Hydrospace detection equipment
Author Nicholas  Visit 2554   Add Time 2014-7-21 Print

    Hydrospace detection equipment or hydrology product distributors; marine survey service providers; The target company is an oceanographic survey instrument provider. At present, the objective of oceanographic survey focuses on marine resources, environment, geological structure, biogen, regional oceanic environment status and areas related to military and space technologies. At the same time, exploration to certain degree remains important, mainly to detect unknown ocean phenomena and explore the vast unknown sea area.


    Classified by discipline, it includes oceanographic hydrological observation, maritime meteorological observation, sea water chemistry element survey, ocean acoustic/optical element survey, oceanic life survey, marine geology and geophysical survey, submarine topography and physiognomy survey, oceanic geotechnical investigation, etc. As a whole, the equipment can be classified into two parts, survey bearer platform and survey instrument. Observation (survey) platform refers to the carrier instrument (acoustic, optical and electrical) used to accomplish the survey mission, carrier for personnel and means of delivery, such as satellite, plane, vessel, buoy and underwater vehicle (including manned submarine, ROV, AUV, etc.). Survey instrument refers to specific instrument used to accomplish certain observation mission or observation element. Such as ADCP, CTD, multi-beam sounder and magnetometer. Specifically:


    I. Oceanographic Survey Platform


    A) Space Base and Vacuous Base: Including satellite (oceanographic satellite), plane (manned and unmanned) and airship, for observation of water surface target;


    B) Water Surface: Including oceanographic vessel, platform, buoy, etc., for observation of targets on water surface and in water and seabed using acoustic method; optical method mainly used in special measuring mission or used as supplementary means.


    C) Underwater Submersibles, including manned underwater vehicle, ROV and AUV, seabed observation network, seabed spaceport, etc. The submersibles mainly have to deal with precise measurement, sampling or engineering work of seabed targets. As a kind of underwater platform applied widely in recent years, the submersibles themselves belong to transport vehicle. Besides their own reconnaissance devices, the submersibles should also carry other instruments and convey them to the specified location for work. With the dead weight up to a few tons, large submersibles can carry the instruments up to hundreds of kilograms for deep ocean work; small submersibles light in dead weight usually work at the depth of hundreds of meters. Having the ability of autonomous underwater navigation, the submersibles can serve for a broader purpose than the towed vehicles of video recorder (camera) for fixed target under water, really the first choice for the underwater engineering (underwater installation or inspection) or precise detection and sampling which require high for overhaul of optical cable and pipeline, orientation of drilling wellhead, detection and search of submarine target, etc.


    The submersibles can be classified into four categories: (1) remotely operated vehicle (ROV, underwater robot); (2) autonomous underwater vehicle (AUV); (3) fiber optical micro cable (FOMC) autonomous remote vehicle (ARV); (4) manned underwater vehicle.


    II. Marine Survey Instruments;


    A) Geophysical Survey Equipment:
  

    Bathymetric survey, acoustic measurement of bathymetric survey, generally classified in simple beam and multi-beam;
  

    Side scan sonar and synthetic aperture sonar scanning the seabed condition to judge the composition of seabed materials and whether there is any obstacle;
  

    Sub-bottom profile probing and electromagnetic pulse double-sound-source profile system sub-bottom profiler: measuring the geological structure of sub-bottom, e.g. the depth of bottom silt; obtaining a strata profile by working for a line; Electromagnetic pulse double-sound-source profile system: the high-power and high-precision system for deep-sea bottom stratum structure measurement and analysis, leading the world in the depth of penetration and accuracy of measurement;
  

    Gravity, magnetic measurement, earthquake, and Marine gravimeter: Gravity measurement is very important to military affairs. It is used to measure the small variation of gravity at the route; Marine magnetometer: measuring the change of submarine magnetic force to judge the metal content and metal object of bed rock;

 

    B) Environmental Survey Equipment;


    Marine environment survey mainly deals with the water body, which includes the spatial distribution of the elements such as dynamic characteristics, thermohaline, water color, turbidity and transparency, the temporal and spatial variation, the surface meteorological elements, etc. The air-sea interface belongs to the category of environmental survey, concerns the basic conditions of the sea and is the survey of basic oceanographic data. This survey does not only understand the spatial distribution of the elements, but also provides the basic data for nearly all marine
disciplines such as marine geology, biology and chemistry, having an important statusin oceanographic survey.


    Survey equipment mainly include buoy, ADCP, CTD.

    CTD survey meter: to measure ocean temperature, salinity and depth parameter, which can carry the sensors of dissolved oxygen, pH, turbidity, sound velocity profileand chlorophyll and supports water sampling by layer. Moored buoy observation system: a mooring system consisting of bottom ballast, acoustic release transponder, ball float, steel rope and observation apparatus, mainly observing the coastal bottomcurrent or mid-depth current, thermohaline, acoustic elements, etc.


    C) Sampling & Working Equipment

 

    It includes geological, biological and chemical sampling, for the purpose of acquiring the samples; including multi-tube sampler, deposition acquirer (placed to the sea bottom by mooring to collect the deposition into the sample bottle by filter cone; automatically replacing another bottle at set intervals), deposition truth-preserving sampler, gravity-piston type sampler, trawl, small box sampler, big box sampler, shallow drilling, TV grab, sub-bottom corer, etc.


    D) Acoustic and Optical Survey


    E) Seabed Camera and Video Recording Color deep-sea video camera delivering by dint of towed vehicle and coaxial cable winch with the altimeter feeding back the distance to the bottom, the underwater computer responsible for real-time compression and transmission and the receiving terminal decompressing and video recording; obtaining the full view of the sea bottom by working for a plane.


    F) Others Pinger, acoustic release transponder, ultra-short baseline, mooring, etc.

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