CN109583545A - Vehicle location radio-frequency recognition system and its localization method based on antenna isolated array - Google Patents
Vehicle location radio-frequency recognition system and its localization method based on antenna isolated array Download PDFInfo
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- CN109583545A CN109583545A CN201910016884.2A CN201910016884A CN109583545A CN 109583545 A CN109583545 A CN 109583545A CN 201910016884 A CN201910016884 A CN 201910016884A CN 109583545 A CN109583545 A CN 109583545A
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
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Abstract
Vehicle location radio-frequency recognition system disclosed by the invention based on antenna isolated array, include: it is several interval be embedded in it is passive radio-frequency identification labeled in road ground, it is each it is passive radio-frequency identification labeled include radio frequency identification label chip, tag antenna coil, auxiliary antenna coil and connection controller；And one be fixedly mounted on vehicle-mounted reader on vehicle, the vehicle-mounted reader includes radio-frequency identification reader, reader tuner module, reader antenna coil, label excitation array element, excitation array element tuner module and excitation array element controller.Also disclose a kind of localization method of above-mentioned vehicle location radio-frequency recognition system based on antenna isolated array.Under using identical passive radio frequency identification magnetic coupling signal frequency large-sized excitation and data communication antenna can be used, to realize farther access distance in the present invention.
Description
Technical field
The present invention relates to Vehicular automatic driving technical field more particularly to a kind of vehicle locations based on antenna isolated array
Radio-frequency recognition system and its localization method.
Background technique
Vehicular automatic driving technology is the hot spot of current research and industrialization, specially the Vehicular automatic driving of scene, such as
The unmanned automatic driving of the container transshipment vehicle at harbour, comes into the application stage.Automatic vehicle positioning is to realize to drive automatically
One of key foundation technology sailed.Known at present using the area grid positioning of super broad band radio communication, laser radar environmental characteristic
Not and matching, micro-mechanical gyroscope/technologies such as the navigation of accelerograph inertial positioning and satellite positioning are all in automatic Pilot technology
On have corresponding technology and product.In addition to this, it passive is penetrated there are also a kind of using vehicle-mounted radio-frequency identification reader and road are pre-buried
The technology of frequency identification tag.The area grid of the technology and super broad band radio communication positioning, laser radar environmental characteristic identification and
The technologies such as matching are different, and the vehicle positioning technology based on passive radio frequency identification is embedded in using mature RFID tag
Passive RF label in road is low in cost, the service life is long, environment influences small, is known by configuring specific passive RF on vehicle
Other reader, by the grid reader antenna of subdivision identify the pre-buried RFID tag with unique encodings to movement or
Static vehicle is positioned, therefore the vehicle positioning technology based on passive radio frequency identification has that operation cost is relatively low, ring
Border is adaptable, high reliablity, is easy to the advantages that disposing, and has had in the automatic Pilot field of harbour container transit vehicle
The utilization of certain scale.
GermanyCompany is based on current 125.134KHz (low-frequency range) and 13.56MHz (RFID) passive RF
Identification technology develops the positioning system of Vehicular automatic driving application.Wherein, the passive radio-frequency identification labeled ruler of pre-buried road
It is very little be diameter 74.5mm, height 35mm, vehicle-mounted reader antenna size 1560mm × 653mm × 81mm, can be realized 25 kilometers/
The positioning accuracy of ± 10mm under hour speed.With it is common it is passive radio-frequency identification labeled compared with, built-in type for vehicle location
It is passive radio-frequency identification labeled mainly to be had a certain difference in encapsulation, but vehicle-mounted reader and common radio frequency identification are read
There is very big difference between device, this vehicle-mounted reader needs to realize longer-distance access, while needing in certain vehicle
Speed is lower to realize the access for meeting expected positioning accuracy.It especially realizes the access for meeting expected positioning accuracy, is by special
The grid antenna of design is come what is realized, i.e., by the antenna of subdivided meshes, the grid communicated according to realization is opposite to obtain vehicle
In the position of pre-buried label.Due to passive radio frequency identification access distance and antenna scale it is closely related, antenna it is thin
Subnetting lattice directly affect access distance again.Currently, GermanThe label and reader and grid antenna of company are in allusion quotation
The maximum access distance of 35cm can be achieved in the environment of type.
The existing vehicle positioning system based on magnetic coupling radio frequency knowledge technology is shown referring to Fig. 1, Fig. 1, vehicle 10 is in road
Road travels, and is equipped with radio-frequency identification reader 20 and radio-frequency identification reader antenna 30 on vehicle 10.When vehicle 10 and radio frequency
Identification reader antenna 30 by be embedded on road passive radio-frequency identification labeled 40 when, vehicle-mounted reader 20 can obtain nothing
The information of source RFID tag 40, and according to passive radio-frequency identification labeled 40 pre-buried geography information and passive radio frequency identification
The relativeness of label 40 and vehicle 10, it can realize the positioning of vehicle 10.
Referring to fig. 2, Fig. 2 shows it is existing based on magnetic coupling radio frequency know technology radio-frequency identification reader antenna with it is passive
The energy transmission and Principle of Communication of RFID tag.There is electric current inside the aerial coil 31 of radio-frequency identification reader antenna 30
By when, the alternating magnetic field 31a that inducts can be generated, passive radio-frequency identification labeled 40 aerial coil can generate induced electromotive force, nothing
The AC electromotive force of inducting that aerial coil generates can be transformed into chip operation institute by the chip circuit of source RFID tag 40
The power supply needed comes out the instruction from radio-frequency identification reader 20 from the signal extraction of coupling, executes instruction and makes corresponding
The communication between radio-frequency identification reader 20 and passive radio-frequency identification labeled 40 is completed in response.For magnetic coupling radio frequency identification skill
Art, RFID tag carry work near field, that is, 1.10 or 1/8 distance of electromagnetic wavelength used.Such as
The carrier frequency of 13.56MHz, wavelength are 22.1 meters, and theoretically, the magnetic coupling radio frequency identification maximum access distance under the wavelength is 2.2
Rice.But under Near Field, between radio-frequency identification reader antenna 30 it is vertical it is every increase by 10 times, energy attenuation 1/
1000, that is to say, that energy is according to inverse distance between passive radio-frequency identification labeled 40 and radio-frequency identification reader antenna 30
Cube decaying.Further, since the bandwidth of data communication needs, radio-frequency identification reader 20 and passive radio-frequency identification labeled 40
The network quality factor of aerial coil will be far below the intrinsic quality factor of coil antenna.Such as the quality factor of copper conductor coils
50 may be up to, however, to ensure that the bandwidth of data communication, the reader antenna of radio frequency identification and the product of label antenna network
Quality factor may only have 8.These factors result in magnetic coupling Radio Frequency Identification Technology effective access distance in the cards and are far below
Theoretical near field range.Referring to fig. 2,13.56MHz system, along 31 Vertical Square of aerial coil of radio-frequency identification reader antenna 30
To access distance may there was only 50~60 centimetres.In addition, larger sized radio-frequency identification reader antenna 30 also means day
The inductance of line coil is big, and carrier frequency is higher, then tunes more difficult；Using low wave frequency, then mean low data
Rate.
The actual access distance also further effective dimensions by the aerial coil 31 of radio-frequency identification reader antenna 30
Limitation, systematically access distance such in general is probably at 0.7 times or so of reader antenna size.Radio-frequency identification reader
Antenna 30 is smaller, and access distance is shorter.These features cause to use the magnetic coupling Radio Frequency Identification Technology of standard as vehicle location
It can have the disadvantage that the day that radio-frequency identification reader antenna 30 as small as possible is needed to obtain certain positioning accuracy
Line coil 31, but the aerial coil 31 of radio-frequency identification reader antenna 30 is smaller, it is meant that effectively access distance is shorter, for
Vehicular automatic driving positioning, it may be necessary at least 20~30 centimetres or more of effective access distance.If using 40 centimetres or more
Antenna will lead to obtainable positioning accuracy and substantially reduce.
In order to overcome deficiency existing for the above vehicle positioning system based on magnetic coupling Radio Frequency Identification Technology, Patent No.
The German patent of invention of DE202013101196U1 discloses the following contents: using low frequency carrier signal, that is, 125KHz/134KHz
Frequency range；The method that radio-frequency identification reader antenna overlay area uses grid subdivision simultaneously, as shown in figure 3, being subdivided into single
Access unit 31, to improve the precision of positioning.
Referring to fig. 4, the German patent of invention that Fig. 4 shows Patent No. DE202013101196U1 discloses used day
Wire grid sub-structure motivates winding EQ1-EQ2 and excitation winding EL1-EL2 by the region of entire radio-frequency identification reader antenna
It is divided into 16 grids, excitation winding RE is to receive winding and cover entire antenna access region, when one of Grid Signal
When for normal excitation, the Grid Signal on periphery is cancelled out each other, so that the label of corresponding grid position cannot be activated.It is swept by electronics
The mode retouched realizes the timesharing access of entire radio-frequency identification reader antenna overlay area.The radio frequency identification of the technical solution is read
The excitation winding for reading device antenna is very long, and the inductance of aerial coil is big, therefore uses low frequency band, consequently facilitating day lower network
Tuning is realized.
In order to realize suitable communication distance, can be realized by increasing the transmission power of radio-frequency identification reader, therefore
It needs to increase diode or similar structure in passive radio-frequency identification labeled antenna end to limit the electricity at label antenna both ends
Pressure, as shown in Figure 5.Antenna end AC0, AC1 of passive radio-frequency identification labeled chip 41 is connect with coil antenna Lant respectively, this is
The structure of basic RFID tag.Under the field strength of Larger Dynamic range, in order to protect passive radio-frequency identification labeled chip 41
Not by possible high-voltage breakdown, increased between antenna end AC0, AC1 of radio frequency identification label chip 41 by diode D1, D2
The protection structure of composition, under high field intensity, it is ensured that the voltage of antenna end AC0, AC1 of passive radio-frequency identification labeled chip 41 does not surpass
Cross the tolerance range of passive radio-frequency identification labeled chip 41.In addition, in the case where this requires stringent scene for operating distance, nothing
Source RFID tag 40 may also need additional passive radio-frequency identification labeled chip 41 external capacitor C1, C2 and resistance R1,
R2, to adjust the working performance of label.
Existing vehicle positioning system is relative to corresponding frequency band radio-frequency recognition system, either label or radio frequency identification
Reader and radio-frequency identification reader antenna will be complicated very much, but are limited by performance, are currently used primarily in 25 kilometers/hour
Or automatic Pilot positioning below.
Summary of the invention
The first technical problem to be solved by the present invention is: providing a kind of can be achieved far in view of the deficiencies of the prior art
Distance access reduces system complexity and cost, the vehicle location radio frequency based on antenna isolated array for improving system reliability
Identifying system.
The second technical problem to be solved by the present invention is: providing a kind of above-mentioned vehicle based on antenna isolated array
Position the localization method of radio-frequency recognition system.
The vehicle location radio-frequency recognition system based on antenna isolated array as first aspect present invention, comprising:
It is several interval be embedded in it is passive radio-frequency identification labeled in road ground, it is each it is passive radio-frequency identification labeled include penetrate
Frequency identification tag chip, tag antenna coil, auxiliary antenna coil and connection controller, the radio frequency identification label chip
First antenna connecting pin is connected to end connection, the second antenna connection terminal and the label with the first control of the connection controller
One end of aerial coil connects, and the other end of the tag antenna coil is connected to end with the second control of the connection controller and connects
It connects, the first, second AC coupled signals end of the connection controller is connect with the both ends of the auxiliary antenna coil respectively；With
And
One is fixedly mounted on the vehicle-mounted reader on vehicle, and the vehicle-mounted reader includes radio-frequency identification reader, reads
Device tuner module, reader antenna coil, label excitation array element, excitation array element tuner module and excitation array list
It is read respectively with described by the reader tuner module at first signal interaction end of cell controller, the radio-frequency identification reader
The both ends connection of device aerial coil is read, second signal interaction end is connect with vehicle positioning system, and the label motivates array list
Member is arranged in the reader antenna coil, and the label excitation array element is by several excitation coils in matrix arrangement
Winding is constituted, and one end of each excitation coil winding is connect after connecting together with the excitation array element tuner module,
The other end is connect with the excitation array element tuner module respectively using variable connector, the excitation array element controller
First signal interaction end is connect with the excitation array element tuner module, and second signal interaction end and vehicle positioning system connect
It connects.
In a preferred embodiment of the invention, the connection controller include rectification unit, the first, second capacitor with
And there is the first, second exchange end and the first, second DC terminal, the optoelectronic switch to have for optoelectronic switch, the rectification unit
First, second drive control end is connected to end with the first, second control, and the first, second exchange end of the rectification unit is made respectively
For it is described connection controller the first, second AC coupled signals end, the first, second DC terminal respectively with the optoelectronic switch
The first, second drive control end connection, the optoelectronic switch first, second control connection end controlled respectively as the connection
First, second control connection end of device processed, the both ends of the first capacitor are attempted by the first, second of the rectification unit respectively
It exchanges on end, the both ends of second capacitor are attempted by respectively on the first, second drive control end of the optoelectronic switch.
The above-mentioned vehicle location radio-frequency recognition system based on antenna isolated array of one kind as second aspect of the present invention
Localization method, comprising the following steps:
Step S1, the vehicle-mounted reader control the label by the excitation array element controller and motivate array list
The excitation coil winding of the first number is connected in member；
Step S2, the label motivate the excitation coil winding in array element in an ON state to passive radio frequency identification
Label sends auxiliary excitation connection signal；
Step S3, the vehicle-mounted reader control the reader antenna coil to nothing by the radio-frequency identification reader
Source RFID tag sends radio frequency identification access instruction；
Step S4, judges whether the radio-frequency identification reader receives from passive radio-frequency identification labeled answer signal,
If not receiving answer signal, S5 is entered step, if receiving answer signal, enters step S6；
Step S5, the vehicle-mounted reader control the label by the excitation array element controller and motivate array list
The excitation coil winding of Next Serial Number is connected in member, and return step S2；
Step S6, according to the present bit confidence of positional information calculation vehicle passive radio-frequency identification labeled in answer signal
Breath.
Due to using technical solution as above, the beneficial effects of the present invention are: the present invention is using identical passive
Under radio frequency identification magnetic coupling signal frequency, large-sized excitation and data communication antenna can be used, to realize farther visit
Ask distance；Meanwhile the access of higher speed is realized using the wave band of higher frequency, not only simplify reader antenna coil and its drive
Dynamic design reduces the complexity of system, improves the reliability of system, and realize higher performance with lower cost
Vehicle location function.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the existing vehicle positioning system based on magnetic coupling radio frequency knowledge technology.
Fig. 2 is the existing radio-frequency identification reader antenna based on magnetic coupling Radio Frequency Identification Technology and passive radio frequency identification mark
The energy transmission and Principle of Communication figure of label.
Fig. 3 is the antenna grid sub-structure figure of existing radio-frequency identification reader.
Fig. 4 is the antenna networks of the disclosed radio-frequency identification reader of Germany's invention of Patent No. DE202013101196U1
The structural schematic diagram of lattice subdivision.
Fig. 5 is existing passive radio-frequency identification labeled circuit diagram.
Fig. 6 is vehicle location radio-frequency recognition system structural schematic diagram of the invention.
Fig. 7 is passive radio-frequency identification labeled circuit structure schematic diagram of the invention.
Fig. 8 is the electrical block diagram of passive radio-frequency identification labeled connection controller of the invention.
Fig. 9 is the structural schematic diagram of reader antenna coil and label excitation array element of the invention.
Figure 10 is the flow chart of vehicle location radio-frequency recognition system of the invention.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Referring to Fig. 6, what is provided in figure is the vehicle location radio-frequency recognition system based on antenna isolated array, including several nothings
Source RFID tag 100 and vehicle-mounted reader 200.
Several passive radio-frequency identification labeled 100 are encapsulated in the support construction of the materials such as glass or epoxy resin, then lead to
Pre-buried or punching mode is crossed to be arranged at intervals in the road grounds such as pitch, concrete according to certain rule.Referring to Fig. 7, often
One passive radio-frequency identification labeled 100 includes radio frequency identification label chip 110, tag antenna coil 120, auxiliary antenna coil 130
And connection controller 140.The antenna connection terminal AC0 of radio frequency identification label chip 100 is connected to the control for connecting controller 140
AC01 connection is held, antenna connection terminal AC1 is connect with one end of tag antenna coil 120, the other end of tag antenna coil 120
With connect controller 140 control be connected to end AC02 connection, connection controller 140 AC coupled signals end k1, k2 respectively with
The both ends of auxiliary antenna coil 130 connect.
Referring to Fig. 8, connecting controller 140 includes rectification unit 141, capacitor C1, C2 and optoelectronic switch 142, and rectification is single
Member 141 has exchange end 141a, 141b and DC terminal 141c, 141d, and optoelectronic switch 142 has drive control end 142a, 142b
End 142c, 142d are connected to control, exchange end 141a, 141b of rectification unit 141 is respectively as the exchange for connecting controller 140
Coupled signal end k1, k2, DC terminal 141c, 141d are connect with drive control end 142a, 142b of optoelectronic switch 142 respectively,
Control connection end 142c, 142d of optoelectronic switch 142 is connected to end AC01, AC02, electricity respectively as the control of connection controller 140
The both ends for holding C1 are attempted by respectively on exchange end 141a, 141b of rectification unit 141, and the both ends of capacitor C2 are attempted by photoelectricity respectively
On drive control end 142a, 142b of switch 142.
Connecting the capacitor C1 between AC coupled signals end k1, k2 of controller 140 is tuning capacitance, rectification unit 141
It can be diode, Zener diode or metal-oxide-semiconductor structure, the AC coupled for inputting AC coupled signals end k1, k2
It is direct current that signal, which arranges, and the capacitor C2 of AC coupled signals end k1, k2 output end further smooths output voltage, provides stable
Direct current output, drive control end 142a, 142b of direct current output to optoelectronic switch 142.Drive control end 142a, 142b are one
Typical air transformer AC coupled, exchange turn the device of direct current, DC control optoelectronic switch.Passive radio-frequency identification labeled
It is placed in exciting field, if control connection end AC01, AC02 of connection controller 140 are not turned on, this is passive radio-frequency identification labeled
Effective antenna coupling circuit can not be formed, energy and access instruction cannot be effectively received, also cannot achieve the passback of data；Instead
It, if control connection end AC01, AC02 conducting of connection controller 140, this passive radio-frequency identification labeled 100 can be normal
It receives coupling energy and carries out data transmission.The resonant network that auxiliary antenna coil 130 and tuning capacitance C1 are constituted works in not
It is same as the carrier frequency of radio frequency identification, and using the resonant network of high quality factor, for coupling the efficient, remote of energy
Transmission.
Further, it is contemplated that the effective overlay area of antenna of current vehicle positioning, such as 1000mm × 500mm.Consider general
Magnetic coupling radio frequency identification product, for example, 125/134KHz low-frequency technology or 13.56MHz high frequency technique, without increase send out
The stabilized communication of 50cm~60cm can be realized by penetrating power.In conjunction with above-mentioned label and general radio-frequency identification reader, into
One step, the present invention is on the basis of reader antenna, by increasing independent, subdivided meshes, alien frequencies excitation coil, for controlling
Passive radio-frequency identification labeled 100 connection controller 140 it is open close, reader antenna grid subdivision can be realized, to realize
High-precision positioning.
Vehicle-mounted reader 200 is fixedly mounted on vehicle, including radio-frequency identification reader 210, reader tuner module
220, reader antenna coil 230, label excitation array element 240, excitation array element tuner module 250 and excitation array
Cell controller 260.The signal interaction end 211 of radio-frequency identification reader 210 by reader tuner module 220 respectively with reading
The both ends of device aerial coil 230 connect, and signal interaction end 212 is connect with vehicle positioning system 1, reader antenna coil 230
Be both transmitting antenna and receiving antenna, for the aerial coil of a typical 1000mm × 500mm, may be implemented 50cm~
The communication distance of 60cm, the radiofrequency signal for being driven to carrier frequency fc of the reader antenna coil 230.Label motivates array list
Member 240 is arranged in reader antenna coil 230, referring to Fig. 9 and combines Fig. 6, label motivates array element 240 by 3 × 8 totally 24
A excitation coil winding 241 in matrix arrangement is constituted, and one end of each excitation coil winding 241 shares after connecting together
One coil connectors lc1 is connect with excitation array element tuner module 250, and the other end uses variable connector and coil connectors
Lc2 is connect with excitation array element tuner module 250 respectively, and coil connectors lc1, lc2 are driven by the pumping signal that frequency is fa.
The signal interaction end 261 of array element controller 260 is motivated to connect with excitation array element tuner module 250, signal interaction
End 262 is connect with vehicle positioning system 1.
Referring to Figure 10, what is provided in figure is the vehicle location radio-frequency recognition system of the invention based on antenna isolated array
Localization method, comprising the following steps:
Step S1, vehicle-mounted reader 200 motivate array element 240 by excitation 210 abstract factory of array element controller
In first number excitation coil winding 241 connect；
Step S2, label motivate the excitation coil winding 241 in array element 240 in an ON state to know to passive RF
Distinguishing label 100 sends auxiliary excitation connection signal；
Step S3, vehicle-mounted reader 200 control reader antenna coil 230 to passive by radio-frequency identification reader 210
RFID tag 100 sends radio frequency identification access instruction；
Step S4, judges whether radio-frequency identification reader 210 receives the response letter from passive radio-frequency identification labeled 100
Number, if not receiving answer signal, S5 is entered step, if receiving answer signal, enters step S6；
Step S5, vehicle-mounted reader 210 motivate array element 240 by excitation 260 abstract factory of array element controller
The excitation coil winding 241 of middle Next Serial Number is connected, and return step S2；
Step S6, according to the present bit confidence of positional information calculation vehicle passive radio-frequency identification labeled in answer signal
Breath.
The present invention does not change current radio-frequency identification reader 210 and reader antenna coil 230, retains to greatest extent
The access distance of radio frequency identification motivates array element by increasing label in the access profile of reader antenna coil 230
240, increase the connection of excited target signal control between passive radio-frequency identification labeled 100 and reader antenna coil 230.Due to
Passive radio-frequency identification labeled 100 connection controller 140 has high quality factor, and energy transmission efficiency is high, and small ruler can be used
Very little antenna obtains satisfied energy transmission effect in the distance range of needs, is realizing that passive radio-frequency identification labeled position is thin
Divide the access distance and traffic rate that radio frequency identification is maintained while access, so that simpler system, lower cost are real
Existing highly reliable and higher rate radio frequency identification communicates, so that the automatic Pilot for vehicle provides better radio frequency identification positioning function
Energy.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (3)
1. the vehicle location radio-frequency recognition system based on antenna isolated array characterized by comprising
It is several interval be embedded in it is passive radio-frequency identification labeled in road ground, it is each it is passive radio-frequency identification labeled include radio frequency know
Distinguishing label chip, tag antenna coil, auxiliary antenna coil and connection controller, the first of the radio frequency identification label chip
Antenna connection terminal is connected to end connection, the second antenna connection terminal and the label antenna with the first control of the connection controller
One end of coil connects, and the other end of the tag antenna coil is connected to end connection with the second control of the connection controller,
First, second AC coupled signals end of the connection controller is connect with the both ends of the auxiliary antenna coil respectively；And
One is fixedly mounted on the vehicle-mounted reader on vehicle, and the vehicle-mounted reader includes radio-frequency identification reader, reader tune
Humorous module, reader antenna coil, label excitation array element, excitation array element tuner module and excitation array element control
Device processed, the first signal interaction end of the radio-frequency identification reader by the reader tuner module respectively with the reader
The both ends of aerial coil connect, and second signal interaction end is connect with vehicle positioning system, and the label excitation array element is set
It sets in the reader antenna coil, the label excitation array element is by several excitation coil windings in matrix arrangement
It constitutes, one end of each excitation coil winding is connect after connecting together with the excitation array element tuner module, another
End is connect with the excitation array element tuner module respectively using variable connector, and the first of the excitation array element controller
Signal interaction end is connect with the excitation array element tuner module, and second signal interaction end is connect with vehicle positioning system.
2. as described in claim 1 based on the vehicle location radio-frequency recognition system of antenna isolated array, which is characterized in that described
Connection controller includes rectification unit, the first, second capacitor and optoelectronic switch, and the rectification unit has first, second to hand over
End and the first, second DC terminal are flowed, there is the optoelectronic switch the first, second drive control end to be connected to the first, second control
End, the first, second exchange end of the rectification unit is respectively as first, second AC coupled signals for connecting controller
End, the first, second DC terminal are connect with the first, second drive control end of the optoelectronic switch respectively, the optoelectronic switch
First, second control connection end respectively as it is described connection controller first, second control connection end, the first capacitor
Both ends be attempted by respectively the rectification unit first, second exchange end on, the both ends of second capacitor are attempted by respectively
On first, second drive control end of the optoelectronic switch.
3. a kind of positioning side of the vehicle location radio-frequency recognition system based on antenna isolated array as claimed in claim 1 or 2
Method, which comprises the following steps:
Step S1, the vehicle-mounted reader control the label by the excitation array element controller and motivate in array element
The excitation coil winding of first number is connected；
Step S2, excitation coil winding in the label excitation array element in an ON state is to passive radio-frequency identification labeled
Send auxiliary excitation connection signal；
Step S3, the vehicle-mounted reader control the reader antenna coil by the radio-frequency identification reader and penetrate to passive
Frequency identification tag sends radio frequency identification access instruction；
Step S4, judges whether the radio-frequency identification reader receives from passive radio-frequency identification labeled answer signal, if not having
Answer signal is received, then enters step S5, if receiving answer signal, enters step S6；
Step S5, the vehicle-mounted reader control the label by the excitation array element controller and motivate in array element
The excitation coil winding of Next Serial Number is connected, and return step S2；
Step S6, according to the current location information of positional information calculation vehicle passive radio-frequency identification labeled in answer signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910016884.2A CN109583545B (en) | 2019-01-08 | 2019-01-08 | Vehicle positioning radio frequency identification system based on antenna isolation array and positioning method thereof |
Applications Claiming Priority (1)
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