CN101923631B - CPLD-based low-frequency ID card real-time simulator - Google Patents
CPLD-based low-frequency ID card real-time simulator Download PDFInfo
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- CN101923631B CN101923631B CN 200910117473 CN200910117473A CN101923631B CN 101923631 B CN101923631 B CN 101923631B CN 200910117473 CN200910117473 CN 200910117473 CN 200910117473 A CN200910117473 A CN 200910117473A CN 101923631 B CN101923631 B CN 101923631B
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Abstract
The invention provides a low-frequency ID card real-time simulator based on a CPLD control chip, wherein a CPLD 1-2 monitors the electromagnetic field energy variation in the space through a record connected to an RS2321-1, and collects an ID card number; a CPLD1-2 drives a bluetooth1-4 and uploads the ID card number to any handset device for storage, the handset device being provided with upper computer softwares. At the same time the any handset device with the upper computer softwares can send the ID card number to the CPLD1-2 through the Bluetooth 1-4, and the CPLD1-2 drives an inductive coupling responder 1-3 to simulate the behavior of an ID card.
Description
Technical field
The invention belongs to low-frequency ID card real-time simulation analogue means.
Background technology
At present, the THRC12 untouched ID card mainly can be applicable to identification and addressing control.Yet its level security can just can be known the ID card number by the variation of judging the energy of electromagnetic field in the space, simulates the behavior of ID card after the Principle of Communication of having understood between card reader and the ID card.But, the single-chip microcomputer scheme is generally adopted in its simulation, cause the not strong easily skip of real-time to be misread, cause information imperfect, can't obtain accurate information, the accuracy of impact simulation.
Summary of the invention
The purpose of this invention is to provide a kind of low-frequency ID card real time simulator based on CPLD.
The present invention is a kind of low-frequency ID card real-time simulation simulator based on the CPLD control chip, by CPLD 1-2 ID card card number is recorded out in the variation of the energy of electromagnetic field in the space, its carrier frequency is 125KHz, its spatial dimension be card reading antennas just around 0～100cm, CPLD 1-2 uploads ID card card number by RS232 1-1 record and by bluetooth 1-4, selects any handset apparatus storage that installs upper computer software and discharge ID card card number to send the data to the behavior of inductive coupling transponder 1-3 Simulation with I D card by CPLD 1-2 again to CPLD 1-2.
Low-frequency ID card real-time simulation simulator based on the CPLD chip of the present invention adopt CPLD to carry out data to have dealt with the reading speed that the available data treatment technology exists slow, the problem of reading out data poor accuracy.
Process whole system and adopted devices at full hardware to realize owing to adopting CPLD to carry out data, thus overcome processor speed slow, reset slow, unreliable, the weak point such as program is unstable.
Description of drawings
Fig. 1 is CPLD low-frequency ID card real time simulator structured flowchart, and Fig. 2 is the CPLD control and treatment circuit, and Fig. 3 is transponder circuit, and Fig. 4 is software function module division figure.
Embodiment
CPLD low-frequency ID card real time simulator structured flowchart as shown in Figure 1, by CPLD 1-2 ID card card number is recorded out in the variation of the energy of electromagnetic field in the space, its carrier frequency is 125KHz, its spatial dimension be card reading antennas just around 0～100cm, CPLD 1-2 uploads ID card card number by the RS2321-1 record and by bluetooth 1-4, selects any handset apparatus storage that installs upper computer software and discharge ID card card number to send the data to the behavior of inductive coupling transponder 1-3 Simulation with I D card by CPLD 1-2 again to CPLD 1-2.
The ID card sends the electromagnetic wave of 125KHz towards periphery, the longest 0～100cm that reaches of the operating distance in card reading antennas the place ahead; The ID card will obtain electric energy and activate the internal control chip after entering the energy field of card reader, and control chip repeats to send to card reader with 64 the ID number form with Manchester code.Card reader is decoded to the binary sequence that receives and is obtained ID card card number, sends CPLD to by serial ports again.
There is a duplexing serial ports bluetooth module ID card simulator inside, and it can the descending Serial Port Information of Shang Hang; CPLD sends to hand-held set with the ID card card number of collecting by bluetooth serial ports; Hand-held set also can send to CPLD by the ID card card number that bluetooth will be simulated, and the low-frequency ID card real time simulator of CPLD will be simulated this low frequency card behavior.
The inner transponder that also has an inductive coupling of CPLD ID card simulator; The aerial coil of reader produces the alternating magnetic field of 125KHz, when the antenna of transponder during near alternating magnetic field, magnetic field energy by coil coupling in the transponder oscillating circuit; On the one hand, transponder obtains energy from alternating magnetic field, keeps the work of internal integrated circuit, and on the other hand, the transponder load will react on the reader antenna coil to the absorption of energy, and this retroaction can cause the change in voltage of reader antenna; If come switching on and off of control load by data, just these data are transferred to ID card identification reader from transponder.
The used CPLD control and treatment circuit of ID card simulator is by MAX3223EEAP serial port circuit 2-10, Bluetooth circuit 2-11, transponder circuit 2-12, supply module 2-13 and CPLD module composition shown in Fig. 2,3.CPLD control and treatment circuit among the present invention is comprised of state control circuit 2-1, data interface circuit 2-2, coding circuit 2-3, arithmetic logical operation circuit 2-4, parameter register 2-5, data register 2-6, pulse generating circuit 2-7, counter 2-8, sequential control circuit 2-9; Its engineering process is: the input and output control end of 6 input and output control ends difference connection data interface circuit 2-2 of state control circuit 2-1, the input and output control end of coding circuit 2-3; 7 clock signal output terminals of the input and output control end of the input and output control end of arithmetic logical operation circuit 2-4, the input and output control end of parameter register 2-5, data register 2-6, the input and output control end of pulse generating circuit 2-7, sequential control circuit 2-9 connect respectively serial port circuit 2-10, Bluetooth circuit 2-11 and transponder circuit 2-12.
As shown in Figure 4, its software systems can be divided into simulator Back Administration Module 3-1, serial communication modular 3-2, load-modulate module 3-3, human-computer interface module 3-4 and memory module 3-5.Wherein: serial communication modular 3-2 is responsible for the communication with middle distance card reader 3-6.Just can send this ID number to CPLDID card simulator with the form of ASCII character when card reader is recorded to after effective ID number, transfer to CPLDID card simulator Back Administration Module 3-1 after serial communication modular 3-2 obtains this ID number and continue to process.
Load-modulate module 3-3 obtains ID number of ASCII character form by memory module 3-5, be converted into specific format, and the form control load-modulate circuit 3-7 with Manchester code sends data again.
Man-machine interface is responsible for system state demonstration, bluetooth state demonstration, intercepted data Fumction display and sends data function showing.
Memory module 3-5 is responsible for the accessing operation in EEPROM ID number.
Simulator Back Administration Module 3-1 is the backstage of whole software systems, is responsible for calling other module.
By the above, can judge exactly ID card card number based on the low-frequency ID card real time simulator of CPLD, and the behavior of Simulation with I D card.
Claims (4)
1. based on the low-frequency ID card real-time simulation simulator of CPLD control chip, comprise: RS232 (1-1), CPLD (1-2), inductive coupling transponder (1-3) and bluetooth (1-4), it is characterized in that CPLD (1-2) utilizes ID card identification reader that ID card card number is recorded out in the variation of the energy of electromagnetic field in space, carrier frequency is 125KHz, its spatial dimension be card reading antennas just around 0～100cm, CPLD (1-2) uploads ID card card number by RS232 (1-1) record and by bluetooth (1-4), select any handset apparatus storage that installs upper computer software and discharge ID card card number to CPLD (1-2), send the data to the behavior of inductive coupling transponder (1-3) Simulation with I D card by CPLD (1-2) again.
2. the low-frequency ID card real-time simulation simulator based on the CPLD control chip according to claim 1 is characterized in that the ID card sends the electromagnetic wave of 125KHz towards periphery, the longest 100cm that reaches of the operating distance in card reading antennas the place ahead; The ID card enters and will obtain electric energy and activate the internal control chip after the ID card is identified the energy field of reader, control chip repeats to send to ID card identification reader with 64 ID card card number with the form of Manchester code, ID card identification reader is decoded to the binary sequence that receives and is obtained ID card card number, sends CPLD to by serial ports again.
3. the low-frequency ID card real-time simulation simulator based on the CPLD control chip according to claim 1 is characterized in that described bluetooth (1-4) is duplexing serial ports bluetooth module, it can be up descending Serial Port Information; CPLD sends to hand-held set with the ID card card number of collecting by bluetooth serial ports; The ID card card number that hand-held set will be simulated by bluetooth sends to CPLD, and the low-frequency ID card real time simulator of CPLD will be simulated this low frequency card behavior.
4. the low-frequency ID card real-time simulation simulator based on the CPLD control chip according to claim 1, it is characterized in that the aerial coil of ID card identification reader produces the alternating magnetic field of 125KHz, when the antenna of electromagnetic coupled formula transponder during near alternating magnetic field, magnetic field energy by coil coupling in inductive coupling transponder oscillating circuit; On the one hand, transponder obtains energy from alternating magnetic field, keeps the work of internal integrated circuit, and on the other hand, the transponder load will react on the reader antenna coil to the absorption of energy, and this retroaction can cause the change in voltage of reader antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200910117473 CN101923631B (en) | 2009-09-23 | 2009-09-23 | CPLD-based low-frequency ID card real-time simulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910117473 CN101923631B (en) | 2009-09-23 | 2009-09-23 | CPLD-based low-frequency ID card real-time simulator |
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| CN101923631A CN101923631A (en) | 2010-12-22 |
| CN101923631B true CN101923631B (en) | 2013-04-17 |
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| CN 200910117473 Expired - Fee Related CN101923631B (en) | 2009-09-23 | 2009-09-23 | CPLD-based low-frequency ID card real-time simulator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102799838B (en) * | 2011-05-22 | 2015-11-18 | 阿艾夫技术有限公司 | RFID random frequency hopping method |
| CN112598094A (en) * | 2020-12-10 | 2021-04-02 | 湖北文理学院 | Short-distance communication system and communication method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4650981A (en) * | 1984-01-26 | 1987-03-17 | Foletta Wayne S | Credit card with active electronics |
| CN101197000A (en) * | 2007-11-30 | 2008-06-11 | 江苏天奇物流系统工程股份有限公司 | Position recognition method and device using radio frequency recognizing technology |
| CN201111077Y (en) * | 2007-08-23 | 2008-09-03 | 北京思创银联科技有限公司 | Second generation resident identification card build-in identification number reader |
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2009
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4650981A (en) * | 1984-01-26 | 1987-03-17 | Foletta Wayne S | Credit card with active electronics |
| CN201111077Y (en) * | 2007-08-23 | 2008-09-03 | 北京思创银联科技有限公司 | Second generation resident identification card build-in identification number reader |
| CN101197000A (en) * | 2007-11-30 | 2008-06-11 | 江苏天奇物流系统工程股份有限公司 | Position recognition method and device using radio frequency recognizing technology |
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