32 results about "Sea trial" patented technology

The invention provides a releasing device for an underwater beacon used for dynamic positioning system sea trial. The releasing device for the underwater beacon used for the dynamic positioning system sea trial comprises the underwater beacon, a first connecting piece, a second connecting piece, a buoy, a first pressed iron and at least two second pressed irons, the first pressed iron is connected with the bottom of the underwater beacon, the two ends of the first connecting piece are correspondingly connected with the first pressed iron and the second connecting piece, the buoy is connected with the second connecting piece, and all the second pressed irons are connected with the first connecting piece correspondingly. According to the releasing device for the underwater beacon used for the dynamic positioning system sea trial, the structure is simple, using is convenient, position of the underwater beacon in the seafloor can be determined according to the method for water surface buoy positioning, the length of ropes needed to be released is determined according to boat length, boat width, water depth for the trial and area of water area for the trial, the method for manually releasing and refloating the underwater beacon is set, and safety of the whole trial process is guaranteed. The releasing method for the releasing device is simple in operating process, reliable in principle, and high in safety.

The invention discloses a sea test method based on an ocean fixed platform and used for ocean water quality instruments. The method includes: inspecting a to-be-tested instrument; mounting and arranging the to-be-tested instrument; collecting and analyzing a water sample; processing data; analyzing the data. The method has the advantages that the method can provide detailed sea test steps of the ocean water quality measuring instruments, field water sampling data is used as the comparison data, the use controversy of standard instruments is avoided, the data is real and reliable, and a data analysis method with long-term stability and reliability is provided; the method improves part of the content of HY/T 141-2011 Specifications for Sea Test of Oceanographic Instruments which is exiting ocean industrial standards, and the sea test steps and data analysis method which are applicable to the research-stage measuring instruments for measuring ocean water quality factor such as pH, dissolved oxygen and turbidity are provided.

The invention relates to an acoustic image data evaluation-based species discrimination method, which comprises the following steps of: (1) setting maritime test investigation elements, and obtaining acoustic image data through an echo detector; (2) eliminating sea surface noise and seabed noise, eliminating noise of the acoustic image data, and obtaining preprocessed acoustic image data; and (3) performing signal identification and target fish species identification on the preprocessed acoustic image data by adopting a frequency difference technology, and performing integral output on signals in an average volume backscattering intensity difference value range as target fish species. According to the invention, various noises can be effectively eliminated so as to achieve the purpose of finally accurately identifying species.

The invention provides an unmanned ship test system and method. The system comprises an infield test subsystem and an outfield test subsystem. The infield test subsystem is used for constructing simulation scenes of various environments and targets so as to realize equivalent test of the unmanned ship on-sea navigation and task execution processes; and the external field test subsystem is used for constructing a marine test field to carry out an external field test item and verifying an internal field test result. According to the invention, through the infield test subsystem and the outfield test subsystem, the equivalent test of the unmanned ship marine navigation and task execution process is realized, the marine test site is also constructed to carry out an outfield test project, and the infield test result can be verified through the marine test site. The unmanned ship test system provided by the invention meets the test requirements of the unmanned ship and fills the blank of unmanned ship test.

The invention provides a recovery system of a maritime test recovered body and an automatic cable cutting device. The recovery system comprises the automatic cable cutting device of the maritime test recovered body and a self-righting and separating device of the maritime test recovered body. In the automatic cable cutting device of the marine test recycling body, the rear end of a rear half clamping column is connected with one end of a rear steel wire rope, and the other end of the rear steel wire rope penetrates through a rope passing hole to be connected with a floater; the front end of the front half clamping column is connected with one end of a front steel wire rope, and the other end of the front steel wire rope bypasses the support longitudinal plate to be connected with a chopper. The automatic cutting device is simple in component parts, cable cutting can be rapidly, automatically and reliably achieved, and it is guaranteed that the recycled floating body is automatically separated and floats upwards. The self-righting separation device is simple in composition and easy to operate, and the marine test recovery body can keep a self-righting state in the ship inclined sinking process and can be separated from a ship body by means of self-buoyancy after entering water.

The invention provides a device for measuring seabed sand wave migration based on a triangular pressure sensor and a working method. The device comprises a penetration probe rod, a stabilizing frame and the triangular pressure sensor, and the working method comprises the steps: S1, acquiring data, and determining a laying sea area; S2, carrying out equipment preparation; S3, performing sea trial; S4 ,enabling the device to work; and S5, recovering the device. According to the technical scheme, the method can guarantee that the migration direction and speed of the seabed sand waves are inversed through the pressure sensor, and has the advantages that the sand wave period and wave crest and wave trough morphological characteristic parameters can be measured, the migration speed and direction of the sand waves can be measured, wavelength characteristics can be inversed through a mathematical method; compared with a traditional method, the method is simple in measuring principle, and various sand wave migration characteristic data can be obtained; and compared with a similar method applied in the past, the method provided by the invention can obtain the morphological characteristics and migration parameters of the seabed sand waves only by using one technology of the pressure sensor, and has good economical efficiency.

The invention belongs to the technical field of position measurement, and discloses an underwater electric field source rapid cross positioning method, which comprises the following steps: carrying an electric field measuring device on a water surface by using a carrying tool to move, measuring a horizontal component of an underwater electric field source by using the electric field measuring device, and positioning an underwater target. According to the invention, the underwater electric field source can be rapidly and accurately positioned, and the underwater electric field source can be rapidly positioned under the condition of low cost; the method can be used for positioning electric field sources such as submarine cable breakpoints and underwater current leakage points. The method is high in positioning precision, the laboratory test verifies that the positioning precision can reach 0.1 m, and the marine test proves that the positioning precision can reach 1 m. The system is simple and easy to operate, and the system core is an electric field measuring device which can be carried on various navigation tools such as speed boats and USVs. According to the method, the positioning speed is high, and accurate positioning can be realized only by rapidly navigating along the direction of a cable or other electric field sources at the beginning of positioning and navigating according to an orthogonal or large-angle intersecting track after an abnormal point is found.

The invention discloses a coastal small operation supporting ship. The ship is characterized in that the ship length (the length between vertical lines) is larger than or equal to 15 meters and smaller than 20 meters, and the total tonnage of the ship is larger than or equal to 50 and smaller than 100; the middle rear part of the main deck is an operation test area and is provided with supportingequipment for underwater operation and marine tests, and the supporting equipment is detachably fixed; the middle-front portion of the main hull is a living driving area and is provided with a rest room, a cab and a crew room. The ship has the beneficial effects that the ship is small and exquisite, complete in function and relatively low in investment and operation management cost; good safety, economy and applicability are realized. The problems that at present, scientific investigation, marine tests, underwater operation and the like are carried out in domestic coastal navigation areas, ship selection is difficult, ships are expensive, and no proper supporting equipment (supporting ship) exists are solved.

The invention provides a mine inertial navigation and magnetic compass error angle calibration and compensation method. According to the uniqueness principle of a state cosine matrix between two space coordinate systems, a calculation result obtained after measurement in a first state is used for calculation of a measurement result in a second state; the limitation condition of 90-degree rotation around the X axis does not exist between the two states of the mine in the Y-axis direction and the Z-axis direction, the requirements for calibration equipment and operation are simplified, and implementation is easy; a calibration result obtained by aiming at each mine is written into a trajectory control computer, and unification of azimuth and attitude references of a target detection system and a trajectory control system is realized through compensation, so that system errors caused by equipment installation are effectively eliminated, and the accuracy of the active attack mine to implement guidance attack on a target is ensured; and the method is verified by lake and sea tests at a certain model scheme stage.

The invention provides the evaporation waveguide correction model suitable for the stable condition, and the correction model improves the overall performance of the evaporation waveguide model by improving the prediction precision of the evaporation waveguide under the marine stable condition. According to the method, a new pervasive function is introduced into an evaporation waveguide model, a wind speed pervasive function in a momentum flux relation under a stable condition in an existing evaporation waveguide model is corrected, and temperature and specific humidity pervasive functions in a sensible heat and latent heat flux relation under the stable condition in the existing evaporation waveguide model are corrected; under the unstable condition, wind speed, temperature and specific humidity pervasive functions in the flux relation confirmed by marine test data are used.

The invention provides a self-righting and separating device for a marine test recycled body, which comprises a fixing frame, one end of a main shaft is fixedly mounted on the fixing frame, and a left-right rotating frame capable of rotating left and right around the main shaft is mounted at the other end of the main shaft; the left-right rotating frame comprises a transverse plate, a lantern ring is fixedly arranged in the middle of the transverse plate, and the lantern ring sleeves the other end of the main shaft; one ends of a pair of longitudinal rods are detachably mounted at the two ends of the transverse plate respectively, hanging basket mounting holes are formed in the positions, close to the other ends, of the pair of longitudinal rods respectively in the transverse direction, and the pair of hanging basket mounting holes are coaxially formed; and a pair of hanging basket rotating shafts are rotatably mounted in the pair of hanging basket mounting holes respectively, and the pair of hanging basket rotating shafts are fixed to the top of a hanging basket used for containing the offshore test recycling body, so that the hanging basket can rotate front and back. The device is simple in composition and easy to operate, and the marine test recovery body can be kept in a self-righting state in the ship inclined sinking process and can be separated from a ship body by means of self-buoyancy after entering water.

The invention discloses a deep-sea mining hose emergency separation and recovery device. The device comprises a fixing base, a lifting mechanism, a supporting seat, and a annular elastic slip; the lifting mechanism is arranged on the fixing base; the supporting seat is arranged at the lifting end of the lifting mechanism; the supporting seat is provided with an inwards-concave arc-shaped containing groove; the annular elastic slip arranged in the arc-shaped containing groove; the slip is provided with an elastic opening; and an elastic bolt is arranged on the elastic opening. The radius of the slip is controlled to be increased or decreased by controlling the tightness of the elastic bolt; and a flange pipe of a deep-sea mining hose is locked and fixed through the slip, the supporting seat is designed to provide a relatively stable working face for emergency disengaging of a hose connector, and meanwhile the emergency disengaging working face of the hose connector is made to ascend to the height convenient for a worker to operate by adjusting the lifting mechanism, so that the worker can quickly separate the hose connector, and potential safety hazards of safety operation and emergency treatment of offshore tests are reduced.

The invention discloses a deep sea mineral product full-hose conveying offshore test system which comprises a water surface operation platform, a flexible circulating pipe and circulating equipment, and is characterized in that the two ends of the flexible circulating pipe are fixed on the water surface operation platform, and the middle part of the flexible circulating pipe is arranged at an underwater collection depth to be tested; the flexible circulating pipe is further provided with monitoring equipment used for monitoring the state of the flexible circulating pipe, and the flexible circulating pipe is driven by the circulating equipment to lift a solid-liquid mixture at the underwater collection depth to be tested to one end located on the water surface operation platform. Then the solid-liquid mixture is conveyed to the other end of the flexible circulating pipe through circulating equipment and reaches the underwater collection depth to be tested through the flexible circulating pipe. The deep sea mineral product full-hose conveying offshore test system has the advantages of being simple in structure, easy and convenient to operate, real in test environment, reliable in test data, capable of being arranged for hose conveying and the like.

The invention provides an active sonar response method and a transponder, and the method comprises the steps: firstly, searching a sonar to emit a direct wave, measuring the frequency spectrum of a direct pulse signal, accurately determining the center frequency and bandwidth of an FIR band-pass filter according to the frequency spectrum, and accurately measuring the width of the front and rear edges of a pulse envelope through differential, generating a simulated target echo signal that is not affected by multipath and reverberation extension from a transponder internal signal. The beneficial effects of the invention are that the method solves a problem that the high-power transmission of conventional response output signals of a shallow sea marine test ship shell sonar cannot meet the calibration of the sonar performance detection precision; the flexibility of generating FPGA programmable signals in the transponder is utilized, the frequency, the pulse width and the bandwidth can be set at will, and the marine test efficiency is greatly improved.

The invention discloses a high-precision resistance-increasing pressure-adjusting control variable-diameter valve. The high-precision resistance-increasing pressure-adjusting control variable-diameter valve comprises a supporting pipe and a rubber pipe arranged in the supporting pipe, wherein the rubber pipe used for adjusting the size of a cross section of the rubber pipe is installed on the supporting pipe, a flange plate is fixed to an end portion of the supporting pipe, a driving device used for driving an adjusting device to move is fixed onto the supporting pipe, and the driving device pushes a sliding sleeve to slide in an axial direction of the supporting pipe. According to the structure of the high-precision resistance-increasing pressure-adjusting control variable-diameter valve, reconstruction of a pipeline needs to adapt to an original mining system as much as possible, the convenient recoverability is kept, the trial efficiency is improved, the high-precision resistance-increasing pressure-adjusting control variable-diameter valve is of a flange structure which can be embedded, all structures can be embedded into the original pipeline system, thus convenience is high, the difficulty degrees of detachment and additional installation are low, field welding is not needed, and the high-precision resistance-increasing pressure-adjusting control variable-diameter valve is suitable for a production system of sea trial ships; and the device (high-precision resistance-increasing pressure-adjusting control variable-diameter valve) can be additionally installed in sea trials at low water depths to adjust the pressure, and the device (high-precision resistance-increasing pressure-adjusting control variable-diameter valve) can be removed in production at high water depths.

The invention provides an underwater Christmas tree sea test operation risk evaluation method, which comprises the steps of S1, determining a basic event of a risk accident according to an underwater Christmas tree sea test operation program, and constructing a fault tree of underwater Christmas tree sea test operation; s2, evaluating the fault tree by adopting an expert scoring method, and performing fuzzification processing on an evaluation result to obtain a probability fuzzy number of the basic event; s3, calculating a fuzzy number according to the probability fuzzy number of the basic event, and calculating a failure probability of a top event of the fault tree according to the fuzzy number; and S4, carrying out sensitivity analysis on each basic event to obtain a critical importance coefficient and a probability importance coefficient of the basic event. According to the underwater Christmas tree sea test operation risk evaluation method, the evaluation result is closer to reality, more sufficient risk factor related data can be obtained, the method can be applied to underwater Christmas tree sea test operation risk evaluation, and the disadvantages of underwater Christmas tree sea test operation experience complementation in China can be complemented.