1061 results about "Sea level" patented technology

Methods and apparatuses for estimating a user's altitude with respect to the mean sea level are provided. According to some aspects, the present invention is able to estimate altitude in both open sky as well as in degraded GPS signal environments such as dense urban canyon environments where GPS performance is affected by fewer available satellites and / or multipath error. According to other aspects, the present invention uses data from a pressure sensor to estimate altitude, either with or without the use of GPS aiding data. According to further aspects, estimated altitude is integrated with other types of dead reckoning data to provide user context detection pertaining to changes of altitude.

Installation for harvesting kinetic energy of ocean currents in deepwaters is based on utilization of a semisubmersible platform and the multiple of vertically oriented Darrieus type hydraulic turbines with funnels. The turbines are located bellow sea level on distance sufficient to exclude them from being affected by wave actions. The electric power generators are located on a structure above water and transmit electric power to the shore utilizing flexible cable from semisubmersible to the sea bottom and underwater cable going to the shore, where it connected to the power distributing network. One of the Embodiments of this invention is designed to harvest energy of tides in deepwaters.

An arrangement and method for integrating a high pressure riser sleeve from the upper end of a high pressure drilling and workover riser terminated by an upper BOP close to sea level in one end and by a sub-sea blowout preventer BOP or a low riser package LRP close to the seabed in the lower end. The high pressure riser sleeve being installed, connected and integrated to the high pressure drilling and workover riser and extending up to and above the drill floor, inside a low pressure drilling riser slip joint which is connected to the drilling and workover riser. This relates to offshore drilling and well activities preformed from a floating drilling or workover rig or vessel. Operations can be switched from drilling with jointed drillpipe in a conventional manner, into performing underbalanced wireline and / or coiled tubing activities with full well pressure, much more effectively than with prior art.

A method of registering reconnaissance image data with map data is disclosed, comprising recording image data at a plurality of positions, together with the role, pitch and height above mean sea level data from an airborne navigation system and imaging system, and recording altitude of a reconnaissance craft from an altimeter; obtaining a difference between said recorded altitude data, and an altitude calculated from said navigation system data and a map data; selecting a difference data having a lowest standard deviation, and at a position of said selected difference data generating a three dimensional surface data using a bi-quadratic equation; generating a bi-quadratic surface of each of a plurality of positions for which data is recorded; generating a difference data between said bi-quadratic surface data, and height data obtained from said map, and minimising an error between bi-quadratic surface data and said height data by translating said position data relative to said map data, until minimum error is achieved; registering said image data with said map data after applying a said translation of said image data.

An Ultra Wideband (UWB) short-range radar system is used for the detection of targets in clutter. Examples of targets on the ground include human walkers, crawlers and runners, and vehicles. The UWB sensor can also be used to detect small approaching boats in different levels of sea clutter or airborne targets like hang gliders. One of the primary differences between this device and other UWB radar sensors is the manner in which the bias on the threshold detector is set as well as the logic circuitry used to find targets in clutter while maintaining a low false alarm rate. The processing is designed to detect targets in varying degrees of clutter automatically. There may be no front panel controls other than an ON-OFF switch. The system is lightweight, low-cost, and can be easily installed in minutes.

The invention discloses a kind of underwater GPS allocation and navigation system and method without high stable frequency scale. The system is made up of GPS satellite constellation, four or more GPS floating marks, underwater navigation transceiver, data control centre, sea level wireless communication loop and hydroacoustics communication loop. The method is: when the object underwater needed to be located, the underwater navigation transceiver sends out hydroacoustics localization signal to the GPS floating mark, the floating mark transmits the hydroacoustics localization signal, the GPS signal and the posture calibration data wirelessly to the data control centre, and the data are processed with the difference signal, works out the position and time sending out the localization signal of the underwater object, the position and time data are transmitted to the underwater navigation transceiver by the hydroacoustics communication system, it can carry on navigation or time service. The invention can be applied to underwater object tracing, underwater localization and navigation, underwater precise timer service, measuring project control and project structure sample, it needs no high stable frequency scale.

A display control device, having a processor structured for receiving terrain elevation information and samples of current position and altitude above ground data; and one or more algorithms resident on the processor for generating, as a function of the current position and altitude above ground data, one or more display control signals for causing a display device to display, in a monochromatic scale graduated as a function of terrain elevation relative to mean sea level, a strategic portion of the terrain elevation information extending between a minimum elevation of the strategic portion of the terrain elevation information and a pre-selected strategic altitude threshold less than the altitude above ground data.

The invention discloses an extraction device for undersea gas hydrate and an extraction method thereof, which is characterized in that the device is directly communicated with undersea (10) gas hydrate layer (9) through a hollow rigid body (2); or the hollow rigid body is communicated with undersea (10) gas hydrate layer (9) through layers of sand and clay (8) or impermeable bed (11); a water pump (4) and a test and supervisory equipment (5) are provided on one side of the hollow rigid body, the water pump is connected with a drain pipe (3) which is above the sea level (7) through a pipe, the test and supervisory system is connected with an image pickup system and a pressure testing system, and a gas collecting pipe (1) is arranged on the top of the inside of the hollow rigid body. The extraction method comprises the following steps: 1) a hollow rigid body is built on the sea separated with water, and the hollow rigid body is communicated with undersea gas hydrate layer; 2) water in the hollow rigid body is drained out via a water pump to lower the water height in the hollow rigid body and reduce the pressure acting on the gas hydrate layer and the gas hydrate is decomposed into gas and water when the pressure acting on the gas hydrate layer is less than the balance pressure; 3) the decomposed gas escapes upward, is discharged through the gas collecting pipe and is collected.

An integrated platform to house an ocean thermal energy conversion (OTEC) system that utilizes: (i) a cold water circuit consisting of a way of receiving and distributing the cold water from the cold water pipe (CWP) to vertical conduits housing the condensers into collectors that discharge via large pumps into open discharge channels connected to the discharge water pipe (DWP); (ii) a surface water circuit consisting of a way of collecting and distributing the surface water to vertical conduits housing the evaporators to surface water collectors that discharge via large pumps into the same discharge channels connected to the DWP; (iii) means of adjusting the buoyancy of the integrated platform by adding water as ballast into floatation chambers in the hull surrounding the discharge channels or in a plurality of either vertical or horizontal flotation chambers to provide protection to the CWP and DWP and stability to the integrated platform. By adjusting the buoyancy of the platform such that the collectors are about level with the sea level, pumping requirements are minimized.

A self-sufficient material property profile regulation method and system, for adjusting fluid property profiles such as in an ocean of multiple property layers, is described. Using this Fluid Property Regulator, the property profiles of a non-enclosed material, including property profiles related to material density, chemical characteristics and space-time position, are affected due to motion of the material relative to a body in the flow stream. The state of other matter with which the initial material then makes direct or indirect contact is also affected. For example, in the case of a liquid such as an ocean current, the temperature, salinity, nutrient content and other properties may be destratified (i.e. layers being combined) as the system lifts large quantities of deep water and combines this material with surface water in the downstream far-field region of the system. The resulting regulation of such ocean water property profiles may then also indirectly affect the properties of the atmosphere above the ocean so that the system can be said to affect planetary properties both oceanic and atmospheric. Rather than merely discharging a pumped material, such as cold water that might quickly re-submerge, the system regulates lasting property profiles. The new Fluid Property Regulator system described in this invention regulates material properties to produce desired outcomes such as increased food and energy production as well as to prevent undesirable outcomes such as hurricanes, elevated planetary temperatures, decreased planetary ice sheet size, raised sea level and glacial freshwater incursions that can halt important major currents.

A device for enabling access to a structure above ground or sea level, in particular a rotor blade of a wind turbine, by lowering and / or lifting the device in relation to the structure, the device including a frame structure,—means for supporting the device in relation to the structure, and—means for lowering and / or lifting the device in relation to the structure, where at least part of the frame structure includes a track portion, the track portion being adapted to guide an, in relation to the track portion, movable object along the track portion, where the means for supporting the device in relation to the structure are configured for positioning the device in relation to the structure, and the means for supporting the device in relation to the structure are configured for facilitating a movement of the device essentially in the longitudinal direction of the structure.

A power generating machine having a frame provided with a first support, a second support and a third support laterally and adjustably mounted between the first and second supports. A bellows is mounted under the third support and between the first and second supports. The bellows has a buoy mounted at a bottom of the bellows to adapt to be flush with sea level so that sea waves are able to drive the bellows to move up and down reciprocally. A first tube is mounted to communicate with the first tube and so as to allow air to be sucked in the first tube when the bellows extend. A second tube is communicated with the first tube so as to allow air flowing only to a tank connected to and communicating with the second tube to drive a pneumatic generator to generate electricity.

Systems and associated methods for planning and control of a fleet of unmanned vehicles in missions that are coordinated temporally and spatially by geo-location, direction, vehicle orientation, altitude above sea level, and depth below sea level. The unmanned vehicles' transit routes may be fully autonomous, semi-autonomous, or under direct operator control using off board control systems. Means are provided for intervention and transit changes during mission execution. Means are provided to collect, centralize and analyze mission data collected on the set of participating unmanned vehicles.

The invention discloses an energy self-supplying type multifunctional deep-sea net cage, which comprises a net cage (8) positioned in seawater and an anchoring system for connecting the net cage (8) with the seabed and further comprises an ocean energy power generation system, an automatic sedimentation system, an automatic feeding system and a remote monitoring system, wherein the ocean energy power generation system is installed around a frame of the net cage; the automatic sedimentation system is installed on a frame at the upper layer of the net cage (8); the automatic feeding system is installed in the centre on the top of the net cage (8); one terminal of the remote monitoring system is installed on the submarine net cage (8); the other terminal of the remote monitoring system is installed on an shore-side controller; and the two terminals are connected through a GPRS (General Packet Radio Service) network. After adopting the method disclosed by the invention, the energy self-supplying type multifunctional deep-sea net cage is capable of automatically feeding fishes in the net cage, remotely monitoring growth conditions of the fishes and damage conditions of fishing nets, being always the same as ascending and descending of the sea level, and automatically supplying electrical energy required for realizing the above functions.

The invention discloses foundation of an offshore wind generation facility, particularly a semi-submersible type steel structure mounting foundation platform of offshore wind driven generators which is capable of moving on the sea, is simple in manufacturing and low in cost. The semi-submersible anchoring type offshore wind generating set with an integrated pedestal is characterized in that: seven wind driven generators are mounted on a regular hexagonal semi-submersible type steel structure integrated foundation platform; the seven wind driven generators are mounted on semi-submersible foundation buoyant boxes 2 with cylindrical bottoms at the six vertexes and the centre of the regular hexagonal semi-submersible steel structure integrated foundation platform respectively; the overall generating set floats on the sea; and the bottom of the overall generating set is fixed by a submarine anchoring facility 5. As the overall integrated foundation platform is submerged in water, the water plane of the generating set is very small, as a result, the generating set has excellent stability, instantaneous buoyancy caused by sea level fluctuation changes a little, and no matter the generating set in a towing state in normal weather or in an anchoring state in extreme weather, both the rigidity of the stability of the generating set can satisfy design demands; and the size of the regular hexagon is determined by the minimum separation required according to the mounting specification of the offshore wind driven generators.

The invention provides a method for predicting tide-bound water level by combining a statistic model and a power model. The method comprises the following steps of obtaining a tidal harmonic constant; predicting the astronomical tide and water rising level; obtaining predicted tide-bound water level Ls based on the statistic model; calculating and obtaining predicted wind field results and open boundary conditions of the tide according to an atmosphere prediction model; taking the wind field results and the open boundary conditions as a forcing field; using an ocean dynamics model to calculate predicted tide-bound water level Lm containing the astronomical tide and the water rising level; establishing a best tide-bound water level prediction formula based on the veracity analysis on the prediction results of the two models under all time scale and meteorological condition; providing the prediction results on final tide-bound water level L; and displaying the prediction results in realtime by a visualized technology. The method organically couples with monitoring data of weather and sea level, the statistic prediction method of sea level values, an atmosphere and ocean dynamics model and a real-time visualized system so as to achieve the requirement of exactly and quickly predicting the tide-bound water level.

The invention discloses a sea surface wind measurement method based on an X-band marine radar and belongs to the technical field of marine dynamic environment remote sensing. The measurement method comprises three parts of radar image preprocessing, wind direction measurement and wind speed measurement. In the wind direction measurement indexes, image gradient, gray level and smoothing item are organically combined, the proportion of the image gradient, the gray level and the smoothing item is adjusted through proportionality factor and a model suitable for the sea surface wind characteristic is established, compared with the prior art, the wind direction measurement precision is improved by 68.4 percent. In the wind speed measurement indexes, when the radar is used for measuring individually, normalized radar cross section (NRCS), the actually measured wind direction and signal to noise ratio (SNR) serve as back propagation (BP) network input, compared with the traditional algorithm, the wind speed measurement precision is improved by over 84 percent. In the wind speed measurement indexes, sea boundary layer parameters serve as addition input of the BP network, so that the wind speed measurement precision of the marine radar can be further improved, and the measurement precision is improved by over 48 percent by taking air-sea temperature difference, salinity, sea level and atmospheric pressure into consideration.

Systems, apparatus and methods for populating and using a pressure database to determine an altitude of a unit with an unknown altitude are presented. A pressure from one or more barometric pressure sensors linked to respective base stations are interpolated to determine a reference pressure (e.g., at sea level) at arbitrary coordinates (x,y) having pressure reading. For example, a mobile station at the arbitrary coordinates (x,y) records a pressure at the mobile station. A difference between this pressure at the mobile station and the interpolated reference pressure is determined, which may directly be interpreted as a defined altitude of the mobile station.

A method for producing a digital topographic map, comprising the following steps of: a step for dividing a basic map, which is produced through UTM drawing method, into grid-like sectors at a predetermined distance, and further dividing the sector obtained into a smaller one (4), thereby producing small sectors while interpolating discontinuous data being in short between each sectors and within each of the sectors; a step for producing digital data by relating x,y coordinates of the small sector (4) obtained and a sea level obtained through measurement, upon basis of an algorithm having a rationality, and connecting the small sectors (4) being same in the sea level thereof with a straight line, thereby producing a first topographic map (5), on which contour lines (6) are formed with lines of segments; and a step for conducting a smoothing process upon the contour lines (6) of said first topographic map (5), mathematically, thereby producing a second topographic map (7), on which the contour lines (6) are formed with curved lines, being smoother than the contour liens (6) of said first topographic map, which are formed with the lines of segments, thereby enabling to obtain the digital topographic map, displaying the contour lines (6) with smoothly curved lines thereon.

The invention discloses an apparatus for integrated processing of natural gas hydrate exploitation by geothermy and waste CO2 reinjection. The apparatus comprises a producing well and an injection well. The producing well and the injection well pass through the sea level and a natural gas hydrate layer; both the bottoms of the producing well and the injection well are disposed in a geothermal layer; a gas-water separator, a gas collecting tank, a workshop, a second high-pressure pump unit and the injection well are connected to the top of the producing well in order; the gas-water separator is connected with a first high-pressure pump unit and the injection well in order; the top of the producing well is connected with a surface console. The invention further discloses a method for integrated processing of natural gas hydrate exploitation by geothermy and waste CO2 reinjection; renewable geothermal resources can be made full use, heat resources are widely ranged, the process of acquiring the heat resources is time and labor efficient, emission of CO2 in air is controlled, and greenhouse effect is controlled and the environment is protected; the problem that the terrible result, geological accident, is caused by stratigraphic consolidation decline caused by drop in stratum pressure is avoided.

The present invention relates to an offshore oil production platform. The platform includes a deck (12) and a sub-structure (10) comprising plurality of ballast chambers (20) and at least one of connecting leg (16) connected from the ballast chambers (20) to the deck (12). The ballast chambers (20) include at least one oil storage compartment (22), at least one ballast compartment (24) and at least one air pressure compartment (26). The oil and gas storage compartment (22) is for storing processed oil and gas. During installation of the platform, the ballast chambers (20) are ballasted with sea water (46) which allows lowering of the connecting legs (16) towards the sea bed (34). After the ballast chambers (20) reach the sea bed (34), locking means is actuated to a locked position to prevent movement of the sub-structure (10) of the platform. The deck (12) is moved up to a predetermined height from sea level by jacking means. After the oil is extracted, it is then processed and separated to processed oil and gas. The processed oil and gas are then stored in the oil and gas storage compartment (22). The oil and gas are then transferred to a buoy and then loaded to tanker vessels by connecting conduits. During the de-installation of the oil production platform, the ballast chambers (20) are de-ballasted whereby the sea water (46) in the ballast compartment (24) is flushed out. Thus, the sub-structure (10) of the platform moves upwards to reach the deck (12). When the base (14) touches the deck (12), the locking means is actuated thereby locking the sub-structure (10) together with the deck (12). Finally, the oil production platform is towed to its new destination for further extraction of oil.

The invention relates to a heating control method of an electric kettle and an electric kettle for realizing the heating control method. By judging whether water is boiled according to whether time increment delta t corresponding to a raised unit value delta T of water temperature reaches the limit time increment delta t0 preset in a memory cell when water is heated for the first time, whether water is boiled can be accurately judged. Simultaneously, the invention also stores boiling temperature Tf detected during the boiling last time in the memory cell, as long as the real-time water temperature T reaches Tf when boiling next time, water is judged to be boiled, and the long-time judgment of water boiling is not required to be repeated, therefore, the boiling time is effectively saved. The method and the electric kettle can be used in areas with various sea level elevations, not only can accurately judge whether water is boiled to avoid potential safety hazards, such as heating without water, but also has the advantages of energy conservation and high temperature-controlling precision.

The invention discloses a slurry marine gas hydrate mining method and mining device achieved by means of jet breaking and reverse circulation delivering. The method comprises the steps that a marine gas hydrate stratum is broken through a high-pressure water jet method, and a multi-phase slurry mixture is jointly formed by jet water, broken rock soil and broken hydrates; the slurry mixture is delivered to a decomposition device and a separation device which are arranged on the sea level through a reverse circulation method; reduced pressure decomposition, solid-liquid separation and gas-liquid separation are conducted on the slurry mixture through the decomposition device and the separation device which are arranged on the sea level, and gas, solids and liquid are obtained separately and utilized and collected accordingly. Devices used in the method comprise a rock jet breaking and slurrying system, a reverse circulation delivering system, a decomposition, separation and collection system and an auxiliary system. According to the mining device and method, the defect that in existing marine gas hydrate mining, the mining efficiency is low is overcome, the hydrate deposit utilization rate is increased, the mining cost is reduced, the economic benefit is increased, and quick and sustainable mining is achieved.

The invention relates to a flood combined probability analysis method and an application thereof based on Copula. The flood analysis method is aimed at providing a flood control construction basis for tidal river reach, and mirroring functions of affecting overflowing of flood facilities and characteristic quantity of regulation and storage capacity through creation of a joint probability distribution function about sea level, rainfall peak and subrainfall so that reliable basis is provided for anti-flood construction.

The disclosed detection method for boiling in an electric boiler comprises: (1) obtaining boiler temperature and variation rate; (2) comparing the rate with pre-set value; (3) if the variation less than pre-set value for a space, deciding it is boiling. Wherein, the detection device comprises: a thermistor as temperature sensor, a MPU, a capacitor and its charge / discharge circuit and level detection circuit all connected to the MPU. This invention is free to height above sea level, and benefit to obtain ideal cook effect.

The invention discloses a bottom-exploration zigzag-type deep sea submerged buoy system which comprises a spherical pressure-resisting cabin and a trigger action mechanism, wherein the bottom of the spherical pressure-resisting cabin of a submerged buoy body is provided with the trigger action mechanism, thus the submerged buoy which is vertically submerged to the bottom of the sea starts the trigger action mechanism at the instant of contacting the bottom, sea bottom sampling is finished and loads are released and thrown, the submerged buoy floats upward so as to complete the acquisition of vertical section information of a sea water column from the sea level to the sea bottom for the deep submerged section floating buoy; the spherical pressure-resisting cabin is formed by the connection of upper and lower semispherical end covers through bolts; the trigger action mechanism comprises an injector-type sampling mechanism, a throwing and loading mechanism and a deep bottom trigger mechanism; the top of the semispherical upper end cover of the spherical pressure-resisting cabin is provided with a thermohaline deep measuring transducer; and cameras are installed in camera holes which are uniformly distributed circumferentially on the semispherical lower end cover. The bottom-exploration zigzag-type deep sea submerged buoy system disclosed by the invention is simple in structure, low in cost and reliable in operation; and complete water column images and water quality information from the sea water level to the bottom of the ocean can be recorded, and substance sampling at the sea bottom can be realized, and a new prospect is developed in the applications of marine environmental monitoring for the deep submerged section floating buoy.