136 results about "Vertical array" patented technology

The invention discloses a method for detecting radiation characteristics of a to-be-detected target in a shallow sea waveguide environment, which comprises the following steps of: 1, extracting real normal wave modal parameters of a sound source radiation signal in the shallow sea waveguide environment through an orthogonal constraint modal search method according to data received by a vertical array; 2, according to the real normal wave modal parameters, through a normal wave expression in a waveguide environment, performing inversion to obtain a sound field of the whole shallow sea waveguide; and step 3, acquiring sound field information required in the sound field of the shallow sea waveguide, mapping the sound source information into the free space by using the reciprocity theorem, realizing sound field migration from the shallow sea waveguide to the free space, and further acquiring the radiation characteristics of the target to be measured in the free space. The method is used for obtaining the radiation characteristics of the to-be-measured target in the free space according to the data received by the vertical array.

The invention belongs to the technical field of underwater target detection, and discloses an underwater target depth coherent estimation method and system, and the method comprises the steps: receiving a single snapshot signal radiated by a target through a sensor array carried by an underwater carrier, and constructing a potential normal wave orthogonal mode space of a sound field under the condition that a sound velocity profile is known, estimating normal wave parameters (namely normal wave horizontal wave number and vertical modal function) and depth-related modal characteristics (namely modal amplitude) by using the sparsity of the sound field projected in the orthogonal modal space as a constraint, and coherently estimating the depth of the underwater target by using a modal polarity-based search method. According to the method, target depth coherent estimation is realized in a marine environment with unknown seabed sediment by using a single frequency component in a single snapshot noise signal radiated by the target, the accuracy of polarity estimation is improved by using a theoretical depth ambiguity function learned by the KAN network, and the method can be used for underwater target positioning, identification and the like. The method is suitable for carrier platforms such as vertical array subsurface buoys and vertical array buoys.

The invention provides a sparse Bayesian learning-based matched broadband modal phase velocity inversion earth sound parameter method and system, and the method comprises the steps: extracting a local mode through employing a receiving signal of a vertical array, and removing the narrowband limitation of block sparse Bayesian; the broadband modal phase velocity is used for matching inversion of the earth sound parameters, and decoupling of the earth sound parameters is achieved. The method has the advantages that seabed parameters do not need to be known priori, the depth range of the extraction mode is not limited by the aperture of the VLA, and the method can be applied to a non-uniform vertical array; when the earth sound parameters are inversed, the earth sound parameters are not influenced by the terrain on the propagation path, and the earth sound parameters of any terrain can be inversed; known sound source position information is not needed, and the problem of inaccurate inversion result caused by inaccurate sound source position is avoided; and meanwhile, multi-distance sound source signals are used for inversion, so that the inversion of the earth sound parameters is more robust and accurate.

The invention belongs to the technical field of signal and information processing, relates to a modal time delay compensation continuous sound signal target depth estimation method based on a linear array, and is suitable for sonar signal processing. According to the method, on the basis of F-K transformation, through fitting of a sound velocity profile, compensation of modal time delay of each order of each array element, separation of modal of each order in an array receiving signal and a frequency-wavenumber domain, and design of a theoretical curve binary mask filter, modal energy of each order is extracted to be matched with a search depth; and depth estimation of a continuous sound signal target under a general sound velocity profile condition is realized. According to the invention, the depth estimation of a continuous sound signal target is realized, and the problems that a vertical array is difficult to maintain in engineering practice, modal aliasing exists in a continuous signal time-frequency domain by a single hydrophone, and the depth estimation precision error of a depth estimation method under a general sound velocity profile condition is large are solved.

The invention discloses a low-noise ribbon vertical array based on vertical vibration isolation mixed vortex breaking analysis. According to the invention, the specially designed vibration isolation section is arranged to isolate the wind wave flow impact vibration of the hydrophone vertical receiving array in the tension mooring state; the hydrophone vertical receiving array receives underwater acoustic signals under the sea depth condition in a mode of combining a carrier cable vulcanization hydrophone and a multi-array-element oil-filled receiving array section. Meanwhile, the upper vertical mixing section and the lower vertical mixing section are woven through fixed-width woven polyester ribbons with high flexibility, alternating vortex breaking can be effectively formed after the cylinders flow around, and therefore transverse flow-induced vibration of the cylinders is effectively reduced. The low-frequency vibration frequency of the vertical array provided by the invention under the action of typical ocean current is about 9Hz, the vertical vibration isolation capability is below 50Hz and reaches more than 20dB, and the horizontal flow-induced noise suppression capability reaches more than 10dB, so that high-quality acquisition of acoustic data in a large depth range is realized.

The present invention relates to the technical field of aluminum electrolysis material suction cranes, in particular to a multi-functional aluminum electrolysis material suction crane unit, including a trolley mechanism, which includes a trolley bottom plate and a storage tank arranged above the trolley bottom plate. A discharge pipe is fixedly arranged on the bottom surface of the storage tank; a material conveying mechanism arranged below the trolley bottom plate, which includes a plurality of telescopic pipes arranged in a vertical array, steel wire ropes symmetrically arranged on both sides of the telescopic pipes, and a winding roller arranged on one side of the upper end of the telescopic pipe group. Among two adjacent telescopic pipes, the upper end of the telescopic pipe located below is slidably sleeved in the telescopic pipe located above; and a discharging and suction mechanism arranged below the material conveying mechanism, which includes a discharging and suction hopper, a corrugated sleeve and a traction assembly arranged in sequence from bottom to top. This suction crane can effectively adsorb the piled materials, the overall design is reasonable, and it can effectively avoid the raw materials from splashing in the electrolytic cell during feeding, improving the working environment.

The invention discloses a deep ion nitriding process for a gear with high bearing capacity, relates to the related field of gear processing, and aims to solve the problems of different nitriding degrees of different parts of the gear and unstable nitriding quality of the gear due to non-uniform distribution after ammonia gas is introduced in the prior art. When the furnace temperature rises to the nitriding temperature, ammonia gas is introduced into the furnace through an ammonia gas introduction pipe and an ammonia gas discharge pipe, the ammonia gas spirally flows upwards and is discharged along the side wall due to the existence of a first spiral channel and a second spiral channel in the ammonia gas discharge pipe, and the ammonia gas is disturbed through a rotating structure; an ammonia gas discharge pipe is rotationally sealed at the upper end in the ammonia gas introduction pipe, a double-helix part is fixed in the ammonia gas discharge pipe, a gas exhaust hole is formed in the pipe wall of the ammonia gas discharge pipe, a self-rotating fan is rotationally connected to the outside of the ammonia gas discharge pipe and comprises rotating fan blades, and the rotating fan blades horizontally correspond to the gas exhaust hole in position; and horizontal rotating fans are vertically fixed outside the ammonia gas discharge pipe in an array manner.

The utility model relates to the technical field of evaporation crystallizers, in particular to an external heating type reverse circulation evaporation crystallizer which comprises a heating chamber, an evaporation chamber, a confluence chamber and a feeding port, the heating chamber comprises a base, a pump machine, a heating pipe and a sealing cover, and the top of the heating chamber is connected with the evaporation chamber through a connecting pipe. The bottom of the evaporation chamber is connected with the top of the confluence chamber through a pipeline, the feeding port is formed in one end of the confluence chamber, the other end of the confluence chamber is connected with the bottom of the heating chamber through a pipeline, the base is arranged at the bottom of the heating chamber, the pump machine is installed at one end of the base, the heating pipes are vertically arranged in the heating chamber in an array mode, and the sealing cover is installed at the top of the heating chamber. According to the utility model, the pump machine is used for controlling the speed of liquid reverse circulation, so that the device is suitable for raw material liquid with different volatilization speeds, the one-way valve is used for ensuring that raw materials can be added in the crystallization process, leakage is avoided, and crystals in circulation are intercepted and accumulated by using the filter screen and the separation net, so that the recycling is convenient.

The application belongs to the technical field of medical detection, and discloses a medical detection kit, which comprises a hinge-connected box body and a box cover, a plurality of placement jacks are arranged in a vertical array in the box body, a gas bag groove is horizontally arranged on one side of the same row of placement jacks in the box body, the gas bag groove is in communication with the placement jack and has an overlapping part, a limiting gas bag is arranged in the gas bag groove, a plurality of sliding grooves are formed in the box body, the sliding grooves are in communication with the gas bag groove and are perpendicular to each other, a strip-shaped pressing block is vertically and slidably arranged in each sliding groove, and a pressing column is fixedly connected to the inner side of the box cover and corresponds to the position of the strip-shaped pressing block. The placement jack and the limiting gas bag are staggered, when the box cover is closed, the pressing column presses the pressing block, the pressing block extrudes the limiting gas bag, the limiting gas bag is more full, the limiting gas bag is used for flexibly clamping the reagent tube in the placement jack, the clamping stability is better, the reagent tube is not easy to be damaged, and the kit has good shock buffering performance.

The present application relates to numerical control gang drill installation detection technical field, especially point to a kind of numerical control gang drill installation calibration detection device and method thereof, it includes base, gantry support installed on base, detection panel slidingly arranged in one side of gantry support and gang drill mounting seat group installed on base, gang drill mounting seat group includes at least two gang drill mounting seat bodies, two gang drill mounting seat bodies are arranged in parallel with interval, the upper end surface of each gang drill mounting seat body is provided with gang drill installation guide rail along its length direction;The side of gantry support is horizontally provided with transverse guide slide rail, detection panel slidingly arranged in transverse guide slide rail, gang drill installation guide rail is perpendicular to detection panel, and detection panel is detachably equipped with detection assembly.The present application is ingenious in design, shortens the time of numerical control gang drill vertical array whole assembly on numerical control gang drill equipment and calibration adjustment time, improves installation precision and production efficiency, reduces operation difficulty.

The invention relates to the technical field of underwater acoustic engineering, ocean engineering and sonar, in particular to a sound source passive positioning method and system based on a vertical array in a deep sea environment. The method comprises the following steps: receiving a time domain signal radiated by a target sound source through a large-aperture vertical array laid in a deep sea in a bottom-supported manner; performing fast Fourier transform on the time domain signal to obtain a corresponding signal frequency spectrum; obtaining frequency domain wave beam output sound fields of signal frequency spectrums of different array elements of the vertical array at different angles of arrival by using a space power spectrum estimation method; calculating a direct wave arrival angle template value, a sea surface reflected wave arrival angle template value, a direct wave arrival time delay template value and a sea surface reflected wave arrival time delay template value under different hypothetical sound source distances and different hypothetical sound source depths; and combining the four template values with frequency domain wave beam output sound fields at different angles of arrival to obtain sound source passive positioning cost functions at different sound source distances and depths, thereby realizing estimation of the distance and depth of a target sound source.

The present invention discloses a main beam structure of a wind turbine blade, which includes a blade body and a plurality of vibration isolation unit bodies. The inside of the blade body has a cavity for increasing strength and installing other components. A plurality of vibration isolation unit bodies are arranged inside the cavity. The vibration isolation unit bodies extend along the length direction of the blade body, and the plurality of vibration isolation unit bodies are arranged in a transverse and vertical array along the cross-section of the blade body. Adjacent two vibration isolation unit bodies are connected to each other to form an I-shaped main beam, and both ends of the I-shaped main beam are respectively connected to both sides of the cavity; through the I-shaped main beam formed by the plurality of vibration isolation unit bodies and the I-shaped main beam extending along the length direction of the blade body, not only can the supporting effect on the blade body be increased, but also under the action of the vibration isolation unit bodies, a phononic crystal band gap can be formed to play a vibration isolation role, avoiding the transmission of low-frequency vibration at the tip of the blade body to the root of the blade body and causing damage to the blade body.

The invention belongs to the field of soil layer shear wave velocity and damping inversion, and provides a method for joint inversion of a site model based on vertical array seismic records and drilling test data, which comprises the following steps: layering a soil layer, determining initial reference values of shear wave velocity and damping ratio after layering, and determining an observation transfer function. Constructing an inversion objective function and performing iterative search on an optimal solution by using a hill-climbing-random search algorithm, wherein the key point is to construct the inversion objective function and perform iterative search on the optimal solution by using the hill-climbing-random search algorithm; according to the method, the field model is inversed by using the actually measured vertical station seismic record and the drilling test data in a combined manner, the problem of multiplicity of solutions of a traditional inversion method is effectively solved, the shear wave velocity and damping ratio structure obtained through inversion can effectively represent the amplification effect of a local field on seismic oscillation, meanwhile, the drilling test result can be reflected, and the method is suitable for the field simulation. Therefore, the method accords with reality.

The invention particularly relates to a multi-vertical-array layout optimization method based on deep-sea interference sound field spatial distribution, which belongs to the field of underwater acoustic detection and comprises the following steps: performing sliding filtering on an original propagation loss curve received by a bottom-supported vertical array, extracting extreme points to construct an upper envelope line and a lower envelope line, and calculating an average value to obtain average interference sound field intensity; determining the width of interference fringes according to the maximum point spacing of the smooth curve, and building a single-node detection probability curve in combination with the average interference sound field intensity and a detection rate attenuation factor; a detection threshold and a system-level detection probability are obtained through Monte Carlo simulation by using a Chair-Varshey optimal fusion rule, and an optimal layout is determined by taking detection high-quality factor maximization as a standard. The method is used for solving the layout optimization problem of deep-sea wide-range underwater target multi-vertical-array passive detection.

The present invention belongs to the technical field of underwater acoustic vector signal processing, and specifically relates to a method for joint estimation of multiple parameters of broadband moving targets based on vector arrays. The present invention performs sub-band division on the broadband sound pressure and velocity signals of noisy targets received by the vector vertical array to construct an acoustic field interference structure containing target parameter information; reflects the interference structure to the time and space domain through vector beamforming, and extracts the interference structure and vertical arrival angle; combines the interference structure and vertical arrival angle to estimate the target depth based on the zero-point periodicity characteristics of the interference structure; cross-correlates the sound pressure and velocity signals received by the vector hydrophone to construct sound pressure and velocity cross-correlation velocity interference fringes, and solves the velocity parameters based on the characteristics of the fringes containing physical quantities. The present invention uses a vector vertical array to obtain the target excitation sound field interference structure and the target vertical arrival angle, and is suitable for fields such as long-range early warning and target detection of underwater targets.

The utility model provides a telegraph pole convenient to climb, and belongs to the technical field of telegraph poles, the telegraph pole convenient to climb comprises a pole body, a plurality of pedal grooves and concave parts are arranged on the pole body in a vertical array mode, the concave parts can be used for being held by hands to apply force, and the upper surface of each concave part and the lowest horizontal plane of the pedal groove are located on the same horizontal line; the climbing ladder is convenient for people to climb, and is simple in structure and convenient to manufacture and use.

This utility model provides an anti-static interference LED display driver module, relating to the field of LED display technology. It includes a base frame with a mounting bracket on one side. The mounting bracket has two through holes arranged in a horizontal and vertical array on its surface. Two limiting holes are located in the middle of each of the two through holes, and limiting posts are located at the top of each of the four limiting holes. A display driver board is located on one side of the base frame. During installation, the base frame is pressed against the mounting bracket, causing the fixing bracket and limiting posts to pass through the through holes and limiting holes respectively. During this process, the mounting bracket pushes the locking block back into the fixing bracket. When the fixing bracket has completely passed through the through holes, the locking block loses the pressure of the mounting bracket and pops out again under the action of a return spring, locking the mounting bracket. Simultaneously, the four limiting posts restrain the base frame, thus completing the installation of the LED display driver module. The entire installation process only requires pressing, eliminating the need for mounting bolts and solving the drawback of having to align and tighten bolts one by one during installation.

This invention relates to the fields of underwater acoustic engineering, marine engineering, and sonar technology, and particularly to a passive sound source localization method and system based on a vertical array in a deep-sea environment. The method includes: receiving the time-domain signal radiated by a target sound source using a large-aperture vertical array deployed on the seabed in the deep sea; performing a fast Fourier transform on the time-domain signal to obtain the corresponding signal spectrum; using a spatial power spectrum estimation method to obtain the frequency-domain beam output sound field of the signal spectrum of different array elements at different angles of arrival; calculating template values ​​for the direct wave angle of arrival, the sea surface reflected wave angle of arrival, the direct wave arrival time delay, and the sea surface reflected wave arrival time delay under different assumed sound source distances and depths; combining the four template values ​​with the frequency-domain beam output sound field at different angles of arrival to obtain a passive sound source localization cost function for different sound source distances and depths, thereby achieving the estimation of the target sound source distance and depth.

The invention relates to the technical field of electrochemical biosensors, and discloses an environmental microorganism nucleic acid electrochemical biosensing quantitative detection method based on a nanochannel, which comprises the following steps: filtering at normal pressure to obtain a MoS2-nanochannel, designing a target nucleic acid specific recognition probe, and preparing a biological recognition element and a carbon nanotube modified electrode. And constructing the electrochemical biosensor. In the electrochemical detection process, the distinguishable single-chain and double-chain nucleic acid characteristic of MoS2 is combined with a specific recognition probe, so that the anti-interference capability and selectivity of the detection method are improved; the sensitivity of the detection method is improved by utilizing the diffusion process of signal molecules in the nano-channel porous vertical array and a dual signal amplification strategy of the carbon nanotube modified electrode; the detection method provided by the invention overcomes the defects of expensive instrument and equipment, tedious operation process and high sample purity requirement of a traditional environmental microorganism nucleic acid quantitative detection method, and realizes the effect of sensitively detecting trace nucleic acid in a field complex environmental sample.

The invention discloses a semi-self-contained hydrophone synchronous array for transmitting and receiving signals based on a bearing leakage cable. Control signals such as clock signals and the like are transmitted by utilizing the principle that the specially designed force-bearing leakage cable radiates electromagnetic waves; at a semi-self-contained hydrophone end, signals are received by adopting a variable medium receiving antenna mode, so that deep sea vertical array sound signals in a large depth range are synchronously received. In addition to issuing control signals such as clock signals, hydrophone data can be uploaded to a master control electronic bin for storage through a bearing leakage cable, and the reliability of data acquisition is improved. The sound signal synchronous acquisition precision realized by the semi-self-contained hydrophone synchronous array can reach 10 mu S, and the coverage of 2000 m in deep sea can be formed at most. The semi-self-contained hydrophone provided by the invention can be used for carrying out half-wavelength array arrangement or random nested array arrangement according to any frequency.

The invention discloses a GaN chip packaging structure and method based on vertical interconnection and gradient thermal matching. The GaN chip packaging structure comprises a substrate, a wave absorbing layer is installed in the substrate in an embedded mode, a copper wire layer is installed on the substrate, and a thermal transition layer is sprayed on the copper wire layer; a GaN chip is mounted on the thermal transition layer, carbon nanotubes are vertically arrayed on a gate region of the GaN chip, and the carbon nanotubes are connected with an output end of a driving chip. The high-frequency performance breakthrough is that the parasitic inductance is reduced by more than 95%, the thermal reliability is improved, the CTE mismatch problem is thoroughly solved, the high-frequency noise is suppressed, and the wide-band shielding effectiveness is improved by 10 times.

The present invention relates to a vertical array rocking plate wave energy power generation device, which aims to solve the technical problems of the prior art, such as the difficulty in achieving high-power power generation due to the short wave front, the unsuitability for mobile operations at sea, and the complex equipment, high cost, bulky size and poor mobility. The wave energy power generation device includes a first buoy, a second buoy, a first support column, a first power output interface, a second power output interface, multiple wave energy conversion components, a support assembly disposed on the first support column, and a first battery and a second battery disposed in the first buoy and the second buoy, respectively. The first support column has two ends connected to the first buoy and the second buoy, respectively, and is located between the first buoy and the second buoy. The wave energy conversion components are disposed on the support assembly in an A×B vertical array and are located underwater. The output ends of the wave energy conversion components are electrically connected to the first battery and the second battery, respectively, wherein A ≥ 2, B ≥ 1, and A and B are both integers.

The present invention belongs to the technical field of underwater acoustic signal processing, and specifically relates to a method for estimating the depth of underwater targets based on the broadband interference fringe structure of deep-sea vector sound fields. The present invention receives the sound field information composed of the direct wave and the sea surface reflection wave of the target near the sea surface through a reliable sound path through a vector vertical array deployed at a critical depth, and intuitively reflects the broadband interference fringe structure and the target vertical arrival angle spatial information contained in the received noisy broadband sound pressure signal and broadband vibration velocity signal through a vector array signal processing method, and uses the relationship between the broadband interference fringe structure and frequency of the time-frequency distribution and the target vertical arrival angle to estimate the target depth. The present invention uses a vector vertical array to obtain the target excitation sound field information, and uses vector beamforming technology to map the characteristics of the sound field to the spatial domain, without the need for precise measurement and acquisition of ocean environmental parameters.

The present invention aims to enable the installation of vibration damping devices on columns while minimizing cross-sectional loss of the columns. [Solution] A vibration damping device (10) for damping vibrations in a building (1) having a pair of columns (2) standing side by side comprises: a pair of holders (20) that each hold the pair of columns (2); a pair of brackets (40) that extend from each of the pair of holders (20) toward the center between the pair of columns (2); a pendulum (60) supported by the pair of brackets (40) that swings up and down about the center between the pair of columns (2) in accordance with the vibration of the pair of columns (2) and the pair of brackets (40) during an earthquake; and a pair of dampers (80) connected to the left and right ends of the pendulum (60) and fixed to the pair of brackets (40).

The utility model relates to door board transportation storage technical field, concretely relates to a door board transportation storage device. Including frame, the side vertical array fixed setting of frame has a plurality of horizontal arrangement's locating rod. The utility model discloses, respectively inserting the longitudinal beam both ends in corresponding insertion gap, ensure that the baffle and the crossbeam far from the side contact of locating rod, then rotate threaded rod drive slider drive movable frame to move down, make movable support strip under the action of gravity rotate downward around the hinge shaft, until its lower side wall and corresponding locating rod contact, with the upper side wall of fixed support strip jointly constitute an inclined placement plane, movable frame lower end moves to the longitudinal beam below simultaneously, with the baffle cooperation fixes the longitudinal beam on the frame, realized as the quick installation of prefabricated integrated structure's support assembly, through the installation support assembly, can reduce the interval of all placement planes on the adjacent movable support strip simultaneously, make the device suitable for a variety of size's door board.

The invention provides a deep sea seabed reflection area weak signal correlation enhancement method, which comprises the following steps of: firstly, generating shadow area array data according to input environmental parameters such as a processing frequency band, seawater depth, array depth and a sound velocity profile, and secondly, calculating an arrival angle of a sea surface direction incoming wave sound signal and an arrival angle of a seabed direction incoming wave sound signal; the method comprises the following steps: constructing incoming wave guide vectors facing the sea surface direction and the seabed direction at the same distance (indicating that the positions of a sound source and a vertical array are unchanged), then extracting incoming wave single-beam time domain waveforms in the sea surface direction and the seabed direction at the same distance, and finally, performing cross-correlation on the incoming wave single-beam time domain waveforms in the sea surface direction and the seabed direction, and taking a maximum value for output. According to the method, the problem of weak signal enhancement in the deep-sea shadow area is solved, compared with conventional beam forming, the weak signal detection capability is obviously improved, and the method has high engineering application value.

The present invention discloses a novel biomass-based solar water evaporator and its preparation method and application, which relates to the field of energy conversion technology. The solar water evaporator comprises a water transmission layer, a heat insulation layer and a photothermal conversion layer, wherein the water transmission layer is a porous network skeleton in the shape of a super-hydrophilic vertical array pipe, the heat insulation layer is a super-hydrophilic and high-thermal-resistance silica aerogel coating forming a stable interface on the water transmission layer, and the photothermal conversion material has good photothermal conversion ability and is coated on the heat insulation layer to form a photothermal interface. The raw materials of the present invention are widely available and low in cost. The preparation method is simple, convenient and easy to implement, and can be assembled into a water evaporator with a fast water evaporation rate and high energy efficiency, so it is conducive to large-scale production. The present invention can be used for interfacial solar evaporation, has the advantages of efficient production of clean water, long-term stability, good anti-fouling and salt resistance, and has broad application prospects.

The application discloses a kind of radiation characteristics detection methods of target to be measured under shallow sea waveguide environment, comprising the following steps: step 1: according to the data received by vertical array, by orthogonal constraint mode search method, extract the real normal mode parameters of sound source radiation signal in shallow sea waveguide environment;Step 2: according to the real normal mode parameters, by normal mode expression in waveguide environment, the sound field of entire shallow sea waveguide is obtained by inversion;Step 3: obtain the sound field information required in the sound field of shallow sea waveguide, utilize reciprocity theorem to map sound source information to free space, realize the sound field migration from shallow sea waveguide to free space, and further obtain the radiation characteristics of target to be measured in free space.The method of the application is used to obtain the radiation characteristics of target to be measured in free space according to the data received by vertical array.

The invention relates to a shallow sea equivalent earth sound model inversion method based on sparse Bayesian learning dispersion curve estimation, and the method comprises the following steps: 1, carrying out the time-frequency transformation of broadband sound source data received by a shallow sea vertical array, and obtaining multi-frequency-point and multi-snapshot frequency domain vertical array data; step 2, constructing a horizontal wavenumber hypothesis interval and a modulus depth function hypothesis space corresponding to each frequency point according to a water layer sound velocity profile and environmental prior information; and step 3, based on a normal mode sound propagation theory, frequency domain vertical array data of each frequency point is modeled as a weighted sum of each mode depth function in the mode depth function hypothesis space, and a weight vector is a horizontal wave number spectrum. According to the method, the sound field intrinsic characteristic, namely the dispersion curve, irrelevant to the sound source is directly extracted from the vertical array data, and an equivalent earth sound model concept is utilized, so that an earth sound parameter inversion scheme which is more stable, is more tolerant to model mismatch and can effectively avoid attenuation coefficient coupling influence is realized.

The present invention relates to a method for estimating the radiated sound pressure of a shallow water complex target based on a near-field vertical array, comprising the following steps: S1, using a vertical array equal to the water depth to measure the near-field sound pressure of a sound wave emission point, and measuring a virtual cylindrical measurement surface that can completely enclose the sound wave emission point at different orientations of the sound wave emission point; S2, substituting the measurement data of each array element point of the vertical array into the general solution form of the radiated sound pressure in the virtual cylindrical coordinate system and constructing a matrix equation; S3, then solving the coefficient matrix of the radiated sound pressure, substituting the obtained coefficient matrix into the modal expansion form solution of the radiated sound pressure in the virtual cylindrical coordinate system, and calculating the radiated sound pressure of any point outside the virtual cylindrical measurement surface in the shallow water ocean waveguide. The beneficial effect is that in the ocean waveguide, the far-field sound pressure is estimated using the near-field vertical measurement data array.