CN111521972A - A wave glider-based ocean acoustic information acquisition system for fixed depth - Google Patents

Abstract

A wave glider-based ocean acoustic information acquisition system for depth determination belongs to the field of ocean environment detection equipment. In order to solve the problem that the current ocean acoustic information acquisition system is difficult to continuously observe for a long time, the scope of the observation is limited, and the noise interference of the detection information is relatively large. The wave glider of the system of the invention is located on the water surface, and the underwater tow body is connected to the wave glider through a fixed-depth towing cable and a telescopic vibration damping mechanism; the fixed-depth towing cable is the carrier for the wave glider to communicate with the underwater acoustic tow body; the wave glider An acoustic beacon is set up to periodically send positioning sound pulses to the underwater three-dimensional acoustic stereo array; the hydrophone converts the acoustic signal in the ocean into an electrical signal, and the acoustic data acquisition and transmission module collects and filters the signal, combined with the underwater The accurate latitude and longitude information of the three-dimensional acoustic stereo array is stored in the internal memory synchronously. It is mainly used to obtain fixed-depth ocean acoustic information.

Description

A wave glider-based ocean acoustic information acquisition system for fixed depth

technical field

The invention belongs to the field of marine environment detection equipment, and in particular relates to an acquisition system for marine acoustic information for depth determination.

Background technique

Marine acoustic information is an important parameter of the marine environment, including marine environment background noise, marine biological acoustic signals, and ship acoustic signals. Various marine environmental parameters can be obtained through marine acoustic information, and it is also an important parameter that affects the performance of sonar. .

Current marine acoustic information acquisition systems, such as shipborne acoustic observation systems, submerged buoy acoustic observation systems, and shore-based array acoustic observation systems, etc., shipborne acoustic observation systems consume a lot of manpower and material resources, making it difficult to continuously observe for a long time; The system can only observe at fixed points, and the scope of observation is limited; the cost of shore-based array observation system is high, the maintenance cost is high, and the observation site cannot be maneuvered. Moreover, the current ocean acoustic information acquisition system, due to the influence of the detection environment, makes the noise interference of acquiring acoustic information relatively large, so the accuracy of the results should be improved.

SUMMARY OF THE INVENTION

The present invention aims to solve the problems of difficulty in continuous observation for a long time, the problem of limited observation range, and the problem of relatively large noise interference of detection information in the current ocean acoustic information acquisition system.

A fixed-depth ocean acoustic information acquisition system based on a wave glider, comprising a surface wave glider, a fixed-depth towing cable, a telescopic vibration damping mechanism and an underwater three-dimensional acoustic stereo array;

The wave glider is provided with a satellite communication unit and GPS, which are respectively used for communication with satellites and positioning of the wave glider;

The underwater three-dimensional acoustic array includes an underwater towed body, a wing plate, a hydrophone and an acoustic data acquisition and transmission module; the hydrophone is set on the wing plate of the underwater towed body, and the acoustic data acquisition and transmission module is set in the underwater drag on the body;

There is a weight on the fixed-depth towing cable, and the weight stabilizes the underwater acoustic tow body at a preset underwater depth; one end of the fixed-depth towing cable is also provided with a telescopic vibration damping mechanism, and the fixed-depth towing cable is connected to the water through the vibration reduction mechanism. The lower tow body; the wave glider is located on the water surface, and the underwater tow body is connected to the wave glider through the fixed-depth towing cable and the telescopic vibration damping mechanism; the fixed-depth towing cable is the carrier for the wave glider to communicate with the underwater acoustic tow body;

An acoustic beacon is installed on the wave glider, and the acoustic beacon sends positioning acoustic pulses to the underwater three-dimensional acoustic stereo array at regular intervals. The data acquisition and transmission module in the underwater three-dimensional acoustic stereo array receives the acoustic pulse signal and solves the underwater three-dimensional acoustic stereo The position of the array relative to the wave glider, combined with the longitude and latitude information obtained by the GPS on the wave glider, the accurate longitude and latitude information of the underwater three-dimensional acoustic stereo array is calculated;

The hydrophone converts the acoustic signals in the ocean into electrical signals, and the acoustic data acquisition and transmission module collects and filters the signals, and stores the accurate latitude and longitude information of the underwater three-dimensional acoustic stereo array in the internal memory synchronously. The azimuth and frequency parameters of the received marine acoustic signals and ship acoustic signals are uploaded to the satellite communication unit in the wave glider.

Further, the acoustic data acquisition and transmission module performs signal acquisition and filtering, and uses synchronous self-capacitive storage in the process of synchronously storing the accurate longitude and latitude information of the underwater three-dimensional acoustic stereo array in the internal memory.

Further, the wave glider is also provided with a solar panel, and the solar panel supplies power to the components of the wave glider.

Further, the underwater three-dimensional acoustic stereo array is not provided with batteries, the power supply of the underwater three-dimensional acoustic stereo is powered by the solar panels of the wave glider, and the fixed-depth towing cable is the carrier for the wave glider to supply power to the underwater acoustic tow body.

Further, the underwater three-dimensional acoustic three-dimensional array balances the weight and buoyancy through the weight expansion and vibration damping mechanism, and configures the whole as a neutral buoyancy, which is stable at a certain depth underwater.

Further, the underwater drag body of the underwater three-dimensional acoustic array is designed with a slender streamlined revolving body, and the hydrophone is equipped with a diversion cover, and the diversion cover is designed to reduce flow resistance.

Benefit of the present invention:

The invention can automatically navigate according to the route, automatically obtain the marine environmental acoustic information on the route, without continuous intervention of the staff, and can obtain the marine acoustic information under severe sea conditions, thereby improving the efficiency of acquiring the marine acoustic information and reducing the labor cost.

The invention adopts solar energy to supply power to the underwater three-dimensional acoustic stereo array, and there is no disposable or rechargeable battery in the underwater three-dimensional acoustic stereo array, so that the volume and cost are reduced, and the underwater three-dimensional acoustic stereo array can work for a long time at sea.

The invention adopts the underwater fixed-depth towing cable and the telescopic vibration damping mechanism to connect the wave glider and the underwater three-dimensional acoustic three-dimensional array, so that the underwater three-dimensional acoustic three-dimensional array is kept away from the sea surface and the wave glider. The influence of small sea surface undulations on the acquisition of acoustic information forms a low-noise acoustic measurement system.

The underwater three-dimensional acoustic three-dimensional array of the present invention utilizes the acoustic pulses emitted by the acoustic beacon, combined with the longitude and latitude information obtained by the GPS of the wave glider, and can realize the precise positioning of the underwater three-dimensional acoustic three-dimensional array, so that the system can be used for sound in the ocean. Measurement of signal positioning.

Description of drawings:

Figure 1 is a schematic diagram of the composition of the system; among them, 1 wave glider, 2 fixed depth towing cable, 3 underwater three-dimensional acoustic array, 4 solar panel, 5 satellite communication unit and GPS, 6 acoustic beacon, 8 telescopic vibration damping mechanism ;

Figure 2 is a schematic diagram of the composition of the depth-fixing cable and the underwater three-dimensional acoustic stereo array; wherein, 2 depth-fixing towing cables, 7 heavy blocks, 8 telescopic vibration damping mechanisms, 9 underwater drag bodies, 10 wings, 11 hydrophones, 12 Acoustic data acquisition and transmission modules.

Detailed ways

Embodiment 1: The embodiments of the present invention will be described in detail with reference to FIG. 1 to FIG. 2 ,

The embodiment of the present invention is a wave glider-based ocean acoustic information acquisition system for fixed depth, including a surface wave glider 1 , a fixed depth towing cable 2 , a telescopic vibration damping mechanism 8 and an underwater three-dimensional acoustic stereo array 3 ;

The wave glider is provided with a satellite communication unit and GPS 5, which are respectively used for communication with satellites and positioning of the wave glider;

The underwater three-dimensional acoustic stereo array 3 includes an underwater drag body 9, a wing plate 10, a hydrophone 11 and an acoustic data acquisition and transmission module 12; the hydrophone 11 is arranged on the wing plate 10 of the underwater drag body 9, and the acoustic data The acquisition and transmission module 12 is arranged on the underwater drag body 9; the hydrophone converts the acoustic signal into an electrical signal; the acoustic data acquisition and transmission module filters, collects and stores the electrical signal;

The fixed-depth towing cable is provided with a weight 7, which stabilizes the underwater acoustic tow body at a preset underwater depth; one end of the fixed-depth towing cable is also provided with a telescopic vibration damping mechanism 8, and the fixed-depth towing cable passes through the vibration reduction mechanism 8 Connected to the underwater tow body 9; the wave glider is located on the water surface, and the underwater tow body is connected to the wave glider through a fixed-depth towing cable and a telescopic vibration damping mechanism 8. When the wave glider sails in a predetermined direction, it drags the underwater three-dimensional acoustic stereo array. Sailing together; during the sailing process, the underwater three-dimensional acoustic stereo array has always obtained the acoustic information on the route; the fixed-depth towing cable is the carrier of power supply and communication for the wave glider to the underwater acoustic tow body;

The wave glider is provided with a solar panel 4, and the solar panel supplies power to the components of the wave glider and the underwater three-dimensional acoustic array;

The wave glider is also provided with an acoustic beacon 6. The acoustic beacon 6 regularly sends positioning acoustic pulses to the underwater three-dimensional acoustic stereo array, and the data acquisition and transmission module in the underwater three-dimensional acoustic stereo array receives the acoustic pulse signal, and solves the underwater acoustic pulse signal. The position of the three-dimensional acoustic stereo array relative to the wave glider is combined with the longitude and latitude information obtained by the GPS on the wave glider to calculate the accurate longitude and latitude information of the underwater three-dimensional acoustic stereo array.

The hydrophone converts the acoustic signals in the ocean into electrical signals, and the acoustic data acquisition and transmission module collects and filters the signals, and stores the accurate latitude and longitude information of the underwater three-dimensional acoustic stereo array in the internal memory synchronously. The received marine acoustic signals (including marine biological acoustic signals) and the azimuth, frequency and other parameters of the ship's acoustic signals are uploaded to the satellite communication unit in the wave glider.

The marine acoustic information obtained by the present invention is combined with the accurate longitude and latitude information of the underwater three-dimensional acoustic stereo array by synchronous self-capacity storage, and important marine acoustic signals can be transmitted back to the shore-based data center in real time through the satellite communication unit.

There is no battery in the underwater 3D acoustic stereo array, so its volume can be reduced. The power supply of the underwater 3D acoustic stereo array is powered by the solar panels of the wave glider.

The underwater tow body is the installation platform of the acoustic data acquisition and transmission module. The underwater three-dimensional acoustic stereo array achieves near neutral buoyancy by adjusting the weight and buoyancy, that is, the overall configuration is neutral buoyancy, which is stable at a certain depth underwater. The telescopic vibration damping mechanism achieves near neutral buoyancy by adjusting the number of floats and sinkers, reducing the weight load of the wave glider. The underwater drag body of the underwater three-dimensional acoustic array is designed with a slender streamlined revolving body, and the hydrophone is equipped with a diversion cover to reduce the flow resistance. The underwater three-dimensional acoustic array is less than the drag force of the wave glider. Drag to move in a predetermined path. The wave glider towed the underwater three-dimensional acoustic stereo array by the fixed-depth towing cable to obtain the three-dimensional information of the ocean sound field at the specified depth according to the predetermined route, and the marine acoustic information obtained on the route can be self-contained in the underwater three-dimensional acoustic array. The parameters are returned in real time by the wave glider.

The invention provides a depth-determined ocean acoustic information acquisition system based on a wave glider, the system can acquire ocean acoustic information in a large range and at a fixed depth according to a predetermined route in the ocean, and the system can acquire three-dimensional sound field information in the ocean sound field, The system can work at sea for a long time and obtain marine environmental information. The system can accurately determine the position of the underwater acoustic towed body. The original data of the marine acoustic information obtained by the system is stored in a self-contained manner, and important parameters are transmitted back through satellites. The use and workflow of the system of the present invention are as follows:

The marine acoustic information acquisition system based on the wave glider is deployed by the scientific research vessel in the designated sea area, and the system is self-inspected by the existing deck unit before deployment. After the self-check is normal, the system is put into the sea area where the sea depth is greater than the working depth of the underwater three-dimensional acoustic array. The existing shore-based control center sets the navigation route for the system, the system navigates according to the designated route, and the navigation of the wave glider drives the navigation of the underwater three-dimensional acoustic stereo array. The hydrophone of the underwater three-dimensional acoustic stereo array obtains the marine acoustic information, and the marine acoustic information on the route is stored in the internal memory. Critical acoustic information acquired during the voyage is transmitted back to the shore-based control center via satellite communications.

The underwater three-dimensional acoustic stereo array works continuously and can obtain marine acoustic information on the entire route. During the acquisition of marine acoustic information, the power supply of the underwater acoustic drag body is powered by the combination of solar panels and batteries of the wave glider, which can work at sea for a long time. The acoustic beacon of the surface wave glider transmits sound pulses, which are received by the underwater three-dimensional acoustic stereo array, and the position of the underwater three-dimensional acoustic stereo array relative to the surface wave glider is calculated. At the same time, the GPS position information of the wave glider can be obtained to calculate the underwater acoustic The true position of the drag body. After the acquisition of marine acoustic information is completed, the system is recovered by the scientific research vessel, and the staff downloads the acquired marine acoustic information.

It should be noted that the specific embodiments are only explanations and descriptions of the technical solutions of the present invention, and cannot be used to limit the protection scope of the rights. Any changes made according to the claims and description of the present invention are only partial changes, which should still fall within the protection scope of the present invention.

Claims (6)

1. a depth-fixed ocean acoustic information acquisition system based on a wave glider, is characterized in that, comprises a surface wave glider, a fixed-depth towing cable, a telescopic vibration damping mechanism and an underwater three-dimensional acoustic stereo array; The wave glider is provided with a satellite communication unit and GPS, which are respectively used for communication with satellites and positioning of the wave glider; The underwater three-dimensional acoustic array includes an underwater towed body, a wing plate, a hydrophone and an acoustic data acquisition and transmission module; the hydrophone is set on the wing plate of the underwater towed body, and the acoustic data acquisition and transmission module is set in the underwater drag on the body; There is a weight on the fixed-depth towing cable, and one end of the fixed-depth towing cable is also provided with a telescopic vibration damping mechanism. The fixed-depth towing cable is connected to the underwater tow body through the vibration reduction mechanism; the wave glider is located on the water surface, and the underwater tow body passes through the fixed-depth tow body. The towing cable and the telescopic vibration damping mechanism are connected to the wave glider; the fixed-depth towing cable is the carrier for the wave glider to communicate with the underwater acoustic tow body; An acoustic beacon is installed on the wave glider, and the acoustic beacon sends positioning acoustic pulses to the underwater three-dimensional acoustic stereo array at regular intervals. The data acquisition and transmission module in the underwater three-dimensional acoustic stereo array receives the acoustic pulse signal and solves the underwater three-dimensional acoustic stereo The position of the array relative to the wave glider, combined with the longitude and latitude information obtained by the GPS on the wave glider, the accurate longitude and latitude information of the underwater three-dimensional acoustic stereo array is calculated; The hydrophone converts the acoustic signals in the ocean into electrical signals, and the acoustic data acquisition and transmission module collects and filters the signals, and stores the accurate latitude and longitude information of the underwater three-dimensional acoustic stereo array in the internal memory synchronously. The azimuth and frequency parameters of the received marine acoustic signals and ship acoustic signals are uploaded to the satellite communication unit in the wave glider. 2. A wave glider-based ocean acoustic information acquisition system for fixed depth according to claim 1, characterized in that, the acoustic data acquisition and transmission module performs signal acquisition and filtering, combined with an underwater three-dimensional acoustic stereo array The accurate longitude and latitude information is synchronously stored in the internal memory using synchronous self-capacity storage. 3. A wave glider-based ocean acoustic information acquisition system for fixed depth according to claim 1 or 2, wherein the wave glider is further provided with a solar panel, and the solar panel supplies power to the components of the wave glider . 4. A system for acquiring depth-determined ocean acoustic information based on a wave glider according to claim 3, wherein a battery is not provided in the underwater three-dimensional acoustic stereo array, and a wave glider is used for the power supply of the underwater three-dimensional acoustic stereo array. The fixed-depth towing cable is the carrier for the wave glider to supply power to the underwater acoustic tow body. 5. A wave glider-based ocean acoustic information acquisition system for fixed depth according to claim 4, characterized in that, the underwater three-dimensional acoustic stereo array balances weight and buoyancy through a weight expansion and vibration damping mechanism, and the overall configuration It is neutrally buoyant and stable at a certain depth underwater. 6 . The depth-determined ocean acoustic information acquisition system based on a wave glider according to claim 5 , wherein the underwater drag body of the underwater three-dimensional acoustic array adopts a slender streamlined revolving body design, and the water The earpiece is equipped with a shroud, and the shroud is designed to reduce flow resistance.

Images