56 results about "Vertical array" patented technology

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 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.

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.

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 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 utility model discloses a wooden column foot fixed connection structure which comprises a wooden column foot body and a base arranged at the lowermost end of the wooden column foot body, a ground pile is arranged in the inner position of the upper side of the base, a bottom plate is arranged on the upper side of the ground pile, a plurality of inserting plates are vertically arranged on the lower side of the bottom plate in an array mode, and the inserting plates are connected with the base. An upper plate is arranged at the outer position of the middle of the upper side of the bottom plate, a fixing column is arranged at the middle position of the upper side of the upper plate, sector plates are arranged at the four corners of the fixing column correspondingly, a firm bottom foundation is formed by a connecting structure and ground piles through combination of concrete pouring and bottom plate inserting plates, and the stability of the whole structure is improved; the wooden column foot main body is fixed in the connecting structure through the inserting groove in a sleeving and embedding mode, shaking of the wooden column foot main body is effectively relieved, the anti-seismic performance of the structure is improved, the fixing bolts penetrate through the protection plate and are inserted into the wooden column foot main body, the stability of the connecting structure is ensured, and the wooden column foot main body is prevented from being separated from the connecting structure.

The utility model discloses a traffic information prompting door frame, which relates to the technical field of traffic information boards and comprises a side frame and a display board, symmetrical sliding rails are arranged on one side of the side frame facing the display board, a row of adjusting holes in vertical array are arranged on the sliding rails, and the display board positioned on the side frame is slidably connected with the sliding rails. A display screen is arranged in front of the display board, a connecting column is fixedly arranged on the side edge of the rear portion of the display board through a fixing base, an inserting sleeve is fixedly arranged on the other side of the display board, extrusion plates are fixedly arranged on the portions, located on the upper side and the lower side of the inserting sleeve, of the display board, and spring columns are arranged on the extrusion plates in a sleeving mode. Limiting blocks are fixedly arranged on the sides, facing the connecting columns, of the spring columns, and limiting grooves are formed in the positions, corresponding to the limiting blocks, of the spring columns. The information door frame is simple in structure, stable in structure, high in practicability and suitable for popularization, the height and the width of the information door frame can be adjusted, and the single display boards can be conveniently mounted and dismounted.

The utility model relates to a lifting air cylinder for washing tank, including lifting air cylinder body, the left and right sides of lifting air cylinder body all are provided with first U type mounting plate, the inside of two first U type mounting plates all are provided with first locating slot, first locating slot is three in vertical array, the side of two first U type mounting plates all is fixedly connected with first fixed component, first fixed component is three in vertical array, the side of two first U type mounting plates all is provided with second U type mounting plate, the inside of second U type mounting plate is provided with second locating slot, second locating slot is three in vertical array, the side of second U type mounting plate is fixedly connected with second fixed component, second fixed component is three in vertical array, the utility model discloses a lifting air cylinder solves the pollution product caused by the wear and tear of rope and other components of the type hoisting operation mode, and personnel operation is convenient and responds fast, and the action is agile, and maintenance is simple.

A method for fabricating a 3D vertical array of memory cells is disclosed. The method includes forming a stack of layers of dielectric material on a substrate, including first and second layers of dielectric material alternating with each other; forming a hole through the stack of layers of dielectric material, the hole exposing the substrate; selectively removing the second material layers via the hole to form cavities between adjacent first layers of dielectric material; filling the cavities with a conductive material via the hole to form corresponding layers of conductive material; forming a first memory cell access line from the layers of conductive material; performing conformal deposition of a chalcogenide material via the hole; forming a memory cell storage element from the deposited chalcogenide material; filling the hole with a conductive material to form a corresponding second memory cell access line.

The invention relates to a PINN noise field continuation-based seabed reflection loss high-precision estimation method, which comprises the following steps of: 1, giving an N-element vertical receiving array, the depth of each array element and noise field data of a frequency point received by the N-element vertical receiving array; 2, dividing M distance grids according to the frequency and the computational domain for processing the noise field data, and step 3, designing a physical information neural network (PINN) for noise field data continuation, and training the network by taking the collected noise field data as input to obtain a trained NoisePINN network. According to the method, the limitation of vertical receiving array space sampling is effectively broken through, the vertical array aperture is equivalently expanded, and a seabed reflection loss result with higher precision and resolution can be obtained.

The utility model relates to the technical field of radiators, in particular to a novel radiator with a needle-column-shaped fin high-density arrangement structure, which comprises a substrate, the substrate is provided with at least one heat source contact surface, mounting holes are arranged at corners of the heat source contact surface so as to facilitate fixation, and a plurality of needle-column-shaped fins are arranged on the non-contact surface side of the substrate in a high-density vertical array mode. The cross section of the substrate is polygonal or circular, turbulent flow grooves (preferably V-shaped grooves or trapezoidal grooves) are formed in the top of the substrate so as to increase air turbulence and improve the heat dissipation effect, the projection area of the needle-column-shaped fins accounts for 70%-95% of the total area of the non-contact face of the substrate, the space is utilized to the maximum extent, the needle-column-shaped fins are made of copper alloy, aluminum alloy or metal matrix composite materials, and therefore the heat dissipation efficiency is improved. And the surface of the needle-column-shaped fin is covered with the nano oxide layer, so that the heat-conducting property and the corrosion resistance are enhanced, the needle-column-shaped fin can be arranged in a staggered array or hexagonal close packing manner, and the airflow path is optimized.

This invention provides a tolerance-based distance estimation method and system for dual-channel acoustic imaging in Arctic ice regions based on normal mode-constrained modes. The method includes: using a normal mode model to simulate and predict the frequency domain sound pressure, phase velocity, group velocity, and mode covariance matrix of the experimental sea area in the Arctic ice region; using Fast Fourier Transform (FFT) to transform the time-domain signal received by the vertical array in the ice region into frequency-domain data; obtaining the sound velocity and depth corresponding to the upper boundary, channel axis, and lower boundary of the Beaufort waveguide based on the dual-channel sound velocity profile of the experimental sea area; obtaining the order index of the Beaufort waveguide modes based on the intersection of the phase velocity dispersion curve with the sound velocity at the upper boundary and channel axis of the Beaufort waveguide; performing mode separation using a matched filtering mode filtering method to extract the modes confined in the Beaufort waveguide; and constructing a tolerance-based distance estimation operator for ice and seabed based on the extracted modes in the Beaufort waveguide to achieve tolerance-based estimation of underwater target distances.

The utility model relates to a hanging tool, in particular to a multi-layer back-to-back type anodizing hanging tool. Comprising a hanging plate, a plurality of rotating shafts are vertically and rotatably arranged on one side of the hanging plate in an array mode, a plurality of hooks are fixedly connected to the circumferential side walls of the rotating shafts in a transverse array mode, and a rotating mechanism is arranged at the position, close to the edge, of one side of each rotating shaft of the hanging plate and used for driving the rotating shafts to rotate synchronously. Two foot plates are hinged to the positions, close to the bottom, of one side of the hanging plate in a bilateral symmetry mode. According to the utility model, when a worker twists the worm to enable the plurality of half worm gears to drive the corresponding rotating shafts to rotate, the lowest rotating shaft drives the connecting rod to rotate in the same direction through the transmission mechanism, so that the rotating shafts drive the hooking rod of the hook to rotate upwards to be parallel to the hanging plate, and the foot plate also rotates to be parallel to the hanging plate; therefore, the occupied space of the hanging tool is reduced, a worker can conveniently stack and store a plurality of hanging tools, and the space utilization rate of the storage position of the hanging tool is improved.

The invention relates to the technical field of charging piles, and discloses an energy-saving electric vehicle direct current charging pile which comprises a fixed assembly and a movable assembly, the fixed assembly is fixedly arranged on the right side of the interior of a storage shell, the movable assembly is movably arranged on the left side of the interior of the storage shell, and the fixed assembly and the movable assembly are both arranged in a vertical array mode. And a movable assembly is arranged between the two fixed assemblies. When the charging cable needs to be stored, a user enables a part of the charging cable to penetrate through the storage groove and be clamped in the storage cavity, the pressure sensor receives a signal that the charging cable is clamped and then transmits the signal to the control system, the control system controls the movable assembly to be started, the multiple movable shafts are pushed by the power piece to synchronously and horizontally move, and the charging cable is stored in the storage cavity. According to the charging cable folding device, the charging cable can be folded vertically and can be effectively stored in the storage cavity of the storage shell in cooperation with the multiple fixing assemblies, so that the charging cable is fully protected, abrasion of the charging cable is reduced, and meanwhile the use safety is improved.

The invention discloses a goodness vector calculation method for measuring modal filtering performance of a vertical linear array. The goodness vector calculation method comprises the following steps: (1) initializing marine environment parameters, line spectrum signal parameters emitted by a sound source and vertical receiving array parameters; (2) calculating each order normal wave mode function excited by a line spectrum signal emitted by a sound source and a receiving sound pressure value at each hydrophone depth of a vertical array by using a Kraken model, and establishing an array receiving sound pressure vector; (3) constructing a sampling mode function matrix, multiplying a pseudo-inverse matrix of the sampling mode function matrix by the sampling mode function matrix to obtain a mode filtering matrix, and calculating a relative attenuation coefficient of each order mode; (4) calculating to obtain a contribution degree matrix by using the modal filtering matrix and the relative attenuation coefficient of each order of modal, and taking out main diagonal element values of the contribution degree matrix to form a goodness vector; according to the method, the modal filtering performance can be quantitatively represented, and a quantitative analysis means is provided for measuring the modal filtering performance under the vertical linear array.

The application discloses a kind of underwater target autonomous resolution and depth estimation method based on deep sea vertical array, the method includes: step 1) according to vertical hydrophone array correlation parameter, utilize sound field calculation software simulation receiving sound field under different depths;Step 2) Fourier transform and beam forming processing are carried out to the time-domain sound field actually collected by vertical hydrophone array, and it is specified to multiple sub-band range, then the pre-calculated target navigation track is matched with the measured sound field transformed into beam-time domain, and the frequency of line spectrum is estimated using one-dimensional signal peak estimation algorithm, to obtain target track sound field;Step 3) the simulated receiving sound field and target track sound field under different depths are correlated, and the autonomous resolution and depth estimation of surface underwater target are realized.

This invention relates to a method for measuring the acoustic absorption coefficient of the shallow seabed, comprising the following steps: measuring the seawater depth of the experimental sea area using an echo sounder; measuring the average sound energy density generated by rainfall using a hydrophone vertical array; measuring the rainfall intensity using a rain gauge; measuring the sound power radiated underwater by rainfall per unit area of ​​the sea surface; and calculating the acoustic absorption coefficient of the shallow seabed. The measurement method of this invention has a clear principle, and by measuring the underwater noise generated by rainfall, it can cleverly measure the acoustic absorption coefficient of the shallow seabed across the entire frequency band.

The invention discloses a line spectrum target detection method based on a vertical array and space-time gain enhancement, and belongs to the field of underwater acoustic detection and array signal processing. According to the invention, the problems of high complexity and poor robustness of the existing array-based processing method are solved. The method comprises the following steps: segmenting a received signal of a vertical array, carrying out DFT (Discrete Fourier Transform) on the segmented signal to obtain a three-dimensional Lofar matrix of the received signal of the vertical array, and respectively calculating a two-dimensional signal matrix and a two-dimensional steering vector corresponding to each group of target motion model parameters in a preset parameter search space; and then motion parameters of the target are obtained based on coherent integration search, passive positioning of the line spectrum target is realized, high space-time gain detection of the line spectrum target is realized through space-time coherent integration, and the detection performance of a weak line spectrum target is improved. The method can be applied to line spectrum target detection.

The invention relates to a deep sea direct sound area target depth estimation method based on Tucker decomposition noise reduction and a storage medium, and the method comprises the following steps: 1, calculating the phase change in a specified frequency band from array data collected by a vertical array; and step 2, performing conventional beam forming on the array data, constructing noisy beam tensors in three dimensions of frequency-glancing angle-distance, and performing Tucker decomposition and reconstruction on the noisy beam tensors to obtain de-noised beam tensors. Most noise signals in the target signals can be effectively removed, and the method has great advantages when the problem of large extraction error of the sound field broadband interference structure under the condition of low signal-to-noise ratio is solved.

The application discloses a kind of deep sea direct sound zone near seabed very low frequency line spectrum target ranging method, belong to deep sea signal processing and underwater target positioning field.The method steps include: based on target sea area environmental parameter establishment sound propagation model, through near seabed vertical direct receiving array obtains depth-intensity interference fringe;Copy sound field calculation model is constructed using virtual source method, and three main propagation paths are retained to generate copy interference fringe;To measured and copy stripe are standardized, with cross-correlation coefficient as matching index, realize target distance estimation by peak search.The application realizes the estimation of target sound source distance by matching the depth-intensity interference fringe formed by the near seabed vertical array at a single frequency, with the depth-intensity one-dimensional interference fringe as the matching object, the array aperture is small, the feature dimension is lower, the calculation amount of copy field generated by virtual source method is smaller, and due to the equivalent assumption of virtual source method, the method is not sensitive to environmental mismatch, and has good robustness.

The invention provides a multi-mode monitoring all-in-one machine, and relates to the technical field of intelligent traffic. The all-in-one machine comprises a machine body; an active protective housing; the vertical array optical subsystem is embedded into the active protective shell and comprises a high-definition camera module and an infrared thermal imaging module; the self-adaptive geometric calibration mechanism is arranged on a base of the vertical array optical subsystem and is used for calibrating the angle change of the vertical array optical subsystem; the self-sensing attitude compensation base is fixedly arranged at the lower end of the active protective shell and is used for adjusting the attitude change of the vertical array optical subsystem; the AI video processing terminal is in communication connection with the vertical array optical subsystem and is used for acquiring environmental parameters; dynamically adjusting a visible light weight and an infrared weight based on the environmental parameters; obtaining a visible light video and an infrared video after adjustment, and extracting visible light features and infrared features; and carrying out interaction and fusion on the visible light features and the infrared features through a cross-modal attention mechanism to generate an enhanced feature map. According to the invention, the adaptability and reliability of monitoring can be improved.

This invention discloses the fabrication and device of a vertical array of boron nitride nanotubes. The fabrication method includes: uniformly mixing a catalyst and a boron source to prepare a precursor powder; weighing the precursor powder and placing it in a reaction boat; placing a substrate above the reaction boat and heating it, introducing an inert gas during the heating process; maintaining the temperature after reaching the growth temperature, turning off the inert gas and introducing a nitrogen source to grow the vertical array of boron nitride nanotubes; after growth, turning off the nitrogen source, cooling the furnace tube to room temperature under inert gas protection, and removing the sample. This invention features a simple process and convenient operation, and ensures sufficient contact between the boron and nitrogen sources during the fabrication process, improving product quality and achieving the fabrication of a high-density, highly oriented vertical array of boron nitride nanotubes.

The embodiment of the invention provides an array gain calculation method and device for a deep-sea near-sea-surface vertical array buoy, and relates to the technical field of array signal processing. The method is applied to a vertical array buoy and comprises the following steps: acquiring related parameters of the vertical array buoy and noise source parameters; calculating a first contribution value of near-field noise to noise cross-spectrum density and a second contribution value of far-field noise to noise cross-spectrum density based on the vertical array buoy related parameters and the noise source parameters; determining a noise cross-spectral density matrix based on the first contribution value and the second contribution value; determining the noise directivity gain of the vertical array buoy based on the beam scanning pitch angle and the noise source parameter; determining the signal directivity gain of the vertical array buoy based on the beam scanning pitch angle, the received signal and the signal cross-spectral density matrix; based on the noise directivity gain and the signal directivity gain, the array directivity gain of the vertical array buoy is determined, and then the array gain of the vertical array buoy is determined. According to the invention, the accuracy of array gain calculation can be improved.

The utility model provides a strip mine stacker-reclaimer and adhesive tape machine cooperative communication device, which relates to the technical field of communication and comprises a communication device body, a fixing frame is arranged on one side of the communication device body, a guide groove is arranged on the surface of the fixing frame, and through holes are vertically arranged on one side of the guide groove in an array mode. Two mounting frames are arranged on the surface of the side, away from the guide groove, of the fixing frame, a movable groove is formed in the fixing frame, when the clamping teeth retract into the movable groove, a network cable is mounted on a network cable interface in the surface of the communication device body through a through hole of the fixing frame, and after mounting is completed, a shifting block is loosened; the reset spring in the sleeve pushes the guide rod of the moving frame through elastic force, so that the moving frame moves rightwards, the clamping teeth of the moving frame are installed in the through hole again, the network cable is clamped, and the network cable is prevented from falling off due to external force. The problem that the network cable is easily influenced by various external force factors when being installed on the network cable connecting port on the surface of the communication device is solved.

The invention provides a vertical array target distance estimation system and method based on a twin neural network, and belongs to the technical field of estimation methods, and the system comprises a data collection unit which comprises an L-element hydrophone array; the preprocessing unit is in communication connection with the data acquisition unit; the sample pair construction unit is in communication connection with the preprocessing unit; the feature extraction unit is in communication connection with the sample pair construction unit, the feature extraction unit comprises a twin convolutional neural network, and the twin convolutional neural network has two branches sharing weights; the loss calculation unit is in communication connection with the feature extraction unit; the model training unit is in communication connection with the feature extraction unit and the loss calculation unit; and the distance prediction unit is in communication connection with the model training unit, and solves the problems of low precision and poor generalization caused by environment mismatch and data insufficiency of a traditional vertical array passive distance estimation method.

The invention discloses a laser radar target simulator and a use method thereof, the simulator comprises a camera obscura and a control unit, and a radar placement unit and a transceiver unit are arranged in the camera obscura. A light-absorbing material is attached to the inner wall of the dark box for eliminating interference of reflected light and ambient light; the radar placement unit is used for fixing a to-be-tested laser radar; the transceiving unit is located in a distance blind area of a laser radar detection view field and comprises a photoelectric detector and a laser transmitter which are respectively used for receiving laser signals, converting the laser signals into electric signals and transmitting laser simulation echoes with adjustable intensity. And the control unit accurately controls the delay time and the output power of the laser transmitter according to the simulation parameters, so that the laser simulation echo simulates reflected light waves of target objects with different distances and reflectivity. In addition, the transmit-receive units can be arranged in a vertical array to enlarge the field coverage. The invention further discloses a using method of the simulator. According to the technical scheme, the test efficiency, accuracy and repeatability of the laser radar are remarkably improved.

The application discloses a kind of passive ranging methods based on deep sea angle of arrival structure, belong to underwater acoustic positioning and identification technical field.A kind of passive ranging methods based on deep sea angle of arrival structure, method includes: first step: N vertical linear array is placed in deep sea and respectively collects vertical array data and environmental parameter;Second step: two kinds of parameters collected are respectively carried out vertical dimension conventional beam forming and the angle of arrival θ (R) of bottom reflection acoustic ray is calculated using sound field calculation software;Third step: by calculating, respectively, the angle of arrival estimation value θ0 of bottom reflection is obtained, and it is combined with measured hydrological parameter and bottom parameter using fitting estimation parameter, first, the angle of arrival of acoustic ray corresponding to different distances is predicted using sound field calculation software, then the parameters a and b of mapping formula are estimated, and finally, passive is realized by vertical array estimation acoustic ray angle of arrival.