CN104484697A - Charging and bi-direction identifying method of passive visible light label and reader-writer - Google Patents
Charging and bi-direction identifying method of passive visible light label and reader-writer Download PDFInfo
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- CN104484697A CN104484697A CN201410841963.4A CN201410841963A CN104484697A CN 104484697 A CN104484697 A CN 104484697A CN 201410841963 A CN201410841963 A CN 201410841963A CN 104484697 A CN104484697 A CN 104484697A
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Abstract
The invention discloses a charging and bi-direction identifying method of a passive visible light label and a reader-writer. A set device comprises the VL label and the reader-writer which are communicated with each other in a half-duplex and full-duplex mode of visible light communication. The reader-writer is composed of a read-write control module, a demodulating and decoding module, a judging module, a modulation and coding module, a driving module, an electric energy sending module, a communication module, a photoelectric receiver, an optical transmitter, a power transmission coil, a power source and other functional modules. The VL label comprises a label master control module, a demodulating and decoding module, a judging module, a modulating and coding module, a driving module, an electric energy receiving module, a photoelectric receiver, an optical transmitter and a power receiving coil. The VL label is a passive label. The electric energy is obtained from the reader-writer in a wireless electromagnetic power supplying mode, and a communication link is established through mutual authentication. The charging and bi-direction identifying method is achieved through the visible light communication technology and the wireless power supplying technology and is not disturbed by an electromagnetic field, the safety performance is good due to the fact that there is no electromagnetic interference, and reading and writing are more convenient due to the lighting function; the VL label is simple in structure and function and can be used for small and minitype portable devices.
Description
Technical field
The invention belongs to technical field of visible light communication, particularly the charging of a kind of passive visible ray label and read write line and bidirectional recognition method.
Background technology
Visible light communication (Visible Light Communication, be called for short VLC) technology, utilize the luminaires such as LED to send modulation visible light signal with information exactly at transmitting terminal, receiving end utilizes lighting apparatus to receive modulation visible light signal to realize the method for radio communication.This technology is the new wireless communication technology be found in recent years, is used for supplementing even substituting at present other means by development, as technology such as: radio, infrared or laser communications, to solve the deficiency of these technology.Visible light communication is different from the optical communication modes such as radio, infrared or laser: radio, infrared light be can't see, and the transmit direction of signal is clear and definite not, therefore has very large insecurity; Laser direction is strong, the little communication being applicable to opening freely, and laser power consumption is large simultaneously, little suitable Low Power Consumption Portable equipment.In addition, radio also can produce the harmful effect such as electromagnetic radiation, interference.
Wireless charging comes from wireless power conveying technology.Wireless charging, also known as doing induction charging, non-contact inductive charging, be utilize near field to respond to, i.e. electromagnetic coupled, transmits its energy to consumer by power-supply unit, and this consumer uses the energy received charge to battery or power for consumer.
The present invention's technology such as visible light communication, wireless power that has been exactly conjunctive use, provide the implementation method of a kind of visible ray bidirectional recognition passive label and read write line, solve the major issue of visible light communication equipment to light, little miniaturization, allow it can extensive popularization and application as magnetic card, various frivolous passive RFID.
Summary of the invention
The object of this invention is to provide charging and the bidirectional recognition method of a kind of passive visible ray label and read write line.
Concrete steps are:
(1) a kind of passive visible ray label and read-and-write device are set, device comprises VL label, read write line, and read write line is made up of Read-write Catrol module, read-write demodulating and decoding module, read-write judging module, read-write modulating-coding module, read-write driver module, electric energy sending module, communication module, read-write photelectric receiver, read-write optical transmitting set, power transmission coil, power module; VL label is made up of label control module, label demodulating and decoding module, label judging module, tag modulates coding module, label driver module, electric energy receiver module, label photelectric receiver, label optical transmitting set, electricity reception coil; Read-write Catrol model calling read-write demodulating and decoding module, read-write modulating-coding module, electric energy sending module, communication module, power module, power module connects read-write demodulating and decoding module, read-write judging module, read-write modulating-coding module, read-write driver module, electric energy sending module, communication module, read-write judging module connects read-write photelectric receiver, read-write demodulating and decoding module, read-write driver module connects read-write optical transmitting set, read-write modulating-coding module, and electric energy sending module connects power transmission coil; Label control module connects label demodulating and decoding module, tag modulates coding module, electric energy receiver module, electric energy receiver module connects label demodulating and decoding module, label judging module, tag modulates coding module, label driver module, electric energy receiver module, label photelectric receiver, label optical transmitting set, electricity reception coil, label judging module connects label photelectric receiver, label demodulating and decoding module, and label driver module connects label optical transmitting set, tag modulates coding module; Read-write optical transmitting set is corresponding with label photelectric receiver by read-write visible ray information, label optical transmitting set is corresponding with read-write photelectric receiver by response visible ray information, and the power transmission coil of read write line is corresponding with the electricity reception coil of VL label by wireless electromagnetic energy.
Described read write line is for utilizing the mode of visible light communication, read-write visible ray information is sent to VL label, and the response visible ray information received from VL label, with the data reading between realization with VL label or write operation, analyze, process, verify, store the information receiving VL label, carry out data communication with external unit, and provide electric energy to VL label.
Each functional module that described power module is read write line provides electric energy.
Described Read-write Catrol module is used for carrying out function control to each module of read write line, and read-write, storage data, analyzing and processing, verifies the VL label information received, carry out exchanges data by communication module and external unit.
Described read-write photelectric receiver for responding to the response visible ray information from VL label, and converts corresponding electric signal to.
Described read-write judging module receives the electric signal after from the conversion of read-write photelectric receiver for reading and writing, and converts digital signal to.
Described read-write demodulating and decoding module is used for the digital signal exported read-write judging module, carries out demodulation, decoding.
Described read-write modulating-coding module is encoded to the data-signal that Read-write Catrol module is sent, and is modulated into the signal of applicable wireless optical channel transmission.
Described read-write driver module is used for the signal sent according to read-write modulating-coding module, drives read-write optical transmitting set to send read-write visible ray information.
Described communication module is used for setting up with external unit communicating, and external device sends data, receives the data of external unit, realizes data interaction, mechanism controls.
Described read-write optical transmitting set is used under the effect of read-write driver module, sends read-write visible ray information.
Described electric energy sending module is for generation of the electric power signal being applicable to wireless power transmission.
Described power transmission coil is used for the electric power signal produced by electric energy sending module, sends, and forms charged electrical magnetic field.
Described VL label is powered by the radio energy obtained from read write line and works on power, in the mode of visible light communication, response visible ray information is sent to read write line, receive the read-write visible ray information from read write line, read or write operation with the information realized between read write line, analyze, verify, store, process the information receiving read write line.
Described label control module is used for carrying out function control to each module of VL label, read-write, storage data, the read write line data message that analyzing and processing receives.
Described electricity reception coil for responding to the radio magnetic energy received from power transmission coil, and accepts module collection with electric energy.
The radio magnetic energy that described electric energy receiver module senses for collecting electricity reception coil, for being each module supply of electrical energy of label.
Described tag modulates coding module is encoded to the various information that label control module is sent, and is modulated into the signal of applicable wireless optical channel transmission.
Described label driver module is used for the signal sent according to tag modulates coding module, drives label optical transmitting set to send response visible ray information.
Described label optical transmitting set is for sending response visible ray information.
Described label photelectric receiver for receiving the read-write visible ray information sent from read write line, and converts corresponding electric signal to.
Described label judging module is used for the electric signal sent by label photelectric receiver, converts digital signal to.
Described label demodulating and decoding module is used for the digital signal exported label judging module, carries out demodulation, and decodes.
(2) the passive visible ray label described in and the power supply of read-and-write device and Starting mode, step is as follows:
Enter holding state after P1, read write line power on, under holding state, power module is only to electric energy sending module and power transmission coil power supply, and electric energy sending module and power transmission coil are in light condition, forms the read write line perform region that externally can provide wireless electromagnetic energy.
P2, VL label is when the perform region away from read write line, be in passive state, do not work, after VL label enters the perform region of read write line, obtain wireless electromagnetic energy to work on power, electricity reception coil can produce an induction field to power transmission coil simultaneously, and the mutual inductance effect that this induction field and power transmission coil produce can cause the electromagnetic parameter of the electromagnetic field between electricity reception coil and power transmission coil to change.
After P3, electric energy sending module and power transmission coil transduces to the change of the electromagnetic parameter caused by mutual inductance effect, electric energy sending module just sends enabling signal to power module, power module provides electric energy to other functional modules of read write line, the each module of read write line all powers on and enters normal operating conditions, just can communicate with VL label.
(3) the VL label described in and the communication pattern of read write line, there are half-duplex and full duplex two kinds of modes, under way communication, at read write line to the downlink communication channel of VL label and VL label to the uplink communication channel of read write line, the band of two groups of different-wavebands is adopted to lead to filter respectively, the visible light wave range that the visible light wave range that uplink communication channel is selected and downlink communication channel are selected does not have overlapping, ensures that two channels can not disturb mutually.
(4) the VL label described in enters into read write line perform region, and obtain electric energy, after VL label and each module of read write line all work on power, both communication is divided into two processes:
1) VL label sends response visible ray information to read write line, and read write line receives the response visible ray information from VL label.
In VL tab end: information to be sent is inputed to tag modulates coding module by S1, VL label control module; The information that S2, tag modulates coding module export VL label control module, after carrying out modulating, encoding, and outputs to label driver module; S3, label driver module, according to the information through modulating-coding, drive label optical transmitting set to send response visible ray information.
Receive the response visible ray information sent from label optical transmitting set at read write line end: R1, read-write photelectric receiver, and convert corresponding electric signal to; R2, the analog electrical signal changed by read-write photelectric receiver by read-write judging module again, convert corresponding digital signal to, and output to read-write demodulating and decoding module; Digital signal is carried out demodulating and decoding by R3, read-write demodulating and decoding module, converts original information to and exports Read-write Catrol module to; The information that R4, Read-write Catrol module export read-write demodulating and decoding module, carries out analyzing and processing.
2) read write line sends read-write visible ray information to VL label, and VL label receives the read-write visible ray information from read write line.
In read write line end: S1, Read-write Catrol module, information to be sent is inputed to read-write modulating-coding module; S2, read-write modulating-coding module are carried out modulating-coding to the information that Read-write Catrol module exports, and are outputted to read-write driver module; S3, read-write driver module, according to the information through modulating-coding, drive read-write optical transmitting set to send read-write visible ray information.
Receive the read-write visible ray information sent from read-write optical transmitting set at VL tab end: R1, label photelectric receiver, and change corresponding analog electrical signal; R2, the analog electrical signal changed by label photelectric receiver by label judging module again, convert corresponding digital signal to, and output to label demodulating and decoding module; Digital signal is carried out demodulating and decoding by R3, label demodulating and decoding module, converts original information to and exports Read-write Catrol module to; The information that R4, VL label control module exports label demodulating and decoding module, carries out analyzing and processing.
(5), after the VL label described in and each module of read write line power on and normally work, before read write line and VL label carry out exchanges data, will set up communication link by two-way identification authentication mode, step is:
L1:VL label sends a data RB to read write line.
L2: after read write line receives data RB, read write line adopts verify data MR and algorithm FunM (x) of internal storage, obtain RB1 to after data RB process, a data RA of RB1 and read write line forms ANS AB, and sends a reply data ANS AB to VL label.
After L3:VL label receives ANS AB, RB1 is extracted from ANS AB, with the verify data MK in VL label and algorithm DFunM (x), RB1 part in ANS AB is resolved and obtains RB2, and verify ANS AB that in the data RB that sent by the VL label of L1 and step L3, VL label receives resolve in RB2, whether consistent, that is: whether RB equals RB2.If read write line verify data MR and algorithm FunM (x) and the verify data MK in VL label and algorithm DFunM (x), match, will have RB=RB2, namely verification correctly, enters L4; Otherwise cannot, by verification, stop to establish the link.
L4: if the verification of RB=RB2 is correct in L3, then obtain RA1 after the data MK of VL label internal storage and algorithm DFunM (x) carry out calculation process to RA, and generate reply data ANS BA with RA1, then send ANS BA to read write line.
L5: after read write line receives reply data ANS BA, to resolve the RA1 in reply data ANS BA with the verify data MR deposited in read write line and algorithm FunM (x) and obtains RA2; And the RA2 verified in the ANS BA that the data RA that sent out by read write line in L2 and read write line receive, whether consistent, that is: whether RB equals RB2.If read write line verify data MR and algorithm FunM (x) and the verify data MK in VL label and algorithm DFunM (x), match, will have RA=RA2, namely verification correctly, sets up communication link; Otherwise cannot, by verification, stop to establish the link.
VL label of the present invention, without the need to powered battery, decreases the pollution of battery, also removes the trouble changing battery from; Simultaneously owing to adopting the signal of communication of visible light wave range not by the interference of electromagnetic field, also do not produce electromagnetic signal interference, electromagnetic pollution, security is good, is a kind of communication mode of environmental protection; Meanwhile, communicate optical signal has illumination functions concurrently, can provide illumination in short-term, make read-write process more convenient for read-write process; VL label construction function is simple, can be made into small-sized micromodule equipment; Device read-write adopts contactless mode, reads and writes easy.The charging of passive visible ray label of the present invention and read write line and bidirectional recognition method, can the portable use scheme of magnetic card or Radio Frequency ID card as an alternative, overcome that such as information storage is little, security is not high, design is complicated, with high costs, electromagnetic interference (EMI) is large, radiation is large.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of embodiment of the present invention equipment therefor.
Mark in figure: 1-Read-write Catrol module; 2-communication module; 3-power module; 4-reads and writes demodulating and decoding module; 5-reads and writes modulating-coding module; 6-electric energy sending module; 7-reads and writes judging module; 8-reads and writes driver module; 9-power transmission coil; 10-label driver module; 11-label judging module; 12-tag modulates coding module; 13-label demodulating and decoding module; 14-electric energy receiver module; 15-label control module; 16-replys visible ray information; 17-reads and writes visible ray information; 18-wireless electromagnetic energy; 19-reads and writes photelectric receiver; 20-label photelectric receiver; 21-reads and writes optical transmitting set; 22-label optical transmitting set; 23-electricity reception coil.
Embodiment
embodiment:
(1) arrange a kind of passive visible ray label and read-and-write device, this device comprises read write line and VL label; Read write line is made up of Read-write Catrol module 1, read-write demodulating and decoding module 4, read-write judging module 7, read-write modulating-coding module 5, read-write driver module 8, electric energy sending module 6, communication module 2, read-write photelectric receiver 19, read-write optical transmitting set 21, power transmission coil 9, power module 3; VL label is made up of label control module 15, label demodulating and decoding module 13, label judging module 11, tag modulates coding module 12, label driver module 10, electric energy receiver module 14, label photelectric receiver 22, label optical transmitting set 20, electricity reception coil 23; Read-write Catrol module 1 connects read-write demodulating and decoding module 4, read-write modulating-coding module 5, electric energy sending module 6, communication module 2, power module 3, power module 3 connects read-write demodulating and decoding module 4, read-write judging module 7, read-write modulating-coding module 5, read-write driver module 8, electric energy sending module 6, communication module 2, read-write judging module 7 connects read-write photelectric receiver 19, read-write demodulating and decoding module 4, read-write driver module 8 connects read-write optical transmitting set 21, read-write modulating-coding module 5, and electric energy sending module 6 connects power transmission coil 9; Label control module 15 connects label demodulating and decoding module 13, tag modulates coding module 12, electric energy receiver module 14, electric energy receiver module 14 connects label demodulating and decoding module 13, label judging module 11, tag modulates coding module 12, label driver module 10, electric energy receiver module 14, label photelectric receiver 22, label optical transmitting set 20, electricity reception coil 23, label judging module 11 connects label photelectric receiver 22, label demodulating and decoding module 13, and label driver module 11 connects label optical transmitting set 20, tag modulates coding module 12; Read-write optical transmitting set 21 is corresponding with label photelectric receiver 22 by read-write visible ray information 17, label optical transmitting set 20 is corresponding with read-write photelectric receiver 19 by response visible ray information 16, and the power transmission coil 9 of read write line is corresponding with the electricity reception coil 23 of VL label by wireless electromagnetic energy 18.
Described read write line is for utilizing the mode of visible light communication, read-write visible ray information 17 is sent to VL label, and the response visible ray information 16 received from VL label, with the data reading between realization with VL label or write operation, analyze, process, verify, store the information receiving VL label, communicate with external unit, and provide electric energy to VL label.
Each functional module that described power module 3 is read write line provides electric energy.
Described Read-write Catrol module 1 is for carrying out function control to each module of read write line, and read-write, storage data, analyzing and processing, verifies the VL label information received.
Described read-write photelectric receiver 19 for responding to the visible ray information 16 from VL label, and converts corresponding electric signal to.
Described read-write judging module 7, for receiving the electric signal after changing from read-write photelectric receiver 19, converts digital signal to.
Described read-write demodulating and decoding module 4, for the digital signal exported read-write judging module 7, carries out demodulation, decoding.
The data-signal that described read-write modulating-coding module 5 pairs of Read-write Catrol modules 1 are sent is encoded, and is modulated into the signal of applicable wireless optical channel transmission.
The signal of described read-write driver module 8 for sending according to read-write modulating-coding module 5, drives read-write optical transmitting set 21 to send read-write visible ray information 17.
Described communication module 2 communicates for setting up with external unit, realizes data interaction, mechanism controls.
Described read-write optical transmitting set 21, under the effect of read-write driver module 8, sends read-write visible ray information 17.
Described electric energy sending module 6 is for generation of the electric power signal being applicable to wireless power transmission.
Described power transmission coil 9, for the electric power signal produced by electric energy sending module 6, sends, and forms charged electrical magnetic field, externally provides wireless electromagnetic energy 18.
Described VL label is powered from the wireless electromagnetic energy 18 that read write line obtains and works on power, in the mode of visible light communication, response visible ray information 16 is sent to read write line, receive the read-write visible ray information 17 from read write line, with the data reading between realization with read write line or write operation, analyze, verify, store, process the information receiving read write line.
Described label control module 15, for carrying out function control to each module of read write line, is read and write, is stored data, the information of the VL label that analyzing and processing receives.
Described electricity reception coil 23 for responding to the wireless electromagnetic energy 18 received from power transmission coil 9, and is collected with electric energy receiver module 14.
The wireless electromagnetic energy 18 that described electric energy receiver module 14 senses for collecting electricity reception coil 23, for being each module supply of electrical energy of label.
The various information that described tag modulates coding module 12 pairs of label control modules 15 are sent are encoded, and are modulated into the signal of applicable wireless optical channel transmission.
The signal of described label driver module 10 for sending according to tag modulates coding module 12, drives label optical transmitting set 20 to send response visible ray information 16.
Described label optical transmitting set 20 is for sending response visible ray information 16.
Described label photelectric receiver 22 for receiving the read-write visible ray information 17 sent from label, and converts corresponding electric signal to.
Described label judging module 11, for the electric signal sent by label photelectric receiver 22, converts digital signal to.
Described label demodulating and decoding module 13, for the digital signal exported label judging module 11, is carried out demodulation, and is decoded.
(2) the passive visible ray label described in and the power supply of read-and-write device and Starting mode, step is as follows:
Holding state is entered after P1, read write line power on, under holding state, power module 3 is only powered to electric energy sending module 6 and power transmission coil 9, electric energy sending module 6 and power transmission coil 9 are in light condition, form the read write line perform region that externally can provide wireless electromagnetic energy 18.
P2, VL label is when the perform region away from read write line, be in passive state, do not work, after VL label enters the perform region of read write line, obtain wireless electromagnetic energy 18 to work on power, electricity reception coil can produce an induction field to power transmission coil 9 simultaneously, and the mutual inductance effect that this induction field and power transmission coil 9 produce can cause the electromagnetic parameter of the electromagnetic field between electricity reception coil 23 and power transmission coil 9 to change.
After P3, electric energy sending module 6 and power transmission coil 9 sense the change of the electromagnetic parameter caused by mutual inductance effect, electric energy sending module 6 just sends enabling signal to power module 3, power module 3 provides electric energy to other functional modules of read write line, the each module of read write line all powers on and enters normal operating conditions, just can communicate with VL label.
(3) the VL label described in and read write line be operated in duplex communication mode, at read write line to the downlink communication channel of VL label and VL label to the uplink communication channel of read write line, adopt the band of two groups of different-wavebands to lead to filter respectively, ensure that two channels can not disturb mutually.
(4) the VL label described in enters into read write line perform region, and obtain electric energy, after VL label and each module of read write line all work on power, both communication is divided into two processes:
1) the VL label described in sends response visible ray information 16 to read write line, and read write line receives the response visible ray information 17 from VL label.
The following steps are had in VL tab end:
Information to be sent is inputed to tag modulates coding module 12 by S1, VL label control module 15.
The information that S2, the tag modulates coding module 12 pairs of VL label control modules 15 export, after carrying out modulating, encoding, and outputs to label driver module 10.
S3, label driver module 10, according to the information through modulating-coding, drive the response of label optical transmitting set 20 to send visible ray information 16.
The following steps are had at read write line end:
R1, read-write photelectric receiver 19 receive the response visible ray information 16 sent from VL label optical transmitting set 20, and convert corresponding electric signal to.
R2, the analog electrical signal changed by read-write photelectric receiver 19 by read-write judging module 7 again, convert corresponding digital signal to, and output to read-write demodulating and decoding module 4.
Digital signal is carried out demodulating and decoding by R3, read-write demodulating and decoding module 4, converts original information to and exports Read-write Catrol module 1 to.
The information that R4, Read-write Catrol module 1 export read-write demodulating and decoding module 4, carries out analyzing and processing.
2) read write line described in sends the read-write visible ray information 16 of read-write visible ray information 17, VL label reception from read write line to VL label.
The following steps are had at read write line end:
Information to be sent is inputed to read-write modulating-coding module 5 by S1, Read-write Catrol module 1.
The information that S2, read-write modulating-coding module 5 pairs of Read-write Catrol modules 1 export carries out modulating-coding, and outputs to read-write driver module 8.
S3, read-write driver module 8, according to the information through modulating-coding, drive read-write optical transmitting set 21 to send read-write visible ray information 17.
The following steps are had in VL tab end:
R1, label photelectric receiver 22 receive the read-write visible ray information 17 sent from read-write optical transmitting set 21, and change corresponding analog electrical signal.
R2, the analog electrical signal changed by label photelectric receiver 22 by label judging module 11 again, convert corresponding digital signal to, and output to label demodulating and decoding module 13.
Digital signal is carried out demodulating and decoding by R3, label demodulating and decoding module 13, converts original information to and exports VL label control module 15 to.
The information that R4, VL label control module 15 pairs of label demodulating and decoding modules 13 export, carries out analyzing and processing.
(5) mode that the VL label described in and read write line set up communication link is as follows:
VL label enters into read write line perform region, obtains electric energy, after VL label and each module of read write line all work on power, before read write line and VL label carry out normal exchanges data, first will by two-way identification authentication mode, and set up communication link, step is as follows:
L1:VL label sends a data RB to read write line.
L2: after read write line receives data RB, read write line adopts verify data MR and algorithm FunM (x) of internal storage, obtain RB1 to after data RB process, a data RA of RB1 and read write line forms ANS AB, and sends a reply data ANS AB to VL label.
After L3:VL label receives ANS AB, RB1 is extracted from ANS AB, with the verify data MK in VL label and algorithm DFunM (x), RB1 part in ANS AB is resolved and obtains RB2, and verify ANS AB that in the data RB that sent by the VL label of L1 and step L3, VL label receives resolve in RB2, whether consistent, that is: whether RB equals RB2.If read write line verify data MR and algorithm FunM (x) and the verify data MK in VL label and algorithm DFunM (x), match, will have RB=RB2, namely verification correctly, enters L4; Otherwise cannot, by verification, stop to establish the link.
L4: if the verification of RB=RB2 is correct in L3, then obtain RA1 after the data MK of VL label internal storage and algorithm DFunM (x) carry out calculation process to RA, and generate reply data ANS BA with RA1, then send ANS BA to read write line.
L5: after read write line receives reply data ANS BA, to resolve the RA1 in reply data ANS BA with the verify data MR deposited in read write line and algorithm FunM (x) and obtains RA2; And the RA2 verified in the ANS BA that the data RA that sent out by read write line in L2 and read write line receive, whether consistent, that is: whether RB equals RB2.If read write line verify data MR and algorithm FunM (x) and the verify data MK in VL label and algorithm DFunM (x), match, will have RA=RA2, namely verification correctly, sets up communication link; Otherwise cannot, by verification, stop to establish the link.
Claims (1)
1. the charging of passive visible ray label and read write line and a bidirectional recognition method, is characterized in that concrete steps are:
(1) a kind of passive visible ray label and read-and-write device are set, device comprises VL label, read write line, and read write line is made up of Read-write Catrol module, read-write demodulating and decoding module, read-write judging module, read-write modulating-coding module, read-write driver module, electric energy sending module, communication module, read-write photelectric receiver, read-write optical transmitting set, power transmission coil, power module; VL label is made up of label control module, label demodulating and decoding module, label judging module, tag modulates coding module, label driver module, electric energy receiver module, label photelectric receiver, label optical transmitting set, electricity reception coil; Read-write Catrol model calling read-write demodulating and decoding module, read-write modulating-coding module, electric energy sending module, communication module, power module, power module connects read-write demodulating and decoding module, read-write judging module, read-write modulating-coding module, read-write driver module, electric energy sending module, communication module, read-write judging module connects read-write photelectric receiver, read-write demodulating and decoding module, read-write driver module connects read-write optical transmitting set, read-write modulating-coding module, and electric energy sending module connects power transmission coil; Label control module connects label demodulating and decoding module, tag modulates coding module, electric energy receiver module, electric energy receiver module connects label demodulating and decoding module, label judging module, tag modulates coding module, label driver module, electric energy receiver module, label photelectric receiver, label optical transmitting set, electricity reception coil, label judging module connects label photelectric receiver, label demodulating and decoding module, and label driver module connects label optical transmitting set, tag modulates coding module; Read-write optical transmitting set is corresponding with label photelectric receiver by read-write visible ray information, label optical transmitting set is corresponding with read-write photelectric receiver by response visible ray information, and the power transmission coil of read write line is corresponding with the electricity reception coil of VL label by wireless electromagnetic energy;
Described read write line is for utilizing the mode of visible light communication, read-write visible ray information is sent to VL label, and the response visible ray information received from VL label, with the data reading between realization with VL label or write operation, analyze, process, verify, store the information receiving VL label, carry out data communication with external unit, and provide electric energy to VL label;
Each functional module that described power module is read write line provides electric energy;
Described Read-write Catrol module is used for carrying out function control to each module of read write line, read-write, storage data, and analyzing and processing, verifies the VL label information received, carry out exchanges data by communication module and external unit;
Described read-write photelectric receiver for responding to the response visible ray information from VL label, and converts corresponding electric signal to;
Described read-write judging module receives the electric signal after from the conversion of read-write photelectric receiver for reading and writing, and converts digital signal to;
Described read-write demodulating and decoding module is used for the digital signal exported read-write judging module, carries out demodulation, decoding;
Described read-write modulating-coding module is encoded to the data-signal that Read-write Catrol module is sent, and is modulated into the signal of applicable wireless optical channel transmission;
Described read-write driver module is used for the signal sent according to read-write modulating-coding module, drives read-write optical transmitting set to send read-write visible ray information;
Described communication module is used for setting up with external unit communicating, and external device sends data, receives the data of external unit, realizes data interaction, mechanism controls;
Described read-write optical transmitting set is used under the effect of read-write driver module, sends read-write visible ray information;
Described electric energy sending module is for generation of the electric power signal being applicable to wireless power transmission;
Described power transmission coil is used for the electric power signal produced by electric energy sending module, sends, and forms charged electrical magnetic field;
Described VL label is powered by the radio energy obtained from read write line and works on power, in the mode of visible light communication, response visible ray information is sent to read write line, receive the read-write visible ray information from read write line, read or write operation with the information realized between read write line, analyze, verify, store, process the information receiving read write line;
Described label control module is used for carrying out function control to each module of VL label, read-write, storage data, the read write line data message that analyzing and processing receives;
Described electricity reception coil for responding to the radio magnetic energy received from power transmission coil, and accepts module collection with electric energy;
The radio magnetic energy that described electric energy receiver module senses for collecting electricity reception coil, for being each module supply of electrical energy of label;
Described tag modulates coding module is encoded to the various information that label control module is sent, and is modulated into the signal of applicable wireless optical channel transmission;
Described label driver module is used for the signal sent according to tag modulates coding module, drives label optical transmitting set to send response visible ray information;
Described label optical transmitting set is for sending response visible ray information;
Described label photelectric receiver for receiving the read-write visible ray information sent from read write line, and converts corresponding electric signal to;
Described label judging module is used for the electric signal sent by label photelectric receiver, converts digital signal to;
Described label demodulating and decoding module is used for the digital signal exported label judging module, carries out demodulation, and decodes;
(2) the passive visible ray label described in and the power supply of read-and-write device and Starting mode, step is as follows:
Enter holding state after P1, read write line power on, under holding state, power module is only to electric energy sending module and power transmission coil power supply, and electric energy sending module and power transmission coil are in light condition, forms the read write line perform region that externally can provide wireless electromagnetic energy;
P2, VL label is when the perform region away from read write line, be in passive state, do not work, after VL label enters the perform region of read write line, obtain wireless electromagnetic energy to work on power, electricity reception coil can produce an induction field to power transmission coil simultaneously, and the mutual inductance effect that this induction field and power transmission coil produce can cause the electromagnetic parameter of the electromagnetic field between electricity reception coil and power transmission coil to change;
After P3, electric energy sending module and power transmission coil transduces to the change of the electromagnetic parameter caused by mutual inductance effect, electric energy sending module just sends enabling signal to power module, power module provides electric energy to other functional modules of read write line, the each module of read write line all powers on and enters normal operating conditions, just can communicate with VL label;
(3) the VL label described in and the communication pattern of read write line, there are half-duplex and full duplex two kinds of modes, under way communication, at read write line to the downlink communication channel of VL label and VL label to the uplink communication channel of read write line, the band of two groups of different-wavebands is adopted to lead to filter respectively, the visible light wave range that the visible light wave range that uplink communication channel is selected and downlink communication channel are selected does not have overlapping, ensures that two channels can not disturb mutually;
(4) the VL label described in enters into read write line perform region, and obtain electric energy, after VL label and each module of read write line all work on power, both communication is divided into two processes:
1) VL label sends response visible ray information to read write line, and read write line receives the response visible ray information from VL label;
In VL tab end: information to be sent is inputed to tag modulates coding module by S1, VL label control module; The information that S2, tag modulates coding module export VL label control module, after carrying out modulating, encoding, and outputs to label driver module; S3, label driver module, according to the information through modulating-coding, drive label optical transmitting set to send response visible ray information;
Receive the response visible ray information sent from label optical transmitting set at read write line end: R1, read-write photelectric receiver, and convert corresponding electric signal to; R2, the analog electrical signal changed by read-write photelectric receiver by read-write judging module again, convert corresponding digital signal to, and output to read-write demodulating and decoding module; Digital signal is carried out demodulating and decoding by R3, read-write demodulating and decoding module, converts original information to and exports Read-write Catrol module to; The information that R4, Read-write Catrol module export read-write demodulating and decoding module, carries out analyzing and processing;
2) read write line sends read-write visible ray information to VL label, and VL label receives the read-write visible ray information from read write line;
In read write line end: S1, Read-write Catrol module, information to be sent is inputed to read-write modulating-coding module; S2, read-write modulating-coding module are carried out modulating-coding to the information that Read-write Catrol module exports, and are outputted to read-write driver module; S3, read-write driver module, according to the information through modulating-coding, drive read-write optical transmitting set to send read-write visible ray information;
Receive the read-write visible ray information sent from read-write optical transmitting set at VL tab end: R1, label photelectric receiver, and change corresponding analog electrical signal; R2, the analog electrical signal changed by label photelectric receiver by label judging module again, convert corresponding digital signal to, and output to label demodulating and decoding module; Digital signal is carried out demodulating and decoding by R3, label demodulating and decoding module, converts original information to and exports Read-write Catrol module to; The information that R4, VL label control module exports label demodulating and decoding module, carries out analyzing and processing;
(5), after the VL label described in and each module of read write line power on and normally work, before read write line and VL label carry out exchanges data, will set up communication link by two-way identification authentication mode, step is:
L1:VL label sends a data RB to read write line;
L2: after read write line receives data RB, read write line adopts verify data MR and algorithm FunM (x) of internal storage, obtain RB1 to after data RB process, a data RA of RB1 and read write line forms ANS AB, and sends a reply data ANS AB to VL label;
After L3:VL label receives ANS AB, RB1 is extracted from ANS AB, with the verify data MK in VL label and algorithm DFunM (x), RB1 part in ANS AB is resolved and obtains RB2, and verify ANS AB that in the data RB that sent by the VL label of L1 and step L3, VL label receives resolve in RB2, whether consistent, that is: whether RB equals RB2; If read write line verify data MR and algorithm FunM (x) and the verify data MK in VL label and algorithm DFunM (x), match, will have RB=RB2, namely verification correctly, enters L4; Otherwise cannot, by verification, stop to establish the link;
L4: if the verification of RB=RB2 is correct in L3, then obtain RA1 after the data MK of VL label internal storage and algorithm DFunM (x) carry out calculation process to RA, and generate reply data ANS BA with RA1, then send ANS BA to read write line;
L5: after read write line receives reply data ANS BA, to resolve the RA1 in reply data ANS BA with the verify data MR deposited in read write line and algorithm FunM (x) and obtains RA2; And the RA2 verified in the ANS BA that the data RA that sent out by read write line in L2 and read write line receive, whether consistent, that is: whether RB equals RB2; If read write line verify data MR and algorithm FunM (x) and the verify data MK in VL label and algorithm DFunM (x), match, will have RA=RA2, namely verification correctly, sets up communication link; Otherwise cannot, by verification, stop to establish the link.
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