216 results about "Seabed sediment" patented technology

Disclosed is a sediment classification method and system based on bottom echo information of a deep-sea multibeam water column, falling within the technical field of seabed sediment classification. Multidimensional features of seabed multibeam time series are extracted by using multibeam water column data, and multidimensional features of seabed spots are constructed by fusing an angle response curve; double-waveform spectrum comparison of original sample point waveform with seabed measured point waveform is performed, and two groups of corresponding waveforms are matched by using Cosine Similarity to expand original sample points; and the reliability of classification results is improved. In the present disclosure, the transformation from hard to soft classification is realized, and the seabed habitat inversion of complex mixed sediment in a deep sea is further realized.

The invention relates to the technical field of marine ecology, in particular to an offshore wind power and marine ranch blue carbon synergistic effect optimization and scheduling control system which comprises a blue carbon dynamic monitoring module, a cross-time scale optimization module, an energy directional scheduling module, an ecological parameter compensation module and a synergistic effect feedback module. Wherein the blue carbon dynamic monitoring module is used for collecting an algae photosynthetic carbon sequestration rate, a shellfish calcification carbon sequestration rate, a seabed sediment carbon sequestration amount and environmental parameters in real time; the cross-time-scale optimization module is used for carrying out space-time alignment and generating a collaborative optimization strategy; and the energy directional scheduling module is used for dividing the electric energy output by the wind turbine generator according to priorities. According to the method, a blue carbon-wind power integrated collaborative optimization and scheduling mechanism is constructed, accurate alignment and dynamic regulation and control of different time scale carbon sink processes and wind power output are realized, and the collaborative capability of energy utilization efficiency and ecological carbon sink benefits is improved.

The invention discloses a seabed sediment classification method based on multilevel comparative learning and uncertainty measurement. The method comprises the following specific steps: dividing target backscattering intensity data to obtain a training set containing marked samples and unmarked samples and a test set containing marked samples; constructing a feature extraction model, and obtaining a multi-level fusion feature based on the training set; obtaining optimized feature representation based on multi-level comparative learning; screening based on the unmarked samples in the training set and the uncertainty measurement to obtain a target pseudo-tag sample; and carrying out joint learning based on the labeled samples in the training set and the target pseudo-label samples. According to the method, a high-quality pseudo label, namely a target pseudo label sample, is screened out through a pseudo label screening strategy based on uncertainty measurement, and the quality of the target pseudo label sample and the adaptability of model learning are ensured; and supervised and semi-supervised joint learning is carried out through the marked samples and the target pseudo-tag samples in the training set, unmarked samples are fully utilized, and the substrate classification performance is improved.

The invention relates to the technical field of a seabed substrate advanced detection device and method for a seabed mining vehicle, and provides a seabed substrate advanced detection device and method for a seabed mining vehicle, which can simultaneously obtain submarine topography and landform and detect multiple parameters of a seabed substrate. The deep sea detection system is matched with a mine car to ensure smooth proceeding of a rear mine car in deep sea bottom detection, and comprises a sea surface data processing system and a frame with the cross section in a structure shaped like a Chinese character'tian ', a master control device, a signal receiver and at least four detection modules arranged in a matrix are arranged on the frame, and the master control device is used for controlling the detection modules. The signal receiver is used for transmitting information of the detection module and the sea surface receiving device; the detection module comprises a side-scan sonar module used for rapidly obtaining the topography and landform in front, a transverse push toothed plate used for cutting into a soil body, a turbidity meter module used for measuring the concentration of suspended particles and dissolved matters in the seabed, and a pressing plate module used for obtaining the bearing capacity and the subsidence index of the seabed sediment.

The deep-sea mining trolley comprises a trolley body, a floating assembly, an adjusting assembly and a collecting assembly, the trolley body is suitable for moving in the seabed, the floating assembly is arranged on the trolley body and connected with the trolley body, the floating assembly is used for providing buoyancy for the trolley body, and the adjusting assembly is arranged on the trolley body and connected with the collecting assembly. The adjusting assembly is used for adjusting the posture and position of the vehicle body, the collecting assembly comprises a mounting frame, a crushing part, a spraying part and a collecting part, the mounting frame is arranged on the vehicle body and can rotate around the width direction of the vehicle body relative to the vehicle body, and the crushing part is arranged on the mounting frame and can rotate around the width direction of the vehicle body relative to the mounting frame; the spraying part and the collecting part are both arranged on the mounting frame, the collecting part is used for collecting the crushed seabed sediments, and the spraying part is used for spraying the crushed seabed sediments so that the crushed seabed sediments can be flushed into the collecting part, and the collecting part can conveniently collect the crushed seabed sediments. The deep-sea mining trolley has the advantages of being simple in structure, high in collection efficiency and the like.

The invention relates to the technical field of underwater construction engineering, and discloses an underwater foundation scouring protection range determination method, computer equipment, a storage medium and a program product, and the method comprises the steps: obtaining ocean current and ocean wave data, and survey data of a seabed where an underwater foundation is located; calculating the undisturbed Hiltz number of the basic far field, the seabed sediment starting critical Hiltz number and the flow-wave ratio; according to the undisturbed Hiltz number of the basic far field, the seabed sediment starting critical Hiltz number and the relation between the flow-wave ratio and the scouring range, a correlation model is established; according to the method, analysis is conducted from sediment dynamics and hydrodynamics theories, the analysis method is clear in theory, high in applicability, accurate and reliable in analysis conclusion, clear in mechanism and more scientific, and an effective evaluation method can be provided for engineering designers; and the method can be used for calculating the scour protection range of the sandy soil and clay seabed under the wave-current coupling effect, and the universality is high.

The invention belongs to the technical field of sample collection, and particularly relates to a seabed sediment columnar sample collection device and method. The collecting device comprises a rectangular-ambulatory-plane-shaped bearing base, bearing frames are installed on the bearing base, the multiple bearing frames are jointly connected with a circular base disc located at the center position above the bearing base, a pressure relief sampling mechanism is arranged on the circular base disc, and a height difference exists between the circular base disc and the bearing base. The pressure relief sampling mechanism comprises a circular sampling tube, and an opening of the sampling tube faces the bearing base and is coaxial with the circle center of the circular basal disc; a sawtooth annular disc with the same shape and size as the sampling tube is also mounted at the opening of the sampling tube. According to the invention, the unsmooth sample removal caused by large friction force between the inner wall of the sampling tube and a sample can be avoided through the removal-assisting molding device, so that the sample can be removed smoothly and completely, the sample removal difficulty of the sample is reduced, and the use effect of the device is improved.

The utility model relates to an electrical system for a submarine sediment acoustic in-situ measurement device, which belongs to the technical field of submarine measurement electrical control and comprises a shipborne part and an underwater part which are connected through a photoelectric composite cable. The shipborne part is used for controlling the work of the underwater part; wherein the underwater part comprises a plurality of modular units which are connected through standardized interfaces, and the modular units comprise a main control unit, an acoustic measurement unit, a power amplifier unit, a transducer unit, a hydrophone unit and a power supply unit. According to the electrical system for the acoustic in-situ measurement device for the submarine sediments, through modular design, the adaptability and universality of the electrical system are improved; and moreover, a worker can add corresponding units or modules according to measurement requirements, so that the expandability of the system is improved, and different measurement scenes and requirements are better met.

The invention discloses a submarine sediment detecting and sampling device and a working method thereof, and belongs to the field of marine sediment sampling. The submarine sediment detecting and sampling device comprises an underwater propeller, an underwater walker and a detecting and sampling device which are sequentially arranged from top to bottom; the detection sampler comprises a supporting frame, an insertion driving air cylinder fixed to the top end of the interior of the supporting frame and an equilateral triangle mounting plate fixed to the bottom end of a piston of the insertion driving air cylinder, and a sampling pipe is fixed to the center of the equilateral triangle mounting plate. A temperature gradient detection assembly, a salinity gradient detection assembly, an acoustic detection assembly and a GPS positioning assembly are respectively fixed at the corners of the equilateral triangle mounting plate, and a bubble detection assembly is also fixed on the equilateral triangle mounting plate. By adopting the submarine sediment detecting and sampling device and the working method thereof, a plurality of areas can be detected after the submarine sediment detecting and sampling device is put once, the detection efficiency is improved, and the detection cost is reduced.

The invention discloses a natural gas hydrate generation accelerant containing amino acid and nano calcium carbonate as well as a preparation method and application of the natural gas hydrate generation accelerant, and belongs to the technical field of natural gas hydrates. The problems of low natural gas hydrate forming rate, low gas storage density, low natural gas recovery efficiency, poor environmental protection property and the like in the prior art are solved. The accelerant is obtained by taking a hydrophobic amino acid solution as a base solution, adding nano calcium carbonate into the base solution and adjusting or not adjusting the pH value. By regulating and controlling the type and the concentration of a base solution in the accelerant, the hydrate formation rate and the gas storage density are improved, and the induction time of hydrate generation is shortened; nanoparticles in the accelerant are small in particle size and large in specific surface area, so that disturbance and convective heat transfer of the accelerant are enhanced; in addition, the chemical components of the nanoparticles in the accelerant and the main component of the seabed sediment with a large amount of natural gas hydrate in the nature are calcium carbonate, the environmental risk is reduced, and the calcium carbonate and hydrophobic amino acid are wide in source and environmentally friendly.

The utility model relates to the technical field of ocean underwater geological exploration sampling equipment, and discloses a seabed sediment sampler capable of simultaneously realizing orderly water inlet and outlet, which comprises a placing frame, a plurality of sampling tubes, a plurality of sampling tubes and a plurality of sampling tubes, the connecting seat is arranged on the inner side of the sampling barrel and is matched with the sampling barrel to form a sampling area in the sampling barrel; the connecting piece is arranged on the connecting seat, and a certain distance is formed between the connecting piece and the connecting seat; the water inlet one-way valve assembly is arranged on the connecting base and is used for being opened during diving, seawater enters the sampling area, air in the sampling area is discharged, and it is guaranteed that the sampling barrel is not burst due to the pressure difference. According to the seabed sediment sampler capable of achieving orderly water inlet and outlet at the same time, orderly water inlet and outlet can be achieved, when submersible devices including a manned submersible device and a remote control unmanned submersible device operate underwater, seabed sediment can be smoothly obtained, and other preparatory work is reduced.

The invention provides a bottom-sitting type seabed sediment acoustic in-situ measuring device based on an autonomous underwater vehicle, and belongs to the technical field of underwater measurement, the bottom-sitting type seabed sediment acoustic in-situ measuring device based on the autonomous underwater vehicle comprises a mounting frame, a pressure-resistant cabin, an electric cylinder and a transmitting transducer, the top of the mounting frame is used for mounting the autonomous underwater vehicle, the bottom of the mounting frame is used for mounting the measuring device, the pressure-resistant cabin is fixedly mounted at the bottom of the mounting frame and used for supplying power to the measuring device and communicating with the outside, and the electric cylinders are fixedly connected with the bottom of the mounting frame and located on the two sides of the pressure-resistant cabin. The transmitting transducer is used for receiving a signal of the pressure-resistant cabin and detecting the sediment needing to be detected when the autonomous underwater vehicle is idle, and the transmitting transducer is located at the bottom of the mounting frame, fixedly connected with the mounting frame and used for transmitting a signal; the submarine sediment acoustic in-situ measurement device and the autonomous underwater vehicle can be combined together, the size is small, and use is flexible and convenient.

The present invention belongs to the field of embedded control technology, and relates to an embedded controller and a control method. An embedded controller suitable for an in-situ measurement system of acoustic characteristics of seabed sediments, comprising an embedded core board and a data acquisition control board; the embedded core board is used for communication control, data storage and analysis; the data acquisition control board is used to control sensor data acquisition and the opening and closing of peripheral switches. The embedded controller of the present invention uses a dual-control method of a CPU processor and a single-chip microcomputer to divide the core functions of the embedded controller, which not only utilizes the advantages of the powerful multi-task concurrent processing function of the embedded core board with an integrated high-speed processor and a transplanted Linux system, but also utilizes the advantages of the data acquisition control board with an integrated single-chip microcomputer with excellent real-time single control task performance, fast response time for data acquisition and signal judgment, and timely execution of control functions, so that the embedded controller solves the shortcomings and defects of the existing technology such as the unstable operation, high power consumption, long response time for control function execution, and inability to perform application function expansion such as visual control of the traditional in-situ measurement control system of acoustic characteristics of seabed sediments.

Belonging to the field of marine resource exploration equipment, the invention relates to a portable pressure maintaining gravity sampler, which comprises an extraction hole, an empennage, a counterweight, a connecting piece, a control piece, a large spring, a control mechanism shell, a positioning block, a release pipe, a small spring, a spacer pin, a sliding pipe, a pressure maintaining pipe, a closed ring, a mandrel, a flap valve, a check valve ball, a sampling pipe, a one-way flap, a tool bit, a drain hole, a limiter and a pipe body. According to the design scheme, the sampler is provided, through the design of the control mechanism shell, the pressure maintaining pipe and the sampling pipe, a light-weight pressure maintaining structure is provided, and complex pressure compensation or a hydraulic system is not needed; in addition, a sealing and pressure maintaining device is optimized, the in-situ pressure of the seabed sediment can be stably maintained so as to guarantee the integrity of the sample, meanwhile, the operation process of the sampling process is simplified, the manufacturing cost and the fault risk are reduced, and the dual requirements of marine geological research, mineral resource exploration and other scenes for high-quality samples and efficient operation are met.

The invention belongs to the technical field of seabed exploration, and particularly relates to an anti-sloughing hole seabed drilling sampling device suitable for loose sediments, which comprises a suspension platform, a double-pipe isolation sampling assembly and a loading assembly, a group of brackets are uniformly distributed on the surface of the suspension platform; the double-pipe isolation sampling assembly comprises a supporting pipe on the outer layer and a sampling pipe on the inner layer; a group of guide rods are uniformly distributed at the top of the supporting pipe; the guide rod penetrates through the suspension platform and is in sliding connection with the suspension platform; the upper end of the guide rod is fixedly connected with a stress plate; the stress plate is hammered intermittently through the loading assembly, the supporting pipe is promoted to be inserted into the seabed sediment, then the supporting pipe can play a role in supporting and enclosing the surrounding sediment, the hole collapse phenomenon in the sampling process is prevented, then the sediment in the supporting pipe is collected layer by layer through the sampling pipe, stratified sampling operation is achieved, and the sampling efficiency is improved. And disturbance to the sediments in the supporting pipe can be reduced to the greatest extent in the operation process, so that an almost original sediment sample can be obtained.

The invention relates to a seabed sediment intelligent discrimination method based on active target echoes, and the method comprises the following steps: 1, building different types of seabed sediment echo simulation data sets based on a normal wave model; step 2, constructing a seabed sediment classification network model; establishing a mapping relation between the echo data and the type of the seabed sediment by using a neural network; step 3, training the seabed sediment classification network; and 4, preprocessing actual echo data to be predicted according to the same preprocessing mode, and inputting the data into the network to obtain an estimation result of the type of the seabed sediment. According to the method, the normal wave approximation under the distance-independent shallow sea waveguide condition is utilized, the seabed sediment needing to be represented by a plurality of parameters is simplified to be represented by a single parameter of the normal wave number capable of being propagated in the waveguide, the parameter quantity is greatly simplified, and the automatic classification of the seabed sediment is realized by utilizing the deep learning technology.

The invention relates to a bionic rotifer preying wheel disc type composite underwater target collection device and method, the collection device comprises an underwater robot and a bionic collection head, and the underwater robot is provided with a high-definition camera, a foresight sonar, an adjustable highlight LED underwater lighting lamp and a seabed in-situ metal measurement sensor; the bionic collecting head is provided with a bionic roller wheel and a conveying pipeline; the conveying pipeline is of a Venturi tube type conveying structure, and bionic protruding structures are arranged on the surfaces of the bionic roller wheels. The bionic roller wheels are coaxially connected with rotating output shafts of the waterproof driving motors correspondingly, and the waterproof driving motors drive the bionic roller wheels on the two sides of the conveying pipeline to rotate and vibrate relatively. Disturbance on a seabed sedimentary layer and influence on a seabed ecological environment can be reduced, so that collecting mechanical parts are not easy to damage in operation, the service life is prolonged, and the safety and the accuracy are improved; seabed ocean current disturbance is reduced, and an acquisition path is accurately controlled; energy consumption is reduced, jamming is avoided, sampling efficiency is improved, and the application range is widened.

The invention provides a disposable submarine sediment acoustic characteristic in-situ measuring instrument, which belongs to the technical field of geophysical detection equipment and consists of a disposable part and a floating part. The throwing and abandoning part comprises an acoustic probe rod, a counterweight and a fusing separation mechanism, so that the instrument sinks and is in contact with the seabed; the floating part comprises a battery cabin, a fusing cabin, an electronic cabin and a buoyancy module and is used for controlling, data collecting and floating. The acoustic probe rod is provided with a receiving transducer, the counter weight provides gravity needed by sinking, and the fusing separation mechanism achieves separation of the throwing part and the floating part. The battery cabin provides a power supply, a fuse is arranged in the fusing cabin, and the electronic cabin comprises an electronic device, an underwater wet plugging connector and the like. The buoyancy module controls the sinking posture of the instrument and data transmission in the upward floating process through the empennage and the antenna. The measuring instrument solves the problems that an existing disposable measuring instrument cannot measure the acoustic characteristics of seabed sediments, the sinking process is unstable, and floating separation is unreliable.

The invention belongs to the technical field of marine geological exploration, and discloses an experimental device for observing penetration sampling disturbance characteristics of seabed sediments and a use method, and the experimental device comprises a bearing mechanism and a force storage penetration mechanism. The bearing mechanism comprises a containing part, the containing part is configured to contain a sample, the force storage injection mechanism comprises a lifting driver, a sampling assembly and a force storage part, the lifting driver can drive the sampling assembly to ascend and descend, the sampling assembly comprises an adsorption part and a sampling part, the adsorption part is configured to selectively adsorb or release the sampling part, and the force storage part is arranged on the sampling part; when the adsorption part adsorbs the sampling part, the elastic potential energy of the force storage part can be accumulated through the rising of the sampling part, and when the adsorption part releases the sampling part, the force storage part can drive the sampling part to penetrate into the sample in the accommodating part. By means of the arrangement, the experimental device for observing the injection sampling disturbance characteristics of the seabed sediment can improve the experimental accuracy, and the experimental requirements of different injection speeds of the sampling piece are met.

The invention relates to the technical field of marine acoustics, in particular to a multi-criterion selection method for a complex marine environment sound field calculation model, which comprises the following steps: S1, acquiring environmental parameters of a target sea area; s2, judging whether the terrain is horizontally changed, whether the seabed sediment is horizontally changed and whether the sound velocity profile gradient is horizontally changed according to the environmental parameters, if the terrain is horizontally unchanged, the seabed sediment is horizontally unchanged and the sound velocity profile gradient is horizontally unchanged, judging that the sound field environment level is unchanged, otherwise, judging that the sound field environment level is changed; and S3, selecting a model according to whether the sound field environment level is changed or not, if the sound field environment level is unchanged, selecting a shallow sea smooth average sound field model or a deep sea generalized phase integral model WKBZ according to a sea depth threshold value, and if the sound field environment level is changed, selecting a parabolic equation model RAM or a ray model BELLHOP according to a terrain type and a frequency threshold value. Through a multi-criterion selection method, scientization and engineering of complex marine environment sound field calculation model selection can be realized.

The invention relates to the field of seabed sediment classification mapping, and provides a seabed sediment classification mapping method based on shallow stratum profile data, which comprises the following steps: acquiring sensor data of a target seabed, including multi-beam topographic data, side-scan image data, seismic data and shallow stratum profile data; multi-dimensional acoustic-terrain-seismic features are constructed, acoustic feature matching is carried out on multi-beam terrain data and side-scan image data, seismic data are introduced, and an extended hierarchical model is constructed; constructing a preliminary submarine topography model diagram by using a spatial interpolation algorithm, repairing a preliminary missing region by using a generative adversarial network, generating a complete submarine topography model diagram, embedding multi-dimensional acoustic-topography-seismic features, and predicting a sediment migration trend; and generating a seabed substrate classification planar graph and a three-dimensional geological profile map, and performing seabed substrate classification mapping in combination with a sediment migration trend. According to the invention, the resolution and integrity of the submarine topography model can be significantly improved, and the dynamic classification map reflecting the current and future patterns is generated.

The invention provides a method for evaluating and predicting the internal erosion resuspension amount of submarine sediments under the action of waves, which is based on a mass conservation equation, an erosion constitutive equation and a seepage continuity equation of sediment particles and considers the influence of accumulation of seabed pore water pressure on the internal erosion process of the sediments under the action of the waves. Meanwhile, the influence of seabed soil physical property change caused by internal erosion on the seabed accumulated pore water pressure development process is considered, a seabed accumulated response-internal erosion coupling mathematical model under the wave action is constructed, and a finite element method is used for solving; and the development change of the accumulated pore water pressure, the porosity, the suspended fine particle volume concentration and the eroded fine particle mass of the seabed is obtained. According to the method, the mass of fine particles in the seabed sediment moving outwards along with seepage under the action of waves and the spatio-temporal evolution characteristics and rules of the erosion process in the sediment are quantitatively evaluated, and therefore quantitative prediction analysis can be conducted on the seabed stability and the erosion resuspension characteristics in the seabed sediment.

The invention discloses a rectification system which comprises a plurality of unit modules used for arranging water flow into laminar flow, and the unit modules are arranged in a layered mode in the vertical direction. The invention further discloses a seabed sediment and underflow simulation device which comprises a flow generation system, a rectification system and an experiment pool which are communicated in sequence. The flow generation system pushes water to generate water flow, the water flow is sorted into laminar flow through the rectification system and then input into the experiment pool, and a seabed sediment simulation layer is laid at the pool bottom of the experiment pool. By arranging the unit modules, water flow can be arranged into laminar flow, so that the laminar flow is closer to real seabed underflow, and the simulation degree of the real seabed sediment plume diffusion process is improved. Meanwhile, the unit modules are arranged in a vertical layered arrangement mode and are horizontally arranged, so that water flow discharged by each unit module is located at different heights, and each path of water flow diffuses in the horizontal direction at different heights, mutual interference between different water paths can be effectively reduced, and turbulent flow and vortex are prevented from being generated again.

The invention relates to the technical field of ocean monitoring, and particularly discloses a transducer array-based seabed sound velocity gradient in-situ measurement device, which comprises a transducer array unit, a depth adjusting unit, a transmitting and receiving control unit and a data processing unit, the transducer array unit comprises a plurality of transmitting transducers and a plurality of receiving transducers, the plurality of transmitting transducers form a transmitting array, the plurality of receiving transducers form a receiving array, and the opening angles of the transducers in the transmitting array and the receiving array are set to ensure that the plurality of receiving transducers can receive signals from the transmitting array. A protective shell is arranged outside the transmitting array and the receiving array, and the strength of the protective shell is enough to ensure that the protective shell can penetrate into seabed sediments with various hardness degrees; the depth adjusting unit is respectively connected with the protective shells of the transmitting array and the receiving array; by adopting the technical scheme of the invention, fine measurement of the acoustic characteristics of the seabed shallow sedimentary layer can be realized.

The utility model relates to a sampling device for seabed sediments. The sampling device comprises a fixing frame, a collecting mechanism and a propelling mechanism, the sampling pipe is vertically and movably mounted on the fixed frame; the collecting mechanism is in downward contact with the protective sleeve and drives the protective sleeve to move downwards in the descending process; the cylindrical tool bit is limited in an inner ring surrounded by the plurality of elastic sheet petals in a relatively sliding manner so as to open the elastic sheet petals; after the cylindrical tool bit is separated from the elastic sheet petals in the relative upward moving process of the collecting mechanism, the elastic sheet petals elastically contract to cover the opening of the sampling tube, so that the problems that sediments are easily disturbed to be damaged and easily slide out of the sampling tube to leak during sampling of an existing sampling device are solved.

The invention discloses a high-pressure self-balancing type seabed sediment sampling bottle nitrogen charging anti-oxidation method, and belongs to the technical field of chemical analysis and material testing, and the method comprises the following steps: obtaining physical characteristic parameters of sediment in a sampling bottle; performing analysis and calculation according to the physical characteristic parameters, and determining initial nitrogen charging control parameters; filling nitrogen into the sampling bottle based on the initial nitrogen filling control parameter, and synchronously monitoring the pressure in the bottle and the pressure of the external environment to form a driving pressure difference; and a preset self-balancing exhaust valve is driven through the driving pressure difference, and residual gas is exhausted. According to the method, the initial nitrogen charging parameter is determined by firstly obtaining the physical characteristic parameters of the sediment, and then the driving pressure difference formed by nitrogen charging is used for driving the self-balancing exhaust valve to exhaust the residual gas, so that personalized, high-efficiency and high-reliability nitrogen charging anti-oxidation treatment can be carried out on different sediment samples.

The invention discloses a submarine sediment in-situ low-frequency acoustic measurement system and method. The in-situ low-frequency acoustic measurement system for the seabed sediment comprises a mother ship, a control center, an umbilical cable, a low-frequency sound source transmitting host, a drill rod and a self-contained acoustic receiver, when the low-frequency sound source emission host controls the drill rod to drill into a target detection stratum, the self-contained acoustic receiver is put into the drill rod, after the drill rod clamps the self-contained acoustic receiver, the self-contained acoustic receiver is pressed into the target detection stratum, and the drill rod is used for drilling seabed sediments; the low-frequency sound source transmitting host is used for transmitting sound wave signals with different frequencies, and the self-contained acoustic receiver processes and converts the received sound wave signals with different frequencies into data and stores the data; the control center reads data measured by the self-contained acoustic receiver and analyzes the data to obtain sound velocity and sound attenuation of the seabed sediment at different frequencies. According to the invention, the accuracy of ocean sediment acoustic measurement can be improved, and the frequency range of ocean sediment acoustic measurement is increased.

The invention provides an underwater environment area dynamic search method, which comprises the following steps of: transmitting and receiving a sound wave signal by using a multi-beam sonar system, obtaining a high-resolution underwater environment image, and extracting particle size distribution data of submarine sediments through image analysis; establishing a mapping model by combining the sound wave frequency and the sediment acoustic characteristics to calculate a scattering intensity distribution map; adopting a pattern recognition algorithm to recognize the sediment particle size and the sound wave incident angle, and correcting inertial navigation data errors; a spatial filtering parameter optimization model is established based on sediment particle size distribution, filtering parameters are adjusted to remove noise, and scattering signal features are extracted; the configuration of the receiving array and the search area are dynamically adjusted according to the particle size change of the sediment, accurate and real-time analysis and environment adaptability search of the particle size distribution of the underwater sediment are realized, and the efficiency and accuracy of underwater detection are greatly improved.

The invention discloses a seabed sediment temperature measuring device for an unmanned platform, comprising a float unit, an iridium module, a wireless data receiving module, a weight, a data processing chamber, a timer releaser, and a temperature probe, wherein the temperature probe comprises an upper end shaft, an intermediate shaft, and a probe tip, wherein the upper end shaft and the intermediate shaft are detachably connected, and the intermediate shaft and the probe tip are detachably connected; the seabed sediment temperature measuring device for an unmanned platform of the present invention can be automatically separated and the detected seabed sediment data can be sent to an email server, and the seabed sediment temperature value and the change trend detected by the seabed sediment temperature measuring device of the unmanned platform can be viewed in real time by logging into the email, and the operation is novel and the setting is simple.

The application discloses a kind of sea surface convergence zone parameter calculation method and system based on sound propagation loss, method includes: propagation loss acquisition step: according to horizontal sound velocity profile variation data, seabed topography variation data and seabed sediment parameter, propagation loss data is obtained by sound propagation model;Convergence path acquisition step: based on propagation loss data, convergence path data and convergence zone quantity parameter are obtained by constant false alarm processing technique and connected domain technique;Convergence zone center point acquisition step: based on convergence path data, the position of convergence zone center point is determined by constant false alarm technique;Convergence zone boundary acquisition step: based on the gradient variation characteristics of convergence zone center point position combined with propagation loss data, the range boundary of the range boundary of convergence zone center point position is determined, and the detection and identification of underwater acoustic field convergence zone under complex marine environment are realized by the application.