43 results about "Sand wave" patented technology

The invention relates to an apparatus and method for the in-situ real-time observation of submarine sand waves. The apparatus includes an observation system and auxiliary devices. The auxiliary devices comprise an auxiliary ship and a hoisting device; the observation system includes a gravity anchor, a fiber grating floating earth weight sensor, a Kevlar cable, an underwater acoustic releaser group, a lower floating ball bracket, a wave and tide gauge, an upper floating ball bracket, an MRU three-dimensional attitude sensor, a satellite communication machine, an imaging sonar, a solar cell anda main floating body. The principle of the apparatus and the method is characterized in that submarine pressure change caused by the migration of the submarine sand waves is observed, the time interval, elevation and wavelength data of two adjacent extreme submarine pressures are analyzed, and the migration rate of the submarine sand waves is calculated. The method includes the following steps: selection of an observation point and a deployment time, system deployment, recovery, and data processing. The apparatus and the method provide a new idea for the in-situ real-time observation of the submarine sand waves, have the characteristics of simple and easy device, long in-situ real-time measurement period and wide applicable water range, and can realize the in-situ real-time long-term observation of the migration of the submarine sand waves.

The invention discloses a method of hydrographic surveying and charting and submarine topography geomorphologic survey research, and particularly discloses a seabed sand wave geomorphology movement detection method based on MBES (multi-beam echo sounding). The method provided by the invention adopts a decimeter grade measurement accuracy multi-beam sounding technology and a sub-meter grade positional accuracy navigational positioning system, the movement rate and direction of the seabed sand wave geomorphology are obtained through preparation before seabed sand wave detection based on the MBES, the detection of the seabed sand wave geomorphology based on the MBES, a DDM (difference of depth of modulation) construction based on the MBES measured data, secondary detection and treatment as well as sand wave movement rate calculation. The invention provides an exquisite detection scheme of a seabed sand wave movement and a rapid construction method of seabed grids and further provides an exact calculating method of the movement rate of the seabed sand wave, the methods have the important application values for hydrographic surveying and charting, oceanographic survey and seabed scientific research in a seabed high active region.

The invention provides a multi-stage penetration type submarine sand wave in-situ observation device and method based on a resistivity feeler lever. The device comprises a support structure, a multi-stage penetration mechanism, an annular electrode resistivity feeler lever, and a matched observation apparatus. The principle thereof is as follows: penetration of the feeler lever is performed depending on a multi-stage penetration system triggered by characteristics of different stages of sand wave migration, observation of a potential value of a penetration region is performed through the feeler lever, a resistivity sudden change cross section elevation is extracted, and the change of a sandy seabed surface elevation with time is analyzed. The method includes implementation of the multi-stage penetration system and resistivity inversion submarine sand wave elevation change. According to the device and method, a new observation thought is provided for in-situ real-time observation of submarine sand wave migration, a new method is provided for penetration of medium and small submarine sand wave development areas, the device is simple and easy to use, and the applicable water area of in-situ real-time measurement is wide.

The invention discloses a device and experimental method for simulating influence on a pipeline project by seabed tide sand waves. The device includes an experimental sink and tide generating system,a terrain scanning system, a seabed pipeline simulation measurement system and a data acquisition and processing controller. The experimental sink and tide generating system is used for simulating seabed sand slopes and utilizing a water pump for forming reciprocating current. The terrain scanning system collects forms of the sand slopes by utilizing an ultrasonic topographic instrument and transmits data to the data collecting and processing controller. The seabed pipeline simulation measurement system utilizes optical fiber strain sensors arranged on the side walls of a pipeline model to collect pipeline deformation data, utilizes a high speed camera to collect pipeline displacement information and transmits the information to the data collection and processing controller. By adopting the device provided by the invention, experiments studying influence on the pipeline project by seabed tide sand waves can be conducted. According to the invention, the water pump is utilized for forming a periodically changing water current simulation tide field, in combination with the formation of tide sand slopes, influence on seabed pipelines by sand waves is simulated. The collected data is real and the reference value is high.

The invention discloses a new method for using remote sensing images to measure the sand wave water depth of shallow sea. The new method for using the remote sensing images to measure the sand wave water depth of the shallow sea uses the bright-dark stripe feature information of the shallow sea sand wave terrain presented in the remote sensing images and the quantitative relations among the space position thereof, intensity and sand wave water depth to measure the sand wave water depth of the shallow sea. According to the terrain change monitoring requirement for the broadly distributed shallow sea sand wave regions, by means of the large-scale coverage and high-frequency revisit ability of a remote sensing technology method, the gray data of the remote sensing images are quantitatively processed based on the bright-dark stripe features (comprising the strength and space distribution features of the bright and dark stripes) in the remote sensing images generated by the modulation of the sand wave terrain for the water body flow field and sea surface roughness, and moreover, the gray data are converted through a little of measured data to obtain the sand wave water depth information; the new method for using the remote sensing images to measure the sand wave water depth is used for monitoring the dynamic change of the underwater terrain of the shallow sea, is an innovation for using the remote sensing information technology for the shallow sea water depth measurement, and is very high in practical value.

The invention discloses a method for identifying pebble sand waves on upper reach channels of the Yangtze River. The method comprises the following steps that actual measurement of fundamental data is conducted on a channel to be distinguished, or the fundamental data are calculated and acquired by establishing a two-dimensional mathematical model of a river reach; the range of the water flow of the water reach is determined; the transport and distinguishing coefficient of bed loads in the range of the channel is calculated; whether pebble sand waves are generated or not nearby the channel in the range of an engineering river reach is judged according to a calculating result; counter measures are taken after the sand waves happen. According to the method, the movement rule of the pebble sand waves is systematically studied through indoor flume experiments and site inspection data analysis, the critical conditions of occurring of the pebble sand wave movement are obtained, an identifying technology for identifying whether the pebble sand wave movement occurs or not in the upper reach channels of the Yangtze River is provided, ships are effectively protected to navigate safely, and the problem of lacking the identifying method for the pebble sand wave movement currently is better solved.

The invention discloses a method for estimating a bed load sediment transport rate of a natural riverway. The method comprises the following steps: 1) acquiring boundary conditions; step 2) dividing sub-sections; step 3) calculating a riverbed resistance coefficient of each sub-section; step 4) calculating the average flow velocity of each sub-section; step 5) calculating the sand wave height and movement velocity of each sub-section; and step 6) calculating the bed load sediment transport rate of the whole section. According to the method for estimating the bed load sediment transport rate of the natural riverway, the bed load sediment transport rate under any flow condition can be rapidly and efficiently predicted, the defects of the traditional technology in the aspects of economic investment, data dependence and the like are overcome, and the method has wide universality and convenience in the field.

The invention discloses a method and a device for measuring the parameters of grait sand waves in the upper reaches of Yangtze River. The method comprises the steps of analyzing factors, which influence the sand waves, by a single factor way according to test data, and carrying out relationship fitting to obtain a sand wave height expression. The method provided by the invention is used for measuring the dimension and the movement velocity of the grait sand waves in the upper reaches of Yangtze River. The method comprises the following steps of: systematically researching the movement low of the grait sand waves according to an indoor flume experiment and site inspection data analysis, expressing the factors, which influence the movement velocity of the sand waves, by an equation, fitting the factors with test flume data to obtain an equation of the wave velocity, analyzing the factors, which influence the height and the length of the sand waves, by the single factor way according to the test data, and carrying out the relationship fitting to obtain the height and the length of the sand waves. The method and the device have great significance for judging the grait sand wave navigation obstacle characteristic and the grait sand wave beach risk governance, so that the maintenance management level of the channel in the upper reaches of Yangtze River and the whole trafficability of the channel in the Xu-Yu segment can be improved, and the quick development of the Yangtze river transportation can be promoted.

The invention relates to the field of seabed sediment sampling, and particularly relates to a seabed sand wave sediment sampling device and method. The device comprises an extracting part and a sampling part, wherein the sampling part is movably connected with the extracting part; the extracting part comprises a plurality of steel pipe connecting rods which are arranged in parallel in the verticaldirection and a plurality of annular sand storage bins which are arranged in the axial direction of the steel pipe connecting rods; the annular sand storage bins are arranged between every two of theplurality of steel pipe connecting rods, an annular cavity is formed in the annular sand storage bin, the annular side wall of the annular sand storage bin is fixedly connected with the plurality ofsteel pipe connecting rods outside the annular sand storage bin, the top of the annular sand storage bin is open, and an annular hole is formed in the bottom of the annular sand storage bin. Effectivecollection of seabed sand wave soil samples is achieved, the structure is simple, recycling can be achieved for multiple times, and the use cost is reduced.

The present invention provides a side-scan sonar seabed sand wave detection method based on the multi-scale convolution and pooling strategy, seabed sand wave identification is carried out based on deep learning, waveform matching analysis is combined, and the side-scan sonar seabed sand wave detection method is applied to seabed sand wave detection. Deep semantic information of a seabed sand wave image is extracted based on an accumulative learning bilateral branch network, and a pyramid convolution module and strip pooling are introduced according to characteristics of seabed sand waves to carry out feature adaptive optimization and global information enhancement, so that the problems of unbalanced number distribution of seabed sand wave samples, diverse morphological characteristics of sand waves in a complex seabed environment and serious interference of ocean reverberation noise are solved, the seabed sand waves are positioned by taking echo intensity as a research object through waveform matching, and the morphological characteristics such as wavelength, wave height and asymmetric index of the seabed sand waves and the migration trend of the seabed sand waves are analyzed. Therefore, a foundation is laid for further investigation and analysis of seabed sand waves.

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 provides a seabed sand wave in-situ observation device based on internal solitary waves and a working method of the seabed sand wave in-situ observation device. The seabed sand wave in-situ observation device comprises a penetration power system, an observation system and a stabilization system. The penetration power system is composed of a recovery ring, a buoy, a Kevlar cable, a limiting cylinder, a cubic limiting block, a control unit, an annular control cabin, a heavy block and an annular iron block. The observation system is composed of an acoustic probe rod, an acoustic probe rod storage unit, a circular-truncated-cone-shaped limiting block, an one-way limiting device, a horizontal supporting rod, a resistivity probe rod, an electrode ring, a transmitting transducer, afirst penetration conical tip, a receiving transducer, a horizontal supporting rod and a second penetration conical tip. The stabilizing system is composed of a four-foot-frame limiting cylinder, a circular pipe, a stabilizing circular ring, a buffer device and a gravity anchor. By means of the seabed sand wave in-situ observation device, the penetration requirement of the seabed sand wave in-situobservation device is met, the penetration effect is guaranteed, the energy of the internal solitary waves is used as a resource, the design and operation cost of the device is reduced, and the seabed sand waves can be observed in situ in real time.

The invention discloses a seabed sand wave feature identification method, and relates to the technical field of offshore ocean engineering dynamic geologic and geomorphic environments. The method comprises the following steps: acquiring wave crest lines and wave trough lines of sand waves by utilizing actually measured water depth data and adopting an image identification method, grouping the wave crest lines and the wave trough lines of the sand waves through linear fitting and coordinate transformation, and further automatically acquiring characteristic information of the wave length, the wave height and the like of the sand waves in a large area by utilizing information of the wave crest lines and the wave trough lines of the sand waves. According to the method, the wave crest line and the wave trough line of the large-area seabed sand wave can be automatically identified, classified statistics can be automatically carried out on the wave crest line and the wave trough line of the sand wave, a large amount of sand wave characteristic data is further obtained, basic data is provided for further analyzing the relation among the wave length, the wave height, the water depth, the hydrodynamic force and the like of the sand wave, time and cost are saved, and efficiency is improved.

The invention discloses an in-situ observation system for a seabed sand wave migration process, which comprises a set of sand wave sonar system, and is characterized in that the sand wave sonar system is arranged at a selected seabed target position to scan the same seabed area; the sand wave sonar system comprises a sonar assembly, a self-weight anchor, a support and a mooring rope; the sonar assembly is connected with the support, and the support is connected with the self-weight anchor and the cable; and the mooring rope is connected with a floating ball and a buoy from top to bottom. The in-situ observation system for the seabed sand wave migration process is simple and reasonable in structure, convenient to install and use, wide in application range and high in anti-interference capacity. Fixed-point and in-situ seabed sand wave migration observation can be realized, short-time-interval and long-time-period continuous observation can also be realized, and the system is of great significance to research of a seabed sand wave migration rule. The system is worthy of popularization and use.