CN102916744A - Underwater LED visible light communication system - Google Patents
Underwater LED visible light communication system Download PDFInfo
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- CN102916744A CN102916744A CN2011102244613A CN201110224461A CN102916744A CN 102916744 A CN102916744 A CN 102916744A CN 2011102244613 A CN2011102244613 A CN 2011102244613A CN 201110224461 A CN201110224461 A CN 201110224461A CN 102916744 A CN102916744 A CN 102916744A
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Abstract
The invention relates to an underwater LED (light-emitting diode) visible light communication system. The underwater LED visible light communication system comprises a water-proof and sealed transmitting device and a water-proof and sealed receiving device which are placed underwater; the transmitting device comprises a light source and a control unit for modulating a light signal emitted by the light source according to information to be transmitted; and the receiving device comprises a light receiving unit for receiving the modulated light signal from the transmitting device, and a demodulating unit for demodulating the received modulated light signal so as to restore the transmitted information. According to the technical solution, by modulating the transmitted information into the light signal, underwater wireless optical communication is achieved, thus not only improving the transmission rate and reducing the size and attenuation, but also avoiding interference to a human body and surrounding electronic equipment and achieving dual functions of lighting and communication.
Description
Technical field
The present invention relates to optical communication field, more particularly, relate to a kind of visible light communication system of LED under water.
Background technology
The subsurface communication technology comprises sonar technique and conventional wireless electrical communication technology.Sonar technique is the most ripe present subsurface communication technology, but the propagation velocity of sound in water is low, no more than 1/20th of the light velocity, the loss of the scattering of sound wave in water, transmission and the factors such as interference of echo are also so that the development of underwater sound equipment is very difficult.Simultaneously, when with the underwater small sensor communication, volume is larger, and energy consumption is more.And for radio communication, because that electromagnetic wave decay in water is larger, so that be difficult in the wireless communications application under water realize, present existing underwater wireless communication system is confined to the shallow-layer marine site, and the huge antenna system of needs.And radio communication may cause interference to human body and peripheral electronic equipment.
Summary of the invention
The technical problem to be solved in the present invention is that the defective that above-mentioned transmission rate is low, volume is large, energy consumption is many, decay is large, easy generation is disturbed for prior art provides a kind of visible light communication system of LED under water.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of visible light communication system of LED under water:
Comprise and placing under water and separately dispensing device and the receiving system of waterproof sealing;
The control unit that described dispensing device comprises led light source and is used for modulating according to information to be passed the light signal that described led light source sends;
Described receiving system comprises for the light receiving unit that receives from the modulated light signal of described dispensing device, and is used for the modulated light signal that receives separated to be in harmonious proportion amplifying to reduce the demodulating unit of described information to be passed.
In the visible light communication system of LED under water of the present invention, described control unit specifically comprises:
Be used for judging whether described information to be passed is the judging unit of analog signal;
Be used for when described information to be passed is analog signal, described information to be passed being carried out analog-to-digital conversion with the analog to digital converter of generating digital signal;
Be used for amplifying the first amplifier of described digital signal;
Be used for according to the modulating unit of modulating light signal that described light source sends through the digital signal of amplifying and the described information to be passed of foundation is modulated the light signal that described light source sends when described information to be passed is digital signal.
In the visible light communication system of LED under water of the present invention, described light receiving unit comprises be used to the lens that converge modulated light signal.
In the visible light communication system of LED under water of the present invention, described lens are Fresnel Lenses.
In the visible light communication system of LED under water of the present invention, described demodulating unit specifically comprises:
Light signal after being used for converging is converted to the optical-electrical converter of the signal of telecommunication;
Be used for the described signal of telecommunication is carried out digital-to-analogue conversion to be reduced to the digital to analog converter of described information to be passed.
In the visible light communication system of LED under water of the present invention, the wavelength of described light source is 400nm～500nm.
In the visible light communication system of LED under water of the present invention, described dispensing device and described receiving system are positioned in the waterproof sealing case.
In the visible light communication system of LED under water of the present invention, described waterproof sealing case is made by Merlon.
In the visible light communication system of LED under water of the present invention, described light source is led light source.
In the visible light communication system of LED under water of the present invention, described waterproof sealing case is made by ABS resin, fibre-glass reinforced polyester or die casting aluminium.
Implement technical scheme of the present invention, have following beneficial effect: by information to be passed is modulated in the LED light signal, realize wireless light communication under water.The technical program has not only improved transmission rate, has reduced volume, has reduced decay, but also can avoid the interference to human body and peripheral electronic equipment, realizes illumination and the dual-use function of communicating by letter.Can be applicable to the fields such as seabed monitoring, marine ships communication, search under water.Further, along with the extensive application of LED subaqual landscape illumination, the communication of LED visible light underwater wireless can with these under water LED equipment combine, realize in the air and the communicating by letter of underwater environment.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation according to the visible light communication system of LED under water of the preferred embodiment of the present invention;
Fig. 2 is the structural representation of dispensing device 101 shown in Figure 1;
Fig. 3 is the structural representation of receiving system 102 shown in Figure 1.
Embodiment
Fig. 1 is the structural representation according to the visible light communication system of LED under water 100 of the preferred embodiment of the present invention, comprises placing under water and separately dispensing device 101 and the receiving system 102 of waterproof sealing.Can for example be positioned over the waterproof sealing case about dispensing device 101 and receiving system 102 concrete sealing means, the material that adopts can be such as but not limited to Merlon, ABS (Acrylonitrile Butadiene Styrene, acrylonitrile-butadiene-styrene copolymer) resin, fibre-glass reinforced polyester or die casting aluminium.Along with the progress of technology, new material or new sealing means also may appear, and the present invention does not limit this.
Such as Fig. 1, the control unit 1012 that dispensing device 101 comprises led light source 1011 and is used for modulating according to information to be passed the light signal that described led light source sends; Receiving system 102 comprises for the light receiving unit 1021 that receives from the modulated light signal of described dispensing device, and is used for the modulated light signal that receives separated to be in harmonious proportion amplifying to reduce the demodulating unit 1022 of described information to be passed.
The led light source here can adopt any LED visible light source.But learn through many experiments that the decay of the visible light of wavelength between 400nm～500nm is minimum, can preferentially select.In addition, select the larger LED lamp of power, the distance that signal transmits will be farther.
In an embodiment of the present invention, control unit 1012 specifically comprises analog to digital converter 1012a, the first amplifier 1012b, modulating unit 1012c, judging unit 1012d, as shown in Figure 2.Judging unit 1012d is used for judging whether described information to be passed is analog signal.Analog to digital converter 1012a is used for when described information to be passed is analog signal described information to be passed being carried out analog-to-digital conversion with the generating digital signal.The first amplifier 1012b is used for amplifying described digital signal.Modulating unit 1012c be used for according to modulate light signal that described light source sends through the digital signal of amplifying and when described information to be passed is digital signal the described information to be passed of foundation modulate the light signal that described light source sends.Modulation technique about light signal strength can referring to prior art, repeat no more herein.
In an embodiment of the present invention, demodulating unit 1022 specifically comprises optical-electrical converter 1022a, digital to analog converter 1022b, as shown in Figure 3.Light signal after optical-electrical converter 1022a is used for converging is converted to the signal of telecommunication.Digital to analog converter 1022b is used for the described signal of telecommunication is carried out digital-to-analogue conversion to be reduced to described information to be passed.
The present invention realizes wireless light communication under water by information to be passed is modulated in the LED light signal.The technical program has not only improved transmission rate, has reduced volume, has reduced decay, but also can avoid the interference to human body and peripheral electronic equipment, realizes illumination and the dual-use function of communicating by letter.Further, along with the extensive application of LED subaqual landscape illumination, the communication of LED visible light underwater wireless can with these under water LED equipment combine, realize in the air and the communicating by letter of underwater environment.
Technical scheme of the present invention can be applicable to the fields such as seabed monitoring, marine ships communication, search under water.By adopting this scheme and just can carrying out all-the-way tracking to series of parameters such as the pollution condition of marine environment, water temperature, mineral contents in conjunction with the seabed sensing technology.
The above is described embodiments of the invention by reference to the accompanying drawings; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (10)
1. a LED visible light communication system under water is characterized in that, comprises placing under water and separately dispensing device and the receiving system of waterproof sealing;
The control unit that described dispensing device comprises light source and is used for modulating according to information to be passed the light signal that described light source sends;
Described receiving system comprises for the light receiving unit that receives from the modulated light signal of described dispensing device, and is used for the modulated light signal that receives separated to be in harmonious proportion amplifying to reduce the demodulating unit of described information to be passed.
2. the visible light communication system of LED under water according to claim 1 is characterized in that described control unit specifically comprises:
Be used for judging whether described information to be passed is the judging unit of analog signal;
Be used for when described information to be passed is analog signal, described information to be passed being carried out analog-to-digital conversion with the analog to digital converter of generating digital signal;
Be used for amplifying the first amplifier of described digital signal;
Be used for according to the modulating unit of modulating light signal that described light source sends through the digital signal of amplifying and the described information to be passed of foundation is modulated the light signal that described light source sends when described information to be passed is digital signal.
3. the visible light communication system of LED under water according to claim 1 is characterized in that described light receiving unit comprises be used to the lens that converge modulated light signal.
4. the visible light communication system of LED under water according to claim 3 is characterized in that, described lens are Fresnel Lenses.
5. the visible light communication system of LED under water according to claim 3 is characterized in that described demodulating unit specifically comprises:
Light signal after being used for converging is converted to the optical-electrical converter of the signal of telecommunication;
Be used for the described signal of telecommunication is carried out digital-to-analogue conversion to be reduced to the digital to analog converter of described information to be passed.
6. the visible light communication system of LED under water according to claim 1 is characterized in that, the wavelength of described led light source is 400nm～500nm.
7. the visible light communication system of LED under water according to claim 1 is characterized in that, described dispensing device and described receiving system are positioned in the waterproof sealing case.
8. the visible light communication system of LED under water according to claim 1 is characterized in that, described waterproof sealing case is made by Merlon.
9. the visible light communication system of LED under water according to claim 1 is characterized in that, described light source is led light source.
10. the visible light communication system of LED under water according to claim 1 is characterized in that, described waterproof sealing case is made by ABS resin, fibre-glass reinforced polyester or die casting aluminium.
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| CN2011102244613A CN102916744A (en) | 2011-08-06 | 2011-08-06 | Underwater LED visible light communication system |
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| CN2011102244613A CN102916744A (en) | 2011-08-06 | 2011-08-06 | Underwater LED visible light communication system |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038292A (en) * | 2014-04-04 | 2014-09-10 | 中国科学院上海光学精密机械研究所 | Underwater short-distance high-speed wireless optical information transparent transmission device |
| CN104316982A (en) * | 2014-09-17 | 2015-01-28 | 北京理工大学 | Fresnel-dual-lens-unit-based visible light communication receiving antenna design method |
| CN105024753A (en) * | 2015-06-30 | 2015-11-04 | 中国科学院声学研究所 | Deepwater visible light synchronizer |
| CN105119654A (en) * | 2015-08-26 | 2015-12-02 | 南京邮电大学 | Blue light underwater sensing system based on visible light communication |
| EP2974083A2 (en) | 2013-03-15 | 2016-01-20 | Fairfield Industries Incorporated | High-bandwidth underwater data communication system |
| CN105680941A (en) * | 2016-02-26 | 2016-06-15 | 中国科学技术大学 | Underwater LED (Light-Emitting Diode) long distance communication system based on visible light |
| CN105790838A (en) * | 2016-03-24 | 2016-07-20 | 北京邮电大学 | Water-land optical communication network architecture and communication method based on interconnection between underwater visible light communication network units (UVNU) and fiber |
| CN105826157A (en) * | 2016-05-20 | 2016-08-03 | 中国人民解放军信息工程大学 | Underwater visible light communication receiving detection method, underwater visible light communication receiving detection device and underwater visible light communication system |
| CN105848359A (en) * | 2016-05-23 | 2016-08-10 | 浙江大学 | Underwater spectrum-adjustable lighting device and spectrum adjusting method thereof |
| US9490910B2 (en) | 2013-03-15 | 2016-11-08 | Fairfield Industries Incorporated | High-bandwidth underwater data communication system |
| CN107425909A (en) * | 2017-05-17 | 2017-12-01 | 复旦大学 | A kind of underwater lighting and communication system based on visible light lasers light source |
| CN109728858A (en) * | 2019-01-11 | 2019-05-07 | 中国石油大学(北京) | Underwater multidirectional laser communication device |
| CN110113110A (en) * | 2019-04-02 | 2019-08-09 | 南京邮电大学 | Underwater visible light communication device |
| US10488537B2 (en) | 2016-06-30 | 2019-11-26 | Magseis Ff Llc | Seismic surveys with optical communication links |
| CN110995357A (en) * | 2019-12-02 | 2020-04-10 | 大连理工大学 | Novel high-robustness underwater optical communication system |
| CN111162841A (en) * | 2020-04-07 | 2020-05-15 | 山东赛马力动力科技有限公司 | Underwater communication device using visible light |
| US10673539B2 (en) | 2016-08-25 | 2020-06-02 | King Abdullah University Of Science And Technology | Systems and methods for underwater illumination, survey, and wireless optical communications |
| CN114665960A (en) * | 2022-05-03 | 2022-06-24 | 大连理工大学 | Anti-interference underwater visible light communication system |
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| US10263711B2 (en) | 2013-03-15 | 2019-04-16 | Magseis Ff Llc | High-bandwidth underwater data communication system |
| US9490910B2 (en) | 2013-03-15 | 2016-11-08 | Fairfield Industries Incorporated | High-bandwidth underwater data communication system |
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| CN105119654A (en) * | 2015-08-26 | 2015-12-02 | 南京邮电大学 | Blue light underwater sensing system based on visible light communication |
| CN105680941B (en) * | 2016-02-26 | 2018-04-10 | 中国科学技术大学 | A kind of underwater LED long haul communications systems based on visible ray |
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Application publication date: 20130206 |