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3386 results about "Underwater" patented technology

The Underwater environment refers to the region below the surface of, and immersed in, liquid water in a natural or artificial feature (called a body of water), such as an ocean, sea, lake, pond, reservoir, river, canal, or aquifer. Some characteristics of the underwater environment are universal, but many depend on the local situation.

Gps-based underwater cable positioning system

A GPS-based underwater cable positioning system for use in determining the shape and position of hydrophone streamers towed underwater behind survey vessels involved in marine seismic prospecting. The system includes a plurality of surface units towed behind the vessel. Each surface unit includes a GPS receiver to receive radio frequency GPS signals and to determine its positions. Each surface unit also has an acoustic transmitter to transmit an acoustic message signal representing its position and an optional time stamp into the water. Acoustic receiver units, attached spaced apart locations along one or more streamer cables, each include an acoustic receiver to receive the acoustic message signals from the surface units and to determine its position from the message signals. To augment the message signals from the surface units at locations distant from the surface units, acoustic transceiver units may be used. The acoustic transceiver units are attached to the streamer cables at ranges between the surface units and distant acoustic receiver units. The acoustic transceiver units each include an acoustic receiver that performs as the receivers in the acoustic receiver units and an acoustic transmitter to transmit acoustic message signals representing its position and an optional time stamp into the water to be received by the acoustic receiver units. In this way, the positions and shapes of towed streamer cables can be determined.
Owner:INPUT OUTPUT INC

Underwater unmanned ship control system

InactiveCN106530660ARealize long-distance communicationTransmission systemsClosed circuit television systemsUnderwaterEngineering
The invention discloses an underwater unmanned ship control system. The underwater unmanned ship control system comprises a sealed underwater unmanned ship with zero buoyancy and a water control terminal. A controller, a driving module, a fish finding module and a communication module are arranged in the underwater unmanned ship, the driving module, the fish finding module and the communication module are all connected with the controller, the fish finding module sends a fish finding result to the controller, the controller uploads the fish finding result to the water control terminal through the communication module, the controller uploads the fish finding result of the fish finding module to the water control terminal through the communication module and receives a control command sent by the water control terminal, work among all the modules is adjusted according to the control command, and the driving module is used for driving the sailing direction of the underwater unmanned aerial vehicle. A diving fishing or fish catching function can be achieved, the fish finding module is arranged on the unmanned ship, underwater objects are detected, certain depth diving can be achieved, the fish finding module is used for underwater image collection, remote communication with a bank side can be achieved, and underwater image information is fed back in real time.
Owner:POWERVISION TECH

Optical fiber temperature-depth diving mark continuous measuring system

The invention relates to marine hydrology parameter monitoring, and particularly discloses an optical fiber temperature-depth diving mark continuous measuring system. The system comprises a communication buoy, a main floating ball, an instrument bin, a demodulating system, a temperature-depth chain, a mooring rope, an acoustical releaser and an anchoring weight, wherein the communication buoy comprises a solar cell, a big dipper communication plate card and a satellite combined antenna; the demodulating system comprises a demodulation module and a lithium battery and is arranged in the instrument bin, and the temperature-depth chain integrates a temperature sensor and a pressure sensor for measuring temperature and pressure, and the communication buoy, the main floating ball, the instrument bin, the temperature-depth chain, the releaser and the anchoring weight are successively connected through the mooring rope. The optical depth diving mark continuous measuring system provided by the invention has the advantages that the high density, real time, continuation and long-term observation of a temperature-depth vertical section from a sea surface to 500m underwater are realized, the data is exact and reliable, and the economic benefit is high; the optical fiber temperature-depth diving mark continuous measuring system is widely applied in different marine observation operations and provides a novel observation means for measuring sea temperature-depth.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI

Underwater LED (Light-Emitting Diode) long distance communication system based on visible light

ActiveCN105680941AOvercoming the defects of low speed and low bandwidthHigh bandwidthClose-range type systemsLow speedData acquisition
The invention discloses an underwater LED (Light-Emitting Diode) long distance communication system based on a visible light. The system comprises a transmitting device and a receiving device which are arranged underwater and respectively used for performing waterproof packaging; the transmitting device specifically comprises a data acquisition module, a transmitting end digital signal processing module, a digital to analog conversion module, a transmitting end amplifier equalization module, a direct current bias module and a light source; the receiving device specifically comprises an optical receiving module, a receiving end amplifier equalization module, a filter module, an analog to digital conversion module, a receiving end digital signal processing module and a data recovery module. The underwater LED long distance communication system based on the visible light provided by the invention can overcome the attenuation influence of an underwater environment on an electromagnetic wave and the disadvantage of low speed and low bandwidth of a sound wave, improve the transmission rate, increase the data carrying capacity, enhance the security, reduce the interference effect, reduce the equipment cost and power consumption, and realize high speed, high bandwidth, high security, and anti-interference underwater wireless optical communication.
Owner:UNIV OF SCI & TECH OF CHINA

AUV data collection method in underwater wireless sensor network based on seawater layering

The invention discloses an AUV data collection method in an underwater wireless sensor network based on seawater layering. The AUV data collection method comprises: layering of the underwater wirelesssensor network is carried out through an oceanographic model; for different layering, different data collection strategies are adopted; an AUV cruises according to a predetermined path on a surface layer having relatively high mobility; a sensor node performs data forwarding by dynamically selecting a forwarding set at each hop through the factors, such as the forwarding probability and the residual energy, so that the data forwarding reliability of a mobile node is enhanced; simultaneously, in a lower-layer network, the node forms an AUV stop point through initialization operation includingaggregating, and then clustering; an AUV track is planned through a shortest path algorithm; data in the network is collected by utilization of the AUV used as an auxiliary tool; simultaneously, the energy consumption of the AUV is considered; therefore, the whole algorithm accords with a practical condition better; the cruising path of the AUV is reasonably planned; therefore, the data forwardinghop number is reduced; the energy consumption of the network is reduced; the problem that the energy consumption is non-uniform can be partly solved; and thus, the survival time of the network is prolonged.
Owner:HOHAI UNIV CHANGZHOU

Underwater target three-dimensional reconstruction method based on line structured light

The invention discloses an underwater target three-dimensional reconstruction method based on line structured light. The method includes the following steps that a, an underwater two-dimensional image including depth information is acquired; b, enhancement processing is conducted on the underwater two-dimensional image; c, noise reduction processing is conducted on the two-dimensional image acquired in the step b; d, image edge detecting and image shape processing are carried out on the two-dimensional image acquired in the step c, and the center of each laser streak is extracted; e, the two-dimensional image acquired in the step d is calibrated; f, three-dimensional coordinates are acquired from the two-dimensional image acquired in the step e; g, the three-dimensional coordinates are reconstructed through computer high-level programming languages, namely visual underwater target three-dimensional information is obtained. By means of the underwater target three-dimensional reconstruction method based on line structured light, the influence on detecting precision because of suspended matter in water, light absorbing and scattering by seawater, uneven light fields and the like can be effectively lowered, wide-angle and long-distance underwater target three-dimensional information extraction is achieved, and underwater long-distance high-precision real-time target three-dimensional detection is realized.
Owner:QINGDAO UNIV
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