456results about "Measuring open water movement" patented technology

A method for use in seismic surveying includes determining the shape of a seismic cable during a seismic survey; determining the tension on the seismic cable at a plurality of points along the seismic cable; and predicting a current that will impact the seismic cable from the determined shape and the determined tension. The method may be practiced two-dimensionally in the context of a marine survey employing a towed streamer array or three-dimensionally in the context of laying an array of ocean bottom cables on the seabed. The predicted currents can, in some embodiments; be used to make steering corrections for the seismic cables.

The invention discloses a dynamic change original position observation system for a seabed interfacial layer. The dynamic change original position observation system comprises a seabed interfacial layer observation platform, an oscillating type detection rod penetrating apparatus and a multiparameter observation detection rod, wherein the seabed interfacial layer observation platform is used for loading various observation apparatuses and the oscillating type detection rod penetrating apparatus and is in riveted connection with the detection rod penetrating apparatus, the probe of an anti-sinking plate and a through hole are designed to form the laying stability and recovery convenience of an entire observation system, and the oscillating type detection rod penetrating apparatus uses a vibration exciter to generate vertical power to allow the observation detection rod to continuously insert in seabed deposit. New design principle and means are employed, partial liquefaction and strength reduction of seabed deposit can be realized through high frequency vibration, so that the observation detection rod can continuously insert in the seabed deposit, and the implementation is more convenient. The multiparameter observation detection rod is connected with the vibration exciter, and integrated with various sensors to realize synchronous observation of three-phase media of sea water body-seabed interface-seabed deposit. A water inlet fine pipe is provided and a water inlet when opened during recovery can eliminate vacuum suction on the bottom of the detection rod to facilitate recovery. The observation system provides essential technology support for researching dynamic evolution of the seabed interfacial layer.

A water-monitoring apparatus includes a frame being installed by water. A reel is mounted on the frame. A tension cable is wound on the reel and including a lower end and an upper end. A buoy is connected with the tension cable. A control device is connected with the reel. When the water level changes, the control device rotates the reel so as to adjust a length of the tension cable extending from the reel for allowing the buoy to just float on the water surface. A detecting device is carried via the buoy for detecting at least one environmental characteristic and for producing at least one signal representative of the at least one environmental characteristic. A signal wire is electrically connected with the detecting device. The signal wire includes a helical section for automatically adjusting a distance between its two ends according to the position of the buoy. A monitor device is electrically connected with the signal wire.

A system for determining the directional properties of surface waves or internal waves of a fluid medium includes a sonar system having a plurality of transducers for generating respective, separate acoustic beams and receiving echoes from one or more range cells located substantially within the beams; and a computer program for determining the directional properties associated with the surface waves or internal waves from the received echoes, wherein the computer program determines along-beam velocities along the separate acoustic beams and combines the along-beam velocities to form an equivalent orbital velocity vector. The system is mounted on or in a sub surface buoy that can move or rotate during measurement and includes a motion sensor measuring six degrees of freedom to account for horizontal velocity and vertical displacement in the subsurface buoy mounted sonar system.

A method for measuring sea waves includes: transmitting ultrasonic waves from an ultrasonic transmitter 2 provided on a buoy 1 into the sea, and receiving the ultrasonic waves from three transponders 3 on the seabed together with the time signals; detecting distances between the transponders 3 and the ultrasonic transmitter 2 based on the propagation time of the ultrasonic waves; high-pass filtering the distance data to extract a short-term fluctuation component; preparing and solving linear equations to determine the displacement in the height direction of the short-term fluctuation component and obtain a wave height.

The present invention relates to an autonomous underwater vehicle (“AUV”) for monitoring underwater fluid currents by detecting electrical currents induced by the flow of a conductive liquid through the Earth's magnetic field. More particularly, the present invention relates to the gathering of data related to underwater fluid currents and the control of AUV motion during data gathering.

Embodiments are directed towards a wave measuring electronics device that is integrated within a buoy and the buoy is moored in an ocean. The wave measurement device performs a computer-implemented method for estimating wave motion, including receiving 3D sensor data from each of an accelerometer and a gyroscope, determining, an absolute orientation of the buoy based on said 3D sensor data; and estimating, the true earth acceleration of the buoy over a specified time interval.

The platforms, systems, methods and computer readable media provided herein monitor a shore and near shore environment using a plurality of sensors, each sensor associated with a near shore water recreationist or near shore water recreationist equipment. The platforms, systems, methods and computer readable media provided herein include a server application configured to generate and transmit an environmental data report. The platforms, systems, methods and computer readable media provided herein include a device configured to receive the environmental data report.

The present invention provides a GPS device for measuring the wave height and current direction and speed, which is capable of accurately measuring the wave height (height of the waves) and current direction and speed (tidal current) in any point on the sea, ocean, lake, or marsh, and to a system using such a device. The GPS receiver 2 of the GPS device 1 for measuring the wave height and current direction and speed processes the GPS signals received with the GPS antenna 3 and measures the three-dimensional position of antenna 3. The three-dimensional position data are recorded by the data recording unit 4 connected to the GPS receiver 2. When the floating body 5 having those devices 2-4 installed thereon floats on the sea or ocean, it moves together with the waves and tidal current in the present location. The software 7 for conducting high-pass filter processing and smoothing processing is installed in the data processing unit 6, and the data on the wave height and current direction and speed are output, while the errors are being removed from the three-dimensional position data recorded in the data recording unit 4.

The invention discloses a calibration method for a flow field of the water surface of a river based on a lens imaging model at an inclined visual angle. The method comprises the following steps: setting two marker posts on a measuring section of the river for orientation; then fixedly connecting a laser range finder with an industrial camera to form an imaging measurement apparatus and erecting the imaging measurement apparatus on the measuring section at one riverbank; measuring the distance between the apparatus and an intersection of the marker posts and the water surface by using the laser range finder and calculating the elevation of the apparatus above the water surface according to a pitch angle measured by a built-in sensor; and separately solving object image scale factors of each velocity measurement line of an image on the section and in a fair current direction by using the lens imaging model at an inclined visual angle, and then calibrating corresponding starting point distance and flow velocity values to finish calibration of the flow field. Compared with the prior art, the method provided by the invention has the advantages that laying of control points at the two banks of the river and exploration of the coordinates of the control points with complex equipment like a total station are not needed, so workload and requirements on equipment are substantially reduced; and the calibration method is especially applicable to regular tour-measuring of the flow velocity and flow quantity of rivers and to emergency monitoring under extreme conditions.

The invention discloses a flow field intelligent calculation method and system based on an acoustic Doppler flow measurer, and relates to the technical field of flow field calculation. The flow fieldintelligent calculation method comprises the following steps that, a velocity vector of a cross section of a river to be measured is detected; a river profile model is established to enable velocity space distribution and a real river way to be mutually mapped; feature extraction is carried out on velocity distribution data of an actual measured area; overall cross section velocity distribution isspeculated by taking the data of a real measuring area as a definite condition; and a flow rate is calculated through a flow field. According to the flow field intelligent calculation method and system based on the acoustic Doppler flow measurer, an intelligence artificial algorithm is adopted to replace the work of manual calibration, the flow field intelligent calculation method and system based on the acoustic Doppler flow measurer has the characteristics of high accuracy and high efficiency, and full automation in the whole process is achieved.

A method for use in seismic surveying includes determining the shape of a seismic cable during a seismic survey; determining the tension on the seismic cable at a plurality of points along the seismic cable; and predicting a current that will impact the seismic cable from the determined shape and the determined tension. The method may be practiced two-dimensionally in the context of a marine survey employing a towed streamer array or three-dimensionally in the context of laying an array of ocean bottom cables on the seabed. The predicted currents can, in some embodiments, be used to make steering corrections for the seismic cables.

The invention discloses a water area elevation processing method for making a DEM (Dynamic Effect Model) based on an INSAR (Interferometric Synthetic Aperture Radar). The water area elevation processing method comprises the following steps: 1, acquiring original measurement data of a region to be measured; 2, carrying out water area elevation processing, namely, performing elevation processing on a static water area and / or flowing water area in the region to be measured, wherein the static water area is processed as follows: 2011, judging level; 2012, processing the level, comprising the steps of I, extracting a bay line; II, assigning an elevation value on the bay line; and III, correcting the water level elevation; and the flowing water area is processed as follows: 2021, judging vertical adjustment; 2022, processing the vertical adjustment, comprising the steps of i, extracting a bay line; ii, assigning a bay line elevation and processing adjustment; iii, constructing an irregular triangular net and an interpolation water level elevation; and iv, correcting a water level elevation. The water area elevation processing method disclosed by the invention is simple in steps, reasonable in design, convenient to realize, good in use effect, and capable of simply and rapidly completing a water area elevation processing process with high quality; the made DEM is high in elevation precision.

A system for determining the directional properties of surface waves or internal waves of a fluid medium includes a sonar system having a plurality of transducers for generating respective, separate acoustic beams and receiving echoes from one or more range cells located substantially within the beams; and a computer program executed by a processor for determining the directional properties associated with the surface waves or internal waves from the received echoes, wherein the computer program determines along-beam velocities along the separate acoustic beams and combines the along-beam velocities to form an equivalent orbital velocity vector.

The invention provides a novel real-time high-precision wave measurement method based on GNSS. GNSS phase, pseudo-range, Doppler frequency shift observation values and broadcast ephemeris are collected through a GNSS receiver (or board card) and an antenna carried by sea surface carriers such as a wave buoy, the three-dimensional speed of the carriers such as the buoy is obtained through epoch difference of the phase observation values, and then element information such as the direction spectrum, the frequency spectrum, the wave height, the period and the wave direction of waves is obtained; the change of displacement along with time is obtained by integrating the speed for a certain time length and removing a linear trend term, and wave element information can be also obtained through solving; and no extra precise differential correction number is needed, so that the service cost and the communication cost of precise differential correction are saved. The method is suitable for offshore and pelagic scenes, high-precision wave element information is obtained in real time and stored in the buoy locally or periodically for communication and return, the working range of GNSS-based ocean wave measurement is expanded, and the method has high practical application value.

The invention relates to a free telescopic ocean profile observation device and a method based on large buoys. The free telescopic ocean profile observation device comprises a free telescopic device,an underwater observation module, a data acquisition control module, a power supply module, a communication module and a data receiving and processing module, wherein the free telescopic device is used for providing power for underwater profile observation and accurate positioning of each depth layer; the underwater observation module is used for realizing integration and carrying of various observation sensors to acquire water body profile data; the data acquisition control module is use for intelligently controlling the action of the free telescopic device and the data acquisition of the underwater observation module according to sea conditions and forwarding the data to the communication module; and the communication module communicates with the data receiving and processing module of aland base station. By freely and accurately controlling the layer depth position of the underwater observation module, the free telescopic ocean profile observation device provided by the invention realizes long-term, continuous, fixed-point and real-time observation of the marine water body profile environmental parameters in a certain range under the condition of unattended operation, and breaks the current situation that the existing real-time observation parameters are limited to the surface layer of the sea.

The invention discloses a river comprehensive treatment system, and belongs to the technical field of water conservancy projects. The system comprises a flow velocity monitoring module, a data judgment module, an internet-of-things acquisition module, a data analysis module and a storage module; the flow velocity monitoring module is used for acquiring a water flow velocity information set of each river key point and river surface video information of the river key point in real time; the data judgment module is used for performing specified processing on the water flow speed information set and the river surface video information and judging whether the river key points are blocked or not; the internet-of-things acquisition module is used for acquiring hydrological data through an internet-of-things end; and the data analysis module is used for analyzing the hydrological data and judging whether the water quality is abnormal or not. According to the river comprehensive treatment system of the invention, on the basis of the combination of hydrological data, video data and third-party data, comprehensive analysis, early warning and unified command of river treatment are realized; the current situation of independent data acquisition and analysis of each specialty of current river treatment is solved, the repeated investment of system construction is reduced, and the data use value is improved; and the river treatment efficiency is improved.

The present invention relates to a method allowing short-term prediction of the wave motion (force, elevation, . . . ), from a time series of past wave measurements. The prediction method according to the invention is based on the estimation of the variable coefficients of an autoregressive model while allowing multi-step minimization, that is over a horizon of several time steps in the future, of the prediction error.

Systems and methods for sea state prediction and autonomous navigation in accordance with embodiments of the invention are disclosed. One embodiment of the invention includes a method of predicting a future sea state including generating a sequence of at least two 3D images of a sea surface using at least two image sensors, detecting peaks and troughs in the 3D images using a processor, identifying at least one wavefront in each 3D image based upon the detected peaks and troughs using the processor, characterizing at least one propagating wave based upon the propagation of wavefronts detected in the sequence of 3D images using the processor, and predicting a future sea state using at least one propagating wave characterizing the propagation of wavefronts in the sequence of 3D images using the processor. Another embodiment includes a method of autonomous vessel navigation based upon a predicted sea state and target location.

Systems and methods for sea state prediction and autonomous navigation in accordance with embodiments of the invention are disclosed. One embodiment of the invention includes a method of predicting a future sea state including generating a sequence of at least two 3D images of a sea surface using at least two image sensors, detecting peaks and troughs in the 3D images using a processor, identifying at least one wavefront in each 3D image based upon the detected peaks and troughs using the processor, characterizing at least one propagating wave based upon the propagation of wavefronts detected in the sequence of 3D images using the processor, and predicting a future sea state using at least one propagating wave characterizing the propagation of wavefronts in the sequence of 3D images using the processor. Another embodiment includes a method of autonomous vessel navigation based upon a predicted sea state and target location.

The invention discloses a strap down inertial navigation wave measurement method and system. The method comprises the following steps: 1, acquiring moving track data and moving attitude data of a carrier in a three-dimensional space along with waves; 2, performing strap down inertial navigation posture calculation on the moving track data and the moving attitude data, thus obtaining an Euler attitude angle and an attitude matrix of the carrier, and obtaining an acceleration of the carrier under a natural geographical coordinate system according to the attitude matrix; 3, performing twice integration on the acceleration under the natural geographical coordinate system, and obtaining a displacement of the carrier; 4, performing zero-crossing wave statistics according to the displacement of the carrier, and indicating a direction with the maximum occurrence rate to be a main wave direction. According to the strap down inertial navigation wave measurement method, real-time sampling and calculation and outputting of attitude, speed and displacement information can be realized; meanwhile, the real-time observation capacity and the standardization of an instrument are improved, the instrument performance is improved, and the cost, the volume and the mass of the instrument are reduced.

The invention discloses a novel bionic lateral line sensor, which comprises a cilium housing, a cilium base rod, IPMC film sheets, extraction electrodes and a sensor housing. When an external flow acts on the free end of the cilium housing, the cilium housing generates mechanical deformation which can be transferred to the cilium base rod to cause deformation of the cilium base rod, deformation ofthe cilium base rod can lead to mechanical deformation of the IPMC film sheets, by using the IMC force electric effect, the IPMC film sheets can generate an induced voltage, and thus the magnitude ofthe external flow is calculated according to the collected induced voltage. The novel bionic lateral line sensor is adopted to be used for measuring the external flow, the cilium housing and cilium base rod are combined into one, the IPMC film sheets are used instead of strain gauges, and directly installed on the cilium base rod, the characteristics of integrated design, simple structure and convenient installation are achieved. Meanwhile, the novel bionic lateral line sensor can output the induced voltage accurately and obtain the flow velocity.

A device measures the high and low fluid levels of a fluid body. A housing has a shaft with a buoyant weight, the shaft protruding through a cap on the housing's top and capable of sliding through the cap. A first ring encompasses the shaft and is initially positioned immediately below the cap, while a second ring is positioned immediately above the cap. As fluid enters the housing, the shaft rises in lockstep with the fluid level causing the first ring to be pushed downwardly on the shaft and when the fluid level falls, the shaft falls causing the second ring to be pushed upwardly along the shaft. The distance between the rings is the amount of fluid level variation. A debris tube attached to the housing measures the upper limit of fluid level. Subtracting the amount of variation from this upper limit yields the lower fluid level limit.

The invention provides an ocean internal wave forecasting method based on machine learning and remote sensing data, and the method comprises the steps: firstly obtaining remote sensing image data containing internal wave features, carrying out the preprocessing, obtaining the spatial information and time information of an internal wave through extraction, and constructing an internal wave quasi-synchronous remote sensing image sample library; based on the internal wave quasi-synchronous remote sensing image sample library, constructing an internal wave propagation forecasting model by using multi-dimensional information fusion of a convolutional neural network and a convolutional long-term and short-term memory network to establish an ocean internal wave forecasting model, wherein the input of the forecasting model is environmental factors including water depth, ocean stratification, density difference and internal wave factors, and comprises an internal wave scale and initial wave crest line position data of the internal wave; and the output of the forecasting model is forecasting crest line position data of the internal wave. According to the method, internal wave remote sensingbig data mining is carried out by utilizing strong nonlinear mapping capability and multi-modal fusion capability of machine learning, and timely and accurate prediction of internal waves is realized.

The invention relates to a method for inverting sea wave height and period based on water pressure, comprising: using a water-pressure-type wave height meter to measure underwater pressure intensity to obtain water pressure intensity time-series data; subjecting the water pressure intensity time-series data to Flourier transform to obtain a pressure spectrum; calculating pressure correction coefficient of sea wave by considering linear trend change of water pressure and attenuation of pressure wave in depth under water-layer filtering effect, and correcting the water pressure; inverting sea wave height and period of high temporal-spatial resolution according to spectral moment method or by subjecting the pressure spectrum to Fourier inverse transform and using zero-crossing separable wave method.

The invention discloses an X wave band radar based navigation and wave detection integrated system. The system includes a display console, an antenna and a servo transceiver unit which are connected in order. The display console includes a host unit, a display unit, a control unit, and a ship power supply. The host unit is connected to the display unit and the control unit. The host unit includesa radar mainboard, a radar control board, a signal processing board, and a power supply module. The radar mainboard is connected to the radar control board, the signal processing board, the display unit, the control unit, the ship power supply, and the servo transceiver unit. The servo transceiver unit includes a servo unit and a transceiver unit. The servo unit includes a motor transmission device and an azimuth and ship bow pulse forming circuit which are connected in order. The transceiver unit includes a performance monitor, a transmitter and a receiver which are connected in order. The system integrates navigation and wave detection functions, is suitable for a shipborne mobile and offshore platform and shore-based fixed applications, and meets the requirements of maneuver detection and nearshore detection.

The invention relates to the technical field of ocean observation, in particular to an ocean wave observation buoy system. The ocean wave observation buoy system comprises a server and a plurality ofbuoys, wherein the buoys comprise shells, three-axis accelerometers, communication modules, memories, positioning modules, batteries and MCUs; the shells are sealed shells drifting along waves on thesea surface; the three-axis accelerometers, the communication modules, the memories, the positioning modules, the batteries and the MCUs are all installed in the shells; the tri-axial accelerometers,the communication modules, the memories and the positioning modules are all connected with the MCUs; and the communication modules establish communication connection with the server. The ocean wave observation buoy system has the real effects that a three-dimensional motion track of buoy drifting with the sea waves is obtained by combining data of the positioning modules with the three-axis accelerometers, after sufficient data is accumulated, the wave height, wave direction and wave period data in the sea area can be mastered, and the observation task is completed.

The invention discloses a wave monitoring system and a method for operating the same. The wave monitoring system comprises wave monitoring devices, an external circuit, a data acquisition device and aPC (personal computer). The wave monitoring devices are sequentially connected to the PC by the external circuit and the data acquisition device; the wave monitoring devices comprise matrixes, electrodes, polytetrafluoroethylene films and wires, the electrodes cling to the outer surfaces of the matrixes, and the polytetrafluoroethylene films cling to the surfaces of the electrodes. The wave monitoring system and the method have the advantages that movement states of waves at the locations of certain points and wave information of the surfaces of ship hulls and ocean engineering equipment canbe monitored by the wave monitoring system in real time, and information comprises wave frequencies and amplitude; voltage signals can be generated at two ends of a resistor in the external circuit and can be outputted on the basis of solid-liquid contact charging principles of friction nanometer power generators when water moves to the surfaces of the wave monitoring devices, outputted signals can be acquired, processed, displayed and stored by the data acquisition device and the PC in real time, and accordingly the movement states of the waves on the surfaces of the certain points, the shiphulls and the ocean engineering equipment can be monitored by the wave monitoring system in real time.

The invention discloses a tidal bore monitoring method based on machine vision. The tidal bore monitoring method comprises the following steps: acquiring a water surface video sequence image by utilizing monitoring equipment; performing background elimination processing on the acquired water surface video sequence image to obtain a foreground image; performing foreground ripple noise suppression processing on the foreground image; carrying out tide head line detection on the foreground image subjected to foreground ripple noise suppression processing; and based on the acquired tide head line information, performing measurement and speed estimation on the distance of the tide head line. The method can be used for online monitoring and early warning of the tidal bore, has the advantages of being high in program efficiency, obvious in background interference suppression, prominent in tide head line outline, high in detection precision, high in real-time performance and the like, solves aseries of problems existing in the prior art, and has a better tidal bore monitoring effect.