CN111064511B - Visible light communication video telephone - Google Patents
Visible light communication video telephone Download PDFInfo
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- CN111064511B CN111064511B CN201911201123.0A CN201911201123A CN111064511B CN 111064511 B CN111064511 B CN 111064511B CN 201911201123 A CN201911201123 A CN 201911201123A CN 111064511 B CN111064511 B CN 111064511B
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- video telephone
- module
- circuit
- visible light
- power supply
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/142—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
Abstract
A visible light communication video telephone, the coating film receiving lens is set up in the upper portion of PD receiver, the narrow band filter is set up in the upper portion of transmitting LED die set; the PD receiver is connected with the digital signal modulation and demodulation processing circuit through the preposed transimpedance amplifier and the main amplifier in sequence, the digital signal modulation and demodulation processing circuit is connected with the bias circuit and the emitting LED module through the filter circuit in sequence, and the digital signal modulation and demodulation processing circuit is also connected with the video telephone module through the hardmac network interface circuit; the adapter is connected with the system power supply module, the system power supply module is connected with the polymer lithium battery, and the adapter is respectively connected with the preposed transimpedance amplifier, the main amplifier, the hard core network interface circuit, the digital signal modulation and demodulation processing circuit, the filter circuit and the bias circuit through the system power supply module. The video telephone has various functions and reasonable structure, and can meet various requirements in practical application.
Description
Technical Field
The invention belongs to the technical field of visible light communication, and particularly relates to a visible light communication video telephone.
Background
The visible light communication technology is to transmit information by means of high speed light and shade flashing signal from fluorescent lamp, LED, etc. the high speed Internet wire device is connected to lighting device and may be used after inserting power plug. The system made by the technology can cover the range of indoor lighting, and the computer does not need to be connected by wires, so the system has wide development prospect. The existing video telephone has simple functions, cannot be applied to the visible light communication technology, and further cannot effectively meet various application requirements in a visible light communication system.
Disclosure of Invention
In view of the problems in the prior art, the invention provides a visible light communication video telephone which has various functions, is suitable for a visible light communication system, and can effectively meet various application requirements in the visible light communication system.
The invention provides a visible light communication video telephone, which comprises a coated receiving lens, a narrow-band filter, an emitting LED module, a PD receiver, a preposed transimpedance amplifier, a main amplifier, a digital signal modulation and demodulation processing circuit, a filter circuit, a bias circuit, a hardmac network interface circuit, a video telephone module, an adapter and a system power supply module, wherein the coated receiving lens is used for receiving a video signal;
the film coating receiving lens is arranged on the upper part of the PD receiver, and the narrow-band filter is arranged on the upper part of the transmitting LED module; the PD receiver is connected with the digital signal modulation and demodulation processing circuit through the pre-transimpedance amplifier and the main amplifier in sequence, the digital signal modulation and demodulation processing circuit is connected with the bias circuit and the emitting LED module through the filter circuit in sequence, and the digital signal modulation and demodulation processing circuit is also connected with the video telephone module through the hardmac network interface circuit; the adapter is respectively connected with the preposed transimpedance amplifier, the main amplifier, the hard core network interface circuit, the digital signal modulation and demodulation processing circuit, the filter circuit, the bias circuit and the PD receiver through the system power supply module.
Furthermore, in order to realize reliable communication in a mobile state, the mobile terminal further comprises a lithium battery module; the lithium battery module is connected with the system power supply module.
The telephone shell is formed by buckling and connecting a front video telephone shell and a rear video telephone shell;
the video telephone module is arranged on a front shell of the video telephone, and the telephone handle is connected with the video telephone module through a cable penetrating into the telephone shell;
the upper part of the video telephone rear shell is provided with a signal output port and a signal input port at left and right intervals; a transparent antenna fixing plate is arranged below the signal output port and the signal input port in the video telephone rear shell in a fitting manner, and the narrow-band optical filter and the coated receiving lens are arranged at the lower part of the transparent antenna fixing plate in a fitting manner corresponding to the signal output port and the signal input port respectively; the transmitting LED module and the PD receiver are correspondingly arranged at the lower parts of the narrow-band filter and the coated receiving lens respectively;
the preposed transimpedance amplifier, the main amplifier, the bias circuit, the filter circuit, the digital signal modulation and demodulation processing circuit and the hard core network interface circuit are all arranged on a visible light signal processing board, and the visible light signal processing board is arranged below the transmitting LED module and the PD receiver; the lithium battery module is arranged below the visible light signal processing board; the system power supply module is arranged on the right side of the lithium battery module, and one side of the system power supply module, which is close to the video telephone rear shell, is respectively connected with a charging indicator lamp, a voltage under-voltage indicator lamp and a power switch; the video telephone shell comprises a video telephone shell, and is characterized in that a charging indicator lamp mounting hole, a voltage under-voltage indicator lamp mounting hole, an adapter wire passing hole and a power switch mounting hole are respectively formed in a right end plate of the video telephone shell, the charging indicator lamp mounting hole, the voltage under-voltage indicator lamp mounting hole and the power switch mounting hole are respectively arranged corresponding to the charging indicator lamp, the voltage under-voltage indicator lamp and the power switch, and a cable connected with the adapter is arranged in the adapter wire passing hole in a penetrating mode.
Preferably, the transparent antenna fixing plate is made of an adhesive-backed acrylic plate.
Further, the visible light signal processing board is connected with a video telephone rear shell through a fixing screw A; the system power supply module is connected with the video telephone rear shell through a fixing screw B.
Preferably, the lithium battery module is a polymer lithium battery.
The invention changes the traditional networking mode of the video telephone through the network cable and WIFI into the networking mode through wireless optical communication, so that the video telephone can carry out network communication without depending on electromagnetic waves in a mobile state, the working limitation of the video telephone is changed, the video telephone can carry out network connection in a bright place without being bound by the interface point of the network cable, and the use is convenient. Meanwhile, the original functions of the video telephone are reserved, and voice and video communication, multi-person meeting and the like can be carried out. The lithium battery module is added in the video telephone, so that reliable power supply in a mobile state can be guaranteed. The invention can be comprehensively applied to the application field of the traditional video telephone, such as telephone conferences, enterprise internal scheduling command production, remote training and the like, is different from other radio wave mobile video telephones, can carry out mobile audio and video communication in electromagnetic silence sensitive areas and electromagnetic blind areas, has strong confidentiality, is particularly suitable for electromagnetic blind areas and electromagnetic sensitive areas of hospitals, caverns, command posts, nuclear power stations and the like, and can realize mobile wireless communication in the environment where radio waves are forbidden.
Drawings
FIG. 1 is a schematic block diagram of the circuit of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
In the figure: 1. telephone handle, 2, video phone front shell, 3, transparent antenna fixed plate, 4, narrowband optical filter, 5, coating film receiving lens, 8, PD receiver, 9, set screw A, 10, transmission LED module, 11, signal output port, 12, signal input port, 13, video phone backshell, 14, visible light signal processing board, 15, charge indicator lamp mounting hole, 16, the undervoltage indicator lamp mounting hole of voltage, 17, the adapter crosses the line hole, 18, switch mounting hole, 19, system power module, 20, set screw B, 21, lithium cell module.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1 and fig. 2, a visible light communication videophone includes a coated receiving lens 5, a narrowband filter 4, an emitting LED module 10, a PD receiver 8, a pre-transimpedance amplifier, a main amplifier, a digital signal modulation and demodulation processing circuit, a filter circuit, a bias circuit, a hardnet network interface circuit, a videophone module, an adapter, and a system power supply module 19;
preferably, the adapter uses wide voltage supply AC100V-240V to satisfy the use of videophones in different regions and different locations.
The coated receiving lens 5 is arranged at the upper part of the PD receiver 8, the coated receiving lens 5 not only has the function of an optical lens, but also has the function of a narrow-band filter, and the narrow-band filter 4 is arranged at the upper part of the transmitting LED module 10; the PD receiver 8 is connected with the digital signal modulation and demodulation processing circuit through the pre-transimpedance amplifier and the main amplifier in sequence, the digital signal modulation and demodulation processing circuit is connected with the bias circuit and the emitting LED module 10 through the filter circuit in sequence, and the digital signal modulation and demodulation processing circuit is also connected with the video telephone module through the hardmac network interface circuit; the adapter is respectively connected with the preposed transimpedance amplifier, the main amplifier, the hard core network interface circuit, the digital signal modulation and demodulation processing circuit, the filter circuit, the bias circuit and the PD receiver 8 through a system power supply module 19.
Preferably, the emission LED module 10 adopts an infrared lamp bead with a wavelength of 810nm, the lamp bead has small heat productivity, the communication bandwidth is high, the use requirement of the system is met, a red explosion phenomenon can occur after the near-infrared lamp bead is lightened, the visible light wave band is 360nm-780nm wave band, the visible light wave band is filtered through a narrow-band light filter, no influence is generated on people when the emission LED module is used, DC2.8V is used for loading a bias module of a video signal to drive the LED lamp bead, the power is reduced, the heat productivity is reduced, and the video information is sent to a free space for information transmission.
The PD receiver 8 receives a downlink optical signal sent by the visible light communication lamp, converts the optical signal into a weak current signal, and the current signal enters a first-stage amplification circuit, which is a pre-transimpedance amplifier, and the transimpedance amplifier mainly functions to convert the weak current signal into a voltage signal and amplify the signal with a certain intensity and low noise; the micro voltage signal is further amplified by a second-stage operational amplifier, a second-stage amplifying circuit is a main amplifier, and the millivolt-level voltage signal is amplified to a volt level to meet the requirement of optical signal transmission; the amplified optical signal is input to the visible light communication processing module 14, the signal is filtered and amplified again and then transmitted to the signal processing unit for decoding and modulation, the TCP/IP protocol is sent to the video telephone to complete one-time information reception, and the communication mode is changed by using the visible light communication technology by means of the original video telephone function, so that a wider application approach is provided for the video telephone.
Further, in order to ensure reliable power supply in a mobile state, the mobile terminal further comprises a lithium battery module 21; the lithium battery module 21 is connected to the system power supply module 19. Preferably, the power supply voltage of the lithium battery module 21 is 12V. The power supply of the lithium battery module 21 belongs to emergency power supply, the adapter is used for supplying power to the video telephone when being connected, meanwhile, the lithium battery module 21 is charged, the adapter is connected to the system power supply module 19, and the charging and discharging of the lithium battery module 21 are controlled through the power supply module 19.
The telephone comprises a telephone shell and a telephone handle 1 positioned outside the telephone shell, wherein the telephone shell is formed by buckling and connecting a video telephone front shell 2 and a video telephone rear shell 13;
the video telephone module is arranged on a video telephone front shell 2, and the telephone handle 1 is connected with the video telephone module through a cable penetrating into the telephone shell;
the upper part of the video telephone rear shell 13 is provided with a signal output port 11 and a signal input port 12 at left and right intervals; a transparent antenna fixing plate 3 is arranged below the signal output port 11 and the signal input port 12 in the video telephone rear shell 13 in a fitting manner, and the narrowband optical filter 4 and the coated receiving lens 5 are respectively arranged at the lower part of the transparent antenna fixing plate 3 in a fitting manner corresponding to the signal output port 11 and the signal input port 12; the emitting LED module 10 and the PD receiver 8 are correspondingly arranged at the lower parts of the narrow-band filter 4 and the coated receiving lens 5 respectively;
the pre-transimpedance amplifier, the main amplifier, the bias circuit, the filter circuit, the digital signal modulation and demodulation processing circuit and the hard core network interface circuit are all arranged on a visible light signal processing board 14, and the visible light signal processing board 14 is arranged below the transmitting LED module 10 and the PD receiver 8; the lithium battery module 21 is arranged below the visible light signal processing board 14; the system power supply module 19 is arranged on the right side of the lithium battery module 21, and one side of the system power supply module 19 close to the video telephone rear shell 13 is respectively connected with a charging indicator lamp, a voltage under-voltage indicator lamp and a power switch; a charging indicator lamp mounting hole 15, a voltage under-voltage indicator lamp mounting hole 16, an adapter wire passing hole 17 and a power switch mounting hole 18 are respectively formed in the right end plate of the video telephone rear shell 13, the charging indicator lamp mounting hole 15, the voltage under-voltage indicator lamp mounting hole 16 and the power switch mounting hole 18 are respectively arranged corresponding to the charging indicator lamp, the voltage under-voltage indicator lamp and the power switch, and a cable connected with the adapter penetrates through the adapter wire passing hole 17. The charging indicator light and the voltage under-voltage indicator light can respectively display the charging and under-voltage states of the lithium battery module 21.
The transparent antenna fixing plate 3 is made of an adhesive-backed acrylic plate.
The visible light signal processing board 14 is connected with the video telephone rear shell 13 through a fixing screw A9; the system power supply module 19 is connected to the videophone back case 13 by a set screw B20.
The lithium battery module 21 is a polymer lithium battery.
When the system works, the visible light communication video telephone is placed in a room provided with the visible light communication lamp, is connected with the adapter, is powered by the AC220V, is in a standby state, can be moved to a place needing to be used when a multi-person video conference or other purposes are temporarily needed, is not limited by a power line and a network cable, and can be used for audio and video communication in a moving state in a light place.
Claims (6)
1. A visible light communication video telephone is characterized by comprising a coated receiving lens (5), a narrow-band filter (4), an emitting LED module (10), a PD receiver (8), a pre-transimpedance amplifier, a main amplifier, a digital signal modulation and demodulation processing circuit, a filter circuit, a bias circuit, a hardmac network interface circuit, a video telephone module, an adapter and a system power supply module (19);
the film coating receiving lens (5) is arranged on the upper part of the PD receiver (8), and the narrow-band filter (4) is arranged on the upper part of the transmitting LED module (10); the PD receiver (8) is connected with the digital signal modulation and demodulation processing circuit through the pre-transimpedance amplifier and the main amplifier in sequence, the digital signal modulation and demodulation processing circuit is connected with the bias circuit and the emission LED module (10) through the filter circuit in sequence, and the digital signal modulation and demodulation processing circuit is also connected with the video telephone module through the hardmac network interface circuit; the adapter is respectively connected with the preposed transimpedance amplifier, the main amplifier, the hard core network interface circuit, the digital signal modulation and demodulation processing circuit, the filter circuit, the bias circuit and the PD receiver (8) through a system power supply module (19).
2. The videophone of claim 1, further comprising a lithium battery module (21); the lithium battery module (21) is connected with the system power supply module (19).
3. The videophone for visible light communication according to claim 1 or 2, characterized by further comprising a phone housing and a phone handle (1) located outside the phone housing, said phone housing being formed by snap-fit connection of a videophone front shell (2) and a videophone back shell (13);
the video telephone module is arranged on a video telephone front shell (2), and the telephone handle (1) is connected with the video telephone module through a cable penetrating into the telephone shell;
the upper part of the video telephone rear shell (13) is provided with a signal output port (11) and a signal input port (12) at left and right intervals; a transparent antenna fixing plate (3) is arranged below the signal output port (11) and the signal input port (12) in the video telephone rear shell (13) in a bonding mode, and the narrow-band optical filter (4) and the coated receiving lens (5) are arranged on the lower portion of the transparent antenna fixing plate (3) in a bonding mode corresponding to the signal output port (11) and the signal input port (12) respectively; the emission LED module (10) and the PD receiver (8) are correspondingly arranged at the lower parts of the narrow-band filter (4) and the coated receiving lens (5) in a laminating manner respectively;
the pre-transimpedance amplifier, the main amplifier, the bias circuit, the filter circuit, the digital signal modulation and demodulation processing circuit and the hard core network interface circuit are all arranged on a visible light signal processing board (14), and the visible light signal processing board (14) is arranged below the transmitting LED module (10) and the PD receiver (8); the lithium battery module (21) is arranged below the visible light signal processing board (14); the system power supply module (19) is arranged on the right side of the lithium battery module (21), and one side, close to the video telephone rear shell (13), of the system power supply module (19) is respectively connected with a charging indicator lamp, a voltage under-voltage indicator lamp and a power switch; the video telephone line-crossing structure is characterized in that a charging indicator lamp mounting hole (15), a voltage under-voltage indicator lamp mounting hole (16), an adapter line-crossing hole (17) and a power switch mounting hole (18) are respectively formed in a right side end plate of a video telephone rear shell (13), the charging indicator lamp mounting hole (15), the voltage under-voltage indicator lamp mounting hole (16) and the power switch mounting hole (18) are respectively arranged corresponding to a charging indicator lamp, a voltage under-voltage indicator lamp and a power switch, and a cable connected with the adapter is arranged in the adapter line-crossing hole (17) in a penetrating mode.
4. A videophone for visible light communication according to claim 3, characterized in that said transparent antenna fixing plate (3) is made of an adhesive backed acrylic plate.
5. The videophone according to claim 4, characterized in that said visible light signal processing board (14) is connected to the videophone back shell (13) by means of a set screw A (9); the system power supply module (19) is connected with the video telephone rear shell (13) through a fixing screw B (20).
6. A visual communication videophone according to claim 5, characterised in that said lithium battery module (21) is a polymer lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201123.0A CN111064511B (en) | 2019-11-29 | 2019-11-29 | Visible light communication video telephone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201123.0A CN111064511B (en) | 2019-11-29 | 2019-11-29 | Visible light communication video telephone |
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| Publication Number | Publication Date |
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| CN111064511A CN111064511A (en) | 2020-04-24 |
| CN111064511B true CN111064511B (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911201123.0A Active CN111064511B (en) | 2019-11-29 | 2019-11-29 | Visible light communication video telephone |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801473A (en) * | 2012-08-06 | 2012-11-28 | 南京邮电大学 | Visible light video communication system based on digital signal processing |
| CN103684597A (en) * | 2013-11-19 | 2014-03-26 | 北京邮电大学 | FPGA-based visible light video communication system and method |
| CN103825656A (en) * | 2013-12-10 | 2014-05-28 | 上海航天测控通信研究所 | Visible light communication system based on TCP/IP and method |
| WO2014206130A1 (en) * | 2013-06-26 | 2014-12-31 | 上海无线通信研究中心 | Visible light energy-carrying communication system and method |
| 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 |
| CN105898250A (en) * | 2014-12-23 | 2016-08-24 | 中国人民解放军装甲兵工程学院 | Optical information field module for indoor wireless optical communication |
-
2019
- 2019-11-29 CN CN201911201123.0A patent/CN111064511B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801473A (en) * | 2012-08-06 | 2012-11-28 | 南京邮电大学 | Visible light video communication system based on digital signal processing |
| WO2014206130A1 (en) * | 2013-06-26 | 2014-12-31 | 上海无线通信研究中心 | Visible light energy-carrying communication system and method |
| CN103684597A (en) * | 2013-11-19 | 2014-03-26 | 北京邮电大学 | FPGA-based visible light video communication system and method |
| CN103825656A (en) * | 2013-12-10 | 2014-05-28 | 上海航天测控通信研究所 | Visible light communication system based on TCP/IP and method |
| CN105898250A (en) * | 2014-12-23 | 2016-08-24 | 中国人民解放军装甲兵工程学院 | Optical information field module for indoor wireless optical communication |
| 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 |
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| CN111064511A (en) | 2020-04-24 |
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