CN104036224A - Multi-mode mobile identity authentication system and method based on RFID - Google Patents
Multi-mode mobile identity authentication system and method based on RFID Download PDFInfo
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Abstract
The invention provides a multi-mode mobile identity authentication system and method based on the RFID. The read-write functions of a low-frequency non-contact intelligent card and a high-frequency non-contact intelligent card are integrated in one device and are deployed through a main controller, and therefore the read-right low-frequency non-contact intelligent card and the read-right high-frequency non-contact intelligent card can be read and written on one device, and the system and the method are suitable for application occasions where both the low-frequency non-contact intelligent card and the high-frequency non-contact intelligent card need to be read and written and have the advantages of being low in application cost and convenient to use. Meanwhile, due to the combined design with a reset module, a reset frequency divider, a counter, a second counter, a decoding state module, a deciphering module and a decoding signal sampling module, the counting length of the counter and counting length of the second counter can be set by selecting different types of frequency dividing signal output of the frequency counter, decoding is achieved for communication code rates with different widths, the non-feedback forward design is used for a whole decoder, and data decoding at different communication speeds can be supported.
Description
Technical field
The present invention relates to a kind of contactless identity authorization system, relate in particular to a kind of multi-mode based on RFID and move identity authorization system and method.
Background technology
RFID (radio-frequency (RF) identification: radio frequency identification) be a kind of contactless automatic identification technology, it is automatically identified destination object and is obtained related data by radiofrequency signal, identification work need not manual intervention, wireless version as bar code, RFID technology has the not available waterproof of bar code, antimagnetic, high temperature resistant, long service life, read that distance is large, on label data can encrypt, store that data capacity is larger, the storage information change advantage such as freely, its application will bring revolutionary variation to industries such as retail, logistics.
The most basic rfid system is comprised of three parts: label (Tag), by coupling element and chip, formed, and each label has unique electronic code, is attached to and on object, identifies destination object; Reader (Reader), reads the equipment of (sometimes can also write) label information, can be designed to hand-held or fixed; Antenna (Antenna) transmits radiofrequency signal between label and reader.
The electronic data of generally preserving agreement form in electronic tag, in actual applications, electronic tag is attached to the surface of object to be identified.Reader can contactlessly read and identify the electronic data of preserving in electronic tag, thereby reaches the object of automatic identification body.Conventionally reader is connected with computer, and the label information reading is sent on computer and is for further processing.
The principle of work of RFID is: reader sends out the radiofrequency signal of certain frequency by antenna, thereby when label enters magnetic field, produce induction current and obtain energy, send out the information such as self coding be read device read and decode after deliver to host computer and carry out relevant processing.
The frequency of using when reader sends is conventionally called as the frequency of operation of rfid system, is substantially divided into 3 scopes: low frequency (30kHz-300kHz), high frequency (3MHz-30MHz) and ultrahigh frequency (300MHz-3GHz).Common frequency of operation has low frequency 125kHz, 134.2kHz and high frequency 13.56MHz etc.
By computing machine and computer network, can realize management functions such as the collection of object identification information, processing and teletransmissions.For most of rfid systems, will adopt a fixing frequency, and have a set of standard agreement to match with it.
Development along with RFID technology, contactless identity authorization system is suggested, it is the dual factors identity authorization system based on Technology of Radio Frequency Card, can solve by password and reveal the security of system problem causing, and the safety certification while having realized managerial personnel and operator's registering service system is controlled.
But the existing identification authentication system based on RFID can only be read and write the identity smart-card of a kind of pattern or frequency range, can not on an identification authentication system, read and write two or more identity smart-cards, if in the occasion that need to read while write the identity smart-card of two kinds of patterns or frequency range, two kinds of authentication read-write equipments just need to be installed, because needs increase a read-write equipment, therefore original radio-frequency card application terminal device interior space layout needs to redesign, and increased the volume of device, the profile of modifier even, cause the radio-frequency card application terminal equipment cannot normal mounting and use in original system, in addition, because radio-frequency card application terminal equipment is installed two different read-write equipments, cause same radio-frequency card application terminal device (as POS machine, gate inhibition etc.) to have two different regions of swiping the card, the difference that user need to press close to terminal according to the difference of hand-held radio-frequency card when swiping the card the like this region of swiping the card, cause user's puzzlement, cause using inconvenience.
On the other hand, for different smart cards, its traffic rate of supporting is also not quite similar, therefore the read-write equipment that wants same identity authentication is supported the smart card of various traffic rates, also a plurality of read-write equipments with different demodulation rate must be installed, cause the rising of cost and volume, use inconvenience.
Summary of the invention
The object of the invention is to be achieved through the following technical solutions.
For above-mentioned defect, according to an embodiment of the invention, proposed a kind of multi-mode based on RFID and moved identity authorization system, described system at least comprises control module, low-frequency range contact type intelligent card processing unit, high band contact type intelligent card processing unit and many rate demodulation unit; Wherein, described control module comprises master controller and signal converter; Described low-frequency range contact type intelligent card processing unit comprises antenna and the antenna-matching circuit that low-frequency range transmitting-receiving process chip, frequency range are low-frequency range; Described high band contact type intelligent card processing unit comprises safe main control chip, high band radio frequency chip and high band aerial array.
According to an embodiment of the invention, described low-frequency range is 13.56Mhz, and described high band is 2.4GHz.
According to an embodiment of the invention, described master controller is provided with the first data transmit-receive interface, the second data transmit-receive interface and UART communication interface; Described signal converter is provided with RS communication interface and TTL transmission interface, and its TTL transmission interface connects the first data transmit-receive interface of master controller;
According to an embodiment of the invention, described low-frequency range transmitting-receiving process chip is provided with antennal interface and data transmit-receive interface, and its data transmit-receive interface connects the second data transmit-receive interface of master controller; Described antenna is connected to the antennal interface of low-frequency range transmitting-receiving process chip through antenna-matching circuit;
According to an embodiment of the invention, described safe main control chip is provided with UART communication interface and data transmit-receive interface, and its UART communication interface connects the UART communication interface of master controller; Described high band radio frequency chip is provided with radio-frequency receiving-transmitting interface and data transmit-receive interface, and its radio-frequency receiving-transmitting interface connects high band aerial array, and its data transmit-receive interface connects the data transmit-receive interface of safe main control chip; In described safe main control chip, be built-in with for controlling the distance control module of smart card reading/writing distance and the authentication module authenticating for smart card identity.
According to an embodiment of the invention, described many rate demodulation unit comprises reseting module, is configured to produce reset signal according to systematic reset signal and radio frequency input restituted signal;
The frequency divider that band resets and controls, be configured to radio frequency clock signal to carry out frequency division, by radio frequency clock signal negative edge, triggered, according to code rate selection signal output frequency division signal, and the two divided-frequency signal of 1/2 radio frequency clock signal frequency, two output signals are by reseting signal reset;
Counter, is configured to fractional frequency signal to count, by fractional frequency signal rising edge, triggered, and output the first count signal, and by reseting signal reset;
The second counter, is configured to fractional frequency signal to carry out mould X counting, by fractional frequency signal rising edge, triggered, and output the second count signal, and by reseting signal reset;
Decoded state module, is configured to trigger according to the negative edge of two divided-frequency signal, produces and receives indicator signal;
Decoding module, is configured to according to systematic reset signal, receives indicator signal, fractional frequency signal, the first count signal and the second count signal output unit encoded clock signal;
Decoded signal sampling module, this module is configured to according to systematic reset signal, reset signal and unit encoding clock signal, the decoded output signal of output non return-to-zero code.
According to an embodiment of the invention, described multi-mode moves identity authorization system and also comprises radiofrequency signal isolated location, in order to the radiofrequency signal of physical isolation different frequency range.
According to another implementation of the invention, the above-mentioned multi-mode based on RFID moves identity authorization system the authentication of contact type intelligent card is comprised: read step and write step, wherein
Read step comprises:
When low-frequency range antenna induction arrives low-frequency range contact type intelligent card, by antenna-matching circuit, send the information sensing to low-frequency range transmitting-receiving process chip, low-frequency range transmitting-receiving process chip sends master controller to after the induction information of receiving is processed;
When high band aerial array senses high band contact type intelligent card, by high band radio frequency chip, send the information sensing to safe main control chip, safe main control chip carries out authentication by its built-in authentication module to high band contact type intelligent card, if the authentication of high band contact type intelligent card is passed through, from high band contact type intelligent card, after reading out data, send master controller to;
Master controller transfers to signal converter after receiving the data that low-frequency range transmitting-receiving process chip or safe main control chip send here, and the data that signal converter is sent master controller here send to host computer from Transistor-Transistor Logic level is converted to RS level;
Write step comprises:
Host computer is to signal converter transmit operation instruction and data, and signal converter is sent into master controller by the instruction and data receiving from RS level conversion is Transistor-Transistor Logic level;
The instruction and data that master controller is sent here signal converter is analyzed, and to low-frequency range, receives and dispatches process chip or safe main control chip sending controling instruction and data according to analysis result;
When low-frequency range transmitting-receiving process chip, receive after the steering order and data that master controller is sent, by antenna-matching circuit, antenna, low-frequency range contact type intelligent card is carried out to write operation;
When safe main control chip, receive after the steering order and data that master controller is sent, by high band radio frequency chip, high band aerial array, high band contact type intelligent card is carried out to write operation.
Multi-mode based on RFID provided by the invention moves identity authorization system and method, integrated low-frequency range contact type intelligent card and high band contact type intelligent card read-write capability in a device, and allocate by master controller, therefore on a device, can realize read-write low-frequency range contact type intelligent card and high band contact type intelligent card, be applicable to both need to read and write low-frequency range contact type intelligent card, need again to read and write the application scenario of low-frequency range contact type intelligent card, there is application cost feature low and easy to use; The present invention is simultaneously by the composite design of the frequency divider with reseting module, reset, counter, the second counter, decoded state module, decoding module and decoded signal sampling module, can be by selecting the different fractional frequency signal of frequency counter to export, arrange the counting step of counter and the second counter, communication code check for different in width is decoded, whole demoder is used the forward direction design without feedback, can support the data decode of different communication speed.
Accompanying drawing explanation
By reading below detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing is only for the object of preferred implementation is shown, and do not think limitation of the present invention.And in whole accompanying drawing, by identical reference symbol, represent identical parts.In the accompanying drawings:
Accompanying drawing 1 shows according to the multi-mode based on RFID of an embodiment of the invention and moves identity authorization system structured flowchart;
Accompanying drawing 2 shows the many rate demodulation cellular construction schematic diagram according to an embodiment of the invention;
Embodiment
Exemplary embodiment of the present disclosure is described below with reference to accompanying drawings in more detail.Although shown exemplary embodiment of the present disclosure in accompanying drawing, yet should be appreciated that and can realize the disclosure and the embodiment that should do not set forth limits here with various forms.On the contrary, it is in order more thoroughly to understand the disclosure that these embodiment are provided, and can by the scope of the present disclosure complete convey to those skilled in the art.
For overcoming above-mentioned defect, the present invention proposes a kind of multi-mode based on RFID and moves identity authorization system, as shown in Figure 1, described system at least comprises control module, low-frequency range contact type intelligent card processing unit, high band contact type intelligent card processing unit and many rate demodulation unit;
According to an embodiment of the invention, described low-frequency range is 13.56Mhz, and described high band is 2.4GHz.
Described control module comprises master controller and signal converter; Described master controller is provided with the first data transmit-receive interface, the second data transmit-receive interface and UART communication interface; Described signal converter is provided with RS communication interface and TTL transmission interface, and its TTL transmission interface connects the first data transmit-receive interface of master controller;
Described low-frequency range contact type intelligent card processing unit comprises antenna and the antenna-matching circuit that low-frequency range transmitting-receiving process chip, frequency range are low-frequency range; Described low-frequency range transmitting-receiving process chip is provided with antennal interface and data transmit-receive interface, and its data transmit-receive interface connects the second data transmit-receive interface of master controller; Described antenna is connected to the antennal interface of low-frequency range transmitting-receiving process chip through antenna-matching circuit;
Described high band contact type intelligent card processing unit comprises safe main control chip, high band radio frequency chip and high band aerial array; Described safe main control chip is provided with UART communication interface and data transmit-receive interface, and its UART communication interface connects the UART communication interface of master controller; Described high band radio frequency chip is provided with radio-frequency receiving-transmitting interface and data transmit-receive interface, and its radio-frequency receiving-transmitting interface connects high band aerial array, and its data transmit-receive interface connects the data transmit-receive interface of safe main control chip; In described safe main control chip, be built-in with for controlling the distance control module of smart card reading/writing distance and the authentication module authenticating for smart card identity.
As shown in Figure 2, described many rate demodulation unit comprises reseting module, is configured to produce reset signal according to systematic reset signal and radio frequency input restituted signal;
The frequency divider that band resets and controls, be configured to radio frequency clock signal to carry out frequency division, by radio frequency clock signal negative edge, triggered, according to code rate selection signal output frequency division signal, and the two divided-frequency signal of 1/2 radio frequency clock signal frequency, two output signals are by reseting signal reset;
Counter, is configured to fractional frequency signal to count, by fractional frequency signal rising edge, triggered, and output the first count signal, and by reseting signal reset;
The second counter, is configured to fractional frequency signal to carry out mould X counting, by fractional frequency signal rising edge, triggered, and output the second count signal, and by reseting signal reset;
Decoded state module, is configured to trigger according to the negative edge of two divided-frequency signal, produces and receives indicator signal;
Decoding module, is configured to according to systematic reset signal, receives indicator signal, fractional frequency signal, the first count signal and the second count signal output unit encoded clock signal;
Decoded signal sampling module, this module is configured to according to systematic reset signal, reset signal and unit encoding clock signal, the decoded output signal of output non return-to-zero code.
By the cooperation of above-mentioned a plurality of modules, can be by selecting the different fractional frequency signal of frequency counter to export, arrange the counting step of counter and the second counter, communication code check for different in width is decoded, whole demoder is used the forward direction design without feedback, can support the data decode of different communication speed.
According to an embodiment of the invention, described multi-mode moves identity authorization system and also comprises radiofrequency signal isolated location, in order to the radiofrequency signal of physical isolation different frequency range, to avoid interference.
The multi-mode based on RFID providing according to above-mentioned embodiment moves identity authorization system, and its read step to contact type intelligent card is as follows:
When low-frequency range antenna induction arrives low-frequency range contact type intelligent card, by antenna-matching circuit, send the information sensing to low-frequency range transmitting-receiving process chip, low-frequency range transmitting-receiving process chip sends master controller to after the induction information of receiving is processed;
When high band aerial array senses high band contact type intelligent card, by high band radio frequency chip, send the information sensing to safe main control chip, safe main control chip carries out authentication by its built-in authentication module to high band contact type intelligent card, if the authentication of high band contact type intelligent card is passed through, from high band contact type intelligent card, after reading out data, send master controller to;
Master controller transfers to signal converter after receiving the data that low-frequency range transmitting-receiving process chip or safe main control chip send here, and the data that signal converter is sent master controller here send to host computer from Transistor-Transistor Logic level is converted to RS level;
Wherein, the write step of contact type intelligent card is as follows:
Host computer is to signal converter transmit operation instruction and data, and signal converter is sent into master controller by the instruction and data receiving from RS level conversion is Transistor-Transistor Logic level;
The instruction and data that master controller is sent here signal converter is analyzed, and to low-frequency range, receives and dispatches process chip or safe main control chip sending controling instruction and data according to analysis result;
When low-frequency range transmitting-receiving process chip, receive after the steering order and data that master controller is sent, by antenna-matching circuit, antenna, low-frequency range contact type intelligent card is carried out to write operation;
When safe main control chip, receive after the steering order and data that master controller is sent, by high band radio frequency chip, high band aerial array, high band contact type intelligent card is carried out to write operation.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (8)
1. the multi-mode based on RFID moves an identity authorization system, and described system at least comprises control module, low-frequency range contact type intelligent card processing unit, high band contact type intelligent card processing unit and many rate demodulation unit; Wherein, described control module comprises master controller and signal converter; Described low-frequency range contact type intelligent card processing unit comprises low-frequency range transmitting-receiving process chip, low-frequency range antenna and antenna-matching circuit; Described high band contact type intelligent card processing unit comprises safe main control chip, high band radio frequency chip and high band aerial array.
2. the system as claimed in claim 1, described low-frequency range is 13.56Mhz, described high band is 2.4GHz.
3. the system as claimed in claim 1, described master controller is provided with the first data transmit-receive interface, the second data transmit-receive interface and UART communication interface; Described signal converter is provided with RS communication interface and TTL transmission interface, and its TTL transmission interface connects the first data transmit-receive interface of master controller.
4. the system as claimed in claim 1, described low-frequency range transmitting-receiving process chip is provided with antennal interface and data transmit-receive interface, and its data transmit-receive interface connects the second data transmit-receive interface of master controller; Described antenna is connected to the antennal interface of low-frequency range transmitting-receiving process chip through antenna-matching circuit.
5. the system as claimed in claim 1, described safe main control chip is provided with UART communication interface and data transmit-receive interface, and its UART communication interface connects the UART communication interface of master controller; Described high band radio frequency chip is provided with radio-frequency receiving-transmitting interface and data transmit-receive interface, and its radio-frequency receiving-transmitting interface connects high band aerial array, and its data transmit-receive interface connects the data transmit-receive interface of safe main control chip; In described safe main control chip, be built-in with for controlling the distance control module of smart card reading/writing distance and the authentication module authenticating for smart card identity.
6. the system as claimed in claim 1, described many rate demodulation unit comprises reseting module, is configured to produce reset signal according to systematic reset signal and radio frequency input restituted signal;
The frequency divider that band resets and controls, be configured to radio frequency clock signal to carry out frequency division, by radio frequency clock signal negative edge, triggered, according to code rate selection signal output frequency division signal, and the two divided-frequency signal of 1/2 radio frequency clock signal frequency, two output signals are by reseting signal reset;
Counter, is configured to fractional frequency signal to count, by fractional frequency signal rising edge, triggered, and output the first count signal, and by reseting signal reset;
The second counter, is configured to fractional frequency signal to carry out mould X counting, by fractional frequency signal rising edge, triggered, and output the second count signal, and by reseting signal reset;
Decoded state module, is configured to trigger according to the negative edge of two divided-frequency signal, produces and receives indicator signal;
Decoding module, is configured to according to systematic reset signal, receives indicator signal, fractional frequency signal, the first count signal and the second count signal output unit encoded clock signal;
Decoded signal sampling module, this module is configured to according to systematic reset signal, reset signal and unit encoding clock signal, the decoded output signal of output non return-to-zero code.
7. the system as claimed in claim 1, described multi-mode moves identity authorization system and also comprises radiofrequency signal isolated location, in order to the radiofrequency signal of physical isolation different frequency range.
8. as the multi-mode based on RFID of claim 1-7 as described in one of them moves identity authorization system, the authentication of contact type intelligent card is comprised: read step and write step, wherein
Read step comprises:
When low-frequency range antenna induction arrives low-frequency range contact type intelligent card, by antenna-matching circuit, send the information sensing to low-frequency range transmitting-receiving process chip, low-frequency range transmitting-receiving process chip sends master controller to after the induction information of receiving is processed;
When high band aerial array senses high band contact type intelligent card, by high band radio frequency chip, send the information sensing to safe main control chip, safe main control chip carries out authentication by its built-in authentication module to high band contact type intelligent card, if the authentication of high band contact type intelligent card is passed through, from high band contact type intelligent card, after reading out data, send master controller to;
Master controller transfers to signal converter after receiving the data that low-frequency range transmitting-receiving process chip or safe main control chip send here, and the data that signal converter is sent master controller here send to host computer from Transistor-Transistor Logic level is converted to RS level;
Write step comprises:
Host computer is to signal converter transmit operation instruction and data, and signal converter is sent into master controller by the instruction and data receiving from RS level conversion is Transistor-Transistor Logic level;
The instruction and data that master controller is sent here signal converter is analyzed, and to low-frequency range, receives and dispatches process chip or safe main control chip sending controling instruction and data according to analysis result;
When low-frequency range transmitting-receiving process chip, receive after the steering order and data that master controller is sent, by antenna-matching circuit, antenna, low-frequency range contact type intelligent card is carried out to write operation;
When safe main control chip, receive after the steering order and data that master controller is sent, by high band radio frequency chip, high band aerial array, high band contact type intelligent card is carried out to write operation.
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| CN201410300567.0A CN104036224A (en) | 2014-06-27 | 2014-06-27 | Multi-mode mobile identity authentication system and method based on RFID |
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