14 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 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 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 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 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 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 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 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.