CN104184519A - Visible light wireless communication system with self-sufficient energy - Google Patents

Visible light wireless communication system with self-sufficient energy Download PDF

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Publication number
CN104184519A
CN104184519A CN201410424782.1A CN201410424782A CN104184519A CN 104184519 A CN104184519 A CN 104184519A CN 201410424782 A CN201410424782 A CN 201410424782A CN 104184519 A CN104184519 A CN 104184519A
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signal
filter circuit
component
data storage
light source
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CN201410424782.1A
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CN104184519B (en
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陈雄斌
郭俊清
唐丹颖
李洪磊
陈弘达
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Institute of Semiconductors of CAS
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Institute of Semiconductors of CAS
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Abstract

The invention discloses a visible light wireless communication system with self-sufficient energy. The system comprises a computer, a signal transmission modulation module, an LED light source, a silicon photocell, a first filter circuit, a data storage unit, a second filter circuit, an amplification demodulation circuit and a terminal device. The computer outputs transmission signals, the signal transmission modulation module is used for loading the transmission signals to the LED light source, and the LED light source sends variable light intensity signals. The silicon photocell receives the variable light intensity signals and converts the variable light intensity signals into corresponding voltage signals. The first filter circuit is used for filtering out alternating components in the signals and the second filter circuit is used for filtering out direct components in the signals. The direct components are used for supplying power to the data storage unit and the amplification demodulation circuit. The alternating components are demodulated through the amplification demodulation circuit and then restore original signals. The terminal device is used for receiving the original signals from the amplification demodulation circuit and the data storage unit.

Description

A kind of visible ray wireless communication system of energy-autarchic
Technical field
The present invention relates to visible light communication technical field, particularly a kind of visible ray wireless communication system of energy-autarchic.
Background technology
LED-based visible light communication (VLC) system will be thrown light on and the fusion of communicating by letter, and be a kind of emerging light wireless communication technology.LED light source has fast response time, and the life-span is long, the feature of low-power consumption.In recent years, along with improving constantly of LED luminous efficiency, LED is replacing incandescent lamp gradually becomes lighting source of future generation.VLC has higher fail safe and privacy, does not produce electromagnetic interference, also without the permission of corresponding band, is the another kind of communication outside radio communication.VLC is becoming the focus of domestic and international research (referring to document: Aleksandar Jovicic et al, " Visible Light Communication:Opportunities; Challenges and the Path to Market ", IEEE Communications Magazine, Vol.51, no.12, p.26-32 (2013)).
Silicon photocell is also little for the research of visible light communication.First the scientific research personnel of Korea S has studied silicon photocell and has received the feasibility of visible light signal and frequency response characteristic (referring to document: Sung-Man Kim et al., " Simultaneous reception of solar power and visible light ", Optical Engineering, Vol.53, no.4 (2014)).
At present, in visible light communication system, the photo-electric conversion elements such as multiplex PIN or APD make optical receiver, realize the amplification, filtering, demodulation of signal etc. through back-end circuit.The operating current of receiver is provided by external power source.This has just limited the moving freely property of receiver.And with powered battery continued power for a long time, therefore move freely communication aspects in realization and produced very large obstruction.
Summary of the invention
(1) technical problem that will solve
In view of this, the present invention proposes a kind of visible light communication system of energy-autarchic, it uses silicon photocell as visible ray receiver detector, in receiving signal, realize opto-electronic conversion, charge a battery, for operating circuit provides power supply, realize energy-autarchic type receiver.
(2) technical scheme
The visible light communication system that the invention provides a kind of energy-autarchic, it comprises:
Computer, signal send modulation module, LED light source, silicon photocell, the first filter circuit, data storage, the second filter circuit, amplify demodulator circuit, terminal equipment;
Wherein, described computer export transmits signal, and described signal sends modulation module for described transmission signal loading is arrived to described LED light source, is sent the light intensity signal of variation by described LED light source;
Described silicon photocell receives the light intensity signal of described variation, and converts thereof into corresponding voltage signal; Described the first filter circuit receives described voltage signal, and alternating current component wherein of filtering and output DC component, and described the second filter circuit receives described voltage signal, and filtering DC component wherein, and output AC component; The DC component of described the first filter circuit output is for powering to described data storage and amplification demodulator circuit, the alternating current component of described the second filter circuit output is recovered primary signal after by the demodulation of described amplification demodulator circuit, and exports described primary signal to data storage storage; Described terminal equipment is for receiving described primary signal from described amplification demodulator circuit and described data storage.
(3) beneficial effect
The invention provides a kind of visible ray wireless communication system of energy-autarchic, as visible ray receiver, in receiving signal, realize opto-electronic conversion with silicon photocell, charge a battery, for operating circuit provides power supply.Use the data in memory stores battery charging process, to ensure that data can not lose simultaneously.Also can be first by battery charging, recovery system communication again while reaching certain electric weight.This process, by Single-chip Controlling, can be controlled charging and communication process according to actual needs.The present invention takes full advantage of light energy, realizes the energy-autarchic of receiver.And make the communication that moves freely of real meaning become possibility.
Brief description of the drawings
Fig. 1 shows the structural framing schematic diagram of the visible ray wireless communication system of a kind of energy-autarchic of the present invention's proposition;
Fig. 2 shows the flow chart of the visible ray radio communication of a kind of energy-autarchic in the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.
Fig. 1 shows the structural framing schematic diagram of the energy-autarchic visible ray wireless communication system of the present invention's proposition.As shown in Figure 1, this system comprises: computer 1, signal send modulation module 2, LED DC driven power supply 3, LED light source 4, silicon photocell array 5, the first filter circuit 6 for filtering alternating voltage, the first booster converter 7, lithium battery 8, the second booster converter 9, by monolithic processor controlled data storage 10, for the second filter circuit 12 of filtering direct voltage, amplify demodulator circuit 13, terminal equipment 14; Described terminal equipment is the electronic equipment for Based Intelligent Control, as computer, mobile phone printer etc.
The transmitting terminal of described visible ray wireless communication system, described computer 1 output transmits signal, and will transmit signal loading to LED by described signal transmission modulation module 2, described transmission signal is digital signal, described signal sends modulation module 2 for by 0 of the described digital signal variation that becomes light intensity with 1 corresponding conversion, passes through free space transmission by described LED4.
At receiving terminal, described silicon photocell array 5, as detector, based on photoelectricity transformation principle, voltage signal corresponding to the light intensity signal of the variation of LED4 output converts to.Rear end is by described the first filter circuit 6 and the second filter circuit 12, the DC component of described voltage signal is separated with alternating current component, be that described the first filter circuit 6 and the second filter circuit 12 are respectively from voltage signal described in described silicon photocell array received, alternating voltage described in described the first filter circuit 6 filterings in voltage signal and output DC component, the direct voltage described in described the second filter circuit 12 filterings in voltage signal and output AC component.The DC component that described the first filter circuit 6 is exported is charged for described lithium battery 8 after the first booster converter 7 boosts, lithium battery 8 is powered by monolithic processor controlled memory 10 and amplification demodulator circuit 13 to described simultaneously, and the voltage that described lithium battery 8 is exported exports data storage 10 to again and amplifies demodulator circuit 13 after the second booster converter 9 boosts.Lithium battery 8 also can pass through in figure as 11 connected mode in addition, and is directly described data storage 10 and amplification demodulator circuit 13.The alternating current component that described the second filter circuit 12 is exported is by the rear recovery primary signal of described amplification demodulator circuit 13.Described amplification demodulator circuit 13 is connected with described data storage 10, for by the primary signal data storage after recovering and read, does not have loss of data to ensure in battery charging process.Also can be first by battery charging, recovery system communication again while reaching certain electric weight.This process, by Single-chip Controlling, can be controlled charging and communication process according to actual needs.Last described transfer of data, to terminal equipment, completes communication.
The visible ray wireless communication system of the energy-autarchic based on shown in Fig. 1, the invention allows for a kind of visible ray wireless communications method of energy-autarchic, and as shown in Figure 2, it comprises:
Step 1: computer 1 sends transmission signal by serial ports, described transmission signal is digital signal.
Step 2: signal sends modulation module, after being done to on-off keying modulation, the described digital signal after coding is sent to LED light source 4, the light signal that described LED light source is changed according to the on-off keying signal output light intensity of described signal transmission modulation module output.
Step 3:LED DC driven power supply 3, for LED light source 4 is powered.
Step 4:LED signal optical source 4, is high power light source, is not only lighting source, is also communication light source and energy supply light source.As communication light source, described digital signal sends modulation module by described signal and is loaded on LED light source 4, and 0 in digital signal becomes the variation of light intensity with 1 corresponding conversion, and light is by free space transmission, realizes radio communication.As energy supply light source, the light of certain power that great power LED sends, reaches silicon photocell array 5 surfaces by free space, by opto-electronic conversion, light energy is converted to electric flux.
Step 5: silicon photocell array 5, for receiving visible light signal and transform light energy being become to electric energy.Described silicon photocell array is made up of the silicon photocell of series and parallel connections, and object is to increase light intensity detection area, makes silicon photocell receive enough light energies.Based on photoelectricity transformation principle, silicon photocell can voltage signal corresponding to the light intensity signal of variation convert to, and the light intensity value that this voltage signal detects with silicon photocell becomes positive correlation.By extracting the voltage signal of alternation, can recover primary signal.
Step 6: the first filter circuit 6, the alternating voltage described in filtering in voltage signal, extracts direct voltage.
Step 7: described the first booster converter 7, the DC voltage value of exporting for improving the first filter circuit 6, and to lithium cell charging.
Step 8: lithium battery 8, for storing the electric energy of silicon photocell opto-electronic conversion output.Lithium battery has certain initial quantity of electricity, and system can be worked.Have after illumination, by silicon photocell array 5 to its charging time, supplying power for outside.
Step 9: the second booster converter 9, after the voltage of exporting at raising lithium battery 8, for described data storage 10 and amplification demodulator circuit 13 provide the voltage that meets job requirement.
Step 10: data storage 10, it is by Single-chip Controlling, and deposits the data of amplifying demodulator circuit 13 demodulation outputs, the battery beginning reading out data that charged.To ensure the loss that does not have data in battery charging process.
In above-mentioned steps, can also adopt another kind of supply power mode, the voltage that utilizes silicon photocell array output after the first booster converter 7 directly to described data storage 10 with amplify demodulator circuit 13 and power, and without the charge and discharge process of described lithium battery 8.Like this can simplied system structure, directly utilize the electric energy of light conversion.
Step 11: the second filter circuit 12, for the flip-flop of filtering silicon photocell output voltage, extracts alternating voltage signal.
Step 13: amplify demodulator circuit and receive described alternating voltage signal from the second filter circuit 12, and from wherein recovering raw electrical signal, by the alternating voltage signal of silicon photocell output amplify, filtering and shaping, recover primary signal.The output of described amplification demodulator circuit is connected with described data storage 10, it is stored to data storage 10 after demodulation obtains primary signal, and from described data storage 10, read out when needed, in battery charging process, do not have loss of data to ensure.Also can be first by battery charging, recovery system communication again while reaching certain electric weight.This process is by Single-chip Controlling.
Step 14: the primary signal that described amplification demodulator circuit 13 demodulation obtain can directly export terminal equipment 14 to, or reads the initial data of storage from data storage 10, completes whole communication process; Described terminal equipment can be computer, mobile phone, printer etc.。
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (9)

1. a visible light communication system for energy-autarchic, it comprises:
Computer, signal send modulation module, LED light source, silicon photocell, the first filter circuit, data storage, the second filter circuit, amplify demodulator circuit, terminal equipment;
Wherein, described computer export transmits signal, and described signal sends modulation module for described transmission signal loading is arrived to described LED light source, is sent the light intensity signal of variation by described LED light source;
Described silicon photocell receives the light intensity signal of described variation, and converts thereof into corresponding voltage signal; Described the first filter circuit receives described voltage signal, and alternating current component wherein of filtering and output DC component, and described the second filter circuit receives described voltage signal, and filtering DC component wherein, and output AC component; The DC component of described the first filter circuit output is for powering to described data storage and amplification demodulator circuit, the alternating current component of described the second filter circuit output is recovered primary signal after by the demodulation of described amplification demodulator circuit, and exports described primary signal to data storage storage; Described terminal equipment is for receiving described primary signal from described amplification demodulator circuit and described data storage.
2. the system as claimed in claim 1, it also comprises: energy storage device, the DC component of described the first filter output is used to described lithium cell charging, and described energy storage device is used to described data storage and amplifies demodulator circuit power supply.
3. system as claimed in claim 2, wherein, described energy storage device is lithium battery.
4. the system as claimed in claim 1, wherein, described signal sends modulation module and be sent to LED light source after described transmission signal being done to on-off keying modulation, to control the light intensity signal of described LED light source exporting change.
5. the system as claimed in claim 1, wherein, described silicon photocell is the array of multiple silicon photocell compositions.
6. system as claimed in claim 5, it also comprises:
The first booster converter, it,, for promoting the magnitude of voltage of DC component of the first filter circuit output, is thought described data storage and amplifies demodulator circuit power supply.
7. the system as claimed in claim 1, wherein, described terminal equipment is computer, mobile phone, printer.
8. a visible light communication method for energy-autarchic, it comprises:
Computer export transmits signal;
Signal sends modulation module for described transmission signal loading is arrived to described LED light source, is sent the light intensity signal of variation by described LED light source;
Silicon photocell receives the light intensity signal of described variation, and converts thereof into corresponding voltage signal;
The first filter circuit receives described voltage signal, and alternating current component wherein of filtering and output DC component; The DC component of described the first filter circuit output is for powering to described data storage and amplification demodulator circuit;
The second filter circuit receives described voltage signal, and filtering DC component wherein, and output AC component;
The alternating current component that described in the demodulation of amplification demodulator circuit, the second filter circuit is exported is also recovered primary signal, and export described primary signal to data storage storage;
Terminal equipment receives described primary signal from described amplification demodulator circuit and described data storage.
9. method as claimed in claim 8, wherein, receives described voltage signal at described the first filter circuit, and alternating current component wherein of filtering and also comprising after output DC component:
Exporting described DC component to energy storage device, is energy storage device power supply;
Energy storage device is described data storage and amplifies demodulator circuit power supply.
CN201410424782.1A 2014-08-26 2014-08-26 A kind of visible light wireless communication system of energy-autarchic Active CN104184519B (en)

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CN104868952A (en) * 2015-06-18 2015-08-26 北京邮电大学 Solar cell and light-emitting diode-based function-symmetric passive full-duplex transmit-receive device in visible light communication system
CN105141375A (en) * 2015-09-17 2015-12-09 天津大学 Passive visible light communication receiver
CN105141025A (en) * 2015-09-29 2015-12-09 京东方科技集团股份有限公司 Wearable device, and charging device and charging system for the same
CN105162516A (en) * 2015-06-10 2015-12-16 林新 LED lighting communication device and LED lighting communication system
CN105471502A (en) * 2015-12-08 2016-04-06 武汉邮电科学研究院 Communication system and method based on visible light and solar panel
CN110166125A (en) * 2019-06-26 2019-08-23 广东工业大学 A kind of satellite communication system and method

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105162516A (en) * 2015-06-10 2015-12-16 林新 LED lighting communication device and LED lighting communication system
CN104868952A (en) * 2015-06-18 2015-08-26 北京邮电大学 Solar cell and light-emitting diode-based function-symmetric passive full-duplex transmit-receive device in visible light communication system
CN105141375A (en) * 2015-09-17 2015-12-09 天津大学 Passive visible light communication receiver
CN105141025A (en) * 2015-09-29 2015-12-09 京东方科技集团股份有限公司 Wearable device, and charging device and charging system for the same
US10305318B2 (en) 2015-09-29 2019-05-28 Boe Technology Group Co., Ltd. Wearable device, charging device for the wearable device, and charging system
CN105471502A (en) * 2015-12-08 2016-04-06 武汉邮电科学研究院 Communication system and method based on visible light and solar panel
CN110166125A (en) * 2019-06-26 2019-08-23 广东工业大学 A kind of satellite communication system and method

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