10 results about "Ocean bottom" patented technology

A method for designing a seismic survey including (a) selecting a seismic survey grid as a basis for a seismic survey design, (b) generating off-the-grid locations by imposing spatial / temporal constraints on on-the-grid locations of the seismic survey grid, (c) mapping the off-the-grid locations from a physical domain to a pre-selected domain by applying a multidimensional transform to the off-the-grid locations, (d) mapping the pre-selected domain to a rank-revealing domain using a pre-selected operator, (e) applying a pre-selected process to minimize a rank of the off-the-grid locations in the pre-selected domain, (f) updating the seismic survey design based on which of the off-the-grid locations has the minimum rank, (g) repeating steps (b)-(f) for a number of iterations until a pre-selected threshold is met indicating an optimal seismic survey design, and (h) acquiring seismic data using the optimal seismic survey design.

A seabed magnetic exploration device capable of suppressing the difference in distance from each magnetic sensor to the seabed. [Solution] This is an underwater magnetic exploration device that explores dangerous objects on the seabed F by measuring with multiple magnetic sensors 12-21 fixed at intervals in a width direction W perpendicular to the direction of movement T of a frame body 11 that moves underwater. The device is equipped with multiple transmitters and receivers fixed to different locations in the width direction of the frame body 11, each of which emits sound waves toward the seabed F and receives reflected waves, distance derivation means that derives the distance from each transmitter and receiver to the seabed F based on the time difference between the emission of the sound wave by each transmitter and receiver and the reception of the reflected wave, and tilt adjustment means 25, 26, 27, 28 that adjust the tilt of the frame body 11 in the width direction.

A method for designing a seismic survey including (a) selecting a seismic survey grid as a basis for a seismic survey design, (b) generating off-the-grid locations by imposing spatial / temporal constraints on on-the-grid locations of the seismic survey grid, (c) mapping the off-the-grid locations from a physical domain to a pre-selected domain by applying a multidimensional transform to the off-the-grid locations, (d) mapping the pre-selected domain to a rank-revealing domain using a pre-selected operator, (e) applying a pre-selected process to minimize a rank of the off-the-grid locations in the pre-selected domain, (f) updating the seismic survey design based on which of the off-the-grid locations has the minimum rank, (g) repeating steps (b)-(f) for a number of iterations until a pre-selected threshold is met indicating an optimal seismic survey design, and (h) acquiring seismic data using the optimal seismic survey design.

The disclosure relates to an autonomous underwater vehicle for marine seismic data acquisition, the autonomous underwater vehicle comprising a cavity for accommodating an ocean bottom node such that a coupling surface of the ocean bottom node is at least partially exposed for coupling the ocean bottom node to a sea floor. The disclosure further relates to a marine seismic data acquisition system comprising an autonomous underwater vehicle and an ocean bottom node provided in the cavity. The disclosure further relates to a marine seismic data acquisition method comprising installing an ocean bottom node in a cavity of an autonomous underwater vehicle; releasing the autonomous underwater vehicle to a sea floor; and recording marine seismic data while the ocean bottom node is coupled to the sea floor.

The present invention discloses a method, system, and electronic device for quickly fitting a Biot model parameter curve. The method comprises: obtaining ocean bottom sediment data, determining an initial parameter value for each sediment parameter based on the ocean bottom sediment data; constructing a preliminary curve of the Biot model based on the initial parameter values; performing a sensitivity analysis on the Biot model to obtain a weight coefficient for each parameter; performing a piecewise fitting based on the Biot model by combining measured data with a preset frequency segment; and, during the fitting process, searching for a target fitting result of the Biot model using a particle swarm optimization algorithm. The present invention achieves accurate fitting of the Biot model parameter curve by combining the sensitivity analysis and piecewise fitting methods and utilizing the particle swarm optimization algorithm, thereby not only improving fitting efficiency but also more accurately reflecting the characteristics of seabed sediments. This provides strong support for marine geological exploration and resource development, and can be widely applied in the field of data processing technology.

A system and a method for arrangement and recovery of an ocean bottom node are disclosed. The system for arrangement and recovery of an ocean bottom node, according to the present invention, comprises: an ocean bottom node (OBN) disposed on the seabed; a movement path prediction device for predicting a movement path along which the OBN moves from the sea surface to the ocean bottom in response to a marine area in which the OBN is disposed; and a drop point calculation device for setting a seabed point at which the OBN for the marine area is disposed, and calculating a drop point of the OBN on the sea surface corresponding to the set seabed point on the basis of the movement path predicted by the movement path prediction device.

A method may include ocean bottom sensor (OBS) acquisition designed for complex earth model building and imaging with full waveform inversion (FWI) technology. Various combinations of OBS source and receiver patterns, as well as source design may be validated with FWI sensitivity kernel analysis technique. Usually, OBS design is done using conventional methods based on wavelength, frequency requirements, ray tracing and rules of thumps. The method of the disclosed embodiments utilizes OBS design and acquisition combined with FWI sensitivity kernel analysis.

A correlated sparse nodes and mini-streamers system for collecting seismic data includes plural nodes distributed on the ocean bottom, and a mini-streamer spread that includes plural mini-streamers. The plural nodes and the mini-streamer spread are configured to simultaneously collect seismic data from a surveyed subsurface, and wherein a length of the mini-streamers is equal to or less than three times an inline distance between adjacent nodes of the plural nodes.

The invention discloses an in-situ measurement system for ocean bottom layer suspended matter flux, which comprises a light source, a frame structure, a support structure, a plurality of cameras, a support adjusting module, an attitude sensor, an optical fiber and a control module, and is characterized in that the control module is connected with the light source, the cameras, the support adjusting module and the attitude sensor through the optical fiber; the light source and the camera are placed in the frame structure through the support structure, and the attitude sensor is arranged in the frame structure; the support adjusting module is used for adjusting the height of the support structure to adjust the height from the light source and the camera to the seabed; and the control module is used for receiving attitude information sent by the attitude sensor and video information sent by the plurality of cameras, sending a control instruction and calculating the flux of suspended solids at the bottom layer of the ocean according to the video information. The embodiment of the invention can improve the accuracy of measuring the flux of the marine bottom layer suspended solids. The method can be widely applied to the technical field of marine survey.

The invention belongs to the technical field of ocean engineering, and discloses an ocean subsurface buoy system and a control method thereof.The ocean subsurface buoy system comprises a communication buoy and a subsurface buoy, the subsurface buoy is electrically connected with the communication buoy through a communication cable, and a buoy retracting and releasing device is arranged on the subsurface buoy and connected with the communication buoy through a connecting cable; the communication buoy is provided with a first position and a second position, the buoy winding and unwinding device is used for achieving switching of the communication buoy between the first position and the second position by winding and unwinding the connecting cable, the communication buoy is located on the ocean water surface when the communication buoy is located at the first position, and the communication buoy is located outside the ocean internal subsurface buoy when the communication buoy is located at the second position. According to the ocean subsurface buoy system, the subsurface buoy and the communication buoy are physically separated, the subsurface buoy is always kept at the underwater safe depth, and the micro communication buoy is released to the water surface for short-time communication only when needed and is recovered immediately after communication is finished, so that the contradiction between the concealment and the communication capability is solved, and the survivability and the task cycle of the system are improved.