CN112436890A - Ultraviolet light communication system applied to ship - Google Patents
Ultraviolet light communication system applied to ship Download PDFInfo
- Publication number
- CN112436890A CN112436890A CN202011259279.7A CN202011259279A CN112436890A CN 112436890 A CN112436890 A CN 112436890A CN 202011259279 A CN202011259279 A CN 202011259279A CN 112436890 A CN112436890 A CN 112436890A
- Authority
- CN
- China
- Prior art keywords
- ultraviolet light
- communication system
- transmitting
- signal
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- H04B10/40—Transceivers
-
- 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
- H04B10/60—Receivers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
The invention relates to the technical field of ship body communication systems, and particularly discloses an ultraviolet light communication system applied to ships, which comprises: the transmitting terminal is used for transmitting data and information to the receiving party; the receiving end is used for receiving the information and data transmitted by the transmitting party; the atmosphere channel of ultraviolet light communication is used for transmitting information and data of a transmitting end and a receiving end. The method utilizes ultraviolet light and atmosphere as media to effectively transmit data in an ultraviolet light coverage range, and has the characteristics of low noise, high efficiency, non-line-of-sight transmission and the like.
Description
Technical Field
The disclosure relates to the technical field of ship body communication systems, in particular to an ultraviolet light communication system applied to ships.
Background
The ship body communication system is a general name of a ground communication system, a satellite communication system, a positioning system and a safety information system, and in the normal shipping process of the ship, the communication system provides a large amount of indispensable information for the ship, such as positioning information, shore-based control information, course information and the like, and is an indispensable key component of the ship.
In recent years, the development of shipping industry has promoted ships to sail toward ocean and deep sea routes, and in order to ensure the safety of sailing ocean ships, it is necessary to improve the performance of communication systems.
The traditional ship body communication system comprises infrared laser communication and ship radio communication, wherein the infrared laser communication is typical line-of-sight communication, and complicated operations such as target aiming, infrared laser capturing and the like are required in the communication process; with the continuous development of the ship radio communication technology, the frequency band resources of radio signals are increasingly tense, and communication in different areas at different time intervals is required, so that all-weather communication cannot be ensured.
The communication method using the propagation characteristic of light in the air is called optical wireless communication, and the communication method uses light as a carrier of signals, can realize optical speed transmission of information such as videos, characters, images and the like, and greatly improves the speed of signal transmission. Meanwhile, the optical wireless communication can meet the requirement of bidirectional information transmission, and the communication system can realize efficient, rapid and safe data transmission only by configuring an optical transmitter and a receiver.
Disclosure of Invention
The invention aims to provide an ultraviolet light communication system applied to a ship, which is used for solving the problems of the traditional ship body communication system.
In order to achieve the above object, a basic aspect of the present invention provides an ultraviolet light communication system applied to a ship, including:
the transmitting terminal is used for transmitting data and information to the receiving party;
the receiving end is used for receiving the information and data transmitted by the transmitting party;
the atmosphere channel of ultraviolet communication is used for transmitting information and data of a transmitting end and a receiving end;
wherein, the atmospheric transmittance of the system is calculated according to the following formula:
is provided with L0Distance of light source to target, R, of ultraviolet lightvIs the visible distance, lambda, of the current atmosphere0Is the wavelength of the ultraviolet light;
the transmitting power of the transmitting end is calculated according to the following formula:
let P0Initial power for ultraviolet light emission, ArIs the aperture size of the signal receiver, KeIs the atmospheric transmission attenuation coefficient.
Preferably, the transmitting end includes: a signal input unit for inputting information;
the modulation circuit is electrically connected with the signal input device and is used for modulating the input information;
the ultraviolet light source is electrically connected with the modulation circuit and is used for sending out the modulated information along with the ultraviolet light;
and the driving circuit is used for driving the ultraviolet light source.
Preferably, the receiving end includes: a filter for shielding a signal of an interference source;
the ultraviolet light signal receiver is used for converting the ultraviolet light signal into an electric signal;
the demodulation circuit is electrically connected with the ultraviolet light signal receiver and is used for demodulating the electric signal processed by the ultraviolet light signal receiver;
and the signal output device is electrically connected with the demodulation circuit and used for outputting the demodulated electric signal.
Preferably, the receiving end further comprises an amplifying circuit electrically connected to the demodulating circuit for amplifying the electrical signal processed by the photomultiplier.
Preferably, the ultraviolet light signal receiver comprises an avalanche photodiode and a photomultiplier electrically connected to the avalanche photodiode.
Preferably, the ultraviolet light source is an ultraviolet lamp.
Preferably, the transmitting terminal further comprises a frequency modulator electrically connected to the driving circuit for controlling the power of the ultraviolet light source.
The principle and the effect of the invention are as follows:
ultraviolet light refers to light radiation of electromagnetic waves with a wavelength of 0.4-0.01 micrometer, and the frequency of the ultraviolet light is higher than that of visible light. Due to the strong absorption effect of the earth ozone layer on ultraviolet light, the content of the ultraviolet light on the surface accessory is almost zero, and the characteristic enables the surface accessory to realize zero background noise if adopting ultraviolet light communication, thereby greatly improving the precision and the efficiency of data transmission. As such, among various optical wireless communication technologies, ultraviolet communication technology has attracted attention from researchers, and has been improving.
The ultraviolet light communication system of the invention has the following advantages:
1. non-line-of-sight transmission;
the traditional infrared laser communication is typical line-of-sight communication, complex operations such as target aiming, infrared laser capturing and the like are required in the communication process, non-line-of-sight transmission is the most obvious characteristic of an ultraviolet light communication technology, and different from the infrared laser communication technology, an ultraviolet light communication system medium is an atmospheric molecule, and ultraviolet light is captured by a signal receiving end in a form of an area instead of a certain light spot after being scattered by the atmospheric molecule and aerosol particles, so that the ultraviolet laser communication can realize non-line-of-sight signal transmission, can avoid various obstacles and is very wide in coverage.
2. The background noise is low;
as described above, the ozone layer of the earth atmosphere absorbs 99% or more of the ultraviolet rays from the earth, and therefore the ultraviolet ray content near the earth surface is very low, almost zero. Therefore, the background noise of the ultraviolet light communication system is very low and the signal-to-noise ratio is high no matter the signal is transmitted or received. In an ultraviolet light communication system, a signal detector with high sensitivity is adopted, and accurate transmission of information can be realized only by acquiring a small amount of ultraviolet light. At present, a signal acquisition device with a wider field of view is usually added to a signal detector device of an ultraviolet communication system, so that the precision of the ultraviolet communication system can be further improved.
3. The anti-interference capability is strong;
the ultraviolet light communication system is limited by the absorption and scattering action of atmospheric molecules and particles, and ultraviolet light is attenuated regularly, so that the signal transmission distance of the ultraviolet light communication system is relatively short. In the ultraviolet light communication system, the specific transmitting power can be set by judging the current communication distance and combining the law of power attenuation, so that the ultraviolet light communication system can cover a specific communication area, and cannot receive the current ultraviolet light signal outside the area, thereby improving the safety of the ultraviolet light communication system.
4. All-weather work;
with the continuous development of the ship radio communication technology, the frequency band resource of the radio signal is increasingly tense, and the adoption of the ultraviolet light communication does not occupy the radio frequency band resource, so that the all-weather 24-hour uninterrupted work can be realized.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of an ultraviolet light communication system applied to a ship according to the present invention;
fig. 2 is a schematic diagram of an embodiment of an ultraviolet communication system applied to a ship according to the present invention.
Detailed Description
The following is further detailed by the specific embodiments:
example (b):
as shown in fig. 1, an ultraviolet light communication system applied to a ship includes:
the transmitting terminal is used for transmitting data and information to the receiving party;
the receiving end is used for receiving the information and data transmitted by the transmitting party;
the atmosphere channel of ultraviolet communication is used for transmitting information and data of a transmitting end and a receiving end;
the signal transmission quality of the ultraviolet light communication system is highly related to the transmittance of the atmosphere and the attenuation characteristic of ultraviolet laser, and the lower the transmittance of the atmosphere is, the more obvious the scattering effect of ultraviolet light in the atmosphere is, and the shorter the transmission distance of the ultraviolet light is. Conversely, the higher the atmospheric transmittance, the longer the ultraviolet light travels in air. The application scene of this patent is the two-way defeated of information of ocean vessel in certain distance.
Wherein, the atmospheric transmittance of the system is calculated according to the following formula:
is provided with L0Distance of light source to target, R, of ultraviolet lightvIs the visible distance, lambda, of the current atmosphere0Is the wavelength of the ultraviolet light;
the transmitting power of the transmitting end is calculated according to the following formula:
let P0Initial power for ultraviolet light emission, ArIs the aperture size of the signal receiver, KeIs the atmospheric transmission attenuation coefficient.
Wherein, the transmitting terminal includes: a signal input unit for inputting information;
the modulation circuit is electrically connected with the signal input device and is used for modulating the input information;
the ultraviolet light source is electrically connected with the modulation circuit and is used for sending out the modulated information along with the ultraviolet light;
the drive circuit is used for driving the ultraviolet light source;
the transmitting end also comprises a frequency modulator electrically connected with the driving circuit and used for controlling the power of the ultraviolet light source.
In at least one embodiment, when selecting the light source of the ship ultraviolet light communication system, it needs to take comprehensive consideration from the aspects of the type of the light source, the radiation of the light source, the power, the response speed, and the like, and the ultraviolet light source which is widely applied at present includes three types of ultraviolet lamps, lasers, and diodes, wherein the ultraviolet lamp is based on the principle that mercury vapor discharge generates ultraviolet radiation, the ultraviolet light source has a large power density and a large power range, and the emitted ultraviolet spectrum is mainly medium-wave ultraviolet light.
This patent chooses ultraviolet lamp as boats and ships ultraviolet light communication system's transmitting light source for use to combine frequency modulator control ultraviolet light source's power output, ultraviolet light source is ultraviolet lamp.
In at least one embodiment, the receiving end comprises: a filter for shielding a signal of an interference source;
the ultraviolet light signal receiver is used for converting the ultraviolet light signal into an electric signal;
the demodulation circuit is electrically connected with the ultraviolet light signal receiver and is used for demodulating the electric signal processed by the ultraviolet light signal receiver;
and the signal output device is electrically connected with the demodulation circuit and used for outputting the demodulated electric signal.
The receiving end also comprises an amplifying circuit which is electrically connected with the demodulating circuit and is used for amplifying the electric signal processed by the photomultiplier; the ultraviolet light signal receiver comprises an avalanche photodiode and a photomultiplier electrically connected with the avalanche photodiode.
Although the ozone layer of the earth's atmosphere absorbs a large amount of uv light, due to the economic activity of human beings, a variety of uv radiation sources are generated, which are the main interference signals of the ship uv communication system, and reasonable measures must be taken to filter the light sources. The optical filter is used for shielding an interference source, so that the signal receiving signal-to-noise ratio of the ultraviolet light communication system is improved.
The precision of the ultraviolet light receiver determines the precision of the ship ultraviolet light communication system to a great extent and is also a key component of the ultraviolet light communication system. When the ultraviolet light receiver is designed, a larger detection area and a higher receiving gain are adopted, and hardware devices such as an avalanche photodiode and a photomultiplier tube are used.
Briefly, the ultraviolet communication system uses an atmospheric channel to transmit data, and mainly includes an LED light source, a modulation circuit, a photomultiplier, an amplification circuit, an optical filter, a demodulation circuit, and the like.
As shown in fig. 2, the signal transmission model of the ultraviolet light communication system is relatively simple and consists of a transmitting end, a receiving end and a signal transmission link, and the channel model of the ultraviolet light communication system can be divided into a line-of-sight transmission model and a non-line-of-sight transmission model.
When the ultraviolet light source works, when a signal is transmitted, the modulation circuit modulates and transforms an electric signal generated by the signal input device in a specific modulation mode, and then the ultraviolet light source transmits modulation information along with an ultraviolet carrier wave through the transmitting end driving circuit; when receiving signals, the ultraviolet light signal receiver captures and collects ultraviolet light signals, photoelectric conversion is carried out on the ultraviolet light signals, the amplifying circuit amplifies electric signals and the like, and the demodulating circuit recovers original information and sends the information to the signal output device.
The ultraviolet light communication system of the invention has the following advantages:
1. non-line-of-sight transmission;
the traditional infrared laser communication is typical line-of-sight communication, complex operations such as target aiming, infrared laser capturing and the like are required in the communication process, non-line-of-sight transmission is the most obvious characteristic of an ultraviolet light communication technology, and different from the infrared laser communication technology, an ultraviolet light communication system medium is an atmospheric molecule, and ultraviolet light is captured by a signal receiving end in a form of an area instead of a certain light spot after being scattered by the atmospheric molecule and aerosol particles, so that the ultraviolet laser communication can realize non-line-of-sight signal transmission, can avoid various obstacles and is very wide in coverage.
2. The background noise is low;
as described above, the ozone layer of the earth atmosphere absorbs 99% or more of the ultraviolet rays from the earth, and therefore the ultraviolet ray content near the earth surface is very low, almost zero. Therefore, the background noise of the ultraviolet light communication system is very low and the signal-to-noise ratio is high no matter the signal is transmitted or received. In an ultraviolet light communication system, a signal detector with high sensitivity is adopted, and accurate transmission of information can be realized only by acquiring a small amount of ultraviolet light. At present, a signal acquisition device with a wider field of view is usually added to a signal detector device of an ultraviolet communication system, so that the precision of the ultraviolet communication system can be further improved.
3. The anti-interference capability is strong;
the ultraviolet light communication system is limited by the absorption and scattering action of atmospheric molecules and particles, and ultraviolet light is attenuated regularly, so that the signal transmission distance of the ultraviolet light communication system is relatively short. In the ultraviolet light communication system, the specific transmitting power can be set by judging the current communication distance and combining the law of power attenuation, so that the ultraviolet light communication system can cover a specific communication area, and cannot receive the current ultraviolet light signal outside the area, thereby improving the safety of the ultraviolet light communication system.
4. All-weather work;
with the continuous development of the ship radio communication technology, the frequency band resource of the radio signal is increasingly tense, and the adoption of the ultraviolet light communication does not occupy the radio frequency band resource, so that the all-weather 24-hour uninterrupted work can be realized.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. An ultraviolet light communication system for a ship, comprising:
the transmitting terminal is used for transmitting data and information to the receiving party;
the receiving end is used for receiving the information and data transmitted by the transmitting party;
the atmosphere channel of ultraviolet communication is used for transmitting information and data of a transmitting end and a receiving end;
wherein, the atmospheric transmittance of the system is calculated according to the following formula:
is provided with L0From a source of ultraviolet light to a targetDistance, RvIs the visible distance, lambda, of the current atmosphere0Is the wavelength of the ultraviolet light;
the transmitting power of the transmitting end is calculated according to the following formula:
let P0Initial power for ultraviolet light emission, ArIs the aperture size of the signal receiver, KeIs the atmospheric transmission attenuation coefficient.
2. The ultraviolet light communication system applied to the ship according to claim 1, wherein: the transmitting end includes: a signal input unit for inputting information;
the modulation circuit is electrically connected with the signal input device and is used for modulating the input information;
the ultraviolet light source is electrically connected with the modulation circuit and is used for sending out the modulated information along with the ultraviolet light;
and the driving circuit is used for driving the ultraviolet light source.
3. The ultraviolet light communication system applied to the ship according to claim 1 or 2, wherein: the receiving end includes: a filter for shielding a signal of an interference source;
the ultraviolet light signal receiver is used for converting the ultraviolet light signal into an electric signal;
the demodulation circuit is electrically connected with the ultraviolet light signal receiver and is used for demodulating the electric signal processed by the ultraviolet light signal receiver;
and the signal output device is electrically connected with the demodulation circuit and used for outputting the demodulated electric signal.
4. The ultraviolet light communication system applied to the ship according to claim 3, wherein: the receiving end also comprises an amplifying circuit which is electrically connected with the demodulating circuit and is used for amplifying the electric signal processed by the photomultiplier.
5. The ultraviolet light communication system applied to the ship according to claim 3, wherein: the ultraviolet light signal receiver comprises an avalanche photodiode and a photomultiplier electrically connected with the avalanche photodiode.
6. The ultraviolet light communication system applied to the ship according to claim 2, wherein: the ultraviolet light source is an ultraviolet lamp.
7. The ultraviolet light communication system applied to the ship according to claim 2, wherein: the transmitting end also comprises a frequency modulator electrically connected with the driving circuit and used for controlling the power of the ultraviolet light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011259279.7A CN112436890A (en) | 2020-11-12 | 2020-11-12 | Ultraviolet light communication system applied to ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011259279.7A CN112436890A (en) | 2020-11-12 | 2020-11-12 | Ultraviolet light communication system applied to ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112436890A true CN112436890A (en) | 2021-03-02 |
Family
ID=74700690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011259279.7A Pending CN112436890A (en) | 2020-11-12 | 2020-11-12 | Ultraviolet light communication system applied to ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112436890A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1921354A (en) * | 2006-09-20 | 2007-02-28 | 中国科学院上海光学精密机械研究所 | Ultra-violet optical communication system |
| CN107070835A (en) * | 2017-03-29 | 2017-08-18 | 广东科学技术职业学院 | Bidirectional photonic radio frequency ofdm system and its signal transacting implementation method of a kind of phase from locking from coherent detection |
| US20170317750A1 (en) * | 2012-01-09 | 2017-11-02 | Attochron, Llc | USPL-FSO Lasercom Point-to-Point and Point-to-Multipoint Optical Wireless Communication |
| CN111756441A (en) * | 2020-07-30 | 2020-10-09 | 江苏崛起通讯科技有限公司 | Short-distance ultraviolet light wireless communication system and modulation method thereof |
-
2020
- 2020-11-12 CN CN202011259279.7A patent/CN112436890A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1921354A (en) * | 2006-09-20 | 2007-02-28 | 中国科学院上海光学精密机械研究所 | Ultra-violet optical communication system |
| US20170317750A1 (en) * | 2012-01-09 | 2017-11-02 | Attochron, Llc | USPL-FSO Lasercom Point-to-Point and Point-to-Multipoint Optical Wireless Communication |
| CN107070835A (en) * | 2017-03-29 | 2017-08-18 | 广东科学技术职业学院 | Bidirectional photonic radio frequency ofdm system and its signal transacting implementation method of a kind of phase from locking from coherent detection |
| CN111756441A (en) * | 2020-07-30 | 2020-10-09 | 江苏崛起通讯科技有限公司 | Short-distance ultraviolet light wireless communication system and modulation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 吴清海: "船舶紫外光通信系统的设计与实现", 《舰船科学技术》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kaushal et al. | Underwater optical wireless communication | |
| Oubei et al. | Light based underwater wireless communications | |
| Al-Zhrani et al. | Underwater optical communications: A brief overview and recent developments | |
| US9154234B2 (en) | Extended range undersea communication system | |
| JP5967643B2 (en) | Underwater divergent light communication device | |
| CN102098112A (en) | Method and system for underwater short-distance data communication through light-emitting diode (LED) light source | |
| WO2005047871A2 (en) | Method and system for measuring optical properties of a medium using digital communication processing techniques | |
| CN103117796A (en) | Relay retransmission device and relay retransmission method for satellite radio frequency and optical fiber signal transmission data | |
| CN103095380A (en) | Underwater wireless optical communication device and method thereof | |
| CN114844575B (en) | Water-air cross-medium wireless two-way communication method | |
| EP4166988A1 (en) | Radar system, mobile device and radar detection method | |
| CN109586807A (en) | Sky-water means of communication and device | |
| CN106130595A (en) | A kind of marine ultrashort wave beyond-the-horizon communication device | |
| CN114710206B (en) | Shore-sea emergency communication method and system based on LED light source | |
| KR20180088384A (en) | Terahertz digital communication system and method based on polarization coding | |
| CN113708838A (en) | Speed-adjustable and distance-variable underwater blue-green light communication system | |
| CN110113110B (en) | Underwater visible light communication device | |
| CN107040316A (en) | A kind of inexpensive spatial coherence photoreceiver of multiple aperture and signal receiving demodulation method | |
| US8041224B2 (en) | Optical frequency division multiplexed communications over the horizon | |
| US6563462B1 (en) | Millimeter-wave camera for radiometric imaging and communications | |
| Li et al. | High speed RGB-based duobinary-encoded visible light communication system under the impact of turbulences | |
| CN112436890A (en) | Ultraviolet light communication system applied to ship | |
| CN211046937U (en) | Light-weight long-distance underwater L ED wireless optical communication transmission system | |
| Leccese et al. | State-of-the art and perspectives of underwater optical wireless communications | |
| CN111628825A (en) | Single-light-source full-duplex visible light communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210302 |