CN109586807A - Sky-water means of communication and device - Google Patents
Sky-water means of communication and device Download PDFInfo
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- CN109586807A CN109586807A CN201811327819.3A CN201811327819A CN109586807A CN 109586807 A CN109586807 A CN 109586807A CN 201811327819 A CN201811327819 A CN 201811327819A CN 109586807 A CN109586807 A CN 109586807A
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- water
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- laser beam
- communication
- water surface
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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
Abstract
It is a kind of airborne or UAV system, realize the method and device of the both-way communication between submarine target in the air.This method, to the water surface, generates acoustic signals in water surface shallow-layer, which carries corresponding communication information, can be received by Underwater Target Detection using the transmission radiating laser beams for the specific optical maser wavelength for carrying associated communication information.Submarine target emits communication acoustic signals to the water surface, generates corresponding acoustic vibration in the water surface, obtains relevant information through the detection of airborne exploring laser light beam, realizes sky-water both-way communication.
Description
Technical field
With the method and device of realization of goal both-way communication in airborne device and water.Transmission including being modulated with communication information
The generation of laser beam sends laser beam in water surface shallow-layer and generates sound wave, and sound wave is by Underwater Target Detection and obtains communication information, water
Lower target sends the sound wave for being loaded with communication information to the water surface, and the acoustic vibration of water surface is examined by another airborne exploring laser light beam
It surveys, and obtains associated communication information, realize the both-way communication between sky-water.
Background technique
The both-way communication between submarine target is realized in the sky, is always that a pole needs to solve, however it is again highly difficult
Technical problem.Its key difficulties is that the decaying that water involves light wave to electromagnetism is very big, it is difficult to be carried out in water with electromagnetic wave or light
Communication.
However, it is always relatively real for carrying out the communication between submarine target with sound wave since water is the excellent transmission medium of sound
With with effective underwater communication method.But the angle of divergence of sound wave transmitting is big, and sound can be from air toward water transmission, or from water
Propagating into air can directly can not all be realized from aerial using sound wave with underwater mesh in practice by strong reflection and decaying
Two-way communication between mark.
For many years, a large amount of R&D works have been made to carrying out undersea detection/communication with laser.Water is very serious to the decaying of light,
Only there are preferable transmitance, i.e., transmission window of the so-called water to light in bluish-green spectral range.However, even if using bluish-green laser
In the case where, for preferable water quality, laser under water detection/communication distance also only in tens meters of magnitude.For different water
The visibility variation of matter, water is very big.Simultaneously in the case where surface motions situation is complex, the water surface is to direction of beam propagation
Deflecting influence, disperse and attenuation effect are both serious and it is difficult to predict from the air using laser to the validity communicated under water
Therefore it will further be restricted.
How to realize and between the technological break-through of the both-way communication submarine target and realize functionization in the air, is that a pole needs to solve
Challenge.
Summary of the invention
Key of the present invention is when being irradiated on the water surface using laser beam, and fraction of laser light beam energy is absorbed in water surface shallow-layer
And laser-induced sound effect is generated, generate sound wave.Especially when the wavelength of the laser beam is the 3 mum laser wavelength such as 2 microns, it
Be placed exactly on the strong absorption peak of water, laser-induced sound effect efficiency with higher.Once laser beam itself is modulated with logical
Information is interrogated, if the intensity of laser beam is modulated or laser beam sheet is as the coded pulse for representing communication information, then laser-induced sound
The sound wave of generation equally carries relevant communication information.Since water is the good transmission medium of sound wave, which can be in water
In have a relatively satisfactory propagation distance, the communication target acquisition of You Shuizhong obtains communication information.
Meanwhile submarine target can emit the water surface communication sound wave, such as the sound that coded pulse sound wave or intensity are modulated
Wave.The sound wave reaches the water surface, generates corresponding water surface vibration in the water surface.Utilize laser beam, such as frequency stabilization or single-frequency laser beam pair
Water surface vibration is detected, and the frequency of the laser beam of reflection is by water surface vibration modulation, i.e., so-called " Doppler effect ".Reflection
Laser beam is received and is demodulated by aerial platform, acquires communication information.Water surface wave is moved relative to communication information, frequency
It is much lower, it can readily be rejected from effective information.The both-way communication being achieved between sky-water.
Relevant device includes the communication information transmission beam laser for being installed on aerial platform, sends laser beam
Optical transmitting system detects Frequency Stabilized Lasers beam laser and its transmitting/receiving optics, receives demodulator.It is installed on underwater
The device of target platform is similar with more conventional underwater sound wave communication device, but modulates and demodulation may be different.
The means of communication and device provide a kind of from carrying out continual both-way communication between submarine target in the air
Method and apparatus.Device is installed on aerial someone or unmanned aerial vehicle platform and submarine target, has been avoided with laser directly in water
Laser is decayed serious key difficulties in water when lower communication, and having played laser in the sky has excellent direction propagation characteristic and sound
Wave has the compound advantage of excellent propagation characteristic in water, by laser in water surface shallow-layer cause sound, maximizes favourable factors and minimizes unfavourable ones, and breaks through laser or sound
The limitation that wave is used alone, should there is good application prospect.When needing, someone or unmanned aerial vehicle platform can also by communication information into
One step is forwarded to other long distances control maneuvering platform with other conventional communications methods.
Detailed description of the invention
The schematic diagram of both-way communication is carried out between Fig. 1 submarine target with sound wave
Fig. 2 airborne device from the air with submarine target carry out both-way communication method schematic diagram
Specific embodiment
The conventional underwater sound wave means of communication are as shown in Figure 1.Underwater platform can be various sub-aqua sports or fixed target
Or platform.01 is water surface in Fig. 1, and 02 is water body.05 is underwater fixed platform.06 is from fixed platform 05 to motion platform 10
The communication sound wave of sending obtains communication information after 10 receive.Motion platform equally can issue communication sound to fixed platform 05
Wave is received by fixed platform 05 and is obtained communication information, to realize the both-way communication between two platforms.
But since sound wave is under water to air-launched, or from the air to underwater emission when, all can be in the water surface by very big
Decaying directly realizes that there are few realistic possibilities for the both-way communication between submarine target in the air using sound wave.
Fig. 2 is the schematic diagram that the present invention realizes the both-way communication between submarine target in the sky.Wherein 11 be the water surface, 12
For water body.15 be aerial platform, it, which can be, various has man-machine or various unmanned planes.Emitted from aerial platform 15 to the water surface 11
It is loaded with the transmission laser beam 16 of communication information.After sending the laser beam arrival water surface 11, portion of energy is absorbed by water surface shallow-layer, according to
The design parameter of laser beam such as wavelength, beam diameter, laser beam modulation or coded pulse shape and width, pulse energy etc. can
It is expanded with being heated by laser, laser vaporization vacuole, the difference mechanism such as laser breakdown generates strong in the shallow-layer of approximately level
Sound wave 17, i.e., so-called laser-induced sound effect.
There can be higher sound wave function that is, for certain laser power intensity to obtain more effective laser-induced sound effect
Rate generates, and the wavelength of laser beam should be preferably the wavelength that can be absorbed strongly by water, such as have the optical fiber laser for mixing thulium, transmitting
A length of 1.9 microns of laser beam-wave；Or the YAG solid state laser (Ho:YAG) of holmium is mixed, emit a length of 2.0 microns of laser beam-wave；
The YAG solid state laser (Er:YAG) of er-doped emits a length of 2.9 microns of laser beam-wave.Their optical maser wavelength all just positions
In on the strong absorption peak of water, effective laser-induced sound effect can produce.
If aerial platform flying height with higher, when as more than 100 meters or more, the controlling laser beam that is limited is in the water surface
Hot spot
Size, the compression of Ying Caiyong optical transmitting system sends the angle of divergence of laser beam, or will send laser beam focus as far as possible
In the water surface.
When using laser-induced sound transmitting communication information, modulation better simply to laser beam can be coded modulation, i.e., will
Laser beam modulation is the train of pulse of coding.Or the intensity of laser beam can be modulated.Resulting sound wave can be corresponding
Coding sound wave pulse or intensity there is the sound wave accordingly modulated.At this point, sound wave 17 is believed with the communication that laser beam is loaded with is sent
The correlation properties of breath, i.e. coding characteristic or intensity modulated.The sound wave has ideal propagation distance and under water because of sound wave
Coverage area caused by diverging.The sound wave is intercepted and captured by submarine target platform 20 and is received, and through to acoustic coded pulse or intensity
It modulates the decoding encoded or intensity demodulation obtains communication information.Submarine target 20 can be the platform of various fixations, or fortune
Moving platform.
20 can emit the water surface acoustic signals for being loaded with communication information simultaneously, when acoustic signals reach the water surface, in the water surface
Generate corresponding acoustic vibration.The vibration has the same encoding characteristics of corresponding acoustic vibration or System of Intensity Modulation Property.Aerial platform 15
It can use another exploring laser light beam 25 to be irradiated the water surface.Laser beam 25 can be the continuous laser of frequency stabilization or single-frequency
Beam or quasi-continuous lasing beam.Portion of energy is reflected after the laser beam is irradiated to the water surface, is based on " Doppler " effect, is reflected
The laser frequency of laser beam 26 modulated because of the vibration of the water surface.Reflection laser beam 26 is intercepted and captured by aerial platform and is received, to it
Relevant communication information can be obtained by carrying out frequency demodulation.One simple frequency demodulation method be by reflection laser beam 26 with
Emit laser beam 25 and carry out frequency comparison, the frequency differential of the two represents the frequency that laser beam 25 is obtained in water-reflected
Modulation, namely represent corresponding communication information.Obviously, for this purpose, exploring laser light beam 25 should be single-frequency laser beam and have
Enough frequency stabilities.Modern laser technology can provide laser frequency stabilization in the single-frequency laser beam of tens KHz, enough
Meet the requirement that the present invention applies.In view of the environmental requirement of aerial platform application, the single-frequency of semiconductor laser diode pumping
Solid state laser is a preferable selection such as Nd:YAG laser, and the operation wavelength of laser beam is 1064nm.It can match
Emitted with exploring laser light beam and receives the optical system unified.It is further simplified whole device, which can also be with
The same optical system is shared with the optical system for sending laser beam.In this application, the wave motion of the water surface may influence
Up to the intensity of the reflection laser beam 26 of aerial platform 15.Wave motion itself to the frequency influence of reflection laser beam 26 then mostly compared with
In low frequency range, technically not too much it is difficult to distinguish its frequency modulation(PFM) corresponding with useful communication information.
Claims (8)
1. it is a kind of with airborne device from the method and device for carrying out both-way communication with target in water in the air, with a modulated carrying
There is the emitted optical system collimation of the transmission laser beam of the specific optical maser wavelength of communication information or focuses on the water surface substantially to the water surface
Irradiation, the laser beam generate laser-induced sound sound wave in water surface shallow-layer, which carries relevant communication information, propagate in water
And by intended recipient in water and communication information is obtained, target has the acoustic signals of communication information to water surface transmitting in water, in water
The acoustic vibration with communication information that surface is formed is by another detection Frequency Stabilized Lasers beam of airborne device through detection optical system
Detection, is handled and obtains communication information.
2. in Seeking for Right 1, the specific optical maser wavelength for sending laser beam is 0.4 to 11 micron, especially in the strong suction of water
Receive 1.9 to 3 microns at peak.
3. in Seeking for Right 1, sending laser beam can be modulated continuous laser beam or pulse laser beam or coded pulse
Laser beam.
4. in Seeking for Right 1, the optical maser wavelength of detection Frequency Stabilized Lasers beam is 0.4 to 11 micron.
5. in Seeking for Right 1, device carrier aircraft is to have man-machine, unmanned plane.
6. in Seeking for Right 1, detection Frequency Stabilized Lasers beam is continuous or quasi-continuous single-frequency laser.
7. one kind can carry out the airborne device of the both-way communication between submarine target in the air, device includes sending laser beam laser
Device, communication signal modulator send laser emission optical system, detect Frequency Stabilized Lasers beam laser and its detection optical system,
And the device on detection processing component and submarine target platform includes communication information acoustic receiver demodulating equipment and transmission dress
It sets.
8. in Seeking for Right 7, sending laser emission optical system and detection optical system being the same optical system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811327819.3A CN109586807A (en) | 2018-11-09 | 2018-11-09 | Sky-water means of communication and device |
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| CN201811327819.3A CN109586807A (en) | 2018-11-09 | 2018-11-09 | Sky-water means of communication and device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932785A (en) * | 2019-11-22 | 2020-03-27 | 暨南大学 | Communication system and method based on photoacoustic effect |
| CN111025326A (en) * | 2019-11-28 | 2020-04-17 | 天津津航技术物理研究所 | Laser induced acoustic remote sensing detection method for cross-water-air medium |
| CN114629567A (en) * | 2020-12-08 | 2022-06-14 | 军事科学院系统工程研究院网络信息研究所 | Photoacoustic interconnection bidirectional communication method for air and underwater mobile platform |
| CN114629566A (en) * | 2020-12-08 | 2022-06-14 | 军事科学院系统工程研究院网络信息研究所 | Photoacoustic interconnection bidirectional communication method for water surface and underwater mobile platform |
| WO2022130529A1 (en) * | 2020-12-16 | 2022-06-23 | 日本電信電話株式会社 | Wireless communication device, wireless communication system, and wireless communication method |
| CN114726428A (en) * | 2022-03-03 | 2022-07-08 | 大连海事大学 | Air-sea cross-medium direct two-way communication method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932785A (en) * | 2019-11-22 | 2020-03-27 | 暨南大学 | Communication system and method based on photoacoustic effect |
| CN111025326A (en) * | 2019-11-28 | 2020-04-17 | 天津津航技术物理研究所 | Laser induced acoustic remote sensing detection method for cross-water-air medium |
| CN114629567A (en) * | 2020-12-08 | 2022-06-14 | 军事科学院系统工程研究院网络信息研究所 | Photoacoustic interconnection bidirectional communication method for air and underwater mobile platform |
| CN114629566A (en) * | 2020-12-08 | 2022-06-14 | 军事科学院系统工程研究院网络信息研究所 | Photoacoustic interconnection bidirectional communication method for water surface and underwater mobile platform |
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| CN114726428A (en) * | 2022-03-03 | 2022-07-08 | 大连海事大学 | Air-sea cross-medium direct two-way communication method |
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