240 results about "Hydrophone" patented technology

The invention relates to the technical field of underwater acoustic engineering and ocean exploration, in particular to a multi-channel underwater acoustic signal transmitting and measuring system and a signal processing method, which are used for solving the problems that the existing multi-channel underwater acoustic signal processing generally depends on fixed threshold detection or simple time sequence alignment, and the signal processing efficiency is low. The problem that residual vibration, local noise abrupt change or multipath reverberation is easily misjudged as an effective first arrival signal in a complex underwater environment due to the fact that the influence of the physical response characteristic of a transducer on emission time calibration is not considered and effective verification on whether a candidate arrival structure accords with a sound wave propagation physical rule is lacked is solved. According to the invention, a multi-channel energy time sequence and hydrophone space geometrical relationship is fused through an underwater sound propagation initial physical judgment module, a judgment mechanism is constructed based on distance-time consistency of sound propagation, and self-consistent verification is realized by combining a cross-channel arrival sequence and sound velocity constraint. And the accuracy, the robustness and the physical interpretability of the judgment of the effective launching time of the underwater sound are obviously improved.

The utility model relates to an electrical system for a submarine sediment acoustic in-situ measurement device, which belongs to the technical field of submarine measurement electrical control and comprises a shipborne part and an underwater part which are connected through a photoelectric composite cable. The shipborne part is used for controlling the work of the underwater part; wherein the underwater part comprises a plurality of modular units which are connected through standardized interfaces, and the modular units comprise a main control unit, an acoustic measurement unit, a power amplifier unit, a transducer unit, a hydrophone unit and a power supply unit. According to the electrical system for the acoustic in-situ measurement device for the submarine sediments, through modular design, the adaptability and universality of the electrical system are improved; and moreover, a worker can add corresponding units or modules according to measurement requirements, so that the expandability of the system is improved, and different measurement scenes and requirements are better met.

The invention discloses a wide dynamic underwater sound acquisition method suitable for an underwater glider and a hydrophone, and the method comprises the steps: configuring a unique hydrophone into four parallel band-pass filtering and amplifying circuits, each band-pass filtering and amplifying circuit having different acquisition frequency bands; after the underwater glider enters water, underwater sound collection is carried out based on the only installed hydrophone, and underwater sound signals of four collection frequency bands are collected at the same time through four parallel band-pass filtering and amplifying circuits. Through four paths of differentiated gains and frequency segmentation, the wide dynamic full frequency band can be covered, the dynamic range is improved, a single hydrophone integrates four channels, cables and installation space among multiple devices are saved, and the underwater glider compact layout is adapted; the channels are activated on demand, the total power consumption can be reduced, and the endurance time is prolonged. Under the conditions of low power consumption and limited volume of the underwater glider, wide dynamic range signal acquisition can be realized, and signals can be processed in real time.

A system and corresponding method perform underwater distance determination. The system comprises a hydrophone unit (HU) located at a reference point, a first sensor module (SM), and a second SM, each located underwater. The first SM sends a first sensor-to-hydrophone data signal and a first sensor-to-hydrophone synchronization signal to the HU and sends a first inter-sensor synchronization signal to the second SM. The second SM sends, responsive to receipt of the first inter-sensor synchronization signal from the first SM, a second inter-sensor synchronization signal to the first SM. The second SM sends a second sensor-to-hydrophone data signal to the HU. The first SM measures a time value representing a total travel time of the first inter-sensor synchronization signal from the first SM and second inter-sensor synchronization signal from the second SM and calculates a distance between the first SM and second SM based on the time value measured.

The invention provides a deep-sea high hydrostatic pressure resistant ionic polymer hydrophone structure and an assembly method, and belongs to the technical field of underwater acoustic sensing, the deep-sea high hydrostatic pressure resistant ionic polymer hydrophone structure comprises an upper shell, a shielding copper net, a substrate, a circuit board, a lower shell, a dry state sensitive film, a screw, a pressing plate, a positive electrode and a negative electrode, the shielding copper net is arranged at the top of the lower shell, a dry-state sensitive film is fixed on the front surface of the substrate, a circuit board is adhered to the back surface of the substrate, the substrate is inserted into the lower shell, a cavity at the lower part of the substrate is encapsulated and cured, and after the pressure-resistant shell is packaged, water is injected into the shell of the ionic polymer hydrophone and defoaming is performed. And finally, sealing and curing the water injection hole of the lower shell by using a sealant to form the ionic membrane polymer hydrophone. According to the invention, perfect packaging, low sound wave loss and good low-frequency sensitivity of the hydrophone in a deep water condition can be ensured, and the hydrophone has important popularization and application values for the work of the hydrophone in a deep sea level.

The invention discloses a water supply pipeline leakage positioning method, which comprises the following steps: arranging hydrophones at two ends of a water supply pipeline to be detected, collecting sound wave signals of the water supply pipeline to be detected, carrying out band-pass filtering pretreatment on the sound wave signals, and decomposing noisy signals into a series of intrinsic mode functions through variational mode decomposition; dividing the intrinsic mode functions into noise dominant components and signal dominant components by calculating sample entropy values of the intrinsic mode functions; performing wavelet threshold denoising processing on the noise dominant component, and reconstructing the processed noise component and the signal dominant component to obtain a denoised signal; and performing generalized cross-correlation operation on the denoised signal by adopting an improved weighting function to obtain a time difference estimated value. According to the invention, through improved time delay estimation after precise component classification, a coherence function is introduced, and through enhancement of a high-coherence frequency band and suppression of a low-coherence frequency band, the positioning precision in a low signal-to-noise ratio environment is significantly improved, the anti-interference capability is enhanced, and the method adapts to a multi-scene pipe network environment.

The application discloses a net cage fish feeding state recognition method based on high-low frequency dual hydrophones, comprising: deploying a low-frequency hydrophone and a high-frequency hydrophone at the same monitoring point in the net cage, and continuously collecting underwater acoustic signals jointly; performing time-frequency analysis on the collected underwater acoustic signals, extracting low-frequency energy features and high-frequency pulse features respectively, and constructing a joint feature sequence for feeding state discrimination; performing sequence feature calculation on the joint feature sequence, and recognizing the fish feeding state according to the judgment baseline and the state discrimination rule, including before feeding, during feeding and after feeding. The application realizes accurate recognition of the net cage fish feeding state through high-low frequency dual hydrophone cooperative sensing, improved time-frequency analysis, dual threshold pulse detection and joint state discrimination.

The invention relates to the technical field of MEMS (Micro Electro Mechanical System) sensors, and discloses a cap cilia MEMS vector hydrophone, which comprises cap cilia used for sensing sound to generate vibration for transmission; the center mass block is arranged at the bottom of the cap-shaped cilium, the cap-shaped cilium is located in the center of the top of the center mass block, and the center mass block is used for receiving vibration transmitted by the cap-shaped cilium and diffusing the vibration; the four cantilever beams are fixedly connected to the front face, the rear face, the left face and the right face of the center mass block respectively and used for receiving vibration transmitted by the center mass block and generating deformation. And the square frame is arranged outside the four cantilever beams. The cap-shaped cilia has a larger sound wave receiving area than the traditional cilia, the cap-shaped structure can generate larger on-beam stress on the cantilever beam when receiving sound pressure signals with the same size, so that the piezoresistor generates larger resistance change, the hydrophone is simple and mature in manufacturing process, the cap-shaped cilia does not need secondary integration, and the cost is low. And the consistency of the hydrophone is ensured.

An embedded hydrophone sensor in a hydraulic body such as pipe, fitting, or flow meter (PIPE) that includes a thinned "pipe" wall membrane of radius R, that has a profile that provides sufficient flexural deflection under pressure with effective thickness t_pipe. A piezo-electric element connected to the pipe membrane using a glue or mechanical means, while the piezo membrane thickness should be less than pipe_membrane thickness multiplied by (maximum_strain_Piezo / maximum_strain_Pipe).

The invention discloses a high-gain spatial directivity construction method of a single-vector hydrophone, and relates to the technical field of underwater acoustic signal processing. Acquiring a sound pressure signal and a three-dimensional vibration velocity signal of the target area by using a three-dimensional vector hydrophone; equally dividing the orientation guide angle of the three-dimensional vector hydrophone to obtain a plurality of guide directions; for each guide direction, extracting a horizontal vibration velocity component in the three-dimensional vibration velocity signal, and obtaining two paths of dipole combined vibration velocity signals in each guide direction according to the horizontal vibration velocity component; performing synthetic convolution operation according to the sound pressure signal and the two paths of dipole combined vibration velocity signals in each guide direction to obtain a plurality of synthetic convolution combined signals in each guide direction; and according to the response of all the synthetic convolution combination signals in each guiding direction, obtaining the corresponding synthetic convolution combination directivity. According to the invention, high-gain high-order combination directivity is constructed, and the stability of the detection precision of an underwater weak target is improved.

The invention discloses a single hydrophone orientation device and method based on an acoustic metamaterial, and relates to an underwater acoustic engineering technology. By designing a three-dimensional geometric structure and utilizing an acoustic metamaterial to construct an auxiliary device, the orientation of an incident sound wave is determined based on a single hydrophone; the device comprises a honeycomb-shaped cylindrical base and a wedge-shaped acoustic grating group which are distributed asymmetrically; the honeycomb-shaped cylindrical base is divided into N grids, the sound grids in the wedge-shaped sound grid set are fixed to the grids in a one-to-one correspondence mode, and the lengths of the internal coiling structures of the sound grids are arranged in a differentiated mode. The direct wave time and the acoustic grating wave time received by the scalar hydrophone are extracted, the time difference is calculated to reversely deduce the propagation distance increment, and the length of the acoustic grating coiling structure is matched to determine the sound source orientation. The device is simple in structure, low in cost and easy to manufacture and install, can be used for transformation of an existing scalar hydrophone, enables the scalar hydrophone to have an orientation function, improves the detection capability of a single hydrophone, and has important application value for a detection system and a mobile platform deployed in a large range.

The application discloses a thin-wall cylindrical fiber hydrophone with an internal acoustic wave diffraction structure and belongs to the technical field of acoustic wave detection, and solves the technical problem of low axial acoustic wave absorption utilization rate of an existing hydrophone. The fiber hydrophone comprises a thin-wall metal cylinder, a sensing optical fiber, a fixed end cover and a diffraction-negative Poisson ratio composite internal structure coaxially arranged in the cylinder, the composite internal structure comprises an acoustic wave diffraction unit and a negative Poisson ratio amplification unit. The acoustic wave diffraction unit guides and diffracts the axial incident acoustic wave to the negative Poisson ratio amplification unit; the negative Poisson ratio amplification unit generates axial deformation under the action of sound pressure and efficiently converts the axial deformation into radial force through the negative Poisson ratio structure, drives the thin-wall metal cylinder to generate radial deformation, and further drives the sensing optical fiber to generate strain. The application can significantly improve the absorption utilization rate and axial sensitivity of the axial acoustic wave, meanwhile, the original radial high sensitivity is maintained, and the omnidirectional detection performance of the hydrophone is improved.

The invention discloses an offshore wind plant underwater noise monitoring method, which comprises the following steps: equipment preparation and assembly: preparing an underwater noise monitoring unit for monitoring, the underwater noise monitoring unit being composed of a hydrophone, a rope, a buoy and a balancing weight; measuring an underwater noise background value: adopting one underwater noise monitoring unit to carry out underwater noise monitoring at a position which is in the upwind direction of the offshore wind power plant and is a certain distance away from the boundary of the site; influence range and attenuation characteristic measurement: respectively aiming at a single unit, two units and a plurality of units in the offshore wind power plant, adopting the underwater noise monitoring unit to carry out underwater noise monitoring; data collection and processing: recovering all the arranged underwater noise monitoring units, exporting monitoring data, analyzing and processing the monitoring data, and further quantitatively evaluating the influence range and attenuation law of underwater noise; according to the invention, systematicness, reliability and analyzability of underwater noise monitoring data in the operation period of the offshore wind plant are improved.

The application discloses a typhoon direction estimation method and system based on a single vector hydrophone and a terminal, and relates to the field of typhoon direction estimation.The method comprises the following steps: strictly checking sound pressure and three-directional vibration velocity data collected by the single vector hydrophone to ensure data quality; then, pre-processing the data, including filtering to remove noise interference; then, normalizing the filtered data; then, calculating sound intensity in each direction within a certain azimuth and pitch search range, constructing a sound intensity matrix, and finding the azimuth and pitch corresponding to the maximum sound intensity as the real reference value; dividing the processed data into a training set and a test set according to a certain proportion; constructing a multilayer perception machine model; and through experiments of different learning rates and small batch sizes, optimizing the model, selecting the parameters with the minimum loss to train the best model; finally, using the trained model to predict the test set to obtain the estimated value of the typhoon azimuth and pitch angle.The application effectively improves the accuracy of typhoon direction estimation.

The invention relates to the technical field of underwater acoustic engineering and ocean exploration, in particular to a 24-bit low-power-consumption data acquisition system which comprises a signal conditioning module, an AD (analog-digital) data acquisition module, an FPGA (field programmable gate array) control module, a data storage module and a power conversion module. The AD data acquisition module completes analog-to-digital conversion, digital signals are transmitted to the FPGA control module for real-time processing and are transferred to the data storage module, and the processed data are uploaded to an upper computer. The AD7768 chip is adopted, the FFT calculation module is integrated to achieve 1 / 3 octave analysis, the overall power consumption is smaller than or equal to 2 W, the background noise at the frequency band of 1 kHz is smaller than-37 dB / square root Hz, data collection setting of 5 seconds to 10 minutes is supported, and the underwater acoustic signal collection device has the advantages of being high in precision, low in power consumption and high in stability and is suitable for long-term underwater acoustic signal collection scenes of underwater subsurface buoys, buoys and the like.

The application provides a deep-water breakwater foundation settlement monitoring method and system, and relates to the technical field of ocean engineering. The method comprises the following steps: based on a breakwater design drawing, a plurality of hydrophone nodes are installed in at least two monitoring areas of an underwater foundation and connected to a monitoring host, and an underwater acoustic monitoring network is generated; the network nodes are controlled to synchronously collect underwater sound pressure fluctuation signals, and multi-channel sound pressure signal data is obtained; based on the data, two-by-two cross-correlation calculation is performed on different node channel signals, and a noise interference spectrum is obtained; time delay values and energy values of stable cross-correlation peaks in the spectrum are identified and measured, and cross-correlation function characteristic parameters are generated; finally, based on the parameters, a pre-trained settlement inversion model is used for calculation, and settlement distribution information of the breakwater foundation is generated, so that non-contact, wide-area, continuous and quantitative monitoring of the deep-water breakwater foundation settlement is realized.

The application discloses a full-directional hydrophone, which comprises a hydrophone sensitive probe, a data acquisition module, a data storage module and a power management module, wherein the hydrophone sensitive probe comprises a spherical packaging shell, a ring-shaped PCB board, a front-stage signal processing circuit and a bidirectional micro-mechanical ultrasonic transducer; the bidirectional micro-mechanical ultrasonic transducer comprises a substrate, and the top surface and the bottom surface of the substrate are provided with symmetrically arranged insulating layers, lower electrode layers, device layers, vacuum cavities and upper electrode layers. The full-directional hydrophone has the advantages of scientific design, reasonable structure and good use effect, and achieves the purpose of having the same sensitivity to sound pressure signals within the 360-degree range of the plane where the hydrophone is located.

The invention provides an underwater acoustic communication modulation identification method, and the method comprises the steps: firstly, obtaining an underwater acoustic communication modulation data set, building a sample set based on the data set, the sample set comprises multiple types of samples, and each type of sample corresponds to one modulation feature; thirdly, performing feature extraction on various samples by using a feature extraction network in a pre-trained multi-path residual network model to obtain high-dimensional feature vectors of the samples; then, carrying out dimensionality reduction on the high-dimensional feature vector by using a t-SNE technology; respectively calculating a CH index of t-SNE dimension reduction results of each type of samples, and screening modulation features according to the results; and finally, obtaining an optimized multi-channel residual network model based on the screened modulation features. According to the underwater acoustic communication modulation identification method provided by the invention, t-SNE dimensionality reduction analysis is used to screen multivariate modulation identification features, and modulation identification is carried out by using modulation features with good category discrimination, so that the model generalization ability and the identification precision are significantly improved.

The invention belongs to the technical field of medical treatment and automatic control, and particularly relates to an ultrasonic microneedle element sound field measurement method and equipment, in the method, a space coordinate system is established based on a hydrophone coordinate, the position and posture of a hydrophone are accurately controlled in combination with a displacement mechanism, the problem of interference of a microneedle piece on ultrasonic propagation is directly solved, and the accuracy of sound field data is ensured. The upper computer integrates the functions of frequency determination, distance calibration, coordinate system generation and path planning, drives the displacement mechanism to automatically traverse measurement points according to a preset sampling interval, thoroughly replaces manual point-by-point operation, and improves the efficiency. A complete closed loop is formed from resonance frequency calibration to sound field distribution generation, personal errors are eliminated, and reliable data support is provided for a targeted drug delivery technology.

The present application relates to the technical field of computer, and especially relates to a kind of underwater acoustic transducer transmission performance index evaluation method and device.When receiving start evaluation instruction, controller controls signal generator to input first voltage to the transducer to be measured, and synchronously obtains the second voltage of the transducer to be measured on oscilloscope and the first sound pressure time history of standard hydrophone output end;Subsequently, the second voltage and the first sound pressure time history are synchronously processed using multi-signal decomposition technology to obtain the third voltage and the second sound pressure time history;Finally, the transmission voltage response level is determined based on the processed data, so as to accurately characterize the underwater acoustic transducer transmission performance index.The method optimizes signal acquisition and processing process, effectively balances detection efficiency and calculation accuracy, and provides a better solution for transducer performance evaluation.

The invention discloses a hydrophone for pipeline monitoring and a manufacturing method, a sound transmission shell is embedded in a middle mounting area of a main shell, the sound transmission shell is of a cylindrical structure, and a sensitive element is arranged in the sound transmission shell; a rear end cover is arranged at the end part of the main shell; an integrally-formed annular limiting convex edge is arranged at the end, close to the main shell, of the sound transmission shell, a limiting clamping groove is formed in the position, corresponding to the limiting convex edge, of the inner wall of the main shell, and a sealing ring and a sealing ring pressing ring are sequentially assembled in the limiting clamping groove; a first cavity is arranged in the sound transmission shell, an annular gap is formed between the outer wall of the sensitive element and the inner wall of the first cavity, and the annular gap is used for encapsulating the impedance matching layer; positioning convex edges are uniformly arranged on the edges of the first end cover and the second end cover in the circumferential direction, and the outer diameter of the positioning convex edges is matched with the inner diameter of the first cavity; the end face of the rear end cover is provided with three through holes. The central through hole is used for the penetration of an external cable. And the other two through holes are glue injection holes.

The application provides a kind of nanometer crack-based underwater acoustic sensor and its preparation method, belongs to hydrophone technical field.The method first, in the flexible polymer surface deposition a layer of metal film, spin coating a layer of photoresist on the metal film surface of flexible polymer, photoresist and metal film patterning;Second, the photoresist on the metal film is again patterned;Third, the flexible polymer and metal film are bent to produce nanometer crack on the metal film;Finally, the flexible polymer, polymethyl methacrylate, glass sheet are bonded, and after injecting pure water in the cavity, it is sealed to obtain underwater acoustic sensor.The nanometer crack-based underwater acoustic sensor manufactured by the application has ultra-high sensitivity, by bonding the nanometer crack sensing unit with ultra-high sensitivity and flexibility on the substrate with cavity, the ultra-sensitive detection of low-frequency underwater acoustic can be realized, and the detection range of the underwater acoustic sensor is improved.

The present application belongs to the technical field of underwater acoustic communication and sensing integration, and particularly relates to an improved single-vector hydrophone OFDM-Chirp hybrid waveform modulation and dual-function implementation method, program, device and storage medium. The present application eliminates the periodicity of the embedded complex Chirp pilot in the time domain by using a discrete uniform distribution random sequence and a random phase optimization sequence, and improves the sensing performance of the integrated waveform. The embedded non-uniform complex Chirp pilot signal of the present application can realize copy correlation processing without high side peaks at the receiving end to perform synchronization. In the case of the same time-frequency resource consumption, the sensing and communication integrated waveform of the present application does not need additional time-frequency resources to transmit a synchronization header, and the synchronization difficulty of the receiving end of the present application is low. Under the same modulation parameters, the correlation characteristics of the non-uniform complex Chirp pilot designed by the present application are about 1.5 dB higher than those of the non-uniform QPSK pilot, and the sensing performance is better.

1. The name of the design product: hydrophone. 2. The use of the design product: for collecting underwater acoustic signals. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The application discloses a water supply pipeline leakage positioning method, comprising arranging hydrophones at both ends of a water supply pipeline to be measured, collecting sound wave signals of the water supply pipeline to be measured, carrying out band pass filtering pretreatment on the sound wave signals, decomposing the noise-containing signals into a series of intrinsic mode functions through variational mode decomposition, classifying the intrinsic mode functions into noise dominant components and signal dominant components by calculating sample entropy values of the intrinsic mode functions, carrying out wavelet threshold denoising processing on the noise dominant components, reconstructing the processed noise components and the signal dominant components, and obtaining the signals after denoising; and carrying out generalized cross-correlation operation on the signals after denoising by using an improved weighted function to obtain a time difference estimation value. The improved time delay estimation after accurate classification of components, the introduction of a coherence function, the enhancement of a high-coherence frequency band and the suppression of a low-coherence frequency band can significantly improve positioning accuracy in a low signal-to-noise ratio environment, enhance anti-interference capability, and adapt to multiple scene pipeline network environments.

The application discloses a bow sonar demonstration device based on a GPU parallel architecture, which mainly comprises a hardware system, a software system and a demonstration model, wherein the hardware system is used for completing a teaching task of simulating an operating sonar, wherein a GPU is used as a signal processing machine to provide large-scale parallel computing capacity and ensure real-time construction of a complex acoustic scene; the software system comprises signal processing software and display control software and is used for simulating teaching demonstration of basic sonar functions including noise warning, tracking, listening and feature analysis; and the demonstration model comprises one or more of a vector hydrophone model, a scalar hydrophone model, a sound base array model and a submarine model. The device realizes the visualization of abstract concepts of sonar equipment through three-dimensional dynamic visualization and real-time signal feedback.

The invention provides a grating interference type optical fiber hydrophone with directivity compensation and a preparation method, and relates to the technical field of optical fiber sensing, the grating interference type optical fiber hydrophone comprises grating array optical fibers of different networks, an elastic sensitization layer and an outer sheath, the outer sheath wraps the elastic sensitization layer, and the elastic sensitization layer wraps the grating array optical fibers. The outer sheath is used for transmitting a pressure change signal generated by a sound pressure signal to the elastic sensitization layer, the elastic sensitization layer wraps grating array optical fibers of different networks, a plurality of gratings are inscribed on the fiber core layer at preset intervals, any two gratings form an array element, and the array element is arranged on the fiber core layer. And the grating array optical fibers of different networks are networked into array elements with unequal array element lengths and equal array element intervals. According to the invention, the directional response characteristic of the hydrophone can be improved.

The application discloses an electric response nanofiber composite film and a preparation method and application thereof, and the preparation method comprises the following steps: vacuum drying and grinding a metal organic framework material UiO-66, dissolving the obtained UiO-66 powder in N,N-dimethylformamide, and ultrasonic treatment to make the UiO-66 powder uniformly dispersed; dissolving PVDF powder in the solution, stirring until the PVDF powder is completely dissolved, adding acetone to obtain an electrospinning precursor solution; electrospinning the electrospinning precursor to obtain a PVDF / metal organic framework composite nanofiber film; and then performing drying and annealing treatment to obtain the electric response nanofiber composite film. The composite film has high flexibility, a high specific surface area, excellent piezoelectric response and sound-electric conversion efficiency, and solves the problems of low beta phase content and poor force-electric coupling efficiency of traditional organic piezoelectric materials; the composite film has a wide application prospect in the fields of flexible piezoelectric sensors, sound wave detectors, hydrophones and wearable sound-electric devices.

The application discloses a water acoustic signal motion noise suppression method and device based on a vector magnetic sensor and belongs to the technical field of low-frequency ocean environment physical field monitoring. The method uses a vector magnetic sensor carried on a mooring platform to collect magnetic field signals in real time, obtains a relative angle change sequence representing platform attitude change by calculating the minimum rotation angle of magnetic field vectors at adjacent moments. The sequence is taken as a reference input, and acoustic signals collected synchronously by a hydrophone are input into a variable step adaptive filter; the filter dynamically adjusts the step according to the energy of the reference input, estimates and offsets low-frequency noise introduced by platform motion in the acoustic signals, and outputs the suppressed water acoustic signals. The application realizes real-time and adaptive suppression of platform motion noise through joint processing of magnetic fields and acoustic fields, solves the problem that a traditional method is difficult to distinguish low-frequency motion interference from effective acoustic signals, and significantly improves the water acoustic observation precision and data quality of the mooring platform under complex sea conditions.

The utility model discloses a hydrophone for detecting a self-focusing transducer and a sound intensity test system, and relates to the technical field of sound field test hydrophones, the hydrophone comprises an acoustic wave guide rod, a hydrophone body and an acoustic board, a mounting cavity in the middle of the hydrophone body enables the acoustic wave guide rod to be suspended through a fixing assembly, and the acoustic board is arranged in the mounting cavity. The sound absorption plate is arranged on the upper end face of the hydrophone body, a through hole of the sound absorption plate is aligned with the receiving end of the guide rod, focused sound waves can pass through the sound absorption plate, reflected waves and stray sound waves can be absorbed, the signal purity is improved, and meanwhile the sound intensity testing system comprises the hydrophone, a water tank, an installation base and a tester. According to the invention, the position of the focal core can be dynamically positioned, the focal region range is accurately defined, and the detection precision is greatly improved by optimizing the medium, enhancing the structural vibration resistance and reducing the signal noise.