26 results about "Ocean bottom seismograph" patented technology

The invention relates to the technical field of geological disaster assessment, in particular to a seafloor landslide mass stability assessment method based on multi-source geophysical data, which comprises the following steps: S1, acquiring multi-beam sounding, side-scan sonar, seafloor seismograph and sediment columnar sample data, completing space-time registration, and performing equivalent density conversion on acoustic wave impedance and shear wave velocity to obtain an acoustic wave impedance and shear wave velocity; constructing a three-dimensional grid model; s2, based on the three-dimensional grid model, calculating a curvature mutation index by adopting sliding window Fourier analysis, calculating a pressure gradient in combination with pore water pressure data, and generating a characteristic parameter matrix composed of density, curvature and pressure gradient; and S3, based on the characteristic parameter matrix, calculating shear strain energy and gravitational potential energy superposition field intensity, and generating a landslide mass stability map taking the instability probability as an index. According to the invention, a visual three-dimensional landslide mass stability map is constructed, and high-precision identification and three-dimensional early warning of submarine landslide risks are realized.

The application discloses a method and device for extracting Scholte wave attenuation coefficients, a system and a storage medium, and comprises the following steps: collecting seabed seismic data of an observation area; obtaining a pretreated common-receiver gather based on the seabed seismic data of the observation area; based on the CRG gather data in the SU format pretreated by the seabed seismograph, using high-resolution forward and inverse transformation, separating and extracting the base-order CRG gather with energy focusing and single order from the CRG gather coupled and stacked by multiple-order Scholte waves; based on the base-order CRG seismic gather, calculating the attenuation coefficients of any two gathers, and after the cyclic calculation of all gather pairs is completed, the average attenuation coefficient model corresponding to the gather pair is obtained. By using the technical scheme of the application, the Scholte wave dispersion order can be accurately separated, and the base-order attenuation coefficient can be specially extracted.

The invention discloses an ocean bottom seismograph putting device, relates to the technical field of seismograph putting, and solves the problems that after a seismograph stably falls to the seabed, the bottom of the seismograph is horizontally placed on the ground of the seabed, the position of the seismograph is easy to deviate or incline under the long-term flowing of seabed water flow, and the seismograph cannot be put on the seabed. The seismograph throwing device comprises a throwing base and a protective shell, the protective shell is fixedly installed at the upper end of the throwing base, and a first flow guide hole and a second flow guide hole are formed in the throwing base in a matched mode, so that the seismograph can not be normally used, and the use efficiency of the throwing device is reduced. Water flow can enter through the first flow guide hole and be discharged from the second flow guide hole, the impact force of seawater on the whole device is reduced, meanwhile, negative pressure is formed in the device through cooperation between the first flow guide hole and the second flow guide hole, and the stability of the position after the whole device is placed can be improved.

The invention belongs to the technical field of marine seismic observation, and discloses a sink coupling frame and a release mechanism thereof. The sink coupling frame comprises a base and a connecting piece, the connecting piece is fixedly arranged on the base, and a spherical crown part is arranged at the top of the connecting piece. The releasing mechanism comprises a mounting structure, a driving piece and clamping pieces, the mounting structure is used for mounting the releasing mechanism on the ocean bottom seismograph, the number of the clamping pieces is at least two, the driving piece is used for driving the at least two clamping pieces to clamp or release the connecting piece, and when the clamping pieces clamp the connecting piece, the inner wall surfaces of the clamping pieces are attached to the outer surface of the spherical crown part. The releasing mechanism and the sinker coupling frame are used in a matched mode, the releasing mechanism clamps or releases the connecting piece through the clamping piece to achieve connection and release between the releasing mechanism and the sinker coupling frame, and the matched mode can effectively release the sinker coupling frame after the releasing mechanism receives a releasing instruction. The situation that the clamping piece of the releasing mechanism and the connecting piece of the sink coupling frame are clamped when the ocean bottom seismograph and the sink coupling frame incline in the seabed is avoided, and the recovery success rate of the ocean bottom seismograph is increased.

The invention relates to the field of ocean exploration, and discloses an underwater target sensing method based on Monte Carlo, which comprises the steps of data extraction and uncertainty evaluation thereof, sound wave travel time calculation, underwater moving target position modeling, position inversion and uncertainty evaluation. As an underwater target has strong concealment, the position of the underwater target is difficult to detect through visual observation and electromagnetic waves. However, the interaction between the underwater moving target and the water body generates a sound wave signal, and the position of the underwater moving target can be accurately detected based on sonar or ocean bottom seismograph detection data by using the characteristic that sound waves are almost not attenuated in the water body. Through the propagation time of sound waves in a water body, the position of an underwater target can be modeled based on a nonlinear Monte Carlo inversion method and a Bayesian formula, the position of the underwater target is obtained, and meanwhile, the uncertainty of the position of the underwater target is evaluated through probability statistics. The method can play an important role in underwater vehicle positioning, marine organism migration research, ocean exploration and seabed navigation.

The invention discloses a negative pressure and electric detonator starting type ocean bottom seismograph release device and an operation method thereof, and belongs to the field of ocean bottom detection instruments. The technical problems that an existing ocean bottom seismograph releasing device is not suitable for low-salinity environments such as lakes or fresh water environments, and the recovery rate of an ocean bottom seismograph is not high due to the fact that the structure of the ocean bottom seismograph releasing device is complex are solved. The lower portion of the main cavity is fixedly connected with the lotus root sinking frame, the one-way valve for vacuumizing vertically penetrates through and is installed on the lower bottom face of the main cavity, the diaphragm type safety valve horizontally penetrates through and is installed on the left side face of the main cavity, and the position of a firing pin of the electric explosion starting device accurately corresponds to the position of a safety diaphragm of the diaphragm type safety valve in the horizontal direction. The end cover hermetically covers the upper end of the main cavity, the electric explosion starting device is started, the interior of the main cavity is balanced with external pressure after entering seawater, and the glass ball cabin of the ocean bottom seismograph is separated from the main cavity under the action of buoyancy of the glass ball cabin and ascends to the water surface. The device is simple in structure and high in reliability and is used for releasing the ocean bottom seismograph.

The utility model discloses a self-sinking and floating type ocean bottom seismograph based on an MEMS accelerometer, and specifically relates to a self-sinking and floating type ocean bottom seismograph comprising a cabin body which is divided into a first buoyancy cabin and a second buoyancy cabin which are sequentially distributed along the vertical direction according to the structure; the first buoyancy compartment and the second buoyancy compartment intersect with each other to form a compartment clamping cavity, and an underwater acoustic pressure sensor, an MEMS accelerometer and a seismograph sensor are arranged in the compartment clamping cavity; a mounting cylinder distributed along the axis is fixedly arranged on the outer wall of the second buoyancy compartment, and a counterweight module is in threaded connection with the mounting cylinder. According to the utility model, water pressure data and attitude data of the water level where the self-sinking and floating type ocean bottom seismograph is located and data for monitoring and recording ocean bottom earthquake activities are obtained through the underwater sound pressure sensor, the MEMS accelerometer and the seismograph sensor.

The invention discloses a horizontal component azimuth correction method, device and equipment of a sea bottom seismograph and a medium. The method comprises the following steps: acquiring target direct water wave signals corresponding to a plurality of target shot point positions on a target survey line; for each target shot point position, target direct water wave total energy corresponding to the target direct water wave signal is determined; determining a plurality of candidate horizontal component orientations in a preset orientation range, and determining a target horizontal component orientation corresponding to the total energy of each target direct water wave from the plurality of candidate horizontal component orientations; and determining a target rotation angle according to a target orientation in the target horizontal component orientations corresponding to the plurality of target shot point positions, and correcting the initial horizontal component orientation according to the target rotation angle to obtain a reference horizontal component orientation. According to the scheme, the direct water wave maximum energy orientation is determined by using the direct water wave signal in the OBS horizontal component orientation so as to realize efficient and accurate correction of the horizontal component orientation, and the stability and practicability of horizontal component orientation correction are enhanced.

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.

The invention relates to the technical field of ocean geophysical exploration, in particular to a short-period time-lapse seismic acquisition method and device based on water surface unmanned autonomous excitation. The problems that in an existing time-lapse seismic data acquisition method, the time-lapse acquisition period is long, the large ship routing error is large, the ship labor cost is high, and the environmental adaptability is poor can be solved to a certain extent. The method comprises the steps that an unmanned ship carries a seismic source; arranging an ocean bottom seismograph at the seabed of an observation target sea area to collect seismic data and store the seismic data in situ, and connecting the ocean bottom seismograph with a water surface base station through an optical fiber cable to carry out data transmission; a star-shaped seismic survey line is designed on the water surface; performing autonomous cruise through the unmanned ship based on the seismic survey line; after measurement of all the seismic survey lines is completed, seismic data stored in situ by the ocean bottom seismograph are transmitted to a base station through an optical fiber; and the autonomous cruise of the unmanned ship is repeated to measure all the seismic lines, and short-period time-lapse seismic acquisition is realized.

The present application provides a kind of shallow water sound and seabed ground sound homologous peak azimuth correction method and system based on deep learning.The method obtains hydrophone array signal, seabed seismograph signal and array geometry and azimuth reference in the same observation period, extracts water sound time delay candidate peak and ground sound azimuth spectrum candidate peak, forms candidate azimuth correction peak pair and calculates candidate absolute azimuth correction amount, generates azimuth correction angle set under different sub-band, hydrophone element pair and seismograph component combination, obtains direction concentration degree using Rayleigh test, and embeds the direction concentration degree into the Dirichlet distribution parameter generation process of Evidential Deep Learning model, limits homologous evidence, determines homologous peak pair according to evidence proportion and uncertainty, determines absolute azimuth correction amount and corrects water sound positioning azimuth;The method can be used for shallow target positioning, and reduces the influence of non-homologous peak misadoption on positioning azimuth.

This application discloses a seabed seismograph, which includes a detection unit and a connection unit. The detection unit includes a main unit and several sub-units. Each sub-unit is arranged around the main unit and surrounds the main unit. The sub-units are used to monitor seismic signals. The main unit is electrically connected to each sub-unit and is used to collect the seismic signals monitored by the sub-units. The connection unit is used to connect each sub-unit to the main unit and distribute the main unit and each sub-unit on a preset geometric array. The connection unit can connect the main unit and each sub-unit and keep the relative positions between each sub-unit and the main unit, and the relative positions between each sub-unit, constant before and after deployment. The main unit and each sub-unit are distributed on the preset geometric array to meet the requirements of in-situ monitoring of the seabed seismograph.

The invention discloses an ocean bottom seismograph bottom-sitting system, which is used for ocean bottom seismograph observation and ocean bottom earthquake fluctuation signal recording, and belongs to the technical field of seismographs, the ocean bottom seismograph bottom-sitting system comprises a seismograph base body and a seismometer arranged in the seismograph base body, the seismograph base body is of a column sleeve-shaped structure with a cavity and an opening at one end, and the seismograph base body is provided with an opening at the other end. A limiting base body coaxial with the seismograph base body is fixedly arranged in the seismograph base body, the limiting base body is of a circular ring structure, and a limiting ball is movably arranged at one end of the limiting base body. The device can be automatically attached to the seabed, the signal-to-noise ratio is stably improved, and the problems that the ocean bottom seismograph is difficult to reach the seabed to be attached to the seabed and the signal-to-noise ratio is low are effectively solved.

The invention relates to a recovery system for recovering a seabed seismometer (2), the recovery system (1) being intended to equip a ship (3). The recovery system (1) comprises a receiving device (11), preferably perforated, capable of receiving said seismometer (2); a guide barrier (121) capable of defining, with the hull of the ship (3), a guide zone of the seabed seismometer (2) towards the receiving device (11); and a movement mechanism (13) configured to move the receiving device (11) between a low position in which the receiving device (11) is at least partially submerged, and a high position allowing an operator or apparatus present on the ship (3) to recover the seabed seismometer (2) carried by the receiving device (11). The invention also relates to a ship and a corresponding method. Figure for abstract: Fig. 2

The application discloses a horizontal component azimuth correction method, device, equipment and medium of a submarine seismograph. The method comprises the following steps: acquiring target direct water wave signals corresponding to a plurality of target shot point positions on a target survey line; for each target shot point position, determining a target direct water wave total energy corresponding to the target direct water wave signal; determining a plurality of candidate horizontal component azimuths within a preset azimuth range; determining a target horizontal component azimuth corresponding to each target direct water wave total energy from the plurality of candidate horizontal component azimuths; determining a target rotation angle according to a target azimuth in the target horizontal component azimuths corresponding to the plurality of target shot point positions; and correcting an initial horizontal component azimuth according to the target rotation angle to obtain a reference horizontal component azimuth. The present scheme uses the direct water wave signals on the OBS horizontal component azimuth to determine the direct water wave maximum energy azimuth to realize efficient and accurate correction of the horizontal component azimuth, thereby enhancing the stability and practicality of the horizontal component azimuth correction.

The invention discloses a multi-scale transformation seismic event detection method based on a seabed application scene, and relates to the technical field of seismic event detection. According to the seismic event detection method based on the multi-scale comprehensive transformation of the seabed application scene, a plurality of channel original signals are collected through a seabed seismograph, and a fusion feature vector is constructed through multi-scale time-frequency transformation; performing local event preliminary screening, generating an event packet, and reporting the event packet to the buoy node; in the buoy nodes, event packets uploaded by all the ocean bottom seismometers in the jurisdiction range of the buoy nodes are received, and a cluster report is generated and transmitted to the shore-based processing center after the weighted comprehensive confidence coefficient is analyzed; in a shore-based processing center, cluster event reports uploaded by all buoy nodes within the range where the shore-based processing center is located are received, and the global existence probability of the same event is analyzed. And determining the same event higher than a preset global existence probability threshold as a real seismic event.

The invention relates to the technical field of ocean geophysical exploration, and provides an ocean bottom seismograph data multiple wave identification and suppression method and device, and the method comprises the steps: obtaining simulated ocean bottom seismograph data and actual ocean bottom seismograph data collected by a field OBS station; inputting actual single-shot seismic data into the trained support vector machine to obtain actual single-shot seismic data with multiple waves and actual single-shot seismic data without multiple waves; and inputting the actual single-shot seismic data with the multiples into a trained convolutional neural network model to obtain a multiple period of the actual single-shot seismic data with the multiples. According to the method, long-measuring-line and large-depth active source low-frequency OBS records can be not influenced by multiple wave types, multiple reflected / refracted waves of different periods and different types are efficiently confirmed and searched only on the basis of periodicity, and various periodic multiple waves are suppressed according to multiple determined prediction step lengths.

The application discloses a kind of based on inertial trigger and multimodal perception's seabed seismograph intelligent recovery system, belong to marine geophysical exploration equipment technical field, including: sealed pressure cabin, and the main control unit of pressure cabin, capacitive inertial detection unit, attitude sensor, GPS module, data radio station module, LED flash group, power management module are set in the pressure cabin.The application has the advantages of simple structure, high reliability, low power consumption, high searching efficiency.

The embodiment of the invention provides an ocean bottom seismograph mounting frame with leveling capability, and relates to the field of supporting. Comprising a base, a plurality of extension seats, a translation mechanism, a positioning mechanism and a through hole, the extension seats are mounted on the circumference of the base in the circumferential direction, inner cavities of the extension seats are communicated with an inner cavity of the base, the through hole is formed in the center of the base, and the translation mechanism is arranged in the through hole. The translation mechanism and the positioning mechanism are mounted on the extension seat; the positioning mechanism comprises a fixing block, a positioning claw and a sliding rod, the fixing block is installed on the side, away from the base, of the extending base, the positioning claw penetrates through the fixing block in a sliding mode, and the sliding rod is installed at the top end of the positioning claw. The positioning claws are inserted into the seabed, so that the equipment stability is improved; the positioning claws can be sequentially driven to be inserted into seabed sediment, and the equipment is prevented from being lifted; obstacles such as stones can be pushed away, normal landing of the ocean bottom seismograph is ensured, and poor receiving of vibration signals is prevented.

The present invention belongs to the technical field of marine equipment, and specifically discloses a seafloor seismograph, including a shell, an instrument mounting frame, a monitoring device and an auxiliary recovery device; the instrument mounting frame includes a mud stop plate and a lifting lug; the monitoring device includes an instrument compartment device and an electromagnetic acoustic release device, the electromagnetic release device is provided with a permanent magnet and an electromagnet, and the magnetic force of the electromagnet and the magnetic force of the permanent magnet are repelled; the seafloor seismograph using the above structural design can efficiently release the counterweight assembly through the setting of the electromagnetic release device to achieve the recovery of the instrument, and can also save electric energy, and only release the counterweight assembly when the instrument needs to be recovered, and the electromagnet needs to be powered. In addition, through the setting of the shell and the instrument mounting frame, many problems caused by the traditional glass float design are effectively changed, thereby greatly reducing the resistance of the seafloor seismograph, effectively improving the noise reduction level, and then also making the quality of the collected data improved to a certain extent.

The present application relates to the technical field of ocean bottom seismometer, in particular to a double release system of ocean bottom seismometer, the cabin ball and the mechanical releaser are arranged on the fixed support panel, the cabin ball is provided with the electrochemical fuse release assembly and the rotating rod, the mechanical releaser is connected with the battery cabin ball through the cable; the sink coupling frame is connected below the fixed support panel, the sink coupling frame comprises the chassis and multiple struts, the pulley is arranged between two struts, one end of the fixed wire is connected with the unhooking sleeve, the other side of the fixed wire is wound through the pulley and is sleeved with the rotating rod through the fixed support panel, the cabin ball, the fixed support panel and the sink coupling frame form an integral whole. The present application provides an ocean bottom seismometer with chemical and mechanical double release modes, the mechanical releaser with large volume and weight is improved, and is combined with the chemical release to form the OBS system with chemical and mechanical double release modes, two release modes are triggered at the same time, and the OBS can be successfully released when any release is successful.

The invention provides an ocean bottom seismograph with an automatic leveling function, and relates to the technical field of ocean seismic observation. The device comprises a seismograph which is installed at the inner side of a fixing ring; the leveling mechanism comprises four inner bases and outer bases, the four inner bases surround the outer side of the fixing ring, two oppositely-arranged inner bases are connected with the periphery of the fixing ring through first bearings, the outer bases are arranged on the outer sides of the other two oppositely-arranged inner bases, the outer bases are connected with the inner bases through second bearings, and the outer bases are connected with the fixing ring through second bearings. The axes of the two first bearings are collinear, the axes of the two second bearings are collinear, the axes of the first bearings and the second bearings are coplanar, and the intersection point of connecting lines of the axes is higher than the gravity center of the seismograph; the locking mechanism comprises a first locking disc and a second locking disc which are coaxially and fixedly connected with the first bearing and the second bearing respectively, and the first locking disc and the second locking disc are locked in a matched mode through a push rod assembly. The ocean bottom seismograph provided by the invention can realize automatic leveling and locking at the seabed, and ensures that seismic data can be normally recorded.

The present application relates to marine geophysical exploration and seabed observation equipment laying technical field, specifically relates to a kind of seabed seismograph laying point adaptive design method based on topographic gradient.The method obtains seabed topographic grid data, instrument total quantity and survey line control point, determines the integer laying interval quantity of each survey section under the constraint of laying interval total number and generates theoretical laying point;According to the water depth of each point, determine the topographic evaluation radius, calculate the average slope of evaluation area;For the point exceeding critical slope, candidate point is generated step by step along the positive and negative direction of the survey section according to the associated moving step length, and the nearest qualified candidate point is selected;When there is no qualified point within the maximum allowed moving distance, select the point with the smallest average slope in the region and generate a high-risk identifier.The present application can consider laying interval uniformity, seabed topographic adaptability and survey line geometric structure stability.

The application discloses an integrated environment-friendly seabed seismograph, which comprises a first base body, a through hole is arranged in the middle of the first base body, and a seismic detector is arranged in the through hole; a second base body is connected below the first base body; a hole body is arranged through the middle of the second base body; the seismic detector can pass through the hole body; the first base body and the second base body are both conical table structures; the device can reduce the difficulty of deployment and recovery, improve the accuracy of the deployment position, and minimize the underwater sound noise and impact of the equipment during launching.

A negative pressure and electric squib-activated ocean bottom seismograph release device and its operating method belong to the field of ocean bottom detection instruments. The present invention solves the technical problems that the existing ocean bottom seismograph release device is not suitable for low-salinity environments such as lakes or freshwater environments, and the recovery rate of the ocean bottom seismograph is not high due to the complex structure of the ocean bottom seismograph release device. The lower part of the main cavity is fixedly connected to the lotus root frame, the vacuum one-way valve passes vertically through and is installed on the lower bottom surface of the main cavity, the diaphragm safety valve passes horizontally through and is installed on the left side of the main cavity, the firing pin position of the electric squib-activated device accurately corresponds to the safety diaphragm position of the diaphragm safety valve in the horizontal direction, the end cover seal is closed on the upper end of the main cavity, the electric squib-activated device is activated, the interior of the main cavity enters seawater and is balanced with the external pressure, and the glass ball cabin of the ocean bottom seismograph is separated from the main cavity by its own buoyancy and rises to the water surface. The structure is simple and the reliability is high. The present invention is used for the release of ocean bottom seismographs.

The invention discloses an intelligent recovery device and a recovery method for an ocean bottom seismograph, which are used for recovering the ocean bottom seismograph and belong to the technical field of ocean exploration. The device comprises a ship body and a rope winding machine arranged on the ship body, the rope winding machine is connected with a first rope body and a second rope body, and the end parts of the first rope body and the second rope body are connected with hook bodies; and the end part of the first rope body and the end part of the second rope body are respectively connected to different positions of the hook body. The device can recycle the seismograph device arranged on the seabed, and effectively solves the problems that the seabed seismograph is difficult to recycle, and the recycling device is expensive and complex.