CN108199771A - A kind of visible light communication device - Google Patents
A kind of visible light communication device Download PDFInfo
- Publication number
- CN108199771A CN108199771A CN201810139582.XA CN201810139582A CN108199771A CN 108199771 A CN108199771 A CN 108199771A CN 201810139582 A CN201810139582 A CN 201810139582A CN 108199771 A CN108199771 A CN 108199771A
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- module
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- visible light
- light communication
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- 238000004891 communication Methods 0.000 title claims abstract description 41
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 23
- 239000010703 silicon Substances 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 230000003321 amplification Effects 0.000 claims abstract description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 14
- 239000004065 semiconductor Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 4
- 230000005622 photoelectricity Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000003287 optical Effects 0.000 description 7
- 230000000295 complement Effects 0.000 description 5
- 241000287532 Colaptes Species 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000051 modifying Effects 0.000 description 2
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000002452 interceptive Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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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
-
- 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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/502—LED transmitters
-
- 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
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
Abstract
The invention discloses a kind of visible light communication devices, belong to field of communication technology, including：The transmitting terminal of visible light communication and the receiving terminal of visible light communication, the two transmits signal by visible ray, the receiving terminal of visible light communication includes silicon photocell module, signal amplification module, digital demodulation signal module, the second CPU module and data outputting module, digital demodulation signal module, data outputting module are connected with the second CPU module 2, the transmitting terminal of visible light communication sends out visible ray and is received by silicon photocell module, is exported after signal amplifies, demodulates by data outputting module.The present invention in receiving terminal setting signal amplification module, signal demodulation module by carrying out data, and receive visible light signal using silicon photocell, performance and sensitivity are far all higher than photodiode, it will not make distorted signals, solves the problems, such as the coordinative composition of equipments that visible ray transmits signal, with the advantages that signal fidelity height, data transmission speed is very fast, and event of data loss is less.
Description
Technical field
The invention belongs to fields of communication technology, and in particular to a kind of visible light communication device.
Background technology
It can be seen that optical communication, is a kind of wireless communication technique, it is to be sent out using the objects such as fluorescent lamp or light emitting diode (LED)
Light and shade flash signal come realize information transmission the communication technology, it is seen that the frequency of light between 400THz (wavelength 780nm) extremely
Between 800THz (wavelength 375nm).During using common fluorescent lamp, its transmittability is 10kbit/s.During using LED light,
500Mbit/s can then be reached.Transmission range can then reach 1-2 kilometers.Its maximum characteristic is can to combine solid-state lighting
Technology.It can be seen that optical communication can be applied to illumination online, visible ray program request television services, visible ray novel radio broadcast, it is visible
Light is accurately positioned the fields of grade.
Invention content
According to more than the deficiencies in the prior art, the technical problems to be solved by the invention are to propose a kind of visible light communication dress
It puts, by carrying out data, and receive using silicon photocell visible in receiving terminal setting signal amplification module, signal demodulation module
Optical signal, performance and sensitivity far all higher than photodiode, will not make distorted signals, solve visible ray and transmit setting for signal
Standby corresponding problem has the advantages that signal fidelity is high, and data transmission speed is very fast, and event of data loss is less.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of visible light communication device, including：
The transmitting terminal of visible light communication and the receiving terminal of visible light communication, the two transmit signal by visible ray, it is seen that optic communication connects
Receiving end includes silicon photocell module, signal amplification module, digital demodulation signal module, the second CPU module and data outputting module,
LED drive module, silicon photocell module, signal amplification module and digital signal demodulation module are sequentially connected transmission signal, number
Signal demodulation module, data outputting module are connected with the second CPU module, it is seen that the transmitting terminal of optic communication sends out visible ray by silicon light
Battery module receives, and is exported after signal amplifies, demodulates by data outputting module.
In above device, the transmitting terminal of the visible light communication include the first CPU module of connection data storage module and
LED drive module, LED drive module send out visible light signal and give silicon photocell module.The LED drive module connection first
CPU module：First CPU module output digit signals give optocoupler U1, optocoupler U1 other ends ground connection, and signal input part is gone here and there with resistance R2
Couple into optocoupler U1, optocoupler U1 output termination Vcc power supplys, the other end is connected with resistance R1 accesses metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1 one end
Ground connection, another terminating load R4 connect with LED.Switching Power Supply is equipped in the visible light communication device, respectively to the first CPU moulds
Block and the power supply of the second CPU module.The Switching Power Supply connects 220V alternating currents, output 12V DC electricity.
Present invention has the advantages that:1. present apparatus data transmission speed is very fast, and event of data loss is less.2. the present apparatus
Signal is sent by LED, data can be transmitted and carry out room lighting.3. the present apparatus is simple in structure, easy to implement, it is easy to
It safeguards.
Description of the drawings
The content expressed by this specification attached drawing and the label in figure are briefly described below：
Fig. 1 is the structure diagram of the visible light communication device of the specific embodiment of the present invention.
Fig. 2 is the circuit diagram of the LED drive module of the specific embodiment of the present invention.
Specific embodiment
Below against attached drawing, by the description of the embodiment, each component that the specific embodiment of the present invention is for example involved
Shape, construction, the mutual alignment and connection relation between each section, the effect of each section and operation principle, manufacturing process and
Operate with method etc., is described in further detail, to help those skilled in the art to inventive concept of the invention, technology
Scheme has more complete, accurate and deep understanding.
A kind of visible light communication device, as shown in Figure 1, including：The transmitting terminal of visible light communication and connecing for visible light communication
Receiving end, the two transmit signal by visible ray.For the data that needs are sent, binary system can be transcoded into the prior art
This binary data is inputted into the first CPU module, is encoded into digital signal by data, with forming high frequency after carrier modulation
Square wave is exported to LED drive module, and LED is made to send out light and shade flash signal, with this transmission data.Since the data of transmission all turn
Optical signal is turned to, need the sensor of receiving terminal that can receive and exports corresponding signal, the present invention uses silicon photocell mould thus
Block is as sensor, and the signal amplification module for being followed by being equipped with high frequency small-signal amplifier is amplified, the optical signal that will be received
Be again converted to digital signal and be sent into receive side controller (the second CPU module) and be demodulated reduction original signal, and by its
Binary data is converted to, then can read out the data of transmitting terminal transmission.
The receiving terminal of visible light communication includes silicon photocell module, signal amplification module, digital demodulation signal module, second
CPU module and data outputting module, LED drive module, silicon photocell module, signal amplification module and digital signal demodulation module
Transmission signal is sequentially connected, digital demodulation signal module, data outputting module are connected with the second CPU module, it is seen that optic communication
Transmitting terminal sends out visible ray and is received by silicon photocell module, is exported after signal amplifies, demodulates by data outputting module.It can be seen that
The transmitting terminal of optic communication includes the data storage module and LED drive module of the first CPU module of connection, and LED drive module is sent out
Visible light signal gives silicon photocell module.
As shown in Fig. 2, LED drive module connects the first CPU module, the first CPU module output digit signals give optocoupler U1,
The optocoupler U1 other ends are grounded, and signal input part is connected with resistance R2 accesses optocoupler U1, and optocoupler U1 output termination Vcc power supplys are another
Connect access metal-oxide-semiconductor Q1 with resistance R1 at end, and metal-oxide-semiconductor Q1 one end ground connection, another terminating load R4 connects with LED.
For the flicker frequency of LED, that is, the frequency of the high frequency square wave sent, due to and there is no it is limited standard text
Part, therefore suitable frequency can be voluntarily selected, it selects frequency higher in the case where transmission data will not be distorted, can obtain
Transmission rate also can be higher.LED drive module is used as plus an optocoupler on the basis of common LED driving circuit and opens
The advantages that powered-down road uses, and optocoupler has the operation is stable, contactless, and service life is long, and efficiency of transmission is high, is very suitable for as control
The control element of LED flickers processed.The present invention selects high frequency optocoupler 6N137 as control optocoupler.There are other models in the market
High frequency optocoupler can select on demand.
Silicon photocell mould silicon photocell in the block is a kind of semiconductor devices for directly converting optical energy into electric energy.Its core
Center portion point is the PN junction of a large area.The PN junction area of silicon photocell is more much bigger than the PN junction of diode, so by light
According to when the electromotive force that generates and electric current it is also much bigger.Therefore signal receiving end uses silicon photocell as photosensitive sensor, performance
With sensitivity far above photodiode, complete signal can be preferably received, distorted signals will not be made.It is followed by amplification electricity
Using high frequency metal-oxide-semiconductor, that the present invention selects is IR2013 on road (be located at signal amplification module in), to prevent external light source from interfering,
It receives the second CPU module and adds in comparison system, eliminate data error, obtain data more complete, reduce mistake.
To prevent transmission data from mistake or byte loss occur, the data that transmitting terminal is sent all are sent in blocks,
Every group of binary data is all respectively provided with guidance code, user code, user's radix-minus-one complement, numeric data code and data radix-minus-one complement, finally with stopping
Position, stop position play buffer action, and wherein the radix-minus-one complement of numeric data code is for the error correction to data.Due to having environment light source during data transmission
It is interfered, data transmission can be caused to malfunction, to prevent this situation, will to detect current environment bright before present apparatus operation
Degree adjusts receiving terminal digital signal reference value, while the signal amplification module of receiving terminal uses differential electrical according to ambient brightness
Further eliminate interference in road.
Optical signalling is received to guarantee stabilization, and reduces environment light source interference, optics is installed on silicon photocell
Antenna used here as Fresnel Lenses, there is enhancing signal and anti-interference function.Switching Power Supply is equipped in visible light communication device
The first CPU module and the power supply of the second CPU module are connected respectively, and device additional power source 220V alternating currents use switch power module
It is made to be depressurized to 12V DC electricity to use for other modules.
Present apparatus workflow is described below：After the power is turned on, the first CPU module is by the data in data memory module for the present apparatus
It reads, according to used data encoding rule, data is sent by byte packet, every group of binary data is all respectively provided with and draws
Leading code, user code, user's radix-minus-one complement, numeric data code and data radix-minus-one complement, finally with stop position；It is exported after modulation to LED drive module,
LED is made to generate high-frequency signal, output is received to signal amplification module, then export to digital demodulation signal by silicon photocell module
Module exports to the second CPU module after demodulation, is handled the data of input by the second CPU module, is output to data output
Obtained data are shown or played back by module.So constantly from the first CPU module with sending data to the second CPU module.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that present invention specific implementation is not by aforesaid way
Limitation, as long as employ the inventive concept and technical scheme of the present invention progress various unsubstantialities improvement or without changing
Other occasions are directly applied to by the design of the present invention and technical solution, within protection scope of the present invention.This hair
Bright protection domain should be determined by the scope of protection defined in the claims.
Claims (5)
1. a kind of visible light communication device, which is characterized in that including：The reception of the transmitting terminal and visible light communication of visible light communication
End, the two transmit signal by visible ray, it is seen that the receiving terminal of optic communication includes silicon photocell module, signal amplification module, number
Word signal demodulation module, the second CPU module and data outputting module, LED drive module, silicon photocell module, signal amplification mould
Block and digital signal demodulation module are sequentially connected transmission signal, digital demodulation signal module, data outputting module and the 2nd CPU moulds
Block is connected, it is seen that the transmitting terminal of optic communication sends out visible ray and received by silicon photocell module, by counting after signal amplifies, demodulates
It is exported according to output module.
2. visible light communication device according to claim 1, which is characterized in that the transmitting terminal of the visible light communication includes
The data storage module and LED drive module of the first CPU module are connected, LED drive module sends out visible light signal and gives silicon photoelectricity
Pond module.
3. visible light communication device according to claim 2, which is characterized in that the LED drive module connects the first CPU
Module, the first CPU module output digit signals give optocoupler U1, optocoupler U1 other ends ground connection, and signal input part is connected with resistance R2
Optocoupler U1 is accessed, optocoupler U1 output termination Vcc power supplys, the other end is connected with resistance R1 accesses metal-oxide-semiconductor Q1, and metal-oxide-semiconductor Q1 mono- is terminated
Ground, another terminating load R4 connect with LED.
4. visible light communication device according to claim 1, which is characterized in that be equipped with and open in the visible light communication device
Powered-down source powers respectively to the first CPU module and the second CPU module.
5. visible light communication device according to claim 4, which is characterized in that the Switching Power Supply connects 220V alternating currents,
Export 12V DC electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810139582.XA CN108199771A (en) | 2018-02-11 | 2018-02-11 | A kind of visible light communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810139582.XA CN108199771A (en) | 2018-02-11 | 2018-02-11 | A kind of visible light communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108199771A true CN108199771A (en) | 2018-06-22 |
Family
ID=62593164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810139582.XA Pending CN108199771A (en) | 2018-02-11 | 2018-02-11 | A kind of visible light communication device |
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| Country | Link |
|---|---|
| CN (1) | CN108199771A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061786A (en) * | 2019-04-09 | 2019-07-26 | 江苏东海半导体科技有限公司 | A kind of IR signal reception processing circuit module |
| CN111565489A (en) * | 2020-05-28 | 2020-08-21 | 宁波工程学院 | LED drive circuit with independently controllable illumination and visible light communication |
-
2018
- 2018-02-11 CN CN201810139582.XA patent/CN108199771A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061786A (en) * | 2019-04-09 | 2019-07-26 | 江苏东海半导体科技有限公司 | A kind of IR signal reception processing circuit module |
| CN110061786B (en) * | 2019-04-09 | 2021-10-22 | 江苏东海半导体科技有限公司 | Infrared signal receiving and processing circuit module |
| CN111565489A (en) * | 2020-05-28 | 2020-08-21 | 宁波工程学院 | LED drive circuit with independently controllable illumination and visible light communication |
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