CN112822360B - Deep sea video shooting and wireless transmission integrated system - Google Patents
Deep sea video shooting and wireless transmission integrated system Download PDFInfo
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- CN112822360B CN112822360B CN202011629707.0A CN202011629707A CN112822360B CN 112822360 B CN112822360 B CN 112822360B CN 202011629707 A CN202011629707 A CN 202011629707A CN 112822360 B CN112822360 B CN 112822360B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
Abstract
The invention discloses a deep sea video shooting and wireless transmission integrated system, which comprises: an illumination device for providing an illumination source of a first wavelength; the image acquisition device is used for acquiring image information under the assistance of the illumination light source; the signal transmitting device is used for transmitting the image information to the signal receiving device by using the communication light source with the second wavelength; the signal receiving device is used for receiving the communication optical signal and outputting image information; the display device is used for displaying the image information; wherein the first wavelength is greater than the second wavelength. The deep sea video shooting and wireless transmission integrated system solves the problem of interference of lighting light by selecting a light source with a wavelength smaller than the illumination wavelength as a communication light source and arranging an interference filter in a communication receiver, and can solve the problems of deep sea video shooting and real-time transmission.
Description
Technical Field
The invention belongs to the field of underwater information transmission, and particularly relates to a deep sea video shooting and wireless transmission integrated system.
Background
Deep sea is a deep water area in the sea, and abundant biological and mineral resources are stored in the vast space. With the increasing shortage of land resources in recent years, exploration and development of deep sea are increased in various countries in the world. However, since extreme water pressure of several tens or even hundreds of mpa exists in deep sea, people cannot directly perform work, and deep sea work is often performed through mobile platforms such as a deep sea manned submersible vehicle (HOV), a remote operated unmanned vehicle (ROV), and an Autonomous Underwater Vehicle (AUV). Moreover, with the increase of operation difficulty, two or more mobile platforms are often required to work together to efficiently complete underwater operation tasks.
In the process of near-distance combined operation of a deep-sea mobile platform, because the precision of the traditional acoustic sensing method is limited, in order to improve the precision and the efficiency of the combined operation, the working area and the azimuth information of the combined operation equipment are generally obtained by an optical image sensing method of real-time video shooting, so that the efficiency of the combined operation is improved. In the process, video information is shared among the mobile platforms, information interaction is realized, and the information of the operation area and the operation process can be intuitively understood in all directions among all the operation platforms.
Because video information is often large in data capacity, how to transmit the large-capacity data information in real time is an important problem in engineering application. The traditional underwater data transmission mode mainly depends on wired communication and underwater acoustic communication. The wired communication utilizes optical fibers and cables to transmit communication data, cables need to be laid in advance, the cost is high, the maintenance is difficult, and the mobility of the mobile platform is greatly limited; the underwater acoustic communication uses acoustic waves as carriers to realize signal transmission, has strong maneuverability, is limited by acoustic wave bandwidth, multipath effect and underwater acoustic noise, has low communication speed and is difficult to meet the high-bandwidth transmission requirement of video data. On the other hand, the deep sea wireless optical communication using blue-green light waves as information carriers has the advantages of strong seawater penetration, high communication speed, strong maneuverability and the like, and can solve the problem of high-bandwidth wireless transmission in the process of combined operation of deep sea mobile platforms.
In practical application, in order to reduce the influence of the shaking of the mobile platform on the directional alignment between a transmitter and a receiver of a communication system, the deep-sea wireless optical communication equipment generally has a larger emergent angle for the transmitter and a larger receiving view field for the receiver; also, in order to reduce the crosstalk effect of seawater backscattering on the optical signals of the bidirectional transmission link, the communication system generally works in a half-duplex mode, see [ korean bushy, "research on underwater bidirectional wireless optical communication for deep sea applications", doctrine of university of chinese academy of sciences ", 2018 ]. However, due to the fact that the deep sea is painted with black, when deep sea video shooting is carried out, the deep sea image is often observed by means of artificial lighting. Because the wavelengths of the auxiliary light and the wireless optical communication light source usually belong to visible light bands, the auxiliary light is background noise for the wireless optical communication system, which can seriously affect the transmission performance of the communication system and even cause the interruption of an information link. On the other hand, although the emission light source in the wireless optical communication system can replace the function of auxiliary light to some extent to provide brightness for video shooting, due to the effect of the half-duplex communication mode, the stroboscopic of the communication emission light source can affect the quality of the shot picture. Therefore, how to solve the compatibility problem between the auxiliary light and the wireless optical communication system in video shooting is a major problem in the process of transmitting the deep sea video in real time by using the wireless optical communication method.
Aiming at the influence of deep sea lighting light on wireless optical communication, the method of video shooting and time-sharing transmission is generally adopted at present. Specifically, the time is divided into a plurality of time slots, and when the video is shot, the auxiliary light is turned on and the wireless optical communication equipment is turned off; when video data is transmitted, the wireless optical communication device is turned on, and the auxiliary light is turned off. Although the video shooting and wireless optical communication functions can be realized, the real-time performance of the time-sharing working video transmission is poor; and frequently turn on and off auxiliary light and wireless optical communication equipment, be unfavorable for the maintenance of equipment.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an integrated deep sea video shooting and wireless transmission system. The technical problem to be solved by the invention is realized by the following technical scheme:
a deep sea video shooting and wireless transmission integrated system comprises:
an illumination device for providing an illumination source of a first wavelength;
the image acquisition device is used for acquiring image information under the assistance of the illumination light source;
the signal transmitting device is used for transmitting the image information to the signal receiving device by using the communication light source with the second wavelength;
the signal receiving device is used for receiving the communication optical signal and outputting image information;
the display device is used for displaying the image information;
wherein the first wavelength is greater than the second wavelength.
In one embodiment, the signal receiving device includes a filtering unit, the filtering unit is an interferometric optical filter, and the central transmission wavelength of the interferometric optical filter is a second wavelength.
In one embodiment, the communication mode of the signal transmitting apparatus and the signal receiving apparatus is a half-duplex communication mode.
In a specific embodiment, the lighting device, the image capturing device, the signal sending device and the signal receiving device are integrated.
The invention has the beneficial effects that:
1. the deep sea video shooting and wireless transmission integrated system solves the problem of interference of lighting light by selecting a light source with a wavelength smaller than that of illumination as a communication light source and arranging an interference filter in a communication receiver, and can solve the problems of deep sea video shooting and real-time transmission.
2. According to the deep sea video shooting and wireless transmission integrated system, the illuminating device, the image acquisition device, the signal sending device and the signal receiving device are integrated, so that the size and the weight of deep sea equipment are reduced, and the deep sea video shooting and wireless transmission integrated system is convenient to popularize and apply.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a block diagram of a deep sea video shooting and wireless transmission integrated system provided by an embodiment of the invention;
fig. 2 is a schematic diagram in a specific example scenario provided by an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example one
Referring to fig. 1, fig. 1 is a block diagram of a deep sea video shooting and wireless transmission integrated system provided in an embodiment of the present invention, including:
an illumination device for providing an illumination source of a first wavelength;
the image acquisition device is used for acquiring image information under the assistance of the illumination light source;
the signal transmitting device is used for transmitting the image information to the signal receiving device by using the communication light source with the second wavelength;
the signal receiving device is used for receiving the communication optical signal and outputting image information;
the display device is used for displaying the image information;
wherein the first wavelength is greater than the second wavelength.
In one embodiment, the lighting device is an auxiliary light disposed in water or deep sea to illuminate the underwater area to provide sufficient illumination for video capture to enable a clearer video image to be captured. Generally, the main spectrum range of the lighting device is a blue-green band of 450 to 550nm, and a Light Emitting Diode (LED) is used as a Light source. Preferably, the illumination light source is an LED light source with a central wavelength of 470 nm.
The image acquisition device can be a deep sea camera, and video shooting is carried out through the deep sea camera, wherein the main response wave band of the deep sea camera is a visible light wave band.
After the image acquisition device acquires the image information or the video information, the image information or the video information needs to be transmitted to a target to be received through the signal transmission device, and the target to be received is restored to the original shot image information after receiving the signal of the signal transmission device through the signal receiving device.
In this embodiment, the communication light source uses a violet wavelength band with a central wavelength of 405nm, i.e., the signal transmitting device light source is an LED with a violet wavelength band, and the signal receiving device integrates an interferometric optical filter with high transmittance in the violet wavelength band and a photomultiplier tube (PMT) with high sensitivity in the violet wavelength band as photoelectric conversion devices.
Thus, on one hand, the influence of the lighting lamp light on communication is suppressed by the optical filtering method; on the other hand, the optical photosensitive device used for video shooting has low responsivity in a purple light wave band, so that the influence of stroboflash of a communication light source on video images can be reduced, and the spectrum wave band of the optical photosensitive device has good penetrating power in deep sea no matter the illumination light source or the communication light source, and the transmission distance of auxiliary illumination and wireless optical communication is favorably increased.
The restored original photographed image information is displayed by a display device such as a computer capable of providing a display function to provide a visual study, and a data transmission medium may be provided by an apparatus such as a switch for facilitating data transmission management.
In one embodiment, the signal receiving device includes a filtering unit, the filtering unit may be an interferometric optical filter and an absorptive optical filter, and preferably, the filtering unit in this embodiment is an interferometric optical filter, and a central transmission wavelength of the interferometric optical filter is a second wavelength, so as to have a better optical filtering effect.
Further, the emergent angle of the light beam of the signal sending device in the water is 60-65 degrees.
Further, the emergent angle of the light beam of the signal receiving device in water is 45-50 degrees.
In addition, the communication light source wavelength adopted by the embodiment is smaller than the illumination light source wavelength, because although the interference filter has a high optical filtering effect, the central transmission wavelength is related to the incident angle of the light wave, and the central transmission wavelength is shortened as the incident angle is larger, so that when the communication wavelength is shorter than the illumination wavelength, the communication device receiver can suppress the influence of the illumination light in a larger field of view, and the effective action range of the communication system is improved.
It is worth mentioning that, the application scene of this application mainly lies in deep sea and shoots, that is to say, need guarantee can also stably transmit communication signal in the deep sea under the condition of shooting clear image, and can transmit communication signal when shooting the image, this application is through auxiliary light source so that clear image picture can be gathered to image acquisition device, and distinguish communication wavelength and illumination wavelength, thereby can transmit communication signal simultaneously, when signal reception, in order to filter the interference of illumination light wave, adopt optical filtering to filter, thereby data transmission's degree of accuracy has been improved.
Preferably, the lighting device, the image acquisition device, the signal sending device and the signal receiving device are integrated. The illuminating device, the image acquisition device, the signal sending device and the signal receiving device are integrated together, so that the volume and the weight of deep sea equipment are reduced, and the popularization and the application are facilitated.
In one embodiment, the communication mode of the signal transmitting apparatus and the signal receiving apparatus is a half-duplex communication mode.
In a specific embodiment, the communication link rate between the signal transmitting apparatus and the signal receiving apparatus is 6.25Mbps to 31.25 Mbps.
Example two
This embodiment shows the scheme of the present invention by way of an example. Referring to fig. 2, fig. 2 is a schematic diagram of a specific example scenario provided by the embodiment of the present invention, and in the example, two identical terminals are included. The distance between the two terminals is 9 meters, and the water quality attenuation coefficient in the pool is about 0.4m-1。
Each terminal consists of a deep sea camera, a deep sea lamp, a transmitter, a receiver, a switch and a computer, wherein the computer is positioned above the water surface, and the rest part of the computer is positioned in the water. The parts in each terminal are connected by watertight connecting lines.
The role of each component in the terminal is as follows:
deep sea light: providing underwater illumination brightness. An LED is used as a light source, the central wavelength is 470nm, the full width at half maximum of a spectrum is 30nm, and the luminous power is about 25W;
a deep-sea camera: shooting an underwater video image, wherein the working waveband is in a visible light waveband, video data is output outwards in a TCP/IP protocol mode, and the code stream rate is between 3Mbps and 5 Mbps;
deep sea wireless optical communication module: the transmitter and the receiver adopt a transceiving separation structure and are connected through a watertight connecting line. The emission source adopts a purple light LED with the central wavelength of 405nm, the spectral range is 30nm, and the luminous power is about 1W; an interference type optical filter with the central transmission wavelength of 405nm and the transmission spectrum width of 30nm is integrated in the receiver, the transmittance of the optical filter in a transparent waveband is about 75%, and the transmittance in the other wavebands is less than 0.01%; the system adopts a half-duplex communication mode, and the link rate is adjustable in steps between 6.25Mbps and 31.25 Mbps; the external interface is a network structure, and data is transmitted by a TCP/IP protocol; the outgoing angle of the light beam of the transmitter in water is about 65 degrees; the field of view of the deep-sea wireless optical communication receiver in water is about 50 degrees.
The switch: the function of the switch is to connect the deep sea camera, the transmitter and the receiver and the computer, so that the computer can control, monitor and read the information in the transmitter, the receiver and the deep sea camera, and the image information shot by the deep sea camera can be transmitted by the transmitter.
A computer: controlling and monitoring the working states of modules such as a transmitter, a receiver, a deep sea camera and the like; and displaying the video information received by the receiver.
In the specific implementation process, the deep-sea wireless optical communication modules at two ends are opened, and the amplitude values of voltage signals after optical signal conversion monitored by the deep-sea wireless optical communication terminal 1# and the terminal 2# are 0.85V and 0.88V respectively; after the deep sea lighting lamps at two ends are turned on, the amplitude of the voltage signal after the terminal 1# and the terminal 2# monitor that the optical signal is converted is 0.89V and 0.92V respectively. This indicates that the lighting light has a very weak influence on the communication system.
Then, the deep sea cameras in the terminal 1# and the terminal 2# are opened, and at the moment, the video images shot by the deep sea camera 2# can be clearly seen in the computer 1 #; the video image shot by the deep sea camera 1# can be clearly seen in the computer 2 #. This shows that deep sea wireless optical communication module, deep sea lighting lamp light and deep sea camera can work simultaneously at this moment to the image information that camera shot in real time conveys.
Preferably, during video transmission, a parity check mode can be adopted to monitor the byte error rate of the deep sea wireless optical communication link during transmission, as shown in table 1. The statistical period for each set of data in the table was 20 minutes. Under the link, video information can still be smoothly transmitted.
Table 1: byte error rate statistics
The embodiment shows that the deep sea video shooting and real-time wireless transmission integrated method provided by the invention is feasible, can meet the requirement of short-distance operation in deep sea, has the characteristics of high video information timeliness, simple structure and low complexity, and is convenient to popularize and apply.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (2)
1. A deep sea video shooting and wireless transmission integrated system is characterized by comprising:
an illumination device for providing an illumination source of a first wavelength;
the image acquisition device is used for acquiring image information under the assistance of the illumination light source;
the signal receiving device comprises a filtering unit, the filtering unit is an interference type optical filter, and the central transmission wavelength of the interference type optical filter is the second wavelength;
the signal receiving device is used for receiving the communication optical signal and outputting image information;
the display device is used for displaying the image information;
wherein the first wavelength is greater than the second wavelength; the communication mode of the signal transmitting device and the signal receiving device is a half-duplex communication mode.
2. The deep sea video shooting and wireless transmission integrated system according to claim 1, characterized in that the lighting device, the image acquisition device, the signal transmitting device and the signal receiving device are integrated.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203243329U (en) * | 2013-05-08 | 2013-10-16 | 重庆工业职业技术学院 | Underwater short-distance communication device based on visible light |
| CN203279052U (en) * | 2013-05-09 | 2013-11-06 | 西安理工大学 | A wireless ultraviolet secret image transmitting apparatus |
| CN107528632A (en) * | 2016-06-16 | 2017-12-29 | 技旼电子株式会社 | The underwater double-direction radio image data communication system supported based on illumination diffusion |
| CN109058710A (en) * | 2018-10-25 | 2018-12-21 | 南京水动力信息科技有限公司 | Camera cradle head system under a kind of amphibious intelligent water |
| CN111211845A (en) * | 2019-12-31 | 2020-05-29 | 中国船舶重工集团公司第七一三研究所 | Underwater wireless optical communication and imaging detection integrated device |
| CN211406026U (en) * | 2020-02-28 | 2020-09-01 | 淮南师范学院 | Monitoring system with ultraviolet laser communication function |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60316178T2 (en) * | 2002-10-24 | 2008-06-05 | Nakagawa Laboratories, Inc. | COMMUNICATION DEVICE WITH ILLUMINATING LIGHT |
| JP5842100B2 (en) * | 2011-11-21 | 2016-01-13 | パナソニックＩｐマネジメント株式会社 | Lighting device for visible light communication and visible light communication system using the same |
| KR20130116439A (en) * | 2012-03-22 | 2013-10-24 | 영남대학교 산학협력단 | Apparatus and method for transceiving optical signal using multi-spectral optical array sources and carmera |
| JP2015128224A (en) * | 2013-12-27 | 2015-07-09 | キヤノン株式会社 | Image imaging system and control method therefor |
| CN108600461A (en) * | 2018-05-10 | 2018-09-28 | 维沃移动通信有限公司 | A kind of image collecting device and mobile terminal |
| KR102085859B1 (en) * | 2018-11-06 | 2020-03-06 | 주식회사 볼시스 | Optical communication system and method capable of monitoring underwater information in real time |
-
2020
- 2020-12-30 CN CN202011629707.0A patent/CN112822360B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203243329U (en) * | 2013-05-08 | 2013-10-16 | 重庆工业职业技术学院 | Underwater short-distance communication device based on visible light |
| CN203279052U (en) * | 2013-05-09 | 2013-11-06 | 西安理工大学 | A wireless ultraviolet secret image transmitting apparatus |
| CN107528632A (en) * | 2016-06-16 | 2017-12-29 | 技旼电子株式会社 | The underwater double-direction radio image data communication system supported based on illumination diffusion |
| CN109058710A (en) * | 2018-10-25 | 2018-12-21 | 南京水动力信息科技有限公司 | Camera cradle head system under a kind of amphibious intelligent water |
| CN111211845A (en) * | 2019-12-31 | 2020-05-29 | 中国船舶重工集团公司第七一三研究所 | Underwater wireless optical communication and imaging detection integrated device |
| CN211406026U (en) * | 2020-02-28 | 2020-09-01 | 淮南师范学院 | Monitoring system with ultraviolet laser communication function |
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