CN110166120A - The two-way visible light communication system of intelligence suitable for multiple-quality water - Google Patents
The two-way visible light communication system of intelligence suitable for multiple-quality water Download PDFInfo
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- CN110166120A CN110166120A CN201910277258.9A CN201910277258A CN110166120A CN 110166120 A CN110166120 A CN 110166120A CN 201910277258 A CN201910277258 A CN 201910277258A CN 110166120 A CN110166120 A CN 110166120A
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- 239000013535 sea water Substances 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims abstract description 16
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/1143—Bidirectional transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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Abstract
The present invention relates to a kind of two-way visible light communication systems of the intelligence suitable for multiple-quality water.Including at least the channel of three groups of two-way visible light communications, every group of channel includes a uplink and downlink link, one of at least corresponding a kind of seawater body of every group of channel aquatic environment；The peak wavelength of light carrier used in every group of channel is in I, IA、IB, one of II or Group III seawater the minimum optical wavelength range of total attenuation coefficient in, the interval of peak wavelength used in each channel is not less than 20 nanometers；Modulated signal is coupled on transmitting light source led after power amplifier and biasing tree, according to the superiority and inferiority of same end link received signals, judges water quality type, selects corresponding uplink and downlink link group；The LED for receiving end detector is converted optical signals into after electric signal by filter module and high linearity amplifier, completes visible light two-way communication by final signal demodulation.The present invention can be communicated according to the channel that the selection of the different intelligent of seawater quality matches, to adapt to different operating environment.
Description
Technical field
The present invention relates to seawater, underwater wireless technical field of photo communication, are suitable for multiple-quality water more particularly, to one kind
The two-way visible light communication system of intelligence.
Background technique
70% or more of ball surface product is taken up an area in ocean, and be not only richly stored with resource in ocean, and to global climate
Variation, human economy and social development suffer from significant impact.For example, Global Greenhouse Effect, tellurian origin of life, new
Resource, new energy, neoformation gene, environment for human survival and sustainable development of society etc..Although the mankind from period in time immemorial just
Start the Exploratory behavior to ocean, but so far, the mankind are very limited to the understanding in most of sea area.Existing water
The lower communication technology mainly has: the long wave radio transmission of ultralow frequency range, since its traffic rate is low, and by the electricity of underwater equipment
Magnetic disturbance is larger, so not being widely applied；Next has underwater acoustic communication technology, and underwater acoustic communication is skill most mature at present
Art, but its traffic rate is not high, and required equipment volume is big, at high cost；And underwater visible light communication be electric signal is added to it is visible
It on light luminescent device, is modulated on light carrier and launches, propagated in seawater channel, then use opto-electronic receiver in receiving end
Device converts optical signals into electric signal, and the original signal of transmitting terminal is restored using the demodulation of signal, untethered remote to realize
Distance communication.
Underwater visible light communication is the transmission window formed based on seawater to light absorption, and underwater light letter is realized in this wave band
Number transmission.Not only transmission rate is big for underwater visible light communication, but also system communication capacity is big, and equipment is light, small power consumption, transmission letter
Number strong security.Therefore underwater visible light communication becomes current research hotspot.
Though however the research of underwater visible light communication system is more, the reception all using commercial detector as system mostly
End, and research emphasis stresses onto the modulation and demodulation technology and coding techniques of optical signal, and does not consider different quality
Influence of the seawater to optical signal.Therefore, it is necessary to the more fully underwater visible light communication system devices of function, can just it be made to answer extensively
In different waters, this has important progradation to its commercialization.
Summary of the invention
The present invention in order to overcome at least one of the drawbacks of the prior art described above, provides a kind of intelligence for multiple-quality water
Two-way visible light communication system can be communicated according to the channel that the selection of the different intelligent of seawater quality matches, to adapt to
Different operating environment.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of intelligence suitable for multiple-quality water is double
To visible light communication system, including at least the channel of three groups of two-way visible light communications, every group of channel include a uplink and
One downlink, one of at least corresponding a kind of seawater body of every group of channel aquatic environment；Light carrier used in every group of channel
Peak wavelength is in the minimum optical wavelength range of total attenuation coefficient of one of I, IA, IB, II or Group III seawater, each channel institute
It is not less than 20 nanometers with the interval of peak wavelength；Modulated signal is coupled to transmitting light source after power amplifier and biasing tree
On LED, according to the superiority and inferiority of same end link received signals, water quality type is judged, select corresponding uplink and downlink link group；Receiving end
The LED of detector is converted optical signals into after electric signal by filter module and high linearity amplifier, by final signal
Visible light two-way communication is completed in demodulation.
Further, the channel of three groups of two-way visible light communications is respectively as follows:
First group of channel: uplink by emission wavelength be 385nm-405nm purple LED be transmitting terminal, emission wavelength is
440nm-460nm blue-ray LED is receiving end composition；Downlink is transmitting by the blue-ray LED that emission wavelength is 440nm-460nm
End, commercialization Si base detector are receiving end composition；
Second group of channel: uplink by emission wavelength be 520nm-540nm green light LED be transmitting terminal, emission wavelength is
590nm-610nm orange light LED is receiving end composition；Downlink by emission wavelength 440nm-460nm blue-ray LED be transmitting terminal,
Commercial Si base detector is receiving end composition；
Third group channel: uplink by emission wavelength be 520nm-540nm green light LED be transmitting terminal, emission wavelength is
590nm-610nm orange light LED is receiving end composition；Downlink by emission wavelength 590nm-610nm orange light LED be transmitting terminal,
Emission wavelength is that 630nm-650nm red-light LED is that receiving end is constituted.
Further, light emitting and the LED of optical detection used in each link are the device with two-way function.I.e. should
The emission spectrum of LED is in seawater window, response spectrum is in seawater window.It reduces the use of Si base detector to the greatest extent, improves
Reliability of the system in briny environment.
It should be noted that the wavelength of uplink downlink is preferred embodiment, for only in above-mentioned three groups of channels
Uplink downlink medium wavelength range is only modified, or the uplink downlink between each group channel is swapped and is formed new
Channel, it should also within the scope of the present invention.
In the present invention, the receiving end in various channels and transmitting terminal can be time sharing shared, each channel can simultaneously or portion
The division of labor is made, and improves signal transmission quality by algorithm, such as maximal-ratio combining diversity.
Further, in first group of channel, the purple LED of uplink works in light-emitting mode, blue-ray LED work
Make in photodetection mode, the blue-ray LED of downlink works in light-emitting mode；In second group of channel, uplink
Green light LED work in light-emitting mode, orange light LED operation works in luminous mould in photovoltaic mode, the blue-ray LED of downlink
Formula；In the third group channel, the green light LED of uplink works in light-emitting mode, and orange light LED operation is in photodetection mould
Formula, for the orange light LED operation of downlink in light-emitting mode, red-light LED works in photodetection mode.
Further, the LED component in every group of channel is equipped with standby device.It can when prototype part breaks down or damages
To call standby device in time, to improve the stability of system.
Further, uplink transmitter central wavelength is differed with downlink transmission end central wavelength in all channels
40nm~60nm, to reduce the optical crosstalk between optical path.
Further, can be carried out between each group channel uplink and or downlink any exchange, be reassembled as new
Channel.Ocean can substantially be divided into 5 major class, due to the diversification of water quality, also will appear other water quality situations, specific
In use, can be according to actual water quality situation, by exchanging the uplink downlink in each channel, so that group is combined into new lead to
Road is adapted to a variety of different water quality situations.
Further, each group channel can work independently, can also part or work at the same time entirely.
In the 1950s, the data that Jerlov is collected using spectral irradiance instrument, overflow attenuation coefficient based on spectrum and set
First Quantitative Classification Method (Jerlov, nineteen fifty-one) for representing global ocean is counted out, divides I, II and III tri- ocean water body
Class, discovery in 1964 have a large amount of ocean transmitted spectrums to fall in typical I, between II after, in addition IA、IB.It is most limpid from Type I
It is most muddy to Type III.The chain that system provided by the invention can be matched according to the selection of the different intelligent of ocean water quality
Road, in limpid I, IAAnd IBIn class Marine water, unrestrained attenuation coefficient is smaller in water for the light of royal purple wave band, and transmission range is farthest,
It is preferred that first group of channel；In general II, Group III Marine water, blue wave band transmission range is farthest, green light band transmission distance
It is remote from than purple light, preferably second group of channel；And in more muddy Group III Marine water, the unrestrained attenuation coefficient of yellow green wave band
Smaller, transmission range is farthest, preferably third group channel.
Compared with prior art, beneficial effect is: a kind of intelligence suitable for multiple-quality water provided by the invention is two-way can
Light-exposed communication system, at least three kinds of two-way visible light communication channels are seen in setting, wherein each channel includes uplink/downlink two
Link, uplink transmitting terminal central wavelength differs about 50nm with downlink end central wavelength in all links, is able to achieve double
To visible light communication, while the downloading and upload of data are carried out, avoids crosstalk.And the device can be according to seawater quality not
Together, the channel that intelligent selection matches is communicated, to adapt to different operating environment.LED component is all provided in all links
Standby device, to improve system stability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present system.
Fig. 2 is that 380nm-405nmLED emission wavelength and 440nm-460nmLED-PD receive wavelength in the embodiment of the present invention
Figure.
Fig. 3 is that 590nm-610nmLED-PD and 630nm-650nm LED-PD receives wavelength graph in the embodiment of the present invention.
Fig. 4 be in the embodiment of the present invention seawater to optical wavelength attenuation coefficient figure.
Specific embodiment
Attached drawing only for illustration, is not considered as limiting the invention；In order to better illustrate this embodiment, attached
Scheme certain components to have omission, zoom in or out, does not represent the size of actual product；To those skilled in the art,
The omitting of some known structures and their instructions in the attached drawings are understandable.Being given for example only property of positional relationship is described in attached drawing
Illustrate, is not considered as limiting the invention.
As shown in Figure 1, a kind of two-way visible light communication system of intelligence for multiple-quality water, two-way comprising three groups or more
The channel of visible light communication, every group of channel include a uplink and a downlink.Wherein, each channel respectively correspond I,
IA、IB, II, one of Group III seawater body aquatic environment, it is ensured that above-mentioned 5 quasi-representative water quality can be included.Every group of channel
The peak wavelength of light carrier used is in I, IA、IB, one of II or Group III seawater the minimum optical wavelength model of total attenuation coefficient
In enclosing, the interval of peak wavelength used in each channel is preferably not less than 20 nanometers.According to the superiority and inferiority of same end link received signals, judgement
Water quality type selects corresponding uplink and downlink link group and corresponding algorithm.Wherein, in the receiving end first choice module of each link
Difunctional LED.
In the present invention, modulated signal is coupled on transmitting light source led after power amplifier and biasing tree, wherein root
According to the superiority and inferiority of same end link received signals, water quality type is judged, select corresponding uplink and downlink link group.Receiving end operating mode
It converts optical signals into after electric signal for the LED of detector by filter module and high linearity amplifier, by final letter
Number demodulation complete visible light two-way communication.
As shown in Figure 1, it is transmitting that the uplink of first group of channel (1), which is 385nm-405nm purple LED by emission wavelength,
End, emission wavelength are that 440nm-460nm blue-ray LED is that receiving end is constituted；Downlink is 440nm-460nm's by emission wavelength
Blue-ray LED is transmitting terminal, and commercial Si base detector is receiving end composition.The detection peak value of 440nm-460nm LED-PD just wraps
The emission wavelength of the LED containing 405nm, as shown in Figure 2；
It is transmitting terminal that the uplink of second group of channel (2), which is 520nm-540nm green light LED by emission wavelength, and shine wave
A length of 590-610nm orange light LED is receiving end composition；Downlink is transmitting by emission wavelength 440nm-460nm blue-ray LED
End, commercial Si base detector are receiving end composition.It just includes 520nm- that 590nm-610nm LED-PD, which detects peak value,
540nmLED emission wavelength, as shown in Figure 3.
It is transmitting terminal that the uplink in third group channel (3), which is 520nm-540nm green light LED by emission wavelength, and shine wave
A length of 590nm-610nm orange light LED is receiving end composition；Downlink is transmitting by emission wavelength 590nm-610nm orange light LED
End, emission wavelength are that 630nm-650nm red-light LED is that receiving end is constituted.The detection wave crest of 630nm-650nm LED-PD is just
The emission wavelength for being 590nm-610nm LED comprising emission wavelength, as shown in Figure 3
The two-way visible light communication system of multichannel, reduces the use of Si base detector, improves the stability of system.
All LED components in three channels can provide standby device, can call in time when prototype part breaks down or damages standby
With device, to improve the stability of system.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (8)
1. a kind of two-way visible light communication system of intelligence suitable for multiple-quality water, which is characterized in that two-way including at least three groups
The channel of visible light communication, every group of channel include a uplink and a downlink, and every group of channel is at least corresponding a kind of
One of seawater body aquatic environment；The peak wavelength of light carrier used in every group of channel is in I, IA、IB, II or Group III seawater it
In the minimum optical wavelength range of one total attenuation coefficient, the interval of peak wavelength used in each channel is not less than 20 nanometers；Modulation letter
Number it is coupled on transmitting light source led after power amplifier and biasing tree, according to the superiority and inferiority of same end link received signals, judgement
Water quality type selects corresponding uplink and downlink link group；Receive end detector LED convert optical signals into after electric signal by
Filter module and high linearity amplifier complete visible light two-way communication by final signal demodulation.
2. the two-way visible light communication system of the intelligence according to claim 1 suitable for multiple-quality water, which is characterized in that institute
The channel for the three groups of two-way visible light communications stated is respectively as follows:
First group of channel: uplink by emission wavelength be 385nm-405nm purple LED be transmitting terminal, emission wavelength is
440nm-460nm blue-ray LED is receiving end composition；Downlink is transmitting by the blue-ray LED that emission wavelength is 440nm-460nm
End, commercialization Si base detector are receiving end composition；
Second group of channel: uplink by emission wavelength be 520nm-540nm green light LED be transmitting terminal, emission wavelength is
590nm-610nm orange light LED is receiving end composition；Downlink by emission wavelength 440nm-460nm blue-ray LED be transmitting terminal,
Commercial Si base detector is receiving end composition；
Third group channel: uplink by emission wavelength be 520nm-540nm green light LED be transmitting terminal, emission wavelength is
590nm-610nm orange light LED is receiving end composition；Downlink by emission wavelength 590nm-610nm orange light LED be transmitting terminal,
Emission wavelength is that 630nm-650nm red-light LED is that receiving end is constituted.
3. the two-way visible light communication system of the intelligence according to claim 2 suitable for multiple-quality water, which is characterized in that each
Light emitting used in a link and the LED of optical detection are the device with two-way function.
4. the two-way visible light communication system of the intelligence according to claim 2 suitable for multiple-quality water, which is characterized in that institute
In the first group of channel stated, the purple LED of uplink works in light-emitting mode, and blue-ray LED works in photodetection mode, under
The blue-ray LED of line link works in light-emitting mode；In second group of channel, the green light LED of uplink works in luminous
Mode, orange light LED operation work in light-emitting mode in photovoltaic mode, the blue-ray LED of downlink；The third group channel
In, the green light LED of uplink works in light-emitting mode, and orange light LED operation is in photodetection mode, the orange light of downlink
For LED operation in light-emitting mode, red-light LED works in photodetection mode.
5. the two-way visible light communication system of the intelligence according to claim 3 suitable for multiple-quality water, which is characterized in that every
LED component in group channel is equipped with standby device.
6. the two-way visible light communication system of the intelligence according to any one of claims 2 to 5 suitable for multiple-quality water, special
Sign is, in all channels uplink transmitter central wavelength differed with downlink transmission end central wavelength 40nm~
60nm。
7. the two-way visible light communication system of the intelligence according to claim 6 suitable for multiple-quality water, which is characterized in that root
Can be carried out according to water quality situation, between each group channel uplink and or downlink any exchange, be reassembled as new logical
Road.
8. the two-way visible light communication system of the intelligence according to claim 6 suitable for multiple-quality water, which is characterized in that each
Group channel can work independently, can also part or work at the same time entirely.
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Cited By (4)
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| CN111404848A (en) * | 2020-03-20 | 2020-07-10 | 中山大学 | Progressive optimal marine communication system channel estimation method |
| CN113655495A (en) * | 2021-08-31 | 2021-11-16 | 自然资源部第二海洋研究所 | Satellite-borne marine laser radar optimal waveband evaluation method based on water body diffuse attenuation coefficient spectral dependence |
| CN114465665A (en) * | 2022-01-24 | 2022-05-10 | 桂林电子科技大学 | Light beam forming method based on maximum ratio combination under strong turbulence channel |
| CN117554299A (en) * | 2024-01-09 | 2024-02-13 | 深圳华创芯光科技有限公司 | Visible light communication water quality monitoring method |
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