168 results about "Hydrophone array" patented technology

The invention provides a civil air defense engineering concealed conduit leakage positioning method based on acoustic characteristics, and belongs to the technical field of civil air defense engineering. An acoustic signal acquisition network is constructed by deploying a high-sensitivity hydrophone array, and signals are preprocessed by using a time division multiple access technology and a pulse compression technology; and carrying out time-frequency analysis by applying wavelet transform to extract acoustic features. A time reversal mirror technology is introduced to identify direct propagation and multipath reflection signals, a fluid acoustic coupling propagation equation is constructed to analyze a leakage sound source mechanism, and pipe network topological information and a sound wave speed correction function are combined to compensate a measurement error. Wherein the deep learning pipe network acoustic propagation multi-modal model is fused with a pipeline structure encoder, an acoustic feature extractor and a position prediction decoder, and high-precision leakage positioning and degree evaluation in a complex environment are realized through a three-stage pre-training strategy; the technical problem that it is difficult to accurately locate the position of a leakage point in the complex pipe network environment of civil air defense engineering is solved.

The invention provides an underwater sonar target detection system and method. The underwater sonar target detection system comprises an optical fiber hydrophone array module which comprises a plurality of optical fiber hydrophone units, each unit comprises an optical fiber Bragg grating sensor and a sound pressure signal demodulation device, and the optical fiber hydrophone array module is used for collecting underwater sound wave signals in real time and converting the underwater sound wave signals into first electric signals; the sonar transmitting-receiving array module comprises a broadband sonar transmitter, a multi-beam receiver and a signal preprocessing circuit, and is used for actively transmitting a frequency modulation continuous wave signal, receiving a target reflection echo and generating a second electric signal; and the multi-mode signal fusion processing module comprises a high-speed data acquisition card, a self-adaptive noise suppression unit and a time-frequency analysis unit. The underwater sonar target detection system and method provided by the invention have the advantages of relatively high reliability, relatively high detection performance, relatively accurate cross-modal signal fusion and capability of performing intelligent target identification and tracking.

The invention discloses a device for acoustically monitoring suspended sediment concentration and section particle size mean value of an ocean and a river, and relates to the technical field of ocean and river water environment monitoring. The four groups of piezoelectric ceramic transducers at the transmitting end are used for transmitting sound pulses with multiple frequencies into the same water body, and the broadband hydrophone array at the receiving end is used for synchronously receiving acoustic backward scattering signals which are scattered back. Wavelet threshold denoising and frequency domain filtering are combined, acoustic back scattering signals are preprocessed, turbulence and biological noise are eliminated, nonlinear errors caused by the particle size-concentration coupling effect are solved through an inversion algorithm fusing attenuation and scattering signals and in combination with a dynamic hierarchical data processing technology, and the accuracy of the acoustic back scattering signals is improved. The device realizes high-precision real-time measurement of suspended sediment parameters in ocean and river environments, has the capability of adaptive correction of environmental parameters, and is suitable for scientific research and engineering monitoring scenes.

The utility model belongs to a light sensing detection system, and discloses an optical fiber hydrophone protection structure and an optical fiber hydrophone array, the optical fiber hydrophone protection structure comprises a protection cover assembly and two buckling rings, the protection cover assembly comprises a first cover body and a second cover body, the first cover body and the second cover body are arranged corresponding to the optical fiber hydrophone along the peripheral side of the optical fiber hydrophone sheath in an enclosing and splicing manner, two ends of the first cover body arranged along the enclosing and splicing direction are provided with first splicing plate parts in an extending manner, and two ends of the second cover body arranged along the enclosing and splicing direction are provided with first splicing openings; the first splicing plate part is embedded in the first splicing opening which is formed by enclosing and splicing on the same side, the two buckling rings are arranged at the two ends of the protective cover assembly respectively, the first end of each buckling ring is buckled on the protective cover assembly, and the second end of each buckling ring is buckled on the optical fiber hydrophone sheath. The purposes of improving the external impact load bearing capacity of the optical fiber hydrophone and preventing the optical fiber hydrophone from being damaged are achieved.

A sonar platform self-noise interference removal method and system, a device, and a storage medium. The method comprises: mounting a hydrophone array on one side of a sonar platform; dividing a sonar platform space into a grid, and constructing matrix A1 using an acoustic transfer function between each point on the grid and each array element; dividing a target radiation sound source space into a grid, and constructing matrix A2 using an acoustic transfer function between each point on the grid and each array element; concatenating matrix A1 and matrix A2 to form matrix A; using an acoustic transfer function of a unit point sound source at the position of an i-th array element at each point in the sonar platform space to construct matrix B1i, and constructing an all-zero matrix B2; concatenating matrix B1i and the all-zero matrix B2 to form matrix Bi; solving using matrix A and matrix Bi to obtain a weighting coefficient qi: assuming that a signal acquired by the hydrophone array is matrix X, and thus a self-noise component on the i-th array element is expressed as ni＝qiX, subtracting ni from a signal received by the i-th array element to obtain a signal not containing the self-noise component; and implementing removal of self-noise on each array element.

A method is provided to measure the complex sensitivity of hydrophone data channels across a range of frequencies by using a water-filled tank with proximate boundaries. A hydrophone array and reference hydrophone are helically affixed to a test fixture resting on a rotation platform. When the test fixture is submerged in the tank; the platform rotates about a contour of the platform in intervals for a predetermined time interval before indexing to the next angle. Signals transmitted by an acoustic projector in the tank are received on the hydrophones of the line array and the calibrated reference hydrophone. Electrical signals from the reference hydrophone are transmitted over an electrical cable and received by the acoustic data processor for use in calibrating the hydrophone line array. Electrical signals from the hydrophones of the hydrophone line array are also transmitted to the data processor.

The invention discloses a sound barrier sound insulation characteristic evaluation method suitable for a real ship complex sound field, and belongs to the technical field of real ship sound barriers, and the method comprises the steps: arranging hydrophone arrays at acoustic mirror symmetry positions at two sides of a real ship fairing sound barrier to form an in-situ measurement pair; controlling the ship to sail at a plurality of navigational speeds, and synchronously acquiring sound pressure time domain signals on two sides; carrying out preprocessing and time-frequency analysis on the signals, and calculating sound pressure levels of a sound facing surface and a sound backing surface to obtain an in-situ sound pressure level difference; and based on the sound pressure level difference at different navigational speeds, analyzing the change rule of the sound insulation performance along with the frequency and the navigational speed, and carrying out comprehensive evaluation. In addition, by arranging a vibration sensor and a turbulence measuring device, path separation of structural sound and flow-induced noise is achieved, spatial coherence weighted average is introduced, and the accuracy and representativeness of evaluation under a complex sound field are improved. The method overcomes the limitations of laboratory test environment distortion and single working condition, and can truly and comprehensively reflect the actual sound insulation efficiency of the sound baffle in the dynamic navigation of a real ship.

The invention discloses a digital equivalent source sound field reconstruction system based on an underwater complex sound field environment. The digital equivalent source sound field reconstruction system comprises a sound pressure acquisition module which acquires radiation sound pressure data on a measurement point through a hydrophone array; the intelligent analysis module is used for performing shallow sea sound pressure Green function derivation by utilizing a shallow sea Pekeris waveguide model based on the radiation sound pressure data, and constructing an underwater sound field equivalent source equation; the compressed sensing module is used for converting an underwater sound field equivalent source equation into a compressed sensing problem based on the underwater sound field equivalent source equation, and solving a norm for reducing L1 by adopting an algorithm under an accelerated near-end gradient to obtain compressed sensing equivalent source intensity; and the sound field reconstruction module is used for constructing a free field green function, obtaining underwater reconstruction sound pressure by combining the free field green function with the compressed sensing equivalent source intensity, realizing digital equivalent source sound field reconstruction of an underwater complex sound field environment, improving data processing efficiency and reducing requirements on computing resources.

The invention discloses a vector hydrophone array orientation estimation method for performing tensor decomposition by using a propagation operator, relates to the technical field of vector hydrophone array orientation estimation, and discloses a vector hydrophone array orientation estimation method for performing tensor decomposition by using a propagation operator. The method comprises the following steps: firstly, constructing a three-dimensional array manifold tensor composed of an array direction matrix and a vector hydrophone output matrix; respectively expanding received signal tensors according to three modes, solving a propagation operator based on a column block covariance matrix, constructing a normalized signal subspace, establishing a spatial spectrum function with a noise subspace, and obtaining a pitch angle and an azimuth angle of a sound source through spectrum peak search; according to the method, high-order singular value decomposition is avoided, the operand is greatly reduced, meanwhile, high resolution and low sidelobe direction finding performance are kept, and the method is suitable for a real-time underwater acoustic direction finding system of a ship-borne platform, a buoy platform and an unmanned platform.

The utility model belongs to the technical field of overwater monitoring equipment, and particularly relates to a positioning buoy capable of automatically adjusting the laying depth of a hydrophone array. The utility model provides a positioning buoy capable of automatically adjusting the laying depth of a hydrophone array. The positioning buoy comprises a depth sensor, a cable assembly and a communication assembly. When the laying depth of the hydrophone array needs to be adjusted, the controller firstly reads a measurement value of the depth sensor. And if the measured value does not accord with the preset target depth, the controller sends an instruction to the motor, so that the motor rotates the cable roller by a certain angle according to the preset direction, and the deeper cable is released or withdrawn. And the depth of the hydrophone array connected with the deeper cable is changed along with the change of the length of the deeper cable. By adjusting the depth of the hydrophone array, the positioning buoy can be suitable for wide-range underwater acoustic passive monitoring work, and is particularly suitable for being matched with a detected acoustic target which actively produces sound, such as an underwater vehicle on which an acoustic beacon is hung, so that an underwater positioning system is formed.

The invention belongs to the technical field of light sensation detection systems, and discloses an optical fiber hydrophone array connector structure and an optical fiber hydrophone array, the connector structure comprises a wedge block assembly, an optical fiber connector assembly, an inner sheath assembly and an outer bending resistance assembly, an inner wedge block in the wedge block assembly can tightly press a force bearing metal wire of an optical cable on the inner wall of an outer wedge block, and the outer wedge block can tightly press the force bearing metal wire of the optical cable on the inner wall of the outer wedge block; the optical fiber connector assembly sleeves the wedged end of the outer wedge-shaped block and allows an optical fiber unit to extend out, one end of the inner sheath assembly is buckled and pressed on one end, far away from the wedged end, of the outer wedge-shaped block, and the other end of the inner sheath assembly is connected with a protective surface layer of the optical cable in a sealing manner; one end of the half anti-bending sleeve is connected with the half anti-bending sleeve, the other end of the half anti-bending sleeve is connected with the rubber anti-bending sleeve, the half anti-bending sleeve comprises at least two half sleeve units, the inner buckling block part of one half sleeve unit is buckled on the outer buckling groove part of the other half sleeve unit in an angle-adjustable mode, and therefore the phenomenon that the half anti-bending sleeve is prone to being damaged due to large mechanical loads can be avoided.

The invention discloses a digital twinning-AI prediction driven cofferdam directional micro-blasting system, which relates to the technical field of underwater blasting engineering, and comprises the following steps of: constructing multi-domain digital twinning, reading a compliance rule machine by a loading machine, fusing a hydrophone array, shore-based vibration and distributed optical fiber observation assimilation to form a baseline field; defining an isobaric surface leakage volume, a sector deflection angle, a closure degree and a frequency band energy ratio, and establishing two sets of equivalent boundary admittances and preselection of a switchable physical layer; training a multi-output AI element model, combining opportunity constraint and hard constraint, performing linkage optimization on a physical layer and a detonation network, and generating a linkage instruction and a sensitivity atlas; and small-dose trial explosion is executed by a hierarchical correction state machine, and on-line guarding and knowledge writing-back are carried out in combination with sequential ratio test and quantile tracking. And minute-level interpretable prediction can be realized, leakage and direction drift are inhibited, the safety of an ecological structure is guaranteed, and the construction period and the cost are reduced.

The invention belongs to the technical field of underwater acoustic detection equipment, and particularly relates to a sonar buoy underwater extensible cylindrical array which comprises a plurality of array units composed of hydrophone rods and transverse extension arms. The array unit is arranged to be folded in the space between the underwater cable bin and the buoy shell when the sonar buoy is assembled, and the array unit is automatically unfolded when the underwater cable bin leaves the buoy outer cylinder after the sonar buoy enters water to work. According to the hydrophone array, the hydrophones, the supporting materials, the elastic components and the cables are integrally designed, the structure is compact when the hydrophone array is folded, self-driving and self-locking are achieved when the hydrophone array is deployed and unfolded, unfolding risks such as winding and overturning are avoided, and the deployment depth is easy to change after the hydrophone array is unfolded.

The invention provides a method and system for measuring the sound source radiation sound power level in a reverberation pool, and the method comprises the steps: constructing a reverberation test system according to a preset standard, laying a hydrophone array and a to-be-measured sound source in the reverberation pool, and enabling the array element spacing of the hydrophone array to be smaller than or equal to the minimum half-wavelength; enabling the to-be-detected sound source to emit a to-be-detected signal, and collecting complete time domain sound pressure data of the to-be-detected signal; calculating the mean square sound pressure level of the measuring point in the reverberation control area based on the steady-state time domain sound pressure data of the sound signal; calculating complete time domain sound pressure data of all array elements based on Fourier transform to obtain a sound energy density change curve, and fitting the sound energy density change curve to obtain reverberation time; sound field correction is obtained through calculation according to the reverberation time, and the radiation sound power level of the sound source to be measured is obtained according to the sound field correction. According to the invention, the experiment process is simplified, the measurement efficiency is obviously improved, the experiment cost is reduced, and a new technical approach is provided for the rapid measurement of the water pool of the sound source radiation sound power level.

The invention relates to an underwater target passive positioning technology in a horizontally changing shallow sea waveguide, and mainly relates to a matching mode target passive positioning method combined with a bidirectional coupling normal wave theory. According to the method, firstly, a bidirectional coupling normal wave model based on a multi-modal admittance method is established for the boundary value problem of a Helmholtz equation in a horizontal change shallow sea waveguide, the model considers modal coupling and backscattering effects, and a high-precision copy sound field and a modal coefficient calculation result of the copy sound field can be provided; then extracting a modal coefficient of a measurement field from data received by the vertical hydrophone array; and finally, processing the modal coefficient of the copy field and the modal coefficient of the measurement field by using a matching mode processor to obtain a fuzzy surface, and estimating the distance and depth information of the underwater target. According to the invention, the conventional matching mode positioning algorithm is improved from the perspective of underwater acoustic physics, and the positioning performance of the conventional matching mode algorithm in the horizontally changing shallow sea waveguide is improved.

The invention discloses a compact quaternary hydrophone array and a sound source localization method, the compact quaternary hydrophone array comprises a regular tetrahedron framework and a support device, and the regular tetrahedron framework is arranged on the support device; the regular tetrahedron framework comprises a regular tetrahedron composed of a plurality of square rigid supports, hydrophone supports arranged at the four vertexes of the regular tetrahedron, and hydrophones arranged on the hydrophone supports. The compact quaternary hydrophone array provided by the invention is simple in structure and convenient to assemble, and can also reduce the influence of sound wave scattering on a space sound field and improve the sound source positioning precision.

The invention relates to a water turbine flow channel discharge noise monitoring and fault identification system and method, interference type optical fiber hydrophone arrays are arranged at a top cover between a rotating wheel and a movable guide vane, a volute mandoor and a draft tube straight cone section mandoor, discharge noise in a flow channel is directly measured, and after photoelectric conversion, signal amplification, analog-to-digital conversion and band-pass filtering, the discharge noise in the flow channel is detected. Blind source separation is carried out by using FastICA, features are extracted in combination with empirical mode decomposition (EEMD) and an energy method, audible sound and ultrasonic frequency bands are monitored at the same time, and feature type identification is carried out in combination with an existing fault feature database based on dynamic time warping (DTW) and a support vector machine (SVM) algorithm; the output signal-to-noise ratio and the anti-interference capability of the system are improved, multi-directional analysis of discharge noise characteristics is achieved, the monitoring range is wide, the fault recognition speed is high, the accuracy is high, and the system is mainly used for monitoring the running state of the water turbine in real time, finding and early warning faults in time and improving the running maintenance efficiency of the water turbine.

The present invention provides a method and system for calibrating the attitude of a fiber optic vector hydrophone and its array. The attitude calibration method includes: a sound source transmits a signal and rotates around the fiber optic vector hydrophone; an acoustic energy flow method is used to obtain the azimuth angle θ of the fiber optic vector hydrophone corresponding to the sound source; the X+ axis direction of the fiber optic vector hydrophone is determined based on the obtained azimuth angle; the deviation angle Δθ between the current attitude heading of the hydrophone and the X+ axis direction is determined based on the attitude sensor in the fiber optic vector hydrophone, and the fiber optic vector hydrophone is attitude calibrated so that the X+ axis direction of the fiber optic vector hydrophone coincides with the attitude heading. This solves the problem in the prior art of being unable to ensure that the X+ axis of the fiber optic vector hydrophone is consistent with the heading angle of the attitude sensor during navigation, thereby improving the application capability of the fiber optic vector hydrophone array in target azimuth measurement and the array azimuth estimation accuracy.

The present invention provides a high-resolution imaging method and system for a hydrophone array, which are applied to the field of imaging data processing. By drawing a sound field distribution diagram and analyzing imaging quality indicators, the present invention can monitor and adjust the array layout and signal acquisition strategy in real time to ensure that a high imaging quality is maintained under different environmental conditions. At the same time, by combining acoustic signals of different frequency bands and weighted fusion of frequency band characteristics, the imaging clarity can be improved under different depths and environmental conditions. By activating a phased array to control the phase relationship between each hydrophone and adjusting the beam direction in real time, the signal can be focused in a specific area, thereby improving the effectiveness of target detection and imaging and avoiding imaging blind spots.

The invention provides an underwater positioning method based on a single hydrophone, which belongs to the technical field of underwater azimuth measurement, and comprises the following steps: a signal acquisition step: acquiring an underwater sound signal; a signal preprocessing step; a virtual hydrophone array simulation step; a frequency domain snapshot matrix compensation step: performing phase compensation on the frequency domain snapshot matrix in the frequency domain; a beam forming and angle estimating step; and a sound source positioning step of calculating the horizontal distance of the sound source relative to the virtual hydrophone array and the depth of the sound source according to the depth-angle data so as to complete underwater target positioning. According to the underwater positioning method based on the single hydrophone, the underwater sound signals of different depths are collected through the single hydrophone, the virtual hydrophone array is constructed, the horizontal distance and depth of the sound source relative to the virtual hydrophone array are calculated, the sound source is positioned through the single hydrophone, the cost is lower, and the hydrophone is easy to arrange.

A survey system including a multibeam echo sounder having a projector array and a hydrophone array uses a multi-component message to ensonify one or more fans to estimate a Doppler velocity.

The invention discloses an underwater vertical acoustic array autonomous unfolding device, and belongs to the technical field of underwater operation tools. The guide cylinder has an open upper end and a closed lower end; the guide cylinder is coaxially sleeved with the cable cylinder, and the lower end of the cable cylinder is fixed to the outer edge of the lower end of the guide cylinder. The hydrophone array is spirally wound on the outer wall of the guide cylinder, and the lower end of the spirally wound hydrophone array is fixed with the outer edge of the guide cylinder; the floating ball is accommodated in the inner cavity of the guide cylinder, and the floating ball is connected with the upper end of the spirally wound hydrophone array; the water pressure release mechanism is fixedly arranged on the outer wall of the top of the cable drum; one end of the pressing plate is rotationally connected with the side, away from the water pressure releasing mechanism, of the top outer wall of the cable drum through a pin shaft, and the other end of the pressing plate can be locked by a locking piece of the water pressure releasing mechanism. And the pressing plate limits the floating ball in the inner cavity of the guide cylinder. The underwater vertical acoustic array autonomous unfolding device realizes automatic release of the floating ball and automatic unfolding of the hydrophone array at a specific depth, is high in reliability, and can be repeatedly used.

The invention relates to a multi-source intelligent combined pose measurement method for a floating hydrophone array, and the method comprises the following steps: 1, obtaining the pose information of each node of the hydrophone array through a multi-source sensing module, and synchronously receiving sound signals and extracting the TDOA information of each node under the condition that the sound source position is known; step 2, constructing a measurement equation based on TDOA information, and performing inverse solution on the position of each node of the hydrophone array in combination with a hyperbolic positioning principle and a sound velocity model; according to the method, an inverse solution positioning mode of'known sound source position and inverse solution of receiving array node position 'is adopted, a flexible underwater acoustic array dynamic measurement scene under the traction of a floating platform is specially aimed at, the technical limitation that traditional TDOA and USBL positioning depends on a fixed geometric structure is broken through, the method does not need to arrange a plurality of reference receiver arrays, and the positioning accuracy is improved. And a high-precision synchronous clock system is not needed, and high-precision acoustic positioning can be realized only by depending on a single sound source and the distributed nodes, so that the system complexity and the field deployment cost are remarkably reduced.

The present invention discloses an adjustable submersible noise measurement system, comprising an underwater instrument cabin, an optoelectronic transmission cable, an optical fiber hydrophone array, an expander, a mooring device, and a surface communication buoy. The optical fiber hydrophone array receives noise signals radiated by underwater targets and transmits the signals to the underwater instrument cabin via the optoelectronic transmission cable. The underwater instrument cabin is fixed to the seabed by the mooring device and connected to the surface communication buoy. The expander is fixed to the seabed by a hook anchor, and the optical fiber hydrophone array is adjusted by the expander to achieve horizontal deployment. The underwater instrument cabin and the expander are positively buoyant structures, thereby forming a trapezoidal structure underwater. The present invention utilizes the expander to retract and extend the optoelectronic transmission cable and hook anchor to control the entire array to be horizontal underwater and stabilize the array's posture. When the array's posture reaches the required posture for equipment testing, the expander stops working, and the equipment is now in a silent state and does not generate any noise, thereby reducing the impact of noise generated by the equipment itself.

The present application relates to the technical field of ultra-short baseline direction measurement data processing, and particularly relates to a direction estimation method of a multi-element stereo hydrophone array. The method approximates sound waves as plane waves and establishes a mathematical relationship between time difference of arrival (TDOA) and a direction vector, takes TDOA as an observation value, calculates a direction vector estimation value according to a weighted least square method, then calculates the equivalent weight of the observation value according to an equivalent weight function, further replaces the original observation value weight array with an equivalent weight array, and recalculates the direction vector according to the weighted least square method, iteratively calculates the equivalent weight and the direction vector, until the difference between the direction vectors of two consecutive times is less than a manually set threshold, and the direction vector is output as the direction of the multi-element stereo hydrophone array. The present application can weaken the influence of the sound ray bending which is not considered in the direction estimation function model, and consider the influence of the array element spacing and the target direction on the direction estimation, thereby improving the accuracy and reliability of the direction estimation of the multi-element stereo hydrophone array.

The invention discloses a hydrophone array multi-sound-source positioning method based on a frost ice optimization algorithm, and belongs to the field of sound source positioning. According to the method, a linear hydrophone array is constructed, an underwater sound source positioning scene is set, and a sound source signal is collected and processed to obtain a receiving signal; a MUSIC algorithm is used to process the received signal, a spatial spectrum is generated to preliminarily estimate information such as an azimuth angle and a pitch angle of a sound source, normalization processing is carried out on the spatial spectrum, a gravitational force area and a repulsive force area are divided, and a gravitational force-repulsive force type artificial potential energy field is constructed; an independent sub-population is initialized for each sound source by adopting a frost ice RIME optimization algorithm, individual positions are updated in combination with an artificial potential energy field and a frost puncture mechanism in an iterative updating process, and particles with the highest fitness are selected as final estimation positions through iterative search. The method overcomes the limitation of a traditional optimization algorithm, remarkably improves the precision and reliability of sound source positioning, and is particularly suitable for a multi-sound-source positioning scene in a complex underwater sound environment.

The application discloses a passive sonar ranging method and device for a linear fiber hydrophone array, which comprises the following steps: performing primary beam forming according to original data at a first position, searching for a first azimuth angle with the maximum signal strength according to the primary beam forming result; performing secondary beam forming according to original data at a second position, searching for a second azimuth angle with the maximum signal strength according to the secondary beam forming result; and then calculating the target distance according to the first azimuth angle, the second azimuth angle, the speed and the running time. Compared with triangulation, the method and the device can reduce the measurement deviation caused by the uncertainty of the position of the fiber hydrophone array, the distance variance is smaller, and the reliability is higher in actual use.

The application discloses a kind of ship underwater noise tracking monitoring device and method, the method includes the following steps: 1) the monitoring device is installed to ship;2) keep ship in the channel in the state of stop, each hydrophone is monitored in the channel ambient noise, and data acquisition equipment records ambient noise signal;3) according to test condition, ship equipment is normally opened or runs;4) ship is normally navigated in the channel, and data acquisition equipment records the sound wave signal measured by hydrophone;5) based on the ambient noise monitored in step 2), the sound wave signal measured by each hydrophone is removed ambient noise, and all the noise-removed underwater radiated noise signals of the ship are analyzed and processed.The application is arranged with tracking measurement hydrophone array around the ship, and the ship is monitored under various conditions in line with the actual situation, with the real ship flow field around the ship during navigation, and the monitoring result has high accuracy.

The present invention belongs to the technical field of underwater cable laying, and specifically relates to an unmanned autonomous deployment system for hydrophone array cables based on multi-submersible collaborative programmable systems. After an operating vessel carrying a hydrophone array cable reel arrives at an operating area, multiple groups of unmanned submersibles are released, and the front end of the hydrophone array cable passes through the lower sleeve of a three-way connector carried by each unmanned submersible in sequence. The operating vessel assigns tasks to each unmanned submersible. During the movement of the unmanned submersible, a tension sensor monitors the tension between the electromagnet device and the motor slider, thereby calculating the tension on the hydrophone array cable. The tension is adjusted by the movement of the motor slider on the guide rail to ensure that the tension fluctuation of the hydrophone array cable during underwater deployment is controlled within ±2%, achieving constant tension control. When all unmanned submersibles arrive at the designated location, the electromagnet devices they carry are simultaneously controlled to be disabled, and the three-way connector carrying the hydrophone array cable sinks to the predetermined position, completing the deployment task.

The invention belongs to the technical field of underwater acoustic sensor manufacturing processes, and particularly relates to a fully-wrapped hydrophone filling and sealing device and a filling and sealing method. The filling and sealing device comprises an upper mold, a lower mold, a suspension bracket, a cover plate and a vacuum oven; wherein the upper mold and the lower mold are used for encapsulating the shape of the hydrophone after being assembled; the suspension support is installed on the upper die and used for enabling an oscillator and a circuit board of the hydrophone to suspend at designated positions of an upper die cavity and a lower die cavity. The cover plate is arranged on the upper die and is used for flattening the upper surface of the hydrophone; and the vacuum oven is used for vacuumizing and high-temperature curing of the pouring sealant solution. The hydrophone array and the circuit are suspended in the potting mold through the hydrophone array suspension bracket, the appearance of the hydrophone is manufactured through the potting mold, and bubbles in the potting glue solution are removed through the vacuum oven, so that the polyurethane glue full-wrapping bubble-free potting of the hydrophone is achieved, the principle is simple and clear, the method is simple and convenient, and the operability is high.