CN116800350A - Ice-crossing sound communication system and method - Google Patents
Ice-crossing sound communication system and method Download PDFInfo
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- CN116800350A CN116800350A CN202310717426.8A CN202310717426A CN116800350A CN 116800350 A CN116800350 A CN 116800350A CN 202310717426 A CN202310717426 A CN 202310717426A CN 116800350 A CN116800350 A CN 116800350A
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- 230000006854 communication Effects 0.000 title claims abstract description 150
- 238000004891 communication Methods 0.000 title claims abstract description 150
- 238000000034 method Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000012545 processing Methods 0.000 claims description 61
- 230000005284 excitation Effects 0.000 claims description 12
- 238000001615 p wave Methods 0.000 claims description 4
- 230000000644 propagated effect Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000006855 networking Effects 0.000 claims description 3
- 230000001902 propagating effect Effects 0.000 claims description 3
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- 230000004888 barrier function Effects 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 238000007667 floating Methods 0.000 abstract description 2
- 230000005236 sound signal Effects 0.000 abstract description 2
- 239000005457 ice water Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007175 bidirectional communication Effects 0.000 description 1
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- 238000009792 diffusion process Methods 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
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Abstract
The invention aims to provide a system and a method for ice-crossing communication, comprising an ice communication device and an underwater communication device. Based on the floating ice sound propagation characteristic, the invention simultaneously uses the ice layer sound propagation channel and the water sound propagation channel, and carries out information transmission from ice surface to water by exciting longitudinal waves between ice plates, thereby solving the problem that downlink long-distance communication cannot be realized because the attenuation of direct waves in water is faster when an ice surface seismic source is excited, and realizing the effective transmission and reception of the ice medium-crossing sound signals, and further completing the ice medium-crossing sound communication. The uplink communication and the downlink communication use different frequency bands for communication, namely, the ice communication device can simultaneously transmit signals of the ice layer acoustic propagation channel and receive signals of the underwater acoustic propagation channel, so that full duplex communication is realized, and the communication efficiency is improved. Meanwhile, three-component data received on the ice surface are analyzed and processed, and the receiving module in water can receive the three-component data in a directional manner, so that interference of a transmitting signal and noise can be effectively reduced, and the quality of a receiving signal is improved.
Description
Technical Field
The invention relates to a polar region communication system and a polar region communication method, in particular to a cross-ice sound communication system and a cross-ice sound communication method.
Background
Arctic regions are known as globally unique "white seas" because they are covered by sea ice throughout the year. Sea ice is also the biggest impediment to polar resource development and utilization as a regulator of global climate. The method is characterized by establishing polar three-dimensional information acquisition and transmission capability, and the core challenges corresponding to the polar three-dimensional information acquisition and transmission capability are precisely the problems that the transmission link of the ice-crossing medium information is blocked and the polar ocean information acquisition is limited caused by sea ice.
The communication method generally adopts electromagnetic waves as a carrier, and the electromagnetic waves are not applicable under the environment of ice water in the north pole due to the influence of ice water absorption; for the acoustic communication method commonly used in the marine environment, more acoustic communication methods are used under ice and water. For ice-crossing communications, it is common to drill through ice surfaces and erect cables through relay devices such as ice-based buoys, and transmit the cables to the ice surface on the basis of underwater communications. The method needs to break ice and erect cables, so that the cost burden, construction risk and application environment limitation are greatly increased. In addition, more ice-crossing communication is to collect direct wave signals in water under ice by using a geophone, and thereby, the uplink communication from water to ice in the ice-crossing medium communication is completed. The communication channel into which water is introduced by ice cannot be simply seen as the reversal of the communication channel into which water is introduced by ice due to the problem of energy transfer of the signal across the medium. The subsurface acoustic wave diffusion excited by the ice surface seismic source has fast attenuation and limited propagation distance, and the uplink communication path cannot realize downlink communication of the ice surface to the water. Conventional underwater acoustic transceiver communication equipment based on channel inversion is not suitable for bi-directional communication across ice media. The existing transmission of the cross-ice medium is only limited to the transmission of signals to the ice surface in the ice water, and no research is conducted on the downlink communication of the ice surface in the ice water.
Disclosure of Invention
The invention aims to provide a cross-ice acoustic communication system and a method capable of meeting the polar cross-ice layer communication interaction requirement.
The purpose of the invention is realized in the following way:
the invention relates to a cross-ice sound communication system, which is characterized in that: the ice communication device comprises an ice shell, an ice signal processing module, an ice acquisition module, an ice transmitting module, an ice power module and a satellite communication module, wherein the ice signal processing module, the ice acquisition module, the ice transmitting module, the ice power module and the satellite communication module are arranged in the ice shell; the ice acquisition module comprises three component detectors combined by three mutually orthogonal accelerometers, acquires external vibration information and transmits the acquired information to the ice signal processing module; the ice signal processing module analyzes and decodes the acquired information and simultaneously sends communication signals to the ice transmitting module and the satellite communication module; the ice surface transmitting module comprises a cylindrical vibrator which vibrates circumferentially, and the cylindrical vibrator propagates out in a circumferential vibration mode after receiving a communication signal of the ice surface signal processing module; and the satellite communication module is used for carrying out information communication with other ice sound communication systems or communication satellites in an electromagnetic wave mode after receiving the communication signals of the ice signal processing module.
The ice-sound-crossing communication system of the present invention may further include:
1. also included is an underwater communication device comprising: the underwater signal processing module is respectively connected with the underwater acquisition module, the underwater emission module and the underwater power supply module, and comprises a hydrophone with directivity, acquires underwater sound pressure information and transmits the acquired information to the underwater signal processing module; the underwater signal processing module analyzes and decodes the acquired information and simultaneously sends a communication signal to the underwater transmitting module; the underwater transmitting module comprises an omni-directional underwater sound transmitting transducer, and the underwater sound transmitting module transmits out the communication signals of the underwater signal processing module in the form of sound waves after receiving the communication signals.
2. The ice surface shell is internally provided with the heat preservation layer, so that the ice surface acquisition module, the ice surface signal processing module, the ice surface power module and the satellite communication module are insulated, the modules are prevented from being suspended or damaged due to low temperature, and the ice surface signal processing module controls and optimizes the whole system and comprises power supply time control of the ice surface emission module and the satellite communication module.
3. The aquatic casing is provided with the water barrier, carries out waterproof protection to aquatic collection module, aquatic emission module, aquatic signal processing module and aquatic power module, prevents that the module from because of intaking and suspending work or damaging.
The invention discloses a cross-ice sound communication method, which is characterized by comprising the following steps of: the method comprises the following steps of ice layer excitation and water receiving:
(1) Arranging an ice communication device on an ice surface, wherein an ice surface transmitting module and an ice surface collecting module are buried in an ice layer, and starting an ice surface power supply module after coupling and fixing;
(2) Transmitting a signal: the ice signal processing module uses the frequency band W 1 Modulation encoded communication information X 1 Obtaining the transmitted signal Sig 1 And transmit the signal Sig 1 Transmitting to an ice surface transmitting module, wherein the ice surface transmitting module adopts a circumferential vibration cylindrical vibrator excitation signal Sig 1 The circumferential vibration excites longitudinal waves between ice plates to propagate in the ice layers, when the acoustic waves propagate in the ice layers, energy continuously leaks into water and propagates in the water in a specific direction theta, and the theta is an included angle between the propagation direction and a normal line of a vertical ice surface;
(3) Receiving a signal: transmitted signal Sig propagating through ice layers 1 The wave beam is propagated in water at a fixed angle theta, is directly opposite to the ice surface by the receiving directivity, and is received by a hydrophone of the water acquisition module with the wave beam opening angle theta; wherein the angle theta and the longitudinal wave velocity c between the ice plates p Wave velocity c in water w In relation, θ is obtained by Snell's law;
(4) And (3) analyzing and processing the signals: signal Sig received by underwater collection module 1 Transmitting the signals to a signal processing module in water, and obtaining a communication signal X through decoding analysis 1 And (5) completing the downlink communication received in the water excited by the ice layer.
The ice-crossing sound communication method of the invention can also comprise the following steps:
1. the method also comprises the uplink communication method of water excitation and ice surface receiving:
a. transmitting a signal: the signal processing module in water uses frequency band W 2 Modulation encoded communication information X 2 Obtaining the transmitted signal Sig 2 And transmit the signal Sig 2 Transmitting to the underwater transmitting module, wherein the underwater transmitting module transmits a signal Sig by using the omni-directional underwater acoustic transducer 2 The sound wave will be omnidirectionally propagated in the water;
b. receiving a signal: acoustic wave signal Sig in water 2 The vibration is transmitted to the lower surface of the ice layer and is collected by a three-component accelerometer of the ice surface collection module through the vibration of the ice layer;
c. and (3) analyzing and processing the signals: the ice acquisition module acquires the received signal Sig 2 Transmitting the three-component information to an ice signal processing module, and obtaining a communication signal X by the ice signal processing module through noise reduction, decoding and analysis of the three-component information 2 Completing the water excitation and the uplink communication received by the ice surface;
d. and the antenna is used for transmitting signals to satellites or other communication devices, so that the networking communication function is realized.
The invention has the advantages that:
(1) Across ice layer acoustic communication: based on the floating ice sound propagation characteristics, an ice layer sound propagation channel (plate-to-plate longitudinal wave) and an underwater sound propagation channel (underwater direct wave) are simultaneously used, and the information transmission from ice surface to water is carried out by exciting the ice plate-to-plate longitudinal wave, so that the problem that the downlink long-distance communication cannot be realized due to the fact that the attenuation of the underwater direct wave is fast when an ice surface seismic source excites is solved, the effective transmission and the receiving of an ice medium-crossing sound signal are realized, and the ice medium-crossing sound communication is completed.
(2) Full duplex communication is realized, and communication efficiency is improved: the uplink communication (in water-ice surface) and the downlink communication (in ice surface-water) use different frequency bands for communication, namely, the ice surface communication device can simultaneously transmit signals of the ice layer acoustic propagation channel and receive signals of the underwater acoustic propagation channel, so that full duplex communication is realized, and the communication efficiency is improved. Meanwhile, three-component data received on ice are analyzed and processed, and the directional receiving of the underwater receiving module can effectively reduce the interference of transmitting signals and noise, improve the quality of receiving signals and ensure the effective implementation of duplex communication.
(3) The practicability is increased: the underwater communication device is general and can be installed on a submerged aircraft under ice; the ice communication device is simple in arrangement and operation, can realize communication with the water under the ice only by being vertically fixed on the ice, and simultaneously realizes ultra-long-distance cross-medium communication through satellite communication with a satellite communication module.
Drawings
FIG. 1 is a schematic diagram of an ice communication device;
FIG. 2 is a schematic diagram of an underwater communication device;
FIG. 3 is a flow chart of the method of the present invention;
fig. 4 is a communication schematic of the present invention.
Detailed Description
The invention is described in more detail below, by way of example, with reference to the accompanying drawings:
referring to fig. 1 to 4, an ice communication device of a cross-ice acoustic communication system according to the present invention includes: a shell 1, a receiving module 2, a transmitting module 3, a signal processing module 4, a power module 5 and a satellite communication module 6. The shell 1 is provided with a receiving module 2, a transmitting module 3, a signal processing module 4, a power module 5 and a satellite communication module 6; the signal processing module 4 is respectively and electrically connected with the receiving module 2, the transmitting module 3 and the satellite communication module 6, and the power supply module 5 supplies power for the other modules; the receiving module 2 is composed of three component detectors combined by three mutually orthogonal accelerometers and is used for collecting external vibration information and transmitting the obtained information to the signal processing module 4; the signal processing module 4 is used for analyzing and decoding the acquired information and sending communication signals to the transmitting module 3 and the satellite communication module 6; the transmitting module 3 is composed of a cylindrical vibrator which vibrates circumferentially, and is used for transmitting out in a circumferential vibration mode after receiving the communication signal of the signal processing module 4; the satellite communication module 6 is used for communicating information with other ice sound communication systems or communication satellites in the form of electromagnetic waves after receiving the communication signals of the signal processing module 4.
The shell 1 is also provided with an insulating layer for insulating the receiving module 2, the signal processing module 4, the power module 5 and the satellite communication module 6, and preventing the module from being suspended or damaged due to low temperature. The signal processing module 4 is not only used for decoding and analyzing the received signals, determining the transmitted signals, but also performing control optimization on the whole system, such as power supply time control on the transmitting module 3 and the satellite communication module 6.
Fig. 2 is a schematic diagram of an underwater communication device, the device comprising: a housing 7, a receiving module 8, a transmitting module 9, a signal processing module 10 and a power module 11. The shell 7 is provided with a water-resisting layer for performing waterproof protection on the receiving module 8, the transmitting module 9, the signal processing module 10 and the power module 11, and preventing the modules from suspending working or being damaged due to water inflow; the signal processing module 10 is respectively and electrically connected with the receiving module 8 and the transmitting module 9, and the power supply module 11 supplies power to the other modules; the receiving module 8 is composed of a hydrophone with directivity and is used for collecting the underwater sound pressure information and transmitting the acquired information to the signal processing module 10; the signal processing module 10 is used for analyzing and decoding the acquired information and sending a communication signal to the transmitting module 9; the transmitting module 9 is composed of an omni-directional underwater sound transmitting transducer and is used for transmitting out in the form of sound waves after receiving the communication signals of the signal processing module 10.
Fig. 3 is a communication procedure of an ice noise-crossing communication system according to the present invention:
according to the longitudinal wave velocity c between boards crossing the ice medium communication area p Wave velocity c in water w The directivity of the in-water receiving module 8 (receiving directivity facing the ice surface, opening angle θ) is set by determining θ from the following equation.
(1) The method for downlink communication of the water receiving by the excitation of the ice layer comprises the following steps:
1) The ice communication device is arranged on the ice, the transmitting module 3 and the receiving module 2 are buried in the ice layer, and after coupling and fixing, the power module 5 is started;
2) Transmitting a signal: the ice signal processing module 4 uses the frequency band W 1 Modulation encoded communication information X 1 Obtaining emissionsSignal Sig 1 And transmit the signal Sig 1 Is transmitted to the transmitting module 3, the ice surface transmitting module 3 adopts a circumferential vibration cylindrical vibrator excitation signal Sig 1 . The circumferential vibration is used for exciting longitudinal waves between ice plates to propagate in the ice layers, and when the acoustic waves propagate in the ice layers, energy can continuously leak into water and propagate in the water in a specific direction theta (theta is an included angle between the propagation direction and a normal line of the vertical ice surface);
3) And (3) signal receiving: transmitted signal Sig propagating through ice layers 1 Leaking into water at a fixed angle theta, and being received by a hydrophone of the underwater receiving module 8 with the opening angle theta, wherein the receiving directivity is opposite to the ice surface;
wherein the angle theta and the longitudinal wave velocity c between the ice plates p Wave velocity c in water w In relation, θ can be found by snell's law;
4) Signal analysis processing: the signal Sig received by the underwater receiving module 8 1 Transmitting to the signal processing module 10 in water, and obtaining the communication signal X through decoding and analysis 1 And (5) completing the downlink communication received in the water excited by the ice layer.
(2) The uplink communication method for water excitation and ice surface reception comprises the following steps:
1) Transmitting a signal: the signal processing module 10 in water uses the frequency band W 2 Modulation encoded communication information X 2 Obtaining the transmitted signal Sig 2 And transmit the signal Sig 2 Is transmitted to a transmitting module 9, and the underwater transmitting module 9 transmits a signal Sig by using an omni-directional underwater acoustic transducer 2 The sound wave will be omnidirectionally propagated in the water;
2) And (3) signal receiving: acoustic wave signal Sig in water 2 Propagates to the lower surface of the ice layer, is collected by the three-component accelerometer of the ice surface receiving module 2 through the vibration of the ice layer,
3) Signal analysis processing: the signal Sig received by the ice receiving module 2 2 Transmitting to an ice signal processing module 4, and obtaining a communication signal X through noise reduction, decoding and analysis of three-component information 2 And finishing the water excitation and the uplink communication received by the ice surface.
4) The satellite communication module 6 transmits signals to satellites or other communication devices through an antenna, and realizes a networking communication function.
Claims (6)
1. A cross-ice acoustic communication system, characterized by: the ice communication device comprises an ice shell, an ice signal processing module, an ice acquisition module, an ice transmitting module, an ice power module and a satellite communication module, wherein the ice signal processing module, the ice acquisition module, the ice transmitting module, the ice power module and the satellite communication module are arranged in the ice shell; the ice acquisition module comprises three component detectors combined by three mutually orthogonal accelerometers, acquires external vibration information and transmits the acquired information to the ice signal processing module; the ice signal processing module analyzes and decodes the acquired information and simultaneously sends communication signals to the ice transmitting module and the satellite communication module; the ice surface transmitting module comprises a cylindrical vibrator which vibrates circumferentially, and the cylindrical vibrator propagates out in a circumferential vibration mode after receiving a communication signal of the ice surface signal processing module; and the satellite communication module is used for carrying out information communication with other ice sound communication systems or communication satellites in an electromagnetic wave mode after receiving the communication signals of the ice signal processing module.
2. A cross-icing acoustic communications system according to claim 1 wherein: also included is an underwater communication device comprising: the underwater signal processing module is respectively connected with the underwater acquisition module, the underwater emission module and the underwater power supply module, and comprises a hydrophone with directivity, acquires underwater sound pressure information and transmits the acquired information to the underwater signal processing module; the underwater signal processing module analyzes and decodes the acquired information and simultaneously sends a communication signal to the underwater transmitting module; the underwater transmitting module comprises an omni-directional underwater sound transmitting transducer, and the underwater sound transmitting module transmits out the communication signals of the underwater signal processing module in the form of sound waves after receiving the communication signals.
3. A cross-icing acoustic communications system according to claim 1 wherein: the ice surface shell is internally provided with the heat preservation layer, so that the ice surface acquisition module, the ice surface signal processing module, the ice surface power module and the satellite communication module are insulated, the modules are prevented from being suspended or damaged due to low temperature, and the ice surface signal processing module controls and optimizes the whole system and comprises power supply time control of the ice surface emission module and the satellite communication module.
4. A cross-icing acoustic communications system according to claim 1 wherein: the aquatic casing is provided with the water barrier, carries out waterproof protection to aquatic collection module, aquatic emission module, aquatic signal processing module and aquatic power module, prevents that the module from because of intaking and suspending work or damaging.
5. A cross-ice sound communication method is characterized in that: the method comprises the following steps of ice layer excitation and water receiving:
(1) Arranging an ice communication device on an ice surface, wherein an ice surface transmitting module and an ice surface collecting module are buried in an ice layer, and starting an ice surface power supply module after coupling and fixing;
(2) Transmitting a signal: the ice signal processing module uses the frequency band W 1 Modulation encoded communication information X 1 Obtaining the transmitted signal Sig 1 And transmit the signal Sig 1 Transmitting to an ice surface transmitting module, wherein the ice surface transmitting module adopts a circumferential vibration cylindrical vibrator excitation signal Sig 1 The circumferential vibration excites longitudinal waves between ice plates to propagate in the ice layers, when the acoustic waves propagate in the ice layers, energy continuously leaks into water and propagates in the water in a specific direction theta, and the theta is an included angle between the propagation direction and a normal line of a vertical ice surface;
(3) Receiving a signal: transmitted signal Sig propagating through ice layers 1 The underwater acquisition module propagates in water at a fixed angle theta, the received directivity is opposite to the ice surface, and the beam opening angle is thetaReceiving by a hydrophone; wherein the angle theta and the longitudinal wave velocity c between the ice plates p Wave velocity c in water w In relation, θ is obtained by Snell's law;
(4) And (3) analyzing and processing the signals: signal Sig received by underwater collection module 1 Transmitting the signals to a signal processing module in water, and obtaining a communication signal X through decoding analysis 1 And (5) completing the downlink communication received in the water excited by the ice layer.
6. The method for cross-icing acoustic communication according to claim 5, wherein: the method also comprises the uplink communication method of water excitation and ice surface receiving:
a. transmitting a signal: the signal processing module in water uses frequency band W 2 Modulation encoded communication information X 2 Obtaining the transmitted signal Sig 2 And transmit the signal Sig 2 Transmitting to the underwater transmitting module, wherein the underwater transmitting module transmits a signal Sig by using the omni-directional underwater acoustic transducer 2 The sound wave will be omnidirectionally propagated in the water;
b. receiving a signal: acoustic wave signal Sig in water 2 The vibration is transmitted to the lower surface of the ice layer and is collected by a three-component accelerometer of the ice surface collection module through the vibration of the ice layer;
c. and (3) analyzing and processing the signals: the ice acquisition module acquires the received signal Sig 2 Transmitting the three-component information to an ice signal processing module, and obtaining a communication signal X by the ice signal processing module through noise reduction, decoding and analysis of the three-component information 2 Completing the water excitation and the uplink communication received by the ice surface;
d. and the antenna is used for transmitting signals to satellites or other communication devices, so that the networking communication function is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310717426.8A CN116800350A (en) | 2023-06-16 | 2023-06-16 | Ice-crossing sound communication system and method |
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| CN202310717426.8A CN116800350A (en) | 2023-06-16 | 2023-06-16 | Ice-crossing sound communication system and method |
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