165 results about "Internal wave" patented technology

The invention relates to a multi-sending and multi-receiving acoustic measurement method for oceanic internal waves. According to the method, sound wave signals with frequency bands are sent through an internal wave measurement device, travel time of the sound wave signals with the frequency bands in the vertical direction in seawater is measured, after influences of a factor of background environmental is removed, echo time disturbance is obtained and combined with dynamics property of the internal waves, the relation between the echo time disturbance and the amplitude of the internal waves is built, so that change of crucial hydrology parameters such as temperature, salinity and flow rate of whole water depth caused by the internal waves is obtained, and therefore the purpose of observation on the oceanic internal waves is achieved. The multi-sending and multi-receiving acoustic measurement method for the oceanic internal waves can be widely used for the observation on the oceanic internal waves, particularly for the observation on internal waves in a deep sea.

The invention relates to the technical field of hydrodynamic experiment and search, and more specifically, relates to a nonlinear and multidirectional irregular wave and internal wave generating system and a control method therefor, wherein the system is used for generating high-precision nonlinear multidirectional irregular waves and internal waves in a pool. The system based on vertical multilayer and horizontal multi-plate control comprises a test pool (comprising a wave absorbing segment), a computer control drive system, a mechanical transmission system, a wave generating plate system (vertical multiple plates and horizontal multiple groups), and a wave height monitoring system. There are two fluid layers with different densities in the test pool during wave generating, or there is one fluid layer in the test pool otherwise. The system achieves the simulation of the nonlinear and multidirectional irregular waves and internal waves in the pool through the simultaneous control of a plurality of groups of horizontally arranged vertical multi-plate wave generating mechanisms and the different nonlinear vertical speed distribution of the two fluid layers or the single fluid layer, is higher in accuracy and precision, and meets the requirements of different tests.

The invention discloses an experimental system with interaction of an internal wave and a submerged body. The system comprises a submerged body model, a motion simulation assembly, a motion recordingassembly and an experimental groove; the submerged body model comprises a submerged body housing and a first balance weight, and the first balance weight is arranged in the submerged body housing. According to the system, the submerged body can perform rotation in three directions relative to a connecting rod by using the connection of a spherical hinge universal coupling, the rotary angular speedin X, Y and Z directions of the submerged body is recorded in real time by using a three-way electronic gyroscope, the acceleration in the X, Y and Z directions of the submerged body is recorded, thewave force of an inner solitary wave in the X, Y and Z directions on the submerged body and the connecting rod in the proceeding process of the inner solitary wave is recorded by using three pressuresensors, recording results are further transmitted to a display through guiding wires, and force measuring data is displayed in real time and recorded in a data file.

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.

The invention discloses an oceanic internal wave prewarning method based on online monitoring data. The method comprises the following steps: (1) data processing, namely acquiring ocean current flow rates Ft of a point A which is a certain distance from a working platform at different times t and different number of layers l, and successively performing de-noising processing and background flow removing processing on the acquired ocean current flow rates Ft to obtain ocean current flow rates Ft,l''; (2) judging the ocean current flow rates Ft,l'', namely when the ocean current flow rates Ft,l'' meet the conditions of internal waves, judging that the internal waves appear, and when the current flow rates Ft,l'' do not meet the conditions of internal waves, judging that the internal waves do not appear; and (3) if the internal waves appear, outputting internal wave information and alarming at the same time. The invention also discloses a prewarning system employing the method. The scheme is low in cost, and can be used for realizing internal wave monitoring of a fixed point for a long-term continuously, and realizing automatic internal wave judgment and precise pre-warning within 2-8 hours.

The invention relates to a microwave heater for heating liquid and/or gases, which consists of a heating chamber, a microwave generator and a temperature measurement and control system, wherein the heating chamber consists of three functional layers, namely an external wave-reflecting heat-conducting metal shell, a medium wave absorbing and heating layer and an internal wave-transmitting thermal insulation layer. The microwave heater is characterized in that: after passing through the thermal insulation layer, microwaves emitted by the microwave generator are absorbed by the wave absorbing and heating layer for heating; and heat is transmitted outward to the metal shell which transmits the heat to surrounding liquid and/or gases to realize the heating of flowing or static liquid and/or gases at last. The microwave heater unit with the structure can be used singly or a plurality of microwave heater units are used in serial and/or parallel connection. The microwave heater has the advantages of simple structure, low manufacturing cost, high thermal efficiency, easy replacement, maintenance and carrying and high safety due to non-contact heating, and can be used as a heat source in various fields such as large and small shower water heaters, hydrothermal heating, hot air heating and industrial production.

The invention provides a guide type air cylinder balance submarine pipeline access device and method. The guide type air cylinder balance submarine pipeline access device and method are applied to access work of a submarine pipeline. The submarine pipeline access device implements prefabricating and drilling of the submarine pipeline and the work flow of guide type air cylinder balance centering, butt joint and access according to the guiding effect of guiders and hoisting riggings symmetrically distributed on the two sides of an air cylinder, the balance effect of the horizontal air cylinder and the propelling power provided by hydraulic pushers and through the combination with the split type thick wall cylinder body structure of a submarine pipeline access apparatus. The horizontal multi-cylinder-body series connection structure is adopted for the air cylinder so that the oscillation loads, transmitted through hoisting ropes, of sea waves and internal waves can be balanced. By means of combination of the guiders and the guide riggings, the guide action is achieved, and the access device is accurately guided to a hole forming portion of the submarine pipeline. By means of the hydraulic pushers, fine adjusting and centering of the submarine pipeline access device and the access pipe section hoisting position are achieved. The submarine pipeline access apparatus provides a fulcrum for a hole forming device, plays a role of a tee joint and is used as the access point of a new submarine pipeline. The hole forming device completes the hole forming work of the submarine pipeline.

The invention discloses an ocean internal wave forecast method based on a synthetic aperture radar image and an internal wave model and relates to the technical field of physical oceanography and information processing. The ocean internal wave forecast method comprises the following steps of: building a two-dimensional transmission model based on the ocean internal wave according to an ocean internal wave parameter inverted from an ocean internal wave image of a satelliteborne synthetic aperture radar as well as submarine topography data and pycnocline historical distribution of a region where an internal wave exist; forecasting a position, a shape, a speed, an amplitude and wavelength information of the ocean internal wave after a certain time; and drawing an internal wave ridge line distribution graph at a certain moment when forecast is required according to the acquired information. The internal wave forecast method is simple and reliable.

The present disclosure relates generally to systems for providing a durable water-resistant and fire-resistant foam-based seal in the joint between adjacent panels. A fire-resistant and water-resistant expansion joint seal is provided which includes one or more foam members and a plurality of intumescent members interspersed within the foam member or members to provide a spring recovery force and fire resistance.

The invention relates to an ocean internal wave velocity monitoring method. The method particularly comprises the following steps that S1, remote sensing images comprising internal wave information are preprocessed; S2, a preprocessed SAR image and a preprocessed MODIS image are enhanced through a standard tensile method; S3, the internal wave position and the distribution message are extracted from the enhanced MODIS image and the enhanced SAR image; S4, spatial interpolation is carried out on an MODIS internal wave crest line with low precision; S5, the internal wave velocity is extracted; S6, the precision of the internal wave velocity is verified. The ocean internal wave velocity monitoring method has the advantages that the internal wave velocity is extracted through the satellite microwave remote sensing image and the optical remote sensing image, the extraction precision is high, the cost is low, time and labor are saved, multiple data sources are provided, the spatial distribution of the internal wave velocity within a certain sea area can be obtained, and then research on the aspect of correlation between the internal wave velocity and environmental factors can be expanded.

The invention discloses a laboratory internal wave and internal solitary wave making device which includes a water tank, a bracket and a rack. Slide rails are respectively arranged on the upper ends of the left and right walls of the water tank. The two sides of the lower end of the bracket are in sliding connection with the slide rails through two movable sliders. The movable sliders are fixedly connected with bracket. A vertical connecting rod is arranged on the upper end of the bracket. Two fixed sliders are arranged along the axis of the vertical connecting rod. The gear is provided with a vertical slide rail matching the two fixed sliders on the side away from the rack sawteeth. The vertical slide rail and the rack are welded together. A servo motor for driving the vertical slide rail to move to or away from the water tank along the vertical direction is also arranged on the bracket. A pumping plate or a cylindrical thrust box is arranged at the lower end of the rack. The extending direction of the slide rails is perpendicular to the plane where the pumping plate is located. The axis of the cylindrical thrust box is perpendicular to the left and right walls of the water tank. The laboratory internal wave and internal solitary wave making device has a simple structure, is convenient to operate, and can be switched between internal wave making and internal solitary wave making through the pumping plate and the cylindrical thrust box.

The invention provides an internal solitary wave acting force characteristic analysis method considering a background flow field, and the method comprises the following steps: step 1, carrying out thenumerical simulation of a South China sea circulation through employing a three-dimensional ocean numerical model; step 2, establishing an internal wave numerical value water tank; and step 3, determining the effect of the internal wave on the ocean structure through the internal wave numerical value water tank and the ocean structure network model which consider the background process. Accordingto the invention, the problem that the background flow field cannot be considered in the internal wave wave-generating method is solved. The internal wave ocean mode, the internal wave computationalfluid mechanics method and the internal wave acting force theory method are combined together for the first time, and a complete calculation system of the internal wave generating method and the forcemeasuring method considering the background flow field is formed. According to the method, the effect research of the internal waves on the structure is closer to the actual situation, and the methodcan play a role in guiding the safety load calculation and the structure design of the offshore structure.

The invention discloses a real-time monitoring apparatus for ocean internal waves. The real-time monitoring apparatus consists of an auxiliary floating body, a main floating body and a temperature measurement device, wherein ocean temperature parameters in vertical direction are measured through temperature-cascading chain between two underwater mooring platforms of the auxiliary and main floating bodies of the real-time monitoring apparatus for ocean internal waves. According to the real-time monitoring apparatus for ocean internal waves, a hardware circuit comprises a single chip, a calendar clock circuit, an A/D conversion circuit, serial communication circuits, an optical coupling circuit, a memory, a depth sensor, a drive circuit and a power supply module, the real-time monitoring apparatus for ocean internal waves in vertical direction can be measured through the temperature-cascading chain between the auxiliary and main floating bodies, besides, dynamic environment parameter monitoring for the ocean internal waves is realized through measurement of ocean currents by Doppler current meter, and satellite communications buoy above water simultaneously transmits related and real-time parameters back to shore stations.

The invention discloses a filtering method for sea surface stripe noise and sea surface stripe cloud in a moderate resolution imaging spectroradiometer (MODIS) remote sensing image. An original image of the MODIS remote sensing image in the same region and the same period is read from a hierarchical data format (HDF) file; the histogram equalization processing is performed for the original image; the image which is subjected to the histogram equalization processing is divided into sub-images with 300300 pixels; average gray values of all sub-images are evaluated; and thresholds are selected, pixels which are smaller than thresholds are pixels of the stripe cloud or the stripe noise, and pixels which larger than thresholds are pixels of a sea surface or a sea internal wave. The sea surface stripe noise and the sea surface stripe cloud in the MODIS image in a certain region and a certain period can be effectively filtered in a short time, basic information of the sea internal wave in the MODIS image can be effectively reserved, the method is simple and the processing efficiency is high.

The invention discloses a cable subsurface buoy real-time internal wave monitoring device. The device comprises a power supply, an industrial personal computer, a steel cable, a customized cable and a plurality of internal wave measurement probes, wherein the plurality of internal wave measurement probes are all composed of conductivity temperature depth systems and current needles, the customized cable is connected with the power supply and the industrial personal computer respectively, the plurality of internal wave measurement devices are arranged on the customized cable, and spaces are kept among the plurality of internal wave measurement devices, the customized cable is fixed on the steel cable, one end of the steel cable is fixed on a deck of a ocean platform and the other end is movably connected with a weight, and the customized cable is fixed on the deck of the ocean platform by an inclined steel cable. According to the invention, the internal wave monitoring device is constructed based on the ocean platform, so that the cable subsurface buoy real-time internal wave monitoring device installed on ocean platform is not easy to steal and lose, the safety of the measurement device is ensured; the real-time power supply of the measurement device and real-time data collection can be achieved; and compared with a self-contained subsurface buoy internal wave monitoring device, the cable subsurface buoy real-time internal wave monitoring device installed on ocean platform is greatly improved in the timeliness of data.

The invention discloses an underwater vehicle detecting method based on ship wake and submarine topography internal wave models, belongs to crossing fields of remote sensing technology, marine science and physical geography, and aims to provide a new method for detecting, recognizing and positioning underwater vehicle internal wave signals by using a wake internal wave model caused by motion of a sea surface ship and an internal wave model caused by submarine topography as constraints. The wakes and the internal waves caused by the water surface ship can be distinguished by detecting and recognizing the ship, the water surface ship can be detected and positioned by visible light images and infrared images, the internal wave mode caused by the submarine topography is relatively fixed and predictable, and the internal waves caused by an underwater vehicle are weak signals superposed to water surface internal wave signals and topographical internal wave signals; the surface ship is detected, submarine topography internal waves are constructed, interfering internal waves are filtered by the models, the internal waves of the underwater vehicle are highlighted, and then the underwater vehicle is detected and positioned.

The invention discloses an ultra-large floating structure which comprises multiple modules connected with one another. Each module comprises an upper deck, a lower floating body and hanging systems which are arranged between the upper deck and the lower floating body. According to the ultra-large floating structure, the hanging systems are installed between the upper decks and the lower floating bodies and can alleviate impact loads which are transmitted to the upper decks by waves through the lower floating bodies, attenuate vibration caused by the impact loads and control deformation among the modules on the ultra-large floating structure, the impact resisting and damping effects are good, the impact force caused by the waves and internal waves can be effectively reduced and buffered, and heaving, longitudinal shaking and transverse shaking of the decks can be effectively relieved.

The invention discloses a device and a method for destroying water temperature layering by internal waves generated by aeration induction in a layered lake reservoir. According to the device and method, a temperature controller is used for controlling starting and stopping an external air conditioner and accurately adjusting and controlling the temperature of water in a model reservoir, and further the water body at the bottom in the model reservoir is cooled by using an air-conditioning condensing pipe; meanwhile, an air compressor is used for conveying air to an air inlet of an aerator, and then conveying the air to an aeration chamber through diffusion holes of the aerator; when undissolved residual gas is gradually accumulated to the lower edge of a water sealing plate of the aeration chamber, gas in the aeration chamber can rapidly spill to an ascending barrel in the middle and carry the water body at the bottom to ascend; meanwhile, gas in the aeration chamber is accumulated again, and thus a periodic ascending water flow is formed in the ascending barrel; an outlet of the aerator is formed in a thermocline with temperature gradient, the water flow periodically flowing out from the outlet of the aerator can serve as an interference source which induces to generate internal waves in the model reservoir, and the water temperature layering can be efficiently destroyed by using the powerful mixing effect of the internal waves.

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 discloses a first modality internal wave generator. The first modality internal wave generator comprises a bottom plate, a slapping plate and a driving device, wherein a vertical support is fixed on the bottom plate, the middle of the side face of the slapping plate is hinged to the vertical support, a first track is fixed on the vertical support, and a firs sliding block is arranged on the first track; a second track is fixed on the bottom plate, wherein the second track is provided with a second sliding block; the slapping plate is provided with a first connecting plate and a second connecting plate, wherein one end of the first connecting plate is connected with the slapping plate in a sliding mode, and the other end of the first connecting plate is hinged to the first sliding block; one end of the second connecting plate is connected with the slapping plate in a sliding mode, and the other end of the second connecting plate is hinged to the second sliding block; the driving device is connected with the first sliding block or the second sliding block. By means of the movement of the slapping plate, the first connecting plate and the second connecting plate, thrust is generated on a water body only in the horizontal direction, vortex force is prevented from occurring to the water body, and the water body is pushed to generate first modality internal waves.

The invention belongs to the technical field of improvement and restoration of reservoir water ecology, and relates to a method for improving water temperature stratification characteristic of a channel reservoir tributary bay by internal wave. During a water temperature stratification period of the tributary bay, fluctuation is generated from letdown flow, and water level of a reservoir fluctuates, so that tide is formed at the estuary of the tributary bay. Tide type inflow and outflow are formed between the bay and a trunk reservoir and have shear effect at the thermocline, so that tide interval wave is generated near the thermocline. Water of the thermocline flows reversely since the tide internal wave transmits along the thermocline, so that alternate flow is generated, water temperature fields are mixed, and then water temperature stratification is improved. Deepwater reservoir equal-density stratification water is aroused to generate internal wave under reservoir regulation, andthus natural underwater stirring movement is formed. The method is easy to implement, has influence to large-scope water, improves water dynamic strength remarkably, suppresses water temperature stratification and achieves the purposes of improving water ecological environments.