CN106375007A - Visible light communication-based device and method for LED light source - Google Patents
Visible light communication-based device and method for LED light source Download PDFInfo
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- CN106375007A CN106375007A CN201610819761.9A CN201610819761A CN106375007A CN 106375007 A CN106375007 A CN 106375007A CN 201610819761 A CN201610819761 A CN 201610819761A CN 106375007 A CN106375007 A CN 106375007A
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- led light
- light source
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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
- 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
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
Embodiments of the present invention provide a visible light communication-based device and method for an LED light source, belonging to the field of visible light communication. The drive device for the LED light source may comprise a DC-DC apparatus, a micro-control unit, and an amplification circuit. The DC-DC apparatus is used for lowering a received voltage so as to provide a demanded voltage for the micro-control unit. The micro-control unit is used for encoding positioning information related to the LED light source and stored in the micro-control unit so as to generate a positioning data frame. The amplification circuit is used for amplifying the positioning data frame, and outputting the amplified positioning data frame to the LED light source to drive the LED light source. The positioning information is set in the drive device of the LED light source, and the drive device encodes the positioning information and amplifies the positioning data frame so as to drive the LED light source, so that the visible light emitted by the LED light source carries position information, therefore, indoor positioning is realized easily.
Description
Technical field
The present invention relates to visible light communication field, in particular it relates to a kind of based on visible light communication for LED light source
Apparatus and method for.
Background technology
With the development of social economy, the requirement to location technology has been not solely restricted to outdoor, indoor positioning technologies
Then become study hotspot in recent years.In occasions such as large supermarket, hospital and schools, can using indoor positioning technologies
It is quickly found target and oneself location, thus realizing reliable indoor navigation.In the research in past, scientific research people
Member proposes many indoor positioning schemes based on radio wave technologies.Mainly there are RF identification, wifi, ultrasonic system, bluetooth etc..
But the indoor locating system of radio communication can be subject to electromagnetic interference influence, and communication quality in the case of multiple users to shares
Decline, these factors all directly or indirectly have impact on the acquisition of location information and the degree of accuracy of acquisition.Additionally, based on rf's
System can not use in the environment of some electromagnetic susceptibilities such as hospital, airport, and this promotes visible ray to a certain extent and leads to
The letter application in location technology indoors, the room based on visible light communication (vlc, visible light communications)
Interior alignment system has the advantages that positioning precision height, strong security, no electromagnetic interference compared with other location technologies.
Indoor locating system based on visible light communication be usually rely on led as light source, led have using voltage low,
Power is low, life-span length, the advantages of be easy to miniaturization.On the other hand, the characteristic such as led has High Speed Modulation and response time is short, makes
The application obtaining led extend to the every field such as communication and sensing technology from lighting field.
The indoor locating system based on visible light communication proposing at present mainly takes following two methods, and one kind is profit
The triangulation being positioned based on distance and angle with multi-multipoint communication, another kind is using vlc and ad hoc
The method of mixture of networks realizes indoor positioning.
Triangulation is the visible ray localization method that a kind of geometric propertieses using triangle carry out estimated location, the method
Using multi-multipoint communication, the distance based on transmitting terminal and receiving terminal or angle are positioned.Fig. 1 shows triangulation
The instrumentation plan of method, as shown in figure 1, system is made up of multiple LED light sources and receptor, in figure LED light source 11,12,13 and
Receptor 14 is only used for illustrating, and the optical signal from each LED light source sends independent location information data stream, and all independently
It is received by the receiver, but the time being received or signal intensity are different, are computed can achieve positioning.
Fig. 2 shows the schematic diagram realizing indoor positioning using the method for vlc and ad hoc network mixing.As shown in Fig. 2
This alignment system can include LED light source 22, via node 23, host node 24 and the terminal 25 being arranged in room 21.It is derived from
The positional information of LED light source 22 is received by the photodiode module of via node 23, the positional information receiving be reconstructed and
It is converted into digital visible ray identification information, the transceiver module of Wireless Personal Network is by this digital visible ray identification information after process
By multi-hop transmission to host node 24, the visible ray identification information finally carrying positional information is displayed on and is connected to host node 24
The screen of terminal 25 on.
Seen from the above description, it is necessary to make LED light source send data message in visible ray indoor locating system, but
It is the realization being not directed to this part in prior art.
The driving of existing LED light source mainly adjusts the driver of LED light source brightness by additional pulse-width signal.
This LED light source driving circuit generally has voltage supply module, cache module and filtration module.It passes through voltage supply module
To export a supply voltage, to receive pulse-width signal and supply voltage by cache module and this supply voltage is carried out
Buffering, carries out power amplification to supply voltage.Voltage after power amplification after filtering module filtering modulation, thus
LED light source is driven so that LED light source lights to a driving current, and adjusted by additional pulse-width signal
The luminosity of led.The luminosity adjusting LED light source can't make LED light source launch the visible ray containing positional information
Signal, thus drive the technology of LED light source to be not used to visible ray indoor locating system by adjusting luminosity.
The patent of Application No. 201410246324.3 discloses a kind of indoor locating system based on LED lamp, this system
Being accurately positioned of interior is obtained by the flicker frequency obtaining LED lamp, the flicker frequency of LED lamp pre-sets.Tool
Body ground, the flicker frequency of LED lamp is preset by signal receiving unit data processing unit.Signal receiving unit receives outside
The LED lamp flicker frequency Regulate signal of input, this flicker frequency Regulate signal is converted to the signal of telecommunication, is sent to a/d modulus of conversion
Block.LED lamp flicker frequency Regulate signal includes coding and the flicker frequency to the LED lamp that should encode of LED lamp.A/d changes
Module converts electrical signals to flicker frequency and adjusts digital signal, is sent to data processing unit.Data processing unit is to flicker
Frequency adjusts digital signal and is identified, and generates corresponding pulse-width signal, it is right that this pulse-width signal is sent to
Answer the driver element of LED lamp.Pulse width modulated signal conversion is drive signal by driver element, drives LED lamp to send corresponding flicker
The light of frequency.Each LED lamp is respectively provided with independent driver element.Although this technical scheme can be realized to based on indoor positioning system
The driving of the LED light source of system, but be also substantially the flicker frequency driving LED light source by additional pulse-width signal, its
Realize process relative complex.
Content of the invention
The purpose of the embodiment of the present invention be provide a kind of based on visible light communication for LED light source Apparatus and method for,
It can easily drive LED light source to produce the visible ray carrying location information in the case of not affecting LED light source illumination.
To achieve these goals, the embodiment of the present invention provides a kind of driving equipment for LED light source, this driving equipment
Including: dc-dc device, for the voltage being received being carried out with blood pressure lowering for providing required voltage for micro-control unit；Described
Micro-control unit, for the location information relevant with described LED light source being stored in this micro-control unit is encoded with
Generate location data frame；And amplifying circuit, for being amplified to described location data frame, and by amplify after location data
Frame exports to described LED light source to drive described LED light source.
Alternatively, described driving equipment also includes download apparatus, by this download apparatus, is deposited in described micro-control unit
The described location information of storage can be updated.
Alternatively, described download apparatus is usb interface.
Alternatively, described location data frame includes the check code of the frame head of 8 bits, the position data of 16 bits and 4 bits.
Alternatively, described location data frame also includes the position data radix-minus-one complement of 16 bits and the check code radix-minus-one complement of 4 bits.
Alternatively it is characterised in that the mode that encoded based on nrz-ook of described micro-control unit is come to micro- to being stored in this
The location information relevant with described LED light source in control unit is encoded.
Correspondingly, the embodiment of the present invention also provides a kind of visible ray alignment system, and this system includes: one or more led
Light source；The one or more above-mentioned driving equipment corresponding with one or more of LED light sources, one for driving
Or multiple LED light source.
Alternatively, described system also includes: with the one or more power supplys corresponding to one or more of driving equipments
Adapter, for powering for one or more of driving equipments.
Correspondingly, the embodiment of the present invention also provides a kind of terminal, and this terminal includes: Optical Receivers, for receive by
The optical signal that the LED light source that the driving equipment stated is driven is sent；Photoelectric conversion module, for being converted to described optical signal
The signal of telecommunication；Decoder module, for decoding the positional information of described LED light source from the described signal of telecommunication；Control module, for root
The positional information that decoded according to described decoder module and the map of current position are determining the position being presently in.
Alternatively, described terminal also includes: receiver module, for receiving the map of described current position from server.
Correspondingly, the embodiment of the present invention also includes a kind of method for terminal, and the method includes: receives by above-mentioned drive
The optical signal that the LED light source that dynamic equipment is driven is sent；Described optical signal is converted to the signal of telecommunication；Solve from the described signal of telecommunication
Code goes out the positional information of described LED light source；The positional information being decoded according to described decoder module and the map of current position
To determine the position being presently in.
Alternatively, methods described also includes: receives the map of described current position from server.
By technique scheme, built-in location information in the driving equipment of LED light source, by driving equipment, this positioning is believed
Breath is encoded and is amplified to drive LED light source so that carrying positional information in the visible ray that sends of LED light source, thus can
Easily realize indoor positioning.
The further feature of the embodiment of the present invention and advantage will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide and the embodiment of the present invention is further understood, and constitutes a part for description, with
The specific embodiment in face is used for explaining the embodiment of the present invention together, but does not constitute the restriction to the embodiment of the present invention.Attached
In figure:
Fig. 1 shows the instrumentation plan of triangulation；
Fig. 2 shows the schematic diagram realizing indoor positioning using the method for vlc and ad hoc network mixing；
Fig. 3 shows the structural representation of the driving equipment being used for LED light source in an embodiment；
Fig. 4 shows the connection diagram of the driving equipment for LED light source provided in an embodiment of the present invention；
Fig. 5 shows the structural representation of the driving equipment being used for LED light source in another embodiment；
Fig. 6 shows the frame structure schematic diagram of location data frame in an embodiment；
Fig. 7 shows the structural representation of visible ray alignment system provided in an embodiment of the present invention；
Fig. 8 shows the structural representation of terminal provided in an embodiment of the present invention；
The flow chart that Fig. 9 shows the method for terminal provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the embodiment of the present invention is described in detail.It should be appreciated that this
The described specific embodiment in place is merely to illustrate and explains the embodiment of the present invention, is not limited to the embodiment of the present invention.
Fig. 3 shows the structural representation of the driving equipment being used for LED light source in an embodiment.As shown in figure 3, the present invention
Embodiment provides a kind of driving equipment 30 for LED light source, and this driving equipment 30 may include that dc-dc device 31, for right
The voltage being received carries out blood pressure lowering for providing required voltage for micro-control unit；Described micro-control unit 32, for depositing
The location information relevant with described LED light source being stored in this micro-control unit is encoded to generate location data frame；And
Amplifying circuit 33, for being amplified to described location data frame, and the location data frame after amplifying is exported to described led light
Source is to drive described LED light source, thus the signal with regard to positional information can be loaded into the visible ray that LED light source is sent
On.Additionally, built-in location information in the driving equipment of LED light source, this location information is encoded and amplified by driving equipment
To drive LED light source so that carrying positional information in the visible ray that sends of LED light source, thus can easily realize indoor fixed
Position.
Wherein, the input voltage being received can be reduced and stablize in 5v or 3.3v with to microcontroller by dc-dc device 31
Unit 32 is powered.
Alternatively, amplifying circuit 33 mainly can constitute promotion level by transistor, and is made up of with pmos pipe nmos pipe
Push-pull configuration, to drive led to send corresponding optical signal.
Here, location data frame is loaded into the intensity being equivalent in the visible light signal of LED light source by LED light source
It is modulated so that LED light source sends the visible ray carrying location information.
Fig. 4 shows the connection diagram of the driving equipment for LED light source provided in an embodiment of the present invention.As Fig. 4 institute
Show, alternatively, the input of the driving equipment 30 for LED light source of the embodiment of the present invention can connect to power supply adaptor
41, and outfan connects to LED light source 42.In traditional lighting, power supply adaptor 41 is usually directly to be connected with LED light source 42
Connect, alternating current is converted to unidirectional current to provide unidirectional current for LED light source 42 by power supply adaptor 41.And in embodiments of the present invention
Be equivalent to and increased a driving equipment 30 between power supply adaptor 41 and LED light source 42, set for driving by power supply adaptor 41
Standby 30 provide the DC voltage needed for work, then to drive LED light source 42 by driving equipment 30.
Fig. 5 shows the structural representation of the driving equipment being used for LED light source in another embodiment.As shown in figure 5, it is optional
Ground, power supply adaptor 41 can also be the voltage needed for amplifying circuit 33 offer work, and power supply adaptor 41 will be from power supply 51
Exchange input be converted to direct current output, and by this direct voltage output to dc-dc device 31 and amplifying circuit 33.
With further reference to Fig. 5, alternatively, driving equipment 30 can also include a download apparatus 34 in this embodiment, leads to
Cross download apparatus 34 and the program in micro-control unit 32 can be carried out with burning with debugging in order to update in micro-control unit 32
The location information being stored.
Alternatively, download apparatus 34 can be usb interface or micro usb interface, but the embodiment of the present invention does not limit
It is formed on this.
Additionally, the frame of the coded system of micro-control unit 32 and location data frame can also be tied by download apparatus 34
Structure is configured it is preferable that the coded system of micro-control unit 32 can be configured so that using nrz-ook coded system, the party
Formula can simply and effectively be encoded and can be provided communication data rate by improving slot efficiency.
Fig. 6 shows the frame structure schematic diagram of location data frame in an embodiment.As shown in fig. 6, t represents the frame period, fixed
Bit data frames are periodic signal so that LED light source can continuously launch the light being loaded with location information periodically.ttidleRepresent
Free time length, signal output high level when idle, so that the illumination functions of LED light source are unaffected.tsigRepresent and comprise to position number
It is believed that the duration of the signal of breath.The signal comprising location data information can be divided into frame head, position data and check code three
Point, the check code of the frame head, the position data of 16 bits and 4 bits of 8 bits specifically, can be included, alternatively, at this three
/ after can also include the position data radix-minus-one complement of 16 bits and the check code radix-minus-one complement of 4 bits, to ensure the constant of luminous power,
The light intensity that so human eye is experienced is constant, and then does not interfere with the illumination of LED light source.Preferably, positioning number can be set
According to the low and high level of frame conversion frequency be higher than human eye stagnation frequency, that is, the flicker frequency controlling LED light source is higher than human eye
Stagnate frequency.
Fig. 7 shows the structural representation of visible ray alignment system provided in an embodiment of the present invention.As shown in fig. 7, this
Bright embodiment also provides a kind of visible ray alignment system, and this system includes: one or more LED light sources；With one or many
The corresponding one or more above-mentioned driving equipment of individual LED light source, for driving one or more of LED light sources.
Alternatively, described system can also include the power supply adaptor corresponding with driving equipment, for turning alternating current
It is changed to unidirectional current with the voltage for described driving equipment offer work needed for.This visible ray alignment system can apply to indoor big
Type market, underground parking or airport etc., typically require the multiple LED light sources of installation to facilitate user to exist in these occasions
Each position all can be positioned, and can meet illumination by using the visible ray alignment system based on LED light source
Realize while demand being accurately positioned.
Fig. 8 shows the structural representation of terminal provided in an embodiment of the present invention.As shown in figure 8, correspondingly, the present invention is real
Applying example also provides a kind of terminal, and this terminal may include that Optical Receivers 81, is provided by the embodiment of the present invention for reception
The optical signal that the LED light source that driving equipment is driven is sent；Photoelectric conversion module 82, for being converted to electricity by described optical signal
Signal；Decoder module 83, for decoding the positional information of described LED light source from the described signal of telecommunication；Control module 84, is used for
The positional information that decoded according to described decoder module and the map of current position are determining the position being presently in.
Alternatively terminal can be for example smart mobile phone, panel computer, personal digital assistant etc..Optical Receivers 81 is permissible
It is the built-in camera of terminal, the visible light signal of LED light source transmitting can be received by opening this built-in camera.Photoelectricity
Modular converter 82 can be able to be photodiode with selection of land, and the optical signal that Optical Receivers is received is converted to the signal of telecommunication, warp
Cross and entrained positional information in the visible ray that LED light source is launched after this signal of telecommunication is processed and decodes, can be obtained.
In the terminal, the map being presently in interior can be previously stored with, control module 84 by the positional information being obtained and can be somebody's turn to do
Map is compared to orient on map and to show that user is presently in position.
Optionally, in addition, the map being presently in interior can also be obtained by downloading from server, then terminal also may be used
To include a receiver module, for receiving described map from server.Terminal alternatively can by using wifi, gprs etc. with
Server is communicated.
The flow chart that Fig. 9 shows the method for terminal provided in an embodiment of the present invention.As shown in figure 9, correspondingly, this
Inventive embodiments also include a kind of method for terminal, and the method includes: step s10, receive and are carried by the embodiment of the present invention
For the optical signal that sent of the LED light source that driven of driving equipment；Step s20, described optical signal is converted to the signal of telecommunication；Step
Rapid s30, decodes the positional information of described LED light source from the described signal of telecommunication；Step s40, is solved according to described decoder module
The map of the positional information of code and current position is determining the position being presently in.
The concrete operating principle of the method for user terminal provided in an embodiment of the present invention and benefit and terminal mentioned above
Concrete operating principle and benefit similar, will not be described in great detail here.
Describe the optional embodiment of example of the present invention above in association with accompanying drawing in detail, but, the embodiment of the present invention does not limit
Detail in above-mentioned embodiment, in the range of the technology design of the embodiment of the present invention, can be to the embodiment of the present invention
Technical scheme carry out multiple simple variant, these simple variant belong to the protection domain of the embodiment of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the embodiment of the present invention pair
Various possible compound modes no longer separately illustrate.
It will be appreciated by those skilled in the art that all or part of step realized in above-described embodiment method can be by
Program to complete come the hardware to instruct correlation, and this program storage, in a storage medium, includes some instructions use so that one
Individual (can be single-chip microcomputer, chip etc.) or processor (processor) execute the whole of each embodiment methods described of the application
Or part steps.And aforesaid storage medium includes: u disk, portable hard drive, read only memory (rom, read-only
Memory), random access memory (ram, random access memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
Additionally, combination in any can also be carried out between the various different embodiment of the embodiment of the present invention, as long as it is not
Run counter to the thought of the embodiment of the present invention, it equally should be considered as embodiment of the present invention disclosure of that.
Claims (12)
1. a kind of driving equipment for LED light source is it is characterised in that this driving equipment includes:
Dc-dc device, for carrying out blood pressure lowering for providing required voltage for micro-control unit to the voltage being received；
Described micro-control unit, for entering to the location information relevant with described LED light source being stored in this micro-control unit
Row coding is to generate location data frame；And
Amplifying circuit, for being amplified to described location data frame, and the location data frame after amplifying is exported to described led
Light source is to drive described LED light source.
2. driving equipment according to claim 1 it is characterised in that
Described driving equipment also includes download apparatus, and by this download apparatus, stored in described micro-control unit is described fixed
Position information can be updated.
3. driving equipment according to claim 2 is it is characterised in that described download apparatus is usb interface.
4. the driving equipment according to claim 1 is asked it is characterised in that described location data frame include 8 bits frame head,
The position data of 16 bits and the check code of 4 bits.
5. driving equipment according to claim 4 is it is characterised in that described location data frame also includes the position of 16 bits
The check code radix-minus-one complement of data radix-minus-one complement and 4 bits.
6. the driving equipment according to any one claim in claim 1 to 5 is it is characterised in that described microcontroller
The mode that unit is encoded based on nrz-ook is come to the positioning relevant with described LED light source being stored in this micro-control unit
Information is encoded.
7. a kind of visible ray alignment system is it is characterised in that this system includes:
One or more LED light sources；
Any one claim institute in one or more claim 1 to 6 corresponding with one or more of LED light sources
The driving equipment stated, for driving one or more of LED light sources.
8. system according to claim 7 is it is characterised in that described system also includes:
With the one or more power supply adaptors corresponding to one or more of driving equipments, for for one or more of
Driving equipment is powered.
9. a kind of terminal is it is characterised in that this terminal includes:
Optical Receivers, the driving equipment for receiving described in any one claim in claim 1 to 6 is driven
The optical signal that LED light source is sent；
Photoelectric conversion module, for being converted to the signal of telecommunication by described optical signal；
Decoder module, for decoding the positional information of described LED light source from the described signal of telecommunication；
Control module, the map for the positional information that decoded according to described decoder module and current position determines currently
Location.
10. terminal according to claim 9 is it is characterised in that described terminal also includes:
Receiver module, for receiving the map of described current position from server.
A kind of 11. methods for terminal are it is characterised in that the method includes:
The LED light source that driving equipment described in any one claim in claim 1 to 6 for the reception is driven is sent
Optical signal；
Described optical signal is converted to the signal of telecommunication；
The positional information of described LED light source is decoded from the described signal of telecommunication；
The positional information that decoded according to described decoder module and the map of current position are determining the position being presently in.
12. methods according to claim 11 are it is characterised in that methods described also includes:
Receive the map of described current position from server.
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| CN201610819761.9A CN106375007A (en) | 2016-09-12 | 2016-09-12 | Visible light communication-based device and method for LED light source |
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| CN201610819761.9A CN106375007A (en) | 2016-09-12 | 2016-09-12 | Visible light communication-based device and method for LED light source |
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| CN201610819761.9A Pending CN106375007A (en) | 2016-09-12 | 2016-09-12 | Visible light communication-based device and method for LED light source |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107218944A (en) * | 2017-04-09 | 2017-09-29 | 深圳市芯通信息科技有限公司 | A kind of indoor parking Position Fixing Navigation System and method based on visible light communication technology |
| CN107490374A (en) * | 2017-09-19 | 2017-12-19 | 成都猫道科技有限公司 | LED-based indoor positioning code device, system and video decoding apparatus, method |
| CN113452442A (en) * | 2020-12-17 | 2021-09-28 | 芯创通(南京)半导体科技有限公司 | Novel point-to-multipoint visible light communication demodulation mode |
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| CN113452442A (en) * | 2020-12-17 | 2021-09-28 | 芯创通(南京)半导体科技有限公司 | Novel point-to-multipoint visible light communication demodulation mode |
| CN113452442B (en) * | 2020-12-17 | 2022-07-08 | 芯创通(南京)半导体科技有限公司 | Point-to-multipoint visible light communication demodulation mode |
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Application publication date: 20170201 |