CN103368648B - Visible light communication system based on time division multiple access - Google Patents
Visible light communication system based on time division multiple access Download PDFInfo
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- CN103368648B CN103368648B CN201210094135.XA CN201210094135A CN103368648B CN 103368648 B CN103368648 B CN 103368648B CN 201210094135 A CN201210094135 A CN 201210094135A CN 103368648 B CN103368648 B CN 103368648B
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Abstract
The invention discloses a visible light communication system based on time division multiple access, which comprises a transmitting device and a receiving device, wherein the transmitting device comprises a housing, a microprocessor arranged in the housing and used for coding acquired identification data, and a transmitting unit connected with the microprocessor, externally embedded at one end of the housing and used for transmitting unlocking information and remote control information previously coded by the microprocessor through visible light signal crossing; the receiving device comprises a receiving unit for performing photovoltaic conversion on a received visible light signal and outputting a digital signal, and a processing unit connected with the receiving unit and used for identifying a header carrying data in the digital signal, and extracting and decoding the information part corresponding to the header, as well as a verification unit connected with the processing unit and the main control circuit board and used for transmitting the information of executing a corresponding action to the main control circuit board when the information part decoded by the processing unit is approved. The visible light communication system based on time division multiple access is capable of realizing the multi-output multi-input mode of the visible light communication.
Description
Technical field
The present invention relates to technical field of photo communication, and in particular to a kind of visible light communication system based on time division multiple acess.
Background technology
Also known as visible optical communication, it is communicated wireless light communication technology by the altofrequency flicker of LED light source, there is light
1 is represented, unglazed to represent 0, its transfer rate is up to upper gigabit per second.Wireless light communication is carried out data transmission by visible ray,
Compared with microwave technology, there is quite abundant frequency spectrum resource, be that general microwave communication and radio communication are incomparable；Simultaneously can
See optic communication can be suitable for any communication protocol, suitable for any environment；In terms of safety, it is not necessary to worry Content of Communication by people
Steal；The equipment of wireless light communication is flexibly convenient, and cost is very low, is adapted to extensive popularization and application.
In prior art, LED light communication can only transmit a kind of useful letter using single output single input mode, same LED
Number, limit its range of application.
The content of the invention
Embodiment of the present invention technical problem to be solved is, there is provided a kind of visible light communication based on time division multiple acess
System, can realize the multi output multi input mode of visible light communication.
In order to solve above-mentioned technical problem, embodiment of the present invention provides a kind of visible light communication based on time division multiple acess
System, including dispensing device and reception device, the dispensing device includes shell；Inside the shell is placed in, for the identification to obtaining
The microprocessor that data are encoded, the identification data is the unlocking information with stem and the remote information with stem；With
The microprocessor connection, is embedded in outward shell one end, for after microprocessor coding described in visible light signal Cross transfer
Unlocking information and shake the transmitting element of control information；
The reception device is included for carrying out opto-electronic conversion to the visible light signal for receiving, by the voltage being converted to letter
Number as digital signal output receiving unit；Be connected with the receiving unit, for recognizing the digital signal in carry number
According to stem for recognizable information when, the processing unit that the corresponding message part of stem is extracted and decoded；And respectively
It is connected with processing unit and main control board, for the decoded message part of processing unit and default verification data to be carried out
Compare, when the message part for extracting is matched with default verification data, the letter for performing corresponding actions is sent to main control board
The authentication unit of breath.
The communication system that technical solution of the present invention is provided, dispensing device sends information by the way of time division multiple acess, receives
The stem of the different information carried in device identification optical signal, extracts the corresponding message part of recognizable stem, therefore same
Device is sent to correspond to different reception devices, different receiving terminals can share same dispensing device, it is visible so as to be capable of achieving
The multi output multi input mode of optical communication system, expanding can be by the range of application of optical communication system；In addition, information is by visible
Optical signal transmitting, due to the linear transmission characteristic of optical signal, it is not easy to be stolen, so as to improve dispensing device transmission data
Safety.
Description of the drawings
In order to be illustrated more clearly that embodiment of the present invention or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present invention, for those of ordinary skill in the art, in the premise for not paying creative labor
Under, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the structural representation of the visible light communication system that first embodiment of the invention is provided；
Fig. 2 is the optic communication schematic diagram based on time division multiple acess that first embodiment of the invention is provided；
Fig. 3 is the structural representation of the visible light communication system that second embodiment of the invention is provided；
Fig. 4 is the structural representation of the visible light communication system that third embodiment of the invention is provided；
Fig. 5 is the structural representation of the visible light communication system that four embodiment of the invention is provided；
Fig. 6 is the structural representation of the visible light communication system that fifth embodiment of the invention is provided；
Fig. 7 is the structural representation of the visible light communication system that sixth embodiment of the invention is provided；
Fig. 8 is the structural representation of the visible light communication system that seventh embodiment of the invention is provided；
Fig. 9 is the front view of the dispensing device that seventh embodiment of the invention is provided.
Specific embodiment
Below in conjunction with the accompanying drawing in embodiment of the present invention, the technical scheme in embodiment of the present invention is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the invention, rather than the reality of whole
Apply mode.Based on embodiments of the present invention, those of ordinary skill in the art are obtained under the premise of creative work is not made
The every other embodiment for obtaining, belongs to the scope of protection of the invention.
In the embodiment of the present invention, it is seen that optical communication system is connect by optical signal by the way of time division multiple acess to different
Receiving apparatus transmit identification data, so as to realize the multi output mode of visible light signal.
In the embodiment of the present invention, the visible light communication system based on time division multiple acess includes dispensing device and reception device, sends out
Device is sent to pass through visible light signal Cross transfer unlocking information and shake control information；Reception device is received in disease identification visible light signal
The stem of carrying information, when stem is to can recognize that information, extracts the corresponding message part of stem, verifies the message part for extracting
When matching with default verification data, corresponding action is performed.
It is the structural representation of the visible light communication system that first embodiment of the invention is provided referring to Fig. 1, the visible ray
Communication system includes dispensing device 110 and reception device 120.In present embodiment, dispensing device 110 includes shell (in Fig. 1 not
Mark)；It is placed in the microprocessor 111 of inside the shell；The transmitting element 112 of shell one end is embedded in outward.
Microprocessor 111, for encoding to the identification data for obtaining, and the identification data after coding is sent to
Transmitting element 112.Specifically, the identification data of acquisition is converted to binary data by microprocessor 111, further according to Manchester
Binary data is converted to upper lower edge trigger by coded system.Within a time cycle, by binary data " 1 " conversion
For trailing edge trigger, " 0 " is converted to into rising edge trigger.Wherein, identification data is the unlocking information with stem
With the remote information with stem.
The transmitting element 112 being connected with microprocessor 111, for by microprocessor described in visible light signal Cross transfer
111 coding after unlocking information and shake control information.The transmitting element 112 can be light emitting diode, receive trailing edge triggering
Light during signal, do not light when receiving rising edge trigger.
Reception device 120 can be door lock, can also be electrical equipment, including receiving unit 121, processing unit 122, Yi Jiyu
The authentication unit 123 of main control board (not identifying in Fig. 1) connection.
Receiving unit 121 is used for the visible light signal to receiving from dispensing device 110 carries out opto-electronic conversion, will be converted to
Voltage signal as digital signal export.Specifically, receiving unit 121 includes：Photodetector, can be the pole of photoelectricity two
Pipe, for detecting the visible light signal based on time division multiple acess of transmitting terminal transmission, and converts thereof into current signal；Logarithmic amplification
Device, for current signal to be changed into into voltage signal；Operational amplifier, for calculating the voltage signal volt value of logafier output
Meansigma methodss.Comparator, for differentiating to voltage signal, is judged to less than or equal to the voltage signal of volt value meansigma methodss
0, it is judged to 1 higher than the voltage signal of volt value meansigma methodss, as digital signal output.
The processing unit 122 being connected with receiving unit 121, for identification from the digital information of the output of receiving unit 121
The stem of data being carried, when the stem is to can recognize that information, the corresponding message part of stem, and the information portion to extracting is extracted
Divide and decoded.In the present embodiment, reception device 120 receives the form of data and is：Unlocking information heading-unlocking message segment 1+
Remote information stem-remote information section 1 ... unlocking information heading-unlocking message segment n+ remote information stem-remote information section
n.When reception device 120 is door lock, the signal for receiving is：Unlocking message segment 1+ unlocking message segment 2 ... unlocking message segment
n；When reception device 120 is electrical equipment, the signal for receiving is：Remote information 1+ remote informations 2 ... remote information n.Process
The message part of extraction is converted to binary data by unit 122 with the corresponding decoding process of Manchester's code mode, from
And restore the meaning for extracting the binary data representated by message part.
Specifically, processing unit 122 includes identification subelement, extracts subelement and decoding subunit, wherein：Identification
Subelement, for recognizing digital signal in carry the stem of data, judge that whether the data are to can recognize that data.For example, when
When reception device 120 is door lock, then unlocking information heading can be recognized；When reception device 120 is electrical equipment, then can recognize distant
Control information heading.Subelement is extracted, for the data to can recognize that during data, the corresponding information of stem of the extraction data
Part.For example, when reception device 120 is door lock, extracts subelement and extract：Unlocking message segment 1+ unlocking message segment 2 ... is unlocked
Message segment n；When reception device 120 is electrical equipment, extracts subelement and extract：Remote information 1+ remote informations 2 ... remote information
n.Decoding subunit, the message part for extraction unit to be extracted is converted to binary data.Specifically, Man Chesi can be adopted
The message part of extraction is converted to binary data by special decoding process.Within a time cycle, level is turned from high to low
Digital signal " 1 " is turned to, level is converted into from low to high digital signal " 0 ".
The authentication unit 123 being connected with main control board and processing unit 122 respectively, for by decoded message part
Compare with default verification data, when the message part for extracting is matched with default verification data, to main control board
Send the information for performing corresponding actions.Specifically, authentication unit 123 includes comparing subunit and action subelement.The sub- list of comparison
Unit, for the binary data that decoding subunit decoding is obtained to be compared with default verification data, works as binary data
When meeting pre-conditioned with default verification data, to action subelement trigger is sent.Wherein, binary data with it is default
Verification data meet pre-conditioned referring to：Binary data is identical with default verification data, or there is corresponding relation.It is dynamic
Make subelement, for performing corresponding action according to the trigger for receiving.For example, when reception device 120 is door lock, perform
Unlocking action；When reception device 120 is electrical equipment, performs control electric power starting or certain function enters the dynamic of working condition
Make.
For example, authentication unit 123 receives binary data, and by the binary data and a default verification data ratio
Right, when binary data meets pre-conditioned with the default verification data, reception device 120 unlocks or enters work
State.Wherein, pre-conditioned can be that binary data is identical with default verification data, or there is corresponding relation.It is default
Verification data can be binary data or be easy to the computer program design such as assembler language, the high-level language of identification using other
The data that language is write.When default verification data is write using computer programming languages such as assembler language, high-level languages
Data when, authentication unit 123 is additionally operable to the binary data for exporting processing unit 122 and the data of default verification turn
It is changed to identical form to be compared.In present embodiment, due to default verification data in authentication unit 123 and need not give
User reads, so directly writing using binary data, reduces the process of data conversion, improves distinguishing speed.
It is the optic communication schematic diagram based on time division multiple acess of first embodiment of the invention offer referring to Fig. 2, when should be based on
Divide the optic communication of multiple access as follows：When transmitting element 112 sends visible light signal, data form such as 210 is carried in the signal
Shown identification data.For example, the form of identification data is：Unlocking information heading-unlocking message segment 1+ remote information stem-distant
Control message segment 1 ... unlocking information heading-unlocking message segment n+ remote information stem-remote information section n.
Certainly, in other embodiments, when the identification data is binary data, microprocessor 111 can also
Directly identification data is converted to into upper lower edge trigger.The transmitting element 112 can also receive trailing edge triggering letter
Number when do not light, it is luminous when receiving rising edge trigger.The microprocessor 111 can adopt digit chip.
It is the structural representation of the visible light communication system that second embodiment of the invention is provided referring to Fig. 3.Relative to
One embodiment, dispensing device 310 on the basis of microprocessor 111 and transmitting element 112, also including being connected to microprocessor
Drive circuit 311 between 111 and transmitting element 112, for the electric current that microprocessor 111 is exported to be improved to transmitting element
112 operating current, the upper lower edge trigger after being encoded according to microprocessor 111 drives transmitting element 112 to send visible ray
Signal.In present embodiment, drive circuit 311 drives transmitting element 112 to light when receiving trailing edge trigger.
It is the structural representation of the visible light communication system that third embodiment of the invention is provided referring to Fig. 4.Relative to
Two embodiments, reception device 420 is also wrapped on the basis of receiving unit 121, processing unit 122 and authentication unit 123
Alarm unit 421 is included, when the message part for extracting is mismatched with default verification data, alert.For example, when
When the message part of extraction is mismatched with default verification data, sound a buzzer.
In this enforcement, reception device 420, when the situation that malice is opened is run into, sends report by increasing alarm unit 421
Alarming information, further improves safety.
It is the structural representation of the visible light communication system that four embodiment of the invention is provided referring to Fig. 5.Relative to
Three embodiments, dispensing device 510 is also wrapped on the basis of microprocessor 111, transmitting element 112 and drive circuit 311
The first verification arithmetic element 511 is included, for the identification data after encoding to microprocessor 111 verification computing is carried out, to ensure to be somebody's turn to do
The reliability of identification data transmission.
Base of the reception device 520 in receiving unit 121, processing unit 122, authentication unit 123 and alarm unit 421
On plinth, also including the second verification arithmetic element 521, for carrying out CRC check fortune to the decoded message part of processing unit 122
Calculate, so as to ensure the accuracy of the message part for extracting.
It is the structural representation of the visible light communication system that fifth embodiment of the invention is provided referring to Fig. 6.Relative to
Three embodiments, dispensing device 610 is also wrapped on the basis of microprocessor 111, transmitting element 112 and drive circuit 311
Ciphering unit 611 is included, is encrypted for the data after encoding to microprocessor 111, the ciphering unit 611 can be with microprocessor
Device 111 is integrated, it is also possible to individualism.Corresponding,
Base of the reception device 620 in receiving unit 121, processing unit 122, authentication unit 123 and alarm unit 421
On plinth, also including decryption unit 621, for being decrypted to the decoded message part of processing unit 122.Such as decryption unit
621 are used to be decrypted the binary data of the output of processing unit 122.
In the present embodiment, it is decrypted by increasing decryption unit 611 and decryption unit 621, improves visible light communication system
Safety of the system in data transmission procedure.
In specific implementation process, dispensing device 610 can also include being connected to microprocessor 111 and ciphering unit
The first verification arithmetic element between 611；Reception device 620 can also include being connected to decryption unit 621 and authentication unit 123
Between second verification arithmetic element.Specific function can be found in example IV, and here is omitted.
It is the structural representation of the visible light communication system that sixth embodiment of the invention is provided referring to Fig. 7.Relative to
Two embodiments, dispensing device 710 is also wrapped on the basis of microprocessor 111, transmitting element 112 and drive circuit 311
The memory element 711 being connected with microprocessor 111 is included, for storing identification data, the identification data is the unlocking with stem
Information and the remote information with stem.In present embodiment, memory element 711 can using programmable read only memory, can
Erasable programmable read-only memory (EPROM) or flash memory.The identification data can directly be write by manufacturer or be write by user.
The identification data can be write using binary system or be easy to the computer journeys such as assembler language, the high-level language of identification using other
Sequence design language is write.For the ease of reading, identification data is write using high-level [computer in present embodiment.
It is the structural representation of the visible light communication system that seventh embodiment of the invention is provided referring to Fig. 8.Relative to
Two embodiments, dispensing device 810 is also wrapped on the basis of microprocessor 111, transmitting element 112 and drive circuit 311
Include the first power supply 811 being connected with each functional unit of dispensing device 810 and the button 812 being connected with the first power supply 811.
First power supply 811 is used to provide electric energy to being connected thereto each functional unit.First power supply 811 can be by button 812 and transmission
Each functional unit electrical connection of device 810.When button 812 is connected, the first power supply 811 and microprocessor 111, transmitting element
112 and drive circuit 311 realize conducting, so as to transmitting element 112 is luminous, send sign unlocking information and shake control information
Optical signal.Certainly, in other embodiments, dispensing device 810 can not also include the first power supply 811 and button 812, and
Using the mode of connection direct-electrifying such as USB.First power supply 811 can be using rechargeable battery or button cell.
Reception device 820 on the basis of receiving unit 121, processing unit 122 and authentication unit 123, also including point
The second source 821 not being connected with receiving unit 121, processing unit 122 and authentication unit 123, for receiving unit
121st, processing unit 122 and authentication unit 123 provide electric energy.Second source 821 can adopt the special regulated power supply of gate inhibition,
Aneroid battery can also be adopted.Certainly, in other embodiments, reception device 820 can not also include second source 821, and
Using gate inhibition's mains transformer is passed through with lighting circuit to being connected, the confession to each functional module of visible light communication reception device is realized
Electricity.
It is the front view of the dispensing device that seventh embodiment of the invention is provided referring to Fig. 9.The dispensing device 810 includes
Transmitting element 112, shell 910 and button 812, when button 812 is pressed, transmitting element 112 sends visible light signal.
The dispensing device 810 that present embodiment is provided in combination with visible light communication, passes through by by tdma
Optical signal Cross transfer unlocking information and remote information, so as to the visible light signal that the dispensing device 810 sends may act as
The encrypted message of unlocking, it is also possible to as the encrypted message of remote control home appliance shut-off.So as to improve Consumer's Experience.
Above disclosed is only some embodiments of the present invention, can not limit the right of the present invention with this certainly
Scope, in specific implementation process, can also be combined different embodiments, obtain other embodiments, herein
Repeat no more.Therefore the equivalent variations made according to the claims in the present invention, still belong to the scope that the present invention is covered.
Claims (12)
1. a kind of visible light communication system based on time division multiple acess, including dispensing device and reception device, it is characterised in that send
Device includes shell；Inside the shell is placed in, for the microprocessor encoded to the identification data for obtaining, the identification data is band
There are the unlocking information and the remote information with stem of stem；It is connected with the microprocessor, shell one end is embedded in outward, for leads to
The unlocking information crossed after microprocessor coding described in visible light signal Cross transfer and the transmitting element for shaking control information；
The reception device includes for carrying out opto-electronic conversion to the visible light signal for receiving, the voltage signal being converted to is made
For the receiving unit of digital signal output；It is connected with the receiving unit, for carrying data in the digital signal is recognized
Stem for recognizable information when, the processing unit that the corresponding message part of stem is extracted and decoded；And respectively with
Processing unit and main control board connect, for the decoded message part of processing unit and default verification data to be compared
It is right, when the message part for extracting is matched with default verification data, the information for performing corresponding actions is sent to main control board
Authentication unit；The data carried in the digital signal include multiple stems and corresponding multiple message parts, the process
Unit is additionally operable to when the plurality of stem is to can recognize that information, is extracted the plurality of message part and is simultaneously decoded.
2. communication system according to claim 1, it is characterised in that the dispensing device also includes being connected to microprocessor
Drive circuit between transmitting element, for the electric current that the microprocessor is exported to be improved to the work of the transmitting element
Electric current, to drive the transmitting element to send visible light signal.
3. communication system according to claim 1, it is characterised in that the dispensing device also includes being connected with microprocessor
First verification arithmetic element, carry out verification computing for the identification data after encoding to microprocessor；
Accordingly, the reception device also includes the second verification arithmetic element being connected with processing unit, for the process
The decoded message part of unit carries out verification computing.
4. communication system according to claim 1, it is characterised in that the dispensing device also includes being connected with microprocessor
Ciphering unit, be encrypted for the identification data after encoding to microprocessor；
Accordingly, the reception device also includes the decryption unit being connected with processing unit, for decoding to the processing unit
Message part afterwards is decrypted.
5. communication system according to claim 1, it is characterised in that the dispensing device also includes being connected with microprocessor
Memory element, for storing the identification data.
6. communication system according to claim 1, it is characterised in that the reception device also includes being connected with authentication unit
Alarm unit, for obtain authentication unit checking extract message part and the unmatched information of default verification data
When, send chimes of doom.
7. communication system according to claim 1, it is characterised in that the dispensing device also includes and the dispensing device
Each functional unit connection the first power supply, for powering to each functional unit；
Accordingly, the reception device also includes the second source being connected with receiving unit, processing unit and authentication unit.
8. communication system according to claim 7, it is characterised in that the dispensing device also includes and first power supply
The button of connection, for controlling the shut-off of first power supply according to the trigger for receiving.
9. communication system according to claim 1, it is characterised in that the receiving unit is specifically included：
For detecting visible light signal and converting thereof into the photodetector of current signal；For the current signal to be changed into
The logafier of voltage signal；For calculating the operational amplifier of the meansigma methodss of the voltage signal volt value；And for right
Signal differentiated, is 0 less than or equal to the signal determining of volt value meansigma methodss, higher than the signal determining 1 of meansigma methodss, as number
The comparator of word signal output.
10. communication system according to claim 1, it is characterised in that the processing unit is specifically included：
The stem of data is carried in for recognizing the digital signal, judges whether the data are identification that can recognize that data
Unit；Extraction for when the data are to can recognize that data, extracting the corresponding message part of stem of the data is single
Unit；And for the message part that the extraction subelement is extracted to be converted to the decoding subunit of binary data.
11. communication systems according to claim 10, it is characterised in that the authentication unit is specifically included：
For the binary data to be compared with the default verification data, when the binary data it is pre- with described
If verification data when meeting pre-conditioned, send the comparing subunit of trigger；And for according to the triggering letter for receiving
Number perform corresponding actions action subelement.
12. communication systems according to claim 1, it is characterised in that the dispensing device is mobile terminal；The reception
Device is door lock or electrical equipment.
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| CN201210094135.XA CN103368648B (en) | 2012-04-01 | 2012-04-01 | Visible light communication system based on time division multiple access |
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| CN201210094135.XA CN103368648B (en) | 2012-04-01 | 2012-04-01 | Visible light communication system based on time division multiple access |
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| CN109067466A (en) * | 2018-09-30 | 2018-12-21 | 京东方科技集团股份有限公司 | A kind of optical communication transmission device and receiver, launching technique and method of reseptance |
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