected to the lower part of the lifting mechanism. The present application adopts an internal-external differential speed self-adaptive stirring mechanism, an outer pot-lid-shaped self-adaptive stirring head drives flexible stirring blades to rotate, and the surrounding clay slurry is smoothly scraped to the central area. The internal rigid conical stirring head and the external stirring head form differential rotation, and the central slurry is forced to be stirred and broken through the spiral guide groove and wedge-shaped stirring fan blades, so that the problem of the "central dead water area" of traditional equipment is completely eliminated.

This invention provides a method for generating a seabed DEM based on large-scale nautical chart depth points and high-resolution remote sensing surfaces, belonging to the field of marine surveying technology. The method includes: acquiring discrete depth points from remote sensing images and nautical charts; extracting a relative depth trend surface based on a dual-band logarithmic ratio model; calculating the image gradient field and pixel-level structure tensor, solving for the principal eigenvectors, and constructing an anisotropic diffusion tensor by combining local gradient magnitudes; using the nautical chart depth points to perform regression calibration on the trend surface to generate sparse residuals, and establishing a residual calculation grid; using the anisotropic diffusion tensor as a guiding constraint, performing non-uniform diffusion calculation on the sparse residuals to generate a global continuous residual correction surface; superimposing the correction surface onto the trend surface, and obtaining the final seabed DEM through anomaly removal and edge smoothing. This invention solves the problems of low accuracy and loss of detail in complex shallow sea topography inversion.

The application discloses a shallow sea heavy mineral sand mine resource exploration method and related equipment, and the method comprises the following steps: obtaining pre-research data of a target shallow sea area, predicting an exploration scheme based on the pre-research data, and arranging a bottom seismograph in the target shallow sea area based on the exploration scheme; collecting passive source micro-motion data by using the bottom seismograph, and extracting original data from the passive source micro-motion data based on a preset data quality standard; constructing a horizontal and vertical spectral ratio curve based on the original data, performing frequency spectrum separation on the horizontal and vertical spectral ratio curve, and obtaining a low-frequency curve of a bedrock resonance peak; constructing a palaeotopographic map through bedrock surface depth inversion based on the low-frequency curve; obtaining a regional geological model of the target shallow sea area, superimposing and analyzing the palaeotopographic map and the regional geological model, and obtaining an evaluation result of heavy sand mine resource potential. The application can effectively improve the exploration directivity and the accuracy of resource potential evaluation by identifying the change of ore-controlling landforms, and can be widely applied to the technical field of data processing.

This invention provides a protective mobile unmanned surface vessel (USV) hyperspectral system for shallow sea pollution observation, belonging to the field of marine environmental monitoring technology. It includes an USV hull, hyperspectral observation equipment, a water sampling and detection device, and a controller. By installing a cabin and a hinged door on the USV hull, and housing the height-adjustable hyperspectral observation equipment, the system effectively protects the equipment when observation is needed. The door opens to extend the equipment from the cabin, and retracts it when observation is not required, then closes the door. The water sampling and detection device allows for timely and rapid sampling of polluted water, analysis of the samples, and output of results. This invention integrates hyperspectral observation and water sampling and detection, effectively protecting the hyperspectral observation equipment while simultaneously enabling sampling of polluted water, thus improving the effectiveness of pollution evidence collection.

This invention relates to a survey system based on reflected wave signals for searching for objects in aquatic bodies of water. Conventional seismic streamer methods have problems such as the difficulty of deploying and retrieving long cables, low flexibility in arrangement, and degradation of signal quality due to traction noise. This invention comprises a transmitting boat that emits survey waves and a plurality of receiving boats, each having a receiver. These receiving boats are controlled in a survey formation while physically unconnected, and survey data is generated by integrating the received reflected wave signals based on positional and time information. This allows for flexible changes in the arrangement of receivers to be linear or planar, and enables the efficient acquisition of high-quality survey data with a high signal-to-noise ratio in diverse environments, including shallow seas and narrow bodies of water.

This invention provides a pontoon auxiliary device and installation method for installing floating photovoltaic structures, belonging to the field of marine engineering technology. The pontoon auxiliary device has a frame, supporting components, and a pontoon. The floating photovoltaic structure can be connected to the pontoon auxiliary device as an integral structure through the supporting components. The frame can strengthen the strength of the floating photovoltaic structure. During transportation and installation, the frame mainly bears the force, avoiding deformation and damage to the floating photovoltaic structure. Furthermore, during installation, the pontoon can be used to adjust the draft of the floating photovoltaic structure, with less limitation by water depth, enabling operation in near-shallow sea areas.

This invention provides a method and system for shallow water depth inversion based on multi-temporal satellite imagery guided by laser bathymetry. The method includes: extracting water body pixels from Sentinel-2 imagery; extracting water depth photons from satellite-borne laser bathymetry data and performing refraction correction to obtain water depth values ​​along the orbital direction; utilizing the strong correlation between the water depth values ​​along the orbital direction and the reflectivity of the blue and green bands of Sentinel-2 imagery to calculate multi-temporal image fusion weights and generate a weighted fused image; based on water column layer-by-layer inversion and / or seabed classification inversion strategies, dividing the weighted fused image into multiple homogeneous regions according to the water penetration capabilities of blue and green light; using LLM and / or LRM to invert water depth layer by layer in the multiple homogeneous regions; and fusing the results of different regions through a buffer zone to obtain the water depth inversion result for the entire shallow sea area. This invention can achieve high-precision and high-stability shallow water depth inversion.

This invention relates to a method for measuring the acoustic absorption coefficient of the shallow seabed, comprising the following steps: measuring the seawater depth of the experimental sea area using an echo sounder; measuring the average sound energy density generated by rainfall using a hydrophone vertical array; measuring the rainfall intensity using a rain gauge; measuring the sound power radiated underwater by rainfall per unit area of ​​the sea surface; and calculating the acoustic absorption coefficient of the shallow seabed. The measurement method of this invention has a clear principle, and by measuring the underwater noise generated by rainfall, it can cleverly measure the acoustic absorption coefficient of the shallow seabed across the entire frequency band.

This invention relates to the field of deep-sea sampling technology, specifically to an in-situ, high-fidelity sampling device and method for shallow seabed sediments. The device includes a sampling cylinder with a sampling chamber at its lower end. A ball groove is formed through the lower end of the sampling chamber, and a ball valve is located inside the ball groove. A rotating shaft is fixedly connected to both ends of the ball valve, and a bevel gear is fixedly connected to one end of the rotating shaft. A motor is located on the inner edge of the sampling cylinder, and a bevel gear meshing with the bevel gear is fixedly connected to the output shaft of the motor. A pressure-reducing assembly is located at the upper end of the sampling cylinder. The pressure-reducing assembly includes a pressure-reducing cavity located at the upper end of the sampling cylinder, with multiple bladder walls inside the pressure-reducing cavity. A ball groove is formed at the lower end of the pressure-reducing cavity, and a ball valve is located within the ball groove. This invention stabilizes the in-situ pressure in the sampling chamber, preventing structural damage to the sample due to sudden pressure changes, and achieving in-situ high-fidelity sediment sampling.

This invention discloses a composite roadbed structure for shallow marine reclamation areas, relating to the field of land reclamation construction technology, aiming to solve the technical challenges of uneven settlement and reflective cracking in soft soil foundations in these areas. The structure provides rigid support through a pile foundation system embedded in the soft mud layer and innovatively employs support components with elastic restoring functions. Combined with a double-layer geogrid reinforcement and isolation system and a layered transition reinforcement layer, it forms a synergistic load-bearing system that combines rigidity and flexibility. This system effectively disperses loads, absorbs and reduces stress caused by differential settlement, and automatically adjusts its restoring function, thereby significantly suppressing the generation of reflective cracks in the pavement. This invention possesses excellent stability, adaptability, and durability, making it particularly suitable for rapid and efficient road infrastructure construction in shallow marine reclamation areas.

A modular adaptive shallow-sea trenching and cable laying integrated machine belongs to the field of marine engineering technology. It includes a frame, comprising a connecting frame and modular hinges; a trenching mechanism detachably connected to the frame for trenching on the seabed; a cable laying mechanism detachably connected to the frame and located behind the trenching mechanism for laying cables within the trenches created by the trenching mechanism; and a backfill guide plate movably connected to the frame and located behind the cable laying mechanism for guiding soil backfilling. The jetting mechanism of this invention is mounted on a sliding rail mechanism, which assists the jetting mechanism's movement on the seabed, thereby improving the efficiency and uniformity of trenching operations. The trenching baffle and connecting parts of this invention are height-adjustable, allowing the trenching depth of the V-shaped trenching baffle to be flexibly and precisely adjusted according to actual seabed conditions and burial requirements.

The present application relates to the technical field of provenance identification, and particularly relates to a method for identifying the material source of coastal and shallow sea zircon sand, based on multi-source sediment analysis, which comprises the following steps: S1: obtaining sediment samples in the coastal and shallow sea area, respectively performing heavy sand mineral separation and identification and chemical element analysis, and obtaining heavy sand identification data and element content data; S2: performing morphological analysis on zircon in the heavy sand identification data, obtaining morphological characteristic data of zircon, and simultaneously, constructing a sediment dynamic correction model and outputting corrected element content data; S3: inputting the heavy sand identification data, morphological characteristic data and corrected element content data into a provenance identification model, outputting the material source area of the coastal and shallow sea zircon sand, the contribution proportion of each source area, and identifying the sediment path system to which the material source area belongs. The present application improves the resolution capability of the material source area under multi-source mixed supply, and enhances the stability and adaptability of classification and identification.

The present application relates to a kind of shallow seabed environmental effects in-situ detection device and detection method, the detection device includes closed reaction kettle, geochemical detection system, data storage and transmission response system, central support plate, detection probe and multiple support probe;The closed reaction kettle is located at the top of central support plate;The detection probe and support probe are vertically connected to the bottom of central support plate;The geochemical detection system is used to detect the gas change of near-seabed water body in closed reaction kettle and the gas change and formation characteristics change in formation;The data storage and transmission response system is used to store and transmit the detection data of geochemical detection system.The shallow seabed environmental effects in-situ detection device provided by the present application can be placed by seabed insertion, and the near-seabed water body and shallow seabed formation are in-situ detected by geochemical detection method, which can provide early warning technical support for seabed environmental effect abnormal change.