CN203243329U - Underwater short-distance communication device based on visible light - Google Patents
Underwater short-distance communication device based on visible light Download PDFInfo
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- CN203243329U CN203243329U CN 201320244884 CN201320244884U CN203243329U CN 203243329 U CN203243329 U CN 203243329U CN 201320244884 CN201320244884 CN 201320244884 CN 201320244884 U CN201320244884 U CN 201320244884U CN 203243329 U CN203243329 U CN 203243329U
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Abstract
The utility model discloses an underwater short-distance communication device based on visible light. The communication device belongs to the field of optical communication and comprises a transmitting module and a receiving module. The transmitting module comprises a processor used for modulating a light signal of a light source, a drive circuit and an LED light source. The receiving module comprises a light receiving module used for receiving a light signal, a signal modulation module and a decoder used for demodulating the received light signal. By modulating a to-be-transmitted message into a light signal, the communication device achieves underwater optical communication with relatively high theoretical bandwidth, so as to greatly improve transmission speed, and the communication device is advantaged by being small in size and low in attenuation.
Description
Technical field
The utility model relates to a kind of communication apparatus, particularly relates to a kind of short-range communication device under water based on visible light.
Background technology
Over past ten years, emerging underwater wireless sensor network technology for obtain continuously, the ocean essential observational data of system, high-spatial and temporal resolution, large spatial and temporal scales provides a kind of brand-new technological means.Underwater wireless sensor network is by a plurality of low costs, low-power consumption, multi-functional integrated micro sensor node forms, these sensor nodes consist of wireless network, has data acquisition, the ability of radio communication and information processing, a plurality of sensors with auxiliary electrode were nodes are arranged in the specific zone, can form wireless sensor network, they are by specific agreement, efficiently, stable, carry out accurately self-organizing, and measure in real time by the cooperation of each sensor node, the information of perception and the various ocean essentials of collection utilizes wireless communication technology with the observation information real-time Transmission.Therefore, can obtain marine environment change in time and space observational data by lay a large amount of cheap wireless sensor nodes in interested marine site, realize the monitoring of the high coverage rate in large-scale observation area, for the marine environmental monitoring of realizing multiple spot, three-dimensional, long sequential, networking, real time implementation, large spatial scale provides technical support.
Because electromagnetic wave has very large decay in water, so the widely used electromagnetic wave radio communication in land is difficult to realize in water.For example, infrared light can not through-fall and so that infrared communication technique can't be applied under water; Electromagnetic wave is decayed very fast in seawater, all be operated near the frequency of about 2.4GHz such as Bluetooth technology and wireless local area network technology, and the decay of the signal of 2.4GHz in seawater is approximately 1695dB/m, and the decay in pure fresh water only is 189dB/m, so radio communication technology also is difficult to realize under water.
Present existing underwater wireless electrical communication system also just is confined to the shallow-layer marine site, and will equip huge antenna system.The degree that as if ultralow frequency can reduce to decay, but the ultralow frequency system is expensive large, and data transmission rate is extremely low.
The utility model content
Because the defects of prior art, technical problem to be solved in the utility model provides a kind of efficient underwater communication device.
For achieving the above object, the utility model provides a kind of short-range communication device under water based on visible light, comprises sending module and receiver module; Described sending module comprises processor, coding demodulator, drive circuit and led light source; The output of described processor connects the input of described coding demodulator, and the output of described coding demodulator connects the input of described drive circuit, and the output of described drive circuit connects the input of described led light source; Described receiver module comprises Optical Receivers, signal condition module and demodulator; Described Optical Receivers is used for receiving the light signal that described led light source sends; The output of described Optical Receivers connects the input of described signal condition module, and the output of described signal condition module connects the input of described demodulator.
Better, the wavelength of described led light source is 475nm.
Better, the wavelength of described led light source is 505nm.
Better, the wavelength of described led light source is 525nm.
The beneficial effects of the utility model are: the utility model simplicity of design, development cost is low and volume is little, can carry out efficiently short distance communication under water, and the utility model has higher theoretical bandwidth simultaneously, and the data volume of comparing the underwater sound wave communications is larger.
Description of drawings
Fig. 1 is the circuit theory schematic diagram of the utility model one embodiment.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, a kind of short-range communication device under water based on visible light comprises sending module 1 and receiver module 6; Described sending module 1 comprises processor 2, coding demodulator 3, drive circuit 4 and led light source 5; The output of described processor 2 connects the input of described coding demodulator 3, and the output of described coding demodulator 3 connects the input of described drive circuit 4, and the output of described drive circuit 4 connects the input of described led light source 5; Described receiver module 6 comprises Optical Receivers 7, signal condition module 8 and demodulator 9; Described Optical Receivers 7 is used for receiving the light signal that described led light source 5 sends; Described signal condition module 8 be used for to the light pulse that receives amplify, filtering; The output of described Optical Receivers 7 connects the input of described signal condition module 8, and the output of described signal condition module 8 connects the input of described demodulator 9, and demodulator 9 is decoded to the received signal.
In the present embodiment, the wavelength of described led light source 5 is 475nm.The MCP2150 type infrared communication controller that described coding demodulator and decoder all adopt Microchip company to produce, its cost is low, low in energy consumption, encapsulation is little, and support IrDA agreement, meet the IrDA1.0 standard, encapsulated the agreement of data link layer and transport layer, and be easy to and interface microcontroller, just can work as long as connect an infrared transceiver.Owing to having reduced required system resource, do not need to have IrDA standard agreement storehouse knowledge yet, both can for system increases new wireless access function, also can save design time.Described drive circuit adopts field effect transistor to realize.It is the photodiode of SLD-70BG2 that described Optical Receivers adopts model.The model that described signal condition module adopts MAIXM company to produce is that the infrared transceiver of MAX3120 is realized.
Visible light communication is owing to being subject to the impact of various factorss such as Optical Absorption, scattering, so that the underwater decay of different wave length is also different, for scope and the reliability that guarantees to communicate by letter, it is extremely important that the light of selection suitable wavelength carries out subsurface communication.
Embodiment two, and the structure of the present embodiment and embodiment one are basic identical, and difference is: the wavelength of described led light source 5 is 505nm.
Embodiment three, and the structure of the present embodiment and embodiment one are basic identical, and difference is: the wavelength of described led light source 5 is 525nm.
Light near ruddiness and purple light part is decayed more obvious under water, and the underwater decay of the light of wavelength in 400nm～500nm scope is minimum, and the light in this wave band has and green glow, blue light and cyan light, and wherein green wavelength is 525nm, blue light wavelength is 475nm, and the cyan light wavelength is 505nm.Blue, green light band can reach 10～20m in the transmission depth of general water body, at feculent water body transmissive 1～2m then, at limpid water body even can thoroughly arrive the degree of depth of 100m.Preferably select the light of blueness, green or cyan as communication medium so carry out under water visible light communication.
More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art need not creative work and just can make many modifications and variations according to design of the present utility model.Therefore, all in the art technical staff comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in the determined protection range by claims.
Claims (4)
1. the short-range communication device under water based on visible light comprises sending module (1) and receiver module (6); It is characterized in that: described sending module (1) comprises processor (2), coding demodulator (3), drive circuit (4) and led light source (5); The output of described processor (2) connects the input of described coding demodulator (3), the output of described coding demodulator (3) connects the input of described drive circuit (4), and the output of described drive circuit (4) connects the input of described led light source (5); Described receiver module (6) comprises Optical Receivers (7), signal condition module (8) and demodulator (9); Described Optical Receivers (7) is used for receiving the light signal that described led light source (5) sends; The output of described Optical Receivers (7) connects the input of described signal condition module (8), and the output of described signal condition module (8) connects the input of described demodulator (9).
2. the short-range communication device under water based on visible light as claimed in claim 1, it is characterized in that: the wavelength of described led light source (5) is 475nm.
3. the short-range communication device under water based on visible light as claimed in claim 1, it is characterized in that: the wavelength of described led light source (5) is 505nm.
4. the short-range communication device under water based on visible light as claimed in claim 1, it is characterized in that: the wavelength of described led light source (5) is 525nm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320244884 CN203243329U (en) | 2013-05-08 | 2013-05-08 | Underwater short-distance communication device based on visible light |
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| CN 201320244884 CN203243329U (en) | 2013-05-08 | 2013-05-08 | Underwater short-distance communication device based on visible light |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119654A (en) * | 2015-08-26 | 2015-12-02 | 南京邮电大学 | Blue light underwater sensing system based on visible light communication |
| CN105356925A (en) * | 2015-09-29 | 2016-02-24 | 浙江大学 | Amphibious communication system based on relay buoy |
| CN105553570A (en) * | 2016-01-25 | 2016-05-04 | 中国人民解放军信息工程大学 | Transmission system based on underwater visible light communication |
| 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 |
| CN112822360A (en) * | 2020-12-30 | 2021-05-18 | 西安电子科技大学 | Deep sea video shooting and wireless transmission integrated system |
-
2013
- 2013-05-08 CN CN 201320244884 patent/CN203243329U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105119654A (en) * | 2015-08-26 | 2015-12-02 | 南京邮电大学 | Blue light underwater sensing system based on visible light communication |
| CN105356925A (en) * | 2015-09-29 | 2016-02-24 | 浙江大学 | Amphibious communication system based on relay buoy |
| CN105356925B (en) * | 2015-09-29 | 2018-09-07 | 浙江大学 | A kind of land and water communication system based on relay buoy |
| CN105553570A (en) * | 2016-01-25 | 2016-05-04 | 中国人民解放军信息工程大学 | Transmission system based on underwater visible light communication |
| CN105553570B (en) * | 2016-01-25 | 2017-12-12 | 中国人民解放军信息工程大学 | A kind of Transmission system based on underwater visible light communication |
| 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 |
| CN105790838B (en) * | 2016-03-24 | 2018-07-17 | 北京邮电大学 | A kind of optical fiber/visible light land and water heterogeneous network framework and communication means |
| CN112822360A (en) * | 2020-12-30 | 2021-05-18 | 西安电子科技大学 | Deep sea video shooting and wireless transmission integrated system |
| CN112822360B (en) * | 2020-12-30 | 2022-05-13 | 西安电子科技大学 | Deep sea video shooting and wireless transmission integrated system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20140508 |