CN109462444B - Submarine earth sound communication device, system and installation method - Google Patents
Submarine earth sound communication device, system and installation method Download PDFInfo
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Abstract
The invention provides a submarine earth sound communication device, a submarine earth sound communication system and an installation method. The inside of the shell is provided with a cavity, the lower part of the shell is provided with a small hole, and the water pipe, the cavity and the small hole form a sealed passage. The signal generating unit is used for receiving a transmitting signal of the local communication platform, the signal generating unit knocks the shell, and the seabed bedrock in contact with the shell generates a vibration signal. The signal detection unit detects a vibration signal sent by the remote seabed bedrock and sends the vibration signal to the local communication platform. The local communication platform is connected with the signal generation unit and the signal detection unit through optical fiber cables. The energy storage unit supplies power for the signal generation unit and the signal detection unit. The submarine geophone communication system realizes communication at different positions of the seabed, and has the advantages of high safety, strong anti-interference performance, good confidentiality and the like.
Description
Technical Field
The invention relates to the technical field of submarine communication, in particular to a submarine geoacoustic communication device, a submarine geoacoustic communication system formed by the device and an installation method.
Background
The resolution point of future war is profound. Because deep Yuan is the place where the ultimate lethal weapon is hidden and the best place for attacking other countries and preserving oneself. However, because the water depth is too deep, the distance is far away, and the information transmission needs to be absolutely secret, the deep-brillouin communication is a technical problem to be broken through in the national defense research. The earth-sound communication is a new approach for future open sea safe communication, and is a new mode for solving deep-Brillouin long-distance communication.
It follows that, depending on the law of sound propagation through a medium, a communication system for earth-sound should be buried in the elastic zone of the sediment covering layer, even in close contact with the earth crust. However, the thickness of sediments in the sea bottom of south China sea and the like is dozens of meters to hundreds of meters. Therefore, how to rapidly excavate the sediment covering layer on the upper layer of the seabed through special technical equipment to enable the earth-sound communication sensing pile to be arranged on the hard crust rock mass of the seabed becomes one of important preconditions for realizing earth-sound communication, and the technical problem to be solved is also needed. The submarine geophone communication system becomes a new way for carrying out remote safe communication on the ocean bottom in the future, and has wide application and research and development prospects.
Through retrieval, the Chinese patent number: 201520062329.0, publication (publication) No.: CN 204532419U, name: the invention discloses a portable underground vibration communication device which mainly comprises a supporting pipe, a height-adjustable base, an oblique supporting column, an air cylinder, a book conveying pipe and the like. The main disadvantages of the invention are that: 1. the structural design of the invention is installed and used in the complex environment at the bottom of the ocean; 2. the invention can not realize the encryption transmission and sending of information; 3. the vibration generating source of the invention needs manual operation and is not suitable for submarine scenes.
Chinese patent No.: 201520636937.8, publication (publication) No.: CN 204875660U, name: a shallow sea underwater communication device comprises a buoy, a universal joint, a first signal coupler, a second signal coupler, a clamp, a steel wire rope, a single-core steel wire, a first submarine cable, a second submarine cable, a water sensor/detector, a submarine anchor and the like. The main disadvantages of the invention are that: 1. the underwater device can be installed only in shallow sea and is not suitable for deep sea environment. 2. The underwater communication of the communication mainly depends on the generated ultrasonic waves to realize the sending and receiving in the medium water, but the water surface forwarding data of the underwater communication needs to be communicated through electromagnetic waves, so the underwater communication is easy to attack or interfere, and the signal concealment is poor. 3. The shallow sea is obviously influenced by the phenomena of human activity interference, tides in natural environment and the like, and the working effect of the shallow sea is also easily influenced.
Furthermore, chinese patent No.: 201280036313.1, publication (publication) No.: CN 103688021a, name: a subsea communication system having a subsea power distribution module adapted to be connected to a topside power supply of a topside installation and to distribute electrical power received from the topside power supply to the subsea module. A first communication connection to the subsea power distribution module is adapted to provide data communication with the topside installation. A second communication connection between the subsea power distribution module and the subsea module is provided, the subsea power distribution module being capable of forwarding data communications received over the first communication connection to the subsea block via the second communication connection. The main disadvantages of the invention are that: 1. the communication mode of the submarine communication system is mainly realized by communication cables, and long-distance communication is difficult to realize. 2. Communication equipment is relatively complicated, and needs to be used with the workstation cooperation of surface of water platform, and the disguise is relatively poor.
Disclosure of Invention
The invention provides a submarine geoacoustic communication device, a submarine geoacoustic communication system formed by the device and an installation method, aiming at the defects in the prior art.
According to a first object of the present invention, there is provided a subsea acoustic communication device, the device comprising:
the inner part of the shell is provided with a cavity, and the lower part of the shell is provided with a small hole;
the water pipe extends into the shell from the top of the shell and is communicated with the cavity, and the water pipe, the cavity and the small hole form a sealed passage;
the signal generating unit is arranged in the shell and used for receiving a transmitting signal of the local communication platform, and the signal generating unit enables the seabed bedrock in contact with the shell to generate a vibration signal through knocking the shell, and the vibration signal is spread outwards through the bedrock, so that the signal is transmitted;
the signal detection unit is arranged in the shell and used for detecting a vibration signal sent by the remote seabed bedrock and sending the vibration signal to the local communication platform to finish the acquisition and sending of the detection signal;
the local communication platform is fixed on the seabed, sends a working instruction to the signal generating unit to control the knocking work of the signal generating unit, receives a signal transmitted by the signal detecting unit and transmits the signal to a specified main body;
and the energy storage unit is arranged in the shell, is connected with the signal generation unit and the signal detection unit and supplies power to the signal generation unit and the signal detection unit.
Preferably, the submarine geoacoustic communication device has one or more of the following characteristics:
-after receiving a working instruction of the local communication platform, the signal generation unit knocks the shell by the amplitude and frequency of a certain password, wherein the amplitude and frequency of the knocking imply information content to be sent;
the local communication platform carries out coding and encryption processing or information decryption processing on the detected vibration signal and then transmits the processed vibration signal to a designated main body;
the local communication platform sends the work instruction to the signal generation unit after compiling and encrypting the work instruction to the signal generation unit.
Preferably, the local communication platform includes a short-distance signal receiver, a signal generation instruction control unit, and a signal compiling and processing unit, wherein:
when a submarine or an ROV approaches, the close-range signal receiver receives instruction information of the submarine or the ROV and transmits the instruction information to the signal compiling and processing unit;
the signal compiling and processing unit carries out compiling and encrypting processing according to the detection information to form an instruction signal of a generated signal and transmits the instruction signal to the signal generation instruction control unit;
the signal sounding instruction control unit sends a working instruction to the signal generating unit after receiving an instruction signal for generating a signal, and the signal generating unit knocks the shell;
and after the signal detection unit receives the signal, the received signal is sent to the signal compiling and processing unit for filtering, decoding and amplifying, and then sent to the appointed receiving main body.
More preferably, the local communication platform further comprises a charging interface of the vibration unit frequency adjusting unit and/or the energy storage unit, wherein:
a vibration unit is arranged in the cavity, the vibration unit frequency adjusting unit is used for enabling the vibration unit to work according to the specified amplitude and frequency, and the system is installed to the specified position of the seabed by matching with the high-pressure jet formed at the bottom of the shell;
when the electric quantity of the energy storage unit is insufficient, the energy storage unit is charged through the charging interface of the energy storage unit.
More preferably, the local communication platform further comprises a floating body material, wherein the floating body material is a light material with density less than that of the water body and provides buoyancy for the local communication platform.
Preferably, one end of the local communication platform is connected with an anchoring unit and fixed on the seabed through the anchoring unit, the anchoring unit comprises a torpedo anchor and a flexible anchor chain, the torpedo anchor is connected with the flexible anchor chain, and the local communication platform is fixed on the seabed through the torpedo anchor.
Preferably, the external high pressure plunger pump of water pipe, the high pressure plunger pump passes through the water pipe is impressed high-speed rivers the shell is inside in the cavity, through the shell lower part the aperture is sprayed away, follows the high-pressure rivers that the aperture jetted out can strike and fluidize the seabed silt of shell bottom makes seabed ground sound communication device sink.
Preferably, the water pipe sequentially passes through the signal generating unit, the signal detecting unit and the energy storage unit from top to bottom and is communicated with the cavity, or the water pipe sequentially passes through the signal detecting unit, the signal generating unit and the energy storage unit from top to bottom and is communicated with the cavity.
Preferably, the device also has one or more of the following features:
a vibration unit is arranged in the cavity, the vibration unit is fixed on the shell, the vibration unit is electrically connected with the energy storage unit, and the vibration unit is connected with the local communication platform through a cable;
-the lower part of the housing is conical; the cavity is located on the lower portion of the shell, the vibration unit is located in the cavity, and the signal generation unit, the signal detection unit and the energy storage unit are located above the vibration unit.
Preferably, the top surface of the energy storage unit is provided with an upper isolation plate, the bottom surface of the energy storage unit is provided with a lower isolation plate, and the edges of the upper isolation plate and the lower isolation plate are fixed on the shell.
According to a second object of the present invention, there is provided a submarine geophone communication system comprising a plurality of submarine geophones as described above, the plurality of submarine geophones being installed at different locations on the seabed at a distance, wherein:
the submarine geoacoustic communication device at the first position sends a working instruction to the signal generating unit at the first position after compiling and encrypting the working instruction when the local communication platform detects that a submarine or an ROV approaches, and the signal generating unit works and transmits vibration information to the submarine geoacoustic communication device at the second position;
a signal detection unit of the submarine geoacoustic communication device at the second position receives the information of the submarine geoacoustic communication device at the first position and sends the information to a local communication platform at the second position, and the local communication platform decrypts the information and sends the decrypted information to a receiving main body at the second position, so that the submarine or ROV invasion information at the first position is obtained;
the same applies to the transmission of information from the subsea acoustic communication device at the second location to the subsea acoustic communication device at the first location, thereby enabling secure transmission of multi-site information in this manner.
According to a third object of the present invention, there is also provided an installation method of the above-mentioned submarine geophone, comprising:
connecting one end of a water pipe on the shell with a high-pressure plunger pump, and starting the high-pressure plunger pump; the water pipe extends into the shell from the top of the shell and is communicated with the cavity, and the water pipe, the cavity and the small hole form a sealed passage;
the high-pressure water flow ejected from the small hole of the shell can impact and fluidize the sediment on the bottom of the shell, so that the submarine underwater acoustic communication system is driven to sink; when the shell sinks to a designated position, the high-pressure plunger pump is turned off;
or a vibration unit is further arranged below the shell, the vibration unit and the shell are fixed together, and the vibration frequency is adjusted through the outside, so that the fluidization of silt around the seabed system device is accelerated, and the device sinks to a specified foundation stratum at a higher speed.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the submarine geophone communication system is mainly suitable for the ocean deep-water submarine environment, and realizes communication at different positions of the seabed.
The communication mode of the submarine geophone communication system has the advantages of high safety, strong anti-interference performance, good confidentiality and the like, and provides a new means for the deep sea submarine communication in the fields of scientific research, military affairs and civil use.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
FIG. 1 is a schematic overall structure diagram of one embodiment of the present invention;
FIG. 2 is a schematic overall structure diagram of another embodiment of the present invention;
FIG. 3 is a schematic diagram of an embodiment of the present invention;
FIG. 4 is a schematic diagram of another subsea acoustic communication implementation of the present invention;
in the figure: 1. the device comprises a water pipe, 2, a signal generating unit, 3, a signal detecting unit, 4, a local communication platform, 5, a shell, 6, an upper isolation plate, 7, a lower isolation plate, 8, an energy storage unit, 9, a vibrating unit, 10 and an anchoring unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
All the drawings are only for convenience of explaining technical contents of the present invention. The numbers, positions of the components, interrelationships between the components, and dimensions of the components used to construct the preferred embodiment do not limit the technical solution itself, but extend to the entire area covered by the technical field.
The invention provides a submarine earth sound communication device which comprises a water pipe 1, a shell 5 and a local communication platform 4. The shell 5 is internally provided with a signal generating unit 2, a signal detecting unit 3 and an energy storage unit 8. Wherein, the inside of shell 5 is equipped with the cavity, and the lower part of shell 5 is opened has the aperture. The water pipe 1 extends into the shell 5 from the top of the shell 5 and is communicated with the cavity, and the water pipe 1, the cavity and the small hole form a sealed passage. Fig. 1 and 2 are schematic structural diagrams of two embodiments of the submarine geophone communication system according to the present invention.
The signal generating unit 2 is used for starting to work after receiving a signal transmitting command, knocking a specific part of the shell 5 at a certain frequency, wherein the part protrudes towards the inside of the shell 5 and is made of rigid body materials with high toughness, and the shell 5 is in direct contact with seabed bedrock, so that a vibration signal can be transmitted outwards through the bedrock, and the signal transmission is realized. The knocking frequency of the signal generating unit 2 mainly works according to the given instruction of the local communication platform 4, and the knocking frequency contains information content to be sent.
The signal detection unit 3 and the signal generation unit 2 are independent from each other and isolated by using shockproof materials, and the signal detection unit is used for detecting signals sent by a remote place through seabed bedrock and sending the signals to the local communication platform 4, so that the acquisition and the sending of detection signals are completed. The detection signal of the signal detection unit 3 mainly depends on a sensitive monitoring vibration sensor to detect the vibration signal of the bedrock, and the monitoring vibration sensor is in close contact with the shell 5 and can detect the vibration signal of the bedrock around the shell. As required, the monitoring vibration sensor module of the signal detection unit 3 may be maintained in a silent state while the signal generation unit 2 is operated to avoid unnecessary interference.
And the local communication platform 4 is fixed on the seabed, is connected with the signal generating unit 2 and the signal detecting unit 3 through optical fiber cables, and is used for receiving and processing signals transmitted by the signal generating unit 2 and the signal detecting unit 3. The local communication platform 4 mainly comprises a floating body material, a close-range signal receiver, a signal sounding instruction control unit, a signal compiling and processing unit, a vibration unit frequency adjusting unit, a charging interface of an energy storage unit and the like. When the submarine or the ROV approaches, the short-distance signal receiver senses instruction information sent by the submarine or the ROV, the information is compiled, encrypted and processed to be compiled into an instruction signal of a generated signal, the signal sounding instruction control unit sends a sounding instruction to the signal generating unit after receiving the instruction signal of the generated signal, and the signal generating unit 2 knocks the shell 5. When the signal detection unit 3 receives the signal, the received signal is sent to a signal compiling and processing unit on the local communication platform 4 for filtering, decoding and amplifying, and the received signal is sent to the surrounding submarines or ROVs. When the submarine geophone communication system is installed, the local communication platform 4 can start the vibration unit frequency adjusting unit to enable the vibration unit 9 to work, and the high-pressure jet flow formed at the bottom of the shell 5 is matched to install the system to a submarine designated position. When the electric quantity of the energy storage unit 8 is insufficient, an instruction can be sent to the local communication platform 4 to apply for energy supplement, and charging can be performed through a charging interface of the energy storage unit.
The system is used for enabling the signal generating unit to work according to the specified amplitude and frequency, and the system is installed to the specified position on the seabed by matching with the high-pressure jet formed at the bottom of the shell.
And the energy storage unit 8 is arranged in the shell 5, is connected with the signal generation unit 2 and the signal detection unit 3 and supplies power to the signal generation unit and the signal detection unit. And the energy storage unit 8 is used for continuously supplying energy to the signal generation unit 2 and the signal detection unit 3.
As shown in fig. 1 or fig. 2, as an embodiment of the present invention, a vibration unit 9 is disposed in the cavity, the vibration unit 9 is fixed on the housing 5, the vibration unit 9 is electrically connected to the energy storage unit 8, and the vibration unit 9 is connected to the local communication platform 4 through a cable. The vibration unit 9 is used for rapidly fluidizing the surrounding silt by utilizing high-frequency vibration during system installation, and is matched with high-speed jet flow to accelerate the system installation.
In some preferred embodiments, the energy storage unit 8 is connected to the local communication platform 4 via a cable, and when the internal energy of the energy storage unit 8 is too low, a charging operation can be performed through a charging interface of the local communication platform 4.
In some preferred embodiments, one end of the local communication platform 4 is connected to a mooring unit 10 and is fixed to the seabed by the mooring unit 10, the mooring unit 10 comprises a fish and flexible anchor chain, the fish and flexible anchor chain are connected, and the local communication platform 4 is fixed to the seabed by the fish.
In some preferred embodiments, the water pipe 1 is externally connected with a high-pressure plunger pump, and the high-pressure plunger pump presses high-speed water flow into a cavity inside the shell 5 through the water pipe 1. The water pipe 1 can be made of a high-pressure-resistant and explosion-proof polyurethane hose material, the other end of the water pipe 1 is connected with a high-pressure plunger pump on a water surface platform, when the submarine geoacoustic communication system is installed, the high-pressure plunger pump presses high-speed water flow into a cavity at the lower part of the shell 5 through the water pipe 1 and sprays the high-speed water flow out through a small hole at the lower part of the shell 5 to erode submarine silt, so that the silt structure is broken and fluidized, and the sinking speed of the submarine geoacoustic communication system is accelerated.
In some preferred embodiments, the lower portion of the housing 5 is tapered to facilitate the entrance of sediment from the sea floor, the cavity is located in the lower portion of the housing 5, the vibration unit 9 is located in the cavity, and the signal generation unit 2, the signal detection unit 3, and the energy storage unit 8 are located above the vibration unit.
The positions of the signal generating unit 2 and the signal detecting unit 3 are not limited to the upper and lower positions as shown in fig. 1 and 2, but a structure in which the signal detecting unit 3 is located above the signal generating unit 2 is preferable. Referring to fig. 2, the water pipe 1 is communicated with the cavity through the signal generating unit 2, the signal detecting unit 3 and the energy storing unit 8 from top to bottom in sequence, or, referring to fig. 1, the water pipe 1 is communicated with the cavity through the signal detecting unit 3, the signal generating unit 2 and the energy storing unit 8 from top to bottom in sequence.
In a preferred embodiment, the top surface of the energy storage unit 8 is provided with an upper isolation plate 6, the bottom surface of the energy storage unit is provided with a lower isolation plate 7, and the edges of the upper isolation plate 6 and the lower isolation plate 7 are fixed on the shell 5.
The upper isolation plate 6 is made of a high-strength material, and has the function of directly contacting the energy storage unit 8 and the unit (the signal detection unit 3 or the signal generation unit 2) on the upper portion of the energy storage unit, and the upper isolation plate can reduce the influence of the vibration of the signal detection unit 3 or the signal generation unit 2 on the energy storage unit 8. The lower isolation plate 7 is made of high-strength material, is combined with the shell and is subjected to sealing and waterproof treatment on the inlet of the water pipe 1 and the periphery of the cable of the vibration unit 9, and the function of the lower isolation plate is to provide a high-pressure cavity environment for the lower part of the shell 5 so as to form high-pressure jet flow at a lower nozzle.
In the above embodiment, the housing 5 is made of a high-strength, corrosion-resistant, and high-density rustproof rigid material, and functions to protect the signal generating unit 2, the signal detecting unit 3, the energy storage unit 8, and the vibration unit 9 inside. The high-pressure cavity formed at the bottom of the housing 5 can form high-pressure jet flow to accelerate the installation of the communication system.
The overall working process of the above embodiment is as follows: firstly, the housing 5 is installed to a designated position on the seabed, generally referred to as seabed bedrock, by using the impact force of high-pressure jet flow formed at the bottom of the housing 5 by the plunger pump through the water pipe 1 in combination with the vibration unit 9 inside the housing. While the local communication unit 4 is fixed to the bed by means of the mooring unit 10, and the installation of the equipment is completed. The signal detection unit 3 and the local communication platform 4 of the submarine geoacoustic communication system are started to work simultaneously, when a submarine or an ROV approaches to the water area, the local communication platform 4 of the ground receives instruction information of the submarine or the ROV (remote operated vehicle), the instruction information is sent to the signal generation unit 2 of the ground after being compiled and encrypted, the signal generation unit of the ground works, a shell is knocked, the information is sent to a far destination through vibration of bedrock, the signal detection unit 3 of the destination sends the signal to the local communication platform 4 after receiving the signal, and the local communication platform 4 decrypts the signal and sends the decrypted signal to other submarines or ROVs, so that communication between two places is realized. In the working process, the energy storage unit 8 continuously supplies power to the signal generation unit 2, the signal detection unit 3 and the vibration unit 9, and when the shell reaches a specified position, the vibration unit 9 stops working. The upper and lower baffles provide a closed cavity within the housing 5 which is advantageous for protecting the associated unit components and for forming a relatively closed cavity for generating a high pressure jet during installation.
The invention also provides a submarine geoacoustic communication system, comprising a plurality of submarine geoacoustic communication devices, which are arranged at different positions on the seabed at a certain distance, wherein:
when the local communication platform 4 detects that a submarine or an ROV approaches, the submarine or the ROV sends a working instruction to the signal generating unit 2 at the first position after being compiled and encrypted, and the signal generating unit 2 works and transmits vibration information to the submarine geoacoustic communication device at the second position;
the signal detection unit 3 of the submarine geoacoustic communication device at the second position receives the information of the submarine geoacoustic communication device at the first position and sends the information to the local communication platform 4 at the second position, and the local communication platform 4 decrypts the information and sends the decrypted information to the receiving main body at the second position, so that the submarine or ROV intrusion information at the first position is obtained;
the same applies to the transmission of information from the subsea acoustic communication device at the second location to the subsea acoustic communication device at the first location, thereby enabling secure transmission of multi-site information in this manner.
Of course, the above lists two embodiments of information transmission, and the information transmission in multiple places is also realized by referring to the above similar principle, which is not described herein again.
The invention also provides an embodiment of the installation method of the submarine underwater acoustic communication device in the embodiment, which comprises the following steps: (1) one end of a water pipe 1 on the shell 5 is connected with a high-pressure plunger pump, and the high-pressure plunger pump is started; the water pipe 1 extends into the shell 5 from the top of the shell 5 and is communicated with the cavity, and the water pipe 1, the cavity and the small hole form a sealed passage; (2) the high-pressure water flow ejected from the small hole of the shell 5 can impact and fluidize the seabed sediment at the bottom of the shell 5, so that the seabed underwater acoustic communication device is driven to sink; when the housing is lowered to a designated position, the high pressure plunger pump is turned off. Furthermore, a vibration unit can be arranged below the lower isolation plate 7 of the shell 5, the vibration unit and the shell 5 are fixed together, and the vibration frequency is adjusted through the outside, so that the fluidization of silt around the seabed system device is accelerated, and the device sinks to a specified foundation stratum at a higher speed.
Specifically, the submarine geophone communication system according to the above embodiment of the present invention has the following two embodiments when installed.
Specific installation mode 1: the installation of the submarine earth-sound communication system is mainly realized by means of high-pressure jet technology and high-frequency vibration fluidization promotion. The installation steps of the submarine geophone communication system are as follows: firstly, a sea-surface submarine geophone communication system installation ship is used for hoisting system equipment, one end of a water pipe 1 on a shell 5 is connected with a high-pressure plunger pump on the ship, a torpedo anchor in an anchoring unit 10 of a local communication platform 4 is penetrated and installed to a specified position, the shell 5 is descended to the seabed by using a ship lifting system, the high-pressure plunger pump and a vibration unit 9 in the shell 5 are started to place the shell 5, when the shell 5 sinks to the specified position, the vibration unit 9 stops working, the high-pressure plunger pump is turned off, the installation conditions of the local communication platform 4 and the shell 5 are checked, the local communication platform 4 and the shell 5 are ensured to reach the specified position, and after normal working test is carried out, the water pipe and the high-pressure plunger pump can be separated, and installation is completed.
The specific working mode 2 is as follows: as shown in fig. 3 or fig. 4, after the submarine geoacoustic communication system shells 5 of the a ground and the B ground are installed to the designated positions, the local communication platforms 4 of the two places are simultaneously fixed on the seabed by using the anchoring unit 10, the signal detection unit 3 and the local communication platform 4 of the submarine geoacoustic communication system are simultaneously started to work, when the submarine a is close to the water area, the local communication platform 4 of the a ground detects the submarine or ROV, and sends the instruction information of the detected submarine or ROV to the signal generation unit 2 of the a ground after being compiled and encrypted, the signal generation unit of the a ground works, the information of the submarine or ROV is sent to the B ground by knocking, the signal detection unit 3 of the B ground receives the signal of the a ground and sends the signal to the local communication platform 4 of the B ground, the local communication platform 4 decrypts the signal of the detected submarine or ROV and sends the decrypted signal to the submarine or ROV of the B ground, therefore, the submarine or the ROV in the area B can know the invasion information of the submarine or the ROV in the area A. Vice versa, the information is transmitted from B to A. Therefore, in this way, the secret transmission of the information of the two places A and B is realized, and a new way is provided for the long-distance safe communication at the bottom of the ocean.
The above description is of the preferred embodiment of the invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. In the case of conflict, the embodiments and features of the embodiments of the present application may be combined with each other in any desired manner and are included in the scope of the present invention.
Claims (11)
1. A subsea acoustic communication device, the device comprising:
the inner part of the shell is provided with a cavity, and the lower part of the shell is provided with a small hole;
the water pipe extends into the shell from the top of the shell and is communicated with the cavity, and the water pipe, the cavity and the small hole form a sealed passage;
the signal generating unit is arranged in the shell and used for receiving a transmitting signal of the local communication platform, and the signal generating unit enables the seabed bedrock in contact with the shell to generate a vibration signal through knocking the shell, and the vibration signal is spread outwards through the bedrock, so that the signal is transmitted;
the signal detection unit is arranged in the shell and used for detecting a vibration signal sent by a remote seabed bedrock and sending the vibration signal to the local communication platform to finish the acquisition and sending of a detection signal;
the local communication platform is fixed on the seabed, sends a working instruction to the signal generating unit to control the knocking work of the signal generating unit, receives a signal transmitted by the signal detecting unit and transmits the signal to a specified main body;
and the energy storage unit is arranged in the shell, is connected with the signal generation unit and the signal detection unit and supplies power to the signal generation unit and the signal detection unit.
2. Subsea acoustic communication device according to claim 1, characterised by one or more of the following features:
-after receiving a working instruction of the local communication platform, the signal generation unit knocks the shell by the amplitude and frequency of a certain password, wherein the amplitude and frequency of the knocking imply information content to be sent;
the local communication platform carries out coding and encryption processing or information decryption processing on the detected vibration signal and then transmits the processed vibration signal to a designated main body;
the local communication platform sends the work instruction to the signal generation unit after compiling and encrypting the work instruction to the signal generation unit.
3. The subsea acoustic communication device according to claim 2, wherein the local communication platform comprises a close-range signal receiver, a signal generation instruction control unit, and a signal compiling and processing unit, wherein:
when a submarine or an ROV approaches, the close-range signal receiver receives instruction information of the submarine or the ROV and transmits the instruction information to the signal compiling and processing unit;
the signal compiling and processing unit carries out compiling and encrypting processing according to the instruction information to form an instruction signal of a generated signal and transmits the instruction signal to the signal generation instruction control unit;
the signal sounding instruction control unit sends a working instruction to the signal generating unit after receiving an instruction signal for generating a signal, and the signal generating unit knocks the shell;
and after the signal detection unit receives the signal, the received signal is sent to the signal compiling and processing unit for filtering, decoding and amplifying, and then sent to the appointed receiving main body.
4. Subsea acoustic communication device according to claim 3, wherein the local communication platform further comprises a charging interface of the vibration unit frequency adjustment unit and/or the energy storage unit, wherein:
a vibration unit is arranged in the cavity, the vibration unit frequency adjusting unit is used for enabling the vibration unit to work according to the specified amplitude and frequency, and the system is installed to the specified position of the seabed by matching with the high-pressure jet formed at the bottom of the shell;
when the electric quantity of the energy storage unit is insufficient, the energy storage unit is charged through the charging interface of the energy storage unit.
5. The subsea acoustic communication device of claim 4, wherein the local communication platform further comprises a buoyant material that is a lightweight material having a density less than a body of water to provide buoyancy to the local communication platform.
6. Subsea acoustic communication device according to claim 1, characterised by one or more of the following features:
-the water pipe is externally connected with a high-pressure plunger pump, the high-pressure plunger pump presses high-speed water flow into the cavity inside the shell through the water pipe and sprays the high-speed water flow out through the small hole in the lower part of the shell, and the high-pressure water flow sprayed out from the small hole can impact and fluidize seabed sediment at the bottom of the shell to promote the seabed geophone communication device to sink;
the water pipe is communicated with the cavity through the signal generating unit, the signal detecting unit and the energy storage unit from top to bottom in sequence, or the water pipe is communicated with the cavity through the signal detecting unit, the signal generating unit and the energy storage unit from top to bottom in sequence.
7. Subsea acoustic communication device according to claim 1, characterised by one or more of the following features:
a vibration unit is arranged in the cavity, the vibration unit is fixed on the shell, the vibration unit is connected with the energy storage unit through a cable, and the vibration unit is connected with the local communication platform through a cable;
-the lower part of the housing is conical;
-the cavity is located in a lower part of the housing, the vibration unit is located in the cavity, and the signal generation unit, the signal detection unit and the energy storage unit are located above the vibration unit.
8. A subsea acoustic communication device as claimed in any of claims 1-7, wherein the top surface of the energy storage unit is provided with an upper insulation plate and the bottom surface of the energy storage unit is provided with a lower insulation plate, the edges of the upper and lower insulation plates being fixed to the housing.
9. A subsea acoustic communication system comprising a plurality of subsea acoustic communication devices according to any of claims 1-8, the plurality of subsea acoustic communication devices being mounted at different locations on the seafloor and spaced apart, wherein:
the submarine geoacoustic communication device at the first position sends a working instruction to the signal generating unit at the first position after compiling and encrypting the working instruction when the local communication platform detects that a submarine or an ROV approaches, and the signal generating unit works and transmits vibration information to the submarine geoacoustic communication device at the second position;
a signal detection unit of the submarine geoacoustic communication device at the second position receives the information of the submarine geoacoustic communication device at the first position and sends the information to a local communication platform at the second position, and the local communication platform decrypts the information and sends the decrypted information to a receiving main body at the second position, so that the submarine or ROV invasion information at the first position is obtained;
the same applies to the transmission of information from the subsea acoustic communication device at the second location to the subsea acoustic communication device at the first location, thereby enabling secure transmission of multi-site information in this manner.
10. A method of installing a subsea acoustic communication device as claimed in any of claims 1-8, comprising:
connecting one end of a water pipe on the shell with a high-pressure plunger pump, and starting the high-pressure plunger pump; the water pipe extends into the shell from the top of the shell and is communicated with the cavity, and the water pipe, the cavity and the small hole form a sealed passage;
the high-pressure water flow ejected from the small hole of the shell can impact and fluidize the seabed sediment at the bottom of the shell, so that the seabed underwater acoustic communication system is driven to sink; when the housing is lowered to a designated position, the high pressure plunger pump is turned off.
11. The method of installing a subsea acoustic communication device of claim 10, wherein a vibration unit is disposed below the housing, the vibration unit and the housing being secured together to allow the device to sink to a given stratum of the foundation at a faster rate by adjusting the frequency of vibration to thereby accelerate the fluidization of silt around the subsea system device.
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| WO2007072066A1 (en) * | 2005-12-23 | 2007-06-28 | Wireless Fibre Systems Ltd | Transmission of underwater electromagnetic radiation through the seabed |
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| CN107202632A (en) * | 2017-06-09 | 2017-09-26 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Vector sensor unit for underwater surveillance net |
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| GB2472428A (en) * | 2009-08-06 | 2011-02-09 | Wireless Fibre Systems Ltd | Wireless communication via seabed for underwater seismic detection network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007072066A1 (en) * | 2005-12-23 | 2007-06-28 | Wireless Fibre Systems Ltd | Transmission of underwater electromagnetic radiation through the seabed |
| CN101383663A (en) * | 2008-10-23 | 2009-03-11 | 山东科技大学 | Ground through communication system |
| CN107202632A (en) * | 2017-06-09 | 2017-09-26 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Vector sensor unit for underwater surveillance net |
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