128 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.

The invention provides a random forest shallow sea sediment classification method based on multi-temporal remote sensing image fusion, and relates to the technical field of sediment information extraction. Comprising the following steps: 1, collecting and preprocessing multi-temporal image data to obtain remote sensing reflectivity; 2, the water depth of each single-time-phase image is inverted, and the optimal water depth is obtained; 3, calculating bottom reflectivity characteristics of blue and green wave bands based on the optimal remote sensing image; 4, respectively calculating topographic features and spectral features based on the optimal water depth and the optimal remote sensing image; and 5, in combination with the bottom reflectivity features, the topographic features and the spectral features, carrying out random forest feature optimization and classification model training, and generating a substrate classification result. On the basis, the method solves the problems that an existing remote sensing image substrate classification method is insufficient in feature consideration, noise in a single-time-phase image can cause low classification precision, and therefore negative effects can be generated on accurate acquisition of substrate information.

The invention discloses a shallow sea area water depth inversion method based on a satellite-borne laser radar, and particularly relates to the technical field of single-photon water depth information extraction. The denoising method comprises the following steps: S1, data preprocessing: reading data, carrying out visual presentation, dividing photons into offshore photons, sea surface photons and undersea photons, and intercepting an effective photon region; s2, coarse denoising: denoising the area intercepted in the step S1 by adopting a DBSCAN (Density Based Spatial Clustering of Applications with Noise) algorithm; s3, fine denoising: screening effective signals of sea surface photons by adopting a Gaussian fitting algorithm, removing sea photons, separating subsea photons from the sea surface photons, performing density analysis on the subsea photons, extracting a density peak point, and constructing a density trend curve of the subsea photons by adopting a cubic spline interpolation method, eliminating residual noise deviating from normal distribution according to the trend curve; and S4, performing water depth inversion: performing refraction correction on the subsea photons subjected to fine denoising, fusing the corrected subsea photons and the sea surface photons subjected to fine denoising, and generating a water depth distribution diagram of the shallow sea area.

The invention discloses an active and passive fusion water depth inversion method based on adaptive spectrum weighting, and the method comprises the steps: carrying out the atmospheric correction of a multispectral satellite image, extracting a target region, and removing a land region and a deepwater region; the method comprises the following steps: acquiring a seawater point cloud of a satellite-borne photon counting laser radar in a target area, extracting sea surface and seabed information, and performing refractive index correction and tide correction to obtain a reference water depth; matching each pixel in the multispectral satellite image with a reference water depth, and dividing the multispectral satellite image into a reference pixel and a to-be-measured pixel; according to the spectral value of the multispectral satellite image, the Euclidean distance between each to-be-measured pixel and all reference pixels is calculated, and the reciprocal of the distance is used as the weight of each reference pixel; and introducing a weight-to-weighted least square method, and fitting a relationship from the spectral value to the water depth for each pixel to be measured to realize water depth inversion of the pixels to be measured. The method can effectively improve the active and passive fusion water depth inversion precision when the water depth distribution is uneven and the shallow sea area environment is complex.

The utility model discloses a shallow sea seaweed planting platform and relates to the technical field of marine ecological restoration. Comprising a traction ship, an offshore platform, a mesh belt reel, a seed mesh belt, compression rollers, degradable nails and supporting rods. The traction ship is connected with the offshore platform and can drive the offshore platform to move; the mesh belt reel is fixedly mounted on the offshore platform, the seed mesh belt is wound on the mesh belt reel, and the degradable nails are used for fixing one end of the seed mesh belt on the seabed in a needle pricking manner; one end of each supporting rod is in hinged connection with the offshore platform through a fixed hinge point, so that the supporting rods can rotate around the corresponding hinge points, the supporting rods rotate in a plane, and the net belt reel and the rotating plane are coplanar; and a compression roller is arranged at the other end of the supporting rod and can rotate on the corresponding end point of the supporting rod. The planting efficiency is improved, manual operation is partially replaced, and the operation process is simplified.

The invention belongs to the technical field of offshore wind power. According to the TLP floating type draught fan for the shallow sea and the stabilization control method, a draught fan body is fixed to a steel tower, the steel tower is fixedly connected to a truss type tower barrel, the bottom of the truss type tower barrel is connected with a plurality of height-variable floating barrels, and adjustable tension keys are connected to the bottoms of the height-variable floating barrels; the height-variable buoy comprises an inner barrel and an outer barrel, the inner barrel is located in the outer sleeve, and the jacking mechanism is arranged at the bottom in the outer barrel to drive the inner barrel to move up and down; a damping bin is arranged in the inner cylinder, the outer side wall of the damping bin is connected with the inner side wall and the inner bottom wall of the inner cylinder through elastic pieces, and the damping bin is connected with a liquid supply device through a pipeline so as to increase liquid when the floating body exceeds a set angle; wherein the floating body is a combined body of a plurality of height-variable floating barrels; the overall load is reduced while the supporting strength is guaranteed, and the device adapts to the limited water depth working condition of the shallow sea.

The invention relates to the technical field of marine hydrographic survey, and discloses a shallow sea full-profile ocean current information acquisition method based on data fusion, which comprises the following steps of: performing bidirectional dual acoustic detection on a shipborne measuring unit and a bottom-supported measuring unit, and acquiring and comparing respective acoustic channel transfer functions; the ocean current effect is quantified by analyzing symmetry breaking of the transfer function, meanwhile, channel disturbance characteristics of the water body environment are recognized, then the disturbance characteristics serve as dynamic constraints to guide data fusion, and an accompanying confidence coefficient index is generated for fused ocean current information. According to the method, an analysis core is changed from a measurement result to an acoustic channel bearing information, self-consistency verification is carried out on the measurement process while the flow velocity is obtained by analyzing the symmetry of channel response, and real flow field change and environment disturbance artifacts are distinguished from the physical principle, so that a blind area of data confidence in the prior art is avoided, and the accuracy of flow velocity measurement is improved. Measurement and diagnosis are integrated.

An offshore hydrogen production platform hydrogen production equipment cooling system comprises a gas-liquid treater, a hydrogen purification device, a chilled water machine, a hydrogen compressor and a hydrogenation machine, an inlet of the gas-liquid treater is connected with an electrolytic bath, and an outlet of the gas-liquid treater is sequentially connected with a hydrogen passivation device, the hydrogen compressor, a buffer gas tank, the hydrogen compressor, a hydrogen storage tank and the hydrogenation machine. The hydrogen adding machine is communicated with the hydrogen-powered ship and provides hydrogen for the hydrogen-powered ship, and the refrigerating unit is connected with the hydrogen passivating device through a pipeline to form a circulating pipeline. Aiming at the characteristics of offshore and shallow sea areas and a fixed hydrogen production platform, when hydrogen production equipment is cooled, required fresh water is provided through cooling of the air cooling radiator arranged on the main deck of the platform, so that the situation that seawater with poor cleanliness in the offshore and shallow sea areas flows through a plate heat exchanger to cool the fresh water to be provided is avoided; the cooling efficiency is improved.

The invention discloses a reverberation suppression method and device for shallow sea distributed scene feature learning. The method comprises the following steps: obtaining a target platform tensor for each target platform; constructing a corresponding deep expansion network for each target platform tensor; for the deep expansion network of the current target platform tensor, after parameter initialization is carried out by using a spectrum method, obtaining the hyper-parameter of the current deep expansion network based on the high-order singular value decomposition training of self-supervised learning; performing low-rank sparse decomposition on the deep expansion network of the current target platform tensor and the deep expansion network of the adjacent target platform tensor by using the current deep expansion network hyper-parameter; a current deep expansion network hyper-parameter is used as an initial hyper-parameter, a hyper-parameter of a deep expansion network of a non-adjacent target platform tensor is obtained based on high-order singular value decomposition training of self-supervised learning, and then low-rank sparse decomposition is performed. The method can be applied to shallow sea distributed scenes and has high-precision reverberation suppression.

The utility model discloses a depth-adjustable seawater quality sampling device which comprises a submersible, a remote control module and a positioning module are arranged in the submersible, the depth-adjustable seawater quality sampling device further comprises a sampling mechanism, and the sampling mechanism is arranged on the submersible; according to the depth-adjustable seawater quality sampling device, through the first remote ball valve and the second remote ball valve, on-off of water flow can be accurately controlled, the water flow can be conveniently controlled at different stages, then the internal pressure of the sampling shell is controlled, and through cooperation with the one-way valve, water flow backflow can be prevented, and it is guaranteed that seawater flows in the preset direction; according to the invention, mixing of water samples at different depths is avoided, the sampling accuracy is ensured, the underwater propeller rotates to generate water flow, and the first one-way drainage valve is matched, so that the previously stored relatively shallow sea water can be drained to the outside, stratified sampling of sea water at different depths is facilitated, and the sampling accuracy is further improved.

The invention discloses a compact and easily-controlled shallow sea buoy hydraulic system and a working method thereof. The system comprises a telescopic rod, a piston, an inner oil tank, a first one-way valve, a second one-way valve, a gear pump motor set, a normally-closed two-position two-way reversing valve and an outer oil bag. The piston is arranged in the inner oil tank, connected with the telescopic end of the telescopic rod and driven by the telescopic rod to do linear motion in the inner oil tank. The inner oil tank is provided with two oil ports, one oil port is connected to the outer oil bag through a first one-way valve, and the other oil port is connected with an oil outlet of the gear pump motor set through a second one-way valve. An oil inlet of the gear pump motor set is connected with one port of the normally-closed two-position two-way electromagnetic directional valve, and the other port of the normally-closed two-position two-way electromagnetic directional valve is connected with the outer oil bag. The system is compact in structure, only one electromagnetic directional valve and two one-way valves are used in use of the valves, and the number of elements and the size of the system are remarkably reduced.

The invention discloses a sea cucumber accurate fishing robot suitable for a shallow sea culture area, and relates to the technical field of aquaculture equipment.The sea cucumber accurate fishing robot comprises a rack, an equipment cabin, a collecting cabin, a power supply cabin and a plurality of propellers are installed on the rack, and a fishing mechanical arm matched with the collecting cabin is installed on the front side of the rack; a precise fishing framework is arranged in the equipment cabin, the precise fishing framework identifies the positions of sea cucumbers in the shallow sea culture area and controls the fishing mechanical arm to fish the sea cucumbers and then put the sea cucumbers into the collecting cabin, and a power supply unit is arranged in the power supply cabin to supply power to the precise fishing framework and the fishing mechanical arm. Through fusion perception, turbid water body image enhancement and accurate positioning, full-process autonomous accurate fishing of the sea cucumbers in the shallow sea high-turbidity environment is achieved, manual diving operation is replaced, the fishing efficiency and the product quality are greatly improved, and intelligent upgrading of the sea cucumber culture industry is promoted.

The application discloses a fish tail type tidal current energy power generation device, which solves the problem that the existing tidal current energy power generation device cannot be effectively applied to the near-shore shallow sea area, has the advantages of large sweeping area and high power generation efficiency, and has the technical scheme that the device comprises a first swing energy absorbing mechanism and a second swing energy absorbing mechanism; the first swing energy absorbing mechanism comprises a first cross arm, the end of the first cross arm is hinged to a first hydrofoil, and the first cross arm is connected with a first hydraulic pump and a first air pump; the second swing energy absorbing mechanism comprises a second cross arm, the end of the second cross arm is hinged to a second hydrofoil, and the second cross arm is connected with a second hydraulic pump and a second air pump; the first hydraulic pump is connected with a second hydraulic motor, the second hydraulic motor is connected with the second hydrofoil, and the second hydraulic motor drives the second hydrofoil to swing along the hinged position of the second cross arm; the second hydraulic pump is connected with a first hydraulic motor, the first hydraulic motor is connected with the first hydrofoil, and the first hydraulic motor drives the first hydrofoil to swing along the hinged position of the first cross arm.

The utility model relates to the technical field of ocean seawater detectors, and discloses a fixed seawater detector for a shallow sea area, which comprises a main body and a floating ball connected to the outer wall of the main body, and the bottom end of the main body is provided with a protective dismounting mechanism and an auxiliary filtering mechanism. The handle is pulled upwards to drive the positioning column to move and break away from the inner wall of the clamping positioning hole, clamping block limiting is relieved, then the connecting frame is rotated to drive the clamping block to move to the opening of the inserting groove, and then the connecting frame is pulled downwards to drive the outer wall of the clamping block to break away from the inner wall of the inserting groove, so that disassembly is completed. During mounting, the steps are reversely operated, so that the outer walls of the clamping blocks move relative to the positioning columns until clamping holes in the top ends of the clamping blocks move to the positions below the positioning columns, the clamping columns can be clamped to the inner walls of the positioning holes through springback of springs, and mounting is completed; the detector is prevented from colliding with coral reefs when the detector moves downwards along with sea waves to cause damage and influence on subsequent detection data.

The invention discloses a spherical dual-mode ocean energy collector, which adopts a transparent spherical shell structure to integrate a flexible amorphous silicon photoelectric assembly and a PZT piezoelectric assembly, and realizes light-vibration dual-mode energy collection and efficient management through an H-PSSHI circuit. The device has a dynamic self-balancing structure, is suitable for a shallow sea low-energy environment, can be seamlessly integrated on offshore facilities such as an anti-shark net buoy and the like, and realizes a self-energy-supply warning function. The design of light weight and high compatibility significantly reduces the deployment and maintenance cost, and provides an innovative solution for the integration of offshore renewable energy and safety early warning.

The invention provides a monitoring system and method for identifying sea surface oil spill by using a polarization state of light, and belongs to the technical field of beach shallow sea oil spill monitoring, and the system comprises a polarization data acquisition module which is used for acquiring polarization image data of a sea surface oil spill monitoring area; the data transmission module is used for transmitting the polarization image data of the sea surface oil spill monitoring area acquired by the polarization data acquisition module to the polarization data processing module; the polarization data processing module is used for analyzing and processing the received polarization image data of the sea surface oil spill monitoring area acquired by the polarization data acquisition module, carrying out primary identification on sea surface oil spill according to an analysis and processing result, and sending alarm information if the sea surface oil spill is identified to exist; and the control module is used for controlling operation and data processing of the monitoring system. According to the monitoring system and method for identifying the sea surface oil spill, the sea surface oil spill in the beach and shallow sea area is monitored based on the polarization state of light, and the oil spill identification capability can be remarkably improved.

The utility model provides a submarine cable protection device suitable for shallow sea, which comprises a plurality of protection modules sequentially arranged on a submarine cable along the extension direction of the submarine cable, and each protection module comprises a fixing unit, a buoyancy unit and a counterweight unit; the fixing unit is connected with a submarine cable; the buoyancy unit is connected to one end of the fixing unit close to the sea surface and used for driving the submarine cable to break away from the seabed; the counterweight unit is connected to the end, close to the seabed, of the fixing unit and used for preventing the submarine cable from displacing under the impact of sea waves. According to the utility model, the buoyancy unit is designed to drive the submarine cable to be separated from the seabed, so that friction generated by direct contact between the submarine cable and the seabed is effectively avoided, and the risk of damage to the submarine cable due to friction is greatly reduced. The buoyancy unit not only provides necessary buoyancy, but also ensures the stable suspension state of the submarine cable underwater, and prolongs the service life of the submarine cable.

The invention provides a shallow sea underwater terrain inversion method and system based on a video SAR, and belongs to the synthetic aperture radar signal processing field and the ocean remote sensing application field, and the method comprises the steps: obtaining multi-frame SAR data with sea wave characteristics in a shallow sea area based on the video SAR; registering the obtained multi-frame SAR data with characteristics in the shallow sea area to obtain a video SAR image; every two frames of video SAR images are uniformly divided into sub-image blocks in an overlapped mode, and the wave lengths and the wave velocities of the sub-image blocks are estimated respectively; inverting water depths corresponding to all the sub-image blocks by using a linear dispersion relationship to obtain multiple groups of underwater terrain inversion results; and fusing multiple groups of underwater topography inversion results, and taking the result as a final underwater topography detection result of the research area. According to the invention, more refined water depth inversion can be realized.

The invention discloses a shallow sea oil seismic exploration seabed node instrument deploying and retracting device and method, and the device comprises a pedestal, the upper end of the pedestal is provided with a fixed wheel assembly, and the upper end of the fixed wheel assembly is provided with an opening and closing wheel assembly; the number of the opening and closing wheel assemblies is consistent with that of the fixed wheel assemblies, and rolling assemblies are arranged in the opening and closing wheel assemblies and the fixed wheel assemblies. And the rolling assembly comprises a driving assembly and a tire which are connected in sequence. Mechanization of retracting and releasing of the seabed node instrument is achieved; on the premise of ensuring the safety, the ship can well control the retracting and releasing force and speed within a certain speed range when traveling, so that the arrangement, arrangement and recovery efficiency of shallow sea seismic exploration is improved, and the efficient, high-quality and safe operation of a seabed node instrument petroleum seismic exploration project is ensured.

The invention discloses an airborne ocean laser radar hierarchy and water bottom synchronous three-dimensional reconstruction method. The method comprises the steps of obtaining a three-dimensional point cloud of laser on a water surface according to airborne laser radar data; gridding is carried out on the three-dimensional point cloud of the laser on the water surface, multi-pulse averaging of spatial aggregation is carried out, and signals after gridding aggregation are obtained; and obtaining a water surface peak position, a level peak position and a water bottom peak position, and finally obtaining water bottom and level three-dimensional point clouds at the same time, thereby realizing high-precision three-dimensional reconstruction. According to the method, the thought of voxelized grids is combined, resolution sacrifice caused by multi-pulse averaging in a large space range is avoided, high-resolution three-dimensional reconstruction with adjustable resolution is achieved, a multi-target distinguishing algorithm architecture is designed, and the effect of multi-target simultaneous detection is achieved; the method has reference significance for shallow sea environment detection and shallow sea carbon cycle analysis, and has wide applicability.

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.

A mining area prefabrication system and method for deep sea mining test, the ship body of the water surface equipment system is provided with a feeder bin for storing ores, the bin is communicated with a mixer, the inlet of a mixing pump on the ship body is communicated with a water source through a mixing pipeline, a branch pipeline is arranged on the mixing pipeline between the mixing pump and the water source, the branch pipeline communicates the mixing pipeline with the outlet of the mixer, the ores from the bin pass through the mixer to enter the mixing pipeline to mix with water to form ore slurry, the outlet of the mixing pump is connected with a conveying pipeline, the end of the conveying pipeline is connected with a frame body, a control system is electrically connected with a driving mechanism and a positioning system on the frame body, and the feeder and the mixing pump on the ship body, accurate prefabrication of the mining area is realized, the uniformity of the distribution of the ores meets the requirements, the actual situation of the deep sea mining area is approached, the deep sea mining area can be simulated with high quality, the reliability of the deep sea mining system can be efficiently verified, the test time of the deep sea mining system in shallow sea test is shortened, and the determination of the test is improved.

The application discloses a kind of artificial source electromagnetic detection method and device in beach shallow sea area, storage medium, and will be placed in the land source and in seawater area observation, comprising: using high-power transmitter in the long wire transmission source of two ends ground sends bipolar step current;Bipolar step current is received in observation area to observe secondary field electromagnetic signal;Secondary field electromagnetic signal is carried out denoising processing to obtain high signal-to-noise ratio useful signal;High signal-to-noise ratio useful signal is carried out inversion processing to obtain the earth electrical structure in the predetermined depth range of measurement area.The technical scheme of the application solves the problem that it is difficult to carry out work in beach shallow sea area at present, and provides a powerful means for resource investigation and engineering investigation in beach shallow sea area.

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 the technical field of ocean engineering safety monitoring and evaluation, in particular to a shallow sea geological disaster recognition and pipeline stability evaluation method based on a light-scale intelligent model, and the method comprises the following steps: S1, constructing a shallow sea region disaster disturbance nested map; s2, performing disaster disturbance path identification and pipeline risk propagation modeling, and outputting a pipeline disturbance influence graph including disturbance transmission paths and node influence intensity; and S3, calculating the stability score of each pipe section, and outputting an unstable disaster source, a propagation path and an interference chain graph. According to the method, by constructing the response relation between the disaster disturbance propagation path and the pipeline structure, integrated expression of disaster influence identification, propagation modeling and stability evaluation is achieved, and the accuracy and interpretability of analysis of the influence of shallow sea geological disasters on the pipeline are improved.

The invention discloses a ship underwater water pressure field depth conversion method, which comprises the steps of constructing a ship electrostatic field conversion model based on a point charge model; the influence of the interface effect on a ship pressure signal under the shallow sea environment condition is equivalent to the influence of the interface effect on a ship corrosion related electrostatic field, and a model considering the influence of the medium effect on the ship electrostatic field is established; according to the electrostatic field model, a parallel equivalent source is constructed for a ship water pressure field along the longitudinal directions of a port and a starboard of a ship body based on a source-sink model, and a three-dimensional flow field problem is converted into an equivalent source model distribution problem; establishing a pressure signal inversion method of a point source on the basis of considering the influence of an interface effect on a ship pressure field signal and a source-sink model; the pressure signal model is solved, and then the pressure value of any field point is inverted; a multi-source coupling inversion system with physical interpretability is established, and the signal reconstruction precision under different water depth conditions is remarkably improved by introducing a constraint optimization algorithm; and the actual engineering requirements are met.

1. The name of the design product: shallow sea big data communication repeater (Tiantong repeater). 2. The use of the design product: for large data volume bidirectional data communication in marine environment. 3. The design points of the design product: in the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view 1.

The application discloses a digital equivalent source sound field reconstruction system based on an underwater complex sound field environment, and comprises the following modules: a sound pressure acquisition module that acquires radiated sound pressure data at a measurement point through a hydrophone array; an intelligent analysis module that, based on the radiated sound pressure data, derives a shallow sea sound pressure Green function by using a shallow sea Pekeris waveguide model, and constructs an underwater sound field equivalent source equation; a compressed sensing module that, based on the underwater sound field equivalent source equation, converts the underwater sound field equivalent source equation into a compressed sensing problem, and solves the compressed sensing problem by using an accelerated proximal gradient descent algorithm to obtain a compressed sensing equivalent source strength; and a sound field reconstruction module that constructs a free field Green function, and obtains underwater reconstructed sound pressure by combining the free field Green function with the compressed sensing equivalent source strength, so that the digital equivalent source sound field reconstruction of the underwater complex sound field environment is realized, the data processing efficiency is improved, and the demand for computing resources is reduced.

The application discloses a kind of radiation characteristics detection methods of target to be measured under shallow sea waveguide environment, comprising the following steps: step 1: according to the data received by vertical array, by orthogonal constraint mode search method, extract the real normal mode parameters of sound source radiation signal in shallow sea waveguide environment;Step 2: according to the real normal mode parameters, by normal mode expression in waveguide environment, the sound field of entire shallow sea waveguide is obtained by inversion;Step 3: obtain the sound field information required in the sound field of shallow sea waveguide, utilize reciprocity theorem to map sound source information to free space, realize the sound field migration from shallow sea waveguide to free space, and further obtain the radiation characteristics of target to be measured in free space.The method of the application is used to obtain the radiation characteristics of target to be measured in free space according to the data received by vertical array.

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.