The invention discloses a hydrophone array structure and belongs to the technical field of hydrophones. The hydrophone array comprises a hydrophone array element and a main cable, wherein the hydrophone array element comprises an oil-filled barrel, an electronic compartment is mounted on the top of the oil-filled barrel, and a flange is mounted on the bottom; Hough rings are arranged both on the electronic compartment and the flange; a mounting slot is provided on the main cable, and the hydrophone array element is mounted on the main cable via the Hough rings. A separate hydrophone array element is used with a main cable to achieve a fast array, and the fault repair is basically not limited by environmental conditions.

Hydrophone array structure

The invention discloses an optical fiber sound-temperature-pressure composite sensor, mainly comprising a fiber bragg grating demodulator, a narrow linewidth light source, an optical fiber combiner, afiber bragg grating temperature sensor, a fiber bragg grating pressure sensor, an optical fiber isolator, an optical fiber coupler, a sensing arm, a reference arm, a Faraday rotating mirror A, a Faraday rotating mirror B, an optical fiber filter, and an optical fiber hydrophone demodulator. The optical fiber sound-temperature-pressure composite sensor disclosed by the invention is based on wavelength division multiplexing fiber bragg grating and a Michelson interferometer, improves the integration degree of an ocean sound-temperature-pressure detection system, and integrates the fiber bragg grating temperature sensor, the fiber bragg grating pressure sensor and the optical fiber hydrophone, a fiber bragg grating temperature-pressure sensor is connected with a Michelson optical fiber hydrophone in series in a wavelength division multiplexing manner, so that underwater temperature, pressure and sound signals can be monitored at the same time, and the frequency of the underwater sound signals is effectively identified, the optical signals of the fiber bragg grating and the optical fiber hydrophone are completely independent from each other and are not interfered by each other, and atechnical means is provided for marine information extraction.

Optical fiber sound-temperature-pressure composite sensor

The invention relates to an acoustic-electromagnetic integrated detection and communication integration cable array. The acoustic-electromagnetic integrated detection and communication integration cable array is formed by connecting a plurality of segments of standardized sub-cables with one another, wherein each segment of sub-cable includes a hydrophone (1), an acoustic signal processing module(2), a first electrode (3), a second electrode (4), an electric field signal processing module (5), a magnetic sensor (6), a magnetic field signal processing module (7), a relay module (8), a first watertight connector (9), a second watertight connector (10) and a watertight cable (11). The acoustic-electromagnetic integrated detection and communication integration cable array integrates comprehensive measurement of characteristics of a sound field, an electric field and a magnetic field of an underwater target, integrates the sensors, the signal processing modules and the cables, and adopts photoelectric composite cables for multi-node power supply and long-distance signal transmission. The acoustic-electromagnetic integrated detection and communication integration cable array has the advantages of simultaneous measurement of multiple physical fields, high reliability of signal transmission, convenient collection and placement, arbitrary expansion and the like, and can be widely applied in fields of underwater target detection, underwater security, remote early warning, marine resource exploration and the like.

Acoustic-electromagnetic integrated detection and communication integration cable array

The invention relates to a synchronous self-contained hydrophone underwater acoustic signal acquisition system and a working method. The system comprises an electromagnetic induction coupling module,a self-contained hydrophone, an electromagnetic induction synchronous cable and a seawater contact terminal, the electromagnetic induction coupling module comprises a wet end and a dry end, the wet end is located outside a watertight cabin of the self-contained hydrophone and comprises a magnetic ring capable of being opened and closed, and an induction coil is wound around the magnetic ring. Thedry end is located in the self-contained hydrophone and comprises a modulation and demodulation module, a clock module and a reference frequency generation module. The dry end and the wet end are connected through a watertight cable; the electromagnetic induction synchronous cable sequentially penetrates through the magnetic rings in the wet ends, and the two ends of the electromagnetic inductionsynchronous cable are connected with the seawater contact terminals to form a loop. The system utilizes the electromagnetic induction coupling synchronization module, the electromagnetic induction synchronization cable and the seawater contact terminal to realize synchronous acquisition between the self-contained hydrophones.

Synchronous self-contained hydrophone underwater acoustic signal acquisition system and working method

The invention aims to provide a hydrophone array applied to marine mammal sound production monitoring. The hydrophone array comprises a watertight compartment, a first hydrophone, a second hydrophone,a third hydrophone, a fourth hydrophone and a support; the support is connected with the watertight compartment and provided with four top ends; the first hydrophone, the second hydrophone, the thirdhydrophone and the fourth hydrophone are arranged at the four top ends of the support correspondingly; the watertight compartment comprises an acquisition card, a storage card and a battery; the first hydrophone, the second hydrophone, the third hydrophone and the fourth hydrophone are connected with the acquisition card through signal lines, and the acquisition card is connected with an externalupper computer and the storage card through signal lines; and the battery is connected with the acquisition card to supply power to the acquisition card. The hydrophone array has the beneficial effects that the structure is simple, operation is easy and reliable, and the hydrophone array can be efficiently applied to marine mammal sound production research.

Hydrophone array applied to marine mammal sound production monitoring

The invention provides a synchronous multi-parameter acquisition type self-contained hydrophone and an array design method thereof. The synchronous multi-parameter acquisition type self-contained hydrophone comprises a hydrophone cabin, an electronic cabin, a sensor cabin, a power supply module, a hydrophone body, a pre-amplifier unit, a band-pass filter, a differential driver, an A/D conversion unit, an SD card, a control circuit, a synchronous circuit, and a temperature pressure sensor. The power supply module provides power for the pre-amplifier unit, the band-pass filter, the differentialdriver, the A/D conversion unit, the SD card, the control circuit, the synchronous circuit, and the temperature pressure sensor simultaneously. The hydrophone has various parameters to meet differentmeasurement requirements and has functions of ultra-low power consumption, large-capacity storage, sleeping, fixed-time startup and the like to adapt to different working environments. The self-contained hydrophone has the microsecond accurate synchronization and online monitoring functions and anti-winding, quick dismounting and mounting, and hydrophone space changing characteristics; convenienceis provided for forming an array; and the application value is great.

Synchronous multi-parameter acquisition type self-contained hydrophone and array design method thereof

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Synchronous multi-parameter acquisition type self-contained hydrophone and array design method thereof