825 results about "Hydrophone" patented technology

The invention belongs to the technical field of underwater topographic survey, and particularly relates to an underwater topographic survey system based on multi-sensor data fusion, which comprises a multi-beam sounding sonar, a laser radar sensor, an ultrasonic bathymeter, an optical fiber hydrophone, a side scan sonar and a data processing and fusion module. The invention further relates to an underwater topographic survey method, and the method adopts a Kalman filtering data fusion algorithm. According to the invention, multiple types of sensors such as a multi-beam sounding sonar, a laser radar, an ultrasonic bathymeter, an optical fiber hydrophone, a side-scan sonar and the like are integrated into the same system for the first time, and an acoustics, optics and mechanics multi-dimensional data acquisition system is formed.

An internal solitary wave (ISW) early warning method for an offshore platform based on a baroclinic mode includes the following steps: S1: providing a hydrophone and a bottom-founded transmitting transducer in a sea area of an offshore platform, and acquiring an actually measured sound pressure; S2: solving a hydrodynamic equation to obtain a baroclinic mode of the sea area of the offshore platform; S3: constructing a seawater sound velocity equation according to the baroclinic mode; S4: transforming the seawater sound velocity equation to obtain a relational expression between an amplitude of the baroclinic mode and a seawater sound velocity; S5: solving, according to the actually measured sound pressure, and the relational expression between the amplitude of the baroclinic mode and the seawater sound velocity, the amplitude of the baroclinic mode with a genetic algorithm (GA); and S6: performing monitoring and early warning on an ISW.

Disclosed embodiments provide techniques for automated passive acoustic monitoring with machine learning. An acoustic sensor is accessed. The acoustic sensor includes an embedded acoustic controller which hosts a machine learning model. The acoustic sensor is coupled to one or more hydrophones. The acoustic sensor is deployed in a body of water and is submerged. The acoustic sensor can enter a sleep mode. The hydrophones receive an underwater audio signal. The audio signal can be associated with an acoustic pressure. The acoustic sensor can be woken from sleep when the acoustic pressure is above a pressure threshold. The machine learning model classifies a predicted source of the underwater audio signal. The classifying can be based on filtering the underwater audio signal for a first frequency band associated with a source of interest. The predicted source is reported to a user using a communications device.

The invention discloses a deep-sea self-expanding horizontal array acoustic subsurface buoy, which relates to the field of deep-sea underwater acoustic detection and comprises an expanding platform arranged at the top of the acoustic subsurface buoy, a subsurface buoy main body positioned below the expanding platform and an anchoring structure connected below the subsurface buoy main body, the subsurface buoy body comprises a buoyancy platform arranged below the unfolding platform and an equipment platform arranged below the buoyancy platform. The problem that a hydrophone linear array composed of a plurality of large-scale acoustic linear arrays is folded and automatically unfolded into a cross horizontal array is solved, and integration of a deep-sea acoustic emission system, an acoustic receiving system, an underwater acoustic communication system and an equipment supply system is achieved. The whole subsurface buoy can be quickly and conveniently released and recycled, and high-reliability anchor mooring is achieved.

The invention discloses a quasi-zero stiffness metamaterial vibration reduction mounting structure of an underwater vehicle hydrophone, which belongs to the technical field of underwater vehicles, and comprises an oil seal end cover mounted at the front end of a front fairing of an underwater vehicle, a mounting rack fixed at the front end part of the oil seal end cover, and two quasi-zero stiffness vibration reduction components arranged in front of and behind the mounting rack, the outer side parts of the quasi-zero-stiffness vibration reduction components are connected with the mounting frame, concave parts for clamping the end parts of the hydrophone are formed in the middle parts of the quasi-zero-stiffness vibration reduction components, and a mounting space for arranging the hydrophone is formed between the two quasi-zero-stiffness vibration reduction components; and the two ends of the hydrophone are respectively clamped and clamped in the concave parts of the two quasi-zero stiffness damping components. According to the quasi-zero-stiffness metamaterial damping device, through conformal design, vibration attenuation, structure optimization and energy-saving effects, an efficient, stable and low-noise hydrophone installation solution is provided for an autonomous underwater vehicle, and the performance of the quasi-zero-stiffness metamaterial damping device in underwater detection and signal acquisition is remarkably improved.

The invention discloses a water supply pipeline leakage identification method based on active low-frequency sound wave excitation, and the method comprises the steps: obtaining a sound signal in a pipeline through a low-frequency sound emission transducer and a hydrophone which are disposed at two ends of the pipeline, and generating a corresponding leakage point position based on a pre-constructed sound wave equation; processing the sound signal to obtain a corresponding time-frequency image, labeling the time-frequency image by judging whether the sound signal is a leakage signal or not, and forming a data set by a signal frequency spectrum, a leakage point position and a label; constructing an identification network; training an identification network by using the data set to obtain a water supply pipeline leakage identification model for identifying whether the pipeline is leaked or not; and inputting the sound signal in the to-be-identified pipeline into the water supply pipeline leakage identification model so as to output an identification result about whether the pipeline is leaked or not and an identification result about the position of a leakage point. The invention further provides a water supply pipeline leakage identification device. The method provided by the invention can effectively improve the accuracy of leakage identification.

The invention relates to the technical field of measurement of mechanical vibration or ultrasonic waves, water sound waves or infrasonic waves, in particular to a vibration liquid column hydrophone calibration device and method based on laser interferometry, and the device comprises a laser vibration meter, a hydrophone to be measured, a liquid column cavity for suspending the hydrophone to be measured, and a vibration table connected with the liquid column cavity. The to-be-measured hydrophone is detachably connected with an adjusting and positioning mechanism, the adjusting and positioning mechanism is connected with a laser vibration measuring instrument for executing vibration measurement, the adjusting and positioning mechanism and the laser vibration measuring instrument are introduced, the problem that accurate calibration of the low-frequency hydrophone cannot be achieved in the prior art is solved, and through sound field modeling calculation and correction, accurate calibration of the low-frequency hydrophone is achieved. The technical problem that the uncertainty and deviation of a hydrophone sensitivity calibration result caused by a non-uniform sound field cannot be effectively reduced in the prior art is solved.

The invention discloses a diaphragm type EFPI optical fiber sonic sensor with a sensibilization structure, and relates to the field of optical fiber sensing and underwater acoustic signal communication. The sensor is composed of an optical fiber unit, a threaded sleeve and a sensitization shell which are connected in sequence. The single-mode optical fiber is embedded into the optical fiber ceramic ferrule as a first reflecting surface and inserted into the threaded sleeve in a combined manner, and the chromium-gold composite film is attached to the outer side of the threaded sleeve as a second reflecting surface through epoxy resin glue; the sensitization shell is combined with the threaded sleeve in a screwed mode, the chromium-gold composite film is protected, sound signals are gathered, and the sensitization effect is achieved. The invention has the following advantages and positive effects: (1) the FZP sensitization structure improves the minimum detectable sound pressure of the hydrophone and enhances the capability of identifying weak small signals; (2) the designed water pressure balance hole contributes to the water pressure in the F-P cavity and the outside, and can be suitable for deepwater operation; and (3) the nano-scale transduction film of the film type EFPI sensor can be protected to a certain extent, and the film type EFPI sensor can be suitable for changing environments.

The invention belongs to the technical field of underwater target radiation noise measurement, and particularly relates to a sparse combination array measurement system and method for underwater target radiation noise measurement, a program and a storage medium. A sparse combined array formed by a sound pressure spiral double-cone volume array with a sparse structure and a sound pressure vector nested vertical linear array is designed, a combined array frequency-division testing scheme of a high-frequency volume array and a low-frequency vertical linear array is adopted, a combined measurement method of a sound pressure hydrophone and a vector hydrophone is utilized, a measurement frequency band is extended, and the measurement precision is improved. And effective measurement of the full-band radiation noise of the underwater target is realized. Through a sparse array arrangement structure and an improved constant-beam-width beam forming method, a two-dimensional steady constant-beam-width beam is obtained while the number of array elements is reduced and the array complexity is reduced, and an appropriate main lobe width and a lower side lobe level can be adjusted according to a measured target and a measurement distance. According to the method, the array element redundancy of the measurement array is reduced, and the method can be flexibly applied to various application scenes of underwater radiation noise measurement.

The invention discloses an underwater focusing intense sound system and method based on phase control, and relates to the technical field of focusing intense sound, and the technical scheme is characterized in that a measurement and control upper computer is used for controlling the emission and detection of a trigger signal; the phase control signal generator is used for controlling a phase control signal of sound wave emission; the multi-channel power amplifier is used for driving the acoustic emission phased area array, and the acoustic emission phased area array is used for emitting acoustic waves; the area array calibration hydrophone is used for receiving signals of reflected sound waves; the target calibration sound source is used for transmitting a signal pulse width, the target sound field measurement hydrophone is used for receiving the signal pulse width transmitted by the target calibration sound source and forwarding the signal pulse width to the measurement and control upper computer, and the measurement and control upper computer receives the forwarded signal pulse width for system evaluation and correction. By generating the high-energy strong-focusing sound field and combining the actual underwater signal propagation process, accurate positioning and control of the underwater strong sound field can be completed, so that accurate focusing irradiation and high-resolution imaging of a long-distance small target are realized.

The invention provides a method and a system for positioning an underwater target with known depth. The method comprises the following steps: adopting a cross array as a receiving array; the two hydrophones in the horizontal direction form a first group of hydrophones, and the two hydrophones in the vertical direction form a second group of hydrophones; receiving a pulse signal of a target sound source, and estimating a time difference of arrival through a secondary cross-correlation method; estimating the pitch angle of the target sound source according to the time difference of arrival of the second group of hydrophones; estimating the azimuth angle of the target sound source according to the pitch angle of the target sound source and the time difference of arrival of the first group of hydrophones; and estimating the target sound source distance according to the target sound source depth and the pitch angle. The method has the advantages that under the condition that only the depth of the target position is known and the sound source and the receiving array cannot communicate, the target sound source can be accurately and rapidly subjected to direction finding and positioning. The method can be widely applied to an underwater passive sonar system with a known target depth, and can be expanded to a weak signal detection system.

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 invention discloses a signal data real-time acquisition, storage and transmission device applied to a hydrophone, and the device comprises a plurality of sound wave receivers disposed on a measurement platform to form a matrix layout; receiving sound wave signals of different underwater paths, and performing electric signal conversion; analyzing the received sound wave signal, extracting signal data of the sound wave, and calculating the arrival angle of the sound wave signal; calculating the position of a target signal source, determining main signals in different paths, and correcting the main signals; the corrected signal data is transmitted to a storage device for segmented storage; according to the invention, the plurality of receivers are deployed on the measurement platform to form the matrix layout, and the position of the target signal source is calculated, so that the main signals received by the receivers are determined, the multipath effect caused by water body boundary reflection is eliminated, the main signals are corrected, the quality and accuracy of the signals are improved, and the measurement accuracy is improved. And accurate transmission and storage of underwater signals are ensured, so that the performance of the hydrophone system in a complex underwater environment is ensured.

The invention provides a spherical complex vibration type vector hydrophone based on an MEMS accelerometer, and relates to the technical field of underwater acoustic signal detection, and the spherical complex vibration type vector hydrophone comprises an MEMS accelerometer, a built-in core, a piezoelectric ceramic spherical shell, a sound transmission sealing shell, and a suspension ring. The MEMS accelerometer is orthogonally arranged in the built-in core; the built-in core is nested in the lower half ball of the piezoelectric ceramic spherical shell; the upper hemisphere of the perforated piezoelectric ceramic spherical shell is adhered to the upper edge of the built-in core; the sound transmission sealing shell coats the piezoelectric ceramic spherical shell through an encapsulation process; the suspension ring is bonded with the sound transmission sealing shell, and the hydrophone is suspended on the fixing support for use. The composite hydrophone can detect sound pressure signals and vibration velocity signals at the same position underwater, solves the problem of omnidirectional detection of the composite hydrophone on the sound pressure signals, and has the advantages of small size, simple structure, high reliability, wide application range and the like.

The invention discloses an internal wave acoustic feature extraction method based on energy jitter, and the method comprises the following steps: S100, internal wave region acoustic signal preprocessing: sequentially carrying out the filtering processing and noise cancellation processing of a multi-channel acoustic signal obtained by a hydrophone, and obtaining an acoustic signal time-frequency diagram through windowed short-time Fourier transform; and S200, extracting internal wave sound energy jitter characteristics: acquiring data in a specific time period based on the acoustic signal time-frequency diagram, and processing and analyzing frequency point energy to obtain an energy jitter spectrum. The method is high in accuracy, low-frequency and high-frequency signals, carrier noise and background noise are effectively suppressed by comprehensively preprocessing the multi-channel acoustic signals, and subsequently extracted internal wave acoustic features are more accurate and reliable. The method is high in timeliness, the internal wave sound energy jitter characteristics can be extracted from the time-frequency image efficiently, and the internal wave information processing speed is increased to a certain extent.

The invention relates to the technical field of acoustic testing, in particular to a method for testing sensitivity of optical fiber curved surface array hydrophones, which comprises the following steps of: after determining coordinates of a sound source, each hydrophone of an optical fiber curved surface array and a standard hydrophone on a water test platform, transmitting a single-frequency pulse signal by the sound source; after the data acquisition system respectively acquires a signal received by the standard hydrophone and signals received by each hydrophone of the optical fiber curved surface array, the data analysis system generates an analog sound source signal, and direct waves received by the standard hydrophone and each hydrophone of the optical fiber curved surface array are quickly found by using a related algorithm; the optical fiber curved surface array hydrophone sensitivity testing method solves the problem of synchronization of different acquisition systems, is an effective supplement to an existing optical fiber curved surface array hydrophone sensitivity testing method, and has a wide application prospect.

The invention relates to the technical field of underwater acoustic positioning, discloses an OFDM (Orthogonal Frequency Division Multiplexing) sound source distance and depth estimation method based on a single hydrophone, and aims to realize parallel processing of communication positioning tasks and efficient utilization of underwater time-frequency resources and promote development of light-weight and low-energy-consumption equipment adaptive to an underwater unmanned small platform. According to the OFDM sound source distance and depth estimation method based on the single hydrophone, the frequency domain input and output relation of a communication system under a multi-path channel is combined, an observation model used for target positioning is constructed through comb-shaped pilot frequency, a multi-snapshot measurement matrix is constructed through a space domain smoothing means, multi-path time delay estimation is achieved based on a rotation invariant subspace algorithm, and the estimation accuracy is improved. And then target positioning is realized by adopting a channel time delay feature matching method. The OFDM sound source distance and depth estimation method based on the single hydrophone provided by the invention is suitable for integrated information processing of the single hydrophone, has the advantages of miniaturization, light weight and portability, and is suitable for an underwater unmanned small platform.

The invention relates to the field of water supply systems, and discloses an urban pipeline leakage monitoring system based on a DMA partition management technology, and the system comprises a data collection module which is used for collecting the data of a flowmeter, a pressure sensor and a hydrophone in a DMA partition; the data preprocessing module is used for preprocessing the data; the time sequence analysis module is used for performing seasonal and trend decomposition and nonlinear time sequence analysis on the preprocessed data; the leakage detection module is used for predicting and detecting leakage; the noise analyzing and positioning module is used for analyzing and determining the specific position of the leakage point of the pipe section through the noise data of the hydrophone; and the real-time prediction alarm module is used for processing data in real time and triggering alarm when leakage is detected. The system not only can predict a potential leakage event in advance, but also can quickly position and give an alarm when leakage occurs, so that the operation efficiency and safety of the water supply system are greatly improved.

The invention discloses a laser-induced sound cross-medium communication method based on passive relay PWM modulation, and relates to the technical field of cross-medium communication. The method comprises the following steps: adjusting the laser pulse width of to-be-sent information, and carrying out PWM modulation to obtain a PWM sequence; inputting the modulation sequence into a laser driving control module, and driving a laser to emit a laser pulse signal with specific pulse width change; laser energy is focused on the surface of a passive relay material, and when laser pulses with different pulse widths act on the material, different numbers of sound signals can be excited and generated; a receiving end captures sound signals propagating across media through a hydrophone, and demodulates the sound signals according to a mapping relation between pulse width and the number of the sound signals; and finally, original information is restored, so that cross-medium communication from air to water is completed. According to the invention, PWM modulation is combined with a passive relay material, and the system has the remarkable advantages of no need of underwater power supply, simple structure, high reliability and the like.

The invention discloses a hydrophone low-frequency sensitivity calibration method based on time domain scaling average processing, relates to the technical field of hydrophone low-frequency sensitivity calibration, and solves the problem of inaccurate direct sound wave amplitude measurement caused by boundary sound reflection superposition of an experimental pool and a measuring device in hydrophone calibration. Comprising the following steps: placing a light-reflecting and sound-transmitting thin film in a water body, and carrying out transducer and thin film laying and laser focusing; the underwater sound pressure value is reproduced based on a laser interference method; when reflection sound and direct sound superposition occurs in low-frequency measurement data, adjacent frequency points are selected to carry out multiple times of measurement. The arrival time of the direct sound is accurately measured by transmitting the high-frequency sound pulse, so that alignment of starting points of waveform data with different frequencies is realized; when low-frequency measurement is carried out, not only data of the inspected frequency is collected, but a narrow frequency band near the inspected frequency is selected, and multi-frequency-point data is sequentially collected and subjected to subsequent algorithm processing.

The invention provides a fish ingestion intensity evaluation method based on improved VGG16 and a spectrogram, and relates to the field of aquaculture. The method comprises the following steps: acquiring fish ingestion sound signals by adopting a hydrophone, dividing the ingestion sound signals into four types of intensities of'strong ', 'medium', 'weak 'and'no', manually marking the ingestion sound signals, converting the sound signals into spectrograms, and constructing a fish ingestion sound signal data set; an attention mechanism fusion module is designed, the attention mechanism fusion module is integrated on a convolutional neural network, a fish ingestion sound signal data set is used as input, and automatic grading of ingestion intensity is achieved. The method provided by the invention can efficiently evaluate the fish ingestion intensity so as to judge the fish appetite. The method can be applied to fish feeding strategy optimization and behavior research.

The present invention discloses a cross-sound zone sound source localization method using dual hydrophones in a deep-sea environment, comprising: step 1: using the dual hydrophones to receive broadband signals radiated by a sound source in a specified sea area, and simultaneously using other hydroacoustic equipment to obtain environmental parameters of the sea area; step 2: using a time-spectral energy accumulation method to extract the arrival times of different sound lines from the received signal of one of the hydrophones, and estimating two multipath time delay differences; step 3: using a sound field calculation model BELLHOP to simulate two multipath time delay differences in different sound zones when the sound source is at different grid virtual points; step 4: calculating a cost function, and estimating the position of a target sound source; step 5: repeating steps 2 and 4 for the signal received by another hydrophone, and estimating the position of the target sound source; and step 6: performing a similarity analysis on four estimation results obtained by positioning the two hydrophones, and taking the average of the two estimation results with the greatest similarity as the final sound source position estimation result.

The invention provides a moving target Doppler compensation coherent detection method and system based on a single-vector hydrophone, and the method comprises the steps: S1, collecting a receiving signal of the single-vector hydrophone, and carrying out the segmentation of the receiving signal, and obtaining segmented data; s2, estimating a scale factor of the received data of the current segment according to the segmented data; s3, compensating the corresponding segmented data according to the scale factor to obtain a compensated signal; and S4, performing coherent accumulation processing on the compensated signal to obtain a sound intensity detection result, namely signal-to-noise ratio gain. The scale factor is a Doppler coefficient. Based on the improvement of a conventional sound pressure Doppler compensation method, in view of the advantages of the vector hydrophone, a new moving target Doppler compensation coherent detection method based on the single vector hydrophone is provided, and the detection performance of the single vector hydrophone on the moving target is improved.

Systems and Methods for Labelling Sonar Data A computer-implemented method is provided of automatically labelling passive sonar hydrophone data for use as a supervised learning dataset, comprising: for a selected passive sonar hydrophone: obtaining actual received sound data throughout a detection time-period, obtaining a hydrophone location, and determining a maximum detection radius around the hydrophone location; retrieving timestamped vessel data associated with vessels within the maximum detection radius during the detection time-period, the timestamped vessel data comprising for each vessel: vessel location information and vessel identification information; determining, for a particular vessel identification information, an estimated received sound metric for each vessel throughout the detection time-period, based on the timestamped vessel data; labelling the actual received sound data, the labels including the particular vessel identification information and being associated with times during the detection time-period where the estimated received sound metric is above a threshold.

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 relates to a device and a method for measuring the radial acceleration sensitivity of a circular tube hydrophone. The device comprises a base, a hasm, an end cover, a to-be-measured circular tube hydrophone, a sliding block, a preamplifier, an accelerometer and a vibration exciter, wherein a plurality of mounting holes with different sizes are formed in the bottom of the base, so that vibration exciters with different interfaces can be mounted in a matched manner; the top of the base is a semicircular pipe with a semicircular cross section, the semicircular pipe is horizontally arranged, two sliding grooves are formed in the inner wall of the semicircular pipe in the length direction of the semicircular pipe, a plurality of sliding blocks are connected in each sliding groove in a sliding mode, the inner end faces of the sliding blocks are conformal with the sliding grooves, the outer end faces of the sliding blocks are in an arc shape, and the size of each sliding block is matched with the outer diameter of the circular tube hydrophone to be measured. On the basis that an accelerometer method is used for testing, through the structural integrated design of the hydrophone and the pre-amplification circuit, and the signal transmission process is in an electromagnetic shielding environment, design defects existing in an existing scheme are effectively avoided.

The invention relates to the technical field of ultra-short baseline positioning, in particular to an ultra-short baseline positioning method and system based on a TDOA observation value and an effective sound velocity, and the method comprises the steps: constructing a spatial geometric distance mathematical relationship between a hydrophone and a sound source target according to a position vector of the hydrophone in a USBL system in a carrier coordinate system, and building an ultra-short baseline TDOA observation equation; unknown parameters of the ultra-short baseline TDOA observation equation comprise an effective sound velocity parameter and a sound source position vector parameter; substituting the effective sound velocity approximate value and the sound source position vector approximate value into an ultra-short baseline TDOA observation equation to linearize the ultra-short baseline TDOA observation equation; and iteratively solving the linearized ultra-short baseline TDOA observation equation by using a least square method criterion, and obtaining a final effective sound velocity and a final sound source target position vector according to a solving result. The method can be suitable for a USBL system with TDOA as an original observation value, can avoid the influence of sound ray bending, is simple in calculation principle, and can be embedded into a novel USBL positioning system for use.

Disclosed in the present invention are an underwater acoustic communication device having a wireless energy harvesting function, and an underwater acoustic communication method. The underwater acoustic communication device is composed of a hydrophone, an on-duty circuit module, a received information processing module, an energy harvesting module, an energy storage module, a single-chip microcomputer minimum system, a data storage unit, a sent information processing module, a power amplifier module, an impedance matching circuit, a loudspeaker, a sensor, and an interface. According to the underwater acoustic communication device having the wireless energy harvesting function in the present invention, vibration energy caused by acoustic waves in a water body can be converted into electrical energy, and the electrical energy is stored in the energy storage module, so that energy is provided for all the low-energy-consumption modules in the device, the service life of a power supply of the whole underwater acoustic communication device can be prolonged, and the frequency of battery recycling can be reduced. The device can also receive and decode useful signals, and report anomaly data to a target node when the sensor collects the anomaly data, and is suitable for long-time underwater operation.

The invention belongs to the technical field of underwater acoustic test platforms, and particularly relates to a marine information experiment teaching platform based on a master-slave teleoperation system. The system comprises a master-end device and a slave-end device, a master-slave teleoperation system is carried in the master-end device, and a virtual model of the slave-end device is established in the master-slave teleoperation system; an experimenter operates the virtual model of the slave-end device through the master-slave teleoperation system, and the master-slave teleoperation system converts the action of the virtual model of the slave-end device into a control instruction and transmits the control instruction to the slave-end device; after receiving the control instruction, the slave end equipment adjusts the pose state of the transducer and the hydrophone; an experimenter sends an electric signal to the transducer through the master-slave teleoperation system, the transducer converts the electric signal into an underwater acoustic signal to be spread in the experimental pool, the hydrophone feeds back the underwater acoustic signal to the master-end equipment after receiving the underwater acoustic signal, and remote teleoperation processing of the experimenter on the experimental process is achieved.

The invention provides a device for screening noise stress resistant pseudosciaena crocea based on behavior response. The device comprises a culture system, a behavior monitoring system and a noise stimulation system, the culture system comprises a circulating water device arranged at the water tank, an oxygenation pump, a temperature sensing control switch and a heating rod; the behavior monitoring system comprises a monitor above the water tank and an underwater temperature-sensing depth-sensing monitor at the water tank; the noise stimulation system comprises a control module, a sound stimulation audio synthesis module, a sound stimulation signal release module and an underwater acoustic characteristic acquisition and analysis module. The underwater acoustic characteristic acquisition and analysis module comprises a hydrophone, a power amplifier and an AD converter; the screening device stimulates the large yellow croakers in the water tank through noise directionally played by the noise stimulation system, and the behavior monitoring system analyzes state changes of the large yellow croakers under noise stimulation so as to screen out the large yellow croakers resistant to noise stress. The method can be used for researching the behavior response of the pseudosciaena crocea under different noise stresses, and can be used for screening the pseudosciaena crocea individuals tolerant to noise stresses.