CN207541642U - Radio-frequency identification reader/writer and Roadside Parking management system based on multizone identification - Google Patents

Abstract

The utility model provides a kind of radio-frequency identification reader/writer based on multizone identification and Roadside Parking management system, wherein radio-frequency identification reader/writer includes read-write rear end and at least one acquisition front end, the read-write rear end includes back end communications processing unit, the acquisition front end includes front end communication processing unit, and the back end communications processing unit is connect with the front end communication processing unit realizes digital signal forwarding to ensure that radio frequency identification is realized in the control acquisition front end in the read-write rear end；The read-write rear end is for identifying control and safety certification, and the acquisition front end implements the transmitting-receiving of radiofrequency signal according to the identification control that the read-write rear end provides and demodulation is modulated.The utility model can reduce the cost that radio-frequency identification reader/writer is laid out under multizone identification scene, ensure the effect of radio frequency identification, be improved particularly the efficiency of the applications such as Roadside Parking.

Description

Radio-frequency identification reader/writer and Roadside Parking management system based on multizone identification

Technical field

The utility model is related to technical field of RFID more particularly to a kind of radio frequency identification readings based on multizone identification Write device and Roadside Parking management system.

Background technology

Vehicle electric sub-mark is a kind of radio frequency recognizing electronic label in front windshield of vehicle, passes through radio frequency Identification reader transceiving radio frequency signal is identified at a distance with vehicle electric sub-mark, so as to fulfill the management to vehicle.It penetrates Frequency identification reader is received after the information of motor vehicle electronic identification feedback, it is also necessary to is further processed, such as control is penetrated Vehicle identification information is sent to central server etc. by frequency identification process.In addition, in order to meet motor vehicle electronic identification standard rule Fixed security requirement needs to realize two-way authentication and data encrypting and deciphering using security module.And realize above-mentioned requirement, just must Corresponding device must be configured, these devices considerably increase the cost of radio-frequency identification reader/writer entirety.

For in the scene of multizone identification, requirement is identified in order to meet the independent of each region, if to each region A radio-frequency identification reader/writer is respectively configured, cost will be high, it is easy to excess budget.Implementation for the same section of road Scheme, typically a radio-frequency identification reader/writer connect mutiple antennas to meet the identification requirement in different tracks by feeder line, but Be premise be also founded only upon identification region it is few and closer to the distance between each other.

By taking Roadside Parking as an example, each parking stall is equivalent to an independent identification region, needs to obtain by radio frequency identification The seizure condition on each parking stall and the identity that parks cars are obtained, a radio-frequency identification reader/writer is installed to each parking stall obviously not Reality.If borrowing above-mentioned road section embodiment, in each parking stall mounted antennas, same penetrate is connected by feeder line Frequency identification reader, one side feeder line wiring cost is high, and another aspect feeder line long distance transmission radiofrequency signal can be brought very big Attenuation, cannot substantially reach normal radio frequency identification effect.

Utility model content

The purpose of this utility model is to provide a kind of radio-frequency identification reader/writers based on multizone identification, solve existing The technical issues of radio-frequency identification reader/writer is laid out of high cost during multizone identification in technology, and radio frequency identification effect is poor.

The another object of the utility model is to provide a kind of Roadside Parking management system solve trackside in the prior art The technical issues of parking management is inefficient, and electronic realization method is of high cost.

In order to solve the above-mentioned technical problem, a kind of radio-frequency identification reader/writer based on multizone identification of the utility model, It is characterised in that it includes read-write rear end and at least one acquisition front end, the read-write rear end includes back end communications processing unit, institute It states acquisition front end and includes front end communication processing unit, the back end communications processing unit is connect with the front end communication processing unit Digital signal forwarding is realized to ensure that radio frequency identification is realized in the control acquisition front end in the read-write rear end；

For identifying control and safety certification, the acquisition front end is provided according to the read-write rear end for the read-write rear end The transmitting-receiving of radiofrequency signal and demodulation modulation are implemented in identification control.

As being further improved for the above-mentioned radio-frequency identification reader/writer based on multizone identification of the utility model, the read-write The back end communications processing unit of rear end includes several gating interfaces, several gating interfaces are supported to connect several correspondences simultaneously Acquisition front end, it is described read-write rear end pass through connection several acquisition front ends realize multizones identify.

As being further improved for the above-mentioned radio-frequency identification reader/writer based on multizone identification of the utility model, the read-write Bus network is provided between rear end and several acquisition front ends, and the back end communications processing unit of the read-write rear end described is adopted The front end communication processing unit of collection front end connects the bus network simultaneously, and the read-write rear end is realized by the bus network With the digital signal communication between the acquisition front end.

As being further improved for the above-mentioned radio-frequency identification reader/writer based on multizone identification of the utility model, the bus Network is CAN bus, the CAN bus include low level CAN bus and high level CAN bus, the low level CAN bus with Access terminal build-out resistor between the high level CAN bus.

As being further improved for the above-mentioned radio-frequency identification reader/writer based on multizone identification of the utility model, the read-write Rear end includes the security module of the first control module and connection first control module, and first control module is to corresponding Acquisition front end is identified control or obtains the information of the acquisition front end feedback, first control module and the safe mould Block interaction is to obtain encryption and decryption information.

It is further improved as the above-mentioned radio-frequency identification reader/writer based on multizone identification of the utility model, described first Control module includes MCU and CPU, MCU are used to carry out digital signal communication with acquisition front end and be handed over the security module Mutually, CPU is used to carry out data processing according to the solution confidential information that security module provides or be sent by MCU to corresponding acquisition front end Configuration information and telecommunication management is carried out by the network of connection and central server.

As being further improved for the above-mentioned radio-frequency identification reader/writer based on multizone identification of the utility model, the acquisition Front end includes the second control module and mutually isolated transmitting link and receives link, the antenna for transceiving radio frequency signal pass through Coupled apparatus is connect respectively with transmitting link, receives link, and second control module carries out digital letter with the read-write rear end Signal communication is modulated with controlling the receives link and emitting the transmitting-receiving of link and demodulate.

As being further improved for the above-mentioned radio-frequency identification reader/writer based on multizone identification of the utility model, the acquisition Front end specifically includes directional coupler, and the first end of the directional coupler is sequentially connected power amplifier unit, modulator, the second control Module to receive the transmitting signal that transmitting link generates, with transceiving radio frequency believed by the second end connection antenna of the directional coupler Number, the vector modulator connection that the third end of the directional coupler is controlled by second control module is offseted with providing carrier wave Signal, the 4th end of the directional coupler be sequentially connected modulator, filter amplification circuit, phase inverter, the second control module with Signal will be received by receives link and be supplied to second control module, second control module controls phaselocked loop to described Modulator, demodulator provide local oscillation signal.

In order to solve the above-mentioned technical problem, a kind of Roadside Parking management system of the utility model, including as described above Rear end and acquisition front end are read and write, column is provided on front side of each Roadside Parking position, before the acquisition is installed on the column Hold the vehicle electric sub-mark to be installed on face vehicle.

As being further improved for the above-mentioned Roadside Parking management system of the utility model, the acquisition front end includes at least suitable It answers the first antenna of the first vehicle level identification and adapts to the second antenna of the second vehicle level identification, the first antenna and the Two antennas connect gateable day line options network to realize poll.

Compared with prior art, the utility model by radio-frequency identification reader/writer by being divided into read-write rear end and acquisition front end Two parts realize basic radio frequency processing by acquiring front end, and device of high cost is integrated in realization in read-write rear end is multiplexed, Digital signal communication is realized by communications processor element between read-write rear end and acquisition front end.The utility model can reduce multi-region The cost that radio-frequency identification reader/writer is laid out under domain identification scene, ensures the effect of radio frequency identification, has been improved particularly Roadside Parking etc. The efficiency of application.

After the detailed description of the utility model embodiment is read in conjunction with the figure, other features and advantages of the utility model It will become clearer.

Description of the drawings

It, below will be to embodiment party in order to illustrate more clearly of the utility model embodiment or the technical solution of the prior art Formula or attached drawing needed to be used in the description of the prior art are briefly described, it is therefore apparent that the accompanying drawings in the following description is only It is some embodiments described in the utility model, for those of ordinary skill in the art, is not paying creative labor Under the premise of dynamic, other attached drawings are can also be obtained according to these attached drawings.

Fig. 1 is radio-frequency identification reader/writer structure diagram in one embodiment of the utility model.

Fig. 2 is radio-frequency identification reader/writer star-shaped network structure schematic diagram in one embodiment of the utility model.

Fig. 3 is radio-frequency identification reader/writer bus network schematic diagram in one embodiment of the utility model.

Fig. 4 is that rear end structure schematic diagram is read and write in one embodiment of the utility model.

Fig. 5 is that front-end architecture schematic diagram is acquired in one embodiment of the utility model.

Fig. 6 is that radio-frequency identification reader/writer is applied to Roadside Parking schematic diagram in one embodiment of the utility model.

Specific embodiment

The utility model is described in detail below with reference to each embodiment shown in the drawings.But these embodiments The utility model is not intended to limit, structure, method or the work(that those of ordinary skill in the art are made according to these embodiments Transformation on energy is all contained in the scope of protection of the utility model.

It should be noted that in various embodiments, identical label or label may be used, but these not generations Absolute contact relationship in table structure or function.Also, also not generation such as " first " that is previously mentioned in each embodiment, " second " Absolute differentiation relationship in table structure or function, these are merely for convenience of description.

As shown in Figure 1, radio-frequency identification reader/writer structure diagram in one embodiment of the utility model.In present embodiment Radio-frequency identification reader/writer can realize that the identification of multizone, radio-frequency identification reader/writer include read-write rear end 10 and acquisition simultaneously before End 20 reads and writes rear end 10 and acquisition front end 20 and collectively constitutes complete radio-frequency identification reader/writer and realize radio frequency identification, in reality In, acquisition front end 20 is mounted on the radio frequency identification for being responsible for region in the region of each identification, specific identification control And the data processing work of identification information is realized by reading and writing rear end 10.Center service can be connected by network 41 by reading and writing rear end 10 The related data that multizone identifies is transferred to central server 42 by device 42.

Specifically, read-write rear end 10 includes back end communications processing unit, and acquisition front end 20 includes front end communication processing unit, Digital signal communication is realized between back end communications processing unit and front end communication processing unit, respectively read-write rear end 10 and acquisition The mutual information exchange in front end 20 is realized by digital signal and forwarded.The radiofrequency signal that acquisition front end 20 is received by antenna Realize that analog signal turns digital signal, is forwarded by front end communication processing unit after demodulation and filter and amplification by receives link It is preceding to carry out certain processing, it is needed due to carrying out digital signal communication between front end communication processing unit and back end communications processing unit Will be based on certain communication protocol, therefore also correspondingly to go to realize package processing, storage forwarding etc..Radio frequency write operation is then similarly With opposite process, front end communication processing unit receives the information to be written of back end communications processing unit transmission and channel is matched It puts, after the identifications such as power calibration control, transmitting link is controlled to realize that corresponding modulation and power are put by front end communication processing unit It is big to wait work, it will be described the specific implementation circuit of acquisition front end below.

Read-write rear end and acquisition front end can control acquisition front end real due to that can carry out information exchange, read-write rear end Existing radio frequency identification.Rear end is read and write for identifying control and safety certification, it is preferable that also to carry out communication tube with central server Reason, such as the related data of the identification of vehicle is uploaded to central server, it is uniformly stored and is analyzed by central server Processing, to meet the application demand of each side such as government, operator and user.And acquire what front end need to only be provided according to read-write rear end The transmitting-receiving of radiofrequency signal and demodulation modulation are implemented in identification control, and acquiring front end in this way, it is only necessary to arrange the relevant device of radio frequency processing Part, and the higher device of the costs such as security module, CPU can be integrated on read-write rear end, realizes separately positioned, and reads It writes the device in rear end and is accomplished that digital processing function mostly, be not easily susceptible to environmental disturbances, it will not be because of vehicle to be identified Distance generate great influence.Therefore having the advantage that if the damage of acquisition front end can also carry out being individually replaced should not Bring very big renewal cost, it is most important that, read-write rear end can control several to acquire front end simultaneously, save cost, The requirement of multizone identification is adapted to, especially has a certain distance between Classical correlation region.

It reads and writes between the back end communications processing unit of rear end and the front end communication processing unit of acquisition front end and connects and can adopt With wireless connection, such as the wireless communication protocols such as bluetooth, Zigbee, but preferably by wired connection, specific connection mode Star network or bus network may be used.As shown in Fig. 2, the back end communications processing unit of read-write rear end 10 includes several Gating interface can connect several acquisition front ends 20, with acquiring the front end communication processing unit of front end 20 into row information simultaneously Interaction.One acquisition front end 20 can be arranged in an identification region, identified so as to fulfill multizone.If read and write rear end 10 with Information exchange is carried out between dry acquisition front end, tdm communication may be used, is i.e. back end communications processing unit is thrown out more by hilted broadsword It closes and controls corresponding gating interface, timesharing is connected with specific gating interface.It can also be by the way of broadcast, to all choosings It connects mouth and sends identical interactive information, judge whether to respond interactive information by corresponding acquisition front end 20.

In a preferred embodiment, as shown in figure 3, being provided between read-write rear end 10 and several acquisition front ends 20 total Gauze network, reads and writes the back end communications processing unit of rear end 10 and the front end communication processing unit of all acquisition front ends 20 is all connected to In bus network, implementation information interacts between bus network between read-write rear end 10 and acquisition front end 20, in bus network Each equipment has that there are one specific addresses, is communicatively coupled by address, by the way that the mechanism sent out afterwards is first listened to avoid data Conflict so as to fulfill read-write rear end 10 and acquires the digital signal communication between front end 20.

Specifically, CAN bus may be used in bus network, and CAN bus is a kind of effectively support distributed AC servo system or real-time The serial communication network of control has the characteristics that data real-time communication is strong, the development cycle is short.As shown in figure 3, CAN bus packet Low level CAN buses and high level CAN bus are included, the access terminal between low level CAN bus and high level CAN bus With resistance 30.According to 11898 specifications of ISO, in order to enhance the reliability of CAN bus communication, two endpoints of CAN bus network Usually to add in terminal coupling resistance.The size of terminal coupling resistance is determined by the characteristic impedance of transmission cable, for example, multiple twin The characteristic impedance of line is 120 Ω.Therefore, two endpoints in CAN bus should be preferably integrated 120 Ω terminal couplings resistance 30, Correspondingly, the back end communications processing unit of read-write rear end 10 or the front end communication processing unit of acquisition front end 20 can be by double Twisted wire is connected in parallel on respectively in low level CAN bus and high level CAN bus.It should be noted that read-write rear end and acquisition front end Connection mode be not limited solely to CAN bus network, can also have other alternatives, such as Ethernet, Powerlink Deng.

As shown in figure 4, rear end structure schematic diagram is read and write in one embodiment of the utility model.It reads and writes rear end 10 and includes first Control module 11 and the security module 12 for connecting the first control module 11, the first control module 11 can be as read-write rear ends 10 Center controls, and security module 12 realizes two-way authentication and data encrypting and deciphering.Security module 12 is interacted with the first control module 11 It can determine whether security module 12 can carry out encryption and decryption to the information that the first control module 11 provides, due to being based on motor vehicle The radio frequency identification of electronic mark standard is to serve the identification of information of vehicles, high to security requirement, therefore to vehicle electric Information of vehicles stored in sub-mark etc. is at ciphertext state, and the identification information obtained by acquiring front end is also at ciphertext Using the close security algorithm of state in state to be decrypted, security module 12, the letter provided the first control module 11 can be realized Breath is encrypted or decrypts.Correspondingly, the first control module includes back end communications processing unit as described above realization to acquisition The information exchange of front end can send identification control to acquisition front end or obtain the information of acquisition front end feedback, identification control It can include the corresponding acquisition front end of notice and implement radio frequency read operation or radio frequency write operation or power calibration, switching frequency etc., Feedack can include acquisition front end work relevant parameter, can also include acquisition front end to vehicle electric sub-mark into Identification information of row Recognition feedback etc..First control module 11 interacts to obtain encryption and decryption information with security module 12.

First control module 11 can specifically include CPU111 and MCU112, MCU112 are used to carry out number with acquisition front end It signal communication and is interacted with security module 12, for example safety is supplied to by the encryption identification information that front end feedback returns is acquired Module 12 is decrypted by security module 12, and the plaintext after decryption can be transferred directly to CPU111.CPU111 is used for according to peace The solution confidential information that full module 12 provides carries out data processing or sends identification control phase to corresponding acquisition front end by MCU112 The configuration information of pass, such as power calibration, switching frequency etc..Also or read-write rear end is needed by acquiring front end to specific motor-driven When vehicle electronic mark carries out radio frequency write operation, CPU111 is encrypted by sending related information to be written to security module 12 and carried MCU112 is supplied, then corresponding acquisition front end is controlled to carry out radio frequency write operation by MCU112.MCU112 can be equivalent to read-write The back end communications processing unit of rear end 11 is mainly responsible for the information exchange with acquisition front end.In addition it can coordinate with CPU111 It is interacted with security module 12, specifically can security module 12 be supplied to by MCU112 with ciphertext, then decrypted to CPU111, Security module 12 is supplied to by CPU111 in plain text, is then encrypted to MCU112, the running parameter of security module 12 is straight by CPU111 It connects and is supplied to security module 12.The most important functions of CPU111 are the processing center of data, for being applied to Roadside Parking, After the vehicle identification information on all parking stalls is fed back to CPU111, CPU 111 show which parking stall is occupied by analysis With parking vehicle identity on parking stall, the vehicle of specific identity occupies the time on parking stall etc., can also further pass through CPU111 realizes the statistics of charging directly in rear end 10 is read and write, it is highly preferred that as shown in Figure 1, can also by cable or 4G modules connect network 41, and then carry out telecommunication management with central server 42, transmit relevant data to central server 42, Here central server 42 can be the vehicle management system server of a City-level.CPU111 preferably also supports suspension Function is resumed, related data when something goes wrong, is stored temporarily in reading by communication network between read-write rear end and central server It writes in rear end, waits network recoveries later automatically by temporary data retransmission to central server.

As shown in figure 5, front-end architecture schematic diagram is acquired in one embodiment of the utility model.Acquisition front end 20 is mainly penetrated The radio frequency part function of frequency identification, the main processing realized to analog signal.It acquires front end 20 and includes the second control module （MCU201）And mutually isolated transmitting link and receives link, antenna 24, antenna 24 are used for transceiving radio frequency signal, similar application In the application of Roadside Parking, since the identification region on single parking stall is usually little, the gain requirement of antenna 24 can not also Height, such as 6dBi gain antennas can be met the requirements, and antenna 24 can be with peripheral hardware in more embodiments.Antenna can be with It is connect respectively with transmitting link, receives link by coupled apparatus, the second control module carries out digital signal with read-write rear end and leads to Letter is modulated with controlling and receiving link and emitting the transmitting-receiving of link and demodulate.

In a particular embodiment, coupled apparatus be directional coupler 25, directional coupler 25 have first end 251, The characteristics of second end 252, third end 253, the 4th end 254, directional coupler 25, is, when the first end of directional coupler 25 251 when being input terminal, and second end 252 is straight-through end, and third end 253 is coupled end, and the 4th end 254 is isolation end, when orientation coupling When the second end 252 of clutch 25 is input terminal, first end 251 is straight-through end, and third end 253 is isolation end, and the 4th end 254 is coupling End is closed, when the third end 253 of directional coupler 25 is input terminal, the 4th end 254 is straight-through end, and first end 251 is coupled end, Second end 252 is isolation end, therefore can realize good transceiver insulation effect.The first end 251 of directional coupler 25 is successively To receive the transmitting signal that transmitting link generates, MCU201 is read by receiving by connection power amplifier unit 212, modulator 211, MCU201 That writes rear end offer identifies that control provides corresponding signal to be modulated to transmitting link, interior in MCU201 here to turn equipped with digital-to-analogue Block is changed the mold, corresponding analog signal is generated by digital control, for the MCU of no D/A converter module, needs in modulator String is equipped with digital analog converter between MCU, emits the modulator 211 of link, power amplifier unit 212 is realized and signal modulation is arrived respectively Ultra-high frequency band（Such as 920-925MHz frequency ranges）And processing is amplified to the power of signal.The second end of directional coupler 25 252 connection antennas 24, in the case of multiple antennas, are preferably additionally provided with a day line options between second end 252 and antenna 24 Network.When by transmitting link treated transmitting signal enter the first end 251 of directional coupler 25 after, will be from second end 252 outputs are transferred to antenna 24 and radiate.

4th end 254 of directional coupler 25 be sequentially connected modulator 221, filter amplification circuit 222, phase inverter 223, For MCU201 to be supplied to MCU201 by signal is received by receives link, the radiofrequency signal that antenna 24 receives enters directional couple After the second end 252 of device 25, according to the coupled characteristic of directional coupler, it can be exported from the 4th end 254, the solution in receives link Device 221, filter amplification circuit 222, phase inverter 223 is adjusted to realize the radiofrequency signal of reception to be demodulated and filtered, is amplified etc. Reason, wherein 223 role of phase inverter be analog-to-digital conversion effect, have the characteristics that it is cheap, in more embodiments, In order to ensure the accuracy of analog-to-digital conversion, phase inverter 223 can be substituted for analog-digital converter, MCU201 receives corresponding knowledge After carrying out the operations such as package to it after other information, it is transmitted to read-write back-end realization and is further processed.In preferred embodiment In, motor vehicle electronic identification standard is gone back using passive techniques, therefore when receiving motor vehicle electronic mark feedack Constantly carrier wave is sent to vehicle electric sub-mark to provide energy, therefore transmit-receive cofrequency leads to the carrier leak docking collection of letters number Interference, therefore the third end 253 of directional coupler 25 can also connected vector modulator 23, vector modulator 23 connects MCU201 is controlled by MCU201, is generated one and is offseted signal with the carrier wave of width reverse phase with the carrier signal leaked, specifically MCU201 can receive the output of the situation adjustment vector modulator 23 of leakage carrier wave according to receives link in initialization, similarly MCU201 is also to be realized by built-in D/A converter module to the output of vector modulator 23, and the carrier wave of generation offsets signal and leads to The third end 253 for crossing directional coupler 25 enters, at the 4th end 254 of directional coupler 25 and the carrier signal realization pair of leakage Disappear.MCU201 control PLL (phaselocked loop) 202 provide corresponding local oscillation signal, such as receive the switching frequency sent read-write rear end The information of rate will control the local oscillation signal of PLL202 output corresponding frequencies, specifically, adopt time-sharing operation is multiple as needed When collecting front end, the work of entire acquisition front end can be controlled by controlling PLL202 outputs.

As described above, the radio-frequency identification reader/writer based on multizone identification can be that a read-write rear end connection control is several A acquisition front end realization multizone identifies, since read-write rear end and acquisition front end do not use simple direct-connected mode, It can support longer-distance layout, specifically, several acquisition front ends are arranged in corresponding identification region, after read-write Control is identified in end unification, and in the case of can generate interference between adjacent acquisition front end, read-write rear end can also be to corresponding Acquisition front end carry out Time-sharing control, ensure not work at the same time between the acquisition front end interfered with each other.As shown in fig. 6, this practicality Radio-frequency identification reader/writer is applied to Roadside Parking schematic diagram in a novel embodiment.Roadside Parking management system includes as above institute The read-write rear end and acquisition front end stated, Roadside Parking is to delineate to have several parking stalls in the both sides of road, on each parking stall Front side be provided with column, an acquisition can be installed preferably on the curb of the right front on parking stall, on each column Front end 20, the signal transmitting and receiving direction of acquisition front end 20 face vehicle in parking stall, that is, face installed on vehicle it is motor-driven Vehicle electronic mark.The corresponding acquisition front end in several parking stalls can be controlled by connection by reading and writing rear end, in the present embodiment, It can be by sunkening cord along inside column and underground and being connected to same read-write rear end, read-write rear end passes through the mould that communicates accordingly again Block connects network.Read-write rear end determines the identity for whether having vehicle and vehicle on parking stall by the acquisition front end 20 on column, counts At the beginning of calculating vehicle parking, corresponding vehicle has been judged when the identity for not reading corresponding vehicle in predetermined time period Through sailing out of parking stall, so as to calculate the Roadside Parking time of vehicle.

In a preferred embodiment, in order to adapt to the requirement of different automobile types on parking stall, than if any A grades of vehicles, B grades of vehicles or Person's SUV vehicles etc., their height is different, in order to obtain better radio frequency identification effect, is set in holding before acquisition a variety of The antenna of angle, acquisition front end 20 include at least the first antenna for adapting to the first vehicle level identification and adapt to the second vehicle height Second antenna of identification by setting fixed angle, ensures first antenna and the difference in height of the second antenna identification, first antenna And second antenna connect gateable day line options network to realize poll, the effect of poll is to ensure first antenna and second day It does not interfere with each other, day line options real-time performance timesharing can specifically be gated by acquiring the MCU in front end corresponding between line Antenna.

In conclusion the utility model by radio-frequency identification reader/writer by being divided into read-write rear end and acquisition front end two Point, it realizes basic radio frequency processing by acquiring front end, device of high cost is integrated in read-write rear end and realizes multiplexing, read-write Digital signal communication is realized by communications processor element between rear end and acquisition front end.The utility model can reduce multizone knowledge The cost that radio-frequency identification reader/writer is laid out under other scene, ensures the effect of radio frequency identification, has been improved particularly the applications such as Roadside Parking Efficiency.

It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say For bright book as an entirety, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can With the other embodiment of understanding.

The a series of tool that the feasibility embodiment only for the utility model is described in detail of those listed above Body illustrates, they are all to be made without departing from the utility model skill spirit not to limit the scope of protection of the utility model Equivalent implementations or change should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of radio-frequency identification reader/writer based on multizone identification, which is characterized in that including read-write rear end and at least one adopt Collect front end, the read-write rear end includes back end communications processing unit, and the acquisition front end includes front end communication processing unit, described Back end communications processing unit is connect with the front end communication processing unit realizes digital signal forwarding to ensure the read-write rear end The acquisition front end is controlled to realize radio frequency identification；

The identification that the read-write rear end provides for identification control and safety certification, the acquisition front end according to the read-write rear end The transmitting-receiving of radiofrequency signal and demodulation modulation are implemented in control.

2. the radio-frequency identification reader/writer according to claim 1 based on multizone identification, which is characterized in that after the read-write The back end communications processing unit at end includes several gating interfaces, and it is corresponding that the support of several gating interfaces connects several simultaneously Front end is acquired, the read-write rear end realizes that multizone identifies by several acquisition front ends of connection.

3. the radio-frequency identification reader/writer according to claim 1 based on multizone identification, which is characterized in that after the read-write Bus network, the back end communications processing unit of the read-write rear end, the acquisition are provided between end and several acquisition front ends The front end communication processing unit of front end connects the bus network simultaneously, by the bus network realize it is described read-write rear end with Digital signal communication between the acquisition front end.

4. the radio-frequency identification reader/writer according to claim 3 based on multizone identification, which is characterized in that the bus network Network is CAN bus, and the CAN bus includes low level CAN bus and high level CAN bus, the low level CAN bus and institute State access terminal build-out resistor between high level CAN bus.

5. the radio-frequency identification reader/writer according to claim 1 based on multizone identification, which is characterized in that after the read-write End includes the security module of the first control module and connection first control module, and first control module is adopted to corresponding Collection front end is identified control or obtains the information of the acquisition front end feedback, first control module and the security module It interacts to obtain encryption and decryption information.

6. the radio-frequency identification reader/writer according to claim 5 based on multizone identification, which is characterized in that first control Molding block includes MCU and CPU, MCU are used to carry out digital signal communication with acquisition front end and be interacted with the security module, CPU is used for the solution confidential information provided according to security module and carries out data processing or send to corresponding acquisition front end by MCU to match Confidence ceases and carries out telecommunication management with central server by the network of connection.

7. the radio-frequency identification reader/writer according to claim 1 based on multizone identification, which is characterized in that before the acquisition End includes the second control module and mutually isolated transmitting link and receives link, the antenna for transceiving radio frequency signal pass through coupling Clutch part is connect respectively with transmitting link, receives link, and second control module carries out digital signal with the read-write rear end Communication is modulated with controlling the receives link and emitting the transmitting-receiving of link and demodulate.

8. the radio-frequency identification reader/writer according to claim 7 based on multizone identification, which is characterized in that before the acquisition End specifically includes directional coupler, and the first end of the directional coupler is sequentially connected power amplifier unit, modulator, the second control mould Block to receive the transmitting signal that transmitting link generates, the second end connection antenna of the directional coupler with transceiving radio frequency signal, The vector modulator that the third end of the directional coupler is controlled by second control module is connected offsets letter to provide carrier wave Number, the 4th end of the directional coupler is sequentially connected modulator, filter amplification circuit, phase inverter, the second control module with logical It crosses receives link and reception signal is supplied to second control module, second control module controls phaselocked loop to the tune Device processed, demodulator provide local oscillation signal.

9. a kind of Roadside Parking manages system, which is characterized in that reads and writes rear end including claim 1-8 any one of them and adopts Collect front end, column is provided on front side of each Roadside Parking position, the acquisition front end is installed with face vehicle on the column The vehicle electric sub-mark of upper installation.

10. Roadside Parking according to claim 9 manages system, which is characterized in that the acquisition front end includes at least suitable It answers the first antenna of the first vehicle level identification and adapts to the second antenna of the second vehicle level identification, the first antenna and the Two antennas connect gateable day line options network to realize poll.